* [PATCH v6 3/7] fs/splice: support compiling out splice-family syscalls
From: Pieter Smith @ 2014-12-04 17:50 UTC (permalink / raw)
To: linux-kernel
Cc: Josh Triplett, Pieter Smith, Alexander Duyck, Alexander Viro,
Alexei Starovoitov, Andrew Morton, Bertrand Jacquin,
Catalina Mocanu, Daniel Borkmann, David S. Miller, Eric Dumazet,
Eric W. Biederman, Fabian Frederick,
open list:FUSE: FILESYSTEM..., Geert Uytterhoeven, Hugh Dickins,
Iulia Manda, Jan Beulich, J. Bruce Fields, Jeff Layton,
open list:ABI/API, linux-fsd
In-Reply-To: <1417715473-24110-1-git-send-email-pieter@boesman.nl>
Many embedded systems will not need the splice-family syscalls (splice,
vmsplice, tee and sendfile). Omitting them saves space. This adds a new EXPERT
config option CONFIG_SYSCALL_SPLICE (default y) to support compiling them out.
The goal is to completely compile out fs/splice along with the syscalls. To
achieve this, the remaining patch-set will deal with fs/splice exports. As far
as possible, the impact on other device drivers will be minimized so as to
reduce the overal maintenance burden of CONFIG_SYSCALL_SPLICE.
The use of exported functions will be solved by transparently mocking them out
with static inlines. Uses of the exported pipe_buf_operations struct however
require direct modification in fs/fuse and net/core. The next two patches will
deal with this.
The last change required before fs/splice can be comipled out is making fs/nfsd
aware of the lacking splice support in file-systems when CONFIG_SYSCALL_SPLICE
is undefined.
The bloat benefit of this patch given a tinyconfig is:
add/remove: 0/16 grow/shrink: 2/5 up/down: 114/-3693 (-3579)
function old new delta
splice_direct_to_actor 348 416 +68
splice_to_pipe 371 417 +46
splice_from_pipe_next 107 106 -1
fdput 11 - -11
signal_pending 39 26 -13
fdget 56 42 -14
user_page_pipe_buf_ops 20 - -20
user_page_pipe_buf_steal 25 - -25
file_end_write 58 29 -29
file_start_write 68 34 -34
pipe_to_user 43 - -43
wakeup_pipe_readers 54 - -54
do_splice_to 87 - -87
ipipe_prep.part 92 - -92
opipe_prep.part 119 - -119
sys_sendfile 122 - -122
sys_sendfile64 126 - -126
sys_vmsplice 137 - -137
vmsplice_to_user 205 - -205
sys_tee 491 - -491
do_sendfile 492 - -492
vmsplice_to_pipe 558 - -558
sys_splice 1020 - -1020
Signed-off-by: Pieter Smith <pieter@boesman.nl>
---
fs/splice.c | 2 ++
init/Kconfig | 10 ++++++++++
kernel/sys_ni.c | 8 ++++++++
3 files changed, 20 insertions(+)
diff --git a/fs/splice.c b/fs/splice.c
index 44b201b..7c4c695 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1316,6 +1316,7 @@ long do_splice_direct(struct file *in, loff_t *ppos, struct file *out,
return ret;
}
+#ifdef CONFIG_SYSCALL_SPLICE
static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe,
struct pipe_inode_info *opipe,
size_t len, unsigned int flags);
@@ -2200,4 +2201,5 @@ COMPAT_SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd,
return do_sendfile(out_fd, in_fd, NULL, count, 0);
}
#endif
+#endif
diff --git a/init/Kconfig b/init/Kconfig
index d811d5f..dec9819 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1571,6 +1571,16 @@ config NTP
system clock to an NTP server, you can disable this option to save
space.
+config SYSCALL_SPLICE
+ bool "Enable splice/vmsplice/tee/sendfile syscalls" if EXPERT
+ default y
+ help
+ This option enables the splice, vmsplice, tee and sendfile syscalls. These
+ are used by applications to: move data between buffers and arbitrary file
+ descriptors; "copy" data between buffers; or copy data from userspace into
+ buffers. If building an embedded system where no applications use these
+ syscalls, you can disable this option to save space.
+
config PCI_QUIRKS
default y
bool "Enable PCI quirk workarounds" if EXPERT
diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c
index d2f5b00..25d5551 100644
--- a/kernel/sys_ni.c
+++ b/kernel/sys_ni.c
@@ -170,6 +170,14 @@ cond_syscall(sys_fstat);
cond_syscall(sys_stat);
cond_syscall(sys_uname);
cond_syscall(sys_olduname);
+cond_syscall(sys_vmsplice);
+cond_syscall(sys_splice);
+cond_syscall(sys_tee);
+cond_syscall(sys_sendfile);
+cond_syscall(sys_sendfile64);
+cond_syscall(compat_sys_vmsplice);
+cond_syscall(compat_sys_sendfile);
+cond_syscall(compat_sys_sendfile64);
/* arch-specific weak syscall entries */
cond_syscall(sys_pciconfig_read);
--
2.1.0
^ permalink raw reply related
* [PATCH v6 2/7] fs: moved kernel_write to fs/read_write
From: Pieter Smith @ 2014-12-04 17:50 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Michael S. Tsirkin, Trond Myklebust, Bertrand Jacquin,
J. Bruce Fields, Eric Dumazet, Willem de Bruijn,
蔡正龙, Jeff Layton, Tom Herbert,
Alexei Starovoitov, Miklos Szeredi, Peter Foley, Hugh Dickins,
Xiao Guangrong, Geert Uytterhoeven, Mel Gorman, Matt Turner,
Paul E. McKenney, Alexander Duyck, Pieter Smith,
open list:FUSE: FILESYSTEM...
In-Reply-To: <1417715473-24110-1-git-send-email-pieter-qeJ+1H9vRZbz+pZb47iToQ@public.gmane.org>
kernel_write shares infrastructure with the read_write translation unit but not
with the splice translation unit. Grouping kernel_write with the read_write
translation unit is more logical. It also paves the way to compiling out the
splice group of syscalls for embedded systems that do not need them.
Signed-off-by: Pieter Smith <pieter-qeJ+1H9vRZbz+pZb47iToQ@public.gmane.org>
---
fs/read_write.c | 16 ++++++++++++++++
fs/splice.c | 16 ----------------
2 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/fs/read_write.c b/fs/read_write.c
index d9451ba..f4c8d8b 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1191,3 +1191,19 @@ COMPAT_SYSCALL_DEFINE5(pwritev, compat_ulong_t, fd,
}
#endif
+ssize_t kernel_write(struct file *file, const char *buf, size_t count,
+ loff_t pos)
+{
+ mm_segment_t old_fs;
+ ssize_t res;
+
+ old_fs = get_fs();
+ set_fs(get_ds());
+ /* The cast to a user pointer is valid due to the set_fs() */
+ res = vfs_write(file, (__force const char __user *)buf, count, &pos);
+ set_fs(old_fs);
+
+ return res;
+}
+EXPORT_SYMBOL(kernel_write);
+
diff --git a/fs/splice.c b/fs/splice.c
index c1a2861..44b201b 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -583,22 +583,6 @@ static ssize_t kernel_readv(struct file *file, const struct iovec *vec,
return res;
}
-ssize_t kernel_write(struct file *file, const char *buf, size_t count,
- loff_t pos)
-{
- mm_segment_t old_fs;
- ssize_t res;
-
- old_fs = get_fs();
- set_fs(get_ds());
- /* The cast to a user pointer is valid due to the set_fs() */
- res = vfs_write(file, (__force const char __user *)buf, count, &pos);
- set_fs(old_fs);
-
- return res;
-}
-EXPORT_SYMBOL(kernel_write);
-
ssize_t default_file_splice_read(struct file *in, loff_t *ppos,
struct pipe_inode_info *pipe, size_t len,
unsigned int flags)
--
2.1.0
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^ permalink raw reply related
* [PATCH v6 1/7] fs: move sendfile syscall into fs/splice
From: Pieter Smith @ 2014-12-04 17:50 UTC (permalink / raw)
To: linux-kernel
Cc: Josh Triplett, Pieter Smith, Alexander Duyck, Alexander Viro,
Alexei Starovoitov, Andrew Morton, Bertrand Jacquin,
Catalina Mocanu, Daniel Borkmann, David S. Miller, Eric Dumazet,
Eric W. Biederman, Fabian Frederick,
open list:FUSE: FILESYSTEM..., Geert Uytterhoeven, Hugh Dickins,
Iulia Manda, Jan Beulich, J. Bruce Fields, Jeff Layton,
open list:ABI/API, linux-fsd
In-Reply-To: <1417715473-24110-1-git-send-email-pieter@boesman.nl>
sendfile functionally forms part of the splice group of syscalls (splice,
vmsplice and tee). Grouping sendfile with splice paves the way to compiling out
the splice group of syscalls for embedded systems that do not need these.
add/remove: 0/0 grow/shrink: 7/2 up/down: 86/-61 (25)
function old new delta
file_start_write 34 68 +34
file_end_write 29 58 +29
sys_pwritev 115 122 +7
sys_preadv 115 122 +7
fdput_pos 29 36 +7
sys_pwrite64 115 116 +1
sys_pread64 115 116 +1
sys_tee 497 491 -6
sys_splice 1075 1020 -55
Signed-off-by: Pieter Smith <pieter@boesman.nl>
---
fs/read_write.c | 175 -------------------------------------------------------
fs/splice.c | 178 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 178 insertions(+), 175 deletions(-)
diff --git a/fs/read_write.c b/fs/read_write.c
index 7d9318c..d9451ba 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -1191,178 +1191,3 @@ COMPAT_SYSCALL_DEFINE5(pwritev, compat_ulong_t, fd,
}
#endif
-static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
- size_t count, loff_t max)
-{
- struct fd in, out;
- struct inode *in_inode, *out_inode;
- loff_t pos;
- loff_t out_pos;
- ssize_t retval;
- int fl;
-
- /*
- * Get input file, and verify that it is ok..
- */
- retval = -EBADF;
- in = fdget(in_fd);
- if (!in.file)
- goto out;
- if (!(in.file->f_mode & FMODE_READ))
- goto fput_in;
- retval = -ESPIPE;
- if (!ppos) {
- pos = in.file->f_pos;
- } else {
- pos = *ppos;
- if (!(in.file->f_mode & FMODE_PREAD))
- goto fput_in;
- }
- retval = rw_verify_area(READ, in.file, &pos, count);
- if (retval < 0)
- goto fput_in;
- count = retval;
-
- /*
- * Get output file, and verify that it is ok..
- */
- retval = -EBADF;
- out = fdget(out_fd);
- if (!out.file)
- goto fput_in;
- if (!(out.file->f_mode & FMODE_WRITE))
- goto fput_out;
- retval = -EINVAL;
- in_inode = file_inode(in.file);
- out_inode = file_inode(out.file);
- out_pos = out.file->f_pos;
- retval = rw_verify_area(WRITE, out.file, &out_pos, count);
- if (retval < 0)
- goto fput_out;
- count = retval;
-
- if (!max)
- max = min(in_inode->i_sb->s_maxbytes, out_inode->i_sb->s_maxbytes);
-
- if (unlikely(pos + count > max)) {
- retval = -EOVERFLOW;
- if (pos >= max)
- goto fput_out;
- count = max - pos;
- }
-
- fl = 0;
-#if 0
- /*
- * We need to debate whether we can enable this or not. The
- * man page documents EAGAIN return for the output at least,
- * and the application is arguably buggy if it doesn't expect
- * EAGAIN on a non-blocking file descriptor.
- */
- if (in.file->f_flags & O_NONBLOCK)
- fl = SPLICE_F_NONBLOCK;
-#endif
- file_start_write(out.file);
- retval = do_splice_direct(in.file, &pos, out.file, &out_pos, count, fl);
- file_end_write(out.file);
-
- if (retval > 0) {
- add_rchar(current, retval);
- add_wchar(current, retval);
- fsnotify_access(in.file);
- fsnotify_modify(out.file);
- out.file->f_pos = out_pos;
- if (ppos)
- *ppos = pos;
- else
- in.file->f_pos = pos;
- }
-
- inc_syscr(current);
- inc_syscw(current);
- if (pos > max)
- retval = -EOVERFLOW;
-
-fput_out:
- fdput(out);
-fput_in:
- fdput(in);
-out:
- return retval;
-}
-
-SYSCALL_DEFINE4(sendfile, int, out_fd, int, in_fd, off_t __user *, offset, size_t, count)
-{
- loff_t pos;
- off_t off;
- ssize_t ret;
-
- if (offset) {
- if (unlikely(get_user(off, offset)))
- return -EFAULT;
- pos = off;
- ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS);
- if (unlikely(put_user(pos, offset)))
- return -EFAULT;
- return ret;
- }
-
- return do_sendfile(out_fd, in_fd, NULL, count, 0);
-}
-
-SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd, loff_t __user *, offset, size_t, count)
-{
- loff_t pos;
- ssize_t ret;
-
- if (offset) {
- if (unlikely(copy_from_user(&pos, offset, sizeof(loff_t))))
- return -EFAULT;
- ret = do_sendfile(out_fd, in_fd, &pos, count, 0);
- if (unlikely(put_user(pos, offset)))
- return -EFAULT;
- return ret;
- }
-
- return do_sendfile(out_fd, in_fd, NULL, count, 0);
-}
-
-#ifdef CONFIG_COMPAT
-COMPAT_SYSCALL_DEFINE4(sendfile, int, out_fd, int, in_fd,
- compat_off_t __user *, offset, compat_size_t, count)
-{
- loff_t pos;
- off_t off;
- ssize_t ret;
-
- if (offset) {
- if (unlikely(get_user(off, offset)))
- return -EFAULT;
- pos = off;
- ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS);
- if (unlikely(put_user(pos, offset)))
- return -EFAULT;
- return ret;
- }
-
- return do_sendfile(out_fd, in_fd, NULL, count, 0);
-}
-
-COMPAT_SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd,
- compat_loff_t __user *, offset, compat_size_t, count)
-{
- loff_t pos;
- ssize_t ret;
-
- if (offset) {
- if (unlikely(copy_from_user(&pos, offset, sizeof(loff_t))))
- return -EFAULT;
- ret = do_sendfile(out_fd, in_fd, &pos, count, 0);
- if (unlikely(put_user(pos, offset)))
- return -EFAULT;
- return ret;
- }
-
- return do_sendfile(out_fd, in_fd, NULL, count, 0);
-}
-#endif
diff --git a/fs/splice.c b/fs/splice.c
index f5cb9ba..c1a2861 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -28,6 +28,7 @@
#include <linux/export.h>
#include <linux/syscalls.h>
#include <linux/uio.h>
+#include <linux/fsnotify.h>
#include <linux/security.h>
#include <linux/gfp.h>
#include <linux/socket.h>
@@ -2039,3 +2040,180 @@ SYSCALL_DEFINE4(tee, int, fdin, int, fdout, size_t, len, unsigned int, flags)
return error;
}
+
+static ssize_t do_sendfile(int out_fd, int in_fd, loff_t *ppos,
+ size_t count, loff_t max)
+{
+ struct fd in, out;
+ struct inode *in_inode, *out_inode;
+ loff_t pos;
+ loff_t out_pos;
+ ssize_t retval;
+ int fl;
+
+ /*
+ * Get input file, and verify that it is ok..
+ */
+ retval = -EBADF;
+ in = fdget(in_fd);
+ if (!in.file)
+ goto out;
+ if (!(in.file->f_mode & FMODE_READ))
+ goto fput_in;
+ retval = -ESPIPE;
+ if (!ppos) {
+ pos = in.file->f_pos;
+ } else {
+ pos = *ppos;
+ if (!(in.file->f_mode & FMODE_PREAD))
+ goto fput_in;
+ }
+ retval = rw_verify_area(READ, in.file, &pos, count);
+ if (retval < 0)
+ goto fput_in;
+ count = retval;
+
+ /*
+ * Get output file, and verify that it is ok..
+ */
+ retval = -EBADF;
+ out = fdget(out_fd);
+ if (!out.file)
+ goto fput_in;
+ if (!(out.file->f_mode & FMODE_WRITE))
+ goto fput_out;
+ retval = -EINVAL;
+ in_inode = file_inode(in.file);
+ out_inode = file_inode(out.file);
+ out_pos = out.file->f_pos;
+ retval = rw_verify_area(WRITE, out.file, &out_pos, count);
+ if (retval < 0)
+ goto fput_out;
+ count = retval;
+
+ if (!max)
+ max = min(in_inode->i_sb->s_maxbytes, out_inode->i_sb->s_maxbytes);
+
+ if (unlikely(pos + count > max)) {
+ retval = -EOVERFLOW;
+ if (pos >= max)
+ goto fput_out;
+ count = max - pos;
+ }
+
+ fl = 0;
+#if 0
+ /*
+ * We need to debate whether we can enable this or not. The
+ * man page documents EAGAIN return for the output at least,
+ * and the application is arguably buggy if it doesn't expect
+ * EAGAIN on a non-blocking file descriptor.
+ */
+ if (in.file->f_flags & O_NONBLOCK)
+ fl = SPLICE_F_NONBLOCK;
+#endif
+ file_start_write(out.file);
+ retval = do_splice_direct(in.file, &pos, out.file, &out_pos, count, fl);
+ file_end_write(out.file);
+
+ if (retval > 0) {
+ add_rchar(current, retval);
+ add_wchar(current, retval);
+ fsnotify_access(in.file);
+ fsnotify_modify(out.file);
+ out.file->f_pos = out_pos;
+ if (ppos)
+ *ppos = pos;
+ else
+ in.file->f_pos = pos;
+ }
+
+ inc_syscr(current);
+ inc_syscw(current);
+ if (pos > max)
+ retval = -EOVERFLOW;
+
+fput_out:
+ fdput(out);
+fput_in:
+ fdput(in);
+out:
+ return retval;
+}
+
+SYSCALL_DEFINE4(sendfile, int, out_fd, int, in_fd, off_t __user *, offset, size_t, count)
+{
+ loff_t pos;
+ off_t off;
+ ssize_t ret;
+
+ if (offset) {
+ if (unlikely(get_user(off, offset)))
+ return -EFAULT;
+ pos = off;
+ ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS);
+ if (unlikely(put_user(pos, offset)))
+ return -EFAULT;
+ return ret;
+ }
+
+ return do_sendfile(out_fd, in_fd, NULL, count, 0);
+}
+
+SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd, loff_t __user *, offset, size_t, count)
+{
+ loff_t pos;
+ ssize_t ret;
+
+ if (offset) {
+ if (unlikely(copy_from_user(&pos, offset, sizeof(loff_t))))
+ return -EFAULT;
+ ret = do_sendfile(out_fd, in_fd, &pos, count, 0);
+ if (unlikely(put_user(pos, offset)))
+ return -EFAULT;
+ return ret;
+ }
+
+ return do_sendfile(out_fd, in_fd, NULL, count, 0);
+}
+
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE4(sendfile, int, out_fd, int, in_fd,
+ compat_off_t __user *, offset, compat_size_t, count)
+{
+ loff_t pos;
+ off_t off;
+ ssize_t ret;
+
+ if (offset) {
+ if (unlikely(get_user(off, offset)))
+ return -EFAULT;
+ pos = off;
+ ret = do_sendfile(out_fd, in_fd, &pos, count, MAX_NON_LFS);
+ if (unlikely(put_user(pos, offset)))
+ return -EFAULT;
+ return ret;
+ }
+
+ return do_sendfile(out_fd, in_fd, NULL, count, 0);
+}
+
+COMPAT_SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd,
+ compat_loff_t __user *, offset, compat_size_t, count)
+{
+ loff_t pos;
+ ssize_t ret;
+
+ if (offset) {
+ if (unlikely(copy_from_user(&pos, offset, sizeof(loff_t))))
+ return -EFAULT;
+ ret = do_sendfile(out_fd, in_fd, &pos, count, 0);
+ if (unlikely(put_user(pos, offset)))
+ return -EFAULT;
+ return ret;
+ }
+
+ return do_sendfile(out_fd, in_fd, NULL, count, 0);
+}
+#endif
+
--
2.1.0
^ permalink raw reply related
* [PATCH v6 0/7] kernel tinification: optionally compile out splice family of syscalls (splice, vmsplice, tee and sendfile)
From: Pieter Smith @ 2014-12-04 17:50 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: Josh Triplett, Pieter Smith, Alexander Duyck, Alexander Viro,
Alexei Starovoitov, Andrew Morton, Bertrand Jacquin,
Catalina Mocanu, Daniel Borkmann, David S. Miller, Eric Dumazet,
Eric W. Biederman, Fabian Frederick,
open list:FUSE: FILESYSTEM..., Geert Uytterhoeven, Hugh Dickins,
Iulia Manda, Jan Beulich, J. Bruce Fields, Jeff Layton,
open list:ABI/API, linux-fsd
REPO: https://github.com/smipi1/linux-tinification.git
BRANCH: tiny/config-syscall-splice
BACKGROUND: This patch-set forms part of the Linux Kernel Tinification effort (
https://tiny.wiki.kernel.org/).
GOAL: Support compiling out the splice family of syscalls (splice, vmsplice,
tee and sendfile) along with all supporting infrastructure if not needed.
Many embedded systems will not need the splice-family syscalls. Omitting them
saves space.
HISTORY:
PATCH v6:
- Removed unnecessary addition of __maybe_unused in fs/fuse
PATCH v5:
- Fix up commit log still referring to dropped __splice_p()
PATCH v4:
- Drops __splice_p()
- Let nfsd fall back to non-splice support when splice is compiled out
- Style fixes
PATCH v3:
- Fixup commit logs so that they are consistent with patch strategy
- Style fixes
PATCH v2:
- Avoid the ifdef mess introduced in PATCH v1 by mocking out exported splice
functions.
STRATEGY:
a. With the goal of eventually compiling out fs/splice.c, several functions
that are only used in support of the the splice family of syscalls are moved
into fs/splice.c from fs/read_write.c. The kernel_write function that is not
used to support the splice syscalls is moved to fs/read_write.c.
b. Introduce an EXPERT kernel configuration option; CONFIG_SYSCALL_SPLICE; to
compile out the splice family of syscalls. This removes all userspace uses
of the splice infrastructure.
c. Splice exports an operations struct, nosteal_pipe_buf_ops. Eliminate the
uses of this struct when CONFIG_SYSCALL_SPLICE is undefined, so that splice
can later be compiled out.
d. Let nfsd fall back to non-splice support when splice is compiled out.
e. Compile out fs/splice.c. Functions exported by fs/splice are mocked out with
failing static inlines. This is done so as to all but eliminate the
maintenance burden on file-system drivers.
RESULTS: A tinyconfig bloat-o-meter score for the entire patch-set:
add/remove: 0/41 grow/shrink: 5/7 up/down: 23/-8422 (-8399)
function old new delta
sys_pwritev 115 122 +7
sys_preadv 115 122 +7
fdput_pos 29 36 +7
sys_pwrite64 115 116 +1
sys_pread64 115 116 +1
pipe_to_null 4 - -4
generic_pipe_buf_nosteal 6 - -6
spd_release_page 10 - -10
fdput 11 - -11
PageUptodate 22 11 -11
lock_page 36 24 -12
signal_pending 39 26 -13
fdget 56 42 -14
page_cache_pipe_buf_release 16 - -16
user_page_pipe_buf_ops 20 - -20
splice_write_null 24 4 -20
page_cache_pipe_buf_ops 20 - -20
nosteal_pipe_buf_ops 20 - -20
default_pipe_buf_ops 20 - -20
generic_splice_sendpage 24 - -24
user_page_pipe_buf_steal 25 - -25
splice_shrink_spd 27 - -27
pipe_to_user 43 - -43
direct_splice_actor 47 - -47
default_file_splice_write 49 - -49
wakeup_pipe_writers 54 - -54
wakeup_pipe_readers 54 - -54
write_pipe_buf 71 - -71
page_cache_pipe_buf_confirm 80 - -80
splice_grow_spd 87 - -87
do_splice_to 87 - -87
ipipe_prep.part 92 - -92
splice_from_pipe 93 - -93
splice_from_pipe_next 107 - -107
pipe_to_sendpage 109 - -109
page_cache_pipe_buf_steal 114 - -114
opipe_prep.part 119 - -119
sys_sendfile 122 - -122
generic_file_splice_read 131 8 -123
sys_sendfile64 126 - -126
sys_vmsplice 137 - -137
do_splice_direct 148 - -148
vmsplice_to_user 205 - -205
__splice_from_pipe 246 - -246
splice_direct_to_actor 348 - -348
splice_to_pipe 371 - -371
do_sendfile 492 - -492
sys_tee 497 - -497
vmsplice_to_pipe 558 - -558
default_file_splice_read 688 - -688
iter_file_splice_write 702 4 -698
sys_splice 1075 - -1075
__generic_file_splice_read 1109 - -1109
Pieter Smith (7):
fs: move sendfile syscall into fs/splice
fs: moved kernel_write to fs/read_write
fs/splice: support compiling out splice-family syscalls
fs/fuse: support compiling out splice
net/core: support compiling out splice
fs/nfsd: support compiling out splice
fs/splice: full support for compiling out splice
fs/Makefile | 3 +-
fs/fuse/dev.c | 4 +
fs/read_write.c | 181 +++------------------------------------------
fs/splice.c | 194 +++++++++++++++++++++++++++++++++++++++++++++----
include/linux/fs.h | 26 +++++++
include/linux/skbuff.h | 10 +++
include/linux/splice.h | 42 +++++++++++
init/Kconfig | 10 +++
kernel/sys_ni.c | 8 ++
net/core/skbuff.c | 11 ++-
net/sunrpc/svc.c | 2 +-
11 files changed, 299 insertions(+), 192 deletions(-)
--
2.1.0
^ permalink raw reply
* RFC: kselftest size roadmap
From: Tim Bird @ 2014-12-04 16:56 UTC (permalink / raw)
To: Josh Triplett
Cc: Shuah Khan, linux-api@vger.kernel.org, Thomas Petazzoni,
Michael Ellerman, linux-embedded@vger.kernel.org,
linux-kernel@vger.kernel.org
In-Reply-To: <20141204003653.GA5004@thin>
Here's an RFC on my roadmap for the kselftest size test going forward...
In the long term, I'd like to be able to use the test for bisecting
size regressions, and to allow any kernel developer to use this even if they
don't have hardware for a particular architecture.
What I'd like to add to this in the future:
- cleaned up approach to cross-compilation
- put CROSS_COMPILE handling outside sub-directory Makefiles
- this should include support for KBUILD_OUTPUT
- handle CFLAGS for user-space programs (as opposed to
kernel CFLAGS), and in a unified way
- ability to run on target or in emulator
- will involve adding an "install phase", and
possibly a "collect results" phase. These are needed
throughout kselftest to do any host/target
testing.
- add a size threshold parameter to allow the
test to check for a regression
- test needs to return failure code that git
bisect can use (not sure about mechanism for this yet)
- regression test might utilize a feature to save off a
"baseline" size to measure against, for the ability
to indicate a regression as "current size > baseline + 20k"
Any feedback on this?
Thanks,
-- Tim
^ permalink raw reply
* Re: [PATCH v5] selftest: size: Add size test for Linux kernel
From: Tim Bird @ 2014-12-04 16:39 UTC (permalink / raw)
To: Michael Ellerman
Cc: Shuah Khan, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Josh Triplett,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-embedded-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Geert Uytterhoeven
In-Reply-To: <1417651707.9123.1.camel@concordia>
On 12/03/2014 04:08 PM, Michael Ellerman wrote:
> On Wed, 2014-12-03 at 08:29 -0800, Tim Bird wrote:
>>
>> On 12/02/2014 07:43 PM, Michael Ellerman wrote:
>>> On Tue, 2014-12-02 at 19:36 -0800, Tim Bird wrote:
>>>> This test shows the amount of memory used by the system.
>>>> Note that this is dependent on the user-space that is loaded
>>>> when this program runs. Optimally, this program would be
>>>> run as the init program itself.
>>>
>>> Sorry to only chime in at v5.
>>>
>>>> diff --git a/tools/testing/selftests/size/Makefile b/tools/testing/selftests/size/Makefile
>>>> new file mode 100644
>>>> index 0000000..47f8e9c
>>>> --- /dev/null
>>>> +++ b/tools/testing/selftests/size/Makefile
>>>> @@ -0,0 +1,15 @@
>>>> +#ifndef CC
>>>> + CC = $(CROSS_COMPILE)gcc
>>>> +#endif
>>>
>>> I think the following is preferable:
>>>
>>> CC := $(CROSS_COMPILE)$(CC)
>>>
>>>
>>> It allows optionally setting a custom CC, as well as optionally CROSS_COMPILE.
>>
>> I'm not sure I follow this.
>>
>> If CC is unset, you get only the CROSS_COMPILE prefix.
>
> CC is never unset. The default value is 'cc'.
Yeah - I found that out by experimentation yesterday. So my whole
idea for configuring it based on an unset CC was misguided.
>
>> If CC is set to e.g. 'gcc', then you get a nicely formatted toolchain string.
>
> Right.
>
>> But if CC already has the prefix applied, then this will result in
>> having it duplicated, which surely won't work correctly.
>
> That's just PEBKAC. Don't specify CROSS_COMPILE and also a fully specified CC.
> Try it with the kernel Makefile and see how well it works.
>
>> CROSS_COMPILE prefix usage looks a bit uncoordinated in the tools directory, but most
>> tests seem to be favoring $(CROSS_COMPILE)gcc.
>
> That doesn't make it right :)
Agreed. I'd like to separate this issue from the rest of the patch.
Shuah has accepted the patch as it currently is, but I'd like
to start working on the best way to support cross compilation
throughout the kselftest suite.
Ideally we can have CC set properly in a higher-level Makefile,
and not reference CROSS_COMPILE at all in the sub-directory Makefiles.
This may involve copying how CROSS_COMPILE and CFLAGS work in
the rest of the kernel tree, or making some kselftest-specific
modifications.
-- Tim
^ permalink raw reply
* Re: [PATCH net-next v4 0/4] netns: allow to identify peer netns
From: Nicolas Dichtel @ 2014-12-04 16:21 UTC (permalink / raw)
To: Eric W. Biederman
Cc: netdev-u79uwXL29TY76Z2rM5mHXA,
containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA, luto-kltTT9wpgjJwATOyAt5JVQ,
stephen-OTpzqLSitTUnbdJkjeBofR2eb7JE58TQ,
cwang-xCSkyg8dI+0RB7SZvlqPiA, linux-api-u79uwXL29TY76Z2rM5mHXA,
akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b,
davem-fT/PcQaiUtIeIZ0/mPfg9Q
In-Reply-To: <545A32C4.7070108-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
Le 05/11/2014 15:23, Nicolas Dichtel a écrit :
> Le 31/10/2014 20:14, Eric W. Biederman a écrit :
>> Nicolas Dichtel <nicolas.dichtel@6wind.com> writes:
>>
>>> Le 30/10/2014 19:41, Eric W. Biederman a écrit :
>>>> Nicolas Dichtel <nicolas.dichtel@6wind.com> writes:
>>>>
>>>>> The goal of this serie is to be able to multicast netlink messages with an
>>>>> attribute that identify a peer netns.
>>>>> This is needed by the userland to interpret some informations contained in
>>>>> netlink messages (like IFLA_LINK value, but also some other attributes in case
>>>>> of x-netns netdevice (see also
>>>>> http://thread.gmane.org/gmane.linux.network/315933/focus=316064 and
>>>>> http://thread.gmane.org/gmane.linux.kernel.containers/28301/focus=4239)).
>>>>>
>>>>> Ids of peer netns are set by userland via a new genl messages. These ids are
>>>>> stored per netns and are local (ie only valid in the netns where they are
>>>>> set).
>>>>> To avoid allocating an int for each peer netns, I use idr_for_each() to
>>>>> retrieve
>>>>> the id of a peer netns. Note that it will be possible to add a table
>>>>> (struct net
>>>>> -> id) later to optimize this lookup if needed.
>>>>>
>>>>> Patch 1/4 introduces the netlink API mechanism to set and get these ids.
>>>>> Patch 2/4 and 3/4 implements an example of how to use these ids in rtnetlink
>>>>> messages. And patch 4/4 shows that the netlink messages can be symetric
>>>>> between
>>>>> a GET and a SET.
>>>>>
>>>>> iproute2 patches are available, I can send them on demand.
>>>>
>>>> A quick reply. I think this patchset is in the right general direction.
>>>> There are some oddball details that seem odd/awkward to me such as using
>>>> genetlink instead of rtnetlink to get and set the ids, and not having
>>>> ids if they are not set (that feels like a maintenance/usability challenge).
>>> No problem to use rtnetlink, in fact, I hesitated.
>>>
>>> For the second point, I'm not sure to follow you: how to have an id, which will
>>> not break migration, without asking the user to set it?
>>
>> We have that situtation with ifindex already. Basically the thought is
>> to allow an id to be set, but also allow an id to be auto-generated if
>> we use an namespace without an id being set.
> If my understanding is correct, the difference is that we want to hide some
> netns.
> Do you think we can generate an id for each netns that does not have one and
> relying on the fact that this id has no meaning unless you have a netns file
> descriptor that allow you to get the id of this netns?
Any comment Eric ?
Thank you,
Nicolas
_______________________________________________
Containers mailing list
Containers@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/containers
^ permalink raw reply
* Re: [tpmdd-devel] [PATCH v9 8/8] tpm: TPM 2.0 FIFO Interface
From: Scot Doyle @ 2014-12-04 15:25 UTC (permalink / raw)
To: Jarkko Sakkinen
Cc: Peter Huewe, Ashley Lai, Marcel Selhorst,
christophe.ricard-Re5JQEeQqe8AvxtiuMwx3w,
josh.triplett-ral2JQCrhuEAvxtiuMwx3w,
linux-api-u79uwXL29TY76Z2rM5mHXA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA, Will Arthur,
tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
jason.gunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/,
trousers-tech-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f
In-Reply-To: <1417672518-4530-9-git-send-email-jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Hi Jarkko,
On Thu, 4 Dec 2014, Jarkko Sakkinen wrote:
> From: Will Arthur <will.c.arthur-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
>
> Detect TPM 2.0 by using the extended STS (STS3) register. For TPM 2.0,
> instead of calling tpm_get_timeouts(), assign duration and timeout
> values defined in the TPM 2.0 PTP specification.
>
> Signed-off-by: Will Arthur <will.c.arthur-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
> ---
> drivers/char/tpm/tpm_tis.c | 80 ++++++++++++++++++++++++++++++++++++++--------
> 1 file changed, 67 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
> index 89e1abb..71cbb2d 100644
> --- a/drivers/char/tpm/tpm_tis.c
> +++ b/drivers/char/tpm/tpm_tis.c
> @@ -1,5 +1,6 @@
> /*
> * Copyright (C) 2005, 2006 IBM Corporation
> + * Copyright (C) 2014 Intel Corporation
> *
> * Authors:
> * Leendert van Doorn <leendert-aZOuKsOsJu3MbYB6QlFGEg@public.gmane.org>
> @@ -44,6 +45,10 @@ enum tis_status {
> TPM_STS_DATA_EXPECT = 0x08,
> };
>
> +enum tis_status3 {
> + TPM_STS3_TPM2_FAM = 0x04,
> +};
> +
> enum tis_int_flags {
> TPM_GLOBAL_INT_ENABLE = 0x80000000,
> TPM_INTF_BURST_COUNT_STATIC = 0x100,
> @@ -70,6 +75,7 @@ enum tis_defaults {
> #define TPM_INT_STATUS(l) (0x0010 | ((l) << 12))
> #define TPM_INTF_CAPS(l) (0x0014 | ((l) << 12))
> #define TPM_STS(l) (0x0018 | ((l) << 12))
> +#define TPM_STS3(l) (0x001b | ((l) << 12))
> #define TPM_DATA_FIFO(l) (0x0024 | ((l) << 12))
>
> #define TPM_DID_VID(l) (0x0F00 | ((l) << 12))
> @@ -363,6 +369,7 @@ static int tpm_tis_send_main(struct tpm_chip *chip, u8 *buf, size_t len)
> {
> int rc;
> u32 ordinal;
> + unsigned long dur;
>
> rc = tpm_tis_send_data(chip, buf, len);
> if (rc < 0)
> @@ -374,9 +381,14 @@ static int tpm_tis_send_main(struct tpm_chip *chip, u8 *buf, size_t len)
>
> if (chip->vendor.irq) {
> ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
> +
> + if (chip->flags & TPM_CHIP_FLAG_TPM2)
> + dur = tpm2_calc_ordinal_duration(chip, ordinal);
> + else
> + dur = tpm_calc_ordinal_duration(chip, ordinal);
> +
> if (wait_for_tpm_stat
> - (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
> - tpm_calc_ordinal_duration(chip, ordinal),
> + (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID, dur,
> &chip->vendor.read_queue, false) < 0) {
> rc = -ETIME;
> goto out_err;
> @@ -588,6 +600,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
> int rc, i, irq_s, irq_e, probe;
> struct tpm_chip *chip;
> struct priv_data *priv;
> + u8 sts3;
>
> priv = devm_kzalloc(dev, sizeof(struct priv_data), GFP_KERNEL);
> if (priv == NULL)
> @@ -604,11 +617,28 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
> if (!chip->vendor.iobase)
> return -EIO;
>
> + sts3 = ioread8(chip->vendor.iobase + TPM_STS3(1));
> + if ((sts3 & TPM_STS3_TPM2_FAM) == TPM_STS3_TPM2_FAM)
> + chip->flags = TPM_CHIP_FLAG_TPM2;
> +
> /* Default timeouts */
> - chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
> - chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
> - chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
> - chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
> + if (chip->flags & TPM_CHIP_FLAG_TPM2) {
> + chip->vendor.timeout_a = usecs_to_jiffies(TPM2_TIMEOUT_A);
> + chip->vendor.timeout_b = usecs_to_jiffies(TPM2_TIMEOUT_B);
> + chip->vendor.timeout_c = usecs_to_jiffies(TPM2_TIMEOUT_C);
> + chip->vendor.timeout_d = usecs_to_jiffies(TPM2_TIMEOUT_D);
> + chip->vendor.duration[TPM_SHORT] =
> + usecs_to_jiffies(TPM2_DURATION_SHORT);
> + chip->vendor.duration[TPM_MEDIUM] =
> + usecs_to_jiffies(TPM2_DURATION_MEDIUM);
> + chip->vendor.duration[TPM_LONG] =
> + usecs_to_jiffies(TPM2_DURATION_LONG);
> + } else {
> + chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
> + chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
> + chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
> + chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
> + }
>
> if (wait_startup(chip, 0) != 0) {
> rc = -ENODEV;
> @@ -623,8 +653,8 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
> vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
> chip->vendor.manufacturer_id = vendor;
>
> - dev_info(dev,
> - "1.2 TPM (device-id 0x%X, rev-id %d)\n",
> + dev_info(dev, "%s TPM (device-id 0x%X, rev-id %d)\n",
> + (chip->flags & TPM_CHIP_FLAG_TPM2) ? "2.0" : "1.2",
> vendor >> 16, ioread8(chip->vendor.iobase + TPM_RID(0)));
>
> if (!itpm) {
> @@ -665,6 +695,23 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
> if (intfcaps & TPM_INTF_DATA_AVAIL_INT)
> dev_dbg(dev, "\tData Avail Int Support\n");
>
> + /* get the timeouts before testing for irqs */
> + if (!(chip->flags & TPM_CHIP_FLAG_TPM2) && tpm_get_timeouts(chip)) {
> + dev_err(dev, "Could not get TPM timeouts and durations\n");
> + rc = -ENODEV;
> + goto out_err;
> + }
> +
> + if (chip->flags & TPM_CHIP_FLAG_TPM2)
> + rc = tpm2_do_selftest(chip);
> + else
> + rc = tpm_do_selftest(chip);
> + if (rc) {
> + dev_err(dev, "TPM self test failed\n");
> + rc = -ENODEV;
> + goto out_err;
> + }
> +
> /* INTERRUPT Setup */
> init_waitqueue_head(&chip->vendor.read_queue);
> init_waitqueue_head(&chip->vendor.int_queue);
In Peter's for-james branch, commit 0e6cb01, the v1.2 calls to
tpm_get_timeouts and tpm_do_selftest were moved toward the end of
tpm_tis_init.
> @@ -720,7 +767,10 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
> chip->vendor.probed_irq = 0;
>
> /* Generate Interrupts */
> - tpm_gen_interrupt(chip);
> + if (chip->flags & TPM_CHIP_FLAG_TPM2)
> + tpm2_gen_interrupt(chip);
> + else
> + tpm_gen_interrupt(chip);
>
> chip->vendor.irq = chip->vendor.probed_irq;
>
> @@ -808,14 +858,18 @@ static void tpm_tis_reenable_interrupts(struct tpm_chip *chip)
> static int tpm_tis_resume(struct device *dev)
> {
> struct tpm_chip *chip = dev_get_drvdata(dev);
> - int ret;
> + int ret = 0;
>
> if (chip->vendor.irq)
> tpm_tis_reenable_interrupts(chip);
>
> - ret = tpm_pm_resume(dev);
> - if (!ret)
> - tpm_do_selftest(chip);
> + if (chip->flags & TPM_CHIP_FLAG_TPM2)
> + tpm2_do_selftest(chip);
> + else {
> + ret = tpm_pm_resume(dev);
> + if (!ret)
> + tpm_do_selftest(chip);
> + }
>
> return ret;
> }
> --
> 2.1.0
>
^ permalink raw reply
* [PATCH v4 5/5] tty/serial: Add Spreadtrum sc9836-uart driver support
From: Chunyan Zhang @ 2014-12-04 11:34 UTC (permalink / raw)
To: gregkh, mark.rutland, arnd, gnomes, broonie, robh+dt, pawel.moll,
ijc+devicetree, galak, will.deacon, catalin.marinas, jslaby,
jason, heiko, florian.vaussard, andrew, rrichter, hytszk,
grant.likely, orsonzhai, geng.ren, zhizhou.zhang, lanqing.liu,
zhang.lyra, wei.qiao
Cc: devicetree, linux-arm-kernel, linux-kernel, sprdlinux, linux-doc,
linux-serial, linux-api, arm
In-Reply-To: <1417692860-18841-1-git-send-email-chunyan.zhang@spreadtrum.com>
Add a full sc9836-uart driver for SC9836 SoC which is based on the
spreadtrum sharkl64 platform.
This driver also support earlycon.
This patch also replaced the spaces between the macros and their
values with the tabs in serial_core.h
Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Signed-off-by: Orson Zhai <orson.zhai@spreadtrum.com>
Originally-by: Lanqing Liu <lanqing.liu@spreadtrum.com>
---
drivers/tty/serial/Kconfig | 18 +
drivers/tty/serial/Makefile | 1 +
drivers/tty/serial/sprd_serial.c | 761 ++++++++++++++++++++++++++++++++++++++
include/uapi/linux/serial_core.h | 3 +
4 files changed, 783 insertions(+)
create mode 100644 drivers/tty/serial/sprd_serial.c
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 649b784..7b9b0f4 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1573,6 +1573,24 @@ config SERIAL_MEN_Z135
This driver can also be build as a module. If so, the module will be called
men_z135_uart.ko
+config SERIAL_SPRD
+ tristate "Support for SPRD serial"
+ depends on ARCH_SPRD
+ select SERIAL_CORE
+ help
+ This enables the driver for the Spreadtrum's serial.
+
+config SERIAL_SPRD_CONSOLE
+ bool "SPRD UART console support"
+ depends on SERIAL_SPRD=y
+ select SERIAL_CORE_CONSOLE
+ select SERIAL_EARLYCON
+ help
+ Support for early debug console using Spreadtrum's serial. This enables
+ the console before standard serial driver is probed. This is enabled
+ with "earlycon" on the kernel command line. The console is
+ enabled when early_param is processed.
+
endmenu
config SERIAL_MCTRL_GPIO
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index 9a548ac..4801aca 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -93,6 +93,7 @@ obj-$(CONFIG_SERIAL_ARC) += arc_uart.o
obj-$(CONFIG_SERIAL_RP2) += rp2.o
obj-$(CONFIG_SERIAL_FSL_LPUART) += fsl_lpuart.o
obj-$(CONFIG_SERIAL_MEN_Z135) += men_z135_uart.o
+obj-$(CONFIG_SERIAL_SPRD) += sprd_serial.o
# GPIOLIB helpers for modem control lines
obj-$(CONFIG_SERIAL_MCTRL_GPIO) += serial_mctrl_gpio.o
diff --git a/drivers/tty/serial/sprd_serial.c b/drivers/tty/serial/sprd_serial.c
new file mode 100644
index 0000000..1ad800e
--- /dev/null
+++ b/drivers/tty/serial/sprd_serial.c
@@ -0,0 +1,761 @@
+/*
+ * Copyright (C) 2012 Spreadtrum Communications Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/console.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/serial_core.h>
+#include <linux/serial.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+
+/* device name */
+#define UART_NR_MAX 8
+#define SPRD_TTY_NAME "ttySPX"
+#define SPRD_FIFO_SIZE 128
+#define SPRD_DEF_RATE 26000000
+#define SPRD_TIMEOUT 2048
+
+/* the offset of serial registers and BITs for them */
+/* data registers */
+#define SPRD_TXD 0x0000
+#define SPRD_RXD 0x0004
+
+/* line status register and its BITs */
+#define SPRD_LSR 0x0008
+#define SPRD_LSR_OE BIT(4)
+#define SPRD_LSR_FE BIT(3)
+#define SPRD_LSR_PE BIT(2)
+#define SPRD_LSR_BI BIT(7)
+#define SPRD_LSR_TX_OVER BIT(15)
+
+/* data number in TX and RX fifo */
+#define SPRD_STS1 0x000C
+
+/* interrupt enable register and its BITs */
+#define SPRD_IEN 0x0010
+#define SPRD_IEN_RX_FULL BIT(0)
+#define SPRD_IEN_TX_EMPTY BIT(1)
+#define SPRD_IEN_BREAK_DETECT BIT(7)
+#define SPRD_IEN_TIMEOUT BIT(13)
+
+/* interrupt clear register */
+#define SPRD_ICLR 0x0014
+
+/* line control register */
+#define SPRD_LCR 0x0018
+#define SPRD_LCR_STOP_1BIT 0x10
+#define SPRD_LCR_STOP_2BIT 0x30
+#define SPRD_LCR_DATA_LEN (BIT(2) | BIT(3))
+#define SPRD_LCR_DATA_LEN5 0x0
+#define SPRD_LCR_DATA_LEN6 0x4
+#define SPRD_LCR_DATA_LEN7 0x8
+#define SPRD_LCR_DATA_LEN8 0xc
+#define SPRD_LCR_PARITY (BIT(0) | BIT(1))
+#define SPRD_LCR_PARITY_EN 0x2
+#define SPRD_LCR_EVEN_PAR 0x0
+#define SPRD_LCR_ODD_PAR 0x1
+
+/* control register 1 */
+#define SPRD_CTL1 0x001C
+#define RX_HW_FLOW_CTL_THLD BIT(6)
+#define RX_HW_FLOW_CTL_EN BIT(7)
+#define TX_HW_FLOW_CTL_EN BIT(8)
+
+/* fifo threshold register */
+#define SPRD_CTL2 0x0020
+#define THLD_TX_EMPTY 0x40
+#define THLD_RX_FULL 0x40
+
+/* config baud rate register */
+#define SPRD_CLKD0 0x0024
+#define SPRD_CLKD1 0x0028
+
+/* interrupt mask status register */
+#define SPRD_IMSR 0x002C
+#define SPRD_IMSR_RX_FIFO_FULL BIT(0)
+#define SPRD_IMSR_TX_FIFO_EMPTY BIT(1)
+#define SPRD_IMSR_BREAK_DETECT BIT(7)
+#define SPRD_IMSR_TIMEOUT BIT(13)
+
+struct reg_backup {
+ uint32_t ien;
+ uint32_t ctrl0;
+ uint32_t ctrl1;
+ uint32_t ctrl2;
+ uint32_t clkd0;
+ uint32_t clkd1;
+ uint32_t dspwait;
+};
+struct sprd_uart_port {
+ struct uart_port port;
+ struct reg_backup reg_bak;
+ char name[16];
+};
+static struct sprd_uart_port *sprd_port[UART_NR_MAX] = { NULL };
+
+static inline unsigned int serial_in(struct uart_port *port, int offset)
+{
+ return readl_relaxed(port->membase + offset);
+}
+
+static inline void serial_out(struct uart_port *port, int offset, int value)
+{
+ writel_relaxed(value, port->membase + offset);
+}
+
+static unsigned int sprd_tx_empty(struct uart_port *port)
+{
+ if (serial_in(port, SPRD_STS1) & 0xff00)
+ return 0;
+ else
+ return TIOCSER_TEMT;
+}
+
+static unsigned int sprd_get_mctrl(struct uart_port *port)
+{
+ return TIOCM_DSR | TIOCM_CTS;
+}
+
+static void sprd_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+ /* nothing to do */
+}
+
+static void sprd_stop_tx(struct uart_port *port)
+{
+ unsigned int ien, iclr;
+
+ iclr = serial_in(port, SPRD_ICLR);
+ ien = serial_in(port, SPRD_IEN);
+
+ iclr |= SPRD_IEN_TX_EMPTY;
+ ien &= ~SPRD_IEN_TX_EMPTY;
+
+ serial_out(port, SPRD_ICLR, iclr);
+ serial_out(port, SPRD_IEN, ien);
+}
+
+static void sprd_start_tx(struct uart_port *port)
+{
+ unsigned int ien;
+
+ ien = serial_in(port, SPRD_IEN);
+ if (!(ien & SPRD_IEN_TX_EMPTY)) {
+ ien |= SPRD_IEN_TX_EMPTY;
+ serial_out(port, SPRD_IEN, ien);
+ }
+}
+
+static void sprd_stop_rx(struct uart_port *port)
+{
+ unsigned int ien, iclr;
+
+ iclr = serial_in(port, SPRD_ICLR);
+ ien = serial_in(port, SPRD_IEN);
+
+ ien &= ~(SPRD_IEN_RX_FULL | SPRD_IEN_BREAK_DETECT);
+ iclr |= SPRD_IEN_RX_FULL | SPRD_IEN_BREAK_DETECT;
+
+ serial_out(port, SPRD_IEN, ien);
+ serial_out(port, SPRD_ICLR, iclr);
+}
+
+/* The Sprd serial does not support this function. */
+static void sprd_break_ctl(struct uart_port *port, int break_state)
+{
+ /* nothing to do */
+}
+
+static inline int handle_lsr_errors(struct uart_port *port,
+ unsigned int *flag, unsigned int *lsr)
+{
+ int ret = 0;
+
+ /* stastics */
+ if (*lsr & SPRD_LSR_BI) {
+ *lsr &= ~(SPRD_LSR_FE | SPRD_LSR_PE);
+ port->icount.brk++;
+ ret = uart_handle_break(port);
+ if (ret)
+ return ret;
+ } else if (*lsr & SPRD_LSR_PE)
+ port->icount.parity++;
+ else if (*lsr & SPRD_LSR_FE)
+ port->icount.frame++;
+ if (*lsr & SPRD_LSR_OE)
+ port->icount.overrun++;
+
+ /* mask off conditions which should be ignored */
+ *lsr &= port->read_status_mask;
+ if (*lsr & SPRD_LSR_BI)
+ *flag = TTY_BREAK;
+ else if (*lsr & SPRD_LSR_PE)
+ *flag = TTY_PARITY;
+ else if (*lsr & SPRD_LSR_FE)
+ *flag = TTY_FRAME;
+
+ return ret;
+}
+
+static inline void sprd_rx(int irq, void *dev_id)
+{
+ struct uart_port *port = dev_id;
+ struct tty_port *tty = &port->state->port;
+ unsigned int ch, flag, lsr, max_count = SPRD_TIMEOUT;
+
+ while ((serial_in(port, SPRD_STS1) & 0x00ff) && max_count--) {
+ lsr = serial_in(port, SPRD_LSR);
+ ch = serial_in(port, SPRD_RXD);
+ flag = TTY_NORMAL;
+ port->icount.rx++;
+
+ if (lsr & (SPRD_LSR_BI | SPRD_LSR_PE
+ | SPRD_LSR_FE | SPRD_LSR_OE))
+ if (handle_lsr_errors(port, &lsr, &flag))
+ continue;
+ if (uart_handle_sysrq_char(port, ch))
+ continue;
+
+ uart_insert_char(port, lsr, SPRD_LSR_OE, ch, flag);
+ }
+
+ tty_flip_buffer_push(tty);
+}
+
+static inline void sprd_tx(int irq, void *dev_id)
+{
+ struct uart_port *port = dev_id;
+ struct circ_buf *xmit = &port->state->xmit;
+ int count;
+
+ if (port->x_char) {
+ serial_out(port, SPRD_TXD, port->x_char);
+ port->icount.tx++;
+ port->x_char = 0;
+ return;
+ }
+ if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
+ sprd_stop_tx(port);
+ return;
+ }
+ count = THLD_TX_EMPTY;
+ do {
+ serial_out(port, SPRD_TXD, xmit->buf[xmit->tail]);
+ xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+ port->icount.tx++;
+ if (uart_circ_empty(xmit))
+ break;
+ } while (--count > 0);
+
+ if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ uart_write_wakeup(port);
+
+ if (uart_circ_empty(xmit))
+ sprd_stop_tx(port);
+}
+
+/*
+ *this handles the interrupt from one port
+ */
+static irqreturn_t sprd_handle_irq(int irq, void *dev_id)
+{
+ struct uart_port *port = (struct uart_port *)dev_id;
+ u32 ims;
+
+ ims = serial_in(port, SPRD_IMSR);
+
+ if (!ims)
+ return IRQ_NONE;
+
+ serial_out(port, SPRD_ICLR, ~0);
+
+ if (ims & (SPRD_IMSR_RX_FIFO_FULL |
+ SPRD_IMSR_BREAK_DETECT | SPRD_IMSR_TIMEOUT)) {
+ sprd_rx(irq, port);
+ }
+ if (ims & SPRD_IMSR_TX_FIFO_EMPTY)
+ sprd_tx(irq, port);
+
+ return IRQ_HANDLED;
+}
+
+static int sprd_startup(struct uart_port *port)
+{
+ int ret = 0;
+ unsigned int ien, ctrl1;
+ unsigned int timeout;
+ struct sprd_uart_port *sp;
+
+ serial_out(port, SPRD_CTL2, ((THLD_TX_EMPTY << 8) | THLD_RX_FULL));
+
+ /* clear rx fifo */
+ timeout = SPRD_TIMEOUT;
+ while (timeout-- && serial_in(port, SPRD_STS1) & 0x00ff)
+ serial_in(port, SPRD_RXD);
+
+ /* clear tx fifo */
+ timeout = SPRD_TIMEOUT;
+ while (timeout-- && serial_in(port, SPRD_STS1) & 0xff00)
+ cpu_relax();
+
+ /* clear interrupt */
+ serial_out(port, SPRD_IEN, 0x0);
+ serial_out(port, SPRD_ICLR, ~0);
+
+ /* allocate irq */
+ sp = container_of(port, struct sprd_uart_port, port);
+ snprintf(sp->name, sizeof(sp->name), "sprd_serial%d", port->line);
+ ret = devm_request_irq(port->dev, port->irq, sprd_handle_irq,
+ IRQF_SHARED, sp->name, port);
+ if (ret) {
+ dev_err(port->dev, "fail to request serial irq %d\n",
+ port->irq);
+ return ret;
+ }
+ ctrl1 = serial_in(port, SPRD_CTL1);
+ ctrl1 |= 0x3e00 | THLD_RX_FULL;
+ serial_out(port, SPRD_CTL1, ctrl1);
+
+ /* enable interrupt */
+ spin_lock(&port->lock);
+ ien = serial_in(port, SPRD_IEN);
+ ien |= SPRD_IEN_RX_FULL | SPRD_IEN_BREAK_DETECT | SPRD_IEN_TIMEOUT;
+ serial_out(port, SPRD_IEN, ien);
+ spin_unlock(&port->lock);
+
+ return 0;
+}
+
+static void sprd_shutdown(struct uart_port *port)
+{
+ serial_out(port, SPRD_IEN, 0x0);
+ serial_out(port, SPRD_ICLR, ~0);
+ devm_free_irq(port->dev, port->irq, port);
+}
+
+static void sprd_set_termios(struct uart_port *port,
+ struct ktermios *termios,
+ struct ktermios *old)
+{
+ unsigned int baud, quot;
+ unsigned int lcr, fc;
+
+ /* ask the core to calculate the divisor for us */
+ baud = uart_get_baud_rate(port, termios, old, 1200, 3000000);
+
+ quot = (unsigned int)((port->uartclk + baud / 2) / baud);
+
+ /* set data length */
+ lcr = serial_in(port, SPRD_LCR);
+ lcr &= ~SPRD_LCR_DATA_LEN;
+ switch (termios->c_cflag & CSIZE) {
+ case CS5:
+ lcr |= SPRD_LCR_DATA_LEN5;
+ break;
+ case CS6:
+ lcr |= SPRD_LCR_DATA_LEN6;
+ break;
+ case CS7:
+ lcr |= SPRD_LCR_DATA_LEN7;
+ break;
+ case CS8:
+ default:
+ lcr |= SPRD_LCR_DATA_LEN8;
+ break;
+ }
+
+ /* calculate stop bits */
+ lcr &= ~(SPRD_LCR_STOP_1BIT | SPRD_LCR_STOP_2BIT);
+ if (termios->c_cflag & CSTOPB)
+ lcr |= SPRD_LCR_STOP_2BIT;
+ else
+ lcr |= SPRD_LCR_STOP_1BIT;
+
+ /* calculate parity */
+ lcr &= ~SPRD_LCR_PARITY;
+ termios->c_cflag &= ~CMSPAR; /* no support mark/space */
+ if (termios->c_cflag & PARENB) {
+ lcr |= SPRD_LCR_PARITY_EN;
+ if (termios->c_cflag & PARODD)
+ lcr |= SPRD_LCR_ODD_PAR;
+ else
+ lcr |= SPRD_LCR_EVEN_PAR;
+ }
+
+ /* change the port state. */
+ /* update the per-port timeout */
+ uart_update_timeout(port, termios->c_cflag, baud);
+
+ port->read_status_mask = SPRD_LSR_OE;
+ if (termios->c_iflag & INPCK)
+ port->read_status_mask |= SPRD_LSR_FE | SPRD_LSR_PE;
+ if (termios->c_iflag & (BRKINT | PARMRK))
+ port->read_status_mask |= SPRD_LSR_BI;
+
+ /* characters to ignore */
+ port->ignore_status_mask = 0;
+ if (termios->c_iflag & IGNPAR)
+ port->ignore_status_mask |= SPRD_LSR_PE | SPRD_LSR_FE;
+ if (termios->c_iflag & IGNBRK) {
+ port->ignore_status_mask |= SPRD_LSR_BI;
+ /*
+ * If we're ignoring parity and break indicators,
+ * ignore overruns too (for real raw support).
+ */
+ if (termios->c_iflag & IGNPAR)
+ port->ignore_status_mask |= SPRD_LSR_OE;
+ }
+
+ /* flow control */
+ fc = serial_in(port, SPRD_CTL1);
+ fc &= ~(RX_HW_FLOW_CTL_THLD | RX_HW_FLOW_CTL_EN | TX_HW_FLOW_CTL_EN);
+ if (termios->c_cflag & CRTSCTS) {
+ fc |= RX_HW_FLOW_CTL_THLD;
+ fc |= RX_HW_FLOW_CTL_EN;
+ fc |= TX_HW_FLOW_CTL_EN;
+ }
+
+ /* clock divider bit0~bit15 */
+ serial_out(port, SPRD_CLKD0, quot & 0xffff);
+
+ /* clock divider bit16~bit20 */
+ serial_out(port, SPRD_CLKD1, (quot & 0x1f0000) >> 16);
+ serial_out(port, SPRD_LCR, lcr);
+ fc |= 0x3e00 | THLD_RX_FULL;
+ serial_out(port, SPRD_CTL1, fc);
+
+ /* Don't rewrite B0 */
+ if (tty_termios_baud_rate(termios))
+ tty_termios_encode_baud_rate(termios, baud, baud);
+}
+
+static const char *sprd_type(struct uart_port *port)
+{
+ return "SPX";
+}
+
+static void sprd_release_port(struct uart_port *port)
+{
+ /* nothing to do */
+}
+
+static int sprd_request_port(struct uart_port *port)
+{
+ return 0;
+}
+
+static void sprd_config_port(struct uart_port *port, int flags)
+{
+ if (flags & UART_CONFIG_TYPE)
+ port->type = PORT_SPRD;
+}
+
+static int sprd_verify_port(struct uart_port *port,
+ struct serial_struct *ser)
+{
+ if (ser->type != PORT_SPRD)
+ return -EINVAL;
+ if (port->irq != ser->irq)
+ return -EINVAL;
+ return 0;
+}
+
+static struct uart_ops serial_sprd_ops = {
+ .tx_empty = sprd_tx_empty,
+ .get_mctrl = sprd_get_mctrl,
+ .set_mctrl = sprd_set_mctrl,
+ .stop_tx = sprd_stop_tx,
+ .start_tx = sprd_start_tx,
+ .stop_rx = sprd_stop_rx,
+ .break_ctl = sprd_break_ctl,
+ .startup = sprd_startup,
+ .shutdown = sprd_shutdown,
+ .set_termios = sprd_set_termios,
+ .type = sprd_type,
+ .release_port = sprd_release_port,
+ .request_port = sprd_request_port,
+ .config_port = sprd_config_port,
+ .verify_port = sprd_verify_port,
+};
+
+#ifdef CONFIG_SERIAL_SPRD_CONSOLE
+static inline void wait_for_xmitr(struct uart_port *port)
+{
+ unsigned int status, tmout = 10000;
+
+ /* wait up to 10ms for the character(s) to be sent */
+ do {
+ status = serial_in(port, SPRD_STS1);
+ if (--tmout == 0)
+ break;
+ udelay(1);
+ } while (status & 0xff00);
+}
+
+static void sprd_console_putchar(struct uart_port *port, int ch)
+{
+ wait_for_xmitr(port);
+ serial_out(port, SPRD_TXD, ch);
+}
+
+static void sprd_console_write(struct console *co, const char *s,
+ unsigned int count)
+{
+ struct uart_port *port = &sprd_port[co->index]->port;
+ int ien;
+ int locked = 1;
+
+ if (oops_in_progress)
+ locked = spin_trylock(&port->lock);
+ else
+ spin_lock(&port->lock);
+ /* save the IEN then disable the interrupts */
+ ien = serial_in(port, SPRD_IEN);
+ serial_out(port, SPRD_IEN, 0x0);
+
+ uart_console_write(port, s, count, sprd_console_putchar);
+
+ /* wait for transmitter to become empty and restore the IEN */
+ wait_for_xmitr(port);
+ serial_out(port, SPRD_IEN, ien);
+ if (locked)
+ spin_unlock(&port->lock);
+}
+
+static int __init sprd_console_setup(struct console *co, char *options)
+{
+ struct uart_port *port;
+ int baud = 115200;
+ int bits = 8;
+ int parity = 'n';
+ int flow = 'n';
+
+ if (co->index >= UART_NR_MAX || co->index < 0)
+ co->index = 0;
+
+ port = &sprd_port[co->index]->port;
+ if (port == NULL) {
+ pr_info("serial port %d not yet initialized\n", co->index);
+ return -ENODEV;
+ }
+ if (options)
+ uart_parse_options(options, &baud, &parity, &bits, &flow);
+
+ return uart_set_options(port, co, baud, parity, bits, flow);
+}
+
+static struct uart_driver sprd_uart_driver;
+static struct console sprd_console = {
+ .name = SPRD_TTY_NAME,
+ .write = sprd_console_write,
+ .device = uart_console_device,
+ .setup = sprd_console_setup,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+ .data = &sprd_uart_driver,
+};
+
+#define SPRD_CONSOLE (&sprd_console)
+
+/* Support for earlycon */
+static void sprd_putc(struct uart_port *port, int c)
+{
+ while (!(readl(port->membase + SPRD_LSR) & SPRD_LSR_TX_OVER))
+ ;
+ writeb(c, port->membase + SPRD_TXD);
+}
+
+static void sprd_early_write(struct console *con, const char *s,
+ unsigned n)
+{
+ struct earlycon_device *dev = con->data;
+
+ uart_console_write(&dev->port, s, n, sprd_putc);
+}
+
+static int __init sprd_early_console_setup(
+ struct earlycon_device *device,
+ const char *opt)
+{
+ if (!device->port.membase)
+ return -ENODEV;
+
+ device->con->write = sprd_early_write;
+ return 0;
+}
+
+EARLYCON_DECLARE(sprd_serial, sprd_early_console_setup);
+OF_EARLYCON_DECLARE(sprd_serial, "sprd,sc9836-uart",
+ sprd_early_console_setup);
+
+#else /* !CONFIG_SERIAL_SPRD_CONSOLE */
+#define SPRD_CONSOLE NULL
+#endif
+
+static struct uart_driver sprd_uart_driver = {
+ .owner = THIS_MODULE,
+ .driver_name = "sprd_serial",
+ .dev_name = SPRD_TTY_NAME,
+ .major = 0,
+ .minor = 0,
+ .nr = UART_NR_MAX,
+ .cons = SPRD_CONSOLE,
+};
+
+static int sprd_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct device_node *np = pdev->dev.of_node;
+ struct uart_port *up;
+ struct clk *clk;
+ int irq;
+
+
+ if (np)
+ pdev->id = of_alias_get_id(np, "serial");
+
+ if (pdev->id < 0 || pdev->id >= UART_NR_MAX) {
+ dev_err(&pdev->dev, "does not support id %d\n", pdev->id);
+ return -ENXIO;
+ }
+
+ sprd_port[pdev->id] = devm_kzalloc(&pdev->dev,
+ sizeof(*sprd_port[pdev->id]), GFP_KERNEL);
+ if (!sprd_port[pdev->id])
+ return -ENOMEM;
+
+ up = &sprd_port[pdev->id]->port;
+ up->dev = &pdev->dev;
+ up->line = pdev->id;
+ up->type = PORT_SPRD;
+ up->iotype = SERIAL_IO_PORT;
+ up->uartclk = SPRD_DEF_RATE;
+ up->fifosize = SPRD_FIFO_SIZE;
+ up->ops = &serial_sprd_ops;
+ up->flags = ASYNC_BOOT_AUTOCONF;
+
+ clk = devm_clk_get(&pdev->dev, NULL);
+ if (!IS_ERR(clk))
+ up->uartclk = clk_get_rate(clk);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "not provide mem resource\n");
+ return -ENODEV;
+ }
+ up->mapbase = res->start;
+ up->membase = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(up->membase))
+ return PTR_ERR(up->membase);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "not provide irq resource\n");
+ return -ENODEV;
+ }
+ up->irq = irq;
+
+ platform_set_drvdata(pdev, up);
+
+ return uart_add_one_port(&sprd_uart_driver, up);
+}
+
+static int sprd_remove(struct platform_device *dev)
+{
+ struct uart_port *up = platform_get_drvdata(dev);
+
+ return uart_remove_one_port(&sprd_uart_driver, up);
+}
+
+static int sprd_suspend(struct platform_device *dev, pm_message_t state)
+{
+ int id = dev->id;
+ struct uart_port *port = &sprd_port[id]->port;
+ struct reg_backup *reg_bak = &sprd_port[id]->reg_bak;
+
+ reg_bak->ien = serial_in(port, SPRD_IEN);
+ reg_bak->ctrl0 = serial_in(port, SPRD_LCR);
+ reg_bak->ctrl1 = serial_in(port, SPRD_CTL1);
+ reg_bak->ctrl2 = serial_in(port, SPRD_CTL2);
+ reg_bak->clkd0 = serial_in(port, SPRD_CLKD0);
+ reg_bak->clkd1 = serial_in(port, SPRD_CLKD1);
+
+ return 0;
+}
+
+static int sprd_resume(struct platform_device *dev)
+{
+ int id = dev->id;
+ struct uart_port *port = &sprd_port[id]->port;
+ struct reg_backup *reg_bak = &sprd_port[id]->reg_bak;
+
+ serial_out(port, SPRD_LCR, reg_bak->ctrl0);
+ serial_out(port, SPRD_CTL1, reg_bak->ctrl1);
+ serial_out(port, SPRD_CTL2, reg_bak->ctrl2);
+ serial_out(port, SPRD_CLKD0, reg_bak->clkd0);
+ serial_out(port, SPRD_CLKD1, reg_bak->clkd1);
+ serial_out(port, SPRD_IEN, reg_bak->ien);
+
+ return 0;
+}
+
+static const struct of_device_id serial_ids[] = {
+ {.compatible = "sprd,sc9836-uart",},
+ {}
+};
+
+static struct platform_driver sprd_platform_driver = {
+ .probe = sprd_probe,
+ .remove = sprd_remove,
+ .suspend = sprd_suspend,
+ .resume = sprd_resume,
+ .driver = {
+ .name = "sprd_serial",
+ .of_match_table = of_match_ptr(serial_ids),
+ },
+};
+
+static int __init sprd_serial_init(void)
+{
+ int ret = 0;
+
+ ret = uart_register_driver(&sprd_uart_driver);
+ if (ret)
+ return ret;
+
+ ret = platform_driver_register(&sprd_platform_driver);
+ if (ret)
+ uart_unregister_driver(&sprd_uart_driver);
+
+ return ret;
+}
+
+static void __exit sprd_serial_exit(void)
+{
+ platform_driver_unregister(&sprd_platform_driver);
+ uart_unregister_driver(&sprd_uart_driver);
+}
+
+module_init(sprd_serial_init);
+module_exit(sprd_serial_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Spreadtrum SoC serial driver series");
diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
index 16ad852..c0791d6 100644
--- a/include/uapi/linux/serial_core.h
+++ b/include/uapi/linux/serial_core.h
@@ -247,4 +247,7 @@
/* MESON */
#define PORT_MESON 109
+/* SPRD SERIAL */
+#define PORT_SPRD 110
+
#endif /* _UAPILINUX_SERIAL_CORE_H */
--
1.7.9.5
^ permalink raw reply related
* [PATCH v4 4/5] arm64: Add support for Spreadtrum's Sharkl64 Platform in Kconfig and defconfig
From: Chunyan Zhang @ 2014-12-04 11:34 UTC (permalink / raw)
To: gregkh, mark.rutland, arnd, gnomes, broonie, robh+dt, pawel.moll,
ijc+devicetree, galak, will.deacon, catalin.marinas, jslaby,
jason, heiko, florian.vaussard, andrew, rrichter, hytszk,
grant.likely, orsonzhai, geng.ren, zhizhou.zhang, lanqing.liu,
zhang.lyra, wei.qiao
Cc: devicetree, linux-arm-kernel, linux-kernel, sprdlinux, linux-doc,
linux-serial, linux-api, arm
In-Reply-To: <1417692860-18841-1-git-send-email-chunyan.zhang@spreadtrum.com>
From: Zhizhou Zhang <zhizhou.zhang@spreadtrum.com>
Adds support for Spreadtrum's SoC Platform in the arm64 Kconfig and
defconfig files.
Signed-off-by: Zhizhou Zhang <zhizhou.zhang@spreadtrum.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Signed-off-by: Orson Zhai <orson.zhai@spreadtrum.com>
---
arch/arm64/Kconfig | 6 ++++++
arch/arm64/configs/defconfig | 1 +
2 files changed, 7 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index ac9afde..abca2c4 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -146,6 +146,12 @@ config ARCH_THUNDER
help
This enables support for Cavium's Thunder Family of SoCs.
+config ARCH_SPRD
+ bool "Spreadtrum SoC platform"
+ depends on ARM64
+ help
+ Support for Spreadtrum ARM based SoCs
+
config ARCH_VEXPRESS
bool "ARMv8 software model (Versatile Express)"
select ARCH_REQUIRE_GPIOLIB
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 9cd37de..db39340 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -33,6 +33,7 @@ CONFIG_MODULE_UNLOAD=y
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_IOSCHED_DEADLINE is not set
CONFIG_ARCH_THUNDER=y
+CONFIG_ARCH_SPRD=y
CONFIG_ARCH_VEXPRESS=y
CONFIG_ARCH_XGENE=y
CONFIG_SMP=y
--
1.7.9.5
^ permalink raw reply related
* [PATCH v4 3/5] arm64: dts: Add support for Spreadtrum SC9836 SoC in dts and Makefile
From: Chunyan Zhang @ 2014-12-04 11:34 UTC (permalink / raw)
To: gregkh, mark.rutland, arnd, gnomes, broonie, robh+dt, pawel.moll,
ijc+devicetree, galak, will.deacon, catalin.marinas, jslaby,
jason, heiko, florian.vaussard, andrew, rrichter, hytszk,
grant.likely, orsonzhai, geng.ren, zhizhou.zhang, lanqing.liu,
zhang.lyra, wei.qiao
Cc: devicetree, linux-arm-kernel, linux-kernel, sprdlinux, linux-doc,
linux-serial, linux-api, arm
In-Reply-To: <1417692860-18841-1-git-send-email-chunyan.zhang@spreadtrum.com>
From: Zhizhou Zhang <zhizhou.zhang@spreadtrum.com>
Adds the device tree support for Spreadtrum SC9836 SoC which is based on
Sharkl64 platform.
Sharkl64 platform contains the common nodes of Spreadtrum's arm64-based SoCs.
Signed-off-by: Zhizhou Zhang <zhizhou.zhang@spreadtrum.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Signed-off-by: Orson Zhai <orson.zhai@spreadtrum.com>
---
arch/arm64/boot/dts/Makefile | 1 +
arch/arm64/boot/dts/sprd-sc9836-openphone.dts | 85 ++++++++++++++++++++
arch/arm64/boot/dts/sprd-sc9836.dtsi | 102 ++++++++++++++++++++++++
arch/arm64/boot/dts/sprd-sharkl64.dtsi | 105 +++++++++++++++++++++++++
4 files changed, 293 insertions(+)
create mode 100644 arch/arm64/boot/dts/sprd-sc9836-openphone.dts
create mode 100644 arch/arm64/boot/dts/sprd-sc9836.dtsi
create mode 100644 arch/arm64/boot/dts/sprd-sharkl64.dtsi
diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
index f8001a6..d0aff8a 100644
--- a/arch/arm64/boot/dts/Makefile
+++ b/arch/arm64/boot/dts/Makefile
@@ -1,4 +1,5 @@
dtb-$(CONFIG_ARCH_THUNDER) += thunder-88xx.dtb
+dtb-$(CONFIG_ARCH_SHARKL64) += sprd-sc9836-openphone.dtb
dtb-$(CONFIG_ARCH_VEXPRESS) += rtsm_ve-aemv8a.dtb foundation-v8.dtb
dtb-$(CONFIG_ARCH_XGENE) += apm-mustang.dtb
diff --git a/arch/arm64/boot/dts/sprd-sc9836-openphone.dts b/arch/arm64/boot/dts/sprd-sc9836-openphone.dts
new file mode 100644
index 0000000..484d714
--- /dev/null
+++ b/arch/arm64/boot/dts/sprd-sc9836-openphone.dts
@@ -0,0 +1,85 @@
+/*
+ * Spreadtrum SC9836 openphone board DTS file
+ *
+ * Copyright (C) 2014, Spreadtrum Communications Inc.
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ * a) This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * Or, alternatively,
+ *
+ * b) Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/dts-v1/;
+
+#include "sprd-sc9836.dtsi"
+
+/ {
+ model = "Spreadtrum,SC9836 Openphone Board";
+
+ compatible = "sprd,sc9836-openphone", "sprd,sc9836";
+
+ aliases {
+ serial0 = &uart0;
+ serial1 = &uart1;
+ serial2 = &uart2;
+ serial3 = &uart3;
+ };
+
+ memory@80000000 {
+ device_type = "memory";
+ reg = <0 0x80000000 0 0x20000000>;
+ };
+
+ chosen {
+ stdout-path = &uart0;
+ };
+};
+
+&uart0 {
+ status = "okay";
+};
+
+&uart1 {
+ status = "okay";
+};
+
+&uart2 {
+ status = "okay";
+};
+
+&uart3 {
+ status = "okay";
+};
diff --git a/arch/arm64/boot/dts/sprd-sc9836.dtsi b/arch/arm64/boot/dts/sprd-sc9836.dtsi
new file mode 100644
index 0000000..1abf897
--- /dev/null
+++ b/arch/arm64/boot/dts/sprd-sc9836.dtsi
@@ -0,0 +1,102 @@
+/*
+ * Spreadtrum SC9836 SoC DTS file
+ *
+ * Copyright (C) 2014, Spreadtrum Communications Inc.
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ * a) This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * Or, alternatively,
+ *
+ * b) Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "sprd-sharkl64.dtsi"
+
+/ {
+ compatible = "sprd,sc9836";
+
+ cpus {
+ #address-cells = <2>;
+ #size-cells = <0>;
+
+ cpu@0 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a53", "arm,armv8";
+ reg = <0x0 0x0>;
+ enable-method = "psci";
+ };
+ cpu@1 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a53", "arm,armv8";
+ reg = <0x0 0x1>;
+ enable-method = "psci";
+ };
+ cpu@2 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a53", "arm,armv8";
+ reg = <0x0 0x2>;
+ enable-method = "psci";
+ };
+ cpu@3 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a53", "arm,armv8";
+ reg = <0x0 0x3>;
+ enable-method = "psci";
+ };
+ };
+
+ gic: interrupt-controller@12001000 {
+ compatible = "arm,cortex-a15-gic", "arm,cortex-a9-gic";
+ #interrupt-cells = <3>;
+ interrupt-controller;
+ reg = <0 0x12001000 0 0x1000>,
+ <0 0x12002000 0 0x2000>,
+ <0 0x12004000 0 0x2000>,
+ <0 0x12006000 0 0x2000>;
+ };
+
+ psci {
+ compatible = "arm,psci-0.2", "arm,psci";
+ method = "smc";
+ };
+
+ timer {
+ compatible = "arm,armv8-timer";
+ interrupts = <1 13 0xff01>,
+ <1 14 0xff01>,
+ <1 11 0xff01>,
+ <1 10 0xff01>;
+ };
+};
diff --git a/arch/arm64/boot/dts/sprd-sharkl64.dtsi b/arch/arm64/boot/dts/sprd-sharkl64.dtsi
new file mode 100644
index 0000000..d9ecfe9
--- /dev/null
+++ b/arch/arm64/boot/dts/sprd-sharkl64.dtsi
@@ -0,0 +1,105 @@
+/*
+ * Spreadtrum Sharkl64 platform DTS file
+ *
+ * Copyright (C) 2014, Spreadtrum Communications Inc.
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ * a) This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * Or, alternatively,
+ *
+ * b) Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/ {
+ interrupt-parent = <&gic>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ soc {
+ compatible = "simple-bus";
+ reg = <0x0 0x0 0x0 0x80000000>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ ap_apb: apb@70000000 {
+ compatible = "simple-bus";
+ reg = <0x0 0x70000000 0x0 0x10000000>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ uart0: serial@70000000 {
+ compatible = "sprd,sc9836-uart";
+ reg = <0 0x70000000 0 0x100>;
+ interrupts = <0 2 0xf04>;
+ clocks = <&clk26mhz>;
+ status = "disabled";
+ };
+
+ uart1: serial@70100000 {
+ compatible = "sprd,sc9836-uart";
+ reg = <0 0x70100000 0 0x100>;
+ interrupts = <0 3 0xf04>;
+ clocks = <&clk26mhz>;
+ status = "disabled";
+ };
+
+ uart2: serial@70200000 {
+ compatible = "sprd,sc9836-uart";
+ reg = <0 0x70200000 0 0x100>;
+ interrupts = <0 2 0xf04>;
+ clocks = <&clk26mhz>;
+ status = "disabled";
+ };
+
+ uart3: serial@70300000 {
+ compatible = "sprd,sc9836-uart";
+ reg = <0 0x70300000 0 0x100>;
+ interrupts = <0 3 0xf04>;
+ clocks = <&clk26mhz>;
+ status = "disabled";
+ };
+ };
+ };
+
+ clocks {
+ clk26mhz: clk26mhz {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <26000000>;
+ };
+ };
+};
--
1.7.9.5
^ permalink raw reply related
* [PATCH v4 2/5] Documentation: DT: Add bindings for Spreadtrum SoC Platform
From: Chunyan Zhang @ 2014-12-04 11:34 UTC (permalink / raw)
To: gregkh, mark.rutland, arnd, gnomes, broonie, robh+dt, pawel.moll,
ijc+devicetree, galak, will.deacon, catalin.marinas, jslaby,
jason, heiko, florian.vaussard, andrew, rrichter, hytszk,
grant.likely, orsonzhai, geng.ren, zhizhou.zhang, lanqing.liu,
zhang.lyra, wei.qiao
Cc: devicetree, linux-arm-kernel, linux-kernel, sprdlinux, linux-doc,
linux-serial, linux-api, arm
In-Reply-To: <1417692860-18841-1-git-send-email-chunyan.zhang@spreadtrum.com>
Adds Spreadtrum's prefix "sprd" to vendor-prefixes file.
Adds the devicetree binding documentations for Spreadtrum's sc9836-uart
and SC9836 SoC based on the Sharkl64 Platform which is a 64-bit SoC
Platform of Spreadtrum.
Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Signed-off-by: Orson Zhai <orson.zhai@spreadtrum.com>
---
Documentation/devicetree/bindings/arm/sprd.txt | 11 +++++++++++
.../devicetree/bindings/serial/sprd-uart.txt | 9 +++++++++
.../devicetree/bindings/vendor-prefixes.txt | 1 +
3 files changed, 21 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/sprd.txt
create mode 100644 Documentation/devicetree/bindings/serial/sprd-uart.txt
diff --git a/Documentation/devicetree/bindings/arm/sprd.txt b/Documentation/devicetree/bindings/arm/sprd.txt
new file mode 100644
index 0000000..31a629d
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/sprd.txt
@@ -0,0 +1,11 @@
+Spreadtrum SoC Platforms Device Tree Bindings
+----------------------------------------------------
+
+Sharkl64 is a Spreadtrum's SoC Platform which is based
+on ARM 64-bit processor.
+
+SC9836 openphone board with SC9836 SoC based on the
+Sharkl64 Platform shall have the following properties.
+
+Required root node properties:
+ - compatible = "sprd,sc9836-openphone", "sprd,sc9836";
diff --git a/Documentation/devicetree/bindings/serial/sprd-uart.txt b/Documentation/devicetree/bindings/serial/sprd-uart.txt
new file mode 100644
index 0000000..9000e2e
--- /dev/null
+++ b/Documentation/devicetree/bindings/serial/sprd-uart.txt
@@ -0,0 +1,9 @@
+* Spreadtrum serial UART
+
+Required properties:
+- compatible: must be "sprd,sc9836-uart"
+- reg: offset and length of the register set for the device
+- interrupts: exactly one interrupt specifier
+
+Optional properties:
+- clocks: phandles to input clocks.
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 723999d..ce99ecdfb 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -142,6 +142,7 @@ snps Synopsys, Inc.
solidrun SolidRun
sony Sony Corporation
spansion Spansion Inc.
+sprd Spreadtrum Communications Inc.
st STMicroelectronics
ste ST-Ericsson
stericsson ST-Ericsson
--
1.7.9.5
^ permalink raw reply related
* [PATCH v4 1/5] Documentation: DT: Renamed of-serial.txt to 8250.txt
From: Chunyan Zhang @ 2014-12-04 11:34 UTC (permalink / raw)
To: gregkh, mark.rutland, arnd, gnomes, broonie, robh+dt, pawel.moll,
ijc+devicetree, galak, will.deacon, catalin.marinas, jslaby,
jason, heiko, florian.vaussard, andrew, rrichter, hytszk,
grant.likely, orsonzhai, geng.ren, zhizhou.zhang, lanqing.liu,
zhang.lyra, wei.qiao
Cc: devicetree, linux-arm-kernel, linux-kernel, sprdlinux, linux-doc,
linux-serial, linux-api, arm
In-Reply-To: <1417692860-18841-1-git-send-email-chunyan.zhang@spreadtrum.com>
The file of-serial.txt was only for 8250 compatible UART implementations,
so renamed it to 8250.txt to avoid confusing other persons.
This is suggested by Arnd, see:
http://lists.infradead.org/pipermail/linux-arm-kernel/2014-September/291455.html
Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
---
.../bindings/serial/{of-serial.txt => 8250.txt} | 0
1 file changed, 0 insertions(+), 0 deletions(-)
rename Documentation/devicetree/bindings/serial/{of-serial.txt => 8250.txt} (100%)
diff --git a/Documentation/devicetree/bindings/serial/of-serial.txt b/Documentation/devicetree/bindings/serial/8250.txt
similarity index 100%
rename from Documentation/devicetree/bindings/serial/of-serial.txt
rename to Documentation/devicetree/bindings/serial/8250.txt
--
1.7.9.5
^ permalink raw reply
* [PATCH v4 0/5] Add Spreadtrum Sharkl64 Platform support
From: Chunyan Zhang @ 2014-12-04 11:34 UTC (permalink / raw)
To: gregkh, mark.rutland, arnd, gnomes, broonie, robh+dt, pawel.moll,
ijc+devicetree, galak, will.deacon, catalin.marinas, jslaby,
jason, heiko, florian.vaussard, andrew, rrichter, hytszk,
grant.likely, orsonzhai, geng.ren, zhizhou.zhang, lanqing.liu,
zhang.lyra, wei.qiao
Cc: devicetree, linux-arm-kernel, linux-kernel, sprdlinux, linux-doc,
linux-serial, linux-api, arm
In-Reply-To: <sc9836v4>
Spreadtrum is a rapid growing chip vendor providing smart phone total solutions.
Sharkl64 Platform is nominated as a SoC infrastructure that supports 4G/3G/2G
standards based on ARMv8 multiple core architecture.Now we have only one
SoC(SC9836) based on this Platform in developing.
This patchset adds Sharkl64 support in arm64 device tree and the serial driver
of SC9836-UART.
This patchset also has patches which address "sprd" prefix and DT compatible
strings for nodes which appear un-documented.
This version code was tesed both on Fast Mode and sc9836-fpga board.
We use the latest boot-wrapper-aarch64 as the bootloader.
Changes from v3:
* Addressed review comments:
- Added the description of clock property for sc9836-uart
- Revised the size of GICC to be 8KiB
- Added another compatible string for psci-0.1
- Removed the clock-frequency property of timer in DT
- Removed ARCH_SHARKL64, just left ARCH_SPRD only
- sprd_serial.c: Removed .owner of platform_driver.driver
- sprd_serial.c: Removed all usages of unlikely
- sprd_serial.c: Used the .port member of sprd_port instead of the cast
- sprd_serial.c: Used dynamic allocation for major/minor device id
- sprd_serial.c: Added a timeout and a cpu_relax for clearing rx/tx fifo
- sprd_serial.c: clear CMSPAR in termios->c_cflag
- sprd_serial.c: Set the resulting baud back into the termios
- sprd_serial.c: Implemented a shared interrupt handler
Changes from v2:
* Addressed review comments:
- Added a specific compitible string 'sc9836-uart' for the serial
- Added a full serial driver
- Added the property 'clock-frequency' for timer node in dtsi.
- Replaceed the old macro prefix 'UART_' with 'SPRD_' in the
Spreadtrum serial driver code.
* Revised the name of SoC and board from 'sharkl3' to 'sc9836'
* Used dual-license for DTS files
* Added a menuconfig 'ARCH_SPRD' in arch/arm64/Kconfig
Changes from v1:
* Addressed review comments:
- Added "sprd" prefix to vendor-prefixes.txt
- Created serial/sprd-serial.txt and remove the properties for serial-sprd
from of-serial.txt to it.
- Renamed of-serial.txt to 8250.txt according to Arnd's review comments
- Splited and revised .dts for Sharkl64 Platform
- Changed to PSCI method for cpu power management
- Revised Kconfig Makefile to match the alphabetical ordering
- Renamed serial-sprd-earlycon.c to serial-sprd.c
Chunyan Zhang (3):
Documentation: DT: Renamed of-serial.txt to 8250.txt
Documentation: DT: Add bindings for Spreadtrum SoC Platform
tty/serial: Add Spreadtrum sc9836-uart driver support
Zhizhou Zhang (2):
arm64: dts: Add support for Spreadtrum SC9836 SoC in dts and Makefile
arm64: Add support for Spreadtrum's Sharkl64 Platform in Kconfig and
defconfig
Documentation/devicetree/bindings/arm/sprd.txt | 11 +
.../bindings/serial/{of-serial.txt => 8250.txt} | 0
.../devicetree/bindings/serial/sprd-uart.txt | 9 +
.../devicetree/bindings/vendor-prefixes.txt | 1 +
arch/arm64/Kconfig | 6 +
arch/arm64/boot/dts/Makefile | 1 +
arch/arm64/boot/dts/sprd-sc9836-openphone.dts | 85 +++
arch/arm64/boot/dts/sprd-sc9836.dtsi | 102 +++
arch/arm64/boot/dts/sprd-sharkl64.dtsi | 105 +++
arch/arm64/configs/defconfig | 1 +
drivers/tty/serial/Kconfig | 18 +
drivers/tty/serial/Makefile | 1 +
drivers/tty/serial/sprd_serial.c | 761 ++++++++++++++++++++
include/uapi/linux/serial_core.h | 3 +
14 files changed, 1104 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/sprd.txt
rename Documentation/devicetree/bindings/serial/{of-serial.txt => 8250.txt} (100%)
create mode 100644 Documentation/devicetree/bindings/serial/sprd-uart.txt
create mode 100644 arch/arm64/boot/dts/sprd-sc9836-openphone.dts
create mode 100644 arch/arm64/boot/dts/sprd-sc9836.dtsi
create mode 100644 arch/arm64/boot/dts/sprd-sharkl64.dtsi
create mode 100644 drivers/tty/serial/sprd_serial.c
--
1.7.9.5
^ permalink raw reply
* Re: [PATCH] uapi: fix to export linux/vm_sockets.h
From: Masahiro Yamada @ 2014-12-04 8:15 UTC (permalink / raw)
To: linux-kernel-u79uwXL29TY76Z2rM5mHXA
Cc: netdev-u79uwXL29TY76Z2rM5mHXA, Stephen Hemminger, David S. Miller,
Greg Kroah-Hartman, Alexei Starovoitov, Piotr Krol, Andrew Morton,
Sakari Ailus, linux-api-u79uwXL29TY76Z2rM5mHXA
In-Reply-To: <1417396577-32499-1-git-send-email-yamada.m-NAum8xwdG0+S7A1Ibl2khg@public.gmane.org>
Hi.
Is there a chance to fix this by the Linux 3.18 release?
Thanks.
On Mon, 1 Dec 2014 10:16:17 +0900
Masahiro Yamada <yamada.m-NAum8xwdG0+S7A1Ibl2khg@public.gmane.org> wrote:
> A typo "header=y" was introduced by commit 7071cf7fc435
> (uapi: add missing network related headers to kbuild).
>
> Signed-off-by: Masahiro Yamada <yamada.m-NAum8xwdG0+S7A1Ibl2khg@public.gmane.org>
> Cc: Stephen Hemminger <stephen-OTpzqLSitTUnbdJkjeBofR2eb7JE58TQ@public.gmane.org>
> ---
>
> include/uapi/linux/Kbuild | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
> index 4c94f31..8523f9b 100644
> --- a/include/uapi/linux/Kbuild
> +++ b/include/uapi/linux/Kbuild
> @@ -427,7 +427,7 @@ header-y += virtio_net.h
> header-y += virtio_pci.h
> header-y += virtio_ring.h
> header-y += virtio_rng.h
> -header=y += vm_sockets.h
> +header-y += vm_sockets.h
> header-y += vt.h
> header-y += wait.h
> header-y += wanrouter.h
> --
> 1.9.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
^ permalink raw reply
* Re: [PATCH v9 0/8] TPM 2.0 support
From: Jarkko Sakkinen @ 2014-12-04 5:57 UTC (permalink / raw)
To: Peter Huewe, Ashley Lai, Marcel Selhorst
Cc: tpmdd-devel, linux-kernel, josh.triplett, christophe.ricard,
jason.gunthorpe, linux-api, trousers-tech
In-Reply-To: <1417672167-3489-1-git-send-email-jarkko.sakkinen@linux.intel.com>
Please ignore this one. Sent another one with v9 prefixes. Sorry!
/Jarkko
On Thu, Dec 04, 2014 at 07:49:19AM +0200, Jarkko Sakkinen wrote:
> This patch set enables TPM2 protocol and provides drivers for FIFO and
> CRB interfaces. This patch set does not export any sysfs attributes for
> TPM 2.0 because existing sysfs attributes have three non-trivial issues:
>
> - They are associated with the platform device instead of character
> device.
> - They are are not trivial key-value pairs but contain text that is
> not easily parsed by a computer.
> - Raciness as described in
> http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/
>
> This is too big effort to be included into this patch set and requires
> more discussion.
>
> v2:
> - Improved struct tpm_chip life-cycle by taking advantage of devres
> API.
> - Refined sysfs attributes as simple key-values thereby not repeating
> mistakes in TPM1 sysfs attributes.
> - Documented functions in tpm-chip.c and tpm2-cmd.c.
> - Documented sysfs attributes.
>
> v3:
> - Lots of fixes in calling order in device drivers (thanks to Jason
> Gunthorpe for pointing these out!).
> - Attach sysfs attributes to the misc device because it represents
> TPM device to the user space.
>
> v4:
> - Disable sysfs attibutes for TPM 2.0 for until we can sort out the
> best approach for them.
> - Fixed all the style issues found with checkpatch.pl.
>
> v5:
> - missing EXPORT_SYMBOL_GPL()
> - own class for TPM devices used for TPM 2.0 devices and onwards.
>
> v6:
> - Non-racy initialization for sysfs attributes using struct device's
> groups field.
> - The class 'tpm' is used now for all TPM devices. For the first device
> node major MISC_MAJOR and minor TPM_MINOR is used in order to retain
> backwards compatability.
>
> v7:
> - Release device number and free struct tpm_chip memory inside
> tpm_dev_release callback.
> - Moved code from tpm-interface.c and tpm_dev.c to tpm-chip.c.
>
> v8:
> - Cleaned up unneeded cast from tpm_transmit_cmd().
> - Cleaned up redundant PPI_VERSION_LEN constant from tpm_ppi.c.
> - Fixed tpm_tis to use tpm2_calc_ordinal_duration() for TPM2 devices.
> - tpm_crb: in crb_recv, check that count can hold the TPM header at
> minimum.
> - tpm_crb: add enumerations for bit flags in start and cancel fields
> of the control area.
> - tpm_crb: use ioremap() for command and response buffer because
> they might be anywhere.
> - tpm_crb: use IO access functions for reading ioremapped buffers
> because using direct pointers is not portable.
> - tpm_crb: only apply ACPI start if start method reported by the
> TPM2 ACPI table allows it.
> - In tpm2_pcr_read() just calculate index and bit and get rid of
> hacky loop.
> - Do not add sysfs attributes for TPM 2.0 devices.
>
> v9:
> - Fixed compilation issues in v8 (sorry for not using the correct
> tree).
> - Just do "return tpm_chip_register();" instead of copying return
> value to a variable.
> - Removed unused tpm2_startup().
> - In the CRB driver ACPI TPM2 table could contain platform specific
> and therefore inequality test does not work. Changed check whether
> buffer size is less than mandatory fields in the ACPI TPM2 table.
>
> Jarkko Sakkinen (7):
> tpm: merge duplicate transmit_cmd() functions
> tpm: two-phase chip management functions
> tpm: fix raciness of PPI interface lookup
> tpm: rename chip->dev to chip->pdev
> tpm: device class for tpm
> tpm: TPM 2.0 baseline support
> tpm: TPM 2.0 CRB Interface
>
> Will Arthur (1):
> tpm: TPM 2.0 FIFO Interface
>
> drivers/char/tpm/Kconfig | 9 +
> drivers/char/tpm/Makefile | 3 +-
> drivers/char/tpm/tpm-chip.c | 251 +++++++++++++++++
> drivers/char/tpm/tpm-dev.c | 42 +--
> drivers/char/tpm/tpm-interface.c | 261 ++++++-----------
> drivers/char/tpm/tpm-sysfs.c | 29 +-
> drivers/char/tpm/tpm.h | 107 +++++--
> drivers/char/tpm/tpm2-cmd.c | 542 ++++++++++++++++++++++++++++++++++++
> drivers/char/tpm/tpm_atmel.c | 25 +-
> drivers/char/tpm/tpm_crb.c | 356 +++++++++++++++++++++++
> drivers/char/tpm/tpm_i2c_atmel.c | 55 ++--
> drivers/char/tpm/tpm_i2c_infineon.c | 43 +--
> drivers/char/tpm/tpm_i2c_nuvoton.c | 71 ++---
> drivers/char/tpm/tpm_i2c_stm_st33.c | 28 +-
> drivers/char/tpm/tpm_ibmvtpm.c | 17 +-
> drivers/char/tpm/tpm_infineon.c | 51 ++--
> drivers/char/tpm/tpm_nsc.c | 34 ++-
> drivers/char/tpm/tpm_ppi.c | 137 +++++----
> drivers/char/tpm/tpm_tis.c | 192 ++++++++-----
> drivers/char/tpm/xen-tpmfront.c | 14 +-
> 20 files changed, 1689 insertions(+), 578 deletions(-)
> create mode 100644 drivers/char/tpm/tpm-chip.c
> create mode 100644 drivers/char/tpm/tpm2-cmd.c
> create mode 100644 drivers/char/tpm/tpm_crb.c
>
> --
> 2.1.0
>
^ permalink raw reply
* [PATCH v9 8/8] tpm: TPM 2.0 FIFO Interface
From: Jarkko Sakkinen @ 2014-12-04 5:55 UTC (permalink / raw)
To: Peter Huewe, Ashley Lai, Marcel Selhorst
Cc: tpmdd-devel, linux-kernel, josh.triplett, christophe.ricard,
jason.gunthorpe, linux-api, trousers-tech, Will Arthur,
Jarkko Sakkinen
In-Reply-To: <1417672518-4530-1-git-send-email-jarkko.sakkinen@linux.intel.com>
From: Will Arthur <will.c.arthur@intel.com>
Detect TPM 2.0 by using the extended STS (STS3) register. For TPM 2.0,
instead of calling tpm_get_timeouts(), assign duration and timeout
values defined in the TPM 2.0 PTP specification.
Signed-off-by: Will Arthur <will.c.arthur@intel.com>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
drivers/char/tpm/tpm_tis.c | 80 ++++++++++++++++++++++++++++++++++++++--------
1 file changed, 67 insertions(+), 13 deletions(-)
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 89e1abb..71cbb2d 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2005, 2006 IBM Corporation
+ * Copyright (C) 2014 Intel Corporation
*
* Authors:
* Leendert van Doorn <leendert@watson.ibm.com>
@@ -44,6 +45,10 @@ enum tis_status {
TPM_STS_DATA_EXPECT = 0x08,
};
+enum tis_status3 {
+ TPM_STS3_TPM2_FAM = 0x04,
+};
+
enum tis_int_flags {
TPM_GLOBAL_INT_ENABLE = 0x80000000,
TPM_INTF_BURST_COUNT_STATIC = 0x100,
@@ -70,6 +75,7 @@ enum tis_defaults {
#define TPM_INT_STATUS(l) (0x0010 | ((l) << 12))
#define TPM_INTF_CAPS(l) (0x0014 | ((l) << 12))
#define TPM_STS(l) (0x0018 | ((l) << 12))
+#define TPM_STS3(l) (0x001b | ((l) << 12))
#define TPM_DATA_FIFO(l) (0x0024 | ((l) << 12))
#define TPM_DID_VID(l) (0x0F00 | ((l) << 12))
@@ -363,6 +369,7 @@ static int tpm_tis_send_main(struct tpm_chip *chip, u8 *buf, size_t len)
{
int rc;
u32 ordinal;
+ unsigned long dur;
rc = tpm_tis_send_data(chip, buf, len);
if (rc < 0)
@@ -374,9 +381,14 @@ static int tpm_tis_send_main(struct tpm_chip *chip, u8 *buf, size_t len)
if (chip->vendor.irq) {
ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
+
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ dur = tpm2_calc_ordinal_duration(chip, ordinal);
+ else
+ dur = tpm_calc_ordinal_duration(chip, ordinal);
+
if (wait_for_tpm_stat
- (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
- tpm_calc_ordinal_duration(chip, ordinal),
+ (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID, dur,
&chip->vendor.read_queue, false) < 0) {
rc = -ETIME;
goto out_err;
@@ -588,6 +600,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
int rc, i, irq_s, irq_e, probe;
struct tpm_chip *chip;
struct priv_data *priv;
+ u8 sts3;
priv = devm_kzalloc(dev, sizeof(struct priv_data), GFP_KERNEL);
if (priv == NULL)
@@ -604,11 +617,28 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
if (!chip->vendor.iobase)
return -EIO;
+ sts3 = ioread8(chip->vendor.iobase + TPM_STS3(1));
+ if ((sts3 & TPM_STS3_TPM2_FAM) == TPM_STS3_TPM2_FAM)
+ chip->flags = TPM_CHIP_FLAG_TPM2;
+
/* Default timeouts */
- chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
- chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
- chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
- chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+ if (chip->flags & TPM_CHIP_FLAG_TPM2) {
+ chip->vendor.timeout_a = usecs_to_jiffies(TPM2_TIMEOUT_A);
+ chip->vendor.timeout_b = usecs_to_jiffies(TPM2_TIMEOUT_B);
+ chip->vendor.timeout_c = usecs_to_jiffies(TPM2_TIMEOUT_C);
+ chip->vendor.timeout_d = usecs_to_jiffies(TPM2_TIMEOUT_D);
+ chip->vendor.duration[TPM_SHORT] =
+ usecs_to_jiffies(TPM2_DURATION_SHORT);
+ chip->vendor.duration[TPM_MEDIUM] =
+ usecs_to_jiffies(TPM2_DURATION_MEDIUM);
+ chip->vendor.duration[TPM_LONG] =
+ usecs_to_jiffies(TPM2_DURATION_LONG);
+ } else {
+ chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+ chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
+ chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+ chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
+ }
if (wait_startup(chip, 0) != 0) {
rc = -ENODEV;
@@ -623,8 +653,8 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
chip->vendor.manufacturer_id = vendor;
- dev_info(dev,
- "1.2 TPM (device-id 0x%X, rev-id %d)\n",
+ dev_info(dev, "%s TPM (device-id 0x%X, rev-id %d)\n",
+ (chip->flags & TPM_CHIP_FLAG_TPM2) ? "2.0" : "1.2",
vendor >> 16, ioread8(chip->vendor.iobase + TPM_RID(0)));
if (!itpm) {
@@ -665,6 +695,23 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
if (intfcaps & TPM_INTF_DATA_AVAIL_INT)
dev_dbg(dev, "\tData Avail Int Support\n");
+ /* get the timeouts before testing for irqs */
+ if (!(chip->flags & TPM_CHIP_FLAG_TPM2) && tpm_get_timeouts(chip)) {
+ dev_err(dev, "Could not get TPM timeouts and durations\n");
+ rc = -ENODEV;
+ goto out_err;
+ }
+
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ rc = tpm2_do_selftest(chip);
+ else
+ rc = tpm_do_selftest(chip);
+ if (rc) {
+ dev_err(dev, "TPM self test failed\n");
+ rc = -ENODEV;
+ goto out_err;
+ }
+
/* INTERRUPT Setup */
init_waitqueue_head(&chip->vendor.read_queue);
init_waitqueue_head(&chip->vendor.int_queue);
@@ -720,7 +767,10 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
chip->vendor.probed_irq = 0;
/* Generate Interrupts */
- tpm_gen_interrupt(chip);
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ tpm2_gen_interrupt(chip);
+ else
+ tpm_gen_interrupt(chip);
chip->vendor.irq = chip->vendor.probed_irq;
@@ -808,14 +858,18 @@ static void tpm_tis_reenable_interrupts(struct tpm_chip *chip)
static int tpm_tis_resume(struct device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(dev);
- int ret;
+ int ret = 0;
if (chip->vendor.irq)
tpm_tis_reenable_interrupts(chip);
- ret = tpm_pm_resume(dev);
- if (!ret)
- tpm_do_selftest(chip);
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ tpm2_do_selftest(chip);
+ else {
+ ret = tpm_pm_resume(dev);
+ if (!ret)
+ tpm_do_selftest(chip);
+ }
return ret;
}
--
2.1.0
^ permalink raw reply related
* [PATCH v9 7/8] tpm: TPM 2.0 CRB Interface
From: Jarkko Sakkinen @ 2014-12-04 5:55 UTC (permalink / raw)
To: Peter Huewe, Ashley Lai, Marcel Selhorst
Cc: tpmdd-devel, linux-kernel, josh.triplett, christophe.ricard,
jason.gunthorpe, linux-api, trousers-tech, Jarkko Sakkinen
In-Reply-To: <1417672518-4530-1-git-send-email-jarkko.sakkinen@linux.intel.com>
tpm_crb is a driver for TPM 2.0 Command Response Buffer (CRB) Interface
as defined in PC Client Platform TPM Profile (PTP) Specification.
Only polling and single locality is supported as these are the limitations
of the available hardware, Platform Trust Techonlogy (PTT) in Haswell
CPUs.
The driver always applies CRB with ACPI start because PTT reports using
only ACPI start as start method but as a result of my testing it requires
also CRB start.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
drivers/char/tpm/Kconfig | 9 ++
drivers/char/tpm/Makefile | 1 +
drivers/char/tpm/tpm_crb.c | 356 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 366 insertions(+)
create mode 100644 drivers/char/tpm/tpm_crb.c
diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index 3d0873b..9d4e375 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -122,4 +122,13 @@ config TCG_XEN
To compile this driver as a module, choose M here; the module
will be called xen-tpmfront.
+config TCG_CRB
+ tristate "TPM 2.0 CRB Interface"
+ depends on X86 && ACPI
+ ---help---
+ If you have a TPM security chip that is compliant with the
+ TCG CRB 2.0 TPM specification say Yes and it will be accessible
+ from within Linux. To compile this driver as a module, choose
+ M here; the module will be called tpm_crb.
+
endif # TCG_TPM
diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
index 88848ed..990cf18 100644
--- a/drivers/char/tpm/Makefile
+++ b/drivers/char/tpm/Makefile
@@ -22,3 +22,4 @@ obj-$(CONFIG_TCG_INFINEON) += tpm_infineon.o
obj-$(CONFIG_TCG_IBMVTPM) += tpm_ibmvtpm.o
obj-$(CONFIG_TCG_TIS_I2C_ST33) += tpm_i2c_stm_st33.o
obj-$(CONFIG_TCG_XEN) += xen-tpmfront.o
+obj-$(CONFIG_TCG_CRB) += tpm_crb.o
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
new file mode 100644
index 0000000..eb78f93
--- /dev/null
+++ b/drivers/char/tpm/tpm_crb.c
@@ -0,0 +1,356 @@
+/*
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Authors:
+ * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
+ *
+ * Maintained by: <tpmdd-devel@lists.sourceforge.net>
+ *
+ * This device driver implements the TPM interface as defined in
+ * the TCG CRB 2.0 TPM specification.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include <linux/acpi.h>
+#include <linux/highmem.h>
+#include <linux/rculist.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include "tpm.h"
+
+#define ACPI_SIG_TPM2 "TPM2"
+
+static const u8 CRB_ACPI_START_UUID[] = {
+ /* 0000 */ 0xAB, 0x6C, 0xBF, 0x6B, 0x63, 0x54, 0x14, 0x47,
+ /* 0008 */ 0xB7, 0xCD, 0xF0, 0x20, 0x3C, 0x03, 0x68, 0xD4
+};
+
+enum crb_defaults {
+ CRB_ACPI_START_REVISION_ID = 1,
+ CRB_ACPI_START_INDEX = 1,
+};
+
+enum crb_start_method {
+ CRB_SM_ACPI_START = 2,
+ CRB_SM_CRB = 7,
+ CRB_SM_CRB_WITH_ACPI_START = 8,
+};
+
+struct acpi_tpm2 {
+ struct acpi_table_header hdr;
+ u16 platform_class;
+ u16 reserved;
+ u64 control_area_pa;
+ u32 start_method;
+} __packed;
+
+enum crb_ca_request {
+ CRB_CA_REQ_GO_IDLE = BIT(0),
+ CRB_CA_REQ_CMD_READY = BIT(1),
+};
+
+enum crb_ca_status {
+ CRB_CA_STS_ERROR = BIT(0),
+ CRB_CA_STS_TPM_IDLE = BIT(1),
+};
+
+enum crb_start {
+ CRB_START_INVOKE = BIT(0),
+};
+
+enum crb_cancel {
+ CRB_CANCEL_INVOKE = BIT(0),
+};
+
+struct crb_control_area {
+ u32 req;
+ u32 sts;
+ u32 cancel;
+ u32 start;
+ u32 int_enable;
+ u32 int_sts;
+ u32 cmd_size;
+ u64 cmd_pa;
+ u32 rsp_size;
+ u64 rsp_pa;
+} __packed;
+
+enum crb_status {
+ CRB_STS_COMPLETE = BIT(0),
+};
+
+enum crb_flags {
+ CRB_FL_ACPI_START = BIT(0),
+ CRB_FL_CRB_START = BIT(1),
+};
+
+struct crb_priv {
+ unsigned int flags;
+ struct crb_control_area *cca;
+ u8 *cmd;
+ u8 *rsp;
+};
+
+#ifdef CONFIG_PM_SLEEP
+int crb_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int crb_resume(struct device *dev)
+{
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+
+ (void) tpm2_do_selftest(chip);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(crb_pm, crb_suspend, crb_resume);
+
+static u8 crb_status(struct tpm_chip *chip)
+{
+ struct crb_priv *priv = chip->vendor.priv;
+ u8 sts = 0;
+
+ if ((le32_to_cpu(ioread32(&priv->cca->start)) & CRB_START_INVOKE) !=
+ CRB_START_INVOKE)
+ sts |= CRB_STS_COMPLETE;
+
+ return sts;
+}
+
+static int crb_recv(struct tpm_chip *chip, u8 *buf, size_t count)
+{
+ struct crb_priv *priv = chip->vendor.priv;
+ unsigned int expected;
+
+ /* sanity check */
+ if (count < 6)
+ return -EIO;
+
+ if (le32_to_cpu(ioread32(&priv->cca->sts)) & CRB_CA_STS_ERROR)
+ return -EIO;
+
+ memcpy(buf, priv->rsp, 6);
+ expected = be32_to_cpup((__be32 *) &buf[2]);
+
+ if (expected > count)
+ return -EIO;
+
+ memcpy(&buf[6], &priv->rsp[6], expected - 6);
+
+ return expected;
+}
+
+static int crb_do_acpi_start(struct tpm_chip *chip)
+{
+ union acpi_object *obj;
+ int rc;
+
+ obj = acpi_evaluate_dsm(chip->acpi_dev_handle,
+ CRB_ACPI_START_UUID,
+ CRB_ACPI_START_REVISION_ID,
+ CRB_ACPI_START_INDEX,
+ NULL);
+ if (!obj)
+ return -ENXIO;
+ rc = obj->integer.value == 0 ? 0 : -ENXIO;
+ ACPI_FREE(obj);
+ return rc;
+}
+
+static int crb_send(struct tpm_chip *chip, u8 *buf, size_t len)
+{
+ struct crb_priv *priv = chip->vendor.priv;
+ int rc = 0;
+
+ if (len > le32_to_cpu(ioread32(&priv->cca->cmd_size))) {
+ dev_err(&chip->dev,
+ "invalid command count value %x %zx\n",
+ (unsigned int) len,
+ (size_t) le32_to_cpu(ioread32(&priv->cca->cmd_size)));
+ return -E2BIG;
+ }
+
+ memcpy(priv->cmd, buf, len);
+
+ /* Make sure that cmd is populated before issuing start. */
+ wmb();
+
+ if (priv->flags & CRB_FL_CRB_START)
+ iowrite32(cpu_to_le32(CRB_START_INVOKE), &priv->cca->start);
+
+ if (priv->flags & CRB_FL_ACPI_START)
+ rc = crb_do_acpi_start(chip);
+
+ return rc;
+}
+
+static void crb_cancel(struct tpm_chip *chip)
+{
+ struct crb_priv *priv = chip->vendor.priv;
+
+ iowrite32(cpu_to_le32(CRB_CANCEL_INVOKE), &priv->cca->cancel);
+
+ /* Make sure that cmd is populated before issuing cancel. */
+ wmb();
+
+ if ((priv->flags & CRB_FL_ACPI_START) && crb_do_acpi_start(chip))
+ dev_err(&chip->dev, "ACPI Start failed\n");
+
+ iowrite32(0, &priv->cca->cancel);
+}
+
+static bool crb_req_canceled(struct tpm_chip *chip, u8 status)
+{
+ struct crb_priv *priv = chip->vendor.priv;
+
+ return (le32_to_cpu(priv->cca->cancel) & CRB_CANCEL_INVOKE) ==
+ CRB_CANCEL_INVOKE;
+}
+
+static const struct tpm_class_ops tpm_crb = {
+ .status = crb_status,
+ .recv = crb_recv,
+ .send = crb_send,
+ .cancel = crb_cancel,
+ .req_canceled = crb_req_canceled,
+ .req_complete_mask = CRB_STS_COMPLETE,
+ .req_complete_val = CRB_STS_COMPLETE,
+};
+
+static int crb_acpi_add(struct acpi_device *device)
+{
+ struct tpm_chip *chip;
+ struct acpi_tpm2 *buf;
+ struct crb_priv *priv;
+ struct device *dev = &device->dev;
+ acpi_status status;
+ u32 sm;
+ u64 pa;
+ int rc;
+
+ chip = tpmm_chip_alloc(dev, &tpm_crb);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
+
+ chip->flags = TPM_CHIP_FLAG_TPM2;
+
+ status = acpi_get_table(ACPI_SIG_TPM2, 1,
+ (struct acpi_table_header **) &buf);
+ if (ACPI_FAILURE(status)) {
+ dev_err(dev, "failed to get TPM2 ACPI table\n");
+ return -ENODEV;
+ }
+
+ if (buf->hdr.length < sizeof(struct acpi_tpm2)) {
+ dev_err(dev, "TPM2 ACPI table has wrong size");
+ return -EINVAL;
+ }
+
+ priv = (struct crb_priv *) devm_kzalloc(dev, sizeof(struct crb_priv),
+ GFP_KERNEL);
+ if (!priv) {
+ dev_err(dev, "failed to devm_kzalloc for private data\n");
+ return -ENOMEM;
+ }
+
+ sm = le32_to_cpu(buf->start_method);
+
+ /* The reason for the extra quirk is that the PTT in 4th Gen Core CPUs
+ * report only ACPI start but in practice seems to require both
+ * ACPI start and CRB start.
+ */
+ if (sm == CRB_SM_CRB || sm == CRB_SM_CRB_WITH_ACPI_START ||
+ !strcmp(acpi_device_hid(device), "MSFT0101"))
+ priv->flags |= CRB_FL_CRB_START;
+
+ if (sm == CRB_SM_ACPI_START || sm == CRB_SM_CRB_WITH_ACPI_START)
+ priv->flags |= CRB_FL_ACPI_START;
+
+ priv->cca = (struct crb_control_area *)
+ devm_ioremap_nocache(dev, buf->control_area_pa, 0x1000);
+ if (!priv->cca) {
+ dev_err(dev, "ioremap of the control area failed\n");
+ return -ENOMEM;
+ }
+
+ memcpy_fromio(&pa, &priv->cca->cmd_pa, 8);
+ pa = le64_to_cpu(pa);
+ priv->cmd = devm_ioremap_nocache(dev, le64_to_cpu(pa),
+ ioread32(&priv->cca->cmd_size));
+ if (!priv->cmd) {
+ dev_err(dev, "ioremap of the command buffer failed\n");
+ return -ENOMEM;
+ }
+
+ memcpy_fromio(&pa, &priv->cca->rsp_pa, 8);
+ pa = le64_to_cpu(pa);
+ priv->rsp = devm_ioremap_nocache(dev, le64_to_cpu(pa),
+ ioread32(&priv->cca->rsp_size));
+ if (!priv->rsp) {
+ dev_err(dev, "ioremap of the response buffer failed\n");
+ return -ENOMEM;
+ }
+
+ chip->vendor.priv = priv;
+
+ /* Default timeouts and durations */
+ chip->vendor.timeout_a = usecs_to_jiffies(TPM2_TIMEOUT_A);
+ chip->vendor.timeout_b = usecs_to_jiffies(TPM2_TIMEOUT_B);
+ chip->vendor.timeout_c = usecs_to_jiffies(TPM2_TIMEOUT_C);
+ chip->vendor.timeout_d = usecs_to_jiffies(TPM2_TIMEOUT_D);
+ chip->vendor.duration[TPM_SHORT] =
+ usecs_to_jiffies(TPM2_DURATION_SHORT);
+ chip->vendor.duration[TPM_MEDIUM] =
+ usecs_to_jiffies(TPM2_DURATION_MEDIUM);
+ chip->vendor.duration[TPM_LONG] =
+ usecs_to_jiffies(TPM2_DURATION_LONG);
+
+ chip->acpi_dev_handle = device->handle;
+
+ rc = tpm2_do_selftest(chip);
+ if (rc)
+ return rc;
+
+ return tpm_chip_register(chip);
+}
+
+int crb_acpi_remove(struct acpi_device *device)
+{
+ struct device *dev = &device->dev;
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+
+ tpm_chip_unregister(chip);
+ return 0;
+}
+
+static struct acpi_device_id crb_device_ids[] = {
+ {"MSFT0101", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, crb_device_ids);
+
+static struct acpi_driver crb_acpi_driver = {
+ .name = "tpm_crb",
+ .ids = crb_device_ids,
+ .ops = {
+ .add = crb_acpi_add,
+ .remove = crb_acpi_remove,
+ },
+ .drv = {
+ .pm = &crb_pm,
+ },
+};
+
+module_acpi_driver(crb_acpi_driver);
+MODULE_AUTHOR("Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>");
+MODULE_DESCRIPTION("TPM2 Driver");
+MODULE_VERSION("0.1");
+MODULE_LICENSE("GPL");
--
2.1.0
^ permalink raw reply related
* [PATCH v9 6/8] tpm: TPM 2.0 baseline support
From: Jarkko Sakkinen @ 2014-12-04 5:55 UTC (permalink / raw)
To: Peter Huewe, Ashley Lai, Marcel Selhorst
Cc: tpmdd-devel, linux-kernel, josh.triplett, christophe.ricard,
jason.gunthorpe, linux-api, trousers-tech, Jarkko Sakkinen,
Will Arthur
In-Reply-To: <1417672518-4530-1-git-send-email-jarkko.sakkinen@linux.intel.com>
TPM 2.0 devices are separated by adding a field 'flags' to struct
tpm_chip and defining a flag TPM_CHIP_FLAG_TPM2 for tagging them.
This patch adds the following internal functions:
- tpm2_get_random()
- tpm2_get_tpm_pt()
- tpm2_pcr_extend()
- tpm2_pcr_read()
- tpm2_startup()
Additionally, the following exported functions are implemented for
implementing TPM 2.0 device drivers:
- tpm2_do_selftest()
- tpm2_calc_ordinal_durations()
- tpm2_gen_interrupt()
The existing functions that are exported for the use for existing
subsystems have been changed to check the flags field in struct
tpm_chip and use appropriate TPM 2.0 counterpart if
TPM_CHIP_FLAG_TPM2 is est.
The code for tpm2_calc_ordinal_duration() and tpm2_startup() were
originally written by Will Arthur.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Will Arthur <will.c.arthur@intel.com>
---
drivers/char/tpm/Makefile | 2 +-
drivers/char/tpm/tpm-chip.c | 27 +-
drivers/char/tpm/tpm-interface.c | 24 +-
drivers/char/tpm/tpm.h | 61 +++++
drivers/char/tpm/tpm2-cmd.c | 542 +++++++++++++++++++++++++++++++++++++++
5 files changed, 641 insertions(+), 15 deletions(-)
create mode 100644 drivers/char/tpm/tpm2-cmd.c
diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
index c715596..88848ed 100644
--- a/drivers/char/tpm/Makefile
+++ b/drivers/char/tpm/Makefile
@@ -2,7 +2,7 @@
# Makefile for the kernel tpm device drivers.
#
obj-$(CONFIG_TCG_TPM) += tpm.o
-tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o
+tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o tpm2-cmd.o
tpm-$(CONFIG_ACPI) += tpm_ppi.o
ifdef CONFIG_ACPI
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 7741e28..3f3f2de 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -195,15 +195,18 @@ int tpm_chip_register(struct tpm_chip *chip)
if (rc)
return rc;
- rc = tpm_sysfs_add_device(chip);
- if (rc)
- goto del_misc;
+ /* Populate sysfs for TPM1 devices. */
+ if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
+ rc = tpm_sysfs_add_device(chip);
+ if (rc)
+ goto del_misc;
- rc = tpm_add_ppi(chip);
- if (rc)
- goto del_sysfs;
+ rc = tpm_add_ppi(chip);
+ if (rc)
+ goto del_sysfs;
- chip->bios_dir = tpm_bios_log_setup(chip->devname);
+ chip->bios_dir = tpm_bios_log_setup(chip->devname);
+ }
/* Make the chip available. */
spin_lock(&driver_lock);
@@ -236,10 +239,12 @@ void tpm_chip_unregister(struct tpm_chip *chip)
spin_unlock(&driver_lock);
synchronize_rcu();
- if (chip->bios_dir)
- tpm_bios_log_teardown(chip->bios_dir);
- tpm_remove_ppi(chip);
- tpm_sysfs_del_device(chip);
+ if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) {
+ if (chip->bios_dir)
+ tpm_bios_log_teardown(chip->bios_dir);
+ tpm_remove_ppi(chip);
+ tpm_sysfs_del_device(chip);
+ }
tpm_dev_del_device(chip);
}
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index b6f6b17..8a14887 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -360,7 +360,10 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
if (chip->vendor.irq)
goto out_recv;
- stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ stop = jiffies + tpm2_calc_ordinal_duration(chip, ordinal);
+ else
+ stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
do {
u8 status = chip->ops->status(chip);
if ((status & chip->ops->req_complete_mask) ==
@@ -483,7 +486,7 @@ static const struct tpm_input_header tpm_startup_header = {
static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
{
struct tpm_cmd_t start_cmd;
- start_cmd.header.in = tpm_startup_header;
+
start_cmd.params.startup_in.startup_type = startup_type;
return tpm_transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE,
"attempting to start the TPM");
@@ -680,7 +683,10 @@ int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf)
chip = tpm_chip_find_get(chip_num);
if (chip == NULL)
return -ENODEV;
- rc = tpm_pcr_read_dev(chip, pcr_idx, res_buf);
+ if (chip->flags & TPM_CHIP_FLAG_TPM2)
+ rc = tpm2_pcr_read(chip, pcr_idx, res_buf);
+ else
+ rc = tpm_pcr_read_dev(chip, pcr_idx, res_buf);
tpm_chip_put(chip);
return rc;
}
@@ -714,6 +720,12 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
if (chip == NULL)
return -ENODEV;
+ if (chip->flags & TPM_CHIP_FLAG_TPM2) {
+ rc = tpm2_pcr_extend(chip, pcr_idx, hash);
+ tpm_chip_put(chip);
+ return rc;
+ }
+
cmd.header.in = pcrextend_header;
cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(pcr_idx);
memcpy(cmd.params.pcrextend_in.hash, hash, TPM_DIGEST_SIZE);
@@ -974,6 +986,12 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
if (chip == NULL)
return -ENODEV;
+ if (chip->flags & TPM_CHIP_FLAG_TPM2) {
+ err = tpm2_get_random(chip, out, max);
+ tpm_chip_put(chip);
+ return err;
+ }
+
do {
tpm_cmd.header.in = tpm_getrandom_header;
tpm_cmd.params.getrandom_in.num_bytes = cpu_to_be32(num_bytes);
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 83103e0..d335d06 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -62,6 +62,52 @@ enum tpm_duration {
#define TPM_ERR_INVALID_POSTINIT 38
#define TPM_HEADER_SIZE 10
+
+enum tpm2_const {
+ TPM2_PLATFORM_PCR = 24,
+ TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8),
+ TPM2_TIMEOUT_A = 750 * 1000,
+ TPM2_TIMEOUT_B = 2000 * 1000,
+ TPM2_TIMEOUT_C = 200 * 1000,
+ TPM2_TIMEOUT_D = 30 * 1000,
+ TPM2_DURATION_SHORT = 20 * 1000,
+ TPM2_DURATION_MEDIUM = 750 * 1000,
+ TPM2_DURATION_LONG = 2000 * 1000,
+};
+
+enum tpm2_structures {
+ TPM2_ST_NO_SESSIONS = 0x8001,
+ TPM2_ST_SESSIONS = 0x8002,
+};
+
+enum tpm2_return_codes {
+ TPM2_RC_TESTING = 0x090A,
+ TPM2_RC_DISABLED = 0x0120,
+};
+
+enum tpm2_algorithms {
+ TPM2_ALG_SHA1 = 0x0004,
+};
+
+enum tpm2_command_codes {
+ TPM2_CC_FIRST = 0x011F,
+ TPM2_CC_SELF_TEST = 0x0143,
+ TPM2_CC_STARTUP = 0x0144,
+ TPM2_CC_GET_CAPABILITY = 0x017A,
+ TPM2_CC_GET_RANDOM = 0x017B,
+ TPM2_CC_PCR_READ = 0x017E,
+ TPM2_CC_PCR_EXTEND = 0x0182,
+ TPM2_CC_LAST = 0x018F,
+};
+
+enum tpm2_permanent_handles {
+ TPM2_RS_PW = 0x40000009,
+};
+
+enum tpm2_capabilities {
+ TPM2_CAP_TPM_PROPERTIES = 6,
+};
+
struct tpm_chip;
struct tpm_vendor_specific {
@@ -96,12 +142,17 @@ struct tpm_vendor_specific {
#define TPM_PPI_VERSION_LEN 3
+enum tpm_chip_flags {
+ TPM_CHIP_FLAG_TPM2 = BIT(0),
+};
+
struct tpm_chip {
struct device *pdev; /* Device stuff */
struct device dev;
struct cdev cdev;
const struct tpm_class_ops *ops;
+ unsigned int flags;
int dev_num; /* /dev/tpm# */
char devname[7];
@@ -364,3 +415,13 @@ static inline void tpm_remove_ppi(struct tpm_chip *chip)
{
}
#endif
+
+int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
+int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash);
+int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max);
+
+extern ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
+ u32 *value, const char *desc);
+extern unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *, u32);
+extern int tpm2_do_selftest(struct tpm_chip *chip);
+extern int tpm2_gen_interrupt(struct tpm_chip *chip);
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
new file mode 100644
index 0000000..e3fa681
--- /dev/null
+++ b/drivers/char/tpm/tpm2-cmd.c
@@ -0,0 +1,542 @@
+/*
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Authors:
+ * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
+ *
+ * Maintained by: <tpmdd-devel@lists.sourceforge.net>
+ *
+ * This file contains TPM2 protocol implementations of the commands
+ * used by the kernel internally.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+#include "tpm.h"
+
+struct tpm2_self_test_in {
+ u8 full_test;
+} __packed;
+
+struct tpm2_pcr_read_in {
+ __be32 pcr_selects_cnt;
+ __be16 hash_alg;
+ u8 pcr_select_size;
+ u8 pcr_select[TPM2_PCR_SELECT_MIN];
+} __packed;
+
+struct tpm2_pcr_read_out {
+ __be32 update_cnt;
+ __be32 pcr_selects_cnt;
+ __be16 hash_alg;
+ u8 pcr_select_size;
+ u8 pcr_select[TPM2_PCR_SELECT_MIN];
+ __be32 digests_cnt;
+ __be16 digest_size;
+ u8 digest[TPM_DIGEST_SIZE];
+} __packed;
+
+struct tpm2_null_auth_area {
+ __be32 handle;
+ __be16 nonce_size;
+ u8 attributes;
+ __be16 auth_size;
+} __packed;
+
+struct tpm2_pcr_extend_in {
+ __be32 pcr_idx;
+ __be32 auth_area_size;
+ struct tpm2_null_auth_area auth_area;
+ __be32 digest_cnt;
+ __be16 hash_alg;
+ u8 digest[TPM_DIGEST_SIZE];
+} __packed;
+
+struct tpm2_get_tpm_pt_in {
+ __be32 cap_id;
+ __be32 property_id;
+ __be32 property_cnt;
+} __packed;
+
+struct tpm2_get_tpm_pt_out {
+ u8 more_data;
+ __be32 subcap_id;
+ __be32 property_cnt;
+ __be32 property_id;
+ __be32 value;
+} __packed;
+
+struct tpm2_get_random_in {
+ __be16 size;
+} __packed;
+
+struct tpm2_get_random_out {
+ __be16 size;
+ u8 buffer[TPM_MAX_RNG_DATA];
+} __packed;
+
+union tpm2_cmd_params {
+ struct tpm2_self_test_in selftest_in;
+ struct tpm2_pcr_read_in pcrread_in;
+ struct tpm2_pcr_read_out pcrread_out;
+ struct tpm2_pcr_extend_in pcrextend_in;
+ struct tpm2_get_tpm_pt_in get_tpm_pt_in;
+ struct tpm2_get_tpm_pt_out get_tpm_pt_out;
+ struct tpm2_get_random_in getrandom_in;
+ struct tpm2_get_random_out getrandom_out;
+};
+
+struct tpm2_cmd {
+ tpm_cmd_header header;
+ union tpm2_cmd_params params;
+} __packed;
+
+/*
+ * Array with one entry per ordinal defining the maximum amount
+ * of time the chip could take to return the result. The values
+ * of the SHORT, MEDIUM, and LONG durations are taken from the
+ * PC Client Profile (PTP) specification.
+ */
+static const u8 tpm2_ordinal_duration[TPM2_CC_LAST - TPM2_CC_FIRST + 1] = {
+ TPM_UNDEFINED, /* 11F */
+ TPM_UNDEFINED, /* 120 */
+ TPM_LONG, /* 121 */
+ TPM_UNDEFINED, /* 122 */
+ TPM_UNDEFINED, /* 123 */
+ TPM_UNDEFINED, /* 124 */
+ TPM_UNDEFINED, /* 125 */
+ TPM_UNDEFINED, /* 126 */
+ TPM_UNDEFINED, /* 127 */
+ TPM_UNDEFINED, /* 128 */
+ TPM_LONG, /* 129 */
+ TPM_UNDEFINED, /* 12a */
+ TPM_UNDEFINED, /* 12b */
+ TPM_UNDEFINED, /* 12c */
+ TPM_UNDEFINED, /* 12d */
+ TPM_UNDEFINED, /* 12e */
+ TPM_UNDEFINED, /* 12f */
+ TPM_UNDEFINED, /* 130 */
+ TPM_UNDEFINED, /* 131 */
+ TPM_UNDEFINED, /* 132 */
+ TPM_UNDEFINED, /* 133 */
+ TPM_UNDEFINED, /* 134 */
+ TPM_UNDEFINED, /* 135 */
+ TPM_UNDEFINED, /* 136 */
+ TPM_UNDEFINED, /* 137 */
+ TPM_UNDEFINED, /* 138 */
+ TPM_UNDEFINED, /* 139 */
+ TPM_UNDEFINED, /* 13a */
+ TPM_UNDEFINED, /* 13b */
+ TPM_UNDEFINED, /* 13c */
+ TPM_UNDEFINED, /* 13d */
+ TPM_MEDIUM, /* 13e */
+ TPM_UNDEFINED, /* 13f */
+ TPM_UNDEFINED, /* 140 */
+ TPM_UNDEFINED, /* 141 */
+ TPM_UNDEFINED, /* 142 */
+ TPM_LONG, /* 143 */
+ TPM_MEDIUM, /* 144 */
+ TPM_UNDEFINED, /* 145 */
+ TPM_UNDEFINED, /* 146 */
+ TPM_UNDEFINED, /* 147 */
+ TPM_UNDEFINED, /* 148 */
+ TPM_UNDEFINED, /* 149 */
+ TPM_UNDEFINED, /* 14a */
+ TPM_UNDEFINED, /* 14b */
+ TPM_UNDEFINED, /* 14c */
+ TPM_UNDEFINED, /* 14d */
+ TPM_LONG, /* 14e */
+ TPM_UNDEFINED, /* 14f */
+ TPM_UNDEFINED, /* 150 */
+ TPM_UNDEFINED, /* 151 */
+ TPM_UNDEFINED, /* 152 */
+ TPM_UNDEFINED, /* 153 */
+ TPM_UNDEFINED, /* 154 */
+ TPM_UNDEFINED, /* 155 */
+ TPM_UNDEFINED, /* 156 */
+ TPM_UNDEFINED, /* 157 */
+ TPM_UNDEFINED, /* 158 */
+ TPM_UNDEFINED, /* 159 */
+ TPM_UNDEFINED, /* 15a */
+ TPM_UNDEFINED, /* 15b */
+ TPM_MEDIUM, /* 15c */
+ TPM_UNDEFINED, /* 15d */
+ TPM_UNDEFINED, /* 15e */
+ TPM_UNDEFINED, /* 15f */
+ TPM_UNDEFINED, /* 160 */
+ TPM_UNDEFINED, /* 161 */
+ TPM_UNDEFINED, /* 162 */
+ TPM_UNDEFINED, /* 163 */
+ TPM_UNDEFINED, /* 164 */
+ TPM_UNDEFINED, /* 165 */
+ TPM_UNDEFINED, /* 166 */
+ TPM_UNDEFINED, /* 167 */
+ TPM_UNDEFINED, /* 168 */
+ TPM_UNDEFINED, /* 169 */
+ TPM_UNDEFINED, /* 16a */
+ TPM_UNDEFINED, /* 16b */
+ TPM_UNDEFINED, /* 16c */
+ TPM_UNDEFINED, /* 16d */
+ TPM_UNDEFINED, /* 16e */
+ TPM_UNDEFINED, /* 16f */
+ TPM_UNDEFINED, /* 170 */
+ TPM_UNDEFINED, /* 171 */
+ TPM_UNDEFINED, /* 172 */
+ TPM_UNDEFINED, /* 173 */
+ TPM_UNDEFINED, /* 174 */
+ TPM_UNDEFINED, /* 175 */
+ TPM_UNDEFINED, /* 176 */
+ TPM_LONG, /* 177 */
+ TPM_UNDEFINED, /* 178 */
+ TPM_UNDEFINED, /* 179 */
+ TPM_MEDIUM, /* 17a */
+ TPM_LONG, /* 17b */
+ TPM_UNDEFINED, /* 17c */
+ TPM_UNDEFINED, /* 17d */
+ TPM_UNDEFINED, /* 17e */
+ TPM_UNDEFINED, /* 17f */
+ TPM_UNDEFINED, /* 180 */
+ TPM_UNDEFINED, /* 181 */
+ TPM_MEDIUM, /* 182 */
+ TPM_UNDEFINED, /* 183 */
+ TPM_UNDEFINED, /* 184 */
+ TPM_MEDIUM, /* 185 */
+ TPM_MEDIUM, /* 186 */
+ TPM_UNDEFINED, /* 187 */
+ TPM_UNDEFINED, /* 188 */
+ TPM_UNDEFINED, /* 189 */
+ TPM_UNDEFINED, /* 18a */
+ TPM_UNDEFINED, /* 18b */
+ TPM_UNDEFINED, /* 18c */
+ TPM_UNDEFINED, /* 18d */
+ TPM_UNDEFINED, /* 18e */
+ TPM_UNDEFINED /* 18f */
+};
+
+#define TPM2_PCR_READ_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_pcr_read_in))
+
+static const struct tpm_input_header tpm2_pcrread_header = {
+ .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
+ .length = cpu_to_be32(TPM2_PCR_READ_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_PCR_READ)
+};
+
+/**
+ * tpm2_pcr_read() - read a PCR value
+ * @chip: TPM chip to use.
+ * @pcr_idx: index of the PCR to read.
+ * @ref_buf: buffer to store the resulting hash,
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
+{
+ int rc;
+ struct tpm2_cmd cmd;
+ u8 *buf;
+
+ if (pcr_idx >= TPM2_PLATFORM_PCR)
+ return -EINVAL;
+
+ cmd.header.in = tpm2_pcrread_header;
+ cmd.params.pcrread_in.pcr_selects_cnt = cpu_to_be32(1);
+ cmd.params.pcrread_in.hash_alg = cpu_to_be16(TPM2_ALG_SHA1);
+ cmd.params.pcrread_in.pcr_select_size = TPM2_PCR_SELECT_MIN;
+
+ memset(cmd.params.pcrread_in.pcr_select, 0,
+ sizeof(cmd.params.pcrread_in.pcr_select));
+ cmd.params.pcrread_in.pcr_select[pcr_idx >> 3] = 1 << (pcr_idx & 0x7);
+
+ rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
+ "attempting to read a pcr value");
+ if (rc == 0) {
+ buf = cmd.params.pcrread_out.digest;
+ memcpy(res_buf, buf, TPM_DIGEST_SIZE);
+ }
+
+ return rc;
+}
+
+#define TPM2_GET_PCREXTEND_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_pcr_extend_in))
+
+static const struct tpm_input_header tpm2_pcrextend_header = {
+ .tag = cpu_to_be16(TPM2_ST_SESSIONS),
+ .length = cpu_to_be32(TPM2_GET_PCREXTEND_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_PCR_EXTEND)
+};
+
+/**
+ * tpm2_pcr_extend() - extend a PCR value
+ * @chip: TPM chip to use.
+ * @pcr_idx: index of the PCR.
+ * @hash: hash value to use for the extend operation.
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash)
+{
+ struct tpm2_cmd cmd;
+ int rc;
+
+ cmd.header.in = tpm2_pcrextend_header;
+ cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(pcr_idx);
+ cmd.params.pcrextend_in.auth_area_size =
+ cpu_to_be32(sizeof(struct tpm2_null_auth_area));
+ cmd.params.pcrextend_in.auth_area.handle =
+ cpu_to_be32(TPM2_RS_PW);
+ cmd.params.pcrextend_in.auth_area.nonce_size = 0;
+ cmd.params.pcrextend_in.auth_area.attributes = 0;
+ cmd.params.pcrextend_in.auth_area.auth_size = 0;
+ cmd.params.pcrextend_in.digest_cnt = cpu_to_be32(1);
+ cmd.params.pcrextend_in.hash_alg = cpu_to_be16(TPM2_ALG_SHA1);
+ memcpy(cmd.params.pcrextend_in.digest, hash, TPM_DIGEST_SIZE);
+
+ rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
+ "attempting extend a PCR value");
+
+ return rc;
+}
+
+#define TPM2_GETRANDOM_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_get_random_in))
+
+static const struct tpm_input_header tpm2_getrandom_header = {
+ .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
+ .length = cpu_to_be32(TPM2_GETRANDOM_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_GET_RANDOM)
+};
+
+/**
+ * tpm2_get_random() - get random bytes from the TPM RNG
+ * @chip: TPM chip to use
+ * @out: destination buffer for the random bytes
+ * @max: the max number of bytes to write to @out
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max)
+{
+ struct tpm2_cmd cmd;
+ u32 recd;
+ u32 num_bytes;
+ int err;
+ int total = 0;
+ int retries = 5;
+ u8 *dest = out;
+
+ num_bytes = min_t(u32, max, sizeof(cmd.params.getrandom_out.buffer));
+
+ if (!out || !num_bytes ||
+ max > sizeof(cmd.params.getrandom_out.buffer))
+ return -EINVAL;
+
+ do {
+ cmd.header.in = tpm2_getrandom_header;
+ cmd.params.getrandom_in.size = cpu_to_be16(num_bytes);
+
+ err = tpm_transmit_cmd(chip, &cmd, sizeof(cmd),
+ "attempting get random");
+ if (err)
+ break;
+
+ recd = min_t(u32, be16_to_cpu(cmd.params.getrandom_out.size),
+ num_bytes);
+ memcpy(dest, cmd.params.getrandom_out.buffer, recd);
+
+ dest += recd;
+ total += recd;
+ num_bytes -= recd;
+ } while (retries-- && total < max);
+
+ return total ? total : -EIO;
+}
+
+#define TPM2_GET_TPM_PT_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_get_tpm_pt_in))
+
+static const struct tpm_input_header tpm2_get_tpm_pt_header = {
+ .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
+ .length = cpu_to_be32(TPM2_GET_TPM_PT_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_GET_CAPABILITY)
+};
+
+/**
+ * tpm2_get_tpm_pt() - get value of a TPM_CAP_TPM_PROPERTIES type property
+ * @chip: TPM chip to use.
+ * @property_id: property ID.
+ * @value: output variable.
+ * @desc: passed to tpm_transmit_cmd()
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id, u32 *value,
+ const char *desc)
+{
+ struct tpm2_cmd cmd;
+ int rc;
+
+ cmd.header.in = tpm2_get_tpm_pt_header;
+ cmd.params.get_tpm_pt_in.cap_id = cpu_to_be32(TPM2_CAP_TPM_PROPERTIES);
+ cmd.params.get_tpm_pt_in.property_id = cpu_to_be32(property_id);
+ cmd.params.get_tpm_pt_in.property_cnt = cpu_to_be32(1);
+
+ rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), desc);
+ if (!rc)
+ *value = cmd.params.get_tpm_pt_out.value;
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(tpm2_get_tpm_pt);
+
+/*
+ * tpm2_calc_ordinal_duration() - maximum duration for a command
+ * @chip: TPM chip to use.
+ * @ordinal: command code number.
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *chip, u32 ordinal)
+{
+ int index = TPM_UNDEFINED;
+ int duration = 0;
+
+ if (ordinal >= TPM2_CC_FIRST && ordinal <= TPM2_CC_LAST)
+ index = tpm2_ordinal_duration[ordinal - TPM2_CC_FIRST];
+
+ if (index != TPM_UNDEFINED)
+ duration = chip->vendor.duration[index];
+
+ if (duration <= 0)
+ duration = 2 * 60 * HZ;
+
+ return duration;
+}
+EXPORT_SYMBOL_GPL(tpm2_calc_ordinal_duration);
+
+#define TPM2_SELF_TEST_IN_SIZE \
+ (sizeof(struct tpm_input_header) + \
+ sizeof(struct tpm2_self_test_in))
+
+static const struct tpm_input_header tpm2_selftest_header = {
+ .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
+ .length = cpu_to_be32(TPM2_SELF_TEST_IN_SIZE),
+ .ordinal = cpu_to_be32(TPM2_CC_SELF_TEST)
+};
+
+/**
+ * tpm2_continue_selftest() - start a self test
+ * @chip: TPM chip to use
+ * @full: test all commands instead of testing only those that were not
+ * previously tested.
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+static int tpm2_start_selftest(struct tpm_chip *chip, bool full)
+{
+ int rc;
+ struct tpm2_cmd cmd;
+
+ cmd.header.in = tpm2_selftest_header;
+ cmd.params.selftest_in.full_test = full;
+
+ rc = tpm_transmit_cmd(chip, &cmd, TPM2_SELF_TEST_IN_SIZE,
+ "continue selftest");
+
+ return rc;
+}
+
+/**
+ * tpm2_do_selftest() - run a full self test
+ * @chip: TPM chip to use
+ *
+ * During the self test TPM2 commands return with the error code RC_TESTING.
+ * Waiting is done by issuing PCR read until it executes successfully.
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_do_selftest(struct tpm_chip *chip)
+{
+ int rc;
+ unsigned int loops;
+ unsigned int delay_msec = 100;
+ unsigned long duration;
+ struct tpm2_cmd cmd;
+ int i;
+
+ duration = tpm2_calc_ordinal_duration(chip, TPM2_CC_SELF_TEST);
+
+ loops = jiffies_to_msecs(duration) / delay_msec;
+
+ rc = tpm2_start_selftest(chip, true);
+ if (rc)
+ return rc;
+
+ for (i = 0; i < loops; i++) {
+ /* Attempt to read a PCR value */
+ cmd.header.in = tpm2_pcrread_header;
+ cmd.params.pcrread_in.pcr_selects_cnt = cpu_to_be32(1);
+ cmd.params.pcrread_in.hash_alg = cpu_to_be16(TPM2_ALG_SHA1);
+ cmd.params.pcrread_in.pcr_select_size = TPM2_PCR_SELECT_MIN;
+ cmd.params.pcrread_in.pcr_select[0] = 0x01;
+ cmd.params.pcrread_in.pcr_select[1] = 0x00;
+ cmd.params.pcrread_in.pcr_select[2] = 0x00;
+
+ rc = tpm_transmit_cmd(chip, (u8 *) &cmd, sizeof(cmd), NULL);
+ if (rc < 0)
+ break;
+
+ rc = be32_to_cpu(cmd.header.out.return_code);
+ if (rc != TPM2_RC_TESTING)
+ break;
+
+ msleep(delay_msec);
+ }
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(tpm2_do_selftest);
+
+/**
+ * tpm2_gen_interrupt() - generate an interrupt
+ * @chip: TPM chip to use
+ *
+ * 0 is returned when the operation is successful. If a negative number is
+ * returned it remarks a POSIX error code. If a positive number is returned
+ * it remarks a TPM error.
+ */
+int tpm2_gen_interrupt(struct tpm_chip *chip)
+{
+ u32 dummy;
+ int rc;
+
+ rc = tpm2_get_tpm_pt(chip,
+ TPM2_CAP_TPM_PROPERTIES,
+ &dummy,
+ "attempting to generate an interrupt");
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(tpm2_gen_interrupt);
--
2.1.0
^ permalink raw reply related
* [PATCH v9 5/8] tpm: device class for tpm
From: Jarkko Sakkinen @ 2014-12-04 5:55 UTC (permalink / raw)
To: Peter Huewe, Ashley Lai, Marcel Selhorst
Cc: tpmdd-devel, linux-kernel, josh.triplett, christophe.ricard,
jason.gunthorpe, linux-api, trousers-tech, Jarkko Sakkinen
In-Reply-To: <1417672518-4530-1-git-send-email-jarkko.sakkinen@linux.intel.com>
Added own device class for TPM. Uses MISC_MAJOR:TPM_MINOR for the
first character device in order to retain backwards compatibility.
Added tpm_dev_release() back attached to the character device.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
drivers/char/tpm/tpm-chip.c | 72 ++++++++++++++++++++++++++++++++------
drivers/char/tpm/tpm-dev.c | 36 ++-----------------
drivers/char/tpm/tpm-interface.c | 29 +++++++++++++++
drivers/char/tpm/tpm.h | 12 ++++---
drivers/char/tpm/tpm_i2c_nuvoton.c | 2 +-
drivers/char/tpm/tpm_tis.c | 4 +--
6 files changed, 105 insertions(+), 50 deletions(-)
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index c584161..7741e28 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -25,6 +25,7 @@
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/freezer.h>
+#include <linux/major.h>
#include "tpm.h"
#include "tpm_eventlog.h"
@@ -32,6 +33,9 @@ static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
static LIST_HEAD(tpm_chip_list);
static DEFINE_SPINLOCK(driver_lock);
+struct class *tpm_class;
+dev_t tpm_devt;
+
/*
* tpm_chip_find_get - return tpm_chip for a given chip number
* @chip_num the device number for the chip
@@ -55,16 +59,14 @@ struct tpm_chip *tpm_chip_find_get(int chip_num)
}
/**
- * tpmm_chip_remove() - free chip memory and device number
- * @data: points to struct tpm_chip instance
+ * tpm_dev_release() - free chip memory and the device number
+ * @dev: the character device for the TPM chip
*
- * This is used internally by tpmm_chip_alloc() and called by devres
- * when the device is released. This function does the opposite of
- * tpmm_chip_alloc() freeing memory and the device number.
+ * This is used as the release function for the character device.
*/
-static void tpmm_chip_remove(void *data)
+static void tpm_dev_release(struct device *dev)
{
- struct tpm_chip *chip = (struct tpm_chip *) data;
+ struct tpm_chip *chip = container_of(dev, struct tpm_chip, dev);
spin_lock(&driver_lock);
clear_bit(chip->dev_num, dev_mask);
@@ -111,18 +113,68 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
scnprintf(chip->devname, sizeof(chip->devname), "tpm%d", chip->dev_num);
chip->pdev = dev;
- devm_add_action(dev, tpmm_chip_remove, chip);
+
dev_set_drvdata(dev, chip);
+ chip->dev.class = tpm_class;
+ chip->dev.release = tpm_dev_release;
+ chip->dev.parent = chip->pdev;
+
+ if (chip->dev_num == 0)
+ chip->dev.devt = MKDEV(MISC_MAJOR, TPM_MINOR);
+ else
+ chip->dev.devt = MKDEV(MAJOR(tpm_devt), chip->dev_num);
+
+ dev_set_name(&chip->dev, chip->devname);
+
+ device_initialize(&chip->dev);
+
+ chip->cdev.owner = chip->pdev->driver->owner;
+ cdev_init(&chip->cdev, &tpm_fops);
+
return chip;
}
EXPORT_SYMBOL_GPL(tpmm_chip_alloc);
+static int tpm_dev_add_device(struct tpm_chip *chip)
+{
+ int rc;
+
+ rc = device_add(&chip->dev);
+ if (rc) {
+ dev_err(&chip->dev,
+ "unable to device_register() %s, major %d, minor %d, err=%d\n",
+ chip->devname, MAJOR(chip->dev.devt),
+ MINOR(chip->dev.devt), rc);
+
+ return rc;
+ }
+
+ rc = cdev_add(&chip->cdev, chip->dev.devt, 1);
+ if (rc) {
+ dev_err(&chip->dev,
+ "unable to cdev_add() %s, major %d, minor %d, err=%d\n",
+ chip->devname, MAJOR(chip->dev.devt),
+ MINOR(chip->dev.devt), rc);
+
+ device_unregister(&chip->dev);
+ return rc;
+ }
+
+ return rc;
+}
+
+static void tpm_dev_del_device(struct tpm_chip *chip)
+{
+ cdev_del(&chip->cdev);
+ device_unregister(&chip->dev);
+}
+
/*
- * tpm_chip_register() - create a misc driver for the TPM chip
+ * tpm_chip_register() - create a character device for the TPM chip
* @chip: TPM chip to use.
*
- * Creates a misc driver for the TPM chip and adds sysfs interfaces for
+ * Creates a character device for the TPM chip and adds sysfs interfaces for
* the device, PPI and TCPA. As the last step this function adds the
* chip to the list of TPM chips available for use.
*
diff --git a/drivers/char/tpm/tpm-dev.c b/drivers/char/tpm/tpm-dev.c
index 3568321..de0337e 100644
--- a/drivers/char/tpm/tpm-dev.c
+++ b/drivers/char/tpm/tpm-dev.c
@@ -17,7 +17,6 @@
* License.
*
*/
-#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include "tpm.h"
@@ -54,9 +53,8 @@ static void timeout_work(struct work_struct *work)
static int tpm_open(struct inode *inode, struct file *file)
{
- struct miscdevice *misc = file->private_data;
- struct tpm_chip *chip = container_of(misc, struct tpm_chip,
- vendor.miscdev);
+ struct tpm_chip *chip =
+ container_of(inode->i_cdev, struct tpm_chip, cdev);
struct file_priv *priv;
/* It's assured that the chip will be opened just once,
@@ -173,7 +171,7 @@ static int tpm_release(struct inode *inode, struct file *file)
return 0;
}
-static const struct file_operations tpm_fops = {
+const struct file_operations tpm_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.open = tpm_open,
@@ -182,32 +180,4 @@ static const struct file_operations tpm_fops = {
.release = tpm_release,
};
-int tpm_dev_add_device(struct tpm_chip *chip)
-{
- int rc;
- chip->vendor.miscdev.fops = &tpm_fops;
- if (chip->dev_num == 0)
- chip->vendor.miscdev.minor = TPM_MINOR;
- else
- chip->vendor.miscdev.minor = MISC_DYNAMIC_MINOR;
-
- chip->vendor.miscdev.name = chip->devname;
- chip->vendor.miscdev.parent = chip->pdev;
-
- rc = misc_register(&chip->vendor.miscdev);
- if (rc) {
- chip->vendor.miscdev.name = NULL;
- dev_err(chip->pdev,
- "unable to misc_register %s, minor %d err=%d\n",
- chip->vendor.miscdev.name,
- chip->vendor.miscdev.minor, rc);
- }
- return rc;
-}
-
-void tpm_dev_del_device(struct tpm_chip *chip)
-{
- if (chip->vendor.miscdev.name)
- misc_deregister(&chip->vendor.miscdev);
-}
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index e2af28f..b6f6b17 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -997,6 +997,35 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
}
EXPORT_SYMBOL_GPL(tpm_get_random);
+static int __init tpm_init(void)
+{
+ int rc;
+
+ tpm_class = class_create(THIS_MODULE, "tpm");
+ if (IS_ERR(tpm_class)) {
+ pr_err("couldn't create tpm class\n");
+ return PTR_ERR(tpm_class);
+ }
+
+ rc = alloc_chrdev_region(&tpm_devt, 0, TPM_NUM_DEVICES, "tpm");
+ if (rc < 0) {
+ pr_err("tpm: failed to allocate char dev region\n");
+ class_destroy(tpm_class);
+ return rc;
+ }
+
+ return 0;
+}
+
+static void __exit tpm_exit(void)
+{
+ class_destroy(tpm_class);
+ unregister_chrdev_region(tpm_devt, TPM_NUM_DEVICES);
+}
+
+subsys_initcall(tpm_init);
+module_exit(tpm_exit);
+
MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
MODULE_DESCRIPTION("TPM Driver");
MODULE_VERSION("2.0");
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index b3a7c76..83103e0 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -23,11 +23,11 @@
#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/sched.h>
-#include <linux/miscdevice.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/tpm.h>
#include <linux/acpi.h>
+#include <linux/cdev.h>
enum tpm_const {
TPM_MINOR = 224, /* officially assigned */
@@ -74,7 +74,6 @@ struct tpm_vendor_specific {
int region_size;
int have_region;
- struct miscdevice miscdev;
struct list_head list;
int locality;
unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
@@ -99,6 +98,9 @@ struct tpm_vendor_specific {
struct tpm_chip {
struct device *pdev; /* Device stuff */
+ struct device dev;
+ struct cdev cdev;
+
const struct tpm_class_ops *ops;
int dev_num; /* /dev/tpm# */
@@ -320,6 +322,10 @@ struct tpm_cmd_t {
tpm_cmd_params params;
} __packed;
+extern struct class *tpm_class;
+extern dev_t tpm_devt;
+extern const struct file_operations tpm_fops;
+
ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
size_t bufsiz);
@@ -340,8 +346,6 @@ extern struct tpm_chip *tpmm_chip_alloc(struct device *dev,
extern int tpm_chip_register(struct tpm_chip *chip);
extern void tpm_chip_unregister(struct tpm_chip *chip);
-int tpm_dev_add_device(struct tpm_chip *chip);
-void tpm_dev_del_device(struct tpm_chip *chip);
int tpm_sysfs_add_device(struct tpm_chip *chip);
void tpm_sysfs_del_device(struct tpm_chip *chip);
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index e1eadb0..9d42b7d 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -560,7 +560,7 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
rc = devm_request_irq(dev, chip->vendor.irq,
i2c_nuvoton_int_handler,
IRQF_TRIGGER_LOW,
- chip->vendor.miscdev.name,
+ chip->devname,
chip);
if (rc) {
dev_err(dev, "%s() Unable to request irq: %d for use\n",
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 6b15545..89e1abb 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -698,7 +698,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
TPM_INT_VECTOR(chip->vendor.locality));
if (devm_request_irq
(dev, i, tis_int_probe, IRQF_SHARED,
- chip->vendor.miscdev.name, chip) != 0) {
+ chip->devname, chip) != 0) {
dev_info(chip->pdev,
"Unable to request irq: %d for probe\n",
i);
@@ -745,7 +745,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
TPM_INT_VECTOR(chip->vendor.locality));
if (devm_request_irq
(dev, chip->vendor.irq, tis_int_handler, IRQF_SHARED,
- chip->vendor.miscdev.name, chip) != 0) {
+ chip->devname, chip) != 0) {
dev_info(chip->pdev,
"Unable to request irq: %d for use\n",
chip->vendor.irq);
--
2.1.0
^ permalink raw reply related
* [PATCH v9 4/8] tpm: rename chip->dev to chip->pdev
From: Jarkko Sakkinen @ 2014-12-04 5:55 UTC (permalink / raw)
To: Peter Huewe, Ashley Lai, Marcel Selhorst
Cc: tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
josh.triplett-ral2JQCrhuEAvxtiuMwx3w,
christophe.ricard-Re5JQEeQqe8AvxtiuMwx3w,
jason.gunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/,
linux-api-u79uwXL29TY76Z2rM5mHXA,
trousers-tech-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f, Jarkko Sakkinen
In-Reply-To: <1417672518-4530-1-git-send-email-jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
Rename chip->dev to chip->pdev to make it explicit that this not the
character device but actually represents the platform device.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
---
drivers/char/tpm/tpm-chip.c | 4 ++--
drivers/char/tpm/tpm-dev.c | 10 +++++-----
drivers/char/tpm/tpm-interface.c | 29 +++++++++++++++--------------
drivers/char/tpm/tpm-sysfs.c | 6 +++---
drivers/char/tpm/tpm.h | 4 ++--
drivers/char/tpm/tpm_atmel.c | 14 +++++++-------
drivers/char/tpm/tpm_i2c_atmel.c | 16 ++++++++--------
drivers/char/tpm/tpm_i2c_infineon.c | 6 +++---
drivers/char/tpm/tpm_i2c_nuvoton.c | 22 +++++++++++-----------
drivers/char/tpm/tpm_i2c_stm_st33.c | 14 +++++++-------
drivers/char/tpm/tpm_infineon.c | 22 +++++++++++-----------
drivers/char/tpm/tpm_nsc.c | 20 ++++++++++----------
drivers/char/tpm/tpm_ppi.c | 4 ++--
drivers/char/tpm/tpm_tis.c | 14 +++++++-------
14 files changed, 93 insertions(+), 92 deletions(-)
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 543939b..c584161 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -45,7 +45,7 @@ struct tpm_chip *tpm_chip_find_get(int chip_num)
if (chip_num != TPM_ANY_NUM && chip_num != pos->dev_num)
continue;
- if (try_module_get(pos->dev->driver->owner)) {
+ if (try_module_get(pos->pdev->driver->owner)) {
chip = pos;
break;
}
@@ -110,7 +110,7 @@ struct tpm_chip *tpmm_chip_alloc(struct device *dev,
scnprintf(chip->devname, sizeof(chip->devname), "tpm%d", chip->dev_num);
- chip->dev = dev;
+ chip->pdev = dev;
devm_add_action(dev, tpmm_chip_remove, chip);
dev_set_drvdata(dev, chip);
diff --git a/drivers/char/tpm/tpm-dev.c b/drivers/char/tpm/tpm-dev.c
index d9b774e..3568321 100644
--- a/drivers/char/tpm/tpm-dev.c
+++ b/drivers/char/tpm/tpm-dev.c
@@ -63,7 +63,7 @@ static int tpm_open(struct inode *inode, struct file *file)
* by the check of is_open variable, which is protected
* by driver_lock. */
if (test_and_set_bit(0, &chip->is_open)) {
- dev_dbg(chip->dev, "Another process owns this TPM\n");
+ dev_dbg(chip->pdev, "Another process owns this TPM\n");
return -EBUSY;
}
@@ -81,7 +81,7 @@ static int tpm_open(struct inode *inode, struct file *file)
INIT_WORK(&priv->work, timeout_work);
file->private_data = priv;
- get_device(chip->dev);
+ get_device(chip->pdev);
return 0;
}
@@ -168,7 +168,7 @@ static int tpm_release(struct inode *inode, struct file *file)
file->private_data = NULL;
atomic_set(&priv->data_pending, 0);
clear_bit(0, &priv->chip->is_open);
- put_device(priv->chip->dev);
+ put_device(priv->chip->pdev);
kfree(priv);
return 0;
}
@@ -193,12 +193,12 @@ int tpm_dev_add_device(struct tpm_chip *chip)
chip->vendor.miscdev.minor = MISC_DYNAMIC_MINOR;
chip->vendor.miscdev.name = chip->devname;
- chip->vendor.miscdev.parent = chip->dev;
+ chip->vendor.miscdev.parent = chip->pdev;
rc = misc_register(&chip->vendor.miscdev);
if (rc) {
chip->vendor.miscdev.name = NULL;
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"unable to misc_register %s, minor %d err=%d\n",
chip->vendor.miscdev.name,
chip->vendor.miscdev.minor, rc);
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 4dbed1e..e2af28f 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -343,7 +343,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
if (count == 0)
return -ENODATA;
if (count > bufsiz) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"invalid count value %x %zx\n", count, bufsiz);
return -E2BIG;
}
@@ -352,7 +352,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
rc = chip->ops->send(chip, (u8 *) buf, count);
if (rc < 0) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"tpm_transmit: tpm_send: error %zd\n", rc);
goto out;
}
@@ -368,7 +368,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
goto out_recv;
if (chip->ops->req_canceled(chip, status)) {
- dev_err(chip->dev, "Operation Canceled\n");
+ dev_err(chip->pdev, "Operation Canceled\n");
rc = -ECANCELED;
goto out;
}
@@ -378,14 +378,14 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
} while (time_before(jiffies, stop));
chip->ops->cancel(chip);
- dev_err(chip->dev, "Operation Timed out\n");
+ dev_err(chip->pdev, "Operation Timed out\n");
rc = -ETIME;
goto out;
out_recv:
rc = chip->ops->recv(chip, (u8 *) buf, bufsiz);
if (rc < 0)
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"tpm_transmit: tpm_recv: error %zd\n", rc);
out:
mutex_unlock(&chip->tpm_mutex);
@@ -411,7 +411,8 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd,
err = be32_to_cpu(header->return_code);
if (err != 0 && desc)
- dev_err(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
+ dev_err(chip->pdev, "A TPM error (%d) occurred %s\n", err,
+ desc);
return err;
}
@@ -505,7 +506,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
if (rc == TPM_ERR_INVALID_POSTINIT) {
/* The TPM is not started, we are the first to talk to it.
Execute a startup command. */
- dev_info(chip->dev, "Issuing TPM_STARTUP");
+ dev_info(chip->pdev, "Issuing TPM_STARTUP");
if (tpm_startup(chip, TPM_ST_CLEAR))
return rc;
@@ -517,7 +518,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
NULL);
}
if (rc) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"A TPM error (%zd) occurred attempting to determine the timeouts\n",
rc);
goto duration;
@@ -556,7 +557,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
/* Report adjusted timeouts */
if (chip->vendor.timeout_adjusted) {
- dev_info(chip->dev,
+ dev_info(chip->pdev,
HW_ERR "Adjusting reported timeouts: A %lu->%luus B %lu->%luus C %lu->%luus D %lu->%luus\n",
old_timeout[0], new_timeout[0],
old_timeout[1], new_timeout[1],
@@ -603,7 +604,7 @@ duration:
chip->vendor.duration[TPM_MEDIUM] *= 1000;
chip->vendor.duration[TPM_LONG] *= 1000;
chip->vendor.duration_adjusted = true;
- dev_info(chip->dev, "Adjusting TPM timeout parameters.");
+ dev_info(chip->pdev, "Adjusting TPM timeout parameters.");
}
return 0;
}
@@ -760,7 +761,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
* around 300ms while the self test is ongoing, keep trying
* until the self test duration expires. */
if (rc == -ETIME) {
- dev_info(chip->dev, HW_ERR "TPM command timed out during continue self test");
+ dev_info(chip->pdev, HW_ERR "TPM command timed out during continue self test");
msleep(delay_msec);
continue;
}
@@ -770,7 +771,7 @@ int tpm_do_selftest(struct tpm_chip *chip)
rc = be32_to_cpu(cmd.header.out.return_code);
if (rc == TPM_ERR_DISABLED || rc == TPM_ERR_DEACTIVATED) {
- dev_info(chip->dev,
+ dev_info(chip->pdev,
"TPM is disabled/deactivated (0x%X)\n", rc);
/* TPM is disabled and/or deactivated; driver can
* proceed and TPM does handle commands for
@@ -918,10 +919,10 @@ int tpm_pm_suspend(struct device *dev)
}
if (rc)
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"Error (%d) sending savestate before suspend\n", rc);
else if (try > 0)
- dev_warn(chip->dev, "TPM savestate took %dms\n",
+ dev_warn(chip->pdev, "TPM savestate took %dms\n",
try * TPM_TIMEOUT_RETRY);
return rc;
diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
index 8ecb052..ee66fd4 100644
--- a/drivers/char/tpm/tpm-sysfs.c
+++ b/drivers/char/tpm/tpm-sysfs.c
@@ -284,16 +284,16 @@ static const struct attribute_group tpm_dev_group = {
int tpm_sysfs_add_device(struct tpm_chip *chip)
{
int err;
- err = sysfs_create_group(&chip->dev->kobj,
+ err = sysfs_create_group(&chip->pdev->kobj,
&tpm_dev_group);
if (err)
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"failed to create sysfs attributes, %d\n", err);
return err;
}
void tpm_sysfs_del_device(struct tpm_chip *chip)
{
- sysfs_remove_group(&chip->dev->kobj, &tpm_dev_group);
+ sysfs_remove_group(&chip->pdev->kobj, &tpm_dev_group);
}
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 69f4003..b3a7c76 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -98,7 +98,7 @@ struct tpm_vendor_specific {
#define TPM_PPI_VERSION_LEN 3
struct tpm_chip {
- struct device *dev; /* Device stuff */
+ struct device *pdev; /* Device stuff */
const struct tpm_class_ops *ops;
int dev_num; /* /dev/tpm# */
@@ -124,7 +124,7 @@ struct tpm_chip {
static inline void tpm_chip_put(struct tpm_chip *chip)
{
- module_put(chip->dev->driver->owner);
+ module_put(chip->pdev->driver->owner);
}
static inline int tpm_read_index(int base, int index)
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
index 8e2576a..8a52ebe 100644
--- a/drivers/char/tpm/tpm_atmel.c
+++ b/drivers/char/tpm/tpm_atmel.c
@@ -49,7 +49,7 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
for (i = 0; i < 6; i++) {
status = ioread8(chip->vendor.iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev, "error reading header\n");
+ dev_err(chip->pdev, "error reading header\n");
return -EIO;
}
*buf++ = ioread8(chip->vendor.iobase);
@@ -60,12 +60,12 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
size = be32_to_cpu(*native_size);
if (count < size) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"Recv size(%d) less than available space\n", size);
for (; i < size; i++) { /* clear the waiting data anyway */
status = ioread8(chip->vendor.iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev, "error reading data\n");
+ dev_err(chip->pdev, "error reading data\n");
return -EIO;
}
}
@@ -76,7 +76,7 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
for (; i < size; i++) {
status = ioread8(chip->vendor.iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev, "error reading data\n");
+ dev_err(chip->pdev, "error reading data\n");
return -EIO;
}
*buf++ = ioread8(chip->vendor.iobase);
@@ -86,7 +86,7 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
status = ioread8(chip->vendor.iobase + 1);
if (status & ATML_STATUS_DATA_AVAIL) {
- dev_err(chip->dev, "data available is stuck\n");
+ dev_err(chip->pdev, "data available is stuck\n");
return -EIO;
}
@@ -97,9 +97,9 @@ static int tpm_atml_send(struct tpm_chip *chip, u8 *buf, size_t count)
{
int i;
- dev_dbg(chip->dev, "tpm_atml_send:\n");
+ dev_dbg(chip->pdev, "tpm_atml_send:\n");
for (i = 0; i < count; i++) {
- dev_dbg(chip->dev, "%d 0x%x(%d)\n", i, buf[i], buf[i]);
+ dev_dbg(chip->pdev, "%d 0x%x(%d)\n", i, buf[i], buf[i]);
iowrite8(buf[i], chip->vendor.iobase);
}
diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c
index 643a940..7a0ca78 100644
--- a/drivers/char/tpm/tpm_i2c_atmel.c
+++ b/drivers/char/tpm/tpm_i2c_atmel.c
@@ -52,7 +52,7 @@ struct priv_data {
static int i2c_atmel_send(struct tpm_chip *chip, u8 *buf, size_t len)
{
struct priv_data *priv = chip->vendor.priv;
- struct i2c_client *client = to_i2c_client(chip->dev);
+ struct i2c_client *client = to_i2c_client(chip->pdev);
s32 status;
priv->len = 0;
@@ -62,7 +62,7 @@ static int i2c_atmel_send(struct tpm_chip *chip, u8 *buf, size_t len)
status = i2c_master_send(client, buf, len);
- dev_dbg(chip->dev,
+ dev_dbg(chip->pdev,
"%s(buf=%*ph len=%0zx) -> sts=%d\n", __func__,
(int)min_t(size_t, 64, len), buf, len, status);
return status;
@@ -71,7 +71,7 @@ static int i2c_atmel_send(struct tpm_chip *chip, u8 *buf, size_t len)
static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
{
struct priv_data *priv = chip->vendor.priv;
- struct i2c_client *client = to_i2c_client(chip->dev);
+ struct i2c_client *client = to_i2c_client(chip->pdev);
struct tpm_output_header *hdr =
(struct tpm_output_header *)priv->buffer;
u32 expected_len;
@@ -88,7 +88,7 @@ static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
return -ENOMEM;
if (priv->len >= expected_len) {
- dev_dbg(chip->dev,
+ dev_dbg(chip->pdev,
"%s early(buf=%*ph count=%0zx) -> ret=%d\n", __func__,
(int)min_t(size_t, 64, expected_len), buf, count,
expected_len);
@@ -97,7 +97,7 @@ static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
}
rc = i2c_master_recv(client, buf, expected_len);
- dev_dbg(chip->dev,
+ dev_dbg(chip->pdev,
"%s reread(buf=%*ph count=%0zx) -> ret=%d\n", __func__,
(int)min_t(size_t, 64, expected_len), buf, count,
expected_len);
@@ -106,13 +106,13 @@ static int i2c_atmel_recv(struct tpm_chip *chip, u8 *buf, size_t count)
static void i2c_atmel_cancel(struct tpm_chip *chip)
{
- dev_err(chip->dev, "TPM operation cancellation was requested, but is not supported");
+ dev_err(chip->pdev, "TPM operation cancellation was requested, but is not supported");
}
static u8 i2c_atmel_read_status(struct tpm_chip *chip)
{
struct priv_data *priv = chip->vendor.priv;
- struct i2c_client *client = to_i2c_client(chip->dev);
+ struct i2c_client *client = to_i2c_client(chip->pdev);
int rc;
/* The TPM fails the I2C read until it is ready, so we do the entire
@@ -125,7 +125,7 @@ static u8 i2c_atmel_read_status(struct tpm_chip *chip)
/* Once the TPM has completed the command the command remains readable
* until another command is issued. */
rc = i2c_master_recv(client, priv->buffer, sizeof(priv->buffer));
- dev_dbg(chip->dev,
+ dev_dbg(chip->pdev,
"%s: sts=%d", __func__, rc);
if (rc <= 0)
return 0;
diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
index 03708e6..33c5f36 100644
--- a/drivers/char/tpm/tpm_i2c_infineon.c
+++ b/drivers/char/tpm/tpm_i2c_infineon.c
@@ -446,7 +446,7 @@ static int tpm_tis_i2c_recv(struct tpm_chip *chip, u8 *buf, size_t count)
/* read first 10 bytes, including tag, paramsize, and result */
size = recv_data(chip, buf, TPM_HEADER_SIZE);
if (size < TPM_HEADER_SIZE) {
- dev_err(chip->dev, "Unable to read header\n");
+ dev_err(chip->pdev, "Unable to read header\n");
goto out;
}
@@ -459,14 +459,14 @@ static int tpm_tis_i2c_recv(struct tpm_chip *chip, u8 *buf, size_t count)
size += recv_data(chip, &buf[TPM_HEADER_SIZE],
expected - TPM_HEADER_SIZE);
if (size < expected) {
- dev_err(chip->dev, "Unable to read remainder of result\n");
+ dev_err(chip->pdev, "Unable to read remainder of result\n");
size = -ETIME;
goto out;
}
wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c, &status);
if (status & TPM_STS_DATA_AVAIL) { /* retry? */
- dev_err(chip->dev, "Error left over data\n");
+ dev_err(chip->pdev, "Error left over data\n");
size = -EIO;
goto out;
}
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index 8c23088..e1eadb0 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -96,13 +96,13 @@ static s32 i2c_nuvoton_write_buf(struct i2c_client *client, u8 offset, u8 size,
/* read TPM_STS register */
static u8 i2c_nuvoton_read_status(struct tpm_chip *chip)
{
- struct i2c_client *client = to_i2c_client(chip->dev);
+ struct i2c_client *client = to_i2c_client(chip->pdev);
s32 status;
u8 data;
status = i2c_nuvoton_read_buf(client, TPM_STS, 1, &data);
if (status <= 0) {
- dev_err(chip->dev, "%s() error return %d\n", __func__,
+ dev_err(chip->pdev, "%s() error return %d\n", __func__,
status);
data = TPM_STS_ERR_VAL;
}
@@ -127,13 +127,13 @@ static s32 i2c_nuvoton_write_status(struct i2c_client *client, u8 data)
/* write commandReady to TPM_STS register */
static void i2c_nuvoton_ready(struct tpm_chip *chip)
{
- struct i2c_client *client = to_i2c_client(chip->dev);
+ struct i2c_client *client = to_i2c_client(chip->pdev);
s32 status;
/* this causes the current command to be aborted */
status = i2c_nuvoton_write_status(client, TPM_STS_COMMAND_READY);
if (status < 0)
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"%s() fail to write TPM_STS.commandReady\n", __func__);
}
@@ -212,7 +212,7 @@ static int i2c_nuvoton_wait_for_stat(struct tpm_chip *chip, u8 mask, u8 value,
return 0;
} while (time_before(jiffies, stop));
}
- dev_err(chip->dev, "%s(%02x, %02x) -> timeout\n", __func__, mask,
+ dev_err(chip->pdev, "%s(%02x, %02x) -> timeout\n", __func__, mask,
value);
return -ETIMEDOUT;
}
@@ -240,7 +240,7 @@ static int i2c_nuvoton_recv_data(struct i2c_client *client,
&chip->vendor.read_queue) == 0) {
burst_count = i2c_nuvoton_get_burstcount(client, chip);
if (burst_count < 0) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"%s() fail to read burstCount=%d\n", __func__,
burst_count);
return -EIO;
@@ -249,12 +249,12 @@ static int i2c_nuvoton_recv_data(struct i2c_client *client,
rc = i2c_nuvoton_read_buf(client, TPM_DATA_FIFO_R,
bytes2read, &buf[size]);
if (rc < 0) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"%s() fail on i2c_nuvoton_read_buf()=%d\n",
__func__, rc);
return -EIO;
}
- dev_dbg(chip->dev, "%s(%d):", __func__, bytes2read);
+ dev_dbg(chip->pdev, "%s(%d):", __func__, bytes2read);
size += bytes2read;
}
@@ -264,7 +264,7 @@ static int i2c_nuvoton_recv_data(struct i2c_client *client,
/* Read TPM command results */
static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count)
{
- struct device *dev = chip->dev;
+ struct device *dev = chip->pdev;
struct i2c_client *client = to_i2c_client(dev);
s32 rc;
int expected, status, burst_count, retries, size = 0;
@@ -334,7 +334,7 @@ static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count)
break;
}
i2c_nuvoton_ready(chip);
- dev_dbg(chip->dev, "%s() -> %d\n", __func__, size);
+ dev_dbg(chip->pdev, "%s() -> %d\n", __func__, size);
return size;
}
@@ -347,7 +347,7 @@ static int i2c_nuvoton_recv(struct tpm_chip *chip, u8 *buf, size_t count)
*/
static int i2c_nuvoton_send(struct tpm_chip *chip, u8 *buf, size_t len)
{
- struct device *dev = chip->dev;
+ struct device *dev = chip->pdev;
struct i2c_client *client = to_i2c_client(dev);
u32 ordinal;
size_t count = 0;
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index 9a96d37..fc824ae 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -588,7 +588,7 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
size = recv_data(chip, buf, TPM_HEADER_SIZE);
if (size < TPM_HEADER_SIZE) {
- dev_err(chip->dev, "Unable to read header\n");
+ dev_err(chip->pdev, "Unable to read header\n");
goto out;
}
@@ -601,7 +601,7 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
size += recv_data(chip, &buf[TPM_HEADER_SIZE],
expected - TPM_HEADER_SIZE);
if (size < expected) {
- dev_err(chip->dev, "Unable to read remainder of result\n");
+ dev_err(chip->pdev, "Unable to read remainder of result\n");
size = -ETIME;
goto out;
}
@@ -639,7 +639,7 @@ static int tpm_stm_i2c_of_request_resources(struct tpm_chip *chip)
pp = client->dev.of_node;
if (!pp) {
- dev_err(chip->dev, "No platform data\n");
+ dev_err(chip->pdev, "No platform data\n");
return -ENODEV;
}
@@ -682,7 +682,7 @@ static int tpm_stm_i2c_request_resources(struct i2c_client *client,
pdata = client->dev.platform_data;
if (!pdata) {
- dev_err(chip->dev, "No platform data\n");
+ dev_err(chip->pdev, "No platform data\n");
return -ENODEV;
}
@@ -694,7 +694,7 @@ static int tpm_stm_i2c_request_resources(struct i2c_client *client,
pdata->io_lpcpd, GPIOF_OUT_INIT_HIGH,
"TPM IO_LPCPD");
if (ret) {
- dev_err(chip->dev, "%s : reset gpio_request failed\n",
+ dev_err(chip->pdev, "%s : reset gpio_request failed\n",
__FILE__);
return ret;
}
@@ -776,7 +776,7 @@ tpm_stm_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
IRQF_TRIGGER_HIGH,
"TPM SERIRQ management", chip);
if (ret < 0) {
- dev_err(chip->dev , "TPM SERIRQ signals %d not available\n",
+ dev_err(chip->pdev , "TPM SERIRQ signals %d not available\n",
client->irq);
goto _tpm_clean_answer;
}
@@ -807,7 +807,7 @@ tpm_stm_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
return tpm_chip_register(chip);
_tpm_clean_answer:
- dev_info(chip->dev, "TPM I2C initialisation fail\n");
+ dev_info(chip->pdev, "TPM I2C initialisation fail\n");
return ret;
}
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index dcdb671..6d49213 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -195,9 +195,9 @@ static int wait(struct tpm_chip *chip, int wait_for_bit)
}
if (i == TPM_MAX_TRIES) { /* timeout occurs */
if (wait_for_bit == STAT_XFE)
- dev_err(chip->dev, "Timeout in wait(STAT_XFE)\n");
+ dev_err(chip->pdev, "Timeout in wait(STAT_XFE)\n");
if (wait_for_bit == STAT_RDA)
- dev_err(chip->dev, "Timeout in wait(STAT_RDA)\n");
+ dev_err(chip->pdev, "Timeout in wait(STAT_RDA)\n");
return -EIO;
}
return 0;
@@ -220,7 +220,7 @@ static void wait_and_send(struct tpm_chip *chip, u8 sendbyte)
static void tpm_wtx(struct tpm_chip *chip)
{
number_of_wtx++;
- dev_info(chip->dev, "Granting WTX (%02d / %02d)\n",
+ dev_info(chip->pdev, "Granting WTX (%02d / %02d)\n",
number_of_wtx, TPM_MAX_WTX_PACKAGES);
wait_and_send(chip, TPM_VL_VER);
wait_and_send(chip, TPM_CTRL_WTX);
@@ -231,7 +231,7 @@ static void tpm_wtx(struct tpm_chip *chip)
static void tpm_wtx_abort(struct tpm_chip *chip)
{
- dev_info(chip->dev, "Aborting WTX\n");
+ dev_info(chip->pdev, "Aborting WTX\n");
wait_and_send(chip, TPM_VL_VER);
wait_and_send(chip, TPM_CTRL_WTX_ABORT);
wait_and_send(chip, 0x00);
@@ -257,7 +257,7 @@ recv_begin:
}
if (buf[0] != TPM_VL_VER) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"Wrong transport protocol implementation!\n");
return -EIO;
}
@@ -272,7 +272,7 @@ recv_begin:
}
if ((size == 0x6D00) && (buf[1] == 0x80)) {
- dev_err(chip->dev, "Error handling on vendor layer!\n");
+ dev_err(chip->pdev, "Error handling on vendor layer!\n");
return -EIO;
}
@@ -284,7 +284,7 @@ recv_begin:
}
if (buf[1] == TPM_CTRL_WTX) {
- dev_info(chip->dev, "WTX-package received\n");
+ dev_info(chip->pdev, "WTX-package received\n");
if (number_of_wtx < TPM_MAX_WTX_PACKAGES) {
tpm_wtx(chip);
goto recv_begin;
@@ -295,14 +295,14 @@ recv_begin:
}
if (buf[1] == TPM_CTRL_WTX_ABORT_ACK) {
- dev_info(chip->dev, "WTX-abort acknowledged\n");
+ dev_info(chip->pdev, "WTX-abort acknowledged\n");
return size;
}
if (buf[1] == TPM_CTRL_ERROR) {
- dev_err(chip->dev, "ERROR-package received:\n");
+ dev_err(chip->pdev, "ERROR-package received:\n");
if (buf[4] == TPM_INF_NAK)
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"-> Negative acknowledgement"
" - retransmit command!\n");
return -EIO;
@@ -321,7 +321,7 @@ static int tpm_inf_send(struct tpm_chip *chip, u8 * buf, size_t count)
ret = empty_fifo(chip, 1);
if (ret) {
- dev_err(chip->dev, "Timeout while clearing FIFO\n");
+ dev_err(chip->pdev, "Timeout while clearing FIFO\n");
return -EIO;
}
diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c
index 00c5470..072c298 100644
--- a/drivers/char/tpm/tpm_nsc.c
+++ b/drivers/char/tpm/tpm_nsc.c
@@ -113,7 +113,7 @@ static int nsc_wait_for_ready(struct tpm_chip *chip)
}
while (time_before(jiffies, stop));
- dev_info(chip->dev, "wait for ready failed\n");
+ dev_info(chip->pdev, "wait for ready failed\n");
return -EBUSY;
}
@@ -129,12 +129,12 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
return -EIO;
if (wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0) {
- dev_err(chip->dev, "F0 timeout\n");
+ dev_err(chip->pdev, "F0 timeout\n");
return -EIO;
}
if ((data =
inb(chip->vendor.base + NSC_DATA)) != NSC_COMMAND_NORMAL) {
- dev_err(chip->dev, "not in normal mode (0x%x)\n",
+ dev_err(chip->pdev, "not in normal mode (0x%x)\n",
data);
return -EIO;
}
@@ -143,7 +143,7 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
for (p = buffer; p < &buffer[count]; p++) {
if (wait_for_stat
(chip, NSC_STATUS_OBF, NSC_STATUS_OBF, &data) < 0) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"OBF timeout (while reading data)\n");
return -EIO;
}
@@ -154,11 +154,11 @@ static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
if ((data & NSC_STATUS_F0) == 0 &&
(wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0)) {
- dev_err(chip->dev, "F0 not set\n");
+ dev_err(chip->pdev, "F0 not set\n");
return -EIO;
}
if ((data = inb(chip->vendor.base + NSC_DATA)) != NSC_COMMAND_EOC) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"expected end of command(0x%x)\n", data);
return -EIO;
}
@@ -189,19 +189,19 @@ static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count)
return -EIO;
if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
- dev_err(chip->dev, "IBF timeout\n");
+ dev_err(chip->pdev, "IBF timeout\n");
return -EIO;
}
outb(NSC_COMMAND_NORMAL, chip->vendor.base + NSC_COMMAND);
if (wait_for_stat(chip, NSC_STATUS_IBR, NSC_STATUS_IBR, &data) < 0) {
- dev_err(chip->dev, "IBR timeout\n");
+ dev_err(chip->pdev, "IBR timeout\n");
return -EIO;
}
for (i = 0; i < count; i++) {
if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
- dev_err(chip->dev,
+ dev_err(chip->pdev,
"IBF timeout (while writing data)\n");
return -EIO;
}
@@ -209,7 +209,7 @@ static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count)
}
if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
- dev_err(chip->dev, "IBF timeout\n");
+ dev_err(chip->pdev, "IBF timeout\n");
return -EIO;
}
outb(NSC_COMMAND_EOC, chip->vendor.base + NSC_COMMAND);
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index 6652025..d8d51ff 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -357,11 +357,11 @@ int tpm_add_ppi(struct tpm_chip *chip)
ACPI_FREE(obj);
- return sysfs_create_group(&chip->dev->kobj, &ppi_attr_grp);
+ return sysfs_create_group(&chip->pdev->kobj, &ppi_attr_grp);
}
void tpm_remove_ppi(struct tpm_chip *chip)
{
if (chip->ppi_version[0] != '\0')
- sysfs_remove_group(&chip->dev->kobj, &ppi_attr_grp);
+ sysfs_remove_group(&chip->pdev->kobj, &ppi_attr_grp);
}
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index e4a3b9c..6b15545 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -242,7 +242,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
/* read first 10 bytes, including tag, paramsize, and result */
if ((size =
recv_data(chip, buf, TPM_HEADER_SIZE)) < TPM_HEADER_SIZE) {
- dev_err(chip->dev, "Unable to read header\n");
+ dev_err(chip->pdev, "Unable to read header\n");
goto out;
}
@@ -255,7 +255,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
if ((size +=
recv_data(chip, &buf[TPM_HEADER_SIZE],
expected - TPM_HEADER_SIZE)) < expected) {
- dev_err(chip->dev, "Unable to read remainder of result\n");
+ dev_err(chip->pdev, "Unable to read remainder of result\n");
size = -ETIME;
goto out;
}
@@ -264,7 +264,7 @@ static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
&chip->vendor.int_queue, false);
status = tpm_tis_status(chip);
if (status & TPM_STS_DATA_AVAIL) { /* retry? */
- dev_err(chip->dev, "Error left over data\n");
+ dev_err(chip->pdev, "Error left over data\n");
size = -EIO;
goto out;
}
@@ -406,7 +406,7 @@ static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len)
msleep(1);
if (!priv->irq_tested) {
disable_interrupts(chip);
- dev_err(chip->dev,
+ dev_err(chip->pdev,
FW_BUG "TPM interrupt not working, polling instead\n");
}
priv->irq_tested = true;
@@ -476,7 +476,7 @@ static int probe_itpm(struct tpm_chip *chip)
rc = tpm_tis_send_data(chip, cmd_getticks, len);
if (rc == 0) {
- dev_info(chip->dev, "Detected an iTPM.\n");
+ dev_info(chip->pdev, "Detected an iTPM.\n");
rc = 1;
} else
rc = -EFAULT;
@@ -699,7 +699,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
if (devm_request_irq
(dev, i, tis_int_probe, IRQF_SHARED,
chip->vendor.miscdev.name, chip) != 0) {
- dev_info(chip->dev,
+ dev_info(chip->pdev,
"Unable to request irq: %d for probe\n",
i);
continue;
@@ -746,7 +746,7 @@ static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
if (devm_request_irq
(dev, chip->vendor.irq, tis_int_handler, IRQF_SHARED,
chip->vendor.miscdev.name, chip) != 0) {
- dev_info(chip->dev,
+ dev_info(chip->pdev,
"Unable to request irq: %d for use\n",
chip->vendor.irq);
chip->vendor.irq = 0;
--
2.1.0
^ permalink raw reply related
* [PATCH v9 3/8] tpm: fix raciness of PPI interface lookup
From: Jarkko Sakkinen @ 2014-12-04 5:55 UTC (permalink / raw)
To: Peter Huewe, Ashley Lai, Marcel Selhorst
Cc: tpmdd-devel, linux-kernel, josh.triplett, christophe.ricard,
jason.gunthorpe, linux-api, trousers-tech, Jarkko Sakkinen
In-Reply-To: <1417672518-4530-1-git-send-email-jarkko.sakkinen@linux.intel.com>
Traversal of the ACPI device tree was not done right. PPI interface
should be looked up only from the ACPI device that is the platform
device for the TPM. This could cause problems with systems with
two TPM chips such as 4th gen Intel systems.
In addition, added the missing license and copyright platter to
the tpm_ppi.c.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
drivers/char/tpm/tpm-chip.c | 2 +-
drivers/char/tpm/tpm.h | 16 ++++--
drivers/char/tpm/tpm_ppi.c | 137 +++++++++++++++++++++++++++-----------------
drivers/char/tpm/tpm_tis.c | 14 +++--
4 files changed, 106 insertions(+), 63 deletions(-)
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
index 35aca12..543939b 100644
--- a/drivers/char/tpm/tpm-chip.c
+++ b/drivers/char/tpm/tpm-chip.c
@@ -147,7 +147,7 @@ int tpm_chip_register(struct tpm_chip *chip)
if (rc)
goto del_misc;
- rc = tpm_add_ppi(&chip->dev->kobj);
+ rc = tpm_add_ppi(chip);
if (rc)
goto del_sysfs;
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index 9880681..69f4003 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -27,6 +27,7 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/tpm.h>
+#include <linux/acpi.h>
enum tpm_const {
TPM_MINOR = 224, /* officially assigned */
@@ -94,6 +95,8 @@ struct tpm_vendor_specific {
#define TPM_VID_WINBOND 0x1050
#define TPM_VID_STM 0x104A
+#define TPM_PPI_VERSION_LEN 3
+
struct tpm_chip {
struct device *dev; /* Device stuff */
const struct tpm_class_ops *ops;
@@ -109,6 +112,11 @@ struct tpm_chip {
struct dentry **bios_dir;
+#ifdef CONFIG_ACPI
+ acpi_handle acpi_dev_handle;
+ char ppi_version[TPM_PPI_VERSION_LEN + 1];
+#endif /* CONFIG_ACPI */
+
struct list_head list;
};
@@ -340,15 +348,15 @@ void tpm_sysfs_del_device(struct tpm_chip *chip);
int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
#ifdef CONFIG_ACPI
-extern int tpm_add_ppi(struct kobject *);
-extern void tpm_remove_ppi(struct kobject *);
+extern int tpm_add_ppi(struct tpm_chip *chip);
+extern void tpm_remove_ppi(struct tpm_chip *chip);
#else
-static inline int tpm_add_ppi(struct kobject *parent)
+static inline int tpm_add_ppi(struct tpm_chip *chip)
{
return 0;
}
-static inline void tpm_remove_ppi(struct kobject *parent)
+static inline void tpm_remove_ppi(struct tpm_chip *chip)
{
}
#endif
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index 61dcc80..6652025 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -1,3 +1,22 @@
+/*
+ * Copyright (C) 2012-2014 Intel Corporation
+ *
+ * Authors:
+ * Xiaoyan Zhang <xiaoyan.zhang@intel.com>
+ * Jiang Liu <jiang.liu@linux.intel.com>
+ * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
+ *
+ * Maintained by: <tpmdd-devel@lists.sourceforge.net>
+ *
+ * This file contains implementation of the sysfs interface for PPI.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+
+
#include <linux/acpi.h>
#include "tpm.h"
@@ -12,7 +31,6 @@
#define PPI_TPM_REQ_MAX 22
#define PPI_VS_REQ_START 128
#define PPI_VS_REQ_END 255
-#define PPI_VERSION_LEN 3
static const u8 tpm_ppi_uuid[] = {
0xA6, 0xFA, 0xDD, 0x3D,
@@ -22,45 +40,22 @@ static const u8 tpm_ppi_uuid[] = {
0x8D, 0x10, 0x08, 0x9D, 0x16, 0x53
};
-static char tpm_ppi_version[PPI_VERSION_LEN + 1];
-static acpi_handle tpm_ppi_handle;
-
-static acpi_status ppi_callback(acpi_handle handle, u32 level, void *context,
- void **return_value)
-{
- union acpi_object *obj;
-
- if (!acpi_check_dsm(handle, tpm_ppi_uuid, TPM_PPI_REVISION_ID,
- 1 << TPM_PPI_FN_VERSION))
- return AE_OK;
-
- /* Cache version string */
- obj = acpi_evaluate_dsm_typed(handle, tpm_ppi_uuid,
- TPM_PPI_REVISION_ID, TPM_PPI_FN_VERSION,
- NULL, ACPI_TYPE_STRING);
- if (obj) {
- strlcpy(tpm_ppi_version, obj->string.pointer,
- PPI_VERSION_LEN + 1);
- ACPI_FREE(obj);
- }
-
- *return_value = handle;
-
- return AE_CTRL_TERMINATE;
-}
-
static inline union acpi_object *
-tpm_eval_dsm(int func, acpi_object_type type, union acpi_object *argv4)
+tpm_eval_dsm(acpi_handle ppi_handle, int func, acpi_object_type type,
+ union acpi_object *argv4)
{
- BUG_ON(!tpm_ppi_handle);
- return acpi_evaluate_dsm_typed(tpm_ppi_handle, tpm_ppi_uuid,
- TPM_PPI_REVISION_ID, func, argv4, type);
+ BUG_ON(!ppi_handle);
+ return acpi_evaluate_dsm_typed(ppi_handle, tpm_ppi_uuid,
+ TPM_PPI_REVISION_ID,
+ func, argv4, type);
}
static ssize_t tpm_show_ppi_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return scnprintf(buf, PAGE_SIZE, "%s\n", tpm_ppi_version);
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+
+ return scnprintf(buf, PAGE_SIZE, "%s\n", chip->ppi_version);
}
static ssize_t tpm_show_ppi_request(struct device *dev,
@@ -68,8 +63,10 @@ static ssize_t tpm_show_ppi_request(struct device *dev,
{
ssize_t size = -EINVAL;
union acpi_object *obj;
+ struct tpm_chip *chip = dev_get_drvdata(dev);
- obj = tpm_eval_dsm(TPM_PPI_FN_GETREQ, ACPI_TYPE_PACKAGE, NULL);
+ obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETREQ,
+ ACPI_TYPE_PACKAGE, NULL);
if (!obj)
return -ENXIO;
@@ -103,14 +100,15 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
int func = TPM_PPI_FN_SUBREQ;
union acpi_object *obj, tmp;
union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
+ struct tpm_chip *chip = dev_get_drvdata(dev);
/*
* the function to submit TPM operation request to pre-os environment
* is updated with function index from SUBREQ to SUBREQ2 since PPI
* version 1.1
*/
- if (acpi_check_dsm(tpm_ppi_handle, tpm_ppi_uuid, TPM_PPI_REVISION_ID,
- 1 << TPM_PPI_FN_SUBREQ2))
+ if (acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
+ TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_SUBREQ2))
func = TPM_PPI_FN_SUBREQ2;
/*
@@ -119,7 +117,7 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
* string/package type. For PPI version 1.0 and 1.1, use buffer type
* for compatibility, and use package type since 1.2 according to spec.
*/
- if (strcmp(tpm_ppi_version, "1.2") < 0) {
+ if (strcmp(chip->ppi_version, "1.2") < 0) {
if (sscanf(buf, "%d", &req) != 1)
return -EINVAL;
argv4.type = ACPI_TYPE_BUFFER;
@@ -131,7 +129,8 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
return -EINVAL;
}
- obj = tpm_eval_dsm(func, ACPI_TYPE_INTEGER, &argv4);
+ obj = tpm_eval_dsm(chip->acpi_dev_handle, func, ACPI_TYPE_INTEGER,
+ &argv4);
if (!obj) {
return -ENXIO;
} else {
@@ -157,6 +156,7 @@ static ssize_t tpm_show_ppi_transition_action(struct device *dev,
.buffer.length = 0,
.buffer.pointer = NULL
};
+ struct tpm_chip *chip = dev_get_drvdata(dev);
static char *info[] = {
"None",
@@ -171,9 +171,10 @@ static ssize_t tpm_show_ppi_transition_action(struct device *dev,
* (e.g. Capella with PPI 1.0) need integer/string/buffer type, so for
* compatibility, define params[3].type as buffer, if PPI version < 1.2
*/
- if (strcmp(tpm_ppi_version, "1.2") < 0)
+ if (strcmp(chip->ppi_version, "1.2") < 0)
obj = &tmp;
- obj = tpm_eval_dsm(TPM_PPI_FN_GETACT, ACPI_TYPE_INTEGER, obj);
+ obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETACT,
+ ACPI_TYPE_INTEGER, obj);
if (!obj) {
return -ENXIO;
} else {
@@ -196,8 +197,10 @@ static ssize_t tpm_show_ppi_response(struct device *dev,
acpi_status status = -EINVAL;
union acpi_object *obj, *ret_obj;
u64 req, res;
+ struct tpm_chip *chip = dev_get_drvdata(dev);
- obj = tpm_eval_dsm(TPM_PPI_FN_GETRSP, ACPI_TYPE_PACKAGE, NULL);
+ obj = tpm_eval_dsm(chip->acpi_dev_handle, TPM_PPI_FN_GETRSP,
+ ACPI_TYPE_PACKAGE, NULL);
if (!obj)
return -ENXIO;
@@ -248,7 +251,8 @@ cleanup:
return status;
}
-static ssize_t show_ppi_operations(char *buf, u32 start, u32 end)
+static ssize_t show_ppi_operations(acpi_handle dev_handle, char *buf, u32 start,
+ u32 end)
{
int i;
u32 ret;
@@ -264,14 +268,15 @@ static ssize_t show_ppi_operations(char *buf, u32 start, u32 end)
"User not required",
};
- if (!acpi_check_dsm(tpm_ppi_handle, tpm_ppi_uuid, TPM_PPI_REVISION_ID,
+ if (!acpi_check_dsm(dev_handle, tpm_ppi_uuid, TPM_PPI_REVISION_ID,
1 << TPM_PPI_FN_GETOPR))
return -EPERM;
tmp.integer.type = ACPI_TYPE_INTEGER;
for (i = start; i <= end; i++) {
tmp.integer.value = i;
- obj = tpm_eval_dsm(TPM_PPI_FN_GETOPR, ACPI_TYPE_INTEGER, &argv);
+ obj = tpm_eval_dsm(dev_handle, TPM_PPI_FN_GETOPR,
+ ACPI_TYPE_INTEGER, &argv);
if (!obj) {
return -ENOMEM;
} else {
@@ -291,14 +296,20 @@ static ssize_t tpm_show_ppi_tcg_operations(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return show_ppi_operations(buf, 0, PPI_TPM_REQ_MAX);
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+
+ return show_ppi_operations(chip->acpi_dev_handle, buf, 0,
+ PPI_TPM_REQ_MAX);
}
static ssize_t tpm_show_ppi_vs_operations(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- return show_ppi_operations(buf, PPI_VS_REQ_START, PPI_VS_REQ_END);
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+
+ return show_ppi_operations(chip->acpi_dev_handle, buf, PPI_VS_REQ_START,
+ PPI_VS_REQ_END);
}
static DEVICE_ATTR(version, S_IRUGO, tpm_show_ppi_version, NULL);
@@ -323,16 +334,34 @@ static struct attribute_group ppi_attr_grp = {
.attrs = ppi_attrs
};
-int tpm_add_ppi(struct kobject *parent)
+int tpm_add_ppi(struct tpm_chip *chip)
{
- /* Cache TPM ACPI handle and version string */
- acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
- ppi_callback, NULL, NULL, &tpm_ppi_handle);
- return tpm_ppi_handle ? sysfs_create_group(parent, &ppi_attr_grp) : 0;
+ union acpi_object *obj;
+
+ if (!chip->acpi_dev_handle)
+ return 0;
+
+ if (!acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
+ TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_VERSION))
+ return 0;
+
+ /* Cache PPI version string. */
+ obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, tpm_ppi_uuid,
+ TPM_PPI_REVISION_ID, TPM_PPI_FN_VERSION,
+ NULL, ACPI_TYPE_STRING);
+ if (!obj)
+ return -ENOMEM;
+
+ strlcpy(chip->ppi_version, obj->string.pointer,
+ sizeof(chip->ppi_version));
+
+ ACPI_FREE(obj);
+
+ return sysfs_create_group(&chip->dev->kobj, &ppi_attr_grp);
}
-void tpm_remove_ppi(struct kobject *parent)
+void tpm_remove_ppi(struct tpm_chip *chip)
{
- if (tpm_ppi_handle)
- sysfs_remove_group(parent, &ppi_attr_grp);
+ if (chip->ppi_version[0] != '\0')
+ sysfs_remove_group(&chip->dev->kobj, &ppi_attr_grp);
}
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 4cf2ea2..e4a3b9c 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -580,8 +580,9 @@ static void tpm_tis_remove(struct tpm_chip *chip)
release_locality(chip, chip->vendor.locality, 1);
}
-static int tpm_tis_init(struct device *dev, resource_size_t start,
- resource_size_t len, unsigned int irq)
+static int tpm_tis_init(struct device *dev, acpi_handle acpi_dev_handle,
+ resource_size_t start, resource_size_t len,
+ unsigned int irq)
{
u32 vendor, intfcaps, intmask;
int rc, i, irq_s, irq_e, probe;
@@ -597,6 +598,7 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
return PTR_ERR(chip);
chip->vendor.priv = priv;
+ chip->acpi_dev_handle = acpi_dev_handle;
chip->vendor.iobase = devm_ioremap(dev, start, len);
if (!chip->vendor.iobase)
@@ -827,6 +829,7 @@ static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
{
resource_size_t start, len;
unsigned int irq = 0;
+ acpi_handle acpi_dev_handle = NULL;
start = pnp_mem_start(pnp_dev, 0);
len = pnp_mem_len(pnp_dev, 0);
@@ -839,7 +842,10 @@ static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
if (is_itpm(pnp_dev))
itpm = true;
- return tpm_tis_init(&pnp_dev->dev, start, len, irq);
+ if (pnp_acpi_device(pnp_dev))
+ acpi_dev_handle = pnp_acpi_device(pnp_dev)->handle;
+
+ return tpm_tis_init(&pnp_dev->dev, acpi_dev_handle, start, len, irq);
}
static struct pnp_device_id tpm_pnp_tbl[] = {
@@ -908,7 +914,7 @@ static int __init init_tis(void)
rc = PTR_ERR(pdev);
goto err_dev;
}
- rc = tpm_tis_init(&pdev->dev, TIS_MEM_BASE, TIS_MEM_LEN, 0);
+ rc = tpm_tis_init(&pdev->dev, NULL, TIS_MEM_BASE, TIS_MEM_LEN, 0);
if (rc)
goto err_init;
return 0;
--
2.1.0
^ permalink raw reply related
* [PATCH v9 2/8] tpm: two-phase chip management functions
From: Jarkko Sakkinen @ 2014-12-04 5:55 UTC (permalink / raw)
To: Peter Huewe, Ashley Lai, Marcel Selhorst
Cc: tpmdd-devel, linux-kernel, josh.triplett, christophe.ricard,
jason.gunthorpe, linux-api, trousers-tech, Jarkko Sakkinen
In-Reply-To: <1417672518-4530-1-git-send-email-jarkko.sakkinen@linux.intel.com>
tpm_register_hardware() and tpm_remove_hardware() are called often
before initializing the device. The problem is that the device might
not be fully initialized when it comes visible to the user space.
This patch resolves the issue by diving initialization into two
parts:
- tpmm_chip_alloc() creates struct tpm_chip.
- tpm_chip_register() sets up the character device and sysfs
attributes.
The framework takes care of freeing struct tpm_chip by using the devres
API. The broken release callback has been wiped. ACPI drivers do not
ever get this callback.
Regards to Jason Gunthorpe for carefully reviewing this part of the
code.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
drivers/char/tpm/Makefile | 2 +-
drivers/char/tpm/tpm-chip.c | 194 ++++++++++++++++++++++++++++++++++++
drivers/char/tpm/tpm-interface.c | 148 +--------------------------
drivers/char/tpm/tpm.h | 11 +-
drivers/char/tpm/tpm_atmel.c | 11 +-
drivers/char/tpm/tpm_i2c_atmel.c | 39 ++------
drivers/char/tpm/tpm_i2c_infineon.c | 37 ++-----
drivers/char/tpm/tpm_i2c_nuvoton.c | 47 +++------
drivers/char/tpm/tpm_i2c_stm_st33.c | 14 +--
drivers/char/tpm/tpm_ibmvtpm.c | 17 ++--
drivers/char/tpm/tpm_infineon.c | 29 +++---
drivers/char/tpm/tpm_nsc.c | 14 ++-
drivers/char/tpm/tpm_tis.c | 80 ++++++---------
drivers/char/tpm/xen-tpmfront.c | 14 +--
14 files changed, 319 insertions(+), 338 deletions(-)
create mode 100644 drivers/char/tpm/tpm-chip.c
diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
index 7f54dae..c715596 100644
--- a/drivers/char/tpm/Makefile
+++ b/drivers/char/tpm/Makefile
@@ -2,7 +2,7 @@
# Makefile for the kernel tpm device drivers.
#
obj-$(CONFIG_TCG_TPM) += tpm.o
-tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o
+tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o
tpm-$(CONFIG_ACPI) += tpm_ppi.o
ifdef CONFIG_ACPI
diff --git a/drivers/char/tpm/tpm-chip.c b/drivers/char/tpm/tpm-chip.c
new file mode 100644
index 0000000..35aca12
--- /dev/null
+++ b/drivers/char/tpm/tpm-chip.c
@@ -0,0 +1,194 @@
+/*
+ * Copyright (C) 2004 IBM Corporation
+ * Copyright (C) 2014 Intel Corporation
+ *
+ * Authors:
+ * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
+ * Leendert van Doorn <leendert@watson.ibm.com>
+ * Dave Safford <safford@watson.ibm.com>
+ * Reiner Sailer <sailer@watson.ibm.com>
+ * Kylene Hall <kjhall@us.ibm.com>
+ *
+ * Maintained by: <tpmdd-devel@lists.sourceforge.net>
+ *
+ * TPM chip management routines.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2 of the
+ * License.
+ *
+ */
+
+#include <linux/poll.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/freezer.h>
+#include "tpm.h"
+#include "tpm_eventlog.h"
+
+static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
+static LIST_HEAD(tpm_chip_list);
+static DEFINE_SPINLOCK(driver_lock);
+
+/*
+ * tpm_chip_find_get - return tpm_chip for a given chip number
+ * @chip_num the device number for the chip
+ */
+struct tpm_chip *tpm_chip_find_get(int chip_num)
+{
+ struct tpm_chip *pos, *chip = NULL;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(pos, &tpm_chip_list, list) {
+ if (chip_num != TPM_ANY_NUM && chip_num != pos->dev_num)
+ continue;
+
+ if (try_module_get(pos->dev->driver->owner)) {
+ chip = pos;
+ break;
+ }
+ }
+ rcu_read_unlock();
+ return chip;
+}
+
+/**
+ * tpmm_chip_remove() - free chip memory and device number
+ * @data: points to struct tpm_chip instance
+ *
+ * This is used internally by tpmm_chip_alloc() and called by devres
+ * when the device is released. This function does the opposite of
+ * tpmm_chip_alloc() freeing memory and the device number.
+ */
+static void tpmm_chip_remove(void *data)
+{
+ struct tpm_chip *chip = (struct tpm_chip *) data;
+
+ spin_lock(&driver_lock);
+ clear_bit(chip->dev_num, dev_mask);
+ spin_unlock(&driver_lock);
+ kfree(chip);
+}
+
+/**
+ * tpmm_chip_alloc() - allocate a new struct tpm_chip instance
+ * @dev: device to which the chip is associated
+ * @ops: struct tpm_class_ops instance
+ *
+ * Allocates a new struct tpm_chip instance and assigns a free
+ * device number for it. Caller does not have to worry about
+ * freeing the allocated resources. When the devices is removed
+ * devres calls tpmm_chip_remove() to do the job.
+ */
+struct tpm_chip *tpmm_chip_alloc(struct device *dev,
+ const struct tpm_class_ops *ops)
+{
+ struct tpm_chip *chip;
+
+ chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+ if (chip == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&chip->tpm_mutex);
+ INIT_LIST_HEAD(&chip->list);
+
+ chip->ops = ops;
+
+ spin_lock(&driver_lock);
+ chip->dev_num = find_first_zero_bit(dev_mask, TPM_NUM_DEVICES);
+ spin_unlock(&driver_lock);
+
+ if (chip->dev_num >= TPM_NUM_DEVICES) {
+ dev_err(dev, "No available tpm device numbers\n");
+ kfree(chip);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ set_bit(chip->dev_num, dev_mask);
+
+ scnprintf(chip->devname, sizeof(chip->devname), "tpm%d", chip->dev_num);
+
+ chip->dev = dev;
+ devm_add_action(dev, tpmm_chip_remove, chip);
+ dev_set_drvdata(dev, chip);
+
+ return chip;
+}
+EXPORT_SYMBOL_GPL(tpmm_chip_alloc);
+
+/*
+ * tpm_chip_register() - create a misc driver for the TPM chip
+ * @chip: TPM chip to use.
+ *
+ * Creates a misc driver for the TPM chip and adds sysfs interfaces for
+ * the device, PPI and TCPA. As the last step this function adds the
+ * chip to the list of TPM chips available for use.
+ *
+ * NOTE: This function should be only called after the chip initialization
+ * is complete.
+ *
+ * Called from tpm_<specific>.c probe function only for devices
+ * the driver has determined it should claim. Prior to calling
+ * this function the specific probe function has called pci_enable_device
+ * upon errant exit from this function specific probe function should call
+ * pci_disable_device
+ */
+int tpm_chip_register(struct tpm_chip *chip)
+{
+ int rc;
+
+ rc = tpm_dev_add_device(chip);
+ if (rc)
+ return rc;
+
+ rc = tpm_sysfs_add_device(chip);
+ if (rc)
+ goto del_misc;
+
+ rc = tpm_add_ppi(&chip->dev->kobj);
+ if (rc)
+ goto del_sysfs;
+
+ chip->bios_dir = tpm_bios_log_setup(chip->devname);
+
+ /* Make the chip available. */
+ spin_lock(&driver_lock);
+ list_add_rcu(&chip->list, &tpm_chip_list);
+ spin_unlock(&driver_lock);
+
+ return 0;
+del_sysfs:
+ tpm_sysfs_del_device(chip);
+del_misc:
+ tpm_dev_del_device(chip);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(tpm_chip_register);
+
+/*
+ * tpm_chip_unregister() - release the TPM driver
+ * @chip: TPM chip to use.
+ *
+ * Takes the chip first away from the list of available TPM chips and then
+ * cleans up all the resources reserved by tpm_chip_register().
+ *
+ * NOTE: This function should be only called before deinitializing chip
+ * resources.
+ */
+void tpm_chip_unregister(struct tpm_chip *chip)
+{
+ spin_lock(&driver_lock);
+ list_del_rcu(&chip->list);
+ spin_unlock(&driver_lock);
+ synchronize_rcu();
+
+ if (chip->bios_dir)
+ tpm_bios_log_teardown(chip->bios_dir);
+ tpm_remove_ppi(chip);
+ tpm_sysfs_del_device(chip);
+
+ tpm_dev_del_device(chip);
+}
+EXPORT_SYMBOL_GPL(tpm_chip_unregister);
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index c17aa45..4dbed1e 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2004 IBM Corporation
+ * Copyright (C) 2014 Intel Corporation
*
* Authors:
* Leendert van Doorn <leendert@watson.ibm.com>
@@ -47,10 +48,6 @@ module_param_named(suspend_pcr, tpm_suspend_pcr, uint, 0644);
MODULE_PARM_DESC(suspend_pcr,
"PCR to use for dummy writes to faciltate flush on suspend.");
-static LIST_HEAD(tpm_chip_list);
-static DEFINE_SPINLOCK(driver_lock);
-static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
-
/*
* Array with one entry per ordinal defining the maximum amount
* of time the chip could take to return the result. The ordinal
@@ -639,27 +636,6 @@ static int tpm_continue_selftest(struct tpm_chip *chip)
return rc;
}
-/*
- * tpm_chip_find_get - return tpm_chip for given chip number
- */
-static struct tpm_chip *tpm_chip_find_get(int chip_num)
-{
- struct tpm_chip *pos, *chip = NULL;
-
- rcu_read_lock();
- list_for_each_entry_rcu(pos, &tpm_chip_list, list) {
- if (chip_num != TPM_ANY_NUM && chip_num != pos->dev_num)
- continue;
-
- if (try_module_get(pos->dev->driver->owner)) {
- chip = pos;
- break;
- }
- }
- rcu_read_unlock();
- return chip;
-}
-
#define TPM_ORDINAL_PCRREAD cpu_to_be32(21)
#define READ_PCR_RESULT_SIZE 30
static struct tpm_input_header pcrread_header = {
@@ -887,30 +863,6 @@ again:
}
EXPORT_SYMBOL_GPL(wait_for_tpm_stat);
-void tpm_remove_hardware(struct device *dev)
-{
- struct tpm_chip *chip = dev_get_drvdata(dev);
-
- if (chip == NULL) {
- dev_err(dev, "No device data found\n");
- return;
- }
-
- spin_lock(&driver_lock);
- list_del_rcu(&chip->list);
- spin_unlock(&driver_lock);
- synchronize_rcu();
-
- tpm_dev_del_device(chip);
- tpm_sysfs_del_device(chip);
- tpm_remove_ppi(&dev->kobj);
- tpm_bios_log_teardown(chip->bios_dir);
-
- /* write it this way to be explicit (chip->dev == dev) */
- put_device(chip->dev);
-}
-EXPORT_SYMBOL_GPL(tpm_remove_hardware);
-
#define TPM_ORD_SAVESTATE cpu_to_be32(152)
#define SAVESTATE_RESULT_SIZE 10
@@ -1044,104 +996,6 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
}
EXPORT_SYMBOL_GPL(tpm_get_random);
-/* In case vendor provided release function, call it too.*/
-
-void tpm_dev_vendor_release(struct tpm_chip *chip)
-{
- if (!chip)
- return;
-
- clear_bit(chip->dev_num, dev_mask);
-}
-EXPORT_SYMBOL_GPL(tpm_dev_vendor_release);
-
-
-/*
- * Once all references to platform device are down to 0,
- * release all allocated structures.
- */
-static void tpm_dev_release(struct device *dev)
-{
- struct tpm_chip *chip = dev_get_drvdata(dev);
-
- if (!chip)
- return;
-
- tpm_dev_vendor_release(chip);
-
- chip->release(dev);
- kfree(chip);
-}
-
-/*
- * Called from tpm_<specific>.c probe function only for devices
- * the driver has determined it should claim. Prior to calling
- * this function the specific probe function has called pci_enable_device
- * upon errant exit from this function specific probe function should call
- * pci_disable_device
- */
-struct tpm_chip *tpm_register_hardware(struct device *dev,
- const struct tpm_class_ops *ops)
-{
- struct tpm_chip *chip;
-
- /* Driver specific per-device data */
- chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-
- if (chip == NULL)
- return NULL;
-
- mutex_init(&chip->tpm_mutex);
- INIT_LIST_HEAD(&chip->list);
-
- chip->ops = ops;
- chip->dev_num = find_first_zero_bit(dev_mask, TPM_NUM_DEVICES);
-
- if (chip->dev_num >= TPM_NUM_DEVICES) {
- dev_err(dev, "No available tpm device numbers\n");
- goto out_free;
- }
-
- set_bit(chip->dev_num, dev_mask);
-
- scnprintf(chip->devname, sizeof(chip->devname), "%s%d", "tpm",
- chip->dev_num);
-
- chip->dev = get_device(dev);
- chip->release = dev->release;
- dev->release = tpm_dev_release;
- dev_set_drvdata(dev, chip);
-
- if (tpm_dev_add_device(chip))
- goto put_device;
-
- if (tpm_sysfs_add_device(chip))
- goto del_misc;
-
- if (tpm_add_ppi(&dev->kobj))
- goto del_sysfs;
-
- chip->bios_dir = tpm_bios_log_setup(chip->devname);
-
- /* Make chip available */
- spin_lock(&driver_lock);
- list_add_tail_rcu(&chip->list, &tpm_chip_list);
- spin_unlock(&driver_lock);
-
- return chip;
-
-del_sysfs:
- tpm_sysfs_del_device(chip);
-del_misc:
- tpm_dev_del_device(chip);
-put_device:
- put_device(chip->dev);
-out_free:
- kfree(chip);
- return NULL;
-}
-EXPORT_SYMBOL_GPL(tpm_register_hardware);
-
MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
MODULE_DESCRIPTION("TPM Driver");
MODULE_VERSION("2.0");
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index e638eb0..9880681 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -110,7 +110,6 @@ struct tpm_chip {
struct dentry **bios_dir;
struct list_head list;
- void (*release) (struct device *);
};
#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
@@ -322,15 +321,17 @@ extern int tpm_get_timeouts(struct tpm_chip *);
extern void tpm_gen_interrupt(struct tpm_chip *);
extern int tpm_do_selftest(struct tpm_chip *);
extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
-extern struct tpm_chip* tpm_register_hardware(struct device *,
- const struct tpm_class_ops *ops);
-extern void tpm_dev_vendor_release(struct tpm_chip *);
-extern void tpm_remove_hardware(struct device *);
extern int tpm_pm_suspend(struct device *);
extern int tpm_pm_resume(struct device *);
extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
wait_queue_head_t *, bool);
+struct tpm_chip *tpm_chip_find_get(int chip_num);
+extern struct tpm_chip *tpmm_chip_alloc(struct device *dev,
+ const struct tpm_class_ops *ops);
+extern int tpm_chip_register(struct tpm_chip *chip);
+extern void tpm_chip_unregister(struct tpm_chip *chip);
+
int tpm_dev_add_device(struct tpm_chip *chip);
void tpm_dev_del_device(struct tpm_chip *chip);
int tpm_sysfs_add_device(struct tpm_chip *chip);
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
index 6069d13..8e2576a 100644
--- a/drivers/char/tpm/tpm_atmel.c
+++ b/drivers/char/tpm/tpm_atmel.c
@@ -138,11 +138,11 @@ static void atml_plat_remove(void)
struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
if (chip) {
+ tpm_chip_unregister(chip);
if (chip->vendor.have_region)
atmel_release_region(chip->vendor.base,
chip->vendor.region_size);
atmel_put_base_addr(chip->vendor.iobase);
- tpm_remove_hardware(chip->dev);
platform_device_unregister(pdev);
}
}
@@ -184,8 +184,9 @@ static int __init init_atmel(void)
goto err_rel_reg;
}
- if (!(chip = tpm_register_hardware(&pdev->dev, &tpm_atmel))) {
- rc = -ENODEV;
+ chip = tpmm_chip_alloc(&pdev->dev, &tpm_atmel);
+ if (IS_ERR(chip)) {
+ rc = PTR_ERR(chip);
goto err_unreg_dev;
}
@@ -194,6 +195,10 @@ static int __init init_atmel(void)
chip->vendor.have_region = have_region;
chip->vendor.region_size = region_size;
+ rc = tpm_chip_register(chip);
+ if (rc)
+ goto err_unreg_dev;
+
return 0;
err_unreg_dev:
diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c
index 5f44888..643a940 100644
--- a/drivers/char/tpm/tpm_i2c_atmel.c
+++ b/drivers/char/tpm/tpm_i2c_atmel.c
@@ -153,25 +153,20 @@ static const struct tpm_class_ops i2c_atmel = {
static int i2c_atmel_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- int rc;
struct tpm_chip *chip;
struct device *dev = &client->dev;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
return -ENODEV;
- chip = tpm_register_hardware(dev, &i2c_atmel);
- if (!chip) {
- dev_err(dev, "%s() error in tpm_register_hardware\n", __func__);
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(dev, &i2c_atmel);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
chip->vendor.priv = devm_kzalloc(dev, sizeof(struct priv_data),
GFP_KERNEL);
- if (!chip->vendor.priv) {
- rc = -ENOMEM;
- goto out_err;
- }
+ if (!chip->vendor.priv)
+ return -ENOMEM;
/* Default timeouts */
chip->vendor.timeout_a = msecs_to_jiffies(TPM_I2C_SHORT_TIMEOUT);
@@ -183,32 +178,20 @@ static int i2c_atmel_probe(struct i2c_client *client,
/* There is no known way to probe for this device, and all version
* information seems to be read via TPM commands. Thus we rely on the
* TPM startup process in the common code to detect the device. */
- if (tpm_get_timeouts(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
-
- if (tpm_do_selftest(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
+ if (tpm_get_timeouts(chip))
+ return -ENODEV;
- return 0;
+ if (tpm_do_selftest(chip))
+ return -ENODEV;
-out_err:
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(chip->dev);
- return rc;
+ return tpm_chip_register(chip);
}
static int i2c_atmel_remove(struct i2c_client *client)
{
struct device *dev = &(client->dev);
struct tpm_chip *chip = dev_get_drvdata(dev);
-
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(dev);
- kfree(chip);
+ tpm_chip_unregister(chip);
return 0;
}
diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c
index 472af4b..03708e6 100644
--- a/drivers/char/tpm/tpm_i2c_infineon.c
+++ b/drivers/char/tpm/tpm_i2c_infineon.c
@@ -581,12 +581,9 @@ static int tpm_tis_i2c_init(struct device *dev)
int rc = 0;
struct tpm_chip *chip;
- chip = tpm_register_hardware(dev, &tpm_tis_i2c);
- if (!chip) {
- dev_err(dev, "could not register hardware\n");
- rc = -ENODEV;
- goto out_err;
- }
+ chip = tpmm_chip_alloc(dev, &tpm_tis_i2c);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
/* Disable interrupts */
chip->vendor.irq = 0;
@@ -600,7 +597,7 @@ static int tpm_tis_i2c_init(struct device *dev)
if (request_locality(chip, 0) != 0) {
dev_err(dev, "could not request locality\n");
rc = -ENODEV;
- goto out_vendor;
+ goto out_err;
}
/* read four bytes from DID_VID register */
@@ -628,21 +625,9 @@ static int tpm_tis_i2c_init(struct device *dev)
tpm_get_timeouts(chip);
tpm_do_selftest(chip);
- return 0;
-
+ return tpm_chip_register(chip);
out_release:
release_locality(chip, chip->vendor.locality, 1);
-
-out_vendor:
- /* close file handles */
- tpm_dev_vendor_release(chip);
-
- /* remove hardware */
- tpm_remove_hardware(chip->dev);
-
- /* reset these pointers, otherwise we oops */
- chip->dev->release = NULL;
- chip->release = NULL;
tpm_dev.client = NULL;
out_err:
return rc;
@@ -712,17 +697,9 @@ static int tpm_tis_i2c_probe(struct i2c_client *client,
static int tpm_tis_i2c_remove(struct i2c_client *client)
{
struct tpm_chip *chip = tpm_dev.chip;
- release_locality(chip, chip->vendor.locality, 1);
- /* close file handles */
- tpm_dev_vendor_release(chip);
-
- /* remove hardware */
- tpm_remove_hardware(chip->dev);
-
- /* reset these pointers, otherwise we oops */
- chip->dev->release = NULL;
- chip->release = NULL;
+ tpm_chip_unregister(chip);
+ release_locality(chip, chip->vendor.locality, 1);
tpm_dev.client = NULL;
return 0;
diff --git a/drivers/char/tpm/tpm_i2c_nuvoton.c b/drivers/char/tpm/tpm_i2c_nuvoton.c
index bbb4997..8c23088 100644
--- a/drivers/char/tpm/tpm_i2c_nuvoton.c
+++ b/drivers/char/tpm/tpm_i2c_nuvoton.c
@@ -530,18 +530,14 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
dev_info(dev, "VID: %04X DID: %02X RID: %02X\n", (u16) vid,
(u8) (vid >> 16), (u8) (vid >> 24));
- chip = tpm_register_hardware(dev, &tpm_i2c);
- if (!chip) {
- dev_err(dev, "%s() error in tpm_register_hardware\n", __func__);
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(dev, &tpm_i2c);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
chip->vendor.priv = devm_kzalloc(dev, sizeof(struct priv_data),
GFP_KERNEL);
- if (!chip->vendor.priv) {
- rc = -ENOMEM;
- goto out_err;
- }
+ if (!chip->vendor.priv)
+ return -ENOMEM;
init_waitqueue_head(&chip->vendor.read_queue);
init_waitqueue_head(&chip->vendor.int_queue);
@@ -589,7 +585,7 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
TPM_DATA_FIFO_W,
1, (u8 *) (&rc));
if (rc < 0)
- goto out_err;
+ return rc;
/* TPM_STS <- 0x40 (commandReady) */
i2c_nuvoton_ready(chip);
} else {
@@ -599,44 +595,29 @@ static int i2c_nuvoton_probe(struct i2c_client *client,
* only TPM_STS_VALID should be set
*/
if (i2c_nuvoton_read_status(chip) !=
- TPM_STS_VALID) {
- rc = -EIO;
- goto out_err;
- }
+ TPM_STS_VALID)
+ return -EIO;
}
}
}
- if (tpm_get_timeouts(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
-
- if (tpm_do_selftest(chip)) {
- rc = -ENODEV;
- goto out_err;
- }
+ if (tpm_get_timeouts(chip))
+ return -ENODEV;
- return 0;
+ if (tpm_do_selftest(chip))
+ return -ENODEV;
-out_err:
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(chip->dev);
- return rc;
+ return tpm_chip_register(chip);
}
static int i2c_nuvoton_remove(struct i2c_client *client)
{
struct device *dev = &(client->dev);
struct tpm_chip *chip = dev_get_drvdata(dev);
-
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(dev);
- kfree(chip);
+ tpm_chip_unregister(chip);
return 0;
}
-
static const struct i2c_device_id i2c_nuvoton_id[] = {
{I2C_DRIVER_NAME, 0},
{}
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index 86203b0..9a96d37 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -735,11 +735,9 @@ tpm_stm_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
if (!tpm_dev)
return -ENOMEM;
- chip = tpm_register_hardware(&client->dev, &st_i2c_tpm);
- if (!chip) {
- dev_info(&client->dev, "fail chip\n");
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(&client->dev, &st_i2c_tpm);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
TPM_VPRIV(chip) = tpm_dev;
tpm_dev->client = client;
@@ -807,10 +805,8 @@ tpm_stm_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
tpm_get_timeouts(chip);
tpm_do_selftest(chip);
- dev_info(chip->dev, "TPM I2C Initialized\n");
- return 0;
+ return tpm_chip_register(chip);
_tpm_clean_answer:
- tpm_remove_hardware(chip->dev);
dev_info(chip->dev, "TPM I2C initialisation fail\n");
return ret;
}
@@ -827,7 +823,7 @@ static int tpm_stm_i2c_remove(struct i2c_client *client)
(struct tpm_chip *) i2c_get_clientdata(client);
if (chip)
- tpm_remove_hardware(chip->dev);
+ tpm_chip_unregister(chip);
return 0;
}
diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c
index 4109222..d594610 100644
--- a/drivers/char/tpm/tpm_ibmvtpm.c
+++ b/drivers/char/tpm/tpm_ibmvtpm.c
@@ -270,8 +270,11 @@ static int ibmvtpm_crq_send_init(struct ibmvtpm_dev *ibmvtpm)
static int tpm_ibmvtpm_remove(struct vio_dev *vdev)
{
struct ibmvtpm_dev *ibmvtpm = ibmvtpm_get_data(&vdev->dev);
+ struct tpm_chip *chip = dev_get_drvdata(ibmvtpm->dev);
int rc = 0;
+ tpm_chip_unregister(chip);
+
free_irq(vdev->irq, ibmvtpm);
do {
@@ -290,8 +293,6 @@ static int tpm_ibmvtpm_remove(struct vio_dev *vdev)
kfree(ibmvtpm->rtce_buf);
}
- tpm_remove_hardware(ibmvtpm->dev);
-
kfree(ibmvtpm);
return 0;
@@ -563,11 +564,9 @@ static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
struct tpm_chip *chip;
int rc = -ENOMEM, rc1;
- chip = tpm_register_hardware(dev, &tpm_ibmvtpm);
- if (!chip) {
- dev_err(dev, "tpm_register_hardware failed\n");
- return -ENODEV;
- }
+ chip = tpmm_chip_alloc(dev, &tpm_ibmvtpm);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
ibmvtpm = kzalloc(sizeof(struct ibmvtpm_dev), GFP_KERNEL);
if (!ibmvtpm) {
@@ -637,7 +636,7 @@ static int tpm_ibmvtpm_probe(struct vio_dev *vio_dev,
if (rc)
goto init_irq_cleanup;
- return rc;
+ return tpm_chip_register(chip);
init_irq_cleanup:
do {
rc1 = plpar_hcall_norets(H_FREE_CRQ, vio_dev->unit_address);
@@ -652,8 +651,6 @@ cleanup:
kfree(ibmvtpm);
}
- tpm_remove_hardware(dev);
-
return rc;
}
diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c
index dc0a255..dcdb671 100644
--- a/drivers/char/tpm/tpm_infineon.c
+++ b/drivers/char/tpm/tpm_infineon.c
@@ -546,7 +546,14 @@ static int tpm_inf_pnp_probe(struct pnp_dev *dev,
vendorid[0], vendorid[1],
productid[0], productid[1], chipname);
- if (!(chip = tpm_register_hardware(&dev->dev, &tpm_inf)))
+ chip = tpmm_chip_alloc(&dev->dev, &tpm_inf);
+ if (IS_ERR(chip)) {
+ rc = PTR_ERR(chip);
+ goto err_release_region;
+ }
+
+ rc = tpm_chip_register(chip);
+ if (rc)
goto err_release_region;
return 0;
@@ -572,17 +579,15 @@ static void tpm_inf_pnp_remove(struct pnp_dev *dev)
{
struct tpm_chip *chip = pnp_get_drvdata(dev);
- if (chip) {
- if (tpm_dev.iotype == TPM_INF_IO_PORT) {
- release_region(tpm_dev.data_regs, tpm_dev.data_size);
- release_region(tpm_dev.config_port,
- tpm_dev.config_size);
- } else {
- iounmap(tpm_dev.mem_base);
- release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
- }
- tpm_dev_vendor_release(chip);
- tpm_remove_hardware(chip->dev);
+ tpm_chip_unregister(chip);
+
+ if (tpm_dev.iotype == TPM_INF_IO_PORT) {
+ release_region(tpm_dev.data_regs, tpm_dev.data_size);
+ release_region(tpm_dev.config_port,
+ tpm_dev.config_size);
+ } else {
+ iounmap(tpm_dev.mem_base);
+ release_mem_region(tpm_dev.map_base, tpm_dev.map_size);
}
}
diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c
index 3179ec9..00c5470 100644
--- a/drivers/char/tpm/tpm_nsc.c
+++ b/drivers/char/tpm/tpm_nsc.c
@@ -247,10 +247,9 @@ static struct platform_device *pdev = NULL;
static void tpm_nsc_remove(struct device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(dev);
- if ( chip ) {
- release_region(chip->vendor.base, 2);
- tpm_remove_hardware(chip->dev);
- }
+
+ tpm_chip_unregister(chip);
+ release_region(chip->vendor.base, 2);
}
static SIMPLE_DEV_PM_OPS(tpm_nsc_pm, tpm_pm_suspend, tpm_pm_resume);
@@ -308,11 +307,16 @@ static int __init init_nsc(void)
goto err_del_dev;
}
- if (!(chip = tpm_register_hardware(&pdev->dev, &tpm_nsc))) {
+ chip = tpmm_chip_alloc(&pdev->dev, &tpm_nsc);
+ if (IS_ERR(chip)) {
rc = -ENODEV;
goto err_rel_reg;
}
+ rc = tpm_chip_register(chip);
+ if (rc)
+ goto err_rel_reg;
+
dev_dbg(&pdev->dev, "NSC TPM detected\n");
dev_dbg(&pdev->dev,
"NSC LDN 0x%x, SID 0x%x, SRID 0x%x\n",
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 51350cd..4cf2ea2 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -79,9 +79,6 @@ struct priv_data {
bool irq_tested;
};
-static LIST_HEAD(tis_chips);
-static DEFINE_MUTEX(tis_lock);
-
#if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
static int is_itpm(struct pnp_dev *dev)
{
@@ -572,6 +569,17 @@ static bool interrupts = true;
module_param(interrupts, bool, 0444);
MODULE_PARM_DESC(interrupts, "Enable interrupts");
+static void tpm_tis_remove(struct tpm_chip *chip)
+{
+ iowrite32(~TPM_GLOBAL_INT_ENABLE &
+ ioread32(chip->vendor.iobase +
+ TPM_INT_ENABLE(chip->vendor.
+ locality)),
+ chip->vendor.iobase +
+ TPM_INT_ENABLE(chip->vendor.locality));
+ release_locality(chip, chip->vendor.locality, 1);
+}
+
static int tpm_tis_init(struct device *dev, resource_size_t start,
resource_size_t len, unsigned int irq)
{
@@ -583,15 +591,16 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
priv = devm_kzalloc(dev, sizeof(struct priv_data), GFP_KERNEL);
if (priv == NULL)
return -ENOMEM;
- if (!(chip = tpm_register_hardware(dev, &tpm_tis)))
- return -ENODEV;
+
+ chip = tpmm_chip_alloc(dev, &tpm_tis);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
+
chip->vendor.priv = priv;
- chip->vendor.iobase = ioremap(start, len);
- if (!chip->vendor.iobase) {
- rc = -EIO;
- goto out_err;
- }
+ chip->vendor.iobase = devm_ioremap(dev, start, len);
+ if (!chip->vendor.iobase)
+ return -EIO;
/* Default timeouts */
chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
@@ -685,8 +694,8 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
for (i = irq_s; i <= irq_e && chip->vendor.irq == 0; i++) {
iowrite8(i, chip->vendor.iobase +
TPM_INT_VECTOR(chip->vendor.locality));
- if (request_irq
- (i, tis_int_probe, IRQF_SHARED,
+ if (devm_request_irq
+ (dev, i, tis_int_probe, IRQF_SHARED,
chip->vendor.miscdev.name, chip) != 0) {
dev_info(chip->dev,
"Unable to request irq: %d for probe\n",
@@ -726,15 +735,14 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
iowrite32(intmask,
chip->vendor.iobase +
TPM_INT_ENABLE(chip->vendor.locality));
- free_irq(i, chip);
}
}
if (chip->vendor.irq) {
iowrite8(chip->vendor.irq,
chip->vendor.iobase +
TPM_INT_VECTOR(chip->vendor.locality));
- if (request_irq
- (chip->vendor.irq, tis_int_handler, IRQF_SHARED,
+ if (devm_request_irq
+ (dev, chip->vendor.irq, tis_int_handler, IRQF_SHARED,
chip->vendor.miscdev.name, chip) != 0) {
dev_info(chip->dev,
"Unable to request irq: %d for use\n",
@@ -767,17 +775,9 @@ static int tpm_tis_init(struct device *dev, resource_size_t start,
goto out_err;
}
- INIT_LIST_HEAD(&chip->vendor.list);
- mutex_lock(&tis_lock);
- list_add(&chip->vendor.list, &tis_chips);
- mutex_unlock(&tis_lock);
-
-
- return 0;
+ return tpm_chip_register(chip);
out_err:
- if (chip->vendor.iobase)
- iounmap(chip->vendor.iobase);
- tpm_remove_hardware(chip->dev);
+ tpm_tis_remove(chip);
return rc;
}
@@ -859,13 +859,10 @@ MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);
static void tpm_tis_pnp_remove(struct pnp_dev *dev)
{
struct tpm_chip *chip = pnp_get_drvdata(dev);
-
- tpm_dev_vendor_release(chip);
-
- kfree(chip);
+ tpm_chip_unregister(chip);
+ tpm_tis_remove(chip);
}
-
static struct pnp_driver tis_pnp_driver = {
.name = "tpm_tis",
.id_table = tpm_pnp_tbl,
@@ -884,7 +881,7 @@ MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
static struct platform_driver tis_drv = {
.driver = {
- .name = "tpm_tis",
+ .name = "tpm_tis",
.owner = THIS_MODULE,
.pm = &tpm_tis_pm,
},
@@ -924,31 +921,16 @@ err_dev:
static void __exit cleanup_tis(void)
{
- struct tpm_vendor_specific *i, *j;
struct tpm_chip *chip;
- mutex_lock(&tis_lock);
- list_for_each_entry_safe(i, j, &tis_chips, list) {
- chip = to_tpm_chip(i);
- tpm_remove_hardware(chip->dev);
- iowrite32(~TPM_GLOBAL_INT_ENABLE &
- ioread32(chip->vendor.iobase +
- TPM_INT_ENABLE(chip->vendor.
- locality)),
- chip->vendor.iobase +
- TPM_INT_ENABLE(chip->vendor.locality));
- release_locality(chip, chip->vendor.locality, 1);
- if (chip->vendor.irq)
- free_irq(chip->vendor.irq, chip);
- iounmap(i->iobase);
- list_del(&i->list);
- }
- mutex_unlock(&tis_lock);
#ifdef CONFIG_PNP
if (!force) {
pnp_unregister_driver(&tis_pnp_driver);
return;
}
#endif
+ chip = dev_get_drvdata(&pdev->dev);
+ tpm_chip_unregister(chip);
+ tpm_tis_remove(chip);
platform_device_unregister(pdev);
platform_driver_unregister(&tis_drv);
}
diff --git a/drivers/char/tpm/xen-tpmfront.c b/drivers/char/tpm/xen-tpmfront.c
index 2064b45..ce01db3 100644
--- a/drivers/char/tpm/xen-tpmfront.c
+++ b/drivers/char/tpm/xen-tpmfront.c
@@ -175,9 +175,9 @@ static int setup_chip(struct device *dev, struct tpm_private *priv)
{
struct tpm_chip *chip;
- chip = tpm_register_hardware(dev, &tpm_vtpm);
- if (!chip)
- return -ENODEV;
+ chip = tpmm_chip_alloc(dev, &tpm_vtpm);
+ if (IS_ERR(chip))
+ return PTR_ERR(chip);
init_waitqueue_head(&chip->vendor.read_queue);
@@ -286,6 +286,7 @@ static int tpmfront_probe(struct xenbus_device *dev,
const struct xenbus_device_id *id)
{
struct tpm_private *priv;
+ struct tpm_chip *chip;
int rv;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
@@ -302,21 +303,22 @@ static int tpmfront_probe(struct xenbus_device *dev,
rv = setup_ring(dev, priv);
if (rv) {
- tpm_remove_hardware(&dev->dev);
+ chip = dev_get_drvdata(&dev->dev);
+ tpm_chip_unregister(chip);
ring_free(priv);
return rv;
}
tpm_get_timeouts(priv->chip);
- return rv;
+ return tpm_chip_register(priv->chip);
}
static int tpmfront_remove(struct xenbus_device *dev)
{
struct tpm_chip *chip = dev_get_drvdata(&dev->dev);
struct tpm_private *priv = TPM_VPRIV(chip);
- tpm_remove_hardware(&dev->dev);
+ tpm_chip_unregister(chip);
ring_free(priv);
TPM_VPRIV(chip) = NULL;
return 0;
--
2.1.0
^ permalink raw reply related
* [PATCH v9 1/8] tpm: merge duplicate transmit_cmd() functions
From: Jarkko Sakkinen @ 2014-12-04 5:55 UTC (permalink / raw)
To: Peter Huewe, Ashley Lai, Marcel Selhorst
Cc: tpmdd-devel, linux-kernel, josh.triplett, christophe.ricard,
jason.gunthorpe, linux-api, trousers-tech, Jarkko Sakkinen
In-Reply-To: <1417672518-4530-1-git-send-email-jarkko.sakkinen@linux.intel.com>
Merged transmit_cmd() functions in tpm-interface.c and tpm-sysfs.c.
Added "tpm_" prefix for consistency sake. Changed cmd parameter as
opaque. This enables to use separate command structures for TPM1
and TPM2 commands in future. Loose coupling works fine here.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
---
drivers/char/tpm/tpm-interface.c | 49 +++++++++++++++++++++-------------------
drivers/char/tpm/tpm-sysfs.c | 23 ++-----------------
drivers/char/tpm/tpm.h | 3 ++-
3 files changed, 30 insertions(+), 45 deletions(-)
diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index cfb9089..c17aa45 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -398,9 +398,10 @@ out:
#define TPM_DIGEST_SIZE 20
#define TPM_RET_CODE_IDX 6
-static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd,
- int len, const char *desc)
+ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd,
+ int len, const char *desc)
{
+ struct tpm_output_header *header;
int err;
len = tpm_transmit(chip, (u8 *) cmd, len);
@@ -409,7 +410,9 @@ static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd,
else if (len < TPM_HEADER_SIZE)
return -EFAULT;
- err = be32_to_cpu(cmd->header.out.return_code);
+ header = cmd;
+
+ err = be32_to_cpu(header->return_code);
if (err != 0 && desc)
dev_err(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
@@ -448,7 +451,7 @@ ssize_t tpm_getcap(struct device *dev, __be32 subcap_id, cap_t *cap,
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = subcap_id;
}
- rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, desc);
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, desc);
if (!rc)
*cap = tpm_cmd.params.getcap_out.cap;
return rc;
@@ -464,8 +467,8 @@ void tpm_gen_interrupt(struct tpm_chip *chip)
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
- rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
- "attempting to determine the timeouts");
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
+ "attempting to determine the timeouts");
}
EXPORT_SYMBOL_GPL(tpm_gen_interrupt);
@@ -484,8 +487,8 @@ static int tpm_startup(struct tpm_chip *chip, __be16 startup_type)
struct tpm_cmd_t start_cmd;
start_cmd.header.in = tpm_startup_header;
start_cmd.params.startup_in.startup_type = startup_type;
- return transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE,
- "attempting to start the TPM");
+ return tpm_transmit_cmd(chip, &start_cmd, TPM_INTERNAL_RESULT_SIZE,
+ "attempting to start the TPM");
}
int tpm_get_timeouts(struct tpm_chip *chip)
@@ -500,7 +503,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
- rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL);
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE, NULL);
if (rc == TPM_ERR_INVALID_POSTINIT) {
/* The TPM is not started, we are the first to talk to it.
@@ -513,7 +516,7 @@ int tpm_get_timeouts(struct tpm_chip *chip)
tpm_cmd.params.getcap_in.cap = TPM_CAP_PROP;
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_TIMEOUT;
- rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
NULL);
}
if (rc) {
@@ -575,8 +578,8 @@ duration:
tpm_cmd.params.getcap_in.subcap_size = cpu_to_be32(4);
tpm_cmd.params.getcap_in.subcap = TPM_CAP_PROP_TIS_DURATION;
- rc = transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
- "attempting to determine the durations");
+ rc = tpm_transmit_cmd(chip, &tpm_cmd, TPM_INTERNAL_RESULT_SIZE,
+ "attempting to determine the durations");
if (rc)
return rc;
@@ -631,8 +634,8 @@ static int tpm_continue_selftest(struct tpm_chip *chip)
struct tpm_cmd_t cmd;
cmd.header.in = continue_selftest_header;
- rc = transmit_cmd(chip, &cmd, CONTINUE_SELFTEST_RESULT_SIZE,
- "continue selftest");
+ rc = tpm_transmit_cmd(chip, &cmd, CONTINUE_SELFTEST_RESULT_SIZE,
+ "continue selftest");
return rc;
}
@@ -672,8 +675,8 @@ int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf)
cmd.header.in = pcrread_header;
cmd.params.pcrread_in.pcr_idx = cpu_to_be32(pcr_idx);
- rc = transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE,
- "attempting to read a pcr value");
+ rc = tpm_transmit_cmd(chip, &cmd, READ_PCR_RESULT_SIZE,
+ "attempting to read a pcr value");
if (rc == 0)
memcpy(res_buf, cmd.params.pcrread_out.pcr_result,
@@ -737,8 +740,8 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
cmd.header.in = pcrextend_header;
cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(pcr_idx);
memcpy(cmd.params.pcrextend_in.hash, hash, TPM_DIGEST_SIZE);
- rc = transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
- "attempting extend a PCR value");
+ rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
+ "attempting extend a PCR value");
tpm_chip_put(chip);
return rc;
@@ -817,7 +820,7 @@ int tpm_send(u32 chip_num, void *cmd, size_t buflen)
if (chip == NULL)
return -ENODEV;
- rc = transmit_cmd(chip, cmd, buflen, "attempting tpm_cmd");
+ rc = tpm_transmit_cmd(chip, cmd, buflen, "attempting tpm_cmd");
tpm_chip_put(chip);
return rc;
@@ -938,14 +941,14 @@ int tpm_pm_suspend(struct device *dev)
cmd.params.pcrextend_in.pcr_idx = cpu_to_be32(tpm_suspend_pcr);
memcpy(cmd.params.pcrextend_in.hash, dummy_hash,
TPM_DIGEST_SIZE);
- rc = transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
- "extending dummy pcr before suspend");
+ rc = tpm_transmit_cmd(chip, &cmd, EXTEND_PCR_RESULT_SIZE,
+ "extending dummy pcr before suspend");
}
/* now do the actual savestate */
for (try = 0; try < TPM_RETRY; try++) {
cmd.header.in = savestate_header;
- rc = transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, NULL);
+ rc = tpm_transmit_cmd(chip, &cmd, SAVESTATE_RESULT_SIZE, NULL);
/*
* If the TPM indicates that it is too busy to respond to
@@ -1022,7 +1025,7 @@ int tpm_get_random(u32 chip_num, u8 *out, size_t max)
tpm_cmd.header.in = tpm_getrandom_header;
tpm_cmd.params.getrandom_in.num_bytes = cpu_to_be32(num_bytes);
- err = transmit_cmd(chip, &tpm_cmd,
+ err = tpm_transmit_cmd(chip, &tpm_cmd,
TPM_GETRANDOM_RESULT_SIZE + num_bytes,
"attempting get random");
if (err)
diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
index 01730a2..8ecb052 100644
--- a/drivers/char/tpm/tpm-sysfs.c
+++ b/drivers/char/tpm/tpm-sysfs.c
@@ -20,25 +20,6 @@
#include <linux/device.h>
#include "tpm.h"
-/* XXX for now this helper is duplicated in tpm-interface.c */
-static ssize_t transmit_cmd(struct tpm_chip *chip, struct tpm_cmd_t *cmd,
- int len, const char *desc)
-{
- int err;
-
- len = tpm_transmit(chip, (u8 *) cmd, len);
- if (len < 0)
- return len;
- else if (len < TPM_HEADER_SIZE)
- return -EFAULT;
-
- err = be32_to_cpu(cmd->header.out.return_code);
- if (err != 0 && desc)
- dev_err(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
-
- return err;
-}
-
#define READ_PUBEK_RESULT_SIZE 314
#define TPM_ORD_READPUBEK cpu_to_be32(124)
static struct tpm_input_header tpm_readpubek_header = {
@@ -58,8 +39,8 @@ static ssize_t pubek_show(struct device *dev, struct device_attribute *attr,
struct tpm_chip *chip = dev_get_drvdata(dev);
tpm_cmd.header.in = tpm_readpubek_header;
- err = transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE,
- "attempting to read the PUBEK");
+ err = tpm_transmit_cmd(chip, &tpm_cmd, READ_PUBEK_RESULT_SIZE,
+ "attempting to read the PUBEK");
if (err)
goto out;
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index e4d0888..e638eb0 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -314,9 +314,10 @@ struct tpm_cmd_t {
} __packed;
ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
-
ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
size_t bufsiz);
+ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd, int len,
+ const char *desc);
extern int tpm_get_timeouts(struct tpm_chip *);
extern void tpm_gen_interrupt(struct tpm_chip *);
extern int tpm_do_selftest(struct tpm_chip *);
--
2.1.0
^ permalink raw reply related
* [PATCH v9 0/8] TPM 2.0 support
From: Jarkko Sakkinen @ 2014-12-04 5:55 UTC (permalink / raw)
To: Peter Huewe, Ashley Lai, Marcel Selhorst
Cc: tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
josh.triplett-ral2JQCrhuEAvxtiuMwx3w,
christophe.ricard-Re5JQEeQqe8AvxtiuMwx3w,
jason.gunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/,
linux-api-u79uwXL29TY76Z2rM5mHXA,
trousers-tech-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f, Jarkko Sakkinen
This patch set enables TPM2 protocol and provides drivers for FIFO and
CRB interfaces. This patch set does not export any sysfs attributes for
TPM 2.0 because existing sysfs attributes have three non-trivial issues:
- They are associated with the platform device instead of character
device.
- They are are not trivial key-value pairs but contain text that is
not easily parsed by a computer.
- Raciness as described in
http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/
This is too big effort to be included into this patch set and requires
more discussion.
v2:
- Improved struct tpm_chip life-cycle by taking advantage of devres
API.
- Refined sysfs attributes as simple key-values thereby not repeating
mistakes in TPM1 sysfs attributes.
- Documented functions in tpm-chip.c and tpm2-cmd.c.
- Documented sysfs attributes.
v3:
- Lots of fixes in calling order in device drivers (thanks to Jason
Gunthorpe for pointing these out!).
- Attach sysfs attributes to the misc device because it represents
TPM device to the user space.
v4:
- Disable sysfs attibutes for TPM 2.0 for until we can sort out the
best approach for them.
- Fixed all the style issues found with checkpatch.pl.
v5:
- missing EXPORT_SYMBOL_GPL()
- own class for TPM devices used for TPM 2.0 devices and onwards.
v6:
- Non-racy initialization for sysfs attributes using struct device's
groups field.
- The class 'tpm' is used now for all TPM devices. For the first device
node major MISC_MAJOR and minor TPM_MINOR is used in order to retain
backwards compatability.
v7:
- Release device number and free struct tpm_chip memory inside
tpm_dev_release callback.
- Moved code from tpm-interface.c and tpm_dev.c to tpm-chip.c.
v8:
- Cleaned up unneeded cast from tpm_transmit_cmd().
- Cleaned up redundant PPI_VERSION_LEN constant from tpm_ppi.c.
- Fixed tpm_tis to use tpm2_calc_ordinal_duration() for TPM2 devices.
- tpm_crb: in crb_recv, check that count can hold the TPM header at
minimum.
- tpm_crb: add enumerations for bit flags in start and cancel fields
of the control area.
- tpm_crb: use ioremap() for command and response buffer because
they might be anywhere.
- tpm_crb: use IO access functions for reading ioremapped buffers
because using direct pointers is not portable.
- tpm_crb: only apply ACPI start if start method reported by the
TPM2 ACPI table allows it.
- In tpm2_pcr_read() just calculate index and bit and get rid of
hacky loop.
- Do not add sysfs attributes for TPM 2.0 devices.
v9:
- Fixed compilation issues in v8 (sorry for not using the correct
tree).
- Just do "return tpm_chip_register();" instead of copying return
value to a variable.
- Removed unused tpm2_startup().
- In the CRB driver ACPI TPM2 table could contain platform specific
and therefore inequality test does not work. Fixed in this patch
set.
Jarkko Sakkinen (7):
tpm: merge duplicate transmit_cmd() functions
tpm: two-phase chip management functions
tpm: fix raciness of PPI interface lookup
tpm: rename chip->dev to chip->pdev
tpm: device class for tpm
tpm: TPM 2.0 baseline support
tpm: TPM 2.0 CRB Interface
Will Arthur (1):
tpm: TPM 2.0 FIFO Interface
drivers/char/tpm/Kconfig | 9 +
drivers/char/tpm/Makefile | 3 +-
drivers/char/tpm/tpm-chip.c | 251 +++++++++++++++++
drivers/char/tpm/tpm-dev.c | 42 +--
drivers/char/tpm/tpm-interface.c | 261 ++++++-----------
drivers/char/tpm/tpm-sysfs.c | 29 +-
drivers/char/tpm/tpm.h | 107 +++++--
drivers/char/tpm/tpm2-cmd.c | 542 ++++++++++++++++++++++++++++++++++++
drivers/char/tpm/tpm_atmel.c | 25 +-
drivers/char/tpm/tpm_crb.c | 356 +++++++++++++++++++++++
drivers/char/tpm/tpm_i2c_atmel.c | 55 ++--
drivers/char/tpm/tpm_i2c_infineon.c | 43 +--
drivers/char/tpm/tpm_i2c_nuvoton.c | 71 ++---
drivers/char/tpm/tpm_i2c_stm_st33.c | 28 +-
drivers/char/tpm/tpm_ibmvtpm.c | 17 +-
drivers/char/tpm/tpm_infineon.c | 51 ++--
drivers/char/tpm/tpm_nsc.c | 34 ++-
drivers/char/tpm/tpm_ppi.c | 137 +++++----
drivers/char/tpm/tpm_tis.c | 192 ++++++++-----
drivers/char/tpm/xen-tpmfront.c | 14 +-
20 files changed, 1689 insertions(+), 578 deletions(-)
create mode 100644 drivers/char/tpm/tpm-chip.c
create mode 100644 drivers/char/tpm/tpm2-cmd.c
create mode 100644 drivers/char/tpm/tpm_crb.c
--
2.1.0
^ permalink raw reply
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