[PATCH v3 08/19] nvme: Move pr code to it's own file

Mike Christie
2022-10-26T23:21:08Z

This patch moves the pr code to it's own file because I'm going to be
adding more functions and core.c is getting bigger.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
drivers/nvme/host/Makefile | 2 +-
drivers/nvme/host/core.c | 120 -----------------------------------
drivers/nvme/host/nvme.h | 2 +
drivers/nvme/host/pr.c | 127 +++++++++++++++++++++++++++++++++++++
4 files changed, 130 insertions(+), 121 deletions(-)
create mode 100644 drivers/nvme/host/pr.c

diff --git a/drivers/nvme/host/Makefile b/drivers/nvme/host/Makefile
index e27202d22c7d..06c18a65da99 100644
--- a/drivers/nvme/host/Makefile
+++ b/drivers/nvme/host/Makefile
@@ -10,7 +10,7 @@ obj-$(CONFIG_NVME_FC) += nvme-fc.o
obj-$(CONFIG_NVME_TCP) += nvme-tcp.o
obj-$(CONFIG_NVME_APPLE) += nvme-apple.o

-nvme-core-y += core.o ioctl.o
+nvme-core-y += core.o ioctl.o pr.o
nvme-core-$(CONFIG_NVME_VERBOSE_ERRORS) += constants.o
nvme-core-$(CONFIG_TRACING) += trace.o
nvme-core-$(CONFIG_NVME_MULTIPATH) += multipath.o
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index a79fa710d012..2de9c42094a6 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2061,126 +2061,6 @@ static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_ns_info *info)
}
}

-static char nvme_pr_type(enum pr_type type)
-{
- switch (type) {
- case PR_WRITE_EXCLUSIVE:
- return 1;
- case PR_EXCLUSIVE_ACCESS:
- return 2;
- case PR_WRITE_EXCLUSIVE_REG_ONLY:
- return 3;
- case PR_EXCLUSIVE_ACCESS_REG_ONLY:
- return 4;
- case PR_WRITE_EXCLUSIVE_ALL_REGS:
- return 5;
- case PR_EXCLUSIVE_ACCESS_ALL_REGS:
- return 6;
- default:
- return 0;
- }
-}
-
-static int nvme_send_ns_head_pr_command(struct block_device *bdev,
- struct nvme_command *c, u8 *data, unsigned int data_len)
-{
- struct nvme_ns_head *head = bdev->bd_disk->private_data;
- int srcu_idx = srcu_read_lock(&head->srcu);
- struct nvme_ns *ns = nvme_find_path(head);
- int ret = -EWOULDBLOCK;
-
- if (ns) {
- c->common.nsid = cpu_to_le32(ns->head->ns_id);
- ret = nvme_submit_sync_cmd(ns->queue, c, data, data_len);
- }
- srcu_read_unlock(&head->srcu, srcu_idx);
- return ret;
-}
-
-static int nvme_send_ns_pr_command(struct nvme_ns *ns, struct nvme_command *c,
- u8 *data, unsigned int data_len)
-{
- c->common.nsid = cpu_to_le32(ns->head->ns_id);
- return nvme_submit_sync_cmd(ns->queue, c, data, data_len);
-}
-
-static int nvme_pr_command(struct block_device *bdev, u32 cdw10,
- u64 key, u64 sa_key, u8 op)
-{
- struct nvme_command c = { };
- u8 data[16] = { 0, };
-
- put_unaligned_le64(key, &data[0]);
- put_unaligned_le64(sa_key, &data[8]);
-
- c.common.opcode = op;
- c.common.cdw10 = cpu_to_le32(cdw10);
-
- if (IS_ENABLED(CONFIG_NVME_MULTIPATH) &&
- bdev->bd_disk->fops == &nvme_ns_head_ops)
- return nvme_send_ns_head_pr_command(bdev, &c, data,
- sizeof(data));
- return nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, data,
- sizeof(data));
-}
-
-static int nvme_pr_register(struct block_device *bdev, u64 old,
- u64 new, unsigned flags)
-{
- u32 cdw10;
-
- if (flags & ~PR_FL_IGNORE_KEY)
- return -EOPNOTSUPP;
-
- cdw10 = old ? 2 : 0;
- cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0;
- cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */
- return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register);
-}
-
-static int nvme_pr_reserve(struct block_device *bdev, u64 key,
- enum pr_type type, unsigned flags)
-{
- u32 cdw10;
-
- if (flags & ~PR_FL_IGNORE_KEY)
- return -EOPNOTSUPP;
-
- cdw10 = nvme_pr_type(type) << 8;
- cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0);
- return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire);
-}
-
-static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new,
- enum pr_type type, bool abort)
-{
- u32 cdw10 = nvme_pr_type(type) << 8 | (abort ? 2 : 1);
-
- return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire);
-}
-
-static int nvme_pr_clear(struct block_device *bdev, u64 key)
-{
- u32 cdw10 = 1 | (key ? 0 : 1 << 3);
-
- return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release);
-}
-
-static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
-{
- u32 cdw10 = nvme_pr_type(type) << 8 | (key ? 0 : 1 << 3);
-
- return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release);
-}
-
-const struct pr_ops nvme_pr_ops = {
- .pr_register = nvme_pr_register,
- .pr_reserve = nvme_pr_reserve,
- .pr_release = nvme_pr_release,
- .pr_preempt = nvme_pr_preempt,
- .pr_clear = nvme_pr_clear,
-};
-
#ifdef CONFIG_BLK_SED_OPAL
int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len,
bool send)
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index a29877217ee6..e82be1f1373d 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -19,6 +19,8 @@

#include <trace/events/block.h>

+extern const struct pr_ops nvme_pr_ops;
+
extern unsigned int nvme_io_timeout;
#define NVME_IO_TIMEOUT (nvme_io_timeout * HZ)

diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c
new file mode 100644
index 000000000000..aa88c55879b2
--- /dev/null
+++ b/drivers/nvme/host/pr.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/blkdev.h>
+#include <linux/pr.h>
+#include <asm/unaligned.h>
+
+#include "nvme.h"
+
+static char nvme_pr_type(enum pr_type type)
+{
+ switch (type) {
+ case PR_WRITE_EXCLUSIVE:
+ return 1;
+ case PR_EXCLUSIVE_ACCESS:
+ return 2;
+ case PR_WRITE_EXCLUSIVE_REG_ONLY:
+ return 3;
+ case PR_EXCLUSIVE_ACCESS_REG_ONLY:
+ return 4;
+ case PR_WRITE_EXCLUSIVE_ALL_REGS:
+ return 5;
+ case PR_EXCLUSIVE_ACCESS_ALL_REGS:
+ return 6;
+ default:
+ return 0;
+ }
+}
+
+static int nvme_send_ns_head_pr_command(struct block_device *bdev,
+ struct nvme_command *c, u8 *data, unsigned int data_len)
+{
+ struct nvme_ns_head *head = bdev->bd_disk->private_data;
+ int srcu_idx = srcu_read_lock(&head->srcu);
+ struct nvme_ns *ns = nvme_find_path(head);
+ int ret = -EWOULDBLOCK;
+
+ if (ns) {
+ c->common.nsid = cpu_to_le32(ns->head->ns_id);
+ ret = nvme_submit_sync_cmd(ns->queue, c, data, data_len);
+ }
+ srcu_read_unlock(&head->srcu, srcu_idx);
+ return ret;
+}
+
+static int nvme_send_ns_pr_command(struct nvme_ns *ns, struct nvme_command *c,
+ u8 *data, unsigned int data_len)
+{
+ c->common.nsid = cpu_to_le32(ns->head->ns_id);
+ return nvme_submit_sync_cmd(ns->queue, c, data, data_len);
+}
+
+static int nvme_pr_command(struct block_device *bdev, u32 cdw10,
+ u64 key, u64 sa_key, u8 op)
+{
+ struct nvme_command c = { };
+ u8 data[16] = { 0, };
+
+ put_unaligned_le64(key, &data[0]);
+ put_unaligned_le64(sa_key, &data[8]);
+
+ c.common.opcode = op;
+ c.common.cdw10 = cpu_to_le32(cdw10);
+
+ if (IS_ENABLED(CONFIG_NVME_MULTIPATH) &&
+ bdev->bd_disk->fops == &nvme_ns_head_ops)
+ return nvme_send_ns_head_pr_command(bdev, &c, data,
+ sizeof(data));
+ return nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, data,
+ sizeof(data));
+}
+
+static int nvme_pr_register(struct block_device *bdev, u64 old,
+ u64 new, unsigned flags)
+{
+ u32 cdw10;
+
+ if (flags & ~PR_FL_IGNORE_KEY)
+ return -EOPNOTSUPP;
+
+ cdw10 = old ? 2 : 0;
+ cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0;
+ cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */
+ return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register);
+}
+
+static int nvme_pr_reserve(struct block_device *bdev, u64 key,
+ enum pr_type type, unsigned flags)
+{
+ u32 cdw10;
+
+ if (flags & ~PR_FL_IGNORE_KEY)
+ return -EOPNOTSUPP;
+
+ cdw10 = nvme_pr_type(type) << 8;
+ cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0);
+ return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire);
+}
+
+static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new,
+ enum pr_type type, bool abort)
+{
+ u32 cdw10 = nvme_pr_type(type) << 8 | (abort ? 2 : 1);
+
+ return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire);
+}
+
+static int nvme_pr_clear(struct block_device *bdev, u64 key)
+{
+ u32 cdw10 = 1 | (key ? 0 : 1 << 3);
+
+ return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release);
+}
+
+static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type)
+{
+ u32 cdw10 = nvme_pr_type(type) << 8 | (key ? 0 : 1 << 3);
+
+ return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release);
+}
+
+const struct pr_ops nvme_pr_ops = {
+ .pr_register = nvme_pr_register,
+ .pr_reserve = nvme_pr_reserve,
+ .pr_release = nvme_pr_release,
+ .pr_preempt = nvme_pr_preempt,
+ .pr_clear = nvme_pr_clear,
+};
--
2.25.1