* [PATCH v6 2/4] PCI: Move isa_dma_bridge_buggy out of dma.h
[not found] <20220722214944.831438-1-shorne@gmail.com>
@ 2022-07-22 21:49 ` Stafford Horne
0 siblings, 0 replies; only message in thread
From: Stafford Horne @ 2022-07-22 21:49 UTC (permalink / raw)
To: LKML
Cc: Arnd Bergmann, Stafford Horne, Christoph Hellwig,
Geert Uytterhoeven, Christoph Hellwig, Richard Henderson,
Ivan Kokshaysky, Matt Turner, Vineet Gupta, Russell King,
Catalin Marinas, Will Deacon, Guo Ren, Michal Simek,
Thomas Bogendoerfer, James E.J. Bottomley, Helge Deller,
Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras,
Paul Walmsley, Palmer Dabbelt, Albert Ou, Heiko Carstens,
Vasily Gorbik, Alexander Gordeev, Christian Borntraeger,
Sven Schnelle, Yoshinori Sato, Rich Felker, David S. Miller,
Richard Weinberger, Anton Ivanov, Johannes Berg, Thomas Gleixner,
Ingo Molnar, Borislav Petkov, Dave Hansen, x86, H. Peter Anvin,
Chris Zankel, Max Filippov, Ian Abbott, H Hartley Sweeten,
Bjorn Helgaas, Jaroslav Kysela, Takashi Iwai, Pierre Morel,
Rafael J. Wysocki, Greg Ungerer, Greg Kroah-Hartman, linux-alpha,
linux-snps-arc, linux-arm-kernel, linux-csky, linux-ia64,
linux-m68k, linux-mips, linux-parisc, linuxppc-dev, linux-riscv,
linux-s390, linux-sh, sparclinux, linux-um, linux-pci, alsa-devel
During recent PCI cleanups we noticed that the isa_dma_bridge_buggy
symbol supported by all architectures is actually only used for x86_32.
This patch moves the symbol out of all architectures limiting usage to
only x86_32. This is possible because only x86_32 platforms or quirks
existing in PCI devices supported on x86_32 ever set this. A new global
header linux/isa-dma.h is added to provide a common place to maintain
the definition.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Stafford Horne <shorne@gmail.com>
---
arch/alpha/include/asm/dma.h | 9 ---------
arch/arc/include/asm/dma.h | 5 -----
arch/arm/include/asm/dma.h | 6 ------
arch/arm64/include/asm/pci.h | 2 --
arch/csky/include/asm/pci.h | 2 --
arch/ia64/include/asm/dma.h | 2 --
arch/m68k/include/asm/dma.h | 6 ------
arch/microblaze/include/asm/dma.h | 6 ------
arch/mips/include/asm/dma.h | 8 --------
arch/parisc/include/asm/dma.h | 6 ------
arch/powerpc/include/asm/dma.h | 6 ------
arch/riscv/include/asm/pci.h | 2 --
arch/s390/include/asm/dma.h | 6 ------
arch/sh/include/asm/dma.h | 6 ------
arch/sparc/include/asm/dma.h | 8 --------
arch/um/include/asm/pci.h | 2 --
arch/x86/include/asm/dma.h | 8 --------
arch/xtensa/include/asm/dma.h | 7 -------
drivers/comedi/drivers/comedi_isadma.c | 2 +-
drivers/pci/pci.c | 2 ++
drivers/pci/quirks.c | 4 +++-
include/linux/isa-dma.h | 14 ++++++++++++++
sound/core/isadma.c | 2 +-
23 files changed, 21 insertions(+), 100 deletions(-)
create mode 100644 include/linux/isa-dma.h
diff --git a/arch/alpha/include/asm/dma.h b/arch/alpha/include/asm/dma.h
index 28610ea7786d..a04d76b96089 100644
--- a/arch/alpha/include/asm/dma.h
+++ b/arch/alpha/include/asm/dma.h
@@ -365,13 +365,4 @@ extern void free_dma(unsigned int dmanr); /* release it again */
#define KERNEL_HAVE_CHECK_DMA
extern int check_dma(unsigned int dmanr);
-/* From PCI */
-
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
-
#endif /* _ASM_DMA_H */
diff --git a/arch/arc/include/asm/dma.h b/arch/arc/include/asm/dma.h
index 5b744f4b10a7..02431027ed2f 100644
--- a/arch/arc/include/asm/dma.h
+++ b/arch/arc/include/asm/dma.h
@@ -7,10 +7,5 @@
#define ASM_ARC_DMA_H
#define MAX_DMA_ADDRESS 0xC0000000
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy 0
-#endif
#endif
diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h
index a81dda65c576..907d139be431 100644
--- a/arch/arm/include/asm/dma.h
+++ b/arch/arm/include/asm/dma.h
@@ -143,10 +143,4 @@ extern int get_dma_residue(unsigned int chan);
#endif /* CONFIG_ISA_DMA_API */
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
#endif /* __ASM_ARM_DMA_H */
diff --git a/arch/arm64/include/asm/pci.h b/arch/arm64/include/asm/pci.h
index 0aebc3488c32..682c922b5658 100644
--- a/arch/arm64/include/asm/pci.h
+++ b/arch/arm64/include/asm/pci.h
@@ -20,8 +20,6 @@
#define arch_can_pci_mmap_wc() 1
#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1
-extern int isa_dma_bridge_buggy;
-
#ifdef CONFIG_PCI
static inline int pci_proc_domain(struct pci_bus *bus)
{
diff --git a/arch/csky/include/asm/pci.h b/arch/csky/include/asm/pci.h
index 0535f1aaae38..5c02454ec724 100644
--- a/arch/csky/include/asm/pci.h
+++ b/arch/csky/include/asm/pci.h
@@ -15,8 +15,6 @@
/* C-SKY shim does not initialize PCI bus */
#define pcibios_assign_all_busses() 1
-extern int isa_dma_bridge_buggy;
-
#ifdef CONFIG_PCI
static inline int pci_proc_domain(struct pci_bus *bus)
{
diff --git a/arch/ia64/include/asm/dma.h b/arch/ia64/include/asm/dma.h
index 59625e9c1f9c..eaed2626ffda 100644
--- a/arch/ia64/include/asm/dma.h
+++ b/arch/ia64/include/asm/dma.h
@@ -12,8 +12,6 @@
extern unsigned long MAX_DMA_ADDRESS;
-extern int isa_dma_bridge_buggy;
-
#define free_dma(x)
#endif /* _ASM_IA64_DMA_H */
diff --git a/arch/m68k/include/asm/dma.h b/arch/m68k/include/asm/dma.h
index f6c5e0dfb4e5..1c8d9c5bc2fa 100644
--- a/arch/m68k/include/asm/dma.h
+++ b/arch/m68k/include/asm/dma.h
@@ -6,10 +6,4 @@
bootmem allocator (but this should do it for this) */
#define MAX_DMA_ADDRESS PAGE_OFFSET
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
#endif /* _M68K_DMA_H */
diff --git a/arch/microblaze/include/asm/dma.h b/arch/microblaze/include/asm/dma.h
index f801582be912..7484c9eb66c4 100644
--- a/arch/microblaze/include/asm/dma.h
+++ b/arch/microblaze/include/asm/dma.h
@@ -9,10 +9,4 @@
/* Virtual address corresponding to last available physical memory address. */
#define MAX_DMA_ADDRESS (CONFIG_KERNEL_START + memory_size - 1)
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
#endif /* _ASM_MICROBLAZE_DMA_H */
diff --git a/arch/mips/include/asm/dma.h b/arch/mips/include/asm/dma.h
index be726b943530..d6186e6bea7e 100644
--- a/arch/mips/include/asm/dma.h
+++ b/arch/mips/include/asm/dma.h
@@ -307,12 +307,4 @@ static __inline__ int get_dma_residue(unsigned int dmanr)
extern int request_dma(unsigned int dmanr, const char * device_id); /* reserve a DMA channel */
extern void free_dma(unsigned int dmanr); /* release it again */
-/* From PCI */
-
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
#endif /* _ASM_DMA_H */
diff --git a/arch/parisc/include/asm/dma.h b/arch/parisc/include/asm/dma.h
index eea80ed34e6d..9e8c101de902 100644
--- a/arch/parisc/include/asm/dma.h
+++ b/arch/parisc/include/asm/dma.h
@@ -176,10 +176,4 @@ static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
#define free_dma(dmanr)
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
#endif /* _ASM_DMA_H */
diff --git a/arch/powerpc/include/asm/dma.h b/arch/powerpc/include/asm/dma.h
index 6161a9596196..d97c66d9ae34 100644
--- a/arch/powerpc/include/asm/dma.h
+++ b/arch/powerpc/include/asm/dma.h
@@ -340,11 +340,5 @@ extern int request_dma(unsigned int dmanr, const char *device_id);
/* release it again */
extern void free_dma(unsigned int dmanr);
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_DMA_H */
diff --git a/arch/riscv/include/asm/pci.h b/arch/riscv/include/asm/pci.h
index a7b8f0d0df7f..f904df586c03 100644
--- a/arch/riscv/include/asm/pci.h
+++ b/arch/riscv/include/asm/pci.h
@@ -20,8 +20,6 @@
#define ARCH_GENERIC_PCI_MMAP_RESOURCE 1
-extern int isa_dma_bridge_buggy;
-
#ifdef CONFIG_PCI
static inline int pci_proc_domain(struct pci_bus *bus)
{
diff --git a/arch/s390/include/asm/dma.h b/arch/s390/include/asm/dma.h
index 6f26f35d4a71..dec1c4ce628c 100644
--- a/arch/s390/include/asm/dma.h
+++ b/arch/s390/include/asm/dma.h
@@ -11,10 +11,4 @@
*/
#define MAX_DMA_ADDRESS 0x80000000
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
#endif /* _ASM_S390_DMA_H */
diff --git a/arch/sh/include/asm/dma.h b/arch/sh/include/asm/dma.h
index 17d23ae98c77..c8bee3f985a2 100644
--- a/arch/sh/include/asm/dma.h
+++ b/arch/sh/include/asm/dma.h
@@ -137,10 +137,4 @@ extern int register_chan_caps(const char *dmac, struct dma_chan_caps *capslist);
extern int dma_create_sysfs_files(struct dma_channel *, struct dma_info *);
extern void dma_remove_sysfs_files(struct dma_channel *, struct dma_info *);
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
#endif /* __ASM_SH_DMA_H */
diff --git a/arch/sparc/include/asm/dma.h b/arch/sparc/include/asm/dma.h
index 462e7c794a09..08043f35b110 100644
--- a/arch/sparc/include/asm/dma.h
+++ b/arch/sparc/include/asm/dma.h
@@ -82,14 +82,6 @@
#define DMA_BURST64 0x40
#define DMA_BURSTBITS 0x7f
-/* From PCI */
-
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
#ifdef CONFIG_SPARC32
struct device;
diff --git a/arch/um/include/asm/pci.h b/arch/um/include/asm/pci.h
index 26b96c02ef61..1211855aff34 100644
--- a/arch/um/include/asm/pci.h
+++ b/arch/um/include/asm/pci.h
@@ -9,8 +9,6 @@
#define pcibios_assign_all_busses() 1
-extern int isa_dma_bridge_buggy;
-
#ifdef CONFIG_PCI_DOMAINS
static inline int pci_proc_domain(struct pci_bus *bus)
{
diff --git a/arch/x86/include/asm/dma.h b/arch/x86/include/asm/dma.h
index 8e95aa4b0d17..8ae6e0e11b8b 100644
--- a/arch/x86/include/asm/dma.h
+++ b/arch/x86/include/asm/dma.h
@@ -307,12 +307,4 @@ extern int request_dma(unsigned int dmanr, const char *device_id);
extern void free_dma(unsigned int dmanr);
#endif
-/* From PCI */
-
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
#endif /* _ASM_X86_DMA_H */
diff --git a/arch/xtensa/include/asm/dma.h b/arch/xtensa/include/asm/dma.h
index bb099a373b5a..172644539032 100644
--- a/arch/xtensa/include/asm/dma.h
+++ b/arch/xtensa/include/asm/dma.h
@@ -52,11 +52,4 @@
extern int request_dma(unsigned int dmanr, const char * device_id);
extern void free_dma(unsigned int dmanr);
-#ifdef CONFIG_PCI
-extern int isa_dma_bridge_buggy;
-#else
-#define isa_dma_bridge_buggy (0)
-#endif
-
-
#endif
diff --git a/drivers/comedi/drivers/comedi_isadma.c b/drivers/comedi/drivers/comedi_isadma.c
index 700982464c53..020b3d1e1ac0 100644
--- a/drivers/comedi/drivers/comedi_isadma.c
+++ b/drivers/comedi/drivers/comedi_isadma.c
@@ -8,7 +8,7 @@
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
-#include <asm/dma.h>
+#include <linux/isa-dma.h>
#include <linux/comedi/comedidev.h>
#include <linux/comedi/comedi_isadma.h>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index cfaf40a540a8..60c55d2cb2cc 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -41,8 +41,10 @@ const char *pci_power_names[] = {
};
EXPORT_SYMBOL_GPL(pci_power_names);
+#ifdef CONFIG_X86_32
int isa_dma_bridge_buggy;
EXPORT_SYMBOL(isa_dma_bridge_buggy);
+#endif
int pci_pci_problems;
EXPORT_SYMBOL(pci_pci_problems);
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 41aeaa235132..6fc64509eee7 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -17,6 +17,7 @@
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/pci.h>
+#include <linux/isa-dma.h> /* isa_dma_bridge_buggy */
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/acpi.h>
@@ -30,7 +31,6 @@
#include <linux/pm_runtime.h>
#include <linux/suspend.h>
#include <linux/switchtec.h>
-#include <asm/dma.h> /* isa_dma_bridge_buggy */
#include "pci.h"
static ktime_t fixup_debug_start(struct pci_dev *dev,
@@ -239,6 +239,7 @@ static void quirk_passive_release(struct pci_dev *dev)
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82441, quirk_passive_release);
+#ifdef CONFIG_X86_32
/*
* The VIA VP2/VP3/MVP3 seem to have some 'features'. There may be a
* workaround but VIA don't answer queries. If you happen to have good
@@ -265,6 +266,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, quirk_isa_dma
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_1, quirk_isa_dma_hangs);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_2, quirk_isa_dma_hangs);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_CBUS_3, quirk_isa_dma_hangs);
+#endif
/*
* Intel NM10 "TigerPoint" LPC PM1a_STS.BM_STS must be clear
diff --git a/include/linux/isa-dma.h b/include/linux/isa-dma.h
new file mode 100644
index 000000000000..61504a8c1b9e
--- /dev/null
+++ b/include/linux/isa-dma.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __LINUX_ISA_DMA_H
+#define __LINUX_ISA_DMA_H
+
+#include <asm/dma.h>
+
+#if defined(CONFIG_PCI) && defined(CONFIG_X86_32)
+extern int isa_dma_bridge_buggy;
+#else
+#define isa_dma_bridge_buggy (0)
+#endif
+
+#endif /* __LINUX_ISA_DMA_H */
diff --git a/sound/core/isadma.c b/sound/core/isadma.c
index 1f45ede023b4..18a86212e3a8 100644
--- a/sound/core/isadma.c
+++ b/sound/core/isadma.c
@@ -12,8 +12,8 @@
#undef HAVE_REALLY_SLOW_DMA_CONTROLLER
#include <linux/export.h>
+#include <linux/isa-dma.h>
#include <sound/core.h>
-#include <asm/dma.h>
/**
* snd_dma_program - program an ISA DMA transfer
--
2.36.1
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