From: Christoph Hellwig <hch@lst.de>
To: iommu@lists.linux-foundation.org
Cc: linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
adi-buildroot-devel@lists.sourceforge.net,
linux-c6x-dev@linux-c6x.org, linux-cris-kernel@axis.com,
linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org,
linux-m68k@lists.linux-m68k.org, linux-metag@vger.kernel.org,
Michal Simek <monstr@monstr.eu>,
linux-mips@linux-mips.org, linux-parisc@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, patches@groups.riscv.org,
linux-s390@vger.kernel.org, linux-sh@vger.kernel.org,
sparclinux@vger.kernel.org, Guan Xuetao <gxt@mprc.pku.edu.cn>,
x86@kernel.org, linux-arch@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 25/67] dma-direct: rename dma_noop to dma_direct
Date: Fri, 29 Dec 2017 09:18:29 +0100 [thread overview]
Message-ID: <20171229081911.2802-26-hch@lst.de> (raw)
In-Reply-To: <20171229081911.2802-1-hch@lst.de>
The trivial direct mapping implementation already does a virtual to
physical translation which isn't strictly a noop, and will soon learn
to do non-direct but linear physical to dma translations through the
device offset and a few small tricks. Rename it to a better fitting
name.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
MAINTAINERS | 2 +-
arch/arm/Kconfig | 2 +-
arch/arm/include/asm/dma-mapping.h | 2 +-
arch/arm/mm/dma-mapping-nommu.c | 8 ++++----
arch/m32r/Kconfig | 2 +-
arch/riscv/Kconfig | 2 +-
arch/s390/Kconfig | 2 +-
include/asm-generic/dma-mapping.h | 2 +-
include/linux/dma-mapping.h | 2 +-
lib/Kconfig | 2 +-
lib/Makefile | 2 +-
lib/{dma-noop.c => dma-direct.c} | 35 +++++++++++++++--------------------
12 files changed, 29 insertions(+), 34 deletions(-)
rename lib/{dma-noop.c => dma-direct.c} (53%)
diff --git a/MAINTAINERS b/MAINTAINERS
index a8b35d9f41b2..b4005fe06e4c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4336,7 +4336,7 @@ T: git git://git.infradead.org/users/hch/dma-mapping.git
W: http://git.infradead.org/users/hch/dma-mapping.git
S: Supported
F: lib/dma-debug.c
-F: lib/dma-noop.c
+F: lib/dma-direct.c
F: lib/dma-virt.c
F: drivers/base/dma-mapping.c
F: drivers/base/dma-coherent.c
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 00d889a37965..430a0aa710d6 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -25,7 +25,7 @@ config ARM
select CLONE_BACKWARDS
select CPU_PM if (SUSPEND || CPU_IDLE)
select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
- select DMA_NOOP_OPS if !MMU
+ select DMA_DIRECT_OPS if !MMU
select EDAC_SUPPORT
select EDAC_ATOMIC_SCRUB
select GENERIC_ALLOCATOR
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index e5d9020c9ee1..8436f6ade57d 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -18,7 +18,7 @@ extern const struct dma_map_ops arm_coherent_dma_ops;
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
- return IS_ENABLED(CONFIG_MMU) ? &arm_dma_ops : &dma_noop_ops;
+ return IS_ENABLED(CONFIG_MMU) ? &arm_dma_ops : &dma_direct_ops;
}
#ifdef __arch_page_to_dma
diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c
index 1cced700e45a..49e9831dc0f1 100644
--- a/arch/arm/mm/dma-mapping-nommu.c
+++ b/arch/arm/mm/dma-mapping-nommu.c
@@ -22,7 +22,7 @@
#include "dma.h"
/*
- * dma_noop_ops is used if
+ * dma_direct_ops is used if
* - MMU/MPU is off
* - cpu is v7m w/o cache support
* - device is coherent
@@ -39,7 +39,7 @@ static void *arm_nommu_dma_alloc(struct device *dev, size_t size,
unsigned long attrs)
{
- const struct dma_map_ops *ops = &dma_noop_ops;
+ const struct dma_map_ops *ops = &dma_direct_ops;
void *ret;
/*
@@ -70,7 +70,7 @@ static void arm_nommu_dma_free(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_addr,
unsigned long attrs)
{
- const struct dma_map_ops *ops = &dma_noop_ops;
+ const struct dma_map_ops *ops = &dma_direct_ops;
if (attrs & DMA_ATTR_NON_CONSISTENT) {
ops->free(dev, size, cpu_addr, dma_addr, attrs);
@@ -214,7 +214,7 @@ EXPORT_SYMBOL(arm_nommu_dma_ops);
static const struct dma_map_ops *arm_nommu_get_dma_map_ops(bool coherent)
{
- return coherent ? &dma_noop_ops : &arm_nommu_dma_ops;
+ return coherent ? &dma_direct_ops : &arm_nommu_dma_ops;
}
void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index 498398d915c1..dd84ee194579 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -19,7 +19,7 @@ config M32R
select MODULES_USE_ELF_RELA
select HAVE_DEBUG_STACKOVERFLOW
select CPU_NO_EFFICIENT_FFS
- select DMA_NOOP_OPS
+ select DMA_DIRECT_OPS
select ARCH_NO_COHERENT_DMA_MMAP if !MMU
config SBUS
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 2c6adf12713a..865e14f50c14 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -83,7 +83,7 @@ config PGTABLE_LEVELS
config HAVE_KPROBES
def_bool n
-config DMA_NOOP_OPS
+config DMA_DIRECT_OPS
def_bool y
menu "Platform type"
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 829c67986db7..9376637229c9 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -140,7 +140,7 @@ config S390
select HAVE_DEBUG_KMEMLEAK
select HAVE_DMA_API_DEBUG
select HAVE_DMA_CONTIGUOUS
- select DMA_NOOP_OPS
+ select DMA_DIRECT_OPS
select HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_REGS
select HAVE_EFFICIENT_UNALIGNED_ACCESS
diff --git a/include/asm-generic/dma-mapping.h b/include/asm-generic/dma-mapping.h
index 164031531d85..880a292d792f 100644
--- a/include/asm-generic/dma-mapping.h
+++ b/include/asm-generic/dma-mapping.h
@@ -4,7 +4,7 @@
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
- return &dma_noop_ops;
+ return &dma_direct_ops;
}
#endif /* _ASM_GENERIC_DMA_MAPPING_H */
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 72568bf4fc12..ff3528de5322 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -143,7 +143,7 @@ struct dma_map_ops {
bool is_phys;
};
-extern const struct dma_map_ops dma_noop_ops;
+extern const struct dma_map_ops dma_direct_ops;
extern const struct dma_map_ops dma_virt_ops;
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
diff --git a/lib/Kconfig b/lib/Kconfig
index c5e84fbcb30b..9d3d649c9dc9 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -409,7 +409,7 @@ config HAS_DMA
depends on !NO_DMA
default y
-config DMA_NOOP_OPS
+config DMA_DIRECT_OPS
bool
depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
default n
diff --git a/lib/Makefile b/lib/Makefile
index d11c48ec8ffd..749851abe85a 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -28,7 +28,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
lib-$(CONFIG_MMU) += ioremap.o
lib-$(CONFIG_SMP) += cpumask.o
-lib-$(CONFIG_DMA_NOOP_OPS) += dma-noop.o
+lib-$(CONFIG_DMA_DIRECT_OPS) += dma-direct.o
lib-$(CONFIG_DMA_VIRT_OPS) += dma-virt.o
lib-y += kobject.o klist.o
diff --git a/lib/dma-noop.c b/lib/dma-direct.c
similarity index 53%
rename from lib/dma-noop.c
rename to lib/dma-direct.c
index c3728a0551f5..439db40854b7 100644
--- a/lib/dma-noop.c
+++ b/lib/dma-direct.c
@@ -10,9 +10,8 @@
#include <linux/scatterlist.h>
#include <linux/pfn.h>
-static void *dma_noop_alloc(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp,
- unsigned long attrs)
+static void *dma_direct_alloc(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
void *ret;
@@ -23,24 +22,21 @@ static void *dma_noop_alloc(struct device *dev, size_t size,
return ret;
}
-static void dma_noop_free(struct device *dev, size_t size,
- void *cpu_addr, dma_addr_t dma_addr,
- unsigned long attrs)
+static void dma_direct_free(struct device *dev, size_t size, void *cpu_addr,
+ dma_addr_t dma_addr, unsigned long attrs)
{
free_pages((unsigned long)cpu_addr, get_order(size));
}
-static dma_addr_t dma_noop_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- unsigned long attrs)
+static dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
+ unsigned long offset, size_t size, enum dma_data_direction dir,
+ unsigned long attrs)
{
return page_to_phys(page) + offset - PFN_PHYS(dev->dma_pfn_offset);
}
-static int dma_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
- enum dma_data_direction dir,
- unsigned long attrs)
+static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,
+ int nents, enum dma_data_direction dir, unsigned long attrs)
{
int i;
struct scatterlist *sg;
@@ -58,12 +54,11 @@ static int dma_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nent
return nents;
}
-const struct dma_map_ops dma_noop_ops = {
- .alloc = dma_noop_alloc,
- .free = dma_noop_free,
- .map_page = dma_noop_map_page,
- .map_sg = dma_noop_map_sg,
+const struct dma_map_ops dma_direct_ops = {
+ .alloc = dma_direct_alloc,
+ .free = dma_direct_free,
+ .map_page = dma_direct_map_page,
+ .map_sg = dma_direct_map_sg,
.is_phys = true,
};
-
-EXPORT_SYMBOL(dma_noop_ops);
+EXPORT_SYMBOL(dma_direct_ops);
--
2.14.2
next prev parent reply other threads:[~2017-12-29 8:21 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-29 8:18 consolidate direct dma mapping and swiotlb support Christoph Hellwig
2017-12-29 8:18 ` [PATCH 01/67] x86: remove X86_PPRO_FENCE Christoph Hellwig
2017-12-29 8:18 ` [PATCH 02/67] alpha: mark jensen as broken Christoph Hellwig
2018-01-02 10:36 ` Geert Uytterhoeven
2018-01-04 8:53 ` Christoph Hellwig
2017-12-29 8:18 ` [PATCH 03/67] dma-mapping: take dma_pfn_offset into account in dma_max_pfn Christoph Hellwig
2017-12-29 8:18 ` [PATCH 04/67] arm64: don't override dma_max_pfn Christoph Hellwig
2017-12-29 8:18 ` [PATCH 05/67] dma-mapping: replace PCI_DMA_BUS_IS_PHYS with a flag in struct dma_map_ops Christoph Hellwig
2018-01-02 10:39 ` Geert Uytterhoeven
2018-01-09 15:55 ` Jesper Nilsson
2017-12-29 8:18 ` [PATCH 06/67] hexagon: remove unused flush_write_buffers definition Christoph Hellwig
2018-01-09 3:13 ` Richard Kuo
2017-12-29 8:18 ` [PATCH 07/67] m32r: " Christoph Hellwig
2017-12-29 8:18 ` [PATCH 08/67] powerpc: " Christoph Hellwig
2017-12-29 8:18 ` [PATCH 09/67] arc: remove CONFIG_ARC_PLAT_NEEDS_PHYS_TO_DMA Christoph Hellwig
2018-01-05 19:45 ` Vineet Gupta
2017-12-29 8:18 ` [PATCH 10/67] m32r: remove the unused dma_capable helper Christoph Hellwig
2017-12-29 8:18 ` [PATCH 11/67] riscv: " Christoph Hellwig
2017-12-29 8:18 ` [PATCH 12/67] s390: " Christoph Hellwig
2017-12-29 8:18 ` [PATCH 13/67] dma-mapping: move swiotlb arch helpers to a new header Christoph Hellwig
2017-12-29 8:18 ` [PATCH 14/67] dma-mapping: move dma_mark_clean to dma-direct.h Christoph Hellwig
2017-12-29 8:18 ` [PATCH 15/67] hexagon: use the generic dma_capable helper Christoph Hellwig
2017-12-29 8:18 ` [PATCH 16/67] powerpc: rename dma_direct_ to dma_nommu_ Christoph Hellwig
2018-01-02 9:45 ` Michael Ellerman
2018-01-02 10:22 ` Geert Uytterhoeven
2018-01-03 6:24 ` Michael Ellerman
2018-01-03 7:49 ` Geert Uytterhoeven
2018-01-03 8:19 ` Julian Calaby
2018-01-04 8:48 ` Christoph Hellwig
2018-01-04 8:49 ` Christoph Hellwig
2018-01-09 15:38 ` Christoph Hellwig
2017-12-29 8:18 ` [PATCH 17/67] microblaze: rename dma_direct to dma_microblaze Christoph Hellwig
2017-12-29 10:11 ` Julian Calaby
2018-01-04 8:45 ` Christoph Hellwig
2017-12-29 8:18 ` [PATCH 18/67] microblaze: remove dma_nommu_dma_supported Christoph Hellwig
2017-12-29 8:18 ` [PATCH 19/67] microblaze: remove the dead !NOT_COHERENT_CACHE dma code Christoph Hellwig
2017-12-29 8:18 ` [PATCH 20/67] s390: move s390_pci_dma_ops to asm/pci_dma.h Christoph Hellwig
2017-12-29 8:18 ` [PATCH 21/67] dma-mapping: warn when there is no coherent_dma_mask Christoph Hellwig
2017-12-29 8:18 ` [PATCH 22/67] dma-mapping: clear harmful GFP_* flags in common code Christoph Hellwig
2018-01-02 10:38 ` Geert Uytterhoeven
2018-01-09 15:54 ` Jesper Nilsson
2017-12-29 8:18 ` [PATCH 23/67] dma-mapping: add an arch_dma_supported hook Christoph Hellwig
2017-12-29 8:18 ` [PATCH 24/67] dma-mapping: provide a generic asm/dma-mapping.h Christoph Hellwig
2017-12-29 8:18 ` Christoph Hellwig [this message]
2018-01-02 16:25 ` [PATCH 25/67] dma-direct: rename dma_noop to dma_direct Vladimir Murzin
2017-12-29 8:18 ` [PATCH 26/67] dma-direct: use phys_to_dma Christoph Hellwig
2018-01-02 16:26 ` Vladimir Murzin
2017-12-29 8:18 ` [PATCH 27/67] dma-direct: add dma address sanity checks Christoph Hellwig
2017-12-29 14:12 ` Geert Uytterhoeven
2018-01-04 8:52 ` Christoph Hellwig
2017-12-29 8:18 ` [PATCH 28/67] dma-direct: add support for CMA allocation Christoph Hellwig
2017-12-29 8:18 ` [PATCH 29/67] dma-direct: use node local allocations for coherent memory Christoph Hellwig
2018-01-02 10:29 ` Geert Uytterhoeven
2017-12-29 8:18 ` [PATCH 30/67] dma-direct: retry allocations using GFP_DMA for small masks Christoph Hellwig
2018-01-02 16:43 ` Vladimir Murzin
2018-01-04 9:02 ` Christoph Hellwig
2017-12-29 8:18 ` [PATCH 31/67] dma-direct: make dma_direct_{alloc, free} available to other implementations Christoph Hellwig
2018-01-02 16:44 ` Vladimir Murzin
2017-12-29 8:18 ` [PATCH 32/67] dma-direct: add support for allocation from ZONE_DMA and ZONE_DMA32 Christoph Hellwig
2017-12-29 8:18 ` [PATCH 33/67] dma-direct: reject too small dma masks Christoph Hellwig
2017-12-29 8:18 ` [PATCH 34/67] cris: use dma-direct Christoph Hellwig
2018-01-09 15:53 ` Jesper Nilsson
2017-12-29 8:18 ` [PATCH 35/67] h8300: " Christoph Hellwig
2017-12-29 8:18 ` [PATCH 36/67] x86: remove dma_alloc_coherent_mask Christoph Hellwig
2017-12-29 8:18 ` [PATCH 37/67] x86: use dma-direct Christoph Hellwig
2017-12-29 8:18 ` [PATCH 38/67] x86/amd_gart: clean up gart_alloc_coherent Christoph Hellwig
2017-12-29 8:18 ` [PATCH 39/67] iommu/amd_iommu: use dma_direct_* helpers for the direct mapping case Christoph Hellwig
2017-12-29 8:18 ` [PATCH 40/67] iommu/intel-iommu: " Christoph Hellwig
2017-12-29 8:18 ` [PATCH 41/67] x86: remove dma_alloc_coherent_gfp_flags Christoph Hellwig
2017-12-29 8:18 ` [PATCH 42/67] arm64: rename swiotlb_dma_ops Christoph Hellwig
2017-12-29 8:18 ` [PATCH 43/67] ia64: " Christoph Hellwig
2017-12-29 8:18 ` [PATCH 44/67] powerpc: " Christoph Hellwig
2017-12-29 8:18 ` [PATCH 45/67] swiotlb: rename swiotlb_free to swiotlb_exit Christoph Hellwig
2017-12-29 8:18 ` [PATCH 46/67] swiotlb: lift x86 swiotlb_dma_ops to common code Christoph Hellwig
2017-12-29 8:18 ` [PATCH 47/67] swiotlb: wire up ->dma_supported in swiotlb_dma_ops Christoph Hellwig
2017-12-29 8:18 ` [PATCH 48/67] swiotlb: rely on dev->coherent_dma_mask Christoph Hellwig
2017-12-29 8:18 ` [PATCH 49/67] swiotlb: refactor coherent buffer freeing Christoph Hellwig
2017-12-29 8:18 ` [PATCH 50/67] swiotlb: refactor coherent buffer allocation Christoph Hellwig
2017-12-29 8:18 ` [PATCH 51/67] set_memory.h: provide set_memory_{en,de}crypted stubs Christoph Hellwig
2017-12-29 8:18 ` [PATCH 52/67] dma-direct: handle the memory encryption bit in common code Christoph Hellwig
2017-12-29 8:18 ` [PATCH 53/67] swiotlb: remove swiotlb_set_mem_attributes Christoph Hellwig
2017-12-29 8:18 ` [PATCH 54/67] x86: remove sta2x11_dma_ops Christoph Hellwig
2017-12-29 8:18 ` [PATCH 55/67] ia64: replace ZONE_DMA with ZONE_DMA32 Christoph Hellwig
2017-12-29 8:19 ` [PATCH 56/67] ia64: use generic swiotlb_ops Christoph Hellwig
2017-12-29 8:19 ` [PATCH 57/67] ia64: clean up swiotlb support Christoph Hellwig
2017-12-29 8:19 ` [PATCH 58/67] ia64: remove an ifdef around the content of pci-dma.c Christoph Hellwig
2017-12-29 8:19 ` [PATCH 59/67] unicore32: use generic swiotlb_ops Christoph Hellwig
2017-12-29 8:19 ` [PATCH 60/67] tile: replace ZONE_DMA with ZONE_DMA32 Christoph Hellwig
2017-12-29 8:19 ` [PATCH 61/67] tile: use generic swiotlb_ops Christoph Hellwig
2017-12-29 8:19 ` [PATCH 62/67] mips/netlogic: remove swiotlb support Christoph Hellwig
2017-12-29 8:19 ` [PATCH 63/67] mips: use swiotlb_{alloc,free} Christoph Hellwig
2017-12-29 8:19 ` [PATCH 64/67] arm64: replace ZONE_DMA with ZONE_DMA32 Christoph Hellwig
2017-12-29 8:19 ` [PATCH 65/67] arm64: use swiotlb_alloc and swiotlb_free Christoph Hellwig
2017-12-29 8:19 ` [PATCH 66/67] swiotlb: remove swiotlb_{alloc,free}_coherent Christoph Hellwig
2017-12-29 8:19 ` [PATCH 67/67] swiotlb: remove various exports Christoph Hellwig
2017-12-29 10:52 ` consolidate direct dma mapping and swiotlb support Vladimir Murzin
2017-12-30 10:56 ` Christoph Hellwig
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