Re: add config symbols for arch_{setup,teardown}_dma_ops
Any chance to get a quick review on this small series? On Mon, Feb 04, 2019 at 09:14:18AM +0100, Christoph Hellwig wrote: > Hi all, > > this series adds kconfig symbols to indicate that the architecture > provides the arch_setup_dma_ops and arch_teardown_dma_ops hooks. > > This avoids polluting dma-mapping.h which is included by just about > every driver with implementation details, and also removes some > clutter. > ___ > iommu mailing list > io...@lists.linux-foundation.org > https://lists.linuxfoundation.org/mailman/listinfo/iommu ---end quoted text--- ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
dma_declare_coherent spring cleaning
Hi all, this series removes various bits of dead code and refactors the remaining functionality around dma_declare_coherent to be a somewhat more coherent code base. ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
[PATCH 02/12] device.h: dma_mem is only needed for HAVE_GENERIC_DMA_COHERENT
No need to carry an unused field around.
Signed-off-by: Christoph Hellwig
---
include/linux/device.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/linux/device.h b/include/linux/device.h
index 6cb4640b6160..be544400acdd 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -1017,8 +1017,10 @@ struct device {
struct list_headdma_pools; /* dma pools (if dma'ble) */
+#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
struct dma_coherent_mem *dma_mem; /* internal for coherent mem
override */
+#endif
#ifdef CONFIG_DMA_CMA
struct cma *cma_area; /* contiguous memory area for dma
allocations */
--
2.20.1
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[PATCH 01/12] mfd/sm501: depend on HAS_DMA
Currently the sm501 mfd driver can be compiled without any dependencies, but through the use of dma_declare_coherent it really depends on having DMA and iomem support. Normally we don't explicitly require DMA support as we have stubs for it if on UML, but in this case the driver selects support for dma_declare_coherent and thus also requires memmap support. Guard this by an explicit dependency. Signed-off-by: Christoph Hellwig --- drivers/mfd/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index f461460a2aeb..f15f6489803d 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1066,6 +1066,7 @@ config MFD_SI476X_CORE config MFD_SM501 tristate "Silicon Motion SM501" + depends on HAS_DMA ---help--- This is the core driver for the Silicon Motion SM501 multimedia companion chip. This device is a multifunction device which may -- 2.20.1 ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
[PATCH 04/12] of: select OF_RESERVED_MEM automatically
The OF_RESERVED_MEM can be used if we have either CMA or the generic declare coherent code built and we support the early flattened DT. So don't bother making it a user visible options that is selected by most configs that fit the above category, but just select it when the requirements are met. Signed-off-by: Christoph Hellwig --- arch/arc/Kconfig | 1 - arch/arm/Kconfig | 1 - arch/arm64/Kconfig | 1 - arch/csky/Kconfig| 1 - arch/powerpc/Kconfig | 1 - arch/xtensa/Kconfig | 1 - drivers/of/Kconfig | 5 ++--- 7 files changed, 2 insertions(+), 9 deletions(-) diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 376366a7db81..4103f23b6cea 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -44,7 +44,6 @@ config ARC select MODULES_USE_ELF_RELA select OF select OF_EARLY_FLATTREE - select OF_RESERVED_MEM select PCI_SYSCALL if PCI select PERF_USE_VMALLOC if ARC_CACHE_VIPT_ALIASING diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 664e918e2624..9395f138301a 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -101,7 +101,6 @@ config ARM select MODULES_USE_ELF_REL select NEED_DMA_MAP_STATE select OF_EARLY_FLATTREE if OF - select OF_RESERVED_MEM if OF select OLD_SIGACTION select OLD_SIGSUSPEND3 select PCI_SYSCALL if PCI diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index a4168d366127..1d22e969bdcb 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -163,7 +163,6 @@ config ARM64 select NEED_SG_DMA_LENGTH select OF select OF_EARLY_FLATTREE - select OF_RESERVED_MEM select PCI_DOMAINS_GENERIC if PCI select PCI_ECAM if (ACPI && PCI) select PCI_SYSCALL if PCI diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index 398113c845f5..0a9595afe9be 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -42,7 +42,6 @@ config CSKY select MODULES_USE_ELF_RELA if MODULES select OF select OF_EARLY_FLATTREE - select OF_RESERVED_MEM select PERF_USE_VMALLOC if CPU_CK610 select RTC_LIB select TIMER_OF diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 2890d36eb531..5cc4eea362c6 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -233,7 +233,6 @@ config PPC select NEED_SG_DMA_LENGTH select OF select OF_EARLY_FLATTREE - select OF_RESERVED_MEM select OLD_SIGACTIONif PPC32 select OLD_SIGSUSPEND select PCI_DOMAINS if PCI diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 20a0756f27ef..e242a405151e 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -447,7 +447,6 @@ config USE_OF bool "Flattened Device Tree support" select OF select OF_EARLY_FLATTREE - select OF_RESERVED_MEM help Include support for flattened device tree machine descriptions. diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig index ad3fcad4d75b..3607fd2810e4 100644 --- a/drivers/of/Kconfig +++ b/drivers/of/Kconfig @@ -81,10 +81,9 @@ config OF_MDIO OpenFirmware MDIO bus (Ethernet PHY) accessors config OF_RESERVED_MEM - depends on OF_EARLY_FLATTREE bool - help - Helpers to allow for reservation of memory regions + depends on OF_EARLY_FLATTREE + default y if HAVE_GENERIC_DMA_COHERENT || DMA_CMA config OF_RESOLVE bool -- 2.20.1 ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
[PATCH 03/12] of: mark early_init_dt_alloc_reserved_memory_arch static
This function is only used in of_reserved_mem.c, and never overridden
despite the __weak marker.
Signed-off-by: Christoph Hellwig
---
drivers/of/of_reserved_mem.c| 2 +-
include/linux/of_reserved_mem.h | 7 ---
2 files changed, 1 insertion(+), 8 deletions(-)
diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 1977ee0adcb1..9f165fc1d1a2 100644
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -26,7 +26,7 @@
static struct reserved_mem reserved_mem[MAX_RESERVED_REGIONS];
static int reserved_mem_count;
-int __init __weak early_init_dt_alloc_reserved_memory_arch(phys_addr_t size,
+static int __init early_init_dt_alloc_reserved_memory_arch(phys_addr_t size,
phys_addr_t align, phys_addr_t start, phys_addr_t end, bool nomap,
phys_addr_t *res_base)
{
diff --git a/include/linux/of_reserved_mem.h b/include/linux/of_reserved_mem.h
index 67ab8d271df3..60f541912ccf 100644
--- a/include/linux/of_reserved_mem.h
+++ b/include/linux/of_reserved_mem.h
@@ -35,13 +35,6 @@ int of_reserved_mem_device_init_by_idx(struct device *dev,
struct device_node *np, int idx);
void of_reserved_mem_device_release(struct device *dev);
-int early_init_dt_alloc_reserved_memory_arch(phys_addr_t size,
-phys_addr_t align,
-phys_addr_t start,
-phys_addr_t end,
-bool nomap,
-phys_addr_t *res_base);
-
void fdt_init_reserved_mem(void);
void fdt_reserved_mem_save_node(unsigned long node, const char *uname,
phys_addr_t base, phys_addr_t size);
--
2.20.1
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[PATCH 06/12] dma-mapping: improve selection of dma_declare_coherent availability
This API is primarily used through DT entries, but two architectures and two drivers call it directly. So instead of selecting the config symbol for random architectures pull it in implicitly for the actual users. Also rename the Kconfig option to describe the feature better. Signed-off-by: Christoph Hellwig --- arch/arc/Kconfig| 1 - arch/arm/Kconfig| 2 +- arch/arm64/Kconfig | 1 - arch/csky/Kconfig | 1 - arch/mips/Kconfig | 1 - arch/riscv/Kconfig | 1 - arch/sh/Kconfig | 2 +- arch/unicore32/Kconfig | 1 - arch/x86/Kconfig| 1 - drivers/mfd/Kconfig | 2 ++ drivers/of/Kconfig | 3 ++- include/linux/device.h | 2 +- include/linux/dma-mapping.h | 8 kernel/dma/Kconfig | 2 +- kernel/dma/Makefile | 2 +- 15 files changed, 13 insertions(+), 17 deletions(-) diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 4103f23b6cea..56e9397542e0 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -30,7 +30,6 @@ config ARC select HAVE_ARCH_TRACEHOOK select HAVE_DEBUG_STACKOVERFLOW select HAVE_FUTEX_CMPXCHG if FUTEX - select HAVE_GENERIC_DMA_COHERENT select HAVE_IOREMAP_PROT select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZMA diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 9395f138301a..25fbbd3cb91d 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -30,6 +30,7 @@ config ARM select CLONE_BACKWARDS select CPU_PM if SUSPEND || CPU_IDLE select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS + select DMA_DECLARE_COHERENT select DMA_REMAP if MMU select EDAC_SUPPORT select EDAC_ATOMIC_SCRUB @@ -72,7 +73,6 @@ config ARM select HAVE_FUNCTION_GRAPH_TRACER if !THUMB2_KERNEL select HAVE_FUNCTION_TRACER if !XIP_KERNEL select HAVE_GCC_PLUGINS - select HAVE_GENERIC_DMA_COHERENT select HAVE_HW_BREAKPOINT if PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7) select HAVE_IDE if PCI || ISA || PCMCIA select HAVE_IRQ_TIME_ACCOUNTING diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1d22e969bdcb..d558461a5107 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -137,7 +137,6 @@ config ARM64 select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_GRAPH_TRACER select HAVE_GCC_PLUGINS - select HAVE_GENERIC_DMA_COHERENT select HAVE_HW_BREAKPOINT if PERF_EVENTS select HAVE_IRQ_TIME_ACCOUNTING select HAVE_MEMBLOCK_NODE_MAP if NUMA diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index 0a9595afe9be..c009a8c63946 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -30,7 +30,6 @@ config CSKY select HAVE_ARCH_TRACEHOOK select HAVE_FUNCTION_TRACER select HAVE_FUNCTION_GRAPH_TRACER - select HAVE_GENERIC_DMA_COHERENT select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZO select HAVE_KERNEL_LZMA diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 0d14f51d0002..ba50dc2d37dc 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -56,7 +56,6 @@ config MIPS select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_GRAPH_TRACER select HAVE_FUNCTION_TRACER - select HAVE_GENERIC_DMA_COHERENT select HAVE_IDE select HAVE_IOREMAP_PROT select HAVE_IRQ_EXIT_ON_IRQ_STACK diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index feeeaa60697c..51b9c97751bf 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -32,7 +32,6 @@ config RISCV select HAVE_MEMBLOCK_NODE_MAP select HAVE_DMA_CONTIGUOUS select HAVE_FUTEX_CMPXCHG if FUTEX - select HAVE_GENERIC_DMA_COHERENT select HAVE_PERF_EVENTS select HAVE_SYSCALL_TRACEPOINTS select IRQ_DOMAIN diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig index a9c36f95744a..a3d2a24e75c7 100644 --- a/arch/sh/Kconfig +++ b/arch/sh/Kconfig @@ -7,11 +7,11 @@ config SUPERH select ARCH_NO_COHERENT_DMA_MMAP if !MMU select HAVE_PATA_PLATFORM select CLKDEV_LOOKUP + select DMA_DECLARE_COHERENT select HAVE_IDE if HAS_IOPORT_MAP select HAVE_MEMBLOCK_NODE_MAP select ARCH_DISCARD_MEMBLOCK select HAVE_OPROFILE - select HAVE_GENERIC_DMA_COHERENT select HAVE_ARCH_TRACEHOOK select HAVE_PERF_EVENTS select HAVE_DEBUG_BUGVERBOSE diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig index c3a41bfe161b..6d2891d37e32 100644 --- a/arch/unicore32/Kconfig +++ b/arch/unicore32/Kconfig @@ -4,7 +4,6 @@ config UNICORE32 select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO - select HAVE_GENERIC_DMA_COHERENT select HAVE_KERNEL_GZIP select HAVE_KERNEL_BZIP2 select GENERIC_ATOMIC64 diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig ind
[PATCH 05/12] dma-mapping: remove an incorrect __iommem annotation
memmap return a regular void pointer, not and __iomem one.
Signed-off-by: Christoph Hellwig
---
kernel/dma/coherent.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c
index 66f0fb7e9a3a..4b76aba574c2 100644
--- a/kernel/dma/coherent.c
+++ b/kernel/dma/coherent.c
@@ -43,7 +43,7 @@ static int dma_init_coherent_memory(
struct dma_coherent_mem **mem)
{
struct dma_coherent_mem *dma_mem = NULL;
- void __iomem *mem_base = NULL;
+ void *mem_base = NULL;
int pages = size >> PAGE_SHIFT;
int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
int ret;
--
2.20.1
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[PATCH 07/12] dma-mapping: move CONFIG_DMA_CMA to kernel/dma/Kconfig
This is where all the related code already lives. Signed-off-by: Christoph Hellwig --- drivers/base/Kconfig | 77 kernel/dma/Kconfig | 77 2 files changed, 77 insertions(+), 77 deletions(-) diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index 3e63a900b330..059700ea3521 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -191,83 +191,6 @@ config DMA_FENCE_TRACE lockup related problems for dma-buffers shared across multiple devices. -config DMA_CMA - bool "DMA Contiguous Memory Allocator" - depends on HAVE_DMA_CONTIGUOUS && CMA - help - This enables the Contiguous Memory Allocator which allows drivers - to allocate big physically-contiguous blocks of memory for use with - hardware components that do not support I/O map nor scatter-gather. - - You can disable CMA by specifying "cma=0" on the kernel's command - line. - - For more information see . - If unsure, say "n". - -if DMA_CMA -comment "Default contiguous memory area size:" - -config CMA_SIZE_MBYTES - int "Size in Mega Bytes" - depends on !CMA_SIZE_SEL_PERCENTAGE - default 0 if X86 - default 16 - help - Defines the size (in MiB) of the default memory area for Contiguous - Memory Allocator. If the size of 0 is selected, CMA is disabled by - default, but it can be enabled by passing cma=size[MG] to the kernel. - - -config CMA_SIZE_PERCENTAGE - int "Percentage of total memory" - depends on !CMA_SIZE_SEL_MBYTES - default 0 if X86 - default 10 - help - Defines the size of the default memory area for Contiguous Memory - Allocator as a percentage of the total memory in the system. - If 0 percent is selected, CMA is disabled by default, but it can be - enabled by passing cma=size[MG] to the kernel. - -choice - prompt "Selected region size" - default CMA_SIZE_SEL_MBYTES - -config CMA_SIZE_SEL_MBYTES - bool "Use mega bytes value only" - -config CMA_SIZE_SEL_PERCENTAGE - bool "Use percentage value only" - -config CMA_SIZE_SEL_MIN - bool "Use lower value (minimum)" - -config CMA_SIZE_SEL_MAX - bool "Use higher value (maximum)" - -endchoice - -config CMA_ALIGNMENT - int "Maximum PAGE_SIZE order of alignment for contiguous buffers" - range 4 12 - default 8 - help - DMA mapping framework by default aligns all buffers to the smallest - PAGE_SIZE order which is greater than or equal to the requested buffer - size. This works well for buffers up to a few hundreds kilobytes, but - for larger buffers it just a memory waste. With this parameter you can - specify the maximum PAGE_SIZE order for contiguous buffers. Larger - buffers will be aligned only to this specified order. The order is - expressed as a power of two multiplied by the PAGE_SIZE. - - For example, if your system defaults to 4KiB pages, the order value - of 8 means that the buffers will be aligned up to 1MiB only. - - If unsure, leave the default value "8". - -endif - config GENERIC_ARCH_TOPOLOGY bool help diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index b122ab100d66..d785286ad868 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -53,3 +53,80 @@ config DMA_REMAP config DMA_DIRECT_REMAP bool select DMA_REMAP + +config DMA_CMA + bool "DMA Contiguous Memory Allocator" + depends on HAVE_DMA_CONTIGUOUS && CMA + help + This enables the Contiguous Memory Allocator which allows drivers + to allocate big physically-contiguous blocks of memory for use with + hardware components that do not support I/O map nor scatter-gather. + + You can disable CMA by specifying "cma=0" on the kernel's command + line. + + For more information see . + If unsure, say "n". + +if DMA_CMA +comment "Default contiguous memory area size:" + +config CMA_SIZE_MBYTES + int "Size in Mega Bytes" + depends on !CMA_SIZE_SEL_PERCENTAGE + default 0 if X86 + default 16 + help + Defines the size (in MiB) of the default memory area for Contiguous + Memory Allocator. If the size of 0 is selected, CMA is disabled by + default, but it can be enabled by passing cma=size[MG] to the kernel. + + +config CMA_SIZE_PERCENTAGE + int "Percentage of total memory" + depends on !CMA_SIZE_SEL_MBYTES + default 0 if X86 + default 10 + help + Defines the size of the default memory area for Contiguous Memory + Allocator as a percentage of the total memory in the system. + If 0 percent is selected, CMA is disabled by default, but it can be + enabled by passing cma=size[MG]
[PATCH 09/12] dma-mapping: remove the DMA_MEMORY_EXCLUSIVE flag
All users of dma_declare_coherent want their allocations to be
exclusive, so default to exclusive allocations.
Signed-off-by: Christoph Hellwig
---
Documentation/DMA-API.txt | 9 +--
arch/arm/mach-imx/mach-imx27_visstrim_m10.c | 12 +++--
arch/arm/mach-imx/mach-mx31moboard.c | 3 +--
arch/sh/boards/mach-ap325rxa/setup.c | 5 ++--
arch/sh/boards/mach-ecovec24/setup.c | 6 ++---
arch/sh/boards/mach-kfr2r09/setup.c | 5 ++--
arch/sh/boards/mach-migor/setup.c | 5 ++--
arch/sh/boards/mach-se/7724/setup.c | 6 ++---
arch/sh/drivers/pci/fixups-dreamcast.c| 3 +--
.../soc_camera/sh_mobile_ceu_camera.c | 3 +--
drivers/usb/host/ohci-sm501.c | 3 +--
drivers/usb/host/ohci-tmio.c | 2 +-
include/linux/dma-mapping.h | 7 ++
kernel/dma/coherent.c | 25 ++-
14 files changed, 29 insertions(+), 65 deletions(-)
diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt
index b9d0cba83877..38e561b773b4 100644
--- a/Documentation/DMA-API.txt
+++ b/Documentation/DMA-API.txt
@@ -566,8 +566,7 @@ boundaries when doing this.
int
dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
- dma_addr_t device_addr, size_t size, int
- flags)
+ dma_addr_t device_addr, size_t size);
Declare region of memory to be handed out by dma_alloc_coherent() when
it's asked for coherent memory for this device.
@@ -581,12 +580,6 @@ dma_addr_t in dma_alloc_coherent()).
size is the size of the area (must be multiples of PAGE_SIZE).
-flags can be ORed together and are:
-
-- DMA_MEMORY_EXCLUSIVE - only allocate memory from the declared regions.
- Do not allow dma_alloc_coherent() to fall back to system memory when
- it's out of memory in the declared region.
-
As a simplification for the platforms, only *one* such region of
memory may be declared per device.
diff --git a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
index 5169dfba9718..07d4fcfe5c2e 100644
--- a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
+++ b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
@@ -258,8 +258,7 @@ static void __init visstrim_analog_camera_init(void)
return;
dma_declare_coherent_memory(&pdev->dev, mx2_camera_base,
- mx2_camera_base, MX2_CAMERA_BUF_SIZE,
- DMA_MEMORY_EXCLUSIVE);
+ mx2_camera_base, MX2_CAMERA_BUF_SIZE);
}
static void __init visstrim_reserve(void)
@@ -445,8 +444,7 @@ static void __init visstrim_coda_init(void)
dma_declare_coherent_memory(&pdev->dev,
mx2_camera_base + MX2_CAMERA_BUF_SIZE,
mx2_camera_base + MX2_CAMERA_BUF_SIZE,
- MX2_CAMERA_BUF_SIZE,
- DMA_MEMORY_EXCLUSIVE);
+ MX2_CAMERA_BUF_SIZE);
}
/* DMA deinterlace */
@@ -465,8 +463,7 @@ static void __init visstrim_deinterlace_init(void)
dma_declare_coherent_memory(&pdev->dev,
mx2_camera_base + 2 * MX2_CAMERA_BUF_SIZE,
mx2_camera_base + 2 * MX2_CAMERA_BUF_SIZE,
- MX2_CAMERA_BUF_SIZE,
- DMA_MEMORY_EXCLUSIVE);
+ MX2_CAMERA_BUF_SIZE);
}
/* Emma-PrP for format conversion */
@@ -485,8 +482,7 @@ static void __init visstrim_emmaprp_init(void)
*/
ret = dma_declare_coherent_memory(&pdev->dev,
mx2_camera_base, mx2_camera_base,
- MX2_CAMERA_BUF_SIZE,
- DMA_MEMORY_EXCLUSIVE);
+ MX2_CAMERA_BUF_SIZE);
if (ret)
pr_err("Failed to declare memory for emmaprp\n");
}
diff --git a/arch/arm/mach-imx/mach-mx31moboard.c
b/arch/arm/mach-imx/mach-mx31moboard.c
index 643a3d749703..fe50f4cf00a7 100644
--- a/arch/arm/mach-imx/mach-mx31moboard.c
+++ b/arch/arm/mach-imx/mach-mx31moboard.c
@@ -475,8 +475,7 @@ static int __init mx31moboard_init_cam(void)
ret = dma_declare_coherent_memory(&pdev->dev,
mx3_camera_base, mx3_camera_base,
- MX3_CAMERA_BUF_SIZE,
- DMA_MEMORY_EXCLUSIVE);
+ MX3_CAMERA_BUF_SIZE);
if (ret)
goto err;
diff --git a/arch/sh/boards/mach-ap325rxa/setup.c
b/arch/sh/boards/mach-ap325rxa/setup.c
index 8f234d0435aa..7899b4f51fdd 100644
--- a/arch/sh/boards/mach-ap325rxa/
[PATCH 08/12] dma-mapping: remove dma_mark_declared_memory_occupied
This API is not used anywhere, so remove it.
Signed-off-by: Christoph Hellwig
---
Documentation/DMA-API.txt | 17 -
include/linux/dma-mapping.h | 9 -
kernel/dma/coherent.c | 23 ---
3 files changed, 49 deletions(-)
diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt
index 78114ee63057..b9d0cba83877 100644
--- a/Documentation/DMA-API.txt
+++ b/Documentation/DMA-API.txt
@@ -605,23 +605,6 @@ unconditionally having removed all the required
structures. It is the
driver's job to ensure that no parts of this memory region are
currently in use.
-::
-
- void *
- dma_mark_declared_memory_occupied(struct device *dev,
- dma_addr_t device_addr, size_t size)
-
-This is used to occupy specific regions of the declared space
-(dma_alloc_coherent() will hand out the first free region it finds).
-
-device_addr is the *device* address of the region requested.
-
-size is the size (and should be a page-sized multiple).
-
-The return value will be either a pointer to the processor virtual
-address of the memory, or an error (via PTR_ERR()) if any part of the
-region is occupied.
-
Part III - Debug drivers use of the DMA-API
---
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index fde0cfc71824..9df0f4d318c5 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -735,8 +735,6 @@ static inline int dma_get_cache_alignment(void)
int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
dma_addr_t device_addr, size_t size, int flags);
void dma_release_declared_memory(struct device *dev);
-void *dma_mark_declared_memory_occupied(struct device *dev,
- dma_addr_t device_addr, size_t size);
#else
static inline int
dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
@@ -749,13 +747,6 @@ static inline void
dma_release_declared_memory(struct device *dev)
{
}
-
-static inline void *
-dma_mark_declared_memory_occupied(struct device *dev,
- dma_addr_t device_addr, size_t size)
-{
- return ERR_PTR(-EBUSY);
-}
#endif /* CONFIG_DMA_DECLARE_COHERENT */
static inline void *dmam_alloc_coherent(struct device *dev, size_t size,
diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c
index 4b76aba574c2..1d12a31af6d7 100644
--- a/kernel/dma/coherent.c
+++ b/kernel/dma/coherent.c
@@ -137,29 +137,6 @@ void dma_release_declared_memory(struct device *dev)
}
EXPORT_SYMBOL(dma_release_declared_memory);
-void *dma_mark_declared_memory_occupied(struct device *dev,
- dma_addr_t device_addr, size_t size)
-{
- struct dma_coherent_mem *mem = dev->dma_mem;
- unsigned long flags;
- int pos, err;
-
- size += device_addr & ~PAGE_MASK;
-
- if (!mem)
- return ERR_PTR(-EINVAL);
-
- spin_lock_irqsave(&mem->spinlock, flags);
- pos = PFN_DOWN(device_addr - dma_get_device_base(dev, mem));
- err = bitmap_allocate_region(mem->bitmap, pos, get_order(size));
- spin_unlock_irqrestore(&mem->spinlock, flags);
-
- if (err != 0)
- return ERR_PTR(err);
- return mem->virt_base + (pos << PAGE_SHIFT);
-}
-EXPORT_SYMBOL(dma_mark_declared_memory_occupied);
-
static void *__dma_alloc_from_coherent(struct dma_coherent_mem *mem,
ssize_t size, dma_addr_t *dma_handle)
{
--
2.20.1
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[PATCH 10/12] dma-mapping: simplify allocations from per-device coherent memory
All users of per-device coherent memory are exclusive, that is if we can't
allocate from the per-device pool we can't use the system memory either.
Unfold the current dma_{alloc,free}_from_dev_coherent implementation and
always use the per-device pool if it exists.
Signed-off-by: Christoph Hellwig
---
arch/arm/mm/dma-mapping-nommu.c | 12 ++---
include/linux/dma-mapping.h | 14 ++
kernel/dma/coherent.c | 89 -
kernel/dma/internal.h | 19 +++
kernel/dma/mapping.c| 12 +++--
5 files changed, 55 insertions(+), 91 deletions(-)
create mode 100644 kernel/dma/internal.h
diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c
index f304b10e23a4..c72f024f1e82 100644
--- a/arch/arm/mm/dma-mapping-nommu.c
+++ b/arch/arm/mm/dma-mapping-nommu.c
@@ -70,16 +70,10 @@ static void arm_nommu_dma_free(struct device *dev, size_t
size,
void *cpu_addr, dma_addr_t dma_addr,
unsigned long attrs)
{
- if (attrs & DMA_ATTR_NON_CONSISTENT) {
+ if (attrs & DMA_ATTR_NON_CONSISTENT)
dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs);
- } else {
- int ret = dma_release_from_global_coherent(get_order(size),
- cpu_addr);
-
- WARN_ON_ONCE(ret == 0);
- }
-
- return;
+ else
+ dma_release_from_global_coherent(size, cpu_addr);
}
static int arm_nommu_dma_mmap(struct device *dev, struct vm_area_struct *vma,
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index b12fba725f19..018e37a0870e 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -158,30 +158,24 @@ static inline int is_device_dma_capable(struct device
*dev)
* These three functions are only for dma allocator.
* Don't use them in device drivers.
*/
-int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size,
- dma_addr_t *dma_handle, void **ret);
-int dma_release_from_dev_coherent(struct device *dev, int order, void *vaddr);
-
int dma_mmap_from_dev_coherent(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, size_t size, int *ret);
-void *dma_alloc_from_global_coherent(ssize_t size, dma_addr_t *dma_handle);
-int dma_release_from_global_coherent(int order, void *vaddr);
+void *dma_alloc_from_global_coherent(size_t size, dma_addr_t *dma_handle);
+void dma_release_from_global_coherent(size_t size, void *vaddr);
int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
size_t size, int *ret);
#else
-#define dma_alloc_from_dev_coherent(dev, size, handle, ret) (0)
-#define dma_release_from_dev_coherent(dev, order, vaddr) (0)
#define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0)
-static inline void *dma_alloc_from_global_coherent(ssize_t size,
+static inline void *dma_alloc_from_global_coherent(size_t size,
dma_addr_t *dma_handle)
{
return NULL;
}
-static inline int dma_release_from_global_coherent(int order, void *vaddr)
+static inline void dma_release_from_global_coherent(size_t size, void *vaddr)
{
return 0;
}
diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c
index 29fd6590dc1e..d1da1048e470 100644
--- a/kernel/dma/coherent.c
+++ b/kernel/dma/coherent.c
@@ -8,6 +8,7 @@
#include
#include
#include
+#include "internal.h"
struct dma_coherent_mem {
void*virt_base;
@@ -21,13 +22,6 @@ struct dma_coherent_mem {
static struct dma_coherent_mem *dma_coherent_default_memory __ro_after_init;
-static inline struct dma_coherent_mem *dev_get_coherent_memory(struct device
*dev)
-{
- if (dev && dev->dma_mem)
- return dev->dma_mem;
- return NULL;
-}
-
static inline dma_addr_t dma_get_device_base(struct device *dev,
struct dma_coherent_mem * mem)
{
@@ -135,8 +129,8 @@ void dma_release_declared_memory(struct device *dev)
}
EXPORT_SYMBOL(dma_release_declared_memory);
-static void *__dma_alloc_from_coherent(struct dma_coherent_mem *mem,
- ssize_t size, dma_addr_t *dma_handle)
+void *__dma_alloc_from_coherent(struct dma_coherent_mem *mem, size_t size,
+ dma_addr_t *dma_handle)
{
int order = get_order(size);
unsigned long flags;
@@ -165,33 +159,7 @@ static void *__dma_alloc_from_coherent(struct
dma_coherent_mem *mem,
return NULL;
}
-/**
- * dma_alloc_from_dev_coherent() - allocate memory from device coherent pool
- * @dev: device from which we allocate memory
- * @size: size of requested memory area
- * @dma_handle:This will be filled with the correct dma handle
- * @ret: This pointer will be filled with the vi
[PATCH 11/12] dma-mapping: handle per-device coherent memory mmap in common code
We handle allocation and freeing in common code, so we should handle
mmap the same way. Also all users of per-device coherent memory are
exclusive, that is if we can't allocate from the per-device pool we
can't use the system memory either. Unfold the current
dma_mmap_from_dev_coherent implementation and always use the
per-device pool if it exists.
Signed-off-by: Christoph Hellwig
---
arch/arm/mm/dma-mapping-nommu.c | 7 ++--
arch/arm/mm/dma-mapping.c | 3 --
arch/arm64/mm/dma-mapping.c | 3 --
include/linux/dma-mapping.h | 11 ++-
kernel/dma/coherent.c | 58 -
kernel/dma/internal.h | 2 ++
kernel/dma/mapping.c| 8 ++---
7 files changed, 24 insertions(+), 68 deletions(-)
diff --git a/arch/arm/mm/dma-mapping-nommu.c b/arch/arm/mm/dma-mapping-nommu.c
index c72f024f1e82..4eeb7e5d9c07 100644
--- a/arch/arm/mm/dma-mapping-nommu.c
+++ b/arch/arm/mm/dma-mapping-nommu.c
@@ -80,11 +80,8 @@ static int arm_nommu_dma_mmap(struct device *dev, struct
vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
unsigned long attrs)
{
- int ret;
-
- if (dma_mmap_from_global_coherent(vma, cpu_addr, size, &ret))
- return ret;
-
+ if (!(attrs & DMA_ATTR_NON_CONSISTENT))
+ return dma_mmap_from_global_coherent(vma, cpu_addr, size);
return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
}
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 3c8534904209..e2993e5a7166 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -830,9 +830,6 @@ static int __arm_dma_mmap(struct device *dev, struct
vm_area_struct *vma,
unsigned long pfn = dma_to_pfn(dev, dma_addr);
unsigned long off = vma->vm_pgoff;
- if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret))
- return ret;
-
if (off < nr_pages && nr_vma_pages <= (nr_pages - off)) {
ret = remap_pfn_range(vma, vma->vm_start,
pfn + off,
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 78c0a72f822c..a55be91c1d1a 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -246,9 +246,6 @@ static int __iommu_mmap_attrs(struct device *dev, struct
vm_area_struct *vma,
vma->vm_page_prot = arch_dma_mmap_pgprot(dev, vma->vm_page_prot, attrs);
- if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret))
- return ret;
-
if (attrs & DMA_ATTR_FORCE_CONTIGUOUS) {
/*
* DMA_ATTR_FORCE_CONTIGUOUS allocations are always remapped,
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 018e37a0870e..ae6fe66f97b7 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -158,17 +158,12 @@ static inline int is_device_dma_capable(struct device
*dev)
* These three functions are only for dma allocator.
* Don't use them in device drivers.
*/
-int dma_mmap_from_dev_coherent(struct device *dev, struct vm_area_struct *vma,
- void *cpu_addr, size_t size, int *ret);
-
void *dma_alloc_from_global_coherent(size_t size, dma_addr_t *dma_handle);
void dma_release_from_global_coherent(size_t size, void *vaddr);
int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
- size_t size, int *ret);
+ size_t size);
#else
-#define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0)
-
static inline void *dma_alloc_from_global_coherent(size_t size,
dma_addr_t *dma_handle)
{
@@ -177,12 +172,10 @@ static inline void *dma_alloc_from_global_coherent(size_t
size,
static inline void dma_release_from_global_coherent(size_t size, void *vaddr)
{
- return 0;
}
static inline int dma_mmap_from_global_coherent(struct vm_area_struct *vma,
- void *cpu_addr, size_t size,
- int *ret)
+ void *cpu_addr, size_t size)
{
return 0;
}
diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c
index d1da1048e470..d7a27008f228 100644
--- a/kernel/dma/coherent.c
+++ b/kernel/dma/coherent.c
@@ -197,60 +197,30 @@ void dma_release_from_global_coherent(size_t size, void
*vaddr)
__dma_release_from_coherent(dma_coherent_default_memory, size, vaddr);
}
-static int __dma_mmap_from_coherent(struct dma_coherent_mem *mem,
- struct vm_area_struct *vma, void *vaddr, size_t size, int *ret)
+int __dma_mmap_from_coherent(struct dma_coherent_mem *mem,
+ struct vm_area_struct *vma, void *vaddr, size_t size)
{
- if (mem && vaddr >= mem->virt_base && vaddr +
[PATCH 12/12] dma-mapping: remove dma_assign_coherent_memory
The only useful bit in this function was the already assigned check.
Once that is moved to dma_init_coherent_memory thee rest can easily
be handled in the two callers.
Signed-off-by: Christoph Hellwig
---
kernel/dma/coherent.c | 47 +--
1 file changed, 14 insertions(+), 33 deletions(-)
diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c
index d7a27008f228..1e3ce71cd993 100644
--- a/kernel/dma/coherent.c
+++ b/kernel/dma/coherent.c
@@ -41,6 +41,9 @@ static int dma_init_coherent_memory(phys_addr_t phys_addr,
int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
int ret;
+ if (*mem)
+ return -EBUSY;
+
if (!size) {
ret = -EINVAL;
goto out;
@@ -88,33 +91,11 @@ static void dma_release_coherent_memory(struct
dma_coherent_mem *mem)
kfree(mem);
}
-static int dma_assign_coherent_memory(struct device *dev,
- struct dma_coherent_mem *mem)
-{
- if (!dev)
- return -ENODEV;
-
- if (dev->dma_mem)
- return -EBUSY;
-
- dev->dma_mem = mem;
- return 0;
-}
-
int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
dma_addr_t device_addr, size_t size)
{
- struct dma_coherent_mem *mem;
- int ret;
-
- ret = dma_init_coherent_memory(phys_addr, device_addr, size, &mem);
- if (ret)
- return ret;
-
- ret = dma_assign_coherent_memory(dev, mem);
- if (ret)
- dma_release_coherent_memory(mem);
- return ret;
+ return dma_init_coherent_memory(phys_addr, device_addr, size,
+ &dev->dma_mem);
}
EXPORT_SYMBOL(dma_declare_coherent_memory);
@@ -238,18 +219,18 @@ static int rmem_dma_device_init(struct reserved_mem
*rmem, struct device *dev)
struct dma_coherent_mem *mem = rmem->priv;
int ret;
- if (!mem) {
- ret = dma_init_coherent_memory(rmem->base, rmem->base,
- rmem->size, &mem);
- if (ret) {
- pr_err("Reserved memory: failed to init DMA memory pool
at %pa, size %ld MiB\n",
- &rmem->base, (unsigned long)rmem->size / SZ_1M);
- return ret;
- }
+ ret = dma_init_coherent_memory(rmem->base, rmem->base, rmem->size,
+ &mem);
+ if (ret && ret != -EBUSY) {
+ pr_err("Reserved memory: failed to init DMA memory pool at %pa,
size %ld MiB\n",
+ &rmem->base, (unsigned long)rmem->size / SZ_1M);
+ return ret;
}
+
mem->use_dev_dma_pfn_offset = true;
+ if (dev)
+ dev->dma_mem = mem;
rmem->priv = mem;
- dma_assign_coherent_memory(dev, mem);
return 0;
}
--
2.20.1
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Re: add config symbols for arch_{setup,teardown}_dma_ops
On Mon, Feb 11, 2019 at 02:21:56PM +0100, Christoph Hellwig wrote: > Any chance to get a quick review on this small series? For arm64: Acked-by: Catalin Marinas ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
Re: [PATCH 1/2] dma-mapping: add a kconfig symbol for arch_setup_dma_ops availability
+CC Eugeniy As resident ARC DMA expert can you please this a quick spin. -Vineet On 2/4/19 12:14 AM, Christoph Hellwig wrote: > Signed-off-by: Christoph Hellwig > --- > arch/arc/Kconfig | 1 + > arch/arc/include/asm/Kbuild | 1 + > arch/arc/include/asm/dma-mapping.h | 13 - > arch/arm/Kconfig | 1 + > arch/arm/include/asm/dma-mapping.h | 4 > arch/arm64/Kconfig | 1 + > arch/arm64/include/asm/dma-mapping.h | 4 > arch/mips/Kconfig| 1 + > arch/mips/include/asm/dma-mapping.h | 10 -- > arch/mips/mm/dma-noncoherent.c | 8 > include/linux/dma-mapping.h | 12 > kernel/dma/Kconfig | 3 +++ > 12 files changed, 24 insertions(+), 35 deletions(-) > delete mode 100644 arch/arc/include/asm/dma-mapping.h > > diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig > index 376366a7db81..2ab27d88eb1c 100644 > --- a/arch/arc/Kconfig > +++ b/arch/arc/Kconfig > @@ -11,6 +11,7 @@ config ARC > select ARC_TIMERS > select ARCH_HAS_DMA_COHERENT_TO_PFN > select ARCH_HAS_PTE_SPECIAL > + select ARCH_HAS_SETUP_DMA_OPS > select ARCH_HAS_SYNC_DMA_FOR_CPU > select ARCH_HAS_SYNC_DMA_FOR_DEVICE > select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC > diff --git a/arch/arc/include/asm/Kbuild b/arch/arc/include/asm/Kbuild > index caa270261521..b41f8881ecc8 100644 > --- a/arch/arc/include/asm/Kbuild > +++ b/arch/arc/include/asm/Kbuild > @@ -3,6 +3,7 @@ generic-y += bugs.h > generic-y += compat.h > generic-y += device.h > generic-y += div64.h > +generic-y += dma-mapping.h > generic-y += emergency-restart.h > generic-y += extable.h > generic-y += ftrace.h > diff --git a/arch/arc/include/asm/dma-mapping.h > b/arch/arc/include/asm/dma-mapping.h > deleted file mode 100644 > index c946c0a83e76.. > --- a/arch/arc/include/asm/dma-mapping.h > +++ /dev/null > @@ -1,13 +0,0 @@ > -// SPDX-License-Identifier: GPL-2.0 > -// (C) 2018 Synopsys, Inc. (www.synopsys.com) > - > -#ifndef ASM_ARC_DMA_MAPPING_H > -#define ASM_ARC_DMA_MAPPING_H > - > -#include > - > -void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, > - const struct iommu_ops *iommu, bool coherent); > -#define arch_setup_dma_ops arch_setup_dma_ops > - > -#endif > diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig > index 664e918e2624..c1cf44f00870 100644 > --- a/arch/arm/Kconfig > +++ b/arch/arm/Kconfig > @@ -12,6 +12,7 @@ config ARM > select ARCH_HAS_MEMBARRIER_SYNC_CORE > select ARCH_HAS_PTE_SPECIAL if ARM_LPAE > select ARCH_HAS_PHYS_TO_DMA > + select ARCH_HAS_SETUP_DMA_OPS > select ARCH_HAS_SET_MEMORY > select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL > select ARCH_HAS_STRICT_MODULE_RWX if MMU > diff --git a/arch/arm/include/asm/dma-mapping.h > b/arch/arm/include/asm/dma-mapping.h > index 31d3b96f0f4b..a224b6e39e58 100644 > --- a/arch/arm/include/asm/dma-mapping.h > +++ b/arch/arm/include/asm/dma-mapping.h > @@ -96,10 +96,6 @@ static inline unsigned long dma_max_pfn(struct device *dev) > } > #define dma_max_pfn(dev) dma_max_pfn(dev) > > -#define arch_setup_dma_ops arch_setup_dma_ops > -extern void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, > -const struct iommu_ops *iommu, bool coherent); > - > #ifdef CONFIG_MMU > #define arch_teardown_dma_ops arch_teardown_dma_ops > extern void arch_teardown_dma_ops(struct device *dev); > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index a4168d366127..63909f318d56 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -22,6 +22,7 @@ config ARM64 > select ARCH_HAS_KCOV > select ARCH_HAS_MEMBARRIER_SYNC_CORE > select ARCH_HAS_PTE_SPECIAL > + select ARCH_HAS_SETUP_DMA_OPS > select ARCH_HAS_SET_MEMORY > select ARCH_HAS_STRICT_KERNEL_RWX > select ARCH_HAS_STRICT_MODULE_RWX > diff --git a/arch/arm64/include/asm/dma-mapping.h > b/arch/arm64/include/asm/dma-mapping.h > index 95dbf3ef735a..de96507ee2c1 100644 > --- a/arch/arm64/include/asm/dma-mapping.h > +++ b/arch/arm64/include/asm/dma-mapping.h > @@ -29,10 +29,6 @@ static inline const struct dma_map_ops > *get_arch_dma_ops(struct bus_type *bus) > return NULL; > } > > -void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size, > - const struct iommu_ops *iommu, bool coherent); > -#define arch_setup_dma_ops arch_setup_dma_ops > - > #ifdef CONFIG_IOMMU_DMA > void arch_teardown_dma_ops(struct device *dev); > #define arch_teardown_dma_opsarch_teardown_dma_ops > diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig > index 0d14f51d0002..dc5d70f674e0 100644 > --- a/arch/mips/Kconfig > +++ b/arch/mips/Kconfig > @@ -1118,6 +1118,7 @@ config DMA_MAYBE_COHERENT > > config DMA_PERDEV_COHERENT > bool > + select ARCH_HAS_SETUP_DMA_OPS
Re: [RFC 1/2] ARC: U-boot: check arguments paranoidly
Ping ! Are you happy with approach ?
-Vineet
On 2/6/19 2:13 PM, Vineet Gupta wrote:
> On 2/6/19 9:22 AM, Eugeniy Paltsev wrote:
>> Handle U-boot arguments paranoidly:
>> * don't allow to pass unknown tag.
>> * try to use external device tree blob only if corresponding tag
>>(TAG_DTB) is set.
>> * don't check: uboot_tag if kernel build with no ARC_UBOOT_SUPPORT.
>>
>> While I'm at it refactor U-boot arguments handling code.
>>
>> Signed-off-by: Eugeniy Paltsev
>> ---
>> arch/arc/kernel/head.S | 2 +-
>> arch/arc/kernel/setup.c | 65
>> -
>> 2 files changed, 44 insertions(+), 23 deletions(-)
>>
>> diff --git a/arch/arc/kernel/head.S b/arch/arc/kernel/head.S
>> index 8b90d25a15cc..7095055bb874 100644
>> --- a/arch/arc/kernel/head.S
>> +++ b/arch/arc/kernel/head.S
>> @@ -95,7 +95,7 @@ ENTRY(stext)
>> ;r0 = [0] No uboot interaction, [1] cmdline in r2, [2] DTB in r2
>> ;r1 = magic number (board identity, unused as of now
>> ;r2 = pointer to uboot provided cmdline or external DTB in mem
>> -; These are handled later in setup_arch()
>> +; These are handled later in handle_uboot_args()
>> st r0, [@uboot_tag]
>> st r2, [@uboot_arg]
>> #endif
>> diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
>> index feb90093e6b1..7edb35c26322 100644
>> --- a/arch/arc/kernel/setup.c
>> +++ b/arch/arc/kernel/setup.c
>> @@ -462,43 +462,64 @@ void setup_processor(void)
>> arc_chk_core_config();
>> }
>>
>> -static inline int is_kernel(unsigned long addr)
>> +static inline bool is_kernel(unsigned long addr)
>> {
>> -if (addr >= (unsigned long)_stext && addr <= (unsigned long)_end)
>> -return 1;
>> -return 0;
>> +return addr >= (unsigned long)_stext && addr <= (unsigned long)_end;
>> }
>>
>> -void __init setup_arch(char **cmdline_p)
>> +/* uboot_tag values for U-boot - kernel ABI revisions 0+; see head.S */
>> +#define UBOOT_REV0P_TAG_NONE0
>> +#define UBOOT_REV0P_TAG_CMDLINE 1
>> +#define UBOOT_REV0P_TAG_DTB 2
>> +
>> +void __init handle_uboot_args(void)
>> {
>> +bool append_boot_cmdline = false;
>> +bool use_embedded_dtb = true;
>> +
>> #ifdef CONFIG_ARC_UBOOT_SUPPORT
>> +/* check that we know this tag */
>> +if (uboot_tag != UBOOT_REV0P_TAG_NONE &&
>> +uboot_tag != UBOOT_REV0P_TAG_CMDLINE &&
>> +uboot_tag != UBOOT_REV0P_TAG_DTB)
>> +panic("Invalid uboot tag: '%08x'\n", uboot_tag);
>> +
>> /* make sure that uboot passed pointer to cmdline/dtb is valid */
>> -if (uboot_tag && is_kernel((unsigned long)uboot_arg))
>> +if (uboot_tag != UBOOT_REV0P_TAG_NONE && is_kernel((unsigned
>> long)uboot_arg))
>> panic("Invalid uboot arg\n");
>>
>> /* See if u-boot passed an external Device Tree blob */
>> -machine_desc = setup_machine_fdt(uboot_arg);/* uboot_tag == 2 */
>> -if (!machine_desc)
>> +if (uboot_tag == UBOOT_REV0P_TAG_DTB) {
>> +machine_desc = setup_machine_fdt(uboot_arg);
>> +
>> +/* external Device Tree blob is invalid - use embedded one */
>> +use_embedded_dtb = !machine_desc;
>> +}
>> +
>> +if (uboot_tag == UBOOT_REV0P_TAG_CMDLINE)
>> +append_boot_cmdline = true;
>> #endif
>> -{
>> -/* No, so try the embedded one */
>> +
>> +if (use_embedded_dtb) {
>> machine_desc = setup_machine_fdt(__dtb_start);
>> if (!machine_desc)
>> panic("Embedded DT invalid\n");
>> +}
>>
>> -/*
>> - * If we are here, it is established that @uboot_arg didn't
>> - * point to DT blob. Instead if u-boot says it is cmdline,
>> - * append to embedded DT cmdline.
>> - * setup_machine_fdt() would have populated @boot_command_line
>> - */
>> -if (uboot_tag == 1) {
>> -/* Ensure a whitespace between the 2 cmdlines */
>> -strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
>> -strlcat(boot_command_line, uboot_arg,
>> -COMMAND_LINE_SIZE);
>> -}
>> +/*
>> + * If we are here, U-boot says that @uboot_arg is cmdline, so append it
>> + * to embedded DT cmdline.
>> + */
>> +if (append_boot_cmdline) {
>> +/* Ensure a whitespace between the 2 cmdlines */
>> +strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
>> +strlcat(boot_command_line, uboot_arg, COMMAND_LINE_SIZE);
>> }
>> +}
>> +
>> +void __init setup_arch(char **cmdline_p)
>> +{
>> +handle_uboot_args();
>>
>> /* Save unparsed command line copy for /proc/cmdline */
>> *cmdline_p = boot_command_line;
>
> I think we can grossly simplify all of this w/o adding any new ABI contract
> between kernel and uboot and eliminate CONFIG_ARC_UBOOT_SUPPORT as
Re: [PATCH 1/2] dma-mapping: add a kconfig symbol for arch_setup_dma_ops availability
Hi Christoph, On Mon, Feb 04, 2019 at 09:14:19AM +0100, Christoph Hellwig wrote: > Signed-off-by: Christoph Hellwig > --- > arch/arc/Kconfig | 1 + > arch/arc/include/asm/Kbuild | 1 + > arch/arc/include/asm/dma-mapping.h | 13 - > arch/arm/Kconfig | 1 + > arch/arm/include/asm/dma-mapping.h | 4 > arch/arm64/Kconfig | 1 + > arch/arm64/include/asm/dma-mapping.h | 4 > arch/mips/Kconfig| 1 + > arch/mips/include/asm/dma-mapping.h | 10 -- > arch/mips/mm/dma-noncoherent.c | 8 Acked-by: Paul Burton # MIPS Thanks, Paul ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
Re: [PATCH 06/12] dma-mapping: improve selection of dma_declare_coherent availability
Hi Christoph, On Mon, Feb 11, 2019 at 02:35:48PM +0100, Christoph Hellwig wrote: > This API is primarily used through DT entries, but two architectures > and two drivers call it directly. So instead of selecting the config > symbol for random architectures pull it in implicitly for the actual > users. Also rename the Kconfig option to describe the feature better. > > Signed-off-by: Christoph Hellwig Acked-by: Paul Burton # MIPS Thanks, Paul ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
Re: [PATCH 02/12] device.h: dma_mem is only needed for HAVE_GENERIC_DMA_COHERENT
On Mon, Feb 11, 2019 at 02:35:44PM +0100, Christoph Hellwig wrote: > No need to carry an unused field around. > > Signed-off-by: Christoph Hellwig > --- > include/linux/device.h | 2 ++ > 1 file changed, 2 insertions(+) Reviewed-by: Greg Kroah-Hartman ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
Re: [PATCH 09/12] dma-mapping: remove the DMA_MEMORY_EXCLUSIVE flag
On Mon, Feb 11, 2019 at 02:35:51PM +0100, Christoph Hellwig wrote: > All users of dma_declare_coherent want their allocations to be > exclusive, so default to exclusive allocations. > > Signed-off-by: Christoph Hellwig > --- > Documentation/DMA-API.txt | 9 +-- > arch/arm/mach-imx/mach-imx27_visstrim_m10.c | 12 +++-- > arch/arm/mach-imx/mach-mx31moboard.c | 3 +-- > arch/sh/boards/mach-ap325rxa/setup.c | 5 ++-- > arch/sh/boards/mach-ecovec24/setup.c | 6 ++--- > arch/sh/boards/mach-kfr2r09/setup.c | 5 ++-- > arch/sh/boards/mach-migor/setup.c | 5 ++-- > arch/sh/boards/mach-se/7724/setup.c | 6 ++--- > arch/sh/drivers/pci/fixups-dreamcast.c| 3 +-- > .../soc_camera/sh_mobile_ceu_camera.c | 3 +-- > drivers/usb/host/ohci-sm501.c | 3 +-- > drivers/usb/host/ohci-tmio.c | 2 +- > include/linux/dma-mapping.h | 7 ++ > kernel/dma/coherent.c | 25 ++- > 14 files changed, 29 insertions(+), 65 deletions(-) Reviewed-by: Greg Kroah-Hartman ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
Re: [PATCH 06/12] dma-mapping: improve selection of dma_declare_coherent availability
On Mon, Feb 11, 2019 at 02:35:48PM +0100, Christoph Hellwig wrote: > This API is primarily used through DT entries, but two architectures > and two drivers call it directly. So instead of selecting the config > symbol for random architectures pull it in implicitly for the actual > users. Also rename the Kconfig option to describe the feature better. > > Signed-off-by: Christoph Hellwig Reviewed-by: Greg Kroah-Hartman ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
Re: [PATCH 07/12] dma-mapping: move CONFIG_DMA_CMA to kernel/dma/Kconfig
On Mon, Feb 11, 2019 at 02:35:49PM +0100, Christoph Hellwig wrote: > This is where all the related code already lives. > > Signed-off-by: Christoph Hellwig > --- > drivers/base/Kconfig | 77 > kernel/dma/Kconfig | 77 > 2 files changed, 77 insertions(+), 77 deletions(-) Much nicer, thanks! Reviewed-by: Greg Kroah-Hartman ___ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc
