From 5237e95f63761477b7ea45499d08b89383a77eab Mon Sep 17 00:00:00 2001 From: Robin Murphy Date: Mon, 24 Jul 2017 18:29:27 +0100 Subject: dma-mapping: reduce dma_mapping_error inline bloat Thanks to the nested inlining, all drivers correctly calling dma_mapping_error() after a mapping a page or single buffer generate two calls to get_arch_dma_ops() per callsite, which all adds up to a fair old chunk of useless code, e.g. ~3KB for an arm64 defconfig plus extras: text data bss dec hex filename 13051391 1503898 327768 14883057 e318f1 vmlinux.o.old 13050751 1503898 327768 14882417 e31671 vmlinux.o.new Give the compiler a hand by making it clear we want the same ops. Signed-off-by: Robin Murphy Reviewed-by: Marek Szyprowski Signed-off-by: Christoph Hellwig --- include/linux/dma-mapping.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 03c0196a6f24..66d8ea68f40b 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -565,10 +565,11 @@ static inline void dma_free_noncoherent(struct device *dev, size_t size, static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) { - debug_dma_mapping_error(dev, dma_addr); + const struct dma_map_ops *ops = get_dma_ops(dev); - if (get_dma_ops(dev)->mapping_error) - return get_dma_ops(dev)->mapping_error(dev, dma_addr); + debug_dma_mapping_error(dev, dma_addr); + if (ops->mapping_error) + return ops->mapping_error(dev, dma_addr); return 0; } -- cgit v1.2.3 From 2fd523c57e520899e05ec663d04743005bcef5b2 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 25 Aug 2017 17:06:13 +0200 Subject: dma-mapping: remove dma_alloc_noncoherent and dma_free_noncoherent No users left, everyone switched to the _attrs versions. Signed-off-by: Christoph Hellwig --- Documentation/DMA-API.txt | 30 ++++++++++++++++-------------- arch/metag/include/asm/dma-mapping.h | 2 +- arch/nios2/include/asm/dma-mapping.h | 2 +- arch/tile/include/asm/dma-mapping.h | 4 ++-- include/linux/dma-mapping.h | 14 -------------- 5 files changed, 20 insertions(+), 32 deletions(-) (limited to 'include') diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt index 45b29326d719..ef3a04fcad65 100644 --- a/Documentation/DMA-API.txt +++ b/Documentation/DMA-API.txt @@ -515,14 +515,15 @@ API at all. :: void * - dma_alloc_noncoherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag) + dma_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle, + gfp_t flag, unsigned long attrs) -Identical to dma_alloc_coherent() except that the platform will -choose to return either consistent or non-consistent memory as it sees -fit. By using this API, you are guaranteeing to the platform that you -have all the correct and necessary sync points for this memory in the -driver should it choose to return non-consistent memory. +Identical to dma_alloc_coherent() except that when the +DMA_ATTR_NON_CONSISTENT flags is passed in the attrs argument, the +platform will choose to return either consistent or non-consistent memory +as it sees fit. By using this API, you are guaranteeing to the platform +that you have all the correct and necessary sync points for this memory +in the driver should it choose to return non-consistent memory. Note: where the platform can return consistent memory, it will guarantee that the sync points become nops. @@ -535,12 +536,13 @@ that simply cannot make consistent memory. :: void - dma_free_noncoherent(struct device *dev, size_t size, void *cpu_addr, - dma_addr_t dma_handle) + dma_free_attrs(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t dma_handle, unsigned long attrs) -Free memory allocated by the nonconsistent API. All parameters must -be identical to those passed in (and returned by -dma_alloc_noncoherent()). +Free memory allocated by the dma_alloc_attrs(). All parameters common +parameters must identical to those otherwise passed to dma_fre_coherent, +and the attrs argument must be identical to the attrs passed to +dma_alloc_attrs(). :: @@ -564,8 +566,8 @@ memory or doing partial flushes. dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction direction) -Do a partial sync of memory that was allocated by -dma_alloc_noncoherent(), starting at virtual address vaddr and +Do a partial sync of memory that was allocated by dma_alloc_attrs() with +the DMA_ATTR_NON_CONSISTENT flag starting at virtual address vaddr and continuing on for size. Again, you *must* observe the cache line boundaries when doing this. diff --git a/arch/metag/include/asm/dma-mapping.h b/arch/metag/include/asm/dma-mapping.h index fad3dc3cb210..ea573be2b6d0 100644 --- a/arch/metag/include/asm/dma-mapping.h +++ b/arch/metag/include/asm/dma-mapping.h @@ -9,7 +9,7 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) } /* - * dma_alloc_noncoherent() returns non-cacheable memory, so there's no need to + * dma_alloc_attrs() always returns non-cacheable memory, so there's no need to * do any flushing here. */ static inline void diff --git a/arch/nios2/include/asm/dma-mapping.h b/arch/nios2/include/asm/dma-mapping.h index 7b3c6f280293..f8dc62222741 100644 --- a/arch/nios2/include/asm/dma-mapping.h +++ b/arch/nios2/include/asm/dma-mapping.h @@ -18,7 +18,7 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) } /* - * dma_alloc_noncoherent() returns non-cacheable memory, so there's no need to + * dma_alloc_attrs() always returns non-cacheable memory, so there's no need to * do any flushing here. */ static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, diff --git a/arch/tile/include/asm/dma-mapping.h b/arch/tile/include/asm/dma-mapping.h index bbc71a29b2c6..7061dc8af43a 100644 --- a/arch/tile/include/asm/dma-mapping.h +++ b/arch/tile/include/asm/dma-mapping.h @@ -68,8 +68,8 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) int dma_set_mask(struct device *dev, u64 mask); /* - * dma_alloc_noncoherent() is #defined to return coherent memory, - * so there's no need to do any flushing here. + * dma_alloc_attrs() always returns non-cacheable memory, so there's no need to + * do any flushing here. */ static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction direction) diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 66d8ea68f40b..4c98cc96971f 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -549,20 +549,6 @@ static inline void dma_free_coherent(struct device *dev, size_t size, return dma_free_attrs(dev, size, cpu_addr, dma_handle, 0); } -static inline void *dma_alloc_noncoherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp) -{ - return dma_alloc_attrs(dev, size, dma_handle, gfp, - DMA_ATTR_NON_CONSISTENT); -} - -static inline void dma_free_noncoherent(struct device *dev, size_t size, - void *cpu_addr, dma_addr_t dma_handle) -{ - dma_free_attrs(dev, size, cpu_addr, dma_handle, - DMA_ATTR_NON_CONSISTENT); -} - static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) { const struct dma_map_ops *ops = get_dma_ops(dev); -- cgit v1.2.3 From b32dbc1e0bf0eaa8bdd725491b361d5fc2f57a85 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 25 Aug 2017 17:12:18 +0200 Subject: dma-coherent: remove the DMA_MEMORY_INCLUDES_CHILDREN flag This flag was never implemented or used. Signed-off-by: Christoph Hellwig Reviewed-by: Robin Murphy --- Documentation/DMA-API.txt | 4 ---- drivers/base/dma-coherent.c | 2 -- drivers/char/virtio_console.c | 3 --- include/linux/dma-mapping.h | 3 +-- 4 files changed, 1 insertion(+), 11 deletions(-) (limited to 'include') diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt index ef3a04fcad65..dddf52e768d6 100644 --- a/Documentation/DMA-API.txt +++ b/Documentation/DMA-API.txt @@ -600,10 +600,6 @@ flags can be ORed together and are: One or both of these flags must be present. -- DMA_MEMORY_INCLUDES_CHILDREN - make the declared memory be allocated by - dma_alloc_coherent of any child devices of this one (for memory residing - on a bridge). - - 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. diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c index 1c152aed6b82..6f6dc4d41788 100644 --- a/drivers/base/dma-coherent.c +++ b/drivers/base/dma-coherent.c @@ -109,8 +109,6 @@ static int dma_assign_coherent_memory(struct device *dev, return -EBUSY; dev->dma_mem = mem; - /* FIXME: this routine just ignores DMA_MEMORY_INCLUDES_CHILDREN */ - return 0; } diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index ad843eb02ae7..48e86ce9fac8 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -451,9 +451,6 @@ static struct port_buffer *alloc_buf(struct virtqueue *vq, size_t buf_size, * device is created by remoteproc, the DMA memory is * associated with the grandparent device: * vdev => rproc => platform-dev. - * The code here would have been less quirky if - * DMA_MEMORY_INCLUDES_CHILDREN had been supported - * in dma-coherent.c */ if (!vq->vdev->dev.parent || !vq->vdev->dev.parent->parent) goto free_buf; diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 4c98cc96971f..abf369b11f54 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -696,8 +696,7 @@ static inline int dma_get_cache_alignment(void) /* flags for the coherent memory api */ #define DMA_MEMORY_MAP 0x01 #define DMA_MEMORY_IO 0x02 -#define DMA_MEMORY_INCLUDES_CHILDREN 0x04 -#define DMA_MEMORY_EXCLUSIVE 0x08 +#define DMA_MEMORY_EXCLUSIVE 0x04 #ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, -- cgit v1.2.3 From 2436bdcda53ff4abb7897c87fa29ef3de8055344 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 25 Aug 2017 17:13:09 +0200 Subject: dma-coherent: remove the DMA_MEMORY_MAP and DMA_MEMORY_IO flags DMA_MEMORY_IO was never used in the tree, so remove it. That means there is no need for the DMA_MEMORY_MAP flag either now, so remove it as well and change dma_declare_coherent_memory to return a normal errno value. Signed-off-by: Christoph Hellwig Reviewed-by: Marek Szyprowski --- Documentation/DMA-API.txt | 21 +--------- arch/arm/mach-imx/mach-imx27_visstrim_m10.c | 44 ++++++++------------- arch/arm/mach-imx/mach-mx31moboard.c | 12 +++--- arch/sh/drivers/pci/fixups-dreamcast.c | 3 +- drivers/base/dma-coherent.c | 46 +++++++--------------- drivers/base/dma-mapping.c | 7 +--- .../platform/soc_camera/sh_mobile_ceu_camera.c | 5 +-- drivers/scsi/NCR_Q720.c | 3 +- drivers/usb/host/ohci-sm501.c | 7 ++-- drivers/usb/host/ohci-tmio.c | 9 ++--- include/linux/dma-mapping.h | 6 +-- 11 files changed, 52 insertions(+), 111 deletions(-) (limited to 'include') diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt index dddf52e768d6..ac66ae2509a9 100644 --- a/Documentation/DMA-API.txt +++ b/Documentation/DMA-API.txt @@ -592,30 +592,11 @@ size is the size of the area (must be multiples of PAGE_SIZE). flags can be ORed together and are: -- DMA_MEMORY_MAP - request that the memory returned from - dma_alloc_coherent() be directly writable. - -- DMA_MEMORY_IO - request that the memory returned from - dma_alloc_coherent() be addressable using read()/write()/memcpy_toio() etc. - -One or both of these flags must be present. - - 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. -The return value will be either DMA_MEMORY_MAP or DMA_MEMORY_IO and -must correspond to a passed in flag (i.e. no returning DMA_MEMORY_IO -if only DMA_MEMORY_MAP were passed in) for success or zero for -failure. - -Note, for DMA_MEMORY_IO returns, all subsequent memory returned by -dma_alloc_coherent() may no longer be accessed directly, but instead -must be accessed using the correct bus functions. If your driver -isn't prepared to handle this contingency, it should not specify -DMA_MEMORY_IO in the input flags. - -As a simplification for the platforms, only **one** such region of +As a simplification for the platforms, only *one* such region of memory may be declared per device. For reasons of efficiency, most platforms choose to track the declared diff --git a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c index dd75a4756761..5169dfba9718 100644 --- a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c +++ b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c @@ -245,7 +245,6 @@ static phys_addr_t mx2_camera_base __initdata; static void __init visstrim_analog_camera_init(void) { struct platform_device *pdev; - int dma; gpio_set_value(TVP5150_PWDN, 1); ndelay(1); @@ -258,12 +257,9 @@ static void __init visstrim_analog_camera_init(void) if (IS_ERR(pdev)) return; - dma = dma_declare_coherent_memory(&pdev->dev, - mx2_camera_base, mx2_camera_base, - MX2_CAMERA_BUF_SIZE, - DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE); - if (!(dma & DMA_MEMORY_MAP)) - return; + dma_declare_coherent_memory(&pdev->dev, mx2_camera_base, + mx2_camera_base, MX2_CAMERA_BUF_SIZE, + DMA_MEMORY_EXCLUSIVE); } static void __init visstrim_reserve(void) @@ -444,16 +440,13 @@ static const struct imx_ssi_platform_data visstrim_m10_ssi_pdata __initconst = { static void __init visstrim_coda_init(void) { struct platform_device *pdev; - int dma; pdev = imx27_add_coda(); - dma = 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_MAP | DMA_MEMORY_EXCLUSIVE); - if (!(dma & DMA_MEMORY_MAP)) - return; + 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); } /* DMA deinterlace */ @@ -466,24 +459,21 @@ static void __init visstrim_deinterlace_init(void) { int ret = -ENOMEM; struct platform_device *pdev = &visstrim_deinterlace; - int dma; ret = platform_device_register(pdev); - dma = 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_MAP | DMA_MEMORY_EXCLUSIVE); - if (!(dma & DMA_MEMORY_MAP)) - return; + 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); } /* Emma-PrP for format conversion */ static void __init visstrim_emmaprp_init(void) { struct platform_device *pdev; - int dma; + int ret; pdev = imx27_add_mx2_emmaprp(); if (IS_ERR(pdev)) @@ -493,11 +483,11 @@ static void __init visstrim_emmaprp_init(void) * Use the same memory area as the analog camera since both * devices are, by nature, exclusive. */ - dma = dma_declare_coherent_memory(&pdev->dev, + ret = dma_declare_coherent_memory(&pdev->dev, mx2_camera_base, mx2_camera_base, MX2_CAMERA_BUF_SIZE, - DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE); - if (!(dma & DMA_MEMORY_MAP)) + DMA_MEMORY_EXCLUSIVE); + 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 bde9a9af6714..3cd030960c98 100644 --- a/arch/arm/mach-imx/mach-mx31moboard.c +++ b/arch/arm/mach-imx/mach-mx31moboard.c @@ -475,7 +475,7 @@ static phys_addr_t mx3_camera_base __initdata; static int __init mx31moboard_init_cam(void) { - int dma, ret = -ENOMEM; + int dma, ret; struct platform_device *pdev; imx31_add_ipu_core(); @@ -484,11 +484,11 @@ static int __init mx31moboard_init_cam(void) if (IS_ERR(pdev)) return PTR_ERR(pdev); - dma = dma_declare_coherent_memory(&pdev->dev, - mx3_camera_base, mx3_camera_base, - MX3_CAMERA_BUF_SIZE, - DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE); - if (!(dma & DMA_MEMORY_MAP)) + ret = dma_declare_coherent_memory(&pdev->dev, + mx3_camera_base, mx3_camera_base, + MX3_CAMERA_BUF_SIZE, + DMA_MEMORY_EXCLUSIVE); + if (ret) goto err; ret = platform_device_add(pdev); diff --git a/arch/sh/drivers/pci/fixups-dreamcast.c b/arch/sh/drivers/pci/fixups-dreamcast.c index 1d1c5a227e50..c931d5872ffe 100644 --- a/arch/sh/drivers/pci/fixups-dreamcast.c +++ b/arch/sh/drivers/pci/fixups-dreamcast.c @@ -63,11 +63,10 @@ static void gapspci_fixup_resources(struct pci_dev *dev) res.end = GAPSPCI_DMA_BASE + GAPSPCI_DMA_SIZE - 1; res.flags = IORESOURCE_MEM; pcibios_resource_to_bus(dev->bus, ®ion, &res); - BUG_ON(!dma_declare_coherent_memory(&dev->dev, + BUG_ON(dma_declare_coherent_memory(&dev->dev, res.start, region.start, resource_size(&res), - DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE)); break; default: diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c index 6f6dc4d41788..b275eeb739f1 100644 --- a/drivers/base/dma-coherent.c +++ b/drivers/base/dma-coherent.c @@ -46,15 +46,10 @@ static bool dma_init_coherent_memory( int pages = size >> PAGE_SHIFT; int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long); - if ((flags & (DMA_MEMORY_MAP | DMA_MEMORY_IO)) == 0) - goto out; if (!size) goto out; - if (flags & DMA_MEMORY_MAP) - mem_base = memremap(phys_addr, size, MEMREMAP_WC); - else - mem_base = ioremap(phys_addr, size); + mem_base = memremap(phys_addr, size, MEMREMAP_WC); if (!mem_base) goto out; @@ -77,12 +72,8 @@ static bool dma_init_coherent_memory( out: kfree(dma_mem); - if (mem_base) { - if (flags & DMA_MEMORY_MAP) - memunmap(mem_base); - else - iounmap(mem_base); - } + if (mem_base) + memunmap(mem_base); return false; } @@ -91,10 +82,7 @@ static void dma_release_coherent_memory(struct dma_coherent_mem *mem) if (!mem) return; - if (mem->flags & DMA_MEMORY_MAP) - memunmap(mem->virt_base); - else - iounmap(mem->virt_base); + memunmap(mem->virt_base); kfree(mem->bitmap); kfree(mem); } @@ -116,16 +104,16 @@ int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, dma_addr_t device_addr, size_t size, int flags) { struct dma_coherent_mem *mem; + int ret; - if (!dma_init_coherent_memory(phys_addr, device_addr, size, flags, - &mem)) - return 0; - - if (dma_assign_coherent_memory(dev, mem) == 0) - return flags & DMA_MEMORY_MAP ? DMA_MEMORY_MAP : DMA_MEMORY_IO; + ret = dma_init_coherent_memory(phys_addr, device_addr, size, flags, &mem); + if (ret) + return ret; - dma_release_coherent_memory(mem); - return 0; + ret = dma_assign_coherent_memory(dev, mem); + if (ret) + dma_release_coherent_memory(mem); + return ret; } EXPORT_SYMBOL(dma_declare_coherent_memory); @@ -186,15 +174,9 @@ static void *__dma_alloc_from_coherent(struct dma_coherent_mem *mem, */ *dma_handle = mem->device_base + (pageno << PAGE_SHIFT); ret = mem->virt_base + (pageno << PAGE_SHIFT); - dma_memory_map = (mem->flags & DMA_MEMORY_MAP); spin_unlock_irqrestore(&mem->spinlock, flags); - if (dma_memory_map) - memset(ret, 0, size); - else - memset_io(ret, 0, size); - + memset(ret, 0, size); return ret; - err: spin_unlock_irqrestore(&mem->spinlock, flags); return NULL; @@ -360,7 +342,7 @@ static int rmem_dma_device_init(struct reserved_mem *rmem, struct device *dev) if (!mem && !dma_init_coherent_memory(rmem->base, rmem->base, rmem->size, - DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE, + DMA_MEMORY_EXCLUSIVE, &mem)) { pr_err("Reserved memory: failed to init DMA memory pool at %pa, size %ld MiB\n", &rmem->base, (unsigned long)rmem->size / SZ_1M); diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c index b555ff9dd8fc..e584eddef0a7 100644 --- a/drivers/base/dma-mapping.c +++ b/drivers/base/dma-mapping.c @@ -176,13 +176,10 @@ int dmam_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, rc = dma_declare_coherent_memory(dev, phys_addr, device_addr, size, flags); - if (rc) { + if (!rc) devres_add(dev, res); - rc = 0; - } else { + else devres_free(res); - rc = -ENOMEM; - } return rc; } diff --git a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c index 96dc01750bc0..36762ec954e7 100644 --- a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c +++ b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c @@ -1708,11 +1708,10 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev) err = dma_declare_coherent_memory(&pdev->dev, res->start, res->start, resource_size(res), - DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE); - if (!err) { + if (err) { dev_err(&pdev->dev, "Unable to declare CEU memory.\n"); - return -ENXIO; + return err; } pcdev->video_limit = resource_size(res); diff --git a/drivers/scsi/NCR_Q720.c b/drivers/scsi/NCR_Q720.c index 05835bf1bf9c..54e7d26908ee 100644 --- a/drivers/scsi/NCR_Q720.c +++ b/drivers/scsi/NCR_Q720.c @@ -217,8 +217,7 @@ NCR_Q720_probe(struct device *dev) } if (dma_declare_coherent_memory(dev, base_addr, base_addr, - mem_size, DMA_MEMORY_MAP) - != DMA_MEMORY_MAP) { + mem_size, 0)) { printk(KERN_ERR "NCR_Q720: DMA declare memory failed\n"); goto out_release_region; } diff --git a/drivers/usb/host/ohci-sm501.c b/drivers/usb/host/ohci-sm501.c index a8b8d8b8d9f3..d4e0f7cd96fa 100644 --- a/drivers/usb/host/ohci-sm501.c +++ b/drivers/usb/host/ohci-sm501.c @@ -123,13 +123,12 @@ static int ohci_hcd_sm501_drv_probe(struct platform_device *pdev) * regular memory. The HCD_LOCAL_MEM flag does just that. */ - if (!dma_declare_coherent_memory(dev, mem->start, + retval = dma_declare_coherent_memory(dev, mem->start, mem->start - mem->parent->start, resource_size(mem), - DMA_MEMORY_MAP | - DMA_MEMORY_EXCLUSIVE)) { + DMA_MEMORY_EXCLUSIVE); + if (retval) { dev_err(dev, "cannot declare coherent memory\n"); - retval = -ENXIO; goto err1; } diff --git a/drivers/usb/host/ohci-tmio.c b/drivers/usb/host/ohci-tmio.c index cfcfadfc94fc..16d081a093bb 100644 --- a/drivers/usb/host/ohci-tmio.c +++ b/drivers/usb/host/ohci-tmio.c @@ -227,13 +227,10 @@ static int ohci_hcd_tmio_drv_probe(struct platform_device *dev) goto err_ioremap_regs; } - if (!dma_declare_coherent_memory(&dev->dev, sram->start, - sram->start, - resource_size(sram), - DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE)) { - ret = -EBUSY; + ret = dma_declare_coherent_memory(&dev->dev, sram->start, sram->start, + resource_size(sram), DMA_MEMORY_EXCLUSIVE); + if (ret) goto err_dma_declare; - } if (cell->enable) { ret = cell->enable(dev); diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index abf369b11f54..b7dd11c02a45 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -694,9 +694,7 @@ static inline int dma_get_cache_alignment(void) #endif /* flags for the coherent memory api */ -#define DMA_MEMORY_MAP 0x01 -#define DMA_MEMORY_IO 0x02 -#define DMA_MEMORY_EXCLUSIVE 0x04 +#define DMA_MEMORY_EXCLUSIVE 0x01 #ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, @@ -709,7 +707,7 @@ static inline int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, dma_addr_t device_addr, size_t size, int flags) { - return 0; + return -ENOSYS; } static inline void -- cgit v1.2.3