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raspberrypi-kernel
提交 2864697c 编写于 作者: B Benjamin Herrenschmidt
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Merge commit 'tip/iommu-for-powerpc' into next

上级 3c2ee2d9 c7084b35
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arch/ia64/include/asm/dma-mapping.h
浏览文件 @ 2864697c
...@@ -44,7 +44,6 @@ static inline void dma_free_coherent(struct device *dev, size_t size, ...@@ -44,7 +44,6 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
#define get_dma_ops(dev) platform_dma_get_ops(dev) #define get_dma_ops(dev) platform_dma_get_ops(dev)
#define flush_write_buffers()
#include <asm-generic/dma-mapping-common.h> #include <asm-generic/dma-mapping-common.h>
...@@ -69,6 +68,24 @@ dma_set_mask (struct device *dev, u64 mask) ...@@ -69,6 +68,24 @@ dma_set_mask (struct device *dev, u64 mask)
return 0; return 0;
} }
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
if (!dev->dma_mask)
return 0;
return addr + size <= *dev->dma_mask;
}
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
return paddr;
}
static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
{
return daddr;
}
extern int dma_get_cache_alignment(void); extern int dma_get_cache_alignment(void);
static inline void static inline void
......
arch/powerpc/include/asm/dma-mapping.h
浏览文件 @ 2864697c
...@@ -424,6 +424,29 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) ...@@ -424,6 +424,29 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
#endif #endif
} }
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
struct dma_mapping_ops *ops = get_dma_ops(dev);
if (ops->addr_needs_map && ops->addr_needs_map(dev, addr, size))
return 0;
if (!dev->dma_mask)
return 0;
return addr + size <= *dev->dma_mask;
}
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
return paddr + get_dma_direct_offset(dev);
}
static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
{
return daddr - get_dma_direct_offset(dev);
}
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
#ifdef CONFIG_NOT_COHERENT_CACHE #ifdef CONFIG_NOT_COHERENT_CACHE
......
arch/powerpc/kernel/dma-swiotlb.c
浏览文件 @ 2864697c
...@@ -24,50 +24,12 @@ ...@@ -24,50 +24,12 @@
int swiotlb __read_mostly; int swiotlb __read_mostly;
unsigned int ppc_swiotlb_enable; unsigned int ppc_swiotlb_enable;
void *swiotlb_bus_to_virt(struct device *hwdev, dma_addr_t addr)
{
unsigned long pfn = PFN_DOWN(swiotlb_bus_to_phys(hwdev, addr));
void *pageaddr = page_address(pfn_to_page(pfn));
if (pageaddr != NULL)
return pageaddr + (addr % PAGE_SIZE);
return NULL;
}
dma_addr_t swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
{
return paddr + get_dma_direct_offset(hwdev);
}
phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
{
return baddr - get_dma_direct_offset(hwdev);
}
/*
* Determine if an address needs bounce buffering via swiotlb.
* Going forward I expect the swiotlb code to generalize on using
* a dma_ops->addr_needs_map, and this function will move from here to the
* generic swiotlb code.
*/
int
swiotlb_arch_address_needs_mapping(struct device *hwdev, dma_addr_t addr,
size_t size)
{
struct dma_mapping_ops *dma_ops = get_dma_ops(hwdev);
BUG_ON(!dma_ops);
return dma_ops->addr_needs_map(hwdev, addr, size);
}
/* /*
* Determine if an address is reachable by a pci device, or if we must bounce. * Determine if an address is reachable by a pci device, or if we must bounce.
*/ */
static int static int
swiotlb_pci_addr_needs_map(struct device *hwdev, dma_addr_t addr, size_t size) swiotlb_pci_addr_needs_map(struct device *hwdev, dma_addr_t addr, size_t size)
{ {
u64 mask = dma_get_mask(hwdev);
dma_addr_t max; dma_addr_t max;
struct pci_controller *hose; struct pci_controller *hose;
struct pci_dev *pdev = to_pci_dev(hwdev); struct pci_dev *pdev = to_pci_dev(hwdev);
...@@ -79,16 +41,9 @@ swiotlb_pci_addr_needs_map(struct device *hwdev, dma_addr_t addr, size_t size) ...@@ -79,16 +41,9 @@ swiotlb_pci_addr_needs_map(struct device *hwdev, dma_addr_t addr, size_t size)
if ((addr + size > max) | (addr < hose->dma_window_base_cur)) if ((addr + size > max) | (addr < hose->dma_window_base_cur))
return 1; return 1;
return !is_buffer_dma_capable(mask, addr, size); return 0;
}
static int
swiotlb_addr_needs_map(struct device *hwdev, dma_addr_t addr, size_t size)
{
return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
} }
/* /*
* At the moment, all platforms that use this code only require * At the moment, all platforms that use this code only require
* swiotlb to be used if we're operating on HIGHMEM. Since * swiotlb to be used if we're operating on HIGHMEM. Since
...@@ -104,7 +59,6 @@ struct dma_mapping_ops swiotlb_dma_ops = { ...@@ -104,7 +59,6 @@ struct dma_mapping_ops swiotlb_dma_ops = {
.dma_supported = swiotlb_dma_supported, .dma_supported = swiotlb_dma_supported,
.map_page = swiotlb_map_page, .map_page = swiotlb_map_page,
.unmap_page = swiotlb_unmap_page, .unmap_page = swiotlb_unmap_page,
.addr_needs_map = swiotlb_addr_needs_map,
.sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu, .sync_single_range_for_cpu = swiotlb_sync_single_range_for_cpu,
.sync_single_range_for_device = swiotlb_sync_single_range_for_device, .sync_single_range_for_device = swiotlb_sync_single_range_for_device,
.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu, .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
......
arch/sparc/Kconfig
浏览文件 @ 2864697c
...@@ -25,6 +25,8 @@ config SPARC ...@@ -25,6 +25,8 @@ config SPARC
select ARCH_WANT_OPTIONAL_GPIOLIB select ARCH_WANT_OPTIONAL_GPIOLIB
select RTC_CLASS select RTC_CLASS
select RTC_DRV_M48T59 select RTC_DRV_M48T59
select HAVE_DMA_ATTRS
select HAVE_DMA_API_DEBUG
config SPARC32 config SPARC32
def_bool !64BIT def_bool !64BIT
......
arch/sparc/include/asm/dma-mapping.h
浏览文件 @ 2864697c
...@@ -3,6 +3,7 @@ ...@@ -3,6 +3,7 @@
#include <linux/scatterlist.h> #include <linux/scatterlist.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/dma-debug.h>
#define DMA_ERROR_CODE (~(dma_addr_t)0x0) #define DMA_ERROR_CODE (~(dma_addr_t)0x0)
...@@ -13,142 +14,40 @@ extern int dma_set_mask(struct device *dev, u64 dma_mask); ...@@ -13,142 +14,40 @@ extern int dma_set_mask(struct device *dev, u64 dma_mask);
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
#define dma_is_consistent(d, h) (1) #define dma_is_consistent(d, h) (1)
struct dma_ops { extern struct dma_map_ops *dma_ops, pci32_dma_ops;
void *(*alloc_coherent)(struct device *dev, size_t size, extern struct bus_type pci_bus_type;
dma_addr_t *dma_handle, gfp_t flag);
void (*free_coherent)(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_handle);
dma_addr_t (*map_page)(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction direction);
void (*unmap_page)(struct device *dev, dma_addr_t dma_addr,
size_t size,
enum dma_data_direction direction);
int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction direction);
void (*unmap_sg)(struct device *dev, struct scatterlist *sg,
int nhwentries,
enum dma_data_direction direction);
void (*sync_single_for_cpu)(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction);
void (*sync_single_for_device)(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction);
void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg,
int nelems,
enum dma_data_direction direction);
void (*sync_sg_for_device)(struct device *dev,
struct scatterlist *sg, int nents,
enum dma_data_direction dir);
};
extern const struct dma_ops *dma_ops;
static inline void *dma_alloc_coherent(struct device *dev, size_t size, static inline struct dma_map_ops *get_dma_ops(struct device *dev)
dma_addr_t *dma_handle, gfp_t flag)
{
return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
}
static inline void dma_free_coherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_handle)
{
dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
}
static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
size_t size,
enum dma_data_direction direction)
{
return dma_ops->map_page(dev, virt_to_page(cpu_addr),
(unsigned long)cpu_addr & ~PAGE_MASK, size,
direction);
}
static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
size_t size,
enum dma_data_direction direction)
{
dma_ops->unmap_page(dev, dma_addr, size, direction);
}
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
return dma_ops->map_page(dev, page, offset, size, direction);
}
static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
size_t size,
enum dma_data_direction direction)
{
dma_ops->unmap_page(dev, dma_address, size, direction);
}
static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction direction)
{
return dma_ops->map_sg(dev, sg, nents, direction);
}
static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction direction)
{ {
dma_ops->unmap_sg(dev, sg, nents, direction); #if defined(CONFIG_SPARC32) && defined(CONFIG_PCI)
} if (dev->bus == &pci_bus_type)
return &pci32_dma_ops;
static inline void dma_sync_single_for_cpu(struct device *dev, #endif
dma_addr_t dma_handle, size_t size, return dma_ops;
enum dma_data_direction direction)
{
dma_ops->sync_single_for_cpu(dev, dma_handle, size, direction);
} }
static inline void dma_sync_single_for_device(struct device *dev, #include <asm-generic/dma-mapping-common.h>
dma_addr_t dma_handle,
size_t size,
enum dma_data_direction direction)
{
if (dma_ops->sync_single_for_device)
dma_ops->sync_single_for_device(dev, dma_handle, size,
direction);
}
static inline void dma_sync_sg_for_cpu(struct device *dev, static inline void *dma_alloc_coherent(struct device *dev, size_t size,
struct scatterlist *sg, int nelems, dma_addr_t *dma_handle, gfp_t flag)
enum dma_data_direction direction)
{ {
dma_ops->sync_sg_for_cpu(dev, sg, nelems, direction); struct dma_map_ops *ops = get_dma_ops(dev);
} void *cpu_addr;
static inline void dma_sync_sg_for_device(struct device *dev, cpu_addr = ops->alloc_coherent(dev, size, dma_handle, flag);
struct scatterlist *sg, int nelems, debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
enum dma_data_direction direction) return cpu_addr;
{
if (dma_ops->sync_sg_for_device)
dma_ops->sync_sg_for_device(dev, sg, nelems, direction);
} }
static inline void dma_sync_single_range_for_cpu(struct device *dev, static inline void dma_free_coherent(struct device *dev, size_t size,
dma_addr_t dma_handle, void *cpu_addr, dma_addr_t dma_handle)
unsigned long offset,
size_t size,
enum dma_data_direction dir)
{ {
dma_sync_single_for_cpu(dev, dma_handle+offset, size, dir); struct dma_map_ops *ops = get_dma_ops(dev);
}
static inline void dma_sync_single_range_for_device(struct device *dev, debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
dma_addr_t dma_handle, ops->free_coherent(dev, size, cpu_addr, dma_handle);
unsigned long offset,
size_t size,
enum dma_data_direction dir)
{
dma_sync_single_for_device(dev, dma_handle+offset, size, dir);
} }
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{ {
return (dma_addr == DMA_ERROR_CODE); return (dma_addr == DMA_ERROR_CODE);
......
arch/sparc/include/asm/pci.h
浏览文件 @ 2864697c
...@@ -5,4 +5,7 @@ ...@@ -5,4 +5,7 @@
#else #else
#include <asm/pci_32.h> #include <asm/pci_32.h>
#endif #endif
#include <asm-generic/pci-dma-compat.h>
#endif #endif
arch/sparc/include/asm/pci_32.h
浏览文件 @ 2864697c
...@@ -31,42 +31,8 @@ static inline void pcibios_penalize_isa_irq(int irq, int active) ...@@ -31,42 +31,8 @@ static inline void pcibios_penalize_isa_irq(int irq, int active)
*/ */
#define PCI_DMA_BUS_IS_PHYS (0) #define PCI_DMA_BUS_IS_PHYS (0)
#include <asm/scatterlist.h>
struct pci_dev; struct pci_dev;
/* Allocate and map kernel buffer using consistent mode DMA for a device.
* hwdev should be valid struct pci_dev pointer for PCI devices.
*/
extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *dma_handle);
/* Free and unmap a consistent DMA buffer.
* cpu_addr is what was returned from pci_alloc_consistent,
* size must be the same as what as passed into pci_alloc_consistent,
* and likewise dma_addr must be the same as what *dma_addrp was set to.
*
* References to the memory and mappings assosciated with cpu_addr/dma_addr
* past this call are illegal.
*/
extern void pci_free_consistent(struct pci_dev *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle);
/* Map a single buffer of the indicated size for DMA in streaming mode.
* The 32-bit bus address to use is returned.
*
* Once the device is given the dma address, the device owns this memory
* until either pci_unmap_single or pci_dma_sync_single_for_cpu is performed.
*/
extern dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction);
/* Unmap a single streaming mode DMA translation. The dma_addr and size
* must match what was provided for in a previous pci_map_single call. All
* other usages are undefined.
*
* After this call, reads by the cpu to the buffer are guaranteed to see
* whatever the device wrote there.
*/
extern void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, size_t size, int direction);
/* pci_unmap_{single,page} is not a nop, thus... */ /* pci_unmap_{single,page} is not a nop, thus... */
#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \ #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
dma_addr_t ADDR_NAME; dma_addr_t ADDR_NAME;
...@@ -81,69 +47,6 @@ extern void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, size_t ...@@ -81,69 +47,6 @@ extern void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, size_t
#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \ #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
(((PTR)->LEN_NAME) = (VAL)) (((PTR)->LEN_NAME) = (VAL))
/*
* Same as above, only with pages instead of mapped addresses.
*/
extern dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page,
unsigned long offset, size_t size, int direction);
extern void pci_unmap_page(struct pci_dev *hwdev,
dma_addr_t dma_address, size_t size, int direction);
/* Map a set of buffers described by scatterlist in streaming
* mode for DMA. This is the scather-gather version of the
* above pci_map_single interface. Here the scatter gather list
* elements are each tagged with the appropriate dma address
* and length. They are obtained via sg_dma_{address,length}(SG).
*
* NOTE: An implementation may be able to use a smaller number of
* DMA address/length pairs than there are SG table elements.
* (for example via virtual mapping capabilities)
* The routine returns the number of addr/length pairs actually
* used, at most nents.
*
* Device ownership issues as mentioned above for pci_map_single are
* the same here.
*/
extern int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction);
/* Unmap a set of streaming mode DMA translations.
* Again, cpu read rules concerning calls here are the same as for
* pci_unmap_single() above.
*/
extern void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nhwents, int direction);
/* Make physical memory consistent for a single
* streaming mode DMA translation after a transfer.
*
* If you perform a pci_map_single() but wish to interrogate the
* buffer using the cpu, yet do not wish to teardown the PCI dma
* mapping, you must call this function before doing so. At the
* next point you give the PCI dma address back to the card, you
* must first perform a pci_dma_sync_for_device, and then the device
* again owns the buffer.
*/
extern void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction);
extern void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction);
/* Make physical memory consistent for a set of streaming
* mode DMA translations after a transfer.
*
* The same as pci_dma_sync_single_* but for a scatter-gather list,
* same rules and usage.
*/
extern void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction);
extern void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction);
/* Return whether the given PCI device DMA address mask can
* be supported properly. For example, if your device can
* only drive the low 24-bits during PCI bus mastering, then
* you would pass 0x00ffffff as the mask to this function.
*/
static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask)
{
return 1;
}
#ifdef CONFIG_PCI #ifdef CONFIG_PCI
static inline void pci_dma_burst_advice(struct pci_dev *pdev, static inline void pci_dma_burst_advice(struct pci_dev *pdev,
enum pci_dma_burst_strategy *strat, enum pci_dma_burst_strategy *strat,
...@@ -154,14 +57,6 @@ static inline void pci_dma_burst_advice(struct pci_dev *pdev, ...@@ -154,14 +57,6 @@ static inline void pci_dma_burst_advice(struct pci_dev *pdev,
} }
#endif #endif
#define PCI_DMA_ERROR_CODE (~(dma_addr_t)0x0)
static inline int pci_dma_mapping_error(struct pci_dev *pdev,
dma_addr_t dma_addr)
{
return (dma_addr == PCI_DMA_ERROR_CODE);
}
struct device_node; struct device_node;
extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev); extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev);
......
arch/sparc/include/asm/pci_64.h
浏览文件 @ 2864697c
...@@ -35,37 +35,6 @@ static inline void pcibios_penalize_isa_irq(int irq, int active) ...@@ -35,37 +35,6 @@ static inline void pcibios_penalize_isa_irq(int irq, int active)
*/ */
#define PCI_DMA_BUS_IS_PHYS (0) #define PCI_DMA_BUS_IS_PHYS (0)
static inline void *pci_alloc_consistent(struct pci_dev *pdev, size_t size,
dma_addr_t *dma_handle)
{
return dma_alloc_coherent(&pdev->dev, size, dma_handle, GFP_ATOMIC);
}
static inline void pci_free_consistent(struct pci_dev *pdev, size_t size,
void *vaddr, dma_addr_t dma_handle)
{
return dma_free_coherent(&pdev->dev, size, vaddr, dma_handle);
}
static inline dma_addr_t pci_map_single(struct pci_dev *pdev, void *ptr,
size_t size, int direction)
{
return dma_map_single(&pdev->dev, ptr, size,
(enum dma_data_direction) direction);
}
static inline void pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr,
size_t size, int direction)
{
dma_unmap_single(&pdev->dev, dma_addr, size,
(enum dma_data_direction) direction);
}
#define pci_map_page(dev, page, off, size, dir) \
pci_map_single(dev, (page_address(page) + (off)), size, dir)
#define pci_unmap_page(dev,addr,sz,dir) \
pci_unmap_single(dev,addr,sz,dir)
/* pci_unmap_{single,page} is not a nop, thus... */ /* pci_unmap_{single,page} is not a nop, thus... */
#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \ #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
dma_addr_t ADDR_NAME; dma_addr_t ADDR_NAME;
...@@ -80,57 +49,6 @@ static inline void pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, ...@@ -80,57 +49,6 @@ static inline void pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr,
#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \ #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
(((PTR)->LEN_NAME) = (VAL)) (((PTR)->LEN_NAME) = (VAL))
static inline int pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg,
int nents, int direction)
{
return dma_map_sg(&pdev->dev, sg, nents,
(enum dma_data_direction) direction);
}
static inline void pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg,
int nents, int direction)
{
dma_unmap_sg(&pdev->dev, sg, nents,
(enum dma_data_direction) direction);
}
static inline void pci_dma_sync_single_for_cpu(struct pci_dev *pdev,
dma_addr_t dma_handle,
size_t size, int direction)
{
dma_sync_single_for_cpu(&pdev->dev, dma_handle, size,
(enum dma_data_direction) direction);
}
static inline void pci_dma_sync_single_for_device(struct pci_dev *pdev,
dma_addr_t dma_handle,
size_t size, int direction)
{
/* No flushing needed to sync cpu writes to the device. */
}
static inline void pci_dma_sync_sg_for_cpu(struct pci_dev *pdev,
struct scatterlist *sg,
int nents, int direction)
{
dma_sync_sg_for_cpu(&pdev->dev, sg, nents,
(enum dma_data_direction) direction);
}
static inline void pci_dma_sync_sg_for_device(struct pci_dev *pdev,
struct scatterlist *sg,
int nelems, int direction)
{
/* No flushing needed to sync cpu writes to the device. */
}
/* Return whether the given PCI device DMA address mask can
* be supported properly. For example, if your device can
* only drive the low 24-bits during PCI bus mastering, then
* you would pass 0x00ffffff as the mask to this function.
*/
extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask);
/* PCI IOMMU mapping bypass support. */ /* PCI IOMMU mapping bypass support. */
/* PCI 64-bit addressing works for all slots on all controller /* PCI 64-bit addressing works for all slots on all controller
...@@ -140,12 +58,6 @@ extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask); ...@@ -140,12 +58,6 @@ extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask);
#define PCI64_REQUIRED_MASK (~(dma64_addr_t)0) #define PCI64_REQUIRED_MASK (~(dma64_addr_t)0)
#define PCI64_ADDR_BASE 0xfffc000000000000UL #define PCI64_ADDR_BASE 0xfffc000000000000UL
static inline int pci_dma_mapping_error(struct pci_dev *pdev,
dma_addr_t dma_addr)
{
return dma_mapping_error(&pdev->dev, dma_addr);
}
#ifdef CONFIG_PCI #ifdef CONFIG_PCI
static inline void pci_dma_burst_advice(struct pci_dev *pdev, static inline void pci_dma_burst_advice(struct pci_dev *pdev,
enum pci_dma_burst_strategy *strat, enum pci_dma_burst_strategy *strat,
......
arch/sparc/kernel/Makefile
浏览文件 @ 2864697c
...@@ -61,7 +61,7 @@ obj-$(CONFIG_SPARC64_SMP) += cpumap.o ...@@ -61,7 +61,7 @@ obj-$(CONFIG_SPARC64_SMP) += cpumap.o
obj-$(CONFIG_SPARC32) += devres.o obj-$(CONFIG_SPARC32) += devres.o
devres-y := ../../../kernel/irq/devres.o devres-y := ../../../kernel/irq/devres.o
obj-$(CONFIG_SPARC32) += dma.o obj-y += dma.o
obj-$(CONFIG_SPARC32_PCI) += pcic.o obj-$(CONFIG_SPARC32_PCI) += pcic.o
......
arch/sparc/kernel/dma.c
浏览文件 @ 2864697c
/* dma.c: PCI and SBUS DMA accessors for 32-bit sparc.
*
* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
*/
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/dma-mapping.h> #include <linux/dma-mapping.h>
#include <linux/scatterlist.h> #include <linux/dma-debug.h>
#include <linux/mm.h>
#ifdef CONFIG_PCI
#include <linux/pci.h>
#endif
#include "dma.h" #define PREALLOC_DMA_DEBUG_ENTRIES (1 << 15)
int dma_supported(struct device *dev, u64 mask) static int __init dma_init(void)
{ {
#ifdef CONFIG_PCI dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
if (dev->bus == &pci_bus_type)
return pci_dma_supported(to_pci_dev(dev), mask);
#endif
return 0; return 0;
} }
EXPORT_SYMBOL(dma_supported); fs_initcall(dma_init);
int dma_set_mask(struct device *dev, u64 dma_mask)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type)
return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
#endif
return -EOPNOTSUPP;
}
EXPORT_SYMBOL(dma_set_mask);
static void *dma32_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type)
return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);
#endif
return sbus_alloc_consistent(dev, size, dma_handle);
}
static void dma32_free_coherent(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_handle)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_free_consistent(to_pci_dev(dev), size,
cpu_addr, dma_handle);
return;
}
#endif
sbus_free_consistent(dev, size, cpu_addr, dma_handle);
}
static dma_addr_t dma32_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type)
return pci_map_page(to_pci_dev(dev), page, offset,
size, (int)direction);
#endif
return sbus_map_single(dev, page_address(page) + offset,
size, (int)direction);
}
static void dma32_unmap_page(struct device *dev, dma_addr_t dma_address,
size_t size, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_unmap_page(to_pci_dev(dev), dma_address,
size, (int)direction);
return;
}
#endif
sbus_unmap_single(dev, dma_address, size, (int)direction);
}
static int dma32_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type)
return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
#endif
return sbus_map_sg(dev, sg, nents, direction);
}
void dma32_unmap_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_unmap_sg(to_pci_dev(dev), sg, nents, (int)direction);
return;
}
#endif
sbus_unmap_sg(dev, sg, nents, (int)direction);
}
static void dma32_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size,
enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
size, (int)direction);
return;
}
#endif
sbus_dma_sync_single_for_cpu(dev, dma_handle, size, (int) direction);
}
static void dma32_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
size, (int)direction);
return;
}
#endif
sbus_dma_sync_single_for_device(dev, dma_handle, size, (int) direction);
}
static void dma32_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
int nelems, enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg,
nelems, (int)direction);
return;
}
#endif
BUG();
}
static void dma32_sync_sg_for_device(struct device *dev,
struct scatterlist *sg, int nelems,
enum dma_data_direction direction)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) {
pci_dma_sync_sg_for_device(to_pci_dev(dev), sg,
nelems, (int)direction);
return;
}
#endif
BUG();
}
static const struct dma_ops dma32_dma_ops = {
.alloc_coherent = dma32_alloc_coherent,
.free_coherent = dma32_free_coherent,
.map_page = dma32_map_page,
.unmap_page = dma32_unmap_page,
.map_sg = dma32_map_sg,
.unmap_sg = dma32_unmap_sg,
.sync_single_for_cpu = dma32_sync_single_for_cpu,
.sync_single_for_device = dma32_sync_single_for_device,
.sync_sg_for_cpu = dma32_sync_sg_for_cpu,
.sync_sg_for_device = dma32_sync_sg_for_device,
};
const struct dma_ops *dma_ops = &dma32_dma_ops;
EXPORT_SYMBOL(dma_ops);
arch/sparc/kernel/dma.h 已删除 100644 → 0
浏览文件 @ 3c2ee2d9
void *sbus_alloc_consistent(struct device *dev, long len, u32 *dma_addrp);
void sbus_free_consistent(struct device *dev, long n, void *p, u32 ba);
dma_addr_t sbus_map_single(struct device *dev, void *va,
size_t len, int direction);
void sbus_unmap_single(struct device *dev, dma_addr_t ba,
size_t n, int direction);
int sbus_map_sg(struct device *dev, struct scatterlist *sg,
int n, int direction);
void sbus_unmap_sg(struct device *dev, struct scatterlist *sg,
int n, int direction);
void sbus_dma_sync_single_for_cpu(struct device *dev, dma_addr_t ba,
size_t size, int direction);
void sbus_dma_sync_single_for_device(struct device *dev, dma_addr_t ba,
size_t size, int direction);
arch/sparc/kernel/iommu.c
浏览文件 @ 2864697c
...@@ -353,7 +353,8 @@ static void dma_4u_free_coherent(struct device *dev, size_t size, ...@@ -353,7 +353,8 @@ static void dma_4u_free_coherent(struct device *dev, size_t size,
static dma_addr_t dma_4u_map_page(struct device *dev, struct page *page, static dma_addr_t dma_4u_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t sz, unsigned long offset, size_t sz,
enum dma_data_direction direction) enum dma_data_direction direction,
struct dma_attrs *attrs)
{ {
struct iommu *iommu; struct iommu *iommu;
struct strbuf *strbuf; struct strbuf *strbuf;
...@@ -474,7 +475,8 @@ static void strbuf_flush(struct strbuf *strbuf, struct iommu *iommu, ...@@ -474,7 +475,8 @@ static void strbuf_flush(struct strbuf *strbuf, struct iommu *iommu,
} }
static void dma_4u_unmap_page(struct device *dev, dma_addr_t bus_addr, static void dma_4u_unmap_page(struct device *dev, dma_addr_t bus_addr,
size_t sz, enum dma_data_direction direction) size_t sz, enum dma_data_direction direction,
struct dma_attrs *attrs)
{ {
struct iommu *iommu; struct iommu *iommu;
struct strbuf *strbuf; struct strbuf *strbuf;
...@@ -520,7 +522,8 @@ static void dma_4u_unmap_page(struct device *dev, dma_addr_t bus_addr, ...@@ -520,7 +522,8 @@ static void dma_4u_unmap_page(struct device *dev, dma_addr_t bus_addr,
} }
static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist, static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist,
int nelems, enum dma_data_direction direction) int nelems, enum dma_data_direction direction,
struct dma_attrs *attrs)
{ {
struct scatterlist *s, *outs, *segstart; struct scatterlist *s, *outs, *segstart;
unsigned long flags, handle, prot, ctx; unsigned long flags, handle, prot, ctx;
...@@ -691,7 +694,8 @@ static unsigned long fetch_sg_ctx(struct iommu *iommu, struct scatterlist *sg) ...@@ -691,7 +694,8 @@ static unsigned long fetch_sg_ctx(struct iommu *iommu, struct scatterlist *sg)
} }
static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist, static void dma_4u_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nelems, enum dma_data_direction direction) int nelems, enum dma_data_direction direction,
struct dma_attrs *attrs)
{ {
unsigned long flags, ctx; unsigned long flags, ctx;
struct scatterlist *sg; struct scatterlist *sg;
...@@ -822,7 +826,7 @@ static void dma_4u_sync_sg_for_cpu(struct device *dev, ...@@ -822,7 +826,7 @@ static void dma_4u_sync_sg_for_cpu(struct device *dev,
spin_unlock_irqrestore(&iommu->lock, flags); spin_unlock_irqrestore(&iommu->lock, flags);
} }
static const struct dma_ops sun4u_dma_ops = { static struct dma_map_ops sun4u_dma_ops = {
.alloc_coherent = dma_4u_alloc_coherent, .alloc_coherent = dma_4u_alloc_coherent,
.free_coherent = dma_4u_free_coherent, .free_coherent = dma_4u_free_coherent,
.map_page = dma_4u_map_page, .map_page = dma_4u_map_page,
...@@ -833,9 +837,11 @@ static const struct dma_ops sun4u_dma_ops = { ...@@ -833,9 +837,11 @@ static const struct dma_ops sun4u_dma_ops = {
.sync_sg_for_cpu = dma_4u_sync_sg_for_cpu, .sync_sg_for_cpu = dma_4u_sync_sg_for_cpu,
}; };
const struct dma_ops *dma_ops = &sun4u_dma_ops; struct dma_map_ops *dma_ops = &sun4u_dma_ops;
EXPORT_SYMBOL(dma_ops); EXPORT_SYMBOL(dma_ops);
extern int pci64_dma_supported(struct pci_dev *pdev, u64 device_mask);
int dma_supported(struct device *dev, u64 device_mask) int dma_supported(struct device *dev, u64 device_mask)
{ {
struct iommu *iommu = dev->archdata.iommu; struct iommu *iommu = dev->archdata.iommu;
...@@ -849,7 +855,7 @@ int dma_supported(struct device *dev, u64 device_mask) ...@@ -849,7 +855,7 @@ int dma_supported(struct device *dev, u64 device_mask)
#ifdef CONFIG_PCI #ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type) if (dev->bus == &pci_bus_type)
return pci_dma_supported(to_pci_dev(dev), device_mask); return pci64_dma_supported(to_pci_dev(dev), device_mask);
#endif #endif
return 0; return 0;
......
arch/sparc/kernel/ioport.c
浏览文件 @ 2864697c
...@@ -48,8 +48,6 @@ ...@@ -48,8 +48,6 @@
#include <asm/iommu.h> #include <asm/iommu.h>
#include <asm/io-unit.h> #include <asm/io-unit.h>
#include "dma.h"
#define mmu_inval_dma_area(p, l) /* Anton pulled it out for 2.4.0-xx */ #define mmu_inval_dma_area(p, l) /* Anton pulled it out for 2.4.0-xx */
static struct resource *_sparc_find_resource(struct resource *r, static struct resource *_sparc_find_resource(struct resource *r,
...@@ -246,7 +244,8 @@ EXPORT_SYMBOL(sbus_set_sbus64); ...@@ -246,7 +244,8 @@ EXPORT_SYMBOL(sbus_set_sbus64);
* Typically devices use them for control blocks. * Typically devices use them for control blocks.
* CPU may access them without any explicit flushing. * CPU may access them without any explicit flushing.
*/ */
void *sbus_alloc_consistent(struct device *dev, long len, u32 *dma_addrp) static void *sbus_alloc_coherent(struct device *dev, size_t len,
dma_addr_t *dma_addrp, gfp_t gfp)
{ {
struct of_device *op = to_of_device(dev); struct of_device *op = to_of_device(dev);
unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK; unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
...@@ -299,7 +298,8 @@ void *sbus_alloc_consistent(struct device *dev, long len, u32 *dma_addrp) ...@@ -299,7 +298,8 @@ void *sbus_alloc_consistent(struct device *dev, long len, u32 *dma_addrp)
return NULL; return NULL;
} }
void sbus_free_consistent(struct device *dev, long n, void *p, u32 ba) static void sbus_free_coherent(struct device *dev, size_t n, void *p,
dma_addr_t ba)
{ {
struct resource *res; struct resource *res;
struct page *pgv; struct page *pgv;
...@@ -317,7 +317,7 @@ void sbus_free_consistent(struct device *dev, long n, void *p, u32 ba) ...@@ -317,7 +317,7 @@ void sbus_free_consistent(struct device *dev, long n, void *p, u32 ba)
n = (n + PAGE_SIZE-1) & PAGE_MASK; n = (n + PAGE_SIZE-1) & PAGE_MASK;
if ((res->end-res->start)+1 != n) { if ((res->end-res->start)+1 != n) {
printk("sbus_free_consistent: region 0x%lx asked 0x%lx\n", printk("sbus_free_consistent: region 0x%lx asked 0x%zx\n",
(long)((res->end-res->start)+1), n); (long)((res->end-res->start)+1), n);
return; return;
} }
...@@ -337,8 +337,13 @@ void sbus_free_consistent(struct device *dev, long n, void *p, u32 ba) ...@@ -337,8 +337,13 @@ void sbus_free_consistent(struct device *dev, long n, void *p, u32 ba)
* CPU view of this memory may be inconsistent with * CPU view of this memory may be inconsistent with
* a device view and explicit flushing is necessary. * a device view and explicit flushing is necessary.
*/ */
dma_addr_t sbus_map_single(struct device *dev, void *va, size_t len, int direction) static dma_addr_t sbus_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t len,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{ {
void *va = page_address(page) + offset;
/* XXX why are some lengths signed, others unsigned? */ /* XXX why are some lengths signed, others unsigned? */
if (len <= 0) { if (len <= 0) {
return 0; return 0;
...@@ -350,12 +355,14 @@ dma_addr_t sbus_map_single(struct device *dev, void *va, size_t len, int directi ...@@ -350,12 +355,14 @@ dma_addr_t sbus_map_single(struct device *dev, void *va, size_t len, int directi
return mmu_get_scsi_one(dev, va, len); return mmu_get_scsi_one(dev, va, len);
} }
void sbus_unmap_single(struct device *dev, dma_addr_t ba, size_t n, int direction) static void sbus_unmap_page(struct device *dev, dma_addr_t ba, size_t n,
enum dma_data_direction dir, struct dma_attrs *attrs)
{ {
mmu_release_scsi_one(dev, ba, n); mmu_release_scsi_one(dev, ba, n);
} }
int sbus_map_sg(struct device *dev, struct scatterlist *sg, int n, int direction) static int sbus_map_sg(struct device *dev, struct scatterlist *sg, int n,
enum dma_data_direction dir, struct dma_attrs *attrs)
{ {
mmu_get_scsi_sgl(dev, sg, n); mmu_get_scsi_sgl(dev, sg, n);
...@@ -366,19 +373,38 @@ int sbus_map_sg(struct device *dev, struct scatterlist *sg, int n, int direction ...@@ -366,19 +373,38 @@ int sbus_map_sg(struct device *dev, struct scatterlist *sg, int n, int direction
return n; return n;
} }
void sbus_unmap_sg(struct device *dev, struct scatterlist *sg, int n, int direction) static void sbus_unmap_sg(struct device *dev, struct scatterlist *sg, int n,
enum dma_data_direction dir, struct dma_attrs *attrs)
{ {
mmu_release_scsi_sgl(dev, sg, n); mmu_release_scsi_sgl(dev, sg, n);
} }
void sbus_dma_sync_single_for_cpu(struct device *dev, dma_addr_t ba, size_t size, int direction) static void sbus_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
int n, enum dma_data_direction dir)
{ {
BUG();
} }
void sbus_dma_sync_single_for_device(struct device *dev, dma_addr_t ba, size_t size, int direction) static void sbus_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
int n, enum dma_data_direction dir)
{ {
BUG();
} }
struct dma_map_ops sbus_dma_ops = {
.alloc_coherent = sbus_alloc_coherent,
.free_coherent = sbus_free_coherent,
.map_page = sbus_map_page,
.unmap_page = sbus_unmap_page,
.map_sg = sbus_map_sg,
.unmap_sg = sbus_unmap_sg,
.sync_sg_for_cpu = sbus_sync_sg_for_cpu,
.sync_sg_for_device = sbus_sync_sg_for_device,
};
struct dma_map_ops *dma_ops = &sbus_dma_ops;
EXPORT_SYMBOL(dma_ops);
static int __init sparc_register_ioport(void) static int __init sparc_register_ioport(void)
{ {
register_proc_sparc_ioport(); register_proc_sparc_ioport();
...@@ -395,7 +421,8 @@ arch_initcall(sparc_register_ioport); ...@@ -395,7 +421,8 @@ arch_initcall(sparc_register_ioport);
/* Allocate and map kernel buffer using consistent mode DMA for a device. /* Allocate and map kernel buffer using consistent mode DMA for a device.
* hwdev should be valid struct pci_dev pointer for PCI devices. * hwdev should be valid struct pci_dev pointer for PCI devices.
*/ */
void *pci_alloc_consistent(struct pci_dev *pdev, size_t len, dma_addr_t *pba) static void *pci32_alloc_coherent(struct device *dev, size_t len,
dma_addr_t *pba, gfp_t gfp)
{ {
unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK; unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
unsigned long va; unsigned long va;
...@@ -439,7 +466,6 @@ void *pci_alloc_consistent(struct pci_dev *pdev, size_t len, dma_addr_t *pba) ...@@ -439,7 +466,6 @@ void *pci_alloc_consistent(struct pci_dev *pdev, size_t len, dma_addr_t *pba)
*pba = virt_to_phys(va); /* equals virt_to_bus (R.I.P.) for us. */ *pba = virt_to_phys(va); /* equals virt_to_bus (R.I.P.) for us. */
return (void *) res->start; return (void *) res->start;
} }
EXPORT_SYMBOL(pci_alloc_consistent);
/* Free and unmap a consistent DMA buffer. /* Free and unmap a consistent DMA buffer.
* cpu_addr is what was returned from pci_alloc_consistent, * cpu_addr is what was returned from pci_alloc_consistent,
...@@ -449,7 +475,8 @@ EXPORT_SYMBOL(pci_alloc_consistent); ...@@ -449,7 +475,8 @@ EXPORT_SYMBOL(pci_alloc_consistent);
* References to the memory and mappings associated with cpu_addr/dma_addr * References to the memory and mappings associated with cpu_addr/dma_addr
* past this call are illegal. * past this call are illegal.
*/ */
void pci_free_consistent(struct pci_dev *pdev, size_t n, void *p, dma_addr_t ba) static void pci32_free_coherent(struct device *dev, size_t n, void *p,
dma_addr_t ba)
{ {
struct resource *res; struct resource *res;
unsigned long pgp; unsigned long pgp;
...@@ -481,60 +508,18 @@ void pci_free_consistent(struct pci_dev *pdev, size_t n, void *p, dma_addr_t ba) ...@@ -481,60 +508,18 @@ void pci_free_consistent(struct pci_dev *pdev, size_t n, void *p, dma_addr_t ba)
free_pages(pgp, get_order(n)); free_pages(pgp, get_order(n));
} }
EXPORT_SYMBOL(pci_free_consistent);
/* Map a single buffer of the indicated size for DMA in streaming mode.
* The 32-bit bus address to use is returned.
*
* Once the device is given the dma address, the device owns this memory
* until either pci_unmap_single or pci_dma_sync_single_* is performed.
*/
dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size,
int direction)
{
BUG_ON(direction == PCI_DMA_NONE);
/* IIep is write-through, not flushing. */
return virt_to_phys(ptr);
}
EXPORT_SYMBOL(pci_map_single);
/* Unmap a single streaming mode DMA translation. The dma_addr and size
* must match what was provided for in a previous pci_map_single call. All
* other usages are undefined.
*
* After this call, reads by the cpu to the buffer are guaranteed to see
* whatever the device wrote there.
*/
void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t ba, size_t size,
int direction)
{
BUG_ON(direction == PCI_DMA_NONE);
if (direction != PCI_DMA_TODEVICE) {
mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
(size + PAGE_SIZE-1) & PAGE_MASK);
}
}
EXPORT_SYMBOL(pci_unmap_single);
/* /*
* Same as pci_map_single, but with pages. * Same as pci_map_single, but with pages.
*/ */
dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page, static dma_addr_t pci32_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, int direction) unsigned long offset, size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{ {
BUG_ON(direction == PCI_DMA_NONE);
/* IIep is write-through, not flushing. */ /* IIep is write-through, not flushing. */
return page_to_phys(page) + offset; return page_to_phys(page) + offset;
} }
EXPORT_SYMBOL(pci_map_page);
void pci_unmap_page(struct pci_dev *hwdev,
dma_addr_t dma_address, size_t size, int direction)
{
BUG_ON(direction == PCI_DMA_NONE);
/* mmu_inval_dma_area XXX */
}
EXPORT_SYMBOL(pci_unmap_page);
/* Map a set of buffers described by scatterlist in streaming /* Map a set of buffers described by scatterlist in streaming
* mode for DMA. This is the scather-gather version of the * mode for DMA. This is the scather-gather version of the
...@@ -551,13 +536,13 @@ EXPORT_SYMBOL(pci_unmap_page); ...@@ -551,13 +536,13 @@ EXPORT_SYMBOL(pci_unmap_page);
* Device ownership issues as mentioned above for pci_map_single are * Device ownership issues as mentioned above for pci_map_single are
* the same here. * the same here.
*/ */
int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, static int pci32_map_sg(struct device *device, struct scatterlist *sgl,
int direction) int nents, enum dma_data_direction dir,
struct dma_attrs *attrs)
{ {
struct scatterlist *sg; struct scatterlist *sg;
int n; int n;
BUG_ON(direction == PCI_DMA_NONE);
/* IIep is write-through, not flushing. */ /* IIep is write-through, not flushing. */
for_each_sg(sgl, sg, nents, n) { for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg_page(sg)) == NULL); BUG_ON(page_address(sg_page(sg)) == NULL);
...@@ -566,20 +551,19 @@ int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, ...@@ -566,20 +551,19 @@ int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents,
} }
return nents; return nents;
} }
EXPORT_SYMBOL(pci_map_sg);
/* Unmap a set of streaming mode DMA translations. /* Unmap a set of streaming mode DMA translations.
* Again, cpu read rules concerning calls here are the same as for * Again, cpu read rules concerning calls here are the same as for
* pci_unmap_single() above. * pci_unmap_single() above.
*/ */
void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, static void pci32_unmap_sg(struct device *dev, struct scatterlist *sgl,
int direction) int nents, enum dma_data_direction dir,
struct dma_attrs *attrs)
{ {
struct scatterlist *sg; struct scatterlist *sg;
int n; int n;
BUG_ON(direction == PCI_DMA_NONE); if (dir != PCI_DMA_TODEVICE) {
if (direction != PCI_DMA_TODEVICE) {
for_each_sg(sgl, sg, nents, n) { for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg_page(sg)) == NULL); BUG_ON(page_address(sg_page(sg)) == NULL);
mmu_inval_dma_area( mmu_inval_dma_area(
...@@ -588,7 +572,6 @@ void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, ...@@ -588,7 +572,6 @@ void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sgl, int nents,
} }
} }
} }
EXPORT_SYMBOL(pci_unmap_sg);
/* Make physical memory consistent for a single /* Make physical memory consistent for a single
* streaming mode DMA translation before or after a transfer. * streaming mode DMA translation before or after a transfer.
...@@ -600,25 +583,23 @@ EXPORT_SYMBOL(pci_unmap_sg); ...@@ -600,25 +583,23 @@ EXPORT_SYMBOL(pci_unmap_sg);
* must first perform a pci_dma_sync_for_device, and then the * must first perform a pci_dma_sync_for_device, and then the
* device again owns the buffer. * device again owns the buffer.
*/ */
void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t ba, size_t size, int direction) static void pci32_sync_single_for_cpu(struct device *dev, dma_addr_t ba,
size_t size, enum dma_data_direction dir)
{ {
BUG_ON(direction == PCI_DMA_NONE); if (dir != PCI_DMA_TODEVICE) {
if (direction != PCI_DMA_TODEVICE) {
mmu_inval_dma_area((unsigned long)phys_to_virt(ba), mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
(size + PAGE_SIZE-1) & PAGE_MASK); (size + PAGE_SIZE-1) & PAGE_MASK);
} }
} }
EXPORT_SYMBOL(pci_dma_sync_single_for_cpu);
void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t ba, size_t size, int direction) static void pci32_sync_single_for_device(struct device *dev, dma_addr_t ba,
size_t size, enum dma_data_direction dir)
{ {
BUG_ON(direction == PCI_DMA_NONE); if (dir != PCI_DMA_TODEVICE) {
if (direction != PCI_DMA_TODEVICE) {
mmu_inval_dma_area((unsigned long)phys_to_virt(ba), mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
(size + PAGE_SIZE-1) & PAGE_MASK); (size + PAGE_SIZE-1) & PAGE_MASK);
} }
} }
EXPORT_SYMBOL(pci_dma_sync_single_for_device);
/* Make physical memory consistent for a set of streaming /* Make physical memory consistent for a set of streaming
* mode DMA translations after a transfer. * mode DMA translations after a transfer.
...@@ -626,13 +607,13 @@ EXPORT_SYMBOL(pci_dma_sync_single_for_device); ...@@ -626,13 +607,13 @@ EXPORT_SYMBOL(pci_dma_sync_single_for_device);
* The same as pci_dma_sync_single_* but for a scatter-gather list, * The same as pci_dma_sync_single_* but for a scatter-gather list,
* same rules and usage. * same rules and usage.
*/ */
void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, int direction) static void pci32_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl,
int nents, enum dma_data_direction dir)
{ {
struct scatterlist *sg; struct scatterlist *sg;
int n; int n;
BUG_ON(direction == PCI_DMA_NONE); if (dir != PCI_DMA_TODEVICE) {
if (direction != PCI_DMA_TODEVICE) {
for_each_sg(sgl, sg, nents, n) { for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg_page(sg)) == NULL); BUG_ON(page_address(sg_page(sg)) == NULL);
mmu_inval_dma_area( mmu_inval_dma_area(
...@@ -641,15 +622,14 @@ void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sgl, int ...@@ -641,15 +622,14 @@ void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sgl, int
} }
} }
} }
EXPORT_SYMBOL(pci_dma_sync_sg_for_cpu);
void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sgl, int nents, int direction) static void pci32_sync_sg_for_device(struct device *device, struct scatterlist *sgl,
int nents, enum dma_data_direction dir)
{ {
struct scatterlist *sg; struct scatterlist *sg;
int n; int n;
BUG_ON(direction == PCI_DMA_NONE); if (dir != PCI_DMA_TODEVICE) {
if (direction != PCI_DMA_TODEVICE) {
for_each_sg(sgl, sg, nents, n) { for_each_sg(sgl, sg, nents, n) {
BUG_ON(page_address(sg_page(sg)) == NULL); BUG_ON(page_address(sg_page(sg)) == NULL);
mmu_inval_dma_area( mmu_inval_dma_area(
...@@ -658,9 +638,49 @@ void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sgl, ...@@ -658,9 +638,49 @@ void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sgl,
} }
} }
} }
EXPORT_SYMBOL(pci_dma_sync_sg_for_device);
struct dma_map_ops pci32_dma_ops = {
.alloc_coherent = pci32_alloc_coherent,
.free_coherent = pci32_free_coherent,
.map_page = pci32_map_page,
.map_sg = pci32_map_sg,
.unmap_sg = pci32_unmap_sg,
.sync_single_for_cpu = pci32_sync_single_for_cpu,
.sync_single_for_device = pci32_sync_single_for_device,
.sync_sg_for_cpu = pci32_sync_sg_for_cpu,
.sync_sg_for_device = pci32_sync_sg_for_device,
};
EXPORT_SYMBOL(pci32_dma_ops);
#endif /* CONFIG_PCI */ #endif /* CONFIG_PCI */
/*
* Return whether the given PCI device DMA address mask can be
* supported properly. For example, if your device can only drive the
* low 24-bits during PCI bus mastering, then you would pass
* 0x00ffffff as the mask to this function.
*/
int dma_supported(struct device *dev, u64 mask)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type)
return 1;
#endif
return 0;
}
EXPORT_SYMBOL(dma_supported);
int dma_set_mask(struct device *dev, u64 dma_mask)
{
#ifdef CONFIG_PCI
if (dev->bus == &pci_bus_type)
return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
#endif
return -EOPNOTSUPP;
}
EXPORT_SYMBOL(dma_set_mask);
#ifdef CONFIG_PROC_FS #ifdef CONFIG_PROC_FS
static int static int
......
arch/sparc/kernel/pci.c
浏览文件 @ 2864697c
...@@ -1039,7 +1039,7 @@ static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit) ...@@ -1039,7 +1039,7 @@ static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit)
pci_dev_put(ali_isa_bridge); pci_dev_put(ali_isa_bridge);
} }
int pci_dma_supported(struct pci_dev *pdev, u64 device_mask) int pci64_dma_supported(struct pci_dev *pdev, u64 device_mask)
{ {
u64 dma_addr_mask; u64 dma_addr_mask;
......
arch/sparc/kernel/pci_sun4v.c
浏览文件 @ 2864697c
...@@ -232,7 +232,8 @@ static void dma_4v_free_coherent(struct device *dev, size_t size, void *cpu, ...@@ -232,7 +232,8 @@ static void dma_4v_free_coherent(struct device *dev, size_t size, void *cpu,
static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page, static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t sz, unsigned long offset, size_t sz,
enum dma_data_direction direction) enum dma_data_direction direction,
struct dma_attrs *attrs)
{ {
struct iommu *iommu; struct iommu *iommu;
unsigned long flags, npages, oaddr; unsigned long flags, npages, oaddr;
...@@ -296,7 +297,8 @@ static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page, ...@@ -296,7 +297,8 @@ static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page,
} }
static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr, static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr,
size_t sz, enum dma_data_direction direction) size_t sz, enum dma_data_direction direction,
struct dma_attrs *attrs)
{ {
struct pci_pbm_info *pbm; struct pci_pbm_info *pbm;
struct iommu *iommu; struct iommu *iommu;
...@@ -336,7 +338,8 @@ static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr, ...@@ -336,7 +338,8 @@ static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr,
} }
static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist, static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
int nelems, enum dma_data_direction direction) int nelems, enum dma_data_direction direction,
struct dma_attrs *attrs)
{ {
struct scatterlist *s, *outs, *segstart; struct scatterlist *s, *outs, *segstart;
unsigned long flags, handle, prot; unsigned long flags, handle, prot;
...@@ -478,7 +481,8 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist, ...@@ -478,7 +481,8 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist,
} }
static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist, static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nelems, enum dma_data_direction direction) int nelems, enum dma_data_direction direction,
struct dma_attrs *attrs)
{ {
struct pci_pbm_info *pbm; struct pci_pbm_info *pbm;
struct scatterlist *sg; struct scatterlist *sg;
...@@ -521,29 +525,13 @@ static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist, ...@@ -521,29 +525,13 @@ static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist,
spin_unlock_irqrestore(&iommu->lock, flags); spin_unlock_irqrestore(&iommu->lock, flags);
} }
static void dma_4v_sync_single_for_cpu(struct device *dev, static struct dma_map_ops sun4v_dma_ops = {
dma_addr_t bus_addr, size_t sz,
enum dma_data_direction direction)
{
/* Nothing to do... */
}
static void dma_4v_sync_sg_for_cpu(struct device *dev,
struct scatterlist *sglist, int nelems,
enum dma_data_direction direction)
{
/* Nothing to do... */
}
static const struct dma_ops sun4v_dma_ops = {
.alloc_coherent = dma_4v_alloc_coherent, .alloc_coherent = dma_4v_alloc_coherent,
.free_coherent = dma_4v_free_coherent, .free_coherent = dma_4v_free_coherent,
.map_page = dma_4v_map_page, .map_page = dma_4v_map_page,
.unmap_page = dma_4v_unmap_page, .unmap_page = dma_4v_unmap_page,
.map_sg = dma_4v_map_sg, .map_sg = dma_4v_map_sg,
.unmap_sg = dma_4v_unmap_sg, .unmap_sg = dma_4v_unmap_sg,
.sync_single_for_cpu = dma_4v_sync_single_for_cpu,
.sync_sg_for_cpu = dma_4v_sync_sg_for_cpu,
}; };
static void __devinit pci_sun4v_scan_bus(struct pci_pbm_info *pbm, static void __devinit pci_sun4v_scan_bus(struct pci_pbm_info *pbm,
......
arch/x86/include/asm/dma-mapping.h
浏览文件 @ 2864697c
...@@ -55,6 +55,24 @@ extern int dma_set_mask(struct device *dev, u64 mask); ...@@ -55,6 +55,24 @@ extern int dma_set_mask(struct device *dev, u64 mask);
extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag); dma_addr_t *dma_addr, gfp_t flag);
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
if (!dev->dma_mask)
return 0;
return addr + size <= *dev->dma_mask;
}
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
return paddr;
}
static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
{
return daddr;
}
static inline void static inline void
dma_cache_sync(struct device *dev, void *vaddr, size_t size, dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction dir) enum dma_data_direction dir)
......
arch/x86/kernel/pci-dma.c
浏览文件 @ 2864697c
...@@ -147,7 +147,7 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size, ...@@ -147,7 +147,7 @@ void *dma_generic_alloc_coherent(struct device *dev, size_t size,
return NULL; return NULL;
addr = page_to_phys(page); addr = page_to_phys(page);
if (!is_buffer_dma_capable(dma_mask, addr, size)) { if (addr + size > dma_mask) {
__free_pages(page, get_order(size)); __free_pages(page, get_order(size));
if (dma_mask < DMA_BIT_MASK(32) && !(flag & GFP_DMA)) { if (dma_mask < DMA_BIT_MASK(32) && !(flag & GFP_DMA)) {
......
arch/x86/kernel/pci-gart_64.c
浏览文件 @ 2864697c
...@@ -190,14 +190,13 @@ static void iommu_full(struct device *dev, size_t size, int dir) ...@@ -190,14 +190,13 @@ static void iommu_full(struct device *dev, size_t size, int dir)
static inline int static inline int
need_iommu(struct device *dev, unsigned long addr, size_t size) need_iommu(struct device *dev, unsigned long addr, size_t size)
{ {
return force_iommu || return force_iommu || !dma_capable(dev, addr, size);
!is_buffer_dma_capable(*dev->dma_mask, addr, size);
} }
static inline int static inline int
nonforced_iommu(struct device *dev, unsigned long addr, size_t size) nonforced_iommu(struct device *dev, unsigned long addr, size_t size)
{ {
return !is_buffer_dma_capable(*dev->dma_mask, addr, size); return !dma_capable(dev, addr, size);
} }
/* Map a single continuous physical area into the IOMMU. /* Map a single continuous physical area into the IOMMU.
......
arch/x86/kernel/pci-nommu.c
浏览文件 @ 2864697c
...@@ -14,7 +14,7 @@ ...@@ -14,7 +14,7 @@
static int static int
check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size) check_addr(char *name, struct device *hwdev, dma_addr_t bus, size_t size)
{ {
if (hwdev && !is_buffer_dma_capable(*hwdev->dma_mask, bus, size)) { if (hwdev && !dma_capable(hwdev, bus, size)) {
if (*hwdev->dma_mask >= DMA_BIT_MASK(32)) if (*hwdev->dma_mask >= DMA_BIT_MASK(32))
printk(KERN_ERR printk(KERN_ERR
"nommu_%s: overflow %Lx+%zu of device mask %Lx\n", "nommu_%s: overflow %Lx+%zu of device mask %Lx\n",
...@@ -79,12 +79,29 @@ static void nommu_free_coherent(struct device *dev, size_t size, void *vaddr, ...@@ -79,12 +79,29 @@ static void nommu_free_coherent(struct device *dev, size_t size, void *vaddr,
free_pages((unsigned long)vaddr, get_order(size)); free_pages((unsigned long)vaddr, get_order(size));
} }
static void nommu_sync_single_for_device(struct device *dev,
dma_addr_t addr, size_t size,
enum dma_data_direction dir)
{
flush_write_buffers();
}
static void nommu_sync_sg_for_device(struct device *dev,
struct scatterlist *sg, int nelems,
enum dma_data_direction dir)
{
flush_write_buffers();
}
struct dma_map_ops nommu_dma_ops = { struct dma_map_ops nommu_dma_ops = {
.alloc_coherent = dma_generic_alloc_coherent, .alloc_coherent = dma_generic_alloc_coherent,
.free_coherent = nommu_free_coherent, .free_coherent = nommu_free_coherent,
.map_sg = nommu_map_sg, .map_sg = nommu_map_sg,
.map_page = nommu_map_page, .map_page = nommu_map_page,
.is_phys = 1, .sync_single_for_device = nommu_sync_single_for_device,
.sync_sg_for_device = nommu_sync_sg_for_device,
.is_phys = 1,
}; };
void __init no_iommu_init(void) void __init no_iommu_init(void)
......
arch/x86/kernel/pci-swiotlb.c
浏览文件 @ 2864697c
...@@ -13,31 +13,6 @@ ...@@ -13,31 +13,6 @@
int swiotlb __read_mostly; int swiotlb __read_mostly;
void * __init swiotlb_alloc_boot(size_t size, unsigned long nslabs)
{
return alloc_bootmem_low_pages(size);
}
void *swiotlb_alloc(unsigned order, unsigned long nslabs)
{
return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order);
}
dma_addr_t swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
{
return paddr;
}
phys_addr_t swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
{
return baddr;
}
int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
{
return 0;
}
static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size, static void *x86_swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags) dma_addr_t *dma_handle, gfp_t flags)
{ {
......
include/asm-generic/dma-mapping-common.h
浏览文件 @ 2864697c
...@@ -103,7 +103,6 @@ static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, ...@@ -103,7 +103,6 @@ static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
if (ops->sync_single_for_cpu) if (ops->sync_single_for_cpu)
ops->sync_single_for_cpu(dev, addr, size, dir); ops->sync_single_for_cpu(dev, addr, size, dir);
debug_dma_sync_single_for_cpu(dev, addr, size, dir); debug_dma_sync_single_for_cpu(dev, addr, size, dir);
flush_write_buffers();
} }
static inline void dma_sync_single_for_device(struct device *dev, static inline void dma_sync_single_for_device(struct device *dev,
...@@ -116,7 +115,6 @@ static inline void dma_sync_single_for_device(struct device *dev, ...@@ -116,7 +115,6 @@ static inline void dma_sync_single_for_device(struct device *dev,
if (ops->sync_single_for_device) if (ops->sync_single_for_device)
ops->sync_single_for_device(dev, addr, size, dir); ops->sync_single_for_device(dev, addr, size, dir);
debug_dma_sync_single_for_device(dev, addr, size, dir); debug_dma_sync_single_for_device(dev, addr, size, dir);
flush_write_buffers();
} }
static inline void dma_sync_single_range_for_cpu(struct device *dev, static inline void dma_sync_single_range_for_cpu(struct device *dev,
...@@ -132,7 +130,6 @@ static inline void dma_sync_single_range_for_cpu(struct device *dev, ...@@ -132,7 +130,6 @@ static inline void dma_sync_single_range_for_cpu(struct device *dev,
ops->sync_single_range_for_cpu(dev, addr, offset, size, dir); ops->sync_single_range_for_cpu(dev, addr, offset, size, dir);
debug_dma_sync_single_range_for_cpu(dev, addr, offset, size, dir); debug_dma_sync_single_range_for_cpu(dev, addr, offset, size, dir);
flush_write_buffers();
} else } else
dma_sync_single_for_cpu(dev, addr, size, dir); dma_sync_single_for_cpu(dev, addr, size, dir);
} }
...@@ -150,7 +147,6 @@ static inline void dma_sync_single_range_for_device(struct device *dev, ...@@ -150,7 +147,6 @@ static inline void dma_sync_single_range_for_device(struct device *dev,
ops->sync_single_range_for_device(dev, addr, offset, size, dir); ops->sync_single_range_for_device(dev, addr, offset, size, dir);
debug_dma_sync_single_range_for_device(dev, addr, offset, size, dir); debug_dma_sync_single_range_for_device(dev, addr, offset, size, dir);
flush_write_buffers();
} else } else
dma_sync_single_for_device(dev, addr, size, dir); dma_sync_single_for_device(dev, addr, size, dir);
} }
...@@ -165,7 +161,6 @@ dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, ...@@ -165,7 +161,6 @@ dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
if (ops->sync_sg_for_cpu) if (ops->sync_sg_for_cpu)
ops->sync_sg_for_cpu(dev, sg, nelems, dir); ops->sync_sg_for_cpu(dev, sg, nelems, dir);
debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir); debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
flush_write_buffers();
} }
static inline void static inline void
...@@ -179,7 +174,6 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, ...@@ -179,7 +174,6 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
ops->sync_sg_for_device(dev, sg, nelems, dir); ops->sync_sg_for_device(dev, sg, nelems, dir);
debug_dma_sync_sg_for_device(dev, sg, nelems, dir); debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
flush_write_buffers();
} }
#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL) #define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
......
include/linux/dma-mapping.h
浏览文件 @ 2864697c
...@@ -98,11 +98,6 @@ static inline int is_device_dma_capable(struct device *dev) ...@@ -98,11 +98,6 @@ static inline int is_device_dma_capable(struct device *dev)
return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE; return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE;
} }
static inline int is_buffer_dma_capable(u64 mask, dma_addr_t addr, size_t size)
{
return addr + size <= mask;
}
#ifdef CONFIG_HAS_DMA #ifdef CONFIG_HAS_DMA
#include <asm/dma-mapping.h> #include <asm/dma-mapping.h>
#else #else
......
include/linux/swiotlb.h
浏览文件 @ 2864697c
...@@ -14,7 +14,6 @@ struct scatterlist; ...@@ -14,7 +14,6 @@ struct scatterlist;
*/ */
#define IO_TLB_SEGSIZE 128 #define IO_TLB_SEGSIZE 128
/* /*
* log of the size of each IO TLB slab. The number of slabs is command line * log of the size of each IO TLB slab. The number of slabs is command line
* controllable. * controllable.
...@@ -24,16 +23,6 @@ struct scatterlist; ...@@ -24,16 +23,6 @@ struct scatterlist;
extern void extern void
swiotlb_init(void); swiotlb_init(void);
extern void *swiotlb_alloc_boot(size_t bytes, unsigned long nslabs);
extern void *swiotlb_alloc(unsigned order, unsigned long nslabs);
extern dma_addr_t swiotlb_phys_to_bus(struct device *hwdev,
phys_addr_t address);
extern phys_addr_t swiotlb_bus_to_phys(struct device *hwdev,
dma_addr_t address);
extern int swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size);
extern void extern void
*swiotlb_alloc_coherent(struct device *hwdev, size_t size, *swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t *dma_handle, gfp_t flags); dma_addr_t *dma_handle, gfp_t flags);
......
lib/swiotlb.c
浏览文件 @ 2864697c
...@@ -114,46 +114,11 @@ setup_io_tlb_npages(char *str) ...@@ -114,46 +114,11 @@ setup_io_tlb_npages(char *str)
__setup("swiotlb=", setup_io_tlb_npages); __setup("swiotlb=", setup_io_tlb_npages);
/* make io_tlb_overflow tunable too? */ /* make io_tlb_overflow tunable too? */
void * __weak __init swiotlb_alloc_boot(size_t size, unsigned long nslabs) /* Note that this doesn't work with highmem page */
{
return alloc_bootmem_low_pages(size);
}
void * __weak swiotlb_alloc(unsigned order, unsigned long nslabs)
{
return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order);
}
dma_addr_t __weak swiotlb_phys_to_bus(struct device *hwdev, phys_addr_t paddr)
{
return paddr;
}
phys_addr_t __weak swiotlb_bus_to_phys(struct device *hwdev, dma_addr_t baddr)
{
return baddr;
}
static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev, static dma_addr_t swiotlb_virt_to_bus(struct device *hwdev,
volatile void *address) volatile void *address)
{ {
return swiotlb_phys_to_bus(hwdev, virt_to_phys(address)); return phys_to_dma(hwdev, virt_to_phys(address));
}
void * __weak swiotlb_bus_to_virt(struct device *hwdev, dma_addr_t address)
{
return phys_to_virt(swiotlb_bus_to_phys(hwdev, address));
}
int __weak swiotlb_arch_address_needs_mapping(struct device *hwdev,
dma_addr_t addr, size_t size)
{
return !is_buffer_dma_capable(dma_get_mask(hwdev), addr, size);
}
int __weak swiotlb_arch_range_needs_mapping(phys_addr_t paddr, size_t size)
{
return 0;
} }
static void swiotlb_print_info(unsigned long bytes) static void swiotlb_print_info(unsigned long bytes)
...@@ -189,7 +154,7 @@ swiotlb_init_with_default_size(size_t default_size) ...@@ -189,7 +154,7 @@ swiotlb_init_with_default_size(size_t default_size)
/* /*
* Get IO TLB memory from the low pages * Get IO TLB memory from the low pages
*/ */
io_tlb_start = swiotlb_alloc_boot(bytes, io_tlb_nslabs); io_tlb_start = alloc_bootmem_low_pages(bytes);
if (!io_tlb_start) if (!io_tlb_start)
panic("Cannot allocate SWIOTLB buffer"); panic("Cannot allocate SWIOTLB buffer");
io_tlb_end = io_tlb_start + bytes; io_tlb_end = io_tlb_start + bytes;
...@@ -245,7 +210,8 @@ swiotlb_late_init_with_default_size(size_t default_size) ...@@ -245,7 +210,8 @@ swiotlb_late_init_with_default_size(size_t default_size)
bytes = io_tlb_nslabs << IO_TLB_SHIFT; bytes = io_tlb_nslabs << IO_TLB_SHIFT;
while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) { while ((SLABS_PER_PAGE << order) > IO_TLB_MIN_SLABS) {
io_tlb_start = swiotlb_alloc(order, io_tlb_nslabs); io_tlb_start = (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN,
order);
if (io_tlb_start) if (io_tlb_start)
break; break;
order--; order--;
...@@ -315,20 +281,10 @@ swiotlb_late_init_with_default_size(size_t default_size) ...@@ -315,20 +281,10 @@ swiotlb_late_init_with_default_size(size_t default_size)
return -ENOMEM; return -ENOMEM;
} }
static inline int static int is_swiotlb_buffer(phys_addr_t paddr)
address_needs_mapping(struct device *hwdev, dma_addr_t addr, size_t size)
{ {
return swiotlb_arch_address_needs_mapping(hwdev, addr, size); return paddr >= virt_to_phys(io_tlb_start) &&
} paddr < virt_to_phys(io_tlb_end);
static inline int range_needs_mapping(phys_addr_t paddr, size_t size)
{
return swiotlb_force || swiotlb_arch_range_needs_mapping(paddr, size);
}
static int is_swiotlb_buffer(char *addr)
{
return addr >= io_tlb_start && addr < io_tlb_end;
} }
/* /*
...@@ -561,9 +517,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, ...@@ -561,9 +517,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_mask = hwdev->coherent_dma_mask; dma_mask = hwdev->coherent_dma_mask;
ret = (void *)__get_free_pages(flags, order); ret = (void *)__get_free_pages(flags, order);
if (ret && if (ret && swiotlb_virt_to_bus(hwdev, ret) + size > dma_mask) {
!is_buffer_dma_capable(dma_mask, swiotlb_virt_to_bus(hwdev, ret),
size)) {
/* /*
* The allocated memory isn't reachable by the device. * The allocated memory isn't reachable by the device.
*/ */
...@@ -585,7 +539,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size, ...@@ -585,7 +539,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dev_addr = swiotlb_virt_to_bus(hwdev, ret); dev_addr = swiotlb_virt_to_bus(hwdev, ret);
/* Confirm address can be DMA'd by device */ /* Confirm address can be DMA'd by device */
if (!is_buffer_dma_capable(dma_mask, dev_addr, size)) { if (dev_addr + size > dma_mask) {
printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n", printk("hwdev DMA mask = 0x%016Lx, dev_addr = 0x%016Lx\n",
(unsigned long long)dma_mask, (unsigned long long)dma_mask,
(unsigned long long)dev_addr); (unsigned long long)dev_addr);
...@@ -601,11 +555,13 @@ EXPORT_SYMBOL(swiotlb_alloc_coherent); ...@@ -601,11 +555,13 @@ EXPORT_SYMBOL(swiotlb_alloc_coherent);
void void
swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr, swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr,
dma_addr_t dma_handle) dma_addr_t dev_addr)
{ {
phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);
WARN_ON(irqs_disabled()); WARN_ON(irqs_disabled());
if (!is_swiotlb_buffer(vaddr)) if (!is_swiotlb_buffer(paddr))
free_pages((unsigned long) vaddr, get_order(size)); free_pages((unsigned long)vaddr, get_order(size));
else else
/* DMA_TO_DEVICE to avoid memcpy in unmap_single */ /* DMA_TO_DEVICE to avoid memcpy in unmap_single */
do_unmap_single(hwdev, vaddr, size, DMA_TO_DEVICE); do_unmap_single(hwdev, vaddr, size, DMA_TO_DEVICE);
...@@ -625,12 +581,15 @@ swiotlb_full(struct device *dev, size_t size, int dir, int do_panic) ...@@ -625,12 +581,15 @@ swiotlb_full(struct device *dev, size_t size, int dir, int do_panic)
printk(KERN_ERR "DMA: Out of SW-IOMMU space for %zu bytes at " printk(KERN_ERR "DMA: Out of SW-IOMMU space for %zu bytes at "
"device %s\n", size, dev ? dev_name(dev) : "?"); "device %s\n", size, dev ? dev_name(dev) : "?");
if (size > io_tlb_overflow && do_panic) { if (size <= io_tlb_overflow || !do_panic)
if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) return;
panic("DMA: Memory would be corrupted\n");
if (dir == DMA_TO_DEVICE || dir == DMA_BIDIRECTIONAL) if (dir == DMA_BIDIRECTIONAL)
panic("DMA: Random memory would be DMAed\n"); panic("DMA: Random memory could be DMA accessed\n");
} if (dir == DMA_FROM_DEVICE)
panic("DMA: Random memory could be DMA written\n");
if (dir == DMA_TO_DEVICE)
panic("DMA: Random memory could be DMA read\n");
} }
/* /*
...@@ -646,7 +605,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, ...@@ -646,7 +605,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
struct dma_attrs *attrs) struct dma_attrs *attrs)
{ {
phys_addr_t phys = page_to_phys(page) + offset; phys_addr_t phys = page_to_phys(page) + offset;
dma_addr_t dev_addr = swiotlb_phys_to_bus(dev, phys); dma_addr_t dev_addr = phys_to_dma(dev, phys);
void *map; void *map;
BUG_ON(dir == DMA_NONE); BUG_ON(dir == DMA_NONE);
...@@ -655,8 +614,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, ...@@ -655,8 +614,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
* we can safely return the device addr and not worry about bounce * we can safely return the device addr and not worry about bounce
* buffering it. * buffering it.
*/ */
if (!address_needs_mapping(dev, dev_addr, size) && if (dma_capable(dev, dev_addr, size) && !swiotlb_force)
!range_needs_mapping(phys, size))
return dev_addr; return dev_addr;
/* /*
...@@ -673,7 +631,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page, ...@@ -673,7 +631,7 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
/* /*
* Ensure that the address returned is DMA'ble * Ensure that the address returned is DMA'ble
*/ */
if (address_needs_mapping(dev, dev_addr, size)) if (!dma_capable(dev, dev_addr, size))
panic("map_single: bounce buffer is not DMA'ble"); panic("map_single: bounce buffer is not DMA'ble");
return dev_addr; return dev_addr;
...@@ -691,19 +649,25 @@ EXPORT_SYMBOL_GPL(swiotlb_map_page); ...@@ -691,19 +649,25 @@ EXPORT_SYMBOL_GPL(swiotlb_map_page);
static void unmap_single(struct device *hwdev, dma_addr_t dev_addr, static void unmap_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir) size_t size, int dir)
{ {
char *dma_addr = swiotlb_bus_to_virt(hwdev, dev_addr); phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);
BUG_ON(dir == DMA_NONE); BUG_ON(dir == DMA_NONE);
if (is_swiotlb_buffer(dma_addr)) { if (is_swiotlb_buffer(paddr)) {
do_unmap_single(hwdev, dma_addr, size, dir); do_unmap_single(hwdev, phys_to_virt(paddr), size, dir);
return; return;
} }
if (dir != DMA_FROM_DEVICE) if (dir != DMA_FROM_DEVICE)
return; return;
dma_mark_clean(dma_addr, size); /*
* phys_to_virt doesn't work with hihgmem page but we could
* call dma_mark_clean() with hihgmem page here. However, we
* are fine since dma_mark_clean() is null on POWERPC. We can
* make dma_mark_clean() take a physical address if necessary.
*/
dma_mark_clean(phys_to_virt(paddr), size);
} }
void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr, void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
...@@ -728,19 +692,19 @@ static void ...@@ -728,19 +692,19 @@ static void
swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr, swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir, int target) size_t size, int dir, int target)
{ {
char *dma_addr = swiotlb_bus_to_virt(hwdev, dev_addr); phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);
BUG_ON(dir == DMA_NONE); BUG_ON(dir == DMA_NONE);
if (is_swiotlb_buffer(dma_addr)) { if (is_swiotlb_buffer(paddr)) {
sync_single(hwdev, dma_addr, size, dir, target); sync_single(hwdev, phys_to_virt(paddr), size, dir, target);
return; return;
} }
if (dir != DMA_FROM_DEVICE) if (dir != DMA_FROM_DEVICE)
return; return;
dma_mark_clean(dma_addr, size); dma_mark_clean(phys_to_virt(paddr), size);
} }
void void
...@@ -817,10 +781,10 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems, ...@@ -817,10 +781,10 @@ swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
for_each_sg(sgl, sg, nelems, i) { for_each_sg(sgl, sg, nelems, i) {
phys_addr_t paddr = sg_phys(sg); phys_addr_t paddr = sg_phys(sg);
dma_addr_t dev_addr = swiotlb_phys_to_bus(hwdev, paddr); dma_addr_t dev_addr = phys_to_dma(hwdev, paddr);
if (range_needs_mapping(paddr, sg->length) || if (swiotlb_force ||
address_needs_mapping(hwdev, dev_addr, sg->length)) { !dma_capable(hwdev, dev_addr, sg->length)) {
void *map = map_single(hwdev, sg_phys(sg), void *map = map_single(hwdev, sg_phys(sg),
sg->length, dir); sg->length, dir);
if (!map) { if (!map) {
......
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