diff options
| -rw-r--r-- | arch/alpha/Kconfig | 1 | ||||
| -rw-r--r-- | arch/alpha/include/asm/dma-mapping.h | 79 | ||||
| -rw-r--r-- | arch/alpha/include/asm/pci.h | 125 | ||||
| -rw-r--r-- | arch/alpha/kernel/pci-noop.c | 101 | ||||
| -rw-r--r-- | arch/alpha/kernel/pci_iommu.c | 201 |
5 files changed, 165 insertions, 342 deletions
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 759f49d..75291fd 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -10,6 +10,7 @@ config ALPHA select HAVE_OPROFILE select HAVE_SYSCALL_WRAPPERS select HAVE_PERF_EVENTS + select HAVE_DMA_ATTRS help The Alpha is a 64-bit general-purpose processor designed and marketed by the Digital Equipment Corporation of blessed memory, diff --git a/arch/alpha/include/asm/dma-mapping.h b/arch/alpha/include/asm/dma-mapping.h index f514ede..1bce816 100644 --- a/arch/alpha/include/asm/dma-mapping.h +++ b/arch/alpha/include/asm/dma-mapping.h @@ -1,70 +1,49 @@ #ifndef _ALPHA_DMA_MAPPING_H #define _ALPHA_DMA_MAPPING_H +#include <linux/dma-attrs.h> -#ifdef CONFIG_PCI +extern struct dma_map_ops *dma_ops; -#include <linux/pci.h> +static inline struct dma_map_ops *get_dma_ops(struct device *dev) +{ + return dma_ops; +} -#define dma_map_single(dev, va, size, dir) \ - pci_map_single(alpha_gendev_to_pci(dev), va, size, dir) -#define dma_unmap_single(dev, addr, size, dir) \ - pci_unmap_single(alpha_gendev_to_pci(dev), addr, size, dir) -#define dma_alloc_coherent(dev, size, addr, gfp) \ - __pci_alloc_consistent(alpha_gendev_to_pci(dev), size, addr, gfp) -#define dma_free_coherent(dev, size, va, addr) \ - pci_free_consistent(alpha_gendev_to_pci(dev), size, va, addr) -#define dma_map_page(dev, page, off, size, dir) \ - pci_map_page(alpha_gendev_to_pci(dev), page, off, size, dir) -#define dma_unmap_page(dev, addr, size, dir) \ - pci_unmap_page(alpha_gendev_to_pci(dev), addr, size, dir) -#define dma_map_sg(dev, sg, nents, dir) \ - pci_map_sg(alpha_gendev_to_pci(dev), sg, nents, dir) -#define dma_unmap_sg(dev, sg, nents, dir) \ - pci_unmap_sg(alpha_gendev_to_pci(dev), sg, nents, dir) -#define dma_supported(dev, mask) \ - pci_dma_supported(alpha_gendev_to_pci(dev), mask) -#define dma_mapping_error(dev, addr) \ - pci_dma_mapping_error(alpha_gendev_to_pci(dev), addr) +#include <asm-generic/dma-mapping-common.h> -#else /* no PCI - no IOMMU. */ +static inline void *dma_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp) +{ + return get_dma_ops(dev)->alloc_coherent(dev, size, dma_handle, gfp); +} -#include <asm/io.h> /* for virt_to_phys() */ +static inline void dma_free_coherent(struct device *dev, size_t size, + void *vaddr, dma_addr_t dma_handle) +{ + get_dma_ops(dev)->free_coherent(dev, size, vaddr, dma_handle); +} -struct scatterlist; -void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp); -int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, - enum dma_data_direction direction); +static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return get_dma_ops(dev)->mapping_error(dev, dma_addr); +} -#define dma_free_coherent(dev, size, va, addr) \ - free_pages((unsigned long)va, get_order(size)) -#define dma_supported(dev, mask) (mask < 0x00ffffffUL ? 0 : 1) -#define dma_map_single(dev, va, size, dir) virt_to_phys(va) -#define dma_map_page(dev, page, off, size, dir) (page_to_pa(page) + off) +static inline int dma_supported(struct device *dev, u64 mask) +{ + return get_dma_ops(dev)->dma_supported(dev, mask); +} -#define dma_unmap_single(dev, addr, size, dir) ((void)0) -#define dma_unmap_page(dev, addr, size, dir) ((void)0) -#define dma_unmap_sg(dev, sg, nents, dir) ((void)0) - -#define dma_mapping_error(dev, addr) (0) - -#endif /* !CONFIG_PCI */ +static inline int dma_set_mask(struct device *dev, u64 mask) +{ + return get_dma_ops(dev)->set_dma_mask(dev, mask); +} #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_is_consistent(d, h) (1) -int dma_set_mask(struct device *dev, u64 mask); - -#define dma_sync_single_for_cpu(dev, addr, size, dir) ((void)0) -#define dma_sync_single_for_device(dev, addr, size, dir) ((void)0) -#define dma_sync_sg_for_cpu(dev, sg, nents, dir) ((void)0) -#define dma_sync_sg_for_device(dev, sg, nents, dir) ((void)0) #define dma_cache_sync(dev, va, size, dir) ((void)0) -#define dma_sync_single_range_for_cpu(dev, addr, offset, size, dir) ((void)0) -#define dma_sync_single_range_for_device(dev, addr, offset, size, dir) ((void)0) - #define dma_get_cache_alignment() L1_CACHE_BYTES #endif /* _ALPHA_DMA_MAPPING_H */ diff --git a/arch/alpha/include/asm/pci.h b/arch/alpha/include/asm/pci.h index e1846ba..28d0497 100644 --- a/arch/alpha/include/asm/pci.h +++ b/arch/alpha/include/asm/pci.h @@ -70,128 +70,11 @@ extern inline void pcibios_penalize_isa_irq(int irq, int active) decisions. */ #define PCI_DMA_BUS_IS_PHYS 0 -/* Allocate and map kernel buffer using consistent mode DMA for PCI - device. Returns non-NULL cpu-view pointer to the buffer if - successful and sets *DMA_ADDRP to the pci side dma address as well, - else DMA_ADDRP is undefined. */ - -extern void *__pci_alloc_consistent(struct pci_dev *, size_t, - dma_addr_t *, gfp_t); -static inline void * -pci_alloc_consistent(struct pci_dev *dev, size_t size, dma_addr_t *dma) -{ - return __pci_alloc_consistent(dev, size, dma, GFP_ATOMIC); -} - -/* Free and unmap a consistent DMA buffer. CPU_ADDR and DMA_ADDR must - be values that were returned from pci_alloc_consistent. SIZE must - be the same as what as passed into pci_alloc_consistent. - References to the memory and mappings associated with CPU_ADDR or - DMA_ADDR past this call are illegal. */ - -extern void pci_free_consistent(struct pci_dev *, size_t, void *, dma_addr_t); - -/* Map a single buffer of the indicate size for PCI DMA in streaming mode. - The 32-bit PCI bus mastering 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 *, void *, size_t, int); - -/* Likewise, but for a page instead of an address. */ -extern dma_addr_t pci_map_page(struct pci_dev *, struct page *, - unsigned long, size_t, int); - -/* Test for pci_map_single or pci_map_page having generated an error. */ - -static inline int -pci_dma_mapping_error(struct pci_dev *pdev, dma_addr_t dma_addr) -{ - return dma_addr == 0; -} - -/* 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 *, dma_addr_t, size_t, int); -extern void pci_unmap_page(struct pci_dev *, dma_addr_t, size_t, int); - -/* Map a set of buffers described by scatterlist in streaming mode for - PCI DMA. This is the scatter-gather version of the above - pci_map_single interface. Here the scatter gather list elements - are each tagged with the appropriate PCI 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 *, struct scatterlist *, int, int); - -/* 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 *, struct scatterlist *, int, int); - -/* Make physical memory consistent for a single streaming mode DMA - translation after a transfer and device currently has ownership - of the buffer. - - 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. */ - -static inline void -pci_dma_sync_single_for_cpu(struct pci_dev *dev, dma_addr_t dma_addr, - long size, int direction) -{ - /* Nothing to do. */ -} - -static inline void -pci_dma_sync_single_for_device(struct pci_dev *dev, dma_addr_t dma_addr, - size_t size, int direction) -{ - /* Nothing to do. */ -} - -/* 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. */ - -static inline void -pci_dma_sync_sg_for_cpu(struct pci_dev *dev, struct scatterlist *sg, - int nents, int direction) -{ - /* Nothing to do. */ -} - -static inline void -pci_dma_sync_sg_for_device(struct pci_dev *dev, struct scatterlist *sg, - int nents, int direction) -{ - /* Nothing to do. */ -} - -/* 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. */ +#ifdef CONFIG_PCI -extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask); +/* implement the pci_ DMA API in terms of the generic device dma_ one */ +#include <asm-generic/pci-dma-compat.h> -#ifdef CONFIG_PCI static inline void pci_dma_burst_advice(struct pci_dev *pdev, enum pci_dma_burst_strategy *strat, unsigned long *strategy_parameter) @@ -230,8 +113,6 @@ static inline int pci_proc_domain(struct pci_bus *bus) return hose->need_domain_info; } -struct pci_dev *alpha_gendev_to_pci(struct device *dev); - #endif /* __KERNEL__ */ /* Values for the `which' argument to sys_pciconfig_iobase. */ diff --git a/arch/alpha/kernel/pci-noop.c b/arch/alpha/kernel/pci-noop.c index c19a376..823a540 100644 --- a/arch/alpha/kernel/pci-noop.c +++ b/arch/alpha/kernel/pci-noop.c @@ -106,58 +106,8 @@ sys_pciconfig_write(unsigned long bus, unsigned long dfn, return -ENODEV; } -/* Stubs for the routines in pci_iommu.c: */ - -void * -__pci_alloc_consistent(struct pci_dev *pdev, size_t size, - dma_addr_t *dma_addrp, gfp_t gfp) -{ - return NULL; -} - -void -pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr, - dma_addr_t dma_addr) -{ -} - -dma_addr_t -pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size, - int direction) -{ - return (dma_addr_t) 0; -} - -void -pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size, - int direction) -{ -} - -int -pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, - int direction) -{ - return 0; -} - -void -pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, - int direction) -{ -} - -int -pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask) -{ - return 0; -} - -/* Generic DMA mapping functions: */ - -void * -dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp) +static void *alpha_noop_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp) { void *ret; @@ -171,11 +121,22 @@ dma_alloc_coherent(struct device *dev, size_t size, return ret; } -EXPORT_SYMBOL(dma_alloc_coherent); +static void alpha_noop_free_coherent(struct device *dev, size_t size, + void *cpu_addr, dma_addr_t dma_addr) +{ + free_pages((unsigned long)cpu_addr, get_order(size)); +} + +static dma_addr_t alpha_noop_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir, + struct dma_attrs *attrs) +{ + return page_to_pa(page) + offset; +} -int -dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents, - enum dma_data_direction direction) +static int alpha_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents, + enum dma_data_direction dir, struct dma_attrs *attrs) { int i; struct scatterlist *sg; @@ -192,19 +153,37 @@ dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents, return nents; } -EXPORT_SYMBOL(dma_map_sg); +static int alpha_noop_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + return 0; +} + +static int alpha_noop_supported(struct device *dev, u64 mask) +{ + return mask < 0x00ffffffUL ? 0 : 1; +} -int -dma_set_mask(struct device *dev, u64 mask) +static int alpha_noop_set_mask(struct device *dev, u64 mask) { if (!dev->dma_mask || !dma_supported(dev, mask)) return -EIO; *dev->dma_mask = mask; - return 0; } -EXPORT_SYMBOL(dma_set_mask); + +struct dma_map_ops alpha_noop_ops = { + .alloc_coherent = alpha_noop_alloc_coherent, + .free_coherent = alpha_noop_free_coherent, + .map_page = alpha_noop_map_page, + .map_sg = alpha_noop_map_sg, + .mapping_error = alpha_noop_mapping_error, + .dma_supported = alpha_noop_supported, + .set_dma_mask = alpha_noop_set_mask, +}; + +struct dma_map_ops *dma_ops = &alpha_noop_ops; +EXPORT_SYMBOL(dma_ops); void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c index 8449504..ce9e54c 100644 --- a/arch/alpha/kernel/pci_iommu.c +++ b/arch/alpha/kernel/pci_iommu.c @@ -216,10 +216,30 @@ iommu_arena_free(struct pci_iommu_arena *arena, long ofs, long n) for (i = 0; i < n; ++i) p[i] = 0; } - -/* True if the machine supports DAC addressing, and DEV can - make use of it given MASK. */ -static int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask); + +/* + * True if the machine supports DAC addressing, and DEV can + * make use of it given MASK. + */ +static int pci_dac_dma_supported(struct pci_dev *dev, u64 mask) +{ + dma64_addr_t dac_offset = alpha_mv.pci_dac_offset; + int ok = 1; + + /* If this is not set, the machine doesn't support DAC at all. */ + if (dac_offset == 0) + ok = 0; + + /* The device has to be able to address our DAC bit. */ + if ((dac_offset & dev->dma_mask) != dac_offset) + ok = 0; + + /* If both conditions above are met, we are fine. */ + DBGA("pci_dac_dma_supported %s from %p\n", + ok ? "yes" : "no", __builtin_return_address(0)); + + return ok; +} /* Map a single buffer of the indicated size for PCI DMA in streaming mode. The 32-bit PCI bus mastering address to use is returned. @@ -301,23 +321,36 @@ pci_map_single_1(struct pci_dev *pdev, void *cpu_addr, size_t size, return ret; } -dma_addr_t -pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size, int dir) +/* Helper for generic DMA-mapping functions. */ +static struct pci_dev *alpha_gendev_to_pci(struct device *dev) { - int dac_allowed; + if (dev && dev->bus == &pci_bus_type) + return to_pci_dev(dev); - if (dir == PCI_DMA_NONE) - BUG(); + /* Assume that non-PCI devices asking for DMA are either ISA or EISA, + BUG() otherwise. */ + BUG_ON(!isa_bridge); - dac_allowed = pdev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0; - return pci_map_single_1(pdev, cpu_addr, size, dac_allowed); + /* Assume non-busmaster ISA DMA when dma_mask is not set (the ISA + bridge is bus master then). */ + if (!dev || !dev->dma_mask || !*dev->dma_mask) + return isa_bridge; + + /* For EISA bus masters, return isa_bridge (it might have smaller + dma_mask due to wiring limitations). */ + if (*dev->dma_mask >= isa_bridge->dma_mask) + return isa_bridge; + + /* This assumes ISA bus master with dma_mask 0xffffff. */ + return NULL; } -EXPORT_SYMBOL(pci_map_single); -dma_addr_t -pci_map_page(struct pci_dev *pdev, struct page *page, unsigned long offset, - size_t size, int dir) +static dma_addr_t alpha_pci_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir, + struct dma_attrs *attrs) { + struct pci_dev *pdev = alpha_gendev_to_pci(dev); int dac_allowed; if (dir == PCI_DMA_NONE) @@ -327,7 +360,6 @@ pci_map_page(struct pci_dev *pdev, struct page *page, unsigned long offset, return pci_map_single_1(pdev, (char *)page_address(page) + offset, size, dac_allowed); } -EXPORT_SYMBOL(pci_map_page); /* Unmap a single streaming mode DMA translation. The DMA_ADDR and SIZE must match what was provided for in a previous pci_map_single @@ -335,16 +367,17 @@ EXPORT_SYMBOL(pci_map_page); the cpu to the buffer are guaranteed to see whatever the device wrote there. */ -void -pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size, - int direction) +static void alpha_pci_unmap_page(struct device *dev, dma_addr_t dma_addr, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs) { unsigned long flags; + struct pci_dev *pdev = alpha_gendev_to_pci(dev); struct pci_controller *hose = pdev ? pdev->sysdata : pci_isa_hose; struct pci_iommu_arena *arena; long dma_ofs, npages; - if (direction == PCI_DMA_NONE) + if (dir == PCI_DMA_NONE) BUG(); if (dma_addr >= __direct_map_base @@ -393,25 +426,16 @@ pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size, DBGA2("pci_unmap_single: sg [%llx,%zx] np %ld from %p\n", dma_addr, size, npages, __builtin_return_address(0)); } -EXPORT_SYMBOL(pci_unmap_single); - -void -pci_unmap_page(struct pci_dev *pdev, dma_addr_t dma_addr, - size_t size, int direction) -{ - pci_unmap_single(pdev, dma_addr, size, direction); -} -EXPORT_SYMBOL(pci_unmap_page); /* Allocate and map kernel buffer using consistent mode DMA for PCI device. Returns non-NULL cpu-view pointer to the buffer if successful and sets *DMA_ADDRP to the pci side dma address as well, else DMA_ADDRP is undefined. */ -void * -__pci_alloc_consistent(struct pci_dev *pdev, size_t size, - dma_addr_t *dma_addrp, gfp_t gfp) +static void *alpha_pci_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_addrp, gfp_t gfp) { + struct pci_dev *pdev = alpha_gendev_to_pci(dev); void *cpu_addr; long order = get_order(size); @@ -439,13 +463,12 @@ try_again: gfp |= GFP_DMA; goto try_again; } - + DBGA2("pci_alloc_consistent: %zx -> [%p,%llx] from %p\n", size, cpu_addr, *dma_addrp, __builtin_return_address(0)); return cpu_addr; } -EXPORT_SYMBOL(__pci_alloc_consistent); /* Free and unmap a consistent DMA buffer. CPU_ADDR and DMA_ADDR must be values that were returned from pci_alloc_consistent. SIZE must @@ -453,17 +476,16 @@ EXPORT_SYMBOL(__pci_alloc_consistent); References to the memory and mappings associated with CPU_ADDR or DMA_ADDR past this call are illegal. */ -void -pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr, - dma_addr_t dma_addr) +static void alpha_pci_free_coherent(struct device *dev, size_t size, + void *cpu_addr, dma_addr_t dma_addr) { + struct pci_dev *pdev = alpha_gendev_to_pci(dev); pci_unmap_single(pdev, dma_addr, size, PCI_DMA_BIDIRECTIONAL); free_pages((unsigned long)cpu_addr, get_order(size)); DBGA2("pci_free_consistent: [%llx,%zx] from %p\n", dma_addr, size, __builtin_return_address(0)); } -EXPORT_SYMBOL(pci_free_consistent); /* Classify the elements of the scatterlist. Write dma_address of each element with: @@ -626,23 +648,21 @@ sg_fill(struct device *dev, struct scatterlist *leader, struct scatterlist *end, return 1; } -int -pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, - int direction) +static int alpha_pci_map_sg(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir, + struct dma_attrs *attrs) { + struct pci_dev *pdev = alpha_gendev_to_pci(dev); struct scatterlist *start, *end, *out; struct pci_controller *hose; struct pci_iommu_arena *arena; dma_addr_t max_dma; int dac_allowed; - struct device *dev; - if (direction == PCI_DMA_NONE) + if (dir == PCI_DMA_NONE) BUG(); - dac_allowed = pdev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0; - - dev = pdev ? &pdev->dev : NULL; + dac_allowed = dev ? pci_dac_dma_supported(pdev, pdev->dma_mask) : 0; /* Fast path single entry scatterlists. */ if (nents == 1) { @@ -699,19 +719,19 @@ pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, /* Some allocation failed while mapping the scatterlist entries. Unmap them now. */ if (out > start) - pci_unmap_sg(pdev, start, out - start, direction); + pci_unmap_sg(pdev, start, out - start, dir); return 0; } -EXPORT_SYMBOL(pci_map_sg); /* Unmap a set of streaming mode DMA translations. Again, cpu read rules concerning calls here are the same as for pci_unmap_single() above. */ -void -pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, - int direction) +static void alpha_pci_unmap_sg(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir, + struct dma_attrs *attrs) { + struct pci_dev *pdev = alpha_gendev_to_pci(dev); unsigned long flags; struct pci_controller *hose; struct pci_iommu_arena *arena; @@ -719,7 +739,7 @@ pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, dma_addr_t max_dma; dma_addr_t fbeg, fend; - if (direction == PCI_DMA_NONE) + if (dir == PCI_DMA_NONE) BUG(); if (! alpha_mv.mv_pci_tbi) @@ -783,15 +803,13 @@ pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, DBGA("pci_unmap_sg: %ld entries\n", nents - (end - sg)); } -EXPORT_SYMBOL(pci_unmap_sg); - /* Return whether the given PCI device DMA address mask can be supported properly. */ -int -pci_dma_supported(struct pci_dev *pdev, u64 mask) +static int alpha_pci_supported(struct device *dev, u64 mask) { + struct pci_dev *pdev = alpha_gendev_to_pci(dev); struct pci_controller *hose; struct pci_iommu_arena *arena; @@ -818,7 +836,6 @@ pci_dma_supported(struct pci_dev *pdev, u64 mask) return 0; } -EXPORT_SYMBOL(pci_dma_supported); /* @@ -918,66 +935,32 @@ iommu_unbind(struct pci_iommu_arena *arena, long pg_start, long pg_count) return 0; } -/* True if the machine supports DAC addressing, and DEV can - make use of it given MASK. */ - -static int -pci_dac_dma_supported(struct pci_dev *dev, u64 mask) -{ - dma64_addr_t dac_offset = alpha_mv.pci_dac_offset; - int ok = 1; - - /* If this is not set, the machine doesn't support DAC at all. */ - if (dac_offset == 0) - ok = 0; - - /* The device has to be able to address our DAC bit. */ - if ((dac_offset & dev->dma_mask) != dac_offset) - ok = 0; - - /* If both conditions above are met, we are fine. */ - DBGA("pci_dac_dma_supported %s from %p\n", - ok ? "yes" : "no", __builtin_return_address(0)); - - return ok; -} - -/* Helper for generic DMA-mapping functions. */ - -struct pci_dev * -alpha_gendev_to_pci(struct device *dev) +static int alpha_pci_mapping_error(struct device *dev, dma_addr_t dma_addr) { - if (dev && dev->bus == &pci_bus_type) - return to_pci_dev(dev); - - /* Assume that non-PCI devices asking for DMA are either ISA or EISA, - BUG() otherwise. */ - BUG_ON(!isa_bridge); - - /* Assume non-busmaster ISA DMA when dma_mask is not set (the ISA - bridge is bus master then). */ - if (!dev || !dev->dma_mask || !*dev->dma_mask) - return isa_bridge; - - /* For EISA bus masters, return isa_bridge (it might have smaller - dma_mask due to wiring limitations). */ - if (*dev->dma_mask >= isa_bridge->dma_mask) - return isa_bridge; - - /* This assumes ISA bus master with dma_mask 0xffffff. */ - return NULL; + return dma_addr == 0; } -EXPORT_SYMBOL(alpha_gendev_to_pci); -int -dma_set_mask(struct device *dev, u64 mask) +static int alpha_pci_set_mask(struct device *dev, u64 mask) { if (!dev->dma_mask || !pci_dma_supported(alpha_gendev_to_pci(dev), mask)) return -EIO; *dev->dma_mask = mask; - return 0; } -EXPORT_SYMBOL(dma_set_mask); + +struct dma_map_ops alpha_pci_ops = { + .alloc_coherent = alpha_pci_alloc_coherent, + .free_coherent = alpha_pci_free_coherent, + .map_page = alpha_pci_map_page, + .unmap_page = alpha_pci_unmap_page, + .map_sg = alpha_pci_map_sg, + .unmap_sg = alpha_pci_unmap_sg, + .mapping_error = alpha_pci_mapping_error, + .dma_supported = alpha_pci_supported, + .set_dma_mask = alpha_pci_set_mask, +}; + +struct dma_map_ops *dma_ops = &alpha_pci_ops; +EXPORT_SYMBOL(dma_ops); |