diff options
| -rw-r--r-- | Documentation/DMA-mapping.txt | 103 | ||||
| -rw-r--r-- | arch/alpha/kernel/pci_iommu.c | 32 | ||||
| -rw-r--r-- | arch/mips/pci/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/pci/pci-dac.c | 79 | ||||
| -rw-r--r-- | arch/x86_64/kernel/pci-dma.c | 3 | ||||
| -rw-r--r-- | include/asm-alpha/pci.h | 24 | ||||
| -rw-r--r-- | include/asm-arm/pci.h | 5 | ||||
| -rw-r--r-- | include/asm-cris/pci.h | 32 | ||||
| -rw-r--r-- | include/asm-frv/pci.h | 3 | ||||
| -rw-r--r-- | include/asm-i386/pci.h | 33 | ||||
| -rw-r--r-- | include/asm-ia64/pci.h | 8 | ||||
| -rw-r--r-- | include/asm-m68knommu/pci.h | 6 | ||||
| -rw-r--r-- | include/asm-mips/pci.h | 14 | ||||
| -rw-r--r-- | include/asm-parisc/pci.h | 3 | ||||
| -rw-r--r-- | include/asm-powerpc/dma-mapping.h | 1 | ||||
| -rw-r--r-- | include/asm-powerpc/pci.h | 18 | ||||
| -rw-r--r-- | include/asm-ppc/pci.h | 6 | ||||
| -rw-r--r-- | include/asm-sh/pci.h | 5 | ||||
| -rw-r--r-- | include/asm-sh64/pci.h | 5 | ||||
| -rw-r--r-- | include/asm-sparc/pci.h | 2 | ||||
| -rw-r--r-- | include/asm-sparc64/pci.h | 43 | ||||
| -rw-r--r-- | include/asm-v850/rte_cb.h | 1 | ||||
| -rw-r--r-- | include/asm-x86_64/pci.h | 40 | ||||
| -rw-r--r-- | include/asm-xtensa/pci.h | 3 |
24 files changed, 7 insertions, 464 deletions
diff --git a/Documentation/DMA-mapping.txt b/Documentation/DMA-mapping.txt index 028614cdd062..e07f2530326b 100644 --- a/Documentation/DMA-mapping.txt +++ b/Documentation/DMA-mapping.txt @@ -664,109 +664,6 @@ It is that simple. Well, not for some odd devices. See the next section for information about that. - DAC Addressing for Address Space Hungry Devices - -There exists a class of devices which do not mesh well with the PCI -DMA mapping API. By definition these "mappings" are a finite -resource. The number of total available mappings per bus is platform -specific, but there will always be a reasonable amount. - -What is "reasonable"? Reasonable means that networking and block I/O -devices need not worry about using too many mappings. - -As an example of a problematic device, consider compute cluster cards. -They can potentially need to access gigabytes of memory at once via -DMA. Dynamic mappings are unsuitable for this kind of access pattern. - -To this end we've provided a small API by which a device driver -may use DAC cycles to directly address all of physical memory. -Not all platforms support this, but most do. It is easy to determine -whether the platform will work properly at probe time. - -First, understand that there may be a SEVERE performance penalty for -using these interfaces on some platforms. Therefore, you MUST only -use these interfaces if it is absolutely required. %99 of devices can -use the normal APIs without any problems. - -Note that for streaming type mappings you must either use these -interfaces, or the dynamic mapping interfaces above. You may not mix -usage of both for the same device. Such an act is illegal and is -guaranteed to put a banana in your tailpipe. - -However, consistent mappings may in fact be used in conjunction with -these interfaces. Remember that, as defined, consistent mappings are -always going to be SAC addressable. - -The first thing your driver needs to do is query the PCI platform -layer if it is capable of handling your devices DAC addressing -capabilities: - - int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask); - -You may not use the following interfaces if this routine fails. - -Next, DMA addresses using this API are kept track of using the -dma64_addr_t type. It is guaranteed to be big enough to hold any -DAC address the platform layer will give to you from the following -routines. If you have consistent mappings as well, you still -use plain dma_addr_t to keep track of those. - -All mappings obtained here will be direct. The mappings are not -translated, and this is the purpose of this dialect of the DMA API. - -All routines work with page/offset pairs. This is the _ONLY_ way to -portably refer to any piece of memory. If you have a cpu pointer -(which may be validly DMA'd too) you may easily obtain the page -and offset using something like this: - - struct page *page = virt_to_page(ptr); - unsigned long offset = offset_in_page(ptr); - -Here are the interfaces: - - dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev, - struct page *page, - unsigned long offset, - int direction); - -The DAC address for the tuple PAGE/OFFSET are returned. The direction -argument is the same as for pci_{map,unmap}_single(). The same rules -for cpu/device access apply here as for the streaming mapping -interfaces. To reiterate: - - The cpu may touch the buffer before pci_dac_page_to_dma. - The device may touch the buffer after pci_dac_page_to_dma - is made, but the cpu may NOT. - -When the DMA transfer is complete, invoke: - - void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, - dma64_addr_t dma_addr, - size_t len, int direction); - -This must be done before the CPU looks at the buffer again. -This interface behaves identically to pci_dma_sync_{single,sg}_for_cpu(). - -And likewise, if you wish to let the device get back at the buffer after -the cpu has read/written it, invoke: - - void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, - dma64_addr_t dma_addr, - size_t len, int direction); - -before letting the device access the DMA area again. - -If you need to get back to the PAGE/OFFSET tuple from a dma64_addr_t -the following interfaces are provided: - - struct page *pci_dac_dma_to_page(struct pci_dev *pdev, - dma64_addr_t dma_addr); - unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev, - dma64_addr_t dma_addr); - -This is possible with the DAC interfaces purely because they are -not translated in any way. - Optimizing Unmap State Space Consumption On many platforms, pci_unmap_{single,page}() is simply a nop. diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c index 28c84e55feb9..6b07f89a72c7 100644 --- a/arch/alpha/kernel/pci_iommu.c +++ b/arch/alpha/kernel/pci_iommu.c @@ -207,6 +207,10 @@ iommu_arena_free(struct pci_iommu_arena *arena, long ofs, long n) 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); + /* 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. Once the device is given the dma address, the device owns this memory @@ -897,7 +901,7 @@ iommu_unbind(struct pci_iommu_arena *arena, long pg_start, long pg_count) /* True if the machine supports DAC addressing, and DEV can make use of it given MASK. */ -int +static int pci_dac_dma_supported(struct pci_dev *dev, u64 mask) { dma64_addr_t dac_offset = alpha_mv.pci_dac_offset; @@ -917,32 +921,6 @@ pci_dac_dma_supported(struct pci_dev *dev, u64 mask) return ok; } -EXPORT_SYMBOL(pci_dac_dma_supported); - -dma64_addr_t -pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, - unsigned long offset, int direction) -{ - return (alpha_mv.pci_dac_offset - + __pa(page_address(page)) - + (dma64_addr_t) offset); -} -EXPORT_SYMBOL(pci_dac_page_to_dma); - -struct page * -pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr) -{ - unsigned long paddr = (dma_addr & PAGE_MASK) - alpha_mv.pci_dac_offset; - return virt_to_page(__va(paddr)); -} -EXPORT_SYMBOL(pci_dac_dma_to_page); - -unsigned long -pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr) -{ - return (dma_addr & ~PAGE_MASK); -} -EXPORT_SYMBOL(pci_dac_dma_to_offset); /* Helper for generic DMA-mapping functions. */ diff --git a/arch/mips/pci/Makefile b/arch/mips/pci/Makefile index f26ede001a0b..c58bd3d036f4 100644 --- a/arch/mips/pci/Makefile +++ b/arch/mips/pci/Makefile @@ -2,7 +2,7 @@ # Makefile for the PCI specific kernel interface routines under Linux. # -obj-y += pci.o pci-dac.o +obj-y += pci.o # # PCI bus host bridge specific code diff --git a/arch/mips/pci/pci-dac.c b/arch/mips/pci/pci-dac.c deleted file mode 100644 index 0f0ea1b7d4dd..000000000000 --- a/arch/mips/pci/pci-dac.c +++ /dev/null @@ -1,79 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com> - * Copyright (C) 2000, 2001, 06 Ralf Baechle <ralf@linux-mips.org> - * swiped from i386, and cloned for MIPS by Geert, polished by Ralf. - */ - -#include <linux/types.h> -#include <linux/dma-mapping.h> -#include <linux/mm.h> -#include <linux/module.h> -#include <linux/string.h> - -#include <asm/cache.h> -#include <asm/io.h> - -#include <dma-coherence.h> - -#include <linux/pci.h> - -dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev, - struct page *page, unsigned long offset, int direction) -{ - struct device *dev = &pdev->dev; - - BUG_ON(direction == DMA_NONE); - - if (!plat_device_is_coherent(dev)) { - unsigned long addr; - - addr = (unsigned long) page_address(page) + offset; - dma_cache_wback_inv(addr, PAGE_SIZE); - } - - return plat_map_dma_mem_page(dev, page) + offset; -} - -EXPORT_SYMBOL(pci_dac_page_to_dma); - -struct page *pci_dac_dma_to_page(struct pci_dev *pdev, - dma64_addr_t dma_addr) -{ - return pfn_to_page(plat_dma_addr_to_phys(dma_addr) >> PAGE_SHIFT); -} - -EXPORT_SYMBOL(pci_dac_dma_to_page); - -unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev, - dma64_addr_t dma_addr) -{ - return dma_addr & ~PAGE_MASK; -} - -EXPORT_SYMBOL(pci_dac_dma_to_offset); - -void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, - dma64_addr_t dma_addr, size_t len, int direction) -{ - BUG_ON(direction == PCI_DMA_NONE); - - if (!plat_device_is_coherent(&pdev->dev)) - dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len); -} - -EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu); - -void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, - dma64_addr_t dma_addr, size_t len, int direction) -{ - BUG_ON(direction == PCI_DMA_NONE); - - if (!plat_device_is_coherent(&pdev->dev)) - dma_cache_wback_inv(dma_addr + PAGE_OFFSET, len); -} - -EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device); diff --git a/arch/x86_64/kernel/pci-dma.c b/arch/x86_64/kernel/pci-dma.c index 9f80aad3fe2d..90f6315d02d4 100644 --- a/arch/x86_64/kernel/pci-dma.c +++ b/arch/x86_64/kernel/pci-dma.c @@ -22,8 +22,7 @@ EXPORT_SYMBOL(bad_dma_address); int iommu_bio_merge __read_mostly = 0; EXPORT_SYMBOL(iommu_bio_merge); -int iommu_sac_force __read_mostly = 0; -EXPORT_SYMBOL(iommu_sac_force); +static int iommu_sac_force __read_mostly = 0; int no_iommu __read_mostly; #ifdef CONFIG_IOMMU_DEBUG diff --git a/include/asm-alpha/pci.h b/include/asm-alpha/pci.h index 635d6f2b0b03..30ee7669b19f 100644 --- a/include/asm-alpha/pci.h +++ b/include/asm-alpha/pci.h @@ -199,30 +199,6 @@ pci_dma_sync_sg_for_device(struct pci_dev *dev, struct scatterlist *sg, extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask); -/* True if the machine supports DAC addressing, and DEV can - make use of it given MASK. */ -extern int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask); - -/* Convert to/from DAC dma address and struct page. */ -extern dma64_addr_t pci_dac_page_to_dma(struct pci_dev *, struct page *, - unsigned long, int); -extern struct page *pci_dac_dma_to_page(struct pci_dev *, dma64_addr_t); -extern unsigned long pci_dac_dma_to_offset(struct pci_dev *, dma64_addr_t); - -static inline void -pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, - size_t len, int direction) -{ - /* Nothing to do. */ -} - -static inline void -pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, - size_t len, int direction) -{ - /* Nothing to do. */ -} - #ifdef CONFIG_PCI static inline void pci_dma_burst_advice(struct pci_dev *pdev, enum pci_dma_burst_strategy *strat, diff --git a/include/asm-arm/pci.h b/include/asm-arm/pci.h index 9299a3c1ac37..ed3f898191f4 100644 --- a/include/asm-arm/pci.h +++ b/include/asm-arm/pci.h @@ -26,11 +26,6 @@ static inline void pcibios_penalize_isa_irq(int irq, int active) #define PCI_DMA_BUS_IS_PHYS (0) /* - * We don't support DAC DMA cycles. - */ -#define pci_dac_dma_supported(pci_dev, mask) (0) - -/* * Whether pci_unmap_{single,page} is a nop depends upon the * configuration. */ diff --git a/include/asm-cris/pci.h b/include/asm-cris/pci.h index 5f1986ef7db1..730ce40fdd0f 100644 --- a/include/asm-cris/pci.h +++ b/include/asm-cris/pci.h @@ -52,38 +52,6 @@ struct pci_dev; #define pci_unmap_len(PTR, LEN_NAME) (0) #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0) -/* This is always fine. */ -#define pci_dac_dma_supported(pci_dev, mask) (1) - -static inline dma64_addr_t -pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction) -{ - return ((dma64_addr_t) page_to_phys(page) + - (dma64_addr_t) offset); -} - -static inline struct page * -pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr) -{ - return pfn_to_page(dma_addr >> PAGE_SHIFT); -} - -static inline unsigned long -pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr) -{ - return (dma_addr & ~PAGE_MASK); -} - -static inline void -pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction) -{ -} - -static inline void -pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction) -{ -} - #define HAVE_PCI_MMAP extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, enum pci_mmap_state mmap_state, int write_combine); diff --git a/include/asm-frv/pci.h b/include/asm-frv/pci.h index 3aee08c5a44f..585d9b49949a 100644 --- a/include/asm-frv/pci.h +++ b/include/asm-frv/pci.h @@ -40,9 +40,6 @@ extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, extern void pci_free_consistent(struct pci_dev *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle); -/* This is always fine. */ -#define pci_dac_dma_supported(pci_dev, mask) (1) - /* Return the index of the PCI controller for device PDEV. */ #define pci_controller_num(PDEV) (0) diff --git a/include/asm-i386/pci.h b/include/asm-i386/pci.h index b974bd8ce9c6..392d3fe5d45e 100644 --- a/include/asm-i386/pci.h +++ b/include/asm-i386/pci.h @@ -56,39 +56,6 @@ struct pci_dev; #define pci_unmap_len(PTR, LEN_NAME) (0) #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0) -/* This is always fine. */ -#define pci_dac_dma_supported(pci_dev, mask) (1) - -static inline dma64_addr_t -pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction) -{ - return ((dma64_addr_t) page_to_phys(page) + - (dma64_addr_t) offset); -} - -static inline struct page * -pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr) -{ - return pfn_to_page(dma_addr >> PAGE_SHIFT); -} - -static inline unsigned long -pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr) -{ - return (dma_addr & ~PAGE_MASK); -} - -static inline void -pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction) -{ -} - -static inline void -pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction) -{ - flush_write_buffers(); -} - #define HAVE_PCI_MMAP extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, enum pci_mmap_state mmap_state, int write_combine); diff --git a/include/asm-ia64/pci.h b/include/asm-ia64/pci.h index 26b69280f6c7..3523d2584598 100644 --- a/include/asm-ia64/pci.h +++ b/include/asm-ia64/pci.h @@ -71,14 +71,6 @@ pcibios_penalize_isa_irq (int irq, int active) #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \ (((PTR)->LEN_NAME) = (VAL)) -/* The ia64 platform always supports 64-bit addressing. */ -#define pci_dac_dma_supported(pci_dev, mask) (1) -#define pci_dac_page_to_dma(dev,pg,off,dir) ((dma_addr_t) page_to_bus(pg) + (off)) -#define pci_dac_dma_to_page(dev,dma_addr) (virt_to_page(bus_to_virt(dma_addr))) -#define pci_dac_dma_to_offset(dev,dma_addr) offset_in_page(dma_addr) -#define pci_dac_dma_sync_single_for_cpu(dev,dma_addr,len,dir) do { } while (0) -#define pci_dac_dma_sync_single_for_device(dev,dma_addr,len,dir) do { mb(); } while (0) - #ifdef CONFIG_PCI static inline void pci_dma_burst_advice(struct pci_dev *pdev, enum pci_dma_burst_strategy *strat, diff --git a/include/asm-m68knommu/pci.h b/include/asm-m68knommu/pci.h index a99ce768f4a6..a13f3cc87451 100644 --- a/include/asm-m68knommu/pci.h +++ b/include/asm-m68knommu/pci.h @@ -24,12 +24,6 @@ static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask) return 1; } -/* - * Not supporting more than 32-bit PCI bus addresses now, but - * must satisfy references to this function. Change if needed. - */ -#define pci_dac_dma_supported(pci_dev, mask) (0) - #endif /* CONFIG_COMEMPCI */ #endif /* M68KNOMMU_PCI_H */ diff --git a/include/asm-mips/pci.h b/include/asm-mips/pci.h index 6e8c5540bd27..4fcc185cb2d1 100644 --- a/include/asm-mips/pci.h +++ b/include/asm-mips/pci.h @@ -121,20 +121,6 @@ extern unsigned int PCI_DMA_BUS_IS_PHYS; #endif /* CONFIG_DMA_NEED_PCI_MAP_STATE */ -/* This is always fine. */ -#define pci_dac_dma_supported(pci_dev, mask) (1) - -extern dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev, - struct page *page, unsigned long offset, int direction); -extern struct page *pci_dac_dma_to_page(struct pci_dev *pdev, - dma64_addr_t dma_addr); -extern unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev, - dma64_addr_t dma_addr); -extern void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, - dma64_addr_t dma_addr, size_t len, int direction); -extern void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, - dma64_addr_t dma_addr, size_t len, int direction); - #ifdef CONFIG_PCI static inline void pci_dma_burst_advice(struct pci_dev *pdev, enum pci_dma_burst_strategy *strat, diff --git a/include/asm-parisc/pci.h b/include/asm-parisc/pci.h index c331d49e4584..61fbd57a8323 100644 --- a/include/asm-parisc/pci.h +++ b/include/asm-parisc/pci.h @@ -238,9 +238,6 @@ extern inline void pcibios_register_hba(struct pci_hba_data *x) #define PCIBIOS_MIN_IO 0x10 #define PCIBIOS_MIN_MEM 0x1000 /* NBPG - but pci/setup-res.c dies */ -/* Don't support DAC yet. */ -#define pci_dac_dma_supported(pci_dev, mask) (0) - /* export the pci_ DMA API in terms of the dma_ one */ #include <asm-generic/pci-dma-compat.h> diff --git a/include/asm-powerpc/dma-mapping.h b/include/asm-powerpc/dma-mapping.h index a19a6f1a1cf1..f6bd804d9090 100644 --- a/include/asm-powerpc/dma-mapping.h +++ b/include/asm-powerpc/dma-mapping.h @@ -61,7 +61,6 @@ struct dma_mapping_ops { void (*unmap_sg)(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction direction); int (*dma_supported)(struct device *dev, u64 mask); - int (*dac_dma_supported)(struct device *dev, u64 mask); int (*set_dma_mask)(struct device *dev, u64 dma_mask); }; diff --git a/include/asm-powerpc/pci.h b/include/asm-powerpc/pci.h index b36a284bedf3..e16e7bc9ab5c 100644 --- a/include/asm-powerpc/pci.h +++ b/include/asm-powerpc/pci.h @@ -74,18 +74,6 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) extern void set_pci_dma_ops(struct dma_mapping_ops *dma_ops); extern struct dma_mapping_ops *get_pci_dma_ops(void); -/* For DAC DMA, we currently don't support it by default, but - * we let 64-bit platforms override this. - */ -static inline int pci_dac_dma_supported(struct pci_dev *hwdev,u64 mask) -{ - struct dma_mapping_ops *d = get_pci_dma_ops(); - - if (d && d->dac_dma_supported) - return d->dac_dma_supported(&hwdev->dev, mask); - return 0; -} - static inline void pci_dma_burst_advice(struct pci_dev *pdev, enum pci_dma_burst_strategy *strat, unsigned long *strategy_parameter) @@ -124,12 +112,6 @@ static inline void pci_dma_burst_advice(struct pci_dev *pdev, } #endif -/* - * At present there are very few 32-bit PPC machines that can have - * memory above the 4GB point, and we don't support that. - */ -#define pci_dac_dma_supported(pci_dev, mask) (0) - /* Return the index of the PCI controller for device PDEV. */ #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index diff --git a/include/asm-ppc/pci.h b/include/asm-ppc/pci.h index 0a66a6f1059a..d2442cd72a59 100644 --- a/include/asm-ppc/pci.h +++ b/include/asm-ppc/pci.h @@ -102,12 +102,6 @@ static inline void pci_dma_burst_advice(struct pci_dev *pdev, } #endif -/* - * At present there are very few 32-bit PPC machines that can have - * memory above the 4GB point, and we don't support that. - */ -#define pci_dac_dma_supported(pci_dev, mask) (0) - /* Return the index of the PCI controller for device PDEV. */ #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index diff --git a/include/asm-sh/pci.h b/include/asm-sh/pci.h index 6f741f3a5d45..2757ce096ff7 100644 --- a/include/asm-sh/pci.h +++ b/include/asm-sh/pci.h @@ -110,11 +110,6 @@ static inline void pcibios_penalize_isa_irq(int irq, int active) #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0) #endif -/* Not supporting more than 32-bit PCI bus addresses now, but - * must satisfy references to this function. Change if needed. - */ -#define pci_dac_dma_supported(pci_dev, mask) (0) - #ifdef CONFIG_PCI static inline void pci_dma_burst_advice(struct pci_dev *pdev, enum pci_dma_burst_strategy *strat, diff --git a/include/asm-sh64/pci.h b/include/asm-sh64/pci.h index 0a2b2bd48b87..57a67cf7a5c4 100644 --- a/include/asm-sh64/pci.h +++ b/include/asm-sh64/pci.h @@ -72,11 +72,6 @@ static inline void pcibios_penalize_isa_irq(int irq, int active) #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0) #endif -/* Not supporting more than 32-bit PCI bus addresses now, but - * must satisfy references to this function. Change if needed. - */ -#define pci_dac_dma_supported(pci_dev, mask) (0) - /* These macros should be used after a pci_map_sg call has been done * to get bus addresses of each of the SG entries and their lengths. * You should only work with the number of sg entries pci_map_sg diff --git a/include/asm-sparc/pci.h b/include/asm-sparc/pci.h index a1ff7acc7644..b93b6c79e08f 100644 --- a/include/asm-sparc/pci.h +++ b/include/asm-sparc/pci.h @@ -142,8 +142,6 @@ static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask) return 1; } -#define pci_dac_dma_supported(dev, mask) (0) - #ifdef CONFIG_PCI static inline void pci_dma_burst_advice(struct pci_dev *pdev, enum pci_dma_burst_strategy *strat, diff --git a/include/asm-sparc64/pci.h b/include/asm-sparc64/pci.h index 202915d82759..e11ac100f043 100644 --- a/include/asm-sparc64/pci.h +++ b/include/asm-sparc64/pci.h @@ -206,49 +206,6 @@ extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask); #define PCI64_REQUIRED_MASK (~(dma64_addr_t)0) #define PCI64_ADDR_BASE 0xfffc000000000000UL -/* Usage of the pci_dac_foo interfaces is only valid if this - * test passes. - */ -#define pci_dac_dma_supported(pci_dev, mask) \ - ((((mask) & PCI64_REQUIRED_MASK) == PCI64_REQUIRED_MASK) ? 1 : 0) - -static inline dma64_addr_t -pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction) -{ - return (PCI64_ADDR_BASE + - __pa(page_address(page)) + offset); -} - -static inline struct page * -pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr) -{ - unsigned long paddr = (dma_addr & PAGE_MASK) - PCI64_ADDR_BASE; - - return virt_to_page(__va(paddr)); -} - -static inline unsigned long -pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr) -{ - return (dma_addr & ~PAGE_MASK); -} - -static inline void -pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction) -{ - /* DAC cycle addressing does not make use of the - * PCI controller's streaming cache, so nothing to do. - */ -} - -static inline void -pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction) -{ - /* DAC cycle addressing does not make use of the - * PCI controller's streaming cache, so nothing to do. - */ -} - #define PCI_DMA_ERROR_CODE (~(dma_addr_t)0x0) static inline int pci_dma_mapping_error(dma_addr_t dma_addr) diff --git a/include/asm-v850/rte_cb.h b/include/asm-v850/rte_cb.h index 9f7f02cb0391..e85d261b79bf 100644 --- a/include/asm-v850/rte_cb.h +++ b/include/asm-v850/rte_cb.h @@ -64,7 +64,6 @@ /* As we don't really support PCI DMA to cpu memory, and use bounce-buffers instead, perversely enough, this becomes always true! */ # define pci_dma_supported(dev, mask) 1 -# define pci_dac_dma_supported(dev, mask) 0 # define pcibios_assign_all_busses() 1 #endif /* CONFIG_RTE_MB_A_PCI */ diff --git a/include/asm-x86_64/pci.h b/include/asm-x86_64/pci.h index d95c9e78fe1d..bda94fd5176f 100644 --- a/include/asm-x86_64/pci.h +++ b/include/asm-x86_64/pci.h @@ -54,14 +54,6 @@ extern int iommu_setup(char *opt); #if defined(CONFIG_IOMMU) || defined(CONFIG_CALGARY_IOMMU) -/* - * x86-64 always supports DAC, but sometimes it is useful to force - * devices through the IOMMU to get automatic sg list merging. - * Optional right now. - */ -extern int iommu_sac_force; -#define pci_dac_dma_supported(pci_dev, mask) (!iommu_sac_force) - #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \ dma_addr_t ADDR_NAME; #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \ @@ -78,8 +70,6 @@ extern int iommu_sac_force; #else /* No IOMMU */ -#define pci_dac_dma_supported(pci_dev, mask) 1 - #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) #define pci_unmap_addr(PTR, ADDR_NAME) (0) @@ -91,36 +81,6 @@ extern int iommu_sac_force; #include <asm-generic/pci-dma-compat.h> -static inline dma64_addr_t -pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction) -{ - return ((dma64_addr_t) page_to_phys(page) + - (dma64_addr_t) offset); -} - -static inline struct page * -pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr) -{ - return virt_to_page(__va(dma_addr)); -} - -static inline unsigned long -pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr) -{ - return (dma_addr & ~PAGE_MASK); -} - -static inline void -pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction) -{ -} - -static inline void -pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction) -{ - flush_write_buffers(); -} - #ifdef CONFIG_PCI static inline void pci_dma_burst_advice(struct pci_dev *pdev, enum pci_dma_burst_strategy *strat, diff --git a/include/asm-xtensa/pci.h b/include/asm-xtensa/pci.h index 644411c8e0ca..66410acf18b4 100644 --- a/include/asm-xtensa/pci.h +++ b/include/asm-xtensa/pci.h @@ -64,9 +64,6 @@ struct pci_dev; #define pci_ubnmap_len(PTR, LEN_NAME) (0) #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0) -/* We cannot access memory above 4GB */ -#define pci_dac_dma_supported(pci_dev, mask) (0) - /* Map a range of PCI memory or I/O space for a device into user space */ int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma, enum pci_mmap_state mmap_state, int write_combine); |