arch/sparc/include/asm/pci_64.h

   1 #ifndef __SPARC64_PCI_H
   2 #define __SPARC64_PCI_H
   3
   4 #ifdef __KERNEL__
   5
   6 #include <linux/dma-mapping.h>
   7
   8 /* Can be used to override the logic in pci_scan_bus for skipping
   9  * already-configured bus numbers - to be used for buggy BIOSes
  10  * or architectures with incomplete PCI setup by the loader.
  11  */
  12 #define pcibios_assign_all_busses()     0
  13 #define pcibios_scan_all_fns(a, b)      0
  14
  15 #define PCIBIOS_MIN_IO          0UL
  16 #define PCIBIOS_MIN_MEM         0UL
  17
  18 #define PCI_IRQ_NONE            0xffffffff
  19
  20 #define PCI_CACHE_LINE_BYTES    64
  21
  22 static inline void pcibios_set_master(struct pci_dev *dev)
  23 {
  24         /* No special bus mastering setup handling */
  25 }
  26
  27 static inline void pcibios_penalize_isa_irq(int irq, int active)
  28 {
  29         /* We don't do dynamic PCI IRQ allocation */
  30 }
  31
  32 /* The PCI address space does not equal the physical memory
  33  * address space.  The networking and block device layers use
  34  * this boolean for bounce buffer decisions.
  35  */
  36 #define PCI_DMA_BUS_IS_PHYS     (0)
  37
  38 static inline void *pci_alloc_consistent(struct pci_dev *pdev, size_t size,
  39                                          dma_addr_t *dma_handle)
  40 {
  41         return dma_alloc_coherent(&pdev->dev, size, dma_handle, GFP_ATOMIC);
  42 }
  43
  44 static inline void pci_free_consistent(struct pci_dev *pdev, size_t size,
  45                                        void *vaddr, dma_addr_t dma_handle)
  46 {
  47         return dma_free_coherent(&pdev->dev, size, vaddr, dma_handle);
  48 }
  49
  50 static inline dma_addr_t pci_map_single(struct pci_dev *pdev, void *ptr,
  51                                         size_t size, int direction)
  52 {
  53         return dma_map_single(&pdev->dev, ptr, size,
  54                               (enum dma_data_direction) direction);
  55 }
  56
  57 static inline void pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr,
  58                                     size_t size, int direction)
  59 {
  60         dma_unmap_single(&pdev->dev, dma_addr, size,
  61                          (enum dma_data_direction) direction);
  62 }
  63
  64 #define pci_map_page(dev, page, off, size, dir) \
  65         pci_map_single(dev, (page_address(page) + (off)), size, dir)
  66 #define pci_unmap_page(dev,addr,sz,dir) \
  67         pci_unmap_single(dev,addr,sz,dir)
  68
  69 /* pci_unmap_{single,page} is not a nop, thus... */
  70 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
  71         dma_addr_t ADDR_NAME;
  72 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
  73         __u32 LEN_NAME;
  74 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
  75         ((PTR)->ADDR_NAME)
  76 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
  77         (((PTR)->ADDR_NAME) = (VAL))
  78 #define pci_unmap_len(PTR, LEN_NAME)                    \
  79         ((PTR)->LEN_NAME)
  80 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
  81         (((PTR)->LEN_NAME) = (VAL))
  82
  83 static inline int pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg,
  84                              int nents, int direction)
  85 {
  86         return dma_map_sg(&pdev->dev, sg, nents,
  87                           (enum dma_data_direction) direction);
  88 }
  89
  90 static inline void pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg,
  91                                 int nents, int direction)
  92 {
  93         dma_unmap_sg(&pdev->dev, sg, nents,
  94                      (enum dma_data_direction) direction);
  95 }
  96
  97 static inline void pci_dma_sync_single_for_cpu(struct pci_dev *pdev,
  98                                                dma_addr_t dma_handle,
  99                                                size_t size, int direction)
 100 {
 101         dma_sync_single_for_cpu(&pdev->dev, dma_handle, size,
 102                                 (enum dma_data_direction) direction);
 103 }
 104
 105 static inline void pci_dma_sync_single_for_device(struct pci_dev *pdev,
 106                                                   dma_addr_t dma_handle,
 107                                                   size_t size, int direction)
 108 {
 109         /* No flushing needed to sync cpu writes to the device.  */
 110 }
 111
 112 static inline void pci_dma_sync_sg_for_cpu(struct pci_dev *pdev,
 113                                            struct scatterlist *sg,
 114                                            int nents, int direction)
 115 {
 116         dma_sync_sg_for_cpu(&pdev->dev, sg, nents,
 117                             (enum dma_data_direction) direction);
 118 }
 119
 120 static inline void pci_dma_sync_sg_for_device(struct pci_dev *pdev,
 121                                               struct scatterlist *sg,
 122                                               int nelems, int direction)
 123 {
 124         /* No flushing needed to sync cpu writes to the device.  */
 125 }
 126
 127 /* Return whether the given PCI device DMA address mask can
 128  * be supported properly.  For example, if your device can
 129  * only drive the low 24-bits during PCI bus mastering, then
 130  * you would pass 0x00ffffff as the mask to this function.
 131  */
 132 extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask);
 133
 134 /* PCI IOMMU mapping bypass support. */
 135
 136 /* PCI 64-bit addressing works for all slots on all controller
 137  * types on sparc64.  However, it requires that the device
 138  * can drive enough of the 64 bits.
 139  */
 140 #define PCI64_REQUIRED_MASK     (~(dma64_addr_t)0)
 141 #define PCI64_ADDR_BASE         0xfffc000000000000UL
 142
 143 static inline int pci_dma_mapping_error(struct pci_dev *pdev,
 144                                         dma_addr_t dma_addr)
 145 {
 146         return dma_mapping_error(&pdev->dev, dma_addr);
 147 }
 148
 149 #ifdef CONFIG_PCI
 150 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 151                                         enum pci_dma_burst_strategy *strat,
 152                                         unsigned long *strategy_parameter)
 153 {
 154         unsigned long cacheline_size;
 155         u8 byte;
 156
 157         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
 158         if (byte == 0)
 159                 cacheline_size = 1024;
 160         else
 161                 cacheline_size = (int) byte * 4;
 162
 163         *strat = PCI_DMA_BURST_BOUNDARY;
 164         *strategy_parameter = cacheline_size;
 165 }
 166 #endif
 167
 168 /* Return the index of the PCI controller for device PDEV. */
 169
 170 extern int pci_domain_nr(struct pci_bus *bus);
 171 static inline int pci_proc_domain(struct pci_bus *bus)
 172 {
 173         return 1;
 174 }
 175
 176 /* Platform support for /proc/bus/pci/X/Y mmap()s. */
 177
 178 #define HAVE_PCI_MMAP
 179 #define HAVE_ARCH_PCI_GET_UNMAPPED_AREA
 180 #define get_pci_unmapped_area get_fb_unmapped_area
 181
 182 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 183                                enum pci_mmap_state mmap_state,
 184                                int write_combine);
 185
 186 extern void
 187 pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
 188                         struct resource *res);
 189
 190 extern void
 191 pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
 192                         struct pci_bus_region *region);
 193
 194 extern struct resource *pcibios_select_root(struct pci_dev *, struct resource *);
 195
 196 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 197 {
 198         return PCI_IRQ_NONE;
 199 }
 200
 201 struct device_node;
 202 extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev);
 203
 204 #define HAVE_ARCH_PCI_RESOURCE_TO_USER
 205 extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
 206                                  const struct resource *rsrc,
 207                                  resource_size_t *start, resource_size_t *end);
 208 #endif /* __KERNEL__ */
 209
 210 #endif /* __SPARC64_PCI_H */