include/asm-arm/pci.h

   1 #ifndef ASMARM_PCI_H
   2 #define ASMARM_PCI_H
   3
   4 #ifdef __KERNEL__
   5 #include <linux/config.h>
   6 #include <linux/dma-mapping.h>
   7
   8 #include <asm/hardware.h> /* for PCIBIOS_MIN_* */
   9
  10 #ifdef CONFIG_SA1111
  11 /*
  12  * Keep the SA1111 DMA-mapping tricks until the USB layer gets
  13  * properly converted to the new DMA-mapping API, at which time
  14  * most of this file can die.
  15  */
  16 #define SA1111_FAKE_PCIDEV ((struct pci_dev *) 1111)
  17 #define pcidev_is_sa1111(dev) (dev == SA1111_FAKE_PCIDEV)
  18 #else
  19 #define pcidev_is_sa1111(dev) (0)
  20 #endif
  21
  22
  23 static inline void pcibios_set_master(struct pci_dev *dev)
  24 {
  25         /* No special bus mastering setup handling */
  26 }
  27
  28 static inline void pcibios_penalize_isa_irq(int irq)
  29 {
  30         /* We don't do dynamic PCI IRQ allocation */
  31 }
  32
  33 /*
  34  * The PCI address space does equal the physical memory address space.
  35  * The networking and block device layers use this boolean for bounce
  36  * buffer decisions.
  37  */
  38 #define PCI_DMA_BUS_IS_PHYS     (0)
  39
  40 static inline void *
  41 pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *handle)
  42 {
  43         int gfp = GFP_ATOMIC;
  44
  45         if (hwdev == NULL || pcidev_is_sa1111(hwdev) ||
  46             hwdev->dma_mask != 0xffffffff)
  47                 gfp |= GFP_DMA;
  48
  49         return consistent_alloc(gfp, size, handle, 0);
  50 }
  51
  52 static inline void
  53 pci_free_consistent(struct pci_dev *hwdev, size_t size, void *vaddr,
  54                     dma_addr_t handle)
  55 {
  56         dma_free_coherent(hwdev ? &hwdev->dev : NULL, size, vaddr, handle);
  57 }
  58
  59 static inline dma_addr_t
  60 pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int dir)
  61 {
  62         if (pcidev_is_sa1111(hwdev))
  63                 return sa1111_map_single(ptr, size, dir);
  64
  65         return dma_map_single(hwdev ? &hwdev->dev : NULL, ptr, size, dir);
  66 }
  67
  68 static inline void
  69 pci_unmap_single(struct pci_dev *hwdev, dma_addr_t handle, size_t size, int dir)
  70 {
  71         if (pcidev_is_sa1111(hwdev)) {
  72                 sa1111_unmap_single(handle, size, dir);
  73                 return;
  74         }
  75
  76         return dma_unmap_single(hwdev ? &hwdev->dev : NULL, handle, size, dir);
  77 }
  78
  79 static inline int
  80 pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int dir)
  81 {
  82         if (pcidev_is_sa1111(hwdev))
  83                 return sa1111_map_sg(sg, nents, dir);
  84
  85         return dma_map_sg(hwdev ? &hwdev->dev : NULL, sg, nents, dir);
  86 }
  87
  88 static inline void
  89 pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int dir)
  90 {
  91         if (pcidev_is_sa1111(hwdev)) {
  92                 sa1111_unmap_sg(sg, nents, dir);
  93                 return;
  94         }
  95
  96         return dma_unmap_sg(hwdev ? &hwdev->dev : NULL, sg, nents, dir);
  97 }
  98
  99 static inline void
 100 pci_dma_sync_single(struct pci_dev *hwdev, dma_addr_t handle, size_t size, int dir)
 101 {
 102         if (pcidev_is_sa1111(hwdev)) {
 103                 sa1111_dma_sync_single(handle, size, dir);
 104                 return;
 105         }
 106
 107         return dma_sync_single(hwdev ? &hwdev->dev : NULL, handle, size, dir);
 108 }
 109
 110 static inline void
 111 pci_dma_sync_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int dir)
 112 {
 113         if (pcidev_is_sa1111(hwdev)) {
 114                 sa1111_dma_sync_sg(sg, nelems, dir);
 115                 return;
 116         }
 117
 118         return dma_sync_sg(hwdev ? &hwdev->dev : NULL, sg, nelems, dir);
 119 }
 120
 121 static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask)
 122 {
 123         return 1;
 124 }
 125
 126 /*
 127  * We don't support DAC DMA cycles.
 128  */
 129 #define pci_dac_dma_supported(pci_dev, mask)    (0)
 130
 131 /*
 132  * Return the index of the PCI controller for device PDEV.
 133  */
 134 #define pci_controller_num(PDEV)        (0)
 135
 136
 137 #if defined(CONFIG_SA1111) && !defined(CONFIG_PCI)
 138 /*
 139  * SA-1111 needs these prototypes even when !defined(CONFIG_PCI)
 140  *
 141  * kmem_cache style wrapper around pci_alloc_consistent()
 142  */
 143 struct pci_pool *pci_pool_create (const char *name, struct pci_dev *dev,
 144                 size_t size, size_t align, size_t allocation);
 145 void pci_pool_destroy (struct pci_pool *pool);
 146
 147 void *pci_pool_alloc (struct pci_pool *pool, int flags, dma_addr_t *handle);
 148 void pci_pool_free (struct pci_pool *pool, void *vaddr, dma_addr_t addr);
 149 #endif
 150
 151 /*
 152  * Whether pci_unmap_{single,page} is a nop depends upon the
 153  * configuration.
 154  */
 155 #if defined(CONFIG_PCI) || defined(CONFIG_SA1111)
 156 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       dma_addr_t ADDR_NAME;
 157 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         __u32 LEN_NAME;
 158 #define pci_unmap_addr(PTR, ADDR_NAME)          ((PTR)->ADDR_NAME)
 159 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL))
 160 #define pci_unmap_len(PTR, LEN_NAME)            ((PTR)->LEN_NAME)
 161 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   (((PTR)->LEN_NAME) = (VAL))
 162 #else
 163 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
 164 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
 165 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
 166 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
 167 #define pci_unmap_len(PTR, LEN_NAME)            (0)
 168 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
 169 #endif
 170
 171 #define HAVE_PCI_MMAP
 172 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 173                                enum pci_mmap_state mmap_state, int write_combine);
 174
 175 #endif /* __KERNEL__ */
 176
 177 #endif