1 #ifndef __SPARC64_PCI_H
2 #define __SPARC64_PCI_H
9 /* Can be used to override the logic in pci_scan_bus for skipping
10 * already-configured bus numbers - to be used for buggy BIOSes
11 * or architectures with incomplete PCI setup by the loader.
13 #define pcibios_assign_all_busses() 0
14 #define pcibios_scan_all_fns(a, b) 0
16 #define PCIBIOS_MIN_IO 0UL
17 #define PCIBIOS_MIN_MEM 0UL
19 #define PCI_IRQ_NONE 0xffffffff
21 static inline void pcibios_set_master(struct pci_dev *dev)
23 /* No special bus mastering setup handling */
26 static inline void pcibios_penalize_isa_irq(int irq, int active)
28 /* We don't do dynamic PCI IRQ allocation */
31 /* Dynamic DMA mapping stuff.
34 /* The PCI address space does not equal the physical memory
35 * address space. The networking and block device layers use
36 * this boolean for bounce buffer decisions.
38 #define PCI_DMA_BUS_IS_PHYS (0)
40 #include <asm/scatterlist.h>
44 struct pci_iommu_ops {
45 void *(*alloc_consistent)(struct pci_dev *, size_t, dma_addr_t *, gfp_t);
46 void (*free_consistent)(struct pci_dev *, size_t, void *, dma_addr_t);
47 dma_addr_t (*map_single)(struct pci_dev *, void *, size_t, int);
48 void (*unmap_single)(struct pci_dev *, dma_addr_t, size_t, int);
49 int (*map_sg)(struct pci_dev *, struct scatterlist *, int, int);
50 void (*unmap_sg)(struct pci_dev *, struct scatterlist *, int, int);
51 void (*dma_sync_single_for_cpu)(struct pci_dev *, dma_addr_t, size_t, int);
52 void (*dma_sync_sg_for_cpu)(struct pci_dev *, struct scatterlist *, int, int);
55 extern struct pci_iommu_ops *pci_iommu_ops;
57 /* Allocate and map kernel buffer using consistent mode DMA for a device.
58 * hwdev should be valid struct pci_dev pointer for PCI devices.
60 static inline void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *dma_handle)
62 return pci_iommu_ops->alloc_consistent(hwdev, size, dma_handle, GFP_ATOMIC);
65 /* Free and unmap a consistent DMA buffer.
66 * cpu_addr is what was returned from pci_alloc_consistent,
67 * size must be the same as what as passed into pci_alloc_consistent,
68 * and likewise dma_addr must be the same as what *dma_addrp was set to.
70 * References to the memory and mappings associated with cpu_addr/dma_addr
71 * past this call are illegal.
73 static inline void pci_free_consistent(struct pci_dev *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle)
75 return pci_iommu_ops->free_consistent(hwdev, size, vaddr, dma_handle);
78 /* Map a single buffer of the indicated size for DMA in streaming mode.
79 * The 32-bit bus address to use is returned.
81 * Once the device is given the dma address, the device owns this memory
82 * until either pci_unmap_single or pci_dma_sync_single_for_cpu is performed.
84 static inline dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction)
86 return pci_iommu_ops->map_single(hwdev, ptr, size, direction);
89 /* Unmap a single streaming mode DMA translation. The dma_addr and size
90 * must match what was provided for in a previous pci_map_single call. All
91 * other usages are undefined.
93 * After this call, reads by the cpu to the buffer are guaranteed to see
94 * whatever the device wrote there.
96 static inline void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, size_t size, int direction)
98 pci_iommu_ops->unmap_single(hwdev, dma_addr, size, direction);
101 /* No highmem on sparc64, plus we have an IOMMU, so mapping pages is easy. */
102 #define pci_map_page(dev, page, off, size, dir) \
103 pci_map_single(dev, (page_address(page) + (off)), size, dir)
104 #define pci_unmap_page(dev,addr,sz,dir) pci_unmap_single(dev,addr,sz,dir)
106 /* pci_unmap_{single,page} is not a nop, thus... */
107 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
108 dma_addr_t ADDR_NAME;
109 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
111 #define pci_unmap_addr(PTR, ADDR_NAME) \
113 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
114 (((PTR)->ADDR_NAME) = (VAL))
115 #define pci_unmap_len(PTR, LEN_NAME) \
117 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
118 (((PTR)->LEN_NAME) = (VAL))
120 /* Map a set of buffers described by scatterlist in streaming
121 * mode for DMA. This is the scatter-gather version of the
122 * above pci_map_single interface. Here the scatter gather list
123 * elements are each tagged with the appropriate dma address
124 * and length. They are obtained via sg_dma_{address,length}(SG).
126 * NOTE: An implementation may be able to use a smaller number of
127 * DMA address/length pairs than there are SG table elements.
128 * (for example via virtual mapping capabilities)
129 * The routine returns the number of addr/length pairs actually
130 * used, at most nents.
132 * Device ownership issues as mentioned above for pci_map_single are
135 static inline int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction)
137 return pci_iommu_ops->map_sg(hwdev, sg, nents, direction);
140 /* Unmap a set of streaming mode DMA translations.
141 * Again, cpu read rules concerning calls here are the same as for
142 * pci_unmap_single() above.
144 static inline void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nhwents, int direction)
146 pci_iommu_ops->unmap_sg(hwdev, sg, nhwents, direction);
149 /* Make physical memory consistent for a single
150 * streaming mode DMA translation after a transfer.
152 * If you perform a pci_map_single() but wish to interrogate the
153 * buffer using the cpu, yet do not wish to teardown the PCI dma
154 * mapping, you must call this function before doing so. At the
155 * next point you give the PCI dma address back to the card, you
156 * must first perform a pci_dma_sync_for_device, and then the
157 * device again owns the buffer.
159 static inline void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction)
161 pci_iommu_ops->dma_sync_single_for_cpu(hwdev, dma_handle, size, direction);
165 pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle,
166 size_t size, int direction)
168 /* No flushing needed to sync cpu writes to the device. */
169 BUG_ON(direction == PCI_DMA_NONE);
172 /* Make physical memory consistent for a set of streaming
173 * mode DMA translations after a transfer.
175 * The same as pci_dma_sync_single_* but for a scatter-gather list,
176 * same rules and usage.
178 static inline void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction)
180 pci_iommu_ops->dma_sync_sg_for_cpu(hwdev, sg, nelems, direction);
184 pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg,
185 int nelems, int direction)
187 /* No flushing needed to sync cpu writes to the device. */
188 BUG_ON(direction == PCI_DMA_NONE);
191 /* Return whether the given PCI device DMA address mask can
192 * be supported properly. For example, if your device can
193 * only drive the low 24-bits during PCI bus mastering, then
194 * you would pass 0x00ffffff as the mask to this function.
196 extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask);
198 /* PCI IOMMU mapping bypass support. */
200 /* PCI 64-bit addressing works for all slots on all controller
201 * types on sparc64. However, it requires that the device
202 * can drive enough of the 64 bits.
204 #define PCI64_REQUIRED_MASK (~(dma64_addr_t)0)
205 #define PCI64_ADDR_BASE 0xfffc000000000000UL
207 /* Usage of the pci_dac_foo interfaces is only valid if this
210 #define pci_dac_dma_supported(pci_dev, mask) \
211 ((((mask) & PCI64_REQUIRED_MASK) == PCI64_REQUIRED_MASK) ? 1 : 0)
213 static inline dma64_addr_t
214 pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
216 return (PCI64_ADDR_BASE +
217 __pa(page_address(page)) + offset);
220 static inline struct page *
221 pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
223 unsigned long paddr = (dma_addr & PAGE_MASK) - PCI64_ADDR_BASE;
225 return virt_to_page(__va(paddr));
228 static inline unsigned long
229 pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
231 return (dma_addr & ~PAGE_MASK);
235 pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
237 /* DAC cycle addressing does not make use of the
238 * PCI controller's streaming cache, so nothing to do.
243 pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
245 /* DAC cycle addressing does not make use of the
246 * PCI controller's streaming cache, so nothing to do.
250 #define PCI_DMA_ERROR_CODE (~(dma_addr_t)0x0)
252 static inline int pci_dma_mapping_error(dma_addr_t dma_addr)
254 return (dma_addr == PCI_DMA_ERROR_CODE);
258 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
259 enum pci_dma_burst_strategy *strat,
260 unsigned long *strategy_parameter)
262 unsigned long cacheline_size;
265 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
267 cacheline_size = 1024;
269 cacheline_size = (int) byte * 4;
271 *strat = PCI_DMA_BURST_BOUNDARY;
272 *strategy_parameter = cacheline_size;
276 /* Return the index of the PCI controller for device PDEV. */
278 extern int pci_domain_nr(struct pci_bus *bus);
279 static inline int pci_proc_domain(struct pci_bus *bus)
284 /* Platform support for /proc/bus/pci/X/Y mmap()s. */
286 #define HAVE_PCI_MMAP
287 #define HAVE_ARCH_PCI_GET_UNMAPPED_AREA
288 #define get_pci_unmapped_area get_fb_unmapped_area
290 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
291 enum pci_mmap_state mmap_state,
294 /* Platform specific MWI support. */
295 #define HAVE_ARCH_PCI_MWI
296 extern int pcibios_prep_mwi(struct pci_dev *dev);
299 pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
300 struct resource *res);
303 pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
304 struct pci_bus_region *region);
306 extern struct resource *pcibios_select_root(struct pci_dev *, struct resource *);
308 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
312 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
317 #endif /* __KERNEL__ */
319 #endif /* __SPARC64_PCI_H */