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1 | #ifndef __ALPHA_PCI_H | |
2 | #define __ALPHA_PCI_H | |
3 | ||
4 | #ifdef __KERNEL__ | |
5 | ||
6 | #include <linux/spinlock.h> | |
7 | #include <asm/scatterlist.h> | |
8 | #include <asm/machvec.h> | |
9 | ||
10 | /* | |
11 | * The following structure is used to manage multiple PCI busses. | |
12 | */ | |
13 | ||
14 | struct pci_dev; | |
15 | struct pci_bus; | |
16 | struct resource; | |
17 | struct pci_iommu_arena; | |
18 | struct page; | |
19 | ||
20 | /* A controller. Used to manage multiple PCI busses. */ | |
21 | ||
22 | struct pci_controller { | |
23 | struct pci_controller *next; | |
24 | struct pci_bus *bus; | |
25 | struct resource *io_space; | |
26 | struct resource *mem_space; | |
27 | ||
28 | /* The following are for reporting to userland. The invariant is | |
29 | that if we report a BWX-capable dense memory, we do not report | |
30 | a sparse memory at all, even if it exists. */ | |
31 | unsigned long sparse_mem_base; | |
32 | unsigned long dense_mem_base; | |
33 | unsigned long sparse_io_base; | |
34 | unsigned long dense_io_base; | |
35 | ||
36 | /* This one's for the kernel only. It's in KSEG somewhere. */ | |
37 | unsigned long config_space_base; | |
38 | ||
39 | unsigned int index; | |
40 | /* For compatibility with current (as of July 2003) pciutils | |
41 | and XFree86. Eventually will be removed. */ | |
42 | unsigned int need_domain_info; | |
43 | ||
44 | struct pci_iommu_arena *sg_pci; | |
45 | struct pci_iommu_arena *sg_isa; | |
46 | ||
47 | void *sysdata; | |
48 | }; | |
49 | ||
50 | /* Override the logic in pci_scan_bus for skipping already-configured | |
51 | bus numbers. */ | |
52 | ||
53 | #define pcibios_assign_all_busses() 1 | |
54 | #define pcibios_scan_all_fns(a, b) 0 | |
55 | ||
56 | #define PCIBIOS_MIN_IO alpha_mv.min_io_address | |
57 | #define PCIBIOS_MIN_MEM alpha_mv.min_mem_address | |
58 | ||
59 | extern void pcibios_set_master(struct pci_dev *dev); | |
60 | ||
61 | extern inline void pcibios_penalize_isa_irq(int irq, int active) | |
62 | { | |
63 | /* We don't do dynamic PCI IRQ allocation */ | |
64 | } | |
65 | ||
66 | /* IOMMU controls. */ | |
67 | ||
68 | /* The PCI address space does not equal the physical memory address space. | |
69 | The networking and block device layers use this boolean for bounce buffer | |
70 | decisions. */ | |
71 | #define PCI_DMA_BUS_IS_PHYS 0 | |
72 | ||
73 | /* Allocate and map kernel buffer using consistent mode DMA for PCI | |
74 | device. Returns non-NULL cpu-view pointer to the buffer if | |
75 | successful and sets *DMA_ADDRP to the pci side dma address as well, | |
76 | else DMA_ADDRP is undefined. */ | |
77 | ||
78 | extern void *pci_alloc_consistent(struct pci_dev *, size_t, dma_addr_t *); | |
79 | ||
80 | /* Free and unmap a consistent DMA buffer. CPU_ADDR and DMA_ADDR must | |
81 | be values that were returned from pci_alloc_consistent. SIZE must | |
82 | be the same as what as passed into pci_alloc_consistent. | |
83 | References to the memory and mappings associated with CPU_ADDR or | |
84 | DMA_ADDR past this call are illegal. */ | |
85 | ||
86 | extern void pci_free_consistent(struct pci_dev *, size_t, void *, dma_addr_t); | |
87 | ||
88 | /* Map a single buffer of the indicate size for PCI DMA in streaming mode. | |
89 | The 32-bit PCI bus mastering address to use is returned. Once the device | |
90 | is given the dma address, the device owns this memory until either | |
91 | pci_unmap_single or pci_dma_sync_single_for_cpu is performed. */ | |
92 | ||
93 | extern dma_addr_t pci_map_single(struct pci_dev *, void *, size_t, int); | |
94 | ||
95 | /* Likewise, but for a page instead of an address. */ | |
96 | extern dma_addr_t pci_map_page(struct pci_dev *, struct page *, | |
97 | unsigned long, size_t, int); | |
98 | ||
99 | /* Test for pci_map_single or pci_map_page having generated an error. */ | |
100 | ||
101 | static inline int | |
102 | pci_dma_mapping_error(dma_addr_t dma_addr) | |
103 | { | |
104 | return dma_addr == 0; | |
105 | } | |
106 | ||
107 | /* Unmap a single streaming mode DMA translation. The DMA_ADDR and | |
108 | SIZE must match what was provided for in a previous pci_map_single | |
109 | call. All other usages are undefined. After this call, reads by | |
110 | the cpu to the buffer are guaranteed to see whatever the device | |
111 | wrote there. */ | |
112 | ||
113 | extern void pci_unmap_single(struct pci_dev *, dma_addr_t, size_t, int); | |
114 | extern void pci_unmap_page(struct pci_dev *, dma_addr_t, size_t, int); | |
115 | ||
116 | /* pci_unmap_{single,page} is not a nop, thus... */ | |
117 | #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \ | |
118 | dma_addr_t ADDR_NAME; | |
119 | #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \ | |
120 | __u32 LEN_NAME; | |
121 | #define pci_unmap_addr(PTR, ADDR_NAME) \ | |
122 | ((PTR)->ADDR_NAME) | |
123 | #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \ | |
124 | (((PTR)->ADDR_NAME) = (VAL)) | |
125 | #define pci_unmap_len(PTR, LEN_NAME) \ | |
126 | ((PTR)->LEN_NAME) | |
127 | #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \ | |
128 | (((PTR)->LEN_NAME) = (VAL)) | |
129 | ||
130 | /* Map a set of buffers described by scatterlist in streaming mode for | |
131 | PCI DMA. This is the scatter-gather version of the above | |
132 | pci_map_single interface. Here the scatter gather list elements | |
133 | are each tagged with the appropriate PCI dma address and length. | |
134 | They are obtained via sg_dma_{address,length}(SG). | |
135 | ||
136 | NOTE: An implementation may be able to use a smaller number of DMA | |
137 | address/length pairs than there are SG table elements. (for | |
138 | example via virtual mapping capabilities) The routine returns the | |
139 | number of addr/length pairs actually used, at most nents. | |
140 | ||
141 | Device ownership issues as mentioned above for pci_map_single are | |
142 | the same here. */ | |
143 | ||
144 | extern int pci_map_sg(struct pci_dev *, struct scatterlist *, int, int); | |
145 | ||
146 | /* Unmap a set of streaming mode DMA translations. Again, cpu read | |
147 | rules concerning calls here are the same as for pci_unmap_single() | |
148 | above. */ | |
149 | ||
150 | extern void pci_unmap_sg(struct pci_dev *, struct scatterlist *, int, int); | |
151 | ||
152 | /* Make physical memory consistent for a single streaming mode DMA | |
153 | translation after a transfer and device currently has ownership | |
154 | of the buffer. | |
155 | ||
156 | If you perform a pci_map_single() but wish to interrogate the | |
157 | buffer using the cpu, yet do not wish to teardown the PCI dma | |
158 | mapping, you must call this function before doing so. At the next | |
159 | point you give the PCI dma address back to the card, you must first | |
160 | perform a pci_dma_sync_for_device, and then the device again owns | |
161 | the buffer. */ | |
162 | ||
163 | static inline void | |
164 | pci_dma_sync_single_for_cpu(struct pci_dev *dev, dma_addr_t dma_addr, | |
165 | long size, int direction) | |
166 | { | |
167 | /* Nothing to do. */ | |
168 | } | |
169 | ||
170 | static inline void | |
171 | pci_dma_sync_single_for_device(struct pci_dev *dev, dma_addr_t dma_addr, | |
172 | size_t size, int direction) | |
173 | { | |
174 | /* Nothing to do. */ | |
175 | } | |
176 | ||
177 | /* Make physical memory consistent for a set of streaming mode DMA | |
178 | translations after a transfer. The same as pci_dma_sync_single_* | |
179 | but for a scatter-gather list, same rules and usage. */ | |
180 | ||
181 | static inline void | |
182 | pci_dma_sync_sg_for_cpu(struct pci_dev *dev, struct scatterlist *sg, | |
183 | int nents, int direction) | |
184 | { | |
185 | /* Nothing to do. */ | |
186 | } | |
187 | ||
188 | static inline void | |
189 | pci_dma_sync_sg_for_device(struct pci_dev *dev, struct scatterlist *sg, | |
190 | int nents, int direction) | |
191 | { | |
192 | /* Nothing to do. */ | |
193 | } | |
194 | ||
195 | /* Return whether the given PCI device DMA address mask can | |
196 | be supported properly. For example, if your device can | |
197 | only drive the low 24-bits during PCI bus mastering, then | |
198 | you would pass 0x00ffffff as the mask to this function. */ | |
199 | ||
200 | extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask); | |
201 | ||
202 | /* True if the machine supports DAC addressing, and DEV can | |
203 | make use of it given MASK. */ | |
204 | extern int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask); | |
205 | ||
206 | /* Convert to/from DAC dma address and struct page. */ | |
207 | extern dma64_addr_t pci_dac_page_to_dma(struct pci_dev *, struct page *, | |
208 | unsigned long, int); | |
209 | extern struct page *pci_dac_dma_to_page(struct pci_dev *, dma64_addr_t); | |
210 | extern unsigned long pci_dac_dma_to_offset(struct pci_dev *, dma64_addr_t); | |
211 | ||
212 | static inline void | |
213 | pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, | |
214 | size_t len, int direction) | |
215 | { | |
216 | /* Nothing to do. */ | |
217 | } | |
218 | ||
219 | static inline void | |
220 | pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, | |
221 | size_t len, int direction) | |
222 | { | |
223 | /* Nothing to do. */ | |
224 | } | |
225 | ||
226 | #ifdef CONFIG_PCI | |
227 | static inline void pci_dma_burst_advice(struct pci_dev *pdev, | |
228 | enum pci_dma_burst_strategy *strat, | |
229 | unsigned long *strategy_parameter) | |
230 | { | |
231 | unsigned long cacheline_size; | |
232 | u8 byte; | |
233 | ||
234 | pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte); | |
235 | if (byte == 0) | |
236 | cacheline_size = 1024; | |
237 | else | |
238 | cacheline_size = (int) byte * 4; | |
239 | ||
240 | *strat = PCI_DMA_BURST_BOUNDARY; | |
241 | *strategy_parameter = cacheline_size; | |
242 | } | |
243 | #endif | |
244 | ||
245 | /* TODO: integrate with include/asm-generic/pci.h ? */ | |
246 | static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) | |
247 | { | |
248 | return channel ? 15 : 14; | |
249 | } | |
250 | ||
251 | extern void pcibios_resource_to_bus(struct pci_dev *, struct pci_bus_region *, | |
252 | struct resource *); | |
253 | ||
254 | #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index | |
255 | ||
256 | static inline int pci_proc_domain(struct pci_bus *bus) | |
257 | { | |
258 | struct pci_controller *hose = bus->sysdata; | |
259 | return hose->need_domain_info; | |
260 | } | |
261 | ||
262 | static inline void | |
263 | pcibios_add_platform_entries(struct pci_dev *dev) | |
264 | { | |
265 | } | |
266 | ||
267 | struct pci_dev *alpha_gendev_to_pci(struct device *dev); | |
268 | ||
269 | #endif /* __KERNEL__ */ | |
270 | ||
271 | /* Values for the `which' argument to sys_pciconfig_iobase. */ | |
272 | #define IOBASE_HOSE 0 | |
273 | #define IOBASE_SPARSE_MEM 1 | |
274 | #define IOBASE_DENSE_MEM 2 | |
275 | #define IOBASE_SPARSE_IO 3 | |
276 | #define IOBASE_DENSE_IO 4 | |
277 | #define IOBASE_ROOT_BUS 5 | |
278 | #define IOBASE_FROM_HOSE 0x10000 | |
279 | ||
280 | #endif /* __ALPHA_PCI_H */ |