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a2fb23af | 1 | /* pci.c: UltraSparc PCI controller support. |
1da177e4 LT |
2 | * |
3 | * Copyright (C) 1997, 1998, 1999 David S. Miller (davem@redhat.com) | |
4 | * Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be) | |
5 | * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz) | |
a2fb23af DM |
6 | * |
7 | * OF tree based PCI bus probing taken from the PowerPC port | |
8 | * with minor modifications, see there for credits. | |
1da177e4 LT |
9 | */ |
10 | ||
066bcaca | 11 | #include <linux/export.h> |
1da177e4 LT |
12 | #include <linux/kernel.h> |
13 | #include <linux/string.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/capability.h> | |
16 | #include <linux/errno.h> | |
c57c2ffb | 17 | #include <linux/pci.h> |
35a17eb6 DM |
18 | #include <linux/msi.h> |
19 | #include <linux/irq.h> | |
1da177e4 | 20 | #include <linux/init.h> |
356d1647 DM |
21 | #include <linux/of.h> |
22 | #include <linux/of_device.h> | |
1da177e4 LT |
23 | |
24 | #include <asm/uaccess.h> | |
1da177e4 LT |
25 | #include <asm/pgtable.h> |
26 | #include <asm/irq.h> | |
e87dc350 | 27 | #include <asm/prom.h> |
01f94c4a | 28 | #include <asm/apb.h> |
1da177e4 | 29 | |
1e8a8cc5 | 30 | #include "pci_impl.h" |
4ac7b826 | 31 | #include "kernel.h" |
1e8a8cc5 | 32 | |
1da177e4 | 33 | /* List of all PCI controllers found in the system. */ |
34768bc8 | 34 | struct pci_pbm_info *pci_pbm_root = NULL; |
1da177e4 | 35 | |
6c108f12 DM |
36 | /* Each PBM found gets a unique index. */ |
37 | int pci_num_pbms = 0; | |
1da177e4 | 38 | |
1da177e4 LT |
39 | volatile int pci_poke_in_progress; |
40 | volatile int pci_poke_cpu = -1; | |
41 | volatile int pci_poke_faulted; | |
42 | ||
43 | static DEFINE_SPINLOCK(pci_poke_lock); | |
44 | ||
45 | void pci_config_read8(u8 *addr, u8 *ret) | |
46 | { | |
47 | unsigned long flags; | |
48 | u8 byte; | |
49 | ||
50 | spin_lock_irqsave(&pci_poke_lock, flags); | |
51 | pci_poke_cpu = smp_processor_id(); | |
52 | pci_poke_in_progress = 1; | |
53 | pci_poke_faulted = 0; | |
54 | __asm__ __volatile__("membar #Sync\n\t" | |
55 | "lduba [%1] %2, %0\n\t" | |
56 | "membar #Sync" | |
57 | : "=r" (byte) | |
58 | : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) | |
59 | : "memory"); | |
60 | pci_poke_in_progress = 0; | |
61 | pci_poke_cpu = -1; | |
62 | if (!pci_poke_faulted) | |
63 | *ret = byte; | |
64 | spin_unlock_irqrestore(&pci_poke_lock, flags); | |
65 | } | |
66 | ||
67 | void pci_config_read16(u16 *addr, u16 *ret) | |
68 | { | |
69 | unsigned long flags; | |
70 | u16 word; | |
71 | ||
72 | spin_lock_irqsave(&pci_poke_lock, flags); | |
73 | pci_poke_cpu = smp_processor_id(); | |
74 | pci_poke_in_progress = 1; | |
75 | pci_poke_faulted = 0; | |
76 | __asm__ __volatile__("membar #Sync\n\t" | |
77 | "lduha [%1] %2, %0\n\t" | |
78 | "membar #Sync" | |
79 | : "=r" (word) | |
80 | : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) | |
81 | : "memory"); | |
82 | pci_poke_in_progress = 0; | |
83 | pci_poke_cpu = -1; | |
84 | if (!pci_poke_faulted) | |
85 | *ret = word; | |
86 | spin_unlock_irqrestore(&pci_poke_lock, flags); | |
87 | } | |
88 | ||
89 | void pci_config_read32(u32 *addr, u32 *ret) | |
90 | { | |
91 | unsigned long flags; | |
92 | u32 dword; | |
93 | ||
94 | spin_lock_irqsave(&pci_poke_lock, flags); | |
95 | pci_poke_cpu = smp_processor_id(); | |
96 | pci_poke_in_progress = 1; | |
97 | pci_poke_faulted = 0; | |
98 | __asm__ __volatile__("membar #Sync\n\t" | |
99 | "lduwa [%1] %2, %0\n\t" | |
100 | "membar #Sync" | |
101 | : "=r" (dword) | |
102 | : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) | |
103 | : "memory"); | |
104 | pci_poke_in_progress = 0; | |
105 | pci_poke_cpu = -1; | |
106 | if (!pci_poke_faulted) | |
107 | *ret = dword; | |
108 | spin_unlock_irqrestore(&pci_poke_lock, flags); | |
109 | } | |
110 | ||
111 | void pci_config_write8(u8 *addr, u8 val) | |
112 | { | |
113 | unsigned long flags; | |
114 | ||
115 | spin_lock_irqsave(&pci_poke_lock, flags); | |
116 | pci_poke_cpu = smp_processor_id(); | |
117 | pci_poke_in_progress = 1; | |
118 | pci_poke_faulted = 0; | |
119 | __asm__ __volatile__("membar #Sync\n\t" | |
120 | "stba %0, [%1] %2\n\t" | |
121 | "membar #Sync" | |
122 | : /* no outputs */ | |
123 | : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) | |
124 | : "memory"); | |
125 | pci_poke_in_progress = 0; | |
126 | pci_poke_cpu = -1; | |
127 | spin_unlock_irqrestore(&pci_poke_lock, flags); | |
128 | } | |
129 | ||
130 | void pci_config_write16(u16 *addr, u16 val) | |
131 | { | |
132 | unsigned long flags; | |
133 | ||
134 | spin_lock_irqsave(&pci_poke_lock, flags); | |
135 | pci_poke_cpu = smp_processor_id(); | |
136 | pci_poke_in_progress = 1; | |
137 | pci_poke_faulted = 0; | |
138 | __asm__ __volatile__("membar #Sync\n\t" | |
139 | "stha %0, [%1] %2\n\t" | |
140 | "membar #Sync" | |
141 | : /* no outputs */ | |
142 | : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) | |
143 | : "memory"); | |
144 | pci_poke_in_progress = 0; | |
145 | pci_poke_cpu = -1; | |
146 | spin_unlock_irqrestore(&pci_poke_lock, flags); | |
147 | } | |
148 | ||
149 | void pci_config_write32(u32 *addr, u32 val) | |
150 | { | |
151 | unsigned long flags; | |
152 | ||
153 | spin_lock_irqsave(&pci_poke_lock, flags); | |
154 | pci_poke_cpu = smp_processor_id(); | |
155 | pci_poke_in_progress = 1; | |
156 | pci_poke_faulted = 0; | |
157 | __asm__ __volatile__("membar #Sync\n\t" | |
158 | "stwa %0, [%1] %2\n\t" | |
159 | "membar #Sync" | |
160 | : /* no outputs */ | |
161 | : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E_L) | |
162 | : "memory"); | |
163 | pci_poke_in_progress = 0; | |
164 | pci_poke_cpu = -1; | |
165 | spin_unlock_irqrestore(&pci_poke_lock, flags); | |
166 | } | |
167 | ||
5840fc66 DM |
168 | static int ofpci_verbose; |
169 | ||
170 | static int __init ofpci_debug(char *str) | |
171 | { | |
172 | int val = 0; | |
173 | ||
174 | get_option(&str, &val); | |
175 | if (val) | |
176 | ofpci_verbose = 1; | |
177 | return 1; | |
178 | } | |
179 | ||
180 | __setup("ofpci_debug=", ofpci_debug); | |
181 | ||
a2fb23af DM |
182 | static unsigned long pci_parse_of_flags(u32 addr0) |
183 | { | |
184 | unsigned long flags = 0; | |
185 | ||
186 | if (addr0 & 0x02000000) { | |
187 | flags = IORESOURCE_MEM | PCI_BASE_ADDRESS_SPACE_MEMORY; | |
a2fb23af | 188 | flags |= (addr0 >> 28) & PCI_BASE_ADDRESS_MEM_TYPE_1M; |
af86fa40 YL |
189 | if (addr0 & 0x01000000) |
190 | flags |= IORESOURCE_MEM_64 | |
191 | | PCI_BASE_ADDRESS_MEM_TYPE_64; | |
a2fb23af DM |
192 | if (addr0 & 0x40000000) |
193 | flags |= IORESOURCE_PREFETCH | |
194 | | PCI_BASE_ADDRESS_MEM_PREFETCH; | |
195 | } else if (addr0 & 0x01000000) | |
196 | flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO; | |
197 | return flags; | |
198 | } | |
199 | ||
200 | /* The of_device layer has translated all of the assigned-address properties | |
201 | * into physical address resources, we only have to figure out the register | |
202 | * mapping. | |
203 | */ | |
cd4cd730 | 204 | static void pci_parse_of_addrs(struct platform_device *op, |
a2fb23af DM |
205 | struct device_node *node, |
206 | struct pci_dev *dev) | |
207 | { | |
208 | struct resource *op_res; | |
209 | const u32 *addrs; | |
210 | int proplen; | |
211 | ||
212 | addrs = of_get_property(node, "assigned-addresses", &proplen); | |
213 | if (!addrs) | |
214 | return; | |
5840fc66 DM |
215 | if (ofpci_verbose) |
216 | printk(" parse addresses (%d bytes) @ %p\n", | |
217 | proplen, addrs); | |
a2fb23af DM |
218 | op_res = &op->resource[0]; |
219 | for (; proplen >= 20; proplen -= 20, addrs += 5, op_res++) { | |
220 | struct resource *res; | |
221 | unsigned long flags; | |
222 | int i; | |
223 | ||
224 | flags = pci_parse_of_flags(addrs[0]); | |
225 | if (!flags) | |
226 | continue; | |
227 | i = addrs[0] & 0xff; | |
5840fc66 | 228 | if (ofpci_verbose) |
90181136 | 229 | printk(" start: %llx, end: %llx, i: %x\n", |
5840fc66 | 230 | op_res->start, op_res->end, i); |
a2fb23af DM |
231 | |
232 | if (PCI_BASE_ADDRESS_0 <= i && i <= PCI_BASE_ADDRESS_5) { | |
233 | res = &dev->resource[(i - PCI_BASE_ADDRESS_0) >> 2]; | |
234 | } else if (i == dev->rom_base_reg) { | |
235 | res = &dev->resource[PCI_ROM_RESOURCE]; | |
92b19ff5 | 236 | flags |= IORESOURCE_READONLY | IORESOURCE_SIZEALIGN; |
a2fb23af DM |
237 | } else { |
238 | printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i); | |
239 | continue; | |
240 | } | |
241 | res->start = op_res->start; | |
242 | res->end = op_res->end; | |
243 | res->flags = flags; | |
244 | res->name = pci_name(dev); | |
245 | } | |
246 | } | |
247 | ||
77d10d0e DM |
248 | static struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm, |
249 | struct device_node *node, | |
250 | struct pci_bus *bus, int devfn) | |
a2fb23af DM |
251 | { |
252 | struct dev_archdata *sd; | |
cd4cd730 | 253 | struct platform_device *op; |
a2fb23af DM |
254 | struct pci_dev *dev; |
255 | const char *type; | |
01f94c4a | 256 | u32 class; |
a2fb23af | 257 | |
8b1fce04 | 258 | dev = pci_alloc_dev(bus); |
a2fb23af DM |
259 | if (!dev) |
260 | return NULL; | |
261 | ||
262 | sd = &dev->dev.archdata; | |
263 | sd->iommu = pbm->iommu; | |
264 | sd->stc = &pbm->stc; | |
265 | sd->host_controller = pbm; | |
ae05f87e | 266 | sd->op = op = of_find_device_by_node(node); |
c1b1a5f1 | 267 | sd->numa_node = pbm->numa_node; |
a2fb23af | 268 | |
ae05f87e | 269 | sd = &op->dev.archdata; |
ad7ad57c DM |
270 | sd->iommu = pbm->iommu; |
271 | sd->stc = &pbm->stc; | |
c1b1a5f1 | 272 | sd->numa_node = pbm->numa_node; |
ad7ad57c | 273 | |
ae05f87e DM |
274 | if (!strcmp(node->name, "ebus")) |
275 | of_propagate_archdata(op); | |
276 | ||
a2fb23af DM |
277 | type = of_get_property(node, "device_type", NULL); |
278 | if (type == NULL) | |
279 | type = ""; | |
280 | ||
5840fc66 DM |
281 | if (ofpci_verbose) |
282 | printk(" create device, devfn: %x, type: %s\n", | |
283 | devfn, type); | |
a2fb23af | 284 | |
a2fb23af DM |
285 | dev->sysdata = node; |
286 | dev->dev.parent = bus->bridge; | |
287 | dev->dev.bus = &pci_bus_type; | |
98d9f30c | 288 | dev->dev.of_node = of_node_get(node); |
a2fb23af DM |
289 | dev->devfn = devfn; |
290 | dev->multifunction = 0; /* maybe a lie? */ | |
172d2d00 DM |
291 | set_pcie_port_type(dev); |
292 | ||
017ffe64 | 293 | pci_dev_assign_slot(dev); |
c26d3c01 DM |
294 | dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff); |
295 | dev->device = of_getintprop_default(node, "device-id", 0xffff); | |
296 | dev->subsystem_vendor = | |
297 | of_getintprop_default(node, "subsystem-vendor-id", 0); | |
298 | dev->subsystem_device = | |
299 | of_getintprop_default(node, "subsystem-id", 0); | |
300 | ||
301 | dev->cfg_size = pci_cfg_space_size(dev); | |
302 | ||
303 | /* We can't actually use the firmware value, we have | |
304 | * to read what is in the register right now. One | |
305 | * reason is that in the case of IDE interfaces the | |
306 | * firmware can sample the value before the the IDE | |
307 | * interface is programmed into native mode. | |
308 | */ | |
309 | pci_read_config_dword(dev, PCI_CLASS_REVISION, &class); | |
310 | dev->class = class >> 8; | |
311 | dev->revision = class & 0xff; | |
312 | ||
2222c313 | 313 | dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(bus), |
c26d3c01 | 314 | dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn)); |
28f57e77 | 315 | |
5840fc66 DM |
316 | if (ofpci_verbose) |
317 | printk(" class: 0x%x device name: %s\n", | |
318 | dev->class, pci_name(dev)); | |
a2fb23af | 319 | |
861fe906 DM |
320 | /* I have seen IDE devices which will not respond to |
321 | * the bmdma simplex check reads if bus mastering is | |
322 | * disabled. | |
323 | */ | |
324 | if ((dev->class >> 8) == PCI_CLASS_STORAGE_IDE) | |
325 | pci_set_master(dev); | |
326 | ||
de7f2b1b | 327 | dev->current_state = PCI_UNKNOWN; /* unknown power state */ |
a2fb23af | 328 | dev->error_state = pci_channel_io_normal; |
172d2d00 | 329 | dev->dma_mask = 0xffffffff; |
a2fb23af | 330 | |
44b50e5a | 331 | if (!strcmp(node->name, "pci")) { |
c26d3c01 | 332 | /* a PCI-PCI bridge */ |
a2fb23af DM |
333 | dev->hdr_type = PCI_HEADER_TYPE_BRIDGE; |
334 | dev->rom_base_reg = PCI_ROM_ADDRESS1; | |
c26d3c01 DM |
335 | } else if (!strcmp(type, "cardbus")) { |
336 | dev->hdr_type = PCI_HEADER_TYPE_CARDBUS; | |
a2fb23af | 337 | } else { |
c26d3c01 DM |
338 | dev->hdr_type = PCI_HEADER_TYPE_NORMAL; |
339 | dev->rom_base_reg = PCI_ROM_ADDRESS; | |
a2fb23af | 340 | |
1636f8ac | 341 | dev->irq = sd->op->archdata.irqs[0]; |
c26d3c01 DM |
342 | if (dev->irq == 0xffffffff) |
343 | dev->irq = PCI_IRQ_NONE; | |
a2fb23af | 344 | } |
c26d3c01 | 345 | |
a2fb23af DM |
346 | pci_parse_of_addrs(sd->op, node, dev); |
347 | ||
5840fc66 DM |
348 | if (ofpci_verbose) |
349 | printk(" adding to system ...\n"); | |
a2fb23af DM |
350 | |
351 | pci_device_add(dev, bus); | |
352 | ||
353 | return dev; | |
354 | } | |
355 | ||
b7c13f76 | 356 | static void apb_calc_first_last(u8 map, u32 *first_p, u32 *last_p) |
01f94c4a DM |
357 | { |
358 | u32 idx, first, last; | |
359 | ||
360 | first = 8; | |
361 | last = 0; | |
362 | for (idx = 0; idx < 8; idx++) { | |
363 | if ((map & (1 << idx)) != 0) { | |
364 | if (first > idx) | |
365 | first = idx; | |
366 | if (last < idx) | |
367 | last = idx; | |
368 | } | |
369 | } | |
370 | ||
371 | *first_p = first; | |
372 | *last_p = last; | |
373 | } | |
374 | ||
375 | /* Cook up fake bus resources for SUNW,simba PCI bridges which lack | |
376 | * a proper 'ranges' property. | |
377 | */ | |
b7c13f76 SR |
378 | static void apb_fake_ranges(struct pci_dev *dev, |
379 | struct pci_bus *bus, | |
380 | struct pci_pbm_info *pbm) | |
01f94c4a | 381 | { |
a031589b | 382 | struct pci_bus_region region; |
01f94c4a DM |
383 | struct resource *res; |
384 | u32 first, last; | |
385 | u8 map; | |
386 | ||
387 | pci_read_config_byte(dev, APB_IO_ADDRESS_MAP, &map); | |
388 | apb_calc_first_last(map, &first, &last); | |
389 | res = bus->resource[0]; | |
01f94c4a | 390 | res->flags = IORESOURCE_IO; |
a031589b BH |
391 | region.start = (first << 21); |
392 | region.end = (last << 21) + ((1 << 21) - 1); | |
fc279850 | 393 | pcibios_bus_to_resource(dev->bus, res, ®ion); |
01f94c4a DM |
394 | |
395 | pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map); | |
396 | apb_calc_first_last(map, &first, &last); | |
397 | res = bus->resource[1]; | |
01f94c4a | 398 | res->flags = IORESOURCE_MEM; |
557fc587 | 399 | region.start = (first << 29); |
400 | region.end = (last << 29) + ((1 << 29) - 1); | |
fc279850 | 401 | pcibios_bus_to_resource(dev->bus, res, ®ion); |
01f94c4a DM |
402 | } |
403 | ||
b7c13f76 SR |
404 | static void pci_of_scan_bus(struct pci_pbm_info *pbm, |
405 | struct device_node *node, | |
406 | struct pci_bus *bus); | |
a2fb23af DM |
407 | |
408 | #define GET_64BIT(prop, i) ((((u64) (prop)[(i)]) << 32) | (prop)[(i)+1]) | |
409 | ||
b7c13f76 SR |
410 | static void of_scan_pci_bridge(struct pci_pbm_info *pbm, |
411 | struct device_node *node, | |
412 | struct pci_dev *dev) | |
a2fb23af DM |
413 | { |
414 | struct pci_bus *bus; | |
415 | const u32 *busrange, *ranges; | |
01f94c4a | 416 | int len, i, simba; |
a031589b | 417 | struct pci_bus_region region; |
a2fb23af DM |
418 | struct resource *res; |
419 | unsigned int flags; | |
420 | u64 size; | |
421 | ||
5840fc66 DM |
422 | if (ofpci_verbose) |
423 | printk("of_scan_pci_bridge(%s)\n", node->full_name); | |
a2fb23af DM |
424 | |
425 | /* parse bus-range property */ | |
426 | busrange = of_get_property(node, "bus-range", &len); | |
427 | if (busrange == NULL || len != 8) { | |
428 | printk(KERN_DEBUG "Can't get bus-range for PCI-PCI bridge %s\n", | |
429 | node->full_name); | |
430 | return; | |
431 | } | |
93a6423b DM |
432 | |
433 | if (ofpci_verbose) | |
434 | printk(" Bridge bus range [%u --> %u]\n", | |
435 | busrange[0], busrange[1]); | |
436 | ||
a2fb23af | 437 | ranges = of_get_property(node, "ranges", &len); |
01f94c4a | 438 | simba = 0; |
a2fb23af | 439 | if (ranges == NULL) { |
a165b420 | 440 | const char *model = of_get_property(node, "model", NULL); |
8c2786cf | 441 | if (model && !strcmp(model, "SUNW,simba")) |
01f94c4a | 442 | simba = 1; |
a2fb23af DM |
443 | } |
444 | ||
445 | bus = pci_add_new_bus(dev->bus, dev, busrange[0]); | |
446 | if (!bus) { | |
447 | printk(KERN_ERR "Failed to create pci bus for %s\n", | |
448 | node->full_name); | |
449 | return; | |
450 | } | |
451 | ||
452 | bus->primary = dev->bus->number; | |
3f1b540d | 453 | pci_bus_insert_busn_res(bus, busrange[0], busrange[1]); |
a2fb23af DM |
454 | bus->bridge_ctl = 0; |
455 | ||
93a6423b DM |
456 | if (ofpci_verbose) |
457 | printk(" Bridge ranges[%p] simba[%d]\n", | |
458 | ranges, simba); | |
459 | ||
01f94c4a | 460 | /* parse ranges property, or cook one up by hand for Simba */ |
a2fb23af DM |
461 | /* PCI #address-cells == 3 and #size-cells == 2 always */ |
462 | res = &dev->resource[PCI_BRIDGE_RESOURCES]; | |
463 | for (i = 0; i < PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES; ++i) { | |
464 | res->flags = 0; | |
465 | bus->resource[i] = res; | |
466 | ++res; | |
467 | } | |
01f94c4a DM |
468 | if (simba) { |
469 | apb_fake_ranges(dev, bus, pbm); | |
8c2786cf DM |
470 | goto after_ranges; |
471 | } else if (ranges == NULL) { | |
1c975931 | 472 | pci_read_bridge_bases(bus); |
8c2786cf | 473 | goto after_ranges; |
01f94c4a | 474 | } |
a2fb23af DM |
475 | i = 1; |
476 | for (; len >= 32; len -= 32, ranges += 8) { | |
93a6423b DM |
477 | u64 start; |
478 | ||
479 | if (ofpci_verbose) | |
480 | printk(" RAW Range[%08x:%08x:%08x:%08x:%08x:%08x:" | |
481 | "%08x:%08x]\n", | |
482 | ranges[0], ranges[1], ranges[2], ranges[3], | |
483 | ranges[4], ranges[5], ranges[6], ranges[7]); | |
484 | ||
a2fb23af DM |
485 | flags = pci_parse_of_flags(ranges[0]); |
486 | size = GET_64BIT(ranges, 6); | |
487 | if (flags == 0 || size == 0) | |
488 | continue; | |
4afba24e DM |
489 | |
490 | /* On PCI-Express systems, PCI bridges that have no devices downstream | |
491 | * have a bogus size value where the first 32-bit cell is 0xffffffff. | |
492 | * This results in a bogus range where start + size overflows. | |
493 | * | |
494 | * Just skip these otherwise the kernel will complain when the resource | |
495 | * tries to be claimed. | |
496 | */ | |
497 | if (size >> 32 == 0xffffffff) | |
498 | continue; | |
499 | ||
a2fb23af DM |
500 | if (flags & IORESOURCE_IO) { |
501 | res = bus->resource[0]; | |
502 | if (res->flags) { | |
503 | printk(KERN_ERR "PCI: ignoring extra I/O range" | |
504 | " for bridge %s\n", node->full_name); | |
505 | continue; | |
506 | } | |
a2fb23af DM |
507 | } else { |
508 | if (i >= PCI_NUM_RESOURCES - PCI_BRIDGE_RESOURCES) { | |
509 | printk(KERN_ERR "PCI: too many memory ranges" | |
510 | " for bridge %s\n", node->full_name); | |
511 | continue; | |
512 | } | |
513 | res = bus->resource[i]; | |
514 | ++i; | |
a2fb23af DM |
515 | } |
516 | ||
a2fb23af | 517 | res->flags = flags; |
93a6423b | 518 | region.start = start = GET_64BIT(ranges, 1); |
a031589b | 519 | region.end = region.start + size - 1; |
93a6423b DM |
520 | |
521 | if (ofpci_verbose) | |
522 | printk(" Using flags[%08x] start[%016llx] size[%016llx]\n", | |
523 | flags, start, size); | |
524 | ||
fc279850 | 525 | pcibios_bus_to_resource(dev->bus, res, ®ion); |
a2fb23af | 526 | } |
8c2786cf | 527 | after_ranges: |
a2fb23af DM |
528 | sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus), |
529 | bus->number); | |
5840fc66 DM |
530 | if (ofpci_verbose) |
531 | printk(" bus name: %s\n", bus->name); | |
a2fb23af DM |
532 | |
533 | pci_of_scan_bus(pbm, node, bus); | |
534 | } | |
535 | ||
b7c13f76 SR |
536 | static void pci_of_scan_bus(struct pci_pbm_info *pbm, |
537 | struct device_node *node, | |
538 | struct pci_bus *bus) | |
a2fb23af DM |
539 | { |
540 | struct device_node *child; | |
541 | const u32 *reg; | |
2cc7345f | 542 | int reglen, devfn, prev_devfn; |
a2fb23af DM |
543 | struct pci_dev *dev; |
544 | ||
5840fc66 DM |
545 | if (ofpci_verbose) |
546 | printk("PCI: scan_bus[%s] bus no %d\n", | |
547 | node->full_name, bus->number); | |
a2fb23af DM |
548 | |
549 | child = NULL; | |
2cc7345f | 550 | prev_devfn = -1; |
a2fb23af | 551 | while ((child = of_get_next_child(node, child)) != NULL) { |
5840fc66 DM |
552 | if (ofpci_verbose) |
553 | printk(" * %s\n", child->full_name); | |
a2fb23af DM |
554 | reg = of_get_property(child, "reg", ®len); |
555 | if (reg == NULL || reglen < 20) | |
556 | continue; | |
2cc7345f | 557 | |
a2fb23af DM |
558 | devfn = (reg[0] >> 8) & 0xff; |
559 | ||
2cc7345f DM |
560 | /* This is a workaround for some device trees |
561 | * which list PCI devices twice. On the V100 | |
562 | * for example, device number 3 is listed twice. | |
563 | * Once as "pm" and once again as "lomp". | |
564 | */ | |
565 | if (devfn == prev_devfn) | |
566 | continue; | |
567 | prev_devfn = devfn; | |
568 | ||
a2fb23af | 569 | /* create a new pci_dev for this device */ |
c26d3c01 | 570 | dev = of_create_pci_dev(pbm, child, bus, devfn); |
a2fb23af DM |
571 | if (!dev) |
572 | continue; | |
5840fc66 DM |
573 | if (ofpci_verbose) |
574 | printk("PCI: dev header type: %x\n", | |
575 | dev->hdr_type); | |
a2fb23af | 576 | |
2f22e68a | 577 | if (pci_is_bridge(dev)) |
a2fb23af DM |
578 | of_scan_pci_bridge(pbm, child, dev); |
579 | } | |
580 | } | |
581 | ||
582 | static ssize_t | |
583 | show_pciobppath_attr(struct device * dev, struct device_attribute * attr, char * buf) | |
584 | { | |
585 | struct pci_dev *pdev; | |
586 | struct device_node *dp; | |
587 | ||
588 | pdev = to_pci_dev(dev); | |
61c7a080 | 589 | dp = pdev->dev.of_node; |
a2fb23af DM |
590 | |
591 | return snprintf (buf, PAGE_SIZE, "%s\n", dp->full_name); | |
592 | } | |
593 | ||
594 | static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_pciobppath_attr, NULL); | |
595 | ||
b7c13f76 | 596 | static void pci_bus_register_of_sysfs(struct pci_bus *bus) |
a2fb23af DM |
597 | { |
598 | struct pci_dev *dev; | |
a378fd0e | 599 | struct pci_bus *child_bus; |
a2fb23af DM |
600 | int err; |
601 | ||
602 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
603 | /* we don't really care if we can create this file or | |
604 | * not, but we need to assign the result of the call | |
605 | * or the world will fall under alien invasion and | |
606 | * everybody will be frozen on a spaceship ready to be | |
607 | * eaten on alpha centauri by some green and jelly | |
608 | * humanoid. | |
609 | */ | |
610 | err = sysfs_create_file(&dev->dev.kobj, &dev_attr_obppath.attr); | |
c6fee081 | 611 | (void) err; |
a2fb23af | 612 | } |
a378fd0e DM |
613 | list_for_each_entry(child_bus, &bus->children, node) |
614 | pci_bus_register_of_sysfs(child_bus); | |
a2fb23af DM |
615 | } |
616 | ||
f1d25d37 DM |
617 | static void pci_claim_bus_resources(struct pci_bus *bus) |
618 | { | |
619 | struct pci_bus *child_bus; | |
620 | struct pci_dev *dev; | |
621 | ||
622 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
623 | int i; | |
624 | ||
625 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { | |
626 | struct resource *r = &dev->resource[i]; | |
627 | ||
628 | if (r->parent || !r->start || !r->flags) | |
629 | continue; | |
630 | ||
631 | if (ofpci_verbose) | |
632 | printk("PCI: Claiming %s: " | |
633 | "Resource %d: %016llx..%016llx [%x]\n", | |
634 | pci_name(dev), i, | |
635 | (unsigned long long)r->start, | |
636 | (unsigned long long)r->end, | |
637 | (unsigned int)r->flags); | |
638 | ||
d10b730f | 639 | pci_claim_resource(dev, i); |
f1d25d37 DM |
640 | } |
641 | } | |
642 | ||
643 | list_for_each_entry(child_bus, &bus->children, node) | |
644 | pci_claim_bus_resources(child_bus); | |
645 | } | |
646 | ||
b7c13f76 SR |
647 | struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm, |
648 | struct device *parent) | |
a2fb23af | 649 | { |
1a300107 | 650 | LIST_HEAD(resources); |
61c7a080 | 651 | struct device_node *node = pbm->op->dev.of_node; |
a2fb23af DM |
652 | struct pci_bus *bus; |
653 | ||
654 | printk("PCI: Scanning PBM %s\n", node->full_name); | |
655 | ||
ac1edcc5 BH |
656 | pci_add_resource_offset(&resources, &pbm->io_space, |
657 | pbm->io_space.start); | |
658 | pci_add_resource_offset(&resources, &pbm->mem_space, | |
659 | pbm->mem_space.start); | |
af86fa40 YL |
660 | if (pbm->mem64_space.flags) |
661 | pci_add_resource_offset(&resources, &pbm->mem64_space, | |
662 | pbm->mem_space.start); | |
3f1b540d YL |
663 | pbm->busn.start = pbm->pci_first_busno; |
664 | pbm->busn.end = pbm->pci_last_busno; | |
665 | pbm->busn.flags = IORESOURCE_BUS; | |
666 | pci_add_resource(&resources, &pbm->busn); | |
1a300107 BH |
667 | bus = pci_create_root_bus(parent, pbm->pci_first_busno, pbm->pci_ops, |
668 | pbm, &resources); | |
a2fb23af DM |
669 | if (!bus) { |
670 | printk(KERN_ERR "Failed to create bus for %s\n", | |
671 | node->full_name); | |
1a300107 | 672 | pci_free_resource_list(&resources); |
a2fb23af DM |
673 | return NULL; |
674 | } | |
a2fb23af | 675 | |
a2fb23af | 676 | pci_of_scan_bus(pbm, node, bus); |
a2fb23af DM |
677 | pci_bus_register_of_sysfs(bus); |
678 | ||
f1d25d37 | 679 | pci_claim_bus_resources(bus); |
a0c8a4d9 | 680 | pci_bus_add_devices(bus); |
a2fb23af DM |
681 | return bus; |
682 | } | |
683 | ||
b7c13f76 | 684 | void pcibios_fixup_bus(struct pci_bus *pbus) |
1da177e4 | 685 | { |
1da177e4 LT |
686 | } |
687 | ||
3b7a17fc | 688 | resource_size_t pcibios_align_resource(void *data, const struct resource *res, |
b26b2d49 | 689 | resource_size_t size, resource_size_t align) |
1da177e4 | 690 | { |
b26b2d49 | 691 | return res->start; |
1da177e4 LT |
692 | } |
693 | ||
a2fb23af | 694 | int pcibios_enable_device(struct pci_dev *dev, int mask) |
1da177e4 | 695 | { |
a2fb23af DM |
696 | u16 cmd, oldcmd; |
697 | int i; | |
698 | ||
699 | pci_read_config_word(dev, PCI_COMMAND, &cmd); | |
700 | oldcmd = cmd; | |
701 | ||
702 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { | |
703 | struct resource *res = &dev->resource[i]; | |
704 | ||
705 | /* Only set up the requested stuff */ | |
706 | if (!(mask & (1<<i))) | |
707 | continue; | |
708 | ||
709 | if (res->flags & IORESOURCE_IO) | |
710 | cmd |= PCI_COMMAND_IO; | |
711 | if (res->flags & IORESOURCE_MEM) | |
712 | cmd |= PCI_COMMAND_MEMORY; | |
713 | } | |
714 | ||
715 | if (cmd != oldcmd) { | |
716 | printk(KERN_DEBUG "PCI: Enabling device: (%s), cmd %x\n", | |
717 | pci_name(dev), cmd); | |
718 | /* Enable the appropriate bits in the PCI command register. */ | |
719 | pci_write_config_word(dev, PCI_COMMAND, cmd); | |
720 | } | |
1da177e4 LT |
721 | return 0; |
722 | } | |
723 | ||
1da177e4 LT |
724 | /* Platform support for /proc/bus/pci/X/Y mmap()s. */ |
725 | ||
726 | /* If the user uses a host-bridge as the PCI device, he may use | |
727 | * this to perform a raw mmap() of the I/O or MEM space behind | |
728 | * that controller. | |
729 | * | |
730 | * This can be useful for execution of x86 PCI bios initialization code | |
731 | * on a PCI card, like the xfree86 int10 stuff does. | |
732 | */ | |
733 | static int __pci_mmap_make_offset_bus(struct pci_dev *pdev, struct vm_area_struct *vma, | |
734 | enum pci_mmap_state mmap_state) | |
735 | { | |
a2fb23af | 736 | struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; |
1da177e4 LT |
737 | unsigned long space_size, user_offset, user_size; |
738 | ||
3875c5c0 | 739 | if (mmap_state == pci_mmap_io) { |
28f65c11 | 740 | space_size = resource_size(&pbm->io_space); |
1da177e4 | 741 | } else { |
28f65c11 | 742 | space_size = resource_size(&pbm->mem_space); |
1da177e4 LT |
743 | } |
744 | ||
745 | /* Make sure the request is in range. */ | |
746 | user_offset = vma->vm_pgoff << PAGE_SHIFT; | |
747 | user_size = vma->vm_end - vma->vm_start; | |
748 | ||
749 | if (user_offset >= space_size || | |
750 | (user_offset + user_size) > space_size) | |
751 | return -EINVAL; | |
752 | ||
3875c5c0 DM |
753 | if (mmap_state == pci_mmap_io) { |
754 | vma->vm_pgoff = (pbm->io_space.start + | |
755 | user_offset) >> PAGE_SHIFT; | |
1da177e4 | 756 | } else { |
3875c5c0 DM |
757 | vma->vm_pgoff = (pbm->mem_space.start + |
758 | user_offset) >> PAGE_SHIFT; | |
1da177e4 LT |
759 | } |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
bbe0b5eb DM |
764 | /* Adjust vm_pgoff of VMA such that it is the physical page offset |
765 | * corresponding to the 32-bit pci bus offset for DEV requested by the user. | |
1da177e4 LT |
766 | * |
767 | * Basically, the user finds the base address for his device which he wishes | |
768 | * to mmap. They read the 32-bit value from the config space base register, | |
769 | * add whatever PAGE_SIZE multiple offset they wish, and feed this into the | |
770 | * offset parameter of mmap on /proc/bus/pci/XXX for that device. | |
771 | * | |
772 | * Returns negative error code on failure, zero on success. | |
773 | */ | |
bbe0b5eb DM |
774 | static int __pci_mmap_make_offset(struct pci_dev *pdev, |
775 | struct vm_area_struct *vma, | |
1da177e4 LT |
776 | enum pci_mmap_state mmap_state) |
777 | { | |
bbe0b5eb DM |
778 | unsigned long user_paddr, user_size; |
779 | int i, err; | |
1da177e4 | 780 | |
bbe0b5eb DM |
781 | /* First compute the physical address in vma->vm_pgoff, |
782 | * making sure the user offset is within range in the | |
783 | * appropriate PCI space. | |
784 | */ | |
785 | err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state); | |
786 | if (err) | |
787 | return err; | |
788 | ||
789 | /* If this is a mapping on a host bridge, any address | |
790 | * is OK. | |
791 | */ | |
792 | if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST) | |
793 | return err; | |
794 | ||
795 | /* Otherwise make sure it's in the range for one of the | |
796 | * device's resources. | |
797 | */ | |
798 | user_paddr = vma->vm_pgoff << PAGE_SHIFT; | |
799 | user_size = vma->vm_end - vma->vm_start; | |
1da177e4 | 800 | |
1da177e4 | 801 | for (i = 0; i <= PCI_ROM_RESOURCE; i++) { |
bbe0b5eb | 802 | struct resource *rp = &pdev->resource[i]; |
5769907a | 803 | resource_size_t aligned_end; |
1da177e4 LT |
804 | |
805 | /* Active? */ | |
806 | if (!rp->flags) | |
807 | continue; | |
808 | ||
809 | /* Same type? */ | |
810 | if (i == PCI_ROM_RESOURCE) { | |
811 | if (mmap_state != pci_mmap_mem) | |
812 | continue; | |
813 | } else { | |
814 | if ((mmap_state == pci_mmap_io && | |
815 | (rp->flags & IORESOURCE_IO) == 0) || | |
816 | (mmap_state == pci_mmap_mem && | |
817 | (rp->flags & IORESOURCE_MEM) == 0)) | |
818 | continue; | |
819 | } | |
820 | ||
5769907a MD |
821 | /* Align the resource end to the next page address. |
822 | * PAGE_SIZE intentionally added instead of (PAGE_SIZE - 1), | |
823 | * because actually we need the address of the next byte | |
824 | * after rp->end. | |
825 | */ | |
826 | aligned_end = (rp->end + PAGE_SIZE) & PAGE_MASK; | |
827 | ||
bbe0b5eb | 828 | if ((rp->start <= user_paddr) && |
5769907a | 829 | (user_paddr + user_size) <= aligned_end) |
bbe0b5eb | 830 | break; |
1da177e4 LT |
831 | } |
832 | ||
bbe0b5eb | 833 | if (i > PCI_ROM_RESOURCE) |
1da177e4 LT |
834 | return -EINVAL; |
835 | ||
1da177e4 LT |
836 | return 0; |
837 | } | |
838 | ||
1da177e4 LT |
839 | /* Set vm_page_prot of VMA, as appropriate for this architecture, for a pci |
840 | * device mapping. | |
841 | */ | |
842 | static void __pci_mmap_set_pgprot(struct pci_dev *dev, struct vm_area_struct *vma, | |
843 | enum pci_mmap_state mmap_state) | |
844 | { | |
a7a6cac2 | 845 | /* Our io_remap_pfn_range takes care of this, do nothing. */ |
1da177e4 LT |
846 | } |
847 | ||
848 | /* Perform the actual remap of the pages for a PCI device mapping, as appropriate | |
849 | * for this architecture. The region in the process to map is described by vm_start | |
850 | * and vm_end members of VMA, the base physical address is found in vm_pgoff. | |
851 | * The pci device structure is provided so that architectures may make mapping | |
852 | * decisions on a per-device or per-bus basis. | |
853 | * | |
854 | * Returns a negative error code on failure, zero on success. | |
855 | */ | |
856 | int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, | |
857 | enum pci_mmap_state mmap_state, | |
858 | int write_combine) | |
859 | { | |
860 | int ret; | |
861 | ||
862 | ret = __pci_mmap_make_offset(dev, vma, mmap_state); | |
863 | if (ret < 0) | |
864 | return ret; | |
865 | ||
1da177e4 LT |
866 | __pci_mmap_set_pgprot(dev, vma, mmap_state); |
867 | ||
14778d90 | 868 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
1da177e4 LT |
869 | ret = io_remap_pfn_range(vma, vma->vm_start, |
870 | vma->vm_pgoff, | |
871 | vma->vm_end - vma->vm_start, | |
872 | vma->vm_page_prot); | |
873 | if (ret) | |
874 | return ret; | |
875 | ||
1da177e4 LT |
876 | return 0; |
877 | } | |
878 | ||
c1b1a5f1 DM |
879 | #ifdef CONFIG_NUMA |
880 | int pcibus_to_node(struct pci_bus *pbus) | |
881 | { | |
882 | struct pci_pbm_info *pbm = pbus->sysdata; | |
883 | ||
884 | return pbm->numa_node; | |
885 | } | |
886 | EXPORT_SYMBOL(pcibus_to_node); | |
887 | #endif | |
888 | ||
d3ae4b5b | 889 | /* Return the domain number for this pci bus */ |
1da177e4 LT |
890 | |
891 | int pci_domain_nr(struct pci_bus *pbus) | |
892 | { | |
893 | struct pci_pbm_info *pbm = pbus->sysdata; | |
894 | int ret; | |
895 | ||
d3ae4b5b | 896 | if (!pbm) { |
1da177e4 LT |
897 | ret = -ENXIO; |
898 | } else { | |
6c108f12 | 899 | ret = pbm->index; |
1da177e4 LT |
900 | } |
901 | ||
902 | return ret; | |
903 | } | |
904 | EXPORT_SYMBOL(pci_domain_nr); | |
905 | ||
35a17eb6 DM |
906 | #ifdef CONFIG_PCI_MSI |
907 | int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc) | |
908 | { | |
a2fb23af | 909 | struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; |
44ed3c0c | 910 | unsigned int irq; |
35a17eb6 | 911 | |
e9870c4c | 912 | if (!pbm->setup_msi_irq) |
35a17eb6 DM |
913 | return -EINVAL; |
914 | ||
44ed3c0c | 915 | return pbm->setup_msi_irq(&irq, pdev, desc); |
35a17eb6 DM |
916 | } |
917 | ||
44ed3c0c | 918 | void arch_teardown_msi_irq(unsigned int irq) |
35a17eb6 | 919 | { |
394d441b | 920 | struct msi_desc *entry = irq_get_msi_desc(irq); |
3bf15f53 | 921 | struct pci_dev *pdev = msi_desc_to_pci_dev(entry); |
a2fb23af | 922 | struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; |
35a17eb6 | 923 | |
77d10d0e | 924 | if (pbm->teardown_msi_irq) |
44ed3c0c | 925 | pbm->teardown_msi_irq(irq, pdev); |
35a17eb6 DM |
926 | } |
927 | #endif /* !(CONFIG_PCI_MSI) */ | |
928 | ||
ad7ad57c DM |
929 | static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit) |
930 | { | |
931 | struct pci_dev *ali_isa_bridge; | |
932 | u8 val; | |
933 | ||
934 | /* ALI sound chips generate 31-bits of DMA, a special register | |
935 | * determines what bit 31 is emitted as. | |
936 | */ | |
937 | ali_isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, | |
938 | PCI_DEVICE_ID_AL_M1533, | |
939 | NULL); | |
940 | ||
941 | pci_read_config_byte(ali_isa_bridge, 0x7e, &val); | |
942 | if (set_bit) | |
943 | val |= 0x01; | |
944 | else | |
945 | val &= ~0x01; | |
946 | pci_write_config_byte(ali_isa_bridge, 0x7e, val); | |
947 | pci_dev_put(ali_isa_bridge); | |
948 | } | |
949 | ||
ee664a92 | 950 | int pci64_dma_supported(struct pci_dev *pdev, u64 device_mask) |
ad7ad57c DM |
951 | { |
952 | u64 dma_addr_mask; | |
953 | ||
954 | if (pdev == NULL) { | |
955 | dma_addr_mask = 0xffffffff; | |
956 | } else { | |
957 | struct iommu *iommu = pdev->dev.archdata.iommu; | |
958 | ||
959 | dma_addr_mask = iommu->dma_addr_mask; | |
960 | ||
961 | if (pdev->vendor == PCI_VENDOR_ID_AL && | |
962 | pdev->device == PCI_DEVICE_ID_AL_M5451 && | |
963 | device_mask == 0x7fffffff) { | |
964 | ali_sound_dma_hack(pdev, | |
965 | (dma_addr_mask & 0x80000000) != 0); | |
966 | return 1; | |
967 | } | |
968 | } | |
969 | ||
970 | if (device_mask >= (1UL << 32UL)) | |
971 | return 0; | |
972 | ||
973 | return (device_mask & dma_addr_mask) == dma_addr_mask; | |
974 | } | |
975 | ||
bcea1db1 DM |
976 | void pci_resource_to_user(const struct pci_dev *pdev, int bar, |
977 | const struct resource *rp, resource_size_t *start, | |
978 | resource_size_t *end) | |
979 | { | |
980 | struct pci_pbm_info *pbm = pdev->dev.archdata.host_controller; | |
981 | unsigned long offset; | |
982 | ||
983 | if (rp->flags & IORESOURCE_IO) | |
984 | offset = pbm->io_space.start; | |
985 | else | |
986 | offset = pbm->mem_space.start; | |
987 | ||
988 | *start = rp->start - offset; | |
989 | *end = rp->end - offset; | |
990 | } | |
4c0eec7a | 991 | |
ba232a1f MS |
992 | void pcibios_set_master(struct pci_dev *dev) |
993 | { | |
994 | /* No special bus mastering setup handling */ | |
995 | } | |
996 | ||
4c0eec7a TH |
997 | static int __init pcibios_init(void) |
998 | { | |
999 | pci_dfl_cache_line_size = 64 >> 2; | |
1000 | return 0; | |
1001 | } | |
1002 | subsys_initcall(pcibios_init); | |
2ef2d747 DM |
1003 | |
1004 | #ifdef CONFIG_SYSFS | |
f0c1a117 ES |
1005 | |
1006 | #define SLOT_NAME_SIZE 11 /* Max decimal digits + null in u32 */ | |
1007 | ||
1008 | static void pcie_bus_slot_names(struct pci_bus *pbus) | |
1009 | { | |
1010 | struct pci_dev *pdev; | |
1011 | struct pci_bus *bus; | |
1012 | ||
1013 | list_for_each_entry(pdev, &pbus->devices, bus_list) { | |
1014 | char name[SLOT_NAME_SIZE]; | |
1015 | struct pci_slot *pci_slot; | |
1016 | const u32 *slot_num; | |
1017 | int len; | |
1018 | ||
1019 | slot_num = of_get_property(pdev->dev.of_node, | |
1020 | "physical-slot#", &len); | |
1021 | ||
1022 | if (slot_num == NULL || len != 4) | |
1023 | continue; | |
1024 | ||
1025 | snprintf(name, sizeof(name), "%u", slot_num[0]); | |
1026 | pci_slot = pci_create_slot(pbus, slot_num[0], name, NULL); | |
1027 | ||
1028 | if (IS_ERR(pci_slot)) | |
1029 | pr_err("PCI: pci_create_slot returned %ld.\n", | |
1030 | PTR_ERR(pci_slot)); | |
1031 | } | |
1032 | ||
1033 | list_for_each_entry(bus, &pbus->children, node) | |
1034 | pcie_bus_slot_names(bus); | |
1035 | } | |
1036 | ||
b7c13f76 | 1037 | static void pci_bus_slot_names(struct device_node *node, struct pci_bus *bus) |
2ef2d747 DM |
1038 | { |
1039 | const struct pci_slot_names { | |
1040 | u32 slot_mask; | |
1041 | char names[0]; | |
1042 | } *prop; | |
1043 | const char *sp; | |
1044 | int len, i; | |
1045 | u32 mask; | |
1046 | ||
1047 | prop = of_get_property(node, "slot-names", &len); | |
1048 | if (!prop) | |
1049 | return; | |
1050 | ||
1051 | mask = prop->slot_mask; | |
1052 | sp = prop->names; | |
1053 | ||
1054 | if (ofpci_verbose) | |
1055 | printk("PCI: Making slots for [%s] mask[0x%02x]\n", | |
1056 | node->full_name, mask); | |
1057 | ||
1058 | i = 0; | |
1059 | while (mask) { | |
1060 | struct pci_slot *pci_slot; | |
1061 | u32 this_bit = 1 << i; | |
1062 | ||
1063 | if (!(mask & this_bit)) { | |
1064 | i++; | |
1065 | continue; | |
1066 | } | |
1067 | ||
1068 | if (ofpci_verbose) | |
1069 | printk("PCI: Making slot [%s]\n", sp); | |
1070 | ||
1071 | pci_slot = pci_create_slot(bus, i, sp, NULL); | |
1072 | if (IS_ERR(pci_slot)) | |
1073 | printk(KERN_ERR "PCI: pci_create_slot returned %ld\n", | |
1074 | PTR_ERR(pci_slot)); | |
1075 | ||
1076 | sp += strlen(sp) + 1; | |
1077 | mask &= ~this_bit; | |
1078 | i++; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | static int __init of_pci_slot_init(void) | |
1083 | { | |
1084 | struct pci_bus *pbus = NULL; | |
1085 | ||
1086 | while ((pbus = pci_find_next_bus(pbus)) != NULL) { | |
1087 | struct device_node *node; | |
f0c1a117 ES |
1088 | struct pci_dev *pdev; |
1089 | ||
1090 | pdev = list_first_entry(&pbus->devices, struct pci_dev, | |
1091 | bus_list); | |
2ef2d747 | 1092 | |
f0c1a117 ES |
1093 | if (pdev && pci_is_pcie(pdev)) { |
1094 | pcie_bus_slot_names(pbus); | |
2ef2d747 | 1095 | } else { |
2ef2d747 | 1096 | |
f0c1a117 ES |
1097 | if (pbus->self) { |
1098 | ||
1099 | /* PCI->PCI bridge */ | |
1100 | node = pbus->self->dev.of_node; | |
1101 | ||
1102 | } else { | |
1103 | struct pci_pbm_info *pbm = pbus->sysdata; | |
2ef2d747 | 1104 | |
f0c1a117 ES |
1105 | /* Host PCI controller */ |
1106 | node = pbm->op->dev.of_node; | |
1107 | } | |
1108 | ||
1109 | pci_bus_slot_names(node, pbus); | |
1110 | } | |
2ef2d747 DM |
1111 | } |
1112 | ||
1113 | return 0; | |
1114 | } | |
1b925b57 | 1115 | device_initcall(of_pci_slot_init); |
2ef2d747 | 1116 | #endif |