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5516b540 KG |
1 | /* |
2 | * Contains common pci routines for ALL ppc platform | |
cf1d8a8a KG |
3 | * (based on pci_32.c and pci_64.c) |
4 | * | |
5 | * Port for PPC64 David Engebretsen, IBM Corp. | |
6 | * Contains common pci routines for ppc64 platform, pSeries and iSeries brands. | |
7 | * | |
8 | * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM | |
9 | * Rework, based on alpha PCI code. | |
10 | * | |
11 | * Common pmac/prep/chrp pci routines. -- Cort | |
5516b540 KG |
12 | * |
13 | * This program is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU General Public License | |
15 | * as published by the Free Software Foundation; either version | |
16 | * 2 of the License, or (at your option) any later version. | |
17 | */ | |
18 | ||
5516b540 KG |
19 | #include <linux/kernel.h> |
20 | #include <linux/pci.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/init.h> | |
d92a208d | 23 | #include <linux/delay.h> |
66b15db6 | 24 | #include <linux/export.h> |
22ae782f | 25 | #include <linux/of_address.h> |
04bea68b | 26 | #include <linux/of_pci.h> |
5516b540 KG |
27 | #include <linux/mm.h> |
28 | #include <linux/list.h> | |
29 | #include <linux/syscalls.h> | |
30 | #include <linux/irq.h> | |
31 | #include <linux/vmalloc.h> | |
5a0e3ad6 | 32 | #include <linux/slab.h> |
c2e1d845 | 33 | #include <linux/vgaarb.h> |
5516b540 KG |
34 | |
35 | #include <asm/processor.h> | |
36 | #include <asm/io.h> | |
37 | #include <asm/prom.h> | |
38 | #include <asm/pci-bridge.h> | |
39 | #include <asm/byteorder.h> | |
40 | #include <asm/machdep.h> | |
41 | #include <asm/ppc-pci.h> | |
8b8da358 | 42 | #include <asm/eeh.h> |
5516b540 | 43 | |
a4c9e328 | 44 | static DEFINE_SPINLOCK(hose_spinlock); |
c3bd517d | 45 | LIST_HEAD(hose_list); |
a4c9e328 KG |
46 | |
47 | /* XXX kill that some day ... */ | |
ebfc00f7 | 48 | static int global_phb_number; /* Global phb counter */ |
a4c9e328 | 49 | |
25e81f92 BH |
50 | /* ISA Memory physical address */ |
51 | resource_size_t isa_mem_base; | |
52 | ||
a4c9e328 | 53 | |
45223c54 | 54 | static struct dma_map_ops *pci_dma_ops = &dma_direct_ops; |
4fc665b8 | 55 | |
45223c54 | 56 | void set_pci_dma_ops(struct dma_map_ops *dma_ops) |
4fc665b8 BB |
57 | { |
58 | pci_dma_ops = dma_ops; | |
59 | } | |
60 | ||
45223c54 | 61 | struct dma_map_ops *get_pci_dma_ops(void) |
4fc665b8 BB |
62 | { |
63 | return pci_dma_ops; | |
64 | } | |
65 | EXPORT_SYMBOL(get_pci_dma_ops); | |
66 | ||
e60516e3 | 67 | struct pci_controller *pcibios_alloc_controller(struct device_node *dev) |
a4c9e328 KG |
68 | { |
69 | struct pci_controller *phb; | |
70 | ||
e60516e3 | 71 | phb = zalloc_maybe_bootmem(sizeof(struct pci_controller), GFP_KERNEL); |
a4c9e328 KG |
72 | if (phb == NULL) |
73 | return NULL; | |
e60516e3 SR |
74 | spin_lock(&hose_spinlock); |
75 | phb->global_number = global_phb_number++; | |
76 | list_add_tail(&phb->list_node, &hose_list); | |
77 | spin_unlock(&hose_spinlock); | |
44ef3390 | 78 | phb->dn = dev; |
f691fa10 | 79 | phb->is_dynamic = slab_is_available(); |
a4c9e328 KG |
80 | #ifdef CONFIG_PPC64 |
81 | if (dev) { | |
82 | int nid = of_node_to_nid(dev); | |
83 | ||
84 | if (nid < 0 || !node_online(nid)) | |
85 | nid = -1; | |
86 | ||
87 | PHB_SET_NODE(phb, nid); | |
88 | } | |
89 | #endif | |
90 | return phb; | |
91 | } | |
92 | ||
93 | void pcibios_free_controller(struct pci_controller *phb) | |
94 | { | |
95 | spin_lock(&hose_spinlock); | |
96 | list_del(&phb->list_node); | |
97 | spin_unlock(&hose_spinlock); | |
98 | ||
99 | if (phb->is_dynamic) | |
100 | kfree(phb); | |
101 | } | |
102 | ||
4c2245bb GS |
103 | /* |
104 | * The function is used to return the minimal alignment | |
105 | * for memory or I/O windows of the associated P2P bridge. | |
106 | * By default, 4KiB alignment for I/O windows and 1MiB for | |
107 | * memory windows. | |
108 | */ | |
109 | resource_size_t pcibios_window_alignment(struct pci_bus *bus, | |
110 | unsigned long type) | |
111 | { | |
467efc2e DA |
112 | struct pci_controller *phb = pci_bus_to_host(bus); |
113 | ||
114 | if (phb->controller_ops.window_alignment) | |
115 | return phb->controller_ops.window_alignment(bus, type); | |
116 | ||
117 | /* | |
118 | * PCI core will figure out the default | |
119 | * alignment: 4KiB for I/O and 1MiB for | |
120 | * memory window. | |
121 | */ | |
122 | return 1; | |
4c2245bb GS |
123 | } |
124 | ||
d92a208d GS |
125 | void pcibios_reset_secondary_bus(struct pci_dev *dev) |
126 | { | |
467efc2e DA |
127 | struct pci_controller *phb = pci_bus_to_host(dev->bus); |
128 | ||
129 | if (phb->controller_ops.reset_secondary_bus) { | |
130 | phb->controller_ops.reset_secondary_bus(dev); | |
131 | return; | |
132 | } | |
133 | ||
134 | pci_reset_secondary_bus(dev); | |
d92a208d GS |
135 | } |
136 | ||
5350ab3f WY |
137 | #ifdef CONFIG_PCI_IOV |
138 | resource_size_t pcibios_iov_resource_alignment(struct pci_dev *pdev, int resno) | |
139 | { | |
140 | if (ppc_md.pcibios_iov_resource_alignment) | |
141 | return ppc_md.pcibios_iov_resource_alignment(pdev, resno); | |
142 | ||
143 | return pci_iov_resource_size(pdev, resno); | |
144 | } | |
145 | #endif /* CONFIG_PCI_IOV */ | |
146 | ||
c3bd517d MM |
147 | static resource_size_t pcibios_io_size(const struct pci_controller *hose) |
148 | { | |
149 | #ifdef CONFIG_PPC64 | |
150 | return hose->pci_io_size; | |
151 | #else | |
28f65c11 | 152 | return resource_size(&hose->io_resource); |
c3bd517d MM |
153 | #endif |
154 | } | |
155 | ||
6dfbde20 BH |
156 | int pcibios_vaddr_is_ioport(void __iomem *address) |
157 | { | |
158 | int ret = 0; | |
159 | struct pci_controller *hose; | |
c3bd517d | 160 | resource_size_t size; |
6dfbde20 BH |
161 | |
162 | spin_lock(&hose_spinlock); | |
163 | list_for_each_entry(hose, &hose_list, list_node) { | |
c3bd517d | 164 | size = pcibios_io_size(hose); |
6dfbde20 BH |
165 | if (address >= hose->io_base_virt && |
166 | address < (hose->io_base_virt + size)) { | |
167 | ret = 1; | |
168 | break; | |
169 | } | |
170 | } | |
171 | spin_unlock(&hose_spinlock); | |
172 | return ret; | |
173 | } | |
174 | ||
c3bd517d MM |
175 | unsigned long pci_address_to_pio(phys_addr_t address) |
176 | { | |
177 | struct pci_controller *hose; | |
178 | resource_size_t size; | |
179 | unsigned long ret = ~0; | |
180 | ||
181 | spin_lock(&hose_spinlock); | |
182 | list_for_each_entry(hose, &hose_list, list_node) { | |
183 | size = pcibios_io_size(hose); | |
184 | if (address >= hose->io_base_phys && | |
185 | address < (hose->io_base_phys + size)) { | |
186 | unsigned long base = | |
187 | (unsigned long)hose->io_base_virt - _IO_BASE; | |
188 | ret = base + (address - hose->io_base_phys); | |
189 | break; | |
190 | } | |
191 | } | |
192 | spin_unlock(&hose_spinlock); | |
193 | ||
194 | return ret; | |
195 | } | |
196 | EXPORT_SYMBOL_GPL(pci_address_to_pio); | |
197 | ||
5516b540 KG |
198 | /* |
199 | * Return the domain number for this bus. | |
200 | */ | |
201 | int pci_domain_nr(struct pci_bus *bus) | |
202 | { | |
6207e816 | 203 | struct pci_controller *hose = pci_bus_to_host(bus); |
5516b540 | 204 | |
6207e816 | 205 | return hose->global_number; |
5516b540 | 206 | } |
5516b540 | 207 | EXPORT_SYMBOL(pci_domain_nr); |
58083dad | 208 | |
a4c9e328 KG |
209 | /* This routine is meant to be used early during boot, when the |
210 | * PCI bus numbers have not yet been assigned, and you need to | |
211 | * issue PCI config cycles to an OF device. | |
212 | * It could also be used to "fix" RTAS config cycles if you want | |
213 | * to set pci_assign_all_buses to 1 and still use RTAS for PCI | |
214 | * config cycles. | |
215 | */ | |
216 | struct pci_controller* pci_find_hose_for_OF_device(struct device_node* node) | |
217 | { | |
a4c9e328 KG |
218 | while(node) { |
219 | struct pci_controller *hose, *tmp; | |
220 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) | |
44ef3390 | 221 | if (hose->dn == node) |
a4c9e328 KG |
222 | return hose; |
223 | node = node->parent; | |
224 | } | |
225 | return NULL; | |
226 | } | |
227 | ||
58083dad KG |
228 | /* |
229 | * Reads the interrupt pin to determine if interrupt is use by card. | |
230 | * If the interrupt is used, then gets the interrupt line from the | |
231 | * openfirmware and sets it in the pci_dev and pci_config line. | |
232 | */ | |
4666ca2a | 233 | static int pci_read_irq_line(struct pci_dev *pci_dev) |
58083dad | 234 | { |
530210c7 | 235 | struct of_phandle_args oirq; |
58083dad KG |
236 | unsigned int virq; |
237 | ||
b0494bc8 | 238 | pr_debug("PCI: Try to map irq for %s...\n", pci_name(pci_dev)); |
58083dad KG |
239 | |
240 | #ifdef DEBUG | |
241 | memset(&oirq, 0xff, sizeof(oirq)); | |
242 | #endif | |
243 | /* Try to get a mapping from the device-tree */ | |
0c02c800 | 244 | if (of_irq_parse_pci(pci_dev, &oirq)) { |
58083dad KG |
245 | u8 line, pin; |
246 | ||
247 | /* If that fails, lets fallback to what is in the config | |
248 | * space and map that through the default controller. We | |
249 | * also set the type to level low since that's what PCI | |
250 | * interrupts are. If your platform does differently, then | |
251 | * either provide a proper interrupt tree or don't use this | |
252 | * function. | |
253 | */ | |
254 | if (pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &pin)) | |
255 | return -1; | |
256 | if (pin == 0) | |
257 | return -1; | |
258 | if (pci_read_config_byte(pci_dev, PCI_INTERRUPT_LINE, &line) || | |
54a24cbb | 259 | line == 0xff || line == 0) { |
58083dad KG |
260 | return -1; |
261 | } | |
b0494bc8 BH |
262 | pr_debug(" No map ! Using line %d (pin %d) from PCI config\n", |
263 | line, pin); | |
58083dad KG |
264 | |
265 | virq = irq_create_mapping(NULL, line); | |
266 | if (virq != NO_IRQ) | |
ec775d0e | 267 | irq_set_irq_type(virq, IRQ_TYPE_LEVEL_LOW); |
58083dad | 268 | } else { |
b0494bc8 | 269 | pr_debug(" Got one, spec %d cells (0x%08x 0x%08x...) on %s\n", |
530210c7 GL |
270 | oirq.args_count, oirq.args[0], oirq.args[1], |
271 | of_node_full_name(oirq.np)); | |
58083dad | 272 | |
e6d30ab1 | 273 | virq = irq_create_of_mapping(&oirq); |
58083dad KG |
274 | } |
275 | if(virq == NO_IRQ) { | |
b0494bc8 | 276 | pr_debug(" Failed to map !\n"); |
58083dad KG |
277 | return -1; |
278 | } | |
279 | ||
b0494bc8 | 280 | pr_debug(" Mapped to linux irq %d\n", virq); |
58083dad KG |
281 | |
282 | pci_dev->irq = virq; | |
283 | ||
284 | return 0; | |
285 | } | |
58083dad KG |
286 | |
287 | /* | |
288 | * Platform support for /proc/bus/pci/X/Y mmap()s, | |
289 | * modelled on the sparc64 implementation by Dave Miller. | |
290 | * -- paulus. | |
291 | */ | |
292 | ||
293 | /* | |
294 | * Adjust vm_pgoff of VMA such that it is the physical page offset | |
295 | * corresponding to the 32-bit pci bus offset for DEV requested by the user. | |
296 | * | |
297 | * Basically, the user finds the base address for his device which he wishes | |
298 | * to mmap. They read the 32-bit value from the config space base register, | |
299 | * add whatever PAGE_SIZE multiple offset they wish, and feed this into the | |
300 | * offset parameter of mmap on /proc/bus/pci/XXX for that device. | |
301 | * | |
302 | * Returns negative error code on failure, zero on success. | |
303 | */ | |
304 | static struct resource *__pci_mmap_make_offset(struct pci_dev *dev, | |
305 | resource_size_t *offset, | |
306 | enum pci_mmap_state mmap_state) | |
307 | { | |
308 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
309 | unsigned long io_offset = 0; | |
310 | int i, res_bit; | |
311 | ||
b0d436c7 | 312 | if (hose == NULL) |
58083dad KG |
313 | return NULL; /* should never happen */ |
314 | ||
315 | /* If memory, add on the PCI bridge address offset */ | |
316 | if (mmap_state == pci_mmap_mem) { | |
317 | #if 0 /* See comment in pci_resource_to_user() for why this is disabled */ | |
318 | *offset += hose->pci_mem_offset; | |
319 | #endif | |
320 | res_bit = IORESOURCE_MEM; | |
321 | } else { | |
322 | io_offset = (unsigned long)hose->io_base_virt - _IO_BASE; | |
323 | *offset += io_offset; | |
324 | res_bit = IORESOURCE_IO; | |
325 | } | |
326 | ||
327 | /* | |
328 | * Check that the offset requested corresponds to one of the | |
329 | * resources of the device. | |
330 | */ | |
331 | for (i = 0; i <= PCI_ROM_RESOURCE; i++) { | |
332 | struct resource *rp = &dev->resource[i]; | |
333 | int flags = rp->flags; | |
334 | ||
335 | /* treat ROM as memory (should be already) */ | |
336 | if (i == PCI_ROM_RESOURCE) | |
337 | flags |= IORESOURCE_MEM; | |
338 | ||
339 | /* Active and same type? */ | |
340 | if ((flags & res_bit) == 0) | |
341 | continue; | |
342 | ||
343 | /* In the range of this resource? */ | |
344 | if (*offset < (rp->start & PAGE_MASK) || *offset > rp->end) | |
345 | continue; | |
346 | ||
347 | /* found it! construct the final physical address */ | |
348 | if (mmap_state == pci_mmap_io) | |
349 | *offset += hose->io_base_phys - io_offset; | |
350 | return rp; | |
351 | } | |
352 | ||
353 | return NULL; | |
354 | } | |
355 | ||
356 | /* | |
357 | * Set vm_page_prot of VMA, as appropriate for this architecture, for a pci | |
358 | * device mapping. | |
359 | */ | |
360 | static pgprot_t __pci_mmap_set_pgprot(struct pci_dev *dev, struct resource *rp, | |
361 | pgprot_t protection, | |
362 | enum pci_mmap_state mmap_state, | |
363 | int write_combine) | |
364 | { | |
58083dad KG |
365 | |
366 | /* Write combine is always 0 on non-memory space mappings. On | |
367 | * memory space, if the user didn't pass 1, we check for a | |
368 | * "prefetchable" resource. This is a bit hackish, but we use | |
369 | * this to workaround the inability of /sysfs to provide a write | |
370 | * combine bit | |
371 | */ | |
372 | if (mmap_state != pci_mmap_mem) | |
373 | write_combine = 0; | |
374 | else if (write_combine == 0) { | |
375 | if (rp->flags & IORESOURCE_PREFETCH) | |
376 | write_combine = 1; | |
377 | } | |
378 | ||
379 | /* XXX would be nice to have a way to ask for write-through */ | |
58083dad | 380 | if (write_combine) |
83d5e64b | 381 | return pgprot_noncached_wc(protection); |
58083dad | 382 | else |
83d5e64b | 383 | return pgprot_noncached(protection); |
58083dad KG |
384 | } |
385 | ||
386 | /* | |
387 | * This one is used by /dev/mem and fbdev who have no clue about the | |
388 | * PCI device, it tries to find the PCI device first and calls the | |
389 | * above routine | |
390 | */ | |
391 | pgprot_t pci_phys_mem_access_prot(struct file *file, | |
392 | unsigned long pfn, | |
393 | unsigned long size, | |
64b3d0e8 | 394 | pgprot_t prot) |
58083dad KG |
395 | { |
396 | struct pci_dev *pdev = NULL; | |
397 | struct resource *found = NULL; | |
7c12d906 | 398 | resource_size_t offset = ((resource_size_t)pfn) << PAGE_SHIFT; |
58083dad KG |
399 | int i; |
400 | ||
401 | if (page_is_ram(pfn)) | |
64b3d0e8 | 402 | return prot; |
58083dad | 403 | |
64b3d0e8 | 404 | prot = pgprot_noncached(prot); |
58083dad KG |
405 | for_each_pci_dev(pdev) { |
406 | for (i = 0; i <= PCI_ROM_RESOURCE; i++) { | |
407 | struct resource *rp = &pdev->resource[i]; | |
408 | int flags = rp->flags; | |
409 | ||
410 | /* Active and same type? */ | |
411 | if ((flags & IORESOURCE_MEM) == 0) | |
412 | continue; | |
413 | /* In the range of this resource? */ | |
414 | if (offset < (rp->start & PAGE_MASK) || | |
415 | offset > rp->end) | |
416 | continue; | |
417 | found = rp; | |
418 | break; | |
419 | } | |
420 | if (found) | |
421 | break; | |
422 | } | |
423 | if (found) { | |
424 | if (found->flags & IORESOURCE_PREFETCH) | |
64b3d0e8 | 425 | prot = pgprot_noncached_wc(prot); |
58083dad KG |
426 | pci_dev_put(pdev); |
427 | } | |
428 | ||
b0494bc8 | 429 | pr_debug("PCI: Non-PCI map for %llx, prot: %lx\n", |
64b3d0e8 | 430 | (unsigned long long)offset, pgprot_val(prot)); |
58083dad | 431 | |
64b3d0e8 | 432 | return prot; |
58083dad KG |
433 | } |
434 | ||
435 | ||
436 | /* | |
437 | * Perform the actual remap of the pages for a PCI device mapping, as | |
438 | * appropriate for this architecture. The region in the process to map | |
439 | * is described by vm_start and vm_end members of VMA, the base physical | |
440 | * address is found in vm_pgoff. | |
441 | * The pci device structure is provided so that architectures may make mapping | |
442 | * decisions on a per-device or per-bus basis. | |
443 | * | |
444 | * Returns a negative error code on failure, zero on success. | |
445 | */ | |
446 | int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, | |
447 | enum pci_mmap_state mmap_state, int write_combine) | |
448 | { | |
7c12d906 BH |
449 | resource_size_t offset = |
450 | ((resource_size_t)vma->vm_pgoff) << PAGE_SHIFT; | |
58083dad KG |
451 | struct resource *rp; |
452 | int ret; | |
453 | ||
454 | rp = __pci_mmap_make_offset(dev, &offset, mmap_state); | |
455 | if (rp == NULL) | |
456 | return -EINVAL; | |
457 | ||
458 | vma->vm_pgoff = offset >> PAGE_SHIFT; | |
459 | vma->vm_page_prot = __pci_mmap_set_pgprot(dev, rp, | |
460 | vma->vm_page_prot, | |
461 | mmap_state, write_combine); | |
462 | ||
463 | ret = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, | |
464 | vma->vm_end - vma->vm_start, vma->vm_page_prot); | |
465 | ||
466 | return ret; | |
467 | } | |
468 | ||
e9f82cb7 BH |
469 | /* This provides legacy IO read access on a bus */ |
470 | int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val, size_t size) | |
471 | { | |
472 | unsigned long offset; | |
473 | struct pci_controller *hose = pci_bus_to_host(bus); | |
474 | struct resource *rp = &hose->io_resource; | |
475 | void __iomem *addr; | |
476 | ||
477 | /* Check if port can be supported by that bus. We only check | |
478 | * the ranges of the PHB though, not the bus itself as the rules | |
479 | * for forwarding legacy cycles down bridges are not our problem | |
480 | * here. So if the host bridge supports it, we do it. | |
481 | */ | |
482 | offset = (unsigned long)hose->io_base_virt - _IO_BASE; | |
483 | offset += port; | |
484 | ||
485 | if (!(rp->flags & IORESOURCE_IO)) | |
486 | return -ENXIO; | |
487 | if (offset < rp->start || (offset + size) > rp->end) | |
488 | return -ENXIO; | |
489 | addr = hose->io_base_virt + port; | |
490 | ||
491 | switch(size) { | |
492 | case 1: | |
493 | *((u8 *)val) = in_8(addr); | |
494 | return 1; | |
495 | case 2: | |
496 | if (port & 1) | |
497 | return -EINVAL; | |
498 | *((u16 *)val) = in_le16(addr); | |
499 | return 2; | |
500 | case 4: | |
501 | if (port & 3) | |
502 | return -EINVAL; | |
503 | *((u32 *)val) = in_le32(addr); | |
504 | return 4; | |
505 | } | |
506 | return -EINVAL; | |
507 | } | |
508 | ||
509 | /* This provides legacy IO write access on a bus */ | |
510 | int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val, size_t size) | |
511 | { | |
512 | unsigned long offset; | |
513 | struct pci_controller *hose = pci_bus_to_host(bus); | |
514 | struct resource *rp = &hose->io_resource; | |
515 | void __iomem *addr; | |
516 | ||
517 | /* Check if port can be supported by that bus. We only check | |
518 | * the ranges of the PHB though, not the bus itself as the rules | |
519 | * for forwarding legacy cycles down bridges are not our problem | |
520 | * here. So if the host bridge supports it, we do it. | |
521 | */ | |
522 | offset = (unsigned long)hose->io_base_virt - _IO_BASE; | |
523 | offset += port; | |
524 | ||
525 | if (!(rp->flags & IORESOURCE_IO)) | |
526 | return -ENXIO; | |
527 | if (offset < rp->start || (offset + size) > rp->end) | |
528 | return -ENXIO; | |
529 | addr = hose->io_base_virt + port; | |
530 | ||
531 | /* WARNING: The generic code is idiotic. It gets passed a pointer | |
532 | * to what can be a 1, 2 or 4 byte quantity and always reads that | |
533 | * as a u32, which means that we have to correct the location of | |
534 | * the data read within those 32 bits for size 1 and 2 | |
535 | */ | |
536 | switch(size) { | |
537 | case 1: | |
538 | out_8(addr, val >> 24); | |
539 | return 1; | |
540 | case 2: | |
541 | if (port & 1) | |
542 | return -EINVAL; | |
543 | out_le16(addr, val >> 16); | |
544 | return 2; | |
545 | case 4: | |
546 | if (port & 3) | |
547 | return -EINVAL; | |
548 | out_le32(addr, val); | |
549 | return 4; | |
550 | } | |
551 | return -EINVAL; | |
552 | } | |
553 | ||
554 | /* This provides legacy IO or memory mmap access on a bus */ | |
555 | int pci_mmap_legacy_page_range(struct pci_bus *bus, | |
556 | struct vm_area_struct *vma, | |
557 | enum pci_mmap_state mmap_state) | |
558 | { | |
559 | struct pci_controller *hose = pci_bus_to_host(bus); | |
560 | resource_size_t offset = | |
561 | ((resource_size_t)vma->vm_pgoff) << PAGE_SHIFT; | |
562 | resource_size_t size = vma->vm_end - vma->vm_start; | |
563 | struct resource *rp; | |
564 | ||
565 | pr_debug("pci_mmap_legacy_page_range(%04x:%02x, %s @%llx..%llx)\n", | |
566 | pci_domain_nr(bus), bus->number, | |
567 | mmap_state == pci_mmap_mem ? "MEM" : "IO", | |
568 | (unsigned long long)offset, | |
569 | (unsigned long long)(offset + size - 1)); | |
570 | ||
571 | if (mmap_state == pci_mmap_mem) { | |
5b11abfd BH |
572 | /* Hack alert ! |
573 | * | |
574 | * Because X is lame and can fail starting if it gets an error trying | |
575 | * to mmap legacy_mem (instead of just moving on without legacy memory | |
576 | * access) we fake it here by giving it anonymous memory, effectively | |
577 | * behaving just like /dev/zero | |
578 | */ | |
579 | if ((offset + size) > hose->isa_mem_size) { | |
580 | printk(KERN_DEBUG | |
581 | "Process %s (pid:%d) mapped non-existing PCI legacy memory for 0%04x:%02x\n", | |
582 | current->comm, current->pid, pci_domain_nr(bus), bus->number); | |
583 | if (vma->vm_flags & VM_SHARED) | |
584 | return shmem_zero_setup(vma); | |
585 | return 0; | |
586 | } | |
e9f82cb7 BH |
587 | offset += hose->isa_mem_phys; |
588 | } else { | |
589 | unsigned long io_offset = (unsigned long)hose->io_base_virt - _IO_BASE; | |
590 | unsigned long roffset = offset + io_offset; | |
591 | rp = &hose->io_resource; | |
592 | if (!(rp->flags & IORESOURCE_IO)) | |
593 | return -ENXIO; | |
594 | if (roffset < rp->start || (roffset + size) > rp->end) | |
595 | return -ENXIO; | |
596 | offset += hose->io_base_phys; | |
597 | } | |
598 | pr_debug(" -> mapping phys %llx\n", (unsigned long long)offset); | |
599 | ||
600 | vma->vm_pgoff = offset >> PAGE_SHIFT; | |
64b3d0e8 | 601 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); |
e9f82cb7 BH |
602 | return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, |
603 | vma->vm_end - vma->vm_start, | |
604 | vma->vm_page_prot); | |
605 | } | |
606 | ||
58083dad KG |
607 | void pci_resource_to_user(const struct pci_dev *dev, int bar, |
608 | const struct resource *rsrc, | |
609 | resource_size_t *start, resource_size_t *end) | |
610 | { | |
611 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
612 | resource_size_t offset = 0; | |
613 | ||
614 | if (hose == NULL) | |
615 | return; | |
616 | ||
617 | if (rsrc->flags & IORESOURCE_IO) | |
618 | offset = (unsigned long)hose->io_base_virt - _IO_BASE; | |
619 | ||
620 | /* We pass a fully fixed up address to userland for MMIO instead of | |
621 | * a BAR value because X is lame and expects to be able to use that | |
622 | * to pass to /dev/mem ! | |
623 | * | |
624 | * That means that we'll have potentially 64 bits values where some | |
625 | * userland apps only expect 32 (like X itself since it thinks only | |
626 | * Sparc has 64 bits MMIO) but if we don't do that, we break it on | |
627 | * 32 bits CHRPs :-( | |
628 | * | |
629 | * Hopefully, the sysfs insterface is immune to that gunk. Once X | |
630 | * has been fixed (and the fix spread enough), we can re-enable the | |
631 | * 2 lines below and pass down a BAR value to userland. In that case | |
632 | * we'll also have to re-enable the matching code in | |
633 | * __pci_mmap_make_offset(). | |
634 | * | |
635 | * BenH. | |
636 | */ | |
637 | #if 0 | |
638 | else if (rsrc->flags & IORESOURCE_MEM) | |
639 | offset = hose->pci_mem_offset; | |
640 | #endif | |
641 | ||
642 | *start = rsrc->start - offset; | |
643 | *end = rsrc->end - offset; | |
644 | } | |
13dccb9e BH |
645 | |
646 | /** | |
647 | * pci_process_bridge_OF_ranges - Parse PCI bridge resources from device tree | |
648 | * @hose: newly allocated pci_controller to be setup | |
649 | * @dev: device node of the host bridge | |
650 | * @primary: set if primary bus (32 bits only, soon to be deprecated) | |
651 | * | |
652 | * This function will parse the "ranges" property of a PCI host bridge device | |
653 | * node and setup the resource mapping of a pci controller based on its | |
654 | * content. | |
655 | * | |
656 | * Life would be boring if it wasn't for a few issues that we have to deal | |
657 | * with here: | |
658 | * | |
659 | * - We can only cope with one IO space range and up to 3 Memory space | |
660 | * ranges. However, some machines (thanks Apple !) tend to split their | |
661 | * space into lots of small contiguous ranges. So we have to coalesce. | |
662 | * | |
13dccb9e BH |
663 | * - Some busses have IO space not starting at 0, which causes trouble with |
664 | * the way we do our IO resource renumbering. The code somewhat deals with | |
665 | * it for 64 bits but I would expect problems on 32 bits. | |
666 | * | |
667 | * - Some 32 bits platforms such as 4xx can have physical space larger than | |
668 | * 32 bits so we need to use 64 bits values for the parsing | |
669 | */ | |
cad5cef6 GKH |
670 | void pci_process_bridge_OF_ranges(struct pci_controller *hose, |
671 | struct device_node *dev, int primary) | |
13dccb9e | 672 | { |
858957ab | 673 | int memno = 0; |
13dccb9e | 674 | struct resource *res; |
654837e8 AM |
675 | struct of_pci_range range; |
676 | struct of_pci_range_parser parser; | |
13dccb9e BH |
677 | |
678 | printk(KERN_INFO "PCI host bridge %s %s ranges:\n", | |
679 | dev->full_name, primary ? "(primary)" : ""); | |
680 | ||
654837e8 AM |
681 | /* Check for ranges property */ |
682 | if (of_pci_range_parser_init(&parser, dev)) | |
13dccb9e BH |
683 | return; |
684 | ||
685 | /* Parse it */ | |
654837e8 | 686 | for_each_of_pci_range(&parser, &range) { |
e9f82cb7 BH |
687 | /* If we failed translation or got a zero-sized region |
688 | * (some FW try to feed us with non sensical zero sized regions | |
689 | * such as power3 which look like some kind of attempt at exposing | |
690 | * the VGA memory hole) | |
691 | */ | |
654837e8 | 692 | if (range.cpu_addr == OF_BAD_ADDR || range.size == 0) |
13dccb9e BH |
693 | continue; |
694 | ||
13dccb9e BH |
695 | /* Act based on address space type */ |
696 | res = NULL; | |
654837e8 AM |
697 | switch (range.flags & IORESOURCE_TYPE_BITS) { |
698 | case IORESOURCE_IO: | |
13dccb9e BH |
699 | printk(KERN_INFO |
700 | " IO 0x%016llx..0x%016llx -> 0x%016llx\n", | |
654837e8 AM |
701 | range.cpu_addr, range.cpu_addr + range.size - 1, |
702 | range.pci_addr); | |
13dccb9e BH |
703 | |
704 | /* We support only one IO range */ | |
705 | if (hose->pci_io_size) { | |
706 | printk(KERN_INFO | |
707 | " \\--> Skipped (too many) !\n"); | |
708 | continue; | |
709 | } | |
710 | #ifdef CONFIG_PPC32 | |
711 | /* On 32 bits, limit I/O space to 16MB */ | |
654837e8 AM |
712 | if (range.size > 0x01000000) |
713 | range.size = 0x01000000; | |
13dccb9e BH |
714 | |
715 | /* 32 bits needs to map IOs here */ | |
654837e8 AM |
716 | hose->io_base_virt = ioremap(range.cpu_addr, |
717 | range.size); | |
13dccb9e BH |
718 | |
719 | /* Expect trouble if pci_addr is not 0 */ | |
720 | if (primary) | |
721 | isa_io_base = | |
722 | (unsigned long)hose->io_base_virt; | |
723 | #endif /* CONFIG_PPC32 */ | |
724 | /* pci_io_size and io_base_phys always represent IO | |
725 | * space starting at 0 so we factor in pci_addr | |
726 | */ | |
654837e8 AM |
727 | hose->pci_io_size = range.pci_addr + range.size; |
728 | hose->io_base_phys = range.cpu_addr - range.pci_addr; | |
13dccb9e BH |
729 | |
730 | /* Build resource */ | |
731 | res = &hose->io_resource; | |
654837e8 | 732 | range.cpu_addr = range.pci_addr; |
13dccb9e | 733 | break; |
654837e8 | 734 | case IORESOURCE_MEM: |
13dccb9e BH |
735 | printk(KERN_INFO |
736 | " MEM 0x%016llx..0x%016llx -> 0x%016llx %s\n", | |
654837e8 AM |
737 | range.cpu_addr, range.cpu_addr + range.size - 1, |
738 | range.pci_addr, | |
739 | (range.pci_space & 0x40000000) ? | |
740 | "Prefetch" : ""); | |
13dccb9e BH |
741 | |
742 | /* We support only 3 memory ranges */ | |
743 | if (memno >= 3) { | |
744 | printk(KERN_INFO | |
745 | " \\--> Skipped (too many) !\n"); | |
746 | continue; | |
747 | } | |
748 | /* Handles ISA memory hole space here */ | |
654837e8 | 749 | if (range.pci_addr == 0) { |
13dccb9e | 750 | if (primary || isa_mem_base == 0) |
654837e8 AM |
751 | isa_mem_base = range.cpu_addr; |
752 | hose->isa_mem_phys = range.cpu_addr; | |
753 | hose->isa_mem_size = range.size; | |
13dccb9e BH |
754 | } |
755 | ||
13dccb9e | 756 | /* Build resource */ |
654837e8 AM |
757 | hose->mem_offset[memno] = range.cpu_addr - |
758 | range.pci_addr; | |
13dccb9e | 759 | res = &hose->mem_resources[memno++]; |
13dccb9e BH |
760 | break; |
761 | } | |
762 | if (res != NULL) { | |
aeba3731 ME |
763 | res->name = dev->full_name; |
764 | res->flags = range.flags; | |
765 | res->start = range.cpu_addr; | |
766 | res->end = range.cpu_addr + range.size - 1; | |
767 | res->parent = res->child = res->sibling = NULL; | |
13dccb9e BH |
768 | } |
769 | } | |
13dccb9e | 770 | } |
fa462f2d BH |
771 | |
772 | /* Decide whether to display the domain number in /proc */ | |
773 | int pci_proc_domain(struct pci_bus *bus) | |
774 | { | |
775 | struct pci_controller *hose = pci_bus_to_host(bus); | |
1fd0f525 | 776 | |
0e47ff1c | 777 | if (!pci_has_flag(PCI_ENABLE_PROC_DOMAINS)) |
fa462f2d | 778 | return 0; |
0e47ff1c | 779 | if (pci_has_flag(PCI_COMPAT_DOMAIN_0)) |
fa462f2d BH |
780 | return hose->global_number != 0; |
781 | return 1; | |
fa462f2d BH |
782 | } |
783 | ||
d82fb31a KSS |
784 | int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) |
785 | { | |
786 | if (ppc_md.pcibios_root_bridge_prepare) | |
787 | return ppc_md.pcibios_root_bridge_prepare(bridge); | |
788 | ||
789 | return 0; | |
790 | } | |
791 | ||
bf5e2ba2 BH |
792 | /* This header fixup will do the resource fixup for all devices as they are |
793 | * probed, but not for bridge ranges | |
794 | */ | |
cad5cef6 | 795 | static void pcibios_fixup_resources(struct pci_dev *dev) |
bf5e2ba2 BH |
796 | { |
797 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
798 | int i; | |
799 | ||
800 | if (!hose) { | |
801 | printk(KERN_ERR "No host bridge for PCI dev %s !\n", | |
802 | pci_name(dev)); | |
803 | return; | |
804 | } | |
c3b80fb0 WY |
805 | |
806 | if (dev->is_virtfn) | |
807 | return; | |
808 | ||
bf5e2ba2 BH |
809 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { |
810 | struct resource *res = dev->resource + i; | |
c5df457f | 811 | struct pci_bus_region reg; |
bf5e2ba2 BH |
812 | if (!res->flags) |
813 | continue; | |
48c2ce97 BH |
814 | |
815 | /* If we're going to re-assign everything, we mark all resources | |
816 | * as unset (and 0-base them). In addition, we mark BARs starting | |
817 | * at 0 as unset as well, except if PCI_PROBE_ONLY is also set | |
818 | * since in that case, we don't want to re-assign anything | |
7f172890 | 819 | */ |
fc279850 | 820 | pcibios_resource_to_bus(dev->bus, ®, res); |
48c2ce97 | 821 | if (pci_has_flag(PCI_REASSIGN_ALL_RSRC) || |
c5df457f | 822 | (reg.start == 0 && !pci_has_flag(PCI_PROBE_ONLY))) { |
48c2ce97 BH |
823 | /* Only print message if not re-assigning */ |
824 | if (!pci_has_flag(PCI_REASSIGN_ALL_RSRC)) | |
825 | pr_debug("PCI:%s Resource %d %016llx-%016llx [%x] " | |
826 | "is unassigned\n", | |
827 | pci_name(dev), i, | |
828 | (unsigned long long)res->start, | |
829 | (unsigned long long)res->end, | |
830 | (unsigned int)res->flags); | |
bf5e2ba2 BH |
831 | res->end -= res->start; |
832 | res->start = 0; | |
833 | res->flags |= IORESOURCE_UNSET; | |
834 | continue; | |
835 | } | |
836 | ||
6c5705fe | 837 | pr_debug("PCI:%s Resource %d %016llx-%016llx [%x]\n", |
bf5e2ba2 BH |
838 | pci_name(dev), i, |
839 | (unsigned long long)res->start,\ | |
840 | (unsigned long long)res->end, | |
841 | (unsigned int)res->flags); | |
bf5e2ba2 BH |
842 | } |
843 | ||
844 | /* Call machine specific resource fixup */ | |
845 | if (ppc_md.pcibios_fixup_resources) | |
846 | ppc_md.pcibios_fixup_resources(dev); | |
847 | } | |
848 | DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_fixup_resources); | |
849 | ||
b5561511 BH |
850 | /* This function tries to figure out if a bridge resource has been initialized |
851 | * by the firmware or not. It doesn't have to be absolutely bullet proof, but | |
852 | * things go more smoothly when it gets it right. It should covers cases such | |
853 | * as Apple "closed" bridge resources and bare-metal pSeries unassigned bridges | |
854 | */ | |
cad5cef6 GKH |
855 | static int pcibios_uninitialized_bridge_resource(struct pci_bus *bus, |
856 | struct resource *res) | |
bf5e2ba2 | 857 | { |
be8cbcd8 | 858 | struct pci_controller *hose = pci_bus_to_host(bus); |
bf5e2ba2 | 859 | struct pci_dev *dev = bus->self; |
b5561511 | 860 | resource_size_t offset; |
3fd47f06 | 861 | struct pci_bus_region region; |
b5561511 BH |
862 | u16 command; |
863 | int i; | |
bf5e2ba2 | 864 | |
b5561511 | 865 | /* We don't do anything if PCI_PROBE_ONLY is set */ |
0e47ff1c | 866 | if (pci_has_flag(PCI_PROBE_ONLY)) |
b5561511 | 867 | return 0; |
bf5e2ba2 | 868 | |
b5561511 BH |
869 | /* Job is a bit different between memory and IO */ |
870 | if (res->flags & IORESOURCE_MEM) { | |
fc279850 | 871 | pcibios_resource_to_bus(dev->bus, ®ion, res); |
3fd47f06 BH |
872 | |
873 | /* If the BAR is non-0 then it's probably been initialized */ | |
874 | if (region.start != 0) | |
b5561511 | 875 | return 0; |
bf5e2ba2 | 876 | |
b5561511 BH |
877 | /* The BAR is 0, let's check if memory decoding is enabled on |
878 | * the bridge. If not, we consider it unassigned | |
879 | */ | |
880 | pci_read_config_word(dev, PCI_COMMAND, &command); | |
881 | if ((command & PCI_COMMAND_MEMORY) == 0) | |
882 | return 1; | |
be8cbcd8 | 883 | |
b5561511 BH |
884 | /* Memory decoding is enabled and the BAR is 0. If any of the bridge |
885 | * resources covers that starting address (0 then it's good enough for | |
3fd47f06 | 886 | * us for memory space) |
b5561511 BH |
887 | */ |
888 | for (i = 0; i < 3; i++) { | |
889 | if ((hose->mem_resources[i].flags & IORESOURCE_MEM) && | |
3fd47f06 | 890 | hose->mem_resources[i].start == hose->mem_offset[i]) |
b5561511 BH |
891 | return 0; |
892 | } | |
893 | ||
894 | /* Well, it starts at 0 and we know it will collide so we may as | |
895 | * well consider it as unassigned. That covers the Apple case. | |
896 | */ | |
897 | return 1; | |
898 | } else { | |
899 | /* If the BAR is non-0, then we consider it assigned */ | |
900 | offset = (unsigned long)hose->io_base_virt - _IO_BASE; | |
901 | if (((res->start - offset) & 0xfffffffful) != 0) | |
902 | return 0; | |
903 | ||
904 | /* Here, we are a bit different than memory as typically IO space | |
905 | * starting at low addresses -is- valid. What we do instead if that | |
906 | * we consider as unassigned anything that doesn't have IO enabled | |
907 | * in the PCI command register, and that's it. | |
908 | */ | |
909 | pci_read_config_word(dev, PCI_COMMAND, &command); | |
910 | if (command & PCI_COMMAND_IO) | |
911 | return 0; | |
912 | ||
913 | /* It's starting at 0 and IO is disabled in the bridge, consider | |
914 | * it unassigned | |
915 | */ | |
916 | return 1; | |
917 | } | |
918 | } | |
919 | ||
920 | /* Fixup resources of a PCI<->PCI bridge */ | |
cad5cef6 | 921 | static void pcibios_fixup_bridge(struct pci_bus *bus) |
b5561511 BH |
922 | { |
923 | struct resource *res; | |
924 | int i; | |
925 | ||
926 | struct pci_dev *dev = bus->self; | |
927 | ||
89a74ecc BH |
928 | pci_bus_for_each_resource(bus, res, i) { |
929 | if (!res || !res->flags) | |
b5561511 BH |
930 | continue; |
931 | if (i >= 3 && bus->self->transparent) | |
932 | continue; | |
933 | ||
cf1a4cf8 GS |
934 | /* If we're going to reassign everything, we can |
935 | * shrink the P2P resource to have size as being | |
936 | * of 0 in order to save space. | |
48c2ce97 BH |
937 | */ |
938 | if (pci_has_flag(PCI_REASSIGN_ALL_RSRC)) { | |
939 | res->flags |= IORESOURCE_UNSET; | |
48c2ce97 | 940 | res->start = 0; |
cf1a4cf8 | 941 | res->end = -1; |
48c2ce97 BH |
942 | continue; |
943 | } | |
944 | ||
6c5705fe | 945 | pr_debug("PCI:%s Bus rsrc %d %016llx-%016llx [%x]\n", |
b5561511 BH |
946 | pci_name(dev), i, |
947 | (unsigned long long)res->start,\ | |
948 | (unsigned long long)res->end, | |
949 | (unsigned int)res->flags); | |
bf5e2ba2 | 950 | |
b5561511 BH |
951 | /* Try to detect uninitialized P2P bridge resources, |
952 | * and clear them out so they get re-assigned later | |
953 | */ | |
954 | if (pcibios_uninitialized_bridge_resource(bus, res)) { | |
955 | res->flags = 0; | |
956 | pr_debug("PCI:%s (unassigned)\n", pci_name(dev)); | |
bf5e2ba2 BH |
957 | } |
958 | } | |
b5561511 BH |
959 | } |
960 | ||
cad5cef6 | 961 | void pcibios_setup_bus_self(struct pci_bus *bus) |
8b8da358 | 962 | { |
467efc2e DA |
963 | struct pci_controller *phb; |
964 | ||
7eef440a | 965 | /* Fix up the bus resources for P2P bridges */ |
8b8da358 BH |
966 | if (bus->self != NULL) |
967 | pcibios_fixup_bridge(bus); | |
968 | ||
969 | /* Platform specific bus fixups. This is currently only used | |
7eef440a | 970 | * by fsl_pci and I'm hoping to get rid of it at some point |
8b8da358 BH |
971 | */ |
972 | if (ppc_md.pcibios_fixup_bus) | |
973 | ppc_md.pcibios_fixup_bus(bus); | |
974 | ||
975 | /* Setup bus DMA mappings */ | |
467efc2e DA |
976 | phb = pci_bus_to_host(bus); |
977 | if (phb->controller_ops.dma_bus_setup) | |
978 | phb->controller_ops.dma_bus_setup(bus); | |
8b8da358 BH |
979 | } |
980 | ||
7846de40 | 981 | static void pcibios_setup_device(struct pci_dev *dev) |
37f02195 | 982 | { |
467efc2e | 983 | struct pci_controller *phb; |
37f02195 YC |
984 | /* Fixup NUMA node as it may not be setup yet by the generic |
985 | * code and is needed by the DMA init | |
986 | */ | |
987 | set_dev_node(&dev->dev, pcibus_to_node(dev->bus)); | |
988 | ||
989 | /* Hook up default DMA ops */ | |
990 | set_dma_ops(&dev->dev, pci_dma_ops); | |
991 | set_dma_offset(&dev->dev, PCI_DRAM_OFFSET); | |
992 | ||
993 | /* Additional platform DMA/iommu setup */ | |
467efc2e DA |
994 | phb = pci_bus_to_host(dev->bus); |
995 | if (phb->controller_ops.dma_dev_setup) | |
996 | phb->controller_ops.dma_dev_setup(dev); | |
37f02195 YC |
997 | |
998 | /* Read default IRQs and fixup if necessary */ | |
999 | pci_read_irq_line(dev); | |
1000 | if (ppc_md.pci_irq_fixup) | |
1001 | ppc_md.pci_irq_fixup(dev); | |
1002 | } | |
1003 | ||
7846de40 GR |
1004 | int pcibios_add_device(struct pci_dev *dev) |
1005 | { | |
1006 | /* | |
1007 | * We can only call pcibios_setup_device() after bus setup is complete, | |
1008 | * since some of the platform specific DMA setup code depends on it. | |
1009 | */ | |
1010 | if (dev->bus->is_added) | |
1011 | pcibios_setup_device(dev); | |
6e628c7d WY |
1012 | |
1013 | #ifdef CONFIG_PCI_IOV | |
1014 | if (ppc_md.pcibios_fixup_sriov) | |
1015 | ppc_md.pcibios_fixup_sriov(dev); | |
1016 | #endif /* CONFIG_PCI_IOV */ | |
1017 | ||
7846de40 GR |
1018 | return 0; |
1019 | } | |
1020 | ||
cad5cef6 | 1021 | void pcibios_setup_bus_devices(struct pci_bus *bus) |
7eef440a BH |
1022 | { |
1023 | struct pci_dev *dev; | |
1024 | ||
1025 | pr_debug("PCI: Fixup bus devices %d (%s)\n", | |
1026 | bus->number, bus->self ? pci_name(bus->self) : "PHB"); | |
1027 | ||
1028 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
2d1c8618 BH |
1029 | /* Cardbus can call us to add new devices to a bus, so ignore |
1030 | * those who are already fully discovered | |
1031 | */ | |
1032 | if (dev->is_added) | |
1033 | continue; | |
1034 | ||
37f02195 | 1035 | pcibios_setup_device(dev); |
7eef440a BH |
1036 | } |
1037 | } | |
1038 | ||
79c8be83 MS |
1039 | void pcibios_set_master(struct pci_dev *dev) |
1040 | { | |
1041 | /* No special bus mastering setup handling */ | |
1042 | } | |
1043 | ||
cad5cef6 | 1044 | void pcibios_fixup_bus(struct pci_bus *bus) |
bf5e2ba2 BH |
1045 | { |
1046 | /* When called from the generic PCI probe, read PCI<->PCI bridge | |
7eef440a | 1047 | * bases. This is -not- called when generating the PCI tree from |
8b8da358 | 1048 | * the OF device-tree. |
bf5e2ba2 | 1049 | */ |
1a85d66b | 1050 | pci_read_bridge_bases(bus); |
bf5e2ba2 | 1051 | |
8b8da358 BH |
1052 | /* Now fixup the bus bus */ |
1053 | pcibios_setup_bus_self(bus); | |
1054 | ||
1055 | /* Now fixup devices on that bus */ | |
1056 | pcibios_setup_bus_devices(bus); | |
bf5e2ba2 | 1057 | } |
8b8da358 | 1058 | EXPORT_SYMBOL(pcibios_fixup_bus); |
3fd94c6b | 1059 | |
cad5cef6 | 1060 | void pci_fixup_cardbus(struct pci_bus *bus) |
2d1c8618 BH |
1061 | { |
1062 | /* Now fixup devices on that bus */ | |
1063 | pcibios_setup_bus_devices(bus); | |
1064 | } | |
1065 | ||
1066 | ||
3fd94c6b BH |
1067 | static int skip_isa_ioresource_align(struct pci_dev *dev) |
1068 | { | |
0e47ff1c | 1069 | if (pci_has_flag(PCI_CAN_SKIP_ISA_ALIGN) && |
3fd94c6b BH |
1070 | !(dev->bus->bridge_ctl & PCI_BRIDGE_CTL_ISA)) |
1071 | return 1; | |
1072 | return 0; | |
1073 | } | |
1074 | ||
1075 | /* | |
1076 | * We need to avoid collisions with `mirrored' VGA ports | |
1077 | * and other strange ISA hardware, so we always want the | |
1078 | * addresses to be allocated in the 0x000-0x0ff region | |
1079 | * modulo 0x400. | |
1080 | * | |
1081 | * Why? Because some silly external IO cards only decode | |
1082 | * the low 10 bits of the IO address. The 0x00-0xff region | |
1083 | * is reserved for motherboard devices that decode all 16 | |
1084 | * bits, so it's ok to allocate at, say, 0x2800-0x28ff, | |
1085 | * but we want to try to avoid allocating at 0x2900-0x2bff | |
1086 | * which might have be mirrored at 0x0100-0x03ff.. | |
1087 | */ | |
3b7a17fc | 1088 | resource_size_t pcibios_align_resource(void *data, const struct resource *res, |
3fd94c6b BH |
1089 | resource_size_t size, resource_size_t align) |
1090 | { | |
1091 | struct pci_dev *dev = data; | |
b26b2d49 | 1092 | resource_size_t start = res->start; |
3fd94c6b BH |
1093 | |
1094 | if (res->flags & IORESOURCE_IO) { | |
3fd94c6b | 1095 | if (skip_isa_ioresource_align(dev)) |
b26b2d49 DB |
1096 | return start; |
1097 | if (start & 0x300) | |
3fd94c6b | 1098 | start = (start + 0x3ff) & ~0x3ff; |
3fd94c6b | 1099 | } |
b26b2d49 DB |
1100 | |
1101 | return start; | |
3fd94c6b BH |
1102 | } |
1103 | EXPORT_SYMBOL(pcibios_align_resource); | |
1104 | ||
1105 | /* | |
1106 | * Reparent resource children of pr that conflict with res | |
1107 | * under res, and make res replace those children. | |
1108 | */ | |
0f6023d5 | 1109 | static int reparent_resources(struct resource *parent, |
3fd94c6b BH |
1110 | struct resource *res) |
1111 | { | |
1112 | struct resource *p, **pp; | |
1113 | struct resource **firstpp = NULL; | |
1114 | ||
1115 | for (pp = &parent->child; (p = *pp) != NULL; pp = &p->sibling) { | |
1116 | if (p->end < res->start) | |
1117 | continue; | |
1118 | if (res->end < p->start) | |
1119 | break; | |
1120 | if (p->start < res->start || p->end > res->end) | |
1121 | return -1; /* not completely contained */ | |
1122 | if (firstpp == NULL) | |
1123 | firstpp = pp; | |
1124 | } | |
1125 | if (firstpp == NULL) | |
1126 | return -1; /* didn't find any conflicting entries? */ | |
1127 | res->parent = parent; | |
1128 | res->child = *firstpp; | |
1129 | res->sibling = *pp; | |
1130 | *firstpp = res; | |
1131 | *pp = NULL; | |
1132 | for (p = res->child; p != NULL; p = p->sibling) { | |
1133 | p->parent = res; | |
b0494bc8 BH |
1134 | pr_debug("PCI: Reparented %s [%llx..%llx] under %s\n", |
1135 | p->name, | |
1136 | (unsigned long long)p->start, | |
1137 | (unsigned long long)p->end, res->name); | |
3fd94c6b BH |
1138 | } |
1139 | return 0; | |
1140 | } | |
1141 | ||
1142 | /* | |
1143 | * Handle resources of PCI devices. If the world were perfect, we could | |
1144 | * just allocate all the resource regions and do nothing more. It isn't. | |
1145 | * On the other hand, we cannot just re-allocate all devices, as it would | |
1146 | * require us to know lots of host bridge internals. So we attempt to | |
1147 | * keep as much of the original configuration as possible, but tweak it | |
1148 | * when it's found to be wrong. | |
1149 | * | |
1150 | * Known BIOS problems we have to work around: | |
1151 | * - I/O or memory regions not configured | |
1152 | * - regions configured, but not enabled in the command register | |
1153 | * - bogus I/O addresses above 64K used | |
1154 | * - expansion ROMs left enabled (this may sound harmless, but given | |
1155 | * the fact the PCI specs explicitly allow address decoders to be | |
1156 | * shared between expansion ROMs and other resource regions, it's | |
1157 | * at least dangerous) | |
1158 | * | |
1159 | * Our solution: | |
1160 | * (1) Allocate resources for all buses behind PCI-to-PCI bridges. | |
1161 | * This gives us fixed barriers on where we can allocate. | |
1162 | * (2) Allocate resources for all enabled devices. If there is | |
1163 | * a collision, just mark the resource as unallocated. Also | |
1164 | * disable expansion ROMs during this step. | |
1165 | * (3) Try to allocate resources for disabled devices. If the | |
1166 | * resources were assigned correctly, everything goes well, | |
1167 | * if they weren't, they won't disturb allocation of other | |
1168 | * resources. | |
1169 | * (4) Assign new addresses to resources which were either | |
1170 | * not configured at all or misconfigured. If explicitly | |
1171 | * requested by the user, configure expansion ROM address | |
1172 | * as well. | |
1173 | */ | |
1174 | ||
e51df2c1 | 1175 | static void pcibios_allocate_bus_resources(struct pci_bus *bus) |
3fd94c6b | 1176 | { |
e90a1318 | 1177 | struct pci_bus *b; |
3fd94c6b BH |
1178 | int i; |
1179 | struct resource *res, *pr; | |
1180 | ||
b5ae5f91 BH |
1181 | pr_debug("PCI: Allocating bus resources for %04x:%02x...\n", |
1182 | pci_domain_nr(bus), bus->number); | |
1183 | ||
89a74ecc BH |
1184 | pci_bus_for_each_resource(bus, res, i) { |
1185 | if (!res || !res->flags || res->start > res->end || res->parent) | |
e90a1318 | 1186 | continue; |
48c2ce97 BH |
1187 | |
1188 | /* If the resource was left unset at this point, we clear it */ | |
1189 | if (res->flags & IORESOURCE_UNSET) | |
1190 | goto clear_resource; | |
1191 | ||
e90a1318 NF |
1192 | if (bus->parent == NULL) |
1193 | pr = (res->flags & IORESOURCE_IO) ? | |
1194 | &ioport_resource : &iomem_resource; | |
1195 | else { | |
e90a1318 NF |
1196 | pr = pci_find_parent_resource(bus->self, res); |
1197 | if (pr == res) { | |
1198 | /* this happens when the generic PCI | |
1199 | * code (wrongly) decides that this | |
1200 | * bridge is transparent -- paulus | |
3fd94c6b | 1201 | */ |
e90a1318 | 1202 | continue; |
3fd94c6b | 1203 | } |
e90a1318 | 1204 | } |
3fd94c6b | 1205 | |
b0494bc8 BH |
1206 | pr_debug("PCI: %s (bus %d) bridge rsrc %d: %016llx-%016llx " |
1207 | "[0x%x], parent %p (%s)\n", | |
1208 | bus->self ? pci_name(bus->self) : "PHB", | |
1209 | bus->number, i, | |
1210 | (unsigned long long)res->start, | |
1211 | (unsigned long long)res->end, | |
1212 | (unsigned int)res->flags, | |
1213 | pr, (pr && pr->name) ? pr->name : "nil"); | |
e90a1318 NF |
1214 | |
1215 | if (pr && !(pr->flags & IORESOURCE_UNSET)) { | |
3ebfe46a YL |
1216 | struct pci_dev *dev = bus->self; |
1217 | ||
e90a1318 NF |
1218 | if (request_resource(pr, res) == 0) |
1219 | continue; | |
1220 | /* | |
1221 | * Must be a conflict with an existing entry. | |
1222 | * Move that entry (or entries) under the | |
1223 | * bridge resource and try again. | |
1224 | */ | |
1225 | if (reparent_resources(pr, res) == 0) | |
1226 | continue; | |
3ebfe46a YL |
1227 | |
1228 | if (dev && i < PCI_BRIDGE_RESOURCE_NUM && | |
1229 | pci_claim_bridge_resource(dev, | |
1230 | i + PCI_BRIDGE_RESOURCES) == 0) | |
1231 | continue; | |
3fd94c6b | 1232 | } |
48c2ce97 BH |
1233 | pr_warning("PCI: Cannot allocate resource region " |
1234 | "%d of PCI bridge %d, will remap\n", i, bus->number); | |
1235 | clear_resource: | |
cf1a4cf8 GS |
1236 | /* The resource might be figured out when doing |
1237 | * reassignment based on the resources required | |
1238 | * by the downstream PCI devices. Here we set | |
1239 | * the size of the resource to be 0 in order to | |
1240 | * save more space. | |
1241 | */ | |
1242 | res->start = 0; | |
1243 | res->end = -1; | |
e90a1318 | 1244 | res->flags = 0; |
3fd94c6b | 1245 | } |
e90a1318 NF |
1246 | |
1247 | list_for_each_entry(b, &bus->children, node) | |
1248 | pcibios_allocate_bus_resources(b); | |
3fd94c6b BH |
1249 | } |
1250 | ||
cad5cef6 | 1251 | static inline void alloc_resource(struct pci_dev *dev, int idx) |
3fd94c6b BH |
1252 | { |
1253 | struct resource *pr, *r = &dev->resource[idx]; | |
1254 | ||
b0494bc8 BH |
1255 | pr_debug("PCI: Allocating %s: Resource %d: %016llx..%016llx [%x]\n", |
1256 | pci_name(dev), idx, | |
1257 | (unsigned long long)r->start, | |
1258 | (unsigned long long)r->end, | |
1259 | (unsigned int)r->flags); | |
3fd94c6b BH |
1260 | |
1261 | pr = pci_find_parent_resource(dev, r); | |
1262 | if (!pr || (pr->flags & IORESOURCE_UNSET) || | |
1263 | request_resource(pr, r) < 0) { | |
1264 | printk(KERN_WARNING "PCI: Cannot allocate resource region %d" | |
1265 | " of device %s, will remap\n", idx, pci_name(dev)); | |
1266 | if (pr) | |
b0494bc8 BH |
1267 | pr_debug("PCI: parent is %p: %016llx-%016llx [%x]\n", |
1268 | pr, | |
1269 | (unsigned long long)pr->start, | |
1270 | (unsigned long long)pr->end, | |
1271 | (unsigned int)pr->flags); | |
3fd94c6b BH |
1272 | /* We'll assign a new address later */ |
1273 | r->flags |= IORESOURCE_UNSET; | |
1274 | r->end -= r->start; | |
1275 | r->start = 0; | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | static void __init pcibios_allocate_resources(int pass) | |
1280 | { | |
1281 | struct pci_dev *dev = NULL; | |
1282 | int idx, disabled; | |
1283 | u16 command; | |
1284 | struct resource *r; | |
1285 | ||
1286 | for_each_pci_dev(dev) { | |
1287 | pci_read_config_word(dev, PCI_COMMAND, &command); | |
ad892a63 | 1288 | for (idx = 0; idx <= PCI_ROM_RESOURCE; idx++) { |
3fd94c6b BH |
1289 | r = &dev->resource[idx]; |
1290 | if (r->parent) /* Already allocated */ | |
1291 | continue; | |
1292 | if (!r->flags || (r->flags & IORESOURCE_UNSET)) | |
1293 | continue; /* Not assigned at all */ | |
ad892a63 BH |
1294 | /* We only allocate ROMs on pass 1 just in case they |
1295 | * have been screwed up by firmware | |
1296 | */ | |
1297 | if (idx == PCI_ROM_RESOURCE ) | |
1298 | disabled = 1; | |
3fd94c6b BH |
1299 | if (r->flags & IORESOURCE_IO) |
1300 | disabled = !(command & PCI_COMMAND_IO); | |
1301 | else | |
1302 | disabled = !(command & PCI_COMMAND_MEMORY); | |
533b1928 PM |
1303 | if (pass == disabled) |
1304 | alloc_resource(dev, idx); | |
3fd94c6b BH |
1305 | } |
1306 | if (pass) | |
1307 | continue; | |
1308 | r = &dev->resource[PCI_ROM_RESOURCE]; | |
ad892a63 | 1309 | if (r->flags) { |
3fd94c6b BH |
1310 | /* Turn the ROM off, leave the resource region, |
1311 | * but keep it unregistered. | |
1312 | */ | |
1313 | u32 reg; | |
3fd94c6b | 1314 | pci_read_config_dword(dev, dev->rom_base_reg, ®); |
ad892a63 BH |
1315 | if (reg & PCI_ROM_ADDRESS_ENABLE) { |
1316 | pr_debug("PCI: Switching off ROM of %s\n", | |
1317 | pci_name(dev)); | |
1318 | r->flags &= ~IORESOURCE_ROM_ENABLE; | |
1319 | pci_write_config_dword(dev, dev->rom_base_reg, | |
1320 | reg & ~PCI_ROM_ADDRESS_ENABLE); | |
1321 | } | |
3fd94c6b BH |
1322 | } |
1323 | } | |
1324 | } | |
1325 | ||
c1f34302 BH |
1326 | static void __init pcibios_reserve_legacy_regions(struct pci_bus *bus) |
1327 | { | |
1328 | struct pci_controller *hose = pci_bus_to_host(bus); | |
1329 | resource_size_t offset; | |
1330 | struct resource *res, *pres; | |
1331 | int i; | |
1332 | ||
1333 | pr_debug("Reserving legacy ranges for domain %04x\n", pci_domain_nr(bus)); | |
1334 | ||
1335 | /* Check for IO */ | |
1336 | if (!(hose->io_resource.flags & IORESOURCE_IO)) | |
1337 | goto no_io; | |
1338 | offset = (unsigned long)hose->io_base_virt - _IO_BASE; | |
1339 | res = kzalloc(sizeof(struct resource), GFP_KERNEL); | |
1340 | BUG_ON(res == NULL); | |
1341 | res->name = "Legacy IO"; | |
1342 | res->flags = IORESOURCE_IO; | |
1343 | res->start = offset; | |
1344 | res->end = (offset + 0xfff) & 0xfffffffful; | |
1345 | pr_debug("Candidate legacy IO: %pR\n", res); | |
1346 | if (request_resource(&hose->io_resource, res)) { | |
1347 | printk(KERN_DEBUG | |
1348 | "PCI %04x:%02x Cannot reserve Legacy IO %pR\n", | |
1349 | pci_domain_nr(bus), bus->number, res); | |
1350 | kfree(res); | |
1351 | } | |
1352 | ||
1353 | no_io: | |
1354 | /* Check for memory */ | |
c1f34302 BH |
1355 | for (i = 0; i < 3; i++) { |
1356 | pres = &hose->mem_resources[i]; | |
3fd47f06 | 1357 | offset = hose->mem_offset[i]; |
c1f34302 BH |
1358 | if (!(pres->flags & IORESOURCE_MEM)) |
1359 | continue; | |
1360 | pr_debug("hose mem res: %pR\n", pres); | |
1361 | if ((pres->start - offset) <= 0xa0000 && | |
1362 | (pres->end - offset) >= 0xbffff) | |
1363 | break; | |
1364 | } | |
1365 | if (i >= 3) | |
1366 | return; | |
1367 | res = kzalloc(sizeof(struct resource), GFP_KERNEL); | |
1368 | BUG_ON(res == NULL); | |
1369 | res->name = "Legacy VGA memory"; | |
1370 | res->flags = IORESOURCE_MEM; | |
1371 | res->start = 0xa0000 + offset; | |
1372 | res->end = 0xbffff + offset; | |
1373 | pr_debug("Candidate VGA memory: %pR\n", res); | |
1374 | if (request_resource(pres, res)) { | |
1375 | printk(KERN_DEBUG | |
1376 | "PCI %04x:%02x Cannot reserve VGA memory %pR\n", | |
1377 | pci_domain_nr(bus), bus->number, res); | |
1378 | kfree(res); | |
1379 | } | |
1380 | } | |
1381 | ||
3fd94c6b BH |
1382 | void __init pcibios_resource_survey(void) |
1383 | { | |
e90a1318 NF |
1384 | struct pci_bus *b; |
1385 | ||
48c2ce97 | 1386 | /* Allocate and assign resources */ |
e90a1318 NF |
1387 | list_for_each_entry(b, &pci_root_buses, node) |
1388 | pcibios_allocate_bus_resources(b); | |
48c2ce97 BH |
1389 | pcibios_allocate_resources(0); |
1390 | pcibios_allocate_resources(1); | |
3fd94c6b | 1391 | |
c1f34302 BH |
1392 | /* Before we start assigning unassigned resource, we try to reserve |
1393 | * the low IO area and the VGA memory area if they intersect the | |
1394 | * bus available resources to avoid allocating things on top of them | |
1395 | */ | |
0e47ff1c | 1396 | if (!pci_has_flag(PCI_PROBE_ONLY)) { |
c1f34302 BH |
1397 | list_for_each_entry(b, &pci_root_buses, node) |
1398 | pcibios_reserve_legacy_regions(b); | |
1399 | } | |
1400 | ||
1401 | /* Now, if the platform didn't decide to blindly trust the firmware, | |
1402 | * we proceed to assigning things that were left unassigned | |
1403 | */ | |
0e47ff1c | 1404 | if (!pci_has_flag(PCI_PROBE_ONLY)) { |
a77acda0 | 1405 | pr_debug("PCI: Assigning unassigned resources...\n"); |
3fd94c6b BH |
1406 | pci_assign_unassigned_resources(); |
1407 | } | |
1408 | ||
1409 | /* Call machine dependent fixup */ | |
1410 | if (ppc_md.pcibios_fixup) | |
1411 | ppc_md.pcibios_fixup(); | |
1412 | } | |
1413 | ||
fd6852c8 | 1414 | /* This is used by the PCI hotplug driver to allocate resource |
3fd94c6b | 1415 | * of newly plugged busses. We can try to consolidate with the |
fd6852c8 BH |
1416 | * rest of the code later, for now, keep it as-is as our main |
1417 | * resource allocation function doesn't deal with sub-trees yet. | |
3fd94c6b | 1418 | */ |
baf75b0a | 1419 | void pcibios_claim_one_bus(struct pci_bus *bus) |
3fd94c6b BH |
1420 | { |
1421 | struct pci_dev *dev; | |
1422 | struct pci_bus *child_bus; | |
1423 | ||
1424 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
1425 | int i; | |
1426 | ||
1427 | for (i = 0; i < PCI_NUM_RESOURCES; i++) { | |
1428 | struct resource *r = &dev->resource[i]; | |
1429 | ||
1430 | if (r->parent || !r->start || !r->flags) | |
1431 | continue; | |
fd6852c8 BH |
1432 | |
1433 | pr_debug("PCI: Claiming %s: " | |
1434 | "Resource %d: %016llx..%016llx [%x]\n", | |
1435 | pci_name(dev), i, | |
1436 | (unsigned long long)r->start, | |
1437 | (unsigned long long)r->end, | |
1438 | (unsigned int)r->flags); | |
1439 | ||
3ebfe46a YL |
1440 | if (pci_claim_resource(dev, i) == 0) |
1441 | continue; | |
1442 | ||
1443 | pci_claim_bridge_resource(dev, i); | |
3fd94c6b BH |
1444 | } |
1445 | } | |
1446 | ||
1447 | list_for_each_entry(child_bus, &bus->children, node) | |
1448 | pcibios_claim_one_bus(child_bus); | |
1449 | } | |
fd6852c8 BH |
1450 | |
1451 | ||
1452 | /* pcibios_finish_adding_to_bus | |
1453 | * | |
1454 | * This is to be called by the hotplug code after devices have been | |
1455 | * added to a bus, this include calling it for a PHB that is just | |
1456 | * being added | |
1457 | */ | |
1458 | void pcibios_finish_adding_to_bus(struct pci_bus *bus) | |
1459 | { | |
1460 | pr_debug("PCI: Finishing adding to hotplug bus %04x:%02x\n", | |
1461 | pci_domain_nr(bus), bus->number); | |
1462 | ||
1463 | /* Allocate bus and devices resources */ | |
1464 | pcibios_allocate_bus_resources(bus); | |
1465 | pcibios_claim_one_bus(bus); | |
ab444ec9 GS |
1466 | if (!pci_has_flag(PCI_PROBE_ONLY)) |
1467 | pci_assign_unassigned_bus_resources(bus); | |
fd6852c8 | 1468 | |
6a040ce7 TLSC |
1469 | /* Fixup EEH */ |
1470 | eeh_add_device_tree_late(bus); | |
1471 | ||
fd6852c8 BH |
1472 | /* Add new devices to global lists. Register in proc, sysfs. */ |
1473 | pci_bus_add_devices(bus); | |
1474 | ||
6a040ce7 TLSC |
1475 | /* sysfs files should only be added after devices are added */ |
1476 | eeh_add_sysfs_files(bus); | |
fd6852c8 BH |
1477 | } |
1478 | EXPORT_SYMBOL_GPL(pcibios_finish_adding_to_bus); | |
1479 | ||
549beb9b BH |
1480 | int pcibios_enable_device(struct pci_dev *dev, int mask) |
1481 | { | |
467efc2e DA |
1482 | struct pci_controller *phb = pci_bus_to_host(dev->bus); |
1483 | ||
1484 | if (phb->controller_ops.enable_device_hook) | |
1485 | if (!phb->controller_ops.enable_device_hook(dev)) | |
1486 | return -EINVAL; | |
549beb9b | 1487 | |
7cfb5f9a | 1488 | return pci_enable_resources(dev, mask); |
549beb9b | 1489 | } |
53280323 | 1490 | |
38973ba7 BH |
1491 | resource_size_t pcibios_io_space_offset(struct pci_controller *hose) |
1492 | { | |
1493 | return (unsigned long) hose->io_base_virt - _IO_BASE; | |
1494 | } | |
1495 | ||
cad5cef6 GKH |
1496 | static void pcibios_setup_phb_resources(struct pci_controller *hose, |
1497 | struct list_head *resources) | |
53280323 | 1498 | { |
53280323 | 1499 | struct resource *res; |
3fd47f06 | 1500 | resource_size_t offset; |
53280323 BH |
1501 | int i; |
1502 | ||
1503 | /* Hookup PHB IO resource */ | |
45a709f8 | 1504 | res = &hose->io_resource; |
53280323 BH |
1505 | |
1506 | if (!res->flags) { | |
adb7cd73 | 1507 | pr_info("PCI: I/O resource not set for host" |
53280323 BH |
1508 | " bridge %s (domain %d)\n", |
1509 | hose->dn->full_name, hose->global_number); | |
3fd47f06 BH |
1510 | } else { |
1511 | offset = pcibios_io_space_offset(hose); | |
1512 | ||
1513 | pr_debug("PCI: PHB IO resource = %08llx-%08llx [%lx] off 0x%08llx\n", | |
a0b8e76f BH |
1514 | (unsigned long long)res->start, |
1515 | (unsigned long long)res->end, | |
3fd47f06 BH |
1516 | (unsigned long)res->flags, |
1517 | (unsigned long long)offset); | |
1518 | pci_add_resource_offset(resources, res, offset); | |
a0b8e76f | 1519 | } |
53280323 BH |
1520 | |
1521 | /* Hookup PHB Memory resources */ | |
1522 | for (i = 0; i < 3; ++i) { | |
1523 | res = &hose->mem_resources[i]; | |
1524 | if (!res->flags) { | |
bee7dd9c BH |
1525 | if (i == 0) |
1526 | printk(KERN_ERR "PCI: Memory resource 0 not set for " | |
1527 | "host bridge %s (domain %d)\n", | |
1528 | hose->dn->full_name, hose->global_number); | |
3fd47f06 | 1529 | continue; |
a0b8e76f | 1530 | } |
3fd47f06 | 1531 | offset = hose->mem_offset[i]; |
53280323 | 1532 | |
3fd47f06 BH |
1533 | |
1534 | pr_debug("PCI: PHB MEM resource %d = %08llx-%08llx [%lx] off 0x%08llx\n", i, | |
1535 | (unsigned long long)res->start, | |
1536 | (unsigned long long)res->end, | |
1537 | (unsigned long)res->flags, | |
1538 | (unsigned long long)offset); | |
1539 | ||
1540 | pci_add_resource_offset(resources, res, offset); | |
1541 | } | |
53280323 | 1542 | } |
89c2dd62 KG |
1543 | |
1544 | /* | |
1545 | * Null PCI config access functions, for the case when we can't | |
1546 | * find a hose. | |
1547 | */ | |
1548 | #define NULL_PCI_OP(rw, size, type) \ | |
1549 | static int \ | |
1550 | null_##rw##_config_##size(struct pci_dev *dev, int offset, type val) \ | |
1551 | { \ | |
1552 | return PCIBIOS_DEVICE_NOT_FOUND; \ | |
1553 | } | |
1554 | ||
1555 | static int | |
1556 | null_read_config(struct pci_bus *bus, unsigned int devfn, int offset, | |
1557 | int len, u32 *val) | |
1558 | { | |
1559 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1560 | } | |
1561 | ||
1562 | static int | |
1563 | null_write_config(struct pci_bus *bus, unsigned int devfn, int offset, | |
1564 | int len, u32 val) | |
1565 | { | |
1566 | return PCIBIOS_DEVICE_NOT_FOUND; | |
1567 | } | |
1568 | ||
1569 | static struct pci_ops null_pci_ops = | |
1570 | { | |
1571 | .read = null_read_config, | |
1572 | .write = null_write_config, | |
1573 | }; | |
1574 | ||
1575 | /* | |
1576 | * These functions are used early on before PCI scanning is done | |
1577 | * and all of the pci_dev and pci_bus structures have been created. | |
1578 | */ | |
1579 | static struct pci_bus * | |
1580 | fake_pci_bus(struct pci_controller *hose, int busnr) | |
1581 | { | |
1582 | static struct pci_bus bus; | |
1583 | ||
b0d436c7 | 1584 | if (hose == NULL) { |
89c2dd62 KG |
1585 | printk(KERN_ERR "Can't find hose for PCI bus %d!\n", busnr); |
1586 | } | |
1587 | bus.number = busnr; | |
1588 | bus.sysdata = hose; | |
1589 | bus.ops = hose? hose->ops: &null_pci_ops; | |
1590 | return &bus; | |
1591 | } | |
1592 | ||
1593 | #define EARLY_PCI_OP(rw, size, type) \ | |
1594 | int early_##rw##_config_##size(struct pci_controller *hose, int bus, \ | |
1595 | int devfn, int offset, type value) \ | |
1596 | { \ | |
1597 | return pci_bus_##rw##_config_##size(fake_pci_bus(hose, bus), \ | |
1598 | devfn, offset, value); \ | |
1599 | } | |
1600 | ||
1601 | EARLY_PCI_OP(read, byte, u8 *) | |
1602 | EARLY_PCI_OP(read, word, u16 *) | |
1603 | EARLY_PCI_OP(read, dword, u32 *) | |
1604 | EARLY_PCI_OP(write, byte, u8) | |
1605 | EARLY_PCI_OP(write, word, u16) | |
1606 | EARLY_PCI_OP(write, dword, u32) | |
1607 | ||
89c2dd62 KG |
1608 | int early_find_capability(struct pci_controller *hose, int bus, int devfn, |
1609 | int cap) | |
1610 | { | |
1611 | return pci_bus_find_capability(fake_pci_bus(hose, bus), devfn, cap); | |
1612 | } | |
0ed2c722 | 1613 | |
98d9f30c BH |
1614 | struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus) |
1615 | { | |
1616 | struct pci_controller *hose = bus->sysdata; | |
1617 | ||
1618 | return of_node_get(hose->dn); | |
1619 | } | |
1620 | ||
0ed2c722 GL |
1621 | /** |
1622 | * pci_scan_phb - Given a pci_controller, setup and scan the PCI bus | |
1623 | * @hose: Pointer to the PCI host controller instance structure | |
0ed2c722 | 1624 | */ |
cad5cef6 | 1625 | void pcibios_scan_phb(struct pci_controller *hose) |
0ed2c722 | 1626 | { |
45a709f8 | 1627 | LIST_HEAD(resources); |
0ed2c722 GL |
1628 | struct pci_bus *bus; |
1629 | struct device_node *node = hose->dn; | |
1630 | int mode; | |
1631 | ||
74a7f084 | 1632 | pr_debug("PCI: Scanning PHB %s\n", of_node_full_name(node)); |
0ed2c722 | 1633 | |
45a709f8 BH |
1634 | /* Get some IO space for the new PHB */ |
1635 | pcibios_setup_phb_io_space(hose); | |
1636 | ||
1637 | /* Wire up PHB bus resources */ | |
1638 | pcibios_setup_phb_resources(hose, &resources); | |
1639 | ||
be8e60d8 YL |
1640 | hose->busn.start = hose->first_busno; |
1641 | hose->busn.end = hose->last_busno; | |
1642 | hose->busn.flags = IORESOURCE_BUS; | |
1643 | pci_add_resource(&resources, &hose->busn); | |
1644 | ||
0ed2c722 | 1645 | /* Create an empty bus for the toplevel */ |
45a709f8 BH |
1646 | bus = pci_create_root_bus(hose->parent, hose->first_busno, |
1647 | hose->ops, hose, &resources); | |
0ed2c722 GL |
1648 | if (bus == NULL) { |
1649 | pr_err("Failed to create bus for PCI domain %04x\n", | |
1650 | hose->global_number); | |
45a709f8 | 1651 | pci_free_resource_list(&resources); |
0ed2c722 GL |
1652 | return; |
1653 | } | |
0ed2c722 GL |
1654 | hose->bus = bus; |
1655 | ||
0ed2c722 GL |
1656 | /* Get probe mode and perform scan */ |
1657 | mode = PCI_PROBE_NORMAL; | |
467efc2e DA |
1658 | if (node && hose->controller_ops.probe_mode) |
1659 | mode = hose->controller_ops.probe_mode(bus); | |
0ed2c722 | 1660 | pr_debug(" probe mode: %d\n", mode); |
be8e60d8 | 1661 | if (mode == PCI_PROBE_DEVTREE) |
0ed2c722 | 1662 | of_scan_bus(node, bus); |
0ed2c722 | 1663 | |
be8e60d8 YL |
1664 | if (mode == PCI_PROBE_NORMAL) { |
1665 | pci_bus_update_busn_res_end(bus, 255); | |
1666 | hose->last_busno = pci_scan_child_bus(bus); | |
1667 | pci_bus_update_busn_res_end(bus, hose->last_busno); | |
1668 | } | |
781fb7a3 | 1669 | |
491b98c3 BH |
1670 | /* Platform gets a chance to do some global fixups before |
1671 | * we proceed to resource allocation | |
1672 | */ | |
1673 | if (ppc_md.pcibios_fixup_phb) | |
1674 | ppc_md.pcibios_fixup_phb(hose); | |
1675 | ||
781fb7a3 | 1676 | /* Configure PCI Express settings */ |
bb36c445 | 1677 | if (bus && !pci_has_flag(PCI_PROBE_ONLY)) { |
781fb7a3 | 1678 | struct pci_bus *child; |
a58674ff BH |
1679 | list_for_each_entry(child, &bus->children, node) |
1680 | pcie_bus_configure_settings(child); | |
781fb7a3 | 1681 | } |
0ed2c722 | 1682 | } |
c065488f KG |
1683 | |
1684 | static void fixup_hide_host_resource_fsl(struct pci_dev *dev) | |
1685 | { | |
1686 | int i, class = dev->class >> 8; | |
05737c7c JJ |
1687 | /* When configured as agent, programing interface = 1 */ |
1688 | int prog_if = dev->class & 0xf; | |
c065488f KG |
1689 | |
1690 | if ((class == PCI_CLASS_PROCESSOR_POWERPC || | |
1691 | class == PCI_CLASS_BRIDGE_OTHER) && | |
1692 | (dev->hdr_type == PCI_HEADER_TYPE_NORMAL) && | |
05737c7c | 1693 | (prog_if == 0) && |
c065488f KG |
1694 | (dev->bus->parent == NULL)) { |
1695 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { | |
1696 | dev->resource[i].start = 0; | |
1697 | dev->resource[i].end = 0; | |
1698 | dev->resource[i].flags = 0; | |
1699 | } | |
1700 | } | |
1701 | } | |
1702 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MOTOROLA, PCI_ANY_ID, fixup_hide_host_resource_fsl); | |
1703 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, fixup_hide_host_resource_fsl); | |
c2e1d845 BK |
1704 | |
1705 | static void fixup_vga(struct pci_dev *pdev) | |
1706 | { | |
1707 | u16 cmd; | |
1708 | ||
1709 | pci_read_config_word(pdev, PCI_COMMAND, &cmd); | |
1710 | if ((cmd & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) || !vga_default_device()) | |
1711 | vga_set_default_device(pdev); | |
1712 | ||
1713 | } | |
1714 | DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_ANY_ID, PCI_ANY_ID, | |
1715 | PCI_CLASS_DISPLAY_VGA, 8, fixup_vga); |