Blame view
drivers/pci/probe.c
84.1 KB
7328c8f48 PCI: Add SPDX GPL... |
1 |
// SPDX-License-Identifier: GPL-2.0 |
1da177e4c Linux-2.6.12-rc2 |
2 |
/* |
df62ab5e0 PCI: Tidy comments |
3 |
* PCI detection and setup code |
1da177e4c Linux-2.6.12-rc2 |
4 5 6 7 8 9 |
*/ #include <linux/kernel.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/pci.h> |
bbd8810d3 PCI: Remove unuse... |
10 |
#include <linux/msi.h> |
50230713b PCI: OF: Move of_... |
11 |
#include <linux/of_device.h> |
de335bb49 PCI: Update DMA c... |
12 |
#include <linux/of_pci.h> |
589fcc230 PCI: Move pci_con... |
13 |
#include <linux/pci_hotplug.h> |
1da177e4c Linux-2.6.12-rc2 |
14 15 16 |
#include <linux/slab.h> #include <linux/module.h> #include <linux/cpumask.h> |
b07461a8e PCI/AER: Clear er... |
17 |
#include <linux/aer.h> |
29dbe1f0a PCI: ACPI: Add su... |
18 |
#include <linux/acpi.h> |
690f43041 PCI: Scan all fun... |
19 |
#include <linux/hypervisor.h> |
788858ebc PCI: Look up IRQ ... |
20 |
#include <linux/irqdomain.h> |
d963f6512 PCI: Power on bri... |
21 |
#include <linux/pm_runtime.h> |
bc56b9e01 [PATCH] PCI: Clea... |
22 |
#include "pci.h" |
1da177e4c Linux-2.6.12-rc2 |
23 24 25 |
#define CARDBUS_LATENCY_TIMER 176 /* secondary latency timer */ #define CARDBUS_RESERVE_BUSNR 3 |
1da177e4c Linux-2.6.12-rc2 |
26 |
|
0b950f0f3 PCI: Make local f... |
27 |
static struct resource busn_resource = { |
67cdc8272 PCI: add default ... |
28 29 30 31 32 |
.name = "PCI busn", .start = 0, .end = 255, .flags = IORESOURCE_BUS, }; |
1da177e4c Linux-2.6.12-rc2 |
33 34 35 |
/* Ugh. Need to stop exporting this to modules. */ LIST_HEAD(pci_root_buses); EXPORT_SYMBOL(pci_root_buses); |
5cc62c202 PCI: build a bus ... |
36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 |
static LIST_HEAD(pci_domain_busn_res_list); struct pci_domain_busn_res { struct list_head list; struct resource res; int domain_nr; }; static struct resource *get_pci_domain_busn_res(int domain_nr) { struct pci_domain_busn_res *r; list_for_each_entry(r, &pci_domain_busn_res_list, list) if (r->domain_nr == domain_nr) return &r->res; r = kzalloc(sizeof(*r), GFP_KERNEL); if (!r) return NULL; r->domain_nr = domain_nr; r->res.start = 0; r->res.end = 0xff; r->res.flags = IORESOURCE_BUS | IORESOURCE_PCI_FIXED; list_add_tail(&r->list, &pci_domain_busn_res_list); return &r->res; } |
ed4aaadb1 fix jvc cdrom dri... |
65 |
/* |
3e466e2d3 PCI: Tidy up pci/... |
66 67 |
* Some device drivers need know if PCI is initiated. * Basically, we think PCI is not initiated when there |
70308923d PCI: make no_pci_... |
68 |
* is no device to be found on the pci_bus_type. |
ed4aaadb1 fix jvc cdrom dri... |
69 70 71 |
*/ int no_pci_devices(void) { |
70308923d PCI: make no_pci_... |
72 73 |
struct device *dev; int no_devices; |
ed4aaadb1 fix jvc cdrom dri... |
74 |
|
6bf85ba9e drivers: Add gene... |
75 |
dev = bus_find_next_device(&pci_bus_type, NULL); |
70308923d PCI: make no_pci_... |
76 77 78 79 |
no_devices = (dev == NULL); put_device(dev); return no_devices; } |
ed4aaadb1 fix jvc cdrom dri... |
80 |
EXPORT_SYMBOL(no_pci_devices); |
1da177e4c Linux-2.6.12-rc2 |
81 |
/* |
1da177e4c Linux-2.6.12-rc2 |
82 83 |
* PCI Bus Class */ |
fd7d1ced2 PCI: make pci_bus... |
84 |
static void release_pcibus_dev(struct device *dev) |
1da177e4c Linux-2.6.12-rc2 |
85 |
{ |
fd7d1ced2 PCI: make pci_bus... |
86 |
struct pci_bus *pci_bus = to_pci_bus(dev); |
1da177e4c Linux-2.6.12-rc2 |
87 |
|
ff0387c37 PCI: Delete unnec... |
88 |
put_device(pci_bus->bridge); |
2fe2abf89 PCI: augment bus ... |
89 |
pci_bus_remove_resources(pci_bus); |
98d9f30c8 pci/of: Match PCI... |
90 |
pci_release_bus_of_node(pci_bus); |
1da177e4c Linux-2.6.12-rc2 |
91 92 93 94 95 |
kfree(pci_bus); } static struct class pcibus_class = { .name = "pci_bus", |
fd7d1ced2 PCI: make pci_bus... |
96 |
.dev_release = &release_pcibus_dev, |
56039e658 PCI: Convert clas... |
97 |
.dev_groups = pcibus_groups, |
1da177e4c Linux-2.6.12-rc2 |
98 99 100 101 102 103 104 |
}; static int __init pcibus_class_init(void) { return class_register(&pcibus_class); } postcore_initcall(pcibus_class_init); |
6ac665c63 PCI: rewrite PCI ... |
105 |
static u64 pci_size(u64 base, u64 maxbase, u64 mask) |
1da177e4c Linux-2.6.12-rc2 |
106 |
{ |
6ac665c63 PCI: rewrite PCI ... |
107 |
u64 size = mask & maxbase; /* Find the significant bits */ |
1da177e4c Linux-2.6.12-rc2 |
108 109 |
if (!size) return 0; |
3e466e2d3 PCI: Tidy up pci/... |
110 111 112 113 |
/* * Get the lowest of them to find the decode size, and from that * the extent. */ |
01b37f851 PCI: Make pci_siz... |
114 |
size = size & ~(size-1); |
1da177e4c Linux-2.6.12-rc2 |
115 |
|
3e466e2d3 PCI: Tidy up pci/... |
116 117 118 119 |
/* * base == maxbase can be valid only if the BAR has already been * programmed with all 1s. */ |
01b37f851 PCI: Make pci_siz... |
120 |
if (base == maxbase && ((base | (size - 1)) & mask) != mask) |
1da177e4c Linux-2.6.12-rc2 |
121 122 123 124 |
return 0; return size; } |
28c6821a0 PCI: fold pci_cal... |
125 |
static inline unsigned long decode_bar(struct pci_dev *dev, u32 bar) |
6ac665c63 PCI: rewrite PCI ... |
126 |
{ |
8d6a6a476 PCI: treat mem BA... |
127 |
u32 mem_type; |
28c6821a0 PCI: fold pci_cal... |
128 |
unsigned long flags; |
8d6a6a476 PCI: treat mem BA... |
129 |
|
6ac665c63 PCI: rewrite PCI ... |
130 |
if ((bar & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) { |
28c6821a0 PCI: fold pci_cal... |
131 132 133 |
flags = bar & ~PCI_BASE_ADDRESS_IO_MASK; flags |= IORESOURCE_IO; return flags; |
6ac665c63 PCI: rewrite PCI ... |
134 |
} |
07eddf3d5 PCI: check szhi w... |
135 |
|
28c6821a0 PCI: fold pci_cal... |
136 137 138 139 |
flags = bar & ~PCI_BASE_ADDRESS_MEM_MASK; flags |= IORESOURCE_MEM; if (flags & PCI_BASE_ADDRESS_MEM_PREFETCH) flags |= IORESOURCE_PREFETCH; |
07eddf3d5 PCI: check szhi w... |
140 |
|
8d6a6a476 PCI: treat mem BA... |
141 142 143 144 145 |
mem_type = bar & PCI_BASE_ADDRESS_MEM_TYPE_MASK; switch (mem_type) { case PCI_BASE_ADDRESS_MEM_TYPE_32: break; case PCI_BASE_ADDRESS_MEM_TYPE_1M: |
0ff9514b5 PCI: Don't print ... |
146 |
/* 1M mem BAR treated as 32-bit BAR */ |
8d6a6a476 PCI: treat mem BA... |
147 148 |
break; case PCI_BASE_ADDRESS_MEM_TYPE_64: |
28c6821a0 PCI: fold pci_cal... |
149 150 |
flags |= IORESOURCE_MEM_64; break; |
8d6a6a476 PCI: treat mem BA... |
151 |
default: |
0ff9514b5 PCI: Don't print ... |
152 |
/* mem unknown type treated as 32-bit BAR */ |
8d6a6a476 PCI: treat mem BA... |
153 154 |
break; } |
28c6821a0 PCI: fold pci_cal... |
155 |
return flags; |
07eddf3d5 PCI: check szhi w... |
156 |
} |
808e34e2c PCI: Disable deco... |
157 |
#define PCI_COMMAND_DECODE_ENABLE (PCI_COMMAND_MEMORY | PCI_COMMAND_IO) |
0b400c7ed PCI: export __pci... |
158 |
/** |
3e466e2d3 PCI: Tidy up pci/... |
159 |
* pci_read_base - Read a PCI BAR |
0b400c7ed PCI: export __pci... |
160 161 162 163 164 165 |
* @dev: the PCI device * @type: type of the BAR * @res: resource buffer to be filled in * @pos: BAR position in the config space * * Returns 1 if the BAR is 64-bit, or 0 if 32-bit. |
6ac665c63 PCI: rewrite PCI ... |
166 |
*/ |
0b400c7ed PCI: export __pci... |
167 |
int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, |
3c78bc61f PCI: Whitespace c... |
168 |
struct resource *res, unsigned int pos) |
07eddf3d5 PCI: check szhi w... |
169 |
{ |
dc5205ef4 PCI: Improve __pc... |
170 |
u32 l = 0, sz = 0, mask; |
23b13bc76 PCI: Fail safely ... |
171 |
u64 l64, sz64, mask64; |
253d2e549 PCI: disable mmio... |
172 |
u16 orig_cmd; |
cf4d1cf5a PCI: Unset resour... |
173 |
struct pci_bus_region region, inverted_region; |
6ac665c63 PCI: rewrite PCI ... |
174 |
|
1ed674391 PCI: fix nit in R... |
175 |
mask = type ? PCI_ROM_ADDRESS_MASK : ~0; |
6ac665c63 PCI: rewrite PCI ... |
176 |
|
0ff9514b5 PCI: Don't print ... |
177 |
/* No printks while decoding is disabled! */ |
253d2e549 PCI: disable mmio... |
178 179 |
if (!dev->mmio_always_on) { pci_read_config_word(dev, PCI_COMMAND, &orig_cmd); |
808e34e2c PCI: Disable deco... |
180 181 182 183 |
if (orig_cmd & PCI_COMMAND_DECODE_ENABLE) { pci_write_config_word(dev, PCI_COMMAND, orig_cmd & ~PCI_COMMAND_DECODE_ENABLE); } |
253d2e549 PCI: disable mmio... |
184 |
} |
6ac665c63 PCI: rewrite PCI ... |
185 186 187 |
res->name = pci_name(dev); pci_read_config_dword(dev, pos, &l); |
1ed674391 PCI: fix nit in R... |
188 |
pci_write_config_dword(dev, pos, l | mask); |
6ac665c63 PCI: rewrite PCI ... |
189 190 191 192 193 |
pci_read_config_dword(dev, pos, &sz); pci_write_config_dword(dev, pos, l); /* * All bits set in sz means the device isn't working properly. |
45aa23b4c PCI: revert broke... |
194 195 196 |
* If the BAR isn't implemented, all bits must be 0. If it's a * memory BAR or a ROM, bit 0 must be clear; if it's an io BAR, bit * 1 must be clear. |
6ac665c63 PCI: rewrite PCI ... |
197 |
*/ |
f795d86aa PCI: Shrink decod... |
198 199 |
if (sz == 0xffffffff) sz = 0; |
6ac665c63 PCI: rewrite PCI ... |
200 201 202 203 204 205 206 207 208 |
/* * I don't know how l can have all bits set. Copied from old code. * Maybe it fixes a bug on some ancient platform. */ if (l == 0xffffffff) l = 0; if (type == pci_bar_unknown) { |
28c6821a0 PCI: fold pci_cal... |
209 210 211 |
res->flags = decode_bar(dev, l); res->flags |= IORESOURCE_SIZEALIGN; if (res->flags & IORESOURCE_IO) { |
f795d86aa PCI: Shrink decod... |
212 213 214 |
l64 = l & PCI_BASE_ADDRESS_IO_MASK; sz64 = sz & PCI_BASE_ADDRESS_IO_MASK; mask64 = PCI_BASE_ADDRESS_IO_MASK & (u32)IO_SPACE_LIMIT; |
6ac665c63 PCI: rewrite PCI ... |
215 |
} else { |
f795d86aa PCI: Shrink decod... |
216 217 218 |
l64 = l & PCI_BASE_ADDRESS_MEM_MASK; sz64 = sz & PCI_BASE_ADDRESS_MEM_MASK; mask64 = (u32)PCI_BASE_ADDRESS_MEM_MASK; |
6ac665c63 PCI: rewrite PCI ... |
219 220 |
} } else { |
7a6d312b5 PCI: Decouple IOR... |
221 222 |
if (l & PCI_ROM_ADDRESS_ENABLE) res->flags |= IORESOURCE_ROM_ENABLE; |
f795d86aa PCI: Shrink decod... |
223 224 |
l64 = l & PCI_ROM_ADDRESS_MASK; sz64 = sz & PCI_ROM_ADDRESS_MASK; |
76dc52684 PCI: Make PCI_ROM... |
225 |
mask64 = PCI_ROM_ADDRESS_MASK; |
6ac665c63 PCI: rewrite PCI ... |
226 |
} |
28c6821a0 PCI: fold pci_cal... |
227 |
if (res->flags & IORESOURCE_MEM_64) { |
6ac665c63 PCI: rewrite PCI ... |
228 229 230 231 232 233 234 |
pci_read_config_dword(dev, pos + 4, &l); pci_write_config_dword(dev, pos + 4, ~0); pci_read_config_dword(dev, pos + 4, &sz); pci_write_config_dword(dev, pos + 4, l); l64 |= ((u64)l << 32); sz64 |= ((u64)sz << 32); |
f795d86aa PCI: Shrink decod... |
235 236 |
mask64 |= ((u64)~0 << 32); } |
6ac665c63 PCI: rewrite PCI ... |
237 |
|
f795d86aa PCI: Shrink decod... |
238 239 |
if (!dev->mmio_always_on && (orig_cmd & PCI_COMMAND_DECODE_ENABLE)) pci_write_config_word(dev, PCI_COMMAND, orig_cmd); |
6ac665c63 PCI: rewrite PCI ... |
240 |
|
f795d86aa PCI: Shrink decod... |
241 242 |
if (!sz64) goto fail; |
6ac665c63 PCI: rewrite PCI ... |
243 |
|
f795d86aa PCI: Shrink decod... |
244 |
sz64 = pci_size(l64, sz64, mask64); |
7e79c5f8c PCI: Add informat... |
245 |
if (!sz64) { |
7506dc798 PCI: Add wrappers... |
246 247 |
pci_info(dev, FW_BUG "reg 0x%x: invalid BAR (can't size) ", |
7e79c5f8c PCI: Add informat... |
248 |
pos); |
f795d86aa PCI: Shrink decod... |
249 |
goto fail; |
7e79c5f8c PCI: Add informat... |
250 |
} |
f795d86aa PCI: Shrink decod... |
251 252 |
if (res->flags & IORESOURCE_MEM_64) { |
3a9ad0b4f PCI: Add pci_bus_... |
253 254 |
if ((sizeof(pci_bus_addr_t) < 8 || sizeof(resource_size_t) < 8) && sz64 > 0x100000000ULL) { |
23b13bc76 PCI: Fail safely ... |
255 256 257 |
res->flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED; res->start = 0; res->end = 0; |
7506dc798 PCI: Add wrappers... |
258 259 |
pci_err(dev, "reg 0x%x: can't handle BAR larger than 4GB (size %#010llx) ", |
f795d86aa PCI: Shrink decod... |
260 |
pos, (unsigned long long)sz64); |
23b13bc76 PCI: Fail safely ... |
261 |
goto out; |
c7dabef8a vsprintf: use %pR... |
262 |
} |
3a9ad0b4f PCI: Add pci_bus_... |
263 |
if ((sizeof(pci_bus_addr_t) < 8) && l) { |
31e9dd256 PCI: Don't set BA... |
264 |
/* Above 32-bit boundary; try to reallocate */ |
c83bd900a PCI: Mark 64-bit ... |
265 |
res->flags |= IORESOURCE_UNSET; |
72dc5601f PCI: Don't conver... |
266 |
res->start = 0; |
01b37f851 PCI: Make pci_siz... |
267 |
res->end = sz64 - 1; |
7506dc798 PCI: Add wrappers... |
268 269 |
pci_info(dev, "reg 0x%x: can't handle BAR above 4GB (bus address %#010llx) ", |
f795d86aa PCI: Shrink decod... |
270 |
pos, (unsigned long long)l64); |
72dc5601f PCI: Don't conver... |
271 |
goto out; |
6ac665c63 PCI: rewrite PCI ... |
272 |
} |
6ac665c63 PCI: rewrite PCI ... |
273 |
} |
f795d86aa PCI: Shrink decod... |
274 |
region.start = l64; |
01b37f851 PCI: Make pci_siz... |
275 |
region.end = l64 + sz64 - 1; |
f795d86aa PCI: Shrink decod... |
276 |
|
fc2798502 PCI: Convert pcib... |
277 278 |
pcibios_bus_to_resource(dev->bus, res, ®ion); pcibios_resource_to_bus(dev->bus, &inverted_region, res); |
cf4d1cf5a PCI: Unset resour... |
279 280 281 282 283 284 285 286 287 288 289 290 291 |
/* * If "A" is a BAR value (a bus address), "bus_to_resource(A)" is * the corresponding resource address (the physical address used by * the CPU. Converting that resource address back to a bus address * should yield the original BAR value: * * resource_to_bus(bus_to_resource(A)) == A * * If it doesn't, CPU accesses to "bus_to_resource(A)" will not * be claimed by the device. */ if (inverted_region.start != region.start) { |
cf4d1cf5a PCI: Unset resour... |
292 |
res->flags |= IORESOURCE_UNSET; |
cf4d1cf5a PCI: Unset resour... |
293 |
res->start = 0; |
26370fc66 PCI: Don't print ... |
294 |
res->end = region.end - region.start; |
7506dc798 PCI: Add wrappers... |
295 296 |
pci_info(dev, "reg 0x%x: initial BAR value %#010llx invalid ", |
f795d86aa PCI: Shrink decod... |
297 |
pos, (unsigned long long)region.start); |
cf4d1cf5a PCI: Unset resour... |
298 |
} |
96ddef25b PCI: Consolidate ... |
299 |
|
0ff9514b5 PCI: Don't print ... |
300 301 302 303 304 305 |
goto out; fail: res->flags = 0; out: |
31e9dd256 PCI: Don't set BA... |
306 |
if (res->flags) |
34c6b7105 PCI: Replace dev_... |
307 308 |
pci_info(dev, "reg 0x%x: %pR ", pos, res); |
0ff9514b5 PCI: Don't print ... |
309 |
|
28c6821a0 PCI: fold pci_cal... |
310 |
return (res->flags & IORESOURCE_MEM_64) ? 1 : 0; |
07eddf3d5 PCI: check szhi w... |
311 |
} |
1da177e4c Linux-2.6.12-rc2 |
312 313 |
static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom) { |
6ac665c63 PCI: rewrite PCI ... |
314 |
unsigned int pos, reg; |
07eddf3d5 PCI: check szhi w... |
315 |
|
ad67b437f PCI: Disable all ... |
316 317 |
if (dev->non_compliant_bars) return; |
bf4447fd1 PCI/IOV: Skip BAR... |
318 319 320 |
/* Per PCIe r4.0, sec 9.3.4.1.11, the VF BARs are all RO Zero */ if (dev->is_virtfn) return; |
6ac665c63 PCI: rewrite PCI ... |
321 322 |
for (pos = 0; pos < howmany; pos++) { struct resource *res = &dev->resource[pos]; |
1da177e4c Linux-2.6.12-rc2 |
323 |
reg = PCI_BASE_ADDRESS_0 + (pos << 2); |
6ac665c63 PCI: rewrite PCI ... |
324 |
pos += __pci_read_base(dev, pci_bar_unknown, res, reg); |
1da177e4c Linux-2.6.12-rc2 |
325 |
} |
6ac665c63 PCI: rewrite PCI ... |
326 |
|
1da177e4c Linux-2.6.12-rc2 |
327 |
if (rom) { |
6ac665c63 PCI: rewrite PCI ... |
328 |
struct resource *res = &dev->resource[PCI_ROM_RESOURCE]; |
1da177e4c Linux-2.6.12-rc2 |
329 |
dev->rom_base_reg = rom; |
6ac665c63 PCI: rewrite PCI ... |
330 |
res->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH | |
92b19ff50 cleanup IORESOURC... |
331 |
IORESOURCE_READONLY | IORESOURCE_SIZEALIGN; |
6ac665c63 PCI: rewrite PCI ... |
332 |
__pci_read_base(dev, pci_bar_mem32, res, rom); |
1da177e4c Linux-2.6.12-rc2 |
333 334 |
} } |
51c48b310 PCI: Probe bridge... |
335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 |
static void pci_read_bridge_windows(struct pci_dev *bridge) { u16 io; u32 pmem, tmp; pci_read_config_word(bridge, PCI_IO_BASE, &io); if (!io) { pci_write_config_word(bridge, PCI_IO_BASE, 0xe0f0); pci_read_config_word(bridge, PCI_IO_BASE, &io); pci_write_config_word(bridge, PCI_IO_BASE, 0x0); } if (io) bridge->io_window = 1; /* * DECchip 21050 pass 2 errata: the bridge may miss an address * disconnect boundary by one PCI data phase. Workaround: do not * use prefetching on this device. */ if (bridge->vendor == PCI_VENDOR_ID_DEC && bridge->device == 0x0001) return; pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); if (!pmem) { pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 0xffe0fff0); pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 0x0); } if (!pmem) return; bridge->pref_window = 1; if ((pmem & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) { /* * Bridge claims to have a 64-bit prefetchable memory * window; verify that the upper bits are actually * writable. */ pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, &pmem); pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 0xffffffff); pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, &tmp); pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, pmem); if (tmp) bridge->pref_64_window = 1; } } |
15856ad50 PCI: Remove __dev... |
385 |
static void pci_read_bridge_io(struct pci_bus *child) |
1da177e4c Linux-2.6.12-rc2 |
386 387 388 |
{ struct pci_dev *dev = child->self; u8 io_base_lo, io_limit_lo; |
2b28ae191 PCI: reimplement ... |
389 |
unsigned long io_mask, io_granularity, base, limit; |
5bfa14ed9 PCI: convert bus ... |
390 |
struct pci_bus_region region; |
2b28ae191 PCI: reimplement ... |
391 392 393 394 395 396 397 398 399 |
struct resource *res; io_mask = PCI_IO_RANGE_MASK; io_granularity = 0x1000; if (dev->io_window_1k) { /* Support 1K I/O space granularity */ io_mask = PCI_IO_1K_RANGE_MASK; io_granularity = 0x400; } |
1da177e4c Linux-2.6.12-rc2 |
400 |
|
1da177e4c Linux-2.6.12-rc2 |
401 402 403 |
res = child->resource[0]; pci_read_config_byte(dev, PCI_IO_BASE, &io_base_lo); pci_read_config_byte(dev, PCI_IO_LIMIT, &io_limit_lo); |
2b28ae191 PCI: reimplement ... |
404 405 |
base = (io_base_lo & io_mask) << 8; limit = (io_limit_lo & io_mask) << 8; |
1da177e4c Linux-2.6.12-rc2 |
406 407 408 |
if ((io_base_lo & PCI_IO_RANGE_TYPE_MASK) == PCI_IO_RANGE_TYPE_32) { u16 io_base_hi, io_limit_hi; |
8f38eaca5 PCI: fix P2P brid... |
409 |
|
1da177e4c Linux-2.6.12-rc2 |
410 411 |
pci_read_config_word(dev, PCI_IO_BASE_UPPER16, &io_base_hi); pci_read_config_word(dev, PCI_IO_LIMIT_UPPER16, &io_limit_hi); |
8f38eaca5 PCI: fix P2P brid... |
412 413 |
base |= ((unsigned long) io_base_hi << 16); limit |= ((unsigned long) io_limit_hi << 16); |
1da177e4c Linux-2.6.12-rc2 |
414 |
} |
5dde383e2 PCI: allow P2P br... |
415 |
if (base <= limit) { |
1da177e4c Linux-2.6.12-rc2 |
416 |
res->flags = (io_base_lo & PCI_IO_RANGE_TYPE_MASK) | IORESOURCE_IO; |
5bfa14ed9 PCI: convert bus ... |
417 |
region.start = base; |
2b28ae191 PCI: reimplement ... |
418 |
region.end = limit + io_granularity - 1; |
fc2798502 PCI: Convert pcib... |
419 |
pcibios_bus_to_resource(dev->bus, res, ®ion); |
34c6b7105 PCI: Replace dev_... |
420 421 |
pci_info(dev, " bridge window %pR ", res); |
1da177e4c Linux-2.6.12-rc2 |
422 |
} |
fa27b2d10 PCI: split up pci... |
423 |
} |
15856ad50 PCI: Remove __dev... |
424 |
static void pci_read_bridge_mmio(struct pci_bus *child) |
fa27b2d10 PCI: split up pci... |
425 426 427 428 |
{ struct pci_dev *dev = child->self; u16 mem_base_lo, mem_limit_lo; unsigned long base, limit; |
5bfa14ed9 PCI: convert bus ... |
429 |
struct pci_bus_region region; |
fa27b2d10 PCI: split up pci... |
430 |
struct resource *res; |
1da177e4c Linux-2.6.12-rc2 |
431 432 433 434 |
res = child->resource[1]; pci_read_config_word(dev, PCI_MEMORY_BASE, &mem_base_lo); pci_read_config_word(dev, PCI_MEMORY_LIMIT, &mem_limit_lo); |
8f38eaca5 PCI: fix P2P brid... |
435 436 |
base = ((unsigned long) mem_base_lo & PCI_MEMORY_RANGE_MASK) << 16; limit = ((unsigned long) mem_limit_lo & PCI_MEMORY_RANGE_MASK) << 16; |
5dde383e2 PCI: allow P2P br... |
437 |
if (base <= limit) { |
1da177e4c Linux-2.6.12-rc2 |
438 |
res->flags = (mem_base_lo & PCI_MEMORY_RANGE_TYPE_MASK) | IORESOURCE_MEM; |
5bfa14ed9 PCI: convert bus ... |
439 440 |
region.start = base; region.end = limit + 0xfffff; |
fc2798502 PCI: Convert pcib... |
441 |
pcibios_bus_to_resource(dev->bus, res, ®ion); |
34c6b7105 PCI: Replace dev_... |
442 443 |
pci_info(dev, " bridge window %pR ", res); |
1da177e4c Linux-2.6.12-rc2 |
444 |
} |
fa27b2d10 PCI: split up pci... |
445 |
} |
15856ad50 PCI: Remove __dev... |
446 |
static void pci_read_bridge_mmio_pref(struct pci_bus *child) |
fa27b2d10 PCI: split up pci... |
447 448 449 |
{ struct pci_dev *dev = child->self; u16 mem_base_lo, mem_limit_lo; |
7fc986d8a PCI: Support 64-b... |
450 |
u64 base64, limit64; |
3a9ad0b4f PCI: Add pci_bus_... |
451 |
pci_bus_addr_t base, limit; |
5bfa14ed9 PCI: convert bus ... |
452 |
struct pci_bus_region region; |
fa27b2d10 PCI: split up pci... |
453 |
struct resource *res; |
1da177e4c Linux-2.6.12-rc2 |
454 455 456 457 |
res = child->resource[2]; pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo); pci_read_config_word(dev, PCI_PREF_MEMORY_LIMIT, &mem_limit_lo); |
7fc986d8a PCI: Support 64-b... |
458 459 |
base64 = (mem_base_lo & PCI_PREF_RANGE_MASK) << 16; limit64 = (mem_limit_lo & PCI_PREF_RANGE_MASK) << 16; |
1da177e4c Linux-2.6.12-rc2 |
460 461 462 |
if ((mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) { u32 mem_base_hi, mem_limit_hi; |
8f38eaca5 PCI: fix P2P brid... |
463 |
|
1da177e4c Linux-2.6.12-rc2 |
464 465 466 467 468 469 470 471 472 |
pci_read_config_dword(dev, PCI_PREF_BASE_UPPER32, &mem_base_hi); pci_read_config_dword(dev, PCI_PREF_LIMIT_UPPER32, &mem_limit_hi); /* * Some bridges set the base > limit by default, and some * (broken) BIOSes do not initialize them. If we find * this, just assume they are not being used. */ if (mem_base_hi <= mem_limit_hi) { |
7fc986d8a PCI: Support 64-b... |
473 474 |
base64 |= (u64) mem_base_hi << 32; limit64 |= (u64) mem_limit_hi << 32; |
1da177e4c Linux-2.6.12-rc2 |
475 476 |
} } |
7fc986d8a PCI: Support 64-b... |
477 |
|
3a9ad0b4f PCI: Add pci_bus_... |
478 479 |
base = (pci_bus_addr_t) base64; limit = (pci_bus_addr_t) limit64; |
7fc986d8a PCI: Support 64-b... |
480 481 |
if (base != base64) { |
7506dc798 PCI: Add wrappers... |
482 483 |
pci_err(dev, "can't handle bridge window above 4GB (bus address %#010llx) ", |
7fc986d8a PCI: Support 64-b... |
484 485 486 |
(unsigned long long) base64); return; } |
5dde383e2 PCI: allow P2P br... |
487 |
if (base <= limit) { |
1f82de10d PCI/x86: don't as... |
488 489 490 491 |
res->flags = (mem_base_lo & PCI_PREF_RANGE_TYPE_MASK) | IORESOURCE_MEM | IORESOURCE_PREFETCH; if (res->flags & PCI_PREF_RANGE_TYPE_64) res->flags |= IORESOURCE_MEM_64; |
5bfa14ed9 PCI: convert bus ... |
492 493 |
region.start = base; region.end = limit + 0xfffff; |
fc2798502 PCI: Convert pcib... |
494 |
pcibios_bus_to_resource(dev->bus, res, ®ion); |
34c6b7105 PCI: Replace dev_... |
495 496 |
pci_info(dev, " bridge window %pR ", res); |
1da177e4c Linux-2.6.12-rc2 |
497 498 |
} } |
15856ad50 PCI: Remove __dev... |
499 |
void pci_read_bridge_bases(struct pci_bus *child) |
fa27b2d10 PCI: split up pci... |
500 501 |
{ struct pci_dev *dev = child->self; |
2fe2abf89 PCI: augment bus ... |
502 |
struct resource *res; |
fa27b2d10 PCI: split up pci... |
503 504 505 506 |
int i; if (pci_is_root_bus(child)) /* It's a host bus, nothing to read */ return; |
7506dc798 PCI: Add wrappers... |
507 508 |
pci_info(dev, "PCI bridge to %pR%s ", |
b918c62e0 PCI: replace stru... |
509 |
&child->busn_res, |
fa27b2d10 PCI: split up pci... |
510 |
dev->transparent ? " (subtractive decode)" : ""); |
2fe2abf89 PCI: augment bus ... |
511 512 513 |
pci_bus_remove_resources(child); for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) child->resource[i] = &dev->resource[PCI_BRIDGE_RESOURCES+i]; |
fa27b2d10 PCI: split up pci... |
514 515 516 |
pci_read_bridge_io(child); pci_read_bridge_mmio(child); pci_read_bridge_mmio_pref(child); |
2adf75160 PCI: read bridge ... |
517 518 |
if (dev->transparent) { |
2fe2abf89 PCI: augment bus ... |
519 |
pci_bus_for_each_resource(child->parent, res, i) { |
d739a099d PCI: Don't add di... |
520 |
if (res && res->flags) { |
2fe2abf89 PCI: augment bus ... |
521 522 |
pci_bus_add_resource(child, res, PCI_SUBTRACTIVE_DECODE); |
34c6b7105 PCI: Replace dev_... |
523 524 |
pci_info(dev, " bridge window %pR (subtractive decode) ", |
2fe2abf89 PCI: augment bus ... |
525 526 |
res); } |
2adf75160 PCI: read bridge ... |
527 528 |
} } |
fa27b2d10 PCI: split up pci... |
529 |
} |
670ba0c88 PCI: Add generic ... |
530 |
static struct pci_bus *pci_alloc_bus(struct pci_bus *parent) |
1da177e4c Linux-2.6.12-rc2 |
531 532 |
{ struct pci_bus *b; |
f5afe8064 [PATCH] PCI: kzal... |
533 |
b = kzalloc(sizeof(*b), GFP_KERNEL); |
050134864 PCI: Return early... |
534 535 536 537 538 539 540 541 542 543 |
if (!b) return NULL; INIT_LIST_HEAD(&b->node); INIT_LIST_HEAD(&b->children); INIT_LIST_HEAD(&b->devices); INIT_LIST_HEAD(&b->slots); INIT_LIST_HEAD(&b->resources); b->max_bus_speed = PCI_SPEED_UNKNOWN; b->cur_bus_speed = PCI_SPEED_UNKNOWN; |
670ba0c88 PCI: Add generic ... |
544 545 546 547 |
#ifdef CONFIG_PCI_DOMAINS_GENERIC if (parent) b->domain_nr = parent->domain_nr; #endif |
1da177e4c Linux-2.6.12-rc2 |
548 549 |
return b; } |
9885440b1 PCI: Fix pci_host... |
550 |
static void pci_release_host_bridge_dev(struct device *dev) |
70efde2a2 PCI: Rename pci_r... |
551 552 553 554 555 |
{ struct pci_host_bridge *bridge = to_pci_host_bridge(dev); if (bridge->release_fn) bridge->release_fn(bridge); |
3bbce5317 PCI: Fix devm_pci... |
556 557 |
pci_free_resource_list(&bridge->windows); |
7608158df PCI: Fix missing ... |
558 |
pci_free_resource_list(&bridge->dma_ranges); |
9885440b1 PCI: Fix pci_host... |
559 |
kfree(bridge); |
70efde2a2 PCI: Rename pci_r... |
560 |
} |
6302bf3ef PCI: Init PCIe fe... |
561 |
static void pci_init_host_bridge(struct pci_host_bridge *bridge) |
7b5436635 PCI: add generic ... |
562 |
{ |
050134864 PCI: Return early... |
563 |
INIT_LIST_HEAD(&bridge->windows); |
e80a91ad3 PCI: Add dma_rang... |
564 |
INIT_LIST_HEAD(&bridge->dma_ranges); |
37d6a0a6f PCI: Add pci_regi... |
565 |
|
02bfeb484 PCI/portdrv: Simp... |
566 567 568 569 570 571 572 |
/* * We assume we can manage these PCIe features. Some systems may * reserve these for use by the platform itself, e.g., an ACPI BIOS * may implement its own AER handling and use _OSC to prevent the * OS from interfering. */ bridge->native_aer = 1; |
9310f0dc1 PCI: pciehp: Rena... |
573 |
bridge->native_pcie_hotplug = 1; |
1df81a6d6 PCI: shpchp: Requ... |
574 |
bridge->native_shpc_hotplug = 1; |
02bfeb484 PCI/portdrv: Simp... |
575 |
bridge->native_pme = 1; |
af8bb9f89 PCI/ACPI: Request... |
576 |
bridge->native_ltr = 1; |
ac1c8e35a PCI/DPC: Add Erro... |
577 |
bridge->native_dpc = 1; |
9885440b1 PCI: Fix pci_host... |
578 579 |
device_initialize(&bridge->dev); |
6302bf3ef PCI: Init PCIe fe... |
580 581 582 583 584 585 586 587 588 589 590 591 |
} struct pci_host_bridge *pci_alloc_host_bridge(size_t priv) { struct pci_host_bridge *bridge; bridge = kzalloc(sizeof(*bridge) + priv, GFP_KERNEL); if (!bridge) return NULL; pci_init_host_bridge(bridge); bridge->dev.release = pci_release_host_bridge_dev; |
02bfeb484 PCI/portdrv: Simp... |
592 |
|
7b5436635 PCI: add generic ... |
593 594 |
return bridge; } |
a52d1443b PCI: Export host ... |
595 |
EXPORT_SYMBOL(pci_alloc_host_bridge); |
7b5436635 PCI: add generic ... |
596 |
|
9885440b1 PCI: Fix pci_host... |
597 598 599 600 |
static void devm_pci_alloc_host_bridge_release(void *data) { pci_free_host_bridge(data); } |
5c3f18cce PCI: Add devm_pci... |
601 602 603 |
struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev, size_t priv) { |
9885440b1 PCI: Fix pci_host... |
604 |
int ret; |
5c3f18cce PCI: Add devm_pci... |
605 |
struct pci_host_bridge *bridge; |
9885440b1 PCI: Fix pci_host... |
606 |
bridge = pci_alloc_host_bridge(priv); |
5c3f18cce PCI: Add devm_pci... |
607 608 |
if (!bridge) return NULL; |
6a589900d PCI: Set default ... |
609 |
bridge->dev.parent = dev; |
9885440b1 PCI: Fix pci_host... |
610 611 612 613 |
ret = devm_add_action_or_reset(dev, devm_pci_alloc_host_bridge_release, bridge); if (ret) return NULL; |
5c3f18cce PCI: Add devm_pci... |
614 |
|
669cbc708 PCI: Move DT reso... |
615 616 617 |
ret = devm_of_pci_bridge_init(dev, bridge); if (ret) return NULL; |
5c3f18cce PCI: Add devm_pci... |
618 619 620 |
return bridge; } EXPORT_SYMBOL(devm_pci_alloc_host_bridge); |
dff79b91b PCI: Add pci_free... |
621 622 |
void pci_free_host_bridge(struct pci_host_bridge *bridge) { |
9885440b1 PCI: Fix pci_host... |
623 |
put_device(&bridge->dev); |
dff79b91b PCI: Add pci_free... |
624 625 |
} EXPORT_SYMBOL(pci_free_host_bridge); |
e56faff57 PCI: Add pci_spee... |
626 |
/* Indexed by PCI_X_SSTATUS_FREQ (secondary bus mode and frequency) */ |
0b950f0f3 PCI: Make local f... |
627 |
static const unsigned char pcix_bus_speed[] = { |
9be60ca04 PCI: Add support ... |
628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 |
PCI_SPEED_UNKNOWN, /* 0 */ PCI_SPEED_66MHz_PCIX, /* 1 */ PCI_SPEED_100MHz_PCIX, /* 2 */ PCI_SPEED_133MHz_PCIX, /* 3 */ PCI_SPEED_UNKNOWN, /* 4 */ PCI_SPEED_66MHz_PCIX_ECC, /* 5 */ PCI_SPEED_100MHz_PCIX_ECC, /* 6 */ PCI_SPEED_133MHz_PCIX_ECC, /* 7 */ PCI_SPEED_UNKNOWN, /* 8 */ PCI_SPEED_66MHz_PCIX_266, /* 9 */ PCI_SPEED_100MHz_PCIX_266, /* A */ PCI_SPEED_133MHz_PCIX_266, /* B */ PCI_SPEED_UNKNOWN, /* C */ PCI_SPEED_66MHz_PCIX_533, /* D */ PCI_SPEED_100MHz_PCIX_533, /* E */ PCI_SPEED_133MHz_PCIX_533 /* F */ }; |
e56faff57 PCI: Add pci_spee... |
645 |
/* Indexed by PCI_EXP_LNKCAP_SLS, PCI_EXP_LNKSTA_CLS */ |
343e51ae6 PCI: expose pcie_... |
646 |
const unsigned char pcie_link_speed[] = { |
3749c51ac PCI: Make current... |
647 648 649 |
PCI_SPEED_UNKNOWN, /* 0 */ PCIE_SPEED_2_5GT, /* 1 */ PCIE_SPEED_5_0GT, /* 2 */ |
9dfd97fe1 PCI: Add support ... |
650 |
PCIE_SPEED_8_0GT, /* 3 */ |
1acfb9b7e PCI: Add decoding... |
651 |
PCIE_SPEED_16_0GT, /* 4 */ |
de76cda21 PCI: Decode PCIe ... |
652 |
PCIE_SPEED_32_0GT, /* 5 */ |
3749c51ac PCI: Make current... |
653 654 655 656 657 658 659 660 661 662 663 |
PCI_SPEED_UNKNOWN, /* 6 */ PCI_SPEED_UNKNOWN, /* 7 */ PCI_SPEED_UNKNOWN, /* 8 */ PCI_SPEED_UNKNOWN, /* 9 */ PCI_SPEED_UNKNOWN, /* A */ PCI_SPEED_UNKNOWN, /* B */ PCI_SPEED_UNKNOWN, /* C */ PCI_SPEED_UNKNOWN, /* D */ PCI_SPEED_UNKNOWN, /* E */ PCI_SPEED_UNKNOWN /* F */ }; |
e56faff57 PCI: Add pci_spee... |
664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 |
EXPORT_SYMBOL_GPL(pcie_link_speed); const char *pci_speed_string(enum pci_bus_speed speed) { /* Indexed by the pci_bus_speed enum */ static const char *speed_strings[] = { "33 MHz PCI", /* 0x00 */ "66 MHz PCI", /* 0x01 */ "66 MHz PCI-X", /* 0x02 */ "100 MHz PCI-X", /* 0x03 */ "133 MHz PCI-X", /* 0x04 */ NULL, /* 0x05 */ NULL, /* 0x06 */ NULL, /* 0x07 */ NULL, /* 0x08 */ "66 MHz PCI-X 266", /* 0x09 */ "100 MHz PCI-X 266", /* 0x0a */ "133 MHz PCI-X 266", /* 0x0b */ "Unknown AGP", /* 0x0c */ "1x AGP", /* 0x0d */ "2x AGP", /* 0x0e */ "4x AGP", /* 0x0f */ "8x AGP", /* 0x10 */ "66 MHz PCI-X 533", /* 0x11 */ "100 MHz PCI-X 533", /* 0x12 */ "133 MHz PCI-X 533", /* 0x13 */ "2.5 GT/s PCIe", /* 0x14 */ "5.0 GT/s PCIe", /* 0x15 */ "8.0 GT/s PCIe", /* 0x16 */ "16.0 GT/s PCIe", /* 0x17 */ "32.0 GT/s PCIe", /* 0x18 */ }; if (speed < ARRAY_SIZE(speed_strings)) return speed_strings[speed]; return "Unknown"; } EXPORT_SYMBOL_GPL(pci_speed_string); |
3749c51ac PCI: Make current... |
702 703 704 |
void pcie_update_link_speed(struct pci_bus *bus, u16 linksta) { |
231afea18 PCI: Use standard... |
705 |
bus->cur_bus_speed = pcie_link_speed[linksta & PCI_EXP_LNKSTA_CLS]; |
3749c51ac PCI: Make current... |
706 707 |
} EXPORT_SYMBOL_GPL(pcie_update_link_speed); |
45b4cdd57 PCI: Add support ... |
708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 |
static unsigned char agp_speeds[] = { AGP_UNKNOWN, AGP_1X, AGP_2X, AGP_4X, AGP_8X }; static enum pci_bus_speed agp_speed(int agp3, int agpstat) { int index = 0; if (agpstat & 4) index = 3; else if (agpstat & 2) index = 2; else if (agpstat & 1) index = 1; else goto out; |
f7625980f PCI: Fix whitespa... |
728 |
|
45b4cdd57 PCI: Add support ... |
729 730 731 732 733 734 735 736 737 |
if (agp3) { index += 2; if (index == 5) index = 0; } out: return agp_speeds[index]; } |
9be60ca04 PCI: Add support ... |
738 739 740 741 |
static void pci_set_bus_speed(struct pci_bus *bus) { struct pci_dev *bridge = bus->self; int pos; |
45b4cdd57 PCI: Add support ... |
742 743 744 745 746 747 748 749 750 751 752 753 |
pos = pci_find_capability(bridge, PCI_CAP_ID_AGP); if (!pos) pos = pci_find_capability(bridge, PCI_CAP_ID_AGP3); if (pos) { u32 agpstat, agpcmd; pci_read_config_dword(bridge, pos + PCI_AGP_STATUS, &agpstat); bus->max_bus_speed = agp_speed(agpstat & 8, agpstat & 7); pci_read_config_dword(bridge, pos + PCI_AGP_COMMAND, &agpcmd); bus->cur_bus_speed = agp_speed(agpstat & 8, agpcmd & 7); } |
9be60ca04 PCI: Add support ... |
754 755 756 757 |
pos = pci_find_capability(bridge, PCI_CAP_ID_PCIX); if (pos) { u16 status; enum pci_bus_speed max; |
9be60ca04 PCI: Add support ... |
758 |
|
7793eeabc PCI: Add and use ... |
759 760 761 762 |
pci_read_config_word(bridge, pos + PCI_X_BRIDGE_SSTATUS, &status); if (status & PCI_X_SSTATUS_533MHZ) { |
9be60ca04 PCI: Add support ... |
763 |
max = PCI_SPEED_133MHz_PCIX_533; |
7793eeabc PCI: Add and use ... |
764 |
} else if (status & PCI_X_SSTATUS_266MHZ) { |
9be60ca04 PCI: Add support ... |
765 |
max = PCI_SPEED_133MHz_PCIX_266; |
7793eeabc PCI: Add and use ... |
766 |
} else if (status & PCI_X_SSTATUS_133MHZ) { |
3c78bc61f PCI: Whitespace c... |
767 |
if ((status & PCI_X_SSTATUS_VERS) == PCI_X_SSTATUS_V2) |
9be60ca04 PCI: Add support ... |
768 |
max = PCI_SPEED_133MHz_PCIX_ECC; |
3c78bc61f PCI: Whitespace c... |
769 |
else |
9be60ca04 PCI: Add support ... |
770 |
max = PCI_SPEED_133MHz_PCIX; |
9be60ca04 PCI: Add support ... |
771 772 773 774 775 |
} else { max = PCI_SPEED_66MHz_PCIX; } bus->max_bus_speed = max; |
7793eeabc PCI: Add and use ... |
776 777 |
bus->cur_bus_speed = pcix_bus_speed[ (status & PCI_X_SSTATUS_FREQ) >> 6]; |
9be60ca04 PCI: Add support ... |
778 779 780 |
return; } |
fdfe15112 PCI: Use pci_is_p... |
781 |
if (pci_is_pcie(bridge)) { |
9be60ca04 PCI: Add support ... |
782 783 |
u32 linkcap; u16 linksta; |
59875ae48 PCI/core: Use PCI... |
784 |
pcie_capability_read_dword(bridge, PCI_EXP_LNKCAP, &linkcap); |
231afea18 PCI: Use standard... |
785 |
bus->max_bus_speed = pcie_link_speed[linkcap & PCI_EXP_LNKCAP_SLS]; |
f0157160b PCI: Make link ac... |
786 |
bridge->link_active_reporting = !!(linkcap & PCI_EXP_LNKCAP_DLLLARC); |
9be60ca04 PCI: Add support ... |
787 |
|
59875ae48 PCI/core: Use PCI... |
788 |
pcie_capability_read_word(bridge, PCI_EXP_LNKSTA, &linksta); |
9be60ca04 PCI: Add support ... |
789 790 791 |
pcie_update_link_speed(bus, linksta); } } |
44aa0c657 PCI/MSI: Add hook... |
792 793 |
static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus) { |
b165e2b60 PCI/MSI: Add supp... |
794 |
struct irq_domain *d; |
44aa0c657 PCI/MSI: Add hook... |
795 796 797 798 |
/* * Any firmware interface that can resolve the msi_domain * should be called from here. */ |
b165e2b60 PCI/MSI: Add supp... |
799 |
d = pci_host_bridge_of_msi_domain(bus); |
471036b2b acpi: pci: Setup ... |
800 801 |
if (!d) d = pci_host_bridge_acpi_msi_domain(bus); |
44aa0c657 PCI/MSI: Add hook... |
802 |
|
788858ebc PCI: Look up IRQ ... |
803 804 805 806 807 808 809 810 811 812 813 814 815 |
#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN /* * If no IRQ domain was found via the OF tree, try looking it up * directly through the fwnode_handle. */ if (!d) { struct fwnode_handle *fwnode = pci_root_bus_fwnode(bus); if (fwnode) d = irq_find_matching_fwnode(fwnode, DOMAIN_BUS_PCI_MSI); } #endif |
b165e2b60 PCI/MSI: Add supp... |
816 |
return d; |
44aa0c657 PCI/MSI: Add hook... |
817 818 819 820 821 |
} static void pci_set_bus_msi_domain(struct pci_bus *bus) { struct irq_domain *d; |
38ea72bdb PCI/MSI: Fix MSI ... |
822 |
struct pci_bus *b; |
44aa0c657 PCI/MSI: Add hook... |
823 824 |
/* |
38ea72bdb PCI/MSI: Fix MSI ... |
825 826 827 |
* The bus can be a root bus, a subordinate bus, or a virtual bus * created by an SR-IOV device. Walk up to the first bridge device * found or derive the domain from the host bridge. |
44aa0c657 PCI/MSI: Add hook... |
828 |
*/ |
38ea72bdb PCI/MSI: Fix MSI ... |
829 830 831 832 833 834 835 |
for (b = bus, d = NULL; !d && !pci_is_root_bus(b); b = b->parent) { if (b->self) d = dev_get_msi_domain(&b->self->dev); } if (!d) d = pci_host_bridge_msi_domain(b); |
44aa0c657 PCI/MSI: Add hook... |
836 837 838 |
dev_set_msi_domain(&bus->dev, d); } |
cea9bc0be PCI: Make pci_reg... |
839 |
static int pci_register_host_bridge(struct pci_host_bridge *bridge) |
37d6a0a6f PCI: Add pci_regi... |
840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 |
{ struct device *parent = bridge->dev.parent; struct resource_entry *window, *n; struct pci_bus *bus, *b; resource_size_t offset; LIST_HEAD(resources); struct resource *res; char addr[64], *fmt; const char *name; int err; bus = pci_alloc_bus(NULL); if (!bus) return -ENOMEM; bridge->bus = bus; |
3e466e2d3 PCI: Tidy up pci/... |
856 |
/* Temporarily move resources off the list */ |
37d6a0a6f PCI: Add pci_regi... |
857 858 859 860 861 862 863 864 865 866 867 |
list_splice_init(&bridge->windows, &resources); bus->sysdata = bridge->sysdata; bus->msi = bridge->msi; bus->ops = bridge->ops; bus->number = bus->busn_res.start = bridge->busnr; #ifdef CONFIG_PCI_DOMAINS_GENERIC bus->domain_nr = pci_bus_find_domain_nr(bus, parent); #endif b = pci_find_bus(pci_domain_nr(bus), bridge->busnr); if (b) { |
3e466e2d3 PCI: Tidy up pci/... |
868 |
/* Ignore it if we already got here via a different bridge */ |
37d6a0a6f PCI: Add pci_regi... |
869 870 871 872 873 874 875 876 877 878 879 880 |
dev_dbg(&b->dev, "bus already known "); err = -EEXIST; goto free; } dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(bus), bridge->busnr); err = pcibios_root_bridge_prepare(bridge); if (err) goto free; |
9885440b1 PCI: Fix pci_host... |
881 |
err = device_add(&bridge->dev); |
1b54ae832 PCI: Fix pci_regi... |
882 |
if (err) { |
37d6a0a6f PCI: Add pci_regi... |
883 |
put_device(&bridge->dev); |
1b54ae832 PCI: Fix pci_regi... |
884 885 |
goto free; } |
37d6a0a6f PCI: Add pci_regi... |
886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 |
bus->bridge = get_device(&bridge->dev); device_enable_async_suspend(bus->bridge); pci_set_bus_of_node(bus); pci_set_bus_msi_domain(bus); if (!parent) set_dev_node(bus->bridge, pcibus_to_node(bus)); bus->dev.class = &pcibus_class; bus->dev.parent = bus->bridge; dev_set_name(&bus->dev, "%04x:%02x", pci_domain_nr(bus), bus->number); name = dev_name(&bus->dev); err = device_register(&bus->dev); if (err) goto unregister; pcibios_add_bus(bus); |
6e8e104d2 PCI: Also call .a... |
905 906 907 908 909 910 |
if (bus->ops->add_bus) { err = bus->ops->add_bus(bus); if (WARN_ON(err < 0)) dev_err(&bus->dev, "failed to add bus: %d ", err); } |
37d6a0a6f PCI: Add pci_regi... |
911 912 913 914 915 916 917 918 919 |
/* Create legacy_io and legacy_mem files for this bus */ pci_create_legacy_files(bus); if (parent) dev_info(parent, "PCI host bridge to bus %s ", name); else pr_info("PCI host bridge to bus %s ", name); |
ad5086108 PCI: Warn if no h... |
920 921 922 |
if (nr_node_ids > 1 && pcibus_to_node(bus) == NUMA_NO_NODE) dev_warn(&bus->dev, "Unknown NUMA node; performance will be reduced "); |
37d6a0a6f PCI: Add pci_regi... |
923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 |
/* Add initial resources to the bus */ resource_list_for_each_entry_safe(window, n, &resources) { list_move_tail(&window->node, &bridge->windows); offset = window->offset; res = window->res; if (res->flags & IORESOURCE_BUS) pci_bus_insert_busn_res(bus, bus->number, res->end); else pci_bus_add_resource(bus, res, 0); if (offset) { if (resource_type(res) == IORESOURCE_IO) fmt = " (bus address [%#06llx-%#06llx])"; else fmt = " (bus address [%#010llx-%#010llx])"; snprintf(addr, sizeof(addr), fmt, (unsigned long long)(res->start - offset), (unsigned long long)(res->end - offset)); } else addr[0] = '\0'; dev_info(&bus->dev, "root bus resource %pR%s ", res, addr); } down_write(&pci_bus_sem); list_add_tail(&bus->node, &pci_root_buses); up_write(&pci_bus_sem); return 0; unregister: put_device(&bridge->dev); |
9885440b1 PCI: Fix pci_host... |
958 |
device_del(&bridge->dev); |
37d6a0a6f PCI: Add pci_regi... |
959 960 961 962 963 |
free: kfree(bus); return err; } |
17e8f0d4c PCI: Check whethe... |
964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 |
static bool pci_bridge_child_ext_cfg_accessible(struct pci_dev *bridge) { int pos; u32 status; /* * If extended config space isn't accessible on a bridge's primary * bus, we certainly can't access it on the secondary bus. */ if (bridge->bus->bus_flags & PCI_BUS_FLAGS_NO_EXTCFG) return false; /* * PCIe Root Ports and switch ports are PCIe on both sides, so if * extended config space is accessible on the primary, it's also * accessible on the secondary. */ if (pci_is_pcie(bridge) && (pci_pcie_type(bridge) == PCI_EXP_TYPE_ROOT_PORT || pci_pcie_type(bridge) == PCI_EXP_TYPE_UPSTREAM || pci_pcie_type(bridge) == PCI_EXP_TYPE_DOWNSTREAM)) return true; /* * For the other bridge types: * - PCI-to-PCI bridges * - PCIe-to-PCI/PCI-X forward bridges * - PCI/PCI-X-to-PCIe reverse bridges * extended config space on the secondary side is only accessible * if the bridge supports PCI-X Mode 2. */ pos = pci_find_capability(bridge, PCI_CAP_ID_PCIX); if (!pos) return false; pci_read_config_dword(bridge, pos + PCI_X_STATUS, &status); return status & (PCI_X_STATUS_266MHZ | PCI_X_STATUS_533MHZ); } |
cbd4e055f PCI: pci_alloc_ch... |
1002 1003 |
static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent, struct pci_dev *bridge, int busnr) |
1da177e4c Linux-2.6.12-rc2 |
1004 1005 |
{ struct pci_bus *child; |
07e292950 PCI: Allow root a... |
1006 |
struct pci_host_bridge *host; |
1da177e4c Linux-2.6.12-rc2 |
1007 |
int i; |
4f535093c PCI: Put pci_dev ... |
1008 |
int ret; |
1da177e4c Linux-2.6.12-rc2 |
1009 |
|
3e466e2d3 PCI: Tidy up pci/... |
1010 |
/* Allocate a new bus and inherit stuff from the parent */ |
670ba0c88 PCI: Add generic ... |
1011 |
child = pci_alloc_bus(parent); |
1da177e4c Linux-2.6.12-rc2 |
1012 1013 |
if (!child) return NULL; |
1da177e4c Linux-2.6.12-rc2 |
1014 |
child->parent = parent; |
0cbdcfcf4 PCI: Introduce ne... |
1015 |
child->msi = parent->msi; |
1da177e4c Linux-2.6.12-rc2 |
1016 |
child->sysdata = parent->sysdata; |
6e325a62a [PATCH] PCI: make... |
1017 |
child->bus_flags = parent->bus_flags; |
1da177e4c Linux-2.6.12-rc2 |
1018 |
|
07e292950 PCI: Allow root a... |
1019 1020 1021 1022 1023 |
host = pci_find_host_bridge(parent); if (host->child_ops) child->ops = host->child_ops; else child->ops = parent->ops; |
3e466e2d3 PCI: Tidy up pci/... |
1024 1025 1026 |
/* * Initialize some portions of the bus device, but don't register * it now as the parent is not properly set up yet. |
fd7d1ced2 PCI: make pci_bus... |
1027 1028 |
*/ child->dev.class = &pcibus_class; |
1a9271331 PCI: struct devic... |
1029 |
dev_set_name(&child->dev, "%04x:%02x", pci_domain_nr(child), busnr); |
1da177e4c Linux-2.6.12-rc2 |
1030 |
|
3e466e2d3 PCI: Tidy up pci/... |
1031 |
/* Set up the primary, secondary and subordinate bus numbers */ |
b918c62e0 PCI: replace stru... |
1032 1033 1034 |
child->number = child->busn_res.start = busnr; child->primary = parent->busn_res.start; child->busn_res.end = 0xff; |
1da177e4c Linux-2.6.12-rc2 |
1035 |
|
4f535093c PCI: Put pci_dev ... |
1036 1037 1038 1039 |
if (!bridge) { child->dev.parent = parent->bridge; goto add_dev; } |
3789fa8a2 PCI: allow pci_al... |
1040 1041 1042 |
child->self = bridge; child->bridge = get_device(&bridge->dev); |
4f535093c PCI: Put pci_dev ... |
1043 |
child->dev.parent = child->bridge; |
98d9f30c8 pci/of: Match PCI... |
1044 |
pci_set_bus_of_node(child); |
9be60ca04 PCI: Add support ... |
1045 |
pci_set_bus_speed(child); |
17e8f0d4c PCI: Check whethe... |
1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 |
/* * Check whether extended config space is accessible on the child * bus. Note that we currently assume it is always accessible on * the root bus. */ if (!pci_bridge_child_ext_cfg_accessible(bridge)) { child->bus_flags |= PCI_BUS_FLAGS_NO_EXTCFG; pci_info(child, "extended config space not accessible "); } |
3e466e2d3 PCI: Tidy up pci/... |
1056 |
/* Set up default resource pointers and names */ |
fde09c6d8 PCI: define PCI r... |
1057 |
for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) { |
1da177e4c Linux-2.6.12-rc2 |
1058 1059 1060 1061 |
child->resource[i] = &bridge->resource[PCI_BRIDGE_RESOURCES+i]; child->resource[i]->name = child->name; } bridge->subordinate = child; |
4f535093c PCI: Put pci_dev ... |
1062 |
add_dev: |
44aa0c657 PCI/MSI: Add hook... |
1063 |
pci_set_bus_msi_domain(child); |
4f535093c PCI: Put pci_dev ... |
1064 1065 |
ret = device_register(&child->dev); WARN_ON(ret < 0); |
10a957475 PCI: Add pcibios ... |
1066 |
pcibios_add_bus(child); |
057bd2e05 PCI: Add pci_ops.... |
1067 1068 1069 1070 1071 1072 |
if (child->ops->add_bus) { ret = child->ops->add_bus(child); if (WARN_ON(ret < 0)) dev_err(&child->dev, "failed to add bus: %d ", ret); } |
4f535093c PCI: Put pci_dev ... |
1073 1074 |
/* Create legacy_io and legacy_mem files for this bus */ pci_create_legacy_files(child); |
1da177e4c Linux-2.6.12-rc2 |
1075 1076 |
return child; } |
3c78bc61f PCI: Whitespace c... |
1077 1078 |
struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr) |
1da177e4c Linux-2.6.12-rc2 |
1079 1080 1081 1082 |
{ struct pci_bus *child; child = pci_alloc_child_bus(parent, dev, busnr); |
e4ea9bb7e [PATCH] acpi brid... |
1083 |
if (child) { |
d71374daf [PATCH] PCI: fix ... |
1084 |
down_write(&pci_bus_sem); |
1da177e4c Linux-2.6.12-rc2 |
1085 |
list_add_tail(&child->node, &parent->children); |
d71374daf [PATCH] PCI: fix ... |
1086 |
up_write(&pci_bus_sem); |
e4ea9bb7e [PATCH] acpi brid... |
1087 |
} |
1da177e4c Linux-2.6.12-rc2 |
1088 1089 |
return child; } |
b7fe94342 PCI: Move EXPORT_... |
1090 |
EXPORT_SYMBOL(pci_add_new_bus); |
1da177e4c Linux-2.6.12-rc2 |
1091 |
|
f3dbd802b PCI: Enable CRS S... |
1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 |
static void pci_enable_crs(struct pci_dev *pdev) { u16 root_cap = 0; /* Enable CRS Software Visibility if supported */ pcie_capability_read_word(pdev, PCI_EXP_RTCAP, &root_cap); if (root_cap & PCI_EXP_RTCAP_CRSVIS) pcie_capability_set_word(pdev, PCI_EXP_RTCTL, PCI_EXP_RTCTL_CRSSVE); } |
1c02ea810 PCI: Distribute a... |
1102 1103 |
static unsigned int pci_scan_child_bus_extend(struct pci_bus *bus, unsigned int available_buses); |
2dbce5901 PCI: Assign bus n... |
1104 1105 1106 1107 1108 1109 1110 |
/** * pci_ea_fixed_busnrs() - Read fixed Secondary and Subordinate bus * numbers from EA capability. * @dev: Bridge * @sec: updated with secondary bus number from EA * @sub: updated with subordinate bus number from EA * |
73884a708 PCI: Do not use b... |
1111 1112 1113 |
* If @dev is a bridge with EA capability that specifies valid secondary * and subordinate bus numbers, return true with the bus numbers in @sec * and @sub. Otherwise return false. |
2dbce5901 PCI: Assign bus n... |
1114 1115 1116 1117 1118 |
*/ static bool pci_ea_fixed_busnrs(struct pci_dev *dev, u8 *sec, u8 *sub) { int ea, offset; u32 dw; |
73884a708 PCI: Do not use b... |
1119 |
u8 ea_sec, ea_sub; |
2dbce5901 PCI: Assign bus n... |
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 |
if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) return false; /* find PCI EA capability in list */ ea = pci_find_capability(dev, PCI_CAP_ID_EA); if (!ea) return false; offset = ea + PCI_EA_FIRST_ENT; pci_read_config_dword(dev, offset, &dw); |
73884a708 PCI: Do not use b... |
1131 1132 1133 1134 1135 1136 1137 |
ea_sec = dw & PCI_EA_SEC_BUS_MASK; ea_sub = (dw & PCI_EA_SUB_BUS_MASK) >> PCI_EA_SUB_BUS_SHIFT; if (ea_sec == 0 || ea_sub < ea_sec) return false; *sec = ea_sec; *sub = ea_sub; |
2dbce5901 PCI: Assign bus n... |
1138 1139 |
return true; } |
1c02ea810 PCI: Distribute a... |
1140 |
|
1da177e4c Linux-2.6.12-rc2 |
1141 |
/* |
1c02ea810 PCI: Distribute a... |
1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 |
* pci_scan_bridge_extend() - Scan buses behind a bridge * @bus: Parent bus the bridge is on * @dev: Bridge itself * @max: Starting subordinate number of buses behind this bridge * @available_buses: Total number of buses available for this bridge and * the devices below. After the minimal bus space has * been allocated the remaining buses will be * distributed equally between hotplug-capable bridges. * @pass: Either %0 (scan already configured bridges) or %1 (scan bridges * that need to be reconfigured. * |
1da177e4c Linux-2.6.12-rc2 |
1153 1154 1155 1156 1157 1158 1159 1160 |
* If it's a bridge, configure it and scan the bus behind it. * For CardBus bridges, we don't scan behind as the devices will * be handled by the bridge driver itself. * * We need to process bridges in two passes -- first we scan those * already configured by the BIOS and after we are done with all of * them, we proceed to assigning numbers to the remaining buses in * order to avoid overlaps between old and new bus numbers. |
70f7880d2 PCI: Improve pci_... |
1161 1162 |
* * Return: New subordinate number covering all buses behind this bridge. |
1da177e4c Linux-2.6.12-rc2 |
1163 |
*/ |
1c02ea810 PCI: Distribute a... |
1164 1165 1166 |
static int pci_scan_bridge_extend(struct pci_bus *bus, struct pci_dev *dev, int max, unsigned int available_buses, int pass) |
1da177e4c Linux-2.6.12-rc2 |
1167 1168 1169 |
{ struct pci_bus *child; int is_cardbus = (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS); |
498879417 [PATCH] PCI: use ... |
1170 |
u32 buses, i, j = 0; |
1da177e4c Linux-2.6.12-rc2 |
1171 |
u16 bctl; |
99ddd552f PCI: break out pr... |
1172 |
u8 primary, secondary, subordinate; |
a1c19894b PCI: Workaround i... |
1173 |
int broken = 0; |
2dbce5901 PCI: Assign bus n... |
1174 1175 1176 |
bool fixed_buses; u8 fixed_sec, fixed_sub; int next_busnr; |
1da177e4c Linux-2.6.12-rc2 |
1177 |
|
d963f6512 PCI: Power on bri... |
1178 1179 1180 1181 1182 |
/* * Make sure the bridge is powered on to be able to access config * space of devices below it. */ pm_runtime_get_sync(&dev->dev); |
1da177e4c Linux-2.6.12-rc2 |
1183 |
pci_read_config_dword(dev, PCI_PRIMARY_BUS, &buses); |
99ddd552f PCI: break out pr... |
1184 1185 1186 |
primary = buses & 0xFF; secondary = (buses >> 8) & 0xFF; subordinate = (buses >> 16) & 0xFF; |
1da177e4c Linux-2.6.12-rc2 |
1187 |
|
7506dc798 PCI: Add wrappers... |
1188 1189 |
pci_dbg(dev, "scanning [bus %02x-%02x] behind bridge, pass %d ", |
99ddd552f PCI: break out pr... |
1190 |
secondary, subordinate, pass); |
1da177e4c Linux-2.6.12-rc2 |
1191 |
|
71f6bd4a2 PCI: workaround h... |
1192 |
if (!primary && (primary != bus->number) && secondary && subordinate) { |
7506dc798 PCI: Add wrappers... |
1193 1194 |
pci_warn(dev, "Primary bus is hard wired to 0 "); |
71f6bd4a2 PCI: workaround h... |
1195 1196 |
primary = bus->number; } |
a1c19894b PCI: Workaround i... |
1197 1198 |
/* Check if setup is sensible at all */ if (!pass && |
1965f66e7 PCI: Check P2P br... |
1199 |
(primary != bus->number || secondary <= bus->number || |
12d870696 Revert "PCI: Make... |
1200 |
secondary > subordinate)) { |
7506dc798 PCI: Add wrappers... |
1201 1202 |
pci_info(dev, "bridge configuration invalid ([bus %02x-%02x]), reconfiguring ", |
1965f66e7 PCI: Check P2P br... |
1203 |
secondary, subordinate); |
a1c19894b PCI: Workaround i... |
1204 1205 |
broken = 1; } |
3e466e2d3 PCI: Tidy up pci/... |
1206 1207 1208 1209 |
/* * Disable Master-Abort Mode during probing to avoid reporting of * bus errors in some architectures. */ |
1da177e4c Linux-2.6.12-rc2 |
1210 1211 1212 |
pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &bctl); pci_write_config_word(dev, PCI_BRIDGE_CONTROL, bctl & ~PCI_BRIDGE_CTL_MASTER_ABORT); |
f3dbd802b PCI: Enable CRS S... |
1213 |
pci_enable_crs(dev); |
99ddd552f PCI: break out pr... |
1214 1215 1216 |
if ((secondary || subordinate) && !pcibios_assign_all_busses() && !is_cardbus && !broken) { unsigned int cmax; |
3e466e2d3 PCI: Tidy up pci/... |
1217 |
|
1da177e4c Linux-2.6.12-rc2 |
1218 |
/* |
3e466e2d3 PCI: Tidy up pci/... |
1219 1220 |
* Bus already configured by firmware, process it in the * first pass and just note the configuration. |
1da177e4c Linux-2.6.12-rc2 |
1221 1222 |
*/ if (pass) |
bbe8f9a3e [PATCH] PCI: Avoi... |
1223 |
goto out; |
1da177e4c Linux-2.6.12-rc2 |
1224 1225 |
/* |
3e466e2d3 PCI: Tidy up pci/... |
1226 1227 1228 1229 |
* The bus might already exist for two reasons: Either we * are rescanning the bus or the bus is reachable through * more than one bridge. The second case can happen with * the i450NX chipset. |
1da177e4c Linux-2.6.12-rc2 |
1230 |
*/ |
99ddd552f PCI: break out pr... |
1231 |
child = pci_find_bus(pci_domain_nr(bus), secondary); |
74710ded8 PCI: always scan ... |
1232 |
if (!child) { |
99ddd552f PCI: break out pr... |
1233 |
child = pci_add_new_bus(bus, dev, secondary); |
74710ded8 PCI: always scan ... |
1234 1235 |
if (!child) goto out; |
99ddd552f PCI: break out pr... |
1236 |
child->primary = primary; |
bc76b7310 PCI: insert busn_... |
1237 |
pci_bus_insert_busn_res(child, secondary, subordinate); |
74710ded8 PCI: always scan ... |
1238 |
child->bridge_ctl = bctl; |
1da177e4c Linux-2.6.12-rc2 |
1239 |
} |
1da177e4c Linux-2.6.12-rc2 |
1240 |
cmax = pci_scan_child_bus(child); |
c95b0bd6c PCI: Check for ch... |
1241 |
if (cmax > subordinate) |
7506dc798 PCI: Add wrappers... |
1242 1243 |
pci_warn(dev, "bridge has subordinate %02x but max busn %02x ", |
c95b0bd6c PCI: Check for ch... |
1244 |
subordinate, cmax); |
3e466e2d3 PCI: Tidy up pci/... |
1245 1246 |
/* Subordinate should equal child->busn_res.end */ |
c95b0bd6c PCI: Check for ch... |
1247 1248 |
if (subordinate > max) max = subordinate; |
1da177e4c Linux-2.6.12-rc2 |
1249 |
} else { |
3e466e2d3 PCI: Tidy up pci/... |
1250 |
|
1da177e4c Linux-2.6.12-rc2 |
1251 1252 1253 1254 |
/* * We need to assign a number to this bus which we always * do in the second pass. */ |
12f44f46b [PATCH] pci: fixu... |
1255 |
if (!pass) { |
619c8c310 PCI: Assign CardB... |
1256 |
if (pcibios_assign_all_busses() || broken || is_cardbus) |
3e466e2d3 PCI: Tidy up pci/... |
1257 1258 1259 1260 1261 1262 1263 1264 1265 |
/* * Temporarily disable forwarding of the * configuration cycles on all bridges in * this bus segment to avoid possible * conflicts in the second pass between two * bridges programmed with overlapping bus * ranges. */ |
12f44f46b [PATCH] pci: fixu... |
1266 1267 |
pci_write_config_dword(dev, PCI_PRIMARY_BUS, buses & ~0xffffff); |
bbe8f9a3e [PATCH] PCI: Avoi... |
1268 |
goto out; |
12f44f46b [PATCH] pci: fixu... |
1269 |
} |
1da177e4c Linux-2.6.12-rc2 |
1270 1271 1272 |
/* Clear errors */ pci_write_config_word(dev, PCI_STATUS, 0xffff); |
2dbce5901 PCI: Assign bus n... |
1273 1274 1275 1276 1277 1278 |
/* Read bus numbers from EA Capability (if present) */ fixed_buses = pci_ea_fixed_busnrs(dev, &fixed_sec, &fixed_sub); if (fixed_buses) next_busnr = fixed_sec; else next_busnr = max + 1; |
3e466e2d3 PCI: Tidy up pci/... |
1279 1280 1281 1282 1283 |
/* * Prevent assigning a bus number that already exists. * This can happen when a bridge is hot-plugged, so in this * case we only re-scan this bus. */ |
2dbce5901 PCI: Assign bus n... |
1284 |
child = pci_find_bus(pci_domain_nr(bus), next_busnr); |
b1a98b695 PCI: enumerate th... |
1285 |
if (!child) { |
2dbce5901 PCI: Assign bus n... |
1286 |
child = pci_add_new_bus(bus, dev, next_busnr); |
b1a98b695 PCI: enumerate th... |
1287 1288 |
if (!child) goto out; |
2dbce5901 PCI: Assign bus n... |
1289 |
pci_bus_insert_busn_res(child, next_busnr, |
a20c7f36b PCI: Do not alloc... |
1290 |
bus->busn_res.end); |
b1a98b695 PCI: enumerate th... |
1291 |
} |
9a4d7d871 PCI: Increment ma... |
1292 |
max++; |
1c02ea810 PCI: Distribute a... |
1293 1294 |
if (available_buses) available_buses--; |
1da177e4c Linux-2.6.12-rc2 |
1295 1296 |
buses = (buses & 0xff000000) | ((unsigned int)(child->primary) << 0) |
b918c62e0 PCI: replace stru... |
1297 1298 |
| ((unsigned int)(child->busn_res.start) << 8) | ((unsigned int)(child->busn_res.end) << 16); |
1da177e4c Linux-2.6.12-rc2 |
1299 1300 1301 1302 1303 1304 1305 1306 1307 |
/* * yenta.c forces a secondary latency timer of 176. * Copy that behaviour here. */ if (is_cardbus) { buses &= ~0xff000000; buses |= CARDBUS_LATENCY_TIMER << 24; } |
7c867c889 PCI: Avoid potent... |
1308 |
|
3e466e2d3 PCI: Tidy up pci/... |
1309 |
/* We need to blast all three values with a single write */ |
1da177e4c Linux-2.6.12-rc2 |
1310 1311 1312 |
pci_write_config_dword(dev, PCI_PRIMARY_BUS, buses); if (!is_cardbus) { |
11949255d PCI: modify PCI b... |
1313 |
child->bridge_ctl = bctl; |
1c02ea810 PCI: Distribute a... |
1314 |
max = pci_scan_child_bus_extend(child, available_buses); |
1da177e4c Linux-2.6.12-rc2 |
1315 |
} else { |
3e466e2d3 PCI: Tidy up pci/... |
1316 |
|
1da177e4c Linux-2.6.12-rc2 |
1317 |
/* |
3e466e2d3 PCI: Tidy up pci/... |
1318 1319 1320 |
* For CardBus bridges, we leave 4 bus numbers as * cards with a PCI-to-PCI bridge can be inserted * later. |
1da177e4c Linux-2.6.12-rc2 |
1321 |
*/ |
3c78bc61f PCI: Whitespace c... |
1322 |
for (i = 0; i < CARDBUS_RESERVE_BUSNR; i++) { |
498879417 [PATCH] PCI: use ... |
1323 |
struct pci_bus *parent = bus; |
cc57450f5 [PATCH] acpi brid... |
1324 1325 1326 |
if (pci_find_bus(pci_domain_nr(bus), max+i+1)) break; |
498879417 [PATCH] PCI: use ... |
1327 1328 |
while (parent->parent) { if ((!pcibios_assign_all_busses()) && |
b918c62e0 PCI: replace stru... |
1329 1330 |
(parent->busn_res.end > max) && (parent->busn_res.end <= max+i)) { |
498879417 [PATCH] PCI: use ... |
1331 1332 1333 1334 1335 |
j = 1; } parent = parent->parent; } if (j) { |
3e466e2d3 PCI: Tidy up pci/... |
1336 |
|
498879417 [PATCH] PCI: use ... |
1337 |
/* |
3e466e2d3 PCI: Tidy up pci/... |
1338 1339 1340 |
* Often, there are two CardBus * bridges -- try to leave one * valid bus number for each one. |
498879417 [PATCH] PCI: use ... |
1341 1342 1343 1344 1345 |
*/ i /= 2; break; } } |
cc57450f5 [PATCH] acpi brid... |
1346 |
max += i; |
1da177e4c Linux-2.6.12-rc2 |
1347 |
} |
3e466e2d3 PCI: Tidy up pci/... |
1348 |
|
2dbce5901 PCI: Assign bus n... |
1349 1350 1351 1352 1353 1354 1355 |
/* * Set subordinate bus number to its real value. * If fixed subordinate bus number exists from EA * capability then use it. */ if (fixed_buses) max = fixed_sub; |
bc76b7310 PCI: insert busn_... |
1356 |
pci_bus_update_busn_res_end(child, max); |
1da177e4c Linux-2.6.12-rc2 |
1357 1358 |
pci_write_config_byte(dev, PCI_SUBORDINATE_BUS, max); } |
cb3576fa3 PCI: Include PCI ... |
1359 1360 1361 |
sprintf(child->name, (is_cardbus ? "PCI CardBus %04x:%02x" : "PCI Bus %04x:%02x"), pci_domain_nr(bus), child->number); |
1da177e4c Linux-2.6.12-rc2 |
1362 |
|
e412d63d6 PCI: Improve "par... |
1363 |
/* Check that all devices are accessible */ |
498879417 [PATCH] PCI: use ... |
1364 |
while (bus->parent) { |
b918c62e0 PCI: replace stru... |
1365 1366 |
if ((child->busn_res.end > bus->busn_res.end) || (child->number > bus->busn_res.end) || |
498879417 [PATCH] PCI: use ... |
1367 |
(child->number < bus->number) || |
b918c62e0 PCI: replace stru... |
1368 |
(child->busn_res.end < bus->number)) { |
e412d63d6 PCI: Improve "par... |
1369 1370 1371 1372 |
dev_info(&dev->dev, "devices behind bridge are unusable because %pR cannot be assigned for them ", &child->busn_res); break; |
498879417 [PATCH] PCI: use ... |
1373 1374 1375 |
} bus = bus->parent; } |
bbe8f9a3e [PATCH] PCI: Avoi... |
1376 1377 |
out: pci_write_config_word(dev, PCI_BRIDGE_CONTROL, bctl); |
d963f6512 PCI: Power on bri... |
1378 |
pm_runtime_put(&dev->dev); |
1da177e4c Linux-2.6.12-rc2 |
1379 1380 |
return max; } |
1c02ea810 PCI: Distribute a... |
1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 |
/* * pci_scan_bridge() - Scan buses behind a bridge * @bus: Parent bus the bridge is on * @dev: Bridge itself * @max: Starting subordinate number of buses behind this bridge * @pass: Either %0 (scan already configured bridges) or %1 (scan bridges * that need to be reconfigured. * * If it's a bridge, configure it and scan the bus behind it. * For CardBus bridges, we don't scan behind as the devices will * be handled by the bridge driver itself. * * We need to process bridges in two passes -- first we scan those * already configured by the BIOS and after we are done with all of * them, we proceed to assigning numbers to the remaining buses in * order to avoid overlaps between old and new bus numbers. |
70f7880d2 PCI: Improve pci_... |
1398 1399 |
* * Return: New subordinate number covering all buses behind this bridge. |
1c02ea810 PCI: Distribute a... |
1400 1401 1402 1403 1404 |
*/ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass) { return pci_scan_bridge_extend(bus, dev, max, 0, pass); } |
b7fe94342 PCI: Move EXPORT_... |
1405 |
EXPORT_SYMBOL(pci_scan_bridge); |
1da177e4c Linux-2.6.12-rc2 |
1406 1407 1408 1409 1410 1411 1412 1413 |
/* * Read interrupt line and base address registers. * The architecture-dependent code can tweak these, of course. */ static void pci_read_irq(struct pci_dev *dev) { unsigned char irq; |
be20f6b06 PCI/IOV: Skip INT... |
1414 1415 1416 1417 1418 1419 |
/* VFs are not allowed to use INTx, so skip the config reads */ if (dev->is_virtfn) { dev->pin = 0; dev->irq = 0; return; } |
1da177e4c Linux-2.6.12-rc2 |
1420 |
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &irq); |
ffeff788d [PATCH] pci: stor... |
1421 |
dev->pin = irq; |
1da177e4c Linux-2.6.12-rc2 |
1422 1423 1424 1425 |
if (irq) pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq); dev->irq = irq; } |
bb209c828 powerpc/pci: Add ... |
1426 |
void set_pcie_port_type(struct pci_dev *pdev) |
480b93b78 PCI: centralize d... |
1427 1428 1429 |
{ int pos; u16 reg16; |
d0751b98d PCI: Add dev->has... |
1430 1431 |
int type; struct pci_dev *parent; |
480b93b78 PCI: centralize d... |
1432 1433 1434 1435 |
pos = pci_find_capability(pdev, PCI_CAP_ID_EXP); if (!pos) return; |
51ebfc92b PCI: Enumerate sw... |
1436 |
|
0efea0006 PCI: cache PCIe c... |
1437 |
pdev->pcie_cap = pos; |
480b93b78 PCI: centralize d... |
1438 |
pci_read_config_word(pdev, pos + PCI_EXP_FLAGS, ®16); |
786e22885 PCI: Add pcie_fla... |
1439 |
pdev->pcie_flags_reg = reg16; |
b03e7495a PCI: Set PCI-E Ma... |
1440 1441 |
pci_read_config_word(pdev, pos + PCI_EXP_DEVCAP, ®16); pdev->pcie_mpss = reg16 & PCI_EXP_DEVCAP_PAYLOAD; |
d0751b98d PCI: Add dev->has... |
1442 |
|
ca7841040 PCI: Get rid of d... |
1443 1444 1445 |
parent = pci_upstream_bridge(pdev); if (!parent) return; |
d0751b98d PCI: Add dev->has... |
1446 |
/* |
ca7841040 PCI: Get rid of d... |
1447 1448 1449 |
* Some systems do not identify their upstream/downstream ports * correctly so detect impossible configurations here and correct * the port type accordingly. |
d0751b98d PCI: Add dev->has... |
1450 1451 |
*/ type = pci_pcie_type(pdev); |
ca7841040 PCI: Get rid of d... |
1452 |
if (type == PCI_EXP_TYPE_DOWNSTREAM) { |
b35b1df5e PCI: Tolerate hie... |
1453 |
/* |
ca7841040 PCI: Get rid of d... |
1454 1455 1456 |
* If pdev claims to be downstream port but the parent * device is also downstream port assume pdev is actually * upstream port. |
b35b1df5e PCI: Tolerate hie... |
1457 |
*/ |
ca7841040 PCI: Get rid of d... |
1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 |
if (pcie_downstream_port(parent)) { pci_info(pdev, "claims to be downstream port but is acting as upstream port, correcting type "); pdev->pcie_flags_reg &= ~PCI_EXP_FLAGS_TYPE; pdev->pcie_flags_reg |= PCI_EXP_TYPE_UPSTREAM; } } else if (type == PCI_EXP_TYPE_UPSTREAM) { /* * If pdev claims to be upstream port but the parent * device is also upstream port assume pdev is actually * downstream port. */ if (pci_pcie_type(parent) == PCI_EXP_TYPE_UPSTREAM) { pci_info(pdev, "claims to be upstream port but is acting as downstream port, correcting type "); pdev->pcie_flags_reg &= ~PCI_EXP_FLAGS_TYPE; pdev->pcie_flags_reg |= PCI_EXP_TYPE_DOWNSTREAM; } |
d0751b98d PCI: Add dev->has... |
1476 |
} |
480b93b78 PCI: centralize d... |
1477 |
} |
bb209c828 powerpc/pci: Add ... |
1478 |
void set_pcie_hotplug_bridge(struct pci_dev *pdev) |
28760489a PCI: pcie: Ensure... |
1479 |
{ |
28760489a PCI: pcie: Ensure... |
1480 |
u32 reg32; |
59875ae48 PCI/core: Use PCI... |
1481 |
pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP, ®32); |
28760489a PCI: pcie: Ensure... |
1482 1483 1484 |
if (reg32 & PCI_EXP_SLTCAP_HPC) pdev->is_hotplug_bridge = 1; } |
8531e283b PCI: Recognize Th... |
1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 |
static void set_pcie_thunderbolt(struct pci_dev *dev) { int vsec = 0; u32 header; while ((vsec = pci_find_next_ext_capability(dev, vsec, PCI_EXT_CAP_ID_VNDR))) { pci_read_config_dword(dev, vsec + PCI_VNDR_HEADER, &header); /* Is the device part of a Thunderbolt controller? */ if (dev->vendor == PCI_VENDOR_ID_INTEL && PCI_VNDR_HEADER_ID(header) == PCI_VSEC_ID_INTEL_TBT) { dev->is_thunderbolt = 1; return; } } } |
617654aae PCI / ACPI: Ident... |
1502 1503 1504 1505 1506 1507 1508 1509 1510 |
static void set_pcie_untrusted(struct pci_dev *dev) { struct pci_dev *parent; /* * If the upstream bridge is untrusted we treat this device * untrusted as well. */ parent = pci_upstream_bridge(dev); |
99b50be9d PCI: Treat "exter... |
1511 |
if (parent && (parent->untrusted || parent->external_facing)) |
617654aae PCI / ACPI: Ident... |
1512 1513 |
dev->untrusted = true; } |
0b950f0f3 PCI: Make local f... |
1514 |
/** |
3e466e2d3 PCI: Tidy up pci/... |
1515 |
* pci_ext_cfg_is_aliased - Is ext config space just an alias of std config? |
78916b00f PCI: Test for std... |
1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 |
* @dev: PCI device * * PCI Express to PCI/PCI-X Bridge Specification, rev 1.0, 4.1.4 says that * when forwarding a type1 configuration request the bridge must check that * the extended register address field is zero. The bridge is not permitted * to forward the transactions and must handle it as an Unsupported Request. * Some bridges do not follow this rule and simply drop the extended register * bits, resulting in the standard config space being aliased, every 256 * bytes across the entire configuration space. Test for this condition by * comparing the first dword of each potential alias to the vendor/device ID. * Known offenders: * ASM1083/1085 PCIe-to-PCI Reversible Bridge (1b21:1080, rev 01 & 03) * AMD/ATI SBx00 PCI to PCI Bridge (1002:4384, rev 40) */ static bool pci_ext_cfg_is_aliased(struct pci_dev *dev) { #ifdef CONFIG_PCI_QUIRKS int pos; u32 header, tmp; pci_read_config_dword(dev, PCI_VENDOR_ID, &header); for (pos = PCI_CFG_SPACE_SIZE; pos < PCI_CFG_SPACE_EXP_SIZE; pos += PCI_CFG_SPACE_SIZE) { if (pci_read_config_dword(dev, pos, &tmp) != PCIBIOS_SUCCESSFUL || header != tmp) return false; } return true; #else return false; #endif } /** |
3e466e2d3 PCI: Tidy up pci/... |
1552 |
* pci_cfg_space_size - Get the configuration space size of the PCI device |
0b950f0f3 PCI: Make local f... |
1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 |
* @dev: PCI device * * Regular PCI devices have 256 bytes, but PCI-X 2 and PCI Express devices * have 4096 bytes. Even if the device is capable, that doesn't mean we can * access it. Maybe we don't have a way to generate extended config space * accesses, or the device is behind a reverse Express bridge. So we try * reading the dword at 0x100 which must either be 0 or a valid extended * capability header. */ static int pci_cfg_space_size_ext(struct pci_dev *dev) { u32 status; int pos = PCI_CFG_SPACE_SIZE; if (pci_read_config_dword(dev, pos, &status) != PCIBIOS_SUCCESSFUL) |
8e5a395a0 PCI: Simplify con... |
1568 |
return PCI_CFG_SPACE_SIZE; |
78916b00f PCI: Test for std... |
1569 |
if (status == 0xffffffff || pci_ext_cfg_is_aliased(dev)) |
8e5a395a0 PCI: Simplify con... |
1570 |
return PCI_CFG_SPACE_SIZE; |
0b950f0f3 PCI: Make local f... |
1571 1572 |
return PCI_CFG_SPACE_EXP_SIZE; |
0b950f0f3 PCI: Make local f... |
1573 1574 1575 1576 1577 1578 1579 |
} int pci_cfg_space_size(struct pci_dev *dev) { int pos; u32 status; u16 class; |
975bb8b4d PCI/IOV: Use VF0 ... |
1580 |
#ifdef CONFIG_PCI_IOV |
06013b647 PCI/IOV: Assume S... |
1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 |
/* * Per the SR-IOV specification (rev 1.1, sec 3.5), VFs are required to * implement a PCIe capability and therefore must implement extended * config space. We can skip the NO_EXTCFG test below and the * reachability/aliasing test in pci_cfg_space_size_ext() by virtue of * the fact that the SR-IOV capability on the PF resides in extended * config space and must be accessible and non-aliased to have enabled * support for this VF. This is a micro performance optimization for * systems supporting many VFs. */ if (dev->is_virtfn) return PCI_CFG_SPACE_EXP_SIZE; |
975bb8b4d PCI/IOV: Use VF0 ... |
1593 |
#endif |
17e8f0d4c PCI: Check whethe... |
1594 1595 |
if (dev->bus->bus_flags & PCI_BUS_FLAGS_NO_EXTCFG) return PCI_CFG_SPACE_SIZE; |
0b950f0f3 PCI: Make local f... |
1596 1597 1598 |
class = dev->class >> 8; if (class == PCI_CLASS_BRIDGE_HOST) return pci_cfg_space_size_ext(dev); |
8e5a395a0 PCI: Simplify con... |
1599 1600 |
if (pci_is_pcie(dev)) return pci_cfg_space_size_ext(dev); |
0b950f0f3 PCI: Make local f... |
1601 |
|
8e5a395a0 PCI: Simplify con... |
1602 1603 1604 |
pos = pci_find_capability(dev, PCI_CAP_ID_PCIX); if (!pos) return PCI_CFG_SPACE_SIZE; |
0b950f0f3 PCI: Make local f... |
1605 |
|
8e5a395a0 PCI: Simplify con... |
1606 1607 1608 |
pci_read_config_dword(dev, pos + PCI_X_STATUS, &status); if (status & (PCI_X_STATUS_266MHZ | PCI_X_STATUS_533MHZ)) return pci_cfg_space_size_ext(dev); |
0b950f0f3 PCI: Make local f... |
1609 |
|
0b950f0f3 PCI: Make local f... |
1610 1611 |
return PCI_CFG_SPACE_SIZE; } |
cf0921bea PCI/IOV: Use VF0 ... |
1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 |
static u32 pci_class(struct pci_dev *dev) { u32 class; #ifdef CONFIG_PCI_IOV if (dev->is_virtfn) return dev->physfn->sriov->class; #endif pci_read_config_dword(dev, PCI_CLASS_REVISION, &class); return class; } static void pci_subsystem_ids(struct pci_dev *dev, u16 *vendor, u16 *device) { #ifdef CONFIG_PCI_IOV if (dev->is_virtfn) { *vendor = dev->physfn->sriov->subsystem_vendor; *device = dev->physfn->sriov->subsystem_device; return; } #endif pci_read_config_word(dev, PCI_SUBSYSTEM_VENDOR_ID, vendor); pci_read_config_word(dev, PCI_SUBSYSTEM_ID, device); } static u8 pci_hdr_type(struct pci_dev *dev) { u8 hdr_type; #ifdef CONFIG_PCI_IOV if (dev->is_virtfn) return dev->physfn->sriov->hdr_type; #endif pci_read_config_byte(dev, PCI_HEADER_TYPE, &hdr_type); return hdr_type; } |
01abc2aa0 Revert "adjust le... |
1648 |
#define LEGACY_IO_RESOURCE (IORESOURCE_IO | IORESOURCE_PCI_FIXED) |
76e6a1d66 [PATCH] pci/probe... |
1649 |
|
e80e7edc5 PCI/MSI: Initiali... |
1650 |
static void pci_msi_setup_pci_dev(struct pci_dev *dev) |
1851617cd PCI/MSI: Disable ... |
1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 |
{ /* * Disable the MSI hardware to avoid screaming interrupts * during boot. This is the power on reset default so * usually this should be a noop. */ dev->msi_cap = pci_find_capability(dev, PCI_CAP_ID_MSI); if (dev->msi_cap) pci_msi_set_enable(dev, 0); dev->msix_cap = pci_find_capability(dev, PCI_CAP_ID_MSIX); if (dev->msix_cap) pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_ENABLE, 0); } |
1da177e4c Linux-2.6.12-rc2 |
1665 |
/** |
3e466e2d3 PCI: Tidy up pci/... |
1666 |
* pci_intx_mask_broken - Test PCI_COMMAND_INTX_DISABLE writability |
99b3c58f7 PCI: Test INTx ma... |
1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 |
* @dev: PCI device * * Test whether PCI_COMMAND_INTX_DISABLE is writable for @dev. Check this * at enumeration-time to avoid modifying PCI_COMMAND at run-time. */ static int pci_intx_mask_broken(struct pci_dev *dev) { u16 orig, toggle, new; pci_read_config_word(dev, PCI_COMMAND, &orig); toggle = orig ^ PCI_COMMAND_INTX_DISABLE; pci_write_config_word(dev, PCI_COMMAND, toggle); pci_read_config_word(dev, PCI_COMMAND, &new); pci_write_config_word(dev, PCI_COMMAND, orig); /* * PCI_COMMAND_INTX_DISABLE was reserved and read-only prior to PCI * r2.3, so strictly speaking, a device is not *broken* if it's not * writable. But we'll live with the misnomer for now. */ if (new != toggle) return 1; return 0; } |
11eb0e0e8 PCI: Make early d... |
1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 |
static void early_dump_pci_device(struct pci_dev *pdev) { u32 value[256 / 4]; int i; pci_info(pdev, "config space: "); for (i = 0; i < 256; i += 4) pci_read_config_dword(pdev, i, &value[i / 4]); print_hex_dump(KERN_INFO, "", DUMP_PREFIX_OFFSET, 16, 1, value, 256, false); } |
99b3c58f7 PCI: Test INTx ma... |
1706 |
/** |
3e466e2d3 PCI: Tidy up pci/... |
1707 |
* pci_setup_device - Fill in class and map information of a device |
1da177e4c Linux-2.6.12-rc2 |
1708 1709 |
* @dev: the device structure to fill * |
f7625980f PCI: Fix whitespa... |
1710 |
* Initialize the device structure with information about the device's |
3e466e2d3 PCI: Tidy up pci/... |
1711 |
* vendor,class,memory and IO-space addresses, IRQ lines etc. |
1da177e4c Linux-2.6.12-rc2 |
1712 |
* Called at initialisation of the PCI subsystem and by CardBus services. |
480b93b78 PCI: centralize d... |
1713 1714 |
* Returns 0 on success and negative if unknown type of device (not normal, * bridge or CardBus). |
1da177e4c Linux-2.6.12-rc2 |
1715 |
*/ |
480b93b78 PCI: centralize d... |
1716 |
int pci_setup_device(struct pci_dev *dev) |
1da177e4c Linux-2.6.12-rc2 |
1717 1718 |
{ u32 class; |
b84106b4e PCI: Disable IO/M... |
1719 |
u16 cmd; |
480b93b78 PCI: centralize d... |
1720 |
u8 hdr_type; |
bc577d2bb PCI: populate sub... |
1721 |
int pos = 0; |
5bfa14ed9 PCI: convert bus ... |
1722 1723 |
struct pci_bus_region region; struct resource *res; |
480b93b78 PCI: centralize d... |
1724 |
|
cf0921bea PCI/IOV: Use VF0 ... |
1725 |
hdr_type = pci_hdr_type(dev); |
480b93b78 PCI: centralize d... |
1726 1727 1728 1729 1730 1731 |
dev->sysdata = dev->bus->sysdata; dev->dev.parent = dev->bus->bridge; dev->dev.bus = &pci_bus_type; dev->hdr_type = hdr_type & 0x7f; dev->multifunction = !!(hdr_type & 0x80); |
480b93b78 PCI: centralize d... |
1732 1733 |
dev->error_state = pci_channel_io_normal; set_pcie_port_type(dev); |
017ffe64e PCI: Hold pci_slo... |
1734 |
pci_dev_assign_slot(dev); |
3e466e2d3 PCI: Tidy up pci/... |
1735 1736 1737 1738 1739 |
/* * Assume 32-bit PCI; let 64-bit PCI cards (which are far rarer) * set this higher, assuming the system even supports it. */ |
480b93b78 PCI: centralize d... |
1740 |
dev->dma_mask = 0xffffffff; |
1da177e4c Linux-2.6.12-rc2 |
1741 |
|
eebfcfb52 PCI: handle pci_n... |
1742 1743 1744 |
dev_set_name(&dev->dev, "%04x:%02x:%02x.%d", pci_domain_nr(dev->bus), dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)); |
1da177e4c Linux-2.6.12-rc2 |
1745 |
|
cf0921bea PCI/IOV: Use VF0 ... |
1746 |
class = pci_class(dev); |
b8a3a5214 PCI: read revisio... |
1747 |
dev->revision = class & 0xff; |
2dd8ba921 PCI: Fix device c... |
1748 |
dev->class = class >> 8; /* upper 3 bytes */ |
1da177e4c Linux-2.6.12-rc2 |
1749 |
|
11eb0e0e8 PCI: Make early d... |
1750 1751 |
if (pci_early_dump) early_dump_pci_device(dev); |
3e466e2d3 PCI: Tidy up pci/... |
1752 |
/* Need to have dev->class ready */ |
853346e43 PCI: fix conflict... |
1753 |
dev->cfg_size = pci_cfg_space_size(dev); |
3e466e2d3 PCI: Tidy up pci/... |
1754 |
/* Need to have dev->cfg_size ready */ |
8531e283b PCI: Recognize Th... |
1755 |
set_pcie_thunderbolt(dev); |
617654aae PCI / ACPI: Ident... |
1756 |
set_pcie_untrusted(dev); |
1da177e4c Linux-2.6.12-rc2 |
1757 |
/* "Unknown power state" */ |
3fe9d19f9 [PATCH] PCI: Supp... |
1758 |
dev->current_state = PCI_UNKNOWN; |
1da177e4c Linux-2.6.12-rc2 |
1759 1760 1761 |
/* Early fixups, before probing the BARs */ pci_fixup_device(pci_fixup_early, dev); |
3e466e2d3 PCI: Tidy up pci/... |
1762 |
|
b7360f609 PCI: Announce dev... |
1763 1764 1765 |
pci_info(dev, "[%04x:%04x] type %02x class %#08x ", dev->vendor, dev->device, dev->hdr_type, dev->class); |
3e466e2d3 PCI: Tidy up pci/... |
1766 |
/* Device class may be changed after fixup */ |
f79b1b146 PCI: use fixed-up... |
1767 |
class = dev->class >> 8; |
1da177e4c Linux-2.6.12-rc2 |
1768 |
|
b6caa1d8c PCI: Don't disabl... |
1769 |
if (dev->non_compliant_bars && !dev->mmio_always_on) { |
b84106b4e PCI: Disable IO/M... |
1770 1771 |
pci_read_config_word(dev, PCI_COMMAND, &cmd); if (cmd & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) { |
7506dc798 PCI: Add wrappers... |
1772 1773 |
pci_info(dev, "device has non-compliant BARs; disabling IO/MEM decoding "); |
b84106b4e PCI: Disable IO/M... |
1774 1775 1776 1777 1778 |
cmd &= ~PCI_COMMAND_IO; cmd &= ~PCI_COMMAND_MEMORY; pci_write_config_word(dev, PCI_COMMAND, cmd); } } |
99b3c58f7 PCI: Test INTx ma... |
1779 |
dev->broken_intx_masking = pci_intx_mask_broken(dev); |
1da177e4c Linux-2.6.12-rc2 |
1780 1781 1782 1783 1784 1785 |
switch (dev->hdr_type) { /* header type */ case PCI_HEADER_TYPE_NORMAL: /* standard header */ if (class == PCI_CLASS_BRIDGE_PCI) goto bad; pci_read_irq(dev); pci_read_bases(dev, 6, PCI_ROM_ADDRESS); |
cf0921bea PCI/IOV: Use VF0 ... |
1786 1787 |
pci_subsystem_ids(dev, &dev->subsystem_vendor, &dev->subsystem_device); |
368c73d4f PCI: quirks: fix ... |
1788 1789 |
/* |
075eb9e35 PCI: Log IDE reso... |
1790 1791 1792 1793 |
* Do the ugly legacy mode stuff here rather than broken chip * quirk code. Legacy mode ATA controllers have fixed * addresses. These are not always echoed in BAR0-3, and * BAR0-3 in a few cases contain junk! |
368c73d4f PCI: quirks: fix ... |
1794 1795 1796 1797 1798 |
*/ if (class == PCI_CLASS_STORAGE_IDE) { u8 progif; pci_read_config_byte(dev, PCI_CLASS_PROG, &progif); if ((progif & 1) == 0) { |
5bfa14ed9 PCI: convert bus ... |
1799 1800 1801 1802 |
region.start = 0x1F0; region.end = 0x1F7; res = &dev->resource[0]; res->flags = LEGACY_IO_RESOURCE; |
fc2798502 PCI: Convert pcib... |
1803 |
pcibios_bus_to_resource(dev->bus, res, ®ion); |
7506dc798 PCI: Add wrappers... |
1804 1805 |
pci_info(dev, "legacy IDE quirk: reg 0x10: %pR ", |
075eb9e35 PCI: Log IDE reso... |
1806 |
res); |
5bfa14ed9 PCI: convert bus ... |
1807 1808 1809 1810 |
region.start = 0x3F6; region.end = 0x3F6; res = &dev->resource[1]; res->flags = LEGACY_IO_RESOURCE; |
fc2798502 PCI: Convert pcib... |
1811 |
pcibios_bus_to_resource(dev->bus, res, ®ion); |
7506dc798 PCI: Add wrappers... |
1812 1813 |
pci_info(dev, "legacy IDE quirk: reg 0x14: %pR ", |
075eb9e35 PCI: Log IDE reso... |
1814 |
res); |
368c73d4f PCI: quirks: fix ... |
1815 1816 |
} if ((progif & 4) == 0) { |
5bfa14ed9 PCI: convert bus ... |
1817 1818 1819 1820 |
region.start = 0x170; region.end = 0x177; res = &dev->resource[2]; res->flags = LEGACY_IO_RESOURCE; |
fc2798502 PCI: Convert pcib... |
1821 |
pcibios_bus_to_resource(dev->bus, res, ®ion); |
7506dc798 PCI: Add wrappers... |
1822 1823 |
pci_info(dev, "legacy IDE quirk: reg 0x18: %pR ", |
075eb9e35 PCI: Log IDE reso... |
1824 |
res); |
5bfa14ed9 PCI: convert bus ... |
1825 1826 1827 1828 |
region.start = 0x376; region.end = 0x376; res = &dev->resource[3]; res->flags = LEGACY_IO_RESOURCE; |
fc2798502 PCI: Convert pcib... |
1829 |
pcibios_bus_to_resource(dev->bus, res, ®ion); |
7506dc798 PCI: Add wrappers... |
1830 1831 |
pci_info(dev, "legacy IDE quirk: reg 0x1c: %pR ", |
075eb9e35 PCI: Log IDE reso... |
1832 |
res); |
368c73d4f PCI: quirks: fix ... |
1833 1834 |
} } |
1da177e4c Linux-2.6.12-rc2 |
1835 1836 1837 |
break; case PCI_HEADER_TYPE_BRIDGE: /* bridge header */ |
3e466e2d3 PCI: Tidy up pci/... |
1838 1839 1840 1841 1842 |
/* * The PCI-to-PCI bridge spec requires that subtractive * decoding (i.e. transparent) bridge must have programming * interface code of 0x01. */ |
3efd273b4 [PATCH] pci: call... |
1843 |
pci_read_irq(dev); |
1da177e4c Linux-2.6.12-rc2 |
1844 1845 |
dev->transparent = ((dev->class & 0xff) == 1); pci_read_bases(dev, 2, PCI_ROM_ADDRESS1); |
51c48b310 PCI: Probe bridge... |
1846 |
pci_read_bridge_windows(dev); |
28760489a PCI: pcie: Ensure... |
1847 |
set_pcie_hotplug_bridge(dev); |
bc577d2bb PCI: populate sub... |
1848 1849 1850 1851 1852 |
pos = pci_find_capability(dev, PCI_CAP_ID_SSVID); if (pos) { pci_read_config_word(dev, pos + PCI_SSVID_VENDOR_ID, &dev->subsystem_vendor); pci_read_config_word(dev, pos + PCI_SSVID_DEVICE_ID, &dev->subsystem_device); } |
1da177e4c Linux-2.6.12-rc2 |
1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 |
break; case PCI_HEADER_TYPE_CARDBUS: /* CardBus bridge header */ if (class != PCI_CLASS_BRIDGE_CARDBUS) goto bad; pci_read_irq(dev); pci_read_bases(dev, 1, 0); pci_read_config_word(dev, PCI_CB_SUBSYSTEM_VENDOR_ID, &dev->subsystem_vendor); pci_read_config_word(dev, PCI_CB_SUBSYSTEM_ID, &dev->subsystem_device); break; default: /* unknown header */ |
7506dc798 PCI: Add wrappers... |
1865 1866 |
pci_err(dev, "unknown header type %02x, ignoring device ", |
227f06470 PCI: Merge multi-... |
1867 |
dev->hdr_type); |
480b93b78 PCI: centralize d... |
1868 |
return -EIO; |
1da177e4c Linux-2.6.12-rc2 |
1869 1870 |
bad: |
7506dc798 PCI: Add wrappers... |
1871 1872 |
pci_err(dev, "ignoring class %#08x (doesn't match header type %02x) ", |
227f06470 PCI: Merge multi-... |
1873 |
dev->class, dev->hdr_type); |
2b4aed1d1 PCI: Shift PCI_CL... |
1874 |
dev->class = PCI_CLASS_NOT_DEFINED << 8; |
1da177e4c Linux-2.6.12-rc2 |
1875 1876 1877 1878 1879 |
} /* We found a fine healthy device, go go go... */ return 0; } |
9dae3a972 PCI: Move MPS con... |
1880 1881 1882 |
static void pci_configure_mps(struct pci_dev *dev) { struct pci_dev *bridge = pci_upstream_bridge(dev); |
9f0e89359 PCI: Match Root P... |
1883 |
int mps, mpss, p_mps, rc; |
9dae3a972 PCI: Move MPS con... |
1884 |
|
aa0ce96d7 PCI: Program MPS ... |
1885 |
if (!pci_is_pcie(dev)) |
9dae3a972 PCI: Move MPS con... |
1886 |
return; |
3dbe97efe PCI: Skip MPS log... |
1887 1888 1889 |
/* MPS and MRRS fields are of type 'RsvdP' for VFs, short-circuit out */ if (dev->is_virtfn) return; |
aa0ce96d7 PCI: Program MPS ... |
1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 |
/* * For Root Complex Integrated Endpoints, program the maximum * supported value unless limited by the PCIE_BUS_PEER2PEER case. */ if (pci_pcie_type(dev) == PCI_EXP_TYPE_RC_END) { if (pcie_bus_config == PCIE_BUS_PEER2PEER) mps = 128; else mps = 128 << dev->pcie_mpss; rc = pcie_set_mps(dev, mps); if (rc) { pci_warn(dev, "can't set Max Payload Size to %d; if necessary, use \"pci=pcie_bus_safe\" and report a bug ", mps); } return; } if (!bridge || !pci_is_pcie(bridge)) return; |
9dae3a972 PCI: Move MPS con... |
1910 1911 1912 1913 1914 1915 1916 |
mps = pcie_get_mps(dev); p_mps = pcie_get_mps(bridge); if (mps == p_mps) return; if (pcie_bus_config == PCIE_BUS_TUNE_OFF) { |
7506dc798 PCI: Add wrappers... |
1917 1918 |
pci_warn(dev, "Max Payload Size %d, but upstream %s set to %d; if necessary, use \"pci=pcie_bus_safe\" and report a bug ", |
9dae3a972 PCI: Move MPS con... |
1919 1920 1921 |
mps, pci_name(bridge), p_mps); return; } |
27d868b5e PCI: Set MPS to m... |
1922 1923 1924 1925 1926 1927 1928 |
/* * Fancier MPS configuration is done later by * pcie_bus_configure_settings() */ if (pcie_bus_config != PCIE_BUS_DEFAULT) return; |
9f0e89359 PCI: Match Root P... |
1929 1930 1931 1932 1933 1934 1935 1936 |
mpss = 128 << dev->pcie_mpss; if (mpss < p_mps && pci_pcie_type(bridge) == PCI_EXP_TYPE_ROOT_PORT) { pcie_set_mps(bridge, mpss); pci_info(dev, "Upstream bridge's Max Payload Size set to %d (was %d, max %d) ", mpss, p_mps, 128 << bridge->pcie_mpss); p_mps = pcie_get_mps(bridge); } |
27d868b5e PCI: Set MPS to m... |
1937 1938 |
rc = pcie_set_mps(dev, p_mps); if (rc) { |
7506dc798 PCI: Add wrappers... |
1939 1940 |
pci_warn(dev, "can't set Max Payload Size to %d; if necessary, use \"pci=pcie_bus_safe\" and report a bug ", |
27d868b5e PCI: Set MPS to m... |
1941 1942 1943 |
p_mps); return; } |
7506dc798 PCI: Add wrappers... |
1944 1945 |
pci_info(dev, "Max Payload Size set to %d (was %d, max %d) ", |
9f0e89359 PCI: Match Root P... |
1946 |
p_mps, mps, mpss); |
9dae3a972 PCI: Move MPS con... |
1947 |
} |
62ce94a7a PCI: Mark Broadco... |
1948 |
int pci_configure_extended_tags(struct pci_dev *dev, void *ign) |
60db3a4d8 PCI: Enable PCIe ... |
1949 |
{ |
62ce94a7a PCI: Mark Broadco... |
1950 1951 1952 |
struct pci_host_bridge *host; u32 cap; u16 ctl; |
60db3a4d8 PCI: Enable PCIe ... |
1953 1954 1955 |
int ret; if (!pci_is_pcie(dev)) |
62ce94a7a PCI: Mark Broadco... |
1956 |
return 0; |
60db3a4d8 PCI: Enable PCIe ... |
1957 |
|
62ce94a7a PCI: Mark Broadco... |
1958 |
ret = pcie_capability_read_dword(dev, PCI_EXP_DEVCAP, &cap); |
60db3a4d8 PCI: Enable PCIe ... |
1959 |
if (ret) |
62ce94a7a PCI: Mark Broadco... |
1960 1961 1962 1963 |
return 0; if (!(cap & PCI_EXP_DEVCAP_EXT_TAG)) return 0; |
60db3a4d8 PCI: Enable PCIe ... |
1964 |
|
62ce94a7a PCI: Mark Broadco... |
1965 1966 1967 1968 1969 1970 1971 |
ret = pcie_capability_read_word(dev, PCI_EXP_DEVCTL, &ctl); if (ret) return 0; host = pci_find_host_bridge(dev->bus); if (!host) return 0; |
60db3a4d8 PCI: Enable PCIe ... |
1972 |
|
62ce94a7a PCI: Mark Broadco... |
1973 1974 1975 1976 1977 1978 |
/* * If some device in the hierarchy doesn't handle Extended Tags * correctly, make sure they're disabled. */ if (host->no_ext_tags) { if (ctl & PCI_EXP_DEVCTL_EXT_TAG) { |
7506dc798 PCI: Add wrappers... |
1979 1980 |
pci_info(dev, "disabling Extended Tags "); |
62ce94a7a PCI: Mark Broadco... |
1981 1982 1983 1984 1985 1986 1987 |
pcie_capability_clear_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_EXT_TAG); } return 0; } if (!(ctl & PCI_EXP_DEVCTL_EXT_TAG)) { |
7506dc798 PCI: Add wrappers... |
1988 1989 |
pci_info(dev, "enabling Extended Tags "); |
60db3a4d8 PCI: Enable PCIe ... |
1990 1991 |
pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_EXT_TAG); |
62ce94a7a PCI: Mark Broadco... |
1992 1993 |
} return 0; |
60db3a4d8 PCI: Enable PCIe ... |
1994 |
} |
a99b646af PCI: Disable PCIe... |
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 |
/** * pcie_relaxed_ordering_enabled - Probe for PCIe relaxed ordering enable * @dev: PCI device to query * * Returns true if the device has enabled relaxed ordering attribute. */ bool pcie_relaxed_ordering_enabled(struct pci_dev *dev) { u16 v; pcie_capability_read_word(dev, PCI_EXP_DEVCTL, &v); return !!(v & PCI_EXP_DEVCTL_RELAX_EN); } EXPORT_SYMBOL(pcie_relaxed_ordering_enabled); static void pci_configure_relaxed_ordering(struct pci_dev *dev) { struct pci_dev *root; /* PCI_EXP_DEVICE_RELAX_EN is RsvdP in VFs */ if (dev->is_virtfn) return; if (!pcie_relaxed_ordering_enabled(dev)) return; /* * For now, we only deal with Relaxed Ordering issues with Root * Ports. Peer-to-Peer DMA is another can of worms. */ |
6ae72bfa6 PCI: Unify pcie_f... |
2026 |
root = pcie_find_root_port(dev); |
a99b646af PCI: Disable PCIe... |
2027 2028 2029 2030 2031 2032 |
if (!root) return; if (root->dev_flags & PCI_DEV_FLAGS_NO_RELAXED_ORDERING) { pcie_capability_clear_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_RELAX_EN); |
7506dc798 PCI: Add wrappers... |
2033 2034 |
pci_info(dev, "Relaxed Ordering disabled because the Root Port didn't support it "); |
a99b646af PCI: Disable PCIe... |
2035 2036 |
} } |
c46fd3580 PCI/ASPM: Enable ... |
2037 2038 2039 |
static void pci_configure_ltr(struct pci_dev *dev) { #ifdef CONFIG_PCIEASPM |
af8bb9f89 PCI/ACPI: Request... |
2040 |
struct pci_host_bridge *host = pci_find_host_bridge(dev->bus); |
c46fd3580 PCI/ASPM: Enable ... |
2041 |
struct pci_dev *bridge; |
10ecc818e PCI/ASPM: Use LTR... |
2042 |
u32 cap, ctl; |
af8bb9f89 PCI/ACPI: Request... |
2043 |
|
c46fd3580 PCI/ASPM: Enable ... |
2044 2045 |
if (!pci_is_pcie(dev)) return; |
ecdf57b4f PCI/ASPM: Remove ... |
2046 2047 |
/* Read L1 PM substate capabilities */ dev->l1ss = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_L1SS); |
c46fd3580 PCI/ASPM: Enable ... |
2048 2049 2050 |
pcie_capability_read_dword(dev, PCI_EXP_DEVCAP2, &cap); if (!(cap & PCI_EXP_DEVCAP2_LTR)) return; |
10ecc818e PCI/ASPM: Use LTR... |
2051 2052 2053 2054 2055 2056 |
pcie_capability_read_dword(dev, PCI_EXP_DEVCTL2, &ctl); if (ctl & PCI_EXP_DEVCTL2_LTR_EN) { if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) { dev->ltr_path = 1; return; } |
c46fd3580 PCI/ASPM: Enable ... |
2057 2058 2059 |
bridge = pci_upstream_bridge(dev); if (bridge && bridge->ltr_path) dev->ltr_path = 1; |
10ecc818e PCI/ASPM: Use LTR... |
2060 2061 |
return; |
c46fd3580 PCI/ASPM: Enable ... |
2062 |
} |
10ecc818e PCI/ASPM: Use LTR... |
2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 |
if (!host->native_ltr) return; /* * Software must not enable LTR in an Endpoint unless the Root * Complex and all intermediate Switches indicate support for LTR. * PCIe r4.0, sec 6.18. */ if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT || ((bridge = pci_upstream_bridge(dev)) && bridge->ltr_path)) { |
c46fd3580 PCI/ASPM: Enable ... |
2074 2075 |
pcie_capability_set_word(dev, PCI_EXP_DEVCTL2, PCI_EXP_DEVCTL2_LTR_EN); |
10ecc818e PCI/ASPM: Use LTR... |
2076 2077 |
dev->ltr_path = 1; } |
c46fd3580 PCI/ASPM: Enable ... |
2078 2079 |
#endif } |
7ce3f912a PCI: Enable PASID... |
2080 2081 2082 2083 |
static void pci_configure_eetlp_prefix(struct pci_dev *dev) { #ifdef CONFIG_PCI_PASID struct pci_dev *bridge; |
9d27e39d3 PCI: Fix enabling... |
2084 |
int pcie_type; |
7ce3f912a PCI: Enable PASID... |
2085 2086 2087 2088 2089 2090 2091 2092 |
u32 cap; if (!pci_is_pcie(dev)) return; pcie_capability_read_dword(dev, PCI_EXP_DEVCAP2, &cap); if (!(cap & PCI_EXP_DEVCAP2_EE_PREFIX)) return; |
9d27e39d3 PCI: Fix enabling... |
2093 2094 2095 |
pcie_type = pci_pcie_type(dev); if (pcie_type == PCI_EXP_TYPE_ROOT_PORT || pcie_type == PCI_EXP_TYPE_RC_END) |
7ce3f912a PCI: Enable PASID... |
2096 2097 2098 2099 2100 2101 2102 2103 |
dev->eetlp_prefix_path = 1; else { bridge = pci_upstream_bridge(dev); if (bridge && bridge->eetlp_prefix_path) dev->eetlp_prefix_path = 1; } #endif } |
b4f6dcb9d PCI: Enable SERR#... |
2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 |
static void pci_configure_serr(struct pci_dev *dev) { u16 control; if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) { /* * A bridge will not forward ERR_ messages coming from an * endpoint unless SERR# forwarding is enabled. */ pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &control); if (!(control & PCI_BRIDGE_CTL_SERR)) { control |= PCI_BRIDGE_CTL_SERR; pci_write_config_word(dev, PCI_BRIDGE_CONTROL, control); } } } |
6cd33649f PCI: Add pci_conf... |
2121 2122 |
static void pci_configure_device(struct pci_dev *dev) { |
9dae3a972 PCI: Move MPS con... |
2123 |
pci_configure_mps(dev); |
62ce94a7a PCI: Mark Broadco... |
2124 |
pci_configure_extended_tags(dev, NULL); |
a99b646af PCI: Disable PCIe... |
2125 |
pci_configure_relaxed_ordering(dev); |
c46fd3580 PCI/ASPM: Enable ... |
2126 |
pci_configure_ltr(dev); |
7ce3f912a PCI: Enable PASID... |
2127 |
pci_configure_eetlp_prefix(dev); |
b4f6dcb9d PCI: Enable SERR#... |
2128 |
pci_configure_serr(dev); |
9dae3a972 PCI: Move MPS con... |
2129 |
|
4a2dbeddd PCI/ACPI: Remove ... |
2130 |
pci_acpi_program_hp_params(dev); |
6cd33649f PCI: Add pci_conf... |
2131 |
} |
201de56eb PCI: centralize t... |
2132 2133 |
static void pci_release_capabilities(struct pci_dev *dev) { |
db89ccbe5 PCI/AER: Define a... |
2134 |
pci_aer_exit(dev); |
201de56eb PCI: centralize t... |
2135 |
pci_vpd_release(dev); |
d1b054da8 PCI: initialize a... |
2136 |
pci_iov_release(dev); |
f796841e4 PCI: fix memleak ... |
2137 |
pci_free_cap_save_buffers(dev); |
201de56eb PCI: centralize t... |
2138 |
} |
1da177e4c Linux-2.6.12-rc2 |
2139 |
/** |
3e466e2d3 PCI: Tidy up pci/... |
2140 2141 |
* pci_release_dev - Free a PCI device structure when all users of it are * finished |
1da177e4c Linux-2.6.12-rc2 |
2142 2143 |
* @dev: device that's been disconnected * |
3e466e2d3 PCI: Tidy up pci/... |
2144 |
* Will be called only by the device core when all users of this PCI device are |
1da177e4c Linux-2.6.12-rc2 |
2145 2146 2147 2148 |
* done. */ static void pci_release_dev(struct device *dev) { |
04480094d Revert "PCI: Remo... |
2149 |
struct pci_dev *pci_dev; |
1da177e4c Linux-2.6.12-rc2 |
2150 |
|
04480094d Revert "PCI: Remo... |
2151 |
pci_dev = to_pci_dev(dev); |
201de56eb PCI: centralize t... |
2152 |
pci_release_capabilities(pci_dev); |
98d9f30c8 pci/of: Match PCI... |
2153 |
pci_release_of_node(pci_dev); |
6ae32c539 PCI: Add pcibios_... |
2154 |
pcibios_release_device(pci_dev); |
8b1fce04d PCI: Convert allo... |
2155 |
pci_bus_put(pci_dev->bus); |
782a985d7 PCI: Introduce ne... |
2156 |
kfree(pci_dev->driver_override); |
c66357927 PCI: Allocate dma... |
2157 |
bitmap_free(pci_dev->dma_alias_mask); |
1da177e4c Linux-2.6.12-rc2 |
2158 2159 |
kfree(pci_dev); } |
3c6e6ae77 PCI: Introduce pc... |
2160 |
struct pci_dev *pci_alloc_dev(struct pci_bus *bus) |
65891215e PCI: Create alloc... |
2161 2162 2163 2164 2165 2166 |
{ struct pci_dev *dev; dev = kzalloc(sizeof(struct pci_dev), GFP_KERNEL); if (!dev) return NULL; |
65891215e PCI: Create alloc... |
2167 |
INIT_LIST_HEAD(&dev->bus_list); |
88e7b167a pci: Set dev->dev... |
2168 |
dev->dev.type = &pci_dev_type; |
3c6e6ae77 PCI: Introduce pc... |
2169 |
dev->bus = pci_bus_get(bus); |
65891215e PCI: Create alloc... |
2170 2171 2172 |
return dev; } |
3c6e6ae77 PCI: Introduce pc... |
2173 |
EXPORT_SYMBOL(pci_alloc_dev); |
62bc6a6f7 PCI: Add pci_bus_... |
2174 2175 2176 2177 |
static bool pci_bus_crs_vendor_id(u32 l) { return (l & 0xffff) == 0x0001; } |
6a802ef0a PCI: Factor out p... |
2178 2179 |
static bool pci_bus_wait_crs(struct pci_bus *bus, int devfn, u32 *l, int timeout) |
1da177e4c Linux-2.6.12-rc2 |
2180 |
{ |
1da177e4c Linux-2.6.12-rc2 |
2181 |
int delay = 1; |
6a802ef0a PCI: Factor out p... |
2182 2183 |
if (!pci_bus_crs_vendor_id(*l)) return true; /* not a CRS completion */ |
1da177e4c Linux-2.6.12-rc2 |
2184 |
|
6a802ef0a PCI: Factor out p... |
2185 2186 |
if (!timeout) return false; /* CRS, but caller doesn't want to wait */ |
1da177e4c Linux-2.6.12-rc2 |
2187 |
|
89665a6a7 PCI: Check only t... |
2188 |
/* |
6a802ef0a PCI: Factor out p... |
2189 2190 2191 |
* We got the reserved Vendor ID that indicates a completion with * Configuration Request Retry Status (CRS). Retry until we get a * valid Vendor ID or we time out. |
89665a6a7 PCI: Check only t... |
2192 |
*/ |
62bc6a6f7 PCI: Add pci_bus_... |
2193 |
while (pci_bus_crs_vendor_id(*l)) { |
6a802ef0a PCI: Factor out p... |
2194 |
if (delay > timeout) { |
e78e661fa PCI: Warn periodi... |
2195 2196 2197 2198 |
pr_warn("pci %04x:%02x:%02x.%d: not ready after %dms; giving up ", pci_domain_nr(bus), bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), delay - 1); |
efdc87dab PCI: Separate pci... |
2199 |
return false; |
1da177e4c Linux-2.6.12-rc2 |
2200 |
} |
e78e661fa PCI: Warn periodi... |
2201 2202 2203 2204 2205 |
if (delay >= 1000) pr_info("pci %04x:%02x:%02x.%d: not ready after %dms; waiting ", pci_domain_nr(bus), bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), delay - 1); |
efdc87dab PCI: Separate pci... |
2206 |
|
1da177e4c Linux-2.6.12-rc2 |
2207 2208 |
msleep(delay); delay *= 2; |
9f9827567 PCI: Always check... |
2209 |
|
efdc87dab PCI: Separate pci... |
2210 2211 |
if (pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, l)) return false; |
1da177e4c Linux-2.6.12-rc2 |
2212 |
} |
e78e661fa PCI: Warn periodi... |
2213 2214 2215 2216 2217 |
if (delay >= 1000) pr_info("pci %04x:%02x:%02x.%d: ready after %dms ", pci_domain_nr(bus), bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn), delay - 1); |
efdc87dab PCI: Separate pci... |
2218 2219 |
return true; } |
6a802ef0a PCI: Factor out p... |
2220 |
|
aa667c640 PCI: Workaround I... |
2221 2222 |
bool pci_bus_generic_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l, int timeout) |
6a802ef0a PCI: Factor out p... |
2223 2224 2225 |
{ if (pci_bus_read_config_dword(bus, devfn, PCI_VENDOR_ID, l)) return false; |
3e466e2d3 PCI: Tidy up pci/... |
2226 |
/* Some broken boards return 0 or ~0 if a slot is empty: */ |
6a802ef0a PCI: Factor out p... |
2227 2228 2229 2230 2231 2232 |
if (*l == 0xffffffff || *l == 0x00000000 || *l == 0x0000ffff || *l == 0xffff0000) return false; if (pci_bus_crs_vendor_id(*l)) return pci_bus_wait_crs(bus, devfn, l, timeout); |
efdc87dab PCI: Separate pci... |
2233 2234 |
return true; } |
aa667c640 PCI: Workaround I... |
2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 |
bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *l, int timeout) { #ifdef CONFIG_PCI_QUIRKS struct pci_dev *bridge = bus->self; /* * Certain IDT switches have an issue where they improperly trigger * ACS Source Validation errors on completions for config reads. */ if (bridge && bridge->vendor == PCI_VENDOR_ID_IDT && bridge->device == 0x80b5) return pci_idt_bus_quirk(bus, devfn, l, timeout); #endif return pci_bus_generic_read_dev_vendor_id(bus, devfn, l, timeout); } |
efdc87dab PCI: Separate pci... |
2253 2254 2255 |
EXPORT_SYMBOL(pci_bus_read_dev_vendor_id); /* |
3e466e2d3 PCI: Tidy up pci/... |
2256 2257 |
* Read the config data for a PCI device, sanity-check it, * and fill in the dev structure. |
efdc87dab PCI: Separate pci... |
2258 2259 2260 2261 2262 2263 2264 2265 |
*/ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn) { struct pci_dev *dev; u32 l; if (!pci_bus_read_dev_vendor_id(bus, devfn, &l, 60*1000)) return NULL; |
8b1fce04d PCI: Convert allo... |
2266 |
dev = pci_alloc_dev(bus); |
1da177e4c Linux-2.6.12-rc2 |
2267 2268 |
if (!dev) return NULL; |
1da177e4c Linux-2.6.12-rc2 |
2269 |
dev->devfn = devfn; |
1da177e4c Linux-2.6.12-rc2 |
2270 2271 |
dev->vendor = l & 0xffff; dev->device = (l >> 16) & 0xffff; |
cef354db0 PCI: connect stru... |
2272 |
|
98d9f30c8 pci/of: Match PCI... |
2273 |
pci_set_of_node(dev); |
480b93b78 PCI: centralize d... |
2274 |
if (pci_setup_device(dev)) { |
8b1fce04d PCI: Convert allo... |
2275 |
pci_bus_put(dev->bus); |
1da177e4c Linux-2.6.12-rc2 |
2276 2277 2278 |
kfree(dev); return NULL; } |
1da177e4c Linux-2.6.12-rc2 |
2279 2280 2281 |
return dev; } |
0fa635aec PCI/LINK: Dedupli... |
2282 |
void pcie_report_downtraining(struct pci_dev *dev) |
2d1ce5ec2 PCI: Check for PC... |
2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 |
{ if (!pci_is_pcie(dev)) return; /* Look from the device up to avoid downstream ports with no devices */ if ((pci_pcie_type(dev) != PCI_EXP_TYPE_ENDPOINT) && (pci_pcie_type(dev) != PCI_EXP_TYPE_LEG_END) && (pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM)) return; /* Multi-function PCIe devices share the same link/status */ if (PCI_FUNC(dev->devfn) != 0 || dev->is_virtfn) return; /* Print link status only if the device is constrained by the fabric */ __pcie_print_link_status(dev, false); } |
201de56eb PCI: centralize t... |
2300 2301 |
static void pci_init_capabilities(struct pci_dev *dev) { |
9d8b738bb PCI: Remove usele... |
2302 |
pci_ea_init(dev); /* Enhanced Allocation */ |
938174e59 PCI: Add support ... |
2303 |
|
e80e7edc5 PCI/MSI: Initiali... |
2304 2305 |
/* Setup MSI caps & disable MSI/MSI-X interrupts */ pci_msi_setup_pci_dev(dev); |
201de56eb PCI: centralize t... |
2306 |
|
63f4898ac PCI: handle PCI s... |
2307 2308 |
/* Buffers for saving PCIe and PCI-X capabilities */ pci_allocate_cap_save_buffers(dev); |
9d8b738bb PCI: Remove usele... |
2309 2310 2311 2312 2313 |
pci_pm_init(dev); /* Power Management */ pci_vpd_init(dev); /* Vital Product Data */ pci_configure_ari(dev); /* Alternative Routing-ID Forwarding */ pci_iov_init(dev); /* Single Root I/O Virtualization */ pci_ats_init(dev); /* Address Translation Services */ |
7e124c405 Merge branch 'pci... |
2314 2315 |
pci_pri_init(dev); /* Page Request Interface */ pci_pasid_init(dev); /* Process Address Space ID */ |
52fbf5bde PCI: Cache ACS ca... |
2316 |
pci_acs_init(dev); /* Access Control Services */ |
9d8b738bb PCI: Remove usele... |
2317 2318 |
pci_ptm_init(dev); /* Precision Time Measurement */ pci_aer_init(dev); /* Advanced Error Reporting */ |
270056181 PCI/DPC: Cache DP... |
2319 |
pci_dpc_init(dev); /* Downstream Port Containment */ |
5b0764cac PCI: Probe for de... |
2320 |
|
2d1ce5ec2 PCI: Check for PC... |
2321 |
pcie_report_downtraining(dev); |
5b0764cac PCI: Probe for de... |
2322 2323 |
if (pci_probe_reset_function(dev) == 0) dev->reset_fn = 1; |
201de56eb PCI: centralize t... |
2324 |
} |
098259eb1 PCI: Add per-devi... |
2325 |
/* |
3e466e2d3 PCI: Tidy up pci/... |
2326 |
* This is the equivalent of pci_host_bridge_msi_domain() that acts on |
098259eb1 PCI: Add per-devi... |
2327 2328 2329 2330 2331 2332 2333 2334 |
* devices. Firmware interfaces that can select the MSI domain on a * per-device basis should be called from here. */ static struct irq_domain *pci_dev_msi_domain(struct pci_dev *dev) { struct irq_domain *d; /* |
3e466e2d3 PCI: Tidy up pci/... |
2335 |
* If a domain has been set through the pcibios_add_device() |
098259eb1 PCI: Add per-devi... |
2336 2337 2338 2339 2340 |
* callback, then this is the one (platform code knows best). */ d = dev_get_msi_domain(&dev->dev); if (d) return d; |
54fa97eeb PCI/MSI: Allow th... |
2341 2342 2343 2344 2345 2346 2347 |
/* * Let's see if we have a firmware interface able to provide * the domain. */ d = pci_msi_get_device_domain(dev); if (d) return d; |
098259eb1 PCI: Add per-devi... |
2348 2349 |
return NULL; } |
44aa0c657 PCI/MSI: Add hook... |
2350 2351 |
static void pci_set_msi_domain(struct pci_dev *dev) { |
098259eb1 PCI: Add per-devi... |
2352 |
struct irq_domain *d; |
44aa0c657 PCI/MSI: Add hook... |
2353 |
/* |
098259eb1 PCI: Add per-devi... |
2354 2355 2356 |
* If the platform or firmware interfaces cannot supply a * device-specific MSI domain, then inherit the default domain * from the host bridge itself. |
44aa0c657 PCI/MSI: Add hook... |
2357 |
*/ |
098259eb1 PCI: Add per-devi... |
2358 2359 2360 2361 2362 |
d = pci_dev_msi_domain(dev); if (!d) d = dev_get_msi_domain(&dev->bus->dev); dev_set_msi_domain(&dev->dev, d); |
44aa0c657 PCI/MSI: Add hook... |
2363 |
} |
96bde06a2 pci: do not mark ... |
2364 |
void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) |
1da177e4c Linux-2.6.12-rc2 |
2365 |
{ |
4f535093c PCI: Put pci_dev ... |
2366 |
int ret; |
6cd33649f PCI: Add pci_conf... |
2367 |
pci_configure_device(dev); |
cdb9b9f73 [PATCH] PCI: Smal... |
2368 2369 |
device_initialize(&dev->dev); dev->dev.release = pci_release_dev; |
1da177e4c Linux-2.6.12-rc2 |
2370 |
|
7629d19a4 PCI: Set pci_dev ... |
2371 |
set_dev_node(&dev->dev, pcibus_to_node(bus)); |
cdb9b9f73 [PATCH] PCI: Smal... |
2372 |
dev->dev.dma_mask = &dev->dma_mask; |
4d57cdfac iommu sg merging:... |
2373 |
dev->dev.dma_parms = &dev->dma_parms; |
cdb9b9f73 [PATCH] PCI: Smal... |
2374 |
dev->dev.coherent_dma_mask = 0xffffffffull; |
1da177e4c Linux-2.6.12-rc2 |
2375 |
|
b0da3498c PCI: Remove pci_s... |
2376 |
dma_set_max_seg_size(&dev->dev, 65536); |
a6f44cf9f PCI: Remove pci_s... |
2377 |
dma_set_seg_boundary(&dev->dev, 0xffffffff); |
4d57cdfac iommu sg merging:... |
2378 |
|
1da177e4c Linux-2.6.12-rc2 |
2379 2380 |
/* Fix up broken headers */ pci_fixup_device(pci_fixup_header, dev); |
2069ecfbe PCI: Move "pci re... |
2381 |
pci_reassigndev_resource_alignment(dev); |
4b77b0a2b PCI: Clear saved_... |
2382 |
dev->state_saved = false; |
201de56eb PCI: centralize t... |
2383 |
pci_init_capabilities(dev); |
eb9d0fe40 PCI ACPI: Rework ... |
2384 |
|
1da177e4c Linux-2.6.12-rc2 |
2385 2386 2387 2388 |
/* * Add the device to our list of discovered devices * and the bus list for fixup functions, etc. */ |
d71374daf [PATCH] PCI: fix ... |
2389 |
down_write(&pci_bus_sem); |
1da177e4c Linux-2.6.12-rc2 |
2390 |
list_add_tail(&dev->bus_list, &bus->devices); |
d71374daf [PATCH] PCI: fix ... |
2391 |
up_write(&pci_bus_sem); |
4f535093c PCI: Put pci_dev ... |
2392 |
|
4f535093c PCI: Put pci_dev ... |
2393 2394 |
ret = pcibios_add_device(dev); WARN_ON(ret < 0); |
3e466e2d3 PCI: Tidy up pci/... |
2395 |
/* Set up MSI IRQ domain */ |
44aa0c657 PCI/MSI: Add hook... |
2396 |
pci_set_msi_domain(dev); |
4f535093c PCI: Put pci_dev ... |
2397 2398 2399 2400 |
/* Notifier could use PCI capabilities */ dev->match_driver = false; ret = device_add(&dev->dev); WARN_ON(ret < 0); |
cdb9b9f73 [PATCH] PCI: Smal... |
2401 |
} |
10874f5a0 PCI: Remove unnec... |
2402 |
struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn) |
cdb9b9f73 [PATCH] PCI: Smal... |
2403 2404 |
{ struct pci_dev *dev; |
90bdb3117 PCI: don't scan e... |
2405 2406 2407 2408 2409 |
dev = pci_get_slot(bus, devfn); if (dev) { pci_dev_put(dev); return dev; } |
cdb9b9f73 [PATCH] PCI: Smal... |
2410 2411 2412 2413 2414 |
dev = pci_scan_device(bus, devfn); if (!dev) return NULL; pci_device_add(dev, bus); |
1da177e4c Linux-2.6.12-rc2 |
2415 2416 2417 |
return dev; } |
b73e96878 PCI: always expor... |
2418 |
EXPORT_SYMBOL(pci_scan_single_device); |
1da177e4c Linux-2.6.12-rc2 |
2419 |
|
b1bd58e44 PCI: Consolidate ... |
2420 |
static unsigned next_fn(struct pci_bus *bus, struct pci_dev *dev, unsigned fn) |
f07852d64 PCI: Rewrite pci_... |
2421 |
{ |
b1bd58e44 PCI: Consolidate ... |
2422 2423 2424 |
int pos; u16 cap = 0; unsigned next_fn; |
4fb88c1a2 PCI: Make pci_sca... |
2425 |
|
b1bd58e44 PCI: Consolidate ... |
2426 2427 2428 2429 2430 2431 |
if (pci_ari_enabled(bus)) { if (!dev) return 0; pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ARI); if (!pos) return 0; |
4fb88c1a2 PCI: Make pci_sca... |
2432 |
|
b1bd58e44 PCI: Consolidate ... |
2433 2434 2435 2436 |
pci_read_config_word(dev, pos + PCI_ARI_CAP, &cap); next_fn = PCI_ARI_CAP_NFN(cap); if (next_fn <= fn) return 0; /* protect against malformed list */ |
f07852d64 PCI: Rewrite pci_... |
2437 |
|
b1bd58e44 PCI: Consolidate ... |
2438 2439 2440 2441 2442 2443 |
return next_fn; } /* dev may be NULL for non-contiguous multifunction devices */ if (!dev || dev->multifunction) return (fn + 1) % 8; |
f07852d64 PCI: Rewrite pci_... |
2444 |
|
f07852d64 PCI: Rewrite pci_... |
2445 2446 2447 2448 2449 |
return 0; } static int only_one_child(struct pci_bus *bus) { |
d57f0b8c8 PCI: Make PCI_SCA... |
2450 |
struct pci_dev *bridge = bus->self; |
284f5f9db PCI: work around ... |
2451 |
|
d57f0b8c8 PCI: Make PCI_SCA... |
2452 2453 2454 2455 2456 |
/* * Systems with unusual topologies set PCI_SCAN_ALL_PCIE_DEVS so * we scan for all possible devices, not just Device 0. */ if (pci_has_flag(PCI_SCAN_ALL_PCIE_DEVS)) |
f07852d64 PCI: Rewrite pci_... |
2457 |
return 0; |
5bbe029ff PCI: Move pci_set... |
2458 2459 |
/* |
d57f0b8c8 PCI: Make PCI_SCA... |
2460 2461 2462 |
* A PCIe Downstream Port normally leads to a Link with only Device * 0 on it (PCIe spec r3.1, sec 7.3.1). As an optimization, scan * only for Device 0 in that situation. |
5bbe029ff PCI: Move pci_set... |
2463 |
*/ |
ca7841040 PCI: Get rid of d... |
2464 |
if (bridge && pci_is_pcie(bridge) && pcie_downstream_port(bridge)) |
f07852d64 PCI: Rewrite pci_... |
2465 |
return 1; |
d57f0b8c8 PCI: Make PCI_SCA... |
2466 |
|
f07852d64 PCI: Rewrite pci_... |
2467 2468 |
return 0; } |
1da177e4c Linux-2.6.12-rc2 |
2469 |
/** |
3e466e2d3 PCI: Tidy up pci/... |
2470 |
* pci_scan_slot - Scan a PCI slot on a bus for devices |
1da177e4c Linux-2.6.12-rc2 |
2471 |
* @bus: PCI bus to scan |
3e466e2d3 PCI: Tidy up pci/... |
2472 |
* @devfn: slot number to scan (must have zero function) |
1da177e4c Linux-2.6.12-rc2 |
2473 2474 2475 |
* * Scan a PCI slot on the specified PCI bus for devices, adding * discovered devices to the @bus->devices list. New devices |
8a1bc9013 PCI: add is_added... |
2476 |
* will not have is_added set. |
1b69dfc64 PCI: pci_scan_slo... |
2477 2478 |
* * Returns the number of new devices found. |
1da177e4c Linux-2.6.12-rc2 |
2479 |
*/ |
96bde06a2 pci: do not mark ... |
2480 |
int pci_scan_slot(struct pci_bus *bus, int devfn) |
1da177e4c Linux-2.6.12-rc2 |
2481 |
{ |
f07852d64 PCI: Rewrite pci_... |
2482 |
unsigned fn, nr = 0; |
1b69dfc64 PCI: pci_scan_slo... |
2483 |
struct pci_dev *dev; |
f07852d64 PCI: Rewrite pci_... |
2484 2485 2486 |
if (only_one_child(bus) && (devfn > 0)) return 0; /* Already scanned the entire slot */ |
1da177e4c Linux-2.6.12-rc2 |
2487 |
|
1b69dfc64 PCI: pci_scan_slo... |
2488 |
dev = pci_scan_single_device(bus, devfn); |
4fb88c1a2 PCI: Make pci_sca... |
2489 2490 |
if (!dev) return 0; |
44bda4b7d PCI: Fix is_added... |
2491 |
if (!pci_dev_is_added(dev)) |
1b69dfc64 PCI: pci_scan_slo... |
2492 |
nr++; |
b1bd58e44 PCI: Consolidate ... |
2493 |
for (fn = next_fn(bus, dev, 0); fn > 0; fn = next_fn(bus, dev, fn)) { |
f07852d64 PCI: Rewrite pci_... |
2494 2495 |
dev = pci_scan_single_device(bus, devfn + fn); if (dev) { |
44bda4b7d PCI: Fix is_added... |
2496 |
if (!pci_dev_is_added(dev)) |
f07852d64 PCI: Rewrite pci_... |
2497 2498 |
nr++; dev->multifunction = 1; |
1da177e4c Linux-2.6.12-rc2 |
2499 2500 |
} } |
7d715a6c1 PCI: add PCI Expr... |
2501 |
|
3e466e2d3 PCI: Tidy up pci/... |
2502 |
/* Only one slot has PCIe device */ |
149e16372 PCI: disable ASPM... |
2503 |
if (bus->self && nr) |
7d715a6c1 PCI: add PCI Expr... |
2504 |
pcie_aspm_init_link_state(bus->self); |
1da177e4c Linux-2.6.12-rc2 |
2505 2506 |
return nr; } |
b7fe94342 PCI: Move EXPORT_... |
2507 |
EXPORT_SYMBOL(pci_scan_slot); |
1da177e4c Linux-2.6.12-rc2 |
2508 |
|
b03e7495a PCI: Set PCI-E Ma... |
2509 2510 2511 2512 2513 2514 |
static int pcie_find_smpss(struct pci_dev *dev, void *data) { u8 *smpss = data; if (!pci_is_pcie(dev)) return 0; |
d4aa68f61 PCI: Don't restri... |
2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 |
/* * We don't have a way to change MPS settings on devices that have * drivers attached. A hot-added device might support only the minimum * MPS setting (MPS=128). Therefore, if the fabric contains a bridge * where devices may be hot-added, we limit the fabric MPS to 128 so * hot-added devices will work correctly. * * However, if we hot-add a device to a slot directly below a Root * Port, it's impossible for there to be other existing devices below * the port. We don't limit the MPS in this case because we can * reconfigure MPS on both the Root Port and the hot-added device, * and there are no other devices involved. * * Note that this PCIE_BUS_SAFE path assumes no peer-to-peer DMA. |
b03e7495a PCI: Set PCI-E Ma... |
2529 |
*/ |
d4aa68f61 PCI: Don't restri... |
2530 2531 |
if (dev->is_hotplug_bridge && pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT) |
b03e7495a PCI: Set PCI-E Ma... |
2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 |
*smpss = 0; if (*smpss > dev->pcie_mpss) *smpss = dev->pcie_mpss; return 0; } static void pcie_write_mps(struct pci_dev *dev, int mps) { |
62f392ea5 PCI: enable MPS "... |
2542 |
int rc; |
b03e7495a PCI: Set PCI-E Ma... |
2543 2544 |
if (pcie_bus_config == PCIE_BUS_PERFORMANCE) { |
62f392ea5 PCI: enable MPS "... |
2545 |
mps = 128 << dev->pcie_mpss; |
b03e7495a PCI: Set PCI-E Ma... |
2546 |
|
62f87c0e3 PCI: Introduce pc... |
2547 2548 |
if (pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT && dev->bus->self) |
3e466e2d3 PCI: Tidy up pci/... |
2549 2550 2551 |
/* * For "Performance", the assumption is made that |
b03e7495a PCI: Set PCI-E Ma... |
2552 2553 2554 2555 2556 |
* downstream communication will never be larger than * the MRRS. So, the MPS only needs to be configured * for the upstream communication. This being the case, * walk from the top down and set the MPS of the child * to that of the parent bus. |
62f392ea5 PCI: enable MPS "... |
2557 2558 2559 2560 2561 |
* * Configure the device MPS with the smaller of the * device MPSS or the bridge MPS (which is assumed to be * properly configured at this point to the largest * allowable MPS based on its parent bus). |
b03e7495a PCI: Set PCI-E Ma... |
2562 |
*/ |
62f392ea5 PCI: enable MPS "... |
2563 |
mps = min(mps, pcie_get_mps(dev->bus->self)); |
b03e7495a PCI: Set PCI-E Ma... |
2564 2565 2566 2567 |
} rc = pcie_set_mps(dev, mps); if (rc) |
7506dc798 PCI: Add wrappers... |
2568 2569 |
pci_err(dev, "Failed attempting to set the MPS "); |
b03e7495a PCI: Set PCI-E Ma... |
2570 |
} |
62f392ea5 PCI: enable MPS "... |
2571 |
static void pcie_write_mrrs(struct pci_dev *dev) |
b03e7495a PCI: Set PCI-E Ma... |
2572 |
{ |
62f392ea5 PCI: enable MPS "... |
2573 |
int rc, mrrs; |
b03e7495a PCI: Set PCI-E Ma... |
2574 |
|
3e466e2d3 PCI: Tidy up pci/... |
2575 2576 |
/* * In the "safe" case, do not configure the MRRS. There appear to be |
ed2888e90 PCI: Remove MRRS ... |
2577 2578 |
* issues with setting MRRS to 0 on a number of devices. */ |
ed2888e90 PCI: Remove MRRS ... |
2579 2580 |
if (pcie_bus_config != PCIE_BUS_PERFORMANCE) return; |
3e466e2d3 PCI: Tidy up pci/... |
2581 2582 |
/* * For max performance, the MRRS must be set to the largest supported |
ed2888e90 PCI: Remove MRRS ... |
2583 |
* value. However, it cannot be configured larger than the MPS the |
62f392ea5 PCI: enable MPS "... |
2584 |
* device or the bus can support. This should already be properly |
3e466e2d3 PCI: Tidy up pci/... |
2585 |
* configured by a prior call to pcie_write_mps(). |
ed2888e90 PCI: Remove MRRS ... |
2586 |
*/ |
62f392ea5 PCI: enable MPS "... |
2587 |
mrrs = pcie_get_mps(dev); |
b03e7495a PCI: Set PCI-E Ma... |
2588 |
|
3e466e2d3 PCI: Tidy up pci/... |
2589 2590 |
/* * MRRS is a R/W register. Invalid values can be written, but a |
ed2888e90 PCI: Remove MRRS ... |
2591 |
* subsequent read will verify if the value is acceptable or not. |
b03e7495a PCI: Set PCI-E Ma... |
2592 2593 |
* If the MRRS value provided is not acceptable (e.g., too large), * shrink the value until it is acceptable to the HW. |
f7625980f PCI: Fix whitespa... |
2594 |
*/ |
b03e7495a PCI: Set PCI-E Ma... |
2595 2596 |
while (mrrs != pcie_get_readrq(dev) && mrrs >= 128) { rc = pcie_set_readrq(dev, mrrs); |
62f392ea5 PCI: enable MPS "... |
2597 2598 |
if (!rc) break; |
b03e7495a PCI: Set PCI-E Ma... |
2599 |
|
7506dc798 PCI: Add wrappers... |
2600 2601 |
pci_warn(dev, "Failed attempting to set the MRRS "); |
b03e7495a PCI: Set PCI-E Ma... |
2602 2603 |
mrrs /= 2; } |
62f392ea5 PCI: enable MPS "... |
2604 2605 |
if (mrrs < 128) |
7506dc798 PCI: Add wrappers... |
2606 2607 |
pci_err(dev, "MRRS was unable to be configured with a safe value. If problems are experienced, try running with pci=pcie_bus_safe "); |
b03e7495a PCI: Set PCI-E Ma... |
2608 2609 2610 2611 |
} static int pcie_bus_configure_set(struct pci_dev *dev, void *data) { |
a513a99a7 PCI: Clean-up MPS... |
2612 |
int mps, orig_mps; |
b03e7495a PCI: Set PCI-E Ma... |
2613 2614 2615 |
if (!pci_is_pcie(dev)) return 0; |
27d868b5e PCI: Set MPS to m... |
2616 2617 |
if (pcie_bus_config == PCIE_BUS_TUNE_OFF || pcie_bus_config == PCIE_BUS_DEFAULT) |
5895af791 PCI: Warn if unsa... |
2618 |
return 0; |
5895af791 PCI: Warn if unsa... |
2619 |
|
a513a99a7 PCI: Clean-up MPS... |
2620 2621 |
mps = 128 << *(u8 *)data; orig_mps = pcie_get_mps(dev); |
b03e7495a PCI: Set PCI-E Ma... |
2622 2623 |
pcie_write_mps(dev, mps); |
62f392ea5 PCI: enable MPS "... |
2624 |
pcie_write_mrrs(dev); |
b03e7495a PCI: Set PCI-E Ma... |
2625 |
|
7506dc798 PCI: Add wrappers... |
2626 2627 |
pci_info(dev, "Max Payload Size set to %4d/%4d (was %4d), Max Read Rq %4d ", |
227f06470 PCI: Merge multi-... |
2628 |
pcie_get_mps(dev), 128 << dev->pcie_mpss, |
a513a99a7 PCI: Clean-up MPS... |
2629 |
orig_mps, pcie_get_readrq(dev)); |
b03e7495a PCI: Set PCI-E Ma... |
2630 2631 2632 |
return 0; } |
3e466e2d3 PCI: Tidy up pci/... |
2633 2634 |
/* * pcie_bus_configure_settings() requires that pci_walk_bus work in a top-down, |
b03e7495a PCI: Set PCI-E Ma... |
2635 2636 2637 |
* parents then children fashion. If this changes, then this code will not * work as designed. */ |
a58674ff8 PCI: Simplify pci... |
2638 |
void pcie_bus_configure_settings(struct pci_bus *bus) |
b03e7495a PCI: Set PCI-E Ma... |
2639 |
{ |
1e358f94c PCI: Fix use of u... |
2640 |
u8 smpss = 0; |
b03e7495a PCI: Set PCI-E Ma... |
2641 |
|
a58674ff8 PCI: Simplify pci... |
2642 |
if (!bus->self) |
b03e7495a PCI: Set PCI-E Ma... |
2643 |
return; |
b03e7495a PCI: Set PCI-E Ma... |
2644 |
if (!pci_is_pcie(bus->self)) |
5f39e6705 PCI: Disable MPS ... |
2645 |
return; |
3e466e2d3 PCI: Tidy up pci/... |
2646 2647 |
/* * FIXME - Peer to peer DMA is possible, though the endpoint would need |
3315472c4 PCI: Fix MPS peer... |
2648 |
* to be aware of the MPS of the destination. To work around this, |
5f39e6705 PCI: Disable MPS ... |
2649 2650 2651 2652 |
* simply force the MPS of the entire system to the smallest possible. */ if (pcie_bus_config == PCIE_BUS_PEER2PEER) smpss = 0; |
b03e7495a PCI: Set PCI-E Ma... |
2653 |
if (pcie_bus_config == PCIE_BUS_SAFE) { |
a58674ff8 PCI: Simplify pci... |
2654 |
smpss = bus->self->pcie_mpss; |
5f39e6705 PCI: Disable MPS ... |
2655 |
|
b03e7495a PCI: Set PCI-E Ma... |
2656 2657 2658 2659 2660 2661 2662 |
pcie_find_smpss(bus->self, &smpss); pci_walk_bus(bus, pcie_find_smpss, &smpss); } pcie_bus_configure_set(bus->self, &smpss); pci_walk_bus(bus, pcie_bus_configure_set, &smpss); } |
debc3b778 PCI: export pcie_... |
2663 |
EXPORT_SYMBOL_GPL(pcie_bus_configure_settings); |
b03e7495a PCI: Set PCI-E Ma... |
2664 |
|
bccf90d6e PCI: Add a generi... |
2665 2666 2667 2668 2669 2670 2671 2672 |
/* * Called after each bus is probed, but before its children are examined. This * is marked as __weak because multiple architectures define it. */ void __weak pcibios_fixup_bus(struct pci_bus *bus) { /* nothing to do, expected to be removed in the future */ } |
1c02ea810 PCI: Distribute a... |
2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 |
/** * pci_scan_child_bus_extend() - Scan devices below a bus * @bus: Bus to scan for devices * @available_buses: Total number of buses available (%0 does not try to * extend beyond the minimal) * * Scans devices below @bus including subordinate buses. Returns new * subordinate number including all the found devices. Passing * @available_buses causes the remaining bus space to be distributed * equally between hotplug-capable bridges to allow future extension of the * hierarchy. */ static unsigned int pci_scan_child_bus_extend(struct pci_bus *bus, unsigned int available_buses) |
1da177e4c Linux-2.6.12-rc2 |
2687 |
{ |
1c02ea810 PCI: Distribute a... |
2688 2689 |
unsigned int used_buses, normal_bridges = 0, hotplug_bridges = 0; unsigned int start = bus->busn_res.start; |
690f43041 PCI: Scan all fun... |
2690 |
unsigned int devfn, fn, cmax, max = start; |
1da177e4c Linux-2.6.12-rc2 |
2691 |
struct pci_dev *dev; |
690f43041 PCI: Scan all fun... |
2692 |
int nr_devs; |
1da177e4c Linux-2.6.12-rc2 |
2693 |
|
0207c356e PCI: replace pr_d... |
2694 2695 |
dev_dbg(&bus->dev, "scanning bus "); |
1da177e4c Linux-2.6.12-rc2 |
2696 2697 |
/* Go find them, Rover! */ |
690f43041 PCI: Scan all fun... |
2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 |
for (devfn = 0; devfn < 256; devfn += 8) { nr_devs = pci_scan_slot(bus, devfn); /* * The Jailhouse hypervisor may pass individual functions of a * multi-function device to a guest without passing function 0. * Look for them as well. */ if (jailhouse_paravirt() && nr_devs == 0) { for (fn = 1; fn < 8; fn++) { dev = pci_scan_single_device(bus, devfn + fn); if (dev) dev->multifunction = 1; } } } |
1da177e4c Linux-2.6.12-rc2 |
2714 |
|
3e466e2d3 PCI: Tidy up pci/... |
2715 |
/* Reserve buses for SR-IOV capability */ |
1c02ea810 PCI: Distribute a... |
2716 2717 |
used_buses = pci_iov_bus_range(bus); max += used_buses; |
a28724b0f PCI: reserve bus ... |
2718 |
|
1da177e4c Linux-2.6.12-rc2 |
2719 2720 2721 2722 |
/* * After performing arch-dependent fixup of the bus, look behind * all PCI-to-PCI bridges on this bus. */ |
74710ded8 PCI: always scan ... |
2723 |
if (!bus->is_added) { |
0207c356e PCI: replace pr_d... |
2724 2725 |
dev_dbg(&bus->dev, "fixups for bus "); |
74710ded8 PCI: always scan ... |
2726 |
pcibios_fixup_bus(bus); |
981cf9ea9 PCI: Clean up usa... |
2727 |
bus->is_added = 1; |
74710ded8 PCI: always scan ... |
2728 |
} |
4147c2fd9 PCI: Open-code th... |
2729 |
/* |
1c02ea810 PCI: Distribute a... |
2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 |
* Calculate how many hotplug bridges and normal bridges there * are on this bus. We will distribute the additional available * buses between hotplug bridges. */ for_each_pci_bridge(dev, bus) { if (dev->is_hotplug_bridge) hotplug_bridges++; else normal_bridges++; } /* |
4147c2fd9 PCI: Open-code th... |
2742 2743 2744 2745 |
* Scan bridges that are already configured. We don't touch them * unless they are misconfigured (which will be done in the second * scan below). */ |
1c02ea810 PCI: Distribute a... |
2746 2747 2748 |
for_each_pci_bridge(dev, bus) { cmax = max; max = pci_scan_bridge_extend(bus, dev, max, 0, 0); |
3374c545c PCI: Account for ... |
2749 2750 2751 2752 2753 2754 2755 2756 |
/* * Reserve one bus for each bridge now to avoid extending * hotplug bridges too much during the second scan below. */ used_buses++; if (cmax - max > 1) used_buses += cmax - max - 1; |
1c02ea810 PCI: Distribute a... |
2757 |
} |
4147c2fd9 PCI: Open-code th... |
2758 2759 |
/* Scan bridges that need to be reconfigured */ |
1c02ea810 PCI: Distribute a... |
2760 2761 2762 2763 |
for_each_pci_bridge(dev, bus) { unsigned int buses = 0; if (!hotplug_bridges && normal_bridges == 1) { |
3e466e2d3 PCI: Tidy up pci/... |
2764 |
|
1c02ea810 PCI: Distribute a... |
2765 2766 2767 2768 2769 2770 2771 2772 |
/* * There is only one bridge on the bus (upstream * port) so it gets all available buses which it * can then distribute to the possible hotplug * bridges below. */ buses = available_buses; } else if (dev->is_hotplug_bridge) { |
3e466e2d3 PCI: Tidy up pci/... |
2773 |
|
1c02ea810 PCI: Distribute a... |
2774 2775 2776 2777 2778 |
/* * Distribute the extra buses between hotplug * bridges if any. */ buses = available_buses / hotplug_bridges; |
3374c545c PCI: Account for ... |
2779 |
buses = min(buses, available_buses - used_buses + 1); |
1c02ea810 PCI: Distribute a... |
2780 2781 2782 2783 |
} cmax = max; max = pci_scan_bridge_extend(bus, dev, cmax, buses, 1); |
3374c545c PCI: Account for ... |
2784 2785 2786 |
/* One bus is already accounted so don't add it again */ if (max - cmax > 1) used_buses += max - cmax - 1; |
1c02ea810 PCI: Distribute a... |
2787 |
} |
1da177e4c Linux-2.6.12-rc2 |
2788 2789 |
/* |
e16b46605 PCI: Allow additi... |
2790 |
* Make sure a hotplug bridge has at least the minimum requested |
1c02ea810 PCI: Distribute a... |
2791 2792 |
* number of buses but allow it to grow up to the maximum available * bus number of there is room. |
e16b46605 PCI: Allow additi... |
2793 |
*/ |
1c02ea810 PCI: Distribute a... |
2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 |
if (bus->self && bus->self->is_hotplug_bridge) { used_buses = max_t(unsigned int, available_buses, pci_hotplug_bus_size - 1); if (max - start < used_buses) { max = start + used_buses; /* Do not allocate more buses than we have room left */ if (max > bus->busn_res.end) max = bus->busn_res.end; dev_dbg(&bus->dev, "%pR extended by %#02x ", &bus->busn_res, max - start); } |
e16b46605 PCI: Allow additi... |
2808 2809 2810 |
} /* |
1da177e4c Linux-2.6.12-rc2 |
2811 2812 2813 2814 2815 2816 |
* We've scanned the bus and so we know all about what's on * the other side of any bridges that may be on this bus plus * any devices. * * Return how far we've got finding sub-buses. */ |
0207c356e PCI: replace pr_d... |
2817 2818 |
dev_dbg(&bus->dev, "bus scan returning with max=%02x ", max); |
1da177e4c Linux-2.6.12-rc2 |
2819 2820 |
return max; } |
1c02ea810 PCI: Distribute a... |
2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 |
/** * pci_scan_child_bus() - Scan devices below a bus * @bus: Bus to scan for devices * * Scans devices below @bus including subordinate buses. Returns new * subordinate number including all the found devices. */ unsigned int pci_scan_child_bus(struct pci_bus *bus) { return pci_scan_child_bus_extend(bus, 0); } |
b7fe94342 PCI: Move EXPORT_... |
2833 |
EXPORT_SYMBOL_GPL(pci_scan_child_bus); |
1da177e4c Linux-2.6.12-rc2 |
2834 |
|
6c0cc950a ACPI / PCI: Set r... |
2835 |
/** |
3e466e2d3 PCI: Tidy up pci/... |
2836 2837 |
* pcibios_root_bridge_prepare - Platform-specific host bridge setup * @bridge: Host bridge to set up |
6c0cc950a ACPI / PCI: Set r... |
2838 2839 2840 2841 2842 2843 2844 2845 |
* * Default empty implementation. Replace with an architecture-specific setup * routine, if necessary. */ int __weak pcibios_root_bridge_prepare(struct pci_host_bridge *bridge) { return 0; } |
10a957475 PCI: Add pcibios ... |
2846 2847 2848 2849 2850 2851 2852 |
void __weak pcibios_add_bus(struct pci_bus *bus) { } void __weak pcibios_remove_bus(struct pci_bus *bus) { } |
9ee8a1c4a PCI: Remove pci_s... |
2853 2854 |
struct pci_bus *pci_create_root_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata, struct list_head *resources) |
1da177e4c Linux-2.6.12-rc2 |
2855 |
{ |
0efd5aab4 PCI: add struct p... |
2856 |
int error; |
5a21d70db PCI: add struct p... |
2857 |
struct pci_host_bridge *bridge; |
1da177e4c Linux-2.6.12-rc2 |
2858 |
|
590940659 PCI: Allow driver... |
2859 |
bridge = pci_alloc_host_bridge(0); |
7b5436635 PCI: add generic ... |
2860 |
if (!bridge) |
37d6a0a6f PCI: Add pci_regi... |
2861 |
return NULL; |
7b5436635 PCI: add generic ... |
2862 2863 |
bridge->dev.parent = parent; |
a9d9f5276 PCI: show host br... |
2864 |
|
37d6a0a6f PCI: Add pci_regi... |
2865 2866 2867 2868 |
list_splice_init(resources, &bridge->windows); bridge->sysdata = sysdata; bridge->busnr = bus; bridge->ops = ops; |
a9d9f5276 PCI: show host br... |
2869 |
|
37d6a0a6f PCI: Add pci_regi... |
2870 2871 2872 |
error = pci_register_host_bridge(bridge); if (error < 0) goto err_out; |
a5390aa6d PCI: don't publis... |
2873 |
|
37d6a0a6f PCI: Add pci_regi... |
2874 |
return bridge->bus; |
1da177e4c Linux-2.6.12-rc2 |
2875 |
|
1da177e4c Linux-2.6.12-rc2 |
2876 |
err_out: |
9885440b1 PCI: Fix pci_host... |
2877 |
put_device(&bridge->dev); |
1da177e4c Linux-2.6.12-rc2 |
2878 2879 |
return NULL; } |
e6b29deaf PCI: Export symbo... |
2880 |
EXPORT_SYMBOL_GPL(pci_create_root_bus); |
cdb9b9f73 [PATCH] PCI: Smal... |
2881 |
|
49b8e3f3e PCI: Add generic ... |
2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 |
int pci_host_probe(struct pci_host_bridge *bridge) { struct pci_bus *bus, *child; int ret; ret = pci_scan_root_bus_bridge(bridge); if (ret < 0) { dev_err(bridge->dev.parent, "Scanning root bridge failed"); return ret; } bus = bridge->bus; /* * We insert PCI resources into the iomem_resource and * ioport_resource trees in either pci_bus_claim_resources() * or pci_bus_assign_resources(). */ if (pci_has_flag(PCI_PROBE_ONLY)) { pci_bus_claim_resources(bus); } else { pci_bus_size_bridges(bus); pci_bus_assign_resources(bus); list_for_each_entry(child, &bus->children, node) pcie_bus_configure_settings(child); } pci_bus_add_devices(bus); return 0; } EXPORT_SYMBOL_GPL(pci_host_probe); |
98a358310 PCI: add busn_res... |
2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 |
int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int bus_max) { struct resource *res = &b->busn_res; struct resource *parent_res, *conflict; res->start = bus; res->end = bus_max; res->flags = IORESOURCE_BUS; if (!pci_is_root_bus(b)) parent_res = &b->parent->busn_res; else { parent_res = get_pci_domain_busn_res(pci_domain_nr(b)); res->flags |= IORESOURCE_PCI_FIXED; } |
ced04d155 PCI: Use request_... |
2929 |
conflict = request_resource_conflict(parent_res, res); |
98a358310 PCI: add busn_res... |
2930 2931 |
if (conflict) |
34c6b7105 PCI: Replace dev_... |
2932 |
dev_info(&b->dev, |
98a358310 PCI: add busn_res... |
2933 2934 2935 2936 |
"busn_res: can not insert %pR under %s%pR (conflicts with %s %pR) ", res, pci_is_root_bus(b) ? "domain " : "", parent_res, conflict->name, conflict); |
98a358310 PCI: add busn_res... |
2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 |
return conflict == NULL; } int pci_bus_update_busn_res_end(struct pci_bus *b, int bus_max) { struct resource *res = &b->busn_res; struct resource old_res = *res; resource_size_t size; int ret; if (res->start > bus_max) return -EINVAL; size = bus_max - res->start + 1; ret = adjust_resource(res, res->start, size); |
34c6b7105 PCI: Replace dev_... |
2953 2954 |
dev_info(&b->dev, "busn_res: %pR end %s updated to %02x ", |
98a358310 PCI: add busn_res... |
2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 |
&old_res, ret ? "can not be" : "is", bus_max); if (!ret && !res->parent) pci_bus_insert_busn_res(b, res->start, res->end); return ret; } void pci_bus_release_busn_res(struct pci_bus *b) { struct resource *res = &b->busn_res; int ret; if (!res->flags || !res->parent) return; ret = release_resource(res); |
34c6b7105 PCI: Replace dev_... |
2972 2973 |
dev_info(&b->dev, "busn_res: %pR %s released ", |
98a358310 PCI: add busn_res... |
2974 2975 |
res, ret ? "can not be" : "is"); } |
1228c4b6c PCI: Add pci_scan... |
2976 |
int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge) |
a2ebb8279 PCI: add pci_scan... |
2977 |
{ |
14d76b68f PCI: Use common r... |
2978 |
struct resource_entry *window; |
4d99f5242 PCI: checking bus... |
2979 |
bool found = false; |
a2ebb8279 PCI: add pci_scan... |
2980 |
struct pci_bus *b; |
1228c4b6c PCI: Add pci_scan... |
2981 |
int max, bus, ret; |
4d99f5242 PCI: checking bus... |
2982 |
|
1228c4b6c PCI: Add pci_scan... |
2983 2984 2985 2986 |
if (!bridge) return -EINVAL; resource_list_for_each_entry(window, &bridge->windows) |
4d99f5242 PCI: checking bus... |
2987 |
if (window->res->flags & IORESOURCE_BUS) { |
4f5c883d7 PCI: Move setting... |
2988 |
bridge->busnr = window->res->start; |
4d99f5242 PCI: checking bus... |
2989 2990 2991 |
found = true; break; } |
a2ebb8279 PCI: add pci_scan... |
2992 |
|
1228c4b6c PCI: Add pci_scan... |
2993 2994 2995 2996 2997 2998 |
ret = pci_register_host_bridge(bridge); if (ret < 0) return ret; b = bridge->bus; bus = bridge->busnr; |
a2ebb8279 PCI: add pci_scan... |
2999 |
|
4d99f5242 PCI: checking bus... |
3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 |
if (!found) { dev_info(&b->dev, "No busn resource found for root bus, will use [bus %02x-ff] ", bus); pci_bus_insert_busn_res(b, bus, 255); } max = pci_scan_child_bus(b); if (!found) pci_bus_update_busn_res_end(b, max); |
1228c4b6c PCI: Add pci_scan... |
3012 |
return 0; |
a2ebb8279 PCI: add pci_scan... |
3013 |
} |
1228c4b6c PCI: Add pci_scan... |
3014 |
EXPORT_SYMBOL(pci_scan_root_bus_bridge); |
d2a7926d4 PCI: Add pci_scan... |
3015 3016 3017 3018 |
struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata, struct list_head *resources) { |
14d76b68f PCI: Use common r... |
3019 |
struct resource_entry *window; |
4d99f5242 PCI: checking bus... |
3020 |
bool found = false; |
a2ebb8279 PCI: add pci_scan... |
3021 |
struct pci_bus *b; |
4d99f5242 PCI: checking bus... |
3022 |
int max; |
14d76b68f PCI: Use common r... |
3023 |
resource_list_for_each_entry(window, resources) |
4d99f5242 PCI: checking bus... |
3024 3025 3026 3027 |
if (window->res->flags & IORESOURCE_BUS) { found = true; break; } |
a2ebb8279 PCI: add pci_scan... |
3028 |
|
9ee8a1c4a PCI: Remove pci_s... |
3029 |
b = pci_create_root_bus(parent, bus, ops, sysdata, resources); |
a2ebb8279 PCI: add pci_scan... |
3030 3031 |
if (!b) return NULL; |
4d99f5242 PCI: checking bus... |
3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 |
if (!found) { dev_info(&b->dev, "No busn resource found for root bus, will use [bus %02x-ff] ", bus); pci_bus_insert_busn_res(b, bus, 255); } max = pci_scan_child_bus(b); if (!found) pci_bus_update_busn_res_end(b, max); |
a2ebb8279 PCI: add pci_scan... |
3044 |
return b; |
d2a7926d4 PCI: Add pci_scan... |
3045 |
} |
a2ebb8279 PCI: add pci_scan... |
3046 |
EXPORT_SYMBOL(pci_scan_root_bus); |
15856ad50 PCI: Remove __dev... |
3047 |
struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, |
de4b2f76d PCI: convert pci_... |
3048 3049 3050 3051 3052 3053 3054 |
void *sysdata) { LIST_HEAD(resources); struct pci_bus *b; pci_add_resource(&resources, &ioport_resource); pci_add_resource(&resources, &iomem_resource); |
857c3b668 PCI: add default ... |
3055 |
pci_add_resource(&resources, &busn_resource); |
de4b2f76d PCI: convert pci_... |
3056 3057 |
b = pci_create_root_bus(NULL, bus, ops, sysdata, &resources); if (b) { |
857c3b668 PCI: add default ... |
3058 |
pci_scan_child_bus(b); |
de4b2f76d PCI: convert pci_... |
3059 3060 3061 3062 3063 3064 |
} else { pci_free_resource_list(&resources); } return b; } EXPORT_SYMBOL(pci_scan_bus); |
3ed4fd96b PCI: Introduce pc... |
3065 |
/** |
3e466e2d3 PCI: Tidy up pci/... |
3066 |
* pci_rescan_bus_bridge_resize - Scan a PCI bus for devices |
2f320521a PCI: Make rescan ... |
3067 3068 3069 3070 3071 3072 3073 3074 3075 |
* @bridge: PCI bridge for the bus to scan * * Scan a PCI bus and child buses for new devices, add them, * and enable them, resizing bridge mmio/io resource if necessary * and possible. The caller must ensure the child devices are already * removed for resizing to occur. * * Returns the max number of subordinate bus discovered. */ |
10874f5a0 PCI: Remove unnec... |
3076 |
unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge) |
2f320521a PCI: Make rescan ... |
3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 |
{ unsigned int max; struct pci_bus *bus = bridge->subordinate; max = pci_scan_child_bus(bus); pci_assign_unassigned_bridge_resources(bridge); pci_bus_add_devices(bus); return max; } |
a5213a319 PCI: Move pci_res... |
3089 |
/** |
3e466e2d3 PCI: Tidy up pci/... |
3090 |
* pci_rescan_bus - Scan a PCI bus for devices |
a5213a319 PCI: Move pci_res... |
3091 3092 |
* @bus: PCI bus to scan * |
3e466e2d3 PCI: Tidy up pci/... |
3093 3094 |
* Scan a PCI bus and child buses for new devices, add them, * and enable them. |
a5213a319 PCI: Move pci_res... |
3095 3096 3097 |
* * Returns the max number of subordinate bus discovered. */ |
10874f5a0 PCI: Remove unnec... |
3098 |
unsigned int pci_rescan_bus(struct pci_bus *bus) |
a5213a319 PCI: Move pci_res... |
3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 |
{ unsigned int max; max = pci_scan_child_bus(bus); pci_assign_unassigned_bus_resources(bus); pci_bus_add_devices(bus); return max; } EXPORT_SYMBOL_GPL(pci_rescan_bus); |
9d16947b7 PCI: Add global p... |
3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 |
/* * pci_rescan_bus(), pci_rescan_bus_bridge_resize() and PCI device removal * routines should always be executed under this mutex. */ static DEFINE_MUTEX(pci_rescan_remove_lock); void pci_lock_rescan_remove(void) { mutex_lock(&pci_rescan_remove_lock); } EXPORT_SYMBOL_GPL(pci_lock_rescan_remove); void pci_unlock_rescan_remove(void) { mutex_unlock(&pci_rescan_remove_lock); } EXPORT_SYMBOL_GPL(pci_unlock_rescan_remove); |
3c78bc61f PCI: Whitespace c... |
3126 3127 |
static int __init pci_sort_bf_cmp(const struct device *d_a, const struct device *d_b) |
6b4b78fed PCI: optionally s... |
3128 |
{ |
99178b036 Driver core: add ... |
3129 3130 |
const struct pci_dev *a = to_pci_dev(d_a); const struct pci_dev *b = to_pci_dev(d_b); |
6b4b78fed PCI: optionally s... |
3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 |
if (pci_domain_nr(a->bus) < pci_domain_nr(b->bus)) return -1; else if (pci_domain_nr(a->bus) > pci_domain_nr(b->bus)) return 1; if (a->bus->number < b->bus->number) return -1; else if (a->bus->number > b->bus->number) return 1; if (a->devfn < b->devfn) return -1; else if (a->devfn > b->devfn) return 1; return 0; } |
5ff580c10 PCI: remove globa... |
3142 |
void __init pci_sort_breadthfirst(void) |
6b4b78fed PCI: optionally s... |
3143 |
{ |
99178b036 Driver core: add ... |
3144 |
bus_sort_breadthfirst(&pci_bus_type, &pci_sort_bf_cmp); |
6b4b78fed PCI: optionally s... |
3145 |
} |
95e3ba977 PCI: Move pci_hp_... |
3146 3147 3148 3149 |
int pci_hp_add_bridge(struct pci_dev *dev) { struct pci_bus *parent = dev->bus; |
4147c2fd9 PCI: Open-code th... |
3150 |
int busnr, start = parent->busn_res.start; |
1c02ea810 PCI: Distribute a... |
3151 |
unsigned int available_buses = 0; |
95e3ba977 PCI: Move pci_hp_... |
3152 3153 3154 3155 3156 3157 3158 |
int end = parent->busn_res.end; for (busnr = start; busnr <= end; busnr++) { if (!pci_find_bus(pci_domain_nr(parent), busnr)) break; } if (busnr-- > end) { |
7506dc798 PCI: Add wrappers... |
3159 3160 |
pci_err(dev, "No bus number available for hot-added bridge "); |
95e3ba977 PCI: Move pci_hp_... |
3161 3162 |
return -1; } |
4147c2fd9 PCI: Open-code th... |
3163 3164 3165 |
/* Scan bridges that are already configured */ busnr = pci_scan_bridge(parent, dev, busnr, 0); |
1c02ea810 PCI: Distribute a... |
3166 3167 3168 3169 3170 |
/* * Distribute the available bus numbers between hotplug-capable * bridges to make extending the chain later possible. */ available_buses = end - busnr; |
4147c2fd9 PCI: Open-code th... |
3171 |
/* Scan bridges that need to be reconfigured */ |
1c02ea810 PCI: Distribute a... |
3172 |
pci_scan_bridge_extend(parent, dev, busnr, available_buses, 1); |
4147c2fd9 PCI: Open-code th... |
3173 |
|
95e3ba977 PCI: Move pci_hp_... |
3174 3175 3176 3177 3178 3179 |
if (!dev->subordinate) return -1; return 0; } EXPORT_SYMBOL_GPL(pci_hp_add_bridge); |