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balloon: Make functions, local vars static
[qemu.git] / hw / pci.c
blobb904a4ecb63d1730f750cd2d6722fa316f9ad1bd
1 /*
2 * QEMU PCI bus manager
3 *
4 * Copyright (c) 2004 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24 #include "hw.h"
25 #include "pci.h"
26 #include "pci_bridge.h"
27 #include "pci_internals.h"
28 #include "monitor.h"
29 #include "net.h"
30 #include "sysemu.h"
31 #include "loader.h"
32 #include "qemu-objects.h"
33 #include "range.h"
34
35 //#define DEBUG_PCI
36 #ifdef DEBUG_PCI
37 # define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
38 #else
39 # define PCI_DPRINTF(format, ...) do { } while (0)
40 #endif
41
42 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent);
43 static char *pcibus_get_dev_path(DeviceState *dev);
44 static char *pcibus_get_fw_dev_path(DeviceState *dev);
45 static int pcibus_reset(BusState *qbus);
46
47 struct BusInfo pci_bus_info = {
48 .name = "PCI",
49 .size = sizeof(PCIBus),
50 .print_dev = pcibus_dev_print,
51 .get_dev_path = pcibus_get_dev_path,
52 .get_fw_dev_path = pcibus_get_fw_dev_path,
53 .reset = pcibus_reset,
54 .props = (Property[]) {
55 DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1),
56 DEFINE_PROP_STRING("romfile", PCIDevice, romfile),
57 DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1),
58 DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present,
59 QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false),
60 DEFINE_PROP_BIT("command_serr_enable", PCIDevice, cap_present,
61 QEMU_PCI_CAP_SERR_BITNR, true),
62 DEFINE_PROP_END_OF_LIST()
63 }
64 };
65
66 static void pci_update_mappings(PCIDevice *d);
67 static void pci_set_irq(void *opaque, int irq_num, int level);
68 static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom);
69 static void pci_del_option_rom(PCIDevice *pdev);
70
71 static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET;
72 static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU;
73
74 struct PCIHostBus {
75 int domain;
76 struct PCIBus *bus;
77 QLIST_ENTRY(PCIHostBus) next;
78 };
79 static QLIST_HEAD(, PCIHostBus) host_buses;
80
81 static const VMStateDescription vmstate_pcibus = {
82 .name = "PCIBUS",
83 .version_id = 1,
84 .minimum_version_id = 1,
85 .minimum_version_id_old = 1,
86 .fields = (VMStateField []) {
87 VMSTATE_INT32_EQUAL(nirq, PCIBus),
88 VMSTATE_VARRAY_INT32(irq_count, PCIBus, nirq, 0, vmstate_info_int32, int32_t),
89 VMSTATE_END_OF_LIST()
90 }
91 };
92
93 static int pci_bar(PCIDevice *d, int reg)
94 {
95 uint8_t type;
96
97 if (reg != PCI_ROM_SLOT)
98 return PCI_BASE_ADDRESS_0 + reg * 4;
99
100 type = d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
101 return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS;
102 }
103
104 static inline int pci_irq_state(PCIDevice *d, int irq_num)
105 {
106 return (d->irq_state >> irq_num) & 0x1;
107 }
108
109 static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level)
110 {
111 d->irq_state &= ~(0x1 << irq_num);
112 d->irq_state |= level << irq_num;
113 }
114
115 static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change)
116 {
117 PCIBus *bus;
118 for (;;) {
119 bus = pci_dev->bus;
120 irq_num = bus->map_irq(pci_dev, irq_num);
121 if (bus->set_irq)
122 break;
123 pci_dev = bus->parent_dev;
124 }
125 bus->irq_count[irq_num] += change;
126 bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
127 }
128
129 int pci_bus_get_irq_level(PCIBus *bus, int irq_num)
130 {
131 assert(irq_num >= 0);
132 assert(irq_num < bus->nirq);
133 return !!bus->irq_count[irq_num];
134 }
135
136 /* Update interrupt status bit in config space on interrupt
137 * state change. */
138 static void pci_update_irq_status(PCIDevice *dev)
139 {
140 if (dev->irq_state) {
141 dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT;
142 } else {
143 dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
144 }
145 }
146
147 void pci_device_deassert_intx(PCIDevice *dev)
148 {
149 int i;
150 for (i = 0; i < PCI_NUM_PINS; ++i) {
151 qemu_set_irq(dev->irq[i], 0);
152 }
153 }
154
155 /*
156 * This function is called on #RST and FLR.
157 * FLR if PCI_EXP_DEVCTL_BCR_FLR is set
158 */
159 void pci_device_reset(PCIDevice *dev)
160 {
161 int r;
162 /* TODO: call the below unconditionally once all pci devices
163 * are qdevified */
164 if (dev->qdev.info) {
165 qdev_reset_all(&dev->qdev);
166 }
167
168 dev->irq_state = 0;
169 pci_update_irq_status(dev);
170 pci_device_deassert_intx(dev);
171 /* Clear all writable bits */
172 pci_word_test_and_clear_mask(dev->config + PCI_COMMAND,
173 pci_get_word(dev->wmask + PCI_COMMAND) |
174 pci_get_word(dev->w1cmask + PCI_COMMAND));
175 pci_word_test_and_clear_mask(dev->config + PCI_STATUS,
176 pci_get_word(dev->wmask + PCI_STATUS) |
177 pci_get_word(dev->w1cmask + PCI_STATUS));
178 dev->config[PCI_CACHE_LINE_SIZE] = 0x0;
179 dev->config[PCI_INTERRUPT_LINE] = 0x0;
180 for (r = 0; r < PCI_NUM_REGIONS; ++r) {
181 PCIIORegion *region = &dev->io_regions[r];
182 if (!region->size) {
183 continue;
184 }
185
186 if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) &&
187 region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
188 pci_set_quad(dev->config + pci_bar(dev, r), region->type);
189 } else {
190 pci_set_long(dev->config + pci_bar(dev, r), region->type);
191 }
192 }
193 pci_update_mappings(dev);
194 }
195
196 /*
197 * Trigger pci bus reset under a given bus.
198 * To be called on RST# assert.
199 */
200 void pci_bus_reset(PCIBus *bus)
201 {
202 int i;
203
204 for (i = 0; i < bus->nirq; i++) {
205 bus->irq_count[i] = 0;
206 }
207 for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) {
208 if (bus->devices[i]) {
209 pci_device_reset(bus->devices[i]);
210 }
211 }
212 }
213
214 static int pcibus_reset(BusState *qbus)
215 {
216 pci_bus_reset(DO_UPCAST(PCIBus, qbus, qbus));
217
218 /* topology traverse is done by pci_bus_reset().
219 Tell qbus/qdev walker not to traverse the tree */
220 return 1;
221 }
222
223 static void pci_host_bus_register(int domain, PCIBus *bus)
224 {
225 struct PCIHostBus *host;
226 host = qemu_mallocz(sizeof(*host));
227 host->domain = domain;
228 host->bus = bus;
229 QLIST_INSERT_HEAD(&host_buses, host, next);
230 }
231
232 PCIBus *pci_find_root_bus(int domain)
233 {
234 struct PCIHostBus *host;
235
236 QLIST_FOREACH(host, &host_buses, next) {
237 if (host->domain == domain) {
238 return host->bus;
239 }
240 }
241
242 return NULL;
243 }
244
245 int pci_find_domain(const PCIBus *bus)
246 {
247 PCIDevice *d;
248 struct PCIHostBus *host;
249
250 /* obtain root bus */
251 while ((d = bus->parent_dev) != NULL) {
252 bus = d->bus;
253 }
254
255 QLIST_FOREACH(host, &host_buses, next) {
256 if (host->bus == bus) {
257 return host->domain;
258 }
259 }
260
261 abort(); /* should not be reached */
262 return -1;
263 }
264
265 void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
266 const char *name, uint8_t devfn_min)
267 {
268 qbus_create_inplace(&bus->qbus, &pci_bus_info, parent, name);
269 assert(PCI_FUNC(devfn_min) == 0);
270 bus->devfn_min = devfn_min;
271
272 /* host bridge */
273 QLIST_INIT(&bus->child);
274 pci_host_bus_register(0, bus); /* for now only pci domain 0 is supported */
275
276 vmstate_register(NULL, -1, &vmstate_pcibus, bus);
277 }
278
279 PCIBus *pci_bus_new(DeviceState *parent, const char *name, uint8_t devfn_min)
280 {
281 PCIBus *bus;
282
283 bus = qemu_mallocz(sizeof(*bus));
284 bus->qbus.qdev_allocated = 1;
285 pci_bus_new_inplace(bus, parent, name, devfn_min);
286 return bus;
287 }
288
289 void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
290 void *irq_opaque, int nirq)
291 {
292 bus->set_irq = set_irq;
293 bus->map_irq = map_irq;
294 bus->irq_opaque = irq_opaque;
295 bus->nirq = nirq;
296 bus->irq_count = qemu_mallocz(nirq * sizeof(bus->irq_count[0]));
297 }
298
299 void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug, DeviceState *qdev)
300 {
301 bus->qbus.allow_hotplug = 1;
302 bus->hotplug = hotplug;
303 bus->hotplug_qdev = qdev;
304 }
305
306 void pci_bus_set_mem_base(PCIBus *bus, target_phys_addr_t base)
307 {
308 bus->mem_base = base;
309 }
310
311 PCIBus *pci_register_bus(DeviceState *parent, const char *name,
312 pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
313 void *irq_opaque, uint8_t devfn_min, int nirq)
314 {
315 PCIBus *bus;
316
317 bus = pci_bus_new(parent, name, devfn_min);
318 pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq);
319 return bus;
320 }
321
322 int pci_bus_num(PCIBus *s)
323 {
324 if (!s->parent_dev)
325 return 0; /* pci host bridge */
326 return s->parent_dev->config[PCI_SECONDARY_BUS];
327 }
328
329 static int get_pci_config_device(QEMUFile *f, void *pv, size_t size)
330 {
331 PCIDevice *s = container_of(pv, PCIDevice, config);
332 uint8_t *config;
333 int i;
334
335 assert(size == pci_config_size(s));
336 config = qemu_malloc(size);
337
338 qemu_get_buffer(f, config, size);
339 for (i = 0; i < size; ++i) {
340 if ((config[i] ^ s->config[i]) &
341 s->cmask[i] & ~s->wmask[i] & ~s->w1cmask[i]) {
342 qemu_free(config);
343 return -EINVAL;
344 }
345 }
346 memcpy(s->config, config, size);
347
348 pci_update_mappings(s);
349
350 qemu_free(config);
351 return 0;
352 }
353
354 /* just put buffer */
355 static void put_pci_config_device(QEMUFile *f, void *pv, size_t size)
356 {
357 const uint8_t **v = pv;
358 assert(size == pci_config_size(container_of(pv, PCIDevice, config)));
359 qemu_put_buffer(f, *v, size);
360 }
361
362 static VMStateInfo vmstate_info_pci_config = {
363 .name = "pci config",
364 .get = get_pci_config_device,
365 .put = put_pci_config_device,
366 };
367
368 static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size)
369 {
370 PCIDevice *s = container_of(pv, PCIDevice, irq_state);
371 uint32_t irq_state[PCI_NUM_PINS];
372 int i;
373 for (i = 0; i < PCI_NUM_PINS; ++i) {
374 irq_state[i] = qemu_get_be32(f);
375 if (irq_state[i] != 0x1 && irq_state[i] != 0) {
376 fprintf(stderr, "irq state %d: must be 0 or 1.\n",
377 irq_state[i]);
378 return -EINVAL;
379 }
380 }
381
382 for (i = 0; i < PCI_NUM_PINS; ++i) {
383 pci_set_irq_state(s, i, irq_state[i]);
384 }
385
386 return 0;
387 }
388
389 static void put_pci_irq_state(QEMUFile *f, void *pv, size_t size)
390 {
391 int i;
392 PCIDevice *s = container_of(pv, PCIDevice, irq_state);
393
394 for (i = 0; i < PCI_NUM_PINS; ++i) {
395 qemu_put_be32(f, pci_irq_state(s, i));
396 }
397 }
398
399 static VMStateInfo vmstate_info_pci_irq_state = {
400 .name = "pci irq state",
401 .get = get_pci_irq_state,
402 .put = put_pci_irq_state,
403 };
404
405 const VMStateDescription vmstate_pci_device = {
406 .name = "PCIDevice",
407 .version_id = 2,
408 .minimum_version_id = 1,
409 .minimum_version_id_old = 1,
410 .fields = (VMStateField []) {
411 VMSTATE_INT32_LE(version_id, PCIDevice),
412 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
413 vmstate_info_pci_config,
414 PCI_CONFIG_SPACE_SIZE),
415 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
416 vmstate_info_pci_irq_state,
417 PCI_NUM_PINS * sizeof(int32_t)),
418 VMSTATE_END_OF_LIST()
419 }
420 };
421
422 const VMStateDescription vmstate_pcie_device = {
423 .name = "PCIDevice",
424 .version_id = 2,
425 .minimum_version_id = 1,
426 .minimum_version_id_old = 1,
427 .fields = (VMStateField []) {
428 VMSTATE_INT32_LE(version_id, PCIDevice),
429 VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
430 vmstate_info_pci_config,
431 PCIE_CONFIG_SPACE_SIZE),
432 VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
433 vmstate_info_pci_irq_state,
434 PCI_NUM_PINS * sizeof(int32_t)),
435 VMSTATE_END_OF_LIST()
436 }
437 };
438
439 static inline const VMStateDescription *pci_get_vmstate(PCIDevice *s)
440 {
441 return pci_is_express(s) ? &vmstate_pcie_device : &vmstate_pci_device;
442 }
443
444 void pci_device_save(PCIDevice *s, QEMUFile *f)
445 {
446 /* Clear interrupt status bit: it is implicit
447 * in irq_state which we are saving.
448 * This makes us compatible with old devices
449 * which never set or clear this bit. */
450 s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
451 vmstate_save_state(f, pci_get_vmstate(s), s);
452 /* Restore the interrupt status bit. */
453 pci_update_irq_status(s);
454 }
455
456 int pci_device_load(PCIDevice *s, QEMUFile *f)
457 {
458 int ret;
459 ret = vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id);
460 /* Restore the interrupt status bit. */
461 pci_update_irq_status(s);
462 return ret;
463 }
464
465 static void pci_set_default_subsystem_id(PCIDevice *pci_dev)
466 {
467 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID,
468 pci_default_sub_vendor_id);
469 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID,
470 pci_default_sub_device_id);
471 }
472
473 /*
474 * Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL
475 * [[<domain>:]<bus>:]<slot>.<func>, return -1 on error
476 */
477 int pci_parse_devaddr(const char *addr, int *domp, int *busp,
478 unsigned int *slotp, unsigned int *funcp)
479 {
480 const char *p;
481 char *e;
482 unsigned long val;
483 unsigned long dom = 0, bus = 0;
484 unsigned int slot = 0;
485 unsigned int func = 0;
486
487 p = addr;
488 val = strtoul(p, &e, 16);
489 if (e == p)
490 return -1;
491 if (*e == ':') {
492 bus = val;
493 p = e + 1;
494 val = strtoul(p, &e, 16);
495 if (e == p)
496 return -1;
497 if (*e == ':') {
498 dom = bus;
499 bus = val;
500 p = e + 1;
501 val = strtoul(p, &e, 16);
502 if (e == p)
503 return -1;
504 }
505 }
506
507 slot = val;
508
509 if (funcp != NULL) {
510 if (*e != '.')
511 return -1;
512
513 p = e + 1;
514 val = strtoul(p, &e, 16);
515 if (e == p)
516 return -1;
517
518 func = val;
519 }
520
521 /* if funcp == NULL func is 0 */
522 if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7)
523 return -1;
524
525 if (*e)
526 return -1;
527
528 /* Note: QEMU doesn't implement domains other than 0 */
529 if (!pci_find_bus(pci_find_root_bus(dom), bus))
530 return -1;
531
532 *domp = dom;
533 *busp = bus;
534 *slotp = slot;
535 if (funcp != NULL)
536 *funcp = func;
537 return 0;
538 }
539
540 int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, int *busp,
541 unsigned *slotp)
542 {
543 /* strip legacy tag */
544 if (!strncmp(addr, "pci_addr=", 9)) {
545 addr += 9;
546 }
547 if (pci_parse_devaddr(addr, domp, busp, slotp, NULL)) {
548 monitor_printf(mon, "Invalid pci address\n");
549 return -1;
550 }
551 return 0;
552 }
553
554 PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr)
555 {
556 int dom, bus;
557 unsigned slot;
558
559 if (!devaddr) {
560 *devfnp = -1;
561 return pci_find_bus(pci_find_root_bus(0), 0);
562 }
563
564 if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) {
565 return NULL;
566 }
567
568 *devfnp = PCI_DEVFN(slot, 0);
569 return pci_find_bus(pci_find_root_bus(dom), bus);
570 }
571
572 static void pci_init_cmask(PCIDevice *dev)
573 {
574 pci_set_word(dev->cmask + PCI_VENDOR_ID, 0xffff);
575 pci_set_word(dev->cmask + PCI_DEVICE_ID, 0xffff);
576 dev->cmask[PCI_STATUS] = PCI_STATUS_CAP_LIST;
577 dev->cmask[PCI_REVISION_ID] = 0xff;
578 dev->cmask[PCI_CLASS_PROG] = 0xff;
579 pci_set_word(dev->cmask + PCI_CLASS_DEVICE, 0xffff);
580 dev->cmask[PCI_HEADER_TYPE] = 0xff;
581 dev->cmask[PCI_CAPABILITY_LIST] = 0xff;
582 }
583
584 static void pci_init_wmask(PCIDevice *dev)
585 {
586 int config_size = pci_config_size(dev);
587
588 dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff;
589 dev->wmask[PCI_INTERRUPT_LINE] = 0xff;
590 pci_set_word(dev->wmask + PCI_COMMAND,
591 PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
592 PCI_COMMAND_INTX_DISABLE);
593 if (dev->cap_present & QEMU_PCI_CAP_SERR) {
594 pci_word_test_and_set_mask(dev->wmask + PCI_COMMAND, PCI_COMMAND_SERR);
595 }
596
597 memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff,
598 config_size - PCI_CONFIG_HEADER_SIZE);
599 }
600
601 static void pci_init_w1cmask(PCIDevice *dev)
602 {
603 /*
604 * Note: It's okay to set w1cmask even for readonly bits as
605 * long as their value is hardwired to 0.
606 */
607 pci_set_word(dev->w1cmask + PCI_STATUS,
608 PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT |
609 PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT |
610 PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY);
611 }
612
613 static void pci_init_wmask_bridge(PCIDevice *d)
614 {
615 /* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and
616 PCI_SEC_LETENCY_TIMER */
617 memset(d->wmask + PCI_PRIMARY_BUS, 0xff, 4);
618
619 /* base and limit */
620 d->wmask[PCI_IO_BASE] = PCI_IO_RANGE_MASK & 0xff;
621 d->wmask[PCI_IO_LIMIT] = PCI_IO_RANGE_MASK & 0xff;
622 pci_set_word(d->wmask + PCI_MEMORY_BASE,
623 PCI_MEMORY_RANGE_MASK & 0xffff);
624 pci_set_word(d->wmask + PCI_MEMORY_LIMIT,
625 PCI_MEMORY_RANGE_MASK & 0xffff);
626 pci_set_word(d->wmask + PCI_PREF_MEMORY_BASE,
627 PCI_PREF_RANGE_MASK & 0xffff);
628 pci_set_word(d->wmask + PCI_PREF_MEMORY_LIMIT,
629 PCI_PREF_RANGE_MASK & 0xffff);
630
631 /* PCI_PREF_BASE_UPPER32 and PCI_PREF_LIMIT_UPPER32 */
632 memset(d->wmask + PCI_PREF_BASE_UPPER32, 0xff, 8);
633
634 /* TODO: add this define to pci_regs.h in linux and then in qemu. */
635 #define PCI_BRIDGE_CTL_VGA_16BIT 0x10 /* VGA 16-bit decode */
636 #define PCI_BRIDGE_CTL_DISCARD 0x100 /* Primary discard timer */
637 #define PCI_BRIDGE_CTL_SEC_DISCARD 0x200 /* Secondary discard timer */
638 #define PCI_BRIDGE_CTL_DISCARD_STATUS 0x400 /* Discard timer status */
639 #define PCI_BRIDGE_CTL_DISCARD_SERR 0x800 /* Discard timer SERR# enable */
640 pci_set_word(d->wmask + PCI_BRIDGE_CONTROL,
641 PCI_BRIDGE_CTL_PARITY |
642 PCI_BRIDGE_CTL_SERR |
643 PCI_BRIDGE_CTL_ISA |
644 PCI_BRIDGE_CTL_VGA |
645 PCI_BRIDGE_CTL_VGA_16BIT |
646 PCI_BRIDGE_CTL_MASTER_ABORT |
647 PCI_BRIDGE_CTL_BUS_RESET |
648 PCI_BRIDGE_CTL_FAST_BACK |
649 PCI_BRIDGE_CTL_DISCARD |
650 PCI_BRIDGE_CTL_SEC_DISCARD |
651 PCI_BRIDGE_CTL_DISCARD_SERR);
652 /* Below does not do anything as we never set this bit, put here for
653 * completeness. */
654 pci_set_word(d->w1cmask + PCI_BRIDGE_CONTROL,
655 PCI_BRIDGE_CTL_DISCARD_STATUS);
656 }
657
658 static int pci_init_multifunction(PCIBus *bus, PCIDevice *dev)
659 {
660 uint8_t slot = PCI_SLOT(dev->devfn);
661 uint8_t func;
662
663 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
664 dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
665 }
666
667 /*
668 * multifunction bit is interpreted in two ways as follows.
669 * - all functions must set the bit to 1.
670 * Example: Intel X53
671 * - function 0 must set the bit, but the rest function (> 0)
672 * is allowed to leave the bit to 0.
673 * Example: PIIX3(also in qemu), PIIX4(also in qemu), ICH10,
674 *
675 * So OS (at least Linux) checks the bit of only function 0,
676 * and doesn't see the bit of function > 0.
677 *
678 * The below check allows both interpretation.
679 */
680 if (PCI_FUNC(dev->devfn)) {
681 PCIDevice *f0 = bus->devices[PCI_DEVFN(slot, 0)];
682 if (f0 && !(f0->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) {
683 /* function 0 should set multifunction bit */
684 error_report("PCI: single function device can't be populated "
685 "in function %x.%x", slot, PCI_FUNC(dev->devfn));
686 return -1;
687 }
688 return 0;
689 }
690
691 if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
692 return 0;
693 }
694 /* function 0 indicates single function, so function > 0 must be NULL */
695 for (func = 1; func < PCI_FUNC_MAX; ++func) {
696 if (bus->devices[PCI_DEVFN(slot, func)]) {
697 error_report("PCI: %x.0 indicates single function, "
698 "but %x.%x is already populated.",
699 slot, slot, func);
700 return -1;
701 }
702 }
703 return 0;
704 }
705
706 static void pci_config_alloc(PCIDevice *pci_dev)
707 {
708 int config_size = pci_config_size(pci_dev);
709
710 pci_dev->config = qemu_mallocz(config_size);
711 pci_dev->cmask = qemu_mallocz(config_size);
712 pci_dev->wmask = qemu_mallocz(config_size);
713 pci_dev->w1cmask = qemu_mallocz(config_size);
714 pci_dev->used = qemu_mallocz(config_size);
715 }
716
717 static void pci_config_free(PCIDevice *pci_dev)
718 {
719 qemu_free(pci_dev->config);
720 qemu_free(pci_dev->cmask);
721 qemu_free(pci_dev->wmask);
722 qemu_free(pci_dev->w1cmask);
723 qemu_free(pci_dev->used);
724 }
725
726 /* -1 for devfn means auto assign */
727 static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
728 const char *name, int devfn,
729 const PCIDeviceInfo *info)
730 {
731 PCIConfigReadFunc *config_read = info->config_read;
732 PCIConfigWriteFunc *config_write = info->config_write;
733
734 if (devfn < 0) {
735 for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices);
736 devfn += PCI_FUNC_MAX) {
737 if (!bus->devices[devfn])
738 goto found;
739 }
740 error_report("PCI: no slot/function available for %s, all in use", name);
741 return NULL;
742 found: ;
743 } else if (bus->devices[devfn]) {
744 error_report("PCI: slot %d function %d not available for %s, in use by %s",
745 PCI_SLOT(devfn), PCI_FUNC(devfn), name, bus->devices[devfn]->name);
746 return NULL;
747 }
748 pci_dev->bus = bus;
749 pci_dev->devfn = devfn;
750 pstrcpy(pci_dev->name, sizeof(pci_dev->name), name);
751 pci_dev->irq_state = 0;
752 pci_config_alloc(pci_dev);
753
754 pci_config_set_vendor_id(pci_dev->config, info->vendor_id);
755 pci_config_set_device_id(pci_dev->config, info->device_id);
756 pci_config_set_revision(pci_dev->config, info->revision);
757 pci_config_set_class(pci_dev->config, info->class_id);
758
759 if (!info->is_bridge) {
760 if (info->subsystem_vendor_id || info->subsystem_id) {
761 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID,
762 info->subsystem_vendor_id);
763 pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID,
764 info->subsystem_id);
765 } else {
766 pci_set_default_subsystem_id(pci_dev);
767 }
768 } else {
769 /* subsystem_vendor_id/subsystem_id are only for header type 0 */
770 assert(!info->subsystem_vendor_id);
771 assert(!info->subsystem_id);
772 }
773 pci_init_cmask(pci_dev);
774 pci_init_wmask(pci_dev);
775 pci_init_w1cmask(pci_dev);
776 if (info->is_bridge) {
777 pci_init_wmask_bridge(pci_dev);
778 }
779 if (pci_init_multifunction(bus, pci_dev)) {
780 pci_config_free(pci_dev);
781 return NULL;
782 }
783
784 if (!config_read)
785 config_read = pci_default_read_config;
786 if (!config_write)
787 config_write = pci_default_write_config;
788 pci_dev->config_read = config_read;
789 pci_dev->config_write = config_write;
790 bus->devices[devfn] = pci_dev;
791 pci_dev->irq = qemu_allocate_irqs(pci_set_irq, pci_dev, PCI_NUM_PINS);
792 pci_dev->version_id = 2; /* Current pci device vmstate version */
793 return pci_dev;
794 }
795
796 static void do_pci_unregister_device(PCIDevice *pci_dev)
797 {
798 qemu_free_irqs(pci_dev->irq);
799 pci_dev->bus->devices[pci_dev->devfn] = NULL;
800 pci_config_free(pci_dev);
801 }
802
803 /* TODO: obsolete. eliminate this once all pci devices are qdevifed. */
804 PCIDevice *pci_register_device(PCIBus *bus, const char *name,
805 int instance_size, int devfn,
806 PCIConfigReadFunc *config_read,
807 PCIConfigWriteFunc *config_write)
808 {
809 PCIDevice *pci_dev;
810 PCIDeviceInfo info = {
811 .config_read = config_read,
812 .config_write = config_write,
813 };
814
815 pci_dev = qemu_mallocz(instance_size);
816 pci_dev = do_pci_register_device(pci_dev, bus, name, devfn, &info);
817 if (pci_dev == NULL) {
818 hw_error("PCI: can't register device\n");
819 }
820 return pci_dev;
821 }
822
823 static target_phys_addr_t pci_to_cpu_addr(PCIBus *bus,
824 target_phys_addr_t addr)
825 {
826 return addr + bus->mem_base;
827 }
828
829 static void pci_unregister_io_regions(PCIDevice *pci_dev)
830 {
831 PCIIORegion *r;
832 int i;
833
834 for(i = 0; i < PCI_NUM_REGIONS; i++) {
835 r = &pci_dev->io_regions[i];
836 if (!r->size || r->addr == PCI_BAR_UNMAPPED)
837 continue;
838 if (r->type == PCI_BASE_ADDRESS_SPACE_IO) {
839 isa_unassign_ioport(r->addr, r->filtered_size);
840 } else {
841 cpu_register_physical_memory(pci_to_cpu_addr(pci_dev->bus,
842 r->addr),
843 r->filtered_size,
844 IO_MEM_UNASSIGNED);
845 }
846 }
847 }
848
849 static int pci_unregister_device(DeviceState *dev)
850 {
851 PCIDevice *pci_dev = DO_UPCAST(PCIDevice, qdev, dev);
852 PCIDeviceInfo *info = DO_UPCAST(PCIDeviceInfo, qdev, dev->info);
853 int ret = 0;
854
855 if (info->exit)
856 ret = info->exit(pci_dev);
857 if (ret)
858 return ret;
859
860 pci_unregister_io_regions(pci_dev);
861 pci_del_option_rom(pci_dev);
862 qemu_free(pci_dev->romfile);
863 do_pci_unregister_device(pci_dev);
864 return 0;
865 }
866
867 void pci_register_bar(PCIDevice *pci_dev, int region_num,
868 pcibus_t size, uint8_t type,
869 PCIMapIORegionFunc *map_func)
870 {
871 PCIIORegion *r;
872 uint32_t addr;
873 uint64_t wmask;
874
875 assert(region_num >= 0);
876 assert(region_num < PCI_NUM_REGIONS);
877 if (size & (size-1)) {
878 fprintf(stderr, "ERROR: PCI region size must be pow2 "
879 "type=0x%x, size=0x%"FMT_PCIBUS"\n", type, size);
880 exit(1);
881 }
882
883 r = &pci_dev->io_regions[region_num];
884 r->addr = PCI_BAR_UNMAPPED;
885 r->size = size;
886 r->filtered_size = size;
887 r->type = type;
888 r->map_func = map_func;
889 r->ram_addr = IO_MEM_UNASSIGNED;
890
891 wmask = ~(size - 1);
892 addr = pci_bar(pci_dev, region_num);
893 if (region_num == PCI_ROM_SLOT) {
894 /* ROM enable bit is writable */
895 wmask |= PCI_ROM_ADDRESS_ENABLE;
896 }
897 pci_set_long(pci_dev->config + addr, type);
898 if (!(r->type & PCI_BASE_ADDRESS_SPACE_IO) &&
899 r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
900 pci_set_quad(pci_dev->wmask + addr, wmask);
901 pci_set_quad(pci_dev->cmask + addr, ~0ULL);
902 } else {
903 pci_set_long(pci_dev->wmask + addr, wmask & 0xffffffff);
904 pci_set_long(pci_dev->cmask + addr, 0xffffffff);
905 }
906 }
907
908 static void pci_simple_bar_mapfunc(PCIDevice *pci_dev, int region_num,
909 pcibus_t addr, pcibus_t size, int type)
910 {
911 cpu_register_physical_memory(addr, size,
912 pci_dev->io_regions[region_num].ram_addr);
913 }
914
915 void pci_register_bar_simple(PCIDevice *pci_dev, int region_num,
916 pcibus_t size, uint8_t attr, ram_addr_t ram_addr)
917 {
918 pci_register_bar(pci_dev, region_num, size,
919 PCI_BASE_ADDRESS_SPACE_MEMORY | attr,
920 pci_simple_bar_mapfunc);
921 pci_dev->io_regions[region_num].ram_addr = ram_addr;
922 }
923
924 static void pci_bridge_filter(PCIDevice *d, pcibus_t *addr, pcibus_t *size,
925 uint8_t type)
926 {
927 pcibus_t base = *addr;
928 pcibus_t limit = *addr + *size - 1;
929 PCIDevice *br;
930
931 for (br = d->bus->parent_dev; br; br = br->bus->parent_dev) {
932 uint16_t cmd = pci_get_word(d->config + PCI_COMMAND);
933
934 if (type & PCI_BASE_ADDRESS_SPACE_IO) {
935 if (!(cmd & PCI_COMMAND_IO)) {
936 goto no_map;
937 }
938 } else {
939 if (!(cmd & PCI_COMMAND_MEMORY)) {
940 goto no_map;
941 }
942 }
943
944 base = MAX(base, pci_bridge_get_base(br, type));
945 limit = MIN(limit, pci_bridge_get_limit(br, type));
946 }
947
948 if (base > limit) {
949 goto no_map;
950 }
951 *addr = base;
952 *size = limit - base + 1;
953 return;
954 no_map:
955 *addr = PCI_BAR_UNMAPPED;
956 *size = 0;
957 }
958
959 static pcibus_t pci_bar_address(PCIDevice *d,
960 int reg, uint8_t type, pcibus_t size)
961 {
962 pcibus_t new_addr, last_addr;
963 int bar = pci_bar(d, reg);
964 uint16_t cmd = pci_get_word(d->config + PCI_COMMAND);
965
966 if (type & PCI_BASE_ADDRESS_SPACE_IO) {
967 if (!(cmd & PCI_COMMAND_IO)) {
968 return PCI_BAR_UNMAPPED;
969 }
970 new_addr = pci_get_long(d->config + bar) & ~(size - 1);
971 last_addr = new_addr + size - 1;
972 /* NOTE: we have only 64K ioports on PC */
973 if (last_addr <= new_addr || new_addr == 0 || last_addr > UINT16_MAX) {
974 return PCI_BAR_UNMAPPED;
975 }
976 return new_addr;
977 }
978
979 if (!(cmd & PCI_COMMAND_MEMORY)) {
980 return PCI_BAR_UNMAPPED;
981 }
982 if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
983 new_addr = pci_get_quad(d->config + bar);
984 } else {
985 new_addr = pci_get_long(d->config + bar);
986 }
987 /* the ROM slot has a specific enable bit */
988 if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) {
989 return PCI_BAR_UNMAPPED;
990 }
991 new_addr &= ~(size - 1);
992 last_addr = new_addr + size - 1;
993 /* NOTE: we do not support wrapping */
994 /* XXX: as we cannot support really dynamic
995 mappings, we handle specific values as invalid
996 mappings. */
997 if (last_addr <= new_addr || new_addr == 0 ||
998 last_addr == PCI_BAR_UNMAPPED) {
999 return PCI_BAR_UNMAPPED;
1000 }
1001
1002 /* Now pcibus_t is 64bit.
1003 * Check if 32 bit BAR wraps around explicitly.
1004 * Without this, PC ide doesn't work well.
1005 * TODO: remove this work around.
1006 */
1007 if (!(type & PCI_BASE_ADDRESS_MEM_TYPE_64) && last_addr >= UINT32_MAX) {
1008 return PCI_BAR_UNMAPPED;
1009 }
1010
1011 /*
1012 * OS is allowed to set BAR beyond its addressable
1013 * bits. For example, 32 bit OS can set 64bit bar
1014 * to >4G. Check it. TODO: we might need to support
1015 * it in the future for e.g. PAE.
1016 */
1017 if (last_addr >= TARGET_PHYS_ADDR_MAX) {
1018 return PCI_BAR_UNMAPPED;
1019 }
1020
1021 return new_addr;
1022 }
1023
1024 static void pci_update_mappings(PCIDevice *d)
1025 {
1026 PCIIORegion *r;
1027 int i;
1028 pcibus_t new_addr, filtered_size;
1029
1030 for(i = 0; i < PCI_NUM_REGIONS; i++) {
1031 r = &d->io_regions[i];
1032
1033 /* this region isn't registered */
1034 if (!r->size)
1035 continue;
1036
1037 new_addr = pci_bar_address(d, i, r->type, r->size);
1038
1039 /* bridge filtering */
1040 filtered_size = r->size;
1041 if (new_addr != PCI_BAR_UNMAPPED) {
1042 pci_bridge_filter(d, &new_addr, &filtered_size, r->type);
1043 }
1044
1045 /* This bar isn't changed */
1046 if (new_addr == r->addr && filtered_size == r->filtered_size)
1047 continue;
1048
1049 /* now do the real mapping */
1050 if (r->addr != PCI_BAR_UNMAPPED) {
1051 if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
1052 int class;
1053 /* NOTE: specific hack for IDE in PC case:
1054 only one byte must be mapped. */
1055 class = pci_get_word(d->config + PCI_CLASS_DEVICE);
1056 if (class == 0x0101 && r->size == 4) {
1057 isa_unassign_ioport(r->addr + 2, 1);
1058 } else {
1059 isa_unassign_ioport(r->addr, r->filtered_size);
1060 }
1061 } else {
1062 cpu_register_physical_memory(pci_to_cpu_addr(d->bus, r->addr),
1063 r->filtered_size,
1064 IO_MEM_UNASSIGNED);
1065 qemu_unregister_coalesced_mmio(r->addr, r->filtered_size);
1066 }
1067 }
1068 r->addr = new_addr;
1069 r->filtered_size = filtered_size;
1070 if (r->addr != PCI_BAR_UNMAPPED) {
1071 /*
1072 * TODO: currently almost all the map funcions assumes
1073 * filtered_size == size and addr & ~(size - 1) == addr.
1074 * However with bridge filtering, they aren't always true.
1075 * Teach them such cases, such that filtered_size < size and
1076 * addr & (size - 1) != 0.
1077 */
1078 if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
1079 r->map_func(d, i, r->addr, r->filtered_size, r->type);
1080 } else {
1081 r->map_func(d, i, pci_to_cpu_addr(d->bus, r->addr),
1082 r->filtered_size, r->type);
1083 }
1084 }
1085 }
1086 }
1087
1088 static inline int pci_irq_disabled(PCIDevice *d)
1089 {
1090 return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE;
1091 }
1092
1093 /* Called after interrupt disabled field update in config space,
1094 * assert/deassert interrupts if necessary.
1095 * Gets original interrupt disable bit value (before update). */
1096 static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled)
1097 {
1098 int i, disabled = pci_irq_disabled(d);
1099 if (disabled == was_irq_disabled)
1100 return;
1101 for (i = 0; i < PCI_NUM_PINS; ++i) {
1102 int state = pci_irq_state(d, i);
1103 pci_change_irq_level(d, i, disabled ? -state : state);
1104 }
1105 }
1106
1107 uint32_t pci_default_read_config(PCIDevice *d,
1108 uint32_t address, int len)
1109 {
1110 uint32_t val = 0;
1111 assert(len == 1 || len == 2 || len == 4);
1112 len = MIN(len, pci_config_size(d) - address);
1113 memcpy(&val, d->config + address, len);
1114 return le32_to_cpu(val);
1115 }
1116
1117 void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)
1118 {
1119 int i, was_irq_disabled = pci_irq_disabled(d);
1120 uint32_t config_size = pci_config_size(d);
1121
1122 for (i = 0; i < l && addr + i < config_size; val >>= 8, ++i) {
1123 uint8_t wmask = d->wmask[addr + i];
1124 uint8_t w1cmask = d->w1cmask[addr + i];
1125 assert(!(wmask & w1cmask));
1126 d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask);
1127 d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */
1128 }
1129 if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) ||
1130 ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) ||
1131 ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) ||
1132 range_covers_byte(addr, l, PCI_COMMAND))
1133 pci_update_mappings(d);
1134
1135 if (range_covers_byte(addr, l, PCI_COMMAND))
1136 pci_update_irq_disabled(d, was_irq_disabled);
1137 }
1138
1139 /***********************************************************/
1140 /* generic PCI irq support */
1141
1142 /* 0 <= irq_num <= 3. level must be 0 or 1 */
1143 static void pci_set_irq(void *opaque, int irq_num, int level)
1144 {
1145 PCIDevice *pci_dev = opaque;
1146 int change;
1147
1148 change = level - pci_irq_state(pci_dev, irq_num);
1149 if (!change)
1150 return;
1151
1152 pci_set_irq_state(pci_dev, irq_num, level);
1153 pci_update_irq_status(pci_dev);
1154 if (pci_irq_disabled(pci_dev))
1155 return;
1156 pci_change_irq_level(pci_dev, irq_num, change);
1157 }
1158
1159 /***********************************************************/
1160 /* monitor info on PCI */
1161
1162 typedef struct {
1163 uint16_t class;
1164 const char *desc;
1165 const char *fw_name;
1166 uint16_t fw_ign_bits;
1167 } pci_class_desc;
1168
1169 static const pci_class_desc pci_class_descriptions[] =
1170 {
1171 { 0x0001, "VGA controller", "display"},
1172 { 0x0100, "SCSI controller", "scsi"},
1173 { 0x0101, "IDE controller", "ide"},
1174 { 0x0102, "Floppy controller", "fdc"},
1175 { 0x0103, "IPI controller", "ipi"},
1176 { 0x0104, "RAID controller", "raid"},
1177 { 0x0106, "SATA controller"},
1178 { 0x0107, "SAS controller"},
1179 { 0x0180, "Storage controller"},
1180 { 0x0200, "Ethernet controller", "ethernet"},
1181 { 0x0201, "Token Ring controller", "token-ring"},
1182 { 0x0202, "FDDI controller", "fddi"},
1183 { 0x0203, "ATM controller", "atm"},
1184 { 0x0280, "Network controller"},
1185 { 0x0300, "VGA controller", "display", 0x00ff},
1186 { 0x0301, "XGA controller"},
1187 { 0x0302, "3D controller"},
1188 { 0x0380, "Display controller"},
1189 { 0x0400, "Video controller", "video"},
1190 { 0x0401, "Audio controller", "sound"},
1191 { 0x0402, "Phone"},
1192 { 0x0403, "Audio controller", "sound"},
1193 { 0x0480, "Multimedia controller"},
1194 { 0x0500, "RAM controller", "memory"},
1195 { 0x0501, "Flash controller", "flash"},
1196 { 0x0580, "Memory controller"},
1197 { 0x0600, "Host bridge", "host"},
1198 { 0x0601, "ISA bridge", "isa"},
1199 { 0x0602, "EISA bridge", "eisa"},
1200 { 0x0603, "MC bridge", "mca"},
1201 { 0x0604, "PCI bridge", "pci"},
1202 { 0x0605, "PCMCIA bridge", "pcmcia"},
1203 { 0x0606, "NUBUS bridge", "nubus"},
1204 { 0x0607, "CARDBUS bridge", "cardbus"},
1205 { 0x0608, "RACEWAY bridge"},
1206 { 0x0680, "Bridge"},
1207 { 0x0700, "Serial port", "serial"},
1208 { 0x0701, "Parallel port", "parallel"},
1209 { 0x0800, "Interrupt controller", "interrupt-controller"},
1210 { 0x0801, "DMA controller", "dma-controller"},
1211 { 0x0802, "Timer", "timer"},
1212 { 0x0803, "RTC", "rtc"},
1213 { 0x0900, "Keyboard", "keyboard"},
1214 { 0x0901, "Pen", "pen"},
1215 { 0x0902, "Mouse", "mouse"},
1216 { 0x0A00, "Dock station", "dock", 0x00ff},
1217 { 0x0B00, "i386 cpu", "cpu", 0x00ff},
1218 { 0x0c00, "Fireware contorller", "fireware"},
1219 { 0x0c01, "Access bus controller", "access-bus"},
1220 { 0x0c02, "SSA controller", "ssa"},
1221 { 0x0c03, "USB controller", "usb"},
1222 { 0x0c04, "Fibre channel controller", "fibre-channel"},
1223 { 0, NULL}
1224 };
1225
1226 static void pci_for_each_device_under_bus(PCIBus *bus,
1227 void (*fn)(PCIBus *b, PCIDevice *d))
1228 {
1229 PCIDevice *d;
1230 int devfn;
1231
1232 for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
1233 d = bus->devices[devfn];
1234 if (d) {
1235 fn(bus, d);
1236 }
1237 }
1238 }
1239
1240 void pci_for_each_device(PCIBus *bus, int bus_num,
1241 void (*fn)(PCIBus *b, PCIDevice *d))
1242 {
1243 bus = pci_find_bus(bus, bus_num);
1244
1245 if (bus) {
1246 pci_for_each_device_under_bus(bus, fn);
1247 }
1248 }
1249
1250 static void pci_device_print(Monitor *mon, QDict *device)
1251 {
1252 QDict *qdict;
1253 QListEntry *entry;
1254 uint64_t addr, size;
1255
1256 monitor_printf(mon, " Bus %2" PRId64 ", ", qdict_get_int(device, "bus"));
1257 monitor_printf(mon, "device %3" PRId64 ", function %" PRId64 ":\n",
1258 qdict_get_int(device, "slot"),
1259 qdict_get_int(device, "function"));
1260 monitor_printf(mon, " ");
1261
1262 qdict = qdict_get_qdict(device, "class_info");
1263 if (qdict_haskey(qdict, "desc")) {
1264 monitor_printf(mon, "%s", qdict_get_str(qdict, "desc"));
1265 } else {
1266 monitor_printf(mon, "Class %04" PRId64, qdict_get_int(qdict, "class"));
1267 }
1268
1269 qdict = qdict_get_qdict(device, "id");
1270 monitor_printf(mon, ": PCI device %04" PRIx64 ":%04" PRIx64 "\n",
1271 qdict_get_int(qdict, "device"),
1272 qdict_get_int(qdict, "vendor"));
1273
1274 if (qdict_haskey(device, "irq")) {
1275 monitor_printf(mon, " IRQ %" PRId64 ".\n",
1276 qdict_get_int(device, "irq"));
1277 }
1278
1279 if (qdict_haskey(device, "pci_bridge")) {
1280 QDict *info;
1281
1282 qdict = qdict_get_qdict(device, "pci_bridge");
1283
1284 info = qdict_get_qdict(qdict, "bus");
1285 monitor_printf(mon, " BUS %" PRId64 ".\n",
1286 qdict_get_int(info, "number"));
1287 monitor_printf(mon, " secondary bus %" PRId64 ".\n",
1288 qdict_get_int(info, "secondary"));
1289 monitor_printf(mon, " subordinate bus %" PRId64 ".\n",
1290 qdict_get_int(info, "subordinate"));
1291
1292 info = qdict_get_qdict(qdict, "io_range");
1293 monitor_printf(mon, " IO range [0x%04"PRIx64", 0x%04"PRIx64"]\n",
1294 qdict_get_int(info, "base"),
1295 qdict_get_int(info, "limit"));
1296
1297 info = qdict_get_qdict(qdict, "memory_range");
1298 monitor_printf(mon,
1299 " memory range [0x%08"PRIx64", 0x%08"PRIx64"]\n",
1300 qdict_get_int(info, "base"),
1301 qdict_get_int(info, "limit"));
1302
1303 info = qdict_get_qdict(qdict, "prefetchable_range");
1304 monitor_printf(mon, " prefetchable memory range "
1305 "[0x%08"PRIx64", 0x%08"PRIx64"]\n",
1306 qdict_get_int(info, "base"),
1307 qdict_get_int(info, "limit"));
1308 }
1309
1310 QLIST_FOREACH_ENTRY(qdict_get_qlist(device, "regions"), entry) {
1311 qdict = qobject_to_qdict(qlist_entry_obj(entry));
1312 monitor_printf(mon, " BAR%d: ", (int) qdict_get_int(qdict, "bar"));
1313
1314 addr = qdict_get_int(qdict, "address");
1315 size = qdict_get_int(qdict, "size");
1316
1317 if (!strcmp(qdict_get_str(qdict, "type"), "io")) {
1318 monitor_printf(mon, "I/O at 0x%04"FMT_PCIBUS
1319 " [0x%04"FMT_PCIBUS"].\n",
1320 addr, addr + size - 1);
1321 } else {
1322 monitor_printf(mon, "%d bit%s memory at 0x%08"FMT_PCIBUS
1323 " [0x%08"FMT_PCIBUS"].\n",
1324 qdict_get_bool(qdict, "mem_type_64") ? 64 : 32,
1325 qdict_get_bool(qdict, "prefetch") ?
1326 " prefetchable" : "", addr, addr + size - 1);
1327 }
1328 }
1329
1330 monitor_printf(mon, " id \"%s\"\n", qdict_get_str(device, "qdev_id"));
1331
1332 if (qdict_haskey(device, "pci_bridge")) {
1333 qdict = qdict_get_qdict(device, "pci_bridge");
1334 if (qdict_haskey(qdict, "devices")) {
1335 QListEntry *dev;
1336 QLIST_FOREACH_ENTRY(qdict_get_qlist(qdict, "devices"), dev) {
1337 pci_device_print(mon, qobject_to_qdict(qlist_entry_obj(dev)));
1338 }
1339 }
1340 }
1341 }
1342
1343 void do_pci_info_print(Monitor *mon, const QObject *data)
1344 {
1345 QListEntry *bus, *dev;
1346
1347 QLIST_FOREACH_ENTRY(qobject_to_qlist(data), bus) {
1348 QDict *qdict = qobject_to_qdict(qlist_entry_obj(bus));
1349 QLIST_FOREACH_ENTRY(qdict_get_qlist(qdict, "devices"), dev) {
1350 pci_device_print(mon, qobject_to_qdict(qlist_entry_obj(dev)));
1351 }
1352 }
1353 }
1354
1355 static QObject *pci_get_dev_class(const PCIDevice *dev)
1356 {
1357 int class;
1358 const pci_class_desc *desc;
1359
1360 class = pci_get_word(dev->config + PCI_CLASS_DEVICE);
1361 desc = pci_class_descriptions;
1362 while (desc->desc && class != desc->class)
1363 desc++;
1364
1365 if (desc->desc) {
1366 return qobject_from_jsonf("{ 'desc': %s, 'class': %d }",
1367 desc->desc, class);
1368 } else {
1369 return qobject_from_jsonf("{ 'class': %d }", class);
1370 }
1371 }
1372
1373 static QObject *pci_get_dev_id(const PCIDevice *dev)
1374 {
1375 return qobject_from_jsonf("{ 'device': %d, 'vendor': %d }",
1376 pci_get_word(dev->config + PCI_VENDOR_ID),
1377 pci_get_word(dev->config + PCI_DEVICE_ID));
1378 }
1379
1380 static QObject *pci_get_regions_list(const PCIDevice *dev)
1381 {
1382 int i;
1383 QList *regions_list;
1384
1385 regions_list = qlist_new();
1386
1387 for (i = 0; i < PCI_NUM_REGIONS; i++) {
1388 QObject *obj;
1389 const PCIIORegion *r = &dev->io_regions[i];
1390
1391 if (!r->size) {
1392 continue;
1393 }
1394
1395 if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
1396 obj = qobject_from_jsonf("{ 'bar': %d, 'type': 'io', "
1397 "'address': %" PRId64 ", "
1398 "'size': %" PRId64 " }",
1399 i, r->addr, r->size);
1400 } else {
1401 int mem_type_64 = r->type & PCI_BASE_ADDRESS_MEM_TYPE_64;
1402
1403 obj = qobject_from_jsonf("{ 'bar': %d, 'type': 'memory', "
1404 "'mem_type_64': %i, 'prefetch': %i, "
1405 "'address': %" PRId64 ", "
1406 "'size': %" PRId64 " }",
1407 i, mem_type_64,
1408 r->type & PCI_BASE_ADDRESS_MEM_PREFETCH,
1409 r->addr, r->size);
1410 }
1411
1412 qlist_append_obj(regions_list, obj);
1413 }
1414
1415 return QOBJECT(regions_list);
1416 }
1417
1418 static QObject *pci_get_devices_list(PCIBus *bus, int bus_num);
1419
1420 static QObject *pci_get_dev_dict(PCIDevice *dev, PCIBus *bus, int bus_num)
1421 {
1422 uint8_t type;
1423 QObject *obj;
1424
1425 obj = qobject_from_jsonf("{ 'bus': %d, 'slot': %d, 'function': %d," "'class_info': %p, 'id': %p, 'regions': %p,"
1426 " 'qdev_id': %s }",
1427 bus_num,
1428 PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn),
1429 pci_get_dev_class(dev), pci_get_dev_id(dev),
1430 pci_get_regions_list(dev),
1431 dev->qdev.id ? dev->qdev.id : "");
1432
1433 if (dev->config[PCI_INTERRUPT_PIN] != 0) {
1434 QDict *qdict = qobject_to_qdict(obj);
1435 qdict_put(qdict, "irq", qint_from_int(dev->config[PCI_INTERRUPT_LINE]));
1436 }
1437
1438 type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION;
1439 if (type == PCI_HEADER_TYPE_BRIDGE) {
1440 QDict *qdict;
1441 QObject *pci_bridge;
1442
1443 pci_bridge = qobject_from_jsonf("{ 'bus': "
1444 "{ 'number': %d, 'secondary': %d, 'subordinate': %d }, "
1445 "'io_range': { 'base': %" PRId64 ", 'limit': %" PRId64 "}, "
1446 "'memory_range': { 'base': %" PRId64 ", 'limit': %" PRId64 "}, "
1447 "'prefetchable_range': { 'base': %" PRId64 ", 'limit': %" PRId64 "} }",
1448 dev->config[PCI_PRIMARY_BUS], dev->config[PCI_SECONDARY_BUS],
1449 dev->config[PCI_SUBORDINATE_BUS],
1450 pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO),
1451 pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO),
1452 pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY),
1453 pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY),
1454 pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY |
1455 PCI_BASE_ADDRESS_MEM_PREFETCH),
1456 pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY |
1457 PCI_BASE_ADDRESS_MEM_PREFETCH));
1458
1459 if (dev->config[PCI_SECONDARY_BUS] != 0) {
1460 PCIBus *child_bus = pci_find_bus(bus, dev->config[PCI_SECONDARY_BUS]);
1461
1462 if (child_bus) {
1463 qdict = qobject_to_qdict(pci_bridge);
1464 qdict_put_obj(qdict, "devices",
1465 pci_get_devices_list(child_bus,
1466 dev->config[PCI_SECONDARY_BUS]));
1467 }
1468 }
1469 qdict = qobject_to_qdict(obj);
1470 qdict_put_obj(qdict, "pci_bridge", pci_bridge);
1471 }
1472
1473 return obj;
1474 }
1475
1476 static QObject *pci_get_devices_list(PCIBus *bus, int bus_num)
1477 {
1478 int devfn;
1479 PCIDevice *dev;
1480 QList *dev_list;
1481
1482 dev_list = qlist_new();
1483
1484 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) {
1485 dev = bus->devices[devfn];
1486 if (dev) {
1487 qlist_append_obj(dev_list, pci_get_dev_dict(dev, bus, bus_num));
1488 }
1489 }
1490
1491 return QOBJECT(dev_list);
1492 }
1493
1494 static QObject *pci_get_bus_dict(PCIBus *bus, int bus_num)
1495 {
1496 bus = pci_find_bus(bus, bus_num);
1497 if (bus) {
1498 return qobject_from_jsonf("{ 'bus': %d, 'devices': %p }",
1499 bus_num, pci_get_devices_list(bus, bus_num));
1500 }
1501
1502 return NULL;
1503 }
1504
1505 void do_pci_info(Monitor *mon, QObject **ret_data)
1506 {
1507 QList *bus_list;
1508 struct PCIHostBus *host;
1509
1510 bus_list = qlist_new();
1511
1512 QLIST_FOREACH(host, &host_buses, next) {
1513 QObject *obj = pci_get_bus_dict(host->bus, 0);
1514 if (obj) {
1515 qlist_append_obj(bus_list, obj);
1516 }
1517 }
1518
1519 *ret_data = QOBJECT(bus_list);
1520 }
1521
1522 static const char * const pci_nic_models[] = {
1523 "ne2k_pci",
1524 "i82551",
1525 "i82557b",
1526 "i82559er",
1527 "rtl8139",
1528 "e1000",
1529 "pcnet",
1530 "virtio",
1531 NULL
1532 };
1533
1534 static const char * const pci_nic_names[] = {
1535 "ne2k_pci",
1536 "i82551",
1537 "i82557b",
1538 "i82559er",
1539 "rtl8139",
1540 "e1000",
1541 "pcnet",
1542 "virtio-net-pci",
1543 NULL
1544 };
1545
1546 /* Initialize a PCI NIC. */
1547 /* FIXME callers should check for failure, but don't */
1548 PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
1549 const char *default_devaddr)
1550 {
1551 const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr;
1552 PCIBus *bus;
1553 int devfn;
1554 PCIDevice *pci_dev;
1555 DeviceState *dev;
1556 int i;
1557
1558 i = qemu_find_nic_model(nd, pci_nic_models, default_model);
1559 if (i < 0)
1560 return NULL;
1561
1562 bus = pci_get_bus_devfn(&devfn, devaddr);
1563 if (!bus) {
1564 error_report("Invalid PCI device address %s for device %s",
1565 devaddr, pci_nic_names[i]);
1566 return NULL;
1567 }
1568
1569 pci_dev = pci_create(bus, devfn, pci_nic_names[i]);
1570 dev = &pci_dev->qdev;
1571 qdev_set_nic_properties(dev, nd);
1572 if (qdev_init(dev) < 0)
1573 return NULL;
1574 return pci_dev;
1575 }
1576
1577 PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
1578 const char *default_devaddr)
1579 {
1580 PCIDevice *res;
1581
1582 if (qemu_show_nic_models(nd->model, pci_nic_models))
1583 exit(0);
1584
1585 res = pci_nic_init(nd, default_model, default_devaddr);
1586 if (!res)
1587 exit(1);
1588 return res;
1589 }
1590
1591 static void pci_bridge_update_mappings_fn(PCIBus *b, PCIDevice *d)
1592 {
1593 pci_update_mappings(d);
1594 }
1595
1596 void pci_bridge_update_mappings(PCIBus *b)
1597 {
1598 PCIBus *child;
1599
1600 pci_for_each_device_under_bus(b, pci_bridge_update_mappings_fn);
1601
1602 QLIST_FOREACH(child, &b->child, sibling) {
1603 pci_bridge_update_mappings(child);
1604 }
1605 }
1606
1607 /* Whether a given bus number is in range of the secondary
1608 * bus of the given bridge device. */
1609 static bool pci_secondary_bus_in_range(PCIDevice *dev, int bus_num)
1610 {
1611 return !(pci_get_word(dev->config + PCI_BRIDGE_CONTROL) &
1612 PCI_BRIDGE_CTL_BUS_RESET) /* Don't walk the bus if it's reset. */ &&
1613 dev->config[PCI_SECONDARY_BUS] < bus_num &&
1614 bus_num <= dev->config[PCI_SUBORDINATE_BUS];
1615 }
1616
1617 PCIBus *pci_find_bus(PCIBus *bus, int bus_num)
1618 {
1619 PCIBus *sec;
1620
1621 if (!bus) {
1622 return NULL;
1623 }
1624
1625 if (pci_bus_num(bus) == bus_num) {
1626 return bus;
1627 }
1628
1629 /* Consider all bus numbers in range for the host pci bridge. */
1630 if (bus->parent_dev &&
1631 !pci_secondary_bus_in_range(bus->parent_dev, bus_num)) {
1632 return NULL;
1633 }
1634
1635 /* try child bus */
1636 for (; bus; bus = sec) {
1637 QLIST_FOREACH(sec, &bus->child, sibling) {
1638 assert(sec->parent_dev);
1639 if (sec->parent_dev->config[PCI_SECONDARY_BUS] == bus_num) {
1640 return sec;
1641 }
1642 if (pci_secondary_bus_in_range(sec->parent_dev, bus_num)) {
1643 break;
1644 }
1645 }
1646 }
1647
1648 return NULL;
1649 }
1650
1651 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn)
1652 {
1653 bus = pci_find_bus(bus, bus_num);
1654
1655 if (!bus)
1656 return NULL;
1657
1658 return bus->devices[devfn];
1659 }
1660
1661 static int pci_qdev_init(DeviceState *qdev, DeviceInfo *base)
1662 {
1663 PCIDevice *pci_dev = (PCIDevice *)qdev;
1664 PCIDeviceInfo *info = container_of(base, PCIDeviceInfo, qdev);
1665 PCIBus *bus;
1666 int rc;
1667 bool is_default_rom;
1668
1669 /* initialize cap_present for pci_is_express() and pci_config_size() */
1670 if (info->is_express) {
1671 pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
1672 }
1673
1674 bus = FROM_QBUS(PCIBus, qdev_get_parent_bus(qdev));
1675 pci_dev = do_pci_register_device(pci_dev, bus, base->name,
1676 pci_dev->devfn, info);
1677 if (pci_dev == NULL)
1678 return -1;
1679 if (qdev->hotplugged && info->no_hotplug) {
1680 qerror_report(QERR_DEVICE_NO_HOTPLUG, info->qdev.name);
1681 do_pci_unregister_device(pci_dev);
1682 return -1;
1683 }
1684 if (info->init) {
1685 rc = info->init(pci_dev);
1686 if (rc != 0) {
1687 do_pci_unregister_device(pci_dev);
1688 return rc;
1689 }
1690 }
1691
1692 /* rom loading */
1693 is_default_rom = false;
1694 if (pci_dev->romfile == NULL && info->romfile != NULL) {
1695 pci_dev->romfile = qemu_strdup(info->romfile);
1696 is_default_rom = true;
1697 }
1698 pci_add_option_rom(pci_dev, is_default_rom);
1699
1700 if (bus->hotplug) {
1701 /* Let buses differentiate between hotplug and when device is
1702 * enabled during qemu machine creation. */
1703 rc = bus->hotplug(bus->hotplug_qdev, pci_dev,
1704 qdev->hotplugged ? PCI_HOTPLUG_ENABLED:
1705 PCI_COLDPLUG_ENABLED);
1706 if (rc != 0) {
1707 int r = pci_unregister_device(&pci_dev->qdev);
1708 assert(!r);
1709 return rc;
1710 }
1711 }
1712 return 0;
1713 }
1714
1715 static int pci_unplug_device(DeviceState *qdev)
1716 {
1717 PCIDevice *dev = DO_UPCAST(PCIDevice, qdev, qdev);
1718 PCIDeviceInfo *info = container_of(qdev->info, PCIDeviceInfo, qdev);
1719
1720 if (info->no_hotplug) {
1721 qerror_report(QERR_DEVICE_NO_HOTPLUG, info->qdev.name);
1722 return -1;
1723 }
1724 return dev->bus->hotplug(dev->bus->hotplug_qdev, dev,
1725 PCI_HOTPLUG_DISABLED);
1726 }
1727
1728 void pci_qdev_register(PCIDeviceInfo *info)
1729 {
1730 info->qdev.init = pci_qdev_init;
1731 info->qdev.unplug = pci_unplug_device;
1732 info->qdev.exit = pci_unregister_device;
1733 info->qdev.bus_info = &pci_bus_info;
1734 qdev_register(&info->qdev);
1735 }
1736
1737 void pci_qdev_register_many(PCIDeviceInfo *info)
1738 {
1739 while (info->qdev.name) {
1740 pci_qdev_register(info);
1741 info++;
1742 }
1743 }
1744
1745 PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction,
1746 const char *name)
1747 {
1748 DeviceState *dev;
1749
1750 dev = qdev_create(&bus->qbus, name);
1751 qdev_prop_set_uint32(dev, "addr", devfn);
1752 qdev_prop_set_bit(dev, "multifunction", multifunction);
1753 return DO_UPCAST(PCIDevice, qdev, dev);
1754 }
1755
1756 PCIDevice *pci_try_create_multifunction(PCIBus *bus, int devfn,
1757 bool multifunction,
1758 const char *name)
1759 {
1760 DeviceState *dev;
1761
1762 dev = qdev_try_create(&bus->qbus, name);
1763 if (!dev) {
1764 return NULL;
1765 }
1766 qdev_prop_set_uint32(dev, "addr", devfn);
1767 qdev_prop_set_bit(dev, "multifunction", multifunction);
1768 return DO_UPCAST(PCIDevice, qdev, dev);
1769 }
1770
1771 PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn,
1772 bool multifunction,
1773 const char *name)
1774 {
1775 PCIDevice *dev = pci_create_multifunction(bus, devfn, multifunction, name);
1776 qdev_init_nofail(&dev->qdev);
1777 return dev;
1778 }
1779
1780 PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name)
1781 {
1782 return pci_create_multifunction(bus, devfn, false, name);
1783 }
1784
1785 PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name)
1786 {
1787 return pci_create_simple_multifunction(bus, devfn, false, name);
1788 }
1789
1790 PCIDevice *pci_try_create(PCIBus *bus, int devfn, const char *name)
1791 {
1792 return pci_try_create_multifunction(bus, devfn, false, name);
1793 }
1794
1795 static int pci_find_space(PCIDevice *pdev, uint8_t size)
1796 {
1797 int config_size = pci_config_size(pdev);
1798 int offset = PCI_CONFIG_HEADER_SIZE;
1799 int i;
1800 for (i = PCI_CONFIG_HEADER_SIZE; i < config_size; ++i)
1801 if (pdev->used[i])
1802 offset = i + 1;
1803 else if (i - offset + 1 == size)
1804 return offset;
1805 return 0;
1806 }
1807
1808 static uint8_t pci_find_capability_list(PCIDevice *pdev, uint8_t cap_id,
1809 uint8_t *prev_p)
1810 {
1811 uint8_t next, prev;
1812
1813 if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST))
1814 return 0;
1815
1816 for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]);
1817 prev = next + PCI_CAP_LIST_NEXT)
1818 if (pdev->config[next + PCI_CAP_LIST_ID] == cap_id)
1819 break;
1820
1821 if (prev_p)
1822 *prev_p = prev;
1823 return next;
1824 }
1825
1826 static void pci_map_option_rom(PCIDevice *pdev, int region_num, pcibus_t addr, pcibus_t size, int type)
1827 {
1828 cpu_register_physical_memory(addr, size, pdev->rom_offset);
1829 }
1830
1831 /* Patch the PCI vendor and device ids in a PCI rom image if necessary.
1832 This is needed for an option rom which is used for more than one device. */
1833 static void pci_patch_ids(PCIDevice *pdev, uint8_t *ptr, int size)
1834 {
1835 uint16_t vendor_id;
1836 uint16_t device_id;
1837 uint16_t rom_vendor_id;
1838 uint16_t rom_device_id;
1839 uint16_t rom_magic;
1840 uint16_t pcir_offset;
1841 uint8_t checksum;
1842
1843 /* Words in rom data are little endian (like in PCI configuration),
1844 so they can be read / written with pci_get_word / pci_set_word. */
1845
1846 /* Only a valid rom will be patched. */
1847 rom_magic = pci_get_word(ptr);
1848 if (rom_magic != 0xaa55) {
1849 PCI_DPRINTF("Bad ROM magic %04x\n", rom_magic);
1850 return;
1851 }
1852 pcir_offset = pci_get_word(ptr + 0x18);
1853 if (pcir_offset + 8 >= size || memcmp(ptr + pcir_offset, "PCIR", 4)) {
1854 PCI_DPRINTF("Bad PCIR offset 0x%x or signature\n", pcir_offset);
1855 return;
1856 }
1857
1858 vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID);
1859 device_id = pci_get_word(pdev->config + PCI_DEVICE_ID);
1860 rom_vendor_id = pci_get_word(ptr + pcir_offset + 4);
1861 rom_device_id = pci_get_word(ptr + pcir_offset + 6);
1862
1863 PCI_DPRINTF("%s: ROM id %04x%04x / PCI id %04x%04x\n", pdev->romfile,
1864 vendor_id, device_id, rom_vendor_id, rom_device_id);
1865
1866 checksum = ptr[6];
1867
1868 if (vendor_id != rom_vendor_id) {
1869 /* Patch vendor id and checksum (at offset 6 for etherboot roms). */
1870 checksum += (uint8_t)rom_vendor_id + (uint8_t)(rom_vendor_id >> 8);
1871 checksum -= (uint8_t)vendor_id + (uint8_t)(vendor_id >> 8);
1872 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum);
1873 ptr[6] = checksum;
1874 pci_set_word(ptr + pcir_offset + 4, vendor_id);
1875 }
1876
1877 if (device_id != rom_device_id) {
1878 /* Patch device id and checksum (at offset 6 for etherboot roms). */
1879 checksum += (uint8_t)rom_device_id + (uint8_t)(rom_device_id >> 8);
1880 checksum -= (uint8_t)device_id + (uint8_t)(device_id >> 8);
1881 PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum);
1882 ptr[6] = checksum;
1883 pci_set_word(ptr + pcir_offset + 6, device_id);
1884 }
1885 }
1886
1887 /* Add an option rom for the device */
1888 static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom)
1889 {
1890 int size;
1891 char *path;
1892 void *ptr;
1893 char name[32];
1894
1895 if (!pdev->romfile)
1896 return 0;
1897 if (strlen(pdev->romfile) == 0)
1898 return 0;
1899
1900 if (!pdev->rom_bar) {
1901 /*
1902 * Load rom via fw_cfg instead of creating a rom bar,
1903 * for 0.11 compatibility.
1904 */
1905 int class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
1906 if (class == 0x0300) {
1907 rom_add_vga(pdev->romfile);
1908 } else {
1909 rom_add_option(pdev->romfile, -1);
1910 }
1911 return 0;
1912 }
1913
1914 path = qemu_find_file(QEMU_FILE_TYPE_BIOS, pdev->romfile);
1915 if (path == NULL) {
1916 path = qemu_strdup(pdev->romfile);
1917 }
1918
1919 size = get_image_size(path);
1920 if (size < 0) {
1921 error_report("%s: failed to find romfile \"%s\"",
1922 __FUNCTION__, pdev->romfile);
1923 qemu_free(path);
1924 return -1;
1925 }
1926 if (size & (size - 1)) {
1927 size = 1 << qemu_fls(size);
1928 }
1929
1930 if (pdev->qdev.info->vmsd)
1931 snprintf(name, sizeof(name), "%s.rom", pdev->qdev.info->vmsd->name);
1932 else
1933 snprintf(name, sizeof(name), "%s.rom", pdev->qdev.info->name);
1934 pdev->rom_offset = qemu_ram_alloc(&pdev->qdev, name, size);
1935
1936 ptr = qemu_get_ram_ptr(pdev->rom_offset);
1937 load_image(path, ptr);
1938 qemu_free(path);
1939
1940 if (is_default_rom) {
1941 /* Only the default rom images will be patched (if needed). */
1942 pci_patch_ids(pdev, ptr, size);
1943 }
1944
1945 qemu_put_ram_ptr(ptr);
1946
1947 pci_register_bar(pdev, PCI_ROM_SLOT, size,
1948 0, pci_map_option_rom);
1949
1950 return 0;
1951 }
1952
1953 static void pci_del_option_rom(PCIDevice *pdev)
1954 {
1955 if (!pdev->rom_offset)
1956 return;
1957
1958 qemu_ram_free(pdev->rom_offset);
1959 pdev->rom_offset = 0;
1960 }
1961
1962 /*
1963 * if !offset
1964 * Reserve space and add capability to the linked list in pci config space
1965 *
1966 * if offset = 0,
1967 * Find and reserve space and add capability to the linked list
1968 * in pci config space */
1969 int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
1970 uint8_t offset, uint8_t size)
1971 {
1972 uint8_t *config;
1973 if (!offset) {
1974 offset = pci_find_space(pdev, size);
1975 if (!offset) {
1976 return -ENOSPC;
1977 }
1978 }
1979
1980 config = pdev->config + offset;
1981 config[PCI_CAP_LIST_ID] = cap_id;
1982 config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST];
1983 pdev->config[PCI_CAPABILITY_LIST] = offset;
1984 pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
1985 memset(pdev->used + offset, 0xFF, size);
1986 /* Make capability read-only by default */
1987 memset(pdev->wmask + offset, 0, size);
1988 /* Check capability by default */
1989 memset(pdev->cmask + offset, 0xFF, size);
1990 return offset;
1991 }
1992
1993 /* Unlink capability from the pci config space. */
1994 void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size)
1995 {
1996 uint8_t prev, offset = pci_find_capability_list(pdev, cap_id, &prev);
1997 if (!offset)
1998 return;
1999 pdev->config[prev] = pdev->config[offset + PCI_CAP_LIST_NEXT];
2000 /* Make capability writable again */
2001 memset(pdev->wmask + offset, 0xff, size);
2002 memset(pdev->w1cmask + offset, 0, size);
2003 /* Clear cmask as device-specific registers can't be checked */
2004 memset(pdev->cmask + offset, 0, size);
2005 memset(pdev->used + offset, 0, size);
2006
2007 if (!pdev->config[PCI_CAPABILITY_LIST])
2008 pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST;
2009 }
2010
2011 /* Reserve space for capability at a known offset (to call after load). */
2012 void pci_reserve_capability(PCIDevice *pdev, uint8_t offset, uint8_t size)
2013 {
2014 memset(pdev->used + offset, 0xff, size);
2015 }
2016
2017 uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id)
2018 {
2019 return pci_find_capability_list(pdev, cap_id, NULL);
2020 }
2021
2022 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent)
2023 {
2024 PCIDevice *d = (PCIDevice *)dev;
2025 const pci_class_desc *desc;
2026 char ctxt[64];
2027 PCIIORegion *r;
2028 int i, class;
2029
2030 class = pci_get_word(d->config + PCI_CLASS_DEVICE);
2031 desc = pci_class_descriptions;
2032 while (desc->desc && class != desc->class)
2033 desc++;
2034 if (desc->desc) {
2035 snprintf(ctxt, sizeof(ctxt), "%s", desc->desc);
2036 } else {
2037 snprintf(ctxt, sizeof(ctxt), "Class %04x", class);
2038 }
2039
2040 monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, "
2041 "pci id %04x:%04x (sub %04x:%04x)\n",
2042 indent, "", ctxt, pci_bus_num(d->bus),
2043 PCI_SLOT(d->devfn), PCI_FUNC(d->devfn),
2044 pci_get_word(d->config + PCI_VENDOR_ID),
2045 pci_get_word(d->config + PCI_DEVICE_ID),
2046 pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID),
2047 pci_get_word(d->config + PCI_SUBSYSTEM_ID));
2048 for (i = 0; i < PCI_NUM_REGIONS; i++) {
2049 r = &d->io_regions[i];
2050 if (!r->size)
2051 continue;
2052 monitor_printf(mon, "%*sbar %d: %s at 0x%"FMT_PCIBUS
2053 " [0x%"FMT_PCIBUS"]\n",
2054 indent, "",
2055 i, r->type & PCI_BASE_ADDRESS_SPACE_IO ? "i/o" : "mem",
2056 r->addr, r->addr + r->size - 1);
2057 }
2058 }
2059
2060 static char *pci_dev_fw_name(DeviceState *dev, char *buf, int len)
2061 {
2062 PCIDevice *d = (PCIDevice *)dev;
2063 const char *name = NULL;
2064 const pci_class_desc *desc = pci_class_descriptions;
2065 int class = pci_get_word(d->config + PCI_CLASS_DEVICE);
2066
2067 while (desc->desc &&
2068 (class & ~desc->fw_ign_bits) !=
2069 (desc->class & ~desc->fw_ign_bits)) {
2070 desc++;
2071 }
2072
2073 if (desc->desc) {
2074 name = desc->fw_name;
2075 }
2076
2077 if (name) {
2078 pstrcpy(buf, len, name);
2079 } else {
2080 snprintf(buf, len, "pci%04x,%04x",
2081 pci_get_word(d->config + PCI_VENDOR_ID),
2082 pci_get_word(d->config + PCI_DEVICE_ID));
2083 }
2084
2085 return buf;
2086 }
2087
2088 static char *pcibus_get_fw_dev_path(DeviceState *dev)
2089 {
2090 PCIDevice *d = (PCIDevice *)dev;
2091 char path[50], name[33];
2092 int off;
2093
2094 off = snprintf(path, sizeof(path), "%s@%x",
2095 pci_dev_fw_name(dev, name, sizeof name),
2096 PCI_SLOT(d->devfn));
2097 if (PCI_FUNC(d->devfn))
2098 snprintf(path + off, sizeof(path) + off, ",%x", PCI_FUNC(d->devfn));
2099 return strdup(path);
2100 }
2101
2102 static char *pcibus_get_dev_path(DeviceState *dev)
2103 {
2104 PCIDevice *d = container_of(dev, PCIDevice, qdev);
2105 PCIDevice *t;
2106 int slot_depth;
2107 /* Path format: Domain:00:Slot.Function:Slot.Function....:Slot.Function.
2108 * 00 is added here to make this format compatible with
2109 * domain:Bus:Slot.Func for systems without nested PCI bridges.
2110 * Slot.Function list specifies the slot and function numbers for all
2111 * devices on the path from root to the specific device. */
2112 char domain[] = "DDDD:00";
2113 char slot[] = ":SS.F";
2114 int domain_len = sizeof domain - 1 /* For '\0' */;
2115 int slot_len = sizeof slot - 1 /* For '\0' */;
2116 int path_len;
2117 char *path, *p;
2118 int s;
2119
2120 /* Calculate # of slots on path between device and root. */;
2121 slot_depth = 0;
2122 for (t = d; t; t = t->bus->parent_dev) {
2123 ++slot_depth;
2124 }
2125
2126 path_len = domain_len + slot_len * slot_depth;
2127
2128 /* Allocate memory, fill in the terminating null byte. */
2129 path = qemu_malloc(path_len + 1 /* For '\0' */);
2130 path[path_len] = '\0';
2131
2132 /* First field is the domain. */
2133 s = snprintf(domain, sizeof domain, "%04x:00", pci_find_domain(d->bus));
2134 assert(s == domain_len);
2135 memcpy(path, domain, domain_len);
2136
2137 /* Fill in slot numbers. We walk up from device to root, so need to print
2138 * them in the reverse order, last to first. */
2139 p = path + path_len;
2140 for (t = d; t; t = t->bus->parent_dev) {
2141 p -= slot_len;
2142 s = snprintf(slot, sizeof slot, ":%02x.%x",
2143 PCI_SLOT(t->devfn), PCI_FUNC(t->devfn));
2144 assert(s == slot_len);
2145 memcpy(p, slot, slot_len);
2146 }
2147
2148 return path;
2149 }
2150
2151 static int pci_qdev_find_recursive(PCIBus *bus,
2152 const char *id, PCIDevice **pdev)
2153 {
2154 DeviceState *qdev = qdev_find_recursive(&bus->qbus, id);
2155 if (!qdev) {
2156 return -ENODEV;
2157 }
2158
2159 /* roughly check if given qdev is pci device */
2160 if (qdev->info->init == &pci_qdev_init &&
2161 qdev->parent_bus->info == &pci_bus_info) {
2162 *pdev = DO_UPCAST(PCIDevice, qdev, qdev);
2163 return 0;
2164 }
2165 return -EINVAL;
2166 }
2167
2168 int pci_qdev_find_device(const char *id, PCIDevice **pdev)
2169 {
2170 struct PCIHostBus *host;
2171 int rc = -ENODEV;
2172
2173 QLIST_FOREACH(host, &host_buses, next) {
2174 int tmp = pci_qdev_find_recursive(host->bus, id, pdev);
2175 if (!tmp) {
2176 rc = 0;
2177 break;
2178 }
2179 if (tmp != -ENODEV) {
2180 rc = tmp;
2181 }
2182 }
2183
2184 return rc;
2185 }
QEmu