]> Git Repo - qemu.git/blob - hw/pci-host/piix.c
Merge remote-tracking branch 'remotes/lalrae/tags/mips-20160712' into staging
[qemu.git] / hw / pci-host / piix.c
1 /*
2  * QEMU i440FX/PIIX3 PCI Bridge Emulation
3  *
4  * Copyright (c) 2006 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
25 #include "qemu/osdep.h"
26 #include "hw/hw.h"
27 #include "hw/i386/pc.h"
28 #include "hw/pci/pci.h"
29 #include "hw/pci/pci_host.h"
30 #include "hw/isa/isa.h"
31 #include "hw/sysbus.h"
32 #include "qapi/error.h"
33 #include "qemu/range.h"
34 #include "hw/xen/xen.h"
35 #include "hw/pci-host/pam.h"
36 #include "sysemu/sysemu.h"
37 #include "hw/i386/ioapic.h"
38 #include "qapi/visitor.h"
39 #include "qemu/error-report.h"
40
41 /*
42  * I440FX chipset data sheet.
43  * http://download.intel.com/design/chipsets/datashts/29054901.pdf
44  */
45
46 #define I440FX_PCI_HOST_BRIDGE(obj) \
47     OBJECT_CHECK(I440FXState, (obj), TYPE_I440FX_PCI_HOST_BRIDGE)
48
49 typedef struct I440FXState {
50     PCIHostState parent_obj;
51     Range pci_hole;
52     uint64_t pci_hole64_size;
53     uint32_t short_root_bus;
54 } I440FXState;
55
56 #define PIIX_NUM_PIC_IRQS       16      /* i8259 * 2 */
57 #define PIIX_NUM_PIRQS          4ULL    /* PIRQ[A-D] */
58 #define XEN_PIIX_NUM_PIRQS      128ULL
59 #define PIIX_PIRQC              0x60
60
61 /*
62  * Reset Control Register: PCI-accessible ISA-Compatible Register at address
63  * 0xcf9, provided by the PCI/ISA bridge (PIIX3 PCI function 0, 8086:7000).
64  */
65 #define RCR_IOPORT 0xcf9
66
67 typedef struct PIIX3State {
68     PCIDevice dev;
69
70     /*
71      * bitmap to track pic levels.
72      * The pic level is the logical OR of all the PCI irqs mapped to it
73      * So one PIC level is tracked by PIIX_NUM_PIRQS bits.
74      *
75      * PIRQ is mapped to PIC pins, we track it by
76      * PIIX_NUM_PIRQS * PIIX_NUM_PIC_IRQS = 64 bits with
77      * pic_irq * PIIX_NUM_PIRQS + pirq
78      */
79 #if PIIX_NUM_PIC_IRQS * PIIX_NUM_PIRQS > 64
80 #error "unable to encode pic state in 64bit in pic_levels."
81 #endif
82     uint64_t pic_levels;
83
84     qemu_irq *pic;
85
86     /* This member isn't used. Just for save/load compatibility */
87     int32_t pci_irq_levels_vmstate[PIIX_NUM_PIRQS];
88
89     /* Reset Control Register contents */
90     uint8_t rcr;
91
92     /* IO memory region for Reset Control Register (RCR_IOPORT) */
93     MemoryRegion rcr_mem;
94 } PIIX3State;
95
96 #define TYPE_PIIX3_PCI_DEVICE "pci-piix3"
97 #define PIIX3_PCI_DEVICE(obj) \
98     OBJECT_CHECK(PIIX3State, (obj), TYPE_PIIX3_PCI_DEVICE)
99
100 #define I440FX_PCI_DEVICE(obj) \
101     OBJECT_CHECK(PCII440FXState, (obj), TYPE_I440FX_PCI_DEVICE)
102
103 struct PCII440FXState {
104     /*< private >*/
105     PCIDevice parent_obj;
106     /*< public >*/
107
108     MemoryRegion *system_memory;
109     MemoryRegion *pci_address_space;
110     MemoryRegion *ram_memory;
111     PAMMemoryRegion pam_regions[13];
112     MemoryRegion smram_region;
113     MemoryRegion smram, low_smram;
114 };
115
116
117 #define I440FX_PAM      0x59
118 #define I440FX_PAM_SIZE 7
119 #define I440FX_SMRAM    0x72
120
121 /* Older coreboot versions (4.0 and older) read a config register that doesn't
122  * exist in real hardware, to get the RAM size from QEMU.
123  */
124 #define I440FX_COREBOOT_RAM_SIZE 0x57
125
126 static void piix3_set_irq(void *opaque, int pirq, int level);
127 static PCIINTxRoute piix3_route_intx_pin_to_irq(void *opaque, int pci_intx);
128 static void piix3_write_config_xen(PCIDevice *dev,
129                                uint32_t address, uint32_t val, int len);
130
131 /* return the global irq number corresponding to a given device irq
132    pin. We could also use the bus number to have a more precise
133    mapping. */
134 static int pci_slot_get_pirq(PCIDevice *pci_dev, int pci_intx)
135 {
136     int slot_addend;
137     slot_addend = (pci_dev->devfn >> 3) - 1;
138     return (pci_intx + slot_addend) & 3;
139 }
140
141 static void i440fx_update_memory_mappings(PCII440FXState *d)
142 {
143     int i;
144     PCIDevice *pd = PCI_DEVICE(d);
145
146     memory_region_transaction_begin();
147     for (i = 0; i < 13; i++) {
148         pam_update(&d->pam_regions[i], i,
149                    pd->config[I440FX_PAM + ((i + 1) / 2)]);
150     }
151     memory_region_set_enabled(&d->smram_region,
152                               !(pd->config[I440FX_SMRAM] & SMRAM_D_OPEN));
153     memory_region_set_enabled(&d->smram,
154                               pd->config[I440FX_SMRAM] & SMRAM_G_SMRAME);
155     memory_region_transaction_commit();
156 }
157
158
159 static void i440fx_write_config(PCIDevice *dev,
160                                 uint32_t address, uint32_t val, int len)
161 {
162     PCII440FXState *d = I440FX_PCI_DEVICE(dev);
163
164     /* XXX: implement SMRAM.D_LOCK */
165     pci_default_write_config(dev, address, val, len);
166     if (ranges_overlap(address, len, I440FX_PAM, I440FX_PAM_SIZE) ||
167         range_covers_byte(address, len, I440FX_SMRAM)) {
168         i440fx_update_memory_mappings(d);
169     }
170 }
171
172 static int i440fx_load_old(QEMUFile* f, void *opaque, int version_id)
173 {
174     PCII440FXState *d = opaque;
175     PCIDevice *pd = PCI_DEVICE(d);
176     int ret, i;
177     uint8_t smm_enabled;
178
179     ret = pci_device_load(pd, f);
180     if (ret < 0)
181         return ret;
182     i440fx_update_memory_mappings(d);
183     qemu_get_8s(f, &smm_enabled);
184
185     if (version_id == 2) {
186         for (i = 0; i < PIIX_NUM_PIRQS; i++) {
187             qemu_get_be32(f); /* dummy load for compatibility */
188         }
189     }
190
191     return 0;
192 }
193
194 static int i440fx_post_load(void *opaque, int version_id)
195 {
196     PCII440FXState *d = opaque;
197
198     i440fx_update_memory_mappings(d);
199     return 0;
200 }
201
202 static const VMStateDescription vmstate_i440fx = {
203     .name = "I440FX",
204     .version_id = 3,
205     .minimum_version_id = 3,
206     .minimum_version_id_old = 1,
207     .load_state_old = i440fx_load_old,
208     .post_load = i440fx_post_load,
209     .fields = (VMStateField[]) {
210         VMSTATE_PCI_DEVICE(parent_obj, PCII440FXState),
211         /* Used to be smm_enabled, which was basically always zero because
212          * SeaBIOS hardly uses SMM.  SMRAM is now handled by CPU code.
213          */
214         VMSTATE_UNUSED(1),
215         VMSTATE_END_OF_LIST()
216     }
217 };
218
219 static void i440fx_pcihost_get_pci_hole_start(Object *obj, Visitor *v,
220                                               const char *name, void *opaque,
221                                               Error **errp)
222 {
223     I440FXState *s = I440FX_PCI_HOST_BRIDGE(obj);
224     uint64_t val64;
225     uint32_t value;
226
227     val64 = range_is_empty(&s->pci_hole) ? 0 : range_lob(&s->pci_hole);
228     value = val64;
229     assert(value == val64);
230     visit_type_uint32(v, name, &value, errp);
231 }
232
233 static void i440fx_pcihost_get_pci_hole_end(Object *obj, Visitor *v,
234                                             const char *name, void *opaque,
235                                             Error **errp)
236 {
237     I440FXState *s = I440FX_PCI_HOST_BRIDGE(obj);
238     uint64_t val64;
239     uint32_t value;
240
241     val64 = range_is_empty(&s->pci_hole) ? 0 : range_upb(&s->pci_hole) + 1;
242     value = val64;
243     assert(value == val64);
244     visit_type_uint32(v, name, &value, errp);
245 }
246
247 static void i440fx_pcihost_get_pci_hole64_start(Object *obj, Visitor *v,
248                                                 const char *name,
249                                                 void *opaque, Error **errp)
250 {
251     PCIHostState *h = PCI_HOST_BRIDGE(obj);
252     Range w64;
253     uint64_t value;
254
255     pci_bus_get_w64_range(h->bus, &w64);
256     value = range_is_empty(&w64) ? 0 : range_lob(&w64);
257     visit_type_uint64(v, name, &value, errp);
258 }
259
260 static void i440fx_pcihost_get_pci_hole64_end(Object *obj, Visitor *v,
261                                               const char *name, void *opaque,
262                                               Error **errp)
263 {
264     PCIHostState *h = PCI_HOST_BRIDGE(obj);
265     Range w64;
266     uint64_t value;
267
268     pci_bus_get_w64_range(h->bus, &w64);
269     value = range_is_empty(&w64) ? 0 : range_upb(&w64) + 1;
270     visit_type_uint64(v, name, &value, errp);
271 }
272
273 static void i440fx_pcihost_initfn(Object *obj)
274 {
275     PCIHostState *s = PCI_HOST_BRIDGE(obj);
276
277     memory_region_init_io(&s->conf_mem, obj, &pci_host_conf_le_ops, s,
278                           "pci-conf-idx", 4);
279     memory_region_init_io(&s->data_mem, obj, &pci_host_data_le_ops, s,
280                           "pci-conf-data", 4);
281
282     object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "int",
283                         i440fx_pcihost_get_pci_hole_start,
284                         NULL, NULL, NULL, NULL);
285
286     object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "int",
287                         i440fx_pcihost_get_pci_hole_end,
288                         NULL, NULL, NULL, NULL);
289
290     object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "int",
291                         i440fx_pcihost_get_pci_hole64_start,
292                         NULL, NULL, NULL, NULL);
293
294     object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "int",
295                         i440fx_pcihost_get_pci_hole64_end,
296                         NULL, NULL, NULL, NULL);
297 }
298
299 static void i440fx_pcihost_realize(DeviceState *dev, Error **errp)
300 {
301     PCIHostState *s = PCI_HOST_BRIDGE(dev);
302     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
303
304     sysbus_add_io(sbd, 0xcf8, &s->conf_mem);
305     sysbus_init_ioports(sbd, 0xcf8, 4);
306
307     sysbus_add_io(sbd, 0xcfc, &s->data_mem);
308     sysbus_init_ioports(sbd, 0xcfc, 4);
309 }
310
311 static void i440fx_realize(PCIDevice *dev, Error **errp)
312 {
313     dev->config[I440FX_SMRAM] = 0x02;
314
315     if (object_property_get_bool(qdev_get_machine(), "iommu", NULL)) {
316         error_report("warning: i440fx doesn't support emulated iommu");
317     }
318 }
319
320 PCIBus *i440fx_init(const char *host_type, const char *pci_type,
321                     PCII440FXState **pi440fx_state,
322                     int *piix3_devfn,
323                     ISABus **isa_bus, qemu_irq *pic,
324                     MemoryRegion *address_space_mem,
325                     MemoryRegion *address_space_io,
326                     ram_addr_t ram_size,
327                     ram_addr_t below_4g_mem_size,
328                     ram_addr_t above_4g_mem_size,
329                     MemoryRegion *pci_address_space,
330                     MemoryRegion *ram_memory)
331 {
332     DeviceState *dev;
333     PCIBus *b;
334     PCIDevice *d;
335     PCIHostState *s;
336     PIIX3State *piix3;
337     PCII440FXState *f;
338     unsigned i;
339     I440FXState *i440fx;
340
341     dev = qdev_create(NULL, host_type);
342     s = PCI_HOST_BRIDGE(dev);
343     b = pci_bus_new(dev, NULL, pci_address_space,
344                     address_space_io, 0, TYPE_PCI_BUS);
345     s->bus = b;
346     object_property_add_child(qdev_get_machine(), "i440fx", OBJECT(dev), NULL);
347     qdev_init_nofail(dev);
348
349     d = pci_create_simple(b, 0, pci_type);
350     *pi440fx_state = I440FX_PCI_DEVICE(d);
351     f = *pi440fx_state;
352     f->system_memory = address_space_mem;
353     f->pci_address_space = pci_address_space;
354     f->ram_memory = ram_memory;
355
356     i440fx = I440FX_PCI_HOST_BRIDGE(dev);
357     range_set_bounds(&i440fx->pci_hole, below_4g_mem_size,
358                      IO_APIC_DEFAULT_ADDRESS - 1);
359
360     /* setup pci memory mapping */
361     pc_pci_as_mapping_init(OBJECT(f), f->system_memory,
362                            f->pci_address_space);
363
364     /* if *disabled* show SMRAM to all CPUs */
365     memory_region_init_alias(&f->smram_region, OBJECT(d), "smram-region",
366                              f->pci_address_space, 0xa0000, 0x20000);
367     memory_region_add_subregion_overlap(f->system_memory, 0xa0000,
368                                         &f->smram_region, 1);
369     memory_region_set_enabled(&f->smram_region, true);
370
371     /* smram, as seen by SMM CPUs */
372     memory_region_init(&f->smram, OBJECT(d), "smram", 1ull << 32);
373     memory_region_set_enabled(&f->smram, true);
374     memory_region_init_alias(&f->low_smram, OBJECT(d), "smram-low",
375                              f->ram_memory, 0xa0000, 0x20000);
376     memory_region_set_enabled(&f->low_smram, true);
377     memory_region_add_subregion(&f->smram, 0xa0000, &f->low_smram);
378     object_property_add_const_link(qdev_get_machine(), "smram",
379                                    OBJECT(&f->smram), &error_abort);
380
381     init_pam(dev, f->ram_memory, f->system_memory, f->pci_address_space,
382              &f->pam_regions[0], PAM_BIOS_BASE, PAM_BIOS_SIZE);
383     for (i = 0; i < 12; ++i) {
384         init_pam(dev, f->ram_memory, f->system_memory, f->pci_address_space,
385                  &f->pam_regions[i+1], PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE,
386                  PAM_EXPAN_SIZE);
387     }
388
389     /* Xen supports additional interrupt routes from the PCI devices to
390      * the IOAPIC: the four pins of each PCI device on the bus are also
391      * connected to the IOAPIC directly.
392      * These additional routes can be discovered through ACPI. */
393     if (xen_enabled()) {
394         PCIDevice *pci_dev = pci_create_simple_multifunction(b,
395                              -1, true, "PIIX3-xen");
396         piix3 = PIIX3_PCI_DEVICE(pci_dev);
397         pci_bus_irqs(b, xen_piix3_set_irq, xen_pci_slot_get_pirq,
398                 piix3, XEN_PIIX_NUM_PIRQS);
399     } else {
400         PCIDevice *pci_dev = pci_create_simple_multifunction(b,
401                              -1, true, "PIIX3");
402         piix3 = PIIX3_PCI_DEVICE(pci_dev);
403         pci_bus_irqs(b, piix3_set_irq, pci_slot_get_pirq, piix3,
404                 PIIX_NUM_PIRQS);
405         pci_bus_set_route_irq_fn(b, piix3_route_intx_pin_to_irq);
406     }
407     piix3->pic = pic;
408     *isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(piix3), "isa.0"));
409
410     *piix3_devfn = piix3->dev.devfn;
411
412     ram_size = ram_size / 8 / 1024 / 1024;
413     if (ram_size > 255) {
414         ram_size = 255;
415     }
416     d->config[I440FX_COREBOOT_RAM_SIZE] = ram_size;
417
418     i440fx_update_memory_mappings(f);
419
420     return b;
421 }
422
423 PCIBus *find_i440fx(void)
424 {
425     PCIHostState *s = OBJECT_CHECK(PCIHostState,
426                                    object_resolve_path("/machine/i440fx", NULL),
427                                    TYPE_PCI_HOST_BRIDGE);
428     return s ? s->bus : NULL;
429 }
430
431 /* PIIX3 PCI to ISA bridge */
432 static void piix3_set_irq_pic(PIIX3State *piix3, int pic_irq)
433 {
434     qemu_set_irq(piix3->pic[pic_irq],
435                  !!(piix3->pic_levels &
436                     (((1ULL << PIIX_NUM_PIRQS) - 1) <<
437                      (pic_irq * PIIX_NUM_PIRQS))));
438 }
439
440 static void piix3_set_irq_level_internal(PIIX3State *piix3, int pirq, int level)
441 {
442     int pic_irq;
443     uint64_t mask;
444
445     pic_irq = piix3->dev.config[PIIX_PIRQC + pirq];
446     if (pic_irq >= PIIX_NUM_PIC_IRQS) {
447         return;
448     }
449
450     mask = 1ULL << ((pic_irq * PIIX_NUM_PIRQS) + pirq);
451     piix3->pic_levels &= ~mask;
452     piix3->pic_levels |= mask * !!level;
453 }
454
455 static void piix3_set_irq_level(PIIX3State *piix3, int pirq, int level)
456 {
457     int pic_irq;
458
459     pic_irq = piix3->dev.config[PIIX_PIRQC + pirq];
460     if (pic_irq >= PIIX_NUM_PIC_IRQS) {
461         return;
462     }
463
464     piix3_set_irq_level_internal(piix3, pirq, level);
465
466     piix3_set_irq_pic(piix3, pic_irq);
467 }
468
469 static void piix3_set_irq(void *opaque, int pirq, int level)
470 {
471     PIIX3State *piix3 = opaque;
472     piix3_set_irq_level(piix3, pirq, level);
473 }
474
475 static PCIINTxRoute piix3_route_intx_pin_to_irq(void *opaque, int pin)
476 {
477     PIIX3State *piix3 = opaque;
478     int irq = piix3->dev.config[PIIX_PIRQC + pin];
479     PCIINTxRoute route;
480
481     if (irq < PIIX_NUM_PIC_IRQS) {
482         route.mode = PCI_INTX_ENABLED;
483         route.irq = irq;
484     } else {
485         route.mode = PCI_INTX_DISABLED;
486         route.irq = -1;
487     }
488     return route;
489 }
490
491 /* irq routing is changed. so rebuild bitmap */
492 static void piix3_update_irq_levels(PIIX3State *piix3)
493 {
494     int pirq;
495
496     piix3->pic_levels = 0;
497     for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) {
498         piix3_set_irq_level(piix3, pirq,
499                             pci_bus_get_irq_level(piix3->dev.bus, pirq));
500     }
501 }
502
503 static void piix3_write_config(PCIDevice *dev,
504                                uint32_t address, uint32_t val, int len)
505 {
506     pci_default_write_config(dev, address, val, len);
507     if (ranges_overlap(address, len, PIIX_PIRQC, 4)) {
508         PIIX3State *piix3 = PIIX3_PCI_DEVICE(dev);
509         int pic_irq;
510
511         pci_bus_fire_intx_routing_notifier(piix3->dev.bus);
512         piix3_update_irq_levels(piix3);
513         for (pic_irq = 0; pic_irq < PIIX_NUM_PIC_IRQS; pic_irq++) {
514             piix3_set_irq_pic(piix3, pic_irq);
515         }
516     }
517 }
518
519 static void piix3_write_config_xen(PCIDevice *dev,
520                                uint32_t address, uint32_t val, int len)
521 {
522     xen_piix_pci_write_config_client(address, val, len);
523     piix3_write_config(dev, address, val, len);
524 }
525
526 static void piix3_reset(void *opaque)
527 {
528     PIIX3State *d = opaque;
529     uint8_t *pci_conf = d->dev.config;
530
531     pci_conf[0x04] = 0x07; /* master, memory and I/O */
532     pci_conf[0x05] = 0x00;
533     pci_conf[0x06] = 0x00;
534     pci_conf[0x07] = 0x02; /* PCI_status_devsel_medium */
535     pci_conf[0x4c] = 0x4d;
536     pci_conf[0x4e] = 0x03;
537     pci_conf[0x4f] = 0x00;
538     pci_conf[0x60] = 0x80;
539     pci_conf[0x61] = 0x80;
540     pci_conf[0x62] = 0x80;
541     pci_conf[0x63] = 0x80;
542     pci_conf[0x69] = 0x02;
543     pci_conf[0x70] = 0x80;
544     pci_conf[0x76] = 0x0c;
545     pci_conf[0x77] = 0x0c;
546     pci_conf[0x78] = 0x02;
547     pci_conf[0x79] = 0x00;
548     pci_conf[0x80] = 0x00;
549     pci_conf[0x82] = 0x00;
550     pci_conf[0xa0] = 0x08;
551     pci_conf[0xa2] = 0x00;
552     pci_conf[0xa3] = 0x00;
553     pci_conf[0xa4] = 0x00;
554     pci_conf[0xa5] = 0x00;
555     pci_conf[0xa6] = 0x00;
556     pci_conf[0xa7] = 0x00;
557     pci_conf[0xa8] = 0x0f;
558     pci_conf[0xaa] = 0x00;
559     pci_conf[0xab] = 0x00;
560     pci_conf[0xac] = 0x00;
561     pci_conf[0xae] = 0x00;
562
563     d->pic_levels = 0;
564     d->rcr = 0;
565 }
566
567 static int piix3_post_load(void *opaque, int version_id)
568 {
569     PIIX3State *piix3 = opaque;
570     int pirq;
571
572     /* Because the i8259 has not been deserialized yet, qemu_irq_raise
573      * might bring the system to a different state than the saved one;
574      * for example, the interrupt could be masked but the i8259 would
575      * not know that yet and would trigger an interrupt in the CPU.
576      *
577      * Here, we update irq levels without raising the interrupt.
578      * Interrupt state will be deserialized separately through the i8259.
579      */
580     piix3->pic_levels = 0;
581     for (pirq = 0; pirq < PIIX_NUM_PIRQS; pirq++) {
582         piix3_set_irq_level_internal(piix3, pirq,
583                             pci_bus_get_irq_level(piix3->dev.bus, pirq));
584     }
585     return 0;
586 }
587
588 static void piix3_pre_save(void *opaque)
589 {
590     int i;
591     PIIX3State *piix3 = opaque;
592
593     for (i = 0; i < ARRAY_SIZE(piix3->pci_irq_levels_vmstate); i++) {
594         piix3->pci_irq_levels_vmstate[i] =
595             pci_bus_get_irq_level(piix3->dev.bus, i);
596     }
597 }
598
599 static bool piix3_rcr_needed(void *opaque)
600 {
601     PIIX3State *piix3 = opaque;
602
603     return (piix3->rcr != 0);
604 }
605
606 static const VMStateDescription vmstate_piix3_rcr = {
607     .name = "PIIX3/rcr",
608     .version_id = 1,
609     .minimum_version_id = 1,
610     .needed = piix3_rcr_needed,
611     .fields = (VMStateField[]) {
612         VMSTATE_UINT8(rcr, PIIX3State),
613         VMSTATE_END_OF_LIST()
614     }
615 };
616
617 static const VMStateDescription vmstate_piix3 = {
618     .name = "PIIX3",
619     .version_id = 3,
620     .minimum_version_id = 2,
621     .post_load = piix3_post_load,
622     .pre_save = piix3_pre_save,
623     .fields = (VMStateField[]) {
624         VMSTATE_PCI_DEVICE(dev, PIIX3State),
625         VMSTATE_INT32_ARRAY_V(pci_irq_levels_vmstate, PIIX3State,
626                               PIIX_NUM_PIRQS, 3),
627         VMSTATE_END_OF_LIST()
628     },
629     .subsections = (const VMStateDescription*[]) {
630         &vmstate_piix3_rcr,
631         NULL
632     }
633 };
634
635
636 static void rcr_write(void *opaque, hwaddr addr, uint64_t val, unsigned len)
637 {
638     PIIX3State *d = opaque;
639
640     if (val & 4) {
641         qemu_system_reset_request();
642         return;
643     }
644     d->rcr = val & 2; /* keep System Reset type only */
645 }
646
647 static uint64_t rcr_read(void *opaque, hwaddr addr, unsigned len)
648 {
649     PIIX3State *d = opaque;
650
651     return d->rcr;
652 }
653
654 static const MemoryRegionOps rcr_ops = {
655     .read = rcr_read,
656     .write = rcr_write,
657     .endianness = DEVICE_LITTLE_ENDIAN
658 };
659
660 static void piix3_realize(PCIDevice *dev, Error **errp)
661 {
662     PIIX3State *d = PIIX3_PCI_DEVICE(dev);
663
664     if (!isa_bus_new(DEVICE(d), get_system_memory(),
665                      pci_address_space_io(dev), errp)) {
666         return;
667     }
668
669     memory_region_init_io(&d->rcr_mem, OBJECT(dev), &rcr_ops, d,
670                           "piix3-reset-control", 1);
671     memory_region_add_subregion_overlap(pci_address_space_io(dev), RCR_IOPORT,
672                                         &d->rcr_mem, 1);
673
674     qemu_register_reset(piix3_reset, d);
675 }
676
677 static void pci_piix3_class_init(ObjectClass *klass, void *data)
678 {
679     DeviceClass *dc = DEVICE_CLASS(klass);
680     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
681
682     dc->desc        = "ISA bridge";
683     dc->vmsd        = &vmstate_piix3;
684     dc->hotpluggable   = false;
685     k->realize      = piix3_realize;
686     k->vendor_id    = PCI_VENDOR_ID_INTEL;
687     /* 82371SB PIIX3 PCI-to-ISA bridge (Step A1) */
688     k->device_id    = PCI_DEVICE_ID_INTEL_82371SB_0;
689     k->class_id     = PCI_CLASS_BRIDGE_ISA;
690     /*
691      * Reason: part of PIIX3 southbridge, needs to be wired up by
692      * pc_piix.c's pc_init1()
693      */
694     dc->cannot_instantiate_with_device_add_yet = true;
695 }
696
697 static const TypeInfo piix3_pci_type_info = {
698     .name = TYPE_PIIX3_PCI_DEVICE,
699     .parent = TYPE_PCI_DEVICE,
700     .instance_size = sizeof(PIIX3State),
701     .abstract = true,
702     .class_init = pci_piix3_class_init,
703 };
704
705 static void piix3_class_init(ObjectClass *klass, void *data)
706 {
707     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
708
709     k->config_write = piix3_write_config;
710 }
711
712 static const TypeInfo piix3_info = {
713     .name          = "PIIX3",
714     .parent        = TYPE_PIIX3_PCI_DEVICE,
715     .class_init    = piix3_class_init,
716 };
717
718 static void piix3_xen_class_init(ObjectClass *klass, void *data)
719 {
720     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
721
722     k->config_write = piix3_write_config_xen;
723 };
724
725 static const TypeInfo piix3_xen_info = {
726     .name          = "PIIX3-xen",
727     .parent        = TYPE_PIIX3_PCI_DEVICE,
728     .class_init    = piix3_xen_class_init,
729 };
730
731 static void i440fx_class_init(ObjectClass *klass, void *data)
732 {
733     DeviceClass *dc = DEVICE_CLASS(klass);
734     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
735
736     k->realize = i440fx_realize;
737     k->config_write = i440fx_write_config;
738     k->vendor_id = PCI_VENDOR_ID_INTEL;
739     k->device_id = PCI_DEVICE_ID_INTEL_82441;
740     k->revision = 0x02;
741     k->class_id = PCI_CLASS_BRIDGE_HOST;
742     dc->desc = "Host bridge";
743     dc->vmsd = &vmstate_i440fx;
744     /*
745      * PCI-facing part of the host bridge, not usable without the
746      * host-facing part, which can't be device_add'ed, yet.
747      */
748     dc->cannot_instantiate_with_device_add_yet = true;
749     dc->hotpluggable   = false;
750 }
751
752 static const TypeInfo i440fx_info = {
753     .name          = TYPE_I440FX_PCI_DEVICE,
754     .parent        = TYPE_PCI_DEVICE,
755     .instance_size = sizeof(PCII440FXState),
756     .class_init    = i440fx_class_init,
757 };
758
759 /* IGD Passthrough Host Bridge. */
760 typedef struct {
761     uint8_t offset;
762     uint8_t len;
763 } IGDHostInfo;
764
765 /* Here we just expose minimal host bridge offset subset. */
766 static const IGDHostInfo igd_host_bridge_infos[] = {
767     {0x08, 2},  /* revision id */
768     {0x2c, 2},  /* sybsystem vendor id */
769     {0x2e, 2},  /* sybsystem id */
770     {0x50, 2},  /* SNB: processor graphics control register */
771     {0x52, 2},  /* processor graphics control register */
772     {0xa4, 4},  /* SNB: graphics base of stolen memory */
773     {0xa8, 4},  /* SNB: base of GTT stolen memory */
774 };
775
776 static int host_pci_config_read(int pos, int len, uint32_t *val)
777 {
778     char path[PATH_MAX];
779     int config_fd;
780     ssize_t size = sizeof(path);
781     /* Access real host bridge. */
782     int rc = snprintf(path, size, "/sys/bus/pci/devices/%04x:%02x:%02x.%d/%s",
783                       0, 0, 0, 0, "config");
784     int ret = 0;
785
786     if (rc >= size || rc < 0) {
787         return -ENODEV;
788     }
789
790     config_fd = open(path, O_RDWR);
791     if (config_fd < 0) {
792         return -ENODEV;
793     }
794
795     if (lseek(config_fd, pos, SEEK_SET) != pos) {
796         ret = -errno;
797         goto out;
798     }
799
800     do {
801         rc = read(config_fd, (uint8_t *)val, len);
802     } while (rc < 0 && (errno == EINTR || errno == EAGAIN));
803     if (rc != len) {
804         ret = -errno;
805     }
806
807 out:
808     close(config_fd);
809     return ret;
810 }
811
812 static int igd_pt_i440fx_initfn(struct PCIDevice *pci_dev)
813 {
814     uint32_t val = 0;
815     int rc, i, num;
816     int pos, len;
817
818     num = ARRAY_SIZE(igd_host_bridge_infos);
819     for (i = 0; i < num; i++) {
820         pos = igd_host_bridge_infos[i].offset;
821         len = igd_host_bridge_infos[i].len;
822         rc = host_pci_config_read(pos, len, &val);
823         if (rc) {
824             return -ENODEV;
825         }
826         pci_default_write_config(pci_dev, pos, val, len);
827     }
828
829     return 0;
830 }
831
832 static void igd_passthrough_i440fx_class_init(ObjectClass *klass, void *data)
833 {
834     DeviceClass *dc = DEVICE_CLASS(klass);
835     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
836
837     k->init = igd_pt_i440fx_initfn;
838     dc->desc = "IGD Passthrough Host bridge";
839 }
840
841 static const TypeInfo igd_passthrough_i440fx_info = {
842     .name          = TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE,
843     .parent        = TYPE_I440FX_PCI_DEVICE,
844     .instance_size = sizeof(PCII440FXState),
845     .class_init    = igd_passthrough_i440fx_class_init,
846 };
847
848 static const char *i440fx_pcihost_root_bus_path(PCIHostState *host_bridge,
849                                                 PCIBus *rootbus)
850 {
851     I440FXState *s = I440FX_PCI_HOST_BRIDGE(host_bridge);
852
853     /* For backwards compat with old device paths */
854     if (s->short_root_bus) {
855         return "0000";
856     }
857     return "0000:00";
858 }
859
860 static Property i440fx_props[] = {
861     DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, I440FXState,
862                      pci_hole64_size, DEFAULT_PCI_HOLE64_SIZE),
863     DEFINE_PROP_UINT32("short_root_bus", I440FXState, short_root_bus, 0),
864     DEFINE_PROP_END_OF_LIST(),
865 };
866
867 static void i440fx_pcihost_class_init(ObjectClass *klass, void *data)
868 {
869     DeviceClass *dc = DEVICE_CLASS(klass);
870     PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
871
872     hc->root_bus_path = i440fx_pcihost_root_bus_path;
873     dc->realize = i440fx_pcihost_realize;
874     dc->fw_name = "pci";
875     dc->props = i440fx_props;
876     /* Reason: needs to be wired up by pc_init1 */
877     dc->cannot_instantiate_with_device_add_yet = true;
878 }
879
880 static const TypeInfo i440fx_pcihost_info = {
881     .name          = TYPE_I440FX_PCI_HOST_BRIDGE,
882     .parent        = TYPE_PCI_HOST_BRIDGE,
883     .instance_size = sizeof(I440FXState),
884     .instance_init = i440fx_pcihost_initfn,
885     .class_init    = i440fx_pcihost_class_init,
886 };
887
888 static void i440fx_register_types(void)
889 {
890     type_register_static(&i440fx_info);
891     type_register_static(&igd_passthrough_i440fx_info);
892     type_register_static(&piix3_pci_type_info);
893     type_register_static(&piix3_info);
894     type_register_static(&piix3_xen_info);
895     type_register_static(&i440fx_pcihost_info);
896 }
897
898 type_init(i440fx_register_types)
This page took 0.077657 seconds and 4 git commands to generate.