4 * Copyright (c) 2004 Fabrice Bellard
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:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
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
28 #include "virtio-net.h"
35 pci_set_irq_fn set_irq
;
36 pci_map_irq_fn map_irq
;
37 uint32_t config_reg
; /* XXX: suppress */
39 SetIRQFunc
*low_set_irq
;
41 PCIDevice
*devices
[256];
42 PCIDevice
*parent_dev
;
44 /* The bus IRQ state is the logical OR of the connected devices.
45 Keep a count of the number of devices with raised IRQs. */
50 static void pci_update_mappings(PCIDevice
*d
);
51 static void pci_set_irq(void *opaque
, int irq_num
, int level
);
53 target_phys_addr_t pci_mem_base
;
54 static uint16_t pci_default_sub_vendor_id
= PCI_SUBVENDOR_ID_REDHAT_QUMRANET
;
55 static uint16_t pci_default_sub_device_id
= PCI_SUBDEVICE_ID_QEMU
;
56 static int pci_irq_index
;
57 static PCIBus
*first_bus
;
59 static void pcibus_save(QEMUFile
*f
, void *opaque
)
61 PCIBus
*bus
= (PCIBus
*)opaque
;
64 qemu_put_be32(f
, bus
->nirq
);
65 for (i
= 0; i
< bus
->nirq
; i
++)
66 qemu_put_be32(f
, bus
->irq_count
[i
]);
69 static int pcibus_load(QEMUFile
*f
, void *opaque
, int version_id
)
71 PCIBus
*bus
= (PCIBus
*)opaque
;
77 nirq
= qemu_get_be32(f
);
78 if (bus
->nirq
!= nirq
) {
79 fprintf(stderr
, "pcibus_load: nirq mismatch: src=%d dst=%d\n",
84 for (i
= 0; i
< nirq
; i
++)
85 bus
->irq_count
[i
] = qemu_get_be32(f
);
90 PCIBus
*pci_register_bus(pci_set_irq_fn set_irq
, pci_map_irq_fn map_irq
,
91 qemu_irq
*pic
, int devfn_min
, int nirq
)
96 bus
= qemu_mallocz(sizeof(PCIBus
) + (nirq
* sizeof(int)));
97 bus
->set_irq
= set_irq
;
98 bus
->map_irq
= map_irq
;
99 bus
->irq_opaque
= pic
;
100 bus
->devfn_min
= devfn_min
;
103 register_savevm("PCIBUS", nbus
++, 1, pcibus_save
, pcibus_load
, bus
);
107 static PCIBus
*pci_register_secondary_bus(PCIDevice
*dev
, pci_map_irq_fn map_irq
)
110 bus
= qemu_mallocz(sizeof(PCIBus
));
111 bus
->map_irq
= map_irq
;
112 bus
->parent_dev
= dev
;
113 bus
->next
= dev
->bus
->next
;
114 dev
->bus
->next
= bus
;
118 int pci_bus_num(PCIBus
*s
)
123 void pci_device_save(PCIDevice
*s
, QEMUFile
*f
)
127 qemu_put_be32(f
, 2); /* PCI device version */
128 qemu_put_buffer(f
, s
->config
, 256);
129 for (i
= 0; i
< 4; i
++)
130 qemu_put_be32(f
, s
->irq_state
[i
]);
133 int pci_device_load(PCIDevice
*s
, QEMUFile
*f
)
138 version_id
= qemu_get_be32(f
);
141 qemu_get_buffer(f
, s
->config
, 256);
142 pci_update_mappings(s
);
145 for (i
= 0; i
< 4; i
++)
146 s
->irq_state
[i
] = qemu_get_be32(f
);
151 static int pci_set_default_subsystem_id(PCIDevice
*pci_dev
)
155 id
= (void*)(&pci_dev
->config
[PCI_SUBVENDOR_ID
]);
156 id
[0] = cpu_to_le16(pci_default_sub_vendor_id
);
157 id
[1] = cpu_to_le16(pci_default_sub_device_id
);
161 /* -1 for devfn means auto assign */
162 PCIDevice
*pci_register_device(PCIBus
*bus
, const char *name
,
163 int instance_size
, int devfn
,
164 PCIConfigReadFunc
*config_read
,
165 PCIConfigWriteFunc
*config_write
)
169 if (pci_irq_index
>= PCI_DEVICES_MAX
)
173 for(devfn
= bus
->devfn_min
; devfn
< 256; devfn
+= 8) {
174 if (!bus
->devices
[devfn
])
180 pci_dev
= qemu_mallocz(instance_size
);
182 pci_dev
->devfn
= devfn
;
183 pstrcpy(pci_dev
->name
, sizeof(pci_dev
->name
), name
);
184 memset(pci_dev
->irq_state
, 0, sizeof(pci_dev
->irq_state
));
185 pci_set_default_subsystem_id(pci_dev
);
188 config_read
= pci_default_read_config
;
190 config_write
= pci_default_write_config
;
191 pci_dev
->config_read
= config_read
;
192 pci_dev
->config_write
= config_write
;
193 pci_dev
->irq_index
= pci_irq_index
++;
194 bus
->devices
[devfn
] = pci_dev
;
195 pci_dev
->irq
= qemu_allocate_irqs(pci_set_irq
, pci_dev
, 4);
199 static target_phys_addr_t
pci_to_cpu_addr(target_phys_addr_t addr
)
201 return addr
+ pci_mem_base
;
204 static void pci_unregister_io_regions(PCIDevice
*pci_dev
)
209 for(i
= 0; i
< PCI_NUM_REGIONS
; i
++) {
210 r
= &pci_dev
->io_regions
[i
];
211 if (!r
->size
|| r
->addr
== -1)
213 if (r
->type
== PCI_ADDRESS_SPACE_IO
) {
214 isa_unassign_ioport(r
->addr
, r
->size
);
216 cpu_register_physical_memory(pci_to_cpu_addr(r
->addr
),
223 int pci_unregister_device(PCIDevice
*pci_dev
)
227 if (pci_dev
->unregister
)
228 ret
= pci_dev
->unregister(pci_dev
);
232 pci_unregister_io_regions(pci_dev
);
234 qemu_free_irqs(pci_dev
->irq
);
236 pci_dev
->bus
->devices
[pci_dev
->devfn
] = NULL
;
241 void pci_register_io_region(PCIDevice
*pci_dev
, int region_num
,
242 uint32_t size
, int type
,
243 PCIMapIORegionFunc
*map_func
)
248 if ((unsigned int)region_num
>= PCI_NUM_REGIONS
)
250 r
= &pci_dev
->io_regions
[region_num
];
254 r
->map_func
= map_func
;
255 if (region_num
== PCI_ROM_SLOT
) {
258 addr
= 0x10 + region_num
* 4;
260 *(uint32_t *)(pci_dev
->config
+ addr
) = cpu_to_le32(type
);
263 static void pci_update_mappings(PCIDevice
*d
)
267 uint32_t last_addr
, new_addr
, config_ofs
;
269 cmd
= le16_to_cpu(*(uint16_t *)(d
->config
+ PCI_COMMAND
));
270 for(i
= 0; i
< PCI_NUM_REGIONS
; i
++) {
271 r
= &d
->io_regions
[i
];
272 if (i
== PCI_ROM_SLOT
) {
275 config_ofs
= 0x10 + i
* 4;
278 if (r
->type
& PCI_ADDRESS_SPACE_IO
) {
279 if (cmd
& PCI_COMMAND_IO
) {
280 new_addr
= le32_to_cpu(*(uint32_t *)(d
->config
+
282 new_addr
= new_addr
& ~(r
->size
- 1);
283 last_addr
= new_addr
+ r
->size
- 1;
284 /* NOTE: we have only 64K ioports on PC */
285 if (last_addr
<= new_addr
|| new_addr
== 0 ||
286 last_addr
>= 0x10000) {
293 if (cmd
& PCI_COMMAND_MEMORY
) {
294 new_addr
= le32_to_cpu(*(uint32_t *)(d
->config
+
296 /* the ROM slot has a specific enable bit */
297 if (i
== PCI_ROM_SLOT
&& !(new_addr
& 1))
299 new_addr
= new_addr
& ~(r
->size
- 1);
300 last_addr
= new_addr
+ r
->size
- 1;
301 /* NOTE: we do not support wrapping */
302 /* XXX: as we cannot support really dynamic
303 mappings, we handle specific values as invalid
305 if (last_addr
<= new_addr
|| new_addr
== 0 ||
314 /* now do the real mapping */
315 if (new_addr
!= r
->addr
) {
317 if (r
->type
& PCI_ADDRESS_SPACE_IO
) {
319 /* NOTE: specific hack for IDE in PC case:
320 only one byte must be mapped. */
321 class = d
->config
[0x0a] | (d
->config
[0x0b] << 8);
322 if (class == 0x0101 && r
->size
== 4) {
323 isa_unassign_ioport(r
->addr
+ 2, 1);
325 isa_unassign_ioport(r
->addr
, r
->size
);
328 cpu_register_physical_memory(pci_to_cpu_addr(r
->addr
),
331 qemu_unregister_coalesced_mmio(r
->addr
, r
->size
);
336 r
->map_func(d
, i
, r
->addr
, r
->size
, r
->type
);
343 uint32_t pci_default_read_config(PCIDevice
*d
,
344 uint32_t address
, int len
)
351 if (address
<= 0xfc) {
352 val
= le32_to_cpu(*(uint32_t *)(d
->config
+ address
));
357 if (address
<= 0xfe) {
358 val
= le16_to_cpu(*(uint16_t *)(d
->config
+ address
));
363 val
= d
->config
[address
];
369 void pci_default_write_config(PCIDevice
*d
,
370 uint32_t address
, uint32_t val
, int len
)
375 if (len
== 4 && ((address
>= 0x10 && address
< 0x10 + 4 * 6) ||
376 (address
>= 0x30 && address
< 0x34))) {
380 if ( address
>= 0x30 ) {
383 reg
= (address
- 0x10) >> 2;
385 r
= &d
->io_regions
[reg
];
388 /* compute the stored value */
389 if (reg
== PCI_ROM_SLOT
) {
390 /* keep ROM enable bit */
391 val
&= (~(r
->size
- 1)) | 1;
393 val
&= ~(r
->size
- 1);
396 *(uint32_t *)(d
->config
+ address
) = cpu_to_le32(val
);
397 pci_update_mappings(d
);
401 /* not efficient, but simple */
403 for(i
= 0; i
< len
; i
++) {
404 /* default read/write accesses */
405 switch(d
->config
[0x0e]) {
418 case 0x10 ... 0x27: /* base */
419 case 0x2c ... 0x2f: /* read-only subsystem ID & vendor ID */
420 case 0x30 ... 0x33: /* rom */
441 case 0x2c ... 0x2f: /* read-only subsystem ID & vendor ID */
442 case 0x38 ... 0x3b: /* rom */
453 /* Mask out writes to reserved bits in registers */
456 val
&= ~PCI_COMMAND_RESERVED_MASK_HI
;
459 val
&= ~PCI_STATUS_RESERVED_MASK_LO
;
462 val
&= ~PCI_STATUS_RESERVED_MASK_HI
;
465 d
->config
[addr
] = val
;
473 if (end
> PCI_COMMAND
&& address
< (PCI_COMMAND
+ 2)) {
474 /* if the command register is modified, we must modify the mappings */
475 pci_update_mappings(d
);
479 void pci_data_write(void *opaque
, uint32_t addr
, uint32_t val
, int len
)
483 int config_addr
, bus_num
;
485 #if defined(DEBUG_PCI) && 0
486 printf("pci_data_write: addr=%08x val=%08x len=%d\n",
489 bus_num
= (addr
>> 16) & 0xff;
490 while (s
&& s
->bus_num
!= bus_num
)
494 pci_dev
= s
->devices
[(addr
>> 8) & 0xff];
497 config_addr
= addr
& 0xff;
498 #if defined(DEBUG_PCI)
499 printf("pci_config_write: %s: addr=%02x val=%08x len=%d\n",
500 pci_dev
->name
, config_addr
, val
, len
);
502 pci_dev
->config_write(pci_dev
, config_addr
, val
, len
);
505 uint32_t pci_data_read(void *opaque
, uint32_t addr
, int len
)
509 int config_addr
, bus_num
;
512 bus_num
= (addr
>> 16) & 0xff;
513 while (s
&& s
->bus_num
!= bus_num
)
517 pci_dev
= s
->devices
[(addr
>> 8) & 0xff];
534 config_addr
= addr
& 0xff;
535 val
= pci_dev
->config_read(pci_dev
, config_addr
, len
);
536 #if defined(DEBUG_PCI)
537 printf("pci_config_read: %s: addr=%02x val=%08x len=%d\n",
538 pci_dev
->name
, config_addr
, val
, len
);
541 #if defined(DEBUG_PCI) && 0
542 printf("pci_data_read: addr=%08x val=%08x len=%d\n",
548 /***********************************************************/
549 /* generic PCI irq support */
551 /* 0 <= irq_num <= 3. level must be 0 or 1 */
552 static void pci_set_irq(void *opaque
, int irq_num
, int level
)
554 PCIDevice
*pci_dev
= (PCIDevice
*)opaque
;
558 change
= level
- pci_dev
->irq_state
[irq_num
];
562 pci_dev
->irq_state
[irq_num
] = level
;
565 irq_num
= bus
->map_irq(pci_dev
, irq_num
);
568 pci_dev
= bus
->parent_dev
;
570 bus
->irq_count
[irq_num
] += change
;
571 bus
->set_irq(bus
->irq_opaque
, irq_num
, bus
->irq_count
[irq_num
] != 0);
574 /***********************************************************/
575 /* monitor info on PCI */
582 static const pci_class_desc pci_class_descriptions
[] =
584 { 0x0100, "SCSI controller"},
585 { 0x0101, "IDE controller"},
586 { 0x0102, "Floppy controller"},
587 { 0x0103, "IPI controller"},
588 { 0x0104, "RAID controller"},
589 { 0x0106, "SATA controller"},
590 { 0x0107, "SAS controller"},
591 { 0x0180, "Storage controller"},
592 { 0x0200, "Ethernet controller"},
593 { 0x0201, "Token Ring controller"},
594 { 0x0202, "FDDI controller"},
595 { 0x0203, "ATM controller"},
596 { 0x0280, "Network controller"},
597 { 0x0300, "VGA controller"},
598 { 0x0301, "XGA controller"},
599 { 0x0302, "3D controller"},
600 { 0x0380, "Display controller"},
601 { 0x0400, "Video controller"},
602 { 0x0401, "Audio controller"},
604 { 0x0480, "Multimedia controller"},
605 { 0x0500, "RAM controller"},
606 { 0x0501, "Flash controller"},
607 { 0x0580, "Memory controller"},
608 { 0x0600, "Host bridge"},
609 { 0x0601, "ISA bridge"},
610 { 0x0602, "EISA bridge"},
611 { 0x0603, "MC bridge"},
612 { 0x0604, "PCI bridge"},
613 { 0x0605, "PCMCIA bridge"},
614 { 0x0606, "NUBUS bridge"},
615 { 0x0607, "CARDBUS bridge"},
616 { 0x0608, "RACEWAY bridge"},
618 { 0x0c03, "USB controller"},
622 static void pci_info_device(PCIDevice
*d
)
626 const pci_class_desc
*desc
;
628 term_printf(" Bus %2d, device %3d, function %d:\n",
629 d
->bus
->bus_num
, d
->devfn
>> 3, d
->devfn
& 7);
630 class = le16_to_cpu(*((uint16_t *)(d
->config
+ PCI_CLASS_DEVICE
)));
632 desc
= pci_class_descriptions
;
633 while (desc
->desc
&& class != desc
->class)
636 term_printf("%s", desc
->desc
);
638 term_printf("Class %04x", class);
640 term_printf(": PCI device %04x:%04x\n",
641 le16_to_cpu(*((uint16_t *)(d
->config
+ PCI_VENDOR_ID
))),
642 le16_to_cpu(*((uint16_t *)(d
->config
+ PCI_DEVICE_ID
))));
644 if (d
->config
[PCI_INTERRUPT_PIN
] != 0) {
645 term_printf(" IRQ %d.\n", d
->config
[PCI_INTERRUPT_LINE
]);
647 if (class == 0x0604) {
648 term_printf(" BUS %d.\n", d
->config
[0x19]);
650 for(i
= 0;i
< PCI_NUM_REGIONS
; i
++) {
651 r
= &d
->io_regions
[i
];
653 term_printf(" BAR%d: ", i
);
654 if (r
->type
& PCI_ADDRESS_SPACE_IO
) {
655 term_printf("I/O at 0x%04x [0x%04x].\n",
656 r
->addr
, r
->addr
+ r
->size
- 1);
658 term_printf("32 bit memory at 0x%08x [0x%08x].\n",
659 r
->addr
, r
->addr
+ r
->size
- 1);
663 if (class == 0x0604 && d
->config
[0x19] != 0) {
664 pci_for_each_device(d
->config
[0x19], pci_info_device
);
668 void pci_for_each_device(int bus_num
, void (*fn
)(PCIDevice
*d
))
670 PCIBus
*bus
= first_bus
;
674 while (bus
&& bus
->bus_num
!= bus_num
)
677 for(devfn
= 0; devfn
< 256; devfn
++) {
678 d
= bus
->devices
[devfn
];
687 pci_for_each_device(0, pci_info_device
);
690 static const char * const pci_nic_models
[] = {
702 typedef PCIDevice
*(*PCINICInitFn
)(PCIBus
*, NICInfo
*, int);
704 static PCINICInitFn pci_nic_init_fns
[] = {
716 /* Initialize a PCI NIC. */
717 PCIDevice
*pci_nic_init(PCIBus
*bus
, NICInfo
*nd
, int devfn
,
718 const char *default_model
)
723 qemu_check_nic_model_list(nd
, pci_nic_models
, default_model
);
725 for (i
= 0; pci_nic_models
[i
]; i
++)
726 if (strcmp(nd
->model
, pci_nic_models
[i
]) == 0) {
727 pci_dev
= pci_nic_init_fns
[i
](bus
, nd
, devfn
);
729 nd
->private = pci_dev
;
741 static void pci_bridge_write_config(PCIDevice
*d
,
742 uint32_t address
, uint32_t val
, int len
)
744 PCIBridge
*s
= (PCIBridge
*)d
;
746 if (address
== 0x19 || (address
== 0x18 && len
> 1)) {
748 s
->bus
->bus_num
= val
& 0xff;
750 s
->bus
->bus_num
= (val
>> 8) & 0xff;
751 #if defined(DEBUG_PCI)
752 printf ("pci-bridge: %s: Assigned bus %d\n", d
->name
, s
->bus
->bus_num
);
755 pci_default_write_config(d
, address
, val
, len
);
758 PCIBus
*pci_find_bus(int bus_num
)
760 PCIBus
*bus
= first_bus
;
762 while (bus
&& bus
->bus_num
!= bus_num
)
768 PCIDevice
*pci_find_device(int bus_num
, int slot
, int function
)
770 PCIBus
*bus
= pci_find_bus(bus_num
);
775 return bus
->devices
[PCI_DEVFN(slot
, function
)];
778 PCIBus
*pci_bridge_init(PCIBus
*bus
, int devfn
, uint16_t vid
, uint16_t did
,
779 pci_map_irq_fn map_irq
, const char *name
)
782 s
= (PCIBridge
*)pci_register_device(bus
, name
, sizeof(PCIBridge
),
783 devfn
, NULL
, pci_bridge_write_config
);
785 pci_config_set_vendor_id(s
->dev
.config
, vid
);
786 pci_config_set_device_id(s
->dev
.config
, did
);
788 s
->dev
.config
[0x04] = 0x06; // command = bus master, pci mem
789 s
->dev
.config
[0x05] = 0x00;
790 s
->dev
.config
[0x06] = 0xa0; // status = fast back-to-back, 66MHz, no error
791 s
->dev
.config
[0x07] = 0x00; // status = fast devsel
792 s
->dev
.config
[0x08] = 0x00; // revision
793 s
->dev
.config
[0x09] = 0x00; // programming i/f
794 pci_config_set_class(s
->dev
.config
, PCI_CLASS_BRIDGE_PCI
);
795 s
->dev
.config
[0x0D] = 0x10; // latency_timer
796 s
->dev
.config
[0x0E] = 0x81; // header_type
797 s
->dev
.config
[0x1E] = 0xa0; // secondary status
799 s
->bus
= pci_register_secondary_bus(&s
->dev
, map_irq
);