4 #include "qemu/osdep.h"
5 #include "qapi/error.h"
7 #include "xen-host-pci-device.h"
8 #include "hw/xen/xen-legacy-backend.h"
10 static unsigned long igd_guest_opregion;
11 static unsigned long igd_host_opregion;
13 #define XEN_PCI_INTEL_OPREGION_MASK 0xfff
15 typedef struct VGARegion {
16 int type; /* Memory or port I/O */
17 uint64_t guest_base_addr;
18 uint64_t machine_base_addr;
19 uint64_t size; /* size of the region */
23 #define IORESOURCE_IO 0x00000100
24 #define IORESOURCE_MEM 0x00000200
26 static struct VGARegion vga_args[] = {
28 .type = IORESOURCE_IO,
29 .guest_base_addr = 0x3B0,
30 .machine_base_addr = 0x3B0,
35 .type = IORESOURCE_IO,
36 .guest_base_addr = 0x3C0,
37 .machine_base_addr = 0x3C0,
42 .type = IORESOURCE_MEM,
43 .guest_base_addr = 0xa0000 >> XC_PAGE_SHIFT,
44 .machine_base_addr = 0xa0000 >> XC_PAGE_SHIFT,
51 * register VGA resources for the domain with assigned gfx
53 int xen_pt_register_vga_regions(XenHostPCIDevice *dev)
57 if (!is_igd_vga_passthrough(dev)) {
61 for (i = 0 ; i < ARRAY_SIZE(vga_args); i++) {
62 if (vga_args[i].type == IORESOURCE_IO) {
63 vga_args[i].rc = xc_domain_ioport_mapping(xen_xc, xen_domid,
64 vga_args[i].guest_base_addr,
65 vga_args[i].machine_base_addr,
66 vga_args[i].size, DPCI_ADD_MAPPING);
68 vga_args[i].rc = xc_domain_memory_mapping(xen_xc, xen_domid,
69 vga_args[i].guest_base_addr,
70 vga_args[i].machine_base_addr,
71 vga_args[i].size, DPCI_ADD_MAPPING);
75 XEN_PT_ERR(NULL, "VGA %s mapping failed! (rc: %i)\n",
76 vga_args[i].type == IORESOURCE_IO ? "ioport" : "memory",
78 return vga_args[i].rc;
86 * unregister VGA resources for the domain with assigned gfx
88 int xen_pt_unregister_vga_regions(XenHostPCIDevice *dev)
93 if (!is_igd_vga_passthrough(dev)) {
97 for (i = 0 ; i < ARRAY_SIZE(vga_args); i++) {
98 if (vga_args[i].type == IORESOURCE_IO) {
99 vga_args[i].rc = xc_domain_ioport_mapping(xen_xc, xen_domid,
100 vga_args[i].guest_base_addr,
101 vga_args[i].machine_base_addr,
102 vga_args[i].size, DPCI_REMOVE_MAPPING);
104 vga_args[i].rc = xc_domain_memory_mapping(xen_xc, xen_domid,
105 vga_args[i].guest_base_addr,
106 vga_args[i].machine_base_addr,
107 vga_args[i].size, DPCI_REMOVE_MAPPING);
110 if (vga_args[i].rc) {
111 XEN_PT_ERR(NULL, "VGA %s unmapping failed! (rc: %i)\n",
112 vga_args[i].type == IORESOURCE_IO ? "ioport" : "memory",
114 return vga_args[i].rc;
118 if (igd_guest_opregion) {
119 ret = xc_domain_memory_mapping(xen_xc, xen_domid,
120 (unsigned long)(igd_guest_opregion >> XC_PAGE_SHIFT),
121 (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT),
123 DPCI_REMOVE_MAPPING);
132 static void *get_vgabios(XenPCIPassthroughState *s, int *size,
133 XenHostPCIDevice *dev)
135 return pci_assign_dev_load_option_rom(&s->dev, size,
136 dev->domain, dev->bus,
137 dev->dev, dev->func);
140 /* Refer to Seabios. */
144 uint8_t initVector[4];
145 uint8_t reserved[17];
148 } __attribute__((packed));
164 } __attribute__((packed));
166 void xen_pt_setup_vga(XenPCIPassthroughState *s, XenHostPCIDevice *dev,
169 unsigned char *bios = NULL;
170 struct rom_header *rom;
175 struct pci_data *pd = NULL;
177 if (!is_igd_vga_passthrough(dev)) {
178 error_setg(errp, "Need to enable igd-passthrough");
182 bios = get_vgabios(s, &bios_size, dev);
184 error_setg(errp, "VGA: Can't get VBIOS");
188 if (bios_size < sizeof(struct rom_header)) {
189 error_setg(errp, "VGA: VBIOS image corrupt (too small)");
193 /* Currently we fixed this address as a primary. */
194 rom = (struct rom_header *)bios;
196 if (rom->pcioffset + sizeof(struct pci_data) > bios_size) {
197 error_setg(errp, "VGA: VBIOS image corrupt (bad pcioffset field)");
201 pd = (void *)(bios + (unsigned char)rom->pcioffset);
203 /* We may need to fixup Device Identification. */
204 if (pd->device != s->real_device.device_id) {
205 pd->device = s->real_device.device_id;
207 len = rom->size * 512;
208 if (len > bios_size) {
209 error_setg(errp, "VGA: VBIOS image corrupt (bad size field)");
213 /* Then adjust the bios checksum */
214 for (c = (char *)bios; c < ((char *)bios + len); c++) {
218 bios[len - 1] -= checksum;
219 XEN_PT_LOG(&s->dev, "vga bios checksum is adjusted %x!\n",
224 /* Currently we fixed this address as a primary for legacy BIOS. */
225 cpu_physical_memory_write(0xc0000, bios, bios_size);
228 uint32_t igd_read_opregion(XenPCIPassthroughState *s)
232 if (!igd_guest_opregion) {
236 val = igd_guest_opregion;
238 XEN_PT_LOG(&s->dev, "Read opregion val=%x\n", val);
242 #define XEN_PCI_INTEL_OPREGION_PAGES 0x3
243 #define XEN_PCI_INTEL_OPREGION_ENABLE_ACCESSED 0x1
244 void igd_write_opregion(XenPCIPassthroughState *s, uint32_t val)
248 if (igd_guest_opregion) {
249 XEN_PT_LOG(&s->dev, "opregion register already been set, ignoring %x\n",
254 /* We just work with LE. */
255 xen_host_pci_get_block(&s->real_device, XEN_PCI_INTEL_OPREGION,
256 (uint8_t *)&igd_host_opregion, 4);
257 igd_guest_opregion = (unsigned long)(val & ~XEN_PCI_INTEL_OPREGION_MASK)
258 | (igd_host_opregion & XEN_PCI_INTEL_OPREGION_MASK);
260 ret = xc_domain_iomem_permission(xen_xc, xen_domid,
261 (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT),
262 XEN_PCI_INTEL_OPREGION_PAGES,
263 XEN_PCI_INTEL_OPREGION_ENABLE_ACCESSED);
266 XEN_PT_ERR(&s->dev, "[%d]:Can't enable to access IGD host opregion:"
268 (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT)),
269 igd_guest_opregion = 0;
273 ret = xc_domain_memory_mapping(xen_xc, xen_domid,
274 (unsigned long)(igd_guest_opregion >> XC_PAGE_SHIFT),
275 (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT),
276 XEN_PCI_INTEL_OPREGION_PAGES,
280 XEN_PT_ERR(&s->dev, "[%d]:Can't map IGD host opregion:0x%lx to"
281 " guest opregion:0x%lx.\n", ret,
282 (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT),
283 (unsigned long)(igd_guest_opregion >> XC_PAGE_SHIFT));
284 igd_guest_opregion = 0;
288 XEN_PT_LOG(&s->dev, "Map OpRegion: 0x%lx -> 0x%lx\n",
289 (unsigned long)(igd_host_opregion >> XC_PAGE_SHIFT),
290 (unsigned long)(igd_guest_opregion >> XC_PAGE_SHIFT));
294 uint16_t gpu_device_id;
295 uint16_t pch_device_id;
296 uint8_t pch_revision_id;
300 * In real world different GPU should have different PCH. But actually
301 * the different PCH DIDs likely map to different PCH SKUs. We do the
302 * same thing for the GPU. For PCH, the different SKUs are going to be
303 * all the same silicon design and implementation, just different
304 * features turn on and off with fuses. The SW interfaces should be
305 * consistent across all SKUs in a given family (eg LPT). But just same
306 * features may not be supported.
308 * Most of these different PCH features probably don't matter to the
309 * Gfx driver, but obviously any difference in display port connections
310 * will so it should be fine with any PCH in case of passthrough.
312 * So currently use one PCH version, 0x8c4e, to cover all HSW(Haswell)
313 * scenarios, 0x9cc3 for BDW(Broadwell).
315 static const IGDDeviceIDInfo igd_combo_id_infos[] = {
317 {0x0402, 0x8c4e, 0x04}, /* HSWGT1D, HSWD_w7 */
318 {0x0406, 0x8c4e, 0x04}, /* HSWGT1M, HSWM_w7 */
319 {0x0412, 0x8c4e, 0x04}, /* HSWGT2D, HSWD_w7 */
320 {0x0416, 0x8c4e, 0x04}, /* HSWGT2M, HSWM_w7 */
321 {0x041E, 0x8c4e, 0x04}, /* HSWGT15D, HSWD_w7 */
323 {0x0A06, 0x8c4e, 0x04}, /* HSWGT1UT, HSWM_w7 */
324 {0x0A16, 0x8c4e, 0x04}, /* HSWGT2UT, HSWM_w7 */
325 {0x0A26, 0x8c4e, 0x06}, /* HSWGT3UT, HSWM_w7 */
326 {0x0A2E, 0x8c4e, 0x04}, /* HSWGT3UT28W, HSWM_w7 */
327 {0x0A1E, 0x8c4e, 0x04}, /* HSWGT2UX, HSWM_w7 */
328 {0x0A0E, 0x8c4e, 0x04}, /* HSWGT1ULX, HSWM_w7 */
330 {0x0D26, 0x8c4e, 0x04}, /* HSWGT3CW, HSWM_w7 */
331 {0x0D22, 0x8c4e, 0x04}, /* HSWGT3CWDT, HSWD_w7 */
333 {0x041A, 0x8c4e, 0x04}, /* HSWSVGT2, HSWD_w7 */
335 {0x040A, 0x8c4e, 0x04}, /* HSWSVGT1, HSWD_w7 */
337 {0x1606, 0x9cc3, 0x03}, /* BDWULTGT1, BDWM_w7 */
338 {0x1616, 0x9cc3, 0x03}, /* BDWULTGT2, BDWM_w7 */
339 {0x1626, 0x9cc3, 0x03}, /* BDWULTGT3, BDWM_w7 */
340 {0x160E, 0x9cc3, 0x03}, /* BDWULXGT1, BDWM_w7 */
341 {0x161E, 0x9cc3, 0x03}, /* BDWULXGT2, BDWM_w7 */
342 {0x1602, 0x9cc3, 0x03}, /* BDWHALOGT1, BDWM_w7 */
343 {0x1612, 0x9cc3, 0x03}, /* BDWHALOGT2, BDWM_w7 */
344 {0x1622, 0x9cc3, 0x03}, /* BDWHALOGT3, BDWM_w7 */
345 {0x162B, 0x9cc3, 0x03}, /* BDWHALO28W, BDWM_w7 */
346 {0x162A, 0x9cc3, 0x03}, /* BDWGT3WRKS, BDWM_w7 */
347 {0x162D, 0x9cc3, 0x03}, /* BDWGT3SRVR, BDWM_w7 */
350 static void isa_bridge_class_init(ObjectClass *klass, void *data)
352 DeviceClass *dc = DEVICE_CLASS(klass);
353 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
355 dc->desc = "ISA bridge faked to support IGD PT";
356 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
357 k->vendor_id = PCI_VENDOR_ID_INTEL;
358 k->class_id = PCI_CLASS_BRIDGE_ISA;
361 static const TypeInfo isa_bridge_info = {
362 .name = "igd-passthrough-isa-bridge",
363 .parent = TYPE_PCI_DEVICE,
364 .instance_size = sizeof(PCIDevice),
365 .class_init = isa_bridge_class_init,
366 .interfaces = (InterfaceInfo[]) {
367 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
372 static void pt_graphics_register_types(void)
374 type_register_static(&isa_bridge_info);
376 type_init(pt_graphics_register_types)
378 void xen_igd_passthrough_isa_bridge_create(XenPCIPassthroughState *s,
379 XenHostPCIDevice *dev)
381 PCIBus *bus = pci_get_bus(&s->dev);
382 struct PCIDevice *bridge_dev;
384 const uint16_t gpu_dev_id = dev->device_id;
385 uint16_t pch_dev_id = 0xffff;
386 uint8_t pch_rev_id = 0;
388 num = ARRAY_SIZE(igd_combo_id_infos);
389 for (i = 0; i < num; i++) {
390 if (gpu_dev_id == igd_combo_id_infos[i].gpu_device_id) {
391 pch_dev_id = igd_combo_id_infos[i].pch_device_id;
392 pch_rev_id = igd_combo_id_infos[i].pch_revision_id;
396 if (pch_dev_id == 0xffff) {
400 /* Currently IGD drivers always need to access PCH by 1f.0. */
401 bridge_dev = pci_create_simple(bus, PCI_DEVFN(0x1f, 0),
402 "igd-passthrough-isa-bridge");
405 * Note that vendor id is always PCI_VENDOR_ID_INTEL.
408 fprintf(stderr, "set igd-passthrough-isa-bridge failed!\n");
411 pci_config_set_device_id(bridge_dev->config, pch_dev_id);
412 pci_config_set_revision(bridge_dev->config, pch_rev_id);