1 /* 2 * Copyright(c) 2011-2016 Intel Corporation. All rights reserved. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 * SOFTWARE. 22 */ 23 24 #include <linux/acpi.h> 25 #include "i915_drv.h" 26 #include "gvt.h" 27 28 /* 29 * Note: Only for GVT-g virtual VBT generation, other usage must 30 * not do like this. 31 */ 32 #define _INTEL_BIOS_PRIVATE 33 #include "intel_vbt_defs.h" 34 35 #define OPREGION_SIGNATURE "IntelGraphicsMem" 36 #define MBOX_VBT (1<<3) 37 38 /* device handle */ 39 #define DEVICE_TYPE_CRT 0x01 40 #define DEVICE_TYPE_EFP1 0x04 41 #define DEVICE_TYPE_EFP2 0x40 42 #define DEVICE_TYPE_EFP3 0x20 43 #define DEVICE_TYPE_EFP4 0x10 44 45 #define DEV_SIZE 38 46 47 struct opregion_header { 48 u8 signature[16]; 49 u32 size; 50 u32 opregion_ver; 51 u8 bios_ver[32]; 52 u8 vbios_ver[16]; 53 u8 driver_ver[16]; 54 u32 mboxes; 55 u32 driver_model; 56 u32 pcon; 57 u8 dver[32]; 58 u8 rsvd[124]; 59 } __packed; 60 61 struct bdb_data_header { 62 u8 id; 63 u16 size; /* data size */ 64 } __packed; 65 66 struct efp_child_device_config { 67 u16 handle; 68 u16 device_type; 69 u16 device_class; 70 u8 i2c_speed; 71 u8 dp_onboard_redriver; /* 158 */ 72 u8 dp_ondock_redriver; /* 158 */ 73 u8 hdmi_level_shifter_value:4; /* 169 */ 74 u8 hdmi_max_data_rate:4; /* 204 */ 75 u16 dtd_buf_ptr; /* 161 */ 76 u8 edidless_efp:1; /* 161 */ 77 u8 compression_enable:1; /* 198 */ 78 u8 compression_method:1; /* 198 */ 79 u8 ganged_edp:1; /* 202 */ 80 u8 skip0:4; 81 u8 compression_structure_index:4; /* 198 */ 82 u8 skip1:4; 83 u8 slave_port; /* 202 */ 84 u8 skip2; 85 u8 dvo_port; 86 u8 i2c_pin; /* for add-in card */ 87 u8 slave_addr; /* for add-in card */ 88 u8 ddc_pin; 89 u16 edid_ptr; 90 u8 dvo_config; 91 u8 efp_docked_port:1; /* 158 */ 92 u8 lane_reversal:1; /* 184 */ 93 u8 onboard_lspcon:1; /* 192 */ 94 u8 iboost_enable:1; /* 196 */ 95 u8 hpd_invert:1; /* BXT 196 */ 96 u8 slip3:3; 97 u8 hdmi_compat:1; 98 u8 dp_compat:1; 99 u8 tmds_compat:1; 100 u8 skip4:5; 101 u8 aux_channel; 102 u8 dongle_detect; 103 u8 pipe_cap:2; 104 u8 sdvo_stall:1; /* 158 */ 105 u8 hpd_status:2; 106 u8 integrated_encoder:1; 107 u8 skip5:2; 108 u8 dvo_wiring; 109 u8 mipi_bridge_type; /* 171 */ 110 u16 device_class_ext; 111 u8 dvo_function; 112 u8 dp_usb_type_c:1; /* 195 */ 113 u8 skip6:7; 114 u8 dp_usb_type_c_2x_gpio_index; /* 195 */ 115 u16 dp_usb_type_c_2x_gpio_pin; /* 195 */ 116 u8 iboost_dp:4; /* 196 */ 117 u8 iboost_hdmi:4; /* 196 */ 118 } __packed; 119 120 struct vbt { 121 /* header->bdb_offset point to bdb_header offset */ 122 struct vbt_header header; 123 struct bdb_header bdb_header; 124 125 struct bdb_data_header general_features_header; 126 struct bdb_general_features general_features; 127 128 struct bdb_data_header general_definitions_header; 129 struct bdb_general_definitions general_definitions; 130 131 struct efp_child_device_config child0; 132 struct efp_child_device_config child1; 133 struct efp_child_device_config child2; 134 struct efp_child_device_config child3; 135 136 struct bdb_data_header driver_features_header; 137 struct bdb_driver_features driver_features; 138 }; 139 140 static void virt_vbt_generation(struct vbt *v) 141 { 142 int num_child; 143 144 memset(v, 0, sizeof(struct vbt)); 145 146 v->header.signature[0] = '$'; 147 v->header.signature[1] = 'V'; 148 v->header.signature[2] = 'B'; 149 v->header.signature[3] = 'T'; 150 151 /* there's features depending on version! */ 152 v->header.version = 155; 153 v->header.header_size = sizeof(v->header); 154 v->header.vbt_size = sizeof(struct vbt) - sizeof(v->header); 155 v->header.bdb_offset = offsetof(struct vbt, bdb_header); 156 157 strcpy(&v->bdb_header.signature[0], "BIOS_DATA_BLOCK"); 158 v->bdb_header.version = 186; /* child_dev_size = 38 */ 159 v->bdb_header.header_size = sizeof(v->bdb_header); 160 161 v->bdb_header.bdb_size = sizeof(struct vbt) - sizeof(struct vbt_header) 162 - sizeof(struct bdb_header); 163 164 /* general features */ 165 v->general_features_header.id = BDB_GENERAL_FEATURES; 166 v->general_features_header.size = sizeof(struct bdb_general_features); 167 v->general_features.int_crt_support = 0; 168 v->general_features.int_tv_support = 0; 169 170 /* child device */ 171 num_child = 4; /* each port has one child */ 172 v->general_definitions_header.id = BDB_GENERAL_DEFINITIONS; 173 /* size will include child devices */ 174 v->general_definitions_header.size = 175 sizeof(struct bdb_general_definitions) + num_child * DEV_SIZE; 176 v->general_definitions.child_dev_size = DEV_SIZE; 177 178 /* portA */ 179 v->child0.handle = DEVICE_TYPE_EFP1; 180 v->child0.device_type = DEVICE_TYPE_DP; 181 v->child0.dvo_port = DVO_PORT_DPA; 182 v->child0.aux_channel = DP_AUX_A; 183 v->child0.dp_compat = true; 184 v->child0.integrated_encoder = true; 185 186 /* portB */ 187 v->child1.handle = DEVICE_TYPE_EFP2; 188 v->child1.device_type = DEVICE_TYPE_DP; 189 v->child1.dvo_port = DVO_PORT_DPB; 190 v->child1.aux_channel = DP_AUX_B; 191 v->child1.dp_compat = true; 192 v->child1.integrated_encoder = true; 193 194 /* portC */ 195 v->child2.handle = DEVICE_TYPE_EFP3; 196 v->child2.device_type = DEVICE_TYPE_DP; 197 v->child2.dvo_port = DVO_PORT_DPC; 198 v->child2.aux_channel = DP_AUX_C; 199 v->child2.dp_compat = true; 200 v->child2.integrated_encoder = true; 201 202 /* portD */ 203 v->child3.handle = DEVICE_TYPE_EFP4; 204 v->child3.device_type = DEVICE_TYPE_DP; 205 v->child3.dvo_port = DVO_PORT_DPD; 206 v->child3.aux_channel = DP_AUX_D; 207 v->child3.dp_compat = true; 208 v->child3.integrated_encoder = true; 209 210 /* driver features */ 211 v->driver_features_header.id = BDB_DRIVER_FEATURES; 212 v->driver_features_header.size = sizeof(struct bdb_driver_features); 213 v->driver_features.lvds_config = BDB_DRIVER_FEATURE_NO_LVDS; 214 } 215 216 /** 217 * intel_vgpu_init_opregion - initialize the stuff used to emulate opregion 218 * @vgpu: a vGPU 219 * @gpa: guest physical address of opregion 220 * 221 * Returns: 222 * Zero on success, negative error code if failed. 223 */ 224 int intel_vgpu_init_opregion(struct intel_vgpu *vgpu) 225 { 226 u8 *buf; 227 struct opregion_header *header; 228 struct vbt v; 229 const char opregion_signature[16] = OPREGION_SIGNATURE; 230 231 gvt_dbg_core("init vgpu%d opregion\n", vgpu->id); 232 vgpu_opregion(vgpu)->va = (void *)__get_free_pages(GFP_KERNEL | 233 __GFP_ZERO, 234 get_order(INTEL_GVT_OPREGION_SIZE)); 235 if (!vgpu_opregion(vgpu)->va) { 236 gvt_err("fail to get memory for vgpu virt opregion\n"); 237 return -ENOMEM; 238 } 239 240 /* emulated opregion with VBT mailbox only */ 241 buf = (u8 *)vgpu_opregion(vgpu)->va; 242 header = (struct opregion_header *)buf; 243 memcpy(header->signature, opregion_signature, 244 sizeof(opregion_signature)); 245 header->size = 0x8; 246 header->opregion_ver = 0x02000000; 247 header->mboxes = MBOX_VBT; 248 249 /* for unknown reason, the value in LID field is incorrect 250 * which block the windows guest, so workaround it by force 251 * setting it to "OPEN" 252 */ 253 buf[INTEL_GVT_OPREGION_CLID] = 0x3; 254 255 /* emulated vbt from virt vbt generation */ 256 virt_vbt_generation(&v); 257 memcpy(buf + INTEL_GVT_OPREGION_VBT_OFFSET, &v, sizeof(struct vbt)); 258 259 return 0; 260 } 261 262 static int map_vgpu_opregion(struct intel_vgpu *vgpu, bool map) 263 { 264 u64 mfn; 265 int i, ret; 266 267 for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++) { 268 mfn = intel_gvt_hypervisor_virt_to_mfn(vgpu_opregion(vgpu)->va 269 + i * PAGE_SIZE); 270 if (mfn == INTEL_GVT_INVALID_ADDR) { 271 gvt_vgpu_err("fail to get MFN from VA\n"); 272 return -EINVAL; 273 } 274 ret = intel_gvt_hypervisor_map_gfn_to_mfn(vgpu, 275 vgpu_opregion(vgpu)->gfn[i], 276 mfn, 1, map); 277 if (ret) { 278 gvt_vgpu_err("fail to map GFN to MFN, errno: %d\n", 279 ret); 280 return ret; 281 } 282 } 283 284 vgpu_opregion(vgpu)->mapped = map; 285 286 return 0; 287 } 288 289 /** 290 * intel_vgpu_opregion_base_write_handler - Opregion base register write handler 291 * 292 * @vgpu: a vGPU 293 * @gpa: guest physical address of opregion 294 * 295 * Returns: 296 * Zero on success, negative error code if failed. 297 */ 298 int intel_vgpu_opregion_base_write_handler(struct intel_vgpu *vgpu, u32 gpa) 299 { 300 301 int i, ret = 0; 302 unsigned long pfn; 303 304 gvt_dbg_core("emulate opregion from kernel\n"); 305 306 switch (intel_gvt_host.hypervisor_type) { 307 case INTEL_GVT_HYPERVISOR_KVM: 308 pfn = intel_gvt_hypervisor_gfn_to_mfn(vgpu, gpa >> PAGE_SHIFT); 309 vgpu_opregion(vgpu)->va_gopregion = memremap(pfn << PAGE_SHIFT, 310 INTEL_GVT_OPREGION_SIZE, 311 MEMREMAP_WB); 312 if (!vgpu_opregion(vgpu)->va_gopregion) { 313 gvt_vgpu_err("failed to map guest opregion\n"); 314 ret = -EFAULT; 315 } 316 vgpu_opregion(vgpu)->mapped = true; 317 break; 318 case INTEL_GVT_HYPERVISOR_XEN: 319 /** 320 * Wins guest on Xengt will write this register twice: xen 321 * hvmloader and windows graphic driver. 322 */ 323 if (vgpu_opregion(vgpu)->mapped) 324 map_vgpu_opregion(vgpu, false); 325 326 for (i = 0; i < INTEL_GVT_OPREGION_PAGES; i++) 327 vgpu_opregion(vgpu)->gfn[i] = (gpa >> PAGE_SHIFT) + i; 328 329 ret = map_vgpu_opregion(vgpu, true); 330 break; 331 default: 332 ret = -EINVAL; 333 gvt_vgpu_err("not supported hypervisor\n"); 334 } 335 336 return ret; 337 } 338 339 /** 340 * intel_vgpu_clean_opregion - clean the stuff used to emulate opregion 341 * @vgpu: a vGPU 342 * 343 */ 344 void intel_vgpu_clean_opregion(struct intel_vgpu *vgpu) 345 { 346 gvt_dbg_core("vgpu%d: clean vgpu opregion\n", vgpu->id); 347 348 if (!vgpu_opregion(vgpu)->va) 349 return; 350 351 if (intel_gvt_host.hypervisor_type == INTEL_GVT_HYPERVISOR_XEN) { 352 if (vgpu_opregion(vgpu)->mapped) 353 map_vgpu_opregion(vgpu, false); 354 } else if (intel_gvt_host.hypervisor_type == INTEL_GVT_HYPERVISOR_KVM) { 355 if (vgpu_opregion(vgpu)->mapped) { 356 memunmap(vgpu_opregion(vgpu)->va_gopregion); 357 vgpu_opregion(vgpu)->va_gopregion = NULL; 358 } 359 } 360 free_pages((unsigned long)vgpu_opregion(vgpu)->va, 361 get_order(INTEL_GVT_OPREGION_SIZE)); 362 363 vgpu_opregion(vgpu)->va = NULL; 364 365 } 366 367 368 #define GVT_OPREGION_FUNC(scic) \ 369 ({ \ 370 u32 __ret; \ 371 __ret = (scic & OPREGION_SCIC_FUNC_MASK) >> \ 372 OPREGION_SCIC_FUNC_SHIFT; \ 373 __ret; \ 374 }) 375 376 #define GVT_OPREGION_SUBFUNC(scic) \ 377 ({ \ 378 u32 __ret; \ 379 __ret = (scic & OPREGION_SCIC_SUBFUNC_MASK) >> \ 380 OPREGION_SCIC_SUBFUNC_SHIFT; \ 381 __ret; \ 382 }) 383 384 static const char *opregion_func_name(u32 func) 385 { 386 const char *name = NULL; 387 388 switch (func) { 389 case 0 ... 3: 390 case 5: 391 case 7 ... 15: 392 name = "Reserved"; 393 break; 394 395 case 4: 396 name = "Get BIOS Data"; 397 break; 398 399 case 6: 400 name = "System BIOS Callbacks"; 401 break; 402 403 default: 404 name = "Unknown"; 405 break; 406 } 407 return name; 408 } 409 410 static const char *opregion_subfunc_name(u32 subfunc) 411 { 412 const char *name = NULL; 413 414 switch (subfunc) { 415 case 0: 416 name = "Supported Calls"; 417 break; 418 419 case 1: 420 name = "Requested Callbacks"; 421 break; 422 423 case 2 ... 3: 424 case 8 ... 9: 425 name = "Reserved"; 426 break; 427 428 case 5: 429 name = "Boot Display"; 430 break; 431 432 case 6: 433 name = "TV-Standard/Video-Connector"; 434 break; 435 436 case 7: 437 name = "Internal Graphics"; 438 break; 439 440 case 10: 441 name = "Spread Spectrum Clocks"; 442 break; 443 444 case 11: 445 name = "Get AKSV"; 446 break; 447 448 default: 449 name = "Unknown"; 450 break; 451 } 452 return name; 453 }; 454 455 static bool querying_capabilities(u32 scic) 456 { 457 u32 func, subfunc; 458 459 func = GVT_OPREGION_FUNC(scic); 460 subfunc = GVT_OPREGION_SUBFUNC(scic); 461 462 if ((func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSDATA && 463 subfunc == INTEL_GVT_OPREGION_SCIC_SF_SUPPRTEDCALLS) 464 || (func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSDATA && 465 subfunc == INTEL_GVT_OPREGION_SCIC_SF_REQEUSTEDCALLBACKS) 466 || (func == INTEL_GVT_OPREGION_SCIC_F_GETBIOSCALLBACKS && 467 subfunc == INTEL_GVT_OPREGION_SCIC_SF_SUPPRTEDCALLS)) { 468 return true; 469 } 470 return false; 471 } 472 473 /** 474 * intel_vgpu_emulate_opregion_request - emulating OpRegion request 475 * @vgpu: a vGPU 476 * @swsci: SWSCI request 477 * 478 * Returns: 479 * Zero on success, negative error code if failed 480 */ 481 int intel_vgpu_emulate_opregion_request(struct intel_vgpu *vgpu, u32 swsci) 482 { 483 u32 *scic, *parm; 484 u32 func, subfunc; 485 486 switch (intel_gvt_host.hypervisor_type) { 487 case INTEL_GVT_HYPERVISOR_XEN: 488 scic = vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_SCIC; 489 parm = vgpu_opregion(vgpu)->va + INTEL_GVT_OPREGION_PARM; 490 break; 491 case INTEL_GVT_HYPERVISOR_KVM: 492 scic = vgpu_opregion(vgpu)->va_gopregion + 493 INTEL_GVT_OPREGION_SCIC; 494 parm = vgpu_opregion(vgpu)->va_gopregion + 495 INTEL_GVT_OPREGION_PARM; 496 break; 497 default: 498 gvt_vgpu_err("not supported hypervisor\n"); 499 return -EINVAL; 500 } 501 502 if (!(swsci & SWSCI_SCI_SELECT)) { 503 gvt_vgpu_err("requesting SMI service\n"); 504 return 0; 505 } 506 /* ignore non 0->1 trasitions */ 507 if ((vgpu_cfg_space(vgpu)[INTEL_GVT_PCI_SWSCI] 508 & SWSCI_SCI_TRIGGER) || 509 !(swsci & SWSCI_SCI_TRIGGER)) { 510 return 0; 511 } 512 513 func = GVT_OPREGION_FUNC(*scic); 514 subfunc = GVT_OPREGION_SUBFUNC(*scic); 515 if (!querying_capabilities(*scic)) { 516 gvt_vgpu_err("requesting runtime service: func \"%s\"," 517 " subfunc \"%s\"\n", 518 opregion_func_name(func), 519 opregion_subfunc_name(subfunc)); 520 /* 521 * emulate exit status of function call, '0' means 522 * "failure, generic, unsupported or unknown cause" 523 */ 524 *scic &= ~OPREGION_SCIC_EXIT_MASK; 525 return 0; 526 } 527 528 *scic = 0; 529 *parm = 0; 530 return 0; 531 } 532