1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2021, HiSilicon Ltd. 4 */ 5 6 #include <linux/device.h> 7 #include <linux/eventfd.h> 8 #include <linux/file.h> 9 #include <linux/hisi_acc_qm.h> 10 #include <linux/interrupt.h> 11 #include <linux/module.h> 12 #include <linux/pci.h> 13 #include <linux/vfio.h> 14 #include <linux/vfio_pci_core.h> 15 #include <linux/anon_inodes.h> 16 17 #include "hisi_acc_vfio_pci.h" 18 19 /* Return 0 on VM acc device ready, -ETIMEDOUT hardware timeout */ 20 static int qm_wait_dev_not_ready(struct hisi_qm *qm) 21 { 22 u32 val; 23 24 return readl_relaxed_poll_timeout(qm->io_base + QM_VF_STATE, 25 val, !(val & 0x1), MB_POLL_PERIOD_US, 26 MB_POLL_TIMEOUT_US); 27 } 28 29 /* 30 * Each state Reg is checked 100 times, 31 * with a delay of 100 microseconds after each check 32 */ 33 static u32 qm_check_reg_state(struct hisi_qm *qm, u32 regs) 34 { 35 int check_times = 0; 36 u32 state; 37 38 state = readl(qm->io_base + regs); 39 while (state && check_times < ERROR_CHECK_TIMEOUT) { 40 udelay(CHECK_DELAY_TIME); 41 state = readl(qm->io_base + regs); 42 check_times++; 43 } 44 45 return state; 46 } 47 48 static int qm_read_regs(struct hisi_qm *qm, u32 reg_addr, 49 u32 *data, u8 nums) 50 { 51 int i; 52 53 if (nums < 1 || nums > QM_REGS_MAX_LEN) 54 return -EINVAL; 55 56 for (i = 0; i < nums; i++) { 57 data[i] = readl(qm->io_base + reg_addr); 58 reg_addr += QM_REG_ADDR_OFFSET; 59 } 60 61 return 0; 62 } 63 64 static int qm_write_regs(struct hisi_qm *qm, u32 reg, 65 u32 *data, u8 nums) 66 { 67 int i; 68 69 if (nums < 1 || nums > QM_REGS_MAX_LEN) 70 return -EINVAL; 71 72 for (i = 0; i < nums; i++) 73 writel(data[i], qm->io_base + reg + i * QM_REG_ADDR_OFFSET); 74 75 return 0; 76 } 77 78 static int qm_get_vft(struct hisi_qm *qm, u32 *base) 79 { 80 u64 sqc_vft; 81 u32 qp_num; 82 int ret; 83 84 ret = hisi_qm_mb(qm, QM_MB_CMD_SQC_VFT_V2, 0, 0, 1); 85 if (ret) 86 return ret; 87 88 sqc_vft = readl(qm->io_base + QM_MB_CMD_DATA_ADDR_L) | 89 ((u64)readl(qm->io_base + QM_MB_CMD_DATA_ADDR_H) << 90 QM_XQC_ADDR_OFFSET); 91 *base = QM_SQC_VFT_BASE_MASK_V2 & (sqc_vft >> QM_SQC_VFT_BASE_SHIFT_V2); 92 qp_num = (QM_SQC_VFT_NUM_MASK_V2 & 93 (sqc_vft >> QM_SQC_VFT_NUM_SHIFT_V2)) + 1; 94 95 return qp_num; 96 } 97 98 static int qm_get_sqc(struct hisi_qm *qm, u64 *addr) 99 { 100 int ret; 101 102 ret = hisi_qm_mb(qm, QM_MB_CMD_SQC_BT, 0, 0, 1); 103 if (ret) 104 return ret; 105 106 *addr = readl(qm->io_base + QM_MB_CMD_DATA_ADDR_L) | 107 ((u64)readl(qm->io_base + QM_MB_CMD_DATA_ADDR_H) << 108 QM_XQC_ADDR_OFFSET); 109 110 return 0; 111 } 112 113 static int qm_get_cqc(struct hisi_qm *qm, u64 *addr) 114 { 115 int ret; 116 117 ret = hisi_qm_mb(qm, QM_MB_CMD_CQC_BT, 0, 0, 1); 118 if (ret) 119 return ret; 120 121 *addr = readl(qm->io_base + QM_MB_CMD_DATA_ADDR_L) | 122 ((u64)readl(qm->io_base + QM_MB_CMD_DATA_ADDR_H) << 123 QM_XQC_ADDR_OFFSET); 124 125 return 0; 126 } 127 128 static int qm_get_regs(struct hisi_qm *qm, struct acc_vf_data *vf_data) 129 { 130 struct device *dev = &qm->pdev->dev; 131 int ret; 132 133 ret = qm_read_regs(qm, QM_VF_AEQ_INT_MASK, &vf_data->aeq_int_mask, 1); 134 if (ret) { 135 dev_err(dev, "failed to read QM_VF_AEQ_INT_MASK\n"); 136 return ret; 137 } 138 139 ret = qm_read_regs(qm, QM_VF_EQ_INT_MASK, &vf_data->eq_int_mask, 1); 140 if (ret) { 141 dev_err(dev, "failed to read QM_VF_EQ_INT_MASK\n"); 142 return ret; 143 } 144 145 ret = qm_read_regs(qm, QM_IFC_INT_SOURCE_V, 146 &vf_data->ifc_int_source, 1); 147 if (ret) { 148 dev_err(dev, "failed to read QM_IFC_INT_SOURCE_V\n"); 149 return ret; 150 } 151 152 ret = qm_read_regs(qm, QM_IFC_INT_MASK, &vf_data->ifc_int_mask, 1); 153 if (ret) { 154 dev_err(dev, "failed to read QM_IFC_INT_MASK\n"); 155 return ret; 156 } 157 158 ret = qm_read_regs(qm, QM_IFC_INT_SET_V, &vf_data->ifc_int_set, 1); 159 if (ret) { 160 dev_err(dev, "failed to read QM_IFC_INT_SET_V\n"); 161 return ret; 162 } 163 164 ret = qm_read_regs(qm, QM_PAGE_SIZE, &vf_data->page_size, 1); 165 if (ret) { 166 dev_err(dev, "failed to read QM_PAGE_SIZE\n"); 167 return ret; 168 } 169 170 /* QM_EQC_DW has 7 regs */ 171 ret = qm_read_regs(qm, QM_EQC_DW0, vf_data->qm_eqc_dw, 7); 172 if (ret) { 173 dev_err(dev, "failed to read QM_EQC_DW\n"); 174 return ret; 175 } 176 177 /* QM_AEQC_DW has 7 regs */ 178 ret = qm_read_regs(qm, QM_AEQC_DW0, vf_data->qm_aeqc_dw, 7); 179 if (ret) { 180 dev_err(dev, "failed to read QM_AEQC_DW\n"); 181 return ret; 182 } 183 184 return 0; 185 } 186 187 static int qm_set_regs(struct hisi_qm *qm, struct acc_vf_data *vf_data) 188 { 189 struct device *dev = &qm->pdev->dev; 190 int ret; 191 192 /* Check VF state */ 193 if (unlikely(hisi_qm_wait_mb_ready(qm))) { 194 dev_err(&qm->pdev->dev, "QM device is not ready to write\n"); 195 return -EBUSY; 196 } 197 198 ret = qm_write_regs(qm, QM_VF_AEQ_INT_MASK, &vf_data->aeq_int_mask, 1); 199 if (ret) { 200 dev_err(dev, "failed to write QM_VF_AEQ_INT_MASK\n"); 201 return ret; 202 } 203 204 ret = qm_write_regs(qm, QM_VF_EQ_INT_MASK, &vf_data->eq_int_mask, 1); 205 if (ret) { 206 dev_err(dev, "failed to write QM_VF_EQ_INT_MASK\n"); 207 return ret; 208 } 209 210 ret = qm_write_regs(qm, QM_IFC_INT_SOURCE_V, 211 &vf_data->ifc_int_source, 1); 212 if (ret) { 213 dev_err(dev, "failed to write QM_IFC_INT_SOURCE_V\n"); 214 return ret; 215 } 216 217 ret = qm_write_regs(qm, QM_IFC_INT_MASK, &vf_data->ifc_int_mask, 1); 218 if (ret) { 219 dev_err(dev, "failed to write QM_IFC_INT_MASK\n"); 220 return ret; 221 } 222 223 ret = qm_write_regs(qm, QM_IFC_INT_SET_V, &vf_data->ifc_int_set, 1); 224 if (ret) { 225 dev_err(dev, "failed to write QM_IFC_INT_SET_V\n"); 226 return ret; 227 } 228 229 ret = qm_write_regs(qm, QM_QUE_ISO_CFG_V, &vf_data->que_iso_cfg, 1); 230 if (ret) { 231 dev_err(dev, "failed to write QM_QUE_ISO_CFG_V\n"); 232 return ret; 233 } 234 235 ret = qm_write_regs(qm, QM_PAGE_SIZE, &vf_data->page_size, 1); 236 if (ret) { 237 dev_err(dev, "failed to write QM_PAGE_SIZE\n"); 238 return ret; 239 } 240 241 /* QM_EQC_DW has 7 regs */ 242 ret = qm_write_regs(qm, QM_EQC_DW0, vf_data->qm_eqc_dw, 7); 243 if (ret) { 244 dev_err(dev, "failed to write QM_EQC_DW\n"); 245 return ret; 246 } 247 248 /* QM_AEQC_DW has 7 regs */ 249 ret = qm_write_regs(qm, QM_AEQC_DW0, vf_data->qm_aeqc_dw, 7); 250 if (ret) { 251 dev_err(dev, "failed to write QM_AEQC_DW\n"); 252 return ret; 253 } 254 255 return 0; 256 } 257 258 static void qm_db(struct hisi_qm *qm, u16 qn, u8 cmd, 259 u16 index, u8 priority) 260 { 261 u64 doorbell; 262 u64 dbase; 263 u16 randata = 0; 264 265 if (cmd == QM_DOORBELL_CMD_SQ || cmd == QM_DOORBELL_CMD_CQ) 266 dbase = QM_DOORBELL_SQ_CQ_BASE_V2; 267 else 268 dbase = QM_DOORBELL_EQ_AEQ_BASE_V2; 269 270 doorbell = qn | ((u64)cmd << QM_DB_CMD_SHIFT_V2) | 271 ((u64)randata << QM_DB_RAND_SHIFT_V2) | 272 ((u64)index << QM_DB_INDEX_SHIFT_V2) | 273 ((u64)priority << QM_DB_PRIORITY_SHIFT_V2); 274 275 writeq(doorbell, qm->io_base + dbase); 276 } 277 278 static int pf_qm_get_qp_num(struct hisi_qm *qm, int vf_id, u32 *rbase) 279 { 280 unsigned int val; 281 u64 sqc_vft; 282 u32 qp_num; 283 int ret; 284 285 ret = readl_relaxed_poll_timeout(qm->io_base + QM_VFT_CFG_RDY, val, 286 val & BIT(0), MB_POLL_PERIOD_US, 287 MB_POLL_TIMEOUT_US); 288 if (ret) 289 return ret; 290 291 writel(0x1, qm->io_base + QM_VFT_CFG_OP_WR); 292 /* 0 mean SQC VFT */ 293 writel(0x0, qm->io_base + QM_VFT_CFG_TYPE); 294 writel(vf_id, qm->io_base + QM_VFT_CFG); 295 296 writel(0x0, qm->io_base + QM_VFT_CFG_RDY); 297 writel(0x1, qm->io_base + QM_VFT_CFG_OP_ENABLE); 298 299 ret = readl_relaxed_poll_timeout(qm->io_base + QM_VFT_CFG_RDY, val, 300 val & BIT(0), MB_POLL_PERIOD_US, 301 MB_POLL_TIMEOUT_US); 302 if (ret) 303 return ret; 304 305 sqc_vft = readl(qm->io_base + QM_VFT_CFG_DATA_L) | 306 ((u64)readl(qm->io_base + QM_VFT_CFG_DATA_H) << 307 QM_XQC_ADDR_OFFSET); 308 *rbase = QM_SQC_VFT_BASE_MASK_V2 & 309 (sqc_vft >> QM_SQC_VFT_BASE_SHIFT_V2); 310 qp_num = (QM_SQC_VFT_NUM_MASK_V2 & 311 (sqc_vft >> QM_SQC_VFT_NUM_SHIFT_V2)) + 1; 312 313 return qp_num; 314 } 315 316 static void qm_dev_cmd_init(struct hisi_qm *qm) 317 { 318 /* Clear VF communication status registers. */ 319 writel(0x1, qm->io_base + QM_IFC_INT_SOURCE_V); 320 321 /* Enable pf and vf communication. */ 322 writel(0x0, qm->io_base + QM_IFC_INT_MASK); 323 } 324 325 static int vf_qm_cache_wb(struct hisi_qm *qm) 326 { 327 unsigned int val; 328 329 writel(0x1, qm->io_base + QM_CACHE_WB_START); 330 if (readl_relaxed_poll_timeout(qm->io_base + QM_CACHE_WB_DONE, 331 val, val & BIT(0), MB_POLL_PERIOD_US, 332 MB_POLL_TIMEOUT_US)) { 333 dev_err(&qm->pdev->dev, "vf QM writeback sqc cache fail\n"); 334 return -EINVAL; 335 } 336 337 return 0; 338 } 339 340 static void vf_qm_fun_reset(struct hisi_qm *qm) 341 { 342 int i; 343 344 for (i = 0; i < qm->qp_num; i++) 345 qm_db(qm, i, QM_DOORBELL_CMD_SQ, 0, 1); 346 } 347 348 static int vf_qm_func_stop(struct hisi_qm *qm) 349 { 350 return hisi_qm_mb(qm, QM_MB_CMD_PAUSE_QM, 0, 0, 0); 351 } 352 353 static int vf_qm_check_match(struct hisi_acc_vf_core_device *hisi_acc_vdev, 354 struct hisi_acc_vf_migration_file *migf) 355 { 356 struct acc_vf_data *vf_data = &migf->vf_data; 357 struct hisi_qm *vf_qm = &hisi_acc_vdev->vf_qm; 358 struct hisi_qm *pf_qm = hisi_acc_vdev->pf_qm; 359 struct device *dev = &vf_qm->pdev->dev; 360 u32 que_iso_state; 361 int ret; 362 363 if (migf->total_length < QM_MATCH_SIZE || hisi_acc_vdev->match_done) 364 return 0; 365 366 if (vf_data->acc_magic != ACC_DEV_MAGIC) { 367 dev_err(dev, "failed to match ACC_DEV_MAGIC\n"); 368 return -EINVAL; 369 } 370 371 if (vf_data->dev_id != hisi_acc_vdev->vf_dev->device) { 372 dev_err(dev, "failed to match VF devices\n"); 373 return -EINVAL; 374 } 375 376 /* VF qp num check */ 377 ret = qm_get_vft(vf_qm, &vf_qm->qp_base); 378 if (ret <= 0) { 379 dev_err(dev, "failed to get vft qp nums\n"); 380 return -EINVAL; 381 } 382 383 if (ret != vf_data->qp_num) { 384 dev_err(dev, "failed to match VF qp num\n"); 385 return -EINVAL; 386 } 387 388 vf_qm->qp_num = ret; 389 390 /* VF isolation state check */ 391 ret = qm_read_regs(pf_qm, QM_QUE_ISO_CFG_V, &que_iso_state, 1); 392 if (ret) { 393 dev_err(dev, "failed to read QM_QUE_ISO_CFG_V\n"); 394 return ret; 395 } 396 397 if (vf_data->que_iso_cfg != que_iso_state) { 398 dev_err(dev, "failed to match isolation state\n"); 399 return -EINVAL; 400 } 401 402 ret = qm_write_regs(vf_qm, QM_VF_STATE, &vf_data->vf_qm_state, 1); 403 if (ret) { 404 dev_err(dev, "failed to write QM_VF_STATE\n"); 405 return ret; 406 } 407 408 hisi_acc_vdev->vf_qm_state = vf_data->vf_qm_state; 409 hisi_acc_vdev->match_done = true; 410 return 0; 411 } 412 413 static int vf_qm_get_match_data(struct hisi_acc_vf_core_device *hisi_acc_vdev, 414 struct acc_vf_data *vf_data) 415 { 416 struct hisi_qm *pf_qm = hisi_acc_vdev->pf_qm; 417 struct device *dev = &pf_qm->pdev->dev; 418 int vf_id = hisi_acc_vdev->vf_id; 419 int ret; 420 421 vf_data->acc_magic = ACC_DEV_MAGIC; 422 /* Save device id */ 423 vf_data->dev_id = hisi_acc_vdev->vf_dev->device; 424 425 /* VF qp num save from PF */ 426 ret = pf_qm_get_qp_num(pf_qm, vf_id, &vf_data->qp_base); 427 if (ret <= 0) { 428 dev_err(dev, "failed to get vft qp nums!\n"); 429 return -EINVAL; 430 } 431 432 vf_data->qp_num = ret; 433 434 /* VF isolation state save from PF */ 435 ret = qm_read_regs(pf_qm, QM_QUE_ISO_CFG_V, &vf_data->que_iso_cfg, 1); 436 if (ret) { 437 dev_err(dev, "failed to read QM_QUE_ISO_CFG_V!\n"); 438 return ret; 439 } 440 441 return 0; 442 } 443 444 static int vf_qm_load_data(struct hisi_acc_vf_core_device *hisi_acc_vdev, 445 struct hisi_acc_vf_migration_file *migf) 446 { 447 struct hisi_qm *qm = &hisi_acc_vdev->vf_qm; 448 struct device *dev = &qm->pdev->dev; 449 struct acc_vf_data *vf_data = &migf->vf_data; 450 int ret; 451 452 /* Return if only match data was transferred */ 453 if (migf->total_length == QM_MATCH_SIZE) 454 return 0; 455 456 if (migf->total_length < sizeof(struct acc_vf_data)) 457 return -EINVAL; 458 459 qm->eqe_dma = vf_data->eqe_dma; 460 qm->aeqe_dma = vf_data->aeqe_dma; 461 qm->sqc_dma = vf_data->sqc_dma; 462 qm->cqc_dma = vf_data->cqc_dma; 463 464 qm->qp_base = vf_data->qp_base; 465 qm->qp_num = vf_data->qp_num; 466 467 ret = qm_set_regs(qm, vf_data); 468 if (ret) { 469 dev_err(dev, "set VF regs failed\n"); 470 return ret; 471 } 472 473 ret = hisi_qm_mb(qm, QM_MB_CMD_SQC_BT, qm->sqc_dma, 0, 0); 474 if (ret) { 475 dev_err(dev, "set sqc failed\n"); 476 return ret; 477 } 478 479 ret = hisi_qm_mb(qm, QM_MB_CMD_CQC_BT, qm->cqc_dma, 0, 0); 480 if (ret) { 481 dev_err(dev, "set cqc failed\n"); 482 return ret; 483 } 484 485 qm_dev_cmd_init(qm); 486 return 0; 487 } 488 489 static int vf_qm_state_save(struct hisi_acc_vf_core_device *hisi_acc_vdev, 490 struct hisi_acc_vf_migration_file *migf) 491 { 492 struct acc_vf_data *vf_data = &migf->vf_data; 493 struct hisi_qm *vf_qm = &hisi_acc_vdev->vf_qm; 494 struct device *dev = &vf_qm->pdev->dev; 495 int ret; 496 497 if (unlikely(qm_wait_dev_not_ready(vf_qm))) { 498 /* Update state and return with match data */ 499 vf_data->vf_qm_state = QM_NOT_READY; 500 hisi_acc_vdev->vf_qm_state = vf_data->vf_qm_state; 501 migf->total_length = QM_MATCH_SIZE; 502 return 0; 503 } 504 505 vf_data->vf_qm_state = QM_READY; 506 hisi_acc_vdev->vf_qm_state = vf_data->vf_qm_state; 507 508 ret = vf_qm_cache_wb(vf_qm); 509 if (ret) { 510 dev_err(dev, "failed to writeback QM Cache!\n"); 511 return ret; 512 } 513 514 ret = qm_get_regs(vf_qm, vf_data); 515 if (ret) 516 return -EINVAL; 517 518 /* Every reg is 32 bit, the dma address is 64 bit. */ 519 vf_data->eqe_dma = vf_data->qm_eqc_dw[1]; 520 vf_data->eqe_dma <<= QM_XQC_ADDR_OFFSET; 521 vf_data->eqe_dma |= vf_data->qm_eqc_dw[0]; 522 vf_data->aeqe_dma = vf_data->qm_aeqc_dw[1]; 523 vf_data->aeqe_dma <<= QM_XQC_ADDR_OFFSET; 524 vf_data->aeqe_dma |= vf_data->qm_aeqc_dw[0]; 525 526 /* Through SQC_BT/CQC_BT to get sqc and cqc address */ 527 ret = qm_get_sqc(vf_qm, &vf_data->sqc_dma); 528 if (ret) { 529 dev_err(dev, "failed to read SQC addr!\n"); 530 return -EINVAL; 531 } 532 533 ret = qm_get_cqc(vf_qm, &vf_data->cqc_dma); 534 if (ret) { 535 dev_err(dev, "failed to read CQC addr!\n"); 536 return -EINVAL; 537 } 538 539 migf->total_length = sizeof(struct acc_vf_data); 540 return 0; 541 } 542 543 static struct hisi_acc_vf_core_device *hisi_acc_drvdata(struct pci_dev *pdev) 544 { 545 struct vfio_pci_core_device *core_device = dev_get_drvdata(&pdev->dev); 546 547 return container_of(core_device, struct hisi_acc_vf_core_device, 548 core_device); 549 } 550 551 /* Check the PF's RAS state and Function INT state */ 552 static int 553 hisi_acc_check_int_state(struct hisi_acc_vf_core_device *hisi_acc_vdev) 554 { 555 struct hisi_qm *vfqm = &hisi_acc_vdev->vf_qm; 556 struct hisi_qm *qm = hisi_acc_vdev->pf_qm; 557 struct pci_dev *vf_pdev = hisi_acc_vdev->vf_dev; 558 struct device *dev = &qm->pdev->dev; 559 u32 state; 560 561 /* Check RAS state */ 562 state = qm_check_reg_state(qm, QM_ABNORMAL_INT_STATUS); 563 if (state) { 564 dev_err(dev, "failed to check QM RAS state!\n"); 565 return -EBUSY; 566 } 567 568 /* Check Function Communication state between PF and VF */ 569 state = qm_check_reg_state(vfqm, QM_IFC_INT_STATUS); 570 if (state) { 571 dev_err(dev, "failed to check QM IFC INT state!\n"); 572 return -EBUSY; 573 } 574 state = qm_check_reg_state(vfqm, QM_IFC_INT_SET_V); 575 if (state) { 576 dev_err(dev, "failed to check QM IFC INT SET state!\n"); 577 return -EBUSY; 578 } 579 580 /* Check submodule task state */ 581 switch (vf_pdev->device) { 582 case PCI_DEVICE_ID_HUAWEI_SEC_VF: 583 state = qm_check_reg_state(qm, SEC_CORE_INT_STATUS); 584 if (state) { 585 dev_err(dev, "failed to check QM SEC Core INT state!\n"); 586 return -EBUSY; 587 } 588 return 0; 589 case PCI_DEVICE_ID_HUAWEI_HPRE_VF: 590 state = qm_check_reg_state(qm, HPRE_HAC_INT_STATUS); 591 if (state) { 592 dev_err(dev, "failed to check QM HPRE HAC INT state!\n"); 593 return -EBUSY; 594 } 595 return 0; 596 case PCI_DEVICE_ID_HUAWEI_ZIP_VF: 597 state = qm_check_reg_state(qm, HZIP_CORE_INT_STATUS); 598 if (state) { 599 dev_err(dev, "failed to check QM ZIP Core INT state!\n"); 600 return -EBUSY; 601 } 602 return 0; 603 default: 604 dev_err(dev, "failed to detect acc module type!\n"); 605 return -EINVAL; 606 } 607 } 608 609 static void hisi_acc_vf_disable_fd(struct hisi_acc_vf_migration_file *migf) 610 { 611 mutex_lock(&migf->lock); 612 migf->disabled = true; 613 migf->total_length = 0; 614 migf->filp->f_pos = 0; 615 mutex_unlock(&migf->lock); 616 } 617 618 static void hisi_acc_vf_disable_fds(struct hisi_acc_vf_core_device *hisi_acc_vdev) 619 { 620 if (hisi_acc_vdev->resuming_migf) { 621 hisi_acc_vf_disable_fd(hisi_acc_vdev->resuming_migf); 622 fput(hisi_acc_vdev->resuming_migf->filp); 623 hisi_acc_vdev->resuming_migf = NULL; 624 } 625 626 if (hisi_acc_vdev->saving_migf) { 627 hisi_acc_vf_disable_fd(hisi_acc_vdev->saving_migf); 628 fput(hisi_acc_vdev->saving_migf->filp); 629 hisi_acc_vdev->saving_migf = NULL; 630 } 631 } 632 633 /* 634 * This function is called in all state_mutex unlock cases to 635 * handle a 'deferred_reset' if exists. 636 */ 637 static void 638 hisi_acc_vf_state_mutex_unlock(struct hisi_acc_vf_core_device *hisi_acc_vdev) 639 { 640 again: 641 spin_lock(&hisi_acc_vdev->reset_lock); 642 if (hisi_acc_vdev->deferred_reset) { 643 hisi_acc_vdev->deferred_reset = false; 644 spin_unlock(&hisi_acc_vdev->reset_lock); 645 hisi_acc_vdev->vf_qm_state = QM_NOT_READY; 646 hisi_acc_vdev->mig_state = VFIO_DEVICE_STATE_RUNNING; 647 hisi_acc_vf_disable_fds(hisi_acc_vdev); 648 goto again; 649 } 650 mutex_unlock(&hisi_acc_vdev->state_mutex); 651 spin_unlock(&hisi_acc_vdev->reset_lock); 652 } 653 654 static void hisi_acc_vf_start_device(struct hisi_acc_vf_core_device *hisi_acc_vdev) 655 { 656 struct hisi_qm *vf_qm = &hisi_acc_vdev->vf_qm; 657 658 if (hisi_acc_vdev->vf_qm_state != QM_READY) 659 return; 660 661 /* Make sure the device is enabled */ 662 qm_dev_cmd_init(vf_qm); 663 664 vf_qm_fun_reset(vf_qm); 665 } 666 667 static int hisi_acc_vf_load_state(struct hisi_acc_vf_core_device *hisi_acc_vdev) 668 { 669 struct device *dev = &hisi_acc_vdev->vf_dev->dev; 670 struct hisi_acc_vf_migration_file *migf = hisi_acc_vdev->resuming_migf; 671 int ret; 672 673 /* Recover data to VF */ 674 ret = vf_qm_load_data(hisi_acc_vdev, migf); 675 if (ret) { 676 dev_err(dev, "failed to recover the VF!\n"); 677 return ret; 678 } 679 680 return 0; 681 } 682 683 static int hisi_acc_vf_release_file(struct inode *inode, struct file *filp) 684 { 685 struct hisi_acc_vf_migration_file *migf = filp->private_data; 686 687 hisi_acc_vf_disable_fd(migf); 688 mutex_destroy(&migf->lock); 689 kfree(migf); 690 return 0; 691 } 692 693 static ssize_t hisi_acc_vf_resume_write(struct file *filp, const char __user *buf, 694 size_t len, loff_t *pos) 695 { 696 struct hisi_acc_vf_migration_file *migf = filp->private_data; 697 u8 *vf_data = (u8 *)&migf->vf_data; 698 loff_t requested_length; 699 ssize_t done = 0; 700 int ret; 701 702 if (pos) 703 return -ESPIPE; 704 pos = &filp->f_pos; 705 706 if (*pos < 0 || 707 check_add_overflow((loff_t)len, *pos, &requested_length)) 708 return -EINVAL; 709 710 if (requested_length > sizeof(struct acc_vf_data)) 711 return -ENOMEM; 712 713 mutex_lock(&migf->lock); 714 if (migf->disabled) { 715 done = -ENODEV; 716 goto out_unlock; 717 } 718 719 ret = copy_from_user(vf_data + *pos, buf, len); 720 if (ret) { 721 done = -EFAULT; 722 goto out_unlock; 723 } 724 *pos += len; 725 done = len; 726 migf->total_length += len; 727 728 ret = vf_qm_check_match(migf->hisi_acc_vdev, migf); 729 if (ret) 730 done = -EFAULT; 731 out_unlock: 732 mutex_unlock(&migf->lock); 733 return done; 734 } 735 736 static const struct file_operations hisi_acc_vf_resume_fops = { 737 .owner = THIS_MODULE, 738 .write = hisi_acc_vf_resume_write, 739 .release = hisi_acc_vf_release_file, 740 .llseek = no_llseek, 741 }; 742 743 static struct hisi_acc_vf_migration_file * 744 hisi_acc_vf_pci_resume(struct hisi_acc_vf_core_device *hisi_acc_vdev) 745 { 746 struct hisi_acc_vf_migration_file *migf; 747 748 migf = kzalloc(sizeof(*migf), GFP_KERNEL_ACCOUNT); 749 if (!migf) 750 return ERR_PTR(-ENOMEM); 751 752 migf->filp = anon_inode_getfile("hisi_acc_vf_mig", &hisi_acc_vf_resume_fops, migf, 753 O_WRONLY); 754 if (IS_ERR(migf->filp)) { 755 int err = PTR_ERR(migf->filp); 756 757 kfree(migf); 758 return ERR_PTR(err); 759 } 760 761 stream_open(migf->filp->f_inode, migf->filp); 762 mutex_init(&migf->lock); 763 migf->hisi_acc_vdev = hisi_acc_vdev; 764 return migf; 765 } 766 767 static long hisi_acc_vf_precopy_ioctl(struct file *filp, 768 unsigned int cmd, unsigned long arg) 769 { 770 struct hisi_acc_vf_migration_file *migf = filp->private_data; 771 struct hisi_acc_vf_core_device *hisi_acc_vdev = migf->hisi_acc_vdev; 772 loff_t *pos = &filp->f_pos; 773 struct vfio_precopy_info info; 774 unsigned long minsz; 775 int ret; 776 777 if (cmd != VFIO_MIG_GET_PRECOPY_INFO) 778 return -ENOTTY; 779 780 minsz = offsetofend(struct vfio_precopy_info, dirty_bytes); 781 782 if (copy_from_user(&info, (void __user *)arg, minsz)) 783 return -EFAULT; 784 if (info.argsz < minsz) 785 return -EINVAL; 786 787 mutex_lock(&hisi_acc_vdev->state_mutex); 788 if (hisi_acc_vdev->mig_state != VFIO_DEVICE_STATE_PRE_COPY) { 789 mutex_unlock(&hisi_acc_vdev->state_mutex); 790 return -EINVAL; 791 } 792 793 mutex_lock(&migf->lock); 794 795 if (migf->disabled) { 796 ret = -ENODEV; 797 goto out; 798 } 799 800 if (*pos > migf->total_length) { 801 ret = -EINVAL; 802 goto out; 803 } 804 805 info.dirty_bytes = 0; 806 info.initial_bytes = migf->total_length - *pos; 807 808 ret = copy_to_user((void __user *)arg, &info, minsz) ? -EFAULT : 0; 809 out: 810 mutex_unlock(&migf->lock); 811 mutex_unlock(&hisi_acc_vdev->state_mutex); 812 return ret; 813 } 814 815 static ssize_t hisi_acc_vf_save_read(struct file *filp, char __user *buf, size_t len, 816 loff_t *pos) 817 { 818 struct hisi_acc_vf_migration_file *migf = filp->private_data; 819 ssize_t done = 0; 820 int ret; 821 822 if (pos) 823 return -ESPIPE; 824 pos = &filp->f_pos; 825 826 mutex_lock(&migf->lock); 827 if (*pos > migf->total_length) { 828 done = -EINVAL; 829 goto out_unlock; 830 } 831 832 if (migf->disabled) { 833 done = -ENODEV; 834 goto out_unlock; 835 } 836 837 len = min_t(size_t, migf->total_length - *pos, len); 838 if (len) { 839 u8 *vf_data = (u8 *)&migf->vf_data; 840 841 ret = copy_to_user(buf, vf_data + *pos, len); 842 if (ret) { 843 done = -EFAULT; 844 goto out_unlock; 845 } 846 *pos += len; 847 done = len; 848 } 849 out_unlock: 850 mutex_unlock(&migf->lock); 851 return done; 852 } 853 854 static const struct file_operations hisi_acc_vf_save_fops = { 855 .owner = THIS_MODULE, 856 .read = hisi_acc_vf_save_read, 857 .unlocked_ioctl = hisi_acc_vf_precopy_ioctl, 858 .compat_ioctl = compat_ptr_ioctl, 859 .release = hisi_acc_vf_release_file, 860 .llseek = no_llseek, 861 }; 862 863 static struct hisi_acc_vf_migration_file * 864 hisi_acc_open_saving_migf(struct hisi_acc_vf_core_device *hisi_acc_vdev) 865 { 866 struct hisi_acc_vf_migration_file *migf; 867 int ret; 868 869 migf = kzalloc(sizeof(*migf), GFP_KERNEL_ACCOUNT); 870 if (!migf) 871 return ERR_PTR(-ENOMEM); 872 873 migf->filp = anon_inode_getfile("hisi_acc_vf_mig", &hisi_acc_vf_save_fops, migf, 874 O_RDONLY); 875 if (IS_ERR(migf->filp)) { 876 int err = PTR_ERR(migf->filp); 877 878 kfree(migf); 879 return ERR_PTR(err); 880 } 881 882 stream_open(migf->filp->f_inode, migf->filp); 883 mutex_init(&migf->lock); 884 migf->hisi_acc_vdev = hisi_acc_vdev; 885 886 ret = vf_qm_get_match_data(hisi_acc_vdev, &migf->vf_data); 887 if (ret) { 888 fput(migf->filp); 889 return ERR_PTR(ret); 890 } 891 892 return migf; 893 } 894 895 static struct hisi_acc_vf_migration_file * 896 hisi_acc_vf_pre_copy(struct hisi_acc_vf_core_device *hisi_acc_vdev) 897 { 898 struct hisi_acc_vf_migration_file *migf; 899 900 migf = hisi_acc_open_saving_migf(hisi_acc_vdev); 901 if (IS_ERR(migf)) 902 return migf; 903 904 migf->total_length = QM_MATCH_SIZE; 905 return migf; 906 } 907 908 static struct hisi_acc_vf_migration_file * 909 hisi_acc_vf_stop_copy(struct hisi_acc_vf_core_device *hisi_acc_vdev, bool open) 910 { 911 int ret; 912 struct hisi_acc_vf_migration_file *migf = NULL; 913 914 if (open) { 915 /* 916 * Userspace didn't use PRECOPY support. Hence saving_migf 917 * is not opened yet. 918 */ 919 migf = hisi_acc_open_saving_migf(hisi_acc_vdev); 920 if (IS_ERR(migf)) 921 return migf; 922 } else { 923 migf = hisi_acc_vdev->saving_migf; 924 } 925 926 ret = vf_qm_state_save(hisi_acc_vdev, migf); 927 if (ret) 928 return ERR_PTR(ret); 929 930 return open ? migf : NULL; 931 } 932 933 static int hisi_acc_vf_stop_device(struct hisi_acc_vf_core_device *hisi_acc_vdev) 934 { 935 struct device *dev = &hisi_acc_vdev->vf_dev->dev; 936 struct hisi_qm *vf_qm = &hisi_acc_vdev->vf_qm; 937 int ret; 938 939 ret = vf_qm_func_stop(vf_qm); 940 if (ret) { 941 dev_err(dev, "failed to stop QM VF function!\n"); 942 return ret; 943 } 944 945 ret = hisi_acc_check_int_state(hisi_acc_vdev); 946 if (ret) { 947 dev_err(dev, "failed to check QM INT state!\n"); 948 return ret; 949 } 950 return 0; 951 } 952 953 static struct file * 954 hisi_acc_vf_set_device_state(struct hisi_acc_vf_core_device *hisi_acc_vdev, 955 u32 new) 956 { 957 u32 cur = hisi_acc_vdev->mig_state; 958 int ret; 959 960 if (cur == VFIO_DEVICE_STATE_RUNNING && new == VFIO_DEVICE_STATE_PRE_COPY) { 961 struct hisi_acc_vf_migration_file *migf; 962 963 migf = hisi_acc_vf_pre_copy(hisi_acc_vdev); 964 if (IS_ERR(migf)) 965 return ERR_CAST(migf); 966 get_file(migf->filp); 967 hisi_acc_vdev->saving_migf = migf; 968 return migf->filp; 969 } 970 971 if (cur == VFIO_DEVICE_STATE_PRE_COPY && new == VFIO_DEVICE_STATE_STOP_COPY) { 972 struct hisi_acc_vf_migration_file *migf; 973 974 ret = hisi_acc_vf_stop_device(hisi_acc_vdev); 975 if (ret) 976 return ERR_PTR(ret); 977 978 migf = hisi_acc_vf_stop_copy(hisi_acc_vdev, false); 979 if (IS_ERR(migf)) 980 return ERR_CAST(migf); 981 982 return NULL; 983 } 984 985 if (cur == VFIO_DEVICE_STATE_RUNNING && new == VFIO_DEVICE_STATE_STOP) { 986 ret = hisi_acc_vf_stop_device(hisi_acc_vdev); 987 if (ret) 988 return ERR_PTR(ret); 989 return NULL; 990 } 991 992 if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_STOP_COPY) { 993 struct hisi_acc_vf_migration_file *migf; 994 995 migf = hisi_acc_vf_stop_copy(hisi_acc_vdev, true); 996 if (IS_ERR(migf)) 997 return ERR_CAST(migf); 998 get_file(migf->filp); 999 hisi_acc_vdev->saving_migf = migf; 1000 return migf->filp; 1001 } 1002 1003 if ((cur == VFIO_DEVICE_STATE_STOP_COPY && new == VFIO_DEVICE_STATE_STOP)) { 1004 hisi_acc_vf_disable_fds(hisi_acc_vdev); 1005 return NULL; 1006 } 1007 1008 if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_RESUMING) { 1009 struct hisi_acc_vf_migration_file *migf; 1010 1011 migf = hisi_acc_vf_pci_resume(hisi_acc_vdev); 1012 if (IS_ERR(migf)) 1013 return ERR_CAST(migf); 1014 get_file(migf->filp); 1015 hisi_acc_vdev->resuming_migf = migf; 1016 return migf->filp; 1017 } 1018 1019 if (cur == VFIO_DEVICE_STATE_RESUMING && new == VFIO_DEVICE_STATE_STOP) { 1020 ret = hisi_acc_vf_load_state(hisi_acc_vdev); 1021 if (ret) 1022 return ERR_PTR(ret); 1023 hisi_acc_vf_disable_fds(hisi_acc_vdev); 1024 return NULL; 1025 } 1026 1027 if (cur == VFIO_DEVICE_STATE_PRE_COPY && new == VFIO_DEVICE_STATE_RUNNING) { 1028 hisi_acc_vf_disable_fds(hisi_acc_vdev); 1029 return NULL; 1030 } 1031 1032 if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_RUNNING) { 1033 hisi_acc_vf_start_device(hisi_acc_vdev); 1034 return NULL; 1035 } 1036 1037 /* 1038 * vfio_mig_get_next_state() does not use arcs other than the above 1039 */ 1040 WARN_ON(true); 1041 return ERR_PTR(-EINVAL); 1042 } 1043 1044 static struct file * 1045 hisi_acc_vfio_pci_set_device_state(struct vfio_device *vdev, 1046 enum vfio_device_mig_state new_state) 1047 { 1048 struct hisi_acc_vf_core_device *hisi_acc_vdev = container_of(vdev, 1049 struct hisi_acc_vf_core_device, core_device.vdev); 1050 enum vfio_device_mig_state next_state; 1051 struct file *res = NULL; 1052 int ret; 1053 1054 mutex_lock(&hisi_acc_vdev->state_mutex); 1055 while (new_state != hisi_acc_vdev->mig_state) { 1056 ret = vfio_mig_get_next_state(vdev, 1057 hisi_acc_vdev->mig_state, 1058 new_state, &next_state); 1059 if (ret) { 1060 res = ERR_PTR(-EINVAL); 1061 break; 1062 } 1063 1064 res = hisi_acc_vf_set_device_state(hisi_acc_vdev, next_state); 1065 if (IS_ERR(res)) 1066 break; 1067 hisi_acc_vdev->mig_state = next_state; 1068 if (WARN_ON(res && new_state != hisi_acc_vdev->mig_state)) { 1069 fput(res); 1070 res = ERR_PTR(-EINVAL); 1071 break; 1072 } 1073 } 1074 hisi_acc_vf_state_mutex_unlock(hisi_acc_vdev); 1075 return res; 1076 } 1077 1078 static int 1079 hisi_acc_vfio_pci_get_data_size(struct vfio_device *vdev, 1080 unsigned long *stop_copy_length) 1081 { 1082 *stop_copy_length = sizeof(struct acc_vf_data); 1083 return 0; 1084 } 1085 1086 static int 1087 hisi_acc_vfio_pci_get_device_state(struct vfio_device *vdev, 1088 enum vfio_device_mig_state *curr_state) 1089 { 1090 struct hisi_acc_vf_core_device *hisi_acc_vdev = container_of(vdev, 1091 struct hisi_acc_vf_core_device, core_device.vdev); 1092 1093 mutex_lock(&hisi_acc_vdev->state_mutex); 1094 *curr_state = hisi_acc_vdev->mig_state; 1095 hisi_acc_vf_state_mutex_unlock(hisi_acc_vdev); 1096 return 0; 1097 } 1098 1099 static void hisi_acc_vf_pci_aer_reset_done(struct pci_dev *pdev) 1100 { 1101 struct hisi_acc_vf_core_device *hisi_acc_vdev = hisi_acc_drvdata(pdev); 1102 1103 if (hisi_acc_vdev->core_device.vdev.migration_flags != 1104 VFIO_MIGRATION_STOP_COPY) 1105 return; 1106 1107 /* 1108 * As the higher VFIO layers are holding locks across reset and using 1109 * those same locks with the mm_lock we need to prevent ABBA deadlock 1110 * with the state_mutex and mm_lock. 1111 * In case the state_mutex was taken already we defer the cleanup work 1112 * to the unlock flow of the other running context. 1113 */ 1114 spin_lock(&hisi_acc_vdev->reset_lock); 1115 hisi_acc_vdev->deferred_reset = true; 1116 if (!mutex_trylock(&hisi_acc_vdev->state_mutex)) { 1117 spin_unlock(&hisi_acc_vdev->reset_lock); 1118 return; 1119 } 1120 spin_unlock(&hisi_acc_vdev->reset_lock); 1121 hisi_acc_vf_state_mutex_unlock(hisi_acc_vdev); 1122 } 1123 1124 static int hisi_acc_vf_qm_init(struct hisi_acc_vf_core_device *hisi_acc_vdev) 1125 { 1126 struct vfio_pci_core_device *vdev = &hisi_acc_vdev->core_device; 1127 struct hisi_qm *vf_qm = &hisi_acc_vdev->vf_qm; 1128 struct pci_dev *vf_dev = vdev->pdev; 1129 1130 /* 1131 * ACC VF dev BAR2 region consists of both functional register space 1132 * and migration control register space. For migration to work, we 1133 * need access to both. Hence, we map the entire BAR2 region here. 1134 * But unnecessarily exposing the migration BAR region to the Guest 1135 * has the potential to prevent/corrupt the Guest migration. Hence, 1136 * we restrict access to the migration control space from 1137 * Guest(Please see mmap/ioctl/read/write override functions). 1138 * 1139 * Please note that it is OK to expose the entire VF BAR if migration 1140 * is not supported or required as this cannot affect the ACC PF 1141 * configurations. 1142 * 1143 * Also the HiSilicon ACC VF devices supported by this driver on 1144 * HiSilicon hardware platforms are integrated end point devices 1145 * and the platform lacks the capability to perform any PCIe P2P 1146 * between these devices. 1147 */ 1148 1149 vf_qm->io_base = 1150 ioremap(pci_resource_start(vf_dev, VFIO_PCI_BAR2_REGION_INDEX), 1151 pci_resource_len(vf_dev, VFIO_PCI_BAR2_REGION_INDEX)); 1152 if (!vf_qm->io_base) 1153 return -EIO; 1154 1155 vf_qm->fun_type = QM_HW_VF; 1156 vf_qm->pdev = vf_dev; 1157 mutex_init(&vf_qm->mailbox_lock); 1158 1159 return 0; 1160 } 1161 1162 static struct hisi_qm *hisi_acc_get_pf_qm(struct pci_dev *pdev) 1163 { 1164 struct hisi_qm *pf_qm; 1165 struct pci_driver *pf_driver; 1166 1167 if (!pdev->is_virtfn) 1168 return NULL; 1169 1170 switch (pdev->device) { 1171 case PCI_DEVICE_ID_HUAWEI_SEC_VF: 1172 pf_driver = hisi_sec_get_pf_driver(); 1173 break; 1174 case PCI_DEVICE_ID_HUAWEI_HPRE_VF: 1175 pf_driver = hisi_hpre_get_pf_driver(); 1176 break; 1177 case PCI_DEVICE_ID_HUAWEI_ZIP_VF: 1178 pf_driver = hisi_zip_get_pf_driver(); 1179 break; 1180 default: 1181 return NULL; 1182 } 1183 1184 if (!pf_driver) 1185 return NULL; 1186 1187 pf_qm = pci_iov_get_pf_drvdata(pdev, pf_driver); 1188 1189 return !IS_ERR(pf_qm) ? pf_qm : NULL; 1190 } 1191 1192 static int hisi_acc_pci_rw_access_check(struct vfio_device *core_vdev, 1193 size_t count, loff_t *ppos, 1194 size_t *new_count) 1195 { 1196 unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos); 1197 struct vfio_pci_core_device *vdev = 1198 container_of(core_vdev, struct vfio_pci_core_device, vdev); 1199 1200 if (index == VFIO_PCI_BAR2_REGION_INDEX) { 1201 loff_t pos = *ppos & VFIO_PCI_OFFSET_MASK; 1202 resource_size_t end = pci_resource_len(vdev->pdev, index) / 2; 1203 1204 /* Check if access is for migration control region */ 1205 if (pos >= end) 1206 return -EINVAL; 1207 1208 *new_count = min(count, (size_t)(end - pos)); 1209 } 1210 1211 return 0; 1212 } 1213 1214 static int hisi_acc_vfio_pci_mmap(struct vfio_device *core_vdev, 1215 struct vm_area_struct *vma) 1216 { 1217 struct vfio_pci_core_device *vdev = 1218 container_of(core_vdev, struct vfio_pci_core_device, vdev); 1219 unsigned int index; 1220 1221 index = vma->vm_pgoff >> (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT); 1222 if (index == VFIO_PCI_BAR2_REGION_INDEX) { 1223 u64 req_len, pgoff, req_start; 1224 resource_size_t end = pci_resource_len(vdev->pdev, index) / 2; 1225 1226 req_len = vma->vm_end - vma->vm_start; 1227 pgoff = vma->vm_pgoff & 1228 ((1U << (VFIO_PCI_OFFSET_SHIFT - PAGE_SHIFT)) - 1); 1229 req_start = pgoff << PAGE_SHIFT; 1230 1231 if (req_start + req_len > end) 1232 return -EINVAL; 1233 } 1234 1235 return vfio_pci_core_mmap(core_vdev, vma); 1236 } 1237 1238 static ssize_t hisi_acc_vfio_pci_write(struct vfio_device *core_vdev, 1239 const char __user *buf, size_t count, 1240 loff_t *ppos) 1241 { 1242 size_t new_count = count; 1243 int ret; 1244 1245 ret = hisi_acc_pci_rw_access_check(core_vdev, count, ppos, &new_count); 1246 if (ret) 1247 return ret; 1248 1249 return vfio_pci_core_write(core_vdev, buf, new_count, ppos); 1250 } 1251 1252 static ssize_t hisi_acc_vfio_pci_read(struct vfio_device *core_vdev, 1253 char __user *buf, size_t count, 1254 loff_t *ppos) 1255 { 1256 size_t new_count = count; 1257 int ret; 1258 1259 ret = hisi_acc_pci_rw_access_check(core_vdev, count, ppos, &new_count); 1260 if (ret) 1261 return ret; 1262 1263 return vfio_pci_core_read(core_vdev, buf, new_count, ppos); 1264 } 1265 1266 static long hisi_acc_vfio_pci_ioctl(struct vfio_device *core_vdev, unsigned int cmd, 1267 unsigned long arg) 1268 { 1269 if (cmd == VFIO_DEVICE_GET_REGION_INFO) { 1270 struct vfio_pci_core_device *vdev = 1271 container_of(core_vdev, struct vfio_pci_core_device, vdev); 1272 struct pci_dev *pdev = vdev->pdev; 1273 struct vfio_region_info info; 1274 unsigned long minsz; 1275 1276 minsz = offsetofend(struct vfio_region_info, offset); 1277 1278 if (copy_from_user(&info, (void __user *)arg, minsz)) 1279 return -EFAULT; 1280 1281 if (info.argsz < minsz) 1282 return -EINVAL; 1283 1284 if (info.index == VFIO_PCI_BAR2_REGION_INDEX) { 1285 info.offset = VFIO_PCI_INDEX_TO_OFFSET(info.index); 1286 1287 /* 1288 * ACC VF dev BAR2 region consists of both functional 1289 * register space and migration control register space. 1290 * Report only the functional region to Guest. 1291 */ 1292 info.size = pci_resource_len(pdev, info.index) / 2; 1293 1294 info.flags = VFIO_REGION_INFO_FLAG_READ | 1295 VFIO_REGION_INFO_FLAG_WRITE | 1296 VFIO_REGION_INFO_FLAG_MMAP; 1297 1298 return copy_to_user((void __user *)arg, &info, minsz) ? 1299 -EFAULT : 0; 1300 } 1301 } 1302 return vfio_pci_core_ioctl(core_vdev, cmd, arg); 1303 } 1304 1305 static int hisi_acc_vfio_pci_open_device(struct vfio_device *core_vdev) 1306 { 1307 struct hisi_acc_vf_core_device *hisi_acc_vdev = container_of(core_vdev, 1308 struct hisi_acc_vf_core_device, core_device.vdev); 1309 struct vfio_pci_core_device *vdev = &hisi_acc_vdev->core_device; 1310 int ret; 1311 1312 ret = vfio_pci_core_enable(vdev); 1313 if (ret) 1314 return ret; 1315 1316 if (core_vdev->mig_ops) { 1317 ret = hisi_acc_vf_qm_init(hisi_acc_vdev); 1318 if (ret) { 1319 vfio_pci_core_disable(vdev); 1320 return ret; 1321 } 1322 hisi_acc_vdev->mig_state = VFIO_DEVICE_STATE_RUNNING; 1323 } 1324 1325 vfio_pci_core_finish_enable(vdev); 1326 return 0; 1327 } 1328 1329 static void hisi_acc_vfio_pci_close_device(struct vfio_device *core_vdev) 1330 { 1331 struct hisi_acc_vf_core_device *hisi_acc_vdev = container_of(core_vdev, 1332 struct hisi_acc_vf_core_device, core_device.vdev); 1333 struct hisi_qm *vf_qm = &hisi_acc_vdev->vf_qm; 1334 1335 iounmap(vf_qm->io_base); 1336 vfio_pci_core_close_device(core_vdev); 1337 } 1338 1339 static const struct vfio_migration_ops hisi_acc_vfio_pci_migrn_state_ops = { 1340 .migration_set_state = hisi_acc_vfio_pci_set_device_state, 1341 .migration_get_state = hisi_acc_vfio_pci_get_device_state, 1342 .migration_get_data_size = hisi_acc_vfio_pci_get_data_size, 1343 }; 1344 1345 static int hisi_acc_vfio_pci_migrn_init_dev(struct vfio_device *core_vdev) 1346 { 1347 struct hisi_acc_vf_core_device *hisi_acc_vdev = container_of(core_vdev, 1348 struct hisi_acc_vf_core_device, core_device.vdev); 1349 struct pci_dev *pdev = to_pci_dev(core_vdev->dev); 1350 struct hisi_qm *pf_qm = hisi_acc_get_pf_qm(pdev); 1351 1352 hisi_acc_vdev->vf_id = pci_iov_vf_id(pdev) + 1; 1353 hisi_acc_vdev->pf_qm = pf_qm; 1354 hisi_acc_vdev->vf_dev = pdev; 1355 mutex_init(&hisi_acc_vdev->state_mutex); 1356 1357 core_vdev->migration_flags = VFIO_MIGRATION_STOP_COPY | VFIO_MIGRATION_PRE_COPY; 1358 core_vdev->mig_ops = &hisi_acc_vfio_pci_migrn_state_ops; 1359 1360 return vfio_pci_core_init_dev(core_vdev); 1361 } 1362 1363 static const struct vfio_device_ops hisi_acc_vfio_pci_migrn_ops = { 1364 .name = "hisi-acc-vfio-pci-migration", 1365 .init = hisi_acc_vfio_pci_migrn_init_dev, 1366 .release = vfio_pci_core_release_dev, 1367 .open_device = hisi_acc_vfio_pci_open_device, 1368 .close_device = hisi_acc_vfio_pci_close_device, 1369 .ioctl = hisi_acc_vfio_pci_ioctl, 1370 .device_feature = vfio_pci_core_ioctl_feature, 1371 .read = hisi_acc_vfio_pci_read, 1372 .write = hisi_acc_vfio_pci_write, 1373 .mmap = hisi_acc_vfio_pci_mmap, 1374 .request = vfio_pci_core_request, 1375 .match = vfio_pci_core_match, 1376 .bind_iommufd = vfio_iommufd_physical_bind, 1377 .unbind_iommufd = vfio_iommufd_physical_unbind, 1378 .attach_ioas = vfio_iommufd_physical_attach_ioas, 1379 .detach_ioas = vfio_iommufd_physical_detach_ioas, 1380 }; 1381 1382 static const struct vfio_device_ops hisi_acc_vfio_pci_ops = { 1383 .name = "hisi-acc-vfio-pci", 1384 .init = vfio_pci_core_init_dev, 1385 .release = vfio_pci_core_release_dev, 1386 .open_device = hisi_acc_vfio_pci_open_device, 1387 .close_device = vfio_pci_core_close_device, 1388 .ioctl = vfio_pci_core_ioctl, 1389 .device_feature = vfio_pci_core_ioctl_feature, 1390 .read = vfio_pci_core_read, 1391 .write = vfio_pci_core_write, 1392 .mmap = vfio_pci_core_mmap, 1393 .request = vfio_pci_core_request, 1394 .match = vfio_pci_core_match, 1395 .bind_iommufd = vfio_iommufd_physical_bind, 1396 .unbind_iommufd = vfio_iommufd_physical_unbind, 1397 .attach_ioas = vfio_iommufd_physical_attach_ioas, 1398 .detach_ioas = vfio_iommufd_physical_detach_ioas, 1399 }; 1400 1401 static int hisi_acc_vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 1402 { 1403 struct hisi_acc_vf_core_device *hisi_acc_vdev; 1404 const struct vfio_device_ops *ops = &hisi_acc_vfio_pci_ops; 1405 struct hisi_qm *pf_qm; 1406 int vf_id; 1407 int ret; 1408 1409 pf_qm = hisi_acc_get_pf_qm(pdev); 1410 if (pf_qm && pf_qm->ver >= QM_HW_V3) { 1411 vf_id = pci_iov_vf_id(pdev); 1412 if (vf_id >= 0) 1413 ops = &hisi_acc_vfio_pci_migrn_ops; 1414 else 1415 pci_warn(pdev, "migration support failed, continue with generic interface\n"); 1416 } 1417 1418 hisi_acc_vdev = vfio_alloc_device(hisi_acc_vf_core_device, 1419 core_device.vdev, &pdev->dev, ops); 1420 if (IS_ERR(hisi_acc_vdev)) 1421 return PTR_ERR(hisi_acc_vdev); 1422 1423 dev_set_drvdata(&pdev->dev, &hisi_acc_vdev->core_device); 1424 ret = vfio_pci_core_register_device(&hisi_acc_vdev->core_device); 1425 if (ret) 1426 goto out_put_vdev; 1427 return 0; 1428 1429 out_put_vdev: 1430 vfio_put_device(&hisi_acc_vdev->core_device.vdev); 1431 return ret; 1432 } 1433 1434 static void hisi_acc_vfio_pci_remove(struct pci_dev *pdev) 1435 { 1436 struct hisi_acc_vf_core_device *hisi_acc_vdev = hisi_acc_drvdata(pdev); 1437 1438 vfio_pci_core_unregister_device(&hisi_acc_vdev->core_device); 1439 vfio_put_device(&hisi_acc_vdev->core_device.vdev); 1440 } 1441 1442 static const struct pci_device_id hisi_acc_vfio_pci_table[] = { 1443 { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_SEC_VF) }, 1444 { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_HPRE_VF) }, 1445 { PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_ZIP_VF) }, 1446 { } 1447 }; 1448 1449 MODULE_DEVICE_TABLE(pci, hisi_acc_vfio_pci_table); 1450 1451 static const struct pci_error_handlers hisi_acc_vf_err_handlers = { 1452 .reset_done = hisi_acc_vf_pci_aer_reset_done, 1453 .error_detected = vfio_pci_core_aer_err_detected, 1454 }; 1455 1456 static struct pci_driver hisi_acc_vfio_pci_driver = { 1457 .name = KBUILD_MODNAME, 1458 .id_table = hisi_acc_vfio_pci_table, 1459 .probe = hisi_acc_vfio_pci_probe, 1460 .remove = hisi_acc_vfio_pci_remove, 1461 .err_handler = &hisi_acc_vf_err_handlers, 1462 .driver_managed_dma = true, 1463 }; 1464 1465 module_pci_driver(hisi_acc_vfio_pci_driver); 1466 1467 MODULE_LICENSE("GPL v2"); 1468 MODULE_AUTHOR("Liu Longfang <liulongfang@huawei.com>"); 1469 MODULE_AUTHOR("Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>"); 1470 MODULE_DESCRIPTION("HiSilicon VFIO PCI - VFIO PCI driver with live migration support for HiSilicon ACC device family"); 1471