1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * ISM driver for s390. 4 * 5 * Copyright IBM Corp. 2018 6 */ 7 #define KMSG_COMPONENT "ism" 8 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 9 10 #include <linux/module.h> 11 #include <linux/types.h> 12 #include <linux/interrupt.h> 13 #include <linux/device.h> 14 #include <linux/err.h> 15 #include <linux/ctype.h> 16 #include <linux/processor.h> 17 18 #include "ism.h" 19 20 MODULE_DESCRIPTION("ISM driver for s390"); 21 MODULE_LICENSE("GPL"); 22 23 #define PCI_DEVICE_ID_IBM_ISM 0x04ED 24 #define DRV_NAME "ism" 25 26 static const struct pci_device_id ism_device_table[] = { 27 { PCI_VDEVICE(IBM, PCI_DEVICE_ID_IBM_ISM), 0 }, 28 { 0, } 29 }; 30 MODULE_DEVICE_TABLE(pci, ism_device_table); 31 32 static debug_info_t *ism_debug_info; 33 static const struct smcd_ops ism_ops; 34 35 #define NO_CLIENT 0xff /* must be >= MAX_CLIENTS */ 36 static struct ism_client *clients[MAX_CLIENTS]; /* use an array rather than */ 37 /* a list for fast mapping */ 38 static u8 max_client; 39 static DEFINE_SPINLOCK(clients_lock); 40 struct ism_dev_list { 41 struct list_head list; 42 struct mutex mutex; /* protects ism device list */ 43 }; 44 45 static struct ism_dev_list ism_dev_list = { 46 .list = LIST_HEAD_INIT(ism_dev_list.list), 47 .mutex = __MUTEX_INITIALIZER(ism_dev_list.mutex), 48 }; 49 50 int ism_register_client(struct ism_client *client) 51 { 52 struct ism_dev *ism; 53 unsigned long flags; 54 int i, rc = -ENOSPC; 55 56 mutex_lock(&ism_dev_list.mutex); 57 spin_lock_irqsave(&clients_lock, flags); 58 for (i = 0; i < MAX_CLIENTS; ++i) { 59 if (!clients[i]) { 60 clients[i] = client; 61 client->id = i; 62 if (i == max_client) 63 max_client++; 64 rc = 0; 65 break; 66 } 67 } 68 spin_unlock_irqrestore(&clients_lock, flags); 69 if (i < MAX_CLIENTS) { 70 /* initialize with all devices that we got so far */ 71 list_for_each_entry(ism, &ism_dev_list.list, list) { 72 ism->priv[i] = NULL; 73 client->add(ism); 74 } 75 } 76 mutex_unlock(&ism_dev_list.mutex); 77 78 return rc; 79 } 80 EXPORT_SYMBOL_GPL(ism_register_client); 81 82 int ism_unregister_client(struct ism_client *client) 83 { 84 struct ism_dev *ism; 85 unsigned long flags; 86 int rc = 0; 87 88 mutex_lock(&ism_dev_list.mutex); 89 spin_lock_irqsave(&clients_lock, flags); 90 clients[client->id] = NULL; 91 if (client->id + 1 == max_client) 92 max_client--; 93 spin_unlock_irqrestore(&clients_lock, flags); 94 list_for_each_entry(ism, &ism_dev_list.list, list) { 95 for (int i = 0; i < ISM_NR_DMBS; ++i) { 96 if (ism->sba_client_arr[i] == client->id) { 97 pr_err("%s: attempt to unregister client '%s'" 98 "with registered dmb(s)\n", __func__, 99 client->name); 100 rc = -EBUSY; 101 goto out; 102 } 103 } 104 } 105 out: 106 mutex_unlock(&ism_dev_list.mutex); 107 108 return rc; 109 } 110 EXPORT_SYMBOL_GPL(ism_unregister_client); 111 112 static int ism_cmd(struct ism_dev *ism, void *cmd) 113 { 114 struct ism_req_hdr *req = cmd; 115 struct ism_resp_hdr *resp = cmd; 116 117 __ism_write_cmd(ism, req + 1, sizeof(*req), req->len - sizeof(*req)); 118 __ism_write_cmd(ism, req, 0, sizeof(*req)); 119 120 WRITE_ONCE(resp->ret, ISM_ERROR); 121 122 __ism_read_cmd(ism, resp, 0, sizeof(*resp)); 123 if (resp->ret) { 124 debug_text_event(ism_debug_info, 0, "cmd failure"); 125 debug_event(ism_debug_info, 0, resp, sizeof(*resp)); 126 goto out; 127 } 128 __ism_read_cmd(ism, resp + 1, sizeof(*resp), resp->len - sizeof(*resp)); 129 out: 130 return resp->ret; 131 } 132 133 static int ism_cmd_simple(struct ism_dev *ism, u32 cmd_code) 134 { 135 union ism_cmd_simple cmd; 136 137 memset(&cmd, 0, sizeof(cmd)); 138 cmd.request.hdr.cmd = cmd_code; 139 cmd.request.hdr.len = sizeof(cmd.request); 140 141 return ism_cmd(ism, &cmd); 142 } 143 144 static int query_info(struct ism_dev *ism) 145 { 146 union ism_qi cmd; 147 148 memset(&cmd, 0, sizeof(cmd)); 149 cmd.request.hdr.cmd = ISM_QUERY_INFO; 150 cmd.request.hdr.len = sizeof(cmd.request); 151 152 if (ism_cmd(ism, &cmd)) 153 goto out; 154 155 debug_text_event(ism_debug_info, 3, "query info"); 156 debug_event(ism_debug_info, 3, &cmd.response, sizeof(cmd.response)); 157 out: 158 return 0; 159 } 160 161 static int register_sba(struct ism_dev *ism) 162 { 163 union ism_reg_sba cmd; 164 dma_addr_t dma_handle; 165 struct ism_sba *sba; 166 167 sba = dma_alloc_coherent(&ism->pdev->dev, PAGE_SIZE, &dma_handle, 168 GFP_KERNEL); 169 if (!sba) 170 return -ENOMEM; 171 172 memset(&cmd, 0, sizeof(cmd)); 173 cmd.request.hdr.cmd = ISM_REG_SBA; 174 cmd.request.hdr.len = sizeof(cmd.request); 175 cmd.request.sba = dma_handle; 176 177 if (ism_cmd(ism, &cmd)) { 178 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, sba, dma_handle); 179 return -EIO; 180 } 181 182 ism->sba = sba; 183 ism->sba_dma_addr = dma_handle; 184 185 return 0; 186 } 187 188 static int register_ieq(struct ism_dev *ism) 189 { 190 union ism_reg_ieq cmd; 191 dma_addr_t dma_handle; 192 struct ism_eq *ieq; 193 194 ieq = dma_alloc_coherent(&ism->pdev->dev, PAGE_SIZE, &dma_handle, 195 GFP_KERNEL); 196 if (!ieq) 197 return -ENOMEM; 198 199 memset(&cmd, 0, sizeof(cmd)); 200 cmd.request.hdr.cmd = ISM_REG_IEQ; 201 cmd.request.hdr.len = sizeof(cmd.request); 202 cmd.request.ieq = dma_handle; 203 cmd.request.len = sizeof(*ieq); 204 205 if (ism_cmd(ism, &cmd)) { 206 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, ieq, dma_handle); 207 return -EIO; 208 } 209 210 ism->ieq = ieq; 211 ism->ieq_idx = -1; 212 ism->ieq_dma_addr = dma_handle; 213 214 return 0; 215 } 216 217 static int unregister_sba(struct ism_dev *ism) 218 { 219 int ret; 220 221 if (!ism->sba) 222 return 0; 223 224 ret = ism_cmd_simple(ism, ISM_UNREG_SBA); 225 if (ret && ret != ISM_ERROR) 226 return -EIO; 227 228 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, 229 ism->sba, ism->sba_dma_addr); 230 231 ism->sba = NULL; 232 ism->sba_dma_addr = 0; 233 234 return 0; 235 } 236 237 static int unregister_ieq(struct ism_dev *ism) 238 { 239 int ret; 240 241 if (!ism->ieq) 242 return 0; 243 244 ret = ism_cmd_simple(ism, ISM_UNREG_IEQ); 245 if (ret && ret != ISM_ERROR) 246 return -EIO; 247 248 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, 249 ism->ieq, ism->ieq_dma_addr); 250 251 ism->ieq = NULL; 252 ism->ieq_dma_addr = 0; 253 254 return 0; 255 } 256 257 static int ism_read_local_gid(struct ism_dev *ism) 258 { 259 union ism_read_gid cmd; 260 int ret; 261 262 memset(&cmd, 0, sizeof(cmd)); 263 cmd.request.hdr.cmd = ISM_READ_GID; 264 cmd.request.hdr.len = sizeof(cmd.request); 265 266 ret = ism_cmd(ism, &cmd); 267 if (ret) 268 goto out; 269 270 ism->local_gid = cmd.response.gid; 271 out: 272 return ret; 273 } 274 275 static int ism_query_rgid(struct ism_dev *ism, u64 rgid, u32 vid_valid, 276 u32 vid) 277 { 278 union ism_query_rgid cmd; 279 280 memset(&cmd, 0, sizeof(cmd)); 281 cmd.request.hdr.cmd = ISM_QUERY_RGID; 282 cmd.request.hdr.len = sizeof(cmd.request); 283 284 cmd.request.rgid = rgid; 285 cmd.request.vlan_valid = vid_valid; 286 cmd.request.vlan_id = vid; 287 288 return ism_cmd(ism, &cmd); 289 } 290 291 static void ism_free_dmb(struct ism_dev *ism, struct ism_dmb *dmb) 292 { 293 clear_bit(dmb->sba_idx, ism->sba_bitmap); 294 dma_free_coherent(&ism->pdev->dev, dmb->dmb_len, 295 dmb->cpu_addr, dmb->dma_addr); 296 } 297 298 static int ism_alloc_dmb(struct ism_dev *ism, struct ism_dmb *dmb) 299 { 300 unsigned long bit; 301 302 if (PAGE_ALIGN(dmb->dmb_len) > dma_get_max_seg_size(&ism->pdev->dev)) 303 return -EINVAL; 304 305 if (!dmb->sba_idx) { 306 bit = find_next_zero_bit(ism->sba_bitmap, ISM_NR_DMBS, 307 ISM_DMB_BIT_OFFSET); 308 if (bit == ISM_NR_DMBS) 309 return -ENOSPC; 310 311 dmb->sba_idx = bit; 312 } 313 if (dmb->sba_idx < ISM_DMB_BIT_OFFSET || 314 test_and_set_bit(dmb->sba_idx, ism->sba_bitmap)) 315 return -EINVAL; 316 317 dmb->cpu_addr = dma_alloc_coherent(&ism->pdev->dev, dmb->dmb_len, 318 &dmb->dma_addr, 319 GFP_KERNEL | __GFP_NOWARN | 320 __GFP_NOMEMALLOC | __GFP_NORETRY); 321 if (!dmb->cpu_addr) 322 clear_bit(dmb->sba_idx, ism->sba_bitmap); 323 324 return dmb->cpu_addr ? 0 : -ENOMEM; 325 } 326 327 int ism_register_dmb(struct ism_dev *ism, struct ism_dmb *dmb, 328 struct ism_client *client) 329 { 330 union ism_reg_dmb cmd; 331 int ret; 332 333 ret = ism_alloc_dmb(ism, dmb); 334 if (ret) 335 goto out; 336 337 memset(&cmd, 0, sizeof(cmd)); 338 cmd.request.hdr.cmd = ISM_REG_DMB; 339 cmd.request.hdr.len = sizeof(cmd.request); 340 341 cmd.request.dmb = dmb->dma_addr; 342 cmd.request.dmb_len = dmb->dmb_len; 343 cmd.request.sba_idx = dmb->sba_idx; 344 cmd.request.vlan_valid = dmb->vlan_valid; 345 cmd.request.vlan_id = dmb->vlan_id; 346 cmd.request.rgid = dmb->rgid; 347 348 ret = ism_cmd(ism, &cmd); 349 if (ret) { 350 ism_free_dmb(ism, dmb); 351 goto out; 352 } 353 dmb->dmb_tok = cmd.response.dmb_tok; 354 ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = client->id; 355 out: 356 return ret; 357 } 358 EXPORT_SYMBOL_GPL(ism_register_dmb); 359 360 int ism_unregister_dmb(struct ism_dev *ism, struct ism_dmb *dmb) 361 { 362 union ism_unreg_dmb cmd; 363 int ret; 364 365 memset(&cmd, 0, sizeof(cmd)); 366 cmd.request.hdr.cmd = ISM_UNREG_DMB; 367 cmd.request.hdr.len = sizeof(cmd.request); 368 369 cmd.request.dmb_tok = dmb->dmb_tok; 370 371 ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = NO_CLIENT; 372 373 ret = ism_cmd(ism, &cmd); 374 if (ret && ret != ISM_ERROR) 375 goto out; 376 377 ism_free_dmb(ism, dmb); 378 out: 379 return ret; 380 } 381 EXPORT_SYMBOL_GPL(ism_unregister_dmb); 382 383 static int ism_add_vlan_id(struct ism_dev *ism, u64 vlan_id) 384 { 385 union ism_set_vlan_id cmd; 386 387 memset(&cmd, 0, sizeof(cmd)); 388 cmd.request.hdr.cmd = ISM_ADD_VLAN_ID; 389 cmd.request.hdr.len = sizeof(cmd.request); 390 391 cmd.request.vlan_id = vlan_id; 392 393 return ism_cmd(ism, &cmd); 394 } 395 396 static int ism_del_vlan_id(struct ism_dev *ism, u64 vlan_id) 397 { 398 union ism_set_vlan_id cmd; 399 400 memset(&cmd, 0, sizeof(cmd)); 401 cmd.request.hdr.cmd = ISM_DEL_VLAN_ID; 402 cmd.request.hdr.len = sizeof(cmd.request); 403 404 cmd.request.vlan_id = vlan_id; 405 406 return ism_cmd(ism, &cmd); 407 } 408 409 static int ism_signal_ieq(struct ism_dev *ism, u64 rgid, u32 trigger_irq, 410 u32 event_code, u64 info) 411 { 412 union ism_sig_ieq cmd; 413 414 memset(&cmd, 0, sizeof(cmd)); 415 cmd.request.hdr.cmd = ISM_SIGNAL_IEQ; 416 cmd.request.hdr.len = sizeof(cmd.request); 417 418 cmd.request.rgid = rgid; 419 cmd.request.trigger_irq = trigger_irq; 420 cmd.request.event_code = event_code; 421 cmd.request.info = info; 422 423 return ism_cmd(ism, &cmd); 424 } 425 426 static unsigned int max_bytes(unsigned int start, unsigned int len, 427 unsigned int boundary) 428 { 429 return min(boundary - (start & (boundary - 1)), len); 430 } 431 432 int ism_move(struct ism_dev *ism, u64 dmb_tok, unsigned int idx, bool sf, 433 unsigned int offset, void *data, unsigned int size) 434 { 435 unsigned int bytes; 436 u64 dmb_req; 437 int ret; 438 439 while (size) { 440 bytes = max_bytes(offset, size, PAGE_SIZE); 441 dmb_req = ISM_CREATE_REQ(dmb_tok, idx, size == bytes ? sf : 0, 442 offset); 443 444 ret = __ism_move(ism, dmb_req, data, bytes); 445 if (ret) 446 return ret; 447 448 size -= bytes; 449 data += bytes; 450 offset += bytes; 451 } 452 453 return 0; 454 } 455 EXPORT_SYMBOL_GPL(ism_move); 456 457 static struct ism_systemeid SYSTEM_EID = { 458 .seid_string = "IBM-SYSZ-ISMSEID00000000", 459 .serial_number = "0000", 460 .type = "0000", 461 }; 462 463 static void ism_create_system_eid(void) 464 { 465 struct cpuid id; 466 u16 ident_tail; 467 char tmp[5]; 468 469 get_cpu_id(&id); 470 ident_tail = (u16)(id.ident & ISM_IDENT_MASK); 471 snprintf(tmp, 5, "%04X", ident_tail); 472 memcpy(&SYSTEM_EID.serial_number, tmp, 4); 473 snprintf(tmp, 5, "%04X", id.machine); 474 memcpy(&SYSTEM_EID.type, tmp, 4); 475 } 476 477 u8 *ism_get_seid(void) 478 { 479 return SYSTEM_EID.seid_string; 480 } 481 EXPORT_SYMBOL_GPL(ism_get_seid); 482 483 static u16 ism_get_chid(struct ism_dev *ism) 484 { 485 if (!ism || !ism->pdev) 486 return 0; 487 488 return to_zpci(ism->pdev)->pchid; 489 } 490 491 static void ism_handle_event(struct ism_dev *ism) 492 { 493 struct ism_event *entry; 494 int i; 495 496 while ((ism->ieq_idx + 1) != READ_ONCE(ism->ieq->header.idx)) { 497 if (++(ism->ieq_idx) == ARRAY_SIZE(ism->ieq->entry)) 498 ism->ieq_idx = 0; 499 500 entry = &ism->ieq->entry[ism->ieq_idx]; 501 debug_event(ism_debug_info, 2, entry, sizeof(*entry)); 502 spin_lock(&clients_lock); 503 for (i = 0; i < max_client; ++i) 504 if (clients[i]) 505 clients[i]->handle_event(ism, entry); 506 spin_unlock(&clients_lock); 507 } 508 } 509 510 static irqreturn_t ism_handle_irq(int irq, void *data) 511 { 512 struct ism_dev *ism = data; 513 struct ism_client *clt; 514 unsigned long bit, end; 515 unsigned long *bv; 516 u16 dmbemask; 517 518 bv = (void *) &ism->sba->dmb_bits[ISM_DMB_WORD_OFFSET]; 519 end = sizeof(ism->sba->dmb_bits) * BITS_PER_BYTE - ISM_DMB_BIT_OFFSET; 520 521 spin_lock(&ism->lock); 522 ism->sba->s = 0; 523 barrier(); 524 for (bit = 0;;) { 525 bit = find_next_bit_inv(bv, end, bit); 526 if (bit >= end) 527 break; 528 529 clear_bit_inv(bit, bv); 530 dmbemask = ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET]; 531 ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET] = 0; 532 barrier(); 533 clt = clients[ism->sba_client_arr[bit]]; 534 clt->handle_irq(ism, bit + ISM_DMB_BIT_OFFSET, dmbemask); 535 } 536 537 if (ism->sba->e) { 538 ism->sba->e = 0; 539 barrier(); 540 ism_handle_event(ism); 541 } 542 spin_unlock(&ism->lock); 543 return IRQ_HANDLED; 544 } 545 546 static u64 ism_get_local_gid(struct ism_dev *ism) 547 { 548 return ism->local_gid; 549 } 550 551 static void ism_dev_add_work_func(struct work_struct *work) 552 { 553 struct ism_client *client = container_of(work, struct ism_client, 554 add_work); 555 556 client->add(client->tgt_ism); 557 atomic_dec(&client->tgt_ism->add_dev_cnt); 558 wake_up(&client->tgt_ism->waitq); 559 } 560 561 static int ism_dev_init(struct ism_dev *ism) 562 { 563 struct pci_dev *pdev = ism->pdev; 564 unsigned long flags; 565 int i, ret; 566 567 ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI); 568 if (ret <= 0) 569 goto out; 570 571 ism->sba_client_arr = kzalloc(ISM_NR_DMBS, GFP_KERNEL); 572 if (!ism->sba_client_arr) 573 goto free_vectors; 574 memset(ism->sba_client_arr, NO_CLIENT, ISM_NR_DMBS); 575 576 ret = request_irq(pci_irq_vector(pdev, 0), ism_handle_irq, 0, 577 pci_name(pdev), ism); 578 if (ret) 579 goto free_client_arr; 580 581 ret = register_sba(ism); 582 if (ret) 583 goto free_irq; 584 585 ret = register_ieq(ism); 586 if (ret) 587 goto unreg_sba; 588 589 ret = ism_read_local_gid(ism); 590 if (ret) 591 goto unreg_ieq; 592 593 if (!ism_add_vlan_id(ism, ISM_RESERVED_VLANID)) 594 /* hardware is V2 capable */ 595 ism_create_system_eid(); 596 597 init_waitqueue_head(&ism->waitq); 598 atomic_set(&ism->free_clients_cnt, 0); 599 atomic_set(&ism->add_dev_cnt, 0); 600 601 wait_event(ism->waitq, !atomic_read(&ism->add_dev_cnt)); 602 spin_lock_irqsave(&clients_lock, flags); 603 for (i = 0; i < max_client; ++i) 604 if (clients[i]) { 605 INIT_WORK(&clients[i]->add_work, 606 ism_dev_add_work_func); 607 clients[i]->tgt_ism = ism; 608 atomic_inc(&ism->add_dev_cnt); 609 schedule_work(&clients[i]->add_work); 610 } 611 spin_unlock_irqrestore(&clients_lock, flags); 612 613 wait_event(ism->waitq, !atomic_read(&ism->add_dev_cnt)); 614 615 mutex_lock(&ism_dev_list.mutex); 616 list_add(&ism->list, &ism_dev_list.list); 617 mutex_unlock(&ism_dev_list.mutex); 618 619 query_info(ism); 620 return 0; 621 622 unreg_ieq: 623 unregister_ieq(ism); 624 unreg_sba: 625 unregister_sba(ism); 626 free_irq: 627 free_irq(pci_irq_vector(pdev, 0), ism); 628 free_client_arr: 629 kfree(ism->sba_client_arr); 630 free_vectors: 631 pci_free_irq_vectors(pdev); 632 out: 633 return ret; 634 } 635 636 static int ism_probe(struct pci_dev *pdev, const struct pci_device_id *id) 637 { 638 struct ism_dev *ism; 639 int ret; 640 641 ism = kzalloc(sizeof(*ism), GFP_KERNEL); 642 if (!ism) 643 return -ENOMEM; 644 645 spin_lock_init(&ism->lock); 646 dev_set_drvdata(&pdev->dev, ism); 647 ism->pdev = pdev; 648 ism->dev.parent = &pdev->dev; 649 device_initialize(&ism->dev); 650 dev_set_name(&ism->dev, dev_name(&pdev->dev)); 651 ret = device_add(&ism->dev); 652 if (ret) 653 goto err_dev; 654 655 ret = pci_enable_device_mem(pdev); 656 if (ret) 657 goto err; 658 659 ret = pci_request_mem_regions(pdev, DRV_NAME); 660 if (ret) 661 goto err_disable; 662 663 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 664 if (ret) 665 goto err_resource; 666 667 dma_set_seg_boundary(&pdev->dev, SZ_1M - 1); 668 dma_set_max_seg_size(&pdev->dev, SZ_1M); 669 pci_set_master(pdev); 670 671 ret = ism_dev_init(ism); 672 if (ret) 673 goto err_resource; 674 675 return 0; 676 677 err_resource: 678 pci_release_mem_regions(pdev); 679 err_disable: 680 pci_disable_device(pdev); 681 err: 682 device_del(&ism->dev); 683 err_dev: 684 dev_set_drvdata(&pdev->dev, NULL); 685 kfree(ism); 686 687 return ret; 688 } 689 690 static void ism_dev_remove_work_func(struct work_struct *work) 691 { 692 struct ism_client *client = container_of(work, struct ism_client, 693 remove_work); 694 695 client->remove(client->tgt_ism); 696 atomic_dec(&client->tgt_ism->free_clients_cnt); 697 wake_up(&client->tgt_ism->waitq); 698 } 699 700 /* Callers must hold ism_dev_list.mutex */ 701 static void ism_dev_exit(struct ism_dev *ism) 702 { 703 struct pci_dev *pdev = ism->pdev; 704 unsigned long flags; 705 int i; 706 707 wait_event(ism->waitq, !atomic_read(&ism->free_clients_cnt)); 708 spin_lock_irqsave(&clients_lock, flags); 709 for (i = 0; i < max_client; ++i) 710 if (clients[i]) { 711 INIT_WORK(&clients[i]->remove_work, 712 ism_dev_remove_work_func); 713 clients[i]->tgt_ism = ism; 714 atomic_inc(&ism->free_clients_cnt); 715 schedule_work(&clients[i]->remove_work); 716 } 717 spin_unlock_irqrestore(&clients_lock, flags); 718 719 wait_event(ism->waitq, !atomic_read(&ism->free_clients_cnt)); 720 721 if (SYSTEM_EID.serial_number[0] != '0' || 722 SYSTEM_EID.type[0] != '0') 723 ism_del_vlan_id(ism, ISM_RESERVED_VLANID); 724 unregister_ieq(ism); 725 unregister_sba(ism); 726 free_irq(pci_irq_vector(pdev, 0), ism); 727 kfree(ism->sba_client_arr); 728 pci_free_irq_vectors(pdev); 729 list_del_init(&ism->list); 730 } 731 732 static void ism_remove(struct pci_dev *pdev) 733 { 734 struct ism_dev *ism = dev_get_drvdata(&pdev->dev); 735 736 mutex_lock(&ism_dev_list.mutex); 737 ism_dev_exit(ism); 738 mutex_unlock(&ism_dev_list.mutex); 739 740 pci_release_mem_regions(pdev); 741 pci_disable_device(pdev); 742 device_del(&ism->dev); 743 dev_set_drvdata(&pdev->dev, NULL); 744 kfree(ism); 745 } 746 747 static struct pci_driver ism_driver = { 748 .name = DRV_NAME, 749 .id_table = ism_device_table, 750 .probe = ism_probe, 751 .remove = ism_remove, 752 }; 753 754 static int __init ism_init(void) 755 { 756 int ret; 757 758 ism_debug_info = debug_register("ism", 2, 1, 16); 759 if (!ism_debug_info) 760 return -ENODEV; 761 762 memset(clients, 0, sizeof(clients)); 763 max_client = 0; 764 debug_register_view(ism_debug_info, &debug_hex_ascii_view); 765 ret = pci_register_driver(&ism_driver); 766 if (ret) 767 debug_unregister(ism_debug_info); 768 769 return ret; 770 } 771 772 static void __exit ism_exit(void) 773 { 774 pci_unregister_driver(&ism_driver); 775 debug_unregister(ism_debug_info); 776 } 777 778 module_init(ism_init); 779 module_exit(ism_exit); 780 781 /*************************** SMC-D Implementation *****************************/ 782 783 #if IS_ENABLED(CONFIG_SMC) 784 static int smcd_query_rgid(struct smcd_dev *smcd, u64 rgid, u32 vid_valid, 785 u32 vid) 786 { 787 return ism_query_rgid(smcd->priv, rgid, vid_valid, vid); 788 } 789 790 static int smcd_register_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb, 791 struct ism_client *client) 792 { 793 return ism_register_dmb(smcd->priv, (struct ism_dmb *)dmb, client); 794 } 795 796 static int smcd_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb) 797 { 798 return ism_unregister_dmb(smcd->priv, (struct ism_dmb *)dmb); 799 } 800 801 static int smcd_add_vlan_id(struct smcd_dev *smcd, u64 vlan_id) 802 { 803 return ism_add_vlan_id(smcd->priv, vlan_id); 804 } 805 806 static int smcd_del_vlan_id(struct smcd_dev *smcd, u64 vlan_id) 807 { 808 return ism_del_vlan_id(smcd->priv, vlan_id); 809 } 810 811 static int smcd_set_vlan_required(struct smcd_dev *smcd) 812 { 813 return ism_cmd_simple(smcd->priv, ISM_SET_VLAN); 814 } 815 816 static int smcd_reset_vlan_required(struct smcd_dev *smcd) 817 { 818 return ism_cmd_simple(smcd->priv, ISM_RESET_VLAN); 819 } 820 821 static int smcd_signal_ieq(struct smcd_dev *smcd, u64 rgid, u32 trigger_irq, 822 u32 event_code, u64 info) 823 { 824 return ism_signal_ieq(smcd->priv, rgid, trigger_irq, event_code, info); 825 } 826 827 static int smcd_move(struct smcd_dev *smcd, u64 dmb_tok, unsigned int idx, 828 bool sf, unsigned int offset, void *data, 829 unsigned int size) 830 { 831 return ism_move(smcd->priv, dmb_tok, idx, sf, offset, data, size); 832 } 833 834 static int smcd_supports_v2(void) 835 { 836 return SYSTEM_EID.serial_number[0] != '0' || 837 SYSTEM_EID.type[0] != '0'; 838 } 839 840 static u64 smcd_get_local_gid(struct smcd_dev *smcd) 841 { 842 return ism_get_local_gid(smcd->priv); 843 } 844 845 static u16 smcd_get_chid(struct smcd_dev *smcd) 846 { 847 return ism_get_chid(smcd->priv); 848 } 849 850 static inline struct device *smcd_get_dev(struct smcd_dev *dev) 851 { 852 struct ism_dev *ism = dev->priv; 853 854 return &ism->dev; 855 } 856 857 static const struct smcd_ops ism_ops = { 858 .query_remote_gid = smcd_query_rgid, 859 .register_dmb = smcd_register_dmb, 860 .unregister_dmb = smcd_unregister_dmb, 861 .add_vlan_id = smcd_add_vlan_id, 862 .del_vlan_id = smcd_del_vlan_id, 863 .set_vlan_required = smcd_set_vlan_required, 864 .reset_vlan_required = smcd_reset_vlan_required, 865 .signal_event = smcd_signal_ieq, 866 .move_data = smcd_move, 867 .supports_v2 = smcd_supports_v2, 868 .get_system_eid = ism_get_seid, 869 .get_local_gid = smcd_get_local_gid, 870 .get_chid = smcd_get_chid, 871 .get_dev = smcd_get_dev, 872 }; 873 874 const struct smcd_ops *ism_get_smcd_ops(void) 875 { 876 return &ism_ops; 877 } 878 EXPORT_SYMBOL_GPL(ism_get_smcd_ops); 879 #endif 880