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/pci.h> 15 #include <linux/err.h> 16 #include <linux/ctype.h> 17 #include <linux/processor.h> 18 19 #include "ism.h" 20 21 MODULE_DESCRIPTION("ISM driver for s390"); 22 MODULE_LICENSE("GPL"); 23 24 #define PCI_DEVICE_ID_IBM_ISM 0x04ED 25 #define DRV_NAME "ism" 26 27 static const struct pci_device_id ism_device_table[] = { 28 { PCI_VDEVICE(IBM, PCI_DEVICE_ID_IBM_ISM), 0 }, 29 { 0, } 30 }; 31 MODULE_DEVICE_TABLE(pci, ism_device_table); 32 33 static debug_info_t *ism_debug_info; 34 static const struct smcd_ops ism_ops; 35 36 #define NO_CLIENT 0xff /* must be >= MAX_CLIENTS */ 37 static struct ism_client *clients[MAX_CLIENTS]; /* use an array rather than */ 38 /* a list for fast mapping */ 39 static u8 max_client; 40 static DEFINE_SPINLOCK(clients_lock); 41 struct ism_dev_list { 42 struct list_head list; 43 struct mutex mutex; /* protects ism device list */ 44 }; 45 46 static struct ism_dev_list ism_dev_list = { 47 .list = LIST_HEAD_INIT(ism_dev_list.list), 48 .mutex = __MUTEX_INITIALIZER(ism_dev_list.mutex), 49 }; 50 51 int ism_register_client(struct ism_client *client) 52 { 53 struct ism_dev *ism; 54 unsigned long flags; 55 int i, rc = -ENOSPC; 56 57 mutex_lock(&ism_dev_list.mutex); 58 spin_lock_irqsave(&clients_lock, flags); 59 for (i = 0; i < MAX_CLIENTS; ++i) { 60 if (!clients[i]) { 61 clients[i] = client; 62 client->id = i; 63 if (i == max_client) 64 max_client++; 65 rc = 0; 66 break; 67 } 68 } 69 spin_unlock_irqrestore(&clients_lock, flags); 70 if (i < MAX_CLIENTS) { 71 /* initialize with all devices that we got so far */ 72 list_for_each_entry(ism, &ism_dev_list.list, list) { 73 ism->priv[i] = NULL; 74 client->add(ism); 75 } 76 } 77 mutex_unlock(&ism_dev_list.mutex); 78 79 return rc; 80 } 81 EXPORT_SYMBOL_GPL(ism_register_client); 82 83 int ism_unregister_client(struct ism_client *client) 84 { 85 struct ism_dev *ism; 86 unsigned long flags; 87 int rc = 0; 88 89 mutex_lock(&ism_dev_list.mutex); 90 spin_lock_irqsave(&clients_lock, flags); 91 clients[client->id] = NULL; 92 if (client->id + 1 == max_client) 93 max_client--; 94 spin_unlock_irqrestore(&clients_lock, flags); 95 list_for_each_entry(ism, &ism_dev_list.list, list) { 96 for (int i = 0; i < ISM_NR_DMBS; ++i) { 97 if (ism->sba_client_arr[i] == client->id) { 98 pr_err("%s: attempt to unregister client '%s'" 99 "with registered dmb(s)\n", __func__, 100 client->name); 101 rc = -EBUSY; 102 goto out; 103 } 104 } 105 } 106 out: 107 mutex_unlock(&ism_dev_list.mutex); 108 109 return rc; 110 } 111 EXPORT_SYMBOL_GPL(ism_unregister_client); 112 113 static int ism_cmd(struct ism_dev *ism, void *cmd) 114 { 115 struct ism_req_hdr *req = cmd; 116 struct ism_resp_hdr *resp = cmd; 117 118 __ism_write_cmd(ism, req + 1, sizeof(*req), req->len - sizeof(*req)); 119 __ism_write_cmd(ism, req, 0, sizeof(*req)); 120 121 WRITE_ONCE(resp->ret, ISM_ERROR); 122 123 __ism_read_cmd(ism, resp, 0, sizeof(*resp)); 124 if (resp->ret) { 125 debug_text_event(ism_debug_info, 0, "cmd failure"); 126 debug_event(ism_debug_info, 0, resp, sizeof(*resp)); 127 goto out; 128 } 129 __ism_read_cmd(ism, resp + 1, sizeof(*resp), resp->len - sizeof(*resp)); 130 out: 131 return resp->ret; 132 } 133 134 static int ism_cmd_simple(struct ism_dev *ism, u32 cmd_code) 135 { 136 union ism_cmd_simple cmd; 137 138 memset(&cmd, 0, sizeof(cmd)); 139 cmd.request.hdr.cmd = cmd_code; 140 cmd.request.hdr.len = sizeof(cmd.request); 141 142 return ism_cmd(ism, &cmd); 143 } 144 145 static int query_info(struct ism_dev *ism) 146 { 147 union ism_qi cmd; 148 149 memset(&cmd, 0, sizeof(cmd)); 150 cmd.request.hdr.cmd = ISM_QUERY_INFO; 151 cmd.request.hdr.len = sizeof(cmd.request); 152 153 if (ism_cmd(ism, &cmd)) 154 goto out; 155 156 debug_text_event(ism_debug_info, 3, "query info"); 157 debug_event(ism_debug_info, 3, &cmd.response, sizeof(cmd.response)); 158 out: 159 return 0; 160 } 161 162 static int register_sba(struct ism_dev *ism) 163 { 164 union ism_reg_sba cmd; 165 dma_addr_t dma_handle; 166 struct ism_sba *sba; 167 168 sba = dma_alloc_coherent(&ism->pdev->dev, PAGE_SIZE, &dma_handle, 169 GFP_KERNEL); 170 if (!sba) 171 return -ENOMEM; 172 173 memset(&cmd, 0, sizeof(cmd)); 174 cmd.request.hdr.cmd = ISM_REG_SBA; 175 cmd.request.hdr.len = sizeof(cmd.request); 176 cmd.request.sba = dma_handle; 177 178 if (ism_cmd(ism, &cmd)) { 179 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, sba, dma_handle); 180 return -EIO; 181 } 182 183 ism->sba = sba; 184 ism->sba_dma_addr = dma_handle; 185 186 return 0; 187 } 188 189 static int register_ieq(struct ism_dev *ism) 190 { 191 union ism_reg_ieq cmd; 192 dma_addr_t dma_handle; 193 struct ism_eq *ieq; 194 195 ieq = dma_alloc_coherent(&ism->pdev->dev, PAGE_SIZE, &dma_handle, 196 GFP_KERNEL); 197 if (!ieq) 198 return -ENOMEM; 199 200 memset(&cmd, 0, sizeof(cmd)); 201 cmd.request.hdr.cmd = ISM_REG_IEQ; 202 cmd.request.hdr.len = sizeof(cmd.request); 203 cmd.request.ieq = dma_handle; 204 cmd.request.len = sizeof(*ieq); 205 206 if (ism_cmd(ism, &cmd)) { 207 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, ieq, dma_handle); 208 return -EIO; 209 } 210 211 ism->ieq = ieq; 212 ism->ieq_idx = -1; 213 ism->ieq_dma_addr = dma_handle; 214 215 return 0; 216 } 217 218 static int unregister_sba(struct ism_dev *ism) 219 { 220 int ret; 221 222 if (!ism->sba) 223 return 0; 224 225 ret = ism_cmd_simple(ism, ISM_UNREG_SBA); 226 if (ret && ret != ISM_ERROR) 227 return -EIO; 228 229 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, 230 ism->sba, ism->sba_dma_addr); 231 232 ism->sba = NULL; 233 ism->sba_dma_addr = 0; 234 235 return 0; 236 } 237 238 static int unregister_ieq(struct ism_dev *ism) 239 { 240 int ret; 241 242 if (!ism->ieq) 243 return 0; 244 245 ret = ism_cmd_simple(ism, ISM_UNREG_IEQ); 246 if (ret && ret != ISM_ERROR) 247 return -EIO; 248 249 dma_free_coherent(&ism->pdev->dev, PAGE_SIZE, 250 ism->ieq, ism->ieq_dma_addr); 251 252 ism->ieq = NULL; 253 ism->ieq_dma_addr = 0; 254 255 return 0; 256 } 257 258 static int ism_read_local_gid(struct ism_dev *ism) 259 { 260 union ism_read_gid cmd; 261 int ret; 262 263 memset(&cmd, 0, sizeof(cmd)); 264 cmd.request.hdr.cmd = ISM_READ_GID; 265 cmd.request.hdr.len = sizeof(cmd.request); 266 267 ret = ism_cmd(ism, &cmd); 268 if (ret) 269 goto out; 270 271 ism->local_gid = cmd.response.gid; 272 out: 273 return ret; 274 } 275 276 static int ism_query_rgid(struct ism_dev *ism, u64 rgid, u32 vid_valid, 277 u32 vid) 278 { 279 union ism_query_rgid cmd; 280 281 memset(&cmd, 0, sizeof(cmd)); 282 cmd.request.hdr.cmd = ISM_QUERY_RGID; 283 cmd.request.hdr.len = sizeof(cmd.request); 284 285 cmd.request.rgid = rgid; 286 cmd.request.vlan_valid = vid_valid; 287 cmd.request.vlan_id = vid; 288 289 return ism_cmd(ism, &cmd); 290 } 291 292 static void ism_free_dmb(struct ism_dev *ism, struct ism_dmb *dmb) 293 { 294 clear_bit(dmb->sba_idx, ism->sba_bitmap); 295 dma_free_coherent(&ism->pdev->dev, dmb->dmb_len, 296 dmb->cpu_addr, dmb->dma_addr); 297 } 298 299 static int ism_alloc_dmb(struct ism_dev *ism, struct ism_dmb *dmb) 300 { 301 unsigned long bit; 302 303 if (PAGE_ALIGN(dmb->dmb_len) > dma_get_max_seg_size(&ism->pdev->dev)) 304 return -EINVAL; 305 306 if (!dmb->sba_idx) { 307 bit = find_next_zero_bit(ism->sba_bitmap, ISM_NR_DMBS, 308 ISM_DMB_BIT_OFFSET); 309 if (bit == ISM_NR_DMBS) 310 return -ENOSPC; 311 312 dmb->sba_idx = bit; 313 } 314 if (dmb->sba_idx < ISM_DMB_BIT_OFFSET || 315 test_and_set_bit(dmb->sba_idx, ism->sba_bitmap)) 316 return -EINVAL; 317 318 dmb->cpu_addr = dma_alloc_coherent(&ism->pdev->dev, dmb->dmb_len, 319 &dmb->dma_addr, 320 GFP_KERNEL | __GFP_NOWARN | 321 __GFP_NOMEMALLOC | __GFP_NORETRY); 322 if (!dmb->cpu_addr) 323 clear_bit(dmb->sba_idx, ism->sba_bitmap); 324 325 return dmb->cpu_addr ? 0 : -ENOMEM; 326 } 327 328 int ism_register_dmb(struct ism_dev *ism, struct ism_dmb *dmb, 329 struct ism_client *client) 330 { 331 union ism_reg_dmb cmd; 332 int ret; 333 334 ret = ism_alloc_dmb(ism, dmb); 335 if (ret) 336 goto out; 337 338 memset(&cmd, 0, sizeof(cmd)); 339 cmd.request.hdr.cmd = ISM_REG_DMB; 340 cmd.request.hdr.len = sizeof(cmd.request); 341 342 cmd.request.dmb = dmb->dma_addr; 343 cmd.request.dmb_len = dmb->dmb_len; 344 cmd.request.sba_idx = dmb->sba_idx; 345 cmd.request.vlan_valid = dmb->vlan_valid; 346 cmd.request.vlan_id = dmb->vlan_id; 347 cmd.request.rgid = dmb->rgid; 348 349 ret = ism_cmd(ism, &cmd); 350 if (ret) { 351 ism_free_dmb(ism, dmb); 352 goto out; 353 } 354 dmb->dmb_tok = cmd.response.dmb_tok; 355 ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = client->id; 356 out: 357 return ret; 358 } 359 EXPORT_SYMBOL_GPL(ism_register_dmb); 360 361 int ism_unregister_dmb(struct ism_dev *ism, struct ism_dmb *dmb) 362 { 363 union ism_unreg_dmb cmd; 364 int ret; 365 366 memset(&cmd, 0, sizeof(cmd)); 367 cmd.request.hdr.cmd = ISM_UNREG_DMB; 368 cmd.request.hdr.len = sizeof(cmd.request); 369 370 cmd.request.dmb_tok = dmb->dmb_tok; 371 372 ism->sba_client_arr[dmb->sba_idx - ISM_DMB_BIT_OFFSET] = NO_CLIENT; 373 374 ret = ism_cmd(ism, &cmd); 375 if (ret && ret != ISM_ERROR) 376 goto out; 377 378 ism_free_dmb(ism, dmb); 379 out: 380 return ret; 381 } 382 EXPORT_SYMBOL_GPL(ism_unregister_dmb); 383 384 static int ism_add_vlan_id(struct ism_dev *ism, u64 vlan_id) 385 { 386 union ism_set_vlan_id cmd; 387 388 memset(&cmd, 0, sizeof(cmd)); 389 cmd.request.hdr.cmd = ISM_ADD_VLAN_ID; 390 cmd.request.hdr.len = sizeof(cmd.request); 391 392 cmd.request.vlan_id = vlan_id; 393 394 return ism_cmd(ism, &cmd); 395 } 396 397 static int ism_del_vlan_id(struct ism_dev *ism, u64 vlan_id) 398 { 399 union ism_set_vlan_id cmd; 400 401 memset(&cmd, 0, sizeof(cmd)); 402 cmd.request.hdr.cmd = ISM_DEL_VLAN_ID; 403 cmd.request.hdr.len = sizeof(cmd.request); 404 405 cmd.request.vlan_id = vlan_id; 406 407 return ism_cmd(ism, &cmd); 408 } 409 410 static int ism_signal_ieq(struct ism_dev *ism, u64 rgid, u32 trigger_irq, 411 u32 event_code, u64 info) 412 { 413 union ism_sig_ieq cmd; 414 415 memset(&cmd, 0, sizeof(cmd)); 416 cmd.request.hdr.cmd = ISM_SIGNAL_IEQ; 417 cmd.request.hdr.len = sizeof(cmd.request); 418 419 cmd.request.rgid = rgid; 420 cmd.request.trigger_irq = trigger_irq; 421 cmd.request.event_code = event_code; 422 cmd.request.info = info; 423 424 return ism_cmd(ism, &cmd); 425 } 426 427 static unsigned int max_bytes(unsigned int start, unsigned int len, 428 unsigned int boundary) 429 { 430 return min(boundary - (start & (boundary - 1)), len); 431 } 432 433 int ism_move(struct ism_dev *ism, u64 dmb_tok, unsigned int idx, bool sf, 434 unsigned int offset, void *data, unsigned int size) 435 { 436 unsigned int bytes; 437 u64 dmb_req; 438 int ret; 439 440 while (size) { 441 bytes = max_bytes(offset, size, PAGE_SIZE); 442 dmb_req = ISM_CREATE_REQ(dmb_tok, idx, size == bytes ? sf : 0, 443 offset); 444 445 ret = __ism_move(ism, dmb_req, data, bytes); 446 if (ret) 447 return ret; 448 449 size -= bytes; 450 data += bytes; 451 offset += bytes; 452 } 453 454 return 0; 455 } 456 EXPORT_SYMBOL_GPL(ism_move); 457 458 static struct ism_systemeid SYSTEM_EID = { 459 .seid_string = "IBM-SYSZ-ISMSEID00000000", 460 .serial_number = "0000", 461 .type = "0000", 462 }; 463 464 static void ism_create_system_eid(void) 465 { 466 struct cpuid id; 467 u16 ident_tail; 468 char tmp[5]; 469 470 get_cpu_id(&id); 471 ident_tail = (u16)(id.ident & ISM_IDENT_MASK); 472 snprintf(tmp, 5, "%04X", ident_tail); 473 memcpy(&SYSTEM_EID.serial_number, tmp, 4); 474 snprintf(tmp, 5, "%04X", id.machine); 475 memcpy(&SYSTEM_EID.type, tmp, 4); 476 } 477 478 u8 *ism_get_seid(void) 479 { 480 return SYSTEM_EID.seid_string; 481 } 482 EXPORT_SYMBOL_GPL(ism_get_seid); 483 484 static u16 ism_get_chid(struct ism_dev *ism) 485 { 486 if (!ism || !ism->pdev) 487 return 0; 488 489 return to_zpci(ism->pdev)->pchid; 490 } 491 492 static void ism_handle_event(struct ism_dev *ism) 493 { 494 struct ism_event *entry; 495 int i; 496 497 while ((ism->ieq_idx + 1) != READ_ONCE(ism->ieq->header.idx)) { 498 if (++(ism->ieq_idx) == ARRAY_SIZE(ism->ieq->entry)) 499 ism->ieq_idx = 0; 500 501 entry = &ism->ieq->entry[ism->ieq_idx]; 502 debug_event(ism_debug_info, 2, entry, sizeof(*entry)); 503 spin_lock(&clients_lock); 504 for (i = 0; i < max_client; ++i) 505 if (clients[i]) 506 clients[i]->handle_event(ism, entry); 507 spin_unlock(&clients_lock); 508 } 509 } 510 511 static irqreturn_t ism_handle_irq(int irq, void *data) 512 { 513 struct ism_dev *ism = data; 514 struct ism_client *clt; 515 unsigned long bit, end; 516 unsigned long *bv; 517 u16 dmbemask; 518 519 bv = (void *) &ism->sba->dmb_bits[ISM_DMB_WORD_OFFSET]; 520 end = sizeof(ism->sba->dmb_bits) * BITS_PER_BYTE - ISM_DMB_BIT_OFFSET; 521 522 spin_lock(&ism->lock); 523 ism->sba->s = 0; 524 barrier(); 525 for (bit = 0;;) { 526 bit = find_next_bit_inv(bv, end, bit); 527 if (bit >= end) 528 break; 529 530 clear_bit_inv(bit, bv); 531 dmbemask = ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET]; 532 ism->sba->dmbe_mask[bit + ISM_DMB_BIT_OFFSET] = 0; 533 barrier(); 534 clt = clients[ism->sba_client_arr[bit]]; 535 clt->handle_irq(ism, bit + ISM_DMB_BIT_OFFSET, dmbemask); 536 } 537 538 if (ism->sba->e) { 539 ism->sba->e = 0; 540 barrier(); 541 ism_handle_event(ism); 542 } 543 spin_unlock(&ism->lock); 544 return IRQ_HANDLED; 545 } 546 547 static u64 ism_get_local_gid(struct ism_dev *ism) 548 { 549 return ism->local_gid; 550 } 551 552 static void ism_dev_add_work_func(struct work_struct *work) 553 { 554 struct ism_client *client = container_of(work, struct ism_client, 555 add_work); 556 557 client->add(client->tgt_ism); 558 atomic_dec(&client->tgt_ism->add_dev_cnt); 559 wake_up(&client->tgt_ism->waitq); 560 } 561 562 static int ism_dev_init(struct ism_dev *ism) 563 { 564 struct pci_dev *pdev = ism->pdev; 565 unsigned long flags; 566 int i, ret; 567 568 ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI); 569 if (ret <= 0) 570 goto out; 571 572 ism->sba_client_arr = kzalloc(ISM_NR_DMBS, GFP_KERNEL); 573 if (!ism->sba_client_arr) 574 goto free_vectors; 575 memset(ism->sba_client_arr, NO_CLIENT, ISM_NR_DMBS); 576 577 ret = request_irq(pci_irq_vector(pdev, 0), ism_handle_irq, 0, 578 pci_name(pdev), ism); 579 if (ret) 580 goto free_client_arr; 581 582 ret = register_sba(ism); 583 if (ret) 584 goto free_irq; 585 586 ret = register_ieq(ism); 587 if (ret) 588 goto unreg_sba; 589 590 ret = ism_read_local_gid(ism); 591 if (ret) 592 goto unreg_ieq; 593 594 if (!ism_add_vlan_id(ism, ISM_RESERVED_VLANID)) 595 /* hardware is V2 capable */ 596 ism_create_system_eid(); 597 598 init_waitqueue_head(&ism->waitq); 599 atomic_set(&ism->free_clients_cnt, 0); 600 atomic_set(&ism->add_dev_cnt, 0); 601 602 wait_event(ism->waitq, !atomic_read(&ism->add_dev_cnt)); 603 spin_lock_irqsave(&clients_lock, flags); 604 for (i = 0; i < max_client; ++i) 605 if (clients[i]) { 606 INIT_WORK(&clients[i]->add_work, 607 ism_dev_add_work_func); 608 clients[i]->tgt_ism = ism; 609 atomic_inc(&ism->add_dev_cnt); 610 schedule_work(&clients[i]->add_work); 611 } 612 spin_unlock_irqrestore(&clients_lock, flags); 613 614 wait_event(ism->waitq, !atomic_read(&ism->add_dev_cnt)); 615 616 mutex_lock(&ism_dev_list.mutex); 617 list_add(&ism->list, &ism_dev_list.list); 618 mutex_unlock(&ism_dev_list.mutex); 619 620 query_info(ism); 621 return 0; 622 623 unreg_ieq: 624 unregister_ieq(ism); 625 unreg_sba: 626 unregister_sba(ism); 627 free_irq: 628 free_irq(pci_irq_vector(pdev, 0), ism); 629 free_client_arr: 630 kfree(ism->sba_client_arr); 631 free_vectors: 632 pci_free_irq_vectors(pdev); 633 out: 634 return ret; 635 } 636 637 static int ism_probe(struct pci_dev *pdev, const struct pci_device_id *id) 638 { 639 struct ism_dev *ism; 640 int ret; 641 642 ism = kzalloc(sizeof(*ism), GFP_KERNEL); 643 if (!ism) 644 return -ENOMEM; 645 646 spin_lock_init(&ism->lock); 647 dev_set_drvdata(&pdev->dev, ism); 648 ism->pdev = pdev; 649 ism->dev.parent = &pdev->dev; 650 device_initialize(&ism->dev); 651 dev_set_name(&ism->dev, dev_name(&pdev->dev)); 652 ret = device_add(&ism->dev); 653 if (ret) 654 goto err_dev; 655 656 ret = pci_enable_device_mem(pdev); 657 if (ret) 658 goto err; 659 660 ret = pci_request_mem_regions(pdev, DRV_NAME); 661 if (ret) 662 goto err_disable; 663 664 ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); 665 if (ret) 666 goto err_resource; 667 668 dma_set_seg_boundary(&pdev->dev, SZ_1M - 1); 669 dma_set_max_seg_size(&pdev->dev, SZ_1M); 670 pci_set_master(pdev); 671 672 ret = ism_dev_init(ism); 673 if (ret) 674 goto err_resource; 675 676 return 0; 677 678 err_resource: 679 pci_clear_master(pdev); 680 pci_release_mem_regions(pdev); 681 err_disable: 682 pci_disable_device(pdev); 683 err: 684 device_del(&ism->dev); 685 err_dev: 686 dev_set_drvdata(&pdev->dev, NULL); 687 kfree(ism); 688 689 return ret; 690 } 691 692 static void ism_dev_remove_work_func(struct work_struct *work) 693 { 694 struct ism_client *client = container_of(work, struct ism_client, 695 remove_work); 696 697 client->remove(client->tgt_ism); 698 atomic_dec(&client->tgt_ism->free_clients_cnt); 699 wake_up(&client->tgt_ism->waitq); 700 } 701 702 /* Callers must hold ism_dev_list.mutex */ 703 static void ism_dev_exit(struct ism_dev *ism) 704 { 705 struct pci_dev *pdev = ism->pdev; 706 unsigned long flags; 707 int i; 708 709 wait_event(ism->waitq, !atomic_read(&ism->free_clients_cnt)); 710 spin_lock_irqsave(&clients_lock, flags); 711 for (i = 0; i < max_client; ++i) 712 if (clients[i]) { 713 INIT_WORK(&clients[i]->remove_work, 714 ism_dev_remove_work_func); 715 clients[i]->tgt_ism = ism; 716 atomic_inc(&ism->free_clients_cnt); 717 schedule_work(&clients[i]->remove_work); 718 } 719 spin_unlock_irqrestore(&clients_lock, flags); 720 721 wait_event(ism->waitq, !atomic_read(&ism->free_clients_cnt)); 722 723 if (SYSTEM_EID.serial_number[0] != '0' || 724 SYSTEM_EID.type[0] != '0') 725 ism_del_vlan_id(ism, ISM_RESERVED_VLANID); 726 unregister_ieq(ism); 727 unregister_sba(ism); 728 free_irq(pci_irq_vector(pdev, 0), ism); 729 kfree(ism->sba_client_arr); 730 pci_free_irq_vectors(pdev); 731 list_del_init(&ism->list); 732 } 733 734 static void ism_remove(struct pci_dev *pdev) 735 { 736 struct ism_dev *ism = dev_get_drvdata(&pdev->dev); 737 738 mutex_lock(&ism_dev_list.mutex); 739 ism_dev_exit(ism); 740 mutex_unlock(&ism_dev_list.mutex); 741 742 pci_clear_master(pdev); 743 pci_release_mem_regions(pdev); 744 pci_disable_device(pdev); 745 device_del(&ism->dev); 746 dev_set_drvdata(&pdev->dev, NULL); 747 kfree(ism); 748 } 749 750 static struct pci_driver ism_driver = { 751 .name = DRV_NAME, 752 .id_table = ism_device_table, 753 .probe = ism_probe, 754 .remove = ism_remove, 755 }; 756 757 static int __init ism_init(void) 758 { 759 int ret; 760 761 ism_debug_info = debug_register("ism", 2, 1, 16); 762 if (!ism_debug_info) 763 return -ENODEV; 764 765 memset(clients, 0, sizeof(clients)); 766 max_client = 0; 767 debug_register_view(ism_debug_info, &debug_hex_ascii_view); 768 ret = pci_register_driver(&ism_driver); 769 if (ret) 770 debug_unregister(ism_debug_info); 771 772 return ret; 773 } 774 775 static void __exit ism_exit(void) 776 { 777 struct ism_dev *ism; 778 779 mutex_lock(&ism_dev_list.mutex); 780 list_for_each_entry(ism, &ism_dev_list.list, list) { 781 ism_dev_exit(ism); 782 } 783 mutex_unlock(&ism_dev_list.mutex); 784 785 pci_unregister_driver(&ism_driver); 786 debug_unregister(ism_debug_info); 787 } 788 789 module_init(ism_init); 790 module_exit(ism_exit); 791 792 /*************************** SMC-D Implementation *****************************/ 793 794 #if IS_ENABLED(CONFIG_SMC) 795 static int smcd_query_rgid(struct smcd_dev *smcd, u64 rgid, u32 vid_valid, 796 u32 vid) 797 { 798 return ism_query_rgid(smcd->priv, rgid, vid_valid, vid); 799 } 800 801 static int smcd_register_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb, 802 struct ism_client *client) 803 { 804 return ism_register_dmb(smcd->priv, (struct ism_dmb *)dmb, client); 805 } 806 807 static int smcd_unregister_dmb(struct smcd_dev *smcd, struct smcd_dmb *dmb) 808 { 809 return ism_unregister_dmb(smcd->priv, (struct ism_dmb *)dmb); 810 } 811 812 static int smcd_add_vlan_id(struct smcd_dev *smcd, u64 vlan_id) 813 { 814 return ism_add_vlan_id(smcd->priv, vlan_id); 815 } 816 817 static int smcd_del_vlan_id(struct smcd_dev *smcd, u64 vlan_id) 818 { 819 return ism_del_vlan_id(smcd->priv, vlan_id); 820 } 821 822 static int smcd_set_vlan_required(struct smcd_dev *smcd) 823 { 824 return ism_cmd_simple(smcd->priv, ISM_SET_VLAN); 825 } 826 827 static int smcd_reset_vlan_required(struct smcd_dev *smcd) 828 { 829 return ism_cmd_simple(smcd->priv, ISM_RESET_VLAN); 830 } 831 832 static int smcd_signal_ieq(struct smcd_dev *smcd, u64 rgid, u32 trigger_irq, 833 u32 event_code, u64 info) 834 { 835 return ism_signal_ieq(smcd->priv, rgid, trigger_irq, event_code, info); 836 } 837 838 static int smcd_move(struct smcd_dev *smcd, u64 dmb_tok, unsigned int idx, 839 bool sf, unsigned int offset, void *data, 840 unsigned int size) 841 { 842 return ism_move(smcd->priv, dmb_tok, idx, sf, offset, data, size); 843 } 844 845 static u64 smcd_get_local_gid(struct smcd_dev *smcd) 846 { 847 return ism_get_local_gid(smcd->priv); 848 } 849 850 static u16 smcd_get_chid(struct smcd_dev *smcd) 851 { 852 return ism_get_chid(smcd->priv); 853 } 854 855 static inline struct device *smcd_get_dev(struct smcd_dev *dev) 856 { 857 struct ism_dev *ism = dev->priv; 858 859 return &ism->dev; 860 } 861 862 static const struct smcd_ops ism_ops = { 863 .query_remote_gid = smcd_query_rgid, 864 .register_dmb = smcd_register_dmb, 865 .unregister_dmb = smcd_unregister_dmb, 866 .add_vlan_id = smcd_add_vlan_id, 867 .del_vlan_id = smcd_del_vlan_id, 868 .set_vlan_required = smcd_set_vlan_required, 869 .reset_vlan_required = smcd_reset_vlan_required, 870 .signal_event = smcd_signal_ieq, 871 .move_data = smcd_move, 872 .get_system_eid = ism_get_seid, 873 .get_local_gid = smcd_get_local_gid, 874 .get_chid = smcd_get_chid, 875 .get_dev = smcd_get_dev, 876 }; 877 878 const struct smcd_ops *ism_get_smcd_ops(void) 879 { 880 return &ism_ops; 881 } 882 EXPORT_SYMBOL_GPL(ism_get_smcd_ops); 883 #endif 884