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