1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * linux/drivers/net/ethernet/ibm/ehea/ehea_main.c 4 * 5 * eHEA ethernet device driver for IBM eServer System p 6 * 7 * (C) Copyright IBM Corp. 2006 8 * 9 * Authors: 10 * Christoph Raisch <raisch@de.ibm.com> 11 * Jan-Bernd Themann <themann@de.ibm.com> 12 * Thomas Klein <tklein@de.ibm.com> 13 */ 14 15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 16 17 #include <linux/device.h> 18 #include <linux/in.h> 19 #include <linux/ip.h> 20 #include <linux/tcp.h> 21 #include <linux/udp.h> 22 #include <linux/if.h> 23 #include <linux/list.h> 24 #include <linux/slab.h> 25 #include <linux/if_ether.h> 26 #include <linux/notifier.h> 27 #include <linux/reboot.h> 28 #include <linux/memory.h> 29 #include <asm/kexec.h> 30 #include <linux/mutex.h> 31 #include <linux/prefetch.h> 32 33 #include <net/ip.h> 34 35 #include "ehea.h" 36 #include "ehea_qmr.h" 37 #include "ehea_phyp.h" 38 39 40 MODULE_LICENSE("GPL"); 41 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>"); 42 MODULE_DESCRIPTION("IBM eServer HEA Driver"); 43 MODULE_VERSION(DRV_VERSION); 44 45 46 static int msg_level = -1; 47 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1; 48 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2; 49 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3; 50 static int sq_entries = EHEA_DEF_ENTRIES_SQ; 51 static int use_mcs = 1; 52 static int prop_carrier_state; 53 54 module_param(msg_level, int, 0); 55 module_param(rq1_entries, int, 0); 56 module_param(rq2_entries, int, 0); 57 module_param(rq3_entries, int, 0); 58 module_param(sq_entries, int, 0); 59 module_param(prop_carrier_state, int, 0); 60 module_param(use_mcs, int, 0); 61 62 MODULE_PARM_DESC(msg_level, "msg_level"); 63 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical " 64 "port to stack. 1:yes, 0:no. Default = 0 "); 65 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 " 66 "[2^x - 1], x = [7..14]. Default = " 67 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")"); 68 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 " 69 "[2^x - 1], x = [7..14]. Default = " 70 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")"); 71 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 " 72 "[2^x - 1], x = [7..14]. Default = " 73 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")"); 74 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue " 75 "[2^x - 1], x = [7..14]. Default = " 76 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); 77 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, " 78 "Default = 1"); 79 80 static int port_name_cnt; 81 static LIST_HEAD(adapter_list); 82 static unsigned long ehea_driver_flags; 83 static DEFINE_MUTEX(dlpar_mem_lock); 84 static struct ehea_fw_handle_array ehea_fw_handles; 85 static struct ehea_bcmc_reg_array ehea_bcmc_regs; 86 87 88 static int ehea_probe_adapter(struct platform_device *dev); 89 90 static int ehea_remove(struct platform_device *dev); 91 92 static const struct of_device_id ehea_module_device_table[] = { 93 { 94 .name = "lhea", 95 .compatible = "IBM,lhea", 96 }, 97 { 98 .type = "network", 99 .compatible = "IBM,lhea-ethernet", 100 }, 101 {}, 102 }; 103 MODULE_DEVICE_TABLE(of, ehea_module_device_table); 104 105 static const struct of_device_id ehea_device_table[] = { 106 { 107 .name = "lhea", 108 .compatible = "IBM,lhea", 109 }, 110 {}, 111 }; 112 MODULE_DEVICE_TABLE(of, ehea_device_table); 113 114 static struct platform_driver ehea_driver = { 115 .driver = { 116 .name = "ehea", 117 .owner = THIS_MODULE, 118 .of_match_table = ehea_device_table, 119 }, 120 .probe = ehea_probe_adapter, 121 .remove = ehea_remove, 122 }; 123 124 void ehea_dump(void *adr, int len, char *msg) 125 { 126 int x; 127 unsigned char *deb = adr; 128 for (x = 0; x < len; x += 16) { 129 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n", 130 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8])); 131 deb += 16; 132 } 133 } 134 135 static void ehea_schedule_port_reset(struct ehea_port *port) 136 { 137 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags)) 138 schedule_work(&port->reset_task); 139 } 140 141 static void ehea_update_firmware_handles(void) 142 { 143 struct ehea_fw_handle_entry *arr = NULL; 144 struct ehea_adapter *adapter; 145 int num_adapters = 0; 146 int num_ports = 0; 147 int num_portres = 0; 148 int i = 0; 149 int num_fw_handles, k, l; 150 151 /* Determine number of handles */ 152 mutex_lock(&ehea_fw_handles.lock); 153 154 list_for_each_entry(adapter, &adapter_list, list) { 155 num_adapters++; 156 157 for (k = 0; k < EHEA_MAX_PORTS; k++) { 158 struct ehea_port *port = adapter->port[k]; 159 160 if (!port || (port->state != EHEA_PORT_UP)) 161 continue; 162 163 num_ports++; 164 num_portres += port->num_def_qps; 165 } 166 } 167 168 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES + 169 num_ports * EHEA_NUM_PORT_FW_HANDLES + 170 num_portres * EHEA_NUM_PORTRES_FW_HANDLES; 171 172 if (num_fw_handles) { 173 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL); 174 if (!arr) 175 goto out; /* Keep the existing array */ 176 } else 177 goto out_update; 178 179 list_for_each_entry(adapter, &adapter_list, list) { 180 if (num_adapters == 0) 181 break; 182 183 for (k = 0; k < EHEA_MAX_PORTS; k++) { 184 struct ehea_port *port = adapter->port[k]; 185 186 if (!port || (port->state != EHEA_PORT_UP) || 187 (num_ports == 0)) 188 continue; 189 190 for (l = 0; l < port->num_def_qps; l++) { 191 struct ehea_port_res *pr = &port->port_res[l]; 192 193 arr[i].adh = adapter->handle; 194 arr[i++].fwh = pr->qp->fw_handle; 195 arr[i].adh = adapter->handle; 196 arr[i++].fwh = pr->send_cq->fw_handle; 197 arr[i].adh = adapter->handle; 198 arr[i++].fwh = pr->recv_cq->fw_handle; 199 arr[i].adh = adapter->handle; 200 arr[i++].fwh = pr->eq->fw_handle; 201 arr[i].adh = adapter->handle; 202 arr[i++].fwh = pr->send_mr.handle; 203 arr[i].adh = adapter->handle; 204 arr[i++].fwh = pr->recv_mr.handle; 205 } 206 arr[i].adh = adapter->handle; 207 arr[i++].fwh = port->qp_eq->fw_handle; 208 num_ports--; 209 } 210 211 arr[i].adh = adapter->handle; 212 arr[i++].fwh = adapter->neq->fw_handle; 213 214 if (adapter->mr.handle) { 215 arr[i].adh = adapter->handle; 216 arr[i++].fwh = adapter->mr.handle; 217 } 218 num_adapters--; 219 } 220 221 out_update: 222 kfree(ehea_fw_handles.arr); 223 ehea_fw_handles.arr = arr; 224 ehea_fw_handles.num_entries = i; 225 out: 226 mutex_unlock(&ehea_fw_handles.lock); 227 } 228 229 static void ehea_update_bcmc_registrations(void) 230 { 231 unsigned long flags; 232 struct ehea_bcmc_reg_entry *arr = NULL; 233 struct ehea_adapter *adapter; 234 struct ehea_mc_list *mc_entry; 235 int num_registrations = 0; 236 int i = 0; 237 int k; 238 239 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags); 240 241 /* Determine number of registrations */ 242 list_for_each_entry(adapter, &adapter_list, list) 243 for (k = 0; k < EHEA_MAX_PORTS; k++) { 244 struct ehea_port *port = adapter->port[k]; 245 246 if (!port || (port->state != EHEA_PORT_UP)) 247 continue; 248 249 num_registrations += 2; /* Broadcast registrations */ 250 251 list_for_each_entry(mc_entry, &port->mc_list->list,list) 252 num_registrations += 2; 253 } 254 255 if (num_registrations) { 256 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC); 257 if (!arr) 258 goto out; /* Keep the existing array */ 259 } else 260 goto out_update; 261 262 list_for_each_entry(adapter, &adapter_list, list) { 263 for (k = 0; k < EHEA_MAX_PORTS; k++) { 264 struct ehea_port *port = adapter->port[k]; 265 266 if (!port || (port->state != EHEA_PORT_UP)) 267 continue; 268 269 if (num_registrations == 0) 270 goto out_update; 271 272 arr[i].adh = adapter->handle; 273 arr[i].port_id = port->logical_port_id; 274 arr[i].reg_type = EHEA_BCMC_BROADCAST | 275 EHEA_BCMC_UNTAGGED; 276 arr[i++].macaddr = port->mac_addr; 277 278 arr[i].adh = adapter->handle; 279 arr[i].port_id = port->logical_port_id; 280 arr[i].reg_type = EHEA_BCMC_BROADCAST | 281 EHEA_BCMC_VLANID_ALL; 282 arr[i++].macaddr = port->mac_addr; 283 num_registrations -= 2; 284 285 list_for_each_entry(mc_entry, 286 &port->mc_list->list, list) { 287 if (num_registrations == 0) 288 goto out_update; 289 290 arr[i].adh = adapter->handle; 291 arr[i].port_id = port->logical_port_id; 292 arr[i].reg_type = EHEA_BCMC_MULTICAST | 293 EHEA_BCMC_UNTAGGED; 294 if (mc_entry->macaddr == 0) 295 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 296 arr[i++].macaddr = mc_entry->macaddr; 297 298 arr[i].adh = adapter->handle; 299 arr[i].port_id = port->logical_port_id; 300 arr[i].reg_type = EHEA_BCMC_MULTICAST | 301 EHEA_BCMC_VLANID_ALL; 302 if (mc_entry->macaddr == 0) 303 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 304 arr[i++].macaddr = mc_entry->macaddr; 305 num_registrations -= 2; 306 } 307 } 308 } 309 310 out_update: 311 kfree(ehea_bcmc_regs.arr); 312 ehea_bcmc_regs.arr = arr; 313 ehea_bcmc_regs.num_entries = i; 314 out: 315 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags); 316 } 317 318 static void ehea_get_stats64(struct net_device *dev, 319 struct rtnl_link_stats64 *stats) 320 { 321 struct ehea_port *port = netdev_priv(dev); 322 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0; 323 int i; 324 325 for (i = 0; i < port->num_def_qps; i++) { 326 rx_packets += port->port_res[i].rx_packets; 327 rx_bytes += port->port_res[i].rx_bytes; 328 } 329 330 for (i = 0; i < port->num_def_qps; i++) { 331 tx_packets += port->port_res[i].tx_packets; 332 tx_bytes += port->port_res[i].tx_bytes; 333 } 334 335 stats->tx_packets = tx_packets; 336 stats->rx_bytes = rx_bytes; 337 stats->tx_bytes = tx_bytes; 338 stats->rx_packets = rx_packets; 339 340 stats->multicast = port->stats.multicast; 341 stats->rx_errors = port->stats.rx_errors; 342 } 343 344 static void ehea_update_stats(struct work_struct *work) 345 { 346 struct ehea_port *port = 347 container_of(work, struct ehea_port, stats_work.work); 348 struct net_device *dev = port->netdev; 349 struct rtnl_link_stats64 *stats = &port->stats; 350 struct hcp_ehea_port_cb2 *cb2; 351 u64 hret; 352 353 cb2 = (void *)get_zeroed_page(GFP_KERNEL); 354 if (!cb2) { 355 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n"); 356 goto resched; 357 } 358 359 hret = ehea_h_query_ehea_port(port->adapter->handle, 360 port->logical_port_id, 361 H_PORT_CB2, H_PORT_CB2_ALL, cb2); 362 if (hret != H_SUCCESS) { 363 netdev_err(dev, "query_ehea_port failed\n"); 364 goto out_herr; 365 } 366 367 if (netif_msg_hw(port)) 368 ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); 369 370 stats->multicast = cb2->rxmcp; 371 stats->rx_errors = cb2->rxuerr; 372 373 out_herr: 374 free_page((unsigned long)cb2); 375 resched: 376 schedule_delayed_work(&port->stats_work, 377 round_jiffies_relative(msecs_to_jiffies(1000))); 378 } 379 380 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) 381 { 382 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 383 struct net_device *dev = pr->port->netdev; 384 int max_index_mask = pr->rq1_skba.len - 1; 385 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; 386 int adder = 0; 387 int i; 388 389 pr->rq1_skba.os_skbs = 0; 390 391 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 392 if (nr_of_wqes > 0) 393 pr->rq1_skba.index = index; 394 pr->rq1_skba.os_skbs = fill_wqes; 395 return; 396 } 397 398 for (i = 0; i < fill_wqes; i++) { 399 if (!skb_arr_rq1[index]) { 400 skb_arr_rq1[index] = netdev_alloc_skb(dev, 401 EHEA_L_PKT_SIZE); 402 if (!skb_arr_rq1[index]) { 403 pr->rq1_skba.os_skbs = fill_wqes - i; 404 break; 405 } 406 } 407 index--; 408 index &= max_index_mask; 409 adder++; 410 } 411 412 if (adder == 0) 413 return; 414 415 /* Ring doorbell */ 416 ehea_update_rq1a(pr->qp, adder); 417 } 418 419 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) 420 { 421 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 422 struct net_device *dev = pr->port->netdev; 423 int i; 424 425 if (nr_rq1a > pr->rq1_skba.len) { 426 netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); 427 return; 428 } 429 430 for (i = 0; i < nr_rq1a; i++) { 431 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); 432 if (!skb_arr_rq1[i]) 433 break; 434 } 435 /* Ring doorbell */ 436 ehea_update_rq1a(pr->qp, i - 1); 437 } 438 439 static int ehea_refill_rq_def(struct ehea_port_res *pr, 440 struct ehea_q_skb_arr *q_skba, int rq_nr, 441 int num_wqes, int wqe_type, int packet_size) 442 { 443 struct net_device *dev = pr->port->netdev; 444 struct ehea_qp *qp = pr->qp; 445 struct sk_buff **skb_arr = q_skba->arr; 446 struct ehea_rwqe *rwqe; 447 int i, index, max_index_mask, fill_wqes; 448 int adder = 0; 449 int ret = 0; 450 451 fill_wqes = q_skba->os_skbs + num_wqes; 452 q_skba->os_skbs = 0; 453 454 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 455 q_skba->os_skbs = fill_wqes; 456 return ret; 457 } 458 459 index = q_skba->index; 460 max_index_mask = q_skba->len - 1; 461 for (i = 0; i < fill_wqes; i++) { 462 u64 tmp_addr; 463 struct sk_buff *skb; 464 465 skb = netdev_alloc_skb_ip_align(dev, packet_size); 466 if (!skb) { 467 q_skba->os_skbs = fill_wqes - i; 468 if (q_skba->os_skbs == q_skba->len - 2) { 469 netdev_info(pr->port->netdev, 470 "rq%i ran dry - no mem for skb\n", 471 rq_nr); 472 ret = -ENOMEM; 473 } 474 break; 475 } 476 477 skb_arr[index] = skb; 478 tmp_addr = ehea_map_vaddr(skb->data); 479 if (tmp_addr == -1) { 480 dev_consume_skb_any(skb); 481 q_skba->os_skbs = fill_wqes - i; 482 ret = 0; 483 break; 484 } 485 486 rwqe = ehea_get_next_rwqe(qp, rq_nr); 487 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type) 488 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index); 489 rwqe->sg_list[0].l_key = pr->recv_mr.lkey; 490 rwqe->sg_list[0].vaddr = tmp_addr; 491 rwqe->sg_list[0].len = packet_size; 492 rwqe->data_segments = 1; 493 494 index++; 495 index &= max_index_mask; 496 adder++; 497 } 498 499 q_skba->index = index; 500 if (adder == 0) 501 goto out; 502 503 /* Ring doorbell */ 504 iosync(); 505 if (rq_nr == 2) 506 ehea_update_rq2a(pr->qp, adder); 507 else 508 ehea_update_rq3a(pr->qp, adder); 509 out: 510 return ret; 511 } 512 513 514 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) 515 { 516 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, 517 nr_of_wqes, EHEA_RWQE2_TYPE, 518 EHEA_RQ2_PKT_SIZE); 519 } 520 521 522 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) 523 { 524 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, 525 nr_of_wqes, EHEA_RWQE3_TYPE, 526 EHEA_MAX_PACKET_SIZE); 527 } 528 529 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) 530 { 531 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; 532 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) 533 return 0; 534 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && 535 (cqe->header_length == 0)) 536 return 0; 537 return -EINVAL; 538 } 539 540 static inline void ehea_fill_skb(struct net_device *dev, 541 struct sk_buff *skb, struct ehea_cqe *cqe, 542 struct ehea_port_res *pr) 543 { 544 int length = cqe->num_bytes_transfered - 4; /*remove CRC */ 545 546 skb_put(skb, length); 547 skb->protocol = eth_type_trans(skb, dev); 548 549 /* The packet was not an IPV4 packet so a complemented checksum was 550 calculated. The value is found in the Internet Checksum field. */ 551 if (cqe->status & EHEA_CQE_BLIND_CKSUM) { 552 skb->ip_summed = CHECKSUM_COMPLETE; 553 skb->csum = csum_unfold(~cqe->inet_checksum_value); 554 } else 555 skb->ip_summed = CHECKSUM_UNNECESSARY; 556 557 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]); 558 } 559 560 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, 561 int arr_len, 562 struct ehea_cqe *cqe) 563 { 564 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 565 struct sk_buff *skb; 566 void *pref; 567 int x; 568 569 x = skb_index + 1; 570 x &= (arr_len - 1); 571 572 pref = skb_array[x]; 573 if (pref) { 574 prefetchw(pref); 575 prefetchw(pref + EHEA_CACHE_LINE); 576 577 pref = (skb_array[x]->data); 578 prefetch(pref); 579 prefetch(pref + EHEA_CACHE_LINE); 580 prefetch(pref + EHEA_CACHE_LINE * 2); 581 prefetch(pref + EHEA_CACHE_LINE * 3); 582 } 583 584 skb = skb_array[skb_index]; 585 skb_array[skb_index] = NULL; 586 return skb; 587 } 588 589 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, 590 int arr_len, int wqe_index) 591 { 592 struct sk_buff *skb; 593 void *pref; 594 int x; 595 596 x = wqe_index + 1; 597 x &= (arr_len - 1); 598 599 pref = skb_array[x]; 600 if (pref) { 601 prefetchw(pref); 602 prefetchw(pref + EHEA_CACHE_LINE); 603 604 pref = (skb_array[x]->data); 605 prefetchw(pref); 606 prefetchw(pref + EHEA_CACHE_LINE); 607 } 608 609 skb = skb_array[wqe_index]; 610 skb_array[wqe_index] = NULL; 611 return skb; 612 } 613 614 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, 615 struct ehea_cqe *cqe, int *processed_rq2, 616 int *processed_rq3) 617 { 618 struct sk_buff *skb; 619 620 if (cqe->status & EHEA_CQE_STAT_ERR_TCP) 621 pr->p_stats.err_tcp_cksum++; 622 if (cqe->status & EHEA_CQE_STAT_ERR_IP) 623 pr->p_stats.err_ip_cksum++; 624 if (cqe->status & EHEA_CQE_STAT_ERR_CRC) 625 pr->p_stats.err_frame_crc++; 626 627 if (rq == 2) { 628 *processed_rq2 += 1; 629 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe); 630 dev_kfree_skb(skb); 631 } else if (rq == 3) { 632 *processed_rq3 += 1; 633 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe); 634 dev_kfree_skb(skb); 635 } 636 637 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) { 638 if (netif_msg_rx_err(pr->port)) { 639 pr_err("Critical receive error for QP %d. Resetting port.\n", 640 pr->qp->init_attr.qp_nr); 641 ehea_dump(cqe, sizeof(*cqe), "CQE"); 642 } 643 ehea_schedule_port_reset(pr->port); 644 return 1; 645 } 646 647 return 0; 648 } 649 650 static int ehea_proc_rwqes(struct net_device *dev, 651 struct ehea_port_res *pr, 652 int budget) 653 { 654 struct ehea_port *port = pr->port; 655 struct ehea_qp *qp = pr->qp; 656 struct ehea_cqe *cqe; 657 struct sk_buff *skb; 658 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 659 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; 660 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; 661 int skb_arr_rq1_len = pr->rq1_skba.len; 662 int skb_arr_rq2_len = pr->rq2_skba.len; 663 int skb_arr_rq3_len = pr->rq3_skba.len; 664 int processed, processed_rq1, processed_rq2, processed_rq3; 665 u64 processed_bytes = 0; 666 int wqe_index, last_wqe_index, rq, port_reset; 667 668 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; 669 last_wqe_index = 0; 670 671 cqe = ehea_poll_rq1(qp, &wqe_index); 672 while ((processed < budget) && cqe) { 673 ehea_inc_rq1(qp); 674 processed_rq1++; 675 processed++; 676 if (netif_msg_rx_status(port)) 677 ehea_dump(cqe, sizeof(*cqe), "CQE"); 678 679 last_wqe_index = wqe_index; 680 rmb(); 681 if (!ehea_check_cqe(cqe, &rq)) { 682 if (rq == 1) { 683 /* LL RQ1 */ 684 skb = get_skb_by_index_ll(skb_arr_rq1, 685 skb_arr_rq1_len, 686 wqe_index); 687 if (unlikely(!skb)) { 688 netif_info(port, rx_err, dev, 689 "LL rq1: skb=NULL\n"); 690 691 skb = netdev_alloc_skb(dev, 692 EHEA_L_PKT_SIZE); 693 if (!skb) 694 break; 695 } 696 skb_copy_to_linear_data(skb, ((char *)cqe) + 64, 697 cqe->num_bytes_transfered - 4); 698 ehea_fill_skb(dev, skb, cqe, pr); 699 } else if (rq == 2) { 700 /* RQ2 */ 701 skb = get_skb_by_index(skb_arr_rq2, 702 skb_arr_rq2_len, cqe); 703 if (unlikely(!skb)) { 704 netif_err(port, rx_err, dev, 705 "rq2: skb=NULL\n"); 706 break; 707 } 708 ehea_fill_skb(dev, skb, cqe, pr); 709 processed_rq2++; 710 } else { 711 /* RQ3 */ 712 skb = get_skb_by_index(skb_arr_rq3, 713 skb_arr_rq3_len, cqe); 714 if (unlikely(!skb)) { 715 netif_err(port, rx_err, dev, 716 "rq3: skb=NULL\n"); 717 break; 718 } 719 ehea_fill_skb(dev, skb, cqe, pr); 720 processed_rq3++; 721 } 722 723 processed_bytes += skb->len; 724 725 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 726 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 727 cqe->vlan_tag); 728 729 napi_gro_receive(&pr->napi, skb); 730 } else { 731 pr->p_stats.poll_receive_errors++; 732 port_reset = ehea_treat_poll_error(pr, rq, cqe, 733 &processed_rq2, 734 &processed_rq3); 735 if (port_reset) 736 break; 737 } 738 cqe = ehea_poll_rq1(qp, &wqe_index); 739 } 740 741 pr->rx_packets += processed; 742 pr->rx_bytes += processed_bytes; 743 744 ehea_refill_rq1(pr, last_wqe_index, processed_rq1); 745 ehea_refill_rq2(pr, processed_rq2); 746 ehea_refill_rq3(pr, processed_rq3); 747 748 return processed; 749 } 750 751 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull 752 753 static void reset_sq_restart_flag(struct ehea_port *port) 754 { 755 int i; 756 757 for (i = 0; i < port->num_def_qps; i++) { 758 struct ehea_port_res *pr = &port->port_res[i]; 759 pr->sq_restart_flag = 0; 760 } 761 wake_up(&port->restart_wq); 762 } 763 764 static void check_sqs(struct ehea_port *port) 765 { 766 struct ehea_swqe *swqe; 767 int swqe_index; 768 int i; 769 770 for (i = 0; i < port->num_def_qps; i++) { 771 struct ehea_port_res *pr = &port->port_res[i]; 772 int ret; 773 swqe = ehea_get_swqe(pr->qp, &swqe_index); 774 memset(swqe, 0, SWQE_HEADER_SIZE); 775 atomic_dec(&pr->swqe_avail); 776 777 swqe->tx_control |= EHEA_SWQE_PURGE; 778 swqe->wr_id = SWQE_RESTART_CHECK; 779 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 780 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; 781 swqe->immediate_data_length = 80; 782 783 ehea_post_swqe(pr->qp, swqe); 784 785 ret = wait_event_timeout(port->restart_wq, 786 pr->sq_restart_flag == 0, 787 msecs_to_jiffies(100)); 788 789 if (!ret) { 790 pr_err("HW/SW queues out of sync\n"); 791 ehea_schedule_port_reset(pr->port); 792 return; 793 } 794 } 795 } 796 797 798 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) 799 { 800 struct sk_buff *skb; 801 struct ehea_cq *send_cq = pr->send_cq; 802 struct ehea_cqe *cqe; 803 int quota = my_quota; 804 int cqe_counter = 0; 805 int swqe_av = 0; 806 int index; 807 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, 808 pr - &pr->port->port_res[0]); 809 810 cqe = ehea_poll_cq(send_cq); 811 while (cqe && (quota > 0)) { 812 ehea_inc_cq(send_cq); 813 814 cqe_counter++; 815 rmb(); 816 817 if (cqe->wr_id == SWQE_RESTART_CHECK) { 818 pr->sq_restart_flag = 1; 819 swqe_av++; 820 break; 821 } 822 823 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { 824 pr_err("Bad send completion status=0x%04X\n", 825 cqe->status); 826 827 if (netif_msg_tx_err(pr->port)) 828 ehea_dump(cqe, sizeof(*cqe), "Send CQE"); 829 830 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { 831 pr_err("Resetting port\n"); 832 ehea_schedule_port_reset(pr->port); 833 break; 834 } 835 } 836 837 if (netif_msg_tx_done(pr->port)) 838 ehea_dump(cqe, sizeof(*cqe), "CQE"); 839 840 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) 841 == EHEA_SWQE2_TYPE)) { 842 843 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 844 skb = pr->sq_skba.arr[index]; 845 dev_consume_skb_any(skb); 846 pr->sq_skba.arr[index] = NULL; 847 } 848 849 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); 850 quota--; 851 852 cqe = ehea_poll_cq(send_cq); 853 } 854 855 ehea_update_feca(send_cq, cqe_counter); 856 atomic_add(swqe_av, &pr->swqe_avail); 857 858 if (unlikely(netif_tx_queue_stopped(txq) && 859 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { 860 __netif_tx_lock(txq, smp_processor_id()); 861 if (netif_tx_queue_stopped(txq) && 862 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) 863 netif_tx_wake_queue(txq); 864 __netif_tx_unlock(txq); 865 } 866 867 wake_up(&pr->port->swqe_avail_wq); 868 869 return cqe; 870 } 871 872 #define EHEA_POLL_MAX_CQES 65535 873 874 static int ehea_poll(struct napi_struct *napi, int budget) 875 { 876 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, 877 napi); 878 struct net_device *dev = pr->port->netdev; 879 struct ehea_cqe *cqe; 880 struct ehea_cqe *cqe_skb = NULL; 881 int wqe_index; 882 int rx = 0; 883 884 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 885 rx += ehea_proc_rwqes(dev, pr, budget - rx); 886 887 while (rx != budget) { 888 napi_complete(napi); 889 ehea_reset_cq_ep(pr->recv_cq); 890 ehea_reset_cq_ep(pr->send_cq); 891 ehea_reset_cq_n1(pr->recv_cq); 892 ehea_reset_cq_n1(pr->send_cq); 893 rmb(); 894 cqe = ehea_poll_rq1(pr->qp, &wqe_index); 895 cqe_skb = ehea_poll_cq(pr->send_cq); 896 897 if (!cqe && !cqe_skb) 898 return rx; 899 900 if (!napi_reschedule(napi)) 901 return rx; 902 903 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 904 rx += ehea_proc_rwqes(dev, pr, budget - rx); 905 } 906 907 return rx; 908 } 909 910 static irqreturn_t ehea_recv_irq_handler(int irq, void *param) 911 { 912 struct ehea_port_res *pr = param; 913 914 napi_schedule(&pr->napi); 915 916 return IRQ_HANDLED; 917 } 918 919 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) 920 { 921 struct ehea_port *port = param; 922 struct ehea_eqe *eqe; 923 struct ehea_qp *qp; 924 u32 qp_token; 925 u64 resource_type, aer, aerr; 926 int reset_port = 0; 927 928 eqe = ehea_poll_eq(port->qp_eq); 929 930 while (eqe) { 931 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); 932 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", 933 eqe->entry, qp_token); 934 935 qp = port->port_res[qp_token].qp; 936 937 resource_type = ehea_error_data(port->adapter, qp->fw_handle, 938 &aer, &aerr); 939 940 if (resource_type == EHEA_AER_RESTYPE_QP) { 941 if ((aer & EHEA_AER_RESET_MASK) || 942 (aerr & EHEA_AERR_RESET_MASK)) 943 reset_port = 1; 944 } else 945 reset_port = 1; /* Reset in case of CQ or EQ error */ 946 947 eqe = ehea_poll_eq(port->qp_eq); 948 } 949 950 if (reset_port) { 951 pr_err("Resetting port\n"); 952 ehea_schedule_port_reset(port); 953 } 954 955 return IRQ_HANDLED; 956 } 957 958 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, 959 int logical_port) 960 { 961 int i; 962 963 for (i = 0; i < EHEA_MAX_PORTS; i++) 964 if (adapter->port[i]) 965 if (adapter->port[i]->logical_port_id == logical_port) 966 return adapter->port[i]; 967 return NULL; 968 } 969 970 int ehea_sense_port_attr(struct ehea_port *port) 971 { 972 int ret; 973 u64 hret; 974 struct hcp_ehea_port_cb0 *cb0; 975 976 /* may be called via ehea_neq_tasklet() */ 977 cb0 = (void *)get_zeroed_page(GFP_ATOMIC); 978 if (!cb0) { 979 pr_err("no mem for cb0\n"); 980 ret = -ENOMEM; 981 goto out; 982 } 983 984 hret = ehea_h_query_ehea_port(port->adapter->handle, 985 port->logical_port_id, H_PORT_CB0, 986 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), 987 cb0); 988 if (hret != H_SUCCESS) { 989 ret = -EIO; 990 goto out_free; 991 } 992 993 /* MAC address */ 994 port->mac_addr = cb0->port_mac_addr << 16; 995 996 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { 997 ret = -EADDRNOTAVAIL; 998 goto out_free; 999 } 1000 1001 /* Port speed */ 1002 switch (cb0->port_speed) { 1003 case H_SPEED_10M_H: 1004 port->port_speed = EHEA_SPEED_10M; 1005 port->full_duplex = 0; 1006 break; 1007 case H_SPEED_10M_F: 1008 port->port_speed = EHEA_SPEED_10M; 1009 port->full_duplex = 1; 1010 break; 1011 case H_SPEED_100M_H: 1012 port->port_speed = EHEA_SPEED_100M; 1013 port->full_duplex = 0; 1014 break; 1015 case H_SPEED_100M_F: 1016 port->port_speed = EHEA_SPEED_100M; 1017 port->full_duplex = 1; 1018 break; 1019 case H_SPEED_1G_F: 1020 port->port_speed = EHEA_SPEED_1G; 1021 port->full_duplex = 1; 1022 break; 1023 case H_SPEED_10G_F: 1024 port->port_speed = EHEA_SPEED_10G; 1025 port->full_duplex = 1; 1026 break; 1027 default: 1028 port->port_speed = 0; 1029 port->full_duplex = 0; 1030 break; 1031 } 1032 1033 port->autoneg = 1; 1034 port->num_mcs = cb0->num_default_qps; 1035 1036 /* Number of default QPs */ 1037 if (use_mcs) 1038 port->num_def_qps = cb0->num_default_qps; 1039 else 1040 port->num_def_qps = 1; 1041 1042 if (!port->num_def_qps) { 1043 ret = -EINVAL; 1044 goto out_free; 1045 } 1046 1047 ret = 0; 1048 out_free: 1049 if (ret || netif_msg_probe(port)) 1050 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); 1051 free_page((unsigned long)cb0); 1052 out: 1053 return ret; 1054 } 1055 1056 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) 1057 { 1058 struct hcp_ehea_port_cb4 *cb4; 1059 u64 hret; 1060 int ret = 0; 1061 1062 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 1063 if (!cb4) { 1064 pr_err("no mem for cb4\n"); 1065 ret = -ENOMEM; 1066 goto out; 1067 } 1068 1069 cb4->port_speed = port_speed; 1070 1071 netif_carrier_off(port->netdev); 1072 1073 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1074 port->logical_port_id, 1075 H_PORT_CB4, H_PORT_CB4_SPEED, cb4); 1076 if (hret == H_SUCCESS) { 1077 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; 1078 1079 hret = ehea_h_query_ehea_port(port->adapter->handle, 1080 port->logical_port_id, 1081 H_PORT_CB4, H_PORT_CB4_SPEED, 1082 cb4); 1083 if (hret == H_SUCCESS) { 1084 switch (cb4->port_speed) { 1085 case H_SPEED_10M_H: 1086 port->port_speed = EHEA_SPEED_10M; 1087 port->full_duplex = 0; 1088 break; 1089 case H_SPEED_10M_F: 1090 port->port_speed = EHEA_SPEED_10M; 1091 port->full_duplex = 1; 1092 break; 1093 case H_SPEED_100M_H: 1094 port->port_speed = EHEA_SPEED_100M; 1095 port->full_duplex = 0; 1096 break; 1097 case H_SPEED_100M_F: 1098 port->port_speed = EHEA_SPEED_100M; 1099 port->full_duplex = 1; 1100 break; 1101 case H_SPEED_1G_F: 1102 port->port_speed = EHEA_SPEED_1G; 1103 port->full_duplex = 1; 1104 break; 1105 case H_SPEED_10G_F: 1106 port->port_speed = EHEA_SPEED_10G; 1107 port->full_duplex = 1; 1108 break; 1109 default: 1110 port->port_speed = 0; 1111 port->full_duplex = 0; 1112 break; 1113 } 1114 } else { 1115 pr_err("Failed sensing port speed\n"); 1116 ret = -EIO; 1117 } 1118 } else { 1119 if (hret == H_AUTHORITY) { 1120 pr_info("Hypervisor denied setting port speed\n"); 1121 ret = -EPERM; 1122 } else { 1123 ret = -EIO; 1124 pr_err("Failed setting port speed\n"); 1125 } 1126 } 1127 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) 1128 netif_carrier_on(port->netdev); 1129 1130 free_page((unsigned long)cb4); 1131 out: 1132 return ret; 1133 } 1134 1135 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) 1136 { 1137 int ret; 1138 u8 ec; 1139 u8 portnum; 1140 struct ehea_port *port; 1141 struct net_device *dev; 1142 1143 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); 1144 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); 1145 port = ehea_get_port(adapter, portnum); 1146 if (!port) { 1147 netdev_err(NULL, "unknown portnum %x\n", portnum); 1148 return; 1149 } 1150 dev = port->netdev; 1151 1152 switch (ec) { 1153 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1154 1155 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1156 if (!netif_carrier_ok(dev)) { 1157 ret = ehea_sense_port_attr(port); 1158 if (ret) { 1159 netdev_err(dev, "failed resensing port attributes\n"); 1160 break; 1161 } 1162 1163 netif_info(port, link, dev, 1164 "Logical port up: %dMbps %s Duplex\n", 1165 port->port_speed, 1166 port->full_duplex == 1 ? 1167 "Full" : "Half"); 1168 1169 netif_carrier_on(dev); 1170 netif_wake_queue(dev); 1171 } 1172 } else 1173 if (netif_carrier_ok(dev)) { 1174 netif_info(port, link, dev, 1175 "Logical port down\n"); 1176 netif_carrier_off(dev); 1177 netif_tx_disable(dev); 1178 } 1179 1180 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1181 port->phy_link = EHEA_PHY_LINK_UP; 1182 netif_info(port, link, dev, 1183 "Physical port up\n"); 1184 if (prop_carrier_state) 1185 netif_carrier_on(dev); 1186 } else { 1187 port->phy_link = EHEA_PHY_LINK_DOWN; 1188 netif_info(port, link, dev, 1189 "Physical port down\n"); 1190 if (prop_carrier_state) 1191 netif_carrier_off(dev); 1192 } 1193 1194 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1195 netdev_info(dev, 1196 "External switch port is primary port\n"); 1197 else 1198 netdev_info(dev, 1199 "External switch port is backup port\n"); 1200 1201 break; 1202 case EHEA_EC_ADAPTER_MALFUNC: 1203 netdev_err(dev, "Adapter malfunction\n"); 1204 break; 1205 case EHEA_EC_PORT_MALFUNC: 1206 netdev_info(dev, "Port malfunction\n"); 1207 netif_carrier_off(dev); 1208 netif_tx_disable(dev); 1209 break; 1210 default: 1211 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1212 break; 1213 } 1214 } 1215 1216 static void ehea_neq_tasklet(struct tasklet_struct *t) 1217 { 1218 struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet); 1219 struct ehea_eqe *eqe; 1220 u64 event_mask; 1221 1222 eqe = ehea_poll_eq(adapter->neq); 1223 pr_debug("eqe=%p\n", eqe); 1224 1225 while (eqe) { 1226 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1227 ehea_parse_eqe(adapter, eqe->entry); 1228 eqe = ehea_poll_eq(adapter->neq); 1229 pr_debug("next eqe=%p\n", eqe); 1230 } 1231 1232 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1233 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1234 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1235 1236 ehea_h_reset_events(adapter->handle, 1237 adapter->neq->fw_handle, event_mask); 1238 } 1239 1240 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1241 { 1242 struct ehea_adapter *adapter = param; 1243 tasklet_hi_schedule(&adapter->neq_tasklet); 1244 return IRQ_HANDLED; 1245 } 1246 1247 1248 static int ehea_fill_port_res(struct ehea_port_res *pr) 1249 { 1250 int ret; 1251 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1252 1253 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1254 1255 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1256 1257 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1258 1259 return ret; 1260 } 1261 1262 static int ehea_reg_interrupts(struct net_device *dev) 1263 { 1264 struct ehea_port *port = netdev_priv(dev); 1265 struct ehea_port_res *pr; 1266 int i, ret; 1267 1268 1269 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1270 dev->name); 1271 1272 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1273 ehea_qp_aff_irq_handler, 1274 0, port->int_aff_name, port); 1275 if (ret) { 1276 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1277 port->qp_eq->attr.ist1); 1278 goto out_free_qpeq; 1279 } 1280 1281 netif_info(port, ifup, dev, 1282 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1283 port->qp_eq->attr.ist1); 1284 1285 1286 for (i = 0; i < port->num_def_qps; i++) { 1287 pr = &port->port_res[i]; 1288 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1289 "%s-queue%d", dev->name, i); 1290 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1291 ehea_recv_irq_handler, 1292 0, pr->int_send_name, pr); 1293 if (ret) { 1294 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1295 i, pr->eq->attr.ist1); 1296 goto out_free_req; 1297 } 1298 netif_info(port, ifup, dev, 1299 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1300 pr->eq->attr.ist1, i); 1301 } 1302 out: 1303 return ret; 1304 1305 1306 out_free_req: 1307 while (--i >= 0) { 1308 u32 ist = port->port_res[i].eq->attr.ist1; 1309 ibmebus_free_irq(ist, &port->port_res[i]); 1310 } 1311 1312 out_free_qpeq: 1313 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1314 i = port->num_def_qps; 1315 1316 goto out; 1317 1318 } 1319 1320 static void ehea_free_interrupts(struct net_device *dev) 1321 { 1322 struct ehea_port *port = netdev_priv(dev); 1323 struct ehea_port_res *pr; 1324 int i; 1325 1326 /* send */ 1327 1328 for (i = 0; i < port->num_def_qps; i++) { 1329 pr = &port->port_res[i]; 1330 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1331 netif_info(port, intr, dev, 1332 "free send irq for res %d with handle 0x%X\n", 1333 i, pr->eq->attr.ist1); 1334 } 1335 1336 /* associated events */ 1337 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1338 netif_info(port, intr, dev, 1339 "associated event interrupt for handle 0x%X freed\n", 1340 port->qp_eq->attr.ist1); 1341 } 1342 1343 static int ehea_configure_port(struct ehea_port *port) 1344 { 1345 int ret, i; 1346 u64 hret, mask; 1347 struct hcp_ehea_port_cb0 *cb0; 1348 1349 ret = -ENOMEM; 1350 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1351 if (!cb0) 1352 goto out; 1353 1354 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1355 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1356 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1357 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1358 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1359 PXLY_RC_VLAN_FILTER) 1360 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1361 1362 for (i = 0; i < port->num_mcs; i++) 1363 if (use_mcs) 1364 cb0->default_qpn_arr[i] = 1365 port->port_res[i].qp->init_attr.qp_nr; 1366 else 1367 cb0->default_qpn_arr[i] = 1368 port->port_res[0].qp->init_attr.qp_nr; 1369 1370 if (netif_msg_ifup(port)) 1371 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1372 1373 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1374 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1375 1376 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1377 port->logical_port_id, 1378 H_PORT_CB0, mask, cb0); 1379 ret = -EIO; 1380 if (hret != H_SUCCESS) 1381 goto out_free; 1382 1383 ret = 0; 1384 1385 out_free: 1386 free_page((unsigned long)cb0); 1387 out: 1388 return ret; 1389 } 1390 1391 static int ehea_gen_smrs(struct ehea_port_res *pr) 1392 { 1393 int ret; 1394 struct ehea_adapter *adapter = pr->port->adapter; 1395 1396 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1397 if (ret) 1398 goto out; 1399 1400 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1401 if (ret) 1402 goto out_free; 1403 1404 return 0; 1405 1406 out_free: 1407 ehea_rem_mr(&pr->send_mr); 1408 out: 1409 pr_err("Generating SMRS failed\n"); 1410 return -EIO; 1411 } 1412 1413 static int ehea_rem_smrs(struct ehea_port_res *pr) 1414 { 1415 if ((ehea_rem_mr(&pr->send_mr)) || 1416 (ehea_rem_mr(&pr->recv_mr))) 1417 return -EIO; 1418 else 1419 return 0; 1420 } 1421 1422 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1423 { 1424 int arr_size = sizeof(void *) * max_q_entries; 1425 1426 q_skba->arr = vzalloc(arr_size); 1427 if (!q_skba->arr) 1428 return -ENOMEM; 1429 1430 q_skba->len = max_q_entries; 1431 q_skba->index = 0; 1432 q_skba->os_skbs = 0; 1433 1434 return 0; 1435 } 1436 1437 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1438 struct port_res_cfg *pr_cfg, int queue_token) 1439 { 1440 struct ehea_adapter *adapter = port->adapter; 1441 enum ehea_eq_type eq_type = EHEA_EQ; 1442 struct ehea_qp_init_attr *init_attr = NULL; 1443 int ret = -EIO; 1444 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1445 1446 tx_bytes = pr->tx_bytes; 1447 tx_packets = pr->tx_packets; 1448 rx_bytes = pr->rx_bytes; 1449 rx_packets = pr->rx_packets; 1450 1451 memset(pr, 0, sizeof(struct ehea_port_res)); 1452 1453 pr->tx_bytes = tx_bytes; 1454 pr->tx_packets = tx_packets; 1455 pr->rx_bytes = rx_bytes; 1456 pr->rx_packets = rx_packets; 1457 1458 pr->port = port; 1459 1460 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1461 if (!pr->eq) { 1462 pr_err("create_eq failed (eq)\n"); 1463 goto out_free; 1464 } 1465 1466 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1467 pr->eq->fw_handle, 1468 port->logical_port_id); 1469 if (!pr->recv_cq) { 1470 pr_err("create_cq failed (cq_recv)\n"); 1471 goto out_free; 1472 } 1473 1474 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1475 pr->eq->fw_handle, 1476 port->logical_port_id); 1477 if (!pr->send_cq) { 1478 pr_err("create_cq failed (cq_send)\n"); 1479 goto out_free; 1480 } 1481 1482 if (netif_msg_ifup(port)) 1483 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1484 pr->send_cq->attr.act_nr_of_cqes, 1485 pr->recv_cq->attr.act_nr_of_cqes); 1486 1487 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1488 if (!init_attr) { 1489 ret = -ENOMEM; 1490 pr_err("no mem for ehea_qp_init_attr\n"); 1491 goto out_free; 1492 } 1493 1494 init_attr->low_lat_rq1 = 1; 1495 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1496 init_attr->rq_count = 3; 1497 init_attr->qp_token = queue_token; 1498 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1499 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1500 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1501 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1502 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1503 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1504 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1505 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1506 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1507 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1508 init_attr->port_nr = port->logical_port_id; 1509 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1510 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1511 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1512 1513 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1514 if (!pr->qp) { 1515 pr_err("create_qp failed\n"); 1516 ret = -EIO; 1517 goto out_free; 1518 } 1519 1520 if (netif_msg_ifup(port)) 1521 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n", 1522 init_attr->qp_nr, 1523 init_attr->act_nr_send_wqes, 1524 init_attr->act_nr_rwqes_rq1, 1525 init_attr->act_nr_rwqes_rq2, 1526 init_attr->act_nr_rwqes_rq3); 1527 1528 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1529 1530 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1531 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1532 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1533 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1534 if (ret) 1535 goto out_free; 1536 1537 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1538 if (ehea_gen_smrs(pr) != 0) { 1539 ret = -EIO; 1540 goto out_free; 1541 } 1542 1543 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1544 1545 kfree(init_attr); 1546 1547 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); 1548 1549 ret = 0; 1550 goto out; 1551 1552 out_free: 1553 kfree(init_attr); 1554 vfree(pr->sq_skba.arr); 1555 vfree(pr->rq1_skba.arr); 1556 vfree(pr->rq2_skba.arr); 1557 vfree(pr->rq3_skba.arr); 1558 ehea_destroy_qp(pr->qp); 1559 ehea_destroy_cq(pr->send_cq); 1560 ehea_destroy_cq(pr->recv_cq); 1561 ehea_destroy_eq(pr->eq); 1562 out: 1563 return ret; 1564 } 1565 1566 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1567 { 1568 int ret, i; 1569 1570 if (pr->qp) 1571 netif_napi_del(&pr->napi); 1572 1573 ret = ehea_destroy_qp(pr->qp); 1574 1575 if (!ret) { 1576 ehea_destroy_cq(pr->send_cq); 1577 ehea_destroy_cq(pr->recv_cq); 1578 ehea_destroy_eq(pr->eq); 1579 1580 for (i = 0; i < pr->rq1_skba.len; i++) 1581 dev_kfree_skb(pr->rq1_skba.arr[i]); 1582 1583 for (i = 0; i < pr->rq2_skba.len; i++) 1584 dev_kfree_skb(pr->rq2_skba.arr[i]); 1585 1586 for (i = 0; i < pr->rq3_skba.len; i++) 1587 dev_kfree_skb(pr->rq3_skba.arr[i]); 1588 1589 for (i = 0; i < pr->sq_skba.len; i++) 1590 dev_kfree_skb(pr->sq_skba.arr[i]); 1591 1592 vfree(pr->rq1_skba.arr); 1593 vfree(pr->rq2_skba.arr); 1594 vfree(pr->rq3_skba.arr); 1595 vfree(pr->sq_skba.arr); 1596 ret = ehea_rem_smrs(pr); 1597 } 1598 return ret; 1599 } 1600 1601 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1602 u32 lkey) 1603 { 1604 int skb_data_size = skb_headlen(skb); 1605 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1606 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1607 unsigned int immediate_len = SWQE2_MAX_IMM; 1608 1609 swqe->descriptors = 0; 1610 1611 if (skb_is_gso(skb)) { 1612 swqe->tx_control |= EHEA_SWQE_TSO; 1613 swqe->mss = skb_shinfo(skb)->gso_size; 1614 /* 1615 * For TSO packets we only copy the headers into the 1616 * immediate area. 1617 */ 1618 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb); 1619 } 1620 1621 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1622 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1623 swqe->immediate_data_length = immediate_len; 1624 1625 if (skb_data_size > immediate_len) { 1626 sg1entry->l_key = lkey; 1627 sg1entry->len = skb_data_size - immediate_len; 1628 sg1entry->vaddr = 1629 ehea_map_vaddr(skb->data + immediate_len); 1630 swqe->descriptors++; 1631 } 1632 } else { 1633 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1634 swqe->immediate_data_length = skb_data_size; 1635 } 1636 } 1637 1638 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1639 struct ehea_swqe *swqe, u32 lkey) 1640 { 1641 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1642 skb_frag_t *frag; 1643 int nfrags, sg1entry_contains_frag_data, i; 1644 1645 nfrags = skb_shinfo(skb)->nr_frags; 1646 sg1entry = &swqe->u.immdata_desc.sg_entry; 1647 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1648 sg1entry_contains_frag_data = 0; 1649 1650 write_swqe2_immediate(skb, swqe, lkey); 1651 1652 /* write descriptors */ 1653 if (nfrags > 0) { 1654 if (swqe->descriptors == 0) { 1655 /* sg1entry not yet used */ 1656 frag = &skb_shinfo(skb)->frags[0]; 1657 1658 /* copy sg1entry data */ 1659 sg1entry->l_key = lkey; 1660 sg1entry->len = skb_frag_size(frag); 1661 sg1entry->vaddr = 1662 ehea_map_vaddr(skb_frag_address(frag)); 1663 swqe->descriptors++; 1664 sg1entry_contains_frag_data = 1; 1665 } 1666 1667 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1668 1669 frag = &skb_shinfo(skb)->frags[i]; 1670 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1671 1672 sgentry->l_key = lkey; 1673 sgentry->len = skb_frag_size(frag); 1674 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1675 swqe->descriptors++; 1676 } 1677 } 1678 } 1679 1680 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1681 { 1682 int ret = 0; 1683 u64 hret; 1684 u8 reg_type; 1685 1686 /* De/Register untagged packets */ 1687 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1688 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1689 port->logical_port_id, 1690 reg_type, port->mac_addr, 0, hcallid); 1691 if (hret != H_SUCCESS) { 1692 pr_err("%sregistering bc address failed (tagged)\n", 1693 hcallid == H_REG_BCMC ? "" : "de"); 1694 ret = -EIO; 1695 goto out_herr; 1696 } 1697 1698 /* De/Register VLAN packets */ 1699 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1700 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1701 port->logical_port_id, 1702 reg_type, port->mac_addr, 0, hcallid); 1703 if (hret != H_SUCCESS) { 1704 pr_err("%sregistering bc address failed (vlan)\n", 1705 hcallid == H_REG_BCMC ? "" : "de"); 1706 ret = -EIO; 1707 } 1708 out_herr: 1709 return ret; 1710 } 1711 1712 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1713 { 1714 struct ehea_port *port = netdev_priv(dev); 1715 struct sockaddr *mac_addr = sa; 1716 struct hcp_ehea_port_cb0 *cb0; 1717 int ret; 1718 u64 hret; 1719 1720 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1721 ret = -EADDRNOTAVAIL; 1722 goto out; 1723 } 1724 1725 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1726 if (!cb0) { 1727 pr_err("no mem for cb0\n"); 1728 ret = -ENOMEM; 1729 goto out; 1730 } 1731 1732 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1733 1734 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1735 1736 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1737 port->logical_port_id, H_PORT_CB0, 1738 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1739 if (hret != H_SUCCESS) { 1740 ret = -EIO; 1741 goto out_free; 1742 } 1743 1744 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); 1745 1746 /* Deregister old MAC in pHYP */ 1747 if (port->state == EHEA_PORT_UP) { 1748 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1749 if (ret) 1750 goto out_upregs; 1751 } 1752 1753 port->mac_addr = cb0->port_mac_addr << 16; 1754 1755 /* Register new MAC in pHYP */ 1756 if (port->state == EHEA_PORT_UP) { 1757 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1758 if (ret) 1759 goto out_upregs; 1760 } 1761 1762 ret = 0; 1763 1764 out_upregs: 1765 ehea_update_bcmc_registrations(); 1766 out_free: 1767 free_page((unsigned long)cb0); 1768 out: 1769 return ret; 1770 } 1771 1772 static void ehea_promiscuous_error(u64 hret, int enable) 1773 { 1774 if (hret == H_AUTHORITY) 1775 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1776 enable == 1 ? "en" : "dis"); 1777 else 1778 pr_err("failed %sabling promiscuous mode\n", 1779 enable == 1 ? "en" : "dis"); 1780 } 1781 1782 static void ehea_promiscuous(struct net_device *dev, int enable) 1783 { 1784 struct ehea_port *port = netdev_priv(dev); 1785 struct hcp_ehea_port_cb7 *cb7; 1786 u64 hret; 1787 1788 if (enable == port->promisc) 1789 return; 1790 1791 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1792 if (!cb7) { 1793 pr_err("no mem for cb7\n"); 1794 goto out; 1795 } 1796 1797 /* Modify Pxs_DUCQPN in CB7 */ 1798 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1799 1800 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1801 port->logical_port_id, 1802 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1803 if (hret) { 1804 ehea_promiscuous_error(hret, enable); 1805 goto out; 1806 } 1807 1808 port->promisc = enable; 1809 out: 1810 free_page((unsigned long)cb7); 1811 } 1812 1813 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1814 u32 hcallid) 1815 { 1816 u64 hret; 1817 u8 reg_type; 1818 1819 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; 1820 if (mc_mac_addr == 0) 1821 reg_type |= EHEA_BCMC_SCOPE_ALL; 1822 1823 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1824 port->logical_port_id, 1825 reg_type, mc_mac_addr, 0, hcallid); 1826 if (hret) 1827 goto out; 1828 1829 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL; 1830 if (mc_mac_addr == 0) 1831 reg_type |= EHEA_BCMC_SCOPE_ALL; 1832 1833 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1834 port->logical_port_id, 1835 reg_type, mc_mac_addr, 0, hcallid); 1836 out: 1837 return hret; 1838 } 1839 1840 static int ehea_drop_multicast_list(struct net_device *dev) 1841 { 1842 struct ehea_port *port = netdev_priv(dev); 1843 struct ehea_mc_list *mc_entry = port->mc_list; 1844 struct list_head *pos; 1845 struct list_head *temp; 1846 int ret = 0; 1847 u64 hret; 1848 1849 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1850 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1851 1852 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1853 H_DEREG_BCMC); 1854 if (hret) { 1855 pr_err("failed deregistering mcast MAC\n"); 1856 ret = -EIO; 1857 } 1858 1859 list_del(pos); 1860 kfree(mc_entry); 1861 } 1862 return ret; 1863 } 1864 1865 static void ehea_allmulti(struct net_device *dev, int enable) 1866 { 1867 struct ehea_port *port = netdev_priv(dev); 1868 u64 hret; 1869 1870 if (!port->allmulti) { 1871 if (enable) { 1872 /* Enable ALLMULTI */ 1873 ehea_drop_multicast_list(dev); 1874 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1875 if (!hret) 1876 port->allmulti = 1; 1877 else 1878 netdev_err(dev, 1879 "failed enabling IFF_ALLMULTI\n"); 1880 } 1881 } else { 1882 if (!enable) { 1883 /* Disable ALLMULTI */ 1884 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1885 if (!hret) 1886 port->allmulti = 0; 1887 else 1888 netdev_err(dev, 1889 "failed disabling IFF_ALLMULTI\n"); 1890 } 1891 } 1892 } 1893 1894 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1895 { 1896 struct ehea_mc_list *ehea_mcl_entry; 1897 u64 hret; 1898 1899 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1900 if (!ehea_mcl_entry) 1901 return; 1902 1903 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1904 1905 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1906 1907 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1908 H_REG_BCMC); 1909 if (!hret) 1910 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1911 else { 1912 pr_err("failed registering mcast MAC\n"); 1913 kfree(ehea_mcl_entry); 1914 } 1915 } 1916 1917 static void ehea_set_multicast_list(struct net_device *dev) 1918 { 1919 struct ehea_port *port = netdev_priv(dev); 1920 struct netdev_hw_addr *ha; 1921 int ret; 1922 1923 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC)); 1924 1925 if (dev->flags & IFF_ALLMULTI) { 1926 ehea_allmulti(dev, 1); 1927 goto out; 1928 } 1929 ehea_allmulti(dev, 0); 1930 1931 if (!netdev_mc_empty(dev)) { 1932 ret = ehea_drop_multicast_list(dev); 1933 if (ret) { 1934 /* Dropping the current multicast list failed. 1935 * Enabling ALL_MULTI is the best we can do. 1936 */ 1937 ehea_allmulti(dev, 1); 1938 } 1939 1940 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1941 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1942 port->adapter->max_mc_mac); 1943 goto out; 1944 } 1945 1946 netdev_for_each_mc_addr(ha, dev) 1947 ehea_add_multicast_entry(port, ha->addr); 1948 1949 } 1950 out: 1951 ehea_update_bcmc_registrations(); 1952 } 1953 1954 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1955 { 1956 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1957 1958 if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 1959 return; 1960 1961 if (skb->ip_summed == CHECKSUM_PARTIAL) 1962 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 1963 1964 swqe->ip_start = skb_network_offset(skb); 1965 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 1966 1967 switch (ip_hdr(skb)->protocol) { 1968 case IPPROTO_UDP: 1969 if (skb->ip_summed == CHECKSUM_PARTIAL) 1970 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1971 1972 swqe->tcp_offset = swqe->ip_end + 1 + 1973 offsetof(struct udphdr, check); 1974 break; 1975 1976 case IPPROTO_TCP: 1977 if (skb->ip_summed == CHECKSUM_PARTIAL) 1978 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1979 1980 swqe->tcp_offset = swqe->ip_end + 1 + 1981 offsetof(struct tcphdr, check); 1982 break; 1983 } 1984 } 1985 1986 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 1987 struct ehea_swqe *swqe, u32 lkey) 1988 { 1989 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 1990 1991 xmit_common(skb, swqe); 1992 1993 write_swqe2_data(skb, dev, swqe, lkey); 1994 } 1995 1996 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 1997 struct ehea_swqe *swqe) 1998 { 1999 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2000 2001 xmit_common(skb, swqe); 2002 2003 if (!skb->data_len) 2004 skb_copy_from_linear_data(skb, imm_data, skb->len); 2005 else 2006 skb_copy_bits(skb, 0, imm_data, skb->len); 2007 2008 swqe->immediate_data_length = skb->len; 2009 dev_consume_skb_any(skb); 2010 } 2011 2012 static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2013 { 2014 struct ehea_port *port = netdev_priv(dev); 2015 struct ehea_swqe *swqe; 2016 u32 lkey; 2017 int swqe_index; 2018 struct ehea_port_res *pr; 2019 struct netdev_queue *txq; 2020 2021 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2022 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2023 2024 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2025 memset(swqe, 0, SWQE_HEADER_SIZE); 2026 atomic_dec(&pr->swqe_avail); 2027 2028 if (skb_vlan_tag_present(skb)) { 2029 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2030 swqe->vlan_tag = skb_vlan_tag_get(skb); 2031 } 2032 2033 pr->tx_packets++; 2034 pr->tx_bytes += skb->len; 2035 2036 if (skb->len <= SWQE3_MAX_IMM) { 2037 u32 sig_iv = port->sig_comp_iv; 2038 u32 swqe_num = pr->swqe_id_counter; 2039 ehea_xmit3(skb, dev, swqe); 2040 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2041 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2042 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2043 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2044 sig_iv); 2045 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2046 pr->swqe_ll_count = 0; 2047 } else 2048 pr->swqe_ll_count += 1; 2049 } else { 2050 swqe->wr_id = 2051 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2052 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2053 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2054 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2055 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2056 2057 pr->sq_skba.index++; 2058 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2059 2060 lkey = pr->send_mr.lkey; 2061 ehea_xmit2(skb, dev, swqe, lkey); 2062 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2063 } 2064 pr->swqe_id_counter += 1; 2065 2066 netif_info(port, tx_queued, dev, 2067 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2068 if (netif_msg_tx_queued(port)) 2069 ehea_dump(swqe, 512, "swqe"); 2070 2071 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2072 netif_tx_stop_queue(txq); 2073 swqe->tx_control |= EHEA_SWQE_PURGE; 2074 } 2075 2076 ehea_post_swqe(pr->qp, swqe); 2077 2078 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2079 pr->p_stats.queue_stopped++; 2080 netif_tx_stop_queue(txq); 2081 } 2082 2083 return NETDEV_TX_OK; 2084 } 2085 2086 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2087 { 2088 struct ehea_port *port = netdev_priv(dev); 2089 struct ehea_adapter *adapter = port->adapter; 2090 struct hcp_ehea_port_cb1 *cb1; 2091 int index; 2092 u64 hret; 2093 int err = 0; 2094 2095 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2096 if (!cb1) { 2097 pr_err("no mem for cb1\n"); 2098 err = -ENOMEM; 2099 goto out; 2100 } 2101 2102 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2103 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2104 if (hret != H_SUCCESS) { 2105 pr_err("query_ehea_port failed\n"); 2106 err = -EINVAL; 2107 goto out; 2108 } 2109 2110 index = (vid / 64); 2111 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2112 2113 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2114 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2115 if (hret != H_SUCCESS) { 2116 pr_err("modify_ehea_port failed\n"); 2117 err = -EINVAL; 2118 } 2119 out: 2120 free_page((unsigned long)cb1); 2121 return err; 2122 } 2123 2124 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2125 { 2126 struct ehea_port *port = netdev_priv(dev); 2127 struct ehea_adapter *adapter = port->adapter; 2128 struct hcp_ehea_port_cb1 *cb1; 2129 int index; 2130 u64 hret; 2131 int err = 0; 2132 2133 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2134 if (!cb1) { 2135 pr_err("no mem for cb1\n"); 2136 err = -ENOMEM; 2137 goto out; 2138 } 2139 2140 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2141 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2142 if (hret != H_SUCCESS) { 2143 pr_err("query_ehea_port failed\n"); 2144 err = -EINVAL; 2145 goto out; 2146 } 2147 2148 index = (vid / 64); 2149 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2150 2151 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2152 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2153 if (hret != H_SUCCESS) { 2154 pr_err("modify_ehea_port failed\n"); 2155 err = -EINVAL; 2156 } 2157 out: 2158 free_page((unsigned long)cb1); 2159 return err; 2160 } 2161 2162 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2163 { 2164 int ret = -EIO; 2165 u64 hret; 2166 u16 dummy16 = 0; 2167 u64 dummy64 = 0; 2168 struct hcp_modify_qp_cb0 *cb0; 2169 2170 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2171 if (!cb0) { 2172 ret = -ENOMEM; 2173 goto out; 2174 } 2175 2176 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2177 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2178 if (hret != H_SUCCESS) { 2179 pr_err("query_ehea_qp failed (1)\n"); 2180 goto out; 2181 } 2182 2183 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2184 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2185 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2186 &dummy64, &dummy64, &dummy16, &dummy16); 2187 if (hret != H_SUCCESS) { 2188 pr_err("modify_ehea_qp failed (1)\n"); 2189 goto out; 2190 } 2191 2192 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2193 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2194 if (hret != H_SUCCESS) { 2195 pr_err("query_ehea_qp failed (2)\n"); 2196 goto out; 2197 } 2198 2199 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2200 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2201 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2202 &dummy64, &dummy64, &dummy16, &dummy16); 2203 if (hret != H_SUCCESS) { 2204 pr_err("modify_ehea_qp failed (2)\n"); 2205 goto out; 2206 } 2207 2208 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2209 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2210 if (hret != H_SUCCESS) { 2211 pr_err("query_ehea_qp failed (3)\n"); 2212 goto out; 2213 } 2214 2215 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2216 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2217 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2218 &dummy64, &dummy64, &dummy16, &dummy16); 2219 if (hret != H_SUCCESS) { 2220 pr_err("modify_ehea_qp failed (3)\n"); 2221 goto out; 2222 } 2223 2224 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2225 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2226 if (hret != H_SUCCESS) { 2227 pr_err("query_ehea_qp failed (4)\n"); 2228 goto out; 2229 } 2230 2231 ret = 0; 2232 out: 2233 free_page((unsigned long)cb0); 2234 return ret; 2235 } 2236 2237 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2238 { 2239 int ret, i; 2240 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2241 enum ehea_eq_type eq_type = EHEA_EQ; 2242 2243 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2244 EHEA_MAX_ENTRIES_EQ, 1); 2245 if (!port->qp_eq) { 2246 ret = -EINVAL; 2247 pr_err("ehea_create_eq failed (qp_eq)\n"); 2248 goto out_kill_eq; 2249 } 2250 2251 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2252 pr_cfg.max_entries_scq = sq_entries * 2; 2253 pr_cfg.max_entries_sq = sq_entries; 2254 pr_cfg.max_entries_rq1 = rq1_entries; 2255 pr_cfg.max_entries_rq2 = rq2_entries; 2256 pr_cfg.max_entries_rq3 = rq3_entries; 2257 2258 pr_cfg_small_rx.max_entries_rcq = 1; 2259 pr_cfg_small_rx.max_entries_scq = sq_entries; 2260 pr_cfg_small_rx.max_entries_sq = sq_entries; 2261 pr_cfg_small_rx.max_entries_rq1 = 1; 2262 pr_cfg_small_rx.max_entries_rq2 = 1; 2263 pr_cfg_small_rx.max_entries_rq3 = 1; 2264 2265 for (i = 0; i < def_qps; i++) { 2266 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2267 if (ret) 2268 goto out_clean_pr; 2269 } 2270 for (i = def_qps; i < def_qps; i++) { 2271 ret = ehea_init_port_res(port, &port->port_res[i], 2272 &pr_cfg_small_rx, i); 2273 if (ret) 2274 goto out_clean_pr; 2275 } 2276 2277 return 0; 2278 2279 out_clean_pr: 2280 while (--i >= 0) 2281 ehea_clean_portres(port, &port->port_res[i]); 2282 2283 out_kill_eq: 2284 ehea_destroy_eq(port->qp_eq); 2285 return ret; 2286 } 2287 2288 static int ehea_clean_all_portres(struct ehea_port *port) 2289 { 2290 int ret = 0; 2291 int i; 2292 2293 for (i = 0; i < port->num_def_qps; i++) 2294 ret |= ehea_clean_portres(port, &port->port_res[i]); 2295 2296 ret |= ehea_destroy_eq(port->qp_eq); 2297 2298 return ret; 2299 } 2300 2301 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2302 { 2303 if (adapter->active_ports) 2304 return; 2305 2306 ehea_rem_mr(&adapter->mr); 2307 } 2308 2309 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2310 { 2311 if (adapter->active_ports) 2312 return 0; 2313 2314 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2315 } 2316 2317 static int ehea_up(struct net_device *dev) 2318 { 2319 int ret, i; 2320 struct ehea_port *port = netdev_priv(dev); 2321 2322 if (port->state == EHEA_PORT_UP) 2323 return 0; 2324 2325 ret = ehea_port_res_setup(port, port->num_def_qps); 2326 if (ret) { 2327 netdev_err(dev, "port_res_failed\n"); 2328 goto out; 2329 } 2330 2331 /* Set default QP for this port */ 2332 ret = ehea_configure_port(port); 2333 if (ret) { 2334 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2335 goto out_clean_pr; 2336 } 2337 2338 ret = ehea_reg_interrupts(dev); 2339 if (ret) { 2340 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2341 goto out_clean_pr; 2342 } 2343 2344 for (i = 0; i < port->num_def_qps; i++) { 2345 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2346 if (ret) { 2347 netdev_err(dev, "activate_qp failed\n"); 2348 goto out_free_irqs; 2349 } 2350 } 2351 2352 for (i = 0; i < port->num_def_qps; i++) { 2353 ret = ehea_fill_port_res(&port->port_res[i]); 2354 if (ret) { 2355 netdev_err(dev, "out_free_irqs\n"); 2356 goto out_free_irqs; 2357 } 2358 } 2359 2360 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2361 if (ret) { 2362 ret = -EIO; 2363 goto out_free_irqs; 2364 } 2365 2366 port->state = EHEA_PORT_UP; 2367 2368 ret = 0; 2369 goto out; 2370 2371 out_free_irqs: 2372 ehea_free_interrupts(dev); 2373 2374 out_clean_pr: 2375 ehea_clean_all_portres(port); 2376 out: 2377 if (ret) 2378 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2379 2380 ehea_update_bcmc_registrations(); 2381 ehea_update_firmware_handles(); 2382 2383 return ret; 2384 } 2385 2386 static void port_napi_disable(struct ehea_port *port) 2387 { 2388 int i; 2389 2390 for (i = 0; i < port->num_def_qps; i++) 2391 napi_disable(&port->port_res[i].napi); 2392 } 2393 2394 static void port_napi_enable(struct ehea_port *port) 2395 { 2396 int i; 2397 2398 for (i = 0; i < port->num_def_qps; i++) 2399 napi_enable(&port->port_res[i].napi); 2400 } 2401 2402 static int ehea_open(struct net_device *dev) 2403 { 2404 int ret; 2405 struct ehea_port *port = netdev_priv(dev); 2406 2407 mutex_lock(&port->port_lock); 2408 2409 netif_info(port, ifup, dev, "enabling port\n"); 2410 2411 netif_carrier_off(dev); 2412 2413 ret = ehea_up(dev); 2414 if (!ret) { 2415 port_napi_enable(port); 2416 netif_tx_start_all_queues(dev); 2417 } 2418 2419 mutex_unlock(&port->port_lock); 2420 schedule_delayed_work(&port->stats_work, 2421 round_jiffies_relative(msecs_to_jiffies(1000))); 2422 2423 return ret; 2424 } 2425 2426 static int ehea_down(struct net_device *dev) 2427 { 2428 int ret; 2429 struct ehea_port *port = netdev_priv(dev); 2430 2431 if (port->state == EHEA_PORT_DOWN) 2432 return 0; 2433 2434 ehea_drop_multicast_list(dev); 2435 ehea_allmulti(dev, 0); 2436 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2437 2438 ehea_free_interrupts(dev); 2439 2440 port->state = EHEA_PORT_DOWN; 2441 2442 ehea_update_bcmc_registrations(); 2443 2444 ret = ehea_clean_all_portres(port); 2445 if (ret) 2446 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2447 2448 ehea_update_firmware_handles(); 2449 2450 return ret; 2451 } 2452 2453 static int ehea_stop(struct net_device *dev) 2454 { 2455 int ret; 2456 struct ehea_port *port = netdev_priv(dev); 2457 2458 netif_info(port, ifdown, dev, "disabling port\n"); 2459 2460 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2461 cancel_work_sync(&port->reset_task); 2462 cancel_delayed_work_sync(&port->stats_work); 2463 mutex_lock(&port->port_lock); 2464 netif_tx_stop_all_queues(dev); 2465 port_napi_disable(port); 2466 ret = ehea_down(dev); 2467 mutex_unlock(&port->port_lock); 2468 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2469 return ret; 2470 } 2471 2472 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2473 { 2474 struct ehea_qp qp = *orig_qp; 2475 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2476 struct ehea_swqe *swqe; 2477 int wqe_index; 2478 int i; 2479 2480 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2481 swqe = ehea_get_swqe(&qp, &wqe_index); 2482 swqe->tx_control |= EHEA_SWQE_PURGE; 2483 } 2484 } 2485 2486 static void ehea_flush_sq(struct ehea_port *port) 2487 { 2488 int i; 2489 2490 for (i = 0; i < port->num_def_qps; i++) { 2491 struct ehea_port_res *pr = &port->port_res[i]; 2492 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2493 int ret; 2494 2495 ret = wait_event_timeout(port->swqe_avail_wq, 2496 atomic_read(&pr->swqe_avail) >= swqe_max, 2497 msecs_to_jiffies(100)); 2498 2499 if (!ret) { 2500 pr_err("WARNING: sq not flushed completely\n"); 2501 break; 2502 } 2503 } 2504 } 2505 2506 static int ehea_stop_qps(struct net_device *dev) 2507 { 2508 struct ehea_port *port = netdev_priv(dev); 2509 struct ehea_adapter *adapter = port->adapter; 2510 struct hcp_modify_qp_cb0 *cb0; 2511 int ret = -EIO; 2512 int dret; 2513 int i; 2514 u64 hret; 2515 u64 dummy64 = 0; 2516 u16 dummy16 = 0; 2517 2518 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2519 if (!cb0) { 2520 ret = -ENOMEM; 2521 goto out; 2522 } 2523 2524 for (i = 0; i < (port->num_def_qps); i++) { 2525 struct ehea_port_res *pr = &port->port_res[i]; 2526 struct ehea_qp *qp = pr->qp; 2527 2528 /* Purge send queue */ 2529 ehea_purge_sq(qp); 2530 2531 /* Disable queue pair */ 2532 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2533 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2534 cb0); 2535 if (hret != H_SUCCESS) { 2536 pr_err("query_ehea_qp failed (1)\n"); 2537 goto out; 2538 } 2539 2540 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2541 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2542 2543 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2544 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2545 1), cb0, &dummy64, 2546 &dummy64, &dummy16, &dummy16); 2547 if (hret != H_SUCCESS) { 2548 pr_err("modify_ehea_qp failed (1)\n"); 2549 goto out; 2550 } 2551 2552 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2553 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2554 cb0); 2555 if (hret != H_SUCCESS) { 2556 pr_err("query_ehea_qp failed (2)\n"); 2557 goto out; 2558 } 2559 2560 /* deregister shared memory regions */ 2561 dret = ehea_rem_smrs(pr); 2562 if (dret) { 2563 pr_err("unreg shared memory region failed\n"); 2564 goto out; 2565 } 2566 } 2567 2568 ret = 0; 2569 out: 2570 free_page((unsigned long)cb0); 2571 2572 return ret; 2573 } 2574 2575 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2576 { 2577 struct ehea_qp qp = *orig_qp; 2578 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2579 struct ehea_rwqe *rwqe; 2580 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2581 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2582 struct sk_buff *skb; 2583 u32 lkey = pr->recv_mr.lkey; 2584 2585 2586 int i; 2587 int index; 2588 2589 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2590 rwqe = ehea_get_next_rwqe(&qp, 2); 2591 rwqe->sg_list[0].l_key = lkey; 2592 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2593 skb = skba_rq2[index]; 2594 if (skb) 2595 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2596 } 2597 2598 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2599 rwqe = ehea_get_next_rwqe(&qp, 3); 2600 rwqe->sg_list[0].l_key = lkey; 2601 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2602 skb = skba_rq3[index]; 2603 if (skb) 2604 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2605 } 2606 } 2607 2608 static int ehea_restart_qps(struct net_device *dev) 2609 { 2610 struct ehea_port *port = netdev_priv(dev); 2611 struct ehea_adapter *adapter = port->adapter; 2612 int ret = 0; 2613 int i; 2614 2615 struct hcp_modify_qp_cb0 *cb0; 2616 u64 hret; 2617 u64 dummy64 = 0; 2618 u16 dummy16 = 0; 2619 2620 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2621 if (!cb0) 2622 return -ENOMEM; 2623 2624 for (i = 0; i < (port->num_def_qps); i++) { 2625 struct ehea_port_res *pr = &port->port_res[i]; 2626 struct ehea_qp *qp = pr->qp; 2627 2628 ret = ehea_gen_smrs(pr); 2629 if (ret) { 2630 netdev_err(dev, "creation of shared memory regions failed\n"); 2631 goto out; 2632 } 2633 2634 ehea_update_rqs(qp, pr); 2635 2636 /* Enable queue pair */ 2637 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2638 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2639 cb0); 2640 if (hret != H_SUCCESS) { 2641 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2642 ret = -EFAULT; 2643 goto out; 2644 } 2645 2646 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2647 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2648 2649 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2650 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2651 1), cb0, &dummy64, 2652 &dummy64, &dummy16, &dummy16); 2653 if (hret != H_SUCCESS) { 2654 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2655 ret = -EFAULT; 2656 goto out; 2657 } 2658 2659 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2660 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2661 cb0); 2662 if (hret != H_SUCCESS) { 2663 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2664 ret = -EFAULT; 2665 goto out; 2666 } 2667 2668 /* refill entire queue */ 2669 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2670 ehea_refill_rq2(pr, 0); 2671 ehea_refill_rq3(pr, 0); 2672 } 2673 out: 2674 free_page((unsigned long)cb0); 2675 2676 return ret; 2677 } 2678 2679 static void ehea_reset_port(struct work_struct *work) 2680 { 2681 int ret; 2682 struct ehea_port *port = 2683 container_of(work, struct ehea_port, reset_task); 2684 struct net_device *dev = port->netdev; 2685 2686 mutex_lock(&dlpar_mem_lock); 2687 port->resets++; 2688 mutex_lock(&port->port_lock); 2689 netif_tx_disable(dev); 2690 2691 port_napi_disable(port); 2692 2693 ehea_down(dev); 2694 2695 ret = ehea_up(dev); 2696 if (ret) 2697 goto out; 2698 2699 ehea_set_multicast_list(dev); 2700 2701 netif_info(port, timer, dev, "reset successful\n"); 2702 2703 port_napi_enable(port); 2704 2705 netif_tx_wake_all_queues(dev); 2706 out: 2707 mutex_unlock(&port->port_lock); 2708 mutex_unlock(&dlpar_mem_lock); 2709 } 2710 2711 static void ehea_rereg_mrs(void) 2712 { 2713 int ret, i; 2714 struct ehea_adapter *adapter; 2715 2716 pr_info("LPAR memory changed - re-initializing driver\n"); 2717 2718 list_for_each_entry(adapter, &adapter_list, list) 2719 if (adapter->active_ports) { 2720 /* Shutdown all ports */ 2721 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2722 struct ehea_port *port = adapter->port[i]; 2723 struct net_device *dev; 2724 2725 if (!port) 2726 continue; 2727 2728 dev = port->netdev; 2729 2730 if (dev->flags & IFF_UP) { 2731 mutex_lock(&port->port_lock); 2732 netif_tx_disable(dev); 2733 ehea_flush_sq(port); 2734 ret = ehea_stop_qps(dev); 2735 if (ret) { 2736 mutex_unlock(&port->port_lock); 2737 goto out; 2738 } 2739 port_napi_disable(port); 2740 mutex_unlock(&port->port_lock); 2741 } 2742 reset_sq_restart_flag(port); 2743 } 2744 2745 /* Unregister old memory region */ 2746 ret = ehea_rem_mr(&adapter->mr); 2747 if (ret) { 2748 pr_err("unregister MR failed - driver inoperable!\n"); 2749 goto out; 2750 } 2751 } 2752 2753 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2754 2755 list_for_each_entry(adapter, &adapter_list, list) 2756 if (adapter->active_ports) { 2757 /* Register new memory region */ 2758 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2759 if (ret) { 2760 pr_err("register MR failed - driver inoperable!\n"); 2761 goto out; 2762 } 2763 2764 /* Restart all ports */ 2765 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2766 struct ehea_port *port = adapter->port[i]; 2767 2768 if (port) { 2769 struct net_device *dev = port->netdev; 2770 2771 if (dev->flags & IFF_UP) { 2772 mutex_lock(&port->port_lock); 2773 ret = ehea_restart_qps(dev); 2774 if (!ret) { 2775 check_sqs(port); 2776 port_napi_enable(port); 2777 netif_tx_wake_all_queues(dev); 2778 } else { 2779 netdev_err(dev, "Unable to restart QPS\n"); 2780 } 2781 mutex_unlock(&port->port_lock); 2782 } 2783 } 2784 } 2785 } 2786 pr_info("re-initializing driver complete\n"); 2787 out: 2788 return; 2789 } 2790 2791 static void ehea_tx_watchdog(struct net_device *dev, unsigned int txqueue) 2792 { 2793 struct ehea_port *port = netdev_priv(dev); 2794 2795 if (netif_carrier_ok(dev) && 2796 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2797 ehea_schedule_port_reset(port); 2798 } 2799 2800 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2801 { 2802 struct hcp_query_ehea *cb; 2803 u64 hret; 2804 int ret; 2805 2806 cb = (void *)get_zeroed_page(GFP_KERNEL); 2807 if (!cb) { 2808 ret = -ENOMEM; 2809 goto out; 2810 } 2811 2812 hret = ehea_h_query_ehea(adapter->handle, cb); 2813 2814 if (hret != H_SUCCESS) { 2815 ret = -EIO; 2816 goto out_herr; 2817 } 2818 2819 adapter->max_mc_mac = cb->max_mc_mac - 1; 2820 ret = 0; 2821 2822 out_herr: 2823 free_page((unsigned long)cb); 2824 out: 2825 return ret; 2826 } 2827 2828 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2829 { 2830 struct hcp_ehea_port_cb4 *cb4; 2831 u64 hret; 2832 int ret = 0; 2833 2834 *jumbo = 0; 2835 2836 /* (Try to) enable *jumbo frames */ 2837 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2838 if (!cb4) { 2839 pr_err("no mem for cb4\n"); 2840 ret = -ENOMEM; 2841 goto out; 2842 } else { 2843 hret = ehea_h_query_ehea_port(port->adapter->handle, 2844 port->logical_port_id, 2845 H_PORT_CB4, 2846 H_PORT_CB4_JUMBO, cb4); 2847 if (hret == H_SUCCESS) { 2848 if (cb4->jumbo_frame) 2849 *jumbo = 1; 2850 else { 2851 cb4->jumbo_frame = 1; 2852 hret = ehea_h_modify_ehea_port(port->adapter-> 2853 handle, 2854 port-> 2855 logical_port_id, 2856 H_PORT_CB4, 2857 H_PORT_CB4_JUMBO, 2858 cb4); 2859 if (hret == H_SUCCESS) 2860 *jumbo = 1; 2861 } 2862 } else 2863 ret = -EINVAL; 2864 2865 free_page((unsigned long)cb4); 2866 } 2867 out: 2868 return ret; 2869 } 2870 2871 static ssize_t log_port_id_show(struct device *dev, 2872 struct device_attribute *attr, char *buf) 2873 { 2874 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2875 return sprintf(buf, "%d", port->logical_port_id); 2876 } 2877 2878 static DEVICE_ATTR_RO(log_port_id); 2879 2880 static void logical_port_release(struct device *dev) 2881 { 2882 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2883 of_node_put(port->ofdev.dev.of_node); 2884 } 2885 2886 static struct device *ehea_register_port(struct ehea_port *port, 2887 struct device_node *dn) 2888 { 2889 int ret; 2890 2891 port->ofdev.dev.of_node = of_node_get(dn); 2892 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2893 port->ofdev.dev.bus = &ibmebus_bus_type; 2894 2895 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2896 port->ofdev.dev.release = logical_port_release; 2897 2898 ret = of_device_register(&port->ofdev); 2899 if (ret) { 2900 pr_err("failed to register device. ret=%d\n", ret); 2901 goto out; 2902 } 2903 2904 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2905 if (ret) { 2906 pr_err("failed to register attributes, ret=%d\n", ret); 2907 goto out_unreg_of_dev; 2908 } 2909 2910 return &port->ofdev.dev; 2911 2912 out_unreg_of_dev: 2913 of_device_unregister(&port->ofdev); 2914 out: 2915 return NULL; 2916 } 2917 2918 static void ehea_unregister_port(struct ehea_port *port) 2919 { 2920 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2921 of_device_unregister(&port->ofdev); 2922 } 2923 2924 static const struct net_device_ops ehea_netdev_ops = { 2925 .ndo_open = ehea_open, 2926 .ndo_stop = ehea_stop, 2927 .ndo_start_xmit = ehea_start_xmit, 2928 .ndo_get_stats64 = ehea_get_stats64, 2929 .ndo_set_mac_address = ehea_set_mac_addr, 2930 .ndo_validate_addr = eth_validate_addr, 2931 .ndo_set_rx_mode = ehea_set_multicast_list, 2932 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2933 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2934 .ndo_tx_timeout = ehea_tx_watchdog, 2935 }; 2936 2937 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2938 u32 logical_port_id, 2939 struct device_node *dn) 2940 { 2941 int ret; 2942 struct net_device *dev; 2943 struct ehea_port *port; 2944 struct device *port_dev; 2945 int jumbo; 2946 2947 /* allocate memory for the port structures */ 2948 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2949 2950 if (!dev) { 2951 ret = -ENOMEM; 2952 goto out_err; 2953 } 2954 2955 port = netdev_priv(dev); 2956 2957 mutex_init(&port->port_lock); 2958 port->state = EHEA_PORT_DOWN; 2959 port->sig_comp_iv = sq_entries / 10; 2960 2961 port->adapter = adapter; 2962 port->netdev = dev; 2963 port->logical_port_id = logical_port_id; 2964 2965 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 2966 2967 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 2968 if (!port->mc_list) { 2969 ret = -ENOMEM; 2970 goto out_free_ethdev; 2971 } 2972 2973 INIT_LIST_HEAD(&port->mc_list->list); 2974 2975 ret = ehea_sense_port_attr(port); 2976 if (ret) 2977 goto out_free_mc_list; 2978 2979 netif_set_real_num_rx_queues(dev, port->num_def_qps); 2980 netif_set_real_num_tx_queues(dev, port->num_def_qps); 2981 2982 port_dev = ehea_register_port(port, dn); 2983 if (!port_dev) 2984 goto out_free_mc_list; 2985 2986 SET_NETDEV_DEV(dev, port_dev); 2987 2988 /* initialize net_device structure */ 2989 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); 2990 2991 dev->netdev_ops = &ehea_netdev_ops; 2992 ehea_set_ethtool_ops(dev); 2993 2994 dev->hw_features = NETIF_F_SG | NETIF_F_TSO | 2995 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX; 2996 dev->features = NETIF_F_SG | NETIF_F_TSO | 2997 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | 2998 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 2999 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM; 3000 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3001 NETIF_F_IP_CSUM; 3002 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3003 3004 /* MTU range: 68 - 9022 */ 3005 dev->min_mtu = ETH_MIN_MTU; 3006 dev->max_mtu = EHEA_MAX_PACKET_SIZE; 3007 3008 INIT_WORK(&port->reset_task, ehea_reset_port); 3009 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3010 3011 init_waitqueue_head(&port->swqe_avail_wq); 3012 init_waitqueue_head(&port->restart_wq); 3013 3014 ret = register_netdev(dev); 3015 if (ret) { 3016 pr_err("register_netdev failed. ret=%d\n", ret); 3017 goto out_unreg_port; 3018 } 3019 3020 ret = ehea_get_jumboframe_status(port, &jumbo); 3021 if (ret) 3022 netdev_err(dev, "failed determining jumbo frame status\n"); 3023 3024 netdev_info(dev, "Jumbo frames are %sabled\n", 3025 jumbo == 1 ? "en" : "dis"); 3026 3027 adapter->active_ports++; 3028 3029 return port; 3030 3031 out_unreg_port: 3032 ehea_unregister_port(port); 3033 3034 out_free_mc_list: 3035 kfree(port->mc_list); 3036 3037 out_free_ethdev: 3038 free_netdev(dev); 3039 3040 out_err: 3041 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3042 logical_port_id, ret); 3043 return NULL; 3044 } 3045 3046 static void ehea_shutdown_single_port(struct ehea_port *port) 3047 { 3048 struct ehea_adapter *adapter = port->adapter; 3049 3050 cancel_work_sync(&port->reset_task); 3051 cancel_delayed_work_sync(&port->stats_work); 3052 unregister_netdev(port->netdev); 3053 ehea_unregister_port(port); 3054 kfree(port->mc_list); 3055 free_netdev(port->netdev); 3056 adapter->active_ports--; 3057 } 3058 3059 static int ehea_setup_ports(struct ehea_adapter *adapter) 3060 { 3061 struct device_node *lhea_dn; 3062 struct device_node *eth_dn = NULL; 3063 3064 const u32 *dn_log_port_id; 3065 int i = 0; 3066 3067 lhea_dn = adapter->ofdev->dev.of_node; 3068 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3069 3070 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3071 NULL); 3072 if (!dn_log_port_id) { 3073 pr_err("bad device node: eth_dn name=%pOF\n", eth_dn); 3074 continue; 3075 } 3076 3077 if (ehea_add_adapter_mr(adapter)) { 3078 pr_err("creating MR failed\n"); 3079 of_node_put(eth_dn); 3080 return -EIO; 3081 } 3082 3083 adapter->port[i] = ehea_setup_single_port(adapter, 3084 *dn_log_port_id, 3085 eth_dn); 3086 if (adapter->port[i]) 3087 netdev_info(adapter->port[i]->netdev, 3088 "logical port id #%d\n", *dn_log_port_id); 3089 else 3090 ehea_remove_adapter_mr(adapter); 3091 3092 i++; 3093 } 3094 return 0; 3095 } 3096 3097 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3098 u32 logical_port_id) 3099 { 3100 struct device_node *lhea_dn; 3101 struct device_node *eth_dn = NULL; 3102 const u32 *dn_log_port_id; 3103 3104 lhea_dn = adapter->ofdev->dev.of_node; 3105 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3106 3107 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3108 NULL); 3109 if (dn_log_port_id) 3110 if (*dn_log_port_id == logical_port_id) 3111 return eth_dn; 3112 } 3113 3114 return NULL; 3115 } 3116 3117 static ssize_t probe_port_store(struct device *dev, 3118 struct device_attribute *attr, 3119 const char *buf, size_t count) 3120 { 3121 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3122 struct ehea_port *port; 3123 struct device_node *eth_dn = NULL; 3124 int i; 3125 3126 u32 logical_port_id; 3127 3128 sscanf(buf, "%d", &logical_port_id); 3129 3130 port = ehea_get_port(adapter, logical_port_id); 3131 3132 if (port) { 3133 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3134 logical_port_id); 3135 return -EINVAL; 3136 } 3137 3138 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3139 3140 if (!eth_dn) { 3141 pr_info("no logical port with id %d found\n", logical_port_id); 3142 return -EINVAL; 3143 } 3144 3145 if (ehea_add_adapter_mr(adapter)) { 3146 pr_err("creating MR failed\n"); 3147 of_node_put(eth_dn); 3148 return -EIO; 3149 } 3150 3151 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3152 3153 of_node_put(eth_dn); 3154 3155 if (port) { 3156 for (i = 0; i < EHEA_MAX_PORTS; i++) 3157 if (!adapter->port[i]) { 3158 adapter->port[i] = port; 3159 break; 3160 } 3161 3162 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3163 logical_port_id); 3164 } else { 3165 ehea_remove_adapter_mr(adapter); 3166 return -EIO; 3167 } 3168 3169 return (ssize_t) count; 3170 } 3171 3172 static ssize_t remove_port_store(struct device *dev, 3173 struct device_attribute *attr, 3174 const char *buf, size_t count) 3175 { 3176 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3177 struct ehea_port *port; 3178 int i; 3179 u32 logical_port_id; 3180 3181 sscanf(buf, "%d", &logical_port_id); 3182 3183 port = ehea_get_port(adapter, logical_port_id); 3184 3185 if (port) { 3186 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3187 logical_port_id); 3188 3189 ehea_shutdown_single_port(port); 3190 3191 for (i = 0; i < EHEA_MAX_PORTS; i++) 3192 if (adapter->port[i] == port) { 3193 adapter->port[i] = NULL; 3194 break; 3195 } 3196 } else { 3197 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3198 logical_port_id); 3199 return -EINVAL; 3200 } 3201 3202 ehea_remove_adapter_mr(adapter); 3203 3204 return (ssize_t) count; 3205 } 3206 3207 static DEVICE_ATTR_WO(probe_port); 3208 static DEVICE_ATTR_WO(remove_port); 3209 3210 static int ehea_create_device_sysfs(struct platform_device *dev) 3211 { 3212 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3213 if (ret) 3214 goto out; 3215 3216 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3217 out: 3218 return ret; 3219 } 3220 3221 static void ehea_remove_device_sysfs(struct platform_device *dev) 3222 { 3223 device_remove_file(&dev->dev, &dev_attr_probe_port); 3224 device_remove_file(&dev->dev, &dev_attr_remove_port); 3225 } 3226 3227 static int ehea_reboot_notifier(struct notifier_block *nb, 3228 unsigned long action, void *unused) 3229 { 3230 if (action == SYS_RESTART) { 3231 pr_info("Reboot: freeing all eHEA resources\n"); 3232 ibmebus_unregister_driver(&ehea_driver); 3233 } 3234 return NOTIFY_DONE; 3235 } 3236 3237 static struct notifier_block ehea_reboot_nb = { 3238 .notifier_call = ehea_reboot_notifier, 3239 }; 3240 3241 static int ehea_mem_notifier(struct notifier_block *nb, 3242 unsigned long action, void *data) 3243 { 3244 int ret = NOTIFY_BAD; 3245 struct memory_notify *arg = data; 3246 3247 mutex_lock(&dlpar_mem_lock); 3248 3249 switch (action) { 3250 case MEM_CANCEL_OFFLINE: 3251 pr_info("memory offlining canceled"); 3252 fallthrough; /* re-add canceled memory block */ 3253 3254 case MEM_ONLINE: 3255 pr_info("memory is going online"); 3256 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3257 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3258 goto out_unlock; 3259 ehea_rereg_mrs(); 3260 break; 3261 3262 case MEM_GOING_OFFLINE: 3263 pr_info("memory is going offline"); 3264 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3265 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3266 goto out_unlock; 3267 ehea_rereg_mrs(); 3268 break; 3269 3270 default: 3271 break; 3272 } 3273 3274 ehea_update_firmware_handles(); 3275 ret = NOTIFY_OK; 3276 3277 out_unlock: 3278 mutex_unlock(&dlpar_mem_lock); 3279 return ret; 3280 } 3281 3282 static struct notifier_block ehea_mem_nb = { 3283 .notifier_call = ehea_mem_notifier, 3284 }; 3285 3286 static void ehea_crash_handler(void) 3287 { 3288 int i; 3289 3290 if (ehea_fw_handles.arr) 3291 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3292 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3293 ehea_fw_handles.arr[i].fwh, 3294 FORCE_FREE); 3295 3296 if (ehea_bcmc_regs.arr) 3297 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3298 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3299 ehea_bcmc_regs.arr[i].port_id, 3300 ehea_bcmc_regs.arr[i].reg_type, 3301 ehea_bcmc_regs.arr[i].macaddr, 3302 0, H_DEREG_BCMC); 3303 } 3304 3305 static atomic_t ehea_memory_hooks_registered; 3306 3307 /* Register memory hooks on probe of first adapter */ 3308 static int ehea_register_memory_hooks(void) 3309 { 3310 int ret = 0; 3311 3312 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1) 3313 return 0; 3314 3315 ret = ehea_create_busmap(); 3316 if (ret) { 3317 pr_info("ehea_create_busmap failed\n"); 3318 goto out; 3319 } 3320 3321 ret = register_reboot_notifier(&ehea_reboot_nb); 3322 if (ret) { 3323 pr_info("register_reboot_notifier failed\n"); 3324 goto out; 3325 } 3326 3327 ret = register_memory_notifier(&ehea_mem_nb); 3328 if (ret) { 3329 pr_info("register_memory_notifier failed\n"); 3330 goto out2; 3331 } 3332 3333 ret = crash_shutdown_register(ehea_crash_handler); 3334 if (ret) { 3335 pr_info("crash_shutdown_register failed\n"); 3336 goto out3; 3337 } 3338 3339 return 0; 3340 3341 out3: 3342 unregister_memory_notifier(&ehea_mem_nb); 3343 out2: 3344 unregister_reboot_notifier(&ehea_reboot_nb); 3345 out: 3346 atomic_dec(&ehea_memory_hooks_registered); 3347 return ret; 3348 } 3349 3350 static void ehea_unregister_memory_hooks(void) 3351 { 3352 /* Only remove the hooks if we've registered them */ 3353 if (atomic_read(&ehea_memory_hooks_registered) == 0) 3354 return; 3355 3356 unregister_reboot_notifier(&ehea_reboot_nb); 3357 if (crash_shutdown_unregister(ehea_crash_handler)) 3358 pr_info("failed unregistering crash handler\n"); 3359 unregister_memory_notifier(&ehea_mem_nb); 3360 } 3361 3362 static int ehea_probe_adapter(struct platform_device *dev) 3363 { 3364 struct ehea_adapter *adapter; 3365 const u64 *adapter_handle; 3366 int ret; 3367 int i; 3368 3369 ret = ehea_register_memory_hooks(); 3370 if (ret) 3371 return ret; 3372 3373 if (!dev || !dev->dev.of_node) { 3374 pr_err("Invalid ibmebus device probed\n"); 3375 return -EINVAL; 3376 } 3377 3378 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL); 3379 if (!adapter) { 3380 ret = -ENOMEM; 3381 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3382 goto out; 3383 } 3384 3385 list_add(&adapter->list, &adapter_list); 3386 3387 adapter->ofdev = dev; 3388 3389 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3390 NULL); 3391 if (adapter_handle) 3392 adapter->handle = *adapter_handle; 3393 3394 if (!adapter->handle) { 3395 dev_err(&dev->dev, "failed getting handle for adapter" 3396 " '%pOF'\n", dev->dev.of_node); 3397 ret = -ENODEV; 3398 goto out_free_ad; 3399 } 3400 3401 adapter->pd = EHEA_PD_ID; 3402 3403 platform_set_drvdata(dev, adapter); 3404 3405 3406 /* initialize adapter and ports */ 3407 /* get adapter properties */ 3408 ret = ehea_sense_adapter_attr(adapter); 3409 if (ret) { 3410 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3411 goto out_free_ad; 3412 } 3413 3414 adapter->neq = ehea_create_eq(adapter, 3415 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3416 if (!adapter->neq) { 3417 ret = -EIO; 3418 dev_err(&dev->dev, "NEQ creation failed\n"); 3419 goto out_free_ad; 3420 } 3421 3422 tasklet_setup(&adapter->neq_tasklet, ehea_neq_tasklet); 3423 3424 ret = ehea_create_device_sysfs(dev); 3425 if (ret) 3426 goto out_kill_eq; 3427 3428 ret = ehea_setup_ports(adapter); 3429 if (ret) { 3430 dev_err(&dev->dev, "setup_ports failed\n"); 3431 goto out_rem_dev_sysfs; 3432 } 3433 3434 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3435 ehea_interrupt_neq, 0, 3436 "ehea_neq", adapter); 3437 if (ret) { 3438 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3439 goto out_shutdown_ports; 3440 } 3441 3442 /* Handle any events that might be pending. */ 3443 tasklet_hi_schedule(&adapter->neq_tasklet); 3444 3445 ret = 0; 3446 goto out; 3447 3448 out_shutdown_ports: 3449 for (i = 0; i < EHEA_MAX_PORTS; i++) 3450 if (adapter->port[i]) { 3451 ehea_shutdown_single_port(adapter->port[i]); 3452 adapter->port[i] = NULL; 3453 } 3454 3455 out_rem_dev_sysfs: 3456 ehea_remove_device_sysfs(dev); 3457 3458 out_kill_eq: 3459 ehea_destroy_eq(adapter->neq); 3460 3461 out_free_ad: 3462 list_del(&adapter->list); 3463 3464 out: 3465 ehea_update_firmware_handles(); 3466 3467 return ret; 3468 } 3469 3470 static int ehea_remove(struct platform_device *dev) 3471 { 3472 struct ehea_adapter *adapter = platform_get_drvdata(dev); 3473 int i; 3474 3475 for (i = 0; i < EHEA_MAX_PORTS; i++) 3476 if (adapter->port[i]) { 3477 ehea_shutdown_single_port(adapter->port[i]); 3478 adapter->port[i] = NULL; 3479 } 3480 3481 ehea_remove_device_sysfs(dev); 3482 3483 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3484 tasklet_kill(&adapter->neq_tasklet); 3485 3486 ehea_destroy_eq(adapter->neq); 3487 ehea_remove_adapter_mr(adapter); 3488 list_del(&adapter->list); 3489 3490 ehea_update_firmware_handles(); 3491 3492 return 0; 3493 } 3494 3495 static int check_module_parm(void) 3496 { 3497 int ret = 0; 3498 3499 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3500 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3501 pr_info("Bad parameter: rq1_entries\n"); 3502 ret = -EINVAL; 3503 } 3504 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3505 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3506 pr_info("Bad parameter: rq2_entries\n"); 3507 ret = -EINVAL; 3508 } 3509 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3510 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3511 pr_info("Bad parameter: rq3_entries\n"); 3512 ret = -EINVAL; 3513 } 3514 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3515 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3516 pr_info("Bad parameter: sq_entries\n"); 3517 ret = -EINVAL; 3518 } 3519 3520 return ret; 3521 } 3522 3523 static ssize_t capabilities_show(struct device_driver *drv, char *buf) 3524 { 3525 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3526 } 3527 3528 static DRIVER_ATTR_RO(capabilities); 3529 3530 static int __init ehea_module_init(void) 3531 { 3532 int ret; 3533 3534 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3535 3536 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3537 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3538 3539 mutex_init(&ehea_fw_handles.lock); 3540 spin_lock_init(&ehea_bcmc_regs.lock); 3541 3542 ret = check_module_parm(); 3543 if (ret) 3544 goto out; 3545 3546 ret = ibmebus_register_driver(&ehea_driver); 3547 if (ret) { 3548 pr_err("failed registering eHEA device driver on ebus\n"); 3549 goto out; 3550 } 3551 3552 ret = driver_create_file(&ehea_driver.driver, 3553 &driver_attr_capabilities); 3554 if (ret) { 3555 pr_err("failed to register capabilities attribute, ret=%d\n", 3556 ret); 3557 goto out2; 3558 } 3559 3560 return ret; 3561 3562 out2: 3563 ibmebus_unregister_driver(&ehea_driver); 3564 out: 3565 return ret; 3566 } 3567 3568 static void __exit ehea_module_exit(void) 3569 { 3570 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3571 ibmebus_unregister_driver(&ehea_driver); 3572 ehea_unregister_memory_hooks(); 3573 kfree(ehea_fw_handles.arr); 3574 kfree(ehea_bcmc_regs.arr); 3575 ehea_destroy_busmap(); 3576 } 3577 3578 module_init(ehea_module_init); 3579 module_exit(ehea_module_exit); 3580