1 /* 2 * linux/drivers/net/ethernet/ibm/ehea/ehea_main.c 3 * 4 * eHEA ethernet device driver for IBM eServer System p 5 * 6 * (C) Copyright IBM Corp. 2006 7 * 8 * Authors: 9 * Christoph Raisch <raisch@de.ibm.com> 10 * Jan-Bernd Themann <themann@de.ibm.com> 11 * Thomas Klein <tklein@de.ibm.com> 12 * 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2, or (at your option) 17 * any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 27 */ 28 29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 30 31 #include <linux/device.h> 32 #include <linux/in.h> 33 #include <linux/ip.h> 34 #include <linux/tcp.h> 35 #include <linux/udp.h> 36 #include <linux/if.h> 37 #include <linux/list.h> 38 #include <linux/slab.h> 39 #include <linux/if_ether.h> 40 #include <linux/notifier.h> 41 #include <linux/reboot.h> 42 #include <linux/memory.h> 43 #include <asm/kexec.h> 44 #include <linux/mutex.h> 45 #include <linux/prefetch.h> 46 47 #include <net/ip.h> 48 49 #include "ehea.h" 50 #include "ehea_qmr.h" 51 #include "ehea_phyp.h" 52 53 54 MODULE_LICENSE("GPL"); 55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>"); 56 MODULE_DESCRIPTION("IBM eServer HEA Driver"); 57 MODULE_VERSION(DRV_VERSION); 58 59 60 static int msg_level = -1; 61 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1; 62 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2; 63 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3; 64 static int sq_entries = EHEA_DEF_ENTRIES_SQ; 65 static int use_mcs = 1; 66 static int prop_carrier_state; 67 68 module_param(msg_level, int, 0); 69 module_param(rq1_entries, int, 0); 70 module_param(rq2_entries, int, 0); 71 module_param(rq3_entries, int, 0); 72 module_param(sq_entries, int, 0); 73 module_param(prop_carrier_state, int, 0); 74 module_param(use_mcs, int, 0); 75 76 MODULE_PARM_DESC(msg_level, "msg_level"); 77 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical " 78 "port to stack. 1:yes, 0:no. Default = 0 "); 79 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 " 80 "[2^x - 1], x = [7..14]. Default = " 81 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")"); 82 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 " 83 "[2^x - 1], x = [7..14]. Default = " 84 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")"); 85 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 " 86 "[2^x - 1], x = [7..14]. Default = " 87 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")"); 88 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue " 89 "[2^x - 1], x = [7..14]. Default = " 90 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); 91 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, " 92 "Default = 1"); 93 94 static int port_name_cnt; 95 static LIST_HEAD(adapter_list); 96 static unsigned long ehea_driver_flags; 97 static DEFINE_MUTEX(dlpar_mem_lock); 98 static struct ehea_fw_handle_array ehea_fw_handles; 99 static struct ehea_bcmc_reg_array ehea_bcmc_regs; 100 101 102 static int ehea_probe_adapter(struct platform_device *dev); 103 104 static int ehea_remove(struct platform_device *dev); 105 106 static const struct of_device_id ehea_module_device_table[] = { 107 { 108 .name = "lhea", 109 .compatible = "IBM,lhea", 110 }, 111 { 112 .type = "network", 113 .compatible = "IBM,lhea-ethernet", 114 }, 115 {}, 116 }; 117 MODULE_DEVICE_TABLE(of, ehea_module_device_table); 118 119 static const struct of_device_id ehea_device_table[] = { 120 { 121 .name = "lhea", 122 .compatible = "IBM,lhea", 123 }, 124 {}, 125 }; 126 127 static struct platform_driver ehea_driver = { 128 .driver = { 129 .name = "ehea", 130 .owner = THIS_MODULE, 131 .of_match_table = ehea_device_table, 132 }, 133 .probe = ehea_probe_adapter, 134 .remove = ehea_remove, 135 }; 136 137 void ehea_dump(void *adr, int len, char *msg) 138 { 139 int x; 140 unsigned char *deb = adr; 141 for (x = 0; x < len; x += 16) { 142 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n", 143 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8])); 144 deb += 16; 145 } 146 } 147 148 static void ehea_schedule_port_reset(struct ehea_port *port) 149 { 150 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags)) 151 schedule_work(&port->reset_task); 152 } 153 154 static void ehea_update_firmware_handles(void) 155 { 156 struct ehea_fw_handle_entry *arr = NULL; 157 struct ehea_adapter *adapter; 158 int num_adapters = 0; 159 int num_ports = 0; 160 int num_portres = 0; 161 int i = 0; 162 int num_fw_handles, k, l; 163 164 /* Determine number of handles */ 165 mutex_lock(&ehea_fw_handles.lock); 166 167 list_for_each_entry(adapter, &adapter_list, list) { 168 num_adapters++; 169 170 for (k = 0; k < EHEA_MAX_PORTS; k++) { 171 struct ehea_port *port = adapter->port[k]; 172 173 if (!port || (port->state != EHEA_PORT_UP)) 174 continue; 175 176 num_ports++; 177 num_portres += port->num_def_qps; 178 } 179 } 180 181 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES + 182 num_ports * EHEA_NUM_PORT_FW_HANDLES + 183 num_portres * EHEA_NUM_PORTRES_FW_HANDLES; 184 185 if (num_fw_handles) { 186 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL); 187 if (!arr) 188 goto out; /* Keep the existing array */ 189 } else 190 goto out_update; 191 192 list_for_each_entry(adapter, &adapter_list, list) { 193 if (num_adapters == 0) 194 break; 195 196 for (k = 0; k < EHEA_MAX_PORTS; k++) { 197 struct ehea_port *port = adapter->port[k]; 198 199 if (!port || (port->state != EHEA_PORT_UP) || 200 (num_ports == 0)) 201 continue; 202 203 for (l = 0; l < port->num_def_qps; l++) { 204 struct ehea_port_res *pr = &port->port_res[l]; 205 206 arr[i].adh = adapter->handle; 207 arr[i++].fwh = pr->qp->fw_handle; 208 arr[i].adh = adapter->handle; 209 arr[i++].fwh = pr->send_cq->fw_handle; 210 arr[i].adh = adapter->handle; 211 arr[i++].fwh = pr->recv_cq->fw_handle; 212 arr[i].adh = adapter->handle; 213 arr[i++].fwh = pr->eq->fw_handle; 214 arr[i].adh = adapter->handle; 215 arr[i++].fwh = pr->send_mr.handle; 216 arr[i].adh = adapter->handle; 217 arr[i++].fwh = pr->recv_mr.handle; 218 } 219 arr[i].adh = adapter->handle; 220 arr[i++].fwh = port->qp_eq->fw_handle; 221 num_ports--; 222 } 223 224 arr[i].adh = adapter->handle; 225 arr[i++].fwh = adapter->neq->fw_handle; 226 227 if (adapter->mr.handle) { 228 arr[i].adh = adapter->handle; 229 arr[i++].fwh = adapter->mr.handle; 230 } 231 num_adapters--; 232 } 233 234 out_update: 235 kfree(ehea_fw_handles.arr); 236 ehea_fw_handles.arr = arr; 237 ehea_fw_handles.num_entries = i; 238 out: 239 mutex_unlock(&ehea_fw_handles.lock); 240 } 241 242 static void ehea_update_bcmc_registrations(void) 243 { 244 unsigned long flags; 245 struct ehea_bcmc_reg_entry *arr = NULL; 246 struct ehea_adapter *adapter; 247 struct ehea_mc_list *mc_entry; 248 int num_registrations = 0; 249 int i = 0; 250 int k; 251 252 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags); 253 254 /* Determine number of registrations */ 255 list_for_each_entry(adapter, &adapter_list, list) 256 for (k = 0; k < EHEA_MAX_PORTS; k++) { 257 struct ehea_port *port = adapter->port[k]; 258 259 if (!port || (port->state != EHEA_PORT_UP)) 260 continue; 261 262 num_registrations += 2; /* Broadcast registrations */ 263 264 list_for_each_entry(mc_entry, &port->mc_list->list,list) 265 num_registrations += 2; 266 } 267 268 if (num_registrations) { 269 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC); 270 if (!arr) 271 goto out; /* Keep the existing array */ 272 } else 273 goto out_update; 274 275 list_for_each_entry(adapter, &adapter_list, list) { 276 for (k = 0; k < EHEA_MAX_PORTS; k++) { 277 struct ehea_port *port = adapter->port[k]; 278 279 if (!port || (port->state != EHEA_PORT_UP)) 280 continue; 281 282 if (num_registrations == 0) 283 goto out_update; 284 285 arr[i].adh = adapter->handle; 286 arr[i].port_id = port->logical_port_id; 287 arr[i].reg_type = EHEA_BCMC_BROADCAST | 288 EHEA_BCMC_UNTAGGED; 289 arr[i++].macaddr = port->mac_addr; 290 291 arr[i].adh = adapter->handle; 292 arr[i].port_id = port->logical_port_id; 293 arr[i].reg_type = EHEA_BCMC_BROADCAST | 294 EHEA_BCMC_VLANID_ALL; 295 arr[i++].macaddr = port->mac_addr; 296 num_registrations -= 2; 297 298 list_for_each_entry(mc_entry, 299 &port->mc_list->list, list) { 300 if (num_registrations == 0) 301 goto out_update; 302 303 arr[i].adh = adapter->handle; 304 arr[i].port_id = port->logical_port_id; 305 arr[i].reg_type = EHEA_BCMC_MULTICAST | 306 EHEA_BCMC_UNTAGGED; 307 if (mc_entry->macaddr == 0) 308 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 309 arr[i++].macaddr = mc_entry->macaddr; 310 311 arr[i].adh = adapter->handle; 312 arr[i].port_id = port->logical_port_id; 313 arr[i].reg_type = EHEA_BCMC_MULTICAST | 314 EHEA_BCMC_VLANID_ALL; 315 if (mc_entry->macaddr == 0) 316 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 317 arr[i++].macaddr = mc_entry->macaddr; 318 num_registrations -= 2; 319 } 320 } 321 } 322 323 out_update: 324 kfree(ehea_bcmc_regs.arr); 325 ehea_bcmc_regs.arr = arr; 326 ehea_bcmc_regs.num_entries = i; 327 out: 328 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags); 329 } 330 331 static void ehea_get_stats64(struct net_device *dev, 332 struct rtnl_link_stats64 *stats) 333 { 334 struct ehea_port *port = netdev_priv(dev); 335 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0; 336 int i; 337 338 for (i = 0; i < port->num_def_qps; i++) { 339 rx_packets += port->port_res[i].rx_packets; 340 rx_bytes += port->port_res[i].rx_bytes; 341 } 342 343 for (i = 0; i < port->num_def_qps; i++) { 344 tx_packets += port->port_res[i].tx_packets; 345 tx_bytes += port->port_res[i].tx_bytes; 346 } 347 348 stats->tx_packets = tx_packets; 349 stats->rx_bytes = rx_bytes; 350 stats->tx_bytes = tx_bytes; 351 stats->rx_packets = rx_packets; 352 353 stats->multicast = port->stats.multicast; 354 stats->rx_errors = port->stats.rx_errors; 355 } 356 357 static void ehea_update_stats(struct work_struct *work) 358 { 359 struct ehea_port *port = 360 container_of(work, struct ehea_port, stats_work.work); 361 struct net_device *dev = port->netdev; 362 struct rtnl_link_stats64 *stats = &port->stats; 363 struct hcp_ehea_port_cb2 *cb2; 364 u64 hret; 365 366 cb2 = (void *)get_zeroed_page(GFP_KERNEL); 367 if (!cb2) { 368 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n"); 369 goto resched; 370 } 371 372 hret = ehea_h_query_ehea_port(port->adapter->handle, 373 port->logical_port_id, 374 H_PORT_CB2, H_PORT_CB2_ALL, cb2); 375 if (hret != H_SUCCESS) { 376 netdev_err(dev, "query_ehea_port failed\n"); 377 goto out_herr; 378 } 379 380 if (netif_msg_hw(port)) 381 ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); 382 383 stats->multicast = cb2->rxmcp; 384 stats->rx_errors = cb2->rxuerr; 385 386 out_herr: 387 free_page((unsigned long)cb2); 388 resched: 389 schedule_delayed_work(&port->stats_work, 390 round_jiffies_relative(msecs_to_jiffies(1000))); 391 } 392 393 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) 394 { 395 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 396 struct net_device *dev = pr->port->netdev; 397 int max_index_mask = pr->rq1_skba.len - 1; 398 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; 399 int adder = 0; 400 int i; 401 402 pr->rq1_skba.os_skbs = 0; 403 404 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 405 if (nr_of_wqes > 0) 406 pr->rq1_skba.index = index; 407 pr->rq1_skba.os_skbs = fill_wqes; 408 return; 409 } 410 411 for (i = 0; i < fill_wqes; i++) { 412 if (!skb_arr_rq1[index]) { 413 skb_arr_rq1[index] = netdev_alloc_skb(dev, 414 EHEA_L_PKT_SIZE); 415 if (!skb_arr_rq1[index]) { 416 pr->rq1_skba.os_skbs = fill_wqes - i; 417 break; 418 } 419 } 420 index--; 421 index &= max_index_mask; 422 adder++; 423 } 424 425 if (adder == 0) 426 return; 427 428 /* Ring doorbell */ 429 ehea_update_rq1a(pr->qp, adder); 430 } 431 432 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) 433 { 434 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 435 struct net_device *dev = pr->port->netdev; 436 int i; 437 438 if (nr_rq1a > pr->rq1_skba.len) { 439 netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); 440 return; 441 } 442 443 for (i = 0; i < nr_rq1a; i++) { 444 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); 445 if (!skb_arr_rq1[i]) 446 break; 447 } 448 /* Ring doorbell */ 449 ehea_update_rq1a(pr->qp, i - 1); 450 } 451 452 static int ehea_refill_rq_def(struct ehea_port_res *pr, 453 struct ehea_q_skb_arr *q_skba, int rq_nr, 454 int num_wqes, int wqe_type, int packet_size) 455 { 456 struct net_device *dev = pr->port->netdev; 457 struct ehea_qp *qp = pr->qp; 458 struct sk_buff **skb_arr = q_skba->arr; 459 struct ehea_rwqe *rwqe; 460 int i, index, max_index_mask, fill_wqes; 461 int adder = 0; 462 int ret = 0; 463 464 fill_wqes = q_skba->os_skbs + num_wqes; 465 q_skba->os_skbs = 0; 466 467 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 468 q_skba->os_skbs = fill_wqes; 469 return ret; 470 } 471 472 index = q_skba->index; 473 max_index_mask = q_skba->len - 1; 474 for (i = 0; i < fill_wqes; i++) { 475 u64 tmp_addr; 476 struct sk_buff *skb; 477 478 skb = netdev_alloc_skb_ip_align(dev, packet_size); 479 if (!skb) { 480 q_skba->os_skbs = fill_wqes - i; 481 if (q_skba->os_skbs == q_skba->len - 2) { 482 netdev_info(pr->port->netdev, 483 "rq%i ran dry - no mem for skb\n", 484 rq_nr); 485 ret = -ENOMEM; 486 } 487 break; 488 } 489 490 skb_arr[index] = skb; 491 tmp_addr = ehea_map_vaddr(skb->data); 492 if (tmp_addr == -1) { 493 dev_consume_skb_any(skb); 494 q_skba->os_skbs = fill_wqes - i; 495 ret = 0; 496 break; 497 } 498 499 rwqe = ehea_get_next_rwqe(qp, rq_nr); 500 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type) 501 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index); 502 rwqe->sg_list[0].l_key = pr->recv_mr.lkey; 503 rwqe->sg_list[0].vaddr = tmp_addr; 504 rwqe->sg_list[0].len = packet_size; 505 rwqe->data_segments = 1; 506 507 index++; 508 index &= max_index_mask; 509 adder++; 510 } 511 512 q_skba->index = index; 513 if (adder == 0) 514 goto out; 515 516 /* Ring doorbell */ 517 iosync(); 518 if (rq_nr == 2) 519 ehea_update_rq2a(pr->qp, adder); 520 else 521 ehea_update_rq3a(pr->qp, adder); 522 out: 523 return ret; 524 } 525 526 527 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) 528 { 529 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, 530 nr_of_wqes, EHEA_RWQE2_TYPE, 531 EHEA_RQ2_PKT_SIZE); 532 } 533 534 535 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) 536 { 537 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, 538 nr_of_wqes, EHEA_RWQE3_TYPE, 539 EHEA_MAX_PACKET_SIZE); 540 } 541 542 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) 543 { 544 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; 545 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) 546 return 0; 547 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && 548 (cqe->header_length == 0)) 549 return 0; 550 return -EINVAL; 551 } 552 553 static inline void ehea_fill_skb(struct net_device *dev, 554 struct sk_buff *skb, struct ehea_cqe *cqe, 555 struct ehea_port_res *pr) 556 { 557 int length = cqe->num_bytes_transfered - 4; /*remove CRC */ 558 559 skb_put(skb, length); 560 skb->protocol = eth_type_trans(skb, dev); 561 562 /* The packet was not an IPV4 packet so a complemented checksum was 563 calculated. The value is found in the Internet Checksum field. */ 564 if (cqe->status & EHEA_CQE_BLIND_CKSUM) { 565 skb->ip_summed = CHECKSUM_COMPLETE; 566 skb->csum = csum_unfold(~cqe->inet_checksum_value); 567 } else 568 skb->ip_summed = CHECKSUM_UNNECESSARY; 569 570 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]); 571 } 572 573 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, 574 int arr_len, 575 struct ehea_cqe *cqe) 576 { 577 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 578 struct sk_buff *skb; 579 void *pref; 580 int x; 581 582 x = skb_index + 1; 583 x &= (arr_len - 1); 584 585 pref = skb_array[x]; 586 if (pref) { 587 prefetchw(pref); 588 prefetchw(pref + EHEA_CACHE_LINE); 589 590 pref = (skb_array[x]->data); 591 prefetch(pref); 592 prefetch(pref + EHEA_CACHE_LINE); 593 prefetch(pref + EHEA_CACHE_LINE * 2); 594 prefetch(pref + EHEA_CACHE_LINE * 3); 595 } 596 597 skb = skb_array[skb_index]; 598 skb_array[skb_index] = NULL; 599 return skb; 600 } 601 602 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, 603 int arr_len, int wqe_index) 604 { 605 struct sk_buff *skb; 606 void *pref; 607 int x; 608 609 x = wqe_index + 1; 610 x &= (arr_len - 1); 611 612 pref = skb_array[x]; 613 if (pref) { 614 prefetchw(pref); 615 prefetchw(pref + EHEA_CACHE_LINE); 616 617 pref = (skb_array[x]->data); 618 prefetchw(pref); 619 prefetchw(pref + EHEA_CACHE_LINE); 620 } 621 622 skb = skb_array[wqe_index]; 623 skb_array[wqe_index] = NULL; 624 return skb; 625 } 626 627 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, 628 struct ehea_cqe *cqe, int *processed_rq2, 629 int *processed_rq3) 630 { 631 struct sk_buff *skb; 632 633 if (cqe->status & EHEA_CQE_STAT_ERR_TCP) 634 pr->p_stats.err_tcp_cksum++; 635 if (cqe->status & EHEA_CQE_STAT_ERR_IP) 636 pr->p_stats.err_ip_cksum++; 637 if (cqe->status & EHEA_CQE_STAT_ERR_CRC) 638 pr->p_stats.err_frame_crc++; 639 640 if (rq == 2) { 641 *processed_rq2 += 1; 642 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe); 643 dev_kfree_skb(skb); 644 } else if (rq == 3) { 645 *processed_rq3 += 1; 646 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe); 647 dev_kfree_skb(skb); 648 } 649 650 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) { 651 if (netif_msg_rx_err(pr->port)) { 652 pr_err("Critical receive error for QP %d. Resetting port.\n", 653 pr->qp->init_attr.qp_nr); 654 ehea_dump(cqe, sizeof(*cqe), "CQE"); 655 } 656 ehea_schedule_port_reset(pr->port); 657 return 1; 658 } 659 660 return 0; 661 } 662 663 static int ehea_proc_rwqes(struct net_device *dev, 664 struct ehea_port_res *pr, 665 int budget) 666 { 667 struct ehea_port *port = pr->port; 668 struct ehea_qp *qp = pr->qp; 669 struct ehea_cqe *cqe; 670 struct sk_buff *skb; 671 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 672 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; 673 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; 674 int skb_arr_rq1_len = pr->rq1_skba.len; 675 int skb_arr_rq2_len = pr->rq2_skba.len; 676 int skb_arr_rq3_len = pr->rq3_skba.len; 677 int processed, processed_rq1, processed_rq2, processed_rq3; 678 u64 processed_bytes = 0; 679 int wqe_index, last_wqe_index, rq, port_reset; 680 681 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; 682 last_wqe_index = 0; 683 684 cqe = ehea_poll_rq1(qp, &wqe_index); 685 while ((processed < budget) && cqe) { 686 ehea_inc_rq1(qp); 687 processed_rq1++; 688 processed++; 689 if (netif_msg_rx_status(port)) 690 ehea_dump(cqe, sizeof(*cqe), "CQE"); 691 692 last_wqe_index = wqe_index; 693 rmb(); 694 if (!ehea_check_cqe(cqe, &rq)) { 695 if (rq == 1) { 696 /* LL RQ1 */ 697 skb = get_skb_by_index_ll(skb_arr_rq1, 698 skb_arr_rq1_len, 699 wqe_index); 700 if (unlikely(!skb)) { 701 netif_info(port, rx_err, dev, 702 "LL rq1: skb=NULL\n"); 703 704 skb = netdev_alloc_skb(dev, 705 EHEA_L_PKT_SIZE); 706 if (!skb) 707 break; 708 } 709 skb_copy_to_linear_data(skb, ((char *)cqe) + 64, 710 cqe->num_bytes_transfered - 4); 711 ehea_fill_skb(dev, skb, cqe, pr); 712 } else if (rq == 2) { 713 /* RQ2 */ 714 skb = get_skb_by_index(skb_arr_rq2, 715 skb_arr_rq2_len, cqe); 716 if (unlikely(!skb)) { 717 netif_err(port, rx_err, dev, 718 "rq2: skb=NULL\n"); 719 break; 720 } 721 ehea_fill_skb(dev, skb, cqe, pr); 722 processed_rq2++; 723 } else { 724 /* RQ3 */ 725 skb = get_skb_by_index(skb_arr_rq3, 726 skb_arr_rq3_len, cqe); 727 if (unlikely(!skb)) { 728 netif_err(port, rx_err, dev, 729 "rq3: skb=NULL\n"); 730 break; 731 } 732 ehea_fill_skb(dev, skb, cqe, pr); 733 processed_rq3++; 734 } 735 736 processed_bytes += skb->len; 737 738 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 739 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 740 cqe->vlan_tag); 741 742 napi_gro_receive(&pr->napi, skb); 743 } else { 744 pr->p_stats.poll_receive_errors++; 745 port_reset = ehea_treat_poll_error(pr, rq, cqe, 746 &processed_rq2, 747 &processed_rq3); 748 if (port_reset) 749 break; 750 } 751 cqe = ehea_poll_rq1(qp, &wqe_index); 752 } 753 754 pr->rx_packets += processed; 755 pr->rx_bytes += processed_bytes; 756 757 ehea_refill_rq1(pr, last_wqe_index, processed_rq1); 758 ehea_refill_rq2(pr, processed_rq2); 759 ehea_refill_rq3(pr, processed_rq3); 760 761 return processed; 762 } 763 764 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull 765 766 static void reset_sq_restart_flag(struct ehea_port *port) 767 { 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 pr->sq_restart_flag = 0; 773 } 774 wake_up(&port->restart_wq); 775 } 776 777 static void check_sqs(struct ehea_port *port) 778 { 779 struct ehea_swqe *swqe; 780 int swqe_index; 781 int i, k; 782 783 for (i = 0; i < port->num_def_qps; i++) { 784 struct ehea_port_res *pr = &port->port_res[i]; 785 int ret; 786 k = 0; 787 swqe = ehea_get_swqe(pr->qp, &swqe_index); 788 memset(swqe, 0, SWQE_HEADER_SIZE); 789 atomic_dec(&pr->swqe_avail); 790 791 swqe->tx_control |= EHEA_SWQE_PURGE; 792 swqe->wr_id = SWQE_RESTART_CHECK; 793 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 794 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; 795 swqe->immediate_data_length = 80; 796 797 ehea_post_swqe(pr->qp, swqe); 798 799 ret = wait_event_timeout(port->restart_wq, 800 pr->sq_restart_flag == 0, 801 msecs_to_jiffies(100)); 802 803 if (!ret) { 804 pr_err("HW/SW queues out of sync\n"); 805 ehea_schedule_port_reset(pr->port); 806 return; 807 } 808 } 809 } 810 811 812 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) 813 { 814 struct sk_buff *skb; 815 struct ehea_cq *send_cq = pr->send_cq; 816 struct ehea_cqe *cqe; 817 int quota = my_quota; 818 int cqe_counter = 0; 819 int swqe_av = 0; 820 int index; 821 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, 822 pr - &pr->port->port_res[0]); 823 824 cqe = ehea_poll_cq(send_cq); 825 while (cqe && (quota > 0)) { 826 ehea_inc_cq(send_cq); 827 828 cqe_counter++; 829 rmb(); 830 831 if (cqe->wr_id == SWQE_RESTART_CHECK) { 832 pr->sq_restart_flag = 1; 833 swqe_av++; 834 break; 835 } 836 837 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { 838 pr_err("Bad send completion status=0x%04X\n", 839 cqe->status); 840 841 if (netif_msg_tx_err(pr->port)) 842 ehea_dump(cqe, sizeof(*cqe), "Send CQE"); 843 844 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { 845 pr_err("Resetting port\n"); 846 ehea_schedule_port_reset(pr->port); 847 break; 848 } 849 } 850 851 if (netif_msg_tx_done(pr->port)) 852 ehea_dump(cqe, sizeof(*cqe), "CQE"); 853 854 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) 855 == EHEA_SWQE2_TYPE)) { 856 857 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 858 skb = pr->sq_skba.arr[index]; 859 dev_consume_skb_any(skb); 860 pr->sq_skba.arr[index] = NULL; 861 } 862 863 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); 864 quota--; 865 866 cqe = ehea_poll_cq(send_cq); 867 } 868 869 ehea_update_feca(send_cq, cqe_counter); 870 atomic_add(swqe_av, &pr->swqe_avail); 871 872 if (unlikely(netif_tx_queue_stopped(txq) && 873 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { 874 __netif_tx_lock(txq, smp_processor_id()); 875 if (netif_tx_queue_stopped(txq) && 876 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) 877 netif_tx_wake_queue(txq); 878 __netif_tx_unlock(txq); 879 } 880 881 wake_up(&pr->port->swqe_avail_wq); 882 883 return cqe; 884 } 885 886 #define EHEA_POLL_MAX_CQES 65535 887 888 static int ehea_poll(struct napi_struct *napi, int budget) 889 { 890 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, 891 napi); 892 struct net_device *dev = pr->port->netdev; 893 struct ehea_cqe *cqe; 894 struct ehea_cqe *cqe_skb = NULL; 895 int wqe_index; 896 int rx = 0; 897 898 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 899 rx += ehea_proc_rwqes(dev, pr, budget - rx); 900 901 while (rx != budget) { 902 napi_complete(napi); 903 ehea_reset_cq_ep(pr->recv_cq); 904 ehea_reset_cq_ep(pr->send_cq); 905 ehea_reset_cq_n1(pr->recv_cq); 906 ehea_reset_cq_n1(pr->send_cq); 907 rmb(); 908 cqe = ehea_poll_rq1(pr->qp, &wqe_index); 909 cqe_skb = ehea_poll_cq(pr->send_cq); 910 911 if (!cqe && !cqe_skb) 912 return rx; 913 914 if (!napi_reschedule(napi)) 915 return rx; 916 917 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 918 rx += ehea_proc_rwqes(dev, pr, budget - rx); 919 } 920 921 return rx; 922 } 923 924 #ifdef CONFIG_NET_POLL_CONTROLLER 925 static void ehea_netpoll(struct net_device *dev) 926 { 927 struct ehea_port *port = netdev_priv(dev); 928 int i; 929 930 for (i = 0; i < port->num_def_qps; i++) 931 napi_schedule(&port->port_res[i].napi); 932 } 933 #endif 934 935 static irqreturn_t ehea_recv_irq_handler(int irq, void *param) 936 { 937 struct ehea_port_res *pr = param; 938 939 napi_schedule(&pr->napi); 940 941 return IRQ_HANDLED; 942 } 943 944 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) 945 { 946 struct ehea_port *port = param; 947 struct ehea_eqe *eqe; 948 struct ehea_qp *qp; 949 u32 qp_token; 950 u64 resource_type, aer, aerr; 951 int reset_port = 0; 952 953 eqe = ehea_poll_eq(port->qp_eq); 954 955 while (eqe) { 956 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); 957 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", 958 eqe->entry, qp_token); 959 960 qp = port->port_res[qp_token].qp; 961 962 resource_type = ehea_error_data(port->adapter, qp->fw_handle, 963 &aer, &aerr); 964 965 if (resource_type == EHEA_AER_RESTYPE_QP) { 966 if ((aer & EHEA_AER_RESET_MASK) || 967 (aerr & EHEA_AERR_RESET_MASK)) 968 reset_port = 1; 969 } else 970 reset_port = 1; /* Reset in case of CQ or EQ error */ 971 972 eqe = ehea_poll_eq(port->qp_eq); 973 } 974 975 if (reset_port) { 976 pr_err("Resetting port\n"); 977 ehea_schedule_port_reset(port); 978 } 979 980 return IRQ_HANDLED; 981 } 982 983 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, 984 int logical_port) 985 { 986 int i; 987 988 for (i = 0; i < EHEA_MAX_PORTS; i++) 989 if (adapter->port[i]) 990 if (adapter->port[i]->logical_port_id == logical_port) 991 return adapter->port[i]; 992 return NULL; 993 } 994 995 int ehea_sense_port_attr(struct ehea_port *port) 996 { 997 int ret; 998 u64 hret; 999 struct hcp_ehea_port_cb0 *cb0; 1000 1001 /* may be called via ehea_neq_tasklet() */ 1002 cb0 = (void *)get_zeroed_page(GFP_ATOMIC); 1003 if (!cb0) { 1004 pr_err("no mem for cb0\n"); 1005 ret = -ENOMEM; 1006 goto out; 1007 } 1008 1009 hret = ehea_h_query_ehea_port(port->adapter->handle, 1010 port->logical_port_id, H_PORT_CB0, 1011 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), 1012 cb0); 1013 if (hret != H_SUCCESS) { 1014 ret = -EIO; 1015 goto out_free; 1016 } 1017 1018 /* MAC address */ 1019 port->mac_addr = cb0->port_mac_addr << 16; 1020 1021 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { 1022 ret = -EADDRNOTAVAIL; 1023 goto out_free; 1024 } 1025 1026 /* Port speed */ 1027 switch (cb0->port_speed) { 1028 case H_SPEED_10M_H: 1029 port->port_speed = EHEA_SPEED_10M; 1030 port->full_duplex = 0; 1031 break; 1032 case H_SPEED_10M_F: 1033 port->port_speed = EHEA_SPEED_10M; 1034 port->full_duplex = 1; 1035 break; 1036 case H_SPEED_100M_H: 1037 port->port_speed = EHEA_SPEED_100M; 1038 port->full_duplex = 0; 1039 break; 1040 case H_SPEED_100M_F: 1041 port->port_speed = EHEA_SPEED_100M; 1042 port->full_duplex = 1; 1043 break; 1044 case H_SPEED_1G_F: 1045 port->port_speed = EHEA_SPEED_1G; 1046 port->full_duplex = 1; 1047 break; 1048 case H_SPEED_10G_F: 1049 port->port_speed = EHEA_SPEED_10G; 1050 port->full_duplex = 1; 1051 break; 1052 default: 1053 port->port_speed = 0; 1054 port->full_duplex = 0; 1055 break; 1056 } 1057 1058 port->autoneg = 1; 1059 port->num_mcs = cb0->num_default_qps; 1060 1061 /* Number of default QPs */ 1062 if (use_mcs) 1063 port->num_def_qps = cb0->num_default_qps; 1064 else 1065 port->num_def_qps = 1; 1066 1067 if (!port->num_def_qps) { 1068 ret = -EINVAL; 1069 goto out_free; 1070 } 1071 1072 ret = 0; 1073 out_free: 1074 if (ret || netif_msg_probe(port)) 1075 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); 1076 free_page((unsigned long)cb0); 1077 out: 1078 return ret; 1079 } 1080 1081 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) 1082 { 1083 struct hcp_ehea_port_cb4 *cb4; 1084 u64 hret; 1085 int ret = 0; 1086 1087 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 1088 if (!cb4) { 1089 pr_err("no mem for cb4\n"); 1090 ret = -ENOMEM; 1091 goto out; 1092 } 1093 1094 cb4->port_speed = port_speed; 1095 1096 netif_carrier_off(port->netdev); 1097 1098 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1099 port->logical_port_id, 1100 H_PORT_CB4, H_PORT_CB4_SPEED, cb4); 1101 if (hret == H_SUCCESS) { 1102 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; 1103 1104 hret = ehea_h_query_ehea_port(port->adapter->handle, 1105 port->logical_port_id, 1106 H_PORT_CB4, H_PORT_CB4_SPEED, 1107 cb4); 1108 if (hret == H_SUCCESS) { 1109 switch (cb4->port_speed) { 1110 case H_SPEED_10M_H: 1111 port->port_speed = EHEA_SPEED_10M; 1112 port->full_duplex = 0; 1113 break; 1114 case H_SPEED_10M_F: 1115 port->port_speed = EHEA_SPEED_10M; 1116 port->full_duplex = 1; 1117 break; 1118 case H_SPEED_100M_H: 1119 port->port_speed = EHEA_SPEED_100M; 1120 port->full_duplex = 0; 1121 break; 1122 case H_SPEED_100M_F: 1123 port->port_speed = EHEA_SPEED_100M; 1124 port->full_duplex = 1; 1125 break; 1126 case H_SPEED_1G_F: 1127 port->port_speed = EHEA_SPEED_1G; 1128 port->full_duplex = 1; 1129 break; 1130 case H_SPEED_10G_F: 1131 port->port_speed = EHEA_SPEED_10G; 1132 port->full_duplex = 1; 1133 break; 1134 default: 1135 port->port_speed = 0; 1136 port->full_duplex = 0; 1137 break; 1138 } 1139 } else { 1140 pr_err("Failed sensing port speed\n"); 1141 ret = -EIO; 1142 } 1143 } else { 1144 if (hret == H_AUTHORITY) { 1145 pr_info("Hypervisor denied setting port speed\n"); 1146 ret = -EPERM; 1147 } else { 1148 ret = -EIO; 1149 pr_err("Failed setting port speed\n"); 1150 } 1151 } 1152 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) 1153 netif_carrier_on(port->netdev); 1154 1155 free_page((unsigned long)cb4); 1156 out: 1157 return ret; 1158 } 1159 1160 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) 1161 { 1162 int ret; 1163 u8 ec; 1164 u8 portnum; 1165 struct ehea_port *port; 1166 struct net_device *dev; 1167 1168 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); 1169 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); 1170 port = ehea_get_port(adapter, portnum); 1171 if (!port) { 1172 netdev_err(NULL, "unknown portnum %x\n", portnum); 1173 return; 1174 } 1175 dev = port->netdev; 1176 1177 switch (ec) { 1178 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1179 1180 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1181 if (!netif_carrier_ok(dev)) { 1182 ret = ehea_sense_port_attr(port); 1183 if (ret) { 1184 netdev_err(dev, "failed resensing port attributes\n"); 1185 break; 1186 } 1187 1188 netif_info(port, link, dev, 1189 "Logical port up: %dMbps %s Duplex\n", 1190 port->port_speed, 1191 port->full_duplex == 1 ? 1192 "Full" : "Half"); 1193 1194 netif_carrier_on(dev); 1195 netif_wake_queue(dev); 1196 } 1197 } else 1198 if (netif_carrier_ok(dev)) { 1199 netif_info(port, link, dev, 1200 "Logical port down\n"); 1201 netif_carrier_off(dev); 1202 netif_tx_disable(dev); 1203 } 1204 1205 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1206 port->phy_link = EHEA_PHY_LINK_UP; 1207 netif_info(port, link, dev, 1208 "Physical port up\n"); 1209 if (prop_carrier_state) 1210 netif_carrier_on(dev); 1211 } else { 1212 port->phy_link = EHEA_PHY_LINK_DOWN; 1213 netif_info(port, link, dev, 1214 "Physical port down\n"); 1215 if (prop_carrier_state) 1216 netif_carrier_off(dev); 1217 } 1218 1219 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1220 netdev_info(dev, 1221 "External switch port is primary port\n"); 1222 else 1223 netdev_info(dev, 1224 "External switch port is backup port\n"); 1225 1226 break; 1227 case EHEA_EC_ADAPTER_MALFUNC: 1228 netdev_err(dev, "Adapter malfunction\n"); 1229 break; 1230 case EHEA_EC_PORT_MALFUNC: 1231 netdev_info(dev, "Port malfunction\n"); 1232 netif_carrier_off(dev); 1233 netif_tx_disable(dev); 1234 break; 1235 default: 1236 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1237 break; 1238 } 1239 } 1240 1241 static void ehea_neq_tasklet(unsigned long data) 1242 { 1243 struct ehea_adapter *adapter = (struct ehea_adapter *)data; 1244 struct ehea_eqe *eqe; 1245 u64 event_mask; 1246 1247 eqe = ehea_poll_eq(adapter->neq); 1248 pr_debug("eqe=%p\n", eqe); 1249 1250 while (eqe) { 1251 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1252 ehea_parse_eqe(adapter, eqe->entry); 1253 eqe = ehea_poll_eq(adapter->neq); 1254 pr_debug("next eqe=%p\n", eqe); 1255 } 1256 1257 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1258 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1259 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1260 1261 ehea_h_reset_events(adapter->handle, 1262 adapter->neq->fw_handle, event_mask); 1263 } 1264 1265 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1266 { 1267 struct ehea_adapter *adapter = param; 1268 tasklet_hi_schedule(&adapter->neq_tasklet); 1269 return IRQ_HANDLED; 1270 } 1271 1272 1273 static int ehea_fill_port_res(struct ehea_port_res *pr) 1274 { 1275 int ret; 1276 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1277 1278 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1279 1280 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1281 1282 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1283 1284 return ret; 1285 } 1286 1287 static int ehea_reg_interrupts(struct net_device *dev) 1288 { 1289 struct ehea_port *port = netdev_priv(dev); 1290 struct ehea_port_res *pr; 1291 int i, ret; 1292 1293 1294 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1295 dev->name); 1296 1297 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1298 ehea_qp_aff_irq_handler, 1299 0, port->int_aff_name, port); 1300 if (ret) { 1301 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1302 port->qp_eq->attr.ist1); 1303 goto out_free_qpeq; 1304 } 1305 1306 netif_info(port, ifup, dev, 1307 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1308 port->qp_eq->attr.ist1); 1309 1310 1311 for (i = 0; i < port->num_def_qps; i++) { 1312 pr = &port->port_res[i]; 1313 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1314 "%s-queue%d", dev->name, i); 1315 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1316 ehea_recv_irq_handler, 1317 0, pr->int_send_name, pr); 1318 if (ret) { 1319 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1320 i, pr->eq->attr.ist1); 1321 goto out_free_req; 1322 } 1323 netif_info(port, ifup, dev, 1324 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1325 pr->eq->attr.ist1, i); 1326 } 1327 out: 1328 return ret; 1329 1330 1331 out_free_req: 1332 while (--i >= 0) { 1333 u32 ist = port->port_res[i].eq->attr.ist1; 1334 ibmebus_free_irq(ist, &port->port_res[i]); 1335 } 1336 1337 out_free_qpeq: 1338 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1339 i = port->num_def_qps; 1340 1341 goto out; 1342 1343 } 1344 1345 static void ehea_free_interrupts(struct net_device *dev) 1346 { 1347 struct ehea_port *port = netdev_priv(dev); 1348 struct ehea_port_res *pr; 1349 int i; 1350 1351 /* send */ 1352 1353 for (i = 0; i < port->num_def_qps; i++) { 1354 pr = &port->port_res[i]; 1355 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1356 netif_info(port, intr, dev, 1357 "free send irq for res %d with handle 0x%X\n", 1358 i, pr->eq->attr.ist1); 1359 } 1360 1361 /* associated events */ 1362 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1363 netif_info(port, intr, dev, 1364 "associated event interrupt for handle 0x%X freed\n", 1365 port->qp_eq->attr.ist1); 1366 } 1367 1368 static int ehea_configure_port(struct ehea_port *port) 1369 { 1370 int ret, i; 1371 u64 hret, mask; 1372 struct hcp_ehea_port_cb0 *cb0; 1373 1374 ret = -ENOMEM; 1375 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1376 if (!cb0) 1377 goto out; 1378 1379 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1380 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1381 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1382 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1383 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1384 PXLY_RC_VLAN_FILTER) 1385 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1386 1387 for (i = 0; i < port->num_mcs; i++) 1388 if (use_mcs) 1389 cb0->default_qpn_arr[i] = 1390 port->port_res[i].qp->init_attr.qp_nr; 1391 else 1392 cb0->default_qpn_arr[i] = 1393 port->port_res[0].qp->init_attr.qp_nr; 1394 1395 if (netif_msg_ifup(port)) 1396 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1397 1398 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1399 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1400 1401 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1402 port->logical_port_id, 1403 H_PORT_CB0, mask, cb0); 1404 ret = -EIO; 1405 if (hret != H_SUCCESS) 1406 goto out_free; 1407 1408 ret = 0; 1409 1410 out_free: 1411 free_page((unsigned long)cb0); 1412 out: 1413 return ret; 1414 } 1415 1416 static int ehea_gen_smrs(struct ehea_port_res *pr) 1417 { 1418 int ret; 1419 struct ehea_adapter *adapter = pr->port->adapter; 1420 1421 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1422 if (ret) 1423 goto out; 1424 1425 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1426 if (ret) 1427 goto out_free; 1428 1429 return 0; 1430 1431 out_free: 1432 ehea_rem_mr(&pr->send_mr); 1433 out: 1434 pr_err("Generating SMRS failed\n"); 1435 return -EIO; 1436 } 1437 1438 static int ehea_rem_smrs(struct ehea_port_res *pr) 1439 { 1440 if ((ehea_rem_mr(&pr->send_mr)) || 1441 (ehea_rem_mr(&pr->recv_mr))) 1442 return -EIO; 1443 else 1444 return 0; 1445 } 1446 1447 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1448 { 1449 int arr_size = sizeof(void *) * max_q_entries; 1450 1451 q_skba->arr = vzalloc(arr_size); 1452 if (!q_skba->arr) 1453 return -ENOMEM; 1454 1455 q_skba->len = max_q_entries; 1456 q_skba->index = 0; 1457 q_skba->os_skbs = 0; 1458 1459 return 0; 1460 } 1461 1462 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1463 struct port_res_cfg *pr_cfg, int queue_token) 1464 { 1465 struct ehea_adapter *adapter = port->adapter; 1466 enum ehea_eq_type eq_type = EHEA_EQ; 1467 struct ehea_qp_init_attr *init_attr = NULL; 1468 int ret = -EIO; 1469 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1470 1471 tx_bytes = pr->tx_bytes; 1472 tx_packets = pr->tx_packets; 1473 rx_bytes = pr->rx_bytes; 1474 rx_packets = pr->rx_packets; 1475 1476 memset(pr, 0, sizeof(struct ehea_port_res)); 1477 1478 pr->tx_bytes = rx_bytes; 1479 pr->tx_packets = tx_packets; 1480 pr->rx_bytes = rx_bytes; 1481 pr->rx_packets = rx_packets; 1482 1483 pr->port = port; 1484 1485 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1486 if (!pr->eq) { 1487 pr_err("create_eq failed (eq)\n"); 1488 goto out_free; 1489 } 1490 1491 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1492 pr->eq->fw_handle, 1493 port->logical_port_id); 1494 if (!pr->recv_cq) { 1495 pr_err("create_cq failed (cq_recv)\n"); 1496 goto out_free; 1497 } 1498 1499 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1500 pr->eq->fw_handle, 1501 port->logical_port_id); 1502 if (!pr->send_cq) { 1503 pr_err("create_cq failed (cq_send)\n"); 1504 goto out_free; 1505 } 1506 1507 if (netif_msg_ifup(port)) 1508 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1509 pr->send_cq->attr.act_nr_of_cqes, 1510 pr->recv_cq->attr.act_nr_of_cqes); 1511 1512 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1513 if (!init_attr) { 1514 ret = -ENOMEM; 1515 pr_err("no mem for ehea_qp_init_attr\n"); 1516 goto out_free; 1517 } 1518 1519 init_attr->low_lat_rq1 = 1; 1520 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1521 init_attr->rq_count = 3; 1522 init_attr->qp_token = queue_token; 1523 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1524 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1525 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1526 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1527 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1528 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1529 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1530 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1531 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1532 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1533 init_attr->port_nr = port->logical_port_id; 1534 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1535 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1536 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1537 1538 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1539 if (!pr->qp) { 1540 pr_err("create_qp failed\n"); 1541 ret = -EIO; 1542 goto out_free; 1543 } 1544 1545 if (netif_msg_ifup(port)) 1546 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", 1547 init_attr->qp_nr, 1548 init_attr->act_nr_send_wqes, 1549 init_attr->act_nr_rwqes_rq1, 1550 init_attr->act_nr_rwqes_rq2, 1551 init_attr->act_nr_rwqes_rq3); 1552 1553 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1554 1555 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1556 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1557 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1558 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1559 if (ret) 1560 goto out_free; 1561 1562 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1563 if (ehea_gen_smrs(pr) != 0) { 1564 ret = -EIO; 1565 goto out_free; 1566 } 1567 1568 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1569 1570 kfree(init_attr); 1571 1572 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); 1573 1574 ret = 0; 1575 goto out; 1576 1577 out_free: 1578 kfree(init_attr); 1579 vfree(pr->sq_skba.arr); 1580 vfree(pr->rq1_skba.arr); 1581 vfree(pr->rq2_skba.arr); 1582 vfree(pr->rq3_skba.arr); 1583 ehea_destroy_qp(pr->qp); 1584 ehea_destroy_cq(pr->send_cq); 1585 ehea_destroy_cq(pr->recv_cq); 1586 ehea_destroy_eq(pr->eq); 1587 out: 1588 return ret; 1589 } 1590 1591 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1592 { 1593 int ret, i; 1594 1595 if (pr->qp) 1596 netif_napi_del(&pr->napi); 1597 1598 ret = ehea_destroy_qp(pr->qp); 1599 1600 if (!ret) { 1601 ehea_destroy_cq(pr->send_cq); 1602 ehea_destroy_cq(pr->recv_cq); 1603 ehea_destroy_eq(pr->eq); 1604 1605 for (i = 0; i < pr->rq1_skba.len; i++) 1606 if (pr->rq1_skba.arr[i]) 1607 dev_kfree_skb(pr->rq1_skba.arr[i]); 1608 1609 for (i = 0; i < pr->rq2_skba.len; i++) 1610 if (pr->rq2_skba.arr[i]) 1611 dev_kfree_skb(pr->rq2_skba.arr[i]); 1612 1613 for (i = 0; i < pr->rq3_skba.len; i++) 1614 if (pr->rq3_skba.arr[i]) 1615 dev_kfree_skb(pr->rq3_skba.arr[i]); 1616 1617 for (i = 0; i < pr->sq_skba.len; i++) 1618 if (pr->sq_skba.arr[i]) 1619 dev_kfree_skb(pr->sq_skba.arr[i]); 1620 1621 vfree(pr->rq1_skba.arr); 1622 vfree(pr->rq2_skba.arr); 1623 vfree(pr->rq3_skba.arr); 1624 vfree(pr->sq_skba.arr); 1625 ret = ehea_rem_smrs(pr); 1626 } 1627 return ret; 1628 } 1629 1630 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1631 u32 lkey) 1632 { 1633 int skb_data_size = skb_headlen(skb); 1634 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1635 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1636 unsigned int immediate_len = SWQE2_MAX_IMM; 1637 1638 swqe->descriptors = 0; 1639 1640 if (skb_is_gso(skb)) { 1641 swqe->tx_control |= EHEA_SWQE_TSO; 1642 swqe->mss = skb_shinfo(skb)->gso_size; 1643 /* 1644 * For TSO packets we only copy the headers into the 1645 * immediate area. 1646 */ 1647 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb); 1648 } 1649 1650 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1651 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1652 swqe->immediate_data_length = immediate_len; 1653 1654 if (skb_data_size > immediate_len) { 1655 sg1entry->l_key = lkey; 1656 sg1entry->len = skb_data_size - immediate_len; 1657 sg1entry->vaddr = 1658 ehea_map_vaddr(skb->data + immediate_len); 1659 swqe->descriptors++; 1660 } 1661 } else { 1662 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1663 swqe->immediate_data_length = skb_data_size; 1664 } 1665 } 1666 1667 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1668 struct ehea_swqe *swqe, u32 lkey) 1669 { 1670 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1671 skb_frag_t *frag; 1672 int nfrags, sg1entry_contains_frag_data, i; 1673 1674 nfrags = skb_shinfo(skb)->nr_frags; 1675 sg1entry = &swqe->u.immdata_desc.sg_entry; 1676 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1677 sg1entry_contains_frag_data = 0; 1678 1679 write_swqe2_immediate(skb, swqe, lkey); 1680 1681 /* write descriptors */ 1682 if (nfrags > 0) { 1683 if (swqe->descriptors == 0) { 1684 /* sg1entry not yet used */ 1685 frag = &skb_shinfo(skb)->frags[0]; 1686 1687 /* copy sg1entry data */ 1688 sg1entry->l_key = lkey; 1689 sg1entry->len = skb_frag_size(frag); 1690 sg1entry->vaddr = 1691 ehea_map_vaddr(skb_frag_address(frag)); 1692 swqe->descriptors++; 1693 sg1entry_contains_frag_data = 1; 1694 } 1695 1696 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1697 1698 frag = &skb_shinfo(skb)->frags[i]; 1699 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1700 1701 sgentry->l_key = lkey; 1702 sgentry->len = skb_frag_size(frag); 1703 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1704 swqe->descriptors++; 1705 } 1706 } 1707 } 1708 1709 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1710 { 1711 int ret = 0; 1712 u64 hret; 1713 u8 reg_type; 1714 1715 /* De/Register untagged packets */ 1716 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1717 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1718 port->logical_port_id, 1719 reg_type, port->mac_addr, 0, hcallid); 1720 if (hret != H_SUCCESS) { 1721 pr_err("%sregistering bc address failed (tagged)\n", 1722 hcallid == H_REG_BCMC ? "" : "de"); 1723 ret = -EIO; 1724 goto out_herr; 1725 } 1726 1727 /* De/Register VLAN packets */ 1728 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1729 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1730 port->logical_port_id, 1731 reg_type, port->mac_addr, 0, hcallid); 1732 if (hret != H_SUCCESS) { 1733 pr_err("%sregistering bc address failed (vlan)\n", 1734 hcallid == H_REG_BCMC ? "" : "de"); 1735 ret = -EIO; 1736 } 1737 out_herr: 1738 return ret; 1739 } 1740 1741 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1742 { 1743 struct ehea_port *port = netdev_priv(dev); 1744 struct sockaddr *mac_addr = sa; 1745 struct hcp_ehea_port_cb0 *cb0; 1746 int ret; 1747 u64 hret; 1748 1749 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1750 ret = -EADDRNOTAVAIL; 1751 goto out; 1752 } 1753 1754 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1755 if (!cb0) { 1756 pr_err("no mem for cb0\n"); 1757 ret = -ENOMEM; 1758 goto out; 1759 } 1760 1761 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1762 1763 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1764 1765 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1766 port->logical_port_id, H_PORT_CB0, 1767 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1768 if (hret != H_SUCCESS) { 1769 ret = -EIO; 1770 goto out_free; 1771 } 1772 1773 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); 1774 1775 /* Deregister old MAC in pHYP */ 1776 if (port->state == EHEA_PORT_UP) { 1777 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1778 if (ret) 1779 goto out_upregs; 1780 } 1781 1782 port->mac_addr = cb0->port_mac_addr << 16; 1783 1784 /* Register new MAC in pHYP */ 1785 if (port->state == EHEA_PORT_UP) { 1786 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1787 if (ret) 1788 goto out_upregs; 1789 } 1790 1791 ret = 0; 1792 1793 out_upregs: 1794 ehea_update_bcmc_registrations(); 1795 out_free: 1796 free_page((unsigned long)cb0); 1797 out: 1798 return ret; 1799 } 1800 1801 static void ehea_promiscuous_error(u64 hret, int enable) 1802 { 1803 if (hret == H_AUTHORITY) 1804 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1805 enable == 1 ? "en" : "dis"); 1806 else 1807 pr_err("failed %sabling promiscuous mode\n", 1808 enable == 1 ? "en" : "dis"); 1809 } 1810 1811 static void ehea_promiscuous(struct net_device *dev, int enable) 1812 { 1813 struct ehea_port *port = netdev_priv(dev); 1814 struct hcp_ehea_port_cb7 *cb7; 1815 u64 hret; 1816 1817 if (enable == port->promisc) 1818 return; 1819 1820 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1821 if (!cb7) { 1822 pr_err("no mem for cb7\n"); 1823 goto out; 1824 } 1825 1826 /* Modify Pxs_DUCQPN in CB7 */ 1827 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1828 1829 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1830 port->logical_port_id, 1831 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1832 if (hret) { 1833 ehea_promiscuous_error(hret, enable); 1834 goto out; 1835 } 1836 1837 port->promisc = enable; 1838 out: 1839 free_page((unsigned long)cb7); 1840 } 1841 1842 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1843 u32 hcallid) 1844 { 1845 u64 hret; 1846 u8 reg_type; 1847 1848 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; 1849 if (mc_mac_addr == 0) 1850 reg_type |= EHEA_BCMC_SCOPE_ALL; 1851 1852 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1853 port->logical_port_id, 1854 reg_type, mc_mac_addr, 0, hcallid); 1855 if (hret) 1856 goto out; 1857 1858 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL; 1859 if (mc_mac_addr == 0) 1860 reg_type |= EHEA_BCMC_SCOPE_ALL; 1861 1862 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1863 port->logical_port_id, 1864 reg_type, mc_mac_addr, 0, hcallid); 1865 out: 1866 return hret; 1867 } 1868 1869 static int ehea_drop_multicast_list(struct net_device *dev) 1870 { 1871 struct ehea_port *port = netdev_priv(dev); 1872 struct ehea_mc_list *mc_entry = port->mc_list; 1873 struct list_head *pos; 1874 struct list_head *temp; 1875 int ret = 0; 1876 u64 hret; 1877 1878 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1879 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1880 1881 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1882 H_DEREG_BCMC); 1883 if (hret) { 1884 pr_err("failed deregistering mcast MAC\n"); 1885 ret = -EIO; 1886 } 1887 1888 list_del(pos); 1889 kfree(mc_entry); 1890 } 1891 return ret; 1892 } 1893 1894 static void ehea_allmulti(struct net_device *dev, int enable) 1895 { 1896 struct ehea_port *port = netdev_priv(dev); 1897 u64 hret; 1898 1899 if (!port->allmulti) { 1900 if (enable) { 1901 /* Enable ALLMULTI */ 1902 ehea_drop_multicast_list(dev); 1903 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1904 if (!hret) 1905 port->allmulti = 1; 1906 else 1907 netdev_err(dev, 1908 "failed enabling IFF_ALLMULTI\n"); 1909 } 1910 } else { 1911 if (!enable) { 1912 /* Disable ALLMULTI */ 1913 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1914 if (!hret) 1915 port->allmulti = 0; 1916 else 1917 netdev_err(dev, 1918 "failed disabling IFF_ALLMULTI\n"); 1919 } 1920 } 1921 } 1922 1923 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1924 { 1925 struct ehea_mc_list *ehea_mcl_entry; 1926 u64 hret; 1927 1928 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1929 if (!ehea_mcl_entry) 1930 return; 1931 1932 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1933 1934 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1935 1936 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1937 H_REG_BCMC); 1938 if (!hret) 1939 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1940 else { 1941 pr_err("failed registering mcast MAC\n"); 1942 kfree(ehea_mcl_entry); 1943 } 1944 } 1945 1946 static void ehea_set_multicast_list(struct net_device *dev) 1947 { 1948 struct ehea_port *port = netdev_priv(dev); 1949 struct netdev_hw_addr *ha; 1950 int ret; 1951 1952 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC)); 1953 1954 if (dev->flags & IFF_ALLMULTI) { 1955 ehea_allmulti(dev, 1); 1956 goto out; 1957 } 1958 ehea_allmulti(dev, 0); 1959 1960 if (!netdev_mc_empty(dev)) { 1961 ret = ehea_drop_multicast_list(dev); 1962 if (ret) { 1963 /* Dropping the current multicast list failed. 1964 * Enabling ALL_MULTI is the best we can do. 1965 */ 1966 ehea_allmulti(dev, 1); 1967 } 1968 1969 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1970 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1971 port->adapter->max_mc_mac); 1972 goto out; 1973 } 1974 1975 netdev_for_each_mc_addr(ha, dev) 1976 ehea_add_multicast_entry(port, ha->addr); 1977 1978 } 1979 out: 1980 ehea_update_bcmc_registrations(); 1981 } 1982 1983 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1984 { 1985 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1986 1987 if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 1988 return; 1989 1990 if (skb->ip_summed == CHECKSUM_PARTIAL) 1991 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 1992 1993 swqe->ip_start = skb_network_offset(skb); 1994 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 1995 1996 switch (ip_hdr(skb)->protocol) { 1997 case IPPROTO_UDP: 1998 if (skb->ip_summed == CHECKSUM_PARTIAL) 1999 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2000 2001 swqe->tcp_offset = swqe->ip_end + 1 + 2002 offsetof(struct udphdr, check); 2003 break; 2004 2005 case IPPROTO_TCP: 2006 if (skb->ip_summed == CHECKSUM_PARTIAL) 2007 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2008 2009 swqe->tcp_offset = swqe->ip_end + 1 + 2010 offsetof(struct tcphdr, check); 2011 break; 2012 } 2013 } 2014 2015 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 2016 struct ehea_swqe *swqe, u32 lkey) 2017 { 2018 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 2019 2020 xmit_common(skb, swqe); 2021 2022 write_swqe2_data(skb, dev, swqe, lkey); 2023 } 2024 2025 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 2026 struct ehea_swqe *swqe) 2027 { 2028 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2029 2030 xmit_common(skb, swqe); 2031 2032 if (!skb->data_len) 2033 skb_copy_from_linear_data(skb, imm_data, skb->len); 2034 else 2035 skb_copy_bits(skb, 0, imm_data, skb->len); 2036 2037 swqe->immediate_data_length = skb->len; 2038 dev_consume_skb_any(skb); 2039 } 2040 2041 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2042 { 2043 struct ehea_port *port = netdev_priv(dev); 2044 struct ehea_swqe *swqe; 2045 u32 lkey; 2046 int swqe_index; 2047 struct ehea_port_res *pr; 2048 struct netdev_queue *txq; 2049 2050 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2051 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2052 2053 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2054 memset(swqe, 0, SWQE_HEADER_SIZE); 2055 atomic_dec(&pr->swqe_avail); 2056 2057 if (skb_vlan_tag_present(skb)) { 2058 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2059 swqe->vlan_tag = skb_vlan_tag_get(skb); 2060 } 2061 2062 pr->tx_packets++; 2063 pr->tx_bytes += skb->len; 2064 2065 if (skb->len <= SWQE3_MAX_IMM) { 2066 u32 sig_iv = port->sig_comp_iv; 2067 u32 swqe_num = pr->swqe_id_counter; 2068 ehea_xmit3(skb, dev, swqe); 2069 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2070 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2071 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2072 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2073 sig_iv); 2074 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2075 pr->swqe_ll_count = 0; 2076 } else 2077 pr->swqe_ll_count += 1; 2078 } else { 2079 swqe->wr_id = 2080 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2081 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2082 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2083 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2084 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2085 2086 pr->sq_skba.index++; 2087 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2088 2089 lkey = pr->send_mr.lkey; 2090 ehea_xmit2(skb, dev, swqe, lkey); 2091 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2092 } 2093 pr->swqe_id_counter += 1; 2094 2095 netif_info(port, tx_queued, dev, 2096 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2097 if (netif_msg_tx_queued(port)) 2098 ehea_dump(swqe, 512, "swqe"); 2099 2100 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2101 netif_tx_stop_queue(txq); 2102 swqe->tx_control |= EHEA_SWQE_PURGE; 2103 } 2104 2105 ehea_post_swqe(pr->qp, swqe); 2106 2107 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2108 pr->p_stats.queue_stopped++; 2109 netif_tx_stop_queue(txq); 2110 } 2111 2112 return NETDEV_TX_OK; 2113 } 2114 2115 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2116 { 2117 struct ehea_port *port = netdev_priv(dev); 2118 struct ehea_adapter *adapter = port->adapter; 2119 struct hcp_ehea_port_cb1 *cb1; 2120 int index; 2121 u64 hret; 2122 int err = 0; 2123 2124 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2125 if (!cb1) { 2126 pr_err("no mem for cb1\n"); 2127 err = -ENOMEM; 2128 goto out; 2129 } 2130 2131 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2132 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2133 if (hret != H_SUCCESS) { 2134 pr_err("query_ehea_port failed\n"); 2135 err = -EINVAL; 2136 goto out; 2137 } 2138 2139 index = (vid / 64); 2140 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2141 2142 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2143 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2144 if (hret != H_SUCCESS) { 2145 pr_err("modify_ehea_port failed\n"); 2146 err = -EINVAL; 2147 } 2148 out: 2149 free_page((unsigned long)cb1); 2150 return err; 2151 } 2152 2153 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2154 { 2155 struct ehea_port *port = netdev_priv(dev); 2156 struct ehea_adapter *adapter = port->adapter; 2157 struct hcp_ehea_port_cb1 *cb1; 2158 int index; 2159 u64 hret; 2160 int err = 0; 2161 2162 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2163 if (!cb1) { 2164 pr_err("no mem for cb1\n"); 2165 err = -ENOMEM; 2166 goto out; 2167 } 2168 2169 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2170 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2171 if (hret != H_SUCCESS) { 2172 pr_err("query_ehea_port failed\n"); 2173 err = -EINVAL; 2174 goto out; 2175 } 2176 2177 index = (vid / 64); 2178 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2179 2180 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2181 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2182 if (hret != H_SUCCESS) { 2183 pr_err("modify_ehea_port failed\n"); 2184 err = -EINVAL; 2185 } 2186 out: 2187 free_page((unsigned long)cb1); 2188 return err; 2189 } 2190 2191 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2192 { 2193 int ret = -EIO; 2194 u64 hret; 2195 u16 dummy16 = 0; 2196 u64 dummy64 = 0; 2197 struct hcp_modify_qp_cb0 *cb0; 2198 2199 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2200 if (!cb0) { 2201 ret = -ENOMEM; 2202 goto out; 2203 } 2204 2205 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2206 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2207 if (hret != H_SUCCESS) { 2208 pr_err("query_ehea_qp failed (1)\n"); 2209 goto out; 2210 } 2211 2212 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2213 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2214 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2215 &dummy64, &dummy64, &dummy16, &dummy16); 2216 if (hret != H_SUCCESS) { 2217 pr_err("modify_ehea_qp failed (1)\n"); 2218 goto out; 2219 } 2220 2221 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2222 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2223 if (hret != H_SUCCESS) { 2224 pr_err("query_ehea_qp failed (2)\n"); 2225 goto out; 2226 } 2227 2228 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2229 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2230 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2231 &dummy64, &dummy64, &dummy16, &dummy16); 2232 if (hret != H_SUCCESS) { 2233 pr_err("modify_ehea_qp failed (2)\n"); 2234 goto out; 2235 } 2236 2237 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2238 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2239 if (hret != H_SUCCESS) { 2240 pr_err("query_ehea_qp failed (3)\n"); 2241 goto out; 2242 } 2243 2244 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2245 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2246 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2247 &dummy64, &dummy64, &dummy16, &dummy16); 2248 if (hret != H_SUCCESS) { 2249 pr_err("modify_ehea_qp failed (3)\n"); 2250 goto out; 2251 } 2252 2253 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2254 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2255 if (hret != H_SUCCESS) { 2256 pr_err("query_ehea_qp failed (4)\n"); 2257 goto out; 2258 } 2259 2260 ret = 0; 2261 out: 2262 free_page((unsigned long)cb0); 2263 return ret; 2264 } 2265 2266 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2267 { 2268 int ret, i; 2269 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2270 enum ehea_eq_type eq_type = EHEA_EQ; 2271 2272 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2273 EHEA_MAX_ENTRIES_EQ, 1); 2274 if (!port->qp_eq) { 2275 ret = -EINVAL; 2276 pr_err("ehea_create_eq failed (qp_eq)\n"); 2277 goto out_kill_eq; 2278 } 2279 2280 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2281 pr_cfg.max_entries_scq = sq_entries * 2; 2282 pr_cfg.max_entries_sq = sq_entries; 2283 pr_cfg.max_entries_rq1 = rq1_entries; 2284 pr_cfg.max_entries_rq2 = rq2_entries; 2285 pr_cfg.max_entries_rq3 = rq3_entries; 2286 2287 pr_cfg_small_rx.max_entries_rcq = 1; 2288 pr_cfg_small_rx.max_entries_scq = sq_entries; 2289 pr_cfg_small_rx.max_entries_sq = sq_entries; 2290 pr_cfg_small_rx.max_entries_rq1 = 1; 2291 pr_cfg_small_rx.max_entries_rq2 = 1; 2292 pr_cfg_small_rx.max_entries_rq3 = 1; 2293 2294 for (i = 0; i < def_qps; i++) { 2295 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2296 if (ret) 2297 goto out_clean_pr; 2298 } 2299 for (i = def_qps; i < def_qps; i++) { 2300 ret = ehea_init_port_res(port, &port->port_res[i], 2301 &pr_cfg_small_rx, i); 2302 if (ret) 2303 goto out_clean_pr; 2304 } 2305 2306 return 0; 2307 2308 out_clean_pr: 2309 while (--i >= 0) 2310 ehea_clean_portres(port, &port->port_res[i]); 2311 2312 out_kill_eq: 2313 ehea_destroy_eq(port->qp_eq); 2314 return ret; 2315 } 2316 2317 static int ehea_clean_all_portres(struct ehea_port *port) 2318 { 2319 int ret = 0; 2320 int i; 2321 2322 for (i = 0; i < port->num_def_qps; i++) 2323 ret |= ehea_clean_portres(port, &port->port_res[i]); 2324 2325 ret |= ehea_destroy_eq(port->qp_eq); 2326 2327 return ret; 2328 } 2329 2330 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2331 { 2332 if (adapter->active_ports) 2333 return; 2334 2335 ehea_rem_mr(&adapter->mr); 2336 } 2337 2338 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2339 { 2340 if (adapter->active_ports) 2341 return 0; 2342 2343 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2344 } 2345 2346 static int ehea_up(struct net_device *dev) 2347 { 2348 int ret, i; 2349 struct ehea_port *port = netdev_priv(dev); 2350 2351 if (port->state == EHEA_PORT_UP) 2352 return 0; 2353 2354 ret = ehea_port_res_setup(port, port->num_def_qps); 2355 if (ret) { 2356 netdev_err(dev, "port_res_failed\n"); 2357 goto out; 2358 } 2359 2360 /* Set default QP for this port */ 2361 ret = ehea_configure_port(port); 2362 if (ret) { 2363 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2364 goto out_clean_pr; 2365 } 2366 2367 ret = ehea_reg_interrupts(dev); 2368 if (ret) { 2369 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2370 goto out_clean_pr; 2371 } 2372 2373 for (i = 0; i < port->num_def_qps; i++) { 2374 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2375 if (ret) { 2376 netdev_err(dev, "activate_qp failed\n"); 2377 goto out_free_irqs; 2378 } 2379 } 2380 2381 for (i = 0; i < port->num_def_qps; i++) { 2382 ret = ehea_fill_port_res(&port->port_res[i]); 2383 if (ret) { 2384 netdev_err(dev, "out_free_irqs\n"); 2385 goto out_free_irqs; 2386 } 2387 } 2388 2389 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2390 if (ret) { 2391 ret = -EIO; 2392 goto out_free_irqs; 2393 } 2394 2395 port->state = EHEA_PORT_UP; 2396 2397 ret = 0; 2398 goto out; 2399 2400 out_free_irqs: 2401 ehea_free_interrupts(dev); 2402 2403 out_clean_pr: 2404 ehea_clean_all_portres(port); 2405 out: 2406 if (ret) 2407 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2408 2409 ehea_update_bcmc_registrations(); 2410 ehea_update_firmware_handles(); 2411 2412 return ret; 2413 } 2414 2415 static void port_napi_disable(struct ehea_port *port) 2416 { 2417 int i; 2418 2419 for (i = 0; i < port->num_def_qps; i++) 2420 napi_disable(&port->port_res[i].napi); 2421 } 2422 2423 static void port_napi_enable(struct ehea_port *port) 2424 { 2425 int i; 2426 2427 for (i = 0; i < port->num_def_qps; i++) 2428 napi_enable(&port->port_res[i].napi); 2429 } 2430 2431 static int ehea_open(struct net_device *dev) 2432 { 2433 int ret; 2434 struct ehea_port *port = netdev_priv(dev); 2435 2436 mutex_lock(&port->port_lock); 2437 2438 netif_info(port, ifup, dev, "enabling port\n"); 2439 2440 netif_carrier_off(dev); 2441 2442 ret = ehea_up(dev); 2443 if (!ret) { 2444 port_napi_enable(port); 2445 netif_tx_start_all_queues(dev); 2446 } 2447 2448 mutex_unlock(&port->port_lock); 2449 schedule_delayed_work(&port->stats_work, 2450 round_jiffies_relative(msecs_to_jiffies(1000))); 2451 2452 return ret; 2453 } 2454 2455 static int ehea_down(struct net_device *dev) 2456 { 2457 int ret; 2458 struct ehea_port *port = netdev_priv(dev); 2459 2460 if (port->state == EHEA_PORT_DOWN) 2461 return 0; 2462 2463 ehea_drop_multicast_list(dev); 2464 ehea_allmulti(dev, 0); 2465 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2466 2467 ehea_free_interrupts(dev); 2468 2469 port->state = EHEA_PORT_DOWN; 2470 2471 ehea_update_bcmc_registrations(); 2472 2473 ret = ehea_clean_all_portres(port); 2474 if (ret) 2475 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2476 2477 ehea_update_firmware_handles(); 2478 2479 return ret; 2480 } 2481 2482 static int ehea_stop(struct net_device *dev) 2483 { 2484 int ret; 2485 struct ehea_port *port = netdev_priv(dev); 2486 2487 netif_info(port, ifdown, dev, "disabling port\n"); 2488 2489 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2490 cancel_work_sync(&port->reset_task); 2491 cancel_delayed_work_sync(&port->stats_work); 2492 mutex_lock(&port->port_lock); 2493 netif_tx_stop_all_queues(dev); 2494 port_napi_disable(port); 2495 ret = ehea_down(dev); 2496 mutex_unlock(&port->port_lock); 2497 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2498 return ret; 2499 } 2500 2501 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2502 { 2503 struct ehea_qp qp = *orig_qp; 2504 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2505 struct ehea_swqe *swqe; 2506 int wqe_index; 2507 int i; 2508 2509 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2510 swqe = ehea_get_swqe(&qp, &wqe_index); 2511 swqe->tx_control |= EHEA_SWQE_PURGE; 2512 } 2513 } 2514 2515 static void ehea_flush_sq(struct ehea_port *port) 2516 { 2517 int i; 2518 2519 for (i = 0; i < port->num_def_qps; i++) { 2520 struct ehea_port_res *pr = &port->port_res[i]; 2521 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2522 int ret; 2523 2524 ret = wait_event_timeout(port->swqe_avail_wq, 2525 atomic_read(&pr->swqe_avail) >= swqe_max, 2526 msecs_to_jiffies(100)); 2527 2528 if (!ret) { 2529 pr_err("WARNING: sq not flushed completely\n"); 2530 break; 2531 } 2532 } 2533 } 2534 2535 static int ehea_stop_qps(struct net_device *dev) 2536 { 2537 struct ehea_port *port = netdev_priv(dev); 2538 struct ehea_adapter *adapter = port->adapter; 2539 struct hcp_modify_qp_cb0 *cb0; 2540 int ret = -EIO; 2541 int dret; 2542 int i; 2543 u64 hret; 2544 u64 dummy64 = 0; 2545 u16 dummy16 = 0; 2546 2547 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2548 if (!cb0) { 2549 ret = -ENOMEM; 2550 goto out; 2551 } 2552 2553 for (i = 0; i < (port->num_def_qps); i++) { 2554 struct ehea_port_res *pr = &port->port_res[i]; 2555 struct ehea_qp *qp = pr->qp; 2556 2557 /* Purge send queue */ 2558 ehea_purge_sq(qp); 2559 2560 /* Disable queue pair */ 2561 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2562 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2563 cb0); 2564 if (hret != H_SUCCESS) { 2565 pr_err("query_ehea_qp failed (1)\n"); 2566 goto out; 2567 } 2568 2569 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2570 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2571 2572 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2573 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2574 1), cb0, &dummy64, 2575 &dummy64, &dummy16, &dummy16); 2576 if (hret != H_SUCCESS) { 2577 pr_err("modify_ehea_qp failed (1)\n"); 2578 goto out; 2579 } 2580 2581 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2582 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2583 cb0); 2584 if (hret != H_SUCCESS) { 2585 pr_err("query_ehea_qp failed (2)\n"); 2586 goto out; 2587 } 2588 2589 /* deregister shared memory regions */ 2590 dret = ehea_rem_smrs(pr); 2591 if (dret) { 2592 pr_err("unreg shared memory region failed\n"); 2593 goto out; 2594 } 2595 } 2596 2597 ret = 0; 2598 out: 2599 free_page((unsigned long)cb0); 2600 2601 return ret; 2602 } 2603 2604 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2605 { 2606 struct ehea_qp qp = *orig_qp; 2607 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2608 struct ehea_rwqe *rwqe; 2609 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2610 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2611 struct sk_buff *skb; 2612 u32 lkey = pr->recv_mr.lkey; 2613 2614 2615 int i; 2616 int index; 2617 2618 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2619 rwqe = ehea_get_next_rwqe(&qp, 2); 2620 rwqe->sg_list[0].l_key = lkey; 2621 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2622 skb = skba_rq2[index]; 2623 if (skb) 2624 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2625 } 2626 2627 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2628 rwqe = ehea_get_next_rwqe(&qp, 3); 2629 rwqe->sg_list[0].l_key = lkey; 2630 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2631 skb = skba_rq3[index]; 2632 if (skb) 2633 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2634 } 2635 } 2636 2637 static int ehea_restart_qps(struct net_device *dev) 2638 { 2639 struct ehea_port *port = netdev_priv(dev); 2640 struct ehea_adapter *adapter = port->adapter; 2641 int ret = 0; 2642 int i; 2643 2644 struct hcp_modify_qp_cb0 *cb0; 2645 u64 hret; 2646 u64 dummy64 = 0; 2647 u16 dummy16 = 0; 2648 2649 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2650 if (!cb0) { 2651 ret = -ENOMEM; 2652 goto out; 2653 } 2654 2655 for (i = 0; i < (port->num_def_qps); i++) { 2656 struct ehea_port_res *pr = &port->port_res[i]; 2657 struct ehea_qp *qp = pr->qp; 2658 2659 ret = ehea_gen_smrs(pr); 2660 if (ret) { 2661 netdev_err(dev, "creation of shared memory regions failed\n"); 2662 goto out; 2663 } 2664 2665 ehea_update_rqs(qp, pr); 2666 2667 /* Enable queue pair */ 2668 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2669 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2670 cb0); 2671 if (hret != H_SUCCESS) { 2672 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2673 goto out; 2674 } 2675 2676 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2677 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2678 2679 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2680 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2681 1), cb0, &dummy64, 2682 &dummy64, &dummy16, &dummy16); 2683 if (hret != H_SUCCESS) { 2684 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2685 goto out; 2686 } 2687 2688 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2689 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2690 cb0); 2691 if (hret != H_SUCCESS) { 2692 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2693 goto out; 2694 } 2695 2696 /* refill entire queue */ 2697 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2698 ehea_refill_rq2(pr, 0); 2699 ehea_refill_rq3(pr, 0); 2700 } 2701 out: 2702 free_page((unsigned long)cb0); 2703 2704 return ret; 2705 } 2706 2707 static void ehea_reset_port(struct work_struct *work) 2708 { 2709 int ret; 2710 struct ehea_port *port = 2711 container_of(work, struct ehea_port, reset_task); 2712 struct net_device *dev = port->netdev; 2713 2714 mutex_lock(&dlpar_mem_lock); 2715 port->resets++; 2716 mutex_lock(&port->port_lock); 2717 netif_tx_disable(dev); 2718 2719 port_napi_disable(port); 2720 2721 ehea_down(dev); 2722 2723 ret = ehea_up(dev); 2724 if (ret) 2725 goto out; 2726 2727 ehea_set_multicast_list(dev); 2728 2729 netif_info(port, timer, dev, "reset successful\n"); 2730 2731 port_napi_enable(port); 2732 2733 netif_tx_wake_all_queues(dev); 2734 out: 2735 mutex_unlock(&port->port_lock); 2736 mutex_unlock(&dlpar_mem_lock); 2737 } 2738 2739 static void ehea_rereg_mrs(void) 2740 { 2741 int ret, i; 2742 struct ehea_adapter *adapter; 2743 2744 pr_info("LPAR memory changed - re-initializing driver\n"); 2745 2746 list_for_each_entry(adapter, &adapter_list, list) 2747 if (adapter->active_ports) { 2748 /* Shutdown all ports */ 2749 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2750 struct ehea_port *port = adapter->port[i]; 2751 struct net_device *dev; 2752 2753 if (!port) 2754 continue; 2755 2756 dev = port->netdev; 2757 2758 if (dev->flags & IFF_UP) { 2759 mutex_lock(&port->port_lock); 2760 netif_tx_disable(dev); 2761 ehea_flush_sq(port); 2762 ret = ehea_stop_qps(dev); 2763 if (ret) { 2764 mutex_unlock(&port->port_lock); 2765 goto out; 2766 } 2767 port_napi_disable(port); 2768 mutex_unlock(&port->port_lock); 2769 } 2770 reset_sq_restart_flag(port); 2771 } 2772 2773 /* Unregister old memory region */ 2774 ret = ehea_rem_mr(&adapter->mr); 2775 if (ret) { 2776 pr_err("unregister MR failed - driver inoperable!\n"); 2777 goto out; 2778 } 2779 } 2780 2781 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2782 2783 list_for_each_entry(adapter, &adapter_list, list) 2784 if (adapter->active_ports) { 2785 /* Register new memory region */ 2786 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2787 if (ret) { 2788 pr_err("register MR failed - driver inoperable!\n"); 2789 goto out; 2790 } 2791 2792 /* Restart all ports */ 2793 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2794 struct ehea_port *port = adapter->port[i]; 2795 2796 if (port) { 2797 struct net_device *dev = port->netdev; 2798 2799 if (dev->flags & IFF_UP) { 2800 mutex_lock(&port->port_lock); 2801 ret = ehea_restart_qps(dev); 2802 if (!ret) { 2803 check_sqs(port); 2804 port_napi_enable(port); 2805 netif_tx_wake_all_queues(dev); 2806 } else { 2807 netdev_err(dev, "Unable to restart QPS\n"); 2808 } 2809 mutex_unlock(&port->port_lock); 2810 } 2811 } 2812 } 2813 } 2814 pr_info("re-initializing driver complete\n"); 2815 out: 2816 return; 2817 } 2818 2819 static void ehea_tx_watchdog(struct net_device *dev) 2820 { 2821 struct ehea_port *port = netdev_priv(dev); 2822 2823 if (netif_carrier_ok(dev) && 2824 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2825 ehea_schedule_port_reset(port); 2826 } 2827 2828 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2829 { 2830 struct hcp_query_ehea *cb; 2831 u64 hret; 2832 int ret; 2833 2834 cb = (void *)get_zeroed_page(GFP_KERNEL); 2835 if (!cb) { 2836 ret = -ENOMEM; 2837 goto out; 2838 } 2839 2840 hret = ehea_h_query_ehea(adapter->handle, cb); 2841 2842 if (hret != H_SUCCESS) { 2843 ret = -EIO; 2844 goto out_herr; 2845 } 2846 2847 adapter->max_mc_mac = cb->max_mc_mac - 1; 2848 ret = 0; 2849 2850 out_herr: 2851 free_page((unsigned long)cb); 2852 out: 2853 return ret; 2854 } 2855 2856 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2857 { 2858 struct hcp_ehea_port_cb4 *cb4; 2859 u64 hret; 2860 int ret = 0; 2861 2862 *jumbo = 0; 2863 2864 /* (Try to) enable *jumbo frames */ 2865 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2866 if (!cb4) { 2867 pr_err("no mem for cb4\n"); 2868 ret = -ENOMEM; 2869 goto out; 2870 } else { 2871 hret = ehea_h_query_ehea_port(port->adapter->handle, 2872 port->logical_port_id, 2873 H_PORT_CB4, 2874 H_PORT_CB4_JUMBO, cb4); 2875 if (hret == H_SUCCESS) { 2876 if (cb4->jumbo_frame) 2877 *jumbo = 1; 2878 else { 2879 cb4->jumbo_frame = 1; 2880 hret = ehea_h_modify_ehea_port(port->adapter-> 2881 handle, 2882 port-> 2883 logical_port_id, 2884 H_PORT_CB4, 2885 H_PORT_CB4_JUMBO, 2886 cb4); 2887 if (hret == H_SUCCESS) 2888 *jumbo = 1; 2889 } 2890 } else 2891 ret = -EINVAL; 2892 2893 free_page((unsigned long)cb4); 2894 } 2895 out: 2896 return ret; 2897 } 2898 2899 static ssize_t ehea_show_port_id(struct device *dev, 2900 struct device_attribute *attr, char *buf) 2901 { 2902 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2903 return sprintf(buf, "%d", port->logical_port_id); 2904 } 2905 2906 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id, 2907 NULL); 2908 2909 static void logical_port_release(struct device *dev) 2910 { 2911 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2912 of_node_put(port->ofdev.dev.of_node); 2913 } 2914 2915 static struct device *ehea_register_port(struct ehea_port *port, 2916 struct device_node *dn) 2917 { 2918 int ret; 2919 2920 port->ofdev.dev.of_node = of_node_get(dn); 2921 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2922 port->ofdev.dev.bus = &ibmebus_bus_type; 2923 2924 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2925 port->ofdev.dev.release = logical_port_release; 2926 2927 ret = of_device_register(&port->ofdev); 2928 if (ret) { 2929 pr_err("failed to register device. ret=%d\n", ret); 2930 goto out; 2931 } 2932 2933 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2934 if (ret) { 2935 pr_err("failed to register attributes, ret=%d\n", ret); 2936 goto out_unreg_of_dev; 2937 } 2938 2939 return &port->ofdev.dev; 2940 2941 out_unreg_of_dev: 2942 of_device_unregister(&port->ofdev); 2943 out: 2944 return NULL; 2945 } 2946 2947 static void ehea_unregister_port(struct ehea_port *port) 2948 { 2949 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2950 of_device_unregister(&port->ofdev); 2951 } 2952 2953 static const struct net_device_ops ehea_netdev_ops = { 2954 .ndo_open = ehea_open, 2955 .ndo_stop = ehea_stop, 2956 .ndo_start_xmit = ehea_start_xmit, 2957 #ifdef CONFIG_NET_POLL_CONTROLLER 2958 .ndo_poll_controller = ehea_netpoll, 2959 #endif 2960 .ndo_get_stats64 = ehea_get_stats64, 2961 .ndo_set_mac_address = ehea_set_mac_addr, 2962 .ndo_validate_addr = eth_validate_addr, 2963 .ndo_set_rx_mode = ehea_set_multicast_list, 2964 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2965 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2966 .ndo_tx_timeout = ehea_tx_watchdog, 2967 }; 2968 2969 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2970 u32 logical_port_id, 2971 struct device_node *dn) 2972 { 2973 int ret; 2974 struct net_device *dev; 2975 struct ehea_port *port; 2976 struct device *port_dev; 2977 int jumbo; 2978 2979 /* allocate memory for the port structures */ 2980 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2981 2982 if (!dev) { 2983 ret = -ENOMEM; 2984 goto out_err; 2985 } 2986 2987 port = netdev_priv(dev); 2988 2989 mutex_init(&port->port_lock); 2990 port->state = EHEA_PORT_DOWN; 2991 port->sig_comp_iv = sq_entries / 10; 2992 2993 port->adapter = adapter; 2994 port->netdev = dev; 2995 port->logical_port_id = logical_port_id; 2996 2997 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 2998 2999 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 3000 if (!port->mc_list) { 3001 ret = -ENOMEM; 3002 goto out_free_ethdev; 3003 } 3004 3005 INIT_LIST_HEAD(&port->mc_list->list); 3006 3007 ret = ehea_sense_port_attr(port); 3008 if (ret) 3009 goto out_free_mc_list; 3010 3011 netif_set_real_num_rx_queues(dev, port->num_def_qps); 3012 netif_set_real_num_tx_queues(dev, port->num_def_qps); 3013 3014 port_dev = ehea_register_port(port, dn); 3015 if (!port_dev) 3016 goto out_free_mc_list; 3017 3018 SET_NETDEV_DEV(dev, port_dev); 3019 3020 /* initialize net_device structure */ 3021 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); 3022 3023 dev->netdev_ops = &ehea_netdev_ops; 3024 ehea_set_ethtool_ops(dev); 3025 3026 dev->hw_features = NETIF_F_SG | NETIF_F_TSO | 3027 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX; 3028 dev->features = NETIF_F_SG | NETIF_F_TSO | 3029 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | 3030 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 3031 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM; 3032 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3033 NETIF_F_IP_CSUM; 3034 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3035 3036 /* MTU range: 68 - 9022 */ 3037 dev->min_mtu = ETH_MIN_MTU; 3038 dev->max_mtu = EHEA_MAX_PACKET_SIZE; 3039 3040 INIT_WORK(&port->reset_task, ehea_reset_port); 3041 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3042 3043 init_waitqueue_head(&port->swqe_avail_wq); 3044 init_waitqueue_head(&port->restart_wq); 3045 3046 ret = register_netdev(dev); 3047 if (ret) { 3048 pr_err("register_netdev failed. ret=%d\n", ret); 3049 goto out_unreg_port; 3050 } 3051 3052 ret = ehea_get_jumboframe_status(port, &jumbo); 3053 if (ret) 3054 netdev_err(dev, "failed determining jumbo frame status\n"); 3055 3056 netdev_info(dev, "Jumbo frames are %sabled\n", 3057 jumbo == 1 ? "en" : "dis"); 3058 3059 adapter->active_ports++; 3060 3061 return port; 3062 3063 out_unreg_port: 3064 ehea_unregister_port(port); 3065 3066 out_free_mc_list: 3067 kfree(port->mc_list); 3068 3069 out_free_ethdev: 3070 free_netdev(dev); 3071 3072 out_err: 3073 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3074 logical_port_id, ret); 3075 return NULL; 3076 } 3077 3078 static void ehea_shutdown_single_port(struct ehea_port *port) 3079 { 3080 struct ehea_adapter *adapter = port->adapter; 3081 3082 cancel_work_sync(&port->reset_task); 3083 cancel_delayed_work_sync(&port->stats_work); 3084 unregister_netdev(port->netdev); 3085 ehea_unregister_port(port); 3086 kfree(port->mc_list); 3087 free_netdev(port->netdev); 3088 adapter->active_ports--; 3089 } 3090 3091 static int ehea_setup_ports(struct ehea_adapter *adapter) 3092 { 3093 struct device_node *lhea_dn; 3094 struct device_node *eth_dn = NULL; 3095 3096 const u32 *dn_log_port_id; 3097 int i = 0; 3098 3099 lhea_dn = adapter->ofdev->dev.of_node; 3100 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3101 3102 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3103 NULL); 3104 if (!dn_log_port_id) { 3105 pr_err("bad device node: eth_dn name=%pOF\n", eth_dn); 3106 continue; 3107 } 3108 3109 if (ehea_add_adapter_mr(adapter)) { 3110 pr_err("creating MR failed\n"); 3111 of_node_put(eth_dn); 3112 return -EIO; 3113 } 3114 3115 adapter->port[i] = ehea_setup_single_port(adapter, 3116 *dn_log_port_id, 3117 eth_dn); 3118 if (adapter->port[i]) 3119 netdev_info(adapter->port[i]->netdev, 3120 "logical port id #%d\n", *dn_log_port_id); 3121 else 3122 ehea_remove_adapter_mr(adapter); 3123 3124 i++; 3125 } 3126 return 0; 3127 } 3128 3129 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3130 u32 logical_port_id) 3131 { 3132 struct device_node *lhea_dn; 3133 struct device_node *eth_dn = NULL; 3134 const u32 *dn_log_port_id; 3135 3136 lhea_dn = adapter->ofdev->dev.of_node; 3137 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3138 3139 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3140 NULL); 3141 if (dn_log_port_id) 3142 if (*dn_log_port_id == logical_port_id) 3143 return eth_dn; 3144 } 3145 3146 return NULL; 3147 } 3148 3149 static ssize_t ehea_probe_port(struct device *dev, 3150 struct device_attribute *attr, 3151 const char *buf, size_t count) 3152 { 3153 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3154 struct ehea_port *port; 3155 struct device_node *eth_dn = NULL; 3156 int i; 3157 3158 u32 logical_port_id; 3159 3160 sscanf(buf, "%d", &logical_port_id); 3161 3162 port = ehea_get_port(adapter, logical_port_id); 3163 3164 if (port) { 3165 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3166 logical_port_id); 3167 return -EINVAL; 3168 } 3169 3170 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3171 3172 if (!eth_dn) { 3173 pr_info("no logical port with id %d found\n", logical_port_id); 3174 return -EINVAL; 3175 } 3176 3177 if (ehea_add_adapter_mr(adapter)) { 3178 pr_err("creating MR failed\n"); 3179 return -EIO; 3180 } 3181 3182 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3183 3184 of_node_put(eth_dn); 3185 3186 if (port) { 3187 for (i = 0; i < EHEA_MAX_PORTS; i++) 3188 if (!adapter->port[i]) { 3189 adapter->port[i] = port; 3190 break; 3191 } 3192 3193 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3194 logical_port_id); 3195 } else { 3196 ehea_remove_adapter_mr(adapter); 3197 return -EIO; 3198 } 3199 3200 return (ssize_t) count; 3201 } 3202 3203 static ssize_t ehea_remove_port(struct device *dev, 3204 struct device_attribute *attr, 3205 const char *buf, size_t count) 3206 { 3207 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3208 struct ehea_port *port; 3209 int i; 3210 u32 logical_port_id; 3211 3212 sscanf(buf, "%d", &logical_port_id); 3213 3214 port = ehea_get_port(adapter, logical_port_id); 3215 3216 if (port) { 3217 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3218 logical_port_id); 3219 3220 ehea_shutdown_single_port(port); 3221 3222 for (i = 0; i < EHEA_MAX_PORTS; i++) 3223 if (adapter->port[i] == port) { 3224 adapter->port[i] = NULL; 3225 break; 3226 } 3227 } else { 3228 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3229 logical_port_id); 3230 return -EINVAL; 3231 } 3232 3233 ehea_remove_adapter_mr(adapter); 3234 3235 return (ssize_t) count; 3236 } 3237 3238 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port); 3239 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port); 3240 3241 static int ehea_create_device_sysfs(struct platform_device *dev) 3242 { 3243 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3244 if (ret) 3245 goto out; 3246 3247 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3248 out: 3249 return ret; 3250 } 3251 3252 static void ehea_remove_device_sysfs(struct platform_device *dev) 3253 { 3254 device_remove_file(&dev->dev, &dev_attr_probe_port); 3255 device_remove_file(&dev->dev, &dev_attr_remove_port); 3256 } 3257 3258 static int ehea_reboot_notifier(struct notifier_block *nb, 3259 unsigned long action, void *unused) 3260 { 3261 if (action == SYS_RESTART) { 3262 pr_info("Reboot: freeing all eHEA resources\n"); 3263 ibmebus_unregister_driver(&ehea_driver); 3264 } 3265 return NOTIFY_DONE; 3266 } 3267 3268 static struct notifier_block ehea_reboot_nb = { 3269 .notifier_call = ehea_reboot_notifier, 3270 }; 3271 3272 static int ehea_mem_notifier(struct notifier_block *nb, 3273 unsigned long action, void *data) 3274 { 3275 int ret = NOTIFY_BAD; 3276 struct memory_notify *arg = data; 3277 3278 mutex_lock(&dlpar_mem_lock); 3279 3280 switch (action) { 3281 case MEM_CANCEL_OFFLINE: 3282 pr_info("memory offlining canceled"); 3283 /* Fall through: re-add canceled memory block */ 3284 3285 case MEM_ONLINE: 3286 pr_info("memory is going online"); 3287 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3288 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3289 goto out_unlock; 3290 ehea_rereg_mrs(); 3291 break; 3292 3293 case MEM_GOING_OFFLINE: 3294 pr_info("memory is going offline"); 3295 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3296 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3297 goto out_unlock; 3298 ehea_rereg_mrs(); 3299 break; 3300 3301 default: 3302 break; 3303 } 3304 3305 ehea_update_firmware_handles(); 3306 ret = NOTIFY_OK; 3307 3308 out_unlock: 3309 mutex_unlock(&dlpar_mem_lock); 3310 return ret; 3311 } 3312 3313 static struct notifier_block ehea_mem_nb = { 3314 .notifier_call = ehea_mem_notifier, 3315 }; 3316 3317 static void ehea_crash_handler(void) 3318 { 3319 int i; 3320 3321 if (ehea_fw_handles.arr) 3322 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3323 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3324 ehea_fw_handles.arr[i].fwh, 3325 FORCE_FREE); 3326 3327 if (ehea_bcmc_regs.arr) 3328 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3329 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3330 ehea_bcmc_regs.arr[i].port_id, 3331 ehea_bcmc_regs.arr[i].reg_type, 3332 ehea_bcmc_regs.arr[i].macaddr, 3333 0, H_DEREG_BCMC); 3334 } 3335 3336 static atomic_t ehea_memory_hooks_registered; 3337 3338 /* Register memory hooks on probe of first adapter */ 3339 static int ehea_register_memory_hooks(void) 3340 { 3341 int ret = 0; 3342 3343 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1) 3344 return 0; 3345 3346 ret = ehea_create_busmap(); 3347 if (ret) { 3348 pr_info("ehea_create_busmap failed\n"); 3349 goto out; 3350 } 3351 3352 ret = register_reboot_notifier(&ehea_reboot_nb); 3353 if (ret) { 3354 pr_info("register_reboot_notifier failed\n"); 3355 goto out; 3356 } 3357 3358 ret = register_memory_notifier(&ehea_mem_nb); 3359 if (ret) { 3360 pr_info("register_memory_notifier failed\n"); 3361 goto out2; 3362 } 3363 3364 ret = crash_shutdown_register(ehea_crash_handler); 3365 if (ret) { 3366 pr_info("crash_shutdown_register failed\n"); 3367 goto out3; 3368 } 3369 3370 return 0; 3371 3372 out3: 3373 unregister_memory_notifier(&ehea_mem_nb); 3374 out2: 3375 unregister_reboot_notifier(&ehea_reboot_nb); 3376 out: 3377 atomic_dec(&ehea_memory_hooks_registered); 3378 return ret; 3379 } 3380 3381 static void ehea_unregister_memory_hooks(void) 3382 { 3383 /* Only remove the hooks if we've registered them */ 3384 if (atomic_read(&ehea_memory_hooks_registered) == 0) 3385 return; 3386 3387 unregister_reboot_notifier(&ehea_reboot_nb); 3388 if (crash_shutdown_unregister(ehea_crash_handler)) 3389 pr_info("failed unregistering crash handler\n"); 3390 unregister_memory_notifier(&ehea_mem_nb); 3391 } 3392 3393 static int ehea_probe_adapter(struct platform_device *dev) 3394 { 3395 struct ehea_adapter *adapter; 3396 const u64 *adapter_handle; 3397 int ret; 3398 int i; 3399 3400 ret = ehea_register_memory_hooks(); 3401 if (ret) 3402 return ret; 3403 3404 if (!dev || !dev->dev.of_node) { 3405 pr_err("Invalid ibmebus device probed\n"); 3406 return -EINVAL; 3407 } 3408 3409 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL); 3410 if (!adapter) { 3411 ret = -ENOMEM; 3412 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3413 goto out; 3414 } 3415 3416 list_add(&adapter->list, &adapter_list); 3417 3418 adapter->ofdev = dev; 3419 3420 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3421 NULL); 3422 if (adapter_handle) 3423 adapter->handle = *adapter_handle; 3424 3425 if (!adapter->handle) { 3426 dev_err(&dev->dev, "failed getting handle for adapter" 3427 " '%pOF'\n", dev->dev.of_node); 3428 ret = -ENODEV; 3429 goto out_free_ad; 3430 } 3431 3432 adapter->pd = EHEA_PD_ID; 3433 3434 platform_set_drvdata(dev, adapter); 3435 3436 3437 /* initialize adapter and ports */ 3438 /* get adapter properties */ 3439 ret = ehea_sense_adapter_attr(adapter); 3440 if (ret) { 3441 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3442 goto out_free_ad; 3443 } 3444 3445 adapter->neq = ehea_create_eq(adapter, 3446 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3447 if (!adapter->neq) { 3448 ret = -EIO; 3449 dev_err(&dev->dev, "NEQ creation failed\n"); 3450 goto out_free_ad; 3451 } 3452 3453 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, 3454 (unsigned long)adapter); 3455 3456 ret = ehea_create_device_sysfs(dev); 3457 if (ret) 3458 goto out_kill_eq; 3459 3460 ret = ehea_setup_ports(adapter); 3461 if (ret) { 3462 dev_err(&dev->dev, "setup_ports failed\n"); 3463 goto out_rem_dev_sysfs; 3464 } 3465 3466 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3467 ehea_interrupt_neq, 0, 3468 "ehea_neq", adapter); 3469 if (ret) { 3470 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3471 goto out_shutdown_ports; 3472 } 3473 3474 /* Handle any events that might be pending. */ 3475 tasklet_hi_schedule(&adapter->neq_tasklet); 3476 3477 ret = 0; 3478 goto out; 3479 3480 out_shutdown_ports: 3481 for (i = 0; i < EHEA_MAX_PORTS; i++) 3482 if (adapter->port[i]) { 3483 ehea_shutdown_single_port(adapter->port[i]); 3484 adapter->port[i] = NULL; 3485 } 3486 3487 out_rem_dev_sysfs: 3488 ehea_remove_device_sysfs(dev); 3489 3490 out_kill_eq: 3491 ehea_destroy_eq(adapter->neq); 3492 3493 out_free_ad: 3494 list_del(&adapter->list); 3495 3496 out: 3497 ehea_update_firmware_handles(); 3498 3499 return ret; 3500 } 3501 3502 static int ehea_remove(struct platform_device *dev) 3503 { 3504 struct ehea_adapter *adapter = platform_get_drvdata(dev); 3505 int i; 3506 3507 for (i = 0; i < EHEA_MAX_PORTS; i++) 3508 if (adapter->port[i]) { 3509 ehea_shutdown_single_port(adapter->port[i]); 3510 adapter->port[i] = NULL; 3511 } 3512 3513 ehea_remove_device_sysfs(dev); 3514 3515 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3516 tasklet_kill(&adapter->neq_tasklet); 3517 3518 ehea_destroy_eq(adapter->neq); 3519 ehea_remove_adapter_mr(adapter); 3520 list_del(&adapter->list); 3521 3522 ehea_update_firmware_handles(); 3523 3524 return 0; 3525 } 3526 3527 static int check_module_parm(void) 3528 { 3529 int ret = 0; 3530 3531 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3532 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3533 pr_info("Bad parameter: rq1_entries\n"); 3534 ret = -EINVAL; 3535 } 3536 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3537 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3538 pr_info("Bad parameter: rq2_entries\n"); 3539 ret = -EINVAL; 3540 } 3541 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3542 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3543 pr_info("Bad parameter: rq3_entries\n"); 3544 ret = -EINVAL; 3545 } 3546 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3547 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3548 pr_info("Bad parameter: sq_entries\n"); 3549 ret = -EINVAL; 3550 } 3551 3552 return ret; 3553 } 3554 3555 static ssize_t capabilities_show(struct device_driver *drv, char *buf) 3556 { 3557 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3558 } 3559 3560 static DRIVER_ATTR_RO(capabilities); 3561 3562 static int __init ehea_module_init(void) 3563 { 3564 int ret; 3565 3566 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3567 3568 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3569 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3570 3571 mutex_init(&ehea_fw_handles.lock); 3572 spin_lock_init(&ehea_bcmc_regs.lock); 3573 3574 ret = check_module_parm(); 3575 if (ret) 3576 goto out; 3577 3578 ret = ibmebus_register_driver(&ehea_driver); 3579 if (ret) { 3580 pr_err("failed registering eHEA device driver on ebus\n"); 3581 goto out; 3582 } 3583 3584 ret = driver_create_file(&ehea_driver.driver, 3585 &driver_attr_capabilities); 3586 if (ret) { 3587 pr_err("failed to register capabilities attribute, ret=%d\n", 3588 ret); 3589 goto out2; 3590 } 3591 3592 return ret; 3593 3594 out2: 3595 ibmebus_unregister_driver(&ehea_driver); 3596 out: 3597 return ret; 3598 } 3599 3600 static void __exit ehea_module_exit(void) 3601 { 3602 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3603 ibmebus_unregister_driver(&ehea_driver); 3604 ehea_unregister_memory_hooks(); 3605 kfree(ehea_fw_handles.arr); 3606 kfree(ehea_bcmc_regs.arr); 3607 ehea_destroy_busmap(); 3608 } 3609 3610 module_init(ehea_module_init); 3611 module_exit(ehea_module_exit); 3612