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 struct rtnl_link_stats64 *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 return stats; 356 } 357 358 static void ehea_update_stats(struct work_struct *work) 359 { 360 struct ehea_port *port = 361 container_of(work, struct ehea_port, stats_work.work); 362 struct net_device *dev = port->netdev; 363 struct rtnl_link_stats64 *stats = &port->stats; 364 struct hcp_ehea_port_cb2 *cb2; 365 u64 hret; 366 367 cb2 = (void *)get_zeroed_page(GFP_KERNEL); 368 if (!cb2) { 369 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n"); 370 goto resched; 371 } 372 373 hret = ehea_h_query_ehea_port(port->adapter->handle, 374 port->logical_port_id, 375 H_PORT_CB2, H_PORT_CB2_ALL, cb2); 376 if (hret != H_SUCCESS) { 377 netdev_err(dev, "query_ehea_port failed\n"); 378 goto out_herr; 379 } 380 381 if (netif_msg_hw(port)) 382 ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); 383 384 stats->multicast = cb2->rxmcp; 385 stats->rx_errors = cb2->rxuerr; 386 387 out_herr: 388 free_page((unsigned long)cb2); 389 resched: 390 schedule_delayed_work(&port->stats_work, 391 round_jiffies_relative(msecs_to_jiffies(1000))); 392 } 393 394 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) 395 { 396 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 397 struct net_device *dev = pr->port->netdev; 398 int max_index_mask = pr->rq1_skba.len - 1; 399 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; 400 int adder = 0; 401 int i; 402 403 pr->rq1_skba.os_skbs = 0; 404 405 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 406 if (nr_of_wqes > 0) 407 pr->rq1_skba.index = index; 408 pr->rq1_skba.os_skbs = fill_wqes; 409 return; 410 } 411 412 for (i = 0; i < fill_wqes; i++) { 413 if (!skb_arr_rq1[index]) { 414 skb_arr_rq1[index] = netdev_alloc_skb(dev, 415 EHEA_L_PKT_SIZE); 416 if (!skb_arr_rq1[index]) { 417 pr->rq1_skba.os_skbs = fill_wqes - i; 418 break; 419 } 420 } 421 index--; 422 index &= max_index_mask; 423 adder++; 424 } 425 426 if (adder == 0) 427 return; 428 429 /* Ring doorbell */ 430 ehea_update_rq1a(pr->qp, adder); 431 } 432 433 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) 434 { 435 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 436 struct net_device *dev = pr->port->netdev; 437 int i; 438 439 if (nr_rq1a > pr->rq1_skba.len) { 440 netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); 441 return; 442 } 443 444 for (i = 0; i < nr_rq1a; i++) { 445 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); 446 if (!skb_arr_rq1[i]) 447 break; 448 } 449 /* Ring doorbell */ 450 ehea_update_rq1a(pr->qp, i - 1); 451 } 452 453 static int ehea_refill_rq_def(struct ehea_port_res *pr, 454 struct ehea_q_skb_arr *q_skba, int rq_nr, 455 int num_wqes, int wqe_type, int packet_size) 456 { 457 struct net_device *dev = pr->port->netdev; 458 struct ehea_qp *qp = pr->qp; 459 struct sk_buff **skb_arr = q_skba->arr; 460 struct ehea_rwqe *rwqe; 461 int i, index, max_index_mask, fill_wqes; 462 int adder = 0; 463 int ret = 0; 464 465 fill_wqes = q_skba->os_skbs + num_wqes; 466 q_skba->os_skbs = 0; 467 468 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 469 q_skba->os_skbs = fill_wqes; 470 return ret; 471 } 472 473 index = q_skba->index; 474 max_index_mask = q_skba->len - 1; 475 for (i = 0; i < fill_wqes; i++) { 476 u64 tmp_addr; 477 struct sk_buff *skb; 478 479 skb = netdev_alloc_skb_ip_align(dev, packet_size); 480 if (!skb) { 481 q_skba->os_skbs = fill_wqes - i; 482 if (q_skba->os_skbs == q_skba->len - 2) { 483 netdev_info(pr->port->netdev, 484 "rq%i ran dry - no mem for skb\n", 485 rq_nr); 486 ret = -ENOMEM; 487 } 488 break; 489 } 490 491 skb_arr[index] = skb; 492 tmp_addr = ehea_map_vaddr(skb->data); 493 if (tmp_addr == -1) { 494 dev_consume_skb_any(skb); 495 q_skba->os_skbs = fill_wqes - i; 496 ret = 0; 497 break; 498 } 499 500 rwqe = ehea_get_next_rwqe(qp, rq_nr); 501 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type) 502 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index); 503 rwqe->sg_list[0].l_key = pr->recv_mr.lkey; 504 rwqe->sg_list[0].vaddr = tmp_addr; 505 rwqe->sg_list[0].len = packet_size; 506 rwqe->data_segments = 1; 507 508 index++; 509 index &= max_index_mask; 510 adder++; 511 } 512 513 q_skba->index = index; 514 if (adder == 0) 515 goto out; 516 517 /* Ring doorbell */ 518 iosync(); 519 if (rq_nr == 2) 520 ehea_update_rq2a(pr->qp, adder); 521 else 522 ehea_update_rq3a(pr->qp, adder); 523 out: 524 return ret; 525 } 526 527 528 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) 529 { 530 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, 531 nr_of_wqes, EHEA_RWQE2_TYPE, 532 EHEA_RQ2_PKT_SIZE); 533 } 534 535 536 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) 537 { 538 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, 539 nr_of_wqes, EHEA_RWQE3_TYPE, 540 EHEA_MAX_PACKET_SIZE); 541 } 542 543 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) 544 { 545 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; 546 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) 547 return 0; 548 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && 549 (cqe->header_length == 0)) 550 return 0; 551 return -EINVAL; 552 } 553 554 static inline void ehea_fill_skb(struct net_device *dev, 555 struct sk_buff *skb, struct ehea_cqe *cqe, 556 struct ehea_port_res *pr) 557 { 558 int length = cqe->num_bytes_transfered - 4; /*remove CRC */ 559 560 skb_put(skb, length); 561 skb->protocol = eth_type_trans(skb, dev); 562 563 /* The packet was not an IPV4 packet so a complemented checksum was 564 calculated. The value is found in the Internet Checksum field. */ 565 if (cqe->status & EHEA_CQE_BLIND_CKSUM) { 566 skb->ip_summed = CHECKSUM_COMPLETE; 567 skb->csum = csum_unfold(~cqe->inet_checksum_value); 568 } else 569 skb->ip_summed = CHECKSUM_UNNECESSARY; 570 571 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]); 572 } 573 574 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, 575 int arr_len, 576 struct ehea_cqe *cqe) 577 { 578 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 579 struct sk_buff *skb; 580 void *pref; 581 int x; 582 583 x = skb_index + 1; 584 x &= (arr_len - 1); 585 586 pref = skb_array[x]; 587 if (pref) { 588 prefetchw(pref); 589 prefetchw(pref + EHEA_CACHE_LINE); 590 591 pref = (skb_array[x]->data); 592 prefetch(pref); 593 prefetch(pref + EHEA_CACHE_LINE); 594 prefetch(pref + EHEA_CACHE_LINE * 2); 595 prefetch(pref + EHEA_CACHE_LINE * 3); 596 } 597 598 skb = skb_array[skb_index]; 599 skb_array[skb_index] = NULL; 600 return skb; 601 } 602 603 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, 604 int arr_len, int wqe_index) 605 { 606 struct sk_buff *skb; 607 void *pref; 608 int x; 609 610 x = wqe_index + 1; 611 x &= (arr_len - 1); 612 613 pref = skb_array[x]; 614 if (pref) { 615 prefetchw(pref); 616 prefetchw(pref + EHEA_CACHE_LINE); 617 618 pref = (skb_array[x]->data); 619 prefetchw(pref); 620 prefetchw(pref + EHEA_CACHE_LINE); 621 } 622 623 skb = skb_array[wqe_index]; 624 skb_array[wqe_index] = NULL; 625 return skb; 626 } 627 628 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, 629 struct ehea_cqe *cqe, int *processed_rq2, 630 int *processed_rq3) 631 { 632 struct sk_buff *skb; 633 634 if (cqe->status & EHEA_CQE_STAT_ERR_TCP) 635 pr->p_stats.err_tcp_cksum++; 636 if (cqe->status & EHEA_CQE_STAT_ERR_IP) 637 pr->p_stats.err_ip_cksum++; 638 if (cqe->status & EHEA_CQE_STAT_ERR_CRC) 639 pr->p_stats.err_frame_crc++; 640 641 if (rq == 2) { 642 *processed_rq2 += 1; 643 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe); 644 dev_kfree_skb(skb); 645 } else if (rq == 3) { 646 *processed_rq3 += 1; 647 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe); 648 dev_kfree_skb(skb); 649 } 650 651 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) { 652 if (netif_msg_rx_err(pr->port)) { 653 pr_err("Critical receive error for QP %d. Resetting port.\n", 654 pr->qp->init_attr.qp_nr); 655 ehea_dump(cqe, sizeof(*cqe), "CQE"); 656 } 657 ehea_schedule_port_reset(pr->port); 658 return 1; 659 } 660 661 return 0; 662 } 663 664 static int ehea_proc_rwqes(struct net_device *dev, 665 struct ehea_port_res *pr, 666 int budget) 667 { 668 struct ehea_port *port = pr->port; 669 struct ehea_qp *qp = pr->qp; 670 struct ehea_cqe *cqe; 671 struct sk_buff *skb; 672 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 673 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; 674 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; 675 int skb_arr_rq1_len = pr->rq1_skba.len; 676 int skb_arr_rq2_len = pr->rq2_skba.len; 677 int skb_arr_rq3_len = pr->rq3_skba.len; 678 int processed, processed_rq1, processed_rq2, processed_rq3; 679 u64 processed_bytes = 0; 680 int wqe_index, last_wqe_index, rq, port_reset; 681 682 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; 683 last_wqe_index = 0; 684 685 cqe = ehea_poll_rq1(qp, &wqe_index); 686 while ((processed < budget) && cqe) { 687 ehea_inc_rq1(qp); 688 processed_rq1++; 689 processed++; 690 if (netif_msg_rx_status(port)) 691 ehea_dump(cqe, sizeof(*cqe), "CQE"); 692 693 last_wqe_index = wqe_index; 694 rmb(); 695 if (!ehea_check_cqe(cqe, &rq)) { 696 if (rq == 1) { 697 /* LL RQ1 */ 698 skb = get_skb_by_index_ll(skb_arr_rq1, 699 skb_arr_rq1_len, 700 wqe_index); 701 if (unlikely(!skb)) { 702 netif_info(port, rx_err, dev, 703 "LL rq1: skb=NULL\n"); 704 705 skb = netdev_alloc_skb(dev, 706 EHEA_L_PKT_SIZE); 707 if (!skb) 708 break; 709 } 710 skb_copy_to_linear_data(skb, ((char *)cqe) + 64, 711 cqe->num_bytes_transfered - 4); 712 ehea_fill_skb(dev, skb, cqe, pr); 713 } else if (rq == 2) { 714 /* RQ2 */ 715 skb = get_skb_by_index(skb_arr_rq2, 716 skb_arr_rq2_len, cqe); 717 if (unlikely(!skb)) { 718 netif_err(port, rx_err, dev, 719 "rq2: skb=NULL\n"); 720 break; 721 } 722 ehea_fill_skb(dev, skb, cqe, pr); 723 processed_rq2++; 724 } else { 725 /* RQ3 */ 726 skb = get_skb_by_index(skb_arr_rq3, 727 skb_arr_rq3_len, cqe); 728 if (unlikely(!skb)) { 729 netif_err(port, rx_err, dev, 730 "rq3: skb=NULL\n"); 731 break; 732 } 733 ehea_fill_skb(dev, skb, cqe, pr); 734 processed_rq3++; 735 } 736 737 processed_bytes += skb->len; 738 739 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 740 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 741 cqe->vlan_tag); 742 743 napi_gro_receive(&pr->napi, skb); 744 } else { 745 pr->p_stats.poll_receive_errors++; 746 port_reset = ehea_treat_poll_error(pr, rq, cqe, 747 &processed_rq2, 748 &processed_rq3); 749 if (port_reset) 750 break; 751 } 752 cqe = ehea_poll_rq1(qp, &wqe_index); 753 } 754 755 pr->rx_packets += processed; 756 pr->rx_bytes += processed_bytes; 757 758 ehea_refill_rq1(pr, last_wqe_index, processed_rq1); 759 ehea_refill_rq2(pr, processed_rq2); 760 ehea_refill_rq3(pr, processed_rq3); 761 762 return processed; 763 } 764 765 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull 766 767 static void reset_sq_restart_flag(struct ehea_port *port) 768 { 769 int i; 770 771 for (i = 0; i < port->num_def_qps; i++) { 772 struct ehea_port_res *pr = &port->port_res[i]; 773 pr->sq_restart_flag = 0; 774 } 775 wake_up(&port->restart_wq); 776 } 777 778 static void check_sqs(struct ehea_port *port) 779 { 780 struct ehea_swqe *swqe; 781 int swqe_index; 782 int i, k; 783 784 for (i = 0; i < port->num_def_qps; i++) { 785 struct ehea_port_res *pr = &port->port_res[i]; 786 int ret; 787 k = 0; 788 swqe = ehea_get_swqe(pr->qp, &swqe_index); 789 memset(swqe, 0, SWQE_HEADER_SIZE); 790 atomic_dec(&pr->swqe_avail); 791 792 swqe->tx_control |= EHEA_SWQE_PURGE; 793 swqe->wr_id = SWQE_RESTART_CHECK; 794 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 795 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; 796 swqe->immediate_data_length = 80; 797 798 ehea_post_swqe(pr->qp, swqe); 799 800 ret = wait_event_timeout(port->restart_wq, 801 pr->sq_restart_flag == 0, 802 msecs_to_jiffies(100)); 803 804 if (!ret) { 805 pr_err("HW/SW queues out of sync\n"); 806 ehea_schedule_port_reset(pr->port); 807 return; 808 } 809 } 810 } 811 812 813 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) 814 { 815 struct sk_buff *skb; 816 struct ehea_cq *send_cq = pr->send_cq; 817 struct ehea_cqe *cqe; 818 int quota = my_quota; 819 int cqe_counter = 0; 820 int swqe_av = 0; 821 int index; 822 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, 823 pr - &pr->port->port_res[0]); 824 825 cqe = ehea_poll_cq(send_cq); 826 while (cqe && (quota > 0)) { 827 ehea_inc_cq(send_cq); 828 829 cqe_counter++; 830 rmb(); 831 832 if (cqe->wr_id == SWQE_RESTART_CHECK) { 833 pr->sq_restart_flag = 1; 834 swqe_av++; 835 break; 836 } 837 838 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { 839 pr_err("Bad send completion status=0x%04X\n", 840 cqe->status); 841 842 if (netif_msg_tx_err(pr->port)) 843 ehea_dump(cqe, sizeof(*cqe), "Send CQE"); 844 845 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { 846 pr_err("Resetting port\n"); 847 ehea_schedule_port_reset(pr->port); 848 break; 849 } 850 } 851 852 if (netif_msg_tx_done(pr->port)) 853 ehea_dump(cqe, sizeof(*cqe), "CQE"); 854 855 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) 856 == EHEA_SWQE2_TYPE)) { 857 858 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 859 skb = pr->sq_skba.arr[index]; 860 dev_consume_skb_any(skb); 861 pr->sq_skba.arr[index] = NULL; 862 } 863 864 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); 865 quota--; 866 867 cqe = ehea_poll_cq(send_cq); 868 } 869 870 ehea_update_feca(send_cq, cqe_counter); 871 atomic_add(swqe_av, &pr->swqe_avail); 872 873 if (unlikely(netif_tx_queue_stopped(txq) && 874 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { 875 __netif_tx_lock(txq, smp_processor_id()); 876 if (netif_tx_queue_stopped(txq) && 877 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) 878 netif_tx_wake_queue(txq); 879 __netif_tx_unlock(txq); 880 } 881 882 wake_up(&pr->port->swqe_avail_wq); 883 884 return cqe; 885 } 886 887 #define EHEA_POLL_MAX_CQES 65535 888 889 static int ehea_poll(struct napi_struct *napi, int budget) 890 { 891 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, 892 napi); 893 struct net_device *dev = pr->port->netdev; 894 struct ehea_cqe *cqe; 895 struct ehea_cqe *cqe_skb = NULL; 896 int wqe_index; 897 int rx = 0; 898 899 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 900 rx += ehea_proc_rwqes(dev, pr, budget - rx); 901 902 while (rx != budget) { 903 napi_complete(napi); 904 ehea_reset_cq_ep(pr->recv_cq); 905 ehea_reset_cq_ep(pr->send_cq); 906 ehea_reset_cq_n1(pr->recv_cq); 907 ehea_reset_cq_n1(pr->send_cq); 908 rmb(); 909 cqe = ehea_poll_rq1(pr->qp, &wqe_index); 910 cqe_skb = ehea_poll_cq(pr->send_cq); 911 912 if (!cqe && !cqe_skb) 913 return rx; 914 915 if (!napi_reschedule(napi)) 916 return rx; 917 918 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 919 rx += ehea_proc_rwqes(dev, pr, budget - rx); 920 } 921 922 return rx; 923 } 924 925 #ifdef CONFIG_NET_POLL_CONTROLLER 926 static void ehea_netpoll(struct net_device *dev) 927 { 928 struct ehea_port *port = netdev_priv(dev); 929 int i; 930 931 for (i = 0; i < port->num_def_qps; i++) 932 napi_schedule(&port->port_res[i].napi); 933 } 934 #endif 935 936 static irqreturn_t ehea_recv_irq_handler(int irq, void *param) 937 { 938 struct ehea_port_res *pr = param; 939 940 napi_schedule(&pr->napi); 941 942 return IRQ_HANDLED; 943 } 944 945 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) 946 { 947 struct ehea_port *port = param; 948 struct ehea_eqe *eqe; 949 struct ehea_qp *qp; 950 u32 qp_token; 951 u64 resource_type, aer, aerr; 952 int reset_port = 0; 953 954 eqe = ehea_poll_eq(port->qp_eq); 955 956 while (eqe) { 957 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); 958 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", 959 eqe->entry, qp_token); 960 961 qp = port->port_res[qp_token].qp; 962 963 resource_type = ehea_error_data(port->adapter, qp->fw_handle, 964 &aer, &aerr); 965 966 if (resource_type == EHEA_AER_RESTYPE_QP) { 967 if ((aer & EHEA_AER_RESET_MASK) || 968 (aerr & EHEA_AERR_RESET_MASK)) 969 reset_port = 1; 970 } else 971 reset_port = 1; /* Reset in case of CQ or EQ error */ 972 973 eqe = ehea_poll_eq(port->qp_eq); 974 } 975 976 if (reset_port) { 977 pr_err("Resetting port\n"); 978 ehea_schedule_port_reset(port); 979 } 980 981 return IRQ_HANDLED; 982 } 983 984 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, 985 int logical_port) 986 { 987 int i; 988 989 for (i = 0; i < EHEA_MAX_PORTS; i++) 990 if (adapter->port[i]) 991 if (adapter->port[i]->logical_port_id == logical_port) 992 return adapter->port[i]; 993 return NULL; 994 } 995 996 int ehea_sense_port_attr(struct ehea_port *port) 997 { 998 int ret; 999 u64 hret; 1000 struct hcp_ehea_port_cb0 *cb0; 1001 1002 /* may be called via ehea_neq_tasklet() */ 1003 cb0 = (void *)get_zeroed_page(GFP_ATOMIC); 1004 if (!cb0) { 1005 pr_err("no mem for cb0\n"); 1006 ret = -ENOMEM; 1007 goto out; 1008 } 1009 1010 hret = ehea_h_query_ehea_port(port->adapter->handle, 1011 port->logical_port_id, H_PORT_CB0, 1012 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), 1013 cb0); 1014 if (hret != H_SUCCESS) { 1015 ret = -EIO; 1016 goto out_free; 1017 } 1018 1019 /* MAC address */ 1020 port->mac_addr = cb0->port_mac_addr << 16; 1021 1022 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { 1023 ret = -EADDRNOTAVAIL; 1024 goto out_free; 1025 } 1026 1027 /* Port speed */ 1028 switch (cb0->port_speed) { 1029 case H_SPEED_10M_H: 1030 port->port_speed = EHEA_SPEED_10M; 1031 port->full_duplex = 0; 1032 break; 1033 case H_SPEED_10M_F: 1034 port->port_speed = EHEA_SPEED_10M; 1035 port->full_duplex = 1; 1036 break; 1037 case H_SPEED_100M_H: 1038 port->port_speed = EHEA_SPEED_100M; 1039 port->full_duplex = 0; 1040 break; 1041 case H_SPEED_100M_F: 1042 port->port_speed = EHEA_SPEED_100M; 1043 port->full_duplex = 1; 1044 break; 1045 case H_SPEED_1G_F: 1046 port->port_speed = EHEA_SPEED_1G; 1047 port->full_duplex = 1; 1048 break; 1049 case H_SPEED_10G_F: 1050 port->port_speed = EHEA_SPEED_10G; 1051 port->full_duplex = 1; 1052 break; 1053 default: 1054 port->port_speed = 0; 1055 port->full_duplex = 0; 1056 break; 1057 } 1058 1059 port->autoneg = 1; 1060 port->num_mcs = cb0->num_default_qps; 1061 1062 /* Number of default QPs */ 1063 if (use_mcs) 1064 port->num_def_qps = cb0->num_default_qps; 1065 else 1066 port->num_def_qps = 1; 1067 1068 if (!port->num_def_qps) { 1069 ret = -EINVAL; 1070 goto out_free; 1071 } 1072 1073 ret = 0; 1074 out_free: 1075 if (ret || netif_msg_probe(port)) 1076 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); 1077 free_page((unsigned long)cb0); 1078 out: 1079 return ret; 1080 } 1081 1082 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) 1083 { 1084 struct hcp_ehea_port_cb4 *cb4; 1085 u64 hret; 1086 int ret = 0; 1087 1088 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 1089 if (!cb4) { 1090 pr_err("no mem for cb4\n"); 1091 ret = -ENOMEM; 1092 goto out; 1093 } 1094 1095 cb4->port_speed = port_speed; 1096 1097 netif_carrier_off(port->netdev); 1098 1099 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1100 port->logical_port_id, 1101 H_PORT_CB4, H_PORT_CB4_SPEED, cb4); 1102 if (hret == H_SUCCESS) { 1103 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; 1104 1105 hret = ehea_h_query_ehea_port(port->adapter->handle, 1106 port->logical_port_id, 1107 H_PORT_CB4, H_PORT_CB4_SPEED, 1108 cb4); 1109 if (hret == H_SUCCESS) { 1110 switch (cb4->port_speed) { 1111 case H_SPEED_10M_H: 1112 port->port_speed = EHEA_SPEED_10M; 1113 port->full_duplex = 0; 1114 break; 1115 case H_SPEED_10M_F: 1116 port->port_speed = EHEA_SPEED_10M; 1117 port->full_duplex = 1; 1118 break; 1119 case H_SPEED_100M_H: 1120 port->port_speed = EHEA_SPEED_100M; 1121 port->full_duplex = 0; 1122 break; 1123 case H_SPEED_100M_F: 1124 port->port_speed = EHEA_SPEED_100M; 1125 port->full_duplex = 1; 1126 break; 1127 case H_SPEED_1G_F: 1128 port->port_speed = EHEA_SPEED_1G; 1129 port->full_duplex = 1; 1130 break; 1131 case H_SPEED_10G_F: 1132 port->port_speed = EHEA_SPEED_10G; 1133 port->full_duplex = 1; 1134 break; 1135 default: 1136 port->port_speed = 0; 1137 port->full_duplex = 0; 1138 break; 1139 } 1140 } else { 1141 pr_err("Failed sensing port speed\n"); 1142 ret = -EIO; 1143 } 1144 } else { 1145 if (hret == H_AUTHORITY) { 1146 pr_info("Hypervisor denied setting port speed\n"); 1147 ret = -EPERM; 1148 } else { 1149 ret = -EIO; 1150 pr_err("Failed setting port speed\n"); 1151 } 1152 } 1153 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) 1154 netif_carrier_on(port->netdev); 1155 1156 free_page((unsigned long)cb4); 1157 out: 1158 return ret; 1159 } 1160 1161 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) 1162 { 1163 int ret; 1164 u8 ec; 1165 u8 portnum; 1166 struct ehea_port *port; 1167 struct net_device *dev; 1168 1169 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); 1170 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); 1171 port = ehea_get_port(adapter, portnum); 1172 dev = port->netdev; 1173 1174 switch (ec) { 1175 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1176 1177 if (!port) { 1178 netdev_err(dev, "unknown portnum %x\n", portnum); 1179 break; 1180 } 1181 1182 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1183 if (!netif_carrier_ok(dev)) { 1184 ret = ehea_sense_port_attr(port); 1185 if (ret) { 1186 netdev_err(dev, "failed resensing port attributes\n"); 1187 break; 1188 } 1189 1190 netif_info(port, link, dev, 1191 "Logical port up: %dMbps %s Duplex\n", 1192 port->port_speed, 1193 port->full_duplex == 1 ? 1194 "Full" : "Half"); 1195 1196 netif_carrier_on(dev); 1197 netif_wake_queue(dev); 1198 } 1199 } else 1200 if (netif_carrier_ok(dev)) { 1201 netif_info(port, link, dev, 1202 "Logical port down\n"); 1203 netif_carrier_off(dev); 1204 netif_tx_disable(dev); 1205 } 1206 1207 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1208 port->phy_link = EHEA_PHY_LINK_UP; 1209 netif_info(port, link, dev, 1210 "Physical port up\n"); 1211 if (prop_carrier_state) 1212 netif_carrier_on(dev); 1213 } else { 1214 port->phy_link = EHEA_PHY_LINK_DOWN; 1215 netif_info(port, link, dev, 1216 "Physical port down\n"); 1217 if (prop_carrier_state) 1218 netif_carrier_off(dev); 1219 } 1220 1221 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1222 netdev_info(dev, 1223 "External switch port is primary port\n"); 1224 else 1225 netdev_info(dev, 1226 "External switch port is backup port\n"); 1227 1228 break; 1229 case EHEA_EC_ADAPTER_MALFUNC: 1230 netdev_err(dev, "Adapter malfunction\n"); 1231 break; 1232 case EHEA_EC_PORT_MALFUNC: 1233 netdev_info(dev, "Port malfunction\n"); 1234 netif_carrier_off(dev); 1235 netif_tx_disable(dev); 1236 break; 1237 default: 1238 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1239 break; 1240 } 1241 } 1242 1243 static void ehea_neq_tasklet(unsigned long data) 1244 { 1245 struct ehea_adapter *adapter = (struct ehea_adapter *)data; 1246 struct ehea_eqe *eqe; 1247 u64 event_mask; 1248 1249 eqe = ehea_poll_eq(adapter->neq); 1250 pr_debug("eqe=%p\n", eqe); 1251 1252 while (eqe) { 1253 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1254 ehea_parse_eqe(adapter, eqe->entry); 1255 eqe = ehea_poll_eq(adapter->neq); 1256 pr_debug("next eqe=%p\n", eqe); 1257 } 1258 1259 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1260 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1261 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1262 1263 ehea_h_reset_events(adapter->handle, 1264 adapter->neq->fw_handle, event_mask); 1265 } 1266 1267 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1268 { 1269 struct ehea_adapter *adapter = param; 1270 tasklet_hi_schedule(&adapter->neq_tasklet); 1271 return IRQ_HANDLED; 1272 } 1273 1274 1275 static int ehea_fill_port_res(struct ehea_port_res *pr) 1276 { 1277 int ret; 1278 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1279 1280 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1281 1282 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1283 1284 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1285 1286 return ret; 1287 } 1288 1289 static int ehea_reg_interrupts(struct net_device *dev) 1290 { 1291 struct ehea_port *port = netdev_priv(dev); 1292 struct ehea_port_res *pr; 1293 int i, ret; 1294 1295 1296 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1297 dev->name); 1298 1299 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1300 ehea_qp_aff_irq_handler, 1301 0, port->int_aff_name, port); 1302 if (ret) { 1303 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1304 port->qp_eq->attr.ist1); 1305 goto out_free_qpeq; 1306 } 1307 1308 netif_info(port, ifup, dev, 1309 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1310 port->qp_eq->attr.ist1); 1311 1312 1313 for (i = 0; i < port->num_def_qps; i++) { 1314 pr = &port->port_res[i]; 1315 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1316 "%s-queue%d", dev->name, i); 1317 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1318 ehea_recv_irq_handler, 1319 0, pr->int_send_name, pr); 1320 if (ret) { 1321 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1322 i, pr->eq->attr.ist1); 1323 goto out_free_req; 1324 } 1325 netif_info(port, ifup, dev, 1326 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1327 pr->eq->attr.ist1, i); 1328 } 1329 out: 1330 return ret; 1331 1332 1333 out_free_req: 1334 while (--i >= 0) { 1335 u32 ist = port->port_res[i].eq->attr.ist1; 1336 ibmebus_free_irq(ist, &port->port_res[i]); 1337 } 1338 1339 out_free_qpeq: 1340 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1341 i = port->num_def_qps; 1342 1343 goto out; 1344 1345 } 1346 1347 static void ehea_free_interrupts(struct net_device *dev) 1348 { 1349 struct ehea_port *port = netdev_priv(dev); 1350 struct ehea_port_res *pr; 1351 int i; 1352 1353 /* send */ 1354 1355 for (i = 0; i < port->num_def_qps; i++) { 1356 pr = &port->port_res[i]; 1357 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1358 netif_info(port, intr, dev, 1359 "free send irq for res %d with handle 0x%X\n", 1360 i, pr->eq->attr.ist1); 1361 } 1362 1363 /* associated events */ 1364 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1365 netif_info(port, intr, dev, 1366 "associated event interrupt for handle 0x%X freed\n", 1367 port->qp_eq->attr.ist1); 1368 } 1369 1370 static int ehea_configure_port(struct ehea_port *port) 1371 { 1372 int ret, i; 1373 u64 hret, mask; 1374 struct hcp_ehea_port_cb0 *cb0; 1375 1376 ret = -ENOMEM; 1377 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1378 if (!cb0) 1379 goto out; 1380 1381 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1382 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1383 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1384 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1385 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1386 PXLY_RC_VLAN_FILTER) 1387 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1388 1389 for (i = 0; i < port->num_mcs; i++) 1390 if (use_mcs) 1391 cb0->default_qpn_arr[i] = 1392 port->port_res[i].qp->init_attr.qp_nr; 1393 else 1394 cb0->default_qpn_arr[i] = 1395 port->port_res[0].qp->init_attr.qp_nr; 1396 1397 if (netif_msg_ifup(port)) 1398 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1399 1400 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1401 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1402 1403 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1404 port->logical_port_id, 1405 H_PORT_CB0, mask, cb0); 1406 ret = -EIO; 1407 if (hret != H_SUCCESS) 1408 goto out_free; 1409 1410 ret = 0; 1411 1412 out_free: 1413 free_page((unsigned long)cb0); 1414 out: 1415 return ret; 1416 } 1417 1418 static int ehea_gen_smrs(struct ehea_port_res *pr) 1419 { 1420 int ret; 1421 struct ehea_adapter *adapter = pr->port->adapter; 1422 1423 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1424 if (ret) 1425 goto out; 1426 1427 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1428 if (ret) 1429 goto out_free; 1430 1431 return 0; 1432 1433 out_free: 1434 ehea_rem_mr(&pr->send_mr); 1435 out: 1436 pr_err("Generating SMRS failed\n"); 1437 return -EIO; 1438 } 1439 1440 static int ehea_rem_smrs(struct ehea_port_res *pr) 1441 { 1442 if ((ehea_rem_mr(&pr->send_mr)) || 1443 (ehea_rem_mr(&pr->recv_mr))) 1444 return -EIO; 1445 else 1446 return 0; 1447 } 1448 1449 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1450 { 1451 int arr_size = sizeof(void *) * max_q_entries; 1452 1453 q_skba->arr = vzalloc(arr_size); 1454 if (!q_skba->arr) 1455 return -ENOMEM; 1456 1457 q_skba->len = max_q_entries; 1458 q_skba->index = 0; 1459 q_skba->os_skbs = 0; 1460 1461 return 0; 1462 } 1463 1464 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1465 struct port_res_cfg *pr_cfg, int queue_token) 1466 { 1467 struct ehea_adapter *adapter = port->adapter; 1468 enum ehea_eq_type eq_type = EHEA_EQ; 1469 struct ehea_qp_init_attr *init_attr = NULL; 1470 int ret = -EIO; 1471 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1472 1473 tx_bytes = pr->tx_bytes; 1474 tx_packets = pr->tx_packets; 1475 rx_bytes = pr->rx_bytes; 1476 rx_packets = pr->rx_packets; 1477 1478 memset(pr, 0, sizeof(struct ehea_port_res)); 1479 1480 pr->tx_bytes = rx_bytes; 1481 pr->tx_packets = tx_packets; 1482 pr->rx_bytes = rx_bytes; 1483 pr->rx_packets = rx_packets; 1484 1485 pr->port = port; 1486 1487 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1488 if (!pr->eq) { 1489 pr_err("create_eq failed (eq)\n"); 1490 goto out_free; 1491 } 1492 1493 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1494 pr->eq->fw_handle, 1495 port->logical_port_id); 1496 if (!pr->recv_cq) { 1497 pr_err("create_cq failed (cq_recv)\n"); 1498 goto out_free; 1499 } 1500 1501 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1502 pr->eq->fw_handle, 1503 port->logical_port_id); 1504 if (!pr->send_cq) { 1505 pr_err("create_cq failed (cq_send)\n"); 1506 goto out_free; 1507 } 1508 1509 if (netif_msg_ifup(port)) 1510 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1511 pr->send_cq->attr.act_nr_of_cqes, 1512 pr->recv_cq->attr.act_nr_of_cqes); 1513 1514 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1515 if (!init_attr) { 1516 ret = -ENOMEM; 1517 pr_err("no mem for ehea_qp_init_attr\n"); 1518 goto out_free; 1519 } 1520 1521 init_attr->low_lat_rq1 = 1; 1522 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1523 init_attr->rq_count = 3; 1524 init_attr->qp_token = queue_token; 1525 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1526 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1527 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1528 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1529 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1530 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1531 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1532 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1533 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1534 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1535 init_attr->port_nr = port->logical_port_id; 1536 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1537 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1538 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1539 1540 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1541 if (!pr->qp) { 1542 pr_err("create_qp failed\n"); 1543 ret = -EIO; 1544 goto out_free; 1545 } 1546 1547 if (netif_msg_ifup(port)) 1548 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", 1549 init_attr->qp_nr, 1550 init_attr->act_nr_send_wqes, 1551 init_attr->act_nr_rwqes_rq1, 1552 init_attr->act_nr_rwqes_rq2, 1553 init_attr->act_nr_rwqes_rq3); 1554 1555 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1556 1557 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1558 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1559 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1560 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1561 if (ret) 1562 goto out_free; 1563 1564 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1565 if (ehea_gen_smrs(pr) != 0) { 1566 ret = -EIO; 1567 goto out_free; 1568 } 1569 1570 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1571 1572 kfree(init_attr); 1573 1574 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); 1575 1576 ret = 0; 1577 goto out; 1578 1579 out_free: 1580 kfree(init_attr); 1581 vfree(pr->sq_skba.arr); 1582 vfree(pr->rq1_skba.arr); 1583 vfree(pr->rq2_skba.arr); 1584 vfree(pr->rq3_skba.arr); 1585 ehea_destroy_qp(pr->qp); 1586 ehea_destroy_cq(pr->send_cq); 1587 ehea_destroy_cq(pr->recv_cq); 1588 ehea_destroy_eq(pr->eq); 1589 out: 1590 return ret; 1591 } 1592 1593 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1594 { 1595 int ret, i; 1596 1597 if (pr->qp) 1598 netif_napi_del(&pr->napi); 1599 1600 ret = ehea_destroy_qp(pr->qp); 1601 1602 if (!ret) { 1603 ehea_destroy_cq(pr->send_cq); 1604 ehea_destroy_cq(pr->recv_cq); 1605 ehea_destroy_eq(pr->eq); 1606 1607 for (i = 0; i < pr->rq1_skba.len; i++) 1608 if (pr->rq1_skba.arr[i]) 1609 dev_kfree_skb(pr->rq1_skba.arr[i]); 1610 1611 for (i = 0; i < pr->rq2_skba.len; i++) 1612 if (pr->rq2_skba.arr[i]) 1613 dev_kfree_skb(pr->rq2_skba.arr[i]); 1614 1615 for (i = 0; i < pr->rq3_skba.len; i++) 1616 if (pr->rq3_skba.arr[i]) 1617 dev_kfree_skb(pr->rq3_skba.arr[i]); 1618 1619 for (i = 0; i < pr->sq_skba.len; i++) 1620 if (pr->sq_skba.arr[i]) 1621 dev_kfree_skb(pr->sq_skba.arr[i]); 1622 1623 vfree(pr->rq1_skba.arr); 1624 vfree(pr->rq2_skba.arr); 1625 vfree(pr->rq3_skba.arr); 1626 vfree(pr->sq_skba.arr); 1627 ret = ehea_rem_smrs(pr); 1628 } 1629 return ret; 1630 } 1631 1632 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1633 u32 lkey) 1634 { 1635 int skb_data_size = skb_headlen(skb); 1636 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1637 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1638 unsigned int immediate_len = SWQE2_MAX_IMM; 1639 1640 swqe->descriptors = 0; 1641 1642 if (skb_is_gso(skb)) { 1643 swqe->tx_control |= EHEA_SWQE_TSO; 1644 swqe->mss = skb_shinfo(skb)->gso_size; 1645 /* 1646 * For TSO packets we only copy the headers into the 1647 * immediate area. 1648 */ 1649 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb); 1650 } 1651 1652 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1653 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1654 swqe->immediate_data_length = immediate_len; 1655 1656 if (skb_data_size > immediate_len) { 1657 sg1entry->l_key = lkey; 1658 sg1entry->len = skb_data_size - immediate_len; 1659 sg1entry->vaddr = 1660 ehea_map_vaddr(skb->data + immediate_len); 1661 swqe->descriptors++; 1662 } 1663 } else { 1664 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1665 swqe->immediate_data_length = skb_data_size; 1666 } 1667 } 1668 1669 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1670 struct ehea_swqe *swqe, u32 lkey) 1671 { 1672 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1673 skb_frag_t *frag; 1674 int nfrags, sg1entry_contains_frag_data, i; 1675 1676 nfrags = skb_shinfo(skb)->nr_frags; 1677 sg1entry = &swqe->u.immdata_desc.sg_entry; 1678 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1679 sg1entry_contains_frag_data = 0; 1680 1681 write_swqe2_immediate(skb, swqe, lkey); 1682 1683 /* write descriptors */ 1684 if (nfrags > 0) { 1685 if (swqe->descriptors == 0) { 1686 /* sg1entry not yet used */ 1687 frag = &skb_shinfo(skb)->frags[0]; 1688 1689 /* copy sg1entry data */ 1690 sg1entry->l_key = lkey; 1691 sg1entry->len = skb_frag_size(frag); 1692 sg1entry->vaddr = 1693 ehea_map_vaddr(skb_frag_address(frag)); 1694 swqe->descriptors++; 1695 sg1entry_contains_frag_data = 1; 1696 } 1697 1698 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1699 1700 frag = &skb_shinfo(skb)->frags[i]; 1701 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1702 1703 sgentry->l_key = lkey; 1704 sgentry->len = skb_frag_size(frag); 1705 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1706 swqe->descriptors++; 1707 } 1708 } 1709 } 1710 1711 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1712 { 1713 int ret = 0; 1714 u64 hret; 1715 u8 reg_type; 1716 1717 /* De/Register untagged packets */ 1718 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1719 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1720 port->logical_port_id, 1721 reg_type, port->mac_addr, 0, hcallid); 1722 if (hret != H_SUCCESS) { 1723 pr_err("%sregistering bc address failed (tagged)\n", 1724 hcallid == H_REG_BCMC ? "" : "de"); 1725 ret = -EIO; 1726 goto out_herr; 1727 } 1728 1729 /* De/Register VLAN packets */ 1730 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1731 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1732 port->logical_port_id, 1733 reg_type, port->mac_addr, 0, hcallid); 1734 if (hret != H_SUCCESS) { 1735 pr_err("%sregistering bc address failed (vlan)\n", 1736 hcallid == H_REG_BCMC ? "" : "de"); 1737 ret = -EIO; 1738 } 1739 out_herr: 1740 return ret; 1741 } 1742 1743 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1744 { 1745 struct ehea_port *port = netdev_priv(dev); 1746 struct sockaddr *mac_addr = sa; 1747 struct hcp_ehea_port_cb0 *cb0; 1748 int ret; 1749 u64 hret; 1750 1751 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1752 ret = -EADDRNOTAVAIL; 1753 goto out; 1754 } 1755 1756 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1757 if (!cb0) { 1758 pr_err("no mem for cb0\n"); 1759 ret = -ENOMEM; 1760 goto out; 1761 } 1762 1763 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1764 1765 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1766 1767 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1768 port->logical_port_id, H_PORT_CB0, 1769 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1770 if (hret != H_SUCCESS) { 1771 ret = -EIO; 1772 goto out_free; 1773 } 1774 1775 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); 1776 1777 /* Deregister old MAC in pHYP */ 1778 if (port->state == EHEA_PORT_UP) { 1779 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1780 if (ret) 1781 goto out_upregs; 1782 } 1783 1784 port->mac_addr = cb0->port_mac_addr << 16; 1785 1786 /* Register new MAC in pHYP */ 1787 if (port->state == EHEA_PORT_UP) { 1788 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1789 if (ret) 1790 goto out_upregs; 1791 } 1792 1793 ret = 0; 1794 1795 out_upregs: 1796 ehea_update_bcmc_registrations(); 1797 out_free: 1798 free_page((unsigned long)cb0); 1799 out: 1800 return ret; 1801 } 1802 1803 static void ehea_promiscuous_error(u64 hret, int enable) 1804 { 1805 if (hret == H_AUTHORITY) 1806 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1807 enable == 1 ? "en" : "dis"); 1808 else 1809 pr_err("failed %sabling promiscuous mode\n", 1810 enable == 1 ? "en" : "dis"); 1811 } 1812 1813 static void ehea_promiscuous(struct net_device *dev, int enable) 1814 { 1815 struct ehea_port *port = netdev_priv(dev); 1816 struct hcp_ehea_port_cb7 *cb7; 1817 u64 hret; 1818 1819 if (enable == port->promisc) 1820 return; 1821 1822 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1823 if (!cb7) { 1824 pr_err("no mem for cb7\n"); 1825 goto out; 1826 } 1827 1828 /* Modify Pxs_DUCQPN in CB7 */ 1829 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1830 1831 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1832 port->logical_port_id, 1833 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1834 if (hret) { 1835 ehea_promiscuous_error(hret, enable); 1836 goto out; 1837 } 1838 1839 port->promisc = enable; 1840 out: 1841 free_page((unsigned long)cb7); 1842 } 1843 1844 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1845 u32 hcallid) 1846 { 1847 u64 hret; 1848 u8 reg_type; 1849 1850 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; 1851 if (mc_mac_addr == 0) 1852 reg_type |= EHEA_BCMC_SCOPE_ALL; 1853 1854 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1855 port->logical_port_id, 1856 reg_type, mc_mac_addr, 0, hcallid); 1857 if (hret) 1858 goto out; 1859 1860 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL; 1861 if (mc_mac_addr == 0) 1862 reg_type |= EHEA_BCMC_SCOPE_ALL; 1863 1864 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1865 port->logical_port_id, 1866 reg_type, mc_mac_addr, 0, hcallid); 1867 out: 1868 return hret; 1869 } 1870 1871 static int ehea_drop_multicast_list(struct net_device *dev) 1872 { 1873 struct ehea_port *port = netdev_priv(dev); 1874 struct ehea_mc_list *mc_entry = port->mc_list; 1875 struct list_head *pos; 1876 struct list_head *temp; 1877 int ret = 0; 1878 u64 hret; 1879 1880 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1881 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1882 1883 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1884 H_DEREG_BCMC); 1885 if (hret) { 1886 pr_err("failed deregistering mcast MAC\n"); 1887 ret = -EIO; 1888 } 1889 1890 list_del(pos); 1891 kfree(mc_entry); 1892 } 1893 return ret; 1894 } 1895 1896 static void ehea_allmulti(struct net_device *dev, int enable) 1897 { 1898 struct ehea_port *port = netdev_priv(dev); 1899 u64 hret; 1900 1901 if (!port->allmulti) { 1902 if (enable) { 1903 /* Enable ALLMULTI */ 1904 ehea_drop_multicast_list(dev); 1905 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1906 if (!hret) 1907 port->allmulti = 1; 1908 else 1909 netdev_err(dev, 1910 "failed enabling IFF_ALLMULTI\n"); 1911 } 1912 } else { 1913 if (!enable) { 1914 /* Disable ALLMULTI */ 1915 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1916 if (!hret) 1917 port->allmulti = 0; 1918 else 1919 netdev_err(dev, 1920 "failed disabling IFF_ALLMULTI\n"); 1921 } 1922 } 1923 } 1924 1925 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1926 { 1927 struct ehea_mc_list *ehea_mcl_entry; 1928 u64 hret; 1929 1930 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1931 if (!ehea_mcl_entry) 1932 return; 1933 1934 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1935 1936 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1937 1938 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1939 H_REG_BCMC); 1940 if (!hret) 1941 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1942 else { 1943 pr_err("failed registering mcast MAC\n"); 1944 kfree(ehea_mcl_entry); 1945 } 1946 } 1947 1948 static void ehea_set_multicast_list(struct net_device *dev) 1949 { 1950 struct ehea_port *port = netdev_priv(dev); 1951 struct netdev_hw_addr *ha; 1952 int ret; 1953 1954 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC)); 1955 1956 if (dev->flags & IFF_ALLMULTI) { 1957 ehea_allmulti(dev, 1); 1958 goto out; 1959 } 1960 ehea_allmulti(dev, 0); 1961 1962 if (!netdev_mc_empty(dev)) { 1963 ret = ehea_drop_multicast_list(dev); 1964 if (ret) { 1965 /* Dropping the current multicast list failed. 1966 * Enabling ALL_MULTI is the best we can do. 1967 */ 1968 ehea_allmulti(dev, 1); 1969 } 1970 1971 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1972 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1973 port->adapter->max_mc_mac); 1974 goto out; 1975 } 1976 1977 netdev_for_each_mc_addr(ha, dev) 1978 ehea_add_multicast_entry(port, ha->addr); 1979 1980 } 1981 out: 1982 ehea_update_bcmc_registrations(); 1983 } 1984 1985 static int ehea_change_mtu(struct net_device *dev, int new_mtu) 1986 { 1987 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE)) 1988 return -EINVAL; 1989 dev->mtu = new_mtu; 1990 return 0; 1991 } 1992 1993 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1994 { 1995 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1996 1997 if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 1998 return; 1999 2000 if (skb->ip_summed == CHECKSUM_PARTIAL) 2001 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 2002 2003 swqe->ip_start = skb_network_offset(skb); 2004 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 2005 2006 switch (ip_hdr(skb)->protocol) { 2007 case IPPROTO_UDP: 2008 if (skb->ip_summed == CHECKSUM_PARTIAL) 2009 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2010 2011 swqe->tcp_offset = swqe->ip_end + 1 + 2012 offsetof(struct udphdr, check); 2013 break; 2014 2015 case IPPROTO_TCP: 2016 if (skb->ip_summed == CHECKSUM_PARTIAL) 2017 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2018 2019 swqe->tcp_offset = swqe->ip_end + 1 + 2020 offsetof(struct tcphdr, check); 2021 break; 2022 } 2023 } 2024 2025 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 2026 struct ehea_swqe *swqe, u32 lkey) 2027 { 2028 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 2029 2030 xmit_common(skb, swqe); 2031 2032 write_swqe2_data(skb, dev, swqe, lkey); 2033 } 2034 2035 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 2036 struct ehea_swqe *swqe) 2037 { 2038 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2039 2040 xmit_common(skb, swqe); 2041 2042 if (!skb->data_len) 2043 skb_copy_from_linear_data(skb, imm_data, skb->len); 2044 else 2045 skb_copy_bits(skb, 0, imm_data, skb->len); 2046 2047 swqe->immediate_data_length = skb->len; 2048 dev_consume_skb_any(skb); 2049 } 2050 2051 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2052 { 2053 struct ehea_port *port = netdev_priv(dev); 2054 struct ehea_swqe *swqe; 2055 u32 lkey; 2056 int swqe_index; 2057 struct ehea_port_res *pr; 2058 struct netdev_queue *txq; 2059 2060 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2061 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2062 2063 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2064 memset(swqe, 0, SWQE_HEADER_SIZE); 2065 atomic_dec(&pr->swqe_avail); 2066 2067 if (skb_vlan_tag_present(skb)) { 2068 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2069 swqe->vlan_tag = skb_vlan_tag_get(skb); 2070 } 2071 2072 pr->tx_packets++; 2073 pr->tx_bytes += skb->len; 2074 2075 if (skb->len <= SWQE3_MAX_IMM) { 2076 u32 sig_iv = port->sig_comp_iv; 2077 u32 swqe_num = pr->swqe_id_counter; 2078 ehea_xmit3(skb, dev, swqe); 2079 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2080 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2081 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2082 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2083 sig_iv); 2084 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2085 pr->swqe_ll_count = 0; 2086 } else 2087 pr->swqe_ll_count += 1; 2088 } else { 2089 swqe->wr_id = 2090 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2091 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2092 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2093 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2094 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2095 2096 pr->sq_skba.index++; 2097 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2098 2099 lkey = pr->send_mr.lkey; 2100 ehea_xmit2(skb, dev, swqe, lkey); 2101 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2102 } 2103 pr->swqe_id_counter += 1; 2104 2105 netif_info(port, tx_queued, dev, 2106 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2107 if (netif_msg_tx_queued(port)) 2108 ehea_dump(swqe, 512, "swqe"); 2109 2110 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2111 netif_tx_stop_queue(txq); 2112 swqe->tx_control |= EHEA_SWQE_PURGE; 2113 } 2114 2115 ehea_post_swqe(pr->qp, swqe); 2116 2117 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2118 pr->p_stats.queue_stopped++; 2119 netif_tx_stop_queue(txq); 2120 } 2121 2122 return NETDEV_TX_OK; 2123 } 2124 2125 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2126 { 2127 struct ehea_port *port = netdev_priv(dev); 2128 struct ehea_adapter *adapter = port->adapter; 2129 struct hcp_ehea_port_cb1 *cb1; 2130 int index; 2131 u64 hret; 2132 int err = 0; 2133 2134 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2135 if (!cb1) { 2136 pr_err("no mem for cb1\n"); 2137 err = -ENOMEM; 2138 goto out; 2139 } 2140 2141 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2142 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2143 if (hret != H_SUCCESS) { 2144 pr_err("query_ehea_port failed\n"); 2145 err = -EINVAL; 2146 goto out; 2147 } 2148 2149 index = (vid / 64); 2150 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2151 2152 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2153 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2154 if (hret != H_SUCCESS) { 2155 pr_err("modify_ehea_port failed\n"); 2156 err = -EINVAL; 2157 } 2158 out: 2159 free_page((unsigned long)cb1); 2160 return err; 2161 } 2162 2163 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2164 { 2165 struct ehea_port *port = netdev_priv(dev); 2166 struct ehea_adapter *adapter = port->adapter; 2167 struct hcp_ehea_port_cb1 *cb1; 2168 int index; 2169 u64 hret; 2170 int err = 0; 2171 2172 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2173 if (!cb1) { 2174 pr_err("no mem for cb1\n"); 2175 err = -ENOMEM; 2176 goto out; 2177 } 2178 2179 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2180 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2181 if (hret != H_SUCCESS) { 2182 pr_err("query_ehea_port failed\n"); 2183 err = -EINVAL; 2184 goto out; 2185 } 2186 2187 index = (vid / 64); 2188 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2189 2190 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2191 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2192 if (hret != H_SUCCESS) { 2193 pr_err("modify_ehea_port failed\n"); 2194 err = -EINVAL; 2195 } 2196 out: 2197 free_page((unsigned long)cb1); 2198 return err; 2199 } 2200 2201 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2202 { 2203 int ret = -EIO; 2204 u64 hret; 2205 u16 dummy16 = 0; 2206 u64 dummy64 = 0; 2207 struct hcp_modify_qp_cb0 *cb0; 2208 2209 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2210 if (!cb0) { 2211 ret = -ENOMEM; 2212 goto out; 2213 } 2214 2215 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2216 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2217 if (hret != H_SUCCESS) { 2218 pr_err("query_ehea_qp failed (1)\n"); 2219 goto out; 2220 } 2221 2222 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2223 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2224 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2225 &dummy64, &dummy64, &dummy16, &dummy16); 2226 if (hret != H_SUCCESS) { 2227 pr_err("modify_ehea_qp failed (1)\n"); 2228 goto out; 2229 } 2230 2231 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2232 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2233 if (hret != H_SUCCESS) { 2234 pr_err("query_ehea_qp failed (2)\n"); 2235 goto out; 2236 } 2237 2238 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2239 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2240 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2241 &dummy64, &dummy64, &dummy16, &dummy16); 2242 if (hret != H_SUCCESS) { 2243 pr_err("modify_ehea_qp failed (2)\n"); 2244 goto out; 2245 } 2246 2247 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2248 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2249 if (hret != H_SUCCESS) { 2250 pr_err("query_ehea_qp failed (3)\n"); 2251 goto out; 2252 } 2253 2254 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2255 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2256 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2257 &dummy64, &dummy64, &dummy16, &dummy16); 2258 if (hret != H_SUCCESS) { 2259 pr_err("modify_ehea_qp failed (3)\n"); 2260 goto out; 2261 } 2262 2263 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2264 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2265 if (hret != H_SUCCESS) { 2266 pr_err("query_ehea_qp failed (4)\n"); 2267 goto out; 2268 } 2269 2270 ret = 0; 2271 out: 2272 free_page((unsigned long)cb0); 2273 return ret; 2274 } 2275 2276 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2277 { 2278 int ret, i; 2279 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2280 enum ehea_eq_type eq_type = EHEA_EQ; 2281 2282 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2283 EHEA_MAX_ENTRIES_EQ, 1); 2284 if (!port->qp_eq) { 2285 ret = -EINVAL; 2286 pr_err("ehea_create_eq failed (qp_eq)\n"); 2287 goto out_kill_eq; 2288 } 2289 2290 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2291 pr_cfg.max_entries_scq = sq_entries * 2; 2292 pr_cfg.max_entries_sq = sq_entries; 2293 pr_cfg.max_entries_rq1 = rq1_entries; 2294 pr_cfg.max_entries_rq2 = rq2_entries; 2295 pr_cfg.max_entries_rq3 = rq3_entries; 2296 2297 pr_cfg_small_rx.max_entries_rcq = 1; 2298 pr_cfg_small_rx.max_entries_scq = sq_entries; 2299 pr_cfg_small_rx.max_entries_sq = sq_entries; 2300 pr_cfg_small_rx.max_entries_rq1 = 1; 2301 pr_cfg_small_rx.max_entries_rq2 = 1; 2302 pr_cfg_small_rx.max_entries_rq3 = 1; 2303 2304 for (i = 0; i < def_qps; i++) { 2305 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2306 if (ret) 2307 goto out_clean_pr; 2308 } 2309 for (i = def_qps; i < def_qps; i++) { 2310 ret = ehea_init_port_res(port, &port->port_res[i], 2311 &pr_cfg_small_rx, i); 2312 if (ret) 2313 goto out_clean_pr; 2314 } 2315 2316 return 0; 2317 2318 out_clean_pr: 2319 while (--i >= 0) 2320 ehea_clean_portres(port, &port->port_res[i]); 2321 2322 out_kill_eq: 2323 ehea_destroy_eq(port->qp_eq); 2324 return ret; 2325 } 2326 2327 static int ehea_clean_all_portres(struct ehea_port *port) 2328 { 2329 int ret = 0; 2330 int i; 2331 2332 for (i = 0; i < port->num_def_qps; i++) 2333 ret |= ehea_clean_portres(port, &port->port_res[i]); 2334 2335 ret |= ehea_destroy_eq(port->qp_eq); 2336 2337 return ret; 2338 } 2339 2340 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2341 { 2342 if (adapter->active_ports) 2343 return; 2344 2345 ehea_rem_mr(&adapter->mr); 2346 } 2347 2348 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2349 { 2350 if (adapter->active_ports) 2351 return 0; 2352 2353 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2354 } 2355 2356 static int ehea_up(struct net_device *dev) 2357 { 2358 int ret, i; 2359 struct ehea_port *port = netdev_priv(dev); 2360 2361 if (port->state == EHEA_PORT_UP) 2362 return 0; 2363 2364 ret = ehea_port_res_setup(port, port->num_def_qps); 2365 if (ret) { 2366 netdev_err(dev, "port_res_failed\n"); 2367 goto out; 2368 } 2369 2370 /* Set default QP for this port */ 2371 ret = ehea_configure_port(port); 2372 if (ret) { 2373 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2374 goto out_clean_pr; 2375 } 2376 2377 ret = ehea_reg_interrupts(dev); 2378 if (ret) { 2379 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2380 goto out_clean_pr; 2381 } 2382 2383 for (i = 0; i < port->num_def_qps; i++) { 2384 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2385 if (ret) { 2386 netdev_err(dev, "activate_qp failed\n"); 2387 goto out_free_irqs; 2388 } 2389 } 2390 2391 for (i = 0; i < port->num_def_qps; i++) { 2392 ret = ehea_fill_port_res(&port->port_res[i]); 2393 if (ret) { 2394 netdev_err(dev, "out_free_irqs\n"); 2395 goto out_free_irqs; 2396 } 2397 } 2398 2399 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2400 if (ret) { 2401 ret = -EIO; 2402 goto out_free_irqs; 2403 } 2404 2405 port->state = EHEA_PORT_UP; 2406 2407 ret = 0; 2408 goto out; 2409 2410 out_free_irqs: 2411 ehea_free_interrupts(dev); 2412 2413 out_clean_pr: 2414 ehea_clean_all_portres(port); 2415 out: 2416 if (ret) 2417 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2418 2419 ehea_update_bcmc_registrations(); 2420 ehea_update_firmware_handles(); 2421 2422 return ret; 2423 } 2424 2425 static void port_napi_disable(struct ehea_port *port) 2426 { 2427 int i; 2428 2429 for (i = 0; i < port->num_def_qps; i++) 2430 napi_disable(&port->port_res[i].napi); 2431 } 2432 2433 static void port_napi_enable(struct ehea_port *port) 2434 { 2435 int i; 2436 2437 for (i = 0; i < port->num_def_qps; i++) 2438 napi_enable(&port->port_res[i].napi); 2439 } 2440 2441 static int ehea_open(struct net_device *dev) 2442 { 2443 int ret; 2444 struct ehea_port *port = netdev_priv(dev); 2445 2446 mutex_lock(&port->port_lock); 2447 2448 netif_info(port, ifup, dev, "enabling port\n"); 2449 2450 ret = ehea_up(dev); 2451 if (!ret) { 2452 port_napi_enable(port); 2453 netif_tx_start_all_queues(dev); 2454 } 2455 2456 mutex_unlock(&port->port_lock); 2457 schedule_delayed_work(&port->stats_work, 2458 round_jiffies_relative(msecs_to_jiffies(1000))); 2459 2460 return ret; 2461 } 2462 2463 static int ehea_down(struct net_device *dev) 2464 { 2465 int ret; 2466 struct ehea_port *port = netdev_priv(dev); 2467 2468 if (port->state == EHEA_PORT_DOWN) 2469 return 0; 2470 2471 ehea_drop_multicast_list(dev); 2472 ehea_allmulti(dev, 0); 2473 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2474 2475 ehea_free_interrupts(dev); 2476 2477 port->state = EHEA_PORT_DOWN; 2478 2479 ehea_update_bcmc_registrations(); 2480 2481 ret = ehea_clean_all_portres(port); 2482 if (ret) 2483 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2484 2485 ehea_update_firmware_handles(); 2486 2487 return ret; 2488 } 2489 2490 static int ehea_stop(struct net_device *dev) 2491 { 2492 int ret; 2493 struct ehea_port *port = netdev_priv(dev); 2494 2495 netif_info(port, ifdown, dev, "disabling port\n"); 2496 2497 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2498 cancel_work_sync(&port->reset_task); 2499 cancel_delayed_work_sync(&port->stats_work); 2500 mutex_lock(&port->port_lock); 2501 netif_tx_stop_all_queues(dev); 2502 port_napi_disable(port); 2503 ret = ehea_down(dev); 2504 mutex_unlock(&port->port_lock); 2505 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2506 return ret; 2507 } 2508 2509 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2510 { 2511 struct ehea_qp qp = *orig_qp; 2512 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2513 struct ehea_swqe *swqe; 2514 int wqe_index; 2515 int i; 2516 2517 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2518 swqe = ehea_get_swqe(&qp, &wqe_index); 2519 swqe->tx_control |= EHEA_SWQE_PURGE; 2520 } 2521 } 2522 2523 static void ehea_flush_sq(struct ehea_port *port) 2524 { 2525 int i; 2526 2527 for (i = 0; i < port->num_def_qps; i++) { 2528 struct ehea_port_res *pr = &port->port_res[i]; 2529 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2530 int ret; 2531 2532 ret = wait_event_timeout(port->swqe_avail_wq, 2533 atomic_read(&pr->swqe_avail) >= swqe_max, 2534 msecs_to_jiffies(100)); 2535 2536 if (!ret) { 2537 pr_err("WARNING: sq not flushed completely\n"); 2538 break; 2539 } 2540 } 2541 } 2542 2543 static int ehea_stop_qps(struct net_device *dev) 2544 { 2545 struct ehea_port *port = netdev_priv(dev); 2546 struct ehea_adapter *adapter = port->adapter; 2547 struct hcp_modify_qp_cb0 *cb0; 2548 int ret = -EIO; 2549 int dret; 2550 int i; 2551 u64 hret; 2552 u64 dummy64 = 0; 2553 u16 dummy16 = 0; 2554 2555 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2556 if (!cb0) { 2557 ret = -ENOMEM; 2558 goto out; 2559 } 2560 2561 for (i = 0; i < (port->num_def_qps); i++) { 2562 struct ehea_port_res *pr = &port->port_res[i]; 2563 struct ehea_qp *qp = pr->qp; 2564 2565 /* Purge send queue */ 2566 ehea_purge_sq(qp); 2567 2568 /* Disable queue pair */ 2569 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2570 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2571 cb0); 2572 if (hret != H_SUCCESS) { 2573 pr_err("query_ehea_qp failed (1)\n"); 2574 goto out; 2575 } 2576 2577 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2578 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2579 2580 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2581 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2582 1), cb0, &dummy64, 2583 &dummy64, &dummy16, &dummy16); 2584 if (hret != H_SUCCESS) { 2585 pr_err("modify_ehea_qp failed (1)\n"); 2586 goto out; 2587 } 2588 2589 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2590 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2591 cb0); 2592 if (hret != H_SUCCESS) { 2593 pr_err("query_ehea_qp failed (2)\n"); 2594 goto out; 2595 } 2596 2597 /* deregister shared memory regions */ 2598 dret = ehea_rem_smrs(pr); 2599 if (dret) { 2600 pr_err("unreg shared memory region failed\n"); 2601 goto out; 2602 } 2603 } 2604 2605 ret = 0; 2606 out: 2607 free_page((unsigned long)cb0); 2608 2609 return ret; 2610 } 2611 2612 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2613 { 2614 struct ehea_qp qp = *orig_qp; 2615 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2616 struct ehea_rwqe *rwqe; 2617 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2618 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2619 struct sk_buff *skb; 2620 u32 lkey = pr->recv_mr.lkey; 2621 2622 2623 int i; 2624 int index; 2625 2626 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2627 rwqe = ehea_get_next_rwqe(&qp, 2); 2628 rwqe->sg_list[0].l_key = lkey; 2629 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2630 skb = skba_rq2[index]; 2631 if (skb) 2632 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2633 } 2634 2635 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2636 rwqe = ehea_get_next_rwqe(&qp, 3); 2637 rwqe->sg_list[0].l_key = lkey; 2638 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2639 skb = skba_rq3[index]; 2640 if (skb) 2641 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2642 } 2643 } 2644 2645 static int ehea_restart_qps(struct net_device *dev) 2646 { 2647 struct ehea_port *port = netdev_priv(dev); 2648 struct ehea_adapter *adapter = port->adapter; 2649 int ret = 0; 2650 int i; 2651 2652 struct hcp_modify_qp_cb0 *cb0; 2653 u64 hret; 2654 u64 dummy64 = 0; 2655 u16 dummy16 = 0; 2656 2657 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2658 if (!cb0) { 2659 ret = -ENOMEM; 2660 goto out; 2661 } 2662 2663 for (i = 0; i < (port->num_def_qps); i++) { 2664 struct ehea_port_res *pr = &port->port_res[i]; 2665 struct ehea_qp *qp = pr->qp; 2666 2667 ret = ehea_gen_smrs(pr); 2668 if (ret) { 2669 netdev_err(dev, "creation of shared memory regions failed\n"); 2670 goto out; 2671 } 2672 2673 ehea_update_rqs(qp, pr); 2674 2675 /* Enable queue pair */ 2676 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2677 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2678 cb0); 2679 if (hret != H_SUCCESS) { 2680 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2681 goto out; 2682 } 2683 2684 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2685 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2686 2687 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2688 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2689 1), cb0, &dummy64, 2690 &dummy64, &dummy16, &dummy16); 2691 if (hret != H_SUCCESS) { 2692 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2693 goto out; 2694 } 2695 2696 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2697 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2698 cb0); 2699 if (hret != H_SUCCESS) { 2700 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2701 goto out; 2702 } 2703 2704 /* refill entire queue */ 2705 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2706 ehea_refill_rq2(pr, 0); 2707 ehea_refill_rq3(pr, 0); 2708 } 2709 out: 2710 free_page((unsigned long)cb0); 2711 2712 return ret; 2713 } 2714 2715 static void ehea_reset_port(struct work_struct *work) 2716 { 2717 int ret; 2718 struct ehea_port *port = 2719 container_of(work, struct ehea_port, reset_task); 2720 struct net_device *dev = port->netdev; 2721 2722 mutex_lock(&dlpar_mem_lock); 2723 port->resets++; 2724 mutex_lock(&port->port_lock); 2725 netif_tx_disable(dev); 2726 2727 port_napi_disable(port); 2728 2729 ehea_down(dev); 2730 2731 ret = ehea_up(dev); 2732 if (ret) 2733 goto out; 2734 2735 ehea_set_multicast_list(dev); 2736 2737 netif_info(port, timer, dev, "reset successful\n"); 2738 2739 port_napi_enable(port); 2740 2741 netif_tx_wake_all_queues(dev); 2742 out: 2743 mutex_unlock(&port->port_lock); 2744 mutex_unlock(&dlpar_mem_lock); 2745 } 2746 2747 static void ehea_rereg_mrs(void) 2748 { 2749 int ret, i; 2750 struct ehea_adapter *adapter; 2751 2752 pr_info("LPAR memory changed - re-initializing driver\n"); 2753 2754 list_for_each_entry(adapter, &adapter_list, list) 2755 if (adapter->active_ports) { 2756 /* Shutdown all ports */ 2757 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2758 struct ehea_port *port = adapter->port[i]; 2759 struct net_device *dev; 2760 2761 if (!port) 2762 continue; 2763 2764 dev = port->netdev; 2765 2766 if (dev->flags & IFF_UP) { 2767 mutex_lock(&port->port_lock); 2768 netif_tx_disable(dev); 2769 ehea_flush_sq(port); 2770 ret = ehea_stop_qps(dev); 2771 if (ret) { 2772 mutex_unlock(&port->port_lock); 2773 goto out; 2774 } 2775 port_napi_disable(port); 2776 mutex_unlock(&port->port_lock); 2777 } 2778 reset_sq_restart_flag(port); 2779 } 2780 2781 /* Unregister old memory region */ 2782 ret = ehea_rem_mr(&adapter->mr); 2783 if (ret) { 2784 pr_err("unregister MR failed - driver inoperable!\n"); 2785 goto out; 2786 } 2787 } 2788 2789 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2790 2791 list_for_each_entry(adapter, &adapter_list, list) 2792 if (adapter->active_ports) { 2793 /* Register new memory region */ 2794 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2795 if (ret) { 2796 pr_err("register MR failed - driver inoperable!\n"); 2797 goto out; 2798 } 2799 2800 /* Restart all ports */ 2801 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2802 struct ehea_port *port = adapter->port[i]; 2803 2804 if (port) { 2805 struct net_device *dev = port->netdev; 2806 2807 if (dev->flags & IFF_UP) { 2808 mutex_lock(&port->port_lock); 2809 ret = ehea_restart_qps(dev); 2810 if (!ret) { 2811 check_sqs(port); 2812 port_napi_enable(port); 2813 netif_tx_wake_all_queues(dev); 2814 } else { 2815 netdev_err(dev, "Unable to restart QPS\n"); 2816 } 2817 mutex_unlock(&port->port_lock); 2818 } 2819 } 2820 } 2821 } 2822 pr_info("re-initializing driver complete\n"); 2823 out: 2824 return; 2825 } 2826 2827 static void ehea_tx_watchdog(struct net_device *dev) 2828 { 2829 struct ehea_port *port = netdev_priv(dev); 2830 2831 if (netif_carrier_ok(dev) && 2832 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2833 ehea_schedule_port_reset(port); 2834 } 2835 2836 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2837 { 2838 struct hcp_query_ehea *cb; 2839 u64 hret; 2840 int ret; 2841 2842 cb = (void *)get_zeroed_page(GFP_KERNEL); 2843 if (!cb) { 2844 ret = -ENOMEM; 2845 goto out; 2846 } 2847 2848 hret = ehea_h_query_ehea(adapter->handle, cb); 2849 2850 if (hret != H_SUCCESS) { 2851 ret = -EIO; 2852 goto out_herr; 2853 } 2854 2855 adapter->max_mc_mac = cb->max_mc_mac - 1; 2856 ret = 0; 2857 2858 out_herr: 2859 free_page((unsigned long)cb); 2860 out: 2861 return ret; 2862 } 2863 2864 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2865 { 2866 struct hcp_ehea_port_cb4 *cb4; 2867 u64 hret; 2868 int ret = 0; 2869 2870 *jumbo = 0; 2871 2872 /* (Try to) enable *jumbo frames */ 2873 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2874 if (!cb4) { 2875 pr_err("no mem for cb4\n"); 2876 ret = -ENOMEM; 2877 goto out; 2878 } else { 2879 hret = ehea_h_query_ehea_port(port->adapter->handle, 2880 port->logical_port_id, 2881 H_PORT_CB4, 2882 H_PORT_CB4_JUMBO, cb4); 2883 if (hret == H_SUCCESS) { 2884 if (cb4->jumbo_frame) 2885 *jumbo = 1; 2886 else { 2887 cb4->jumbo_frame = 1; 2888 hret = ehea_h_modify_ehea_port(port->adapter-> 2889 handle, 2890 port-> 2891 logical_port_id, 2892 H_PORT_CB4, 2893 H_PORT_CB4_JUMBO, 2894 cb4); 2895 if (hret == H_SUCCESS) 2896 *jumbo = 1; 2897 } 2898 } else 2899 ret = -EINVAL; 2900 2901 free_page((unsigned long)cb4); 2902 } 2903 out: 2904 return ret; 2905 } 2906 2907 static ssize_t ehea_show_port_id(struct device *dev, 2908 struct device_attribute *attr, char *buf) 2909 { 2910 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2911 return sprintf(buf, "%d", port->logical_port_id); 2912 } 2913 2914 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id, 2915 NULL); 2916 2917 static void logical_port_release(struct device *dev) 2918 { 2919 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2920 of_node_put(port->ofdev.dev.of_node); 2921 } 2922 2923 static struct device *ehea_register_port(struct ehea_port *port, 2924 struct device_node *dn) 2925 { 2926 int ret; 2927 2928 port->ofdev.dev.of_node = of_node_get(dn); 2929 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2930 port->ofdev.dev.bus = &ibmebus_bus_type; 2931 2932 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2933 port->ofdev.dev.release = logical_port_release; 2934 2935 ret = of_device_register(&port->ofdev); 2936 if (ret) { 2937 pr_err("failed to register device. ret=%d\n", ret); 2938 goto out; 2939 } 2940 2941 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2942 if (ret) { 2943 pr_err("failed to register attributes, ret=%d\n", ret); 2944 goto out_unreg_of_dev; 2945 } 2946 2947 return &port->ofdev.dev; 2948 2949 out_unreg_of_dev: 2950 of_device_unregister(&port->ofdev); 2951 out: 2952 return NULL; 2953 } 2954 2955 static void ehea_unregister_port(struct ehea_port *port) 2956 { 2957 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2958 of_device_unregister(&port->ofdev); 2959 } 2960 2961 static const struct net_device_ops ehea_netdev_ops = { 2962 .ndo_open = ehea_open, 2963 .ndo_stop = ehea_stop, 2964 .ndo_start_xmit = ehea_start_xmit, 2965 #ifdef CONFIG_NET_POLL_CONTROLLER 2966 .ndo_poll_controller = ehea_netpoll, 2967 #endif 2968 .ndo_get_stats64 = ehea_get_stats64, 2969 .ndo_set_mac_address = ehea_set_mac_addr, 2970 .ndo_validate_addr = eth_validate_addr, 2971 .ndo_set_rx_mode = ehea_set_multicast_list, 2972 .ndo_change_mtu = ehea_change_mtu, 2973 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2974 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2975 .ndo_tx_timeout = ehea_tx_watchdog, 2976 }; 2977 2978 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2979 u32 logical_port_id, 2980 struct device_node *dn) 2981 { 2982 int ret; 2983 struct net_device *dev; 2984 struct ehea_port *port; 2985 struct device *port_dev; 2986 int jumbo; 2987 2988 /* allocate memory for the port structures */ 2989 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2990 2991 if (!dev) { 2992 ret = -ENOMEM; 2993 goto out_err; 2994 } 2995 2996 port = netdev_priv(dev); 2997 2998 mutex_init(&port->port_lock); 2999 port->state = EHEA_PORT_DOWN; 3000 port->sig_comp_iv = sq_entries / 10; 3001 3002 port->adapter = adapter; 3003 port->netdev = dev; 3004 port->logical_port_id = logical_port_id; 3005 3006 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 3007 3008 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 3009 if (!port->mc_list) { 3010 ret = -ENOMEM; 3011 goto out_free_ethdev; 3012 } 3013 3014 INIT_LIST_HEAD(&port->mc_list->list); 3015 3016 ret = ehea_sense_port_attr(port); 3017 if (ret) 3018 goto out_free_mc_list; 3019 3020 netif_set_real_num_rx_queues(dev, port->num_def_qps); 3021 netif_set_real_num_tx_queues(dev, port->num_def_qps); 3022 3023 port_dev = ehea_register_port(port, dn); 3024 if (!port_dev) 3025 goto out_free_mc_list; 3026 3027 SET_NETDEV_DEV(dev, port_dev); 3028 3029 /* initialize net_device structure */ 3030 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); 3031 3032 dev->netdev_ops = &ehea_netdev_ops; 3033 ehea_set_ethtool_ops(dev); 3034 3035 dev->hw_features = NETIF_F_SG | NETIF_F_TSO | 3036 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX; 3037 dev->features = NETIF_F_SG | NETIF_F_TSO | 3038 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | 3039 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 3040 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM; 3041 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3042 NETIF_F_IP_CSUM; 3043 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3044 3045 INIT_WORK(&port->reset_task, ehea_reset_port); 3046 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3047 3048 init_waitqueue_head(&port->swqe_avail_wq); 3049 init_waitqueue_head(&port->restart_wq); 3050 3051 memset(&port->stats, 0, sizeof(struct net_device_stats)); 3052 ret = register_netdev(dev); 3053 if (ret) { 3054 pr_err("register_netdev failed. ret=%d\n", ret); 3055 goto out_unreg_port; 3056 } 3057 3058 ret = ehea_get_jumboframe_status(port, &jumbo); 3059 if (ret) 3060 netdev_err(dev, "failed determining jumbo frame status\n"); 3061 3062 netdev_info(dev, "Jumbo frames are %sabled\n", 3063 jumbo == 1 ? "en" : "dis"); 3064 3065 adapter->active_ports++; 3066 3067 return port; 3068 3069 out_unreg_port: 3070 ehea_unregister_port(port); 3071 3072 out_free_mc_list: 3073 kfree(port->mc_list); 3074 3075 out_free_ethdev: 3076 free_netdev(dev); 3077 3078 out_err: 3079 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3080 logical_port_id, ret); 3081 return NULL; 3082 } 3083 3084 static void ehea_shutdown_single_port(struct ehea_port *port) 3085 { 3086 struct ehea_adapter *adapter = port->adapter; 3087 3088 cancel_work_sync(&port->reset_task); 3089 cancel_delayed_work_sync(&port->stats_work); 3090 unregister_netdev(port->netdev); 3091 ehea_unregister_port(port); 3092 kfree(port->mc_list); 3093 free_netdev(port->netdev); 3094 adapter->active_ports--; 3095 } 3096 3097 static int ehea_setup_ports(struct ehea_adapter *adapter) 3098 { 3099 struct device_node *lhea_dn; 3100 struct device_node *eth_dn = NULL; 3101 3102 const u32 *dn_log_port_id; 3103 int i = 0; 3104 3105 lhea_dn = adapter->ofdev->dev.of_node; 3106 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3107 3108 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3109 NULL); 3110 if (!dn_log_port_id) { 3111 pr_err("bad device node: eth_dn name=%s\n", 3112 eth_dn->full_name); 3113 continue; 3114 } 3115 3116 if (ehea_add_adapter_mr(adapter)) { 3117 pr_err("creating MR failed\n"); 3118 of_node_put(eth_dn); 3119 return -EIO; 3120 } 3121 3122 adapter->port[i] = ehea_setup_single_port(adapter, 3123 *dn_log_port_id, 3124 eth_dn); 3125 if (adapter->port[i]) 3126 netdev_info(adapter->port[i]->netdev, 3127 "logical port id #%d\n", *dn_log_port_id); 3128 else 3129 ehea_remove_adapter_mr(adapter); 3130 3131 i++; 3132 } 3133 return 0; 3134 } 3135 3136 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3137 u32 logical_port_id) 3138 { 3139 struct device_node *lhea_dn; 3140 struct device_node *eth_dn = NULL; 3141 const u32 *dn_log_port_id; 3142 3143 lhea_dn = adapter->ofdev->dev.of_node; 3144 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3145 3146 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3147 NULL); 3148 if (dn_log_port_id) 3149 if (*dn_log_port_id == logical_port_id) 3150 return eth_dn; 3151 } 3152 3153 return NULL; 3154 } 3155 3156 static ssize_t ehea_probe_port(struct device *dev, 3157 struct device_attribute *attr, 3158 const char *buf, size_t count) 3159 { 3160 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3161 struct ehea_port *port; 3162 struct device_node *eth_dn = NULL; 3163 int i; 3164 3165 u32 logical_port_id; 3166 3167 sscanf(buf, "%d", &logical_port_id); 3168 3169 port = ehea_get_port(adapter, logical_port_id); 3170 3171 if (port) { 3172 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3173 logical_port_id); 3174 return -EINVAL; 3175 } 3176 3177 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3178 3179 if (!eth_dn) { 3180 pr_info("no logical port with id %d found\n", logical_port_id); 3181 return -EINVAL; 3182 } 3183 3184 if (ehea_add_adapter_mr(adapter)) { 3185 pr_err("creating MR failed\n"); 3186 return -EIO; 3187 } 3188 3189 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3190 3191 of_node_put(eth_dn); 3192 3193 if (port) { 3194 for (i = 0; i < EHEA_MAX_PORTS; i++) 3195 if (!adapter->port[i]) { 3196 adapter->port[i] = port; 3197 break; 3198 } 3199 3200 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3201 logical_port_id); 3202 } else { 3203 ehea_remove_adapter_mr(adapter); 3204 return -EIO; 3205 } 3206 3207 return (ssize_t) count; 3208 } 3209 3210 static ssize_t ehea_remove_port(struct device *dev, 3211 struct device_attribute *attr, 3212 const char *buf, size_t count) 3213 { 3214 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3215 struct ehea_port *port; 3216 int i; 3217 u32 logical_port_id; 3218 3219 sscanf(buf, "%d", &logical_port_id); 3220 3221 port = ehea_get_port(adapter, logical_port_id); 3222 3223 if (port) { 3224 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3225 logical_port_id); 3226 3227 ehea_shutdown_single_port(port); 3228 3229 for (i = 0; i < EHEA_MAX_PORTS; i++) 3230 if (adapter->port[i] == port) { 3231 adapter->port[i] = NULL; 3232 break; 3233 } 3234 } else { 3235 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3236 logical_port_id); 3237 return -EINVAL; 3238 } 3239 3240 ehea_remove_adapter_mr(adapter); 3241 3242 return (ssize_t) count; 3243 } 3244 3245 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port); 3246 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port); 3247 3248 static int ehea_create_device_sysfs(struct platform_device *dev) 3249 { 3250 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3251 if (ret) 3252 goto out; 3253 3254 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3255 out: 3256 return ret; 3257 } 3258 3259 static void ehea_remove_device_sysfs(struct platform_device *dev) 3260 { 3261 device_remove_file(&dev->dev, &dev_attr_probe_port); 3262 device_remove_file(&dev->dev, &dev_attr_remove_port); 3263 } 3264 3265 static int ehea_reboot_notifier(struct notifier_block *nb, 3266 unsigned long action, void *unused) 3267 { 3268 if (action == SYS_RESTART) { 3269 pr_info("Reboot: freeing all eHEA resources\n"); 3270 ibmebus_unregister_driver(&ehea_driver); 3271 } 3272 return NOTIFY_DONE; 3273 } 3274 3275 static struct notifier_block ehea_reboot_nb = { 3276 .notifier_call = ehea_reboot_notifier, 3277 }; 3278 3279 static int ehea_mem_notifier(struct notifier_block *nb, 3280 unsigned long action, void *data) 3281 { 3282 int ret = NOTIFY_BAD; 3283 struct memory_notify *arg = data; 3284 3285 mutex_lock(&dlpar_mem_lock); 3286 3287 switch (action) { 3288 case MEM_CANCEL_OFFLINE: 3289 pr_info("memory offlining canceled"); 3290 /* Fall through: re-add canceled memory block */ 3291 3292 case MEM_ONLINE: 3293 pr_info("memory is going online"); 3294 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3295 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3296 goto out_unlock; 3297 ehea_rereg_mrs(); 3298 break; 3299 3300 case MEM_GOING_OFFLINE: 3301 pr_info("memory is going offline"); 3302 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3303 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3304 goto out_unlock; 3305 ehea_rereg_mrs(); 3306 break; 3307 3308 default: 3309 break; 3310 } 3311 3312 ehea_update_firmware_handles(); 3313 ret = NOTIFY_OK; 3314 3315 out_unlock: 3316 mutex_unlock(&dlpar_mem_lock); 3317 return ret; 3318 } 3319 3320 static struct notifier_block ehea_mem_nb = { 3321 .notifier_call = ehea_mem_notifier, 3322 }; 3323 3324 static void ehea_crash_handler(void) 3325 { 3326 int i; 3327 3328 if (ehea_fw_handles.arr) 3329 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3330 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3331 ehea_fw_handles.arr[i].fwh, 3332 FORCE_FREE); 3333 3334 if (ehea_bcmc_regs.arr) 3335 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3336 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3337 ehea_bcmc_regs.arr[i].port_id, 3338 ehea_bcmc_regs.arr[i].reg_type, 3339 ehea_bcmc_regs.arr[i].macaddr, 3340 0, H_DEREG_BCMC); 3341 } 3342 3343 static atomic_t ehea_memory_hooks_registered; 3344 3345 /* Register memory hooks on probe of first adapter */ 3346 static int ehea_register_memory_hooks(void) 3347 { 3348 int ret = 0; 3349 3350 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1) 3351 return 0; 3352 3353 ret = ehea_create_busmap(); 3354 if (ret) { 3355 pr_info("ehea_create_busmap failed\n"); 3356 goto out; 3357 } 3358 3359 ret = register_reboot_notifier(&ehea_reboot_nb); 3360 if (ret) { 3361 pr_info("register_reboot_notifier failed\n"); 3362 goto out; 3363 } 3364 3365 ret = register_memory_notifier(&ehea_mem_nb); 3366 if (ret) { 3367 pr_info("register_memory_notifier failed\n"); 3368 goto out2; 3369 } 3370 3371 ret = crash_shutdown_register(ehea_crash_handler); 3372 if (ret) { 3373 pr_info("crash_shutdown_register failed\n"); 3374 goto out3; 3375 } 3376 3377 return 0; 3378 3379 out3: 3380 unregister_memory_notifier(&ehea_mem_nb); 3381 out2: 3382 unregister_reboot_notifier(&ehea_reboot_nb); 3383 out: 3384 atomic_dec(&ehea_memory_hooks_registered); 3385 return ret; 3386 } 3387 3388 static void ehea_unregister_memory_hooks(void) 3389 { 3390 /* Only remove the hooks if we've registered them */ 3391 if (atomic_read(&ehea_memory_hooks_registered) == 0) 3392 return; 3393 3394 unregister_reboot_notifier(&ehea_reboot_nb); 3395 if (crash_shutdown_unregister(ehea_crash_handler)) 3396 pr_info("failed unregistering crash handler\n"); 3397 unregister_memory_notifier(&ehea_mem_nb); 3398 } 3399 3400 static int ehea_probe_adapter(struct platform_device *dev) 3401 { 3402 struct ehea_adapter *adapter; 3403 const u64 *adapter_handle; 3404 int ret; 3405 int i; 3406 3407 ret = ehea_register_memory_hooks(); 3408 if (ret) 3409 return ret; 3410 3411 if (!dev || !dev->dev.of_node) { 3412 pr_err("Invalid ibmebus device probed\n"); 3413 return -EINVAL; 3414 } 3415 3416 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL); 3417 if (!adapter) { 3418 ret = -ENOMEM; 3419 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3420 goto out; 3421 } 3422 3423 list_add(&adapter->list, &adapter_list); 3424 3425 adapter->ofdev = dev; 3426 3427 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3428 NULL); 3429 if (adapter_handle) 3430 adapter->handle = *adapter_handle; 3431 3432 if (!adapter->handle) { 3433 dev_err(&dev->dev, "failed getting handle for adapter" 3434 " '%s'\n", dev->dev.of_node->full_name); 3435 ret = -ENODEV; 3436 goto out_free_ad; 3437 } 3438 3439 adapter->pd = EHEA_PD_ID; 3440 3441 platform_set_drvdata(dev, adapter); 3442 3443 3444 /* initialize adapter and ports */ 3445 /* get adapter properties */ 3446 ret = ehea_sense_adapter_attr(adapter); 3447 if (ret) { 3448 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3449 goto out_free_ad; 3450 } 3451 3452 adapter->neq = ehea_create_eq(adapter, 3453 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3454 if (!adapter->neq) { 3455 ret = -EIO; 3456 dev_err(&dev->dev, "NEQ creation failed\n"); 3457 goto out_free_ad; 3458 } 3459 3460 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, 3461 (unsigned long)adapter); 3462 3463 ret = ehea_create_device_sysfs(dev); 3464 if (ret) 3465 goto out_kill_eq; 3466 3467 ret = ehea_setup_ports(adapter); 3468 if (ret) { 3469 dev_err(&dev->dev, "setup_ports failed\n"); 3470 goto out_rem_dev_sysfs; 3471 } 3472 3473 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3474 ehea_interrupt_neq, 0, 3475 "ehea_neq", adapter); 3476 if (ret) { 3477 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3478 goto out_shutdown_ports; 3479 } 3480 3481 /* Handle any events that might be pending. */ 3482 tasklet_hi_schedule(&adapter->neq_tasklet); 3483 3484 ret = 0; 3485 goto out; 3486 3487 out_shutdown_ports: 3488 for (i = 0; i < EHEA_MAX_PORTS; i++) 3489 if (adapter->port[i]) { 3490 ehea_shutdown_single_port(adapter->port[i]); 3491 adapter->port[i] = NULL; 3492 } 3493 3494 out_rem_dev_sysfs: 3495 ehea_remove_device_sysfs(dev); 3496 3497 out_kill_eq: 3498 ehea_destroy_eq(adapter->neq); 3499 3500 out_free_ad: 3501 list_del(&adapter->list); 3502 3503 out: 3504 ehea_update_firmware_handles(); 3505 3506 return ret; 3507 } 3508 3509 static int ehea_remove(struct platform_device *dev) 3510 { 3511 struct ehea_adapter *adapter = platform_get_drvdata(dev); 3512 int i; 3513 3514 for (i = 0; i < EHEA_MAX_PORTS; i++) 3515 if (adapter->port[i]) { 3516 ehea_shutdown_single_port(adapter->port[i]); 3517 adapter->port[i] = NULL; 3518 } 3519 3520 ehea_remove_device_sysfs(dev); 3521 3522 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3523 tasklet_kill(&adapter->neq_tasklet); 3524 3525 ehea_destroy_eq(adapter->neq); 3526 ehea_remove_adapter_mr(adapter); 3527 list_del(&adapter->list); 3528 3529 ehea_update_firmware_handles(); 3530 3531 return 0; 3532 } 3533 3534 static int check_module_parm(void) 3535 { 3536 int ret = 0; 3537 3538 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3539 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3540 pr_info("Bad parameter: rq1_entries\n"); 3541 ret = -EINVAL; 3542 } 3543 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3544 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3545 pr_info("Bad parameter: rq2_entries\n"); 3546 ret = -EINVAL; 3547 } 3548 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3549 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3550 pr_info("Bad parameter: rq3_entries\n"); 3551 ret = -EINVAL; 3552 } 3553 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3554 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3555 pr_info("Bad parameter: sq_entries\n"); 3556 ret = -EINVAL; 3557 } 3558 3559 return ret; 3560 } 3561 3562 static ssize_t ehea_show_capabilities(struct device_driver *drv, 3563 char *buf) 3564 { 3565 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3566 } 3567 3568 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH, 3569 ehea_show_capabilities, NULL); 3570 3571 static int __init ehea_module_init(void) 3572 { 3573 int ret; 3574 3575 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3576 3577 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3578 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3579 3580 mutex_init(&ehea_fw_handles.lock); 3581 spin_lock_init(&ehea_bcmc_regs.lock); 3582 3583 ret = check_module_parm(); 3584 if (ret) 3585 goto out; 3586 3587 ret = ibmebus_register_driver(&ehea_driver); 3588 if (ret) { 3589 pr_err("failed registering eHEA device driver on ebus\n"); 3590 goto out; 3591 } 3592 3593 ret = driver_create_file(&ehea_driver.driver, 3594 &driver_attr_capabilities); 3595 if (ret) { 3596 pr_err("failed to register capabilities attribute, ret=%d\n", 3597 ret); 3598 goto out2; 3599 } 3600 3601 return ret; 3602 3603 out2: 3604 ibmebus_unregister_driver(&ehea_driver); 3605 out: 3606 return ret; 3607 } 3608 3609 static void __exit ehea_module_exit(void) 3610 { 3611 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3612 ibmebus_unregister_driver(&ehea_driver); 3613 ehea_unregister_memory_hooks(); 3614 kfree(ehea_fw_handles.arr); 3615 kfree(ehea_bcmc_regs.arr); 3616 ehea_destroy_busmap(); 3617 } 3618 3619 module_init(ehea_module_init); 3620 module_exit(ehea_module_exit); 3621