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 if (!port) { 1173 netdev_err(NULL, "unknown portnum %x\n", portnum); 1174 return; 1175 } 1176 dev = port->netdev; 1177 1178 switch (ec) { 1179 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1180 1181 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1182 if (!netif_carrier_ok(dev)) { 1183 ret = ehea_sense_port_attr(port); 1184 if (ret) { 1185 netdev_err(dev, "failed resensing port attributes\n"); 1186 break; 1187 } 1188 1189 netif_info(port, link, dev, 1190 "Logical port up: %dMbps %s Duplex\n", 1191 port->port_speed, 1192 port->full_duplex == 1 ? 1193 "Full" : "Half"); 1194 1195 netif_carrier_on(dev); 1196 netif_wake_queue(dev); 1197 } 1198 } else 1199 if (netif_carrier_ok(dev)) { 1200 netif_info(port, link, dev, 1201 "Logical port down\n"); 1202 netif_carrier_off(dev); 1203 netif_tx_disable(dev); 1204 } 1205 1206 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1207 port->phy_link = EHEA_PHY_LINK_UP; 1208 netif_info(port, link, dev, 1209 "Physical port up\n"); 1210 if (prop_carrier_state) 1211 netif_carrier_on(dev); 1212 } else { 1213 port->phy_link = EHEA_PHY_LINK_DOWN; 1214 netif_info(port, link, dev, 1215 "Physical port down\n"); 1216 if (prop_carrier_state) 1217 netif_carrier_off(dev); 1218 } 1219 1220 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1221 netdev_info(dev, 1222 "External switch port is primary port\n"); 1223 else 1224 netdev_info(dev, 1225 "External switch port is backup port\n"); 1226 1227 break; 1228 case EHEA_EC_ADAPTER_MALFUNC: 1229 netdev_err(dev, "Adapter malfunction\n"); 1230 break; 1231 case EHEA_EC_PORT_MALFUNC: 1232 netdev_info(dev, "Port malfunction\n"); 1233 netif_carrier_off(dev); 1234 netif_tx_disable(dev); 1235 break; 1236 default: 1237 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1238 break; 1239 } 1240 } 1241 1242 static void ehea_neq_tasklet(unsigned long data) 1243 { 1244 struct ehea_adapter *adapter = (struct ehea_adapter *)data; 1245 struct ehea_eqe *eqe; 1246 u64 event_mask; 1247 1248 eqe = ehea_poll_eq(adapter->neq); 1249 pr_debug("eqe=%p\n", eqe); 1250 1251 while (eqe) { 1252 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1253 ehea_parse_eqe(adapter, eqe->entry); 1254 eqe = ehea_poll_eq(adapter->neq); 1255 pr_debug("next eqe=%p\n", eqe); 1256 } 1257 1258 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1259 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1260 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1261 1262 ehea_h_reset_events(adapter->handle, 1263 adapter->neq->fw_handle, event_mask); 1264 } 1265 1266 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1267 { 1268 struct ehea_adapter *adapter = param; 1269 tasklet_hi_schedule(&adapter->neq_tasklet); 1270 return IRQ_HANDLED; 1271 } 1272 1273 1274 static int ehea_fill_port_res(struct ehea_port_res *pr) 1275 { 1276 int ret; 1277 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1278 1279 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1280 1281 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1282 1283 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1284 1285 return ret; 1286 } 1287 1288 static int ehea_reg_interrupts(struct net_device *dev) 1289 { 1290 struct ehea_port *port = netdev_priv(dev); 1291 struct ehea_port_res *pr; 1292 int i, ret; 1293 1294 1295 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1296 dev->name); 1297 1298 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1299 ehea_qp_aff_irq_handler, 1300 0, port->int_aff_name, port); 1301 if (ret) { 1302 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1303 port->qp_eq->attr.ist1); 1304 goto out_free_qpeq; 1305 } 1306 1307 netif_info(port, ifup, dev, 1308 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1309 port->qp_eq->attr.ist1); 1310 1311 1312 for (i = 0; i < port->num_def_qps; i++) { 1313 pr = &port->port_res[i]; 1314 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1315 "%s-queue%d", dev->name, i); 1316 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1317 ehea_recv_irq_handler, 1318 0, pr->int_send_name, pr); 1319 if (ret) { 1320 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1321 i, pr->eq->attr.ist1); 1322 goto out_free_req; 1323 } 1324 netif_info(port, ifup, dev, 1325 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1326 pr->eq->attr.ist1, i); 1327 } 1328 out: 1329 return ret; 1330 1331 1332 out_free_req: 1333 while (--i >= 0) { 1334 u32 ist = port->port_res[i].eq->attr.ist1; 1335 ibmebus_free_irq(ist, &port->port_res[i]); 1336 } 1337 1338 out_free_qpeq: 1339 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1340 i = port->num_def_qps; 1341 1342 goto out; 1343 1344 } 1345 1346 static void ehea_free_interrupts(struct net_device *dev) 1347 { 1348 struct ehea_port *port = netdev_priv(dev); 1349 struct ehea_port_res *pr; 1350 int i; 1351 1352 /* send */ 1353 1354 for (i = 0; i < port->num_def_qps; i++) { 1355 pr = &port->port_res[i]; 1356 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1357 netif_info(port, intr, dev, 1358 "free send irq for res %d with handle 0x%X\n", 1359 i, pr->eq->attr.ist1); 1360 } 1361 1362 /* associated events */ 1363 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1364 netif_info(port, intr, dev, 1365 "associated event interrupt for handle 0x%X freed\n", 1366 port->qp_eq->attr.ist1); 1367 } 1368 1369 static int ehea_configure_port(struct ehea_port *port) 1370 { 1371 int ret, i; 1372 u64 hret, mask; 1373 struct hcp_ehea_port_cb0 *cb0; 1374 1375 ret = -ENOMEM; 1376 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1377 if (!cb0) 1378 goto out; 1379 1380 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1381 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1382 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1383 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1384 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1385 PXLY_RC_VLAN_FILTER) 1386 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1387 1388 for (i = 0; i < port->num_mcs; i++) 1389 if (use_mcs) 1390 cb0->default_qpn_arr[i] = 1391 port->port_res[i].qp->init_attr.qp_nr; 1392 else 1393 cb0->default_qpn_arr[i] = 1394 port->port_res[0].qp->init_attr.qp_nr; 1395 1396 if (netif_msg_ifup(port)) 1397 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1398 1399 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1400 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1401 1402 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1403 port->logical_port_id, 1404 H_PORT_CB0, mask, cb0); 1405 ret = -EIO; 1406 if (hret != H_SUCCESS) 1407 goto out_free; 1408 1409 ret = 0; 1410 1411 out_free: 1412 free_page((unsigned long)cb0); 1413 out: 1414 return ret; 1415 } 1416 1417 static int ehea_gen_smrs(struct ehea_port_res *pr) 1418 { 1419 int ret; 1420 struct ehea_adapter *adapter = pr->port->adapter; 1421 1422 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1423 if (ret) 1424 goto out; 1425 1426 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1427 if (ret) 1428 goto out_free; 1429 1430 return 0; 1431 1432 out_free: 1433 ehea_rem_mr(&pr->send_mr); 1434 out: 1435 pr_err("Generating SMRS failed\n"); 1436 return -EIO; 1437 } 1438 1439 static int ehea_rem_smrs(struct ehea_port_res *pr) 1440 { 1441 if ((ehea_rem_mr(&pr->send_mr)) || 1442 (ehea_rem_mr(&pr->recv_mr))) 1443 return -EIO; 1444 else 1445 return 0; 1446 } 1447 1448 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1449 { 1450 int arr_size = sizeof(void *) * max_q_entries; 1451 1452 q_skba->arr = vzalloc(arr_size); 1453 if (!q_skba->arr) 1454 return -ENOMEM; 1455 1456 q_skba->len = max_q_entries; 1457 q_skba->index = 0; 1458 q_skba->os_skbs = 0; 1459 1460 return 0; 1461 } 1462 1463 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1464 struct port_res_cfg *pr_cfg, int queue_token) 1465 { 1466 struct ehea_adapter *adapter = port->adapter; 1467 enum ehea_eq_type eq_type = EHEA_EQ; 1468 struct ehea_qp_init_attr *init_attr = NULL; 1469 int ret = -EIO; 1470 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1471 1472 tx_bytes = pr->tx_bytes; 1473 tx_packets = pr->tx_packets; 1474 rx_bytes = pr->rx_bytes; 1475 rx_packets = pr->rx_packets; 1476 1477 memset(pr, 0, sizeof(struct ehea_port_res)); 1478 1479 pr->tx_bytes = rx_bytes; 1480 pr->tx_packets = tx_packets; 1481 pr->rx_bytes = rx_bytes; 1482 pr->rx_packets = rx_packets; 1483 1484 pr->port = port; 1485 1486 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1487 if (!pr->eq) { 1488 pr_err("create_eq failed (eq)\n"); 1489 goto out_free; 1490 } 1491 1492 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1493 pr->eq->fw_handle, 1494 port->logical_port_id); 1495 if (!pr->recv_cq) { 1496 pr_err("create_cq failed (cq_recv)\n"); 1497 goto out_free; 1498 } 1499 1500 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1501 pr->eq->fw_handle, 1502 port->logical_port_id); 1503 if (!pr->send_cq) { 1504 pr_err("create_cq failed (cq_send)\n"); 1505 goto out_free; 1506 } 1507 1508 if (netif_msg_ifup(port)) 1509 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1510 pr->send_cq->attr.act_nr_of_cqes, 1511 pr->recv_cq->attr.act_nr_of_cqes); 1512 1513 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1514 if (!init_attr) { 1515 ret = -ENOMEM; 1516 pr_err("no mem for ehea_qp_init_attr\n"); 1517 goto out_free; 1518 } 1519 1520 init_attr->low_lat_rq1 = 1; 1521 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1522 init_attr->rq_count = 3; 1523 init_attr->qp_token = queue_token; 1524 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1525 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1526 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1527 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1528 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1529 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1530 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1531 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1532 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1533 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1534 init_attr->port_nr = port->logical_port_id; 1535 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1536 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1537 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1538 1539 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1540 if (!pr->qp) { 1541 pr_err("create_qp failed\n"); 1542 ret = -EIO; 1543 goto out_free; 1544 } 1545 1546 if (netif_msg_ifup(port)) 1547 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", 1548 init_attr->qp_nr, 1549 init_attr->act_nr_send_wqes, 1550 init_attr->act_nr_rwqes_rq1, 1551 init_attr->act_nr_rwqes_rq2, 1552 init_attr->act_nr_rwqes_rq3); 1553 1554 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1555 1556 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1557 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1558 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1559 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1560 if (ret) 1561 goto out_free; 1562 1563 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1564 if (ehea_gen_smrs(pr) != 0) { 1565 ret = -EIO; 1566 goto out_free; 1567 } 1568 1569 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1570 1571 kfree(init_attr); 1572 1573 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); 1574 1575 ret = 0; 1576 goto out; 1577 1578 out_free: 1579 kfree(init_attr); 1580 vfree(pr->sq_skba.arr); 1581 vfree(pr->rq1_skba.arr); 1582 vfree(pr->rq2_skba.arr); 1583 vfree(pr->rq3_skba.arr); 1584 ehea_destroy_qp(pr->qp); 1585 ehea_destroy_cq(pr->send_cq); 1586 ehea_destroy_cq(pr->recv_cq); 1587 ehea_destroy_eq(pr->eq); 1588 out: 1589 return ret; 1590 } 1591 1592 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1593 { 1594 int ret, i; 1595 1596 if (pr->qp) 1597 netif_napi_del(&pr->napi); 1598 1599 ret = ehea_destroy_qp(pr->qp); 1600 1601 if (!ret) { 1602 ehea_destroy_cq(pr->send_cq); 1603 ehea_destroy_cq(pr->recv_cq); 1604 ehea_destroy_eq(pr->eq); 1605 1606 for (i = 0; i < pr->rq1_skba.len; i++) 1607 if (pr->rq1_skba.arr[i]) 1608 dev_kfree_skb(pr->rq1_skba.arr[i]); 1609 1610 for (i = 0; i < pr->rq2_skba.len; i++) 1611 if (pr->rq2_skba.arr[i]) 1612 dev_kfree_skb(pr->rq2_skba.arr[i]); 1613 1614 for (i = 0; i < pr->rq3_skba.len; i++) 1615 if (pr->rq3_skba.arr[i]) 1616 dev_kfree_skb(pr->rq3_skba.arr[i]); 1617 1618 for (i = 0; i < pr->sq_skba.len; i++) 1619 if (pr->sq_skba.arr[i]) 1620 dev_kfree_skb(pr->sq_skba.arr[i]); 1621 1622 vfree(pr->rq1_skba.arr); 1623 vfree(pr->rq2_skba.arr); 1624 vfree(pr->rq3_skba.arr); 1625 vfree(pr->sq_skba.arr); 1626 ret = ehea_rem_smrs(pr); 1627 } 1628 return ret; 1629 } 1630 1631 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1632 u32 lkey) 1633 { 1634 int skb_data_size = skb_headlen(skb); 1635 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1636 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1637 unsigned int immediate_len = SWQE2_MAX_IMM; 1638 1639 swqe->descriptors = 0; 1640 1641 if (skb_is_gso(skb)) { 1642 swqe->tx_control |= EHEA_SWQE_TSO; 1643 swqe->mss = skb_shinfo(skb)->gso_size; 1644 /* 1645 * For TSO packets we only copy the headers into the 1646 * immediate area. 1647 */ 1648 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb); 1649 } 1650 1651 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1652 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1653 swqe->immediate_data_length = immediate_len; 1654 1655 if (skb_data_size > immediate_len) { 1656 sg1entry->l_key = lkey; 1657 sg1entry->len = skb_data_size - immediate_len; 1658 sg1entry->vaddr = 1659 ehea_map_vaddr(skb->data + immediate_len); 1660 swqe->descriptors++; 1661 } 1662 } else { 1663 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1664 swqe->immediate_data_length = skb_data_size; 1665 } 1666 } 1667 1668 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1669 struct ehea_swqe *swqe, u32 lkey) 1670 { 1671 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1672 skb_frag_t *frag; 1673 int nfrags, sg1entry_contains_frag_data, i; 1674 1675 nfrags = skb_shinfo(skb)->nr_frags; 1676 sg1entry = &swqe->u.immdata_desc.sg_entry; 1677 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1678 sg1entry_contains_frag_data = 0; 1679 1680 write_swqe2_immediate(skb, swqe, lkey); 1681 1682 /* write descriptors */ 1683 if (nfrags > 0) { 1684 if (swqe->descriptors == 0) { 1685 /* sg1entry not yet used */ 1686 frag = &skb_shinfo(skb)->frags[0]; 1687 1688 /* copy sg1entry data */ 1689 sg1entry->l_key = lkey; 1690 sg1entry->len = skb_frag_size(frag); 1691 sg1entry->vaddr = 1692 ehea_map_vaddr(skb_frag_address(frag)); 1693 swqe->descriptors++; 1694 sg1entry_contains_frag_data = 1; 1695 } 1696 1697 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1698 1699 frag = &skb_shinfo(skb)->frags[i]; 1700 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1701 1702 sgentry->l_key = lkey; 1703 sgentry->len = skb_frag_size(frag); 1704 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1705 swqe->descriptors++; 1706 } 1707 } 1708 } 1709 1710 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1711 { 1712 int ret = 0; 1713 u64 hret; 1714 u8 reg_type; 1715 1716 /* De/Register untagged packets */ 1717 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1718 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1719 port->logical_port_id, 1720 reg_type, port->mac_addr, 0, hcallid); 1721 if (hret != H_SUCCESS) { 1722 pr_err("%sregistering bc address failed (tagged)\n", 1723 hcallid == H_REG_BCMC ? "" : "de"); 1724 ret = -EIO; 1725 goto out_herr; 1726 } 1727 1728 /* De/Register VLAN packets */ 1729 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1730 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1731 port->logical_port_id, 1732 reg_type, port->mac_addr, 0, hcallid); 1733 if (hret != H_SUCCESS) { 1734 pr_err("%sregistering bc address failed (vlan)\n", 1735 hcallid == H_REG_BCMC ? "" : "de"); 1736 ret = -EIO; 1737 } 1738 out_herr: 1739 return ret; 1740 } 1741 1742 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1743 { 1744 struct ehea_port *port = netdev_priv(dev); 1745 struct sockaddr *mac_addr = sa; 1746 struct hcp_ehea_port_cb0 *cb0; 1747 int ret; 1748 u64 hret; 1749 1750 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1751 ret = -EADDRNOTAVAIL; 1752 goto out; 1753 } 1754 1755 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1756 if (!cb0) { 1757 pr_err("no mem for cb0\n"); 1758 ret = -ENOMEM; 1759 goto out; 1760 } 1761 1762 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1763 1764 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1765 1766 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1767 port->logical_port_id, H_PORT_CB0, 1768 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1769 if (hret != H_SUCCESS) { 1770 ret = -EIO; 1771 goto out_free; 1772 } 1773 1774 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); 1775 1776 /* Deregister old MAC in pHYP */ 1777 if (port->state == EHEA_PORT_UP) { 1778 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1779 if (ret) 1780 goto out_upregs; 1781 } 1782 1783 port->mac_addr = cb0->port_mac_addr << 16; 1784 1785 /* Register new MAC in pHYP */ 1786 if (port->state == EHEA_PORT_UP) { 1787 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1788 if (ret) 1789 goto out_upregs; 1790 } 1791 1792 ret = 0; 1793 1794 out_upregs: 1795 ehea_update_bcmc_registrations(); 1796 out_free: 1797 free_page((unsigned long)cb0); 1798 out: 1799 return ret; 1800 } 1801 1802 static void ehea_promiscuous_error(u64 hret, int enable) 1803 { 1804 if (hret == H_AUTHORITY) 1805 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1806 enable == 1 ? "en" : "dis"); 1807 else 1808 pr_err("failed %sabling promiscuous mode\n", 1809 enable == 1 ? "en" : "dis"); 1810 } 1811 1812 static void ehea_promiscuous(struct net_device *dev, int enable) 1813 { 1814 struct ehea_port *port = netdev_priv(dev); 1815 struct hcp_ehea_port_cb7 *cb7; 1816 u64 hret; 1817 1818 if (enable == port->promisc) 1819 return; 1820 1821 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1822 if (!cb7) { 1823 pr_err("no mem for cb7\n"); 1824 goto out; 1825 } 1826 1827 /* Modify Pxs_DUCQPN in CB7 */ 1828 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1829 1830 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1831 port->logical_port_id, 1832 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1833 if (hret) { 1834 ehea_promiscuous_error(hret, enable); 1835 goto out; 1836 } 1837 1838 port->promisc = enable; 1839 out: 1840 free_page((unsigned long)cb7); 1841 } 1842 1843 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1844 u32 hcallid) 1845 { 1846 u64 hret; 1847 u8 reg_type; 1848 1849 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; 1850 if (mc_mac_addr == 0) 1851 reg_type |= EHEA_BCMC_SCOPE_ALL; 1852 1853 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1854 port->logical_port_id, 1855 reg_type, mc_mac_addr, 0, hcallid); 1856 if (hret) 1857 goto out; 1858 1859 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL; 1860 if (mc_mac_addr == 0) 1861 reg_type |= EHEA_BCMC_SCOPE_ALL; 1862 1863 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1864 port->logical_port_id, 1865 reg_type, mc_mac_addr, 0, hcallid); 1866 out: 1867 return hret; 1868 } 1869 1870 static int ehea_drop_multicast_list(struct net_device *dev) 1871 { 1872 struct ehea_port *port = netdev_priv(dev); 1873 struct ehea_mc_list *mc_entry = port->mc_list; 1874 struct list_head *pos; 1875 struct list_head *temp; 1876 int ret = 0; 1877 u64 hret; 1878 1879 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1880 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1881 1882 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1883 H_DEREG_BCMC); 1884 if (hret) { 1885 pr_err("failed deregistering mcast MAC\n"); 1886 ret = -EIO; 1887 } 1888 1889 list_del(pos); 1890 kfree(mc_entry); 1891 } 1892 return ret; 1893 } 1894 1895 static void ehea_allmulti(struct net_device *dev, int enable) 1896 { 1897 struct ehea_port *port = netdev_priv(dev); 1898 u64 hret; 1899 1900 if (!port->allmulti) { 1901 if (enable) { 1902 /* Enable ALLMULTI */ 1903 ehea_drop_multicast_list(dev); 1904 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1905 if (!hret) 1906 port->allmulti = 1; 1907 else 1908 netdev_err(dev, 1909 "failed enabling IFF_ALLMULTI\n"); 1910 } 1911 } else { 1912 if (!enable) { 1913 /* Disable ALLMULTI */ 1914 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1915 if (!hret) 1916 port->allmulti = 0; 1917 else 1918 netdev_err(dev, 1919 "failed disabling IFF_ALLMULTI\n"); 1920 } 1921 } 1922 } 1923 1924 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1925 { 1926 struct ehea_mc_list *ehea_mcl_entry; 1927 u64 hret; 1928 1929 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1930 if (!ehea_mcl_entry) 1931 return; 1932 1933 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1934 1935 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1936 1937 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1938 H_REG_BCMC); 1939 if (!hret) 1940 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1941 else { 1942 pr_err("failed registering mcast MAC\n"); 1943 kfree(ehea_mcl_entry); 1944 } 1945 } 1946 1947 static void ehea_set_multicast_list(struct net_device *dev) 1948 { 1949 struct ehea_port *port = netdev_priv(dev); 1950 struct netdev_hw_addr *ha; 1951 int ret; 1952 1953 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC)); 1954 1955 if (dev->flags & IFF_ALLMULTI) { 1956 ehea_allmulti(dev, 1); 1957 goto out; 1958 } 1959 ehea_allmulti(dev, 0); 1960 1961 if (!netdev_mc_empty(dev)) { 1962 ret = ehea_drop_multicast_list(dev); 1963 if (ret) { 1964 /* Dropping the current multicast list failed. 1965 * Enabling ALL_MULTI is the best we can do. 1966 */ 1967 ehea_allmulti(dev, 1); 1968 } 1969 1970 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1971 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1972 port->adapter->max_mc_mac); 1973 goto out; 1974 } 1975 1976 netdev_for_each_mc_addr(ha, dev) 1977 ehea_add_multicast_entry(port, ha->addr); 1978 1979 } 1980 out: 1981 ehea_update_bcmc_registrations(); 1982 } 1983 1984 static int ehea_change_mtu(struct net_device *dev, int new_mtu) 1985 { 1986 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE)) 1987 return -EINVAL; 1988 dev->mtu = new_mtu; 1989 return 0; 1990 } 1991 1992 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1993 { 1994 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1995 1996 if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 1997 return; 1998 1999 if (skb->ip_summed == CHECKSUM_PARTIAL) 2000 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 2001 2002 swqe->ip_start = skb_network_offset(skb); 2003 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 2004 2005 switch (ip_hdr(skb)->protocol) { 2006 case IPPROTO_UDP: 2007 if (skb->ip_summed == CHECKSUM_PARTIAL) 2008 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2009 2010 swqe->tcp_offset = swqe->ip_end + 1 + 2011 offsetof(struct udphdr, check); 2012 break; 2013 2014 case IPPROTO_TCP: 2015 if (skb->ip_summed == CHECKSUM_PARTIAL) 2016 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2017 2018 swqe->tcp_offset = swqe->ip_end + 1 + 2019 offsetof(struct tcphdr, check); 2020 break; 2021 } 2022 } 2023 2024 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 2025 struct ehea_swqe *swqe, u32 lkey) 2026 { 2027 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 2028 2029 xmit_common(skb, swqe); 2030 2031 write_swqe2_data(skb, dev, swqe, lkey); 2032 } 2033 2034 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 2035 struct ehea_swqe *swqe) 2036 { 2037 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2038 2039 xmit_common(skb, swqe); 2040 2041 if (!skb->data_len) 2042 skb_copy_from_linear_data(skb, imm_data, skb->len); 2043 else 2044 skb_copy_bits(skb, 0, imm_data, skb->len); 2045 2046 swqe->immediate_data_length = skb->len; 2047 dev_consume_skb_any(skb); 2048 } 2049 2050 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2051 { 2052 struct ehea_port *port = netdev_priv(dev); 2053 struct ehea_swqe *swqe; 2054 u32 lkey; 2055 int swqe_index; 2056 struct ehea_port_res *pr; 2057 struct netdev_queue *txq; 2058 2059 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2060 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2061 2062 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2063 memset(swqe, 0, SWQE_HEADER_SIZE); 2064 atomic_dec(&pr->swqe_avail); 2065 2066 if (skb_vlan_tag_present(skb)) { 2067 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2068 swqe->vlan_tag = skb_vlan_tag_get(skb); 2069 } 2070 2071 pr->tx_packets++; 2072 pr->tx_bytes += skb->len; 2073 2074 if (skb->len <= SWQE3_MAX_IMM) { 2075 u32 sig_iv = port->sig_comp_iv; 2076 u32 swqe_num = pr->swqe_id_counter; 2077 ehea_xmit3(skb, dev, swqe); 2078 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2079 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2080 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2081 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2082 sig_iv); 2083 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2084 pr->swqe_ll_count = 0; 2085 } else 2086 pr->swqe_ll_count += 1; 2087 } else { 2088 swqe->wr_id = 2089 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2090 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2091 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2092 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2093 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2094 2095 pr->sq_skba.index++; 2096 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2097 2098 lkey = pr->send_mr.lkey; 2099 ehea_xmit2(skb, dev, swqe, lkey); 2100 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2101 } 2102 pr->swqe_id_counter += 1; 2103 2104 netif_info(port, tx_queued, dev, 2105 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2106 if (netif_msg_tx_queued(port)) 2107 ehea_dump(swqe, 512, "swqe"); 2108 2109 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2110 netif_tx_stop_queue(txq); 2111 swqe->tx_control |= EHEA_SWQE_PURGE; 2112 } 2113 2114 ehea_post_swqe(pr->qp, swqe); 2115 2116 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2117 pr->p_stats.queue_stopped++; 2118 netif_tx_stop_queue(txq); 2119 } 2120 2121 return NETDEV_TX_OK; 2122 } 2123 2124 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2125 { 2126 struct ehea_port *port = netdev_priv(dev); 2127 struct ehea_adapter *adapter = port->adapter; 2128 struct hcp_ehea_port_cb1 *cb1; 2129 int index; 2130 u64 hret; 2131 int err = 0; 2132 2133 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2134 if (!cb1) { 2135 pr_err("no mem for cb1\n"); 2136 err = -ENOMEM; 2137 goto out; 2138 } 2139 2140 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2141 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2142 if (hret != H_SUCCESS) { 2143 pr_err("query_ehea_port failed\n"); 2144 err = -EINVAL; 2145 goto out; 2146 } 2147 2148 index = (vid / 64); 2149 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2150 2151 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2152 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2153 if (hret != H_SUCCESS) { 2154 pr_err("modify_ehea_port failed\n"); 2155 err = -EINVAL; 2156 } 2157 out: 2158 free_page((unsigned long)cb1); 2159 return err; 2160 } 2161 2162 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2163 { 2164 struct ehea_port *port = netdev_priv(dev); 2165 struct ehea_adapter *adapter = port->adapter; 2166 struct hcp_ehea_port_cb1 *cb1; 2167 int index; 2168 u64 hret; 2169 int err = 0; 2170 2171 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2172 if (!cb1) { 2173 pr_err("no mem for cb1\n"); 2174 err = -ENOMEM; 2175 goto out; 2176 } 2177 2178 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2179 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2180 if (hret != H_SUCCESS) { 2181 pr_err("query_ehea_port failed\n"); 2182 err = -EINVAL; 2183 goto out; 2184 } 2185 2186 index = (vid / 64); 2187 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2188 2189 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2190 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2191 if (hret != H_SUCCESS) { 2192 pr_err("modify_ehea_port failed\n"); 2193 err = -EINVAL; 2194 } 2195 out: 2196 free_page((unsigned long)cb1); 2197 return err; 2198 } 2199 2200 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2201 { 2202 int ret = -EIO; 2203 u64 hret; 2204 u16 dummy16 = 0; 2205 u64 dummy64 = 0; 2206 struct hcp_modify_qp_cb0 *cb0; 2207 2208 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2209 if (!cb0) { 2210 ret = -ENOMEM; 2211 goto out; 2212 } 2213 2214 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2215 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2216 if (hret != H_SUCCESS) { 2217 pr_err("query_ehea_qp failed (1)\n"); 2218 goto out; 2219 } 2220 2221 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2222 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2223 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2224 &dummy64, &dummy64, &dummy16, &dummy16); 2225 if (hret != H_SUCCESS) { 2226 pr_err("modify_ehea_qp failed (1)\n"); 2227 goto out; 2228 } 2229 2230 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2231 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2232 if (hret != H_SUCCESS) { 2233 pr_err("query_ehea_qp failed (2)\n"); 2234 goto out; 2235 } 2236 2237 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2238 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2239 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2240 &dummy64, &dummy64, &dummy16, &dummy16); 2241 if (hret != H_SUCCESS) { 2242 pr_err("modify_ehea_qp failed (2)\n"); 2243 goto out; 2244 } 2245 2246 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2247 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2248 if (hret != H_SUCCESS) { 2249 pr_err("query_ehea_qp failed (3)\n"); 2250 goto out; 2251 } 2252 2253 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2254 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2255 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2256 &dummy64, &dummy64, &dummy16, &dummy16); 2257 if (hret != H_SUCCESS) { 2258 pr_err("modify_ehea_qp failed (3)\n"); 2259 goto out; 2260 } 2261 2262 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2263 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2264 if (hret != H_SUCCESS) { 2265 pr_err("query_ehea_qp failed (4)\n"); 2266 goto out; 2267 } 2268 2269 ret = 0; 2270 out: 2271 free_page((unsigned long)cb0); 2272 return ret; 2273 } 2274 2275 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2276 { 2277 int ret, i; 2278 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2279 enum ehea_eq_type eq_type = EHEA_EQ; 2280 2281 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2282 EHEA_MAX_ENTRIES_EQ, 1); 2283 if (!port->qp_eq) { 2284 ret = -EINVAL; 2285 pr_err("ehea_create_eq failed (qp_eq)\n"); 2286 goto out_kill_eq; 2287 } 2288 2289 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2290 pr_cfg.max_entries_scq = sq_entries * 2; 2291 pr_cfg.max_entries_sq = sq_entries; 2292 pr_cfg.max_entries_rq1 = rq1_entries; 2293 pr_cfg.max_entries_rq2 = rq2_entries; 2294 pr_cfg.max_entries_rq3 = rq3_entries; 2295 2296 pr_cfg_small_rx.max_entries_rcq = 1; 2297 pr_cfg_small_rx.max_entries_scq = sq_entries; 2298 pr_cfg_small_rx.max_entries_sq = sq_entries; 2299 pr_cfg_small_rx.max_entries_rq1 = 1; 2300 pr_cfg_small_rx.max_entries_rq2 = 1; 2301 pr_cfg_small_rx.max_entries_rq3 = 1; 2302 2303 for (i = 0; i < def_qps; i++) { 2304 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2305 if (ret) 2306 goto out_clean_pr; 2307 } 2308 for (i = def_qps; i < def_qps; i++) { 2309 ret = ehea_init_port_res(port, &port->port_res[i], 2310 &pr_cfg_small_rx, i); 2311 if (ret) 2312 goto out_clean_pr; 2313 } 2314 2315 return 0; 2316 2317 out_clean_pr: 2318 while (--i >= 0) 2319 ehea_clean_portres(port, &port->port_res[i]); 2320 2321 out_kill_eq: 2322 ehea_destroy_eq(port->qp_eq); 2323 return ret; 2324 } 2325 2326 static int ehea_clean_all_portres(struct ehea_port *port) 2327 { 2328 int ret = 0; 2329 int i; 2330 2331 for (i = 0; i < port->num_def_qps; i++) 2332 ret |= ehea_clean_portres(port, &port->port_res[i]); 2333 2334 ret |= ehea_destroy_eq(port->qp_eq); 2335 2336 return ret; 2337 } 2338 2339 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2340 { 2341 if (adapter->active_ports) 2342 return; 2343 2344 ehea_rem_mr(&adapter->mr); 2345 } 2346 2347 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2348 { 2349 if (adapter->active_ports) 2350 return 0; 2351 2352 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2353 } 2354 2355 static int ehea_up(struct net_device *dev) 2356 { 2357 int ret, i; 2358 struct ehea_port *port = netdev_priv(dev); 2359 2360 if (port->state == EHEA_PORT_UP) 2361 return 0; 2362 2363 ret = ehea_port_res_setup(port, port->num_def_qps); 2364 if (ret) { 2365 netdev_err(dev, "port_res_failed\n"); 2366 goto out; 2367 } 2368 2369 /* Set default QP for this port */ 2370 ret = ehea_configure_port(port); 2371 if (ret) { 2372 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2373 goto out_clean_pr; 2374 } 2375 2376 ret = ehea_reg_interrupts(dev); 2377 if (ret) { 2378 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2379 goto out_clean_pr; 2380 } 2381 2382 for (i = 0; i < port->num_def_qps; i++) { 2383 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2384 if (ret) { 2385 netdev_err(dev, "activate_qp failed\n"); 2386 goto out_free_irqs; 2387 } 2388 } 2389 2390 for (i = 0; i < port->num_def_qps; i++) { 2391 ret = ehea_fill_port_res(&port->port_res[i]); 2392 if (ret) { 2393 netdev_err(dev, "out_free_irqs\n"); 2394 goto out_free_irqs; 2395 } 2396 } 2397 2398 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2399 if (ret) { 2400 ret = -EIO; 2401 goto out_free_irqs; 2402 } 2403 2404 port->state = EHEA_PORT_UP; 2405 2406 ret = 0; 2407 goto out; 2408 2409 out_free_irqs: 2410 ehea_free_interrupts(dev); 2411 2412 out_clean_pr: 2413 ehea_clean_all_portres(port); 2414 out: 2415 if (ret) 2416 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2417 2418 ehea_update_bcmc_registrations(); 2419 ehea_update_firmware_handles(); 2420 2421 return ret; 2422 } 2423 2424 static void port_napi_disable(struct ehea_port *port) 2425 { 2426 int i; 2427 2428 for (i = 0; i < port->num_def_qps; i++) 2429 napi_disable(&port->port_res[i].napi); 2430 } 2431 2432 static void port_napi_enable(struct ehea_port *port) 2433 { 2434 int i; 2435 2436 for (i = 0; i < port->num_def_qps; i++) 2437 napi_enable(&port->port_res[i].napi); 2438 } 2439 2440 static int ehea_open(struct net_device *dev) 2441 { 2442 int ret; 2443 struct ehea_port *port = netdev_priv(dev); 2444 2445 mutex_lock(&port->port_lock); 2446 2447 netif_info(port, ifup, dev, "enabling port\n"); 2448 2449 ret = ehea_up(dev); 2450 if (!ret) { 2451 port_napi_enable(port); 2452 netif_tx_start_all_queues(dev); 2453 } 2454 2455 mutex_unlock(&port->port_lock); 2456 schedule_delayed_work(&port->stats_work, 2457 round_jiffies_relative(msecs_to_jiffies(1000))); 2458 2459 return ret; 2460 } 2461 2462 static int ehea_down(struct net_device *dev) 2463 { 2464 int ret; 2465 struct ehea_port *port = netdev_priv(dev); 2466 2467 if (port->state == EHEA_PORT_DOWN) 2468 return 0; 2469 2470 ehea_drop_multicast_list(dev); 2471 ehea_allmulti(dev, 0); 2472 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2473 2474 ehea_free_interrupts(dev); 2475 2476 port->state = EHEA_PORT_DOWN; 2477 2478 ehea_update_bcmc_registrations(); 2479 2480 ret = ehea_clean_all_portres(port); 2481 if (ret) 2482 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2483 2484 ehea_update_firmware_handles(); 2485 2486 return ret; 2487 } 2488 2489 static int ehea_stop(struct net_device *dev) 2490 { 2491 int ret; 2492 struct ehea_port *port = netdev_priv(dev); 2493 2494 netif_info(port, ifdown, dev, "disabling port\n"); 2495 2496 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2497 cancel_work_sync(&port->reset_task); 2498 cancel_delayed_work_sync(&port->stats_work); 2499 mutex_lock(&port->port_lock); 2500 netif_tx_stop_all_queues(dev); 2501 port_napi_disable(port); 2502 ret = ehea_down(dev); 2503 mutex_unlock(&port->port_lock); 2504 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2505 return ret; 2506 } 2507 2508 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2509 { 2510 struct ehea_qp qp = *orig_qp; 2511 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2512 struct ehea_swqe *swqe; 2513 int wqe_index; 2514 int i; 2515 2516 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2517 swqe = ehea_get_swqe(&qp, &wqe_index); 2518 swqe->tx_control |= EHEA_SWQE_PURGE; 2519 } 2520 } 2521 2522 static void ehea_flush_sq(struct ehea_port *port) 2523 { 2524 int i; 2525 2526 for (i = 0; i < port->num_def_qps; i++) { 2527 struct ehea_port_res *pr = &port->port_res[i]; 2528 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2529 int ret; 2530 2531 ret = wait_event_timeout(port->swqe_avail_wq, 2532 atomic_read(&pr->swqe_avail) >= swqe_max, 2533 msecs_to_jiffies(100)); 2534 2535 if (!ret) { 2536 pr_err("WARNING: sq not flushed completely\n"); 2537 break; 2538 } 2539 } 2540 } 2541 2542 static int ehea_stop_qps(struct net_device *dev) 2543 { 2544 struct ehea_port *port = netdev_priv(dev); 2545 struct ehea_adapter *adapter = port->adapter; 2546 struct hcp_modify_qp_cb0 *cb0; 2547 int ret = -EIO; 2548 int dret; 2549 int i; 2550 u64 hret; 2551 u64 dummy64 = 0; 2552 u16 dummy16 = 0; 2553 2554 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2555 if (!cb0) { 2556 ret = -ENOMEM; 2557 goto out; 2558 } 2559 2560 for (i = 0; i < (port->num_def_qps); i++) { 2561 struct ehea_port_res *pr = &port->port_res[i]; 2562 struct ehea_qp *qp = pr->qp; 2563 2564 /* Purge send queue */ 2565 ehea_purge_sq(qp); 2566 2567 /* Disable queue pair */ 2568 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2569 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2570 cb0); 2571 if (hret != H_SUCCESS) { 2572 pr_err("query_ehea_qp failed (1)\n"); 2573 goto out; 2574 } 2575 2576 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2577 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2578 2579 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2580 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2581 1), cb0, &dummy64, 2582 &dummy64, &dummy16, &dummy16); 2583 if (hret != H_SUCCESS) { 2584 pr_err("modify_ehea_qp failed (1)\n"); 2585 goto out; 2586 } 2587 2588 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2589 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2590 cb0); 2591 if (hret != H_SUCCESS) { 2592 pr_err("query_ehea_qp failed (2)\n"); 2593 goto out; 2594 } 2595 2596 /* deregister shared memory regions */ 2597 dret = ehea_rem_smrs(pr); 2598 if (dret) { 2599 pr_err("unreg shared memory region failed\n"); 2600 goto out; 2601 } 2602 } 2603 2604 ret = 0; 2605 out: 2606 free_page((unsigned long)cb0); 2607 2608 return ret; 2609 } 2610 2611 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2612 { 2613 struct ehea_qp qp = *orig_qp; 2614 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2615 struct ehea_rwqe *rwqe; 2616 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2617 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2618 struct sk_buff *skb; 2619 u32 lkey = pr->recv_mr.lkey; 2620 2621 2622 int i; 2623 int index; 2624 2625 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2626 rwqe = ehea_get_next_rwqe(&qp, 2); 2627 rwqe->sg_list[0].l_key = lkey; 2628 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2629 skb = skba_rq2[index]; 2630 if (skb) 2631 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2632 } 2633 2634 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2635 rwqe = ehea_get_next_rwqe(&qp, 3); 2636 rwqe->sg_list[0].l_key = lkey; 2637 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2638 skb = skba_rq3[index]; 2639 if (skb) 2640 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2641 } 2642 } 2643 2644 static int ehea_restart_qps(struct net_device *dev) 2645 { 2646 struct ehea_port *port = netdev_priv(dev); 2647 struct ehea_adapter *adapter = port->adapter; 2648 int ret = 0; 2649 int i; 2650 2651 struct hcp_modify_qp_cb0 *cb0; 2652 u64 hret; 2653 u64 dummy64 = 0; 2654 u16 dummy16 = 0; 2655 2656 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2657 if (!cb0) { 2658 ret = -ENOMEM; 2659 goto out; 2660 } 2661 2662 for (i = 0; i < (port->num_def_qps); i++) { 2663 struct ehea_port_res *pr = &port->port_res[i]; 2664 struct ehea_qp *qp = pr->qp; 2665 2666 ret = ehea_gen_smrs(pr); 2667 if (ret) { 2668 netdev_err(dev, "creation of shared memory regions failed\n"); 2669 goto out; 2670 } 2671 2672 ehea_update_rqs(qp, pr); 2673 2674 /* Enable queue pair */ 2675 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2676 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2677 cb0); 2678 if (hret != H_SUCCESS) { 2679 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2680 goto out; 2681 } 2682 2683 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2684 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2685 2686 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2687 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2688 1), cb0, &dummy64, 2689 &dummy64, &dummy16, &dummy16); 2690 if (hret != H_SUCCESS) { 2691 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2692 goto out; 2693 } 2694 2695 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2696 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2697 cb0); 2698 if (hret != H_SUCCESS) { 2699 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2700 goto out; 2701 } 2702 2703 /* refill entire queue */ 2704 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2705 ehea_refill_rq2(pr, 0); 2706 ehea_refill_rq3(pr, 0); 2707 } 2708 out: 2709 free_page((unsigned long)cb0); 2710 2711 return ret; 2712 } 2713 2714 static void ehea_reset_port(struct work_struct *work) 2715 { 2716 int ret; 2717 struct ehea_port *port = 2718 container_of(work, struct ehea_port, reset_task); 2719 struct net_device *dev = port->netdev; 2720 2721 mutex_lock(&dlpar_mem_lock); 2722 port->resets++; 2723 mutex_lock(&port->port_lock); 2724 netif_tx_disable(dev); 2725 2726 port_napi_disable(port); 2727 2728 ehea_down(dev); 2729 2730 ret = ehea_up(dev); 2731 if (ret) 2732 goto out; 2733 2734 ehea_set_multicast_list(dev); 2735 2736 netif_info(port, timer, dev, "reset successful\n"); 2737 2738 port_napi_enable(port); 2739 2740 netif_tx_wake_all_queues(dev); 2741 out: 2742 mutex_unlock(&port->port_lock); 2743 mutex_unlock(&dlpar_mem_lock); 2744 } 2745 2746 static void ehea_rereg_mrs(void) 2747 { 2748 int ret, i; 2749 struct ehea_adapter *adapter; 2750 2751 pr_info("LPAR memory changed - re-initializing driver\n"); 2752 2753 list_for_each_entry(adapter, &adapter_list, list) 2754 if (adapter->active_ports) { 2755 /* Shutdown all ports */ 2756 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2757 struct ehea_port *port = adapter->port[i]; 2758 struct net_device *dev; 2759 2760 if (!port) 2761 continue; 2762 2763 dev = port->netdev; 2764 2765 if (dev->flags & IFF_UP) { 2766 mutex_lock(&port->port_lock); 2767 netif_tx_disable(dev); 2768 ehea_flush_sq(port); 2769 ret = ehea_stop_qps(dev); 2770 if (ret) { 2771 mutex_unlock(&port->port_lock); 2772 goto out; 2773 } 2774 port_napi_disable(port); 2775 mutex_unlock(&port->port_lock); 2776 } 2777 reset_sq_restart_flag(port); 2778 } 2779 2780 /* Unregister old memory region */ 2781 ret = ehea_rem_mr(&adapter->mr); 2782 if (ret) { 2783 pr_err("unregister MR failed - driver inoperable!\n"); 2784 goto out; 2785 } 2786 } 2787 2788 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2789 2790 list_for_each_entry(adapter, &adapter_list, list) 2791 if (adapter->active_ports) { 2792 /* Register new memory region */ 2793 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2794 if (ret) { 2795 pr_err("register MR failed - driver inoperable!\n"); 2796 goto out; 2797 } 2798 2799 /* Restart all ports */ 2800 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2801 struct ehea_port *port = adapter->port[i]; 2802 2803 if (port) { 2804 struct net_device *dev = port->netdev; 2805 2806 if (dev->flags & IFF_UP) { 2807 mutex_lock(&port->port_lock); 2808 ret = ehea_restart_qps(dev); 2809 if (!ret) { 2810 check_sqs(port); 2811 port_napi_enable(port); 2812 netif_tx_wake_all_queues(dev); 2813 } else { 2814 netdev_err(dev, "Unable to restart QPS\n"); 2815 } 2816 mutex_unlock(&port->port_lock); 2817 } 2818 } 2819 } 2820 } 2821 pr_info("re-initializing driver complete\n"); 2822 out: 2823 return; 2824 } 2825 2826 static void ehea_tx_watchdog(struct net_device *dev) 2827 { 2828 struct ehea_port *port = netdev_priv(dev); 2829 2830 if (netif_carrier_ok(dev) && 2831 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2832 ehea_schedule_port_reset(port); 2833 } 2834 2835 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2836 { 2837 struct hcp_query_ehea *cb; 2838 u64 hret; 2839 int ret; 2840 2841 cb = (void *)get_zeroed_page(GFP_KERNEL); 2842 if (!cb) { 2843 ret = -ENOMEM; 2844 goto out; 2845 } 2846 2847 hret = ehea_h_query_ehea(adapter->handle, cb); 2848 2849 if (hret != H_SUCCESS) { 2850 ret = -EIO; 2851 goto out_herr; 2852 } 2853 2854 adapter->max_mc_mac = cb->max_mc_mac - 1; 2855 ret = 0; 2856 2857 out_herr: 2858 free_page((unsigned long)cb); 2859 out: 2860 return ret; 2861 } 2862 2863 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2864 { 2865 struct hcp_ehea_port_cb4 *cb4; 2866 u64 hret; 2867 int ret = 0; 2868 2869 *jumbo = 0; 2870 2871 /* (Try to) enable *jumbo frames */ 2872 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2873 if (!cb4) { 2874 pr_err("no mem for cb4\n"); 2875 ret = -ENOMEM; 2876 goto out; 2877 } else { 2878 hret = ehea_h_query_ehea_port(port->adapter->handle, 2879 port->logical_port_id, 2880 H_PORT_CB4, 2881 H_PORT_CB4_JUMBO, cb4); 2882 if (hret == H_SUCCESS) { 2883 if (cb4->jumbo_frame) 2884 *jumbo = 1; 2885 else { 2886 cb4->jumbo_frame = 1; 2887 hret = ehea_h_modify_ehea_port(port->adapter-> 2888 handle, 2889 port-> 2890 logical_port_id, 2891 H_PORT_CB4, 2892 H_PORT_CB4_JUMBO, 2893 cb4); 2894 if (hret == H_SUCCESS) 2895 *jumbo = 1; 2896 } 2897 } else 2898 ret = -EINVAL; 2899 2900 free_page((unsigned long)cb4); 2901 } 2902 out: 2903 return ret; 2904 } 2905 2906 static ssize_t ehea_show_port_id(struct device *dev, 2907 struct device_attribute *attr, char *buf) 2908 { 2909 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2910 return sprintf(buf, "%d", port->logical_port_id); 2911 } 2912 2913 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id, 2914 NULL); 2915 2916 static void logical_port_release(struct device *dev) 2917 { 2918 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2919 of_node_put(port->ofdev.dev.of_node); 2920 } 2921 2922 static struct device *ehea_register_port(struct ehea_port *port, 2923 struct device_node *dn) 2924 { 2925 int ret; 2926 2927 port->ofdev.dev.of_node = of_node_get(dn); 2928 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2929 port->ofdev.dev.bus = &ibmebus_bus_type; 2930 2931 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2932 port->ofdev.dev.release = logical_port_release; 2933 2934 ret = of_device_register(&port->ofdev); 2935 if (ret) { 2936 pr_err("failed to register device. ret=%d\n", ret); 2937 goto out; 2938 } 2939 2940 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2941 if (ret) { 2942 pr_err("failed to register attributes, ret=%d\n", ret); 2943 goto out_unreg_of_dev; 2944 } 2945 2946 return &port->ofdev.dev; 2947 2948 out_unreg_of_dev: 2949 of_device_unregister(&port->ofdev); 2950 out: 2951 return NULL; 2952 } 2953 2954 static void ehea_unregister_port(struct ehea_port *port) 2955 { 2956 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2957 of_device_unregister(&port->ofdev); 2958 } 2959 2960 static const struct net_device_ops ehea_netdev_ops = { 2961 .ndo_open = ehea_open, 2962 .ndo_stop = ehea_stop, 2963 .ndo_start_xmit = ehea_start_xmit, 2964 #ifdef CONFIG_NET_POLL_CONTROLLER 2965 .ndo_poll_controller = ehea_netpoll, 2966 #endif 2967 .ndo_get_stats64 = ehea_get_stats64, 2968 .ndo_set_mac_address = ehea_set_mac_addr, 2969 .ndo_validate_addr = eth_validate_addr, 2970 .ndo_set_rx_mode = ehea_set_multicast_list, 2971 .ndo_change_mtu = ehea_change_mtu, 2972 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2973 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2974 .ndo_tx_timeout = ehea_tx_watchdog, 2975 }; 2976 2977 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2978 u32 logical_port_id, 2979 struct device_node *dn) 2980 { 2981 int ret; 2982 struct net_device *dev; 2983 struct ehea_port *port; 2984 struct device *port_dev; 2985 int jumbo; 2986 2987 /* allocate memory for the port structures */ 2988 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2989 2990 if (!dev) { 2991 ret = -ENOMEM; 2992 goto out_err; 2993 } 2994 2995 port = netdev_priv(dev); 2996 2997 mutex_init(&port->port_lock); 2998 port->state = EHEA_PORT_DOWN; 2999 port->sig_comp_iv = sq_entries / 10; 3000 3001 port->adapter = adapter; 3002 port->netdev = dev; 3003 port->logical_port_id = logical_port_id; 3004 3005 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 3006 3007 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 3008 if (!port->mc_list) { 3009 ret = -ENOMEM; 3010 goto out_free_ethdev; 3011 } 3012 3013 INIT_LIST_HEAD(&port->mc_list->list); 3014 3015 ret = ehea_sense_port_attr(port); 3016 if (ret) 3017 goto out_free_mc_list; 3018 3019 netif_set_real_num_rx_queues(dev, port->num_def_qps); 3020 netif_set_real_num_tx_queues(dev, port->num_def_qps); 3021 3022 port_dev = ehea_register_port(port, dn); 3023 if (!port_dev) 3024 goto out_free_mc_list; 3025 3026 SET_NETDEV_DEV(dev, port_dev); 3027 3028 /* initialize net_device structure */ 3029 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); 3030 3031 dev->netdev_ops = &ehea_netdev_ops; 3032 ehea_set_ethtool_ops(dev); 3033 3034 dev->hw_features = NETIF_F_SG | NETIF_F_TSO | 3035 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX; 3036 dev->features = NETIF_F_SG | NETIF_F_TSO | 3037 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | 3038 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 3039 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM; 3040 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3041 NETIF_F_IP_CSUM; 3042 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3043 3044 INIT_WORK(&port->reset_task, ehea_reset_port); 3045 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3046 3047 init_waitqueue_head(&port->swqe_avail_wq); 3048 init_waitqueue_head(&port->restart_wq); 3049 3050 memset(&port->stats, 0, sizeof(struct net_device_stats)); 3051 ret = register_netdev(dev); 3052 if (ret) { 3053 pr_err("register_netdev failed. ret=%d\n", ret); 3054 goto out_unreg_port; 3055 } 3056 3057 ret = ehea_get_jumboframe_status(port, &jumbo); 3058 if (ret) 3059 netdev_err(dev, "failed determining jumbo frame status\n"); 3060 3061 netdev_info(dev, "Jumbo frames are %sabled\n", 3062 jumbo == 1 ? "en" : "dis"); 3063 3064 adapter->active_ports++; 3065 3066 return port; 3067 3068 out_unreg_port: 3069 ehea_unregister_port(port); 3070 3071 out_free_mc_list: 3072 kfree(port->mc_list); 3073 3074 out_free_ethdev: 3075 free_netdev(dev); 3076 3077 out_err: 3078 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3079 logical_port_id, ret); 3080 return NULL; 3081 } 3082 3083 static void ehea_shutdown_single_port(struct ehea_port *port) 3084 { 3085 struct ehea_adapter *adapter = port->adapter; 3086 3087 cancel_work_sync(&port->reset_task); 3088 cancel_delayed_work_sync(&port->stats_work); 3089 unregister_netdev(port->netdev); 3090 ehea_unregister_port(port); 3091 kfree(port->mc_list); 3092 free_netdev(port->netdev); 3093 adapter->active_ports--; 3094 } 3095 3096 static int ehea_setup_ports(struct ehea_adapter *adapter) 3097 { 3098 struct device_node *lhea_dn; 3099 struct device_node *eth_dn = NULL; 3100 3101 const u32 *dn_log_port_id; 3102 int i = 0; 3103 3104 lhea_dn = adapter->ofdev->dev.of_node; 3105 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3106 3107 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3108 NULL); 3109 if (!dn_log_port_id) { 3110 pr_err("bad device node: eth_dn name=%s\n", 3111 eth_dn->full_name); 3112 continue; 3113 } 3114 3115 if (ehea_add_adapter_mr(adapter)) { 3116 pr_err("creating MR failed\n"); 3117 of_node_put(eth_dn); 3118 return -EIO; 3119 } 3120 3121 adapter->port[i] = ehea_setup_single_port(adapter, 3122 *dn_log_port_id, 3123 eth_dn); 3124 if (adapter->port[i]) 3125 netdev_info(adapter->port[i]->netdev, 3126 "logical port id #%d\n", *dn_log_port_id); 3127 else 3128 ehea_remove_adapter_mr(adapter); 3129 3130 i++; 3131 } 3132 return 0; 3133 } 3134 3135 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3136 u32 logical_port_id) 3137 { 3138 struct device_node *lhea_dn; 3139 struct device_node *eth_dn = NULL; 3140 const u32 *dn_log_port_id; 3141 3142 lhea_dn = adapter->ofdev->dev.of_node; 3143 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3144 3145 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3146 NULL); 3147 if (dn_log_port_id) 3148 if (*dn_log_port_id == logical_port_id) 3149 return eth_dn; 3150 } 3151 3152 return NULL; 3153 } 3154 3155 static ssize_t ehea_probe_port(struct device *dev, 3156 struct device_attribute *attr, 3157 const char *buf, size_t count) 3158 { 3159 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3160 struct ehea_port *port; 3161 struct device_node *eth_dn = NULL; 3162 int i; 3163 3164 u32 logical_port_id; 3165 3166 sscanf(buf, "%d", &logical_port_id); 3167 3168 port = ehea_get_port(adapter, logical_port_id); 3169 3170 if (port) { 3171 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3172 logical_port_id); 3173 return -EINVAL; 3174 } 3175 3176 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3177 3178 if (!eth_dn) { 3179 pr_info("no logical port with id %d found\n", logical_port_id); 3180 return -EINVAL; 3181 } 3182 3183 if (ehea_add_adapter_mr(adapter)) { 3184 pr_err("creating MR failed\n"); 3185 return -EIO; 3186 } 3187 3188 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3189 3190 of_node_put(eth_dn); 3191 3192 if (port) { 3193 for (i = 0; i < EHEA_MAX_PORTS; i++) 3194 if (!adapter->port[i]) { 3195 adapter->port[i] = port; 3196 break; 3197 } 3198 3199 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3200 logical_port_id); 3201 } else { 3202 ehea_remove_adapter_mr(adapter); 3203 return -EIO; 3204 } 3205 3206 return (ssize_t) count; 3207 } 3208 3209 static ssize_t ehea_remove_port(struct device *dev, 3210 struct device_attribute *attr, 3211 const char *buf, size_t count) 3212 { 3213 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3214 struct ehea_port *port; 3215 int i; 3216 u32 logical_port_id; 3217 3218 sscanf(buf, "%d", &logical_port_id); 3219 3220 port = ehea_get_port(adapter, logical_port_id); 3221 3222 if (port) { 3223 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3224 logical_port_id); 3225 3226 ehea_shutdown_single_port(port); 3227 3228 for (i = 0; i < EHEA_MAX_PORTS; i++) 3229 if (adapter->port[i] == port) { 3230 adapter->port[i] = NULL; 3231 break; 3232 } 3233 } else { 3234 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3235 logical_port_id); 3236 return -EINVAL; 3237 } 3238 3239 ehea_remove_adapter_mr(adapter); 3240 3241 return (ssize_t) count; 3242 } 3243 3244 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port); 3245 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port); 3246 3247 static int ehea_create_device_sysfs(struct platform_device *dev) 3248 { 3249 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3250 if (ret) 3251 goto out; 3252 3253 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3254 out: 3255 return ret; 3256 } 3257 3258 static void ehea_remove_device_sysfs(struct platform_device *dev) 3259 { 3260 device_remove_file(&dev->dev, &dev_attr_probe_port); 3261 device_remove_file(&dev->dev, &dev_attr_remove_port); 3262 } 3263 3264 static int ehea_reboot_notifier(struct notifier_block *nb, 3265 unsigned long action, void *unused) 3266 { 3267 if (action == SYS_RESTART) { 3268 pr_info("Reboot: freeing all eHEA resources\n"); 3269 ibmebus_unregister_driver(&ehea_driver); 3270 } 3271 return NOTIFY_DONE; 3272 } 3273 3274 static struct notifier_block ehea_reboot_nb = { 3275 .notifier_call = ehea_reboot_notifier, 3276 }; 3277 3278 static int ehea_mem_notifier(struct notifier_block *nb, 3279 unsigned long action, void *data) 3280 { 3281 int ret = NOTIFY_BAD; 3282 struct memory_notify *arg = data; 3283 3284 mutex_lock(&dlpar_mem_lock); 3285 3286 switch (action) { 3287 case MEM_CANCEL_OFFLINE: 3288 pr_info("memory offlining canceled"); 3289 /* Fall through: re-add canceled memory block */ 3290 3291 case MEM_ONLINE: 3292 pr_info("memory is going online"); 3293 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3294 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3295 goto out_unlock; 3296 ehea_rereg_mrs(); 3297 break; 3298 3299 case MEM_GOING_OFFLINE: 3300 pr_info("memory is going offline"); 3301 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3302 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3303 goto out_unlock; 3304 ehea_rereg_mrs(); 3305 break; 3306 3307 default: 3308 break; 3309 } 3310 3311 ehea_update_firmware_handles(); 3312 ret = NOTIFY_OK; 3313 3314 out_unlock: 3315 mutex_unlock(&dlpar_mem_lock); 3316 return ret; 3317 } 3318 3319 static struct notifier_block ehea_mem_nb = { 3320 .notifier_call = ehea_mem_notifier, 3321 }; 3322 3323 static void ehea_crash_handler(void) 3324 { 3325 int i; 3326 3327 if (ehea_fw_handles.arr) 3328 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3329 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3330 ehea_fw_handles.arr[i].fwh, 3331 FORCE_FREE); 3332 3333 if (ehea_bcmc_regs.arr) 3334 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3335 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3336 ehea_bcmc_regs.arr[i].port_id, 3337 ehea_bcmc_regs.arr[i].reg_type, 3338 ehea_bcmc_regs.arr[i].macaddr, 3339 0, H_DEREG_BCMC); 3340 } 3341 3342 static atomic_t ehea_memory_hooks_registered; 3343 3344 /* Register memory hooks on probe of first adapter */ 3345 static int ehea_register_memory_hooks(void) 3346 { 3347 int ret = 0; 3348 3349 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1) 3350 return 0; 3351 3352 ret = ehea_create_busmap(); 3353 if (ret) { 3354 pr_info("ehea_create_busmap failed\n"); 3355 goto out; 3356 } 3357 3358 ret = register_reboot_notifier(&ehea_reboot_nb); 3359 if (ret) { 3360 pr_info("register_reboot_notifier failed\n"); 3361 goto out; 3362 } 3363 3364 ret = register_memory_notifier(&ehea_mem_nb); 3365 if (ret) { 3366 pr_info("register_memory_notifier failed\n"); 3367 goto out2; 3368 } 3369 3370 ret = crash_shutdown_register(ehea_crash_handler); 3371 if (ret) { 3372 pr_info("crash_shutdown_register failed\n"); 3373 goto out3; 3374 } 3375 3376 return 0; 3377 3378 out3: 3379 unregister_memory_notifier(&ehea_mem_nb); 3380 out2: 3381 unregister_reboot_notifier(&ehea_reboot_nb); 3382 out: 3383 atomic_dec(&ehea_memory_hooks_registered); 3384 return ret; 3385 } 3386 3387 static void ehea_unregister_memory_hooks(void) 3388 { 3389 /* Only remove the hooks if we've registered them */ 3390 if (atomic_read(&ehea_memory_hooks_registered) == 0) 3391 return; 3392 3393 unregister_reboot_notifier(&ehea_reboot_nb); 3394 if (crash_shutdown_unregister(ehea_crash_handler)) 3395 pr_info("failed unregistering crash handler\n"); 3396 unregister_memory_notifier(&ehea_mem_nb); 3397 } 3398 3399 static int ehea_probe_adapter(struct platform_device *dev) 3400 { 3401 struct ehea_adapter *adapter; 3402 const u64 *adapter_handle; 3403 int ret; 3404 int i; 3405 3406 ret = ehea_register_memory_hooks(); 3407 if (ret) 3408 return ret; 3409 3410 if (!dev || !dev->dev.of_node) { 3411 pr_err("Invalid ibmebus device probed\n"); 3412 return -EINVAL; 3413 } 3414 3415 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL); 3416 if (!adapter) { 3417 ret = -ENOMEM; 3418 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3419 goto out; 3420 } 3421 3422 list_add(&adapter->list, &adapter_list); 3423 3424 adapter->ofdev = dev; 3425 3426 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3427 NULL); 3428 if (adapter_handle) 3429 adapter->handle = *adapter_handle; 3430 3431 if (!adapter->handle) { 3432 dev_err(&dev->dev, "failed getting handle for adapter" 3433 " '%s'\n", dev->dev.of_node->full_name); 3434 ret = -ENODEV; 3435 goto out_free_ad; 3436 } 3437 3438 adapter->pd = EHEA_PD_ID; 3439 3440 platform_set_drvdata(dev, adapter); 3441 3442 3443 /* initialize adapter and ports */ 3444 /* get adapter properties */ 3445 ret = ehea_sense_adapter_attr(adapter); 3446 if (ret) { 3447 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3448 goto out_free_ad; 3449 } 3450 3451 adapter->neq = ehea_create_eq(adapter, 3452 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3453 if (!adapter->neq) { 3454 ret = -EIO; 3455 dev_err(&dev->dev, "NEQ creation failed\n"); 3456 goto out_free_ad; 3457 } 3458 3459 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, 3460 (unsigned long)adapter); 3461 3462 ret = ehea_create_device_sysfs(dev); 3463 if (ret) 3464 goto out_kill_eq; 3465 3466 ret = ehea_setup_ports(adapter); 3467 if (ret) { 3468 dev_err(&dev->dev, "setup_ports failed\n"); 3469 goto out_rem_dev_sysfs; 3470 } 3471 3472 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3473 ehea_interrupt_neq, 0, 3474 "ehea_neq", adapter); 3475 if (ret) { 3476 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3477 goto out_shutdown_ports; 3478 } 3479 3480 /* Handle any events that might be pending. */ 3481 tasklet_hi_schedule(&adapter->neq_tasklet); 3482 3483 ret = 0; 3484 goto out; 3485 3486 out_shutdown_ports: 3487 for (i = 0; i < EHEA_MAX_PORTS; i++) 3488 if (adapter->port[i]) { 3489 ehea_shutdown_single_port(adapter->port[i]); 3490 adapter->port[i] = NULL; 3491 } 3492 3493 out_rem_dev_sysfs: 3494 ehea_remove_device_sysfs(dev); 3495 3496 out_kill_eq: 3497 ehea_destroy_eq(adapter->neq); 3498 3499 out_free_ad: 3500 list_del(&adapter->list); 3501 3502 out: 3503 ehea_update_firmware_handles(); 3504 3505 return ret; 3506 } 3507 3508 static int ehea_remove(struct platform_device *dev) 3509 { 3510 struct ehea_adapter *adapter = platform_get_drvdata(dev); 3511 int i; 3512 3513 for (i = 0; i < EHEA_MAX_PORTS; i++) 3514 if (adapter->port[i]) { 3515 ehea_shutdown_single_port(adapter->port[i]); 3516 adapter->port[i] = NULL; 3517 } 3518 3519 ehea_remove_device_sysfs(dev); 3520 3521 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3522 tasklet_kill(&adapter->neq_tasklet); 3523 3524 ehea_destroy_eq(adapter->neq); 3525 ehea_remove_adapter_mr(adapter); 3526 list_del(&adapter->list); 3527 3528 ehea_update_firmware_handles(); 3529 3530 return 0; 3531 } 3532 3533 static int check_module_parm(void) 3534 { 3535 int ret = 0; 3536 3537 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3538 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3539 pr_info("Bad parameter: rq1_entries\n"); 3540 ret = -EINVAL; 3541 } 3542 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3543 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3544 pr_info("Bad parameter: rq2_entries\n"); 3545 ret = -EINVAL; 3546 } 3547 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3548 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3549 pr_info("Bad parameter: rq3_entries\n"); 3550 ret = -EINVAL; 3551 } 3552 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3553 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3554 pr_info("Bad parameter: sq_entries\n"); 3555 ret = -EINVAL; 3556 } 3557 3558 return ret; 3559 } 3560 3561 static ssize_t ehea_show_capabilities(struct device_driver *drv, 3562 char *buf) 3563 { 3564 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3565 } 3566 3567 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH, 3568 ehea_show_capabilities, NULL); 3569 3570 static int __init ehea_module_init(void) 3571 { 3572 int ret; 3573 3574 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3575 3576 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3577 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3578 3579 mutex_init(&ehea_fw_handles.lock); 3580 spin_lock_init(&ehea_bcmc_regs.lock); 3581 3582 ret = check_module_parm(); 3583 if (ret) 3584 goto out; 3585 3586 ret = ibmebus_register_driver(&ehea_driver); 3587 if (ret) { 3588 pr_err("failed registering eHEA device driver on ebus\n"); 3589 goto out; 3590 } 3591 3592 ret = driver_create_file(&ehea_driver.driver, 3593 &driver_attr_capabilities); 3594 if (ret) { 3595 pr_err("failed to register capabilities attribute, ret=%d\n", 3596 ret); 3597 goto out2; 3598 } 3599 3600 return ret; 3601 3602 out2: 3603 ibmebus_unregister_driver(&ehea_driver); 3604 out: 3605 return ret; 3606 } 3607 3608 static void __exit ehea_module_exit(void) 3609 { 3610 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3611 ibmebus_unregister_driver(&ehea_driver); 3612 ehea_unregister_memory_hooks(); 3613 kfree(ehea_fw_handles.arr); 3614 kfree(ehea_bcmc_regs.arr); 3615 ehea_destroy_busmap(); 3616 } 3617 3618 module_init(ehea_module_init); 3619 module_exit(ehea_module_exit); 3620