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 void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1985 { 1986 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1987 1988 if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 1989 return; 1990 1991 if (skb->ip_summed == CHECKSUM_PARTIAL) 1992 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 1993 1994 swqe->ip_start = skb_network_offset(skb); 1995 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 1996 1997 switch (ip_hdr(skb)->protocol) { 1998 case IPPROTO_UDP: 1999 if (skb->ip_summed == CHECKSUM_PARTIAL) 2000 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2001 2002 swqe->tcp_offset = swqe->ip_end + 1 + 2003 offsetof(struct udphdr, check); 2004 break; 2005 2006 case IPPROTO_TCP: 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 tcphdr, check); 2012 break; 2013 } 2014 } 2015 2016 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 2017 struct ehea_swqe *swqe, u32 lkey) 2018 { 2019 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 2020 2021 xmit_common(skb, swqe); 2022 2023 write_swqe2_data(skb, dev, swqe, lkey); 2024 } 2025 2026 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 2027 struct ehea_swqe *swqe) 2028 { 2029 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2030 2031 xmit_common(skb, swqe); 2032 2033 if (!skb->data_len) 2034 skb_copy_from_linear_data(skb, imm_data, skb->len); 2035 else 2036 skb_copy_bits(skb, 0, imm_data, skb->len); 2037 2038 swqe->immediate_data_length = skb->len; 2039 dev_consume_skb_any(skb); 2040 } 2041 2042 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2043 { 2044 struct ehea_port *port = netdev_priv(dev); 2045 struct ehea_swqe *swqe; 2046 u32 lkey; 2047 int swqe_index; 2048 struct ehea_port_res *pr; 2049 struct netdev_queue *txq; 2050 2051 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2052 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2053 2054 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2055 memset(swqe, 0, SWQE_HEADER_SIZE); 2056 atomic_dec(&pr->swqe_avail); 2057 2058 if (skb_vlan_tag_present(skb)) { 2059 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2060 swqe->vlan_tag = skb_vlan_tag_get(skb); 2061 } 2062 2063 pr->tx_packets++; 2064 pr->tx_bytes += skb->len; 2065 2066 if (skb->len <= SWQE3_MAX_IMM) { 2067 u32 sig_iv = port->sig_comp_iv; 2068 u32 swqe_num = pr->swqe_id_counter; 2069 ehea_xmit3(skb, dev, swqe); 2070 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2071 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2072 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2073 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2074 sig_iv); 2075 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2076 pr->swqe_ll_count = 0; 2077 } else 2078 pr->swqe_ll_count += 1; 2079 } else { 2080 swqe->wr_id = 2081 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2082 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2083 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2084 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2085 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2086 2087 pr->sq_skba.index++; 2088 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2089 2090 lkey = pr->send_mr.lkey; 2091 ehea_xmit2(skb, dev, swqe, lkey); 2092 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2093 } 2094 pr->swqe_id_counter += 1; 2095 2096 netif_info(port, tx_queued, dev, 2097 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2098 if (netif_msg_tx_queued(port)) 2099 ehea_dump(swqe, 512, "swqe"); 2100 2101 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2102 netif_tx_stop_queue(txq); 2103 swqe->tx_control |= EHEA_SWQE_PURGE; 2104 } 2105 2106 ehea_post_swqe(pr->qp, swqe); 2107 2108 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2109 pr->p_stats.queue_stopped++; 2110 netif_tx_stop_queue(txq); 2111 } 2112 2113 return NETDEV_TX_OK; 2114 } 2115 2116 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2117 { 2118 struct ehea_port *port = netdev_priv(dev); 2119 struct ehea_adapter *adapter = port->adapter; 2120 struct hcp_ehea_port_cb1 *cb1; 2121 int index; 2122 u64 hret; 2123 int err = 0; 2124 2125 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2126 if (!cb1) { 2127 pr_err("no mem for cb1\n"); 2128 err = -ENOMEM; 2129 goto out; 2130 } 2131 2132 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2133 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2134 if (hret != H_SUCCESS) { 2135 pr_err("query_ehea_port failed\n"); 2136 err = -EINVAL; 2137 goto out; 2138 } 2139 2140 index = (vid / 64); 2141 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2142 2143 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2144 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2145 if (hret != H_SUCCESS) { 2146 pr_err("modify_ehea_port failed\n"); 2147 err = -EINVAL; 2148 } 2149 out: 2150 free_page((unsigned long)cb1); 2151 return err; 2152 } 2153 2154 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2155 { 2156 struct ehea_port *port = netdev_priv(dev); 2157 struct ehea_adapter *adapter = port->adapter; 2158 struct hcp_ehea_port_cb1 *cb1; 2159 int index; 2160 u64 hret; 2161 int err = 0; 2162 2163 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2164 if (!cb1) { 2165 pr_err("no mem for cb1\n"); 2166 err = -ENOMEM; 2167 goto out; 2168 } 2169 2170 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2171 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2172 if (hret != H_SUCCESS) { 2173 pr_err("query_ehea_port failed\n"); 2174 err = -EINVAL; 2175 goto out; 2176 } 2177 2178 index = (vid / 64); 2179 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2180 2181 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2182 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2183 if (hret != H_SUCCESS) { 2184 pr_err("modify_ehea_port failed\n"); 2185 err = -EINVAL; 2186 } 2187 out: 2188 free_page((unsigned long)cb1); 2189 return err; 2190 } 2191 2192 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2193 { 2194 int ret = -EIO; 2195 u64 hret; 2196 u16 dummy16 = 0; 2197 u64 dummy64 = 0; 2198 struct hcp_modify_qp_cb0 *cb0; 2199 2200 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2201 if (!cb0) { 2202 ret = -ENOMEM; 2203 goto out; 2204 } 2205 2206 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2207 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2208 if (hret != H_SUCCESS) { 2209 pr_err("query_ehea_qp failed (1)\n"); 2210 goto out; 2211 } 2212 2213 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2214 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2215 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2216 &dummy64, &dummy64, &dummy16, &dummy16); 2217 if (hret != H_SUCCESS) { 2218 pr_err("modify_ehea_qp failed (1)\n"); 2219 goto out; 2220 } 2221 2222 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2223 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2224 if (hret != H_SUCCESS) { 2225 pr_err("query_ehea_qp failed (2)\n"); 2226 goto out; 2227 } 2228 2229 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2230 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2231 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2232 &dummy64, &dummy64, &dummy16, &dummy16); 2233 if (hret != H_SUCCESS) { 2234 pr_err("modify_ehea_qp failed (2)\n"); 2235 goto out; 2236 } 2237 2238 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2239 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2240 if (hret != H_SUCCESS) { 2241 pr_err("query_ehea_qp failed (3)\n"); 2242 goto out; 2243 } 2244 2245 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2246 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2247 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2248 &dummy64, &dummy64, &dummy16, &dummy16); 2249 if (hret != H_SUCCESS) { 2250 pr_err("modify_ehea_qp failed (3)\n"); 2251 goto out; 2252 } 2253 2254 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2255 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2256 if (hret != H_SUCCESS) { 2257 pr_err("query_ehea_qp failed (4)\n"); 2258 goto out; 2259 } 2260 2261 ret = 0; 2262 out: 2263 free_page((unsigned long)cb0); 2264 return ret; 2265 } 2266 2267 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2268 { 2269 int ret, i; 2270 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2271 enum ehea_eq_type eq_type = EHEA_EQ; 2272 2273 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2274 EHEA_MAX_ENTRIES_EQ, 1); 2275 if (!port->qp_eq) { 2276 ret = -EINVAL; 2277 pr_err("ehea_create_eq failed (qp_eq)\n"); 2278 goto out_kill_eq; 2279 } 2280 2281 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2282 pr_cfg.max_entries_scq = sq_entries * 2; 2283 pr_cfg.max_entries_sq = sq_entries; 2284 pr_cfg.max_entries_rq1 = rq1_entries; 2285 pr_cfg.max_entries_rq2 = rq2_entries; 2286 pr_cfg.max_entries_rq3 = rq3_entries; 2287 2288 pr_cfg_small_rx.max_entries_rcq = 1; 2289 pr_cfg_small_rx.max_entries_scq = sq_entries; 2290 pr_cfg_small_rx.max_entries_sq = sq_entries; 2291 pr_cfg_small_rx.max_entries_rq1 = 1; 2292 pr_cfg_small_rx.max_entries_rq2 = 1; 2293 pr_cfg_small_rx.max_entries_rq3 = 1; 2294 2295 for (i = 0; i < def_qps; i++) { 2296 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2297 if (ret) 2298 goto out_clean_pr; 2299 } 2300 for (i = def_qps; i < def_qps; i++) { 2301 ret = ehea_init_port_res(port, &port->port_res[i], 2302 &pr_cfg_small_rx, i); 2303 if (ret) 2304 goto out_clean_pr; 2305 } 2306 2307 return 0; 2308 2309 out_clean_pr: 2310 while (--i >= 0) 2311 ehea_clean_portres(port, &port->port_res[i]); 2312 2313 out_kill_eq: 2314 ehea_destroy_eq(port->qp_eq); 2315 return ret; 2316 } 2317 2318 static int ehea_clean_all_portres(struct ehea_port *port) 2319 { 2320 int ret = 0; 2321 int i; 2322 2323 for (i = 0; i < port->num_def_qps; i++) 2324 ret |= ehea_clean_portres(port, &port->port_res[i]); 2325 2326 ret |= ehea_destroy_eq(port->qp_eq); 2327 2328 return ret; 2329 } 2330 2331 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2332 { 2333 if (adapter->active_ports) 2334 return; 2335 2336 ehea_rem_mr(&adapter->mr); 2337 } 2338 2339 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2340 { 2341 if (adapter->active_ports) 2342 return 0; 2343 2344 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2345 } 2346 2347 static int ehea_up(struct net_device *dev) 2348 { 2349 int ret, i; 2350 struct ehea_port *port = netdev_priv(dev); 2351 2352 if (port->state == EHEA_PORT_UP) 2353 return 0; 2354 2355 ret = ehea_port_res_setup(port, port->num_def_qps); 2356 if (ret) { 2357 netdev_err(dev, "port_res_failed\n"); 2358 goto out; 2359 } 2360 2361 /* Set default QP for this port */ 2362 ret = ehea_configure_port(port); 2363 if (ret) { 2364 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2365 goto out_clean_pr; 2366 } 2367 2368 ret = ehea_reg_interrupts(dev); 2369 if (ret) { 2370 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2371 goto out_clean_pr; 2372 } 2373 2374 for (i = 0; i < port->num_def_qps; i++) { 2375 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2376 if (ret) { 2377 netdev_err(dev, "activate_qp failed\n"); 2378 goto out_free_irqs; 2379 } 2380 } 2381 2382 for (i = 0; i < port->num_def_qps; i++) { 2383 ret = ehea_fill_port_res(&port->port_res[i]); 2384 if (ret) { 2385 netdev_err(dev, "out_free_irqs\n"); 2386 goto out_free_irqs; 2387 } 2388 } 2389 2390 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2391 if (ret) { 2392 ret = -EIO; 2393 goto out_free_irqs; 2394 } 2395 2396 port->state = EHEA_PORT_UP; 2397 2398 ret = 0; 2399 goto out; 2400 2401 out_free_irqs: 2402 ehea_free_interrupts(dev); 2403 2404 out_clean_pr: 2405 ehea_clean_all_portres(port); 2406 out: 2407 if (ret) 2408 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2409 2410 ehea_update_bcmc_registrations(); 2411 ehea_update_firmware_handles(); 2412 2413 return ret; 2414 } 2415 2416 static void port_napi_disable(struct ehea_port *port) 2417 { 2418 int i; 2419 2420 for (i = 0; i < port->num_def_qps; i++) 2421 napi_disable(&port->port_res[i].napi); 2422 } 2423 2424 static void port_napi_enable(struct ehea_port *port) 2425 { 2426 int i; 2427 2428 for (i = 0; i < port->num_def_qps; i++) 2429 napi_enable(&port->port_res[i].napi); 2430 } 2431 2432 static int ehea_open(struct net_device *dev) 2433 { 2434 int ret; 2435 struct ehea_port *port = netdev_priv(dev); 2436 2437 mutex_lock(&port->port_lock); 2438 2439 netif_info(port, ifup, dev, "enabling port\n"); 2440 2441 netif_carrier_off(dev); 2442 2443 ret = ehea_up(dev); 2444 if (!ret) { 2445 port_napi_enable(port); 2446 netif_tx_start_all_queues(dev); 2447 } 2448 2449 mutex_unlock(&port->port_lock); 2450 schedule_delayed_work(&port->stats_work, 2451 round_jiffies_relative(msecs_to_jiffies(1000))); 2452 2453 return ret; 2454 } 2455 2456 static int ehea_down(struct net_device *dev) 2457 { 2458 int ret; 2459 struct ehea_port *port = netdev_priv(dev); 2460 2461 if (port->state == EHEA_PORT_DOWN) 2462 return 0; 2463 2464 ehea_drop_multicast_list(dev); 2465 ehea_allmulti(dev, 0); 2466 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2467 2468 ehea_free_interrupts(dev); 2469 2470 port->state = EHEA_PORT_DOWN; 2471 2472 ehea_update_bcmc_registrations(); 2473 2474 ret = ehea_clean_all_portres(port); 2475 if (ret) 2476 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2477 2478 ehea_update_firmware_handles(); 2479 2480 return ret; 2481 } 2482 2483 static int ehea_stop(struct net_device *dev) 2484 { 2485 int ret; 2486 struct ehea_port *port = netdev_priv(dev); 2487 2488 netif_info(port, ifdown, dev, "disabling port\n"); 2489 2490 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2491 cancel_work_sync(&port->reset_task); 2492 cancel_delayed_work_sync(&port->stats_work); 2493 mutex_lock(&port->port_lock); 2494 netif_tx_stop_all_queues(dev); 2495 port_napi_disable(port); 2496 ret = ehea_down(dev); 2497 mutex_unlock(&port->port_lock); 2498 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2499 return ret; 2500 } 2501 2502 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2503 { 2504 struct ehea_qp qp = *orig_qp; 2505 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2506 struct ehea_swqe *swqe; 2507 int wqe_index; 2508 int i; 2509 2510 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2511 swqe = ehea_get_swqe(&qp, &wqe_index); 2512 swqe->tx_control |= EHEA_SWQE_PURGE; 2513 } 2514 } 2515 2516 static void ehea_flush_sq(struct ehea_port *port) 2517 { 2518 int i; 2519 2520 for (i = 0; i < port->num_def_qps; i++) { 2521 struct ehea_port_res *pr = &port->port_res[i]; 2522 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2523 int ret; 2524 2525 ret = wait_event_timeout(port->swqe_avail_wq, 2526 atomic_read(&pr->swqe_avail) >= swqe_max, 2527 msecs_to_jiffies(100)); 2528 2529 if (!ret) { 2530 pr_err("WARNING: sq not flushed completely\n"); 2531 break; 2532 } 2533 } 2534 } 2535 2536 static int ehea_stop_qps(struct net_device *dev) 2537 { 2538 struct ehea_port *port = netdev_priv(dev); 2539 struct ehea_adapter *adapter = port->adapter; 2540 struct hcp_modify_qp_cb0 *cb0; 2541 int ret = -EIO; 2542 int dret; 2543 int i; 2544 u64 hret; 2545 u64 dummy64 = 0; 2546 u16 dummy16 = 0; 2547 2548 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2549 if (!cb0) { 2550 ret = -ENOMEM; 2551 goto out; 2552 } 2553 2554 for (i = 0; i < (port->num_def_qps); i++) { 2555 struct ehea_port_res *pr = &port->port_res[i]; 2556 struct ehea_qp *qp = pr->qp; 2557 2558 /* Purge send queue */ 2559 ehea_purge_sq(qp); 2560 2561 /* Disable queue pair */ 2562 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2563 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2564 cb0); 2565 if (hret != H_SUCCESS) { 2566 pr_err("query_ehea_qp failed (1)\n"); 2567 goto out; 2568 } 2569 2570 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2571 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2572 2573 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2574 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2575 1), cb0, &dummy64, 2576 &dummy64, &dummy16, &dummy16); 2577 if (hret != H_SUCCESS) { 2578 pr_err("modify_ehea_qp failed (1)\n"); 2579 goto out; 2580 } 2581 2582 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2583 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2584 cb0); 2585 if (hret != H_SUCCESS) { 2586 pr_err("query_ehea_qp failed (2)\n"); 2587 goto out; 2588 } 2589 2590 /* deregister shared memory regions */ 2591 dret = ehea_rem_smrs(pr); 2592 if (dret) { 2593 pr_err("unreg shared memory region failed\n"); 2594 goto out; 2595 } 2596 } 2597 2598 ret = 0; 2599 out: 2600 free_page((unsigned long)cb0); 2601 2602 return ret; 2603 } 2604 2605 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2606 { 2607 struct ehea_qp qp = *orig_qp; 2608 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2609 struct ehea_rwqe *rwqe; 2610 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2611 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2612 struct sk_buff *skb; 2613 u32 lkey = pr->recv_mr.lkey; 2614 2615 2616 int i; 2617 int index; 2618 2619 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2620 rwqe = ehea_get_next_rwqe(&qp, 2); 2621 rwqe->sg_list[0].l_key = lkey; 2622 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2623 skb = skba_rq2[index]; 2624 if (skb) 2625 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2626 } 2627 2628 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2629 rwqe = ehea_get_next_rwqe(&qp, 3); 2630 rwqe->sg_list[0].l_key = lkey; 2631 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2632 skb = skba_rq3[index]; 2633 if (skb) 2634 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2635 } 2636 } 2637 2638 static int ehea_restart_qps(struct net_device *dev) 2639 { 2640 struct ehea_port *port = netdev_priv(dev); 2641 struct ehea_adapter *adapter = port->adapter; 2642 int ret = 0; 2643 int i; 2644 2645 struct hcp_modify_qp_cb0 *cb0; 2646 u64 hret; 2647 u64 dummy64 = 0; 2648 u16 dummy16 = 0; 2649 2650 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2651 if (!cb0) { 2652 ret = -ENOMEM; 2653 goto out; 2654 } 2655 2656 for (i = 0; i < (port->num_def_qps); i++) { 2657 struct ehea_port_res *pr = &port->port_res[i]; 2658 struct ehea_qp *qp = pr->qp; 2659 2660 ret = ehea_gen_smrs(pr); 2661 if (ret) { 2662 netdev_err(dev, "creation of shared memory regions failed\n"); 2663 goto out; 2664 } 2665 2666 ehea_update_rqs(qp, pr); 2667 2668 /* Enable queue pair */ 2669 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2670 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2671 cb0); 2672 if (hret != H_SUCCESS) { 2673 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2674 goto out; 2675 } 2676 2677 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2678 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2679 2680 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2681 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2682 1), cb0, &dummy64, 2683 &dummy64, &dummy16, &dummy16); 2684 if (hret != H_SUCCESS) { 2685 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2686 goto out; 2687 } 2688 2689 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2690 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2691 cb0); 2692 if (hret != H_SUCCESS) { 2693 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2694 goto out; 2695 } 2696 2697 /* refill entire queue */ 2698 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2699 ehea_refill_rq2(pr, 0); 2700 ehea_refill_rq3(pr, 0); 2701 } 2702 out: 2703 free_page((unsigned long)cb0); 2704 2705 return ret; 2706 } 2707 2708 static void ehea_reset_port(struct work_struct *work) 2709 { 2710 int ret; 2711 struct ehea_port *port = 2712 container_of(work, struct ehea_port, reset_task); 2713 struct net_device *dev = port->netdev; 2714 2715 mutex_lock(&dlpar_mem_lock); 2716 port->resets++; 2717 mutex_lock(&port->port_lock); 2718 netif_tx_disable(dev); 2719 2720 port_napi_disable(port); 2721 2722 ehea_down(dev); 2723 2724 ret = ehea_up(dev); 2725 if (ret) 2726 goto out; 2727 2728 ehea_set_multicast_list(dev); 2729 2730 netif_info(port, timer, dev, "reset successful\n"); 2731 2732 port_napi_enable(port); 2733 2734 netif_tx_wake_all_queues(dev); 2735 out: 2736 mutex_unlock(&port->port_lock); 2737 mutex_unlock(&dlpar_mem_lock); 2738 } 2739 2740 static void ehea_rereg_mrs(void) 2741 { 2742 int ret, i; 2743 struct ehea_adapter *adapter; 2744 2745 pr_info("LPAR memory changed - re-initializing driver\n"); 2746 2747 list_for_each_entry(adapter, &adapter_list, list) 2748 if (adapter->active_ports) { 2749 /* Shutdown all ports */ 2750 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2751 struct ehea_port *port = adapter->port[i]; 2752 struct net_device *dev; 2753 2754 if (!port) 2755 continue; 2756 2757 dev = port->netdev; 2758 2759 if (dev->flags & IFF_UP) { 2760 mutex_lock(&port->port_lock); 2761 netif_tx_disable(dev); 2762 ehea_flush_sq(port); 2763 ret = ehea_stop_qps(dev); 2764 if (ret) { 2765 mutex_unlock(&port->port_lock); 2766 goto out; 2767 } 2768 port_napi_disable(port); 2769 mutex_unlock(&port->port_lock); 2770 } 2771 reset_sq_restart_flag(port); 2772 } 2773 2774 /* Unregister old memory region */ 2775 ret = ehea_rem_mr(&adapter->mr); 2776 if (ret) { 2777 pr_err("unregister MR failed - driver inoperable!\n"); 2778 goto out; 2779 } 2780 } 2781 2782 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2783 2784 list_for_each_entry(adapter, &adapter_list, list) 2785 if (adapter->active_ports) { 2786 /* Register new memory region */ 2787 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2788 if (ret) { 2789 pr_err("register MR failed - driver inoperable!\n"); 2790 goto out; 2791 } 2792 2793 /* Restart all ports */ 2794 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2795 struct ehea_port *port = adapter->port[i]; 2796 2797 if (port) { 2798 struct net_device *dev = port->netdev; 2799 2800 if (dev->flags & IFF_UP) { 2801 mutex_lock(&port->port_lock); 2802 ret = ehea_restart_qps(dev); 2803 if (!ret) { 2804 check_sqs(port); 2805 port_napi_enable(port); 2806 netif_tx_wake_all_queues(dev); 2807 } else { 2808 netdev_err(dev, "Unable to restart QPS\n"); 2809 } 2810 mutex_unlock(&port->port_lock); 2811 } 2812 } 2813 } 2814 } 2815 pr_info("re-initializing driver complete\n"); 2816 out: 2817 return; 2818 } 2819 2820 static void ehea_tx_watchdog(struct net_device *dev) 2821 { 2822 struct ehea_port *port = netdev_priv(dev); 2823 2824 if (netif_carrier_ok(dev) && 2825 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2826 ehea_schedule_port_reset(port); 2827 } 2828 2829 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2830 { 2831 struct hcp_query_ehea *cb; 2832 u64 hret; 2833 int ret; 2834 2835 cb = (void *)get_zeroed_page(GFP_KERNEL); 2836 if (!cb) { 2837 ret = -ENOMEM; 2838 goto out; 2839 } 2840 2841 hret = ehea_h_query_ehea(adapter->handle, cb); 2842 2843 if (hret != H_SUCCESS) { 2844 ret = -EIO; 2845 goto out_herr; 2846 } 2847 2848 adapter->max_mc_mac = cb->max_mc_mac - 1; 2849 ret = 0; 2850 2851 out_herr: 2852 free_page((unsigned long)cb); 2853 out: 2854 return ret; 2855 } 2856 2857 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2858 { 2859 struct hcp_ehea_port_cb4 *cb4; 2860 u64 hret; 2861 int ret = 0; 2862 2863 *jumbo = 0; 2864 2865 /* (Try to) enable *jumbo frames */ 2866 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2867 if (!cb4) { 2868 pr_err("no mem for cb4\n"); 2869 ret = -ENOMEM; 2870 goto out; 2871 } else { 2872 hret = ehea_h_query_ehea_port(port->adapter->handle, 2873 port->logical_port_id, 2874 H_PORT_CB4, 2875 H_PORT_CB4_JUMBO, cb4); 2876 if (hret == H_SUCCESS) { 2877 if (cb4->jumbo_frame) 2878 *jumbo = 1; 2879 else { 2880 cb4->jumbo_frame = 1; 2881 hret = ehea_h_modify_ehea_port(port->adapter-> 2882 handle, 2883 port-> 2884 logical_port_id, 2885 H_PORT_CB4, 2886 H_PORT_CB4_JUMBO, 2887 cb4); 2888 if (hret == H_SUCCESS) 2889 *jumbo = 1; 2890 } 2891 } else 2892 ret = -EINVAL; 2893 2894 free_page((unsigned long)cb4); 2895 } 2896 out: 2897 return ret; 2898 } 2899 2900 static ssize_t ehea_show_port_id(struct device *dev, 2901 struct device_attribute *attr, char *buf) 2902 { 2903 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2904 return sprintf(buf, "%d", port->logical_port_id); 2905 } 2906 2907 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id, 2908 NULL); 2909 2910 static void logical_port_release(struct device *dev) 2911 { 2912 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2913 of_node_put(port->ofdev.dev.of_node); 2914 } 2915 2916 static struct device *ehea_register_port(struct ehea_port *port, 2917 struct device_node *dn) 2918 { 2919 int ret; 2920 2921 port->ofdev.dev.of_node = of_node_get(dn); 2922 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2923 port->ofdev.dev.bus = &ibmebus_bus_type; 2924 2925 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2926 port->ofdev.dev.release = logical_port_release; 2927 2928 ret = of_device_register(&port->ofdev); 2929 if (ret) { 2930 pr_err("failed to register device. ret=%d\n", ret); 2931 goto out; 2932 } 2933 2934 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2935 if (ret) { 2936 pr_err("failed to register attributes, ret=%d\n", ret); 2937 goto out_unreg_of_dev; 2938 } 2939 2940 return &port->ofdev.dev; 2941 2942 out_unreg_of_dev: 2943 of_device_unregister(&port->ofdev); 2944 out: 2945 return NULL; 2946 } 2947 2948 static void ehea_unregister_port(struct ehea_port *port) 2949 { 2950 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2951 of_device_unregister(&port->ofdev); 2952 } 2953 2954 static const struct net_device_ops ehea_netdev_ops = { 2955 .ndo_open = ehea_open, 2956 .ndo_stop = ehea_stop, 2957 .ndo_start_xmit = ehea_start_xmit, 2958 #ifdef CONFIG_NET_POLL_CONTROLLER 2959 .ndo_poll_controller = ehea_netpoll, 2960 #endif 2961 .ndo_get_stats64 = ehea_get_stats64, 2962 .ndo_set_mac_address = ehea_set_mac_addr, 2963 .ndo_validate_addr = eth_validate_addr, 2964 .ndo_set_rx_mode = ehea_set_multicast_list, 2965 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2966 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2967 .ndo_tx_timeout = ehea_tx_watchdog, 2968 }; 2969 2970 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2971 u32 logical_port_id, 2972 struct device_node *dn) 2973 { 2974 int ret; 2975 struct net_device *dev; 2976 struct ehea_port *port; 2977 struct device *port_dev; 2978 int jumbo; 2979 2980 /* allocate memory for the port structures */ 2981 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2982 2983 if (!dev) { 2984 ret = -ENOMEM; 2985 goto out_err; 2986 } 2987 2988 port = netdev_priv(dev); 2989 2990 mutex_init(&port->port_lock); 2991 port->state = EHEA_PORT_DOWN; 2992 port->sig_comp_iv = sq_entries / 10; 2993 2994 port->adapter = adapter; 2995 port->netdev = dev; 2996 port->logical_port_id = logical_port_id; 2997 2998 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 2999 3000 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 3001 if (!port->mc_list) { 3002 ret = -ENOMEM; 3003 goto out_free_ethdev; 3004 } 3005 3006 INIT_LIST_HEAD(&port->mc_list->list); 3007 3008 ret = ehea_sense_port_attr(port); 3009 if (ret) 3010 goto out_free_mc_list; 3011 3012 netif_set_real_num_rx_queues(dev, port->num_def_qps); 3013 netif_set_real_num_tx_queues(dev, port->num_def_qps); 3014 3015 port_dev = ehea_register_port(port, dn); 3016 if (!port_dev) 3017 goto out_free_mc_list; 3018 3019 SET_NETDEV_DEV(dev, port_dev); 3020 3021 /* initialize net_device structure */ 3022 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); 3023 3024 dev->netdev_ops = &ehea_netdev_ops; 3025 ehea_set_ethtool_ops(dev); 3026 3027 dev->hw_features = NETIF_F_SG | NETIF_F_TSO | 3028 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX; 3029 dev->features = NETIF_F_SG | NETIF_F_TSO | 3030 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | 3031 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 3032 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM; 3033 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3034 NETIF_F_IP_CSUM; 3035 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3036 3037 /* MTU range: 68 - 9022 */ 3038 dev->min_mtu = ETH_MIN_MTU; 3039 dev->max_mtu = EHEA_MAX_PACKET_SIZE; 3040 3041 INIT_WORK(&port->reset_task, ehea_reset_port); 3042 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3043 3044 init_waitqueue_head(&port->swqe_avail_wq); 3045 init_waitqueue_head(&port->restart_wq); 3046 3047 ret = register_netdev(dev); 3048 if (ret) { 3049 pr_err("register_netdev failed. ret=%d\n", ret); 3050 goto out_unreg_port; 3051 } 3052 3053 ret = ehea_get_jumboframe_status(port, &jumbo); 3054 if (ret) 3055 netdev_err(dev, "failed determining jumbo frame status\n"); 3056 3057 netdev_info(dev, "Jumbo frames are %sabled\n", 3058 jumbo == 1 ? "en" : "dis"); 3059 3060 adapter->active_ports++; 3061 3062 return port; 3063 3064 out_unreg_port: 3065 ehea_unregister_port(port); 3066 3067 out_free_mc_list: 3068 kfree(port->mc_list); 3069 3070 out_free_ethdev: 3071 free_netdev(dev); 3072 3073 out_err: 3074 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3075 logical_port_id, ret); 3076 return NULL; 3077 } 3078 3079 static void ehea_shutdown_single_port(struct ehea_port *port) 3080 { 3081 struct ehea_adapter *adapter = port->adapter; 3082 3083 cancel_work_sync(&port->reset_task); 3084 cancel_delayed_work_sync(&port->stats_work); 3085 unregister_netdev(port->netdev); 3086 ehea_unregister_port(port); 3087 kfree(port->mc_list); 3088 free_netdev(port->netdev); 3089 adapter->active_ports--; 3090 } 3091 3092 static int ehea_setup_ports(struct ehea_adapter *adapter) 3093 { 3094 struct device_node *lhea_dn; 3095 struct device_node *eth_dn = NULL; 3096 3097 const u32 *dn_log_port_id; 3098 int i = 0; 3099 3100 lhea_dn = adapter->ofdev->dev.of_node; 3101 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3102 3103 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3104 NULL); 3105 if (!dn_log_port_id) { 3106 pr_err("bad device node: eth_dn name=%s\n", 3107 eth_dn->full_name); 3108 continue; 3109 } 3110 3111 if (ehea_add_adapter_mr(adapter)) { 3112 pr_err("creating MR failed\n"); 3113 of_node_put(eth_dn); 3114 return -EIO; 3115 } 3116 3117 adapter->port[i] = ehea_setup_single_port(adapter, 3118 *dn_log_port_id, 3119 eth_dn); 3120 if (adapter->port[i]) 3121 netdev_info(adapter->port[i]->netdev, 3122 "logical port id #%d\n", *dn_log_port_id); 3123 else 3124 ehea_remove_adapter_mr(adapter); 3125 3126 i++; 3127 } 3128 return 0; 3129 } 3130 3131 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3132 u32 logical_port_id) 3133 { 3134 struct device_node *lhea_dn; 3135 struct device_node *eth_dn = NULL; 3136 const u32 *dn_log_port_id; 3137 3138 lhea_dn = adapter->ofdev->dev.of_node; 3139 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3140 3141 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3142 NULL); 3143 if (dn_log_port_id) 3144 if (*dn_log_port_id == logical_port_id) 3145 return eth_dn; 3146 } 3147 3148 return NULL; 3149 } 3150 3151 static ssize_t ehea_probe_port(struct device *dev, 3152 struct device_attribute *attr, 3153 const char *buf, size_t count) 3154 { 3155 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3156 struct ehea_port *port; 3157 struct device_node *eth_dn = NULL; 3158 int i; 3159 3160 u32 logical_port_id; 3161 3162 sscanf(buf, "%d", &logical_port_id); 3163 3164 port = ehea_get_port(adapter, logical_port_id); 3165 3166 if (port) { 3167 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3168 logical_port_id); 3169 return -EINVAL; 3170 } 3171 3172 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3173 3174 if (!eth_dn) { 3175 pr_info("no logical port with id %d found\n", logical_port_id); 3176 return -EINVAL; 3177 } 3178 3179 if (ehea_add_adapter_mr(adapter)) { 3180 pr_err("creating MR failed\n"); 3181 return -EIO; 3182 } 3183 3184 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3185 3186 of_node_put(eth_dn); 3187 3188 if (port) { 3189 for (i = 0; i < EHEA_MAX_PORTS; i++) 3190 if (!adapter->port[i]) { 3191 adapter->port[i] = port; 3192 break; 3193 } 3194 3195 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3196 logical_port_id); 3197 } else { 3198 ehea_remove_adapter_mr(adapter); 3199 return -EIO; 3200 } 3201 3202 return (ssize_t) count; 3203 } 3204 3205 static ssize_t ehea_remove_port(struct device *dev, 3206 struct device_attribute *attr, 3207 const char *buf, size_t count) 3208 { 3209 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3210 struct ehea_port *port; 3211 int i; 3212 u32 logical_port_id; 3213 3214 sscanf(buf, "%d", &logical_port_id); 3215 3216 port = ehea_get_port(adapter, logical_port_id); 3217 3218 if (port) { 3219 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3220 logical_port_id); 3221 3222 ehea_shutdown_single_port(port); 3223 3224 for (i = 0; i < EHEA_MAX_PORTS; i++) 3225 if (adapter->port[i] == port) { 3226 adapter->port[i] = NULL; 3227 break; 3228 } 3229 } else { 3230 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3231 logical_port_id); 3232 return -EINVAL; 3233 } 3234 3235 ehea_remove_adapter_mr(adapter); 3236 3237 return (ssize_t) count; 3238 } 3239 3240 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port); 3241 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port); 3242 3243 static int ehea_create_device_sysfs(struct platform_device *dev) 3244 { 3245 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3246 if (ret) 3247 goto out; 3248 3249 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3250 out: 3251 return ret; 3252 } 3253 3254 static void ehea_remove_device_sysfs(struct platform_device *dev) 3255 { 3256 device_remove_file(&dev->dev, &dev_attr_probe_port); 3257 device_remove_file(&dev->dev, &dev_attr_remove_port); 3258 } 3259 3260 static int ehea_reboot_notifier(struct notifier_block *nb, 3261 unsigned long action, void *unused) 3262 { 3263 if (action == SYS_RESTART) { 3264 pr_info("Reboot: freeing all eHEA resources\n"); 3265 ibmebus_unregister_driver(&ehea_driver); 3266 } 3267 return NOTIFY_DONE; 3268 } 3269 3270 static struct notifier_block ehea_reboot_nb = { 3271 .notifier_call = ehea_reboot_notifier, 3272 }; 3273 3274 static int ehea_mem_notifier(struct notifier_block *nb, 3275 unsigned long action, void *data) 3276 { 3277 int ret = NOTIFY_BAD; 3278 struct memory_notify *arg = data; 3279 3280 mutex_lock(&dlpar_mem_lock); 3281 3282 switch (action) { 3283 case MEM_CANCEL_OFFLINE: 3284 pr_info("memory offlining canceled"); 3285 /* Fall through: re-add canceled memory block */ 3286 3287 case MEM_ONLINE: 3288 pr_info("memory is going online"); 3289 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3290 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3291 goto out_unlock; 3292 ehea_rereg_mrs(); 3293 break; 3294 3295 case MEM_GOING_OFFLINE: 3296 pr_info("memory is going offline"); 3297 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3298 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3299 goto out_unlock; 3300 ehea_rereg_mrs(); 3301 break; 3302 3303 default: 3304 break; 3305 } 3306 3307 ehea_update_firmware_handles(); 3308 ret = NOTIFY_OK; 3309 3310 out_unlock: 3311 mutex_unlock(&dlpar_mem_lock); 3312 return ret; 3313 } 3314 3315 static struct notifier_block ehea_mem_nb = { 3316 .notifier_call = ehea_mem_notifier, 3317 }; 3318 3319 static void ehea_crash_handler(void) 3320 { 3321 int i; 3322 3323 if (ehea_fw_handles.arr) 3324 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3325 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3326 ehea_fw_handles.arr[i].fwh, 3327 FORCE_FREE); 3328 3329 if (ehea_bcmc_regs.arr) 3330 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3331 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3332 ehea_bcmc_regs.arr[i].port_id, 3333 ehea_bcmc_regs.arr[i].reg_type, 3334 ehea_bcmc_regs.arr[i].macaddr, 3335 0, H_DEREG_BCMC); 3336 } 3337 3338 static atomic_t ehea_memory_hooks_registered; 3339 3340 /* Register memory hooks on probe of first adapter */ 3341 static int ehea_register_memory_hooks(void) 3342 { 3343 int ret = 0; 3344 3345 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1) 3346 return 0; 3347 3348 ret = ehea_create_busmap(); 3349 if (ret) { 3350 pr_info("ehea_create_busmap failed\n"); 3351 goto out; 3352 } 3353 3354 ret = register_reboot_notifier(&ehea_reboot_nb); 3355 if (ret) { 3356 pr_info("register_reboot_notifier failed\n"); 3357 goto out; 3358 } 3359 3360 ret = register_memory_notifier(&ehea_mem_nb); 3361 if (ret) { 3362 pr_info("register_memory_notifier failed\n"); 3363 goto out2; 3364 } 3365 3366 ret = crash_shutdown_register(ehea_crash_handler); 3367 if (ret) { 3368 pr_info("crash_shutdown_register failed\n"); 3369 goto out3; 3370 } 3371 3372 return 0; 3373 3374 out3: 3375 unregister_memory_notifier(&ehea_mem_nb); 3376 out2: 3377 unregister_reboot_notifier(&ehea_reboot_nb); 3378 out: 3379 atomic_dec(&ehea_memory_hooks_registered); 3380 return ret; 3381 } 3382 3383 static void ehea_unregister_memory_hooks(void) 3384 { 3385 /* Only remove the hooks if we've registered them */ 3386 if (atomic_read(&ehea_memory_hooks_registered) == 0) 3387 return; 3388 3389 unregister_reboot_notifier(&ehea_reboot_nb); 3390 if (crash_shutdown_unregister(ehea_crash_handler)) 3391 pr_info("failed unregistering crash handler\n"); 3392 unregister_memory_notifier(&ehea_mem_nb); 3393 } 3394 3395 static int ehea_probe_adapter(struct platform_device *dev) 3396 { 3397 struct ehea_adapter *adapter; 3398 const u64 *adapter_handle; 3399 int ret; 3400 int i; 3401 3402 ret = ehea_register_memory_hooks(); 3403 if (ret) 3404 return ret; 3405 3406 if (!dev || !dev->dev.of_node) { 3407 pr_err("Invalid ibmebus device probed\n"); 3408 return -EINVAL; 3409 } 3410 3411 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL); 3412 if (!adapter) { 3413 ret = -ENOMEM; 3414 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3415 goto out; 3416 } 3417 3418 list_add(&adapter->list, &adapter_list); 3419 3420 adapter->ofdev = dev; 3421 3422 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3423 NULL); 3424 if (adapter_handle) 3425 adapter->handle = *adapter_handle; 3426 3427 if (!adapter->handle) { 3428 dev_err(&dev->dev, "failed getting handle for adapter" 3429 " '%s'\n", dev->dev.of_node->full_name); 3430 ret = -ENODEV; 3431 goto out_free_ad; 3432 } 3433 3434 adapter->pd = EHEA_PD_ID; 3435 3436 platform_set_drvdata(dev, adapter); 3437 3438 3439 /* initialize adapter and ports */ 3440 /* get adapter properties */ 3441 ret = ehea_sense_adapter_attr(adapter); 3442 if (ret) { 3443 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3444 goto out_free_ad; 3445 } 3446 3447 adapter->neq = ehea_create_eq(adapter, 3448 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3449 if (!adapter->neq) { 3450 ret = -EIO; 3451 dev_err(&dev->dev, "NEQ creation failed\n"); 3452 goto out_free_ad; 3453 } 3454 3455 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, 3456 (unsigned long)adapter); 3457 3458 ret = ehea_create_device_sysfs(dev); 3459 if (ret) 3460 goto out_kill_eq; 3461 3462 ret = ehea_setup_ports(adapter); 3463 if (ret) { 3464 dev_err(&dev->dev, "setup_ports failed\n"); 3465 goto out_rem_dev_sysfs; 3466 } 3467 3468 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3469 ehea_interrupt_neq, 0, 3470 "ehea_neq", adapter); 3471 if (ret) { 3472 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3473 goto out_shutdown_ports; 3474 } 3475 3476 /* Handle any events that might be pending. */ 3477 tasklet_hi_schedule(&adapter->neq_tasklet); 3478 3479 ret = 0; 3480 goto out; 3481 3482 out_shutdown_ports: 3483 for (i = 0; i < EHEA_MAX_PORTS; i++) 3484 if (adapter->port[i]) { 3485 ehea_shutdown_single_port(adapter->port[i]); 3486 adapter->port[i] = NULL; 3487 } 3488 3489 out_rem_dev_sysfs: 3490 ehea_remove_device_sysfs(dev); 3491 3492 out_kill_eq: 3493 ehea_destroy_eq(adapter->neq); 3494 3495 out_free_ad: 3496 list_del(&adapter->list); 3497 3498 out: 3499 ehea_update_firmware_handles(); 3500 3501 return ret; 3502 } 3503 3504 static int ehea_remove(struct platform_device *dev) 3505 { 3506 struct ehea_adapter *adapter = platform_get_drvdata(dev); 3507 int i; 3508 3509 for (i = 0; i < EHEA_MAX_PORTS; i++) 3510 if (adapter->port[i]) { 3511 ehea_shutdown_single_port(adapter->port[i]); 3512 adapter->port[i] = NULL; 3513 } 3514 3515 ehea_remove_device_sysfs(dev); 3516 3517 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3518 tasklet_kill(&adapter->neq_tasklet); 3519 3520 ehea_destroy_eq(adapter->neq); 3521 ehea_remove_adapter_mr(adapter); 3522 list_del(&adapter->list); 3523 3524 ehea_update_firmware_handles(); 3525 3526 return 0; 3527 } 3528 3529 static int check_module_parm(void) 3530 { 3531 int ret = 0; 3532 3533 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3534 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3535 pr_info("Bad parameter: rq1_entries\n"); 3536 ret = -EINVAL; 3537 } 3538 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3539 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3540 pr_info("Bad parameter: rq2_entries\n"); 3541 ret = -EINVAL; 3542 } 3543 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3544 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3545 pr_info("Bad parameter: rq3_entries\n"); 3546 ret = -EINVAL; 3547 } 3548 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3549 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3550 pr_info("Bad parameter: sq_entries\n"); 3551 ret = -EINVAL; 3552 } 3553 3554 return ret; 3555 } 3556 3557 static ssize_t ehea_show_capabilities(struct device_driver *drv, 3558 char *buf) 3559 { 3560 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3561 } 3562 3563 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH, 3564 ehea_show_capabilities, NULL); 3565 3566 static int __init ehea_module_init(void) 3567 { 3568 int ret; 3569 3570 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3571 3572 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3573 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3574 3575 mutex_init(&ehea_fw_handles.lock); 3576 spin_lock_init(&ehea_bcmc_regs.lock); 3577 3578 ret = check_module_parm(); 3579 if (ret) 3580 goto out; 3581 3582 ret = ibmebus_register_driver(&ehea_driver); 3583 if (ret) { 3584 pr_err("failed registering eHEA device driver on ebus\n"); 3585 goto out; 3586 } 3587 3588 ret = driver_create_file(&ehea_driver.driver, 3589 &driver_attr_capabilities); 3590 if (ret) { 3591 pr_err("failed to register capabilities attribute, ret=%d\n", 3592 ret); 3593 goto out2; 3594 } 3595 3596 return ret; 3597 3598 out2: 3599 ibmebus_unregister_driver(&ehea_driver); 3600 out: 3601 return ret; 3602 } 3603 3604 static void __exit ehea_module_exit(void) 3605 { 3606 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3607 ibmebus_unregister_driver(&ehea_driver); 3608 ehea_unregister_memory_hooks(); 3609 kfree(ehea_fw_handles.arr); 3610 kfree(ehea_bcmc_regs.arr); 3611 ehea_destroy_busmap(); 3612 } 3613 3614 module_init(ehea_module_init); 3615 module_exit(ehea_module_exit); 3616