1 /* 2 * linux/drivers/net/ethernet/ibm/ehea/ehea_main.c 3 * 4 * eHEA ethernet device driver for IBM eServer System p 5 * 6 * (C) Copyright IBM Corp. 2006 7 * 8 * Authors: 9 * Christoph Raisch <raisch@de.ibm.com> 10 * Jan-Bernd Themann <themann@de.ibm.com> 11 * Thomas Klein <tklein@de.ibm.com> 12 * 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2, or (at your option) 17 * any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 27 */ 28 29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 30 31 #include <linux/device.h> 32 #include <linux/in.h> 33 #include <linux/ip.h> 34 #include <linux/tcp.h> 35 #include <linux/udp.h> 36 #include <linux/if.h> 37 #include <linux/list.h> 38 #include <linux/slab.h> 39 #include <linux/if_ether.h> 40 #include <linux/notifier.h> 41 #include <linux/reboot.h> 42 #include <linux/memory.h> 43 #include <asm/kexec.h> 44 #include <linux/mutex.h> 45 #include <linux/prefetch.h> 46 47 #include <net/ip.h> 48 49 #include "ehea.h" 50 #include "ehea_qmr.h" 51 #include "ehea_phyp.h" 52 53 54 MODULE_LICENSE("GPL"); 55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>"); 56 MODULE_DESCRIPTION("IBM eServer HEA Driver"); 57 MODULE_VERSION(DRV_VERSION); 58 59 60 static int msg_level = -1; 61 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1; 62 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2; 63 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3; 64 static int sq_entries = EHEA_DEF_ENTRIES_SQ; 65 static int use_mcs = 1; 66 static int prop_carrier_state; 67 68 module_param(msg_level, int, 0); 69 module_param(rq1_entries, int, 0); 70 module_param(rq2_entries, int, 0); 71 module_param(rq3_entries, int, 0); 72 module_param(sq_entries, int, 0); 73 module_param(prop_carrier_state, int, 0); 74 module_param(use_mcs, int, 0); 75 76 MODULE_PARM_DESC(msg_level, "msg_level"); 77 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical " 78 "port to stack. 1:yes, 0:no. Default = 0 "); 79 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 " 80 "[2^x - 1], x = [7..14]. Default = " 81 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")"); 82 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 " 83 "[2^x - 1], x = [7..14]. Default = " 84 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")"); 85 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 " 86 "[2^x - 1], x = [7..14]. Default = " 87 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")"); 88 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue " 89 "[2^x - 1], x = [7..14]. Default = " 90 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); 91 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, " 92 "Default = 1"); 93 94 static int port_name_cnt; 95 static LIST_HEAD(adapter_list); 96 static unsigned long ehea_driver_flags; 97 static DEFINE_MUTEX(dlpar_mem_lock); 98 static struct ehea_fw_handle_array ehea_fw_handles; 99 static struct ehea_bcmc_reg_array ehea_bcmc_regs; 100 101 102 static int ehea_probe_adapter(struct platform_device *dev); 103 104 static int ehea_remove(struct platform_device *dev); 105 106 static const struct of_device_id ehea_module_device_table[] = { 107 { 108 .name = "lhea", 109 .compatible = "IBM,lhea", 110 }, 111 { 112 .type = "network", 113 .compatible = "IBM,lhea-ethernet", 114 }, 115 {}, 116 }; 117 MODULE_DEVICE_TABLE(of, ehea_module_device_table); 118 119 static const struct of_device_id ehea_device_table[] = { 120 { 121 .name = "lhea", 122 .compatible = "IBM,lhea", 123 }, 124 {}, 125 }; 126 127 static struct platform_driver ehea_driver = { 128 .driver = { 129 .name = "ehea", 130 .owner = THIS_MODULE, 131 .of_match_table = ehea_device_table, 132 }, 133 .probe = ehea_probe_adapter, 134 .remove = ehea_remove, 135 }; 136 137 void ehea_dump(void *adr, int len, char *msg) 138 { 139 int x; 140 unsigned char *deb = adr; 141 for (x = 0; x < len; x += 16) { 142 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n", 143 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8])); 144 deb += 16; 145 } 146 } 147 148 static void ehea_schedule_port_reset(struct ehea_port *port) 149 { 150 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags)) 151 schedule_work(&port->reset_task); 152 } 153 154 static void ehea_update_firmware_handles(void) 155 { 156 struct ehea_fw_handle_entry *arr = NULL; 157 struct ehea_adapter *adapter; 158 int num_adapters = 0; 159 int num_ports = 0; 160 int num_portres = 0; 161 int i = 0; 162 int num_fw_handles, k, l; 163 164 /* Determine number of handles */ 165 mutex_lock(&ehea_fw_handles.lock); 166 167 list_for_each_entry(adapter, &adapter_list, list) { 168 num_adapters++; 169 170 for (k = 0; k < EHEA_MAX_PORTS; k++) { 171 struct ehea_port *port = adapter->port[k]; 172 173 if (!port || (port->state != EHEA_PORT_UP)) 174 continue; 175 176 num_ports++; 177 num_portres += port->num_def_qps; 178 } 179 } 180 181 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES + 182 num_ports * EHEA_NUM_PORT_FW_HANDLES + 183 num_portres * EHEA_NUM_PORTRES_FW_HANDLES; 184 185 if (num_fw_handles) { 186 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL); 187 if (!arr) 188 goto out; /* Keep the existing array */ 189 } else 190 goto out_update; 191 192 list_for_each_entry(adapter, &adapter_list, list) { 193 if (num_adapters == 0) 194 break; 195 196 for (k = 0; k < EHEA_MAX_PORTS; k++) { 197 struct ehea_port *port = adapter->port[k]; 198 199 if (!port || (port->state != EHEA_PORT_UP) || 200 (num_ports == 0)) 201 continue; 202 203 for (l = 0; l < port->num_def_qps; l++) { 204 struct ehea_port_res *pr = &port->port_res[l]; 205 206 arr[i].adh = adapter->handle; 207 arr[i++].fwh = pr->qp->fw_handle; 208 arr[i].adh = adapter->handle; 209 arr[i++].fwh = pr->send_cq->fw_handle; 210 arr[i].adh = adapter->handle; 211 arr[i++].fwh = pr->recv_cq->fw_handle; 212 arr[i].adh = adapter->handle; 213 arr[i++].fwh = pr->eq->fw_handle; 214 arr[i].adh = adapter->handle; 215 arr[i++].fwh = pr->send_mr.handle; 216 arr[i].adh = adapter->handle; 217 arr[i++].fwh = pr->recv_mr.handle; 218 } 219 arr[i].adh = adapter->handle; 220 arr[i++].fwh = port->qp_eq->fw_handle; 221 num_ports--; 222 } 223 224 arr[i].adh = adapter->handle; 225 arr[i++].fwh = adapter->neq->fw_handle; 226 227 if (adapter->mr.handle) { 228 arr[i].adh = adapter->handle; 229 arr[i++].fwh = adapter->mr.handle; 230 } 231 num_adapters--; 232 } 233 234 out_update: 235 kfree(ehea_fw_handles.arr); 236 ehea_fw_handles.arr = arr; 237 ehea_fw_handles.num_entries = i; 238 out: 239 mutex_unlock(&ehea_fw_handles.lock); 240 } 241 242 static void ehea_update_bcmc_registrations(void) 243 { 244 unsigned long flags; 245 struct ehea_bcmc_reg_entry *arr = NULL; 246 struct ehea_adapter *adapter; 247 struct ehea_mc_list *mc_entry; 248 int num_registrations = 0; 249 int i = 0; 250 int k; 251 252 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags); 253 254 /* Determine number of registrations */ 255 list_for_each_entry(adapter, &adapter_list, list) 256 for (k = 0; k < EHEA_MAX_PORTS; k++) { 257 struct ehea_port *port = adapter->port[k]; 258 259 if (!port || (port->state != EHEA_PORT_UP)) 260 continue; 261 262 num_registrations += 2; /* Broadcast registrations */ 263 264 list_for_each_entry(mc_entry, &port->mc_list->list,list) 265 num_registrations += 2; 266 } 267 268 if (num_registrations) { 269 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC); 270 if (!arr) 271 goto out; /* Keep the existing array */ 272 } else 273 goto out_update; 274 275 list_for_each_entry(adapter, &adapter_list, list) { 276 for (k = 0; k < EHEA_MAX_PORTS; k++) { 277 struct ehea_port *port = adapter->port[k]; 278 279 if (!port || (port->state != EHEA_PORT_UP)) 280 continue; 281 282 if (num_registrations == 0) 283 goto out_update; 284 285 arr[i].adh = adapter->handle; 286 arr[i].port_id = port->logical_port_id; 287 arr[i].reg_type = EHEA_BCMC_BROADCAST | 288 EHEA_BCMC_UNTAGGED; 289 arr[i++].macaddr = port->mac_addr; 290 291 arr[i].adh = adapter->handle; 292 arr[i].port_id = port->logical_port_id; 293 arr[i].reg_type = EHEA_BCMC_BROADCAST | 294 EHEA_BCMC_VLANID_ALL; 295 arr[i++].macaddr = port->mac_addr; 296 num_registrations -= 2; 297 298 list_for_each_entry(mc_entry, 299 &port->mc_list->list, list) { 300 if (num_registrations == 0) 301 goto out_update; 302 303 arr[i].adh = adapter->handle; 304 arr[i].port_id = port->logical_port_id; 305 arr[i].reg_type = EHEA_BCMC_MULTICAST | 306 EHEA_BCMC_UNTAGGED; 307 if (mc_entry->macaddr == 0) 308 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 309 arr[i++].macaddr = mc_entry->macaddr; 310 311 arr[i].adh = adapter->handle; 312 arr[i].port_id = port->logical_port_id; 313 arr[i].reg_type = EHEA_BCMC_MULTICAST | 314 EHEA_BCMC_VLANID_ALL; 315 if (mc_entry->macaddr == 0) 316 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 317 arr[i++].macaddr = mc_entry->macaddr; 318 num_registrations -= 2; 319 } 320 } 321 } 322 323 out_update: 324 kfree(ehea_bcmc_regs.arr); 325 ehea_bcmc_regs.arr = arr; 326 ehea_bcmc_regs.num_entries = i; 327 out: 328 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags); 329 } 330 331 static void ehea_get_stats64(struct net_device *dev, 332 struct rtnl_link_stats64 *stats) 333 { 334 struct ehea_port *port = netdev_priv(dev); 335 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0; 336 int i; 337 338 for (i = 0; i < port->num_def_qps; i++) { 339 rx_packets += port->port_res[i].rx_packets; 340 rx_bytes += port->port_res[i].rx_bytes; 341 } 342 343 for (i = 0; i < port->num_def_qps; i++) { 344 tx_packets += port->port_res[i].tx_packets; 345 tx_bytes += port->port_res[i].tx_bytes; 346 } 347 348 stats->tx_packets = tx_packets; 349 stats->rx_bytes = rx_bytes; 350 stats->tx_bytes = tx_bytes; 351 stats->rx_packets = rx_packets; 352 353 stats->multicast = port->stats.multicast; 354 stats->rx_errors = port->stats.rx_errors; 355 } 356 357 static void ehea_update_stats(struct work_struct *work) 358 { 359 struct ehea_port *port = 360 container_of(work, struct ehea_port, stats_work.work); 361 struct net_device *dev = port->netdev; 362 struct rtnl_link_stats64 *stats = &port->stats; 363 struct hcp_ehea_port_cb2 *cb2; 364 u64 hret; 365 366 cb2 = (void *)get_zeroed_page(GFP_KERNEL); 367 if (!cb2) { 368 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n"); 369 goto resched; 370 } 371 372 hret = ehea_h_query_ehea_port(port->adapter->handle, 373 port->logical_port_id, 374 H_PORT_CB2, H_PORT_CB2_ALL, cb2); 375 if (hret != H_SUCCESS) { 376 netdev_err(dev, "query_ehea_port failed\n"); 377 goto out_herr; 378 } 379 380 if (netif_msg_hw(port)) 381 ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); 382 383 stats->multicast = cb2->rxmcp; 384 stats->rx_errors = cb2->rxuerr; 385 386 out_herr: 387 free_page((unsigned long)cb2); 388 resched: 389 schedule_delayed_work(&port->stats_work, 390 round_jiffies_relative(msecs_to_jiffies(1000))); 391 } 392 393 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) 394 { 395 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 396 struct net_device *dev = pr->port->netdev; 397 int max_index_mask = pr->rq1_skba.len - 1; 398 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; 399 int adder = 0; 400 int i; 401 402 pr->rq1_skba.os_skbs = 0; 403 404 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 405 if (nr_of_wqes > 0) 406 pr->rq1_skba.index = index; 407 pr->rq1_skba.os_skbs = fill_wqes; 408 return; 409 } 410 411 for (i = 0; i < fill_wqes; i++) { 412 if (!skb_arr_rq1[index]) { 413 skb_arr_rq1[index] = netdev_alloc_skb(dev, 414 EHEA_L_PKT_SIZE); 415 if (!skb_arr_rq1[index]) { 416 pr->rq1_skba.os_skbs = fill_wqes - i; 417 break; 418 } 419 } 420 index--; 421 index &= max_index_mask; 422 adder++; 423 } 424 425 if (adder == 0) 426 return; 427 428 /* Ring doorbell */ 429 ehea_update_rq1a(pr->qp, adder); 430 } 431 432 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) 433 { 434 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 435 struct net_device *dev = pr->port->netdev; 436 int i; 437 438 if (nr_rq1a > pr->rq1_skba.len) { 439 netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); 440 return; 441 } 442 443 for (i = 0; i < nr_rq1a; i++) { 444 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); 445 if (!skb_arr_rq1[i]) 446 break; 447 } 448 /* Ring doorbell */ 449 ehea_update_rq1a(pr->qp, i - 1); 450 } 451 452 static int ehea_refill_rq_def(struct ehea_port_res *pr, 453 struct ehea_q_skb_arr *q_skba, int rq_nr, 454 int num_wqes, int wqe_type, int packet_size) 455 { 456 struct net_device *dev = pr->port->netdev; 457 struct ehea_qp *qp = pr->qp; 458 struct sk_buff **skb_arr = q_skba->arr; 459 struct ehea_rwqe *rwqe; 460 int i, index, max_index_mask, fill_wqes; 461 int adder = 0; 462 int ret = 0; 463 464 fill_wqes = q_skba->os_skbs + num_wqes; 465 q_skba->os_skbs = 0; 466 467 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 468 q_skba->os_skbs = fill_wqes; 469 return ret; 470 } 471 472 index = q_skba->index; 473 max_index_mask = q_skba->len - 1; 474 for (i = 0; i < fill_wqes; i++) { 475 u64 tmp_addr; 476 struct sk_buff *skb; 477 478 skb = netdev_alloc_skb_ip_align(dev, packet_size); 479 if (!skb) { 480 q_skba->os_skbs = fill_wqes - i; 481 if (q_skba->os_skbs == q_skba->len - 2) { 482 netdev_info(pr->port->netdev, 483 "rq%i ran dry - no mem for skb\n", 484 rq_nr); 485 ret = -ENOMEM; 486 } 487 break; 488 } 489 490 skb_arr[index] = skb; 491 tmp_addr = ehea_map_vaddr(skb->data); 492 if (tmp_addr == -1) { 493 dev_consume_skb_any(skb); 494 q_skba->os_skbs = fill_wqes - i; 495 ret = 0; 496 break; 497 } 498 499 rwqe = ehea_get_next_rwqe(qp, rq_nr); 500 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type) 501 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index); 502 rwqe->sg_list[0].l_key = pr->recv_mr.lkey; 503 rwqe->sg_list[0].vaddr = tmp_addr; 504 rwqe->sg_list[0].len = packet_size; 505 rwqe->data_segments = 1; 506 507 index++; 508 index &= max_index_mask; 509 adder++; 510 } 511 512 q_skba->index = index; 513 if (adder == 0) 514 goto out; 515 516 /* Ring doorbell */ 517 iosync(); 518 if (rq_nr == 2) 519 ehea_update_rq2a(pr->qp, adder); 520 else 521 ehea_update_rq3a(pr->qp, adder); 522 out: 523 return ret; 524 } 525 526 527 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) 528 { 529 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, 530 nr_of_wqes, EHEA_RWQE2_TYPE, 531 EHEA_RQ2_PKT_SIZE); 532 } 533 534 535 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) 536 { 537 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, 538 nr_of_wqes, EHEA_RWQE3_TYPE, 539 EHEA_MAX_PACKET_SIZE); 540 } 541 542 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) 543 { 544 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; 545 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) 546 return 0; 547 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && 548 (cqe->header_length == 0)) 549 return 0; 550 return -EINVAL; 551 } 552 553 static inline void ehea_fill_skb(struct net_device *dev, 554 struct sk_buff *skb, struct ehea_cqe *cqe, 555 struct ehea_port_res *pr) 556 { 557 int length = cqe->num_bytes_transfered - 4; /*remove CRC */ 558 559 skb_put(skb, length); 560 skb->protocol = eth_type_trans(skb, dev); 561 562 /* The packet was not an IPV4 packet so a complemented checksum was 563 calculated. The value is found in the Internet Checksum field. */ 564 if (cqe->status & EHEA_CQE_BLIND_CKSUM) { 565 skb->ip_summed = CHECKSUM_COMPLETE; 566 skb->csum = csum_unfold(~cqe->inet_checksum_value); 567 } else 568 skb->ip_summed = CHECKSUM_UNNECESSARY; 569 570 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]); 571 } 572 573 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, 574 int arr_len, 575 struct ehea_cqe *cqe) 576 { 577 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 578 struct sk_buff *skb; 579 void *pref; 580 int x; 581 582 x = skb_index + 1; 583 x &= (arr_len - 1); 584 585 pref = skb_array[x]; 586 if (pref) { 587 prefetchw(pref); 588 prefetchw(pref + EHEA_CACHE_LINE); 589 590 pref = (skb_array[x]->data); 591 prefetch(pref); 592 prefetch(pref + EHEA_CACHE_LINE); 593 prefetch(pref + EHEA_CACHE_LINE * 2); 594 prefetch(pref + EHEA_CACHE_LINE * 3); 595 } 596 597 skb = skb_array[skb_index]; 598 skb_array[skb_index] = NULL; 599 return skb; 600 } 601 602 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, 603 int arr_len, int wqe_index) 604 { 605 struct sk_buff *skb; 606 void *pref; 607 int x; 608 609 x = wqe_index + 1; 610 x &= (arr_len - 1); 611 612 pref = skb_array[x]; 613 if (pref) { 614 prefetchw(pref); 615 prefetchw(pref + EHEA_CACHE_LINE); 616 617 pref = (skb_array[x]->data); 618 prefetchw(pref); 619 prefetchw(pref + EHEA_CACHE_LINE); 620 } 621 622 skb = skb_array[wqe_index]; 623 skb_array[wqe_index] = NULL; 624 return skb; 625 } 626 627 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, 628 struct ehea_cqe *cqe, int *processed_rq2, 629 int *processed_rq3) 630 { 631 struct sk_buff *skb; 632 633 if (cqe->status & EHEA_CQE_STAT_ERR_TCP) 634 pr->p_stats.err_tcp_cksum++; 635 if (cqe->status & EHEA_CQE_STAT_ERR_IP) 636 pr->p_stats.err_ip_cksum++; 637 if (cqe->status & EHEA_CQE_STAT_ERR_CRC) 638 pr->p_stats.err_frame_crc++; 639 640 if (rq == 2) { 641 *processed_rq2 += 1; 642 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe); 643 dev_kfree_skb(skb); 644 } else if (rq == 3) { 645 *processed_rq3 += 1; 646 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe); 647 dev_kfree_skb(skb); 648 } 649 650 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) { 651 if (netif_msg_rx_err(pr->port)) { 652 pr_err("Critical receive error for QP %d. Resetting port.\n", 653 pr->qp->init_attr.qp_nr); 654 ehea_dump(cqe, sizeof(*cqe), "CQE"); 655 } 656 ehea_schedule_port_reset(pr->port); 657 return 1; 658 } 659 660 return 0; 661 } 662 663 static int ehea_proc_rwqes(struct net_device *dev, 664 struct ehea_port_res *pr, 665 int budget) 666 { 667 struct ehea_port *port = pr->port; 668 struct ehea_qp *qp = pr->qp; 669 struct ehea_cqe *cqe; 670 struct sk_buff *skb; 671 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 672 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; 673 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; 674 int skb_arr_rq1_len = pr->rq1_skba.len; 675 int skb_arr_rq2_len = pr->rq2_skba.len; 676 int skb_arr_rq3_len = pr->rq3_skba.len; 677 int processed, processed_rq1, processed_rq2, processed_rq3; 678 u64 processed_bytes = 0; 679 int wqe_index, last_wqe_index, rq, port_reset; 680 681 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; 682 last_wqe_index = 0; 683 684 cqe = ehea_poll_rq1(qp, &wqe_index); 685 while ((processed < budget) && cqe) { 686 ehea_inc_rq1(qp); 687 processed_rq1++; 688 processed++; 689 if (netif_msg_rx_status(port)) 690 ehea_dump(cqe, sizeof(*cqe), "CQE"); 691 692 last_wqe_index = wqe_index; 693 rmb(); 694 if (!ehea_check_cqe(cqe, &rq)) { 695 if (rq == 1) { 696 /* LL RQ1 */ 697 skb = get_skb_by_index_ll(skb_arr_rq1, 698 skb_arr_rq1_len, 699 wqe_index); 700 if (unlikely(!skb)) { 701 netif_info(port, rx_err, dev, 702 "LL rq1: skb=NULL\n"); 703 704 skb = netdev_alloc_skb(dev, 705 EHEA_L_PKT_SIZE); 706 if (!skb) 707 break; 708 } 709 skb_copy_to_linear_data(skb, ((char *)cqe) + 64, 710 cqe->num_bytes_transfered - 4); 711 ehea_fill_skb(dev, skb, cqe, pr); 712 } else if (rq == 2) { 713 /* RQ2 */ 714 skb = get_skb_by_index(skb_arr_rq2, 715 skb_arr_rq2_len, cqe); 716 if (unlikely(!skb)) { 717 netif_err(port, rx_err, dev, 718 "rq2: skb=NULL\n"); 719 break; 720 } 721 ehea_fill_skb(dev, skb, cqe, pr); 722 processed_rq2++; 723 } else { 724 /* RQ3 */ 725 skb = get_skb_by_index(skb_arr_rq3, 726 skb_arr_rq3_len, cqe); 727 if (unlikely(!skb)) { 728 netif_err(port, rx_err, dev, 729 "rq3: skb=NULL\n"); 730 break; 731 } 732 ehea_fill_skb(dev, skb, cqe, pr); 733 processed_rq3++; 734 } 735 736 processed_bytes += skb->len; 737 738 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 739 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 740 cqe->vlan_tag); 741 742 napi_gro_receive(&pr->napi, skb); 743 } else { 744 pr->p_stats.poll_receive_errors++; 745 port_reset = ehea_treat_poll_error(pr, rq, cqe, 746 &processed_rq2, 747 &processed_rq3); 748 if (port_reset) 749 break; 750 } 751 cqe = ehea_poll_rq1(qp, &wqe_index); 752 } 753 754 pr->rx_packets += processed; 755 pr->rx_bytes += processed_bytes; 756 757 ehea_refill_rq1(pr, last_wqe_index, processed_rq1); 758 ehea_refill_rq2(pr, processed_rq2); 759 ehea_refill_rq3(pr, processed_rq3); 760 761 return processed; 762 } 763 764 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull 765 766 static void reset_sq_restart_flag(struct ehea_port *port) 767 { 768 int i; 769 770 for (i = 0; i < port->num_def_qps; i++) { 771 struct ehea_port_res *pr = &port->port_res[i]; 772 pr->sq_restart_flag = 0; 773 } 774 wake_up(&port->restart_wq); 775 } 776 777 static void check_sqs(struct ehea_port *port) 778 { 779 struct ehea_swqe *swqe; 780 int swqe_index; 781 int i; 782 783 for (i = 0; i < port->num_def_qps; i++) { 784 struct ehea_port_res *pr = &port->port_res[i]; 785 int ret; 786 swqe = ehea_get_swqe(pr->qp, &swqe_index); 787 memset(swqe, 0, SWQE_HEADER_SIZE); 788 atomic_dec(&pr->swqe_avail); 789 790 swqe->tx_control |= EHEA_SWQE_PURGE; 791 swqe->wr_id = SWQE_RESTART_CHECK; 792 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 793 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; 794 swqe->immediate_data_length = 80; 795 796 ehea_post_swqe(pr->qp, swqe); 797 798 ret = wait_event_timeout(port->restart_wq, 799 pr->sq_restart_flag == 0, 800 msecs_to_jiffies(100)); 801 802 if (!ret) { 803 pr_err("HW/SW queues out of sync\n"); 804 ehea_schedule_port_reset(pr->port); 805 return; 806 } 807 } 808 } 809 810 811 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) 812 { 813 struct sk_buff *skb; 814 struct ehea_cq *send_cq = pr->send_cq; 815 struct ehea_cqe *cqe; 816 int quota = my_quota; 817 int cqe_counter = 0; 818 int swqe_av = 0; 819 int index; 820 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, 821 pr - &pr->port->port_res[0]); 822 823 cqe = ehea_poll_cq(send_cq); 824 while (cqe && (quota > 0)) { 825 ehea_inc_cq(send_cq); 826 827 cqe_counter++; 828 rmb(); 829 830 if (cqe->wr_id == SWQE_RESTART_CHECK) { 831 pr->sq_restart_flag = 1; 832 swqe_av++; 833 break; 834 } 835 836 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { 837 pr_err("Bad send completion status=0x%04X\n", 838 cqe->status); 839 840 if (netif_msg_tx_err(pr->port)) 841 ehea_dump(cqe, sizeof(*cqe), "Send CQE"); 842 843 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { 844 pr_err("Resetting port\n"); 845 ehea_schedule_port_reset(pr->port); 846 break; 847 } 848 } 849 850 if (netif_msg_tx_done(pr->port)) 851 ehea_dump(cqe, sizeof(*cqe), "CQE"); 852 853 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) 854 == EHEA_SWQE2_TYPE)) { 855 856 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 857 skb = pr->sq_skba.arr[index]; 858 dev_consume_skb_any(skb); 859 pr->sq_skba.arr[index] = NULL; 860 } 861 862 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); 863 quota--; 864 865 cqe = ehea_poll_cq(send_cq); 866 } 867 868 ehea_update_feca(send_cq, cqe_counter); 869 atomic_add(swqe_av, &pr->swqe_avail); 870 871 if (unlikely(netif_tx_queue_stopped(txq) && 872 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { 873 __netif_tx_lock(txq, smp_processor_id()); 874 if (netif_tx_queue_stopped(txq) && 875 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) 876 netif_tx_wake_queue(txq); 877 __netif_tx_unlock(txq); 878 } 879 880 wake_up(&pr->port->swqe_avail_wq); 881 882 return cqe; 883 } 884 885 #define EHEA_POLL_MAX_CQES 65535 886 887 static int ehea_poll(struct napi_struct *napi, int budget) 888 { 889 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, 890 napi); 891 struct net_device *dev = pr->port->netdev; 892 struct ehea_cqe *cqe; 893 struct ehea_cqe *cqe_skb = NULL; 894 int wqe_index; 895 int rx = 0; 896 897 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 898 rx += ehea_proc_rwqes(dev, pr, budget - rx); 899 900 while (rx != budget) { 901 napi_complete(napi); 902 ehea_reset_cq_ep(pr->recv_cq); 903 ehea_reset_cq_ep(pr->send_cq); 904 ehea_reset_cq_n1(pr->recv_cq); 905 ehea_reset_cq_n1(pr->send_cq); 906 rmb(); 907 cqe = ehea_poll_rq1(pr->qp, &wqe_index); 908 cqe_skb = ehea_poll_cq(pr->send_cq); 909 910 if (!cqe && !cqe_skb) 911 return rx; 912 913 if (!napi_reschedule(napi)) 914 return rx; 915 916 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 917 rx += ehea_proc_rwqes(dev, pr, budget - rx); 918 } 919 920 return rx; 921 } 922 923 static irqreturn_t ehea_recv_irq_handler(int irq, void *param) 924 { 925 struct ehea_port_res *pr = param; 926 927 napi_schedule(&pr->napi); 928 929 return IRQ_HANDLED; 930 } 931 932 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) 933 { 934 struct ehea_port *port = param; 935 struct ehea_eqe *eqe; 936 struct ehea_qp *qp; 937 u32 qp_token; 938 u64 resource_type, aer, aerr; 939 int reset_port = 0; 940 941 eqe = ehea_poll_eq(port->qp_eq); 942 943 while (eqe) { 944 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); 945 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", 946 eqe->entry, qp_token); 947 948 qp = port->port_res[qp_token].qp; 949 950 resource_type = ehea_error_data(port->adapter, qp->fw_handle, 951 &aer, &aerr); 952 953 if (resource_type == EHEA_AER_RESTYPE_QP) { 954 if ((aer & EHEA_AER_RESET_MASK) || 955 (aerr & EHEA_AERR_RESET_MASK)) 956 reset_port = 1; 957 } else 958 reset_port = 1; /* Reset in case of CQ or EQ error */ 959 960 eqe = ehea_poll_eq(port->qp_eq); 961 } 962 963 if (reset_port) { 964 pr_err("Resetting port\n"); 965 ehea_schedule_port_reset(port); 966 } 967 968 return IRQ_HANDLED; 969 } 970 971 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, 972 int logical_port) 973 { 974 int i; 975 976 for (i = 0; i < EHEA_MAX_PORTS; i++) 977 if (adapter->port[i]) 978 if (adapter->port[i]->logical_port_id == logical_port) 979 return adapter->port[i]; 980 return NULL; 981 } 982 983 int ehea_sense_port_attr(struct ehea_port *port) 984 { 985 int ret; 986 u64 hret; 987 struct hcp_ehea_port_cb0 *cb0; 988 989 /* may be called via ehea_neq_tasklet() */ 990 cb0 = (void *)get_zeroed_page(GFP_ATOMIC); 991 if (!cb0) { 992 pr_err("no mem for cb0\n"); 993 ret = -ENOMEM; 994 goto out; 995 } 996 997 hret = ehea_h_query_ehea_port(port->adapter->handle, 998 port->logical_port_id, H_PORT_CB0, 999 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), 1000 cb0); 1001 if (hret != H_SUCCESS) { 1002 ret = -EIO; 1003 goto out_free; 1004 } 1005 1006 /* MAC address */ 1007 port->mac_addr = cb0->port_mac_addr << 16; 1008 1009 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { 1010 ret = -EADDRNOTAVAIL; 1011 goto out_free; 1012 } 1013 1014 /* Port speed */ 1015 switch (cb0->port_speed) { 1016 case H_SPEED_10M_H: 1017 port->port_speed = EHEA_SPEED_10M; 1018 port->full_duplex = 0; 1019 break; 1020 case H_SPEED_10M_F: 1021 port->port_speed = EHEA_SPEED_10M; 1022 port->full_duplex = 1; 1023 break; 1024 case H_SPEED_100M_H: 1025 port->port_speed = EHEA_SPEED_100M; 1026 port->full_duplex = 0; 1027 break; 1028 case H_SPEED_100M_F: 1029 port->port_speed = EHEA_SPEED_100M; 1030 port->full_duplex = 1; 1031 break; 1032 case H_SPEED_1G_F: 1033 port->port_speed = EHEA_SPEED_1G; 1034 port->full_duplex = 1; 1035 break; 1036 case H_SPEED_10G_F: 1037 port->port_speed = EHEA_SPEED_10G; 1038 port->full_duplex = 1; 1039 break; 1040 default: 1041 port->port_speed = 0; 1042 port->full_duplex = 0; 1043 break; 1044 } 1045 1046 port->autoneg = 1; 1047 port->num_mcs = cb0->num_default_qps; 1048 1049 /* Number of default QPs */ 1050 if (use_mcs) 1051 port->num_def_qps = cb0->num_default_qps; 1052 else 1053 port->num_def_qps = 1; 1054 1055 if (!port->num_def_qps) { 1056 ret = -EINVAL; 1057 goto out_free; 1058 } 1059 1060 ret = 0; 1061 out_free: 1062 if (ret || netif_msg_probe(port)) 1063 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); 1064 free_page((unsigned long)cb0); 1065 out: 1066 return ret; 1067 } 1068 1069 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) 1070 { 1071 struct hcp_ehea_port_cb4 *cb4; 1072 u64 hret; 1073 int ret = 0; 1074 1075 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 1076 if (!cb4) { 1077 pr_err("no mem for cb4\n"); 1078 ret = -ENOMEM; 1079 goto out; 1080 } 1081 1082 cb4->port_speed = port_speed; 1083 1084 netif_carrier_off(port->netdev); 1085 1086 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1087 port->logical_port_id, 1088 H_PORT_CB4, H_PORT_CB4_SPEED, cb4); 1089 if (hret == H_SUCCESS) { 1090 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; 1091 1092 hret = ehea_h_query_ehea_port(port->adapter->handle, 1093 port->logical_port_id, 1094 H_PORT_CB4, H_PORT_CB4_SPEED, 1095 cb4); 1096 if (hret == H_SUCCESS) { 1097 switch (cb4->port_speed) { 1098 case H_SPEED_10M_H: 1099 port->port_speed = EHEA_SPEED_10M; 1100 port->full_duplex = 0; 1101 break; 1102 case H_SPEED_10M_F: 1103 port->port_speed = EHEA_SPEED_10M; 1104 port->full_duplex = 1; 1105 break; 1106 case H_SPEED_100M_H: 1107 port->port_speed = EHEA_SPEED_100M; 1108 port->full_duplex = 0; 1109 break; 1110 case H_SPEED_100M_F: 1111 port->port_speed = EHEA_SPEED_100M; 1112 port->full_duplex = 1; 1113 break; 1114 case H_SPEED_1G_F: 1115 port->port_speed = EHEA_SPEED_1G; 1116 port->full_duplex = 1; 1117 break; 1118 case H_SPEED_10G_F: 1119 port->port_speed = EHEA_SPEED_10G; 1120 port->full_duplex = 1; 1121 break; 1122 default: 1123 port->port_speed = 0; 1124 port->full_duplex = 0; 1125 break; 1126 } 1127 } else { 1128 pr_err("Failed sensing port speed\n"); 1129 ret = -EIO; 1130 } 1131 } else { 1132 if (hret == H_AUTHORITY) { 1133 pr_info("Hypervisor denied setting port speed\n"); 1134 ret = -EPERM; 1135 } else { 1136 ret = -EIO; 1137 pr_err("Failed setting port speed\n"); 1138 } 1139 } 1140 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) 1141 netif_carrier_on(port->netdev); 1142 1143 free_page((unsigned long)cb4); 1144 out: 1145 return ret; 1146 } 1147 1148 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) 1149 { 1150 int ret; 1151 u8 ec; 1152 u8 portnum; 1153 struct ehea_port *port; 1154 struct net_device *dev; 1155 1156 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); 1157 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); 1158 port = ehea_get_port(adapter, portnum); 1159 if (!port) { 1160 netdev_err(NULL, "unknown portnum %x\n", portnum); 1161 return; 1162 } 1163 dev = port->netdev; 1164 1165 switch (ec) { 1166 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1167 1168 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1169 if (!netif_carrier_ok(dev)) { 1170 ret = ehea_sense_port_attr(port); 1171 if (ret) { 1172 netdev_err(dev, "failed resensing port attributes\n"); 1173 break; 1174 } 1175 1176 netif_info(port, link, dev, 1177 "Logical port up: %dMbps %s Duplex\n", 1178 port->port_speed, 1179 port->full_duplex == 1 ? 1180 "Full" : "Half"); 1181 1182 netif_carrier_on(dev); 1183 netif_wake_queue(dev); 1184 } 1185 } else 1186 if (netif_carrier_ok(dev)) { 1187 netif_info(port, link, dev, 1188 "Logical port down\n"); 1189 netif_carrier_off(dev); 1190 netif_tx_disable(dev); 1191 } 1192 1193 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1194 port->phy_link = EHEA_PHY_LINK_UP; 1195 netif_info(port, link, dev, 1196 "Physical port up\n"); 1197 if (prop_carrier_state) 1198 netif_carrier_on(dev); 1199 } else { 1200 port->phy_link = EHEA_PHY_LINK_DOWN; 1201 netif_info(port, link, dev, 1202 "Physical port down\n"); 1203 if (prop_carrier_state) 1204 netif_carrier_off(dev); 1205 } 1206 1207 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1208 netdev_info(dev, 1209 "External switch port is primary port\n"); 1210 else 1211 netdev_info(dev, 1212 "External switch port is backup port\n"); 1213 1214 break; 1215 case EHEA_EC_ADAPTER_MALFUNC: 1216 netdev_err(dev, "Adapter malfunction\n"); 1217 break; 1218 case EHEA_EC_PORT_MALFUNC: 1219 netdev_info(dev, "Port malfunction\n"); 1220 netif_carrier_off(dev); 1221 netif_tx_disable(dev); 1222 break; 1223 default: 1224 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1225 break; 1226 } 1227 } 1228 1229 static void ehea_neq_tasklet(unsigned long data) 1230 { 1231 struct ehea_adapter *adapter = (struct ehea_adapter *)data; 1232 struct ehea_eqe *eqe; 1233 u64 event_mask; 1234 1235 eqe = ehea_poll_eq(adapter->neq); 1236 pr_debug("eqe=%p\n", eqe); 1237 1238 while (eqe) { 1239 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1240 ehea_parse_eqe(adapter, eqe->entry); 1241 eqe = ehea_poll_eq(adapter->neq); 1242 pr_debug("next eqe=%p\n", eqe); 1243 } 1244 1245 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1246 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1247 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1248 1249 ehea_h_reset_events(adapter->handle, 1250 adapter->neq->fw_handle, event_mask); 1251 } 1252 1253 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1254 { 1255 struct ehea_adapter *adapter = param; 1256 tasklet_hi_schedule(&adapter->neq_tasklet); 1257 return IRQ_HANDLED; 1258 } 1259 1260 1261 static int ehea_fill_port_res(struct ehea_port_res *pr) 1262 { 1263 int ret; 1264 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1265 1266 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1267 1268 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1269 1270 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1271 1272 return ret; 1273 } 1274 1275 static int ehea_reg_interrupts(struct net_device *dev) 1276 { 1277 struct ehea_port *port = netdev_priv(dev); 1278 struct ehea_port_res *pr; 1279 int i, ret; 1280 1281 1282 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1283 dev->name); 1284 1285 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1286 ehea_qp_aff_irq_handler, 1287 0, port->int_aff_name, port); 1288 if (ret) { 1289 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1290 port->qp_eq->attr.ist1); 1291 goto out_free_qpeq; 1292 } 1293 1294 netif_info(port, ifup, dev, 1295 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1296 port->qp_eq->attr.ist1); 1297 1298 1299 for (i = 0; i < port->num_def_qps; i++) { 1300 pr = &port->port_res[i]; 1301 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1302 "%s-queue%d", dev->name, i); 1303 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1304 ehea_recv_irq_handler, 1305 0, pr->int_send_name, pr); 1306 if (ret) { 1307 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1308 i, pr->eq->attr.ist1); 1309 goto out_free_req; 1310 } 1311 netif_info(port, ifup, dev, 1312 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1313 pr->eq->attr.ist1, i); 1314 } 1315 out: 1316 return ret; 1317 1318 1319 out_free_req: 1320 while (--i >= 0) { 1321 u32 ist = port->port_res[i].eq->attr.ist1; 1322 ibmebus_free_irq(ist, &port->port_res[i]); 1323 } 1324 1325 out_free_qpeq: 1326 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1327 i = port->num_def_qps; 1328 1329 goto out; 1330 1331 } 1332 1333 static void ehea_free_interrupts(struct net_device *dev) 1334 { 1335 struct ehea_port *port = netdev_priv(dev); 1336 struct ehea_port_res *pr; 1337 int i; 1338 1339 /* send */ 1340 1341 for (i = 0; i < port->num_def_qps; i++) { 1342 pr = &port->port_res[i]; 1343 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1344 netif_info(port, intr, dev, 1345 "free send irq for res %d with handle 0x%X\n", 1346 i, pr->eq->attr.ist1); 1347 } 1348 1349 /* associated events */ 1350 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1351 netif_info(port, intr, dev, 1352 "associated event interrupt for handle 0x%X freed\n", 1353 port->qp_eq->attr.ist1); 1354 } 1355 1356 static int ehea_configure_port(struct ehea_port *port) 1357 { 1358 int ret, i; 1359 u64 hret, mask; 1360 struct hcp_ehea_port_cb0 *cb0; 1361 1362 ret = -ENOMEM; 1363 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1364 if (!cb0) 1365 goto out; 1366 1367 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1368 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1369 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1370 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1371 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1372 PXLY_RC_VLAN_FILTER) 1373 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1374 1375 for (i = 0; i < port->num_mcs; i++) 1376 if (use_mcs) 1377 cb0->default_qpn_arr[i] = 1378 port->port_res[i].qp->init_attr.qp_nr; 1379 else 1380 cb0->default_qpn_arr[i] = 1381 port->port_res[0].qp->init_attr.qp_nr; 1382 1383 if (netif_msg_ifup(port)) 1384 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1385 1386 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1387 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1388 1389 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1390 port->logical_port_id, 1391 H_PORT_CB0, mask, cb0); 1392 ret = -EIO; 1393 if (hret != H_SUCCESS) 1394 goto out_free; 1395 1396 ret = 0; 1397 1398 out_free: 1399 free_page((unsigned long)cb0); 1400 out: 1401 return ret; 1402 } 1403 1404 static int ehea_gen_smrs(struct ehea_port_res *pr) 1405 { 1406 int ret; 1407 struct ehea_adapter *adapter = pr->port->adapter; 1408 1409 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1410 if (ret) 1411 goto out; 1412 1413 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1414 if (ret) 1415 goto out_free; 1416 1417 return 0; 1418 1419 out_free: 1420 ehea_rem_mr(&pr->send_mr); 1421 out: 1422 pr_err("Generating SMRS failed\n"); 1423 return -EIO; 1424 } 1425 1426 static int ehea_rem_smrs(struct ehea_port_res *pr) 1427 { 1428 if ((ehea_rem_mr(&pr->send_mr)) || 1429 (ehea_rem_mr(&pr->recv_mr))) 1430 return -EIO; 1431 else 1432 return 0; 1433 } 1434 1435 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1436 { 1437 int arr_size = sizeof(void *) * max_q_entries; 1438 1439 q_skba->arr = vzalloc(arr_size); 1440 if (!q_skba->arr) 1441 return -ENOMEM; 1442 1443 q_skba->len = max_q_entries; 1444 q_skba->index = 0; 1445 q_skba->os_skbs = 0; 1446 1447 return 0; 1448 } 1449 1450 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1451 struct port_res_cfg *pr_cfg, int queue_token) 1452 { 1453 struct ehea_adapter *adapter = port->adapter; 1454 enum ehea_eq_type eq_type = EHEA_EQ; 1455 struct ehea_qp_init_attr *init_attr = NULL; 1456 int ret = -EIO; 1457 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1458 1459 tx_bytes = pr->tx_bytes; 1460 tx_packets = pr->tx_packets; 1461 rx_bytes = pr->rx_bytes; 1462 rx_packets = pr->rx_packets; 1463 1464 memset(pr, 0, sizeof(struct ehea_port_res)); 1465 1466 pr->tx_bytes = rx_bytes; 1467 pr->tx_packets = tx_packets; 1468 pr->rx_bytes = rx_bytes; 1469 pr->rx_packets = rx_packets; 1470 1471 pr->port = port; 1472 1473 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1474 if (!pr->eq) { 1475 pr_err("create_eq failed (eq)\n"); 1476 goto out_free; 1477 } 1478 1479 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1480 pr->eq->fw_handle, 1481 port->logical_port_id); 1482 if (!pr->recv_cq) { 1483 pr_err("create_cq failed (cq_recv)\n"); 1484 goto out_free; 1485 } 1486 1487 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1488 pr->eq->fw_handle, 1489 port->logical_port_id); 1490 if (!pr->send_cq) { 1491 pr_err("create_cq failed (cq_send)\n"); 1492 goto out_free; 1493 } 1494 1495 if (netif_msg_ifup(port)) 1496 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1497 pr->send_cq->attr.act_nr_of_cqes, 1498 pr->recv_cq->attr.act_nr_of_cqes); 1499 1500 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1501 if (!init_attr) { 1502 ret = -ENOMEM; 1503 pr_err("no mem for ehea_qp_init_attr\n"); 1504 goto out_free; 1505 } 1506 1507 init_attr->low_lat_rq1 = 1; 1508 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1509 init_attr->rq_count = 3; 1510 init_attr->qp_token = queue_token; 1511 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1512 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1513 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1514 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1515 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1516 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1517 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1518 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1519 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1520 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1521 init_attr->port_nr = port->logical_port_id; 1522 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1523 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1524 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1525 1526 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1527 if (!pr->qp) { 1528 pr_err("create_qp failed\n"); 1529 ret = -EIO; 1530 goto out_free; 1531 } 1532 1533 if (netif_msg_ifup(port)) 1534 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", 1535 init_attr->qp_nr, 1536 init_attr->act_nr_send_wqes, 1537 init_attr->act_nr_rwqes_rq1, 1538 init_attr->act_nr_rwqes_rq2, 1539 init_attr->act_nr_rwqes_rq3); 1540 1541 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1542 1543 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1544 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1545 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1546 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1547 if (ret) 1548 goto out_free; 1549 1550 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1551 if (ehea_gen_smrs(pr) != 0) { 1552 ret = -EIO; 1553 goto out_free; 1554 } 1555 1556 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1557 1558 kfree(init_attr); 1559 1560 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); 1561 1562 ret = 0; 1563 goto out; 1564 1565 out_free: 1566 kfree(init_attr); 1567 vfree(pr->sq_skba.arr); 1568 vfree(pr->rq1_skba.arr); 1569 vfree(pr->rq2_skba.arr); 1570 vfree(pr->rq3_skba.arr); 1571 ehea_destroy_qp(pr->qp); 1572 ehea_destroy_cq(pr->send_cq); 1573 ehea_destroy_cq(pr->recv_cq); 1574 ehea_destroy_eq(pr->eq); 1575 out: 1576 return ret; 1577 } 1578 1579 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1580 { 1581 int ret, i; 1582 1583 if (pr->qp) 1584 netif_napi_del(&pr->napi); 1585 1586 ret = ehea_destroy_qp(pr->qp); 1587 1588 if (!ret) { 1589 ehea_destroy_cq(pr->send_cq); 1590 ehea_destroy_cq(pr->recv_cq); 1591 ehea_destroy_eq(pr->eq); 1592 1593 for (i = 0; i < pr->rq1_skba.len; i++) 1594 if (pr->rq1_skba.arr[i]) 1595 dev_kfree_skb(pr->rq1_skba.arr[i]); 1596 1597 for (i = 0; i < pr->rq2_skba.len; i++) 1598 if (pr->rq2_skba.arr[i]) 1599 dev_kfree_skb(pr->rq2_skba.arr[i]); 1600 1601 for (i = 0; i < pr->rq3_skba.len; i++) 1602 if (pr->rq3_skba.arr[i]) 1603 dev_kfree_skb(pr->rq3_skba.arr[i]); 1604 1605 for (i = 0; i < pr->sq_skba.len; i++) 1606 if (pr->sq_skba.arr[i]) 1607 dev_kfree_skb(pr->sq_skba.arr[i]); 1608 1609 vfree(pr->rq1_skba.arr); 1610 vfree(pr->rq2_skba.arr); 1611 vfree(pr->rq3_skba.arr); 1612 vfree(pr->sq_skba.arr); 1613 ret = ehea_rem_smrs(pr); 1614 } 1615 return ret; 1616 } 1617 1618 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1619 u32 lkey) 1620 { 1621 int skb_data_size = skb_headlen(skb); 1622 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1623 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1624 unsigned int immediate_len = SWQE2_MAX_IMM; 1625 1626 swqe->descriptors = 0; 1627 1628 if (skb_is_gso(skb)) { 1629 swqe->tx_control |= EHEA_SWQE_TSO; 1630 swqe->mss = skb_shinfo(skb)->gso_size; 1631 /* 1632 * For TSO packets we only copy the headers into the 1633 * immediate area. 1634 */ 1635 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb); 1636 } 1637 1638 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1639 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1640 swqe->immediate_data_length = immediate_len; 1641 1642 if (skb_data_size > immediate_len) { 1643 sg1entry->l_key = lkey; 1644 sg1entry->len = skb_data_size - immediate_len; 1645 sg1entry->vaddr = 1646 ehea_map_vaddr(skb->data + immediate_len); 1647 swqe->descriptors++; 1648 } 1649 } else { 1650 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1651 swqe->immediate_data_length = skb_data_size; 1652 } 1653 } 1654 1655 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1656 struct ehea_swqe *swqe, u32 lkey) 1657 { 1658 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1659 skb_frag_t *frag; 1660 int nfrags, sg1entry_contains_frag_data, i; 1661 1662 nfrags = skb_shinfo(skb)->nr_frags; 1663 sg1entry = &swqe->u.immdata_desc.sg_entry; 1664 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1665 sg1entry_contains_frag_data = 0; 1666 1667 write_swqe2_immediate(skb, swqe, lkey); 1668 1669 /* write descriptors */ 1670 if (nfrags > 0) { 1671 if (swqe->descriptors == 0) { 1672 /* sg1entry not yet used */ 1673 frag = &skb_shinfo(skb)->frags[0]; 1674 1675 /* copy sg1entry data */ 1676 sg1entry->l_key = lkey; 1677 sg1entry->len = skb_frag_size(frag); 1678 sg1entry->vaddr = 1679 ehea_map_vaddr(skb_frag_address(frag)); 1680 swqe->descriptors++; 1681 sg1entry_contains_frag_data = 1; 1682 } 1683 1684 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1685 1686 frag = &skb_shinfo(skb)->frags[i]; 1687 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1688 1689 sgentry->l_key = lkey; 1690 sgentry->len = skb_frag_size(frag); 1691 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1692 swqe->descriptors++; 1693 } 1694 } 1695 } 1696 1697 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1698 { 1699 int ret = 0; 1700 u64 hret; 1701 u8 reg_type; 1702 1703 /* De/Register untagged packets */ 1704 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1705 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1706 port->logical_port_id, 1707 reg_type, port->mac_addr, 0, hcallid); 1708 if (hret != H_SUCCESS) { 1709 pr_err("%sregistering bc address failed (tagged)\n", 1710 hcallid == H_REG_BCMC ? "" : "de"); 1711 ret = -EIO; 1712 goto out_herr; 1713 } 1714 1715 /* De/Register VLAN packets */ 1716 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1717 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1718 port->logical_port_id, 1719 reg_type, port->mac_addr, 0, hcallid); 1720 if (hret != H_SUCCESS) { 1721 pr_err("%sregistering bc address failed (vlan)\n", 1722 hcallid == H_REG_BCMC ? "" : "de"); 1723 ret = -EIO; 1724 } 1725 out_herr: 1726 return ret; 1727 } 1728 1729 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1730 { 1731 struct ehea_port *port = netdev_priv(dev); 1732 struct sockaddr *mac_addr = sa; 1733 struct hcp_ehea_port_cb0 *cb0; 1734 int ret; 1735 u64 hret; 1736 1737 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1738 ret = -EADDRNOTAVAIL; 1739 goto out; 1740 } 1741 1742 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1743 if (!cb0) { 1744 pr_err("no mem for cb0\n"); 1745 ret = -ENOMEM; 1746 goto out; 1747 } 1748 1749 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1750 1751 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1752 1753 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1754 port->logical_port_id, H_PORT_CB0, 1755 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1756 if (hret != H_SUCCESS) { 1757 ret = -EIO; 1758 goto out_free; 1759 } 1760 1761 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); 1762 1763 /* Deregister old MAC in pHYP */ 1764 if (port->state == EHEA_PORT_UP) { 1765 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1766 if (ret) 1767 goto out_upregs; 1768 } 1769 1770 port->mac_addr = cb0->port_mac_addr << 16; 1771 1772 /* Register new MAC in pHYP */ 1773 if (port->state == EHEA_PORT_UP) { 1774 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1775 if (ret) 1776 goto out_upregs; 1777 } 1778 1779 ret = 0; 1780 1781 out_upregs: 1782 ehea_update_bcmc_registrations(); 1783 out_free: 1784 free_page((unsigned long)cb0); 1785 out: 1786 return ret; 1787 } 1788 1789 static void ehea_promiscuous_error(u64 hret, int enable) 1790 { 1791 if (hret == H_AUTHORITY) 1792 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1793 enable == 1 ? "en" : "dis"); 1794 else 1795 pr_err("failed %sabling promiscuous mode\n", 1796 enable == 1 ? "en" : "dis"); 1797 } 1798 1799 static void ehea_promiscuous(struct net_device *dev, int enable) 1800 { 1801 struct ehea_port *port = netdev_priv(dev); 1802 struct hcp_ehea_port_cb7 *cb7; 1803 u64 hret; 1804 1805 if (enable == port->promisc) 1806 return; 1807 1808 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1809 if (!cb7) { 1810 pr_err("no mem for cb7\n"); 1811 goto out; 1812 } 1813 1814 /* Modify Pxs_DUCQPN in CB7 */ 1815 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1816 1817 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1818 port->logical_port_id, 1819 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1820 if (hret) { 1821 ehea_promiscuous_error(hret, enable); 1822 goto out; 1823 } 1824 1825 port->promisc = enable; 1826 out: 1827 free_page((unsigned long)cb7); 1828 } 1829 1830 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1831 u32 hcallid) 1832 { 1833 u64 hret; 1834 u8 reg_type; 1835 1836 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; 1837 if (mc_mac_addr == 0) 1838 reg_type |= EHEA_BCMC_SCOPE_ALL; 1839 1840 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1841 port->logical_port_id, 1842 reg_type, mc_mac_addr, 0, hcallid); 1843 if (hret) 1844 goto out; 1845 1846 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL; 1847 if (mc_mac_addr == 0) 1848 reg_type |= EHEA_BCMC_SCOPE_ALL; 1849 1850 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1851 port->logical_port_id, 1852 reg_type, mc_mac_addr, 0, hcallid); 1853 out: 1854 return hret; 1855 } 1856 1857 static int ehea_drop_multicast_list(struct net_device *dev) 1858 { 1859 struct ehea_port *port = netdev_priv(dev); 1860 struct ehea_mc_list *mc_entry = port->mc_list; 1861 struct list_head *pos; 1862 struct list_head *temp; 1863 int ret = 0; 1864 u64 hret; 1865 1866 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1867 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1868 1869 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1870 H_DEREG_BCMC); 1871 if (hret) { 1872 pr_err("failed deregistering mcast MAC\n"); 1873 ret = -EIO; 1874 } 1875 1876 list_del(pos); 1877 kfree(mc_entry); 1878 } 1879 return ret; 1880 } 1881 1882 static void ehea_allmulti(struct net_device *dev, int enable) 1883 { 1884 struct ehea_port *port = netdev_priv(dev); 1885 u64 hret; 1886 1887 if (!port->allmulti) { 1888 if (enable) { 1889 /* Enable ALLMULTI */ 1890 ehea_drop_multicast_list(dev); 1891 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1892 if (!hret) 1893 port->allmulti = 1; 1894 else 1895 netdev_err(dev, 1896 "failed enabling IFF_ALLMULTI\n"); 1897 } 1898 } else { 1899 if (!enable) { 1900 /* Disable ALLMULTI */ 1901 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1902 if (!hret) 1903 port->allmulti = 0; 1904 else 1905 netdev_err(dev, 1906 "failed disabling IFF_ALLMULTI\n"); 1907 } 1908 } 1909 } 1910 1911 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1912 { 1913 struct ehea_mc_list *ehea_mcl_entry; 1914 u64 hret; 1915 1916 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1917 if (!ehea_mcl_entry) 1918 return; 1919 1920 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1921 1922 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1923 1924 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1925 H_REG_BCMC); 1926 if (!hret) 1927 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1928 else { 1929 pr_err("failed registering mcast MAC\n"); 1930 kfree(ehea_mcl_entry); 1931 } 1932 } 1933 1934 static void ehea_set_multicast_list(struct net_device *dev) 1935 { 1936 struct ehea_port *port = netdev_priv(dev); 1937 struct netdev_hw_addr *ha; 1938 int ret; 1939 1940 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC)); 1941 1942 if (dev->flags & IFF_ALLMULTI) { 1943 ehea_allmulti(dev, 1); 1944 goto out; 1945 } 1946 ehea_allmulti(dev, 0); 1947 1948 if (!netdev_mc_empty(dev)) { 1949 ret = ehea_drop_multicast_list(dev); 1950 if (ret) { 1951 /* Dropping the current multicast list failed. 1952 * Enabling ALL_MULTI is the best we can do. 1953 */ 1954 ehea_allmulti(dev, 1); 1955 } 1956 1957 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1958 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1959 port->adapter->max_mc_mac); 1960 goto out; 1961 } 1962 1963 netdev_for_each_mc_addr(ha, dev) 1964 ehea_add_multicast_entry(port, ha->addr); 1965 1966 } 1967 out: 1968 ehea_update_bcmc_registrations(); 1969 } 1970 1971 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1972 { 1973 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1974 1975 if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 1976 return; 1977 1978 if (skb->ip_summed == CHECKSUM_PARTIAL) 1979 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 1980 1981 swqe->ip_start = skb_network_offset(skb); 1982 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 1983 1984 switch (ip_hdr(skb)->protocol) { 1985 case IPPROTO_UDP: 1986 if (skb->ip_summed == CHECKSUM_PARTIAL) 1987 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1988 1989 swqe->tcp_offset = swqe->ip_end + 1 + 1990 offsetof(struct udphdr, check); 1991 break; 1992 1993 case IPPROTO_TCP: 1994 if (skb->ip_summed == CHECKSUM_PARTIAL) 1995 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1996 1997 swqe->tcp_offset = swqe->ip_end + 1 + 1998 offsetof(struct tcphdr, check); 1999 break; 2000 } 2001 } 2002 2003 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 2004 struct ehea_swqe *swqe, u32 lkey) 2005 { 2006 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 2007 2008 xmit_common(skb, swqe); 2009 2010 write_swqe2_data(skb, dev, swqe, lkey); 2011 } 2012 2013 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 2014 struct ehea_swqe *swqe) 2015 { 2016 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2017 2018 xmit_common(skb, swqe); 2019 2020 if (!skb->data_len) 2021 skb_copy_from_linear_data(skb, imm_data, skb->len); 2022 else 2023 skb_copy_bits(skb, 0, imm_data, skb->len); 2024 2025 swqe->immediate_data_length = skb->len; 2026 dev_consume_skb_any(skb); 2027 } 2028 2029 static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2030 { 2031 struct ehea_port *port = netdev_priv(dev); 2032 struct ehea_swqe *swqe; 2033 u32 lkey; 2034 int swqe_index; 2035 struct ehea_port_res *pr; 2036 struct netdev_queue *txq; 2037 2038 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2039 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2040 2041 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2042 memset(swqe, 0, SWQE_HEADER_SIZE); 2043 atomic_dec(&pr->swqe_avail); 2044 2045 if (skb_vlan_tag_present(skb)) { 2046 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2047 swqe->vlan_tag = skb_vlan_tag_get(skb); 2048 } 2049 2050 pr->tx_packets++; 2051 pr->tx_bytes += skb->len; 2052 2053 if (skb->len <= SWQE3_MAX_IMM) { 2054 u32 sig_iv = port->sig_comp_iv; 2055 u32 swqe_num = pr->swqe_id_counter; 2056 ehea_xmit3(skb, dev, swqe); 2057 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2058 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2059 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2060 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2061 sig_iv); 2062 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2063 pr->swqe_ll_count = 0; 2064 } else 2065 pr->swqe_ll_count += 1; 2066 } else { 2067 swqe->wr_id = 2068 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2069 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2070 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2071 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2072 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2073 2074 pr->sq_skba.index++; 2075 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2076 2077 lkey = pr->send_mr.lkey; 2078 ehea_xmit2(skb, dev, swqe, lkey); 2079 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2080 } 2081 pr->swqe_id_counter += 1; 2082 2083 netif_info(port, tx_queued, dev, 2084 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2085 if (netif_msg_tx_queued(port)) 2086 ehea_dump(swqe, 512, "swqe"); 2087 2088 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2089 netif_tx_stop_queue(txq); 2090 swqe->tx_control |= EHEA_SWQE_PURGE; 2091 } 2092 2093 ehea_post_swqe(pr->qp, swqe); 2094 2095 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2096 pr->p_stats.queue_stopped++; 2097 netif_tx_stop_queue(txq); 2098 } 2099 2100 return NETDEV_TX_OK; 2101 } 2102 2103 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2104 { 2105 struct ehea_port *port = netdev_priv(dev); 2106 struct ehea_adapter *adapter = port->adapter; 2107 struct hcp_ehea_port_cb1 *cb1; 2108 int index; 2109 u64 hret; 2110 int err = 0; 2111 2112 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2113 if (!cb1) { 2114 pr_err("no mem for cb1\n"); 2115 err = -ENOMEM; 2116 goto out; 2117 } 2118 2119 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2120 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2121 if (hret != H_SUCCESS) { 2122 pr_err("query_ehea_port failed\n"); 2123 err = -EINVAL; 2124 goto out; 2125 } 2126 2127 index = (vid / 64); 2128 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2129 2130 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2131 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2132 if (hret != H_SUCCESS) { 2133 pr_err("modify_ehea_port failed\n"); 2134 err = -EINVAL; 2135 } 2136 out: 2137 free_page((unsigned long)cb1); 2138 return err; 2139 } 2140 2141 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2142 { 2143 struct ehea_port *port = netdev_priv(dev); 2144 struct ehea_adapter *adapter = port->adapter; 2145 struct hcp_ehea_port_cb1 *cb1; 2146 int index; 2147 u64 hret; 2148 int err = 0; 2149 2150 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2151 if (!cb1) { 2152 pr_err("no mem for cb1\n"); 2153 err = -ENOMEM; 2154 goto out; 2155 } 2156 2157 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2158 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2159 if (hret != H_SUCCESS) { 2160 pr_err("query_ehea_port failed\n"); 2161 err = -EINVAL; 2162 goto out; 2163 } 2164 2165 index = (vid / 64); 2166 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2167 2168 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2169 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2170 if (hret != H_SUCCESS) { 2171 pr_err("modify_ehea_port failed\n"); 2172 err = -EINVAL; 2173 } 2174 out: 2175 free_page((unsigned long)cb1); 2176 return err; 2177 } 2178 2179 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2180 { 2181 int ret = -EIO; 2182 u64 hret; 2183 u16 dummy16 = 0; 2184 u64 dummy64 = 0; 2185 struct hcp_modify_qp_cb0 *cb0; 2186 2187 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2188 if (!cb0) { 2189 ret = -ENOMEM; 2190 goto out; 2191 } 2192 2193 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2194 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2195 if (hret != H_SUCCESS) { 2196 pr_err("query_ehea_qp failed (1)\n"); 2197 goto out; 2198 } 2199 2200 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2201 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2202 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2203 &dummy64, &dummy64, &dummy16, &dummy16); 2204 if (hret != H_SUCCESS) { 2205 pr_err("modify_ehea_qp failed (1)\n"); 2206 goto out; 2207 } 2208 2209 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2210 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2211 if (hret != H_SUCCESS) { 2212 pr_err("query_ehea_qp failed (2)\n"); 2213 goto out; 2214 } 2215 2216 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2217 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2218 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2219 &dummy64, &dummy64, &dummy16, &dummy16); 2220 if (hret != H_SUCCESS) { 2221 pr_err("modify_ehea_qp failed (2)\n"); 2222 goto out; 2223 } 2224 2225 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2226 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2227 if (hret != H_SUCCESS) { 2228 pr_err("query_ehea_qp failed (3)\n"); 2229 goto out; 2230 } 2231 2232 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2233 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2234 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2235 &dummy64, &dummy64, &dummy16, &dummy16); 2236 if (hret != H_SUCCESS) { 2237 pr_err("modify_ehea_qp failed (3)\n"); 2238 goto out; 2239 } 2240 2241 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2242 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2243 if (hret != H_SUCCESS) { 2244 pr_err("query_ehea_qp failed (4)\n"); 2245 goto out; 2246 } 2247 2248 ret = 0; 2249 out: 2250 free_page((unsigned long)cb0); 2251 return ret; 2252 } 2253 2254 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2255 { 2256 int ret, i; 2257 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2258 enum ehea_eq_type eq_type = EHEA_EQ; 2259 2260 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2261 EHEA_MAX_ENTRIES_EQ, 1); 2262 if (!port->qp_eq) { 2263 ret = -EINVAL; 2264 pr_err("ehea_create_eq failed (qp_eq)\n"); 2265 goto out_kill_eq; 2266 } 2267 2268 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2269 pr_cfg.max_entries_scq = sq_entries * 2; 2270 pr_cfg.max_entries_sq = sq_entries; 2271 pr_cfg.max_entries_rq1 = rq1_entries; 2272 pr_cfg.max_entries_rq2 = rq2_entries; 2273 pr_cfg.max_entries_rq3 = rq3_entries; 2274 2275 pr_cfg_small_rx.max_entries_rcq = 1; 2276 pr_cfg_small_rx.max_entries_scq = sq_entries; 2277 pr_cfg_small_rx.max_entries_sq = sq_entries; 2278 pr_cfg_small_rx.max_entries_rq1 = 1; 2279 pr_cfg_small_rx.max_entries_rq2 = 1; 2280 pr_cfg_small_rx.max_entries_rq3 = 1; 2281 2282 for (i = 0; i < def_qps; i++) { 2283 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2284 if (ret) 2285 goto out_clean_pr; 2286 } 2287 for (i = def_qps; i < def_qps; i++) { 2288 ret = ehea_init_port_res(port, &port->port_res[i], 2289 &pr_cfg_small_rx, i); 2290 if (ret) 2291 goto out_clean_pr; 2292 } 2293 2294 return 0; 2295 2296 out_clean_pr: 2297 while (--i >= 0) 2298 ehea_clean_portres(port, &port->port_res[i]); 2299 2300 out_kill_eq: 2301 ehea_destroy_eq(port->qp_eq); 2302 return ret; 2303 } 2304 2305 static int ehea_clean_all_portres(struct ehea_port *port) 2306 { 2307 int ret = 0; 2308 int i; 2309 2310 for (i = 0; i < port->num_def_qps; i++) 2311 ret |= ehea_clean_portres(port, &port->port_res[i]); 2312 2313 ret |= ehea_destroy_eq(port->qp_eq); 2314 2315 return ret; 2316 } 2317 2318 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2319 { 2320 if (adapter->active_ports) 2321 return; 2322 2323 ehea_rem_mr(&adapter->mr); 2324 } 2325 2326 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2327 { 2328 if (adapter->active_ports) 2329 return 0; 2330 2331 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2332 } 2333 2334 static int ehea_up(struct net_device *dev) 2335 { 2336 int ret, i; 2337 struct ehea_port *port = netdev_priv(dev); 2338 2339 if (port->state == EHEA_PORT_UP) 2340 return 0; 2341 2342 ret = ehea_port_res_setup(port, port->num_def_qps); 2343 if (ret) { 2344 netdev_err(dev, "port_res_failed\n"); 2345 goto out; 2346 } 2347 2348 /* Set default QP for this port */ 2349 ret = ehea_configure_port(port); 2350 if (ret) { 2351 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2352 goto out_clean_pr; 2353 } 2354 2355 ret = ehea_reg_interrupts(dev); 2356 if (ret) { 2357 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2358 goto out_clean_pr; 2359 } 2360 2361 for (i = 0; i < port->num_def_qps; i++) { 2362 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2363 if (ret) { 2364 netdev_err(dev, "activate_qp failed\n"); 2365 goto out_free_irqs; 2366 } 2367 } 2368 2369 for (i = 0; i < port->num_def_qps; i++) { 2370 ret = ehea_fill_port_res(&port->port_res[i]); 2371 if (ret) { 2372 netdev_err(dev, "out_free_irqs\n"); 2373 goto out_free_irqs; 2374 } 2375 } 2376 2377 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2378 if (ret) { 2379 ret = -EIO; 2380 goto out_free_irqs; 2381 } 2382 2383 port->state = EHEA_PORT_UP; 2384 2385 ret = 0; 2386 goto out; 2387 2388 out_free_irqs: 2389 ehea_free_interrupts(dev); 2390 2391 out_clean_pr: 2392 ehea_clean_all_portres(port); 2393 out: 2394 if (ret) 2395 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2396 2397 ehea_update_bcmc_registrations(); 2398 ehea_update_firmware_handles(); 2399 2400 return ret; 2401 } 2402 2403 static void port_napi_disable(struct ehea_port *port) 2404 { 2405 int i; 2406 2407 for (i = 0; i < port->num_def_qps; i++) 2408 napi_disable(&port->port_res[i].napi); 2409 } 2410 2411 static void port_napi_enable(struct ehea_port *port) 2412 { 2413 int i; 2414 2415 for (i = 0; i < port->num_def_qps; i++) 2416 napi_enable(&port->port_res[i].napi); 2417 } 2418 2419 static int ehea_open(struct net_device *dev) 2420 { 2421 int ret; 2422 struct ehea_port *port = netdev_priv(dev); 2423 2424 mutex_lock(&port->port_lock); 2425 2426 netif_info(port, ifup, dev, "enabling port\n"); 2427 2428 netif_carrier_off(dev); 2429 2430 ret = ehea_up(dev); 2431 if (!ret) { 2432 port_napi_enable(port); 2433 netif_tx_start_all_queues(dev); 2434 } 2435 2436 mutex_unlock(&port->port_lock); 2437 schedule_delayed_work(&port->stats_work, 2438 round_jiffies_relative(msecs_to_jiffies(1000))); 2439 2440 return ret; 2441 } 2442 2443 static int ehea_down(struct net_device *dev) 2444 { 2445 int ret; 2446 struct ehea_port *port = netdev_priv(dev); 2447 2448 if (port->state == EHEA_PORT_DOWN) 2449 return 0; 2450 2451 ehea_drop_multicast_list(dev); 2452 ehea_allmulti(dev, 0); 2453 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2454 2455 ehea_free_interrupts(dev); 2456 2457 port->state = EHEA_PORT_DOWN; 2458 2459 ehea_update_bcmc_registrations(); 2460 2461 ret = ehea_clean_all_portres(port); 2462 if (ret) 2463 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2464 2465 ehea_update_firmware_handles(); 2466 2467 return ret; 2468 } 2469 2470 static int ehea_stop(struct net_device *dev) 2471 { 2472 int ret; 2473 struct ehea_port *port = netdev_priv(dev); 2474 2475 netif_info(port, ifdown, dev, "disabling port\n"); 2476 2477 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2478 cancel_work_sync(&port->reset_task); 2479 cancel_delayed_work_sync(&port->stats_work); 2480 mutex_lock(&port->port_lock); 2481 netif_tx_stop_all_queues(dev); 2482 port_napi_disable(port); 2483 ret = ehea_down(dev); 2484 mutex_unlock(&port->port_lock); 2485 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2486 return ret; 2487 } 2488 2489 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2490 { 2491 struct ehea_qp qp = *orig_qp; 2492 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2493 struct ehea_swqe *swqe; 2494 int wqe_index; 2495 int i; 2496 2497 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2498 swqe = ehea_get_swqe(&qp, &wqe_index); 2499 swqe->tx_control |= EHEA_SWQE_PURGE; 2500 } 2501 } 2502 2503 static void ehea_flush_sq(struct ehea_port *port) 2504 { 2505 int i; 2506 2507 for (i = 0; i < port->num_def_qps; i++) { 2508 struct ehea_port_res *pr = &port->port_res[i]; 2509 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2510 int ret; 2511 2512 ret = wait_event_timeout(port->swqe_avail_wq, 2513 atomic_read(&pr->swqe_avail) >= swqe_max, 2514 msecs_to_jiffies(100)); 2515 2516 if (!ret) { 2517 pr_err("WARNING: sq not flushed completely\n"); 2518 break; 2519 } 2520 } 2521 } 2522 2523 static int ehea_stop_qps(struct net_device *dev) 2524 { 2525 struct ehea_port *port = netdev_priv(dev); 2526 struct ehea_adapter *adapter = port->adapter; 2527 struct hcp_modify_qp_cb0 *cb0; 2528 int ret = -EIO; 2529 int dret; 2530 int i; 2531 u64 hret; 2532 u64 dummy64 = 0; 2533 u16 dummy16 = 0; 2534 2535 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2536 if (!cb0) { 2537 ret = -ENOMEM; 2538 goto out; 2539 } 2540 2541 for (i = 0; i < (port->num_def_qps); i++) { 2542 struct ehea_port_res *pr = &port->port_res[i]; 2543 struct ehea_qp *qp = pr->qp; 2544 2545 /* Purge send queue */ 2546 ehea_purge_sq(qp); 2547 2548 /* Disable queue pair */ 2549 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2550 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2551 cb0); 2552 if (hret != H_SUCCESS) { 2553 pr_err("query_ehea_qp failed (1)\n"); 2554 goto out; 2555 } 2556 2557 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2558 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2559 2560 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2561 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2562 1), cb0, &dummy64, 2563 &dummy64, &dummy16, &dummy16); 2564 if (hret != H_SUCCESS) { 2565 pr_err("modify_ehea_qp failed (1)\n"); 2566 goto out; 2567 } 2568 2569 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2570 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2571 cb0); 2572 if (hret != H_SUCCESS) { 2573 pr_err("query_ehea_qp failed (2)\n"); 2574 goto out; 2575 } 2576 2577 /* deregister shared memory regions */ 2578 dret = ehea_rem_smrs(pr); 2579 if (dret) { 2580 pr_err("unreg shared memory region failed\n"); 2581 goto out; 2582 } 2583 } 2584 2585 ret = 0; 2586 out: 2587 free_page((unsigned long)cb0); 2588 2589 return ret; 2590 } 2591 2592 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2593 { 2594 struct ehea_qp qp = *orig_qp; 2595 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2596 struct ehea_rwqe *rwqe; 2597 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2598 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2599 struct sk_buff *skb; 2600 u32 lkey = pr->recv_mr.lkey; 2601 2602 2603 int i; 2604 int index; 2605 2606 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2607 rwqe = ehea_get_next_rwqe(&qp, 2); 2608 rwqe->sg_list[0].l_key = lkey; 2609 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2610 skb = skba_rq2[index]; 2611 if (skb) 2612 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2613 } 2614 2615 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2616 rwqe = ehea_get_next_rwqe(&qp, 3); 2617 rwqe->sg_list[0].l_key = lkey; 2618 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2619 skb = skba_rq3[index]; 2620 if (skb) 2621 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2622 } 2623 } 2624 2625 static int ehea_restart_qps(struct net_device *dev) 2626 { 2627 struct ehea_port *port = netdev_priv(dev); 2628 struct ehea_adapter *adapter = port->adapter; 2629 int ret = 0; 2630 int i; 2631 2632 struct hcp_modify_qp_cb0 *cb0; 2633 u64 hret; 2634 u64 dummy64 = 0; 2635 u16 dummy16 = 0; 2636 2637 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2638 if (!cb0) { 2639 ret = -ENOMEM; 2640 goto out; 2641 } 2642 2643 for (i = 0; i < (port->num_def_qps); i++) { 2644 struct ehea_port_res *pr = &port->port_res[i]; 2645 struct ehea_qp *qp = pr->qp; 2646 2647 ret = ehea_gen_smrs(pr); 2648 if (ret) { 2649 netdev_err(dev, "creation of shared memory regions failed\n"); 2650 goto out; 2651 } 2652 2653 ehea_update_rqs(qp, pr); 2654 2655 /* Enable queue pair */ 2656 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2657 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2658 cb0); 2659 if (hret != H_SUCCESS) { 2660 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2661 goto out; 2662 } 2663 2664 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2665 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2666 2667 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2668 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2669 1), cb0, &dummy64, 2670 &dummy64, &dummy16, &dummy16); 2671 if (hret != H_SUCCESS) { 2672 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2673 goto out; 2674 } 2675 2676 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2677 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2678 cb0); 2679 if (hret != H_SUCCESS) { 2680 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2681 goto out; 2682 } 2683 2684 /* refill entire queue */ 2685 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2686 ehea_refill_rq2(pr, 0); 2687 ehea_refill_rq3(pr, 0); 2688 } 2689 out: 2690 free_page((unsigned long)cb0); 2691 2692 return ret; 2693 } 2694 2695 static void ehea_reset_port(struct work_struct *work) 2696 { 2697 int ret; 2698 struct ehea_port *port = 2699 container_of(work, struct ehea_port, reset_task); 2700 struct net_device *dev = port->netdev; 2701 2702 mutex_lock(&dlpar_mem_lock); 2703 port->resets++; 2704 mutex_lock(&port->port_lock); 2705 netif_tx_disable(dev); 2706 2707 port_napi_disable(port); 2708 2709 ehea_down(dev); 2710 2711 ret = ehea_up(dev); 2712 if (ret) 2713 goto out; 2714 2715 ehea_set_multicast_list(dev); 2716 2717 netif_info(port, timer, dev, "reset successful\n"); 2718 2719 port_napi_enable(port); 2720 2721 netif_tx_wake_all_queues(dev); 2722 out: 2723 mutex_unlock(&port->port_lock); 2724 mutex_unlock(&dlpar_mem_lock); 2725 } 2726 2727 static void ehea_rereg_mrs(void) 2728 { 2729 int ret, i; 2730 struct ehea_adapter *adapter; 2731 2732 pr_info("LPAR memory changed - re-initializing driver\n"); 2733 2734 list_for_each_entry(adapter, &adapter_list, list) 2735 if (adapter->active_ports) { 2736 /* Shutdown all ports */ 2737 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2738 struct ehea_port *port = adapter->port[i]; 2739 struct net_device *dev; 2740 2741 if (!port) 2742 continue; 2743 2744 dev = port->netdev; 2745 2746 if (dev->flags & IFF_UP) { 2747 mutex_lock(&port->port_lock); 2748 netif_tx_disable(dev); 2749 ehea_flush_sq(port); 2750 ret = ehea_stop_qps(dev); 2751 if (ret) { 2752 mutex_unlock(&port->port_lock); 2753 goto out; 2754 } 2755 port_napi_disable(port); 2756 mutex_unlock(&port->port_lock); 2757 } 2758 reset_sq_restart_flag(port); 2759 } 2760 2761 /* Unregister old memory region */ 2762 ret = ehea_rem_mr(&adapter->mr); 2763 if (ret) { 2764 pr_err("unregister MR failed - driver inoperable!\n"); 2765 goto out; 2766 } 2767 } 2768 2769 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2770 2771 list_for_each_entry(adapter, &adapter_list, list) 2772 if (adapter->active_ports) { 2773 /* Register new memory region */ 2774 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2775 if (ret) { 2776 pr_err("register MR failed - driver inoperable!\n"); 2777 goto out; 2778 } 2779 2780 /* Restart all ports */ 2781 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2782 struct ehea_port *port = adapter->port[i]; 2783 2784 if (port) { 2785 struct net_device *dev = port->netdev; 2786 2787 if (dev->flags & IFF_UP) { 2788 mutex_lock(&port->port_lock); 2789 ret = ehea_restart_qps(dev); 2790 if (!ret) { 2791 check_sqs(port); 2792 port_napi_enable(port); 2793 netif_tx_wake_all_queues(dev); 2794 } else { 2795 netdev_err(dev, "Unable to restart QPS\n"); 2796 } 2797 mutex_unlock(&port->port_lock); 2798 } 2799 } 2800 } 2801 } 2802 pr_info("re-initializing driver complete\n"); 2803 out: 2804 return; 2805 } 2806 2807 static void ehea_tx_watchdog(struct net_device *dev) 2808 { 2809 struct ehea_port *port = netdev_priv(dev); 2810 2811 if (netif_carrier_ok(dev) && 2812 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2813 ehea_schedule_port_reset(port); 2814 } 2815 2816 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2817 { 2818 struct hcp_query_ehea *cb; 2819 u64 hret; 2820 int ret; 2821 2822 cb = (void *)get_zeroed_page(GFP_KERNEL); 2823 if (!cb) { 2824 ret = -ENOMEM; 2825 goto out; 2826 } 2827 2828 hret = ehea_h_query_ehea(adapter->handle, cb); 2829 2830 if (hret != H_SUCCESS) { 2831 ret = -EIO; 2832 goto out_herr; 2833 } 2834 2835 adapter->max_mc_mac = cb->max_mc_mac - 1; 2836 ret = 0; 2837 2838 out_herr: 2839 free_page((unsigned long)cb); 2840 out: 2841 return ret; 2842 } 2843 2844 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2845 { 2846 struct hcp_ehea_port_cb4 *cb4; 2847 u64 hret; 2848 int ret = 0; 2849 2850 *jumbo = 0; 2851 2852 /* (Try to) enable *jumbo frames */ 2853 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2854 if (!cb4) { 2855 pr_err("no mem for cb4\n"); 2856 ret = -ENOMEM; 2857 goto out; 2858 } else { 2859 hret = ehea_h_query_ehea_port(port->adapter->handle, 2860 port->logical_port_id, 2861 H_PORT_CB4, 2862 H_PORT_CB4_JUMBO, cb4); 2863 if (hret == H_SUCCESS) { 2864 if (cb4->jumbo_frame) 2865 *jumbo = 1; 2866 else { 2867 cb4->jumbo_frame = 1; 2868 hret = ehea_h_modify_ehea_port(port->adapter-> 2869 handle, 2870 port-> 2871 logical_port_id, 2872 H_PORT_CB4, 2873 H_PORT_CB4_JUMBO, 2874 cb4); 2875 if (hret == H_SUCCESS) 2876 *jumbo = 1; 2877 } 2878 } else 2879 ret = -EINVAL; 2880 2881 free_page((unsigned long)cb4); 2882 } 2883 out: 2884 return ret; 2885 } 2886 2887 static ssize_t ehea_show_port_id(struct device *dev, 2888 struct device_attribute *attr, char *buf) 2889 { 2890 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2891 return sprintf(buf, "%d", port->logical_port_id); 2892 } 2893 2894 static DEVICE_ATTR(log_port_id, 0444, ehea_show_port_id, NULL); 2895 2896 static void logical_port_release(struct device *dev) 2897 { 2898 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2899 of_node_put(port->ofdev.dev.of_node); 2900 } 2901 2902 static struct device *ehea_register_port(struct ehea_port *port, 2903 struct device_node *dn) 2904 { 2905 int ret; 2906 2907 port->ofdev.dev.of_node = of_node_get(dn); 2908 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2909 port->ofdev.dev.bus = &ibmebus_bus_type; 2910 2911 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2912 port->ofdev.dev.release = logical_port_release; 2913 2914 ret = of_device_register(&port->ofdev); 2915 if (ret) { 2916 pr_err("failed to register device. ret=%d\n", ret); 2917 goto out; 2918 } 2919 2920 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2921 if (ret) { 2922 pr_err("failed to register attributes, ret=%d\n", ret); 2923 goto out_unreg_of_dev; 2924 } 2925 2926 return &port->ofdev.dev; 2927 2928 out_unreg_of_dev: 2929 of_device_unregister(&port->ofdev); 2930 out: 2931 return NULL; 2932 } 2933 2934 static void ehea_unregister_port(struct ehea_port *port) 2935 { 2936 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2937 of_device_unregister(&port->ofdev); 2938 } 2939 2940 static const struct net_device_ops ehea_netdev_ops = { 2941 .ndo_open = ehea_open, 2942 .ndo_stop = ehea_stop, 2943 .ndo_start_xmit = ehea_start_xmit, 2944 .ndo_get_stats64 = ehea_get_stats64, 2945 .ndo_set_mac_address = ehea_set_mac_addr, 2946 .ndo_validate_addr = eth_validate_addr, 2947 .ndo_set_rx_mode = ehea_set_multicast_list, 2948 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2949 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2950 .ndo_tx_timeout = ehea_tx_watchdog, 2951 }; 2952 2953 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2954 u32 logical_port_id, 2955 struct device_node *dn) 2956 { 2957 int ret; 2958 struct net_device *dev; 2959 struct ehea_port *port; 2960 struct device *port_dev; 2961 int jumbo; 2962 2963 /* allocate memory for the port structures */ 2964 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2965 2966 if (!dev) { 2967 ret = -ENOMEM; 2968 goto out_err; 2969 } 2970 2971 port = netdev_priv(dev); 2972 2973 mutex_init(&port->port_lock); 2974 port->state = EHEA_PORT_DOWN; 2975 port->sig_comp_iv = sq_entries / 10; 2976 2977 port->adapter = adapter; 2978 port->netdev = dev; 2979 port->logical_port_id = logical_port_id; 2980 2981 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 2982 2983 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 2984 if (!port->mc_list) { 2985 ret = -ENOMEM; 2986 goto out_free_ethdev; 2987 } 2988 2989 INIT_LIST_HEAD(&port->mc_list->list); 2990 2991 ret = ehea_sense_port_attr(port); 2992 if (ret) 2993 goto out_free_mc_list; 2994 2995 netif_set_real_num_rx_queues(dev, port->num_def_qps); 2996 netif_set_real_num_tx_queues(dev, port->num_def_qps); 2997 2998 port_dev = ehea_register_port(port, dn); 2999 if (!port_dev) 3000 goto out_free_mc_list; 3001 3002 SET_NETDEV_DEV(dev, port_dev); 3003 3004 /* initialize net_device structure */ 3005 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); 3006 3007 dev->netdev_ops = &ehea_netdev_ops; 3008 ehea_set_ethtool_ops(dev); 3009 3010 dev->hw_features = NETIF_F_SG | NETIF_F_TSO | 3011 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX; 3012 dev->features = NETIF_F_SG | NETIF_F_TSO | 3013 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | 3014 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 3015 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM; 3016 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3017 NETIF_F_IP_CSUM; 3018 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3019 3020 /* MTU range: 68 - 9022 */ 3021 dev->min_mtu = ETH_MIN_MTU; 3022 dev->max_mtu = EHEA_MAX_PACKET_SIZE; 3023 3024 INIT_WORK(&port->reset_task, ehea_reset_port); 3025 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3026 3027 init_waitqueue_head(&port->swqe_avail_wq); 3028 init_waitqueue_head(&port->restart_wq); 3029 3030 ret = register_netdev(dev); 3031 if (ret) { 3032 pr_err("register_netdev failed. ret=%d\n", ret); 3033 goto out_unreg_port; 3034 } 3035 3036 ret = ehea_get_jumboframe_status(port, &jumbo); 3037 if (ret) 3038 netdev_err(dev, "failed determining jumbo frame status\n"); 3039 3040 netdev_info(dev, "Jumbo frames are %sabled\n", 3041 jumbo == 1 ? "en" : "dis"); 3042 3043 adapter->active_ports++; 3044 3045 return port; 3046 3047 out_unreg_port: 3048 ehea_unregister_port(port); 3049 3050 out_free_mc_list: 3051 kfree(port->mc_list); 3052 3053 out_free_ethdev: 3054 free_netdev(dev); 3055 3056 out_err: 3057 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3058 logical_port_id, ret); 3059 return NULL; 3060 } 3061 3062 static void ehea_shutdown_single_port(struct ehea_port *port) 3063 { 3064 struct ehea_adapter *adapter = port->adapter; 3065 3066 cancel_work_sync(&port->reset_task); 3067 cancel_delayed_work_sync(&port->stats_work); 3068 unregister_netdev(port->netdev); 3069 ehea_unregister_port(port); 3070 kfree(port->mc_list); 3071 free_netdev(port->netdev); 3072 adapter->active_ports--; 3073 } 3074 3075 static int ehea_setup_ports(struct ehea_adapter *adapter) 3076 { 3077 struct device_node *lhea_dn; 3078 struct device_node *eth_dn = NULL; 3079 3080 const u32 *dn_log_port_id; 3081 int i = 0; 3082 3083 lhea_dn = adapter->ofdev->dev.of_node; 3084 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3085 3086 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3087 NULL); 3088 if (!dn_log_port_id) { 3089 pr_err("bad device node: eth_dn name=%pOF\n", eth_dn); 3090 continue; 3091 } 3092 3093 if (ehea_add_adapter_mr(adapter)) { 3094 pr_err("creating MR failed\n"); 3095 of_node_put(eth_dn); 3096 return -EIO; 3097 } 3098 3099 adapter->port[i] = ehea_setup_single_port(adapter, 3100 *dn_log_port_id, 3101 eth_dn); 3102 if (adapter->port[i]) 3103 netdev_info(adapter->port[i]->netdev, 3104 "logical port id #%d\n", *dn_log_port_id); 3105 else 3106 ehea_remove_adapter_mr(adapter); 3107 3108 i++; 3109 } 3110 return 0; 3111 } 3112 3113 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3114 u32 logical_port_id) 3115 { 3116 struct device_node *lhea_dn; 3117 struct device_node *eth_dn = NULL; 3118 const u32 *dn_log_port_id; 3119 3120 lhea_dn = adapter->ofdev->dev.of_node; 3121 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3122 3123 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3124 NULL); 3125 if (dn_log_port_id) 3126 if (*dn_log_port_id == logical_port_id) 3127 return eth_dn; 3128 } 3129 3130 return NULL; 3131 } 3132 3133 static ssize_t ehea_probe_port(struct device *dev, 3134 struct device_attribute *attr, 3135 const char *buf, size_t count) 3136 { 3137 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3138 struct ehea_port *port; 3139 struct device_node *eth_dn = NULL; 3140 int i; 3141 3142 u32 logical_port_id; 3143 3144 sscanf(buf, "%d", &logical_port_id); 3145 3146 port = ehea_get_port(adapter, logical_port_id); 3147 3148 if (port) { 3149 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3150 logical_port_id); 3151 return -EINVAL; 3152 } 3153 3154 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3155 3156 if (!eth_dn) { 3157 pr_info("no logical port with id %d found\n", logical_port_id); 3158 return -EINVAL; 3159 } 3160 3161 if (ehea_add_adapter_mr(adapter)) { 3162 pr_err("creating MR failed\n"); 3163 return -EIO; 3164 } 3165 3166 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3167 3168 of_node_put(eth_dn); 3169 3170 if (port) { 3171 for (i = 0; i < EHEA_MAX_PORTS; i++) 3172 if (!adapter->port[i]) { 3173 adapter->port[i] = port; 3174 break; 3175 } 3176 3177 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3178 logical_port_id); 3179 } else { 3180 ehea_remove_adapter_mr(adapter); 3181 return -EIO; 3182 } 3183 3184 return (ssize_t) count; 3185 } 3186 3187 static ssize_t ehea_remove_port(struct device *dev, 3188 struct device_attribute *attr, 3189 const char *buf, size_t count) 3190 { 3191 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3192 struct ehea_port *port; 3193 int i; 3194 u32 logical_port_id; 3195 3196 sscanf(buf, "%d", &logical_port_id); 3197 3198 port = ehea_get_port(adapter, logical_port_id); 3199 3200 if (port) { 3201 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3202 logical_port_id); 3203 3204 ehea_shutdown_single_port(port); 3205 3206 for (i = 0; i < EHEA_MAX_PORTS; i++) 3207 if (adapter->port[i] == port) { 3208 adapter->port[i] = NULL; 3209 break; 3210 } 3211 } else { 3212 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3213 logical_port_id); 3214 return -EINVAL; 3215 } 3216 3217 ehea_remove_adapter_mr(adapter); 3218 3219 return (ssize_t) count; 3220 } 3221 3222 static DEVICE_ATTR(probe_port, 0200, NULL, ehea_probe_port); 3223 static DEVICE_ATTR(remove_port, 0200, NULL, ehea_remove_port); 3224 3225 static int ehea_create_device_sysfs(struct platform_device *dev) 3226 { 3227 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3228 if (ret) 3229 goto out; 3230 3231 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3232 out: 3233 return ret; 3234 } 3235 3236 static void ehea_remove_device_sysfs(struct platform_device *dev) 3237 { 3238 device_remove_file(&dev->dev, &dev_attr_probe_port); 3239 device_remove_file(&dev->dev, &dev_attr_remove_port); 3240 } 3241 3242 static int ehea_reboot_notifier(struct notifier_block *nb, 3243 unsigned long action, void *unused) 3244 { 3245 if (action == SYS_RESTART) { 3246 pr_info("Reboot: freeing all eHEA resources\n"); 3247 ibmebus_unregister_driver(&ehea_driver); 3248 } 3249 return NOTIFY_DONE; 3250 } 3251 3252 static struct notifier_block ehea_reboot_nb = { 3253 .notifier_call = ehea_reboot_notifier, 3254 }; 3255 3256 static int ehea_mem_notifier(struct notifier_block *nb, 3257 unsigned long action, void *data) 3258 { 3259 int ret = NOTIFY_BAD; 3260 struct memory_notify *arg = data; 3261 3262 mutex_lock(&dlpar_mem_lock); 3263 3264 switch (action) { 3265 case MEM_CANCEL_OFFLINE: 3266 pr_info("memory offlining canceled"); 3267 /* Fall through: re-add canceled memory block */ 3268 3269 case MEM_ONLINE: 3270 pr_info("memory is going online"); 3271 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3272 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3273 goto out_unlock; 3274 ehea_rereg_mrs(); 3275 break; 3276 3277 case MEM_GOING_OFFLINE: 3278 pr_info("memory is going offline"); 3279 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3280 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3281 goto out_unlock; 3282 ehea_rereg_mrs(); 3283 break; 3284 3285 default: 3286 break; 3287 } 3288 3289 ehea_update_firmware_handles(); 3290 ret = NOTIFY_OK; 3291 3292 out_unlock: 3293 mutex_unlock(&dlpar_mem_lock); 3294 return ret; 3295 } 3296 3297 static struct notifier_block ehea_mem_nb = { 3298 .notifier_call = ehea_mem_notifier, 3299 }; 3300 3301 static void ehea_crash_handler(void) 3302 { 3303 int i; 3304 3305 if (ehea_fw_handles.arr) 3306 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3307 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3308 ehea_fw_handles.arr[i].fwh, 3309 FORCE_FREE); 3310 3311 if (ehea_bcmc_regs.arr) 3312 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3313 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3314 ehea_bcmc_regs.arr[i].port_id, 3315 ehea_bcmc_regs.arr[i].reg_type, 3316 ehea_bcmc_regs.arr[i].macaddr, 3317 0, H_DEREG_BCMC); 3318 } 3319 3320 static atomic_t ehea_memory_hooks_registered; 3321 3322 /* Register memory hooks on probe of first adapter */ 3323 static int ehea_register_memory_hooks(void) 3324 { 3325 int ret = 0; 3326 3327 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1) 3328 return 0; 3329 3330 ret = ehea_create_busmap(); 3331 if (ret) { 3332 pr_info("ehea_create_busmap failed\n"); 3333 goto out; 3334 } 3335 3336 ret = register_reboot_notifier(&ehea_reboot_nb); 3337 if (ret) { 3338 pr_info("register_reboot_notifier failed\n"); 3339 goto out; 3340 } 3341 3342 ret = register_memory_notifier(&ehea_mem_nb); 3343 if (ret) { 3344 pr_info("register_memory_notifier failed\n"); 3345 goto out2; 3346 } 3347 3348 ret = crash_shutdown_register(ehea_crash_handler); 3349 if (ret) { 3350 pr_info("crash_shutdown_register failed\n"); 3351 goto out3; 3352 } 3353 3354 return 0; 3355 3356 out3: 3357 unregister_memory_notifier(&ehea_mem_nb); 3358 out2: 3359 unregister_reboot_notifier(&ehea_reboot_nb); 3360 out: 3361 atomic_dec(&ehea_memory_hooks_registered); 3362 return ret; 3363 } 3364 3365 static void ehea_unregister_memory_hooks(void) 3366 { 3367 /* Only remove the hooks if we've registered them */ 3368 if (atomic_read(&ehea_memory_hooks_registered) == 0) 3369 return; 3370 3371 unregister_reboot_notifier(&ehea_reboot_nb); 3372 if (crash_shutdown_unregister(ehea_crash_handler)) 3373 pr_info("failed unregistering crash handler\n"); 3374 unregister_memory_notifier(&ehea_mem_nb); 3375 } 3376 3377 static int ehea_probe_adapter(struct platform_device *dev) 3378 { 3379 struct ehea_adapter *adapter; 3380 const u64 *adapter_handle; 3381 int ret; 3382 int i; 3383 3384 ret = ehea_register_memory_hooks(); 3385 if (ret) 3386 return ret; 3387 3388 if (!dev || !dev->dev.of_node) { 3389 pr_err("Invalid ibmebus device probed\n"); 3390 return -EINVAL; 3391 } 3392 3393 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL); 3394 if (!adapter) { 3395 ret = -ENOMEM; 3396 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3397 goto out; 3398 } 3399 3400 list_add(&adapter->list, &adapter_list); 3401 3402 adapter->ofdev = dev; 3403 3404 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3405 NULL); 3406 if (adapter_handle) 3407 adapter->handle = *adapter_handle; 3408 3409 if (!adapter->handle) { 3410 dev_err(&dev->dev, "failed getting handle for adapter" 3411 " '%pOF'\n", dev->dev.of_node); 3412 ret = -ENODEV; 3413 goto out_free_ad; 3414 } 3415 3416 adapter->pd = EHEA_PD_ID; 3417 3418 platform_set_drvdata(dev, adapter); 3419 3420 3421 /* initialize adapter and ports */ 3422 /* get adapter properties */ 3423 ret = ehea_sense_adapter_attr(adapter); 3424 if (ret) { 3425 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3426 goto out_free_ad; 3427 } 3428 3429 adapter->neq = ehea_create_eq(adapter, 3430 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3431 if (!adapter->neq) { 3432 ret = -EIO; 3433 dev_err(&dev->dev, "NEQ creation failed\n"); 3434 goto out_free_ad; 3435 } 3436 3437 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, 3438 (unsigned long)adapter); 3439 3440 ret = ehea_create_device_sysfs(dev); 3441 if (ret) 3442 goto out_kill_eq; 3443 3444 ret = ehea_setup_ports(adapter); 3445 if (ret) { 3446 dev_err(&dev->dev, "setup_ports failed\n"); 3447 goto out_rem_dev_sysfs; 3448 } 3449 3450 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3451 ehea_interrupt_neq, 0, 3452 "ehea_neq", adapter); 3453 if (ret) { 3454 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3455 goto out_shutdown_ports; 3456 } 3457 3458 /* Handle any events that might be pending. */ 3459 tasklet_hi_schedule(&adapter->neq_tasklet); 3460 3461 ret = 0; 3462 goto out; 3463 3464 out_shutdown_ports: 3465 for (i = 0; i < EHEA_MAX_PORTS; i++) 3466 if (adapter->port[i]) { 3467 ehea_shutdown_single_port(adapter->port[i]); 3468 adapter->port[i] = NULL; 3469 } 3470 3471 out_rem_dev_sysfs: 3472 ehea_remove_device_sysfs(dev); 3473 3474 out_kill_eq: 3475 ehea_destroy_eq(adapter->neq); 3476 3477 out_free_ad: 3478 list_del(&adapter->list); 3479 3480 out: 3481 ehea_update_firmware_handles(); 3482 3483 return ret; 3484 } 3485 3486 static int ehea_remove(struct platform_device *dev) 3487 { 3488 struct ehea_adapter *adapter = platform_get_drvdata(dev); 3489 int i; 3490 3491 for (i = 0; i < EHEA_MAX_PORTS; i++) 3492 if (adapter->port[i]) { 3493 ehea_shutdown_single_port(adapter->port[i]); 3494 adapter->port[i] = NULL; 3495 } 3496 3497 ehea_remove_device_sysfs(dev); 3498 3499 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3500 tasklet_kill(&adapter->neq_tasklet); 3501 3502 ehea_destroy_eq(adapter->neq); 3503 ehea_remove_adapter_mr(adapter); 3504 list_del(&adapter->list); 3505 3506 ehea_update_firmware_handles(); 3507 3508 return 0; 3509 } 3510 3511 static int check_module_parm(void) 3512 { 3513 int ret = 0; 3514 3515 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3516 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3517 pr_info("Bad parameter: rq1_entries\n"); 3518 ret = -EINVAL; 3519 } 3520 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3521 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3522 pr_info("Bad parameter: rq2_entries\n"); 3523 ret = -EINVAL; 3524 } 3525 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3526 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3527 pr_info("Bad parameter: rq3_entries\n"); 3528 ret = -EINVAL; 3529 } 3530 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3531 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3532 pr_info("Bad parameter: sq_entries\n"); 3533 ret = -EINVAL; 3534 } 3535 3536 return ret; 3537 } 3538 3539 static ssize_t capabilities_show(struct device_driver *drv, char *buf) 3540 { 3541 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3542 } 3543 3544 static DRIVER_ATTR_RO(capabilities); 3545 3546 static int __init ehea_module_init(void) 3547 { 3548 int ret; 3549 3550 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3551 3552 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3553 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3554 3555 mutex_init(&ehea_fw_handles.lock); 3556 spin_lock_init(&ehea_bcmc_regs.lock); 3557 3558 ret = check_module_parm(); 3559 if (ret) 3560 goto out; 3561 3562 ret = ibmebus_register_driver(&ehea_driver); 3563 if (ret) { 3564 pr_err("failed registering eHEA device driver on ebus\n"); 3565 goto out; 3566 } 3567 3568 ret = driver_create_file(&ehea_driver.driver, 3569 &driver_attr_capabilities); 3570 if (ret) { 3571 pr_err("failed to register capabilities attribute, ret=%d\n", 3572 ret); 3573 goto out2; 3574 } 3575 3576 return ret; 3577 3578 out2: 3579 ibmebus_unregister_driver(&ehea_driver); 3580 out: 3581 return ret; 3582 } 3583 3584 static void __exit ehea_module_exit(void) 3585 { 3586 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3587 ibmebus_unregister_driver(&ehea_driver); 3588 ehea_unregister_memory_hooks(); 3589 kfree(ehea_fw_handles.arr); 3590 kfree(ehea_bcmc_regs.arr); 3591 ehea_destroy_busmap(); 3592 } 3593 3594 module_init(ehea_module_init); 3595 module_exit(ehea_module_exit); 3596