1 /* 2 * linux/drivers/net/ethernet/ibm/ehea/ehea_main.c 3 * 4 * eHEA ethernet device driver for IBM eServer System p 5 * 6 * (C) Copyright IBM Corp. 2006 7 * 8 * Authors: 9 * Christoph Raisch <raisch@de.ibm.com> 10 * Jan-Bernd Themann <themann@de.ibm.com> 11 * Thomas Klein <tklein@de.ibm.com> 12 * 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2, or (at your option) 17 * any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 27 */ 28 29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 30 31 #include <linux/device.h> 32 #include <linux/in.h> 33 #include <linux/ip.h> 34 #include <linux/tcp.h> 35 #include <linux/udp.h> 36 #include <linux/if.h> 37 #include <linux/list.h> 38 #include <linux/slab.h> 39 #include <linux/if_ether.h> 40 #include <linux/notifier.h> 41 #include <linux/reboot.h> 42 #include <linux/memory.h> 43 #include <asm/kexec.h> 44 #include <linux/mutex.h> 45 #include <linux/prefetch.h> 46 47 #include <net/ip.h> 48 49 #include "ehea.h" 50 #include "ehea_qmr.h" 51 #include "ehea_phyp.h" 52 53 54 MODULE_LICENSE("GPL"); 55 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>"); 56 MODULE_DESCRIPTION("IBM eServer HEA Driver"); 57 MODULE_VERSION(DRV_VERSION); 58 59 60 static int msg_level = -1; 61 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1; 62 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2; 63 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3; 64 static int sq_entries = EHEA_DEF_ENTRIES_SQ; 65 static int use_mcs = 1; 66 static int prop_carrier_state; 67 68 module_param(msg_level, int, 0); 69 module_param(rq1_entries, int, 0); 70 module_param(rq2_entries, int, 0); 71 module_param(rq3_entries, int, 0); 72 module_param(sq_entries, int, 0); 73 module_param(prop_carrier_state, int, 0); 74 module_param(use_mcs, int, 0); 75 76 MODULE_PARM_DESC(msg_level, "msg_level"); 77 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical " 78 "port to stack. 1:yes, 0:no. Default = 0 "); 79 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 " 80 "[2^x - 1], x = [7..14]. Default = " 81 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")"); 82 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 " 83 "[2^x - 1], x = [7..14]. Default = " 84 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")"); 85 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 " 86 "[2^x - 1], x = [7..14]. Default = " 87 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")"); 88 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue " 89 "[2^x - 1], x = [7..14]. Default = " 90 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); 91 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, " 92 "Default = 1"); 93 94 static int port_name_cnt; 95 static LIST_HEAD(adapter_list); 96 static unsigned long ehea_driver_flags; 97 static DEFINE_MUTEX(dlpar_mem_lock); 98 static struct ehea_fw_handle_array ehea_fw_handles; 99 static struct ehea_bcmc_reg_array ehea_bcmc_regs; 100 101 102 static int ehea_probe_adapter(struct platform_device *dev); 103 104 static int ehea_remove(struct platform_device *dev); 105 106 static const struct of_device_id ehea_module_device_table[] = { 107 { 108 .name = "lhea", 109 .compatible = "IBM,lhea", 110 }, 111 { 112 .type = "network", 113 .compatible = "IBM,lhea-ethernet", 114 }, 115 {}, 116 }; 117 MODULE_DEVICE_TABLE(of, ehea_module_device_table); 118 119 static const struct of_device_id ehea_device_table[] = { 120 { 121 .name = "lhea", 122 .compatible = "IBM,lhea", 123 }, 124 {}, 125 }; 126 127 static struct platform_driver ehea_driver = { 128 .driver = { 129 .name = "ehea", 130 .owner = THIS_MODULE, 131 .of_match_table = ehea_device_table, 132 }, 133 .probe = ehea_probe_adapter, 134 .remove = ehea_remove, 135 }; 136 137 void ehea_dump(void *adr, int len, char *msg) 138 { 139 int x; 140 unsigned char *deb = adr; 141 for (x = 0; x < len; x += 16) { 142 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n", 143 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8])); 144 deb += 16; 145 } 146 } 147 148 static void ehea_schedule_port_reset(struct ehea_port *port) 149 { 150 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags)) 151 schedule_work(&port->reset_task); 152 } 153 154 static void ehea_update_firmware_handles(void) 155 { 156 struct ehea_fw_handle_entry *arr = NULL; 157 struct ehea_adapter *adapter; 158 int num_adapters = 0; 159 int num_ports = 0; 160 int num_portres = 0; 161 int i = 0; 162 int num_fw_handles, k, l; 163 164 /* Determine number of handles */ 165 mutex_lock(&ehea_fw_handles.lock); 166 167 list_for_each_entry(adapter, &adapter_list, list) { 168 num_adapters++; 169 170 for (k = 0; k < EHEA_MAX_PORTS; k++) { 171 struct ehea_port *port = adapter->port[k]; 172 173 if (!port || (port->state != EHEA_PORT_UP)) 174 continue; 175 176 num_ports++; 177 num_portres += port->num_def_qps; 178 } 179 } 180 181 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES + 182 num_ports * EHEA_NUM_PORT_FW_HANDLES + 183 num_portres * EHEA_NUM_PORTRES_FW_HANDLES; 184 185 if (num_fw_handles) { 186 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL); 187 if (!arr) 188 goto out; /* Keep the existing array */ 189 } else 190 goto out_update; 191 192 list_for_each_entry(adapter, &adapter_list, list) { 193 if (num_adapters == 0) 194 break; 195 196 for (k = 0; k < EHEA_MAX_PORTS; k++) { 197 struct ehea_port *port = adapter->port[k]; 198 199 if (!port || (port->state != EHEA_PORT_UP) || 200 (num_ports == 0)) 201 continue; 202 203 for (l = 0; l < port->num_def_qps; l++) { 204 struct ehea_port_res *pr = &port->port_res[l]; 205 206 arr[i].adh = adapter->handle; 207 arr[i++].fwh = pr->qp->fw_handle; 208 arr[i].adh = adapter->handle; 209 arr[i++].fwh = pr->send_cq->fw_handle; 210 arr[i].adh = adapter->handle; 211 arr[i++].fwh = pr->recv_cq->fw_handle; 212 arr[i].adh = adapter->handle; 213 arr[i++].fwh = pr->eq->fw_handle; 214 arr[i].adh = adapter->handle; 215 arr[i++].fwh = pr->send_mr.handle; 216 arr[i].adh = adapter->handle; 217 arr[i++].fwh = pr->recv_mr.handle; 218 } 219 arr[i].adh = adapter->handle; 220 arr[i++].fwh = port->qp_eq->fw_handle; 221 num_ports--; 222 } 223 224 arr[i].adh = adapter->handle; 225 arr[i++].fwh = adapter->neq->fw_handle; 226 227 if (adapter->mr.handle) { 228 arr[i].adh = adapter->handle; 229 arr[i++].fwh = adapter->mr.handle; 230 } 231 num_adapters--; 232 } 233 234 out_update: 235 kfree(ehea_fw_handles.arr); 236 ehea_fw_handles.arr = arr; 237 ehea_fw_handles.num_entries = i; 238 out: 239 mutex_unlock(&ehea_fw_handles.lock); 240 } 241 242 static void ehea_update_bcmc_registrations(void) 243 { 244 unsigned long flags; 245 struct ehea_bcmc_reg_entry *arr = NULL; 246 struct ehea_adapter *adapter; 247 struct ehea_mc_list *mc_entry; 248 int num_registrations = 0; 249 int i = 0; 250 int k; 251 252 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags); 253 254 /* Determine number of registrations */ 255 list_for_each_entry(adapter, &adapter_list, list) 256 for (k = 0; k < EHEA_MAX_PORTS; k++) { 257 struct ehea_port *port = adapter->port[k]; 258 259 if (!port || (port->state != EHEA_PORT_UP)) 260 continue; 261 262 num_registrations += 2; /* Broadcast registrations */ 263 264 list_for_each_entry(mc_entry, &port->mc_list->list,list) 265 num_registrations += 2; 266 } 267 268 if (num_registrations) { 269 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC); 270 if (!arr) 271 goto out; /* Keep the existing array */ 272 } else 273 goto out_update; 274 275 list_for_each_entry(adapter, &adapter_list, list) { 276 for (k = 0; k < EHEA_MAX_PORTS; k++) { 277 struct ehea_port *port = adapter->port[k]; 278 279 if (!port || (port->state != EHEA_PORT_UP)) 280 continue; 281 282 if (num_registrations == 0) 283 goto out_update; 284 285 arr[i].adh = adapter->handle; 286 arr[i].port_id = port->logical_port_id; 287 arr[i].reg_type = EHEA_BCMC_BROADCAST | 288 EHEA_BCMC_UNTAGGED; 289 arr[i++].macaddr = port->mac_addr; 290 291 arr[i].adh = adapter->handle; 292 arr[i].port_id = port->logical_port_id; 293 arr[i].reg_type = EHEA_BCMC_BROADCAST | 294 EHEA_BCMC_VLANID_ALL; 295 arr[i++].macaddr = port->mac_addr; 296 num_registrations -= 2; 297 298 list_for_each_entry(mc_entry, 299 &port->mc_list->list, list) { 300 if (num_registrations == 0) 301 goto out_update; 302 303 arr[i].adh = adapter->handle; 304 arr[i].port_id = port->logical_port_id; 305 arr[i].reg_type = EHEA_BCMC_MULTICAST | 306 EHEA_BCMC_UNTAGGED; 307 if (mc_entry->macaddr == 0) 308 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 309 arr[i++].macaddr = mc_entry->macaddr; 310 311 arr[i].adh = adapter->handle; 312 arr[i].port_id = port->logical_port_id; 313 arr[i].reg_type = EHEA_BCMC_MULTICAST | 314 EHEA_BCMC_VLANID_ALL; 315 if (mc_entry->macaddr == 0) 316 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 317 arr[i++].macaddr = mc_entry->macaddr; 318 num_registrations -= 2; 319 } 320 } 321 } 322 323 out_update: 324 kfree(ehea_bcmc_regs.arr); 325 ehea_bcmc_regs.arr = arr; 326 ehea_bcmc_regs.num_entries = i; 327 out: 328 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags); 329 } 330 331 static void ehea_get_stats64(struct net_device *dev, 332 struct rtnl_link_stats64 *stats) 333 { 334 struct ehea_port *port = netdev_priv(dev); 335 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0; 336 int i; 337 338 for (i = 0; i < port->num_def_qps; i++) { 339 rx_packets += port->port_res[i].rx_packets; 340 rx_bytes += port->port_res[i].rx_bytes; 341 } 342 343 for (i = 0; i < port->num_def_qps; i++) { 344 tx_packets += port->port_res[i].tx_packets; 345 tx_bytes += port->port_res[i].tx_bytes; 346 } 347 348 stats->tx_packets = tx_packets; 349 stats->rx_bytes = rx_bytes; 350 stats->tx_bytes = tx_bytes; 351 stats->rx_packets = rx_packets; 352 353 stats->multicast = port->stats.multicast; 354 stats->rx_errors = port->stats.rx_errors; 355 } 356 357 static void ehea_update_stats(struct work_struct *work) 358 { 359 struct ehea_port *port = 360 container_of(work, struct ehea_port, stats_work.work); 361 struct net_device *dev = port->netdev; 362 struct rtnl_link_stats64 *stats = &port->stats; 363 struct hcp_ehea_port_cb2 *cb2; 364 u64 hret; 365 366 cb2 = (void *)get_zeroed_page(GFP_KERNEL); 367 if (!cb2) { 368 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n"); 369 goto resched; 370 } 371 372 hret = ehea_h_query_ehea_port(port->adapter->handle, 373 port->logical_port_id, 374 H_PORT_CB2, H_PORT_CB2_ALL, cb2); 375 if (hret != H_SUCCESS) { 376 netdev_err(dev, "query_ehea_port failed\n"); 377 goto out_herr; 378 } 379 380 if (netif_msg_hw(port)) 381 ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); 382 383 stats->multicast = cb2->rxmcp; 384 stats->rx_errors = cb2->rxuerr; 385 386 out_herr: 387 free_page((unsigned long)cb2); 388 resched: 389 schedule_delayed_work(&port->stats_work, 390 round_jiffies_relative(msecs_to_jiffies(1000))); 391 } 392 393 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) 394 { 395 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 396 struct net_device *dev = pr->port->netdev; 397 int max_index_mask = pr->rq1_skba.len - 1; 398 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; 399 int adder = 0; 400 int i; 401 402 pr->rq1_skba.os_skbs = 0; 403 404 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 405 if (nr_of_wqes > 0) 406 pr->rq1_skba.index = index; 407 pr->rq1_skba.os_skbs = fill_wqes; 408 return; 409 } 410 411 for (i = 0; i < fill_wqes; i++) { 412 if (!skb_arr_rq1[index]) { 413 skb_arr_rq1[index] = netdev_alloc_skb(dev, 414 EHEA_L_PKT_SIZE); 415 if (!skb_arr_rq1[index]) { 416 pr->rq1_skba.os_skbs = fill_wqes - i; 417 break; 418 } 419 } 420 index--; 421 index &= max_index_mask; 422 adder++; 423 } 424 425 if (adder == 0) 426 return; 427 428 /* Ring doorbell */ 429 ehea_update_rq1a(pr->qp, adder); 430 } 431 432 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) 433 { 434 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 435 struct net_device *dev = pr->port->netdev; 436 int i; 437 438 if (nr_rq1a > pr->rq1_skba.len) { 439 netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); 440 return; 441 } 442 443 for (i = 0; i < nr_rq1a; i++) { 444 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); 445 if (!skb_arr_rq1[i]) 446 break; 447 } 448 /* Ring doorbell */ 449 ehea_update_rq1a(pr->qp, i - 1); 450 } 451 452 static int ehea_refill_rq_def(struct ehea_port_res *pr, 453 struct ehea_q_skb_arr *q_skba, int rq_nr, 454 int num_wqes, int wqe_type, int packet_size) 455 { 456 struct net_device *dev = pr->port->netdev; 457 struct ehea_qp *qp = pr->qp; 458 struct sk_buff **skb_arr = q_skba->arr; 459 struct ehea_rwqe *rwqe; 460 int i, index, max_index_mask, fill_wqes; 461 int adder = 0; 462 int ret = 0; 463 464 fill_wqes = q_skba->os_skbs + num_wqes; 465 q_skba->os_skbs = 0; 466 467 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 468 q_skba->os_skbs = fill_wqes; 469 return ret; 470 } 471 472 index = q_skba->index; 473 max_index_mask = q_skba->len - 1; 474 for (i = 0; i < fill_wqes; i++) { 475 u64 tmp_addr; 476 struct sk_buff *skb; 477 478 skb = netdev_alloc_skb_ip_align(dev, packet_size); 479 if (!skb) { 480 q_skba->os_skbs = fill_wqes - i; 481 if (q_skba->os_skbs == q_skba->len - 2) { 482 netdev_info(pr->port->netdev, 483 "rq%i ran dry - no mem for skb\n", 484 rq_nr); 485 ret = -ENOMEM; 486 } 487 break; 488 } 489 490 skb_arr[index] = skb; 491 tmp_addr = ehea_map_vaddr(skb->data); 492 if (tmp_addr == -1) { 493 dev_consume_skb_any(skb); 494 q_skba->os_skbs = fill_wqes - i; 495 ret = 0; 496 break; 497 } 498 499 rwqe = ehea_get_next_rwqe(qp, rq_nr); 500 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type) 501 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index); 502 rwqe->sg_list[0].l_key = pr->recv_mr.lkey; 503 rwqe->sg_list[0].vaddr = tmp_addr; 504 rwqe->sg_list[0].len = packet_size; 505 rwqe->data_segments = 1; 506 507 index++; 508 index &= max_index_mask; 509 adder++; 510 } 511 512 q_skba->index = index; 513 if (adder == 0) 514 goto out; 515 516 /* Ring doorbell */ 517 iosync(); 518 if (rq_nr == 2) 519 ehea_update_rq2a(pr->qp, adder); 520 else 521 ehea_update_rq3a(pr->qp, adder); 522 out: 523 return ret; 524 } 525 526 527 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) 528 { 529 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, 530 nr_of_wqes, EHEA_RWQE2_TYPE, 531 EHEA_RQ2_PKT_SIZE); 532 } 533 534 535 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) 536 { 537 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, 538 nr_of_wqes, EHEA_RWQE3_TYPE, 539 EHEA_MAX_PACKET_SIZE); 540 } 541 542 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) 543 { 544 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; 545 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) 546 return 0; 547 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && 548 (cqe->header_length == 0)) 549 return 0; 550 return -EINVAL; 551 } 552 553 static inline void ehea_fill_skb(struct net_device *dev, 554 struct sk_buff *skb, struct ehea_cqe *cqe, 555 struct ehea_port_res *pr) 556 { 557 int length = cqe->num_bytes_transfered - 4; /*remove CRC */ 558 559 skb_put(skb, length); 560 skb->protocol = eth_type_trans(skb, dev); 561 562 /* The packet was not an IPV4 packet so a complemented checksum was 563 calculated. The value is found in the Internet Checksum field. */ 564 if (cqe->status & EHEA_CQE_BLIND_CKSUM) { 565 skb->ip_summed = CHECKSUM_COMPLETE; 566 skb->csum = csum_unfold(~cqe->inet_checksum_value); 567 } else 568 skb->ip_summed = CHECKSUM_UNNECESSARY; 569 570 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]); 571 } 572 573 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, 574 int arr_len, 575 struct ehea_cqe *cqe) 576 { 577 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 578 struct sk_buff *skb; 579 void *pref; 580 int x; 581 582 x = skb_index + 1; 583 x &= (arr_len - 1); 584 585 pref = skb_array[x]; 586 if (pref) { 587 prefetchw(pref); 588 prefetchw(pref + EHEA_CACHE_LINE); 589 590 pref = (skb_array[x]->data); 591 prefetch(pref); 592 prefetch(pref + EHEA_CACHE_LINE); 593 prefetch(pref + EHEA_CACHE_LINE * 2); 594 prefetch(pref + EHEA_CACHE_LINE * 3); 595 } 596 597 skb = skb_array[skb_index]; 598 skb_array[skb_index] = NULL; 599 return skb; 600 } 601 602 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, 603 int arr_len, int wqe_index) 604 { 605 struct sk_buff *skb; 606 void *pref; 607 int x; 608 609 x = wqe_index + 1; 610 x &= (arr_len - 1); 611 612 pref = skb_array[x]; 613 if (pref) { 614 prefetchw(pref); 615 prefetchw(pref + EHEA_CACHE_LINE); 616 617 pref = (skb_array[x]->data); 618 prefetchw(pref); 619 prefetchw(pref + EHEA_CACHE_LINE); 620 } 621 622 skb = skb_array[wqe_index]; 623 skb_array[wqe_index] = NULL; 624 return skb; 625 } 626 627 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, 628 struct ehea_cqe *cqe, int *processed_rq2, 629 int *processed_rq3) 630 { 631 struct sk_buff *skb; 632 633 if (cqe->status & EHEA_CQE_STAT_ERR_TCP) 634 pr->p_stats.err_tcp_cksum++; 635 if (cqe->status & EHEA_CQE_STAT_ERR_IP) 636 pr->p_stats.err_ip_cksum++; 637 if (cqe->status & EHEA_CQE_STAT_ERR_CRC) 638 pr->p_stats.err_frame_crc++; 639 640 if (rq == 2) { 641 *processed_rq2 += 1; 642 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe); 643 dev_kfree_skb(skb); 644 } else if (rq == 3) { 645 *processed_rq3 += 1; 646 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe); 647 dev_kfree_skb(skb); 648 } 649 650 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) { 651 if (netif_msg_rx_err(pr->port)) { 652 pr_err("Critical receive error for QP %d. Resetting port.\n", 653 pr->qp->init_attr.qp_nr); 654 ehea_dump(cqe, sizeof(*cqe), "CQE"); 655 } 656 ehea_schedule_port_reset(pr->port); 657 return 1; 658 } 659 660 return 0; 661 } 662 663 static int ehea_proc_rwqes(struct net_device *dev, 664 struct ehea_port_res *pr, 665 int budget) 666 { 667 struct ehea_port *port = pr->port; 668 struct ehea_qp *qp = pr->qp; 669 struct ehea_cqe *cqe; 670 struct sk_buff *skb; 671 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 672 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; 673 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; 674 int skb_arr_rq1_len = pr->rq1_skba.len; 675 int skb_arr_rq2_len = pr->rq2_skba.len; 676 int skb_arr_rq3_len = pr->rq3_skba.len; 677 int processed, processed_rq1, processed_rq2, processed_rq3; 678 u64 processed_bytes = 0; 679 int wqe_index, last_wqe_index, rq, port_reset; 680 681 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; 682 last_wqe_index = 0; 683 684 cqe = ehea_poll_rq1(qp, &wqe_index); 685 while ((processed < budget) && cqe) { 686 ehea_inc_rq1(qp); 687 processed_rq1++; 688 processed++; 689 if (netif_msg_rx_status(port)) 690 ehea_dump(cqe, sizeof(*cqe), "CQE"); 691 692 last_wqe_index = wqe_index; 693 rmb(); 694 if (!ehea_check_cqe(cqe, &rq)) { 695 if (rq == 1) { 696 /* LL RQ1 */ 697 skb = get_skb_by_index_ll(skb_arr_rq1, 698 skb_arr_rq1_len, 699 wqe_index); 700 if (unlikely(!skb)) { 701 netif_info(port, rx_err, dev, 702 "LL rq1: skb=NULL\n"); 703 704 skb = netdev_alloc_skb(dev, 705 EHEA_L_PKT_SIZE); 706 if (!skb) 707 break; 708 } 709 skb_copy_to_linear_data(skb, ((char *)cqe) + 64, 710 cqe->num_bytes_transfered - 4); 711 ehea_fill_skb(dev, skb, cqe, pr); 712 } else if (rq == 2) { 713 /* RQ2 */ 714 skb = get_skb_by_index(skb_arr_rq2, 715 skb_arr_rq2_len, cqe); 716 if (unlikely(!skb)) { 717 netif_err(port, rx_err, dev, 718 "rq2: skb=NULL\n"); 719 break; 720 } 721 ehea_fill_skb(dev, skb, cqe, pr); 722 processed_rq2++; 723 } else { 724 /* RQ3 */ 725 skb = get_skb_by_index(skb_arr_rq3, 726 skb_arr_rq3_len, cqe); 727 if (unlikely(!skb)) { 728 netif_err(port, rx_err, dev, 729 "rq3: skb=NULL\n"); 730 break; 731 } 732 ehea_fill_skb(dev, skb, cqe, pr); 733 processed_rq3++; 734 } 735 736 processed_bytes += skb->len; 737 738 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 739 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 740 cqe->vlan_tag); 741 742 napi_gro_receive(&pr->napi, skb); 743 } else { 744 pr->p_stats.poll_receive_errors++; 745 port_reset = ehea_treat_poll_error(pr, rq, cqe, 746 &processed_rq2, 747 &processed_rq3); 748 if (port_reset) 749 break; 750 } 751 cqe = ehea_poll_rq1(qp, &wqe_index); 752 } 753 754 pr->rx_packets += processed; 755 pr->rx_bytes += processed_bytes; 756 757 ehea_refill_rq1(pr, last_wqe_index, processed_rq1); 758 ehea_refill_rq2(pr, processed_rq2); 759 ehea_refill_rq3(pr, processed_rq3); 760 761 return processed; 762 } 763 764 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull 765 766 static void reset_sq_restart_flag(struct ehea_port *port) 767 { 768 int i; 769 770 for (i = 0; i < port->num_def_qps; i++) { 771 struct ehea_port_res *pr = &port->port_res[i]; 772 pr->sq_restart_flag = 0; 773 } 774 wake_up(&port->restart_wq); 775 } 776 777 static void check_sqs(struct ehea_port *port) 778 { 779 struct ehea_swqe *swqe; 780 int swqe_index; 781 int i, k; 782 783 for (i = 0; i < port->num_def_qps; i++) { 784 struct ehea_port_res *pr = &port->port_res[i]; 785 int ret; 786 k = 0; 787 swqe = ehea_get_swqe(pr->qp, &swqe_index); 788 memset(swqe, 0, SWQE_HEADER_SIZE); 789 atomic_dec(&pr->swqe_avail); 790 791 swqe->tx_control |= EHEA_SWQE_PURGE; 792 swqe->wr_id = SWQE_RESTART_CHECK; 793 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 794 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; 795 swqe->immediate_data_length = 80; 796 797 ehea_post_swqe(pr->qp, swqe); 798 799 ret = wait_event_timeout(port->restart_wq, 800 pr->sq_restart_flag == 0, 801 msecs_to_jiffies(100)); 802 803 if (!ret) { 804 pr_err("HW/SW queues out of sync\n"); 805 ehea_schedule_port_reset(pr->port); 806 return; 807 } 808 } 809 } 810 811 812 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) 813 { 814 struct sk_buff *skb; 815 struct ehea_cq *send_cq = pr->send_cq; 816 struct ehea_cqe *cqe; 817 int quota = my_quota; 818 int cqe_counter = 0; 819 int swqe_av = 0; 820 int index; 821 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, 822 pr - &pr->port->port_res[0]); 823 824 cqe = ehea_poll_cq(send_cq); 825 while (cqe && (quota > 0)) { 826 ehea_inc_cq(send_cq); 827 828 cqe_counter++; 829 rmb(); 830 831 if (cqe->wr_id == SWQE_RESTART_CHECK) { 832 pr->sq_restart_flag = 1; 833 swqe_av++; 834 break; 835 } 836 837 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { 838 pr_err("Bad send completion status=0x%04X\n", 839 cqe->status); 840 841 if (netif_msg_tx_err(pr->port)) 842 ehea_dump(cqe, sizeof(*cqe), "Send CQE"); 843 844 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { 845 pr_err("Resetting port\n"); 846 ehea_schedule_port_reset(pr->port); 847 break; 848 } 849 } 850 851 if (netif_msg_tx_done(pr->port)) 852 ehea_dump(cqe, sizeof(*cqe), "CQE"); 853 854 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) 855 == EHEA_SWQE2_TYPE)) { 856 857 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 858 skb = pr->sq_skba.arr[index]; 859 dev_consume_skb_any(skb); 860 pr->sq_skba.arr[index] = NULL; 861 } 862 863 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); 864 quota--; 865 866 cqe = ehea_poll_cq(send_cq); 867 } 868 869 ehea_update_feca(send_cq, cqe_counter); 870 atomic_add(swqe_av, &pr->swqe_avail); 871 872 if (unlikely(netif_tx_queue_stopped(txq) && 873 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { 874 __netif_tx_lock(txq, smp_processor_id()); 875 if (netif_tx_queue_stopped(txq) && 876 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) 877 netif_tx_wake_queue(txq); 878 __netif_tx_unlock(txq); 879 } 880 881 wake_up(&pr->port->swqe_avail_wq); 882 883 return cqe; 884 } 885 886 #define EHEA_POLL_MAX_CQES 65535 887 888 static int ehea_poll(struct napi_struct *napi, int budget) 889 { 890 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, 891 napi); 892 struct net_device *dev = pr->port->netdev; 893 struct ehea_cqe *cqe; 894 struct ehea_cqe *cqe_skb = NULL; 895 int wqe_index; 896 int rx = 0; 897 898 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 899 rx += ehea_proc_rwqes(dev, pr, budget - rx); 900 901 while (rx != budget) { 902 napi_complete(napi); 903 ehea_reset_cq_ep(pr->recv_cq); 904 ehea_reset_cq_ep(pr->send_cq); 905 ehea_reset_cq_n1(pr->recv_cq); 906 ehea_reset_cq_n1(pr->send_cq); 907 rmb(); 908 cqe = ehea_poll_rq1(pr->qp, &wqe_index); 909 cqe_skb = ehea_poll_cq(pr->send_cq); 910 911 if (!cqe && !cqe_skb) 912 return rx; 913 914 if (!napi_reschedule(napi)) 915 return rx; 916 917 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 918 rx += ehea_proc_rwqes(dev, pr, budget - rx); 919 } 920 921 return rx; 922 } 923 924 static irqreturn_t ehea_recv_irq_handler(int irq, void *param) 925 { 926 struct ehea_port_res *pr = param; 927 928 napi_schedule(&pr->napi); 929 930 return IRQ_HANDLED; 931 } 932 933 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) 934 { 935 struct ehea_port *port = param; 936 struct ehea_eqe *eqe; 937 struct ehea_qp *qp; 938 u32 qp_token; 939 u64 resource_type, aer, aerr; 940 int reset_port = 0; 941 942 eqe = ehea_poll_eq(port->qp_eq); 943 944 while (eqe) { 945 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); 946 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", 947 eqe->entry, qp_token); 948 949 qp = port->port_res[qp_token].qp; 950 951 resource_type = ehea_error_data(port->adapter, qp->fw_handle, 952 &aer, &aerr); 953 954 if (resource_type == EHEA_AER_RESTYPE_QP) { 955 if ((aer & EHEA_AER_RESET_MASK) || 956 (aerr & EHEA_AERR_RESET_MASK)) 957 reset_port = 1; 958 } else 959 reset_port = 1; /* Reset in case of CQ or EQ error */ 960 961 eqe = ehea_poll_eq(port->qp_eq); 962 } 963 964 if (reset_port) { 965 pr_err("Resetting port\n"); 966 ehea_schedule_port_reset(port); 967 } 968 969 return IRQ_HANDLED; 970 } 971 972 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, 973 int logical_port) 974 { 975 int i; 976 977 for (i = 0; i < EHEA_MAX_PORTS; i++) 978 if (adapter->port[i]) 979 if (adapter->port[i]->logical_port_id == logical_port) 980 return adapter->port[i]; 981 return NULL; 982 } 983 984 int ehea_sense_port_attr(struct ehea_port *port) 985 { 986 int ret; 987 u64 hret; 988 struct hcp_ehea_port_cb0 *cb0; 989 990 /* may be called via ehea_neq_tasklet() */ 991 cb0 = (void *)get_zeroed_page(GFP_ATOMIC); 992 if (!cb0) { 993 pr_err("no mem for cb0\n"); 994 ret = -ENOMEM; 995 goto out; 996 } 997 998 hret = ehea_h_query_ehea_port(port->adapter->handle, 999 port->logical_port_id, H_PORT_CB0, 1000 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), 1001 cb0); 1002 if (hret != H_SUCCESS) { 1003 ret = -EIO; 1004 goto out_free; 1005 } 1006 1007 /* MAC address */ 1008 port->mac_addr = cb0->port_mac_addr << 16; 1009 1010 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { 1011 ret = -EADDRNOTAVAIL; 1012 goto out_free; 1013 } 1014 1015 /* Port speed */ 1016 switch (cb0->port_speed) { 1017 case H_SPEED_10M_H: 1018 port->port_speed = EHEA_SPEED_10M; 1019 port->full_duplex = 0; 1020 break; 1021 case H_SPEED_10M_F: 1022 port->port_speed = EHEA_SPEED_10M; 1023 port->full_duplex = 1; 1024 break; 1025 case H_SPEED_100M_H: 1026 port->port_speed = EHEA_SPEED_100M; 1027 port->full_duplex = 0; 1028 break; 1029 case H_SPEED_100M_F: 1030 port->port_speed = EHEA_SPEED_100M; 1031 port->full_duplex = 1; 1032 break; 1033 case H_SPEED_1G_F: 1034 port->port_speed = EHEA_SPEED_1G; 1035 port->full_duplex = 1; 1036 break; 1037 case H_SPEED_10G_F: 1038 port->port_speed = EHEA_SPEED_10G; 1039 port->full_duplex = 1; 1040 break; 1041 default: 1042 port->port_speed = 0; 1043 port->full_duplex = 0; 1044 break; 1045 } 1046 1047 port->autoneg = 1; 1048 port->num_mcs = cb0->num_default_qps; 1049 1050 /* Number of default QPs */ 1051 if (use_mcs) 1052 port->num_def_qps = cb0->num_default_qps; 1053 else 1054 port->num_def_qps = 1; 1055 1056 if (!port->num_def_qps) { 1057 ret = -EINVAL; 1058 goto out_free; 1059 } 1060 1061 ret = 0; 1062 out_free: 1063 if (ret || netif_msg_probe(port)) 1064 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); 1065 free_page((unsigned long)cb0); 1066 out: 1067 return ret; 1068 } 1069 1070 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) 1071 { 1072 struct hcp_ehea_port_cb4 *cb4; 1073 u64 hret; 1074 int ret = 0; 1075 1076 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 1077 if (!cb4) { 1078 pr_err("no mem for cb4\n"); 1079 ret = -ENOMEM; 1080 goto out; 1081 } 1082 1083 cb4->port_speed = port_speed; 1084 1085 netif_carrier_off(port->netdev); 1086 1087 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1088 port->logical_port_id, 1089 H_PORT_CB4, H_PORT_CB4_SPEED, cb4); 1090 if (hret == H_SUCCESS) { 1091 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; 1092 1093 hret = ehea_h_query_ehea_port(port->adapter->handle, 1094 port->logical_port_id, 1095 H_PORT_CB4, H_PORT_CB4_SPEED, 1096 cb4); 1097 if (hret == H_SUCCESS) { 1098 switch (cb4->port_speed) { 1099 case H_SPEED_10M_H: 1100 port->port_speed = EHEA_SPEED_10M; 1101 port->full_duplex = 0; 1102 break; 1103 case H_SPEED_10M_F: 1104 port->port_speed = EHEA_SPEED_10M; 1105 port->full_duplex = 1; 1106 break; 1107 case H_SPEED_100M_H: 1108 port->port_speed = EHEA_SPEED_100M; 1109 port->full_duplex = 0; 1110 break; 1111 case H_SPEED_100M_F: 1112 port->port_speed = EHEA_SPEED_100M; 1113 port->full_duplex = 1; 1114 break; 1115 case H_SPEED_1G_F: 1116 port->port_speed = EHEA_SPEED_1G; 1117 port->full_duplex = 1; 1118 break; 1119 case H_SPEED_10G_F: 1120 port->port_speed = EHEA_SPEED_10G; 1121 port->full_duplex = 1; 1122 break; 1123 default: 1124 port->port_speed = 0; 1125 port->full_duplex = 0; 1126 break; 1127 } 1128 } else { 1129 pr_err("Failed sensing port speed\n"); 1130 ret = -EIO; 1131 } 1132 } else { 1133 if (hret == H_AUTHORITY) { 1134 pr_info("Hypervisor denied setting port speed\n"); 1135 ret = -EPERM; 1136 } else { 1137 ret = -EIO; 1138 pr_err("Failed setting port speed\n"); 1139 } 1140 } 1141 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) 1142 netif_carrier_on(port->netdev); 1143 1144 free_page((unsigned long)cb4); 1145 out: 1146 return ret; 1147 } 1148 1149 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) 1150 { 1151 int ret; 1152 u8 ec; 1153 u8 portnum; 1154 struct ehea_port *port; 1155 struct net_device *dev; 1156 1157 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); 1158 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); 1159 port = ehea_get_port(adapter, portnum); 1160 if (!port) { 1161 netdev_err(NULL, "unknown portnum %x\n", portnum); 1162 return; 1163 } 1164 dev = port->netdev; 1165 1166 switch (ec) { 1167 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1168 1169 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1170 if (!netif_carrier_ok(dev)) { 1171 ret = ehea_sense_port_attr(port); 1172 if (ret) { 1173 netdev_err(dev, "failed resensing port attributes\n"); 1174 break; 1175 } 1176 1177 netif_info(port, link, dev, 1178 "Logical port up: %dMbps %s Duplex\n", 1179 port->port_speed, 1180 port->full_duplex == 1 ? 1181 "Full" : "Half"); 1182 1183 netif_carrier_on(dev); 1184 netif_wake_queue(dev); 1185 } 1186 } else 1187 if (netif_carrier_ok(dev)) { 1188 netif_info(port, link, dev, 1189 "Logical port down\n"); 1190 netif_carrier_off(dev); 1191 netif_tx_disable(dev); 1192 } 1193 1194 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1195 port->phy_link = EHEA_PHY_LINK_UP; 1196 netif_info(port, link, dev, 1197 "Physical port up\n"); 1198 if (prop_carrier_state) 1199 netif_carrier_on(dev); 1200 } else { 1201 port->phy_link = EHEA_PHY_LINK_DOWN; 1202 netif_info(port, link, dev, 1203 "Physical port down\n"); 1204 if (prop_carrier_state) 1205 netif_carrier_off(dev); 1206 } 1207 1208 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1209 netdev_info(dev, 1210 "External switch port is primary port\n"); 1211 else 1212 netdev_info(dev, 1213 "External switch port is backup port\n"); 1214 1215 break; 1216 case EHEA_EC_ADAPTER_MALFUNC: 1217 netdev_err(dev, "Adapter malfunction\n"); 1218 break; 1219 case EHEA_EC_PORT_MALFUNC: 1220 netdev_info(dev, "Port malfunction\n"); 1221 netif_carrier_off(dev); 1222 netif_tx_disable(dev); 1223 break; 1224 default: 1225 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1226 break; 1227 } 1228 } 1229 1230 static void ehea_neq_tasklet(unsigned long data) 1231 { 1232 struct ehea_adapter *adapter = (struct ehea_adapter *)data; 1233 struct ehea_eqe *eqe; 1234 u64 event_mask; 1235 1236 eqe = ehea_poll_eq(adapter->neq); 1237 pr_debug("eqe=%p\n", eqe); 1238 1239 while (eqe) { 1240 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1241 ehea_parse_eqe(adapter, eqe->entry); 1242 eqe = ehea_poll_eq(adapter->neq); 1243 pr_debug("next eqe=%p\n", eqe); 1244 } 1245 1246 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1247 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1248 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1249 1250 ehea_h_reset_events(adapter->handle, 1251 adapter->neq->fw_handle, event_mask); 1252 } 1253 1254 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1255 { 1256 struct ehea_adapter *adapter = param; 1257 tasklet_hi_schedule(&adapter->neq_tasklet); 1258 return IRQ_HANDLED; 1259 } 1260 1261 1262 static int ehea_fill_port_res(struct ehea_port_res *pr) 1263 { 1264 int ret; 1265 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1266 1267 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1268 1269 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1270 1271 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1272 1273 return ret; 1274 } 1275 1276 static int ehea_reg_interrupts(struct net_device *dev) 1277 { 1278 struct ehea_port *port = netdev_priv(dev); 1279 struct ehea_port_res *pr; 1280 int i, ret; 1281 1282 1283 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1284 dev->name); 1285 1286 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1287 ehea_qp_aff_irq_handler, 1288 0, port->int_aff_name, port); 1289 if (ret) { 1290 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1291 port->qp_eq->attr.ist1); 1292 goto out_free_qpeq; 1293 } 1294 1295 netif_info(port, ifup, dev, 1296 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1297 port->qp_eq->attr.ist1); 1298 1299 1300 for (i = 0; i < port->num_def_qps; i++) { 1301 pr = &port->port_res[i]; 1302 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1303 "%s-queue%d", dev->name, i); 1304 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1305 ehea_recv_irq_handler, 1306 0, pr->int_send_name, pr); 1307 if (ret) { 1308 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1309 i, pr->eq->attr.ist1); 1310 goto out_free_req; 1311 } 1312 netif_info(port, ifup, dev, 1313 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1314 pr->eq->attr.ist1, i); 1315 } 1316 out: 1317 return ret; 1318 1319 1320 out_free_req: 1321 while (--i >= 0) { 1322 u32 ist = port->port_res[i].eq->attr.ist1; 1323 ibmebus_free_irq(ist, &port->port_res[i]); 1324 } 1325 1326 out_free_qpeq: 1327 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1328 i = port->num_def_qps; 1329 1330 goto out; 1331 1332 } 1333 1334 static void ehea_free_interrupts(struct net_device *dev) 1335 { 1336 struct ehea_port *port = netdev_priv(dev); 1337 struct ehea_port_res *pr; 1338 int i; 1339 1340 /* send */ 1341 1342 for (i = 0; i < port->num_def_qps; i++) { 1343 pr = &port->port_res[i]; 1344 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1345 netif_info(port, intr, dev, 1346 "free send irq for res %d with handle 0x%X\n", 1347 i, pr->eq->attr.ist1); 1348 } 1349 1350 /* associated events */ 1351 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1352 netif_info(port, intr, dev, 1353 "associated event interrupt for handle 0x%X freed\n", 1354 port->qp_eq->attr.ist1); 1355 } 1356 1357 static int ehea_configure_port(struct ehea_port *port) 1358 { 1359 int ret, i; 1360 u64 hret, mask; 1361 struct hcp_ehea_port_cb0 *cb0; 1362 1363 ret = -ENOMEM; 1364 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1365 if (!cb0) 1366 goto out; 1367 1368 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1369 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1370 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1371 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1372 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1373 PXLY_RC_VLAN_FILTER) 1374 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1375 1376 for (i = 0; i < port->num_mcs; i++) 1377 if (use_mcs) 1378 cb0->default_qpn_arr[i] = 1379 port->port_res[i].qp->init_attr.qp_nr; 1380 else 1381 cb0->default_qpn_arr[i] = 1382 port->port_res[0].qp->init_attr.qp_nr; 1383 1384 if (netif_msg_ifup(port)) 1385 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1386 1387 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1388 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1389 1390 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1391 port->logical_port_id, 1392 H_PORT_CB0, mask, cb0); 1393 ret = -EIO; 1394 if (hret != H_SUCCESS) 1395 goto out_free; 1396 1397 ret = 0; 1398 1399 out_free: 1400 free_page((unsigned long)cb0); 1401 out: 1402 return ret; 1403 } 1404 1405 static int ehea_gen_smrs(struct ehea_port_res *pr) 1406 { 1407 int ret; 1408 struct ehea_adapter *adapter = pr->port->adapter; 1409 1410 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1411 if (ret) 1412 goto out; 1413 1414 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1415 if (ret) 1416 goto out_free; 1417 1418 return 0; 1419 1420 out_free: 1421 ehea_rem_mr(&pr->send_mr); 1422 out: 1423 pr_err("Generating SMRS failed\n"); 1424 return -EIO; 1425 } 1426 1427 static int ehea_rem_smrs(struct ehea_port_res *pr) 1428 { 1429 if ((ehea_rem_mr(&pr->send_mr)) || 1430 (ehea_rem_mr(&pr->recv_mr))) 1431 return -EIO; 1432 else 1433 return 0; 1434 } 1435 1436 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1437 { 1438 int arr_size = sizeof(void *) * max_q_entries; 1439 1440 q_skba->arr = vzalloc(arr_size); 1441 if (!q_skba->arr) 1442 return -ENOMEM; 1443 1444 q_skba->len = max_q_entries; 1445 q_skba->index = 0; 1446 q_skba->os_skbs = 0; 1447 1448 return 0; 1449 } 1450 1451 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1452 struct port_res_cfg *pr_cfg, int queue_token) 1453 { 1454 struct ehea_adapter *adapter = port->adapter; 1455 enum ehea_eq_type eq_type = EHEA_EQ; 1456 struct ehea_qp_init_attr *init_attr = NULL; 1457 int ret = -EIO; 1458 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1459 1460 tx_bytes = pr->tx_bytes; 1461 tx_packets = pr->tx_packets; 1462 rx_bytes = pr->rx_bytes; 1463 rx_packets = pr->rx_packets; 1464 1465 memset(pr, 0, sizeof(struct ehea_port_res)); 1466 1467 pr->tx_bytes = rx_bytes; 1468 pr->tx_packets = tx_packets; 1469 pr->rx_bytes = rx_bytes; 1470 pr->rx_packets = rx_packets; 1471 1472 pr->port = port; 1473 1474 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1475 if (!pr->eq) { 1476 pr_err("create_eq failed (eq)\n"); 1477 goto out_free; 1478 } 1479 1480 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1481 pr->eq->fw_handle, 1482 port->logical_port_id); 1483 if (!pr->recv_cq) { 1484 pr_err("create_cq failed (cq_recv)\n"); 1485 goto out_free; 1486 } 1487 1488 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1489 pr->eq->fw_handle, 1490 port->logical_port_id); 1491 if (!pr->send_cq) { 1492 pr_err("create_cq failed (cq_send)\n"); 1493 goto out_free; 1494 } 1495 1496 if (netif_msg_ifup(port)) 1497 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1498 pr->send_cq->attr.act_nr_of_cqes, 1499 pr->recv_cq->attr.act_nr_of_cqes); 1500 1501 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1502 if (!init_attr) { 1503 ret = -ENOMEM; 1504 pr_err("no mem for ehea_qp_init_attr\n"); 1505 goto out_free; 1506 } 1507 1508 init_attr->low_lat_rq1 = 1; 1509 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1510 init_attr->rq_count = 3; 1511 init_attr->qp_token = queue_token; 1512 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1513 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1514 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1515 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1516 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1517 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1518 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1519 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1520 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1521 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1522 init_attr->port_nr = port->logical_port_id; 1523 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1524 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1525 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1526 1527 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1528 if (!pr->qp) { 1529 pr_err("create_qp failed\n"); 1530 ret = -EIO; 1531 goto out_free; 1532 } 1533 1534 if (netif_msg_ifup(port)) 1535 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", 1536 init_attr->qp_nr, 1537 init_attr->act_nr_send_wqes, 1538 init_attr->act_nr_rwqes_rq1, 1539 init_attr->act_nr_rwqes_rq2, 1540 init_attr->act_nr_rwqes_rq3); 1541 1542 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1543 1544 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1545 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1546 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1547 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1548 if (ret) 1549 goto out_free; 1550 1551 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1552 if (ehea_gen_smrs(pr) != 0) { 1553 ret = -EIO; 1554 goto out_free; 1555 } 1556 1557 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1558 1559 kfree(init_attr); 1560 1561 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); 1562 1563 ret = 0; 1564 goto out; 1565 1566 out_free: 1567 kfree(init_attr); 1568 vfree(pr->sq_skba.arr); 1569 vfree(pr->rq1_skba.arr); 1570 vfree(pr->rq2_skba.arr); 1571 vfree(pr->rq3_skba.arr); 1572 ehea_destroy_qp(pr->qp); 1573 ehea_destroy_cq(pr->send_cq); 1574 ehea_destroy_cq(pr->recv_cq); 1575 ehea_destroy_eq(pr->eq); 1576 out: 1577 return ret; 1578 } 1579 1580 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1581 { 1582 int ret, i; 1583 1584 if (pr->qp) 1585 netif_napi_del(&pr->napi); 1586 1587 ret = ehea_destroy_qp(pr->qp); 1588 1589 if (!ret) { 1590 ehea_destroy_cq(pr->send_cq); 1591 ehea_destroy_cq(pr->recv_cq); 1592 ehea_destroy_eq(pr->eq); 1593 1594 for (i = 0; i < pr->rq1_skba.len; i++) 1595 if (pr->rq1_skba.arr[i]) 1596 dev_kfree_skb(pr->rq1_skba.arr[i]); 1597 1598 for (i = 0; i < pr->rq2_skba.len; i++) 1599 if (pr->rq2_skba.arr[i]) 1600 dev_kfree_skb(pr->rq2_skba.arr[i]); 1601 1602 for (i = 0; i < pr->rq3_skba.len; i++) 1603 if (pr->rq3_skba.arr[i]) 1604 dev_kfree_skb(pr->rq3_skba.arr[i]); 1605 1606 for (i = 0; i < pr->sq_skba.len; i++) 1607 if (pr->sq_skba.arr[i]) 1608 dev_kfree_skb(pr->sq_skba.arr[i]); 1609 1610 vfree(pr->rq1_skba.arr); 1611 vfree(pr->rq2_skba.arr); 1612 vfree(pr->rq3_skba.arr); 1613 vfree(pr->sq_skba.arr); 1614 ret = ehea_rem_smrs(pr); 1615 } 1616 return ret; 1617 } 1618 1619 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1620 u32 lkey) 1621 { 1622 int skb_data_size = skb_headlen(skb); 1623 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1624 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1625 unsigned int immediate_len = SWQE2_MAX_IMM; 1626 1627 swqe->descriptors = 0; 1628 1629 if (skb_is_gso(skb)) { 1630 swqe->tx_control |= EHEA_SWQE_TSO; 1631 swqe->mss = skb_shinfo(skb)->gso_size; 1632 /* 1633 * For TSO packets we only copy the headers into the 1634 * immediate area. 1635 */ 1636 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb); 1637 } 1638 1639 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1640 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1641 swqe->immediate_data_length = immediate_len; 1642 1643 if (skb_data_size > immediate_len) { 1644 sg1entry->l_key = lkey; 1645 sg1entry->len = skb_data_size - immediate_len; 1646 sg1entry->vaddr = 1647 ehea_map_vaddr(skb->data + immediate_len); 1648 swqe->descriptors++; 1649 } 1650 } else { 1651 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1652 swqe->immediate_data_length = skb_data_size; 1653 } 1654 } 1655 1656 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1657 struct ehea_swqe *swqe, u32 lkey) 1658 { 1659 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1660 skb_frag_t *frag; 1661 int nfrags, sg1entry_contains_frag_data, i; 1662 1663 nfrags = skb_shinfo(skb)->nr_frags; 1664 sg1entry = &swqe->u.immdata_desc.sg_entry; 1665 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1666 sg1entry_contains_frag_data = 0; 1667 1668 write_swqe2_immediate(skb, swqe, lkey); 1669 1670 /* write descriptors */ 1671 if (nfrags > 0) { 1672 if (swqe->descriptors == 0) { 1673 /* sg1entry not yet used */ 1674 frag = &skb_shinfo(skb)->frags[0]; 1675 1676 /* copy sg1entry data */ 1677 sg1entry->l_key = lkey; 1678 sg1entry->len = skb_frag_size(frag); 1679 sg1entry->vaddr = 1680 ehea_map_vaddr(skb_frag_address(frag)); 1681 swqe->descriptors++; 1682 sg1entry_contains_frag_data = 1; 1683 } 1684 1685 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1686 1687 frag = &skb_shinfo(skb)->frags[i]; 1688 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1689 1690 sgentry->l_key = lkey; 1691 sgentry->len = skb_frag_size(frag); 1692 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1693 swqe->descriptors++; 1694 } 1695 } 1696 } 1697 1698 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1699 { 1700 int ret = 0; 1701 u64 hret; 1702 u8 reg_type; 1703 1704 /* De/Register untagged packets */ 1705 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1706 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1707 port->logical_port_id, 1708 reg_type, port->mac_addr, 0, hcallid); 1709 if (hret != H_SUCCESS) { 1710 pr_err("%sregistering bc address failed (tagged)\n", 1711 hcallid == H_REG_BCMC ? "" : "de"); 1712 ret = -EIO; 1713 goto out_herr; 1714 } 1715 1716 /* De/Register VLAN packets */ 1717 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1718 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1719 port->logical_port_id, 1720 reg_type, port->mac_addr, 0, hcallid); 1721 if (hret != H_SUCCESS) { 1722 pr_err("%sregistering bc address failed (vlan)\n", 1723 hcallid == H_REG_BCMC ? "" : "de"); 1724 ret = -EIO; 1725 } 1726 out_herr: 1727 return ret; 1728 } 1729 1730 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1731 { 1732 struct ehea_port *port = netdev_priv(dev); 1733 struct sockaddr *mac_addr = sa; 1734 struct hcp_ehea_port_cb0 *cb0; 1735 int ret; 1736 u64 hret; 1737 1738 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1739 ret = -EADDRNOTAVAIL; 1740 goto out; 1741 } 1742 1743 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1744 if (!cb0) { 1745 pr_err("no mem for cb0\n"); 1746 ret = -ENOMEM; 1747 goto out; 1748 } 1749 1750 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1751 1752 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1753 1754 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1755 port->logical_port_id, H_PORT_CB0, 1756 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1757 if (hret != H_SUCCESS) { 1758 ret = -EIO; 1759 goto out_free; 1760 } 1761 1762 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); 1763 1764 /* Deregister old MAC in pHYP */ 1765 if (port->state == EHEA_PORT_UP) { 1766 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1767 if (ret) 1768 goto out_upregs; 1769 } 1770 1771 port->mac_addr = cb0->port_mac_addr << 16; 1772 1773 /* Register new MAC in pHYP */ 1774 if (port->state == EHEA_PORT_UP) { 1775 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1776 if (ret) 1777 goto out_upregs; 1778 } 1779 1780 ret = 0; 1781 1782 out_upregs: 1783 ehea_update_bcmc_registrations(); 1784 out_free: 1785 free_page((unsigned long)cb0); 1786 out: 1787 return ret; 1788 } 1789 1790 static void ehea_promiscuous_error(u64 hret, int enable) 1791 { 1792 if (hret == H_AUTHORITY) 1793 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1794 enable == 1 ? "en" : "dis"); 1795 else 1796 pr_err("failed %sabling promiscuous mode\n", 1797 enable == 1 ? "en" : "dis"); 1798 } 1799 1800 static void ehea_promiscuous(struct net_device *dev, int enable) 1801 { 1802 struct ehea_port *port = netdev_priv(dev); 1803 struct hcp_ehea_port_cb7 *cb7; 1804 u64 hret; 1805 1806 if (enable == port->promisc) 1807 return; 1808 1809 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1810 if (!cb7) { 1811 pr_err("no mem for cb7\n"); 1812 goto out; 1813 } 1814 1815 /* Modify Pxs_DUCQPN in CB7 */ 1816 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1817 1818 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1819 port->logical_port_id, 1820 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1821 if (hret) { 1822 ehea_promiscuous_error(hret, enable); 1823 goto out; 1824 } 1825 1826 port->promisc = enable; 1827 out: 1828 free_page((unsigned long)cb7); 1829 } 1830 1831 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1832 u32 hcallid) 1833 { 1834 u64 hret; 1835 u8 reg_type; 1836 1837 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; 1838 if (mc_mac_addr == 0) 1839 reg_type |= EHEA_BCMC_SCOPE_ALL; 1840 1841 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1842 port->logical_port_id, 1843 reg_type, mc_mac_addr, 0, hcallid); 1844 if (hret) 1845 goto out; 1846 1847 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL; 1848 if (mc_mac_addr == 0) 1849 reg_type |= EHEA_BCMC_SCOPE_ALL; 1850 1851 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1852 port->logical_port_id, 1853 reg_type, mc_mac_addr, 0, hcallid); 1854 out: 1855 return hret; 1856 } 1857 1858 static int ehea_drop_multicast_list(struct net_device *dev) 1859 { 1860 struct ehea_port *port = netdev_priv(dev); 1861 struct ehea_mc_list *mc_entry = port->mc_list; 1862 struct list_head *pos; 1863 struct list_head *temp; 1864 int ret = 0; 1865 u64 hret; 1866 1867 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1868 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1869 1870 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1871 H_DEREG_BCMC); 1872 if (hret) { 1873 pr_err("failed deregistering mcast MAC\n"); 1874 ret = -EIO; 1875 } 1876 1877 list_del(pos); 1878 kfree(mc_entry); 1879 } 1880 return ret; 1881 } 1882 1883 static void ehea_allmulti(struct net_device *dev, int enable) 1884 { 1885 struct ehea_port *port = netdev_priv(dev); 1886 u64 hret; 1887 1888 if (!port->allmulti) { 1889 if (enable) { 1890 /* Enable ALLMULTI */ 1891 ehea_drop_multicast_list(dev); 1892 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1893 if (!hret) 1894 port->allmulti = 1; 1895 else 1896 netdev_err(dev, 1897 "failed enabling IFF_ALLMULTI\n"); 1898 } 1899 } else { 1900 if (!enable) { 1901 /* Disable ALLMULTI */ 1902 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1903 if (!hret) 1904 port->allmulti = 0; 1905 else 1906 netdev_err(dev, 1907 "failed disabling IFF_ALLMULTI\n"); 1908 } 1909 } 1910 } 1911 1912 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1913 { 1914 struct ehea_mc_list *ehea_mcl_entry; 1915 u64 hret; 1916 1917 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1918 if (!ehea_mcl_entry) 1919 return; 1920 1921 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1922 1923 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1924 1925 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1926 H_REG_BCMC); 1927 if (!hret) 1928 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1929 else { 1930 pr_err("failed registering mcast MAC\n"); 1931 kfree(ehea_mcl_entry); 1932 } 1933 } 1934 1935 static void ehea_set_multicast_list(struct net_device *dev) 1936 { 1937 struct ehea_port *port = netdev_priv(dev); 1938 struct netdev_hw_addr *ha; 1939 int ret; 1940 1941 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC)); 1942 1943 if (dev->flags & IFF_ALLMULTI) { 1944 ehea_allmulti(dev, 1); 1945 goto out; 1946 } 1947 ehea_allmulti(dev, 0); 1948 1949 if (!netdev_mc_empty(dev)) { 1950 ret = ehea_drop_multicast_list(dev); 1951 if (ret) { 1952 /* Dropping the current multicast list failed. 1953 * Enabling ALL_MULTI is the best we can do. 1954 */ 1955 ehea_allmulti(dev, 1); 1956 } 1957 1958 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1959 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1960 port->adapter->max_mc_mac); 1961 goto out; 1962 } 1963 1964 netdev_for_each_mc_addr(ha, dev) 1965 ehea_add_multicast_entry(port, ha->addr); 1966 1967 } 1968 out: 1969 ehea_update_bcmc_registrations(); 1970 } 1971 1972 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1973 { 1974 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1975 1976 if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 1977 return; 1978 1979 if (skb->ip_summed == CHECKSUM_PARTIAL) 1980 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 1981 1982 swqe->ip_start = skb_network_offset(skb); 1983 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 1984 1985 switch (ip_hdr(skb)->protocol) { 1986 case IPPROTO_UDP: 1987 if (skb->ip_summed == CHECKSUM_PARTIAL) 1988 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1989 1990 swqe->tcp_offset = swqe->ip_end + 1 + 1991 offsetof(struct udphdr, check); 1992 break; 1993 1994 case IPPROTO_TCP: 1995 if (skb->ip_summed == CHECKSUM_PARTIAL) 1996 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1997 1998 swqe->tcp_offset = swqe->ip_end + 1 + 1999 offsetof(struct tcphdr, check); 2000 break; 2001 } 2002 } 2003 2004 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 2005 struct ehea_swqe *swqe, u32 lkey) 2006 { 2007 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 2008 2009 xmit_common(skb, swqe); 2010 2011 write_swqe2_data(skb, dev, swqe, lkey); 2012 } 2013 2014 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 2015 struct ehea_swqe *swqe) 2016 { 2017 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2018 2019 xmit_common(skb, swqe); 2020 2021 if (!skb->data_len) 2022 skb_copy_from_linear_data(skb, imm_data, skb->len); 2023 else 2024 skb_copy_bits(skb, 0, imm_data, skb->len); 2025 2026 swqe->immediate_data_length = skb->len; 2027 dev_consume_skb_any(skb); 2028 } 2029 2030 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2031 { 2032 struct ehea_port *port = netdev_priv(dev); 2033 struct ehea_swqe *swqe; 2034 u32 lkey; 2035 int swqe_index; 2036 struct ehea_port_res *pr; 2037 struct netdev_queue *txq; 2038 2039 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2040 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2041 2042 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2043 memset(swqe, 0, SWQE_HEADER_SIZE); 2044 atomic_dec(&pr->swqe_avail); 2045 2046 if (skb_vlan_tag_present(skb)) { 2047 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2048 swqe->vlan_tag = skb_vlan_tag_get(skb); 2049 } 2050 2051 pr->tx_packets++; 2052 pr->tx_bytes += skb->len; 2053 2054 if (skb->len <= SWQE3_MAX_IMM) { 2055 u32 sig_iv = port->sig_comp_iv; 2056 u32 swqe_num = pr->swqe_id_counter; 2057 ehea_xmit3(skb, dev, swqe); 2058 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2059 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2060 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2061 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2062 sig_iv); 2063 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2064 pr->swqe_ll_count = 0; 2065 } else 2066 pr->swqe_ll_count += 1; 2067 } else { 2068 swqe->wr_id = 2069 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2070 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2071 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2072 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2073 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2074 2075 pr->sq_skba.index++; 2076 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2077 2078 lkey = pr->send_mr.lkey; 2079 ehea_xmit2(skb, dev, swqe, lkey); 2080 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2081 } 2082 pr->swqe_id_counter += 1; 2083 2084 netif_info(port, tx_queued, dev, 2085 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2086 if (netif_msg_tx_queued(port)) 2087 ehea_dump(swqe, 512, "swqe"); 2088 2089 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2090 netif_tx_stop_queue(txq); 2091 swqe->tx_control |= EHEA_SWQE_PURGE; 2092 } 2093 2094 ehea_post_swqe(pr->qp, swqe); 2095 2096 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2097 pr->p_stats.queue_stopped++; 2098 netif_tx_stop_queue(txq); 2099 } 2100 2101 return NETDEV_TX_OK; 2102 } 2103 2104 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2105 { 2106 struct ehea_port *port = netdev_priv(dev); 2107 struct ehea_adapter *adapter = port->adapter; 2108 struct hcp_ehea_port_cb1 *cb1; 2109 int index; 2110 u64 hret; 2111 int err = 0; 2112 2113 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2114 if (!cb1) { 2115 pr_err("no mem for cb1\n"); 2116 err = -ENOMEM; 2117 goto out; 2118 } 2119 2120 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2121 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2122 if (hret != H_SUCCESS) { 2123 pr_err("query_ehea_port failed\n"); 2124 err = -EINVAL; 2125 goto out; 2126 } 2127 2128 index = (vid / 64); 2129 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2130 2131 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2132 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2133 if (hret != H_SUCCESS) { 2134 pr_err("modify_ehea_port failed\n"); 2135 err = -EINVAL; 2136 } 2137 out: 2138 free_page((unsigned long)cb1); 2139 return err; 2140 } 2141 2142 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2143 { 2144 struct ehea_port *port = netdev_priv(dev); 2145 struct ehea_adapter *adapter = port->adapter; 2146 struct hcp_ehea_port_cb1 *cb1; 2147 int index; 2148 u64 hret; 2149 int err = 0; 2150 2151 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2152 if (!cb1) { 2153 pr_err("no mem for cb1\n"); 2154 err = -ENOMEM; 2155 goto out; 2156 } 2157 2158 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2159 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2160 if (hret != H_SUCCESS) { 2161 pr_err("query_ehea_port failed\n"); 2162 err = -EINVAL; 2163 goto out; 2164 } 2165 2166 index = (vid / 64); 2167 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2168 2169 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2170 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2171 if (hret != H_SUCCESS) { 2172 pr_err("modify_ehea_port failed\n"); 2173 err = -EINVAL; 2174 } 2175 out: 2176 free_page((unsigned long)cb1); 2177 return err; 2178 } 2179 2180 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2181 { 2182 int ret = -EIO; 2183 u64 hret; 2184 u16 dummy16 = 0; 2185 u64 dummy64 = 0; 2186 struct hcp_modify_qp_cb0 *cb0; 2187 2188 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2189 if (!cb0) { 2190 ret = -ENOMEM; 2191 goto out; 2192 } 2193 2194 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2195 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2196 if (hret != H_SUCCESS) { 2197 pr_err("query_ehea_qp failed (1)\n"); 2198 goto out; 2199 } 2200 2201 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2202 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2203 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2204 &dummy64, &dummy64, &dummy16, &dummy16); 2205 if (hret != H_SUCCESS) { 2206 pr_err("modify_ehea_qp failed (1)\n"); 2207 goto out; 2208 } 2209 2210 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2211 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2212 if (hret != H_SUCCESS) { 2213 pr_err("query_ehea_qp failed (2)\n"); 2214 goto out; 2215 } 2216 2217 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2218 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2219 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2220 &dummy64, &dummy64, &dummy16, &dummy16); 2221 if (hret != H_SUCCESS) { 2222 pr_err("modify_ehea_qp failed (2)\n"); 2223 goto out; 2224 } 2225 2226 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2227 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2228 if (hret != H_SUCCESS) { 2229 pr_err("query_ehea_qp failed (3)\n"); 2230 goto out; 2231 } 2232 2233 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2234 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2235 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2236 &dummy64, &dummy64, &dummy16, &dummy16); 2237 if (hret != H_SUCCESS) { 2238 pr_err("modify_ehea_qp failed (3)\n"); 2239 goto out; 2240 } 2241 2242 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2243 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2244 if (hret != H_SUCCESS) { 2245 pr_err("query_ehea_qp failed (4)\n"); 2246 goto out; 2247 } 2248 2249 ret = 0; 2250 out: 2251 free_page((unsigned long)cb0); 2252 return ret; 2253 } 2254 2255 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2256 { 2257 int ret, i; 2258 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2259 enum ehea_eq_type eq_type = EHEA_EQ; 2260 2261 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2262 EHEA_MAX_ENTRIES_EQ, 1); 2263 if (!port->qp_eq) { 2264 ret = -EINVAL; 2265 pr_err("ehea_create_eq failed (qp_eq)\n"); 2266 goto out_kill_eq; 2267 } 2268 2269 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2270 pr_cfg.max_entries_scq = sq_entries * 2; 2271 pr_cfg.max_entries_sq = sq_entries; 2272 pr_cfg.max_entries_rq1 = rq1_entries; 2273 pr_cfg.max_entries_rq2 = rq2_entries; 2274 pr_cfg.max_entries_rq3 = rq3_entries; 2275 2276 pr_cfg_small_rx.max_entries_rcq = 1; 2277 pr_cfg_small_rx.max_entries_scq = sq_entries; 2278 pr_cfg_small_rx.max_entries_sq = sq_entries; 2279 pr_cfg_small_rx.max_entries_rq1 = 1; 2280 pr_cfg_small_rx.max_entries_rq2 = 1; 2281 pr_cfg_small_rx.max_entries_rq3 = 1; 2282 2283 for (i = 0; i < def_qps; i++) { 2284 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2285 if (ret) 2286 goto out_clean_pr; 2287 } 2288 for (i = def_qps; i < def_qps; i++) { 2289 ret = ehea_init_port_res(port, &port->port_res[i], 2290 &pr_cfg_small_rx, i); 2291 if (ret) 2292 goto out_clean_pr; 2293 } 2294 2295 return 0; 2296 2297 out_clean_pr: 2298 while (--i >= 0) 2299 ehea_clean_portres(port, &port->port_res[i]); 2300 2301 out_kill_eq: 2302 ehea_destroy_eq(port->qp_eq); 2303 return ret; 2304 } 2305 2306 static int ehea_clean_all_portres(struct ehea_port *port) 2307 { 2308 int ret = 0; 2309 int i; 2310 2311 for (i = 0; i < port->num_def_qps; i++) 2312 ret |= ehea_clean_portres(port, &port->port_res[i]); 2313 2314 ret |= ehea_destroy_eq(port->qp_eq); 2315 2316 return ret; 2317 } 2318 2319 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2320 { 2321 if (adapter->active_ports) 2322 return; 2323 2324 ehea_rem_mr(&adapter->mr); 2325 } 2326 2327 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2328 { 2329 if (adapter->active_ports) 2330 return 0; 2331 2332 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2333 } 2334 2335 static int ehea_up(struct net_device *dev) 2336 { 2337 int ret, i; 2338 struct ehea_port *port = netdev_priv(dev); 2339 2340 if (port->state == EHEA_PORT_UP) 2341 return 0; 2342 2343 ret = ehea_port_res_setup(port, port->num_def_qps); 2344 if (ret) { 2345 netdev_err(dev, "port_res_failed\n"); 2346 goto out; 2347 } 2348 2349 /* Set default QP for this port */ 2350 ret = ehea_configure_port(port); 2351 if (ret) { 2352 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2353 goto out_clean_pr; 2354 } 2355 2356 ret = ehea_reg_interrupts(dev); 2357 if (ret) { 2358 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2359 goto out_clean_pr; 2360 } 2361 2362 for (i = 0; i < port->num_def_qps; i++) { 2363 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2364 if (ret) { 2365 netdev_err(dev, "activate_qp failed\n"); 2366 goto out_free_irqs; 2367 } 2368 } 2369 2370 for (i = 0; i < port->num_def_qps; i++) { 2371 ret = ehea_fill_port_res(&port->port_res[i]); 2372 if (ret) { 2373 netdev_err(dev, "out_free_irqs\n"); 2374 goto out_free_irqs; 2375 } 2376 } 2377 2378 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2379 if (ret) { 2380 ret = -EIO; 2381 goto out_free_irqs; 2382 } 2383 2384 port->state = EHEA_PORT_UP; 2385 2386 ret = 0; 2387 goto out; 2388 2389 out_free_irqs: 2390 ehea_free_interrupts(dev); 2391 2392 out_clean_pr: 2393 ehea_clean_all_portres(port); 2394 out: 2395 if (ret) 2396 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2397 2398 ehea_update_bcmc_registrations(); 2399 ehea_update_firmware_handles(); 2400 2401 return ret; 2402 } 2403 2404 static void port_napi_disable(struct ehea_port *port) 2405 { 2406 int i; 2407 2408 for (i = 0; i < port->num_def_qps; i++) 2409 napi_disable(&port->port_res[i].napi); 2410 } 2411 2412 static void port_napi_enable(struct ehea_port *port) 2413 { 2414 int i; 2415 2416 for (i = 0; i < port->num_def_qps; i++) 2417 napi_enable(&port->port_res[i].napi); 2418 } 2419 2420 static int ehea_open(struct net_device *dev) 2421 { 2422 int ret; 2423 struct ehea_port *port = netdev_priv(dev); 2424 2425 mutex_lock(&port->port_lock); 2426 2427 netif_info(port, ifup, dev, "enabling port\n"); 2428 2429 netif_carrier_off(dev); 2430 2431 ret = ehea_up(dev); 2432 if (!ret) { 2433 port_napi_enable(port); 2434 netif_tx_start_all_queues(dev); 2435 } 2436 2437 mutex_unlock(&port->port_lock); 2438 schedule_delayed_work(&port->stats_work, 2439 round_jiffies_relative(msecs_to_jiffies(1000))); 2440 2441 return ret; 2442 } 2443 2444 static int ehea_down(struct net_device *dev) 2445 { 2446 int ret; 2447 struct ehea_port *port = netdev_priv(dev); 2448 2449 if (port->state == EHEA_PORT_DOWN) 2450 return 0; 2451 2452 ehea_drop_multicast_list(dev); 2453 ehea_allmulti(dev, 0); 2454 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2455 2456 ehea_free_interrupts(dev); 2457 2458 port->state = EHEA_PORT_DOWN; 2459 2460 ehea_update_bcmc_registrations(); 2461 2462 ret = ehea_clean_all_portres(port); 2463 if (ret) 2464 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2465 2466 ehea_update_firmware_handles(); 2467 2468 return ret; 2469 } 2470 2471 static int ehea_stop(struct net_device *dev) 2472 { 2473 int ret; 2474 struct ehea_port *port = netdev_priv(dev); 2475 2476 netif_info(port, ifdown, dev, "disabling port\n"); 2477 2478 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2479 cancel_work_sync(&port->reset_task); 2480 cancel_delayed_work_sync(&port->stats_work); 2481 mutex_lock(&port->port_lock); 2482 netif_tx_stop_all_queues(dev); 2483 port_napi_disable(port); 2484 ret = ehea_down(dev); 2485 mutex_unlock(&port->port_lock); 2486 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2487 return ret; 2488 } 2489 2490 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2491 { 2492 struct ehea_qp qp = *orig_qp; 2493 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2494 struct ehea_swqe *swqe; 2495 int wqe_index; 2496 int i; 2497 2498 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2499 swqe = ehea_get_swqe(&qp, &wqe_index); 2500 swqe->tx_control |= EHEA_SWQE_PURGE; 2501 } 2502 } 2503 2504 static void ehea_flush_sq(struct ehea_port *port) 2505 { 2506 int i; 2507 2508 for (i = 0; i < port->num_def_qps; i++) { 2509 struct ehea_port_res *pr = &port->port_res[i]; 2510 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2511 int ret; 2512 2513 ret = wait_event_timeout(port->swqe_avail_wq, 2514 atomic_read(&pr->swqe_avail) >= swqe_max, 2515 msecs_to_jiffies(100)); 2516 2517 if (!ret) { 2518 pr_err("WARNING: sq not flushed completely\n"); 2519 break; 2520 } 2521 } 2522 } 2523 2524 static int ehea_stop_qps(struct net_device *dev) 2525 { 2526 struct ehea_port *port = netdev_priv(dev); 2527 struct ehea_adapter *adapter = port->adapter; 2528 struct hcp_modify_qp_cb0 *cb0; 2529 int ret = -EIO; 2530 int dret; 2531 int i; 2532 u64 hret; 2533 u64 dummy64 = 0; 2534 u16 dummy16 = 0; 2535 2536 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2537 if (!cb0) { 2538 ret = -ENOMEM; 2539 goto out; 2540 } 2541 2542 for (i = 0; i < (port->num_def_qps); i++) { 2543 struct ehea_port_res *pr = &port->port_res[i]; 2544 struct ehea_qp *qp = pr->qp; 2545 2546 /* Purge send queue */ 2547 ehea_purge_sq(qp); 2548 2549 /* Disable queue pair */ 2550 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2551 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2552 cb0); 2553 if (hret != H_SUCCESS) { 2554 pr_err("query_ehea_qp failed (1)\n"); 2555 goto out; 2556 } 2557 2558 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2559 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2560 2561 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2562 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2563 1), cb0, &dummy64, 2564 &dummy64, &dummy16, &dummy16); 2565 if (hret != H_SUCCESS) { 2566 pr_err("modify_ehea_qp failed (1)\n"); 2567 goto out; 2568 } 2569 2570 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2571 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2572 cb0); 2573 if (hret != H_SUCCESS) { 2574 pr_err("query_ehea_qp failed (2)\n"); 2575 goto out; 2576 } 2577 2578 /* deregister shared memory regions */ 2579 dret = ehea_rem_smrs(pr); 2580 if (dret) { 2581 pr_err("unreg shared memory region failed\n"); 2582 goto out; 2583 } 2584 } 2585 2586 ret = 0; 2587 out: 2588 free_page((unsigned long)cb0); 2589 2590 return ret; 2591 } 2592 2593 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2594 { 2595 struct ehea_qp qp = *orig_qp; 2596 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2597 struct ehea_rwqe *rwqe; 2598 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2599 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2600 struct sk_buff *skb; 2601 u32 lkey = pr->recv_mr.lkey; 2602 2603 2604 int i; 2605 int index; 2606 2607 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2608 rwqe = ehea_get_next_rwqe(&qp, 2); 2609 rwqe->sg_list[0].l_key = lkey; 2610 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2611 skb = skba_rq2[index]; 2612 if (skb) 2613 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2614 } 2615 2616 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2617 rwqe = ehea_get_next_rwqe(&qp, 3); 2618 rwqe->sg_list[0].l_key = lkey; 2619 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2620 skb = skba_rq3[index]; 2621 if (skb) 2622 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2623 } 2624 } 2625 2626 static int ehea_restart_qps(struct net_device *dev) 2627 { 2628 struct ehea_port *port = netdev_priv(dev); 2629 struct ehea_adapter *adapter = port->adapter; 2630 int ret = 0; 2631 int i; 2632 2633 struct hcp_modify_qp_cb0 *cb0; 2634 u64 hret; 2635 u64 dummy64 = 0; 2636 u16 dummy16 = 0; 2637 2638 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2639 if (!cb0) { 2640 ret = -ENOMEM; 2641 goto out; 2642 } 2643 2644 for (i = 0; i < (port->num_def_qps); i++) { 2645 struct ehea_port_res *pr = &port->port_res[i]; 2646 struct ehea_qp *qp = pr->qp; 2647 2648 ret = ehea_gen_smrs(pr); 2649 if (ret) { 2650 netdev_err(dev, "creation of shared memory regions failed\n"); 2651 goto out; 2652 } 2653 2654 ehea_update_rqs(qp, pr); 2655 2656 /* Enable queue pair */ 2657 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2658 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2659 cb0); 2660 if (hret != H_SUCCESS) { 2661 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2662 goto out; 2663 } 2664 2665 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2666 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2667 2668 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2669 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2670 1), cb0, &dummy64, 2671 &dummy64, &dummy16, &dummy16); 2672 if (hret != H_SUCCESS) { 2673 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2674 goto out; 2675 } 2676 2677 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2678 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2679 cb0); 2680 if (hret != H_SUCCESS) { 2681 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2682 goto out; 2683 } 2684 2685 /* refill entire queue */ 2686 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2687 ehea_refill_rq2(pr, 0); 2688 ehea_refill_rq3(pr, 0); 2689 } 2690 out: 2691 free_page((unsigned long)cb0); 2692 2693 return ret; 2694 } 2695 2696 static void ehea_reset_port(struct work_struct *work) 2697 { 2698 int ret; 2699 struct ehea_port *port = 2700 container_of(work, struct ehea_port, reset_task); 2701 struct net_device *dev = port->netdev; 2702 2703 mutex_lock(&dlpar_mem_lock); 2704 port->resets++; 2705 mutex_lock(&port->port_lock); 2706 netif_tx_disable(dev); 2707 2708 port_napi_disable(port); 2709 2710 ehea_down(dev); 2711 2712 ret = ehea_up(dev); 2713 if (ret) 2714 goto out; 2715 2716 ehea_set_multicast_list(dev); 2717 2718 netif_info(port, timer, dev, "reset successful\n"); 2719 2720 port_napi_enable(port); 2721 2722 netif_tx_wake_all_queues(dev); 2723 out: 2724 mutex_unlock(&port->port_lock); 2725 mutex_unlock(&dlpar_mem_lock); 2726 } 2727 2728 static void ehea_rereg_mrs(void) 2729 { 2730 int ret, i; 2731 struct ehea_adapter *adapter; 2732 2733 pr_info("LPAR memory changed - re-initializing driver\n"); 2734 2735 list_for_each_entry(adapter, &adapter_list, list) 2736 if (adapter->active_ports) { 2737 /* Shutdown all ports */ 2738 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2739 struct ehea_port *port = adapter->port[i]; 2740 struct net_device *dev; 2741 2742 if (!port) 2743 continue; 2744 2745 dev = port->netdev; 2746 2747 if (dev->flags & IFF_UP) { 2748 mutex_lock(&port->port_lock); 2749 netif_tx_disable(dev); 2750 ehea_flush_sq(port); 2751 ret = ehea_stop_qps(dev); 2752 if (ret) { 2753 mutex_unlock(&port->port_lock); 2754 goto out; 2755 } 2756 port_napi_disable(port); 2757 mutex_unlock(&port->port_lock); 2758 } 2759 reset_sq_restart_flag(port); 2760 } 2761 2762 /* Unregister old memory region */ 2763 ret = ehea_rem_mr(&adapter->mr); 2764 if (ret) { 2765 pr_err("unregister MR failed - driver inoperable!\n"); 2766 goto out; 2767 } 2768 } 2769 2770 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2771 2772 list_for_each_entry(adapter, &adapter_list, list) 2773 if (adapter->active_ports) { 2774 /* Register new memory region */ 2775 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2776 if (ret) { 2777 pr_err("register MR failed - driver inoperable!\n"); 2778 goto out; 2779 } 2780 2781 /* Restart all ports */ 2782 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2783 struct ehea_port *port = adapter->port[i]; 2784 2785 if (port) { 2786 struct net_device *dev = port->netdev; 2787 2788 if (dev->flags & IFF_UP) { 2789 mutex_lock(&port->port_lock); 2790 ret = ehea_restart_qps(dev); 2791 if (!ret) { 2792 check_sqs(port); 2793 port_napi_enable(port); 2794 netif_tx_wake_all_queues(dev); 2795 } else { 2796 netdev_err(dev, "Unable to restart QPS\n"); 2797 } 2798 mutex_unlock(&port->port_lock); 2799 } 2800 } 2801 } 2802 } 2803 pr_info("re-initializing driver complete\n"); 2804 out: 2805 return; 2806 } 2807 2808 static void ehea_tx_watchdog(struct net_device *dev) 2809 { 2810 struct ehea_port *port = netdev_priv(dev); 2811 2812 if (netif_carrier_ok(dev) && 2813 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2814 ehea_schedule_port_reset(port); 2815 } 2816 2817 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2818 { 2819 struct hcp_query_ehea *cb; 2820 u64 hret; 2821 int ret; 2822 2823 cb = (void *)get_zeroed_page(GFP_KERNEL); 2824 if (!cb) { 2825 ret = -ENOMEM; 2826 goto out; 2827 } 2828 2829 hret = ehea_h_query_ehea(adapter->handle, cb); 2830 2831 if (hret != H_SUCCESS) { 2832 ret = -EIO; 2833 goto out_herr; 2834 } 2835 2836 adapter->max_mc_mac = cb->max_mc_mac - 1; 2837 ret = 0; 2838 2839 out_herr: 2840 free_page((unsigned long)cb); 2841 out: 2842 return ret; 2843 } 2844 2845 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2846 { 2847 struct hcp_ehea_port_cb4 *cb4; 2848 u64 hret; 2849 int ret = 0; 2850 2851 *jumbo = 0; 2852 2853 /* (Try to) enable *jumbo frames */ 2854 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2855 if (!cb4) { 2856 pr_err("no mem for cb4\n"); 2857 ret = -ENOMEM; 2858 goto out; 2859 } else { 2860 hret = ehea_h_query_ehea_port(port->adapter->handle, 2861 port->logical_port_id, 2862 H_PORT_CB4, 2863 H_PORT_CB4_JUMBO, cb4); 2864 if (hret == H_SUCCESS) { 2865 if (cb4->jumbo_frame) 2866 *jumbo = 1; 2867 else { 2868 cb4->jumbo_frame = 1; 2869 hret = ehea_h_modify_ehea_port(port->adapter-> 2870 handle, 2871 port-> 2872 logical_port_id, 2873 H_PORT_CB4, 2874 H_PORT_CB4_JUMBO, 2875 cb4); 2876 if (hret == H_SUCCESS) 2877 *jumbo = 1; 2878 } 2879 } else 2880 ret = -EINVAL; 2881 2882 free_page((unsigned long)cb4); 2883 } 2884 out: 2885 return ret; 2886 } 2887 2888 static ssize_t ehea_show_port_id(struct device *dev, 2889 struct device_attribute *attr, char *buf) 2890 { 2891 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2892 return sprintf(buf, "%d", port->logical_port_id); 2893 } 2894 2895 static DEVICE_ATTR(log_port_id, 0444, ehea_show_port_id, NULL); 2896 2897 static void logical_port_release(struct device *dev) 2898 { 2899 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2900 of_node_put(port->ofdev.dev.of_node); 2901 } 2902 2903 static struct device *ehea_register_port(struct ehea_port *port, 2904 struct device_node *dn) 2905 { 2906 int ret; 2907 2908 port->ofdev.dev.of_node = of_node_get(dn); 2909 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2910 port->ofdev.dev.bus = &ibmebus_bus_type; 2911 2912 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2913 port->ofdev.dev.release = logical_port_release; 2914 2915 ret = of_device_register(&port->ofdev); 2916 if (ret) { 2917 pr_err("failed to register device. ret=%d\n", ret); 2918 goto out; 2919 } 2920 2921 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2922 if (ret) { 2923 pr_err("failed to register attributes, ret=%d\n", ret); 2924 goto out_unreg_of_dev; 2925 } 2926 2927 return &port->ofdev.dev; 2928 2929 out_unreg_of_dev: 2930 of_device_unregister(&port->ofdev); 2931 out: 2932 return NULL; 2933 } 2934 2935 static void ehea_unregister_port(struct ehea_port *port) 2936 { 2937 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2938 of_device_unregister(&port->ofdev); 2939 } 2940 2941 static const struct net_device_ops ehea_netdev_ops = { 2942 .ndo_open = ehea_open, 2943 .ndo_stop = ehea_stop, 2944 .ndo_start_xmit = ehea_start_xmit, 2945 .ndo_get_stats64 = ehea_get_stats64, 2946 .ndo_set_mac_address = ehea_set_mac_addr, 2947 .ndo_validate_addr = eth_validate_addr, 2948 .ndo_set_rx_mode = ehea_set_multicast_list, 2949 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2950 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2951 .ndo_tx_timeout = ehea_tx_watchdog, 2952 }; 2953 2954 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2955 u32 logical_port_id, 2956 struct device_node *dn) 2957 { 2958 int ret; 2959 struct net_device *dev; 2960 struct ehea_port *port; 2961 struct device *port_dev; 2962 int jumbo; 2963 2964 /* allocate memory for the port structures */ 2965 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2966 2967 if (!dev) { 2968 ret = -ENOMEM; 2969 goto out_err; 2970 } 2971 2972 port = netdev_priv(dev); 2973 2974 mutex_init(&port->port_lock); 2975 port->state = EHEA_PORT_DOWN; 2976 port->sig_comp_iv = sq_entries / 10; 2977 2978 port->adapter = adapter; 2979 port->netdev = dev; 2980 port->logical_port_id = logical_port_id; 2981 2982 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 2983 2984 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 2985 if (!port->mc_list) { 2986 ret = -ENOMEM; 2987 goto out_free_ethdev; 2988 } 2989 2990 INIT_LIST_HEAD(&port->mc_list->list); 2991 2992 ret = ehea_sense_port_attr(port); 2993 if (ret) 2994 goto out_free_mc_list; 2995 2996 netif_set_real_num_rx_queues(dev, port->num_def_qps); 2997 netif_set_real_num_tx_queues(dev, port->num_def_qps); 2998 2999 port_dev = ehea_register_port(port, dn); 3000 if (!port_dev) 3001 goto out_free_mc_list; 3002 3003 SET_NETDEV_DEV(dev, port_dev); 3004 3005 /* initialize net_device structure */ 3006 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); 3007 3008 dev->netdev_ops = &ehea_netdev_ops; 3009 ehea_set_ethtool_ops(dev); 3010 3011 dev->hw_features = NETIF_F_SG | NETIF_F_TSO | 3012 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX; 3013 dev->features = NETIF_F_SG | NETIF_F_TSO | 3014 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | 3015 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 3016 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM; 3017 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3018 NETIF_F_IP_CSUM; 3019 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3020 3021 /* MTU range: 68 - 9022 */ 3022 dev->min_mtu = ETH_MIN_MTU; 3023 dev->max_mtu = EHEA_MAX_PACKET_SIZE; 3024 3025 INIT_WORK(&port->reset_task, ehea_reset_port); 3026 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3027 3028 init_waitqueue_head(&port->swqe_avail_wq); 3029 init_waitqueue_head(&port->restart_wq); 3030 3031 ret = register_netdev(dev); 3032 if (ret) { 3033 pr_err("register_netdev failed. ret=%d\n", ret); 3034 goto out_unreg_port; 3035 } 3036 3037 ret = ehea_get_jumboframe_status(port, &jumbo); 3038 if (ret) 3039 netdev_err(dev, "failed determining jumbo frame status\n"); 3040 3041 netdev_info(dev, "Jumbo frames are %sabled\n", 3042 jumbo == 1 ? "en" : "dis"); 3043 3044 adapter->active_ports++; 3045 3046 return port; 3047 3048 out_unreg_port: 3049 ehea_unregister_port(port); 3050 3051 out_free_mc_list: 3052 kfree(port->mc_list); 3053 3054 out_free_ethdev: 3055 free_netdev(dev); 3056 3057 out_err: 3058 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3059 logical_port_id, ret); 3060 return NULL; 3061 } 3062 3063 static void ehea_shutdown_single_port(struct ehea_port *port) 3064 { 3065 struct ehea_adapter *adapter = port->adapter; 3066 3067 cancel_work_sync(&port->reset_task); 3068 cancel_delayed_work_sync(&port->stats_work); 3069 unregister_netdev(port->netdev); 3070 ehea_unregister_port(port); 3071 kfree(port->mc_list); 3072 free_netdev(port->netdev); 3073 adapter->active_ports--; 3074 } 3075 3076 static int ehea_setup_ports(struct ehea_adapter *adapter) 3077 { 3078 struct device_node *lhea_dn; 3079 struct device_node *eth_dn = NULL; 3080 3081 const u32 *dn_log_port_id; 3082 int i = 0; 3083 3084 lhea_dn = adapter->ofdev->dev.of_node; 3085 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3086 3087 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3088 NULL); 3089 if (!dn_log_port_id) { 3090 pr_err("bad device node: eth_dn name=%pOF\n", eth_dn); 3091 continue; 3092 } 3093 3094 if (ehea_add_adapter_mr(adapter)) { 3095 pr_err("creating MR failed\n"); 3096 of_node_put(eth_dn); 3097 return -EIO; 3098 } 3099 3100 adapter->port[i] = ehea_setup_single_port(adapter, 3101 *dn_log_port_id, 3102 eth_dn); 3103 if (adapter->port[i]) 3104 netdev_info(adapter->port[i]->netdev, 3105 "logical port id #%d\n", *dn_log_port_id); 3106 else 3107 ehea_remove_adapter_mr(adapter); 3108 3109 i++; 3110 } 3111 return 0; 3112 } 3113 3114 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3115 u32 logical_port_id) 3116 { 3117 struct device_node *lhea_dn; 3118 struct device_node *eth_dn = NULL; 3119 const u32 *dn_log_port_id; 3120 3121 lhea_dn = adapter->ofdev->dev.of_node; 3122 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3123 3124 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3125 NULL); 3126 if (dn_log_port_id) 3127 if (*dn_log_port_id == logical_port_id) 3128 return eth_dn; 3129 } 3130 3131 return NULL; 3132 } 3133 3134 static ssize_t ehea_probe_port(struct device *dev, 3135 struct device_attribute *attr, 3136 const char *buf, size_t count) 3137 { 3138 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3139 struct ehea_port *port; 3140 struct device_node *eth_dn = NULL; 3141 int i; 3142 3143 u32 logical_port_id; 3144 3145 sscanf(buf, "%d", &logical_port_id); 3146 3147 port = ehea_get_port(adapter, logical_port_id); 3148 3149 if (port) { 3150 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3151 logical_port_id); 3152 return -EINVAL; 3153 } 3154 3155 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3156 3157 if (!eth_dn) { 3158 pr_info("no logical port with id %d found\n", logical_port_id); 3159 return -EINVAL; 3160 } 3161 3162 if (ehea_add_adapter_mr(adapter)) { 3163 pr_err("creating MR failed\n"); 3164 return -EIO; 3165 } 3166 3167 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3168 3169 of_node_put(eth_dn); 3170 3171 if (port) { 3172 for (i = 0; i < EHEA_MAX_PORTS; i++) 3173 if (!adapter->port[i]) { 3174 adapter->port[i] = port; 3175 break; 3176 } 3177 3178 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3179 logical_port_id); 3180 } else { 3181 ehea_remove_adapter_mr(adapter); 3182 return -EIO; 3183 } 3184 3185 return (ssize_t) count; 3186 } 3187 3188 static ssize_t ehea_remove_port(struct device *dev, 3189 struct device_attribute *attr, 3190 const char *buf, size_t count) 3191 { 3192 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3193 struct ehea_port *port; 3194 int i; 3195 u32 logical_port_id; 3196 3197 sscanf(buf, "%d", &logical_port_id); 3198 3199 port = ehea_get_port(adapter, logical_port_id); 3200 3201 if (port) { 3202 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3203 logical_port_id); 3204 3205 ehea_shutdown_single_port(port); 3206 3207 for (i = 0; i < EHEA_MAX_PORTS; i++) 3208 if (adapter->port[i] == port) { 3209 adapter->port[i] = NULL; 3210 break; 3211 } 3212 } else { 3213 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3214 logical_port_id); 3215 return -EINVAL; 3216 } 3217 3218 ehea_remove_adapter_mr(adapter); 3219 3220 return (ssize_t) count; 3221 } 3222 3223 static DEVICE_ATTR(probe_port, 0200, NULL, ehea_probe_port); 3224 static DEVICE_ATTR(remove_port, 0200, NULL, ehea_remove_port); 3225 3226 static int ehea_create_device_sysfs(struct platform_device *dev) 3227 { 3228 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3229 if (ret) 3230 goto out; 3231 3232 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3233 out: 3234 return ret; 3235 } 3236 3237 static void ehea_remove_device_sysfs(struct platform_device *dev) 3238 { 3239 device_remove_file(&dev->dev, &dev_attr_probe_port); 3240 device_remove_file(&dev->dev, &dev_attr_remove_port); 3241 } 3242 3243 static int ehea_reboot_notifier(struct notifier_block *nb, 3244 unsigned long action, void *unused) 3245 { 3246 if (action == SYS_RESTART) { 3247 pr_info("Reboot: freeing all eHEA resources\n"); 3248 ibmebus_unregister_driver(&ehea_driver); 3249 } 3250 return NOTIFY_DONE; 3251 } 3252 3253 static struct notifier_block ehea_reboot_nb = { 3254 .notifier_call = ehea_reboot_notifier, 3255 }; 3256 3257 static int ehea_mem_notifier(struct notifier_block *nb, 3258 unsigned long action, void *data) 3259 { 3260 int ret = NOTIFY_BAD; 3261 struct memory_notify *arg = data; 3262 3263 mutex_lock(&dlpar_mem_lock); 3264 3265 switch (action) { 3266 case MEM_CANCEL_OFFLINE: 3267 pr_info("memory offlining canceled"); 3268 /* Fall through: re-add canceled memory block */ 3269 3270 case MEM_ONLINE: 3271 pr_info("memory is going online"); 3272 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3273 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3274 goto out_unlock; 3275 ehea_rereg_mrs(); 3276 break; 3277 3278 case MEM_GOING_OFFLINE: 3279 pr_info("memory is going offline"); 3280 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3281 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3282 goto out_unlock; 3283 ehea_rereg_mrs(); 3284 break; 3285 3286 default: 3287 break; 3288 } 3289 3290 ehea_update_firmware_handles(); 3291 ret = NOTIFY_OK; 3292 3293 out_unlock: 3294 mutex_unlock(&dlpar_mem_lock); 3295 return ret; 3296 } 3297 3298 static struct notifier_block ehea_mem_nb = { 3299 .notifier_call = ehea_mem_notifier, 3300 }; 3301 3302 static void ehea_crash_handler(void) 3303 { 3304 int i; 3305 3306 if (ehea_fw_handles.arr) 3307 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3308 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3309 ehea_fw_handles.arr[i].fwh, 3310 FORCE_FREE); 3311 3312 if (ehea_bcmc_regs.arr) 3313 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3314 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3315 ehea_bcmc_regs.arr[i].port_id, 3316 ehea_bcmc_regs.arr[i].reg_type, 3317 ehea_bcmc_regs.arr[i].macaddr, 3318 0, H_DEREG_BCMC); 3319 } 3320 3321 static atomic_t ehea_memory_hooks_registered; 3322 3323 /* Register memory hooks on probe of first adapter */ 3324 static int ehea_register_memory_hooks(void) 3325 { 3326 int ret = 0; 3327 3328 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1) 3329 return 0; 3330 3331 ret = ehea_create_busmap(); 3332 if (ret) { 3333 pr_info("ehea_create_busmap failed\n"); 3334 goto out; 3335 } 3336 3337 ret = register_reboot_notifier(&ehea_reboot_nb); 3338 if (ret) { 3339 pr_info("register_reboot_notifier failed\n"); 3340 goto out; 3341 } 3342 3343 ret = register_memory_notifier(&ehea_mem_nb); 3344 if (ret) { 3345 pr_info("register_memory_notifier failed\n"); 3346 goto out2; 3347 } 3348 3349 ret = crash_shutdown_register(ehea_crash_handler); 3350 if (ret) { 3351 pr_info("crash_shutdown_register failed\n"); 3352 goto out3; 3353 } 3354 3355 return 0; 3356 3357 out3: 3358 unregister_memory_notifier(&ehea_mem_nb); 3359 out2: 3360 unregister_reboot_notifier(&ehea_reboot_nb); 3361 out: 3362 atomic_dec(&ehea_memory_hooks_registered); 3363 return ret; 3364 } 3365 3366 static void ehea_unregister_memory_hooks(void) 3367 { 3368 /* Only remove the hooks if we've registered them */ 3369 if (atomic_read(&ehea_memory_hooks_registered) == 0) 3370 return; 3371 3372 unregister_reboot_notifier(&ehea_reboot_nb); 3373 if (crash_shutdown_unregister(ehea_crash_handler)) 3374 pr_info("failed unregistering crash handler\n"); 3375 unregister_memory_notifier(&ehea_mem_nb); 3376 } 3377 3378 static int ehea_probe_adapter(struct platform_device *dev) 3379 { 3380 struct ehea_adapter *adapter; 3381 const u64 *adapter_handle; 3382 int ret; 3383 int i; 3384 3385 ret = ehea_register_memory_hooks(); 3386 if (ret) 3387 return ret; 3388 3389 if (!dev || !dev->dev.of_node) { 3390 pr_err("Invalid ibmebus device probed\n"); 3391 return -EINVAL; 3392 } 3393 3394 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL); 3395 if (!adapter) { 3396 ret = -ENOMEM; 3397 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3398 goto out; 3399 } 3400 3401 list_add(&adapter->list, &adapter_list); 3402 3403 adapter->ofdev = dev; 3404 3405 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3406 NULL); 3407 if (adapter_handle) 3408 adapter->handle = *adapter_handle; 3409 3410 if (!adapter->handle) { 3411 dev_err(&dev->dev, "failed getting handle for adapter" 3412 " '%pOF'\n", dev->dev.of_node); 3413 ret = -ENODEV; 3414 goto out_free_ad; 3415 } 3416 3417 adapter->pd = EHEA_PD_ID; 3418 3419 platform_set_drvdata(dev, adapter); 3420 3421 3422 /* initialize adapter and ports */ 3423 /* get adapter properties */ 3424 ret = ehea_sense_adapter_attr(adapter); 3425 if (ret) { 3426 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3427 goto out_free_ad; 3428 } 3429 3430 adapter->neq = ehea_create_eq(adapter, 3431 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3432 if (!adapter->neq) { 3433 ret = -EIO; 3434 dev_err(&dev->dev, "NEQ creation failed\n"); 3435 goto out_free_ad; 3436 } 3437 3438 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, 3439 (unsigned long)adapter); 3440 3441 ret = ehea_create_device_sysfs(dev); 3442 if (ret) 3443 goto out_kill_eq; 3444 3445 ret = ehea_setup_ports(adapter); 3446 if (ret) { 3447 dev_err(&dev->dev, "setup_ports failed\n"); 3448 goto out_rem_dev_sysfs; 3449 } 3450 3451 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3452 ehea_interrupt_neq, 0, 3453 "ehea_neq", adapter); 3454 if (ret) { 3455 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3456 goto out_shutdown_ports; 3457 } 3458 3459 /* Handle any events that might be pending. */ 3460 tasklet_hi_schedule(&adapter->neq_tasklet); 3461 3462 ret = 0; 3463 goto out; 3464 3465 out_shutdown_ports: 3466 for (i = 0; i < EHEA_MAX_PORTS; i++) 3467 if (adapter->port[i]) { 3468 ehea_shutdown_single_port(adapter->port[i]); 3469 adapter->port[i] = NULL; 3470 } 3471 3472 out_rem_dev_sysfs: 3473 ehea_remove_device_sysfs(dev); 3474 3475 out_kill_eq: 3476 ehea_destroy_eq(adapter->neq); 3477 3478 out_free_ad: 3479 list_del(&adapter->list); 3480 3481 out: 3482 ehea_update_firmware_handles(); 3483 3484 return ret; 3485 } 3486 3487 static int ehea_remove(struct platform_device *dev) 3488 { 3489 struct ehea_adapter *adapter = platform_get_drvdata(dev); 3490 int i; 3491 3492 for (i = 0; i < EHEA_MAX_PORTS; i++) 3493 if (adapter->port[i]) { 3494 ehea_shutdown_single_port(adapter->port[i]); 3495 adapter->port[i] = NULL; 3496 } 3497 3498 ehea_remove_device_sysfs(dev); 3499 3500 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3501 tasklet_kill(&adapter->neq_tasklet); 3502 3503 ehea_destroy_eq(adapter->neq); 3504 ehea_remove_adapter_mr(adapter); 3505 list_del(&adapter->list); 3506 3507 ehea_update_firmware_handles(); 3508 3509 return 0; 3510 } 3511 3512 static int check_module_parm(void) 3513 { 3514 int ret = 0; 3515 3516 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3517 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3518 pr_info("Bad parameter: rq1_entries\n"); 3519 ret = -EINVAL; 3520 } 3521 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3522 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3523 pr_info("Bad parameter: rq2_entries\n"); 3524 ret = -EINVAL; 3525 } 3526 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3527 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3528 pr_info("Bad parameter: rq3_entries\n"); 3529 ret = -EINVAL; 3530 } 3531 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3532 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3533 pr_info("Bad parameter: sq_entries\n"); 3534 ret = -EINVAL; 3535 } 3536 3537 return ret; 3538 } 3539 3540 static ssize_t capabilities_show(struct device_driver *drv, char *buf) 3541 { 3542 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3543 } 3544 3545 static DRIVER_ATTR_RO(capabilities); 3546 3547 static int __init ehea_module_init(void) 3548 { 3549 int ret; 3550 3551 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3552 3553 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3554 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3555 3556 mutex_init(&ehea_fw_handles.lock); 3557 spin_lock_init(&ehea_bcmc_regs.lock); 3558 3559 ret = check_module_parm(); 3560 if (ret) 3561 goto out; 3562 3563 ret = ibmebus_register_driver(&ehea_driver); 3564 if (ret) { 3565 pr_err("failed registering eHEA device driver on ebus\n"); 3566 goto out; 3567 } 3568 3569 ret = driver_create_file(&ehea_driver.driver, 3570 &driver_attr_capabilities); 3571 if (ret) { 3572 pr_err("failed to register capabilities attribute, ret=%d\n", 3573 ret); 3574 goto out2; 3575 } 3576 3577 return ret; 3578 3579 out2: 3580 ibmebus_unregister_driver(&ehea_driver); 3581 out: 3582 return ret; 3583 } 3584 3585 static void __exit ehea_module_exit(void) 3586 { 3587 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3588 ibmebus_unregister_driver(&ehea_driver); 3589 ehea_unregister_memory_hooks(); 3590 kfree(ehea_fw_handles.arr); 3591 kfree(ehea_bcmc_regs.arr); 3592 ehea_destroy_busmap(); 3593 } 3594 3595 module_init(ehea_module_init); 3596 module_exit(ehea_module_exit); 3597