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