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