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