1 /* 2 * linux/drivers/net/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 struct ehea_fw_handle_array ehea_fw_handles; 98 struct ehea_bcmc_reg_array ehea_bcmc_regs; 99 100 101 static int __devinit ehea_probe_adapter(struct platform_device *dev, 102 const struct of_device_id *id); 103 104 static int __devexit 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 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_SCOPE_ALL | 294 EHEA_BCMC_MULTICAST | 295 EHEA_BCMC_UNTAGGED; 296 arr[i++].macaddr = mc_entry->macaddr; 297 298 arr[i].adh = adapter->handle; 299 arr[i].port_id = port->logical_port_id; 300 arr[i].reg_type = EHEA_BCMC_SCOPE_ALL | 301 EHEA_BCMC_MULTICAST | 302 EHEA_BCMC_VLANID_ALL; 303 arr[i++].macaddr = mc_entry->macaddr; 304 num_registrations -= 2; 305 } 306 } 307 } 308 309 out_update: 310 kfree(ehea_bcmc_regs.arr); 311 ehea_bcmc_regs.arr = arr; 312 ehea_bcmc_regs.num_entries = i; 313 out: 314 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags); 315 } 316 317 static struct rtnl_link_stats64 *ehea_get_stats64(struct net_device *dev, 318 struct rtnl_link_stats64 *stats) 319 { 320 struct ehea_port *port = netdev_priv(dev); 321 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0; 322 int i; 323 324 for (i = 0; i < port->num_def_qps; i++) { 325 rx_packets += port->port_res[i].rx_packets; 326 rx_bytes += port->port_res[i].rx_bytes; 327 } 328 329 for (i = 0; i < port->num_def_qps; i++) { 330 tx_packets += port->port_res[i].tx_packets; 331 tx_bytes += port->port_res[i].tx_bytes; 332 } 333 334 stats->tx_packets = tx_packets; 335 stats->rx_bytes = rx_bytes; 336 stats->tx_bytes = tx_bytes; 337 stats->rx_packets = rx_packets; 338 339 return &port->stats; 340 } 341 342 static void ehea_update_stats(struct work_struct *work) 343 { 344 struct ehea_port *port = 345 container_of(work, struct ehea_port, stats_work.work); 346 struct net_device *dev = port->netdev; 347 struct rtnl_link_stats64 *stats = &port->stats; 348 struct hcp_ehea_port_cb2 *cb2; 349 u64 hret; 350 351 cb2 = (void *)get_zeroed_page(GFP_KERNEL); 352 if (!cb2) { 353 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n"); 354 goto resched; 355 } 356 357 hret = ehea_h_query_ehea_port(port->adapter->handle, 358 port->logical_port_id, 359 H_PORT_CB2, H_PORT_CB2_ALL, cb2); 360 if (hret != H_SUCCESS) { 361 netdev_err(dev, "query_ehea_port failed\n"); 362 goto out_herr; 363 } 364 365 if (netif_msg_hw(port)) 366 ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); 367 368 stats->multicast = cb2->rxmcp; 369 stats->rx_errors = cb2->rxuerr; 370 371 out_herr: 372 free_page((unsigned long)cb2); 373 resched: 374 schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000)); 375 } 376 377 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) 378 { 379 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 380 struct net_device *dev = pr->port->netdev; 381 int max_index_mask = pr->rq1_skba.len - 1; 382 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; 383 int adder = 0; 384 int i; 385 386 pr->rq1_skba.os_skbs = 0; 387 388 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 389 if (nr_of_wqes > 0) 390 pr->rq1_skba.index = index; 391 pr->rq1_skba.os_skbs = fill_wqes; 392 return; 393 } 394 395 for (i = 0; i < fill_wqes; i++) { 396 if (!skb_arr_rq1[index]) { 397 skb_arr_rq1[index] = netdev_alloc_skb(dev, 398 EHEA_L_PKT_SIZE); 399 if (!skb_arr_rq1[index]) { 400 netdev_info(dev, "Unable to allocate enough skb in the array\n"); 401 pr->rq1_skba.os_skbs = fill_wqes - i; 402 break; 403 } 404 } 405 index--; 406 index &= max_index_mask; 407 adder++; 408 } 409 410 if (adder == 0) 411 return; 412 413 /* Ring doorbell */ 414 ehea_update_rq1a(pr->qp, adder); 415 } 416 417 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) 418 { 419 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 420 struct net_device *dev = pr->port->netdev; 421 int i; 422 423 if (nr_rq1a > pr->rq1_skba.len) { 424 netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); 425 return; 426 } 427 428 for (i = 0; i < nr_rq1a; i++) { 429 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); 430 if (!skb_arr_rq1[i]) { 431 netdev_info(dev, "Not enough memory to allocate skb array\n"); 432 break; 433 } 434 } 435 /* Ring doorbell */ 436 ehea_update_rq1a(pr->qp, i - 1); 437 } 438 439 static int ehea_refill_rq_def(struct ehea_port_res *pr, 440 struct ehea_q_skb_arr *q_skba, int rq_nr, 441 int num_wqes, int wqe_type, int packet_size) 442 { 443 struct net_device *dev = pr->port->netdev; 444 struct ehea_qp *qp = pr->qp; 445 struct sk_buff **skb_arr = q_skba->arr; 446 struct ehea_rwqe *rwqe; 447 int i, index, max_index_mask, fill_wqes; 448 int adder = 0; 449 int ret = 0; 450 451 fill_wqes = q_skba->os_skbs + num_wqes; 452 q_skba->os_skbs = 0; 453 454 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 455 q_skba->os_skbs = fill_wqes; 456 return ret; 457 } 458 459 index = q_skba->index; 460 max_index_mask = q_skba->len - 1; 461 for (i = 0; i < fill_wqes; i++) { 462 u64 tmp_addr; 463 struct sk_buff *skb; 464 465 skb = netdev_alloc_skb_ip_align(dev, packet_size); 466 if (!skb) { 467 q_skba->os_skbs = fill_wqes - i; 468 if (q_skba->os_skbs == q_skba->len - 2) { 469 netdev_info(pr->port->netdev, 470 "rq%i ran dry - no mem for skb\n", 471 rq_nr); 472 ret = -ENOMEM; 473 } 474 break; 475 } 476 477 skb_arr[index] = skb; 478 tmp_addr = ehea_map_vaddr(skb->data); 479 if (tmp_addr == -1) { 480 dev_kfree_skb(skb); 481 q_skba->os_skbs = fill_wqes - i; 482 ret = 0; 483 break; 484 } 485 486 rwqe = ehea_get_next_rwqe(qp, rq_nr); 487 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type) 488 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index); 489 rwqe->sg_list[0].l_key = pr->recv_mr.lkey; 490 rwqe->sg_list[0].vaddr = tmp_addr; 491 rwqe->sg_list[0].len = packet_size; 492 rwqe->data_segments = 1; 493 494 index++; 495 index &= max_index_mask; 496 adder++; 497 } 498 499 q_skba->index = index; 500 if (adder == 0) 501 goto out; 502 503 /* Ring doorbell */ 504 iosync(); 505 if (rq_nr == 2) 506 ehea_update_rq2a(pr->qp, adder); 507 else 508 ehea_update_rq3a(pr->qp, adder); 509 out: 510 return ret; 511 } 512 513 514 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) 515 { 516 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, 517 nr_of_wqes, EHEA_RWQE2_TYPE, 518 EHEA_RQ2_PKT_SIZE); 519 } 520 521 522 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) 523 { 524 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, 525 nr_of_wqes, EHEA_RWQE3_TYPE, 526 EHEA_MAX_PACKET_SIZE); 527 } 528 529 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) 530 { 531 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; 532 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) 533 return 0; 534 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && 535 (cqe->header_length == 0)) 536 return 0; 537 return -EINVAL; 538 } 539 540 static inline void ehea_fill_skb(struct net_device *dev, 541 struct sk_buff *skb, struct ehea_cqe *cqe, 542 struct ehea_port_res *pr) 543 { 544 int length = cqe->num_bytes_transfered - 4; /*remove CRC */ 545 546 skb_put(skb, length); 547 skb->protocol = eth_type_trans(skb, dev); 548 549 /* The packet was not an IPV4 packet so a complemented checksum was 550 calculated. The value is found in the Internet Checksum field. */ 551 if (cqe->status & EHEA_CQE_BLIND_CKSUM) { 552 skb->ip_summed = CHECKSUM_COMPLETE; 553 skb->csum = csum_unfold(~cqe->inet_checksum_value); 554 } else 555 skb->ip_summed = CHECKSUM_UNNECESSARY; 556 557 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]); 558 } 559 560 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, 561 int arr_len, 562 struct ehea_cqe *cqe) 563 { 564 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 565 struct sk_buff *skb; 566 void *pref; 567 int x; 568 569 x = skb_index + 1; 570 x &= (arr_len - 1); 571 572 pref = skb_array[x]; 573 if (pref) { 574 prefetchw(pref); 575 prefetchw(pref + EHEA_CACHE_LINE); 576 577 pref = (skb_array[x]->data); 578 prefetch(pref); 579 prefetch(pref + EHEA_CACHE_LINE); 580 prefetch(pref + EHEA_CACHE_LINE * 2); 581 prefetch(pref + EHEA_CACHE_LINE * 3); 582 } 583 584 skb = skb_array[skb_index]; 585 skb_array[skb_index] = NULL; 586 return skb; 587 } 588 589 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, 590 int arr_len, int wqe_index) 591 { 592 struct sk_buff *skb; 593 void *pref; 594 int x; 595 596 x = wqe_index + 1; 597 x &= (arr_len - 1); 598 599 pref = skb_array[x]; 600 if (pref) { 601 prefetchw(pref); 602 prefetchw(pref + EHEA_CACHE_LINE); 603 604 pref = (skb_array[x]->data); 605 prefetchw(pref); 606 prefetchw(pref + EHEA_CACHE_LINE); 607 } 608 609 skb = skb_array[wqe_index]; 610 skb_array[wqe_index] = NULL; 611 return skb; 612 } 613 614 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, 615 struct ehea_cqe *cqe, int *processed_rq2, 616 int *processed_rq3) 617 { 618 struct sk_buff *skb; 619 620 if (cqe->status & EHEA_CQE_STAT_ERR_TCP) 621 pr->p_stats.err_tcp_cksum++; 622 if (cqe->status & EHEA_CQE_STAT_ERR_IP) 623 pr->p_stats.err_ip_cksum++; 624 if (cqe->status & EHEA_CQE_STAT_ERR_CRC) 625 pr->p_stats.err_frame_crc++; 626 627 if (rq == 2) { 628 *processed_rq2 += 1; 629 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe); 630 dev_kfree_skb(skb); 631 } else if (rq == 3) { 632 *processed_rq3 += 1; 633 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe); 634 dev_kfree_skb(skb); 635 } 636 637 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) { 638 if (netif_msg_rx_err(pr->port)) { 639 pr_err("Critical receive error for QP %d. Resetting port.\n", 640 pr->qp->init_attr.qp_nr); 641 ehea_dump(cqe, sizeof(*cqe), "CQE"); 642 } 643 ehea_schedule_port_reset(pr->port); 644 return 1; 645 } 646 647 return 0; 648 } 649 650 static int ehea_proc_rwqes(struct net_device *dev, 651 struct ehea_port_res *pr, 652 int budget) 653 { 654 struct ehea_port *port = pr->port; 655 struct ehea_qp *qp = pr->qp; 656 struct ehea_cqe *cqe; 657 struct sk_buff *skb; 658 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 659 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; 660 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; 661 int skb_arr_rq1_len = pr->rq1_skba.len; 662 int skb_arr_rq2_len = pr->rq2_skba.len; 663 int skb_arr_rq3_len = pr->rq3_skba.len; 664 int processed, processed_rq1, processed_rq2, processed_rq3; 665 u64 processed_bytes = 0; 666 int wqe_index, last_wqe_index, rq, port_reset; 667 668 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; 669 last_wqe_index = 0; 670 671 cqe = ehea_poll_rq1(qp, &wqe_index); 672 while ((processed < budget) && cqe) { 673 ehea_inc_rq1(qp); 674 processed_rq1++; 675 processed++; 676 if (netif_msg_rx_status(port)) 677 ehea_dump(cqe, sizeof(*cqe), "CQE"); 678 679 last_wqe_index = wqe_index; 680 rmb(); 681 if (!ehea_check_cqe(cqe, &rq)) { 682 if (rq == 1) { 683 /* LL RQ1 */ 684 skb = get_skb_by_index_ll(skb_arr_rq1, 685 skb_arr_rq1_len, 686 wqe_index); 687 if (unlikely(!skb)) { 688 netif_info(port, rx_err, dev, 689 "LL rq1: skb=NULL\n"); 690 691 skb = netdev_alloc_skb(dev, 692 EHEA_L_PKT_SIZE); 693 if (!skb) { 694 netdev_err(dev, "Not enough memory to allocate skb\n"); 695 break; 696 } 697 } 698 skb_copy_to_linear_data(skb, ((char *)cqe) + 64, 699 cqe->num_bytes_transfered - 4); 700 ehea_fill_skb(dev, skb, cqe, pr); 701 } else if (rq == 2) { 702 /* RQ2 */ 703 skb = get_skb_by_index(skb_arr_rq2, 704 skb_arr_rq2_len, cqe); 705 if (unlikely(!skb)) { 706 netif_err(port, rx_err, dev, 707 "rq2: skb=NULL\n"); 708 break; 709 } 710 ehea_fill_skb(dev, skb, cqe, pr); 711 processed_rq2++; 712 } else { 713 /* RQ3 */ 714 skb = get_skb_by_index(skb_arr_rq3, 715 skb_arr_rq3_len, cqe); 716 if (unlikely(!skb)) { 717 netif_err(port, rx_err, dev, 718 "rq3: skb=NULL\n"); 719 break; 720 } 721 ehea_fill_skb(dev, skb, cqe, pr); 722 processed_rq3++; 723 } 724 725 processed_bytes += skb->len; 726 727 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 728 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag); 729 730 napi_gro_receive(&pr->napi, skb); 731 } else { 732 pr->p_stats.poll_receive_errors++; 733 port_reset = ehea_treat_poll_error(pr, rq, cqe, 734 &processed_rq2, 735 &processed_rq3); 736 if (port_reset) 737 break; 738 } 739 cqe = ehea_poll_rq1(qp, &wqe_index); 740 } 741 742 pr->rx_packets += processed; 743 pr->rx_bytes += processed_bytes; 744 745 ehea_refill_rq1(pr, last_wqe_index, processed_rq1); 746 ehea_refill_rq2(pr, processed_rq2); 747 ehea_refill_rq3(pr, processed_rq3); 748 749 return processed; 750 } 751 752 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull 753 754 static void reset_sq_restart_flag(struct ehea_port *port) 755 { 756 int i; 757 758 for (i = 0; i < port->num_def_qps; i++) { 759 struct ehea_port_res *pr = &port->port_res[i]; 760 pr->sq_restart_flag = 0; 761 } 762 wake_up(&port->restart_wq); 763 } 764 765 static void check_sqs(struct ehea_port *port) 766 { 767 struct ehea_swqe *swqe; 768 int swqe_index; 769 int i, k; 770 771 for (i = 0; i < port->num_def_qps; i++) { 772 struct ehea_port_res *pr = &port->port_res[i]; 773 int ret; 774 k = 0; 775 swqe = ehea_get_swqe(pr->qp, &swqe_index); 776 memset(swqe, 0, SWQE_HEADER_SIZE); 777 atomic_dec(&pr->swqe_avail); 778 779 swqe->tx_control |= EHEA_SWQE_PURGE; 780 swqe->wr_id = SWQE_RESTART_CHECK; 781 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 782 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; 783 swqe->immediate_data_length = 80; 784 785 ehea_post_swqe(pr->qp, swqe); 786 787 ret = wait_event_timeout(port->restart_wq, 788 pr->sq_restart_flag == 0, 789 msecs_to_jiffies(100)); 790 791 if (!ret) { 792 pr_err("HW/SW queues out of sync\n"); 793 ehea_schedule_port_reset(pr->port); 794 return; 795 } 796 } 797 } 798 799 800 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) 801 { 802 struct sk_buff *skb; 803 struct ehea_cq *send_cq = pr->send_cq; 804 struct ehea_cqe *cqe; 805 int quota = my_quota; 806 int cqe_counter = 0; 807 int swqe_av = 0; 808 int index; 809 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, 810 pr - &pr->port->port_res[0]); 811 812 cqe = ehea_poll_cq(send_cq); 813 while (cqe && (quota > 0)) { 814 ehea_inc_cq(send_cq); 815 816 cqe_counter++; 817 rmb(); 818 819 if (cqe->wr_id == SWQE_RESTART_CHECK) { 820 pr->sq_restart_flag = 1; 821 swqe_av++; 822 break; 823 } 824 825 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { 826 pr_err("Bad send completion status=0x%04X\n", 827 cqe->status); 828 829 if (netif_msg_tx_err(pr->port)) 830 ehea_dump(cqe, sizeof(*cqe), "Send CQE"); 831 832 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { 833 pr_err("Resetting port\n"); 834 ehea_schedule_port_reset(pr->port); 835 break; 836 } 837 } 838 839 if (netif_msg_tx_done(pr->port)) 840 ehea_dump(cqe, sizeof(*cqe), "CQE"); 841 842 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) 843 == EHEA_SWQE2_TYPE)) { 844 845 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 846 skb = pr->sq_skba.arr[index]; 847 dev_kfree_skb(skb); 848 pr->sq_skba.arr[index] = NULL; 849 } 850 851 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); 852 quota--; 853 854 cqe = ehea_poll_cq(send_cq); 855 } 856 857 ehea_update_feca(send_cq, cqe_counter); 858 atomic_add(swqe_av, &pr->swqe_avail); 859 860 if (unlikely(netif_tx_queue_stopped(txq) && 861 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { 862 __netif_tx_lock(txq, smp_processor_id()); 863 if (netif_tx_queue_stopped(txq) && 864 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) 865 netif_tx_wake_queue(txq); 866 __netif_tx_unlock(txq); 867 } 868 869 wake_up(&pr->port->swqe_avail_wq); 870 871 return cqe; 872 } 873 874 #define EHEA_POLL_MAX_CQES 65535 875 876 static int ehea_poll(struct napi_struct *napi, int budget) 877 { 878 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, 879 napi); 880 struct net_device *dev = pr->port->netdev; 881 struct ehea_cqe *cqe; 882 struct ehea_cqe *cqe_skb = NULL; 883 int wqe_index; 884 int rx = 0; 885 886 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 887 rx += ehea_proc_rwqes(dev, pr, budget - rx); 888 889 while (rx != budget) { 890 napi_complete(napi); 891 ehea_reset_cq_ep(pr->recv_cq); 892 ehea_reset_cq_ep(pr->send_cq); 893 ehea_reset_cq_n1(pr->recv_cq); 894 ehea_reset_cq_n1(pr->send_cq); 895 rmb(); 896 cqe = ehea_poll_rq1(pr->qp, &wqe_index); 897 cqe_skb = ehea_poll_cq(pr->send_cq); 898 899 if (!cqe && !cqe_skb) 900 return rx; 901 902 if (!napi_reschedule(napi)) 903 return rx; 904 905 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 906 rx += ehea_proc_rwqes(dev, pr, budget - rx); 907 } 908 909 return rx; 910 } 911 912 #ifdef CONFIG_NET_POLL_CONTROLLER 913 static void ehea_netpoll(struct net_device *dev) 914 { 915 struct ehea_port *port = netdev_priv(dev); 916 int i; 917 918 for (i = 0; i < port->num_def_qps; i++) 919 napi_schedule(&port->port_res[i].napi); 920 } 921 #endif 922 923 static irqreturn_t ehea_recv_irq_handler(int irq, void *param) 924 { 925 struct ehea_port_res *pr = param; 926 927 napi_schedule(&pr->napi); 928 929 return IRQ_HANDLED; 930 } 931 932 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) 933 { 934 struct ehea_port *port = param; 935 struct ehea_eqe *eqe; 936 struct ehea_qp *qp; 937 u32 qp_token; 938 u64 resource_type, aer, aerr; 939 int reset_port = 0; 940 941 eqe = ehea_poll_eq(port->qp_eq); 942 943 while (eqe) { 944 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); 945 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", 946 eqe->entry, qp_token); 947 948 qp = port->port_res[qp_token].qp; 949 950 resource_type = ehea_error_data(port->adapter, qp->fw_handle, 951 &aer, &aerr); 952 953 if (resource_type == EHEA_AER_RESTYPE_QP) { 954 if ((aer & EHEA_AER_RESET_MASK) || 955 (aerr & EHEA_AERR_RESET_MASK)) 956 reset_port = 1; 957 } else 958 reset_port = 1; /* Reset in case of CQ or EQ error */ 959 960 eqe = ehea_poll_eq(port->qp_eq); 961 } 962 963 if (reset_port) { 964 pr_err("Resetting port\n"); 965 ehea_schedule_port_reset(port); 966 } 967 968 return IRQ_HANDLED; 969 } 970 971 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, 972 int logical_port) 973 { 974 int i; 975 976 for (i = 0; i < EHEA_MAX_PORTS; i++) 977 if (adapter->port[i]) 978 if (adapter->port[i]->logical_port_id == logical_port) 979 return adapter->port[i]; 980 return NULL; 981 } 982 983 int ehea_sense_port_attr(struct ehea_port *port) 984 { 985 int ret; 986 u64 hret; 987 struct hcp_ehea_port_cb0 *cb0; 988 989 /* may be called via ehea_neq_tasklet() */ 990 cb0 = (void *)get_zeroed_page(GFP_ATOMIC); 991 if (!cb0) { 992 pr_err("no mem for cb0\n"); 993 ret = -ENOMEM; 994 goto out; 995 } 996 997 hret = ehea_h_query_ehea_port(port->adapter->handle, 998 port->logical_port_id, H_PORT_CB0, 999 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), 1000 cb0); 1001 if (hret != H_SUCCESS) { 1002 ret = -EIO; 1003 goto out_free; 1004 } 1005 1006 /* MAC address */ 1007 port->mac_addr = cb0->port_mac_addr << 16; 1008 1009 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { 1010 ret = -EADDRNOTAVAIL; 1011 goto out_free; 1012 } 1013 1014 /* Port speed */ 1015 switch (cb0->port_speed) { 1016 case H_SPEED_10M_H: 1017 port->port_speed = EHEA_SPEED_10M; 1018 port->full_duplex = 0; 1019 break; 1020 case H_SPEED_10M_F: 1021 port->port_speed = EHEA_SPEED_10M; 1022 port->full_duplex = 1; 1023 break; 1024 case H_SPEED_100M_H: 1025 port->port_speed = EHEA_SPEED_100M; 1026 port->full_duplex = 0; 1027 break; 1028 case H_SPEED_100M_F: 1029 port->port_speed = EHEA_SPEED_100M; 1030 port->full_duplex = 1; 1031 break; 1032 case H_SPEED_1G_F: 1033 port->port_speed = EHEA_SPEED_1G; 1034 port->full_duplex = 1; 1035 break; 1036 case H_SPEED_10G_F: 1037 port->port_speed = EHEA_SPEED_10G; 1038 port->full_duplex = 1; 1039 break; 1040 default: 1041 port->port_speed = 0; 1042 port->full_duplex = 0; 1043 break; 1044 } 1045 1046 port->autoneg = 1; 1047 port->num_mcs = cb0->num_default_qps; 1048 1049 /* Number of default QPs */ 1050 if (use_mcs) 1051 port->num_def_qps = cb0->num_default_qps; 1052 else 1053 port->num_def_qps = 1; 1054 1055 if (!port->num_def_qps) { 1056 ret = -EINVAL; 1057 goto out_free; 1058 } 1059 1060 ret = 0; 1061 out_free: 1062 if (ret || netif_msg_probe(port)) 1063 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); 1064 free_page((unsigned long)cb0); 1065 out: 1066 return ret; 1067 } 1068 1069 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) 1070 { 1071 struct hcp_ehea_port_cb4 *cb4; 1072 u64 hret; 1073 int ret = 0; 1074 1075 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 1076 if (!cb4) { 1077 pr_err("no mem for cb4\n"); 1078 ret = -ENOMEM; 1079 goto out; 1080 } 1081 1082 cb4->port_speed = port_speed; 1083 1084 netif_carrier_off(port->netdev); 1085 1086 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1087 port->logical_port_id, 1088 H_PORT_CB4, H_PORT_CB4_SPEED, cb4); 1089 if (hret == H_SUCCESS) { 1090 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; 1091 1092 hret = ehea_h_query_ehea_port(port->adapter->handle, 1093 port->logical_port_id, 1094 H_PORT_CB4, H_PORT_CB4_SPEED, 1095 cb4); 1096 if (hret == H_SUCCESS) { 1097 switch (cb4->port_speed) { 1098 case H_SPEED_10M_H: 1099 port->port_speed = EHEA_SPEED_10M; 1100 port->full_duplex = 0; 1101 break; 1102 case H_SPEED_10M_F: 1103 port->port_speed = EHEA_SPEED_10M; 1104 port->full_duplex = 1; 1105 break; 1106 case H_SPEED_100M_H: 1107 port->port_speed = EHEA_SPEED_100M; 1108 port->full_duplex = 0; 1109 break; 1110 case H_SPEED_100M_F: 1111 port->port_speed = EHEA_SPEED_100M; 1112 port->full_duplex = 1; 1113 break; 1114 case H_SPEED_1G_F: 1115 port->port_speed = EHEA_SPEED_1G; 1116 port->full_duplex = 1; 1117 break; 1118 case H_SPEED_10G_F: 1119 port->port_speed = EHEA_SPEED_10G; 1120 port->full_duplex = 1; 1121 break; 1122 default: 1123 port->port_speed = 0; 1124 port->full_duplex = 0; 1125 break; 1126 } 1127 } else { 1128 pr_err("Failed sensing port speed\n"); 1129 ret = -EIO; 1130 } 1131 } else { 1132 if (hret == H_AUTHORITY) { 1133 pr_info("Hypervisor denied setting port speed\n"); 1134 ret = -EPERM; 1135 } else { 1136 ret = -EIO; 1137 pr_err("Failed setting port speed\n"); 1138 } 1139 } 1140 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) 1141 netif_carrier_on(port->netdev); 1142 1143 free_page((unsigned long)cb4); 1144 out: 1145 return ret; 1146 } 1147 1148 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) 1149 { 1150 int ret; 1151 u8 ec; 1152 u8 portnum; 1153 struct ehea_port *port; 1154 struct net_device *dev; 1155 1156 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); 1157 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); 1158 port = ehea_get_port(adapter, portnum); 1159 dev = port->netdev; 1160 1161 switch (ec) { 1162 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1163 1164 if (!port) { 1165 netdev_err(dev, "unknown portnum %x\n", portnum); 1166 break; 1167 } 1168 1169 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1170 if (!netif_carrier_ok(dev)) { 1171 ret = ehea_sense_port_attr(port); 1172 if (ret) { 1173 netdev_err(dev, "failed resensing port attributes\n"); 1174 break; 1175 } 1176 1177 netif_info(port, link, dev, 1178 "Logical port up: %dMbps %s Duplex\n", 1179 port->port_speed, 1180 port->full_duplex == 1 ? 1181 "Full" : "Half"); 1182 1183 netif_carrier_on(dev); 1184 netif_wake_queue(dev); 1185 } 1186 } else 1187 if (netif_carrier_ok(dev)) { 1188 netif_info(port, link, dev, 1189 "Logical port down\n"); 1190 netif_carrier_off(dev); 1191 netif_tx_disable(dev); 1192 } 1193 1194 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1195 port->phy_link = EHEA_PHY_LINK_UP; 1196 netif_info(port, link, dev, 1197 "Physical port up\n"); 1198 if (prop_carrier_state) 1199 netif_carrier_on(dev); 1200 } else { 1201 port->phy_link = EHEA_PHY_LINK_DOWN; 1202 netif_info(port, link, dev, 1203 "Physical port down\n"); 1204 if (prop_carrier_state) 1205 netif_carrier_off(dev); 1206 } 1207 1208 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1209 netdev_info(dev, 1210 "External switch port is primary port\n"); 1211 else 1212 netdev_info(dev, 1213 "External switch port is backup port\n"); 1214 1215 break; 1216 case EHEA_EC_ADAPTER_MALFUNC: 1217 netdev_err(dev, "Adapter malfunction\n"); 1218 break; 1219 case EHEA_EC_PORT_MALFUNC: 1220 netdev_info(dev, "Port malfunction\n"); 1221 netif_carrier_off(dev); 1222 netif_tx_disable(dev); 1223 break; 1224 default: 1225 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1226 break; 1227 } 1228 } 1229 1230 static void ehea_neq_tasklet(unsigned long data) 1231 { 1232 struct ehea_adapter *adapter = (struct ehea_adapter *)data; 1233 struct ehea_eqe *eqe; 1234 u64 event_mask; 1235 1236 eqe = ehea_poll_eq(adapter->neq); 1237 pr_debug("eqe=%p\n", eqe); 1238 1239 while (eqe) { 1240 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1241 ehea_parse_eqe(adapter, eqe->entry); 1242 eqe = ehea_poll_eq(adapter->neq); 1243 pr_debug("next eqe=%p\n", eqe); 1244 } 1245 1246 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1247 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1248 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1249 1250 ehea_h_reset_events(adapter->handle, 1251 adapter->neq->fw_handle, event_mask); 1252 } 1253 1254 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1255 { 1256 struct ehea_adapter *adapter = param; 1257 tasklet_hi_schedule(&adapter->neq_tasklet); 1258 return IRQ_HANDLED; 1259 } 1260 1261 1262 static int ehea_fill_port_res(struct ehea_port_res *pr) 1263 { 1264 int ret; 1265 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1266 1267 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1268 1269 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1270 1271 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1272 1273 return ret; 1274 } 1275 1276 static int ehea_reg_interrupts(struct net_device *dev) 1277 { 1278 struct ehea_port *port = netdev_priv(dev); 1279 struct ehea_port_res *pr; 1280 int i, ret; 1281 1282 1283 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1284 dev->name); 1285 1286 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1287 ehea_qp_aff_irq_handler, 1288 IRQF_DISABLED, port->int_aff_name, port); 1289 if (ret) { 1290 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1291 port->qp_eq->attr.ist1); 1292 goto out_free_qpeq; 1293 } 1294 1295 netif_info(port, ifup, dev, 1296 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1297 port->qp_eq->attr.ist1); 1298 1299 1300 for (i = 0; i < port->num_def_qps; i++) { 1301 pr = &port->port_res[i]; 1302 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1303 "%s-queue%d", dev->name, i); 1304 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1305 ehea_recv_irq_handler, 1306 IRQF_DISABLED, pr->int_send_name, 1307 pr); 1308 if (ret) { 1309 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1310 i, pr->eq->attr.ist1); 1311 goto out_free_req; 1312 } 1313 netif_info(port, ifup, dev, 1314 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1315 pr->eq->attr.ist1, i); 1316 } 1317 out: 1318 return ret; 1319 1320 1321 out_free_req: 1322 while (--i >= 0) { 1323 u32 ist = port->port_res[i].eq->attr.ist1; 1324 ibmebus_free_irq(ist, &port->port_res[i]); 1325 } 1326 1327 out_free_qpeq: 1328 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1329 i = port->num_def_qps; 1330 1331 goto out; 1332 1333 } 1334 1335 static void ehea_free_interrupts(struct net_device *dev) 1336 { 1337 struct ehea_port *port = netdev_priv(dev); 1338 struct ehea_port_res *pr; 1339 int i; 1340 1341 /* send */ 1342 1343 for (i = 0; i < port->num_def_qps; i++) { 1344 pr = &port->port_res[i]; 1345 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1346 netif_info(port, intr, dev, 1347 "free send irq for res %d with handle 0x%X\n", 1348 i, pr->eq->attr.ist1); 1349 } 1350 1351 /* associated events */ 1352 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1353 netif_info(port, intr, dev, 1354 "associated event interrupt for handle 0x%X freed\n", 1355 port->qp_eq->attr.ist1); 1356 } 1357 1358 static int ehea_configure_port(struct ehea_port *port) 1359 { 1360 int ret, i; 1361 u64 hret, mask; 1362 struct hcp_ehea_port_cb0 *cb0; 1363 1364 ret = -ENOMEM; 1365 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1366 if (!cb0) 1367 goto out; 1368 1369 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1370 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1371 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1372 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1373 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1374 PXLY_RC_VLAN_FILTER) 1375 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1376 1377 for (i = 0; i < port->num_mcs; i++) 1378 if (use_mcs) 1379 cb0->default_qpn_arr[i] = 1380 port->port_res[i].qp->init_attr.qp_nr; 1381 else 1382 cb0->default_qpn_arr[i] = 1383 port->port_res[0].qp->init_attr.qp_nr; 1384 1385 if (netif_msg_ifup(port)) 1386 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1387 1388 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1389 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1390 1391 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1392 port->logical_port_id, 1393 H_PORT_CB0, mask, cb0); 1394 ret = -EIO; 1395 if (hret != H_SUCCESS) 1396 goto out_free; 1397 1398 ret = 0; 1399 1400 out_free: 1401 free_page((unsigned long)cb0); 1402 out: 1403 return ret; 1404 } 1405 1406 int ehea_gen_smrs(struct ehea_port_res *pr) 1407 { 1408 int ret; 1409 struct ehea_adapter *adapter = pr->port->adapter; 1410 1411 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1412 if (ret) 1413 goto out; 1414 1415 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1416 if (ret) 1417 goto out_free; 1418 1419 return 0; 1420 1421 out_free: 1422 ehea_rem_mr(&pr->send_mr); 1423 out: 1424 pr_err("Generating SMRS failed\n"); 1425 return -EIO; 1426 } 1427 1428 int ehea_rem_smrs(struct ehea_port_res *pr) 1429 { 1430 if ((ehea_rem_mr(&pr->send_mr)) || 1431 (ehea_rem_mr(&pr->recv_mr))) 1432 return -EIO; 1433 else 1434 return 0; 1435 } 1436 1437 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1438 { 1439 int arr_size = sizeof(void *) * max_q_entries; 1440 1441 q_skba->arr = vzalloc(arr_size); 1442 if (!q_skba->arr) 1443 return -ENOMEM; 1444 1445 q_skba->len = max_q_entries; 1446 q_skba->index = 0; 1447 q_skba->os_skbs = 0; 1448 1449 return 0; 1450 } 1451 1452 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1453 struct port_res_cfg *pr_cfg, int queue_token) 1454 { 1455 struct ehea_adapter *adapter = port->adapter; 1456 enum ehea_eq_type eq_type = EHEA_EQ; 1457 struct ehea_qp_init_attr *init_attr = NULL; 1458 int ret = -EIO; 1459 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1460 1461 tx_bytes = pr->tx_bytes; 1462 tx_packets = pr->tx_packets; 1463 rx_bytes = pr->rx_bytes; 1464 rx_packets = pr->rx_packets; 1465 1466 memset(pr, 0, sizeof(struct ehea_port_res)); 1467 1468 pr->tx_bytes = rx_bytes; 1469 pr->tx_packets = tx_packets; 1470 pr->rx_bytes = rx_bytes; 1471 pr->rx_packets = rx_packets; 1472 1473 pr->port = port; 1474 1475 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1476 if (!pr->eq) { 1477 pr_err("create_eq failed (eq)\n"); 1478 goto out_free; 1479 } 1480 1481 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1482 pr->eq->fw_handle, 1483 port->logical_port_id); 1484 if (!pr->recv_cq) { 1485 pr_err("create_cq failed (cq_recv)\n"); 1486 goto out_free; 1487 } 1488 1489 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1490 pr->eq->fw_handle, 1491 port->logical_port_id); 1492 if (!pr->send_cq) { 1493 pr_err("create_cq failed (cq_send)\n"); 1494 goto out_free; 1495 } 1496 1497 if (netif_msg_ifup(port)) 1498 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1499 pr->send_cq->attr.act_nr_of_cqes, 1500 pr->recv_cq->attr.act_nr_of_cqes); 1501 1502 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1503 if (!init_attr) { 1504 ret = -ENOMEM; 1505 pr_err("no mem for ehea_qp_init_attr\n"); 1506 goto out_free; 1507 } 1508 1509 init_attr->low_lat_rq1 = 1; 1510 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1511 init_attr->rq_count = 3; 1512 init_attr->qp_token = queue_token; 1513 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1514 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1515 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1516 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1517 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1518 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1519 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1520 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1521 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1522 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1523 init_attr->port_nr = port->logical_port_id; 1524 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1525 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1526 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1527 1528 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1529 if (!pr->qp) { 1530 pr_err("create_qp failed\n"); 1531 ret = -EIO; 1532 goto out_free; 1533 } 1534 1535 if (netif_msg_ifup(port)) 1536 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n", 1537 init_attr->qp_nr, 1538 init_attr->act_nr_send_wqes, 1539 init_attr->act_nr_rwqes_rq1, 1540 init_attr->act_nr_rwqes_rq2, 1541 init_attr->act_nr_rwqes_rq3); 1542 1543 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1544 1545 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1546 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1547 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1548 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1549 if (ret) 1550 goto out_free; 1551 1552 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1553 if (ehea_gen_smrs(pr) != 0) { 1554 ret = -EIO; 1555 goto out_free; 1556 } 1557 1558 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1559 1560 kfree(init_attr); 1561 1562 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); 1563 1564 ret = 0; 1565 goto out; 1566 1567 out_free: 1568 kfree(init_attr); 1569 vfree(pr->sq_skba.arr); 1570 vfree(pr->rq1_skba.arr); 1571 vfree(pr->rq2_skba.arr); 1572 vfree(pr->rq3_skba.arr); 1573 ehea_destroy_qp(pr->qp); 1574 ehea_destroy_cq(pr->send_cq); 1575 ehea_destroy_cq(pr->recv_cq); 1576 ehea_destroy_eq(pr->eq); 1577 out: 1578 return ret; 1579 } 1580 1581 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1582 { 1583 int ret, i; 1584 1585 if (pr->qp) 1586 netif_napi_del(&pr->napi); 1587 1588 ret = ehea_destroy_qp(pr->qp); 1589 1590 if (!ret) { 1591 ehea_destroy_cq(pr->send_cq); 1592 ehea_destroy_cq(pr->recv_cq); 1593 ehea_destroy_eq(pr->eq); 1594 1595 for (i = 0; i < pr->rq1_skba.len; i++) 1596 if (pr->rq1_skba.arr[i]) 1597 dev_kfree_skb(pr->rq1_skba.arr[i]); 1598 1599 for (i = 0; i < pr->rq2_skba.len; i++) 1600 if (pr->rq2_skba.arr[i]) 1601 dev_kfree_skb(pr->rq2_skba.arr[i]); 1602 1603 for (i = 0; i < pr->rq3_skba.len; i++) 1604 if (pr->rq3_skba.arr[i]) 1605 dev_kfree_skb(pr->rq3_skba.arr[i]); 1606 1607 for (i = 0; i < pr->sq_skba.len; i++) 1608 if (pr->sq_skba.arr[i]) 1609 dev_kfree_skb(pr->sq_skba.arr[i]); 1610 1611 vfree(pr->rq1_skba.arr); 1612 vfree(pr->rq2_skba.arr); 1613 vfree(pr->rq3_skba.arr); 1614 vfree(pr->sq_skba.arr); 1615 ret = ehea_rem_smrs(pr); 1616 } 1617 return ret; 1618 } 1619 1620 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1621 u32 lkey) 1622 { 1623 int skb_data_size = skb_headlen(skb); 1624 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1625 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1626 unsigned int immediate_len = SWQE2_MAX_IMM; 1627 1628 swqe->descriptors = 0; 1629 1630 if (skb_is_gso(skb)) { 1631 swqe->tx_control |= EHEA_SWQE_TSO; 1632 swqe->mss = skb_shinfo(skb)->gso_size; 1633 /* 1634 * For TSO packets we only copy the headers into the 1635 * immediate area. 1636 */ 1637 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb); 1638 } 1639 1640 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1641 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1642 swqe->immediate_data_length = immediate_len; 1643 1644 if (skb_data_size > immediate_len) { 1645 sg1entry->l_key = lkey; 1646 sg1entry->len = skb_data_size - immediate_len; 1647 sg1entry->vaddr = 1648 ehea_map_vaddr(skb->data + immediate_len); 1649 swqe->descriptors++; 1650 } 1651 } else { 1652 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1653 swqe->immediate_data_length = skb_data_size; 1654 } 1655 } 1656 1657 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1658 struct ehea_swqe *swqe, u32 lkey) 1659 { 1660 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1661 skb_frag_t *frag; 1662 int nfrags, sg1entry_contains_frag_data, i; 1663 1664 nfrags = skb_shinfo(skb)->nr_frags; 1665 sg1entry = &swqe->u.immdata_desc.sg_entry; 1666 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1667 sg1entry_contains_frag_data = 0; 1668 1669 write_swqe2_immediate(skb, swqe, lkey); 1670 1671 /* write descriptors */ 1672 if (nfrags > 0) { 1673 if (swqe->descriptors == 0) { 1674 /* sg1entry not yet used */ 1675 frag = &skb_shinfo(skb)->frags[0]; 1676 1677 /* copy sg1entry data */ 1678 sg1entry->l_key = lkey; 1679 sg1entry->len = skb_frag_size(frag); 1680 sg1entry->vaddr = 1681 ehea_map_vaddr(skb_frag_address(frag)); 1682 swqe->descriptors++; 1683 sg1entry_contains_frag_data = 1; 1684 } 1685 1686 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1687 1688 frag = &skb_shinfo(skb)->frags[i]; 1689 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1690 1691 sgentry->l_key = lkey; 1692 sgentry->len = skb_frag_size(frag); 1693 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1694 swqe->descriptors++; 1695 } 1696 } 1697 } 1698 1699 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1700 { 1701 int ret = 0; 1702 u64 hret; 1703 u8 reg_type; 1704 1705 /* De/Register untagged packets */ 1706 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1707 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1708 port->logical_port_id, 1709 reg_type, port->mac_addr, 0, hcallid); 1710 if (hret != H_SUCCESS) { 1711 pr_err("%sregistering bc address failed (tagged)\n", 1712 hcallid == H_REG_BCMC ? "" : "de"); 1713 ret = -EIO; 1714 goto out_herr; 1715 } 1716 1717 /* De/Register VLAN packets */ 1718 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1719 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1720 port->logical_port_id, 1721 reg_type, port->mac_addr, 0, hcallid); 1722 if (hret != H_SUCCESS) { 1723 pr_err("%sregistering bc address failed (vlan)\n", 1724 hcallid == H_REG_BCMC ? "" : "de"); 1725 ret = -EIO; 1726 } 1727 out_herr: 1728 return ret; 1729 } 1730 1731 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1732 { 1733 struct ehea_port *port = netdev_priv(dev); 1734 struct sockaddr *mac_addr = sa; 1735 struct hcp_ehea_port_cb0 *cb0; 1736 int ret; 1737 u64 hret; 1738 1739 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1740 ret = -EADDRNOTAVAIL; 1741 goto out; 1742 } 1743 1744 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1745 if (!cb0) { 1746 pr_err("no mem for cb0\n"); 1747 ret = -ENOMEM; 1748 goto out; 1749 } 1750 1751 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1752 1753 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1754 1755 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1756 port->logical_port_id, H_PORT_CB0, 1757 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1758 if (hret != H_SUCCESS) { 1759 ret = -EIO; 1760 goto out_free; 1761 } 1762 1763 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); 1764 1765 /* Deregister old MAC in pHYP */ 1766 if (port->state == EHEA_PORT_UP) { 1767 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1768 if (ret) 1769 goto out_upregs; 1770 } 1771 1772 port->mac_addr = cb0->port_mac_addr << 16; 1773 1774 /* Register new MAC in pHYP */ 1775 if (port->state == EHEA_PORT_UP) { 1776 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1777 if (ret) 1778 goto out_upregs; 1779 } 1780 1781 ret = 0; 1782 1783 out_upregs: 1784 ehea_update_bcmc_registrations(); 1785 out_free: 1786 free_page((unsigned long)cb0); 1787 out: 1788 return ret; 1789 } 1790 1791 static void ehea_promiscuous_error(u64 hret, int enable) 1792 { 1793 if (hret == H_AUTHORITY) 1794 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1795 enable == 1 ? "en" : "dis"); 1796 else 1797 pr_err("failed %sabling promiscuous mode\n", 1798 enable == 1 ? "en" : "dis"); 1799 } 1800 1801 static void ehea_promiscuous(struct net_device *dev, int enable) 1802 { 1803 struct ehea_port *port = netdev_priv(dev); 1804 struct hcp_ehea_port_cb7 *cb7; 1805 u64 hret; 1806 1807 if (enable == port->promisc) 1808 return; 1809 1810 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1811 if (!cb7) { 1812 pr_err("no mem for cb7\n"); 1813 goto out; 1814 } 1815 1816 /* Modify Pxs_DUCQPN in CB7 */ 1817 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1818 1819 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1820 port->logical_port_id, 1821 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1822 if (hret) { 1823 ehea_promiscuous_error(hret, enable); 1824 goto out; 1825 } 1826 1827 port->promisc = enable; 1828 out: 1829 free_page((unsigned long)cb7); 1830 } 1831 1832 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1833 u32 hcallid) 1834 { 1835 u64 hret; 1836 u8 reg_type; 1837 1838 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST 1839 | EHEA_BCMC_UNTAGGED; 1840 1841 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1842 port->logical_port_id, 1843 reg_type, mc_mac_addr, 0, hcallid); 1844 if (hret) 1845 goto out; 1846 1847 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST 1848 | EHEA_BCMC_VLANID_ALL; 1849 1850 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1851 port->logical_port_id, 1852 reg_type, mc_mac_addr, 0, hcallid); 1853 out: 1854 return hret; 1855 } 1856 1857 static int ehea_drop_multicast_list(struct net_device *dev) 1858 { 1859 struct ehea_port *port = netdev_priv(dev); 1860 struct ehea_mc_list *mc_entry = port->mc_list; 1861 struct list_head *pos; 1862 struct list_head *temp; 1863 int ret = 0; 1864 u64 hret; 1865 1866 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1867 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1868 1869 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1870 H_DEREG_BCMC); 1871 if (hret) { 1872 pr_err("failed deregistering mcast MAC\n"); 1873 ret = -EIO; 1874 } 1875 1876 list_del(pos); 1877 kfree(mc_entry); 1878 } 1879 return ret; 1880 } 1881 1882 static void ehea_allmulti(struct net_device *dev, int enable) 1883 { 1884 struct ehea_port *port = netdev_priv(dev); 1885 u64 hret; 1886 1887 if (!port->allmulti) { 1888 if (enable) { 1889 /* Enable ALLMULTI */ 1890 ehea_drop_multicast_list(dev); 1891 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1892 if (!hret) 1893 port->allmulti = 1; 1894 else 1895 netdev_err(dev, 1896 "failed enabling IFF_ALLMULTI\n"); 1897 } 1898 } else 1899 if (!enable) { 1900 /* Disable ALLMULTI */ 1901 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1902 if (!hret) 1903 port->allmulti = 0; 1904 else 1905 netdev_err(dev, 1906 "failed disabling IFF_ALLMULTI\n"); 1907 } 1908 } 1909 1910 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1911 { 1912 struct ehea_mc_list *ehea_mcl_entry; 1913 u64 hret; 1914 1915 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1916 if (!ehea_mcl_entry) { 1917 pr_err("no mem for mcl_entry\n"); 1918 return; 1919 } 1920 1921 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1922 1923 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1924 1925 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1926 H_REG_BCMC); 1927 if (!hret) 1928 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1929 else { 1930 pr_err("failed registering mcast MAC\n"); 1931 kfree(ehea_mcl_entry); 1932 } 1933 } 1934 1935 static void ehea_set_multicast_list(struct net_device *dev) 1936 { 1937 struct ehea_port *port = netdev_priv(dev); 1938 struct netdev_hw_addr *ha; 1939 int ret; 1940 1941 if (port->promisc) { 1942 ehea_promiscuous(dev, 1); 1943 return; 1944 } 1945 ehea_promiscuous(dev, 0); 1946 1947 if (dev->flags & IFF_ALLMULTI) { 1948 ehea_allmulti(dev, 1); 1949 goto out; 1950 } 1951 ehea_allmulti(dev, 0); 1952 1953 if (!netdev_mc_empty(dev)) { 1954 ret = ehea_drop_multicast_list(dev); 1955 if (ret) { 1956 /* Dropping the current multicast list failed. 1957 * Enabling ALL_MULTI is the best we can do. 1958 */ 1959 ehea_allmulti(dev, 1); 1960 } 1961 1962 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1963 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1964 port->adapter->max_mc_mac); 1965 goto out; 1966 } 1967 1968 netdev_for_each_mc_addr(ha, dev) 1969 ehea_add_multicast_entry(port, ha->addr); 1970 1971 } 1972 out: 1973 ehea_update_bcmc_registrations(); 1974 } 1975 1976 static int ehea_change_mtu(struct net_device *dev, int new_mtu) 1977 { 1978 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE)) 1979 return -EINVAL; 1980 dev->mtu = new_mtu; 1981 return 0; 1982 } 1983 1984 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1985 { 1986 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1987 1988 if (skb->protocol != htons(ETH_P_IP)) 1989 return; 1990 1991 if (skb->ip_summed == CHECKSUM_PARTIAL) 1992 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 1993 1994 swqe->ip_start = skb_network_offset(skb); 1995 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 1996 1997 switch (ip_hdr(skb)->protocol) { 1998 case IPPROTO_UDP: 1999 if (skb->ip_summed == CHECKSUM_PARTIAL) 2000 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2001 2002 swqe->tcp_offset = swqe->ip_end + 1 + 2003 offsetof(struct udphdr, check); 2004 break; 2005 2006 case IPPROTO_TCP: 2007 if (skb->ip_summed == CHECKSUM_PARTIAL) 2008 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2009 2010 swqe->tcp_offset = swqe->ip_end + 1 + 2011 offsetof(struct tcphdr, check); 2012 break; 2013 } 2014 } 2015 2016 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 2017 struct ehea_swqe *swqe, u32 lkey) 2018 { 2019 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 2020 2021 xmit_common(skb, swqe); 2022 2023 write_swqe2_data(skb, dev, swqe, lkey); 2024 } 2025 2026 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 2027 struct ehea_swqe *swqe) 2028 { 2029 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2030 2031 xmit_common(skb, swqe); 2032 2033 if (!skb->data_len) 2034 skb_copy_from_linear_data(skb, imm_data, skb->len); 2035 else 2036 skb_copy_bits(skb, 0, imm_data, skb->len); 2037 2038 swqe->immediate_data_length = skb->len; 2039 dev_kfree_skb(skb); 2040 } 2041 2042 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2043 { 2044 struct ehea_port *port = netdev_priv(dev); 2045 struct ehea_swqe *swqe; 2046 u32 lkey; 2047 int swqe_index; 2048 struct ehea_port_res *pr; 2049 struct netdev_queue *txq; 2050 2051 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2052 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2053 2054 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2055 memset(swqe, 0, SWQE_HEADER_SIZE); 2056 atomic_dec(&pr->swqe_avail); 2057 2058 if (vlan_tx_tag_present(skb)) { 2059 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2060 swqe->vlan_tag = vlan_tx_tag_get(skb); 2061 } 2062 2063 pr->tx_packets++; 2064 pr->tx_bytes += skb->len; 2065 2066 if (skb->len <= SWQE3_MAX_IMM) { 2067 u32 sig_iv = port->sig_comp_iv; 2068 u32 swqe_num = pr->swqe_id_counter; 2069 ehea_xmit3(skb, dev, swqe); 2070 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2071 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2072 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2073 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2074 sig_iv); 2075 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2076 pr->swqe_ll_count = 0; 2077 } else 2078 pr->swqe_ll_count += 1; 2079 } else { 2080 swqe->wr_id = 2081 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2082 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2083 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2084 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2085 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2086 2087 pr->sq_skba.index++; 2088 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2089 2090 lkey = pr->send_mr.lkey; 2091 ehea_xmit2(skb, dev, swqe, lkey); 2092 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2093 } 2094 pr->swqe_id_counter += 1; 2095 2096 netif_info(port, tx_queued, dev, 2097 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2098 if (netif_msg_tx_queued(port)) 2099 ehea_dump(swqe, 512, "swqe"); 2100 2101 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2102 netif_tx_stop_queue(txq); 2103 swqe->tx_control |= EHEA_SWQE_PURGE; 2104 } 2105 2106 ehea_post_swqe(pr->qp, swqe); 2107 2108 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2109 pr->p_stats.queue_stopped++; 2110 netif_tx_stop_queue(txq); 2111 } 2112 2113 return NETDEV_TX_OK; 2114 } 2115 2116 static void ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid) 2117 { 2118 struct ehea_port *port = netdev_priv(dev); 2119 struct ehea_adapter *adapter = port->adapter; 2120 struct hcp_ehea_port_cb1 *cb1; 2121 int index; 2122 u64 hret; 2123 2124 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2125 if (!cb1) { 2126 pr_err("no mem for cb1\n"); 2127 goto out; 2128 } 2129 2130 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2131 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2132 if (hret != H_SUCCESS) { 2133 pr_err("query_ehea_port failed\n"); 2134 goto out; 2135 } 2136 2137 index = (vid / 64); 2138 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2139 2140 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2141 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2142 if (hret != H_SUCCESS) 2143 pr_err("modify_ehea_port failed\n"); 2144 out: 2145 free_page((unsigned long)cb1); 2146 return; 2147 } 2148 2149 static void ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid) 2150 { 2151 struct ehea_port *port = netdev_priv(dev); 2152 struct ehea_adapter *adapter = port->adapter; 2153 struct hcp_ehea_port_cb1 *cb1; 2154 int index; 2155 u64 hret; 2156 2157 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2158 if (!cb1) { 2159 pr_err("no mem for cb1\n"); 2160 goto out; 2161 } 2162 2163 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2164 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2165 if (hret != H_SUCCESS) { 2166 pr_err("query_ehea_port failed\n"); 2167 goto out; 2168 } 2169 2170 index = (vid / 64); 2171 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2172 2173 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2174 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2175 if (hret != H_SUCCESS) 2176 pr_err("modify_ehea_port failed\n"); 2177 out: 2178 free_page((unsigned long)cb1); 2179 } 2180 2181 int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2182 { 2183 int ret = -EIO; 2184 u64 hret; 2185 u16 dummy16 = 0; 2186 u64 dummy64 = 0; 2187 struct hcp_modify_qp_cb0 *cb0; 2188 2189 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2190 if (!cb0) { 2191 ret = -ENOMEM; 2192 goto out; 2193 } 2194 2195 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2196 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2197 if (hret != H_SUCCESS) { 2198 pr_err("query_ehea_qp failed (1)\n"); 2199 goto out; 2200 } 2201 2202 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2203 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2204 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2205 &dummy64, &dummy64, &dummy16, &dummy16); 2206 if (hret != H_SUCCESS) { 2207 pr_err("modify_ehea_qp failed (1)\n"); 2208 goto out; 2209 } 2210 2211 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2212 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2213 if (hret != H_SUCCESS) { 2214 pr_err("query_ehea_qp failed (2)\n"); 2215 goto out; 2216 } 2217 2218 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2219 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2220 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2221 &dummy64, &dummy64, &dummy16, &dummy16); 2222 if (hret != H_SUCCESS) { 2223 pr_err("modify_ehea_qp failed (2)\n"); 2224 goto out; 2225 } 2226 2227 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2228 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2229 if (hret != H_SUCCESS) { 2230 pr_err("query_ehea_qp failed (3)\n"); 2231 goto out; 2232 } 2233 2234 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2235 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2236 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2237 &dummy64, &dummy64, &dummy16, &dummy16); 2238 if (hret != H_SUCCESS) { 2239 pr_err("modify_ehea_qp failed (3)\n"); 2240 goto out; 2241 } 2242 2243 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2244 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2245 if (hret != H_SUCCESS) { 2246 pr_err("query_ehea_qp failed (4)\n"); 2247 goto out; 2248 } 2249 2250 ret = 0; 2251 out: 2252 free_page((unsigned long)cb0); 2253 return ret; 2254 } 2255 2256 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2257 { 2258 int ret, i; 2259 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2260 enum ehea_eq_type eq_type = EHEA_EQ; 2261 2262 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2263 EHEA_MAX_ENTRIES_EQ, 1); 2264 if (!port->qp_eq) { 2265 ret = -EINVAL; 2266 pr_err("ehea_create_eq failed (qp_eq)\n"); 2267 goto out_kill_eq; 2268 } 2269 2270 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2271 pr_cfg.max_entries_scq = sq_entries * 2; 2272 pr_cfg.max_entries_sq = sq_entries; 2273 pr_cfg.max_entries_rq1 = rq1_entries; 2274 pr_cfg.max_entries_rq2 = rq2_entries; 2275 pr_cfg.max_entries_rq3 = rq3_entries; 2276 2277 pr_cfg_small_rx.max_entries_rcq = 1; 2278 pr_cfg_small_rx.max_entries_scq = sq_entries; 2279 pr_cfg_small_rx.max_entries_sq = sq_entries; 2280 pr_cfg_small_rx.max_entries_rq1 = 1; 2281 pr_cfg_small_rx.max_entries_rq2 = 1; 2282 pr_cfg_small_rx.max_entries_rq3 = 1; 2283 2284 for (i = 0; i < def_qps; i++) { 2285 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2286 if (ret) 2287 goto out_clean_pr; 2288 } 2289 for (i = def_qps; i < def_qps; i++) { 2290 ret = ehea_init_port_res(port, &port->port_res[i], 2291 &pr_cfg_small_rx, i); 2292 if (ret) 2293 goto out_clean_pr; 2294 } 2295 2296 return 0; 2297 2298 out_clean_pr: 2299 while (--i >= 0) 2300 ehea_clean_portres(port, &port->port_res[i]); 2301 2302 out_kill_eq: 2303 ehea_destroy_eq(port->qp_eq); 2304 return ret; 2305 } 2306 2307 static int ehea_clean_all_portres(struct ehea_port *port) 2308 { 2309 int ret = 0; 2310 int i; 2311 2312 for (i = 0; i < port->num_def_qps; i++) 2313 ret |= ehea_clean_portres(port, &port->port_res[i]); 2314 2315 ret |= ehea_destroy_eq(port->qp_eq); 2316 2317 return ret; 2318 } 2319 2320 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2321 { 2322 if (adapter->active_ports) 2323 return; 2324 2325 ehea_rem_mr(&adapter->mr); 2326 } 2327 2328 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2329 { 2330 if (adapter->active_ports) 2331 return 0; 2332 2333 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2334 } 2335 2336 static int ehea_up(struct net_device *dev) 2337 { 2338 int ret, i; 2339 struct ehea_port *port = netdev_priv(dev); 2340 2341 if (port->state == EHEA_PORT_UP) 2342 return 0; 2343 2344 ret = ehea_port_res_setup(port, port->num_def_qps); 2345 if (ret) { 2346 netdev_err(dev, "port_res_failed\n"); 2347 goto out; 2348 } 2349 2350 /* Set default QP for this port */ 2351 ret = ehea_configure_port(port); 2352 if (ret) { 2353 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2354 goto out_clean_pr; 2355 } 2356 2357 ret = ehea_reg_interrupts(dev); 2358 if (ret) { 2359 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2360 goto out_clean_pr; 2361 } 2362 2363 for (i = 0; i < port->num_def_qps; i++) { 2364 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2365 if (ret) { 2366 netdev_err(dev, "activate_qp failed\n"); 2367 goto out_free_irqs; 2368 } 2369 } 2370 2371 for (i = 0; i < port->num_def_qps; i++) { 2372 ret = ehea_fill_port_res(&port->port_res[i]); 2373 if (ret) { 2374 netdev_err(dev, "out_free_irqs\n"); 2375 goto out_free_irqs; 2376 } 2377 } 2378 2379 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2380 if (ret) { 2381 ret = -EIO; 2382 goto out_free_irqs; 2383 } 2384 2385 port->state = EHEA_PORT_UP; 2386 2387 ret = 0; 2388 goto out; 2389 2390 out_free_irqs: 2391 ehea_free_interrupts(dev); 2392 2393 out_clean_pr: 2394 ehea_clean_all_portres(port); 2395 out: 2396 if (ret) 2397 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2398 2399 ehea_update_bcmc_registrations(); 2400 ehea_update_firmware_handles(); 2401 2402 return ret; 2403 } 2404 2405 static void port_napi_disable(struct ehea_port *port) 2406 { 2407 int i; 2408 2409 for (i = 0; i < port->num_def_qps; i++) 2410 napi_disable(&port->port_res[i].napi); 2411 } 2412 2413 static void port_napi_enable(struct ehea_port *port) 2414 { 2415 int i; 2416 2417 for (i = 0; i < port->num_def_qps; i++) 2418 napi_enable(&port->port_res[i].napi); 2419 } 2420 2421 static int ehea_open(struct net_device *dev) 2422 { 2423 int ret; 2424 struct ehea_port *port = netdev_priv(dev); 2425 2426 mutex_lock(&port->port_lock); 2427 2428 netif_info(port, ifup, dev, "enabling port\n"); 2429 2430 ret = ehea_up(dev); 2431 if (!ret) { 2432 port_napi_enable(port); 2433 netif_tx_start_all_queues(dev); 2434 } 2435 2436 mutex_unlock(&port->port_lock); 2437 schedule_delayed_work(&port->stats_work, msecs_to_jiffies(1000)); 2438 2439 return ret; 2440 } 2441 2442 static int ehea_down(struct net_device *dev) 2443 { 2444 int ret; 2445 struct ehea_port *port = netdev_priv(dev); 2446 2447 if (port->state == EHEA_PORT_DOWN) 2448 return 0; 2449 2450 ehea_drop_multicast_list(dev); 2451 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2452 2453 ehea_free_interrupts(dev); 2454 2455 port->state = EHEA_PORT_DOWN; 2456 2457 ehea_update_bcmc_registrations(); 2458 2459 ret = ehea_clean_all_portres(port); 2460 if (ret) 2461 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2462 2463 ehea_update_firmware_handles(); 2464 2465 return ret; 2466 } 2467 2468 static int ehea_stop(struct net_device *dev) 2469 { 2470 int ret; 2471 struct ehea_port *port = netdev_priv(dev); 2472 2473 netif_info(port, ifdown, dev, "disabling port\n"); 2474 2475 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2476 cancel_work_sync(&port->reset_task); 2477 cancel_delayed_work_sync(&port->stats_work); 2478 mutex_lock(&port->port_lock); 2479 netif_tx_stop_all_queues(dev); 2480 port_napi_disable(port); 2481 ret = ehea_down(dev); 2482 mutex_unlock(&port->port_lock); 2483 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2484 return ret; 2485 } 2486 2487 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2488 { 2489 struct ehea_qp qp = *orig_qp; 2490 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2491 struct ehea_swqe *swqe; 2492 int wqe_index; 2493 int i; 2494 2495 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2496 swqe = ehea_get_swqe(&qp, &wqe_index); 2497 swqe->tx_control |= EHEA_SWQE_PURGE; 2498 } 2499 } 2500 2501 static void ehea_flush_sq(struct ehea_port *port) 2502 { 2503 int i; 2504 2505 for (i = 0; i < port->num_def_qps; i++) { 2506 struct ehea_port_res *pr = &port->port_res[i]; 2507 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2508 int ret; 2509 2510 ret = wait_event_timeout(port->swqe_avail_wq, 2511 atomic_read(&pr->swqe_avail) >= swqe_max, 2512 msecs_to_jiffies(100)); 2513 2514 if (!ret) { 2515 pr_err("WARNING: sq not flushed completely\n"); 2516 break; 2517 } 2518 } 2519 } 2520 2521 int ehea_stop_qps(struct net_device *dev) 2522 { 2523 struct ehea_port *port = netdev_priv(dev); 2524 struct ehea_adapter *adapter = port->adapter; 2525 struct hcp_modify_qp_cb0 *cb0; 2526 int ret = -EIO; 2527 int dret; 2528 int i; 2529 u64 hret; 2530 u64 dummy64 = 0; 2531 u16 dummy16 = 0; 2532 2533 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2534 if (!cb0) { 2535 ret = -ENOMEM; 2536 goto out; 2537 } 2538 2539 for (i = 0; i < (port->num_def_qps); i++) { 2540 struct ehea_port_res *pr = &port->port_res[i]; 2541 struct ehea_qp *qp = pr->qp; 2542 2543 /* Purge send queue */ 2544 ehea_purge_sq(qp); 2545 2546 /* Disable queue pair */ 2547 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2548 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2549 cb0); 2550 if (hret != H_SUCCESS) { 2551 pr_err("query_ehea_qp failed (1)\n"); 2552 goto out; 2553 } 2554 2555 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2556 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2557 2558 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2559 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2560 1), cb0, &dummy64, 2561 &dummy64, &dummy16, &dummy16); 2562 if (hret != H_SUCCESS) { 2563 pr_err("modify_ehea_qp failed (1)\n"); 2564 goto out; 2565 } 2566 2567 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2568 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2569 cb0); 2570 if (hret != H_SUCCESS) { 2571 pr_err("query_ehea_qp failed (2)\n"); 2572 goto out; 2573 } 2574 2575 /* deregister shared memory regions */ 2576 dret = ehea_rem_smrs(pr); 2577 if (dret) { 2578 pr_err("unreg shared memory region failed\n"); 2579 goto out; 2580 } 2581 } 2582 2583 ret = 0; 2584 out: 2585 free_page((unsigned long)cb0); 2586 2587 return ret; 2588 } 2589 2590 void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2591 { 2592 struct ehea_qp qp = *orig_qp; 2593 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2594 struct ehea_rwqe *rwqe; 2595 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2596 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2597 struct sk_buff *skb; 2598 u32 lkey = pr->recv_mr.lkey; 2599 2600 2601 int i; 2602 int index; 2603 2604 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2605 rwqe = ehea_get_next_rwqe(&qp, 2); 2606 rwqe->sg_list[0].l_key = lkey; 2607 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2608 skb = skba_rq2[index]; 2609 if (skb) 2610 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2611 } 2612 2613 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2614 rwqe = ehea_get_next_rwqe(&qp, 3); 2615 rwqe->sg_list[0].l_key = lkey; 2616 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2617 skb = skba_rq3[index]; 2618 if (skb) 2619 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2620 } 2621 } 2622 2623 int ehea_restart_qps(struct net_device *dev) 2624 { 2625 struct ehea_port *port = netdev_priv(dev); 2626 struct ehea_adapter *adapter = port->adapter; 2627 int ret = 0; 2628 int i; 2629 2630 struct hcp_modify_qp_cb0 *cb0; 2631 u64 hret; 2632 u64 dummy64 = 0; 2633 u16 dummy16 = 0; 2634 2635 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2636 if (!cb0) { 2637 ret = -ENOMEM; 2638 goto out; 2639 } 2640 2641 for (i = 0; i < (port->num_def_qps); i++) { 2642 struct ehea_port_res *pr = &port->port_res[i]; 2643 struct ehea_qp *qp = pr->qp; 2644 2645 ret = ehea_gen_smrs(pr); 2646 if (ret) { 2647 netdev_err(dev, "creation of shared memory regions failed\n"); 2648 goto out; 2649 } 2650 2651 ehea_update_rqs(qp, pr); 2652 2653 /* Enable queue pair */ 2654 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2655 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2656 cb0); 2657 if (hret != H_SUCCESS) { 2658 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2659 goto out; 2660 } 2661 2662 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2663 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2664 2665 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2666 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2667 1), cb0, &dummy64, 2668 &dummy64, &dummy16, &dummy16); 2669 if (hret != H_SUCCESS) { 2670 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2671 goto out; 2672 } 2673 2674 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2675 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2676 cb0); 2677 if (hret != H_SUCCESS) { 2678 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2679 goto out; 2680 } 2681 2682 /* refill entire queue */ 2683 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2684 ehea_refill_rq2(pr, 0); 2685 ehea_refill_rq3(pr, 0); 2686 } 2687 out: 2688 free_page((unsigned long)cb0); 2689 2690 return ret; 2691 } 2692 2693 static void ehea_reset_port(struct work_struct *work) 2694 { 2695 int ret; 2696 struct ehea_port *port = 2697 container_of(work, struct ehea_port, reset_task); 2698 struct net_device *dev = port->netdev; 2699 2700 mutex_lock(&dlpar_mem_lock); 2701 port->resets++; 2702 mutex_lock(&port->port_lock); 2703 netif_tx_disable(dev); 2704 2705 port_napi_disable(port); 2706 2707 ehea_down(dev); 2708 2709 ret = ehea_up(dev); 2710 if (ret) 2711 goto out; 2712 2713 ehea_set_multicast_list(dev); 2714 2715 netif_info(port, timer, dev, "reset successful\n"); 2716 2717 port_napi_enable(port); 2718 2719 netif_tx_wake_all_queues(dev); 2720 out: 2721 mutex_unlock(&port->port_lock); 2722 mutex_unlock(&dlpar_mem_lock); 2723 } 2724 2725 static void ehea_rereg_mrs(void) 2726 { 2727 int ret, i; 2728 struct ehea_adapter *adapter; 2729 2730 pr_info("LPAR memory changed - re-initializing driver\n"); 2731 2732 list_for_each_entry(adapter, &adapter_list, list) 2733 if (adapter->active_ports) { 2734 /* Shutdown all ports */ 2735 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2736 struct ehea_port *port = adapter->port[i]; 2737 struct net_device *dev; 2738 2739 if (!port) 2740 continue; 2741 2742 dev = port->netdev; 2743 2744 if (dev->flags & IFF_UP) { 2745 mutex_lock(&port->port_lock); 2746 netif_tx_disable(dev); 2747 ehea_flush_sq(port); 2748 ret = ehea_stop_qps(dev); 2749 if (ret) { 2750 mutex_unlock(&port->port_lock); 2751 goto out; 2752 } 2753 port_napi_disable(port); 2754 mutex_unlock(&port->port_lock); 2755 } 2756 reset_sq_restart_flag(port); 2757 } 2758 2759 /* Unregister old memory region */ 2760 ret = ehea_rem_mr(&adapter->mr); 2761 if (ret) { 2762 pr_err("unregister MR failed - driver inoperable!\n"); 2763 goto out; 2764 } 2765 } 2766 2767 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2768 2769 list_for_each_entry(adapter, &adapter_list, list) 2770 if (adapter->active_ports) { 2771 /* Register new memory region */ 2772 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2773 if (ret) { 2774 pr_err("register MR failed - driver inoperable!\n"); 2775 goto out; 2776 } 2777 2778 /* Restart all ports */ 2779 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2780 struct ehea_port *port = adapter->port[i]; 2781 2782 if (port) { 2783 struct net_device *dev = port->netdev; 2784 2785 if (dev->flags & IFF_UP) { 2786 mutex_lock(&port->port_lock); 2787 ret = ehea_restart_qps(dev); 2788 if (!ret) { 2789 check_sqs(port); 2790 port_napi_enable(port); 2791 netif_tx_wake_all_queues(dev); 2792 } else { 2793 netdev_err(dev, "Unable to restart QPS\n"); 2794 } 2795 mutex_unlock(&port->port_lock); 2796 } 2797 } 2798 } 2799 } 2800 pr_info("re-initializing driver complete\n"); 2801 out: 2802 return; 2803 } 2804 2805 static void ehea_tx_watchdog(struct net_device *dev) 2806 { 2807 struct ehea_port *port = netdev_priv(dev); 2808 2809 if (netif_carrier_ok(dev) && 2810 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2811 ehea_schedule_port_reset(port); 2812 } 2813 2814 int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2815 { 2816 struct hcp_query_ehea *cb; 2817 u64 hret; 2818 int ret; 2819 2820 cb = (void *)get_zeroed_page(GFP_KERNEL); 2821 if (!cb) { 2822 ret = -ENOMEM; 2823 goto out; 2824 } 2825 2826 hret = ehea_h_query_ehea(adapter->handle, cb); 2827 2828 if (hret != H_SUCCESS) { 2829 ret = -EIO; 2830 goto out_herr; 2831 } 2832 2833 adapter->max_mc_mac = cb->max_mc_mac - 1; 2834 ret = 0; 2835 2836 out_herr: 2837 free_page((unsigned long)cb); 2838 out: 2839 return ret; 2840 } 2841 2842 int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2843 { 2844 struct hcp_ehea_port_cb4 *cb4; 2845 u64 hret; 2846 int ret = 0; 2847 2848 *jumbo = 0; 2849 2850 /* (Try to) enable *jumbo frames */ 2851 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2852 if (!cb4) { 2853 pr_err("no mem for cb4\n"); 2854 ret = -ENOMEM; 2855 goto out; 2856 } else { 2857 hret = ehea_h_query_ehea_port(port->adapter->handle, 2858 port->logical_port_id, 2859 H_PORT_CB4, 2860 H_PORT_CB4_JUMBO, cb4); 2861 if (hret == H_SUCCESS) { 2862 if (cb4->jumbo_frame) 2863 *jumbo = 1; 2864 else { 2865 cb4->jumbo_frame = 1; 2866 hret = ehea_h_modify_ehea_port(port->adapter-> 2867 handle, 2868 port-> 2869 logical_port_id, 2870 H_PORT_CB4, 2871 H_PORT_CB4_JUMBO, 2872 cb4); 2873 if (hret == H_SUCCESS) 2874 *jumbo = 1; 2875 } 2876 } else 2877 ret = -EINVAL; 2878 2879 free_page((unsigned long)cb4); 2880 } 2881 out: 2882 return ret; 2883 } 2884 2885 static ssize_t ehea_show_port_id(struct device *dev, 2886 struct device_attribute *attr, char *buf) 2887 { 2888 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2889 return sprintf(buf, "%d", port->logical_port_id); 2890 } 2891 2892 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id, 2893 NULL); 2894 2895 static void __devinit logical_port_release(struct device *dev) 2896 { 2897 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2898 of_node_put(port->ofdev.dev.of_node); 2899 } 2900 2901 static struct device *ehea_register_port(struct ehea_port *port, 2902 struct device_node *dn) 2903 { 2904 int ret; 2905 2906 port->ofdev.dev.of_node = of_node_get(dn); 2907 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2908 port->ofdev.dev.bus = &ibmebus_bus_type; 2909 2910 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2911 port->ofdev.dev.release = logical_port_release; 2912 2913 ret = of_device_register(&port->ofdev); 2914 if (ret) { 2915 pr_err("failed to register device. ret=%d\n", ret); 2916 goto out; 2917 } 2918 2919 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2920 if (ret) { 2921 pr_err("failed to register attributes, ret=%d\n", ret); 2922 goto out_unreg_of_dev; 2923 } 2924 2925 return &port->ofdev.dev; 2926 2927 out_unreg_of_dev: 2928 of_device_unregister(&port->ofdev); 2929 out: 2930 return NULL; 2931 } 2932 2933 static void ehea_unregister_port(struct ehea_port *port) 2934 { 2935 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2936 of_device_unregister(&port->ofdev); 2937 } 2938 2939 static const struct net_device_ops ehea_netdev_ops = { 2940 .ndo_open = ehea_open, 2941 .ndo_stop = ehea_stop, 2942 .ndo_start_xmit = ehea_start_xmit, 2943 #ifdef CONFIG_NET_POLL_CONTROLLER 2944 .ndo_poll_controller = ehea_netpoll, 2945 #endif 2946 .ndo_get_stats64 = ehea_get_stats64, 2947 .ndo_set_mac_address = ehea_set_mac_addr, 2948 .ndo_validate_addr = eth_validate_addr, 2949 .ndo_set_rx_mode = ehea_set_multicast_list, 2950 .ndo_change_mtu = ehea_change_mtu, 2951 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2952 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2953 .ndo_tx_timeout = ehea_tx_watchdog, 2954 }; 2955 2956 struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2957 u32 logical_port_id, 2958 struct device_node *dn) 2959 { 2960 int ret; 2961 struct net_device *dev; 2962 struct ehea_port *port; 2963 struct device *port_dev; 2964 int jumbo; 2965 2966 /* allocate memory for the port structures */ 2967 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2968 2969 if (!dev) { 2970 pr_err("no mem for net_device\n"); 2971 ret = -ENOMEM; 2972 goto out_err; 2973 } 2974 2975 port = netdev_priv(dev); 2976 2977 mutex_init(&port->port_lock); 2978 port->state = EHEA_PORT_DOWN; 2979 port->sig_comp_iv = sq_entries / 10; 2980 2981 port->adapter = adapter; 2982 port->netdev = dev; 2983 port->logical_port_id = logical_port_id; 2984 2985 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 2986 2987 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 2988 if (!port->mc_list) { 2989 ret = -ENOMEM; 2990 goto out_free_ethdev; 2991 } 2992 2993 INIT_LIST_HEAD(&port->mc_list->list); 2994 2995 ret = ehea_sense_port_attr(port); 2996 if (ret) 2997 goto out_free_mc_list; 2998 2999 netif_set_real_num_rx_queues(dev, port->num_def_qps); 3000 netif_set_real_num_tx_queues(dev, port->num_def_qps); 3001 3002 port_dev = ehea_register_port(port, dn); 3003 if (!port_dev) 3004 goto out_free_mc_list; 3005 3006 SET_NETDEV_DEV(dev, port_dev); 3007 3008 /* initialize net_device structure */ 3009 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); 3010 3011 dev->netdev_ops = &ehea_netdev_ops; 3012 ehea_set_ethtool_ops(dev); 3013 3014 dev->hw_features = NETIF_F_SG | NETIF_F_TSO 3015 | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO; 3016 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO 3017 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX 3018 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER 3019 | NETIF_F_RXCSUM; 3020 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3021 NETIF_F_IP_CSUM; 3022 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3023 3024 INIT_WORK(&port->reset_task, ehea_reset_port); 3025 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3026 3027 init_waitqueue_head(&port->swqe_avail_wq); 3028 init_waitqueue_head(&port->restart_wq); 3029 3030 memset(&port->stats, 0, sizeof(struct net_device_stats)); 3031 ret = register_netdev(dev); 3032 if (ret) { 3033 pr_err("register_netdev failed. ret=%d\n", ret); 3034 goto out_unreg_port; 3035 } 3036 3037 ret = ehea_get_jumboframe_status(port, &jumbo); 3038 if (ret) 3039 netdev_err(dev, "failed determining jumbo frame status\n"); 3040 3041 netdev_info(dev, "Jumbo frames are %sabled\n", 3042 jumbo == 1 ? "en" : "dis"); 3043 3044 adapter->active_ports++; 3045 3046 return port; 3047 3048 out_unreg_port: 3049 ehea_unregister_port(port); 3050 3051 out_free_mc_list: 3052 kfree(port->mc_list); 3053 3054 out_free_ethdev: 3055 free_netdev(dev); 3056 3057 out_err: 3058 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3059 logical_port_id, ret); 3060 return NULL; 3061 } 3062 3063 static void ehea_shutdown_single_port(struct ehea_port *port) 3064 { 3065 struct ehea_adapter *adapter = port->adapter; 3066 3067 cancel_work_sync(&port->reset_task); 3068 cancel_delayed_work_sync(&port->stats_work); 3069 unregister_netdev(port->netdev); 3070 ehea_unregister_port(port); 3071 kfree(port->mc_list); 3072 free_netdev(port->netdev); 3073 adapter->active_ports--; 3074 } 3075 3076 static int ehea_setup_ports(struct ehea_adapter *adapter) 3077 { 3078 struct device_node *lhea_dn; 3079 struct device_node *eth_dn = NULL; 3080 3081 const u32 *dn_log_port_id; 3082 int i = 0; 3083 3084 lhea_dn = adapter->ofdev->dev.of_node; 3085 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3086 3087 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3088 NULL); 3089 if (!dn_log_port_id) { 3090 pr_err("bad device node: eth_dn name=%s\n", 3091 eth_dn->full_name); 3092 continue; 3093 } 3094 3095 if (ehea_add_adapter_mr(adapter)) { 3096 pr_err("creating MR failed\n"); 3097 of_node_put(eth_dn); 3098 return -EIO; 3099 } 3100 3101 adapter->port[i] = ehea_setup_single_port(adapter, 3102 *dn_log_port_id, 3103 eth_dn); 3104 if (adapter->port[i]) 3105 netdev_info(adapter->port[i]->netdev, 3106 "logical port id #%d\n", *dn_log_port_id); 3107 else 3108 ehea_remove_adapter_mr(adapter); 3109 3110 i++; 3111 } 3112 return 0; 3113 } 3114 3115 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3116 u32 logical_port_id) 3117 { 3118 struct device_node *lhea_dn; 3119 struct device_node *eth_dn = NULL; 3120 const u32 *dn_log_port_id; 3121 3122 lhea_dn = adapter->ofdev->dev.of_node; 3123 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3124 3125 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3126 NULL); 3127 if (dn_log_port_id) 3128 if (*dn_log_port_id == logical_port_id) 3129 return eth_dn; 3130 } 3131 3132 return NULL; 3133 } 3134 3135 static ssize_t ehea_probe_port(struct device *dev, 3136 struct device_attribute *attr, 3137 const char *buf, size_t count) 3138 { 3139 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3140 struct ehea_port *port; 3141 struct device_node *eth_dn = NULL; 3142 int i; 3143 3144 u32 logical_port_id; 3145 3146 sscanf(buf, "%d", &logical_port_id); 3147 3148 port = ehea_get_port(adapter, logical_port_id); 3149 3150 if (port) { 3151 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3152 logical_port_id); 3153 return -EINVAL; 3154 } 3155 3156 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3157 3158 if (!eth_dn) { 3159 pr_info("no logical port with id %d found\n", logical_port_id); 3160 return -EINVAL; 3161 } 3162 3163 if (ehea_add_adapter_mr(adapter)) { 3164 pr_err("creating MR failed\n"); 3165 return -EIO; 3166 } 3167 3168 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3169 3170 of_node_put(eth_dn); 3171 3172 if (port) { 3173 for (i = 0; i < EHEA_MAX_PORTS; i++) 3174 if (!adapter->port[i]) { 3175 adapter->port[i] = port; 3176 break; 3177 } 3178 3179 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3180 logical_port_id); 3181 } else { 3182 ehea_remove_adapter_mr(adapter); 3183 return -EIO; 3184 } 3185 3186 return (ssize_t) count; 3187 } 3188 3189 static ssize_t ehea_remove_port(struct device *dev, 3190 struct device_attribute *attr, 3191 const char *buf, size_t count) 3192 { 3193 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3194 struct ehea_port *port; 3195 int i; 3196 u32 logical_port_id; 3197 3198 sscanf(buf, "%d", &logical_port_id); 3199 3200 port = ehea_get_port(adapter, logical_port_id); 3201 3202 if (port) { 3203 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3204 logical_port_id); 3205 3206 ehea_shutdown_single_port(port); 3207 3208 for (i = 0; i < EHEA_MAX_PORTS; i++) 3209 if (adapter->port[i] == port) { 3210 adapter->port[i] = NULL; 3211 break; 3212 } 3213 } else { 3214 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3215 logical_port_id); 3216 return -EINVAL; 3217 } 3218 3219 ehea_remove_adapter_mr(adapter); 3220 3221 return (ssize_t) count; 3222 } 3223 3224 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port); 3225 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port); 3226 3227 int ehea_create_device_sysfs(struct platform_device *dev) 3228 { 3229 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3230 if (ret) 3231 goto out; 3232 3233 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3234 out: 3235 return ret; 3236 } 3237 3238 void ehea_remove_device_sysfs(struct platform_device *dev) 3239 { 3240 device_remove_file(&dev->dev, &dev_attr_probe_port); 3241 device_remove_file(&dev->dev, &dev_attr_remove_port); 3242 } 3243 3244 static int __devinit ehea_probe_adapter(struct platform_device *dev, 3245 const struct of_device_id *id) 3246 { 3247 struct ehea_adapter *adapter; 3248 const u64 *adapter_handle; 3249 int ret; 3250 3251 if (!dev || !dev->dev.of_node) { 3252 pr_err("Invalid ibmebus device probed\n"); 3253 return -EINVAL; 3254 } 3255 3256 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); 3257 if (!adapter) { 3258 ret = -ENOMEM; 3259 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3260 goto out; 3261 } 3262 3263 list_add(&adapter->list, &adapter_list); 3264 3265 adapter->ofdev = dev; 3266 3267 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3268 NULL); 3269 if (adapter_handle) 3270 adapter->handle = *adapter_handle; 3271 3272 if (!adapter->handle) { 3273 dev_err(&dev->dev, "failed getting handle for adapter" 3274 " '%s'\n", dev->dev.of_node->full_name); 3275 ret = -ENODEV; 3276 goto out_free_ad; 3277 } 3278 3279 adapter->pd = EHEA_PD_ID; 3280 3281 dev_set_drvdata(&dev->dev, adapter); 3282 3283 3284 /* initialize adapter and ports */ 3285 /* get adapter properties */ 3286 ret = ehea_sense_adapter_attr(adapter); 3287 if (ret) { 3288 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3289 goto out_free_ad; 3290 } 3291 3292 adapter->neq = ehea_create_eq(adapter, 3293 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3294 if (!adapter->neq) { 3295 ret = -EIO; 3296 dev_err(&dev->dev, "NEQ creation failed\n"); 3297 goto out_free_ad; 3298 } 3299 3300 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, 3301 (unsigned long)adapter); 3302 3303 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3304 ehea_interrupt_neq, IRQF_DISABLED, 3305 "ehea_neq", adapter); 3306 if (ret) { 3307 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3308 goto out_kill_eq; 3309 } 3310 3311 ret = ehea_create_device_sysfs(dev); 3312 if (ret) 3313 goto out_free_irq; 3314 3315 ret = ehea_setup_ports(adapter); 3316 if (ret) { 3317 dev_err(&dev->dev, "setup_ports failed\n"); 3318 goto out_rem_dev_sysfs; 3319 } 3320 3321 ret = 0; 3322 goto out; 3323 3324 out_rem_dev_sysfs: 3325 ehea_remove_device_sysfs(dev); 3326 3327 out_free_irq: 3328 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3329 3330 out_kill_eq: 3331 ehea_destroy_eq(adapter->neq); 3332 3333 out_free_ad: 3334 list_del(&adapter->list); 3335 kfree(adapter); 3336 3337 out: 3338 ehea_update_firmware_handles(); 3339 3340 return ret; 3341 } 3342 3343 static int __devexit ehea_remove(struct platform_device *dev) 3344 { 3345 struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev); 3346 int i; 3347 3348 for (i = 0; i < EHEA_MAX_PORTS; i++) 3349 if (adapter->port[i]) { 3350 ehea_shutdown_single_port(adapter->port[i]); 3351 adapter->port[i] = NULL; 3352 } 3353 3354 ehea_remove_device_sysfs(dev); 3355 3356 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3357 tasklet_kill(&adapter->neq_tasklet); 3358 3359 ehea_destroy_eq(adapter->neq); 3360 ehea_remove_adapter_mr(adapter); 3361 list_del(&adapter->list); 3362 kfree(adapter); 3363 3364 ehea_update_firmware_handles(); 3365 3366 return 0; 3367 } 3368 3369 void ehea_crash_handler(void) 3370 { 3371 int i; 3372 3373 if (ehea_fw_handles.arr) 3374 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3375 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3376 ehea_fw_handles.arr[i].fwh, 3377 FORCE_FREE); 3378 3379 if (ehea_bcmc_regs.arr) 3380 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3381 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3382 ehea_bcmc_regs.arr[i].port_id, 3383 ehea_bcmc_regs.arr[i].reg_type, 3384 ehea_bcmc_regs.arr[i].macaddr, 3385 0, H_DEREG_BCMC); 3386 } 3387 3388 static int ehea_mem_notifier(struct notifier_block *nb, 3389 unsigned long action, void *data) 3390 { 3391 int ret = NOTIFY_BAD; 3392 struct memory_notify *arg = data; 3393 3394 mutex_lock(&dlpar_mem_lock); 3395 3396 switch (action) { 3397 case MEM_CANCEL_OFFLINE: 3398 pr_info("memory offlining canceled"); 3399 /* Readd canceled memory block */ 3400 case MEM_ONLINE: 3401 pr_info("memory is going online"); 3402 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3403 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3404 goto out_unlock; 3405 ehea_rereg_mrs(); 3406 break; 3407 case MEM_GOING_OFFLINE: 3408 pr_info("memory is going offline"); 3409 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3410 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3411 goto out_unlock; 3412 ehea_rereg_mrs(); 3413 break; 3414 default: 3415 break; 3416 } 3417 3418 ehea_update_firmware_handles(); 3419 ret = NOTIFY_OK; 3420 3421 out_unlock: 3422 mutex_unlock(&dlpar_mem_lock); 3423 return ret; 3424 } 3425 3426 static struct notifier_block ehea_mem_nb = { 3427 .notifier_call = ehea_mem_notifier, 3428 }; 3429 3430 static int ehea_reboot_notifier(struct notifier_block *nb, 3431 unsigned long action, void *unused) 3432 { 3433 if (action == SYS_RESTART) { 3434 pr_info("Reboot: freeing all eHEA resources\n"); 3435 ibmebus_unregister_driver(&ehea_driver); 3436 } 3437 return NOTIFY_DONE; 3438 } 3439 3440 static struct notifier_block ehea_reboot_nb = { 3441 .notifier_call = ehea_reboot_notifier, 3442 }; 3443 3444 static int check_module_parm(void) 3445 { 3446 int ret = 0; 3447 3448 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3449 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3450 pr_info("Bad parameter: rq1_entries\n"); 3451 ret = -EINVAL; 3452 } 3453 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3454 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3455 pr_info("Bad parameter: rq2_entries\n"); 3456 ret = -EINVAL; 3457 } 3458 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3459 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3460 pr_info("Bad parameter: rq3_entries\n"); 3461 ret = -EINVAL; 3462 } 3463 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3464 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3465 pr_info("Bad parameter: sq_entries\n"); 3466 ret = -EINVAL; 3467 } 3468 3469 return ret; 3470 } 3471 3472 static ssize_t ehea_show_capabilities(struct device_driver *drv, 3473 char *buf) 3474 { 3475 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3476 } 3477 3478 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH, 3479 ehea_show_capabilities, NULL); 3480 3481 int __init ehea_module_init(void) 3482 { 3483 int ret; 3484 3485 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3486 3487 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3488 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3489 3490 mutex_init(&ehea_fw_handles.lock); 3491 spin_lock_init(&ehea_bcmc_regs.lock); 3492 3493 ret = check_module_parm(); 3494 if (ret) 3495 goto out; 3496 3497 ret = ehea_create_busmap(); 3498 if (ret) 3499 goto out; 3500 3501 ret = register_reboot_notifier(&ehea_reboot_nb); 3502 if (ret) 3503 pr_info("failed registering reboot notifier\n"); 3504 3505 ret = register_memory_notifier(&ehea_mem_nb); 3506 if (ret) 3507 pr_info("failed registering memory remove notifier\n"); 3508 3509 ret = crash_shutdown_register(ehea_crash_handler); 3510 if (ret) 3511 pr_info("failed registering crash handler\n"); 3512 3513 ret = ibmebus_register_driver(&ehea_driver); 3514 if (ret) { 3515 pr_err("failed registering eHEA device driver on ebus\n"); 3516 goto out2; 3517 } 3518 3519 ret = driver_create_file(&ehea_driver.driver, 3520 &driver_attr_capabilities); 3521 if (ret) { 3522 pr_err("failed to register capabilities attribute, ret=%d\n", 3523 ret); 3524 goto out3; 3525 } 3526 3527 return ret; 3528 3529 out3: 3530 ibmebus_unregister_driver(&ehea_driver); 3531 out2: 3532 unregister_memory_notifier(&ehea_mem_nb); 3533 unregister_reboot_notifier(&ehea_reboot_nb); 3534 crash_shutdown_unregister(ehea_crash_handler); 3535 out: 3536 return ret; 3537 } 3538 3539 static void __exit ehea_module_exit(void) 3540 { 3541 int ret; 3542 3543 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3544 ibmebus_unregister_driver(&ehea_driver); 3545 unregister_reboot_notifier(&ehea_reboot_nb); 3546 ret = crash_shutdown_unregister(ehea_crash_handler); 3547 if (ret) 3548 pr_info("failed unregistering crash handler\n"); 3549 unregister_memory_notifier(&ehea_mem_nb); 3550 kfree(ehea_fw_handles.arr); 3551 kfree(ehea_bcmc_regs.arr); 3552 ehea_destroy_busmap(); 3553 } 3554 3555 module_init(ehea_module_init); 3556 module_exit(ehea_module_exit); 3557