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 static struct ehea_fw_handle_array ehea_fw_handles; 98 static 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 static void ehea_schedule_port_reset(struct ehea_port *port) 137 { 138 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags)) 139 schedule_work(&port->reset_task); 140 } 141 142 static void ehea_update_firmware_handles(void) 143 { 144 struct ehea_fw_handle_entry *arr = NULL; 145 struct ehea_adapter *adapter; 146 int num_adapters = 0; 147 int num_ports = 0; 148 int num_portres = 0; 149 int i = 0; 150 int num_fw_handles, k, l; 151 152 /* Determine number of handles */ 153 mutex_lock(&ehea_fw_handles.lock); 154 155 list_for_each_entry(adapter, &adapter_list, list) { 156 num_adapters++; 157 158 for (k = 0; k < EHEA_MAX_PORTS; k++) { 159 struct ehea_port *port = adapter->port[k]; 160 161 if (!port || (port->state != EHEA_PORT_UP)) 162 continue; 163 164 num_ports++; 165 num_portres += port->num_def_qps; 166 } 167 } 168 169 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES + 170 num_ports * EHEA_NUM_PORT_FW_HANDLES + 171 num_portres * EHEA_NUM_PORTRES_FW_HANDLES; 172 173 if (num_fw_handles) { 174 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL); 175 if (!arr) 176 goto out; /* Keep the existing array */ 177 } else 178 goto out_update; 179 180 list_for_each_entry(adapter, &adapter_list, list) { 181 if (num_adapters == 0) 182 break; 183 184 for (k = 0; k < EHEA_MAX_PORTS; k++) { 185 struct ehea_port *port = adapter->port[k]; 186 187 if (!port || (port->state != EHEA_PORT_UP) || 188 (num_ports == 0)) 189 continue; 190 191 for (l = 0; l < port->num_def_qps; l++) { 192 struct ehea_port_res *pr = &port->port_res[l]; 193 194 arr[i].adh = adapter->handle; 195 arr[i++].fwh = pr->qp->fw_handle; 196 arr[i].adh = adapter->handle; 197 arr[i++].fwh = pr->send_cq->fw_handle; 198 arr[i].adh = adapter->handle; 199 arr[i++].fwh = pr->recv_cq->fw_handle; 200 arr[i].adh = adapter->handle; 201 arr[i++].fwh = pr->eq->fw_handle; 202 arr[i].adh = adapter->handle; 203 arr[i++].fwh = pr->send_mr.handle; 204 arr[i].adh = adapter->handle; 205 arr[i++].fwh = pr->recv_mr.handle; 206 } 207 arr[i].adh = adapter->handle; 208 arr[i++].fwh = port->qp_eq->fw_handle; 209 num_ports--; 210 } 211 212 arr[i].adh = adapter->handle; 213 arr[i++].fwh = adapter->neq->fw_handle; 214 215 if (adapter->mr.handle) { 216 arr[i].adh = adapter->handle; 217 arr[i++].fwh = adapter->mr.handle; 218 } 219 num_adapters--; 220 } 221 222 out_update: 223 kfree(ehea_fw_handles.arr); 224 ehea_fw_handles.arr = arr; 225 ehea_fw_handles.num_entries = i; 226 out: 227 mutex_unlock(&ehea_fw_handles.lock); 228 } 229 230 static void ehea_update_bcmc_registrations(void) 231 { 232 unsigned long flags; 233 struct ehea_bcmc_reg_entry *arr = NULL; 234 struct ehea_adapter *adapter; 235 struct ehea_mc_list *mc_entry; 236 int num_registrations = 0; 237 int i = 0; 238 int k; 239 240 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags); 241 242 /* Determine number of registrations */ 243 list_for_each_entry(adapter, &adapter_list, list) 244 for (k = 0; k < EHEA_MAX_PORTS; k++) { 245 struct ehea_port *port = adapter->port[k]; 246 247 if (!port || (port->state != EHEA_PORT_UP)) 248 continue; 249 250 num_registrations += 2; /* Broadcast registrations */ 251 252 list_for_each_entry(mc_entry, &port->mc_list->list,list) 253 num_registrations += 2; 254 } 255 256 if (num_registrations) { 257 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC); 258 if (!arr) 259 goto out; /* Keep the existing array */ 260 } else 261 goto out_update; 262 263 list_for_each_entry(adapter, &adapter_list, list) { 264 for (k = 0; k < EHEA_MAX_PORTS; k++) { 265 struct ehea_port *port = adapter->port[k]; 266 267 if (!port || (port->state != EHEA_PORT_UP)) 268 continue; 269 270 if (num_registrations == 0) 271 goto out_update; 272 273 arr[i].adh = adapter->handle; 274 arr[i].port_id = port->logical_port_id; 275 arr[i].reg_type = EHEA_BCMC_BROADCAST | 276 EHEA_BCMC_UNTAGGED; 277 arr[i++].macaddr = port->mac_addr; 278 279 arr[i].adh = adapter->handle; 280 arr[i].port_id = port->logical_port_id; 281 arr[i].reg_type = EHEA_BCMC_BROADCAST | 282 EHEA_BCMC_VLANID_ALL; 283 arr[i++].macaddr = port->mac_addr; 284 num_registrations -= 2; 285 286 list_for_each_entry(mc_entry, 287 &port->mc_list->list, list) { 288 if (num_registrations == 0) 289 goto out_update; 290 291 arr[i].adh = adapter->handle; 292 arr[i].port_id = port->logical_port_id; 293 arr[i].reg_type = EHEA_BCMC_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, 375 round_jiffies_relative(msecs_to_jiffies(1000))); 376 } 377 378 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) 379 { 380 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 381 struct net_device *dev = pr->port->netdev; 382 int max_index_mask = pr->rq1_skba.len - 1; 383 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; 384 int adder = 0; 385 int i; 386 387 pr->rq1_skba.os_skbs = 0; 388 389 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 390 if (nr_of_wqes > 0) 391 pr->rq1_skba.index = index; 392 pr->rq1_skba.os_skbs = fill_wqes; 393 return; 394 } 395 396 for (i = 0; i < fill_wqes; i++) { 397 if (!skb_arr_rq1[index]) { 398 skb_arr_rq1[index] = netdev_alloc_skb(dev, 399 EHEA_L_PKT_SIZE); 400 if (!skb_arr_rq1[index]) { 401 netdev_info(dev, "Unable to allocate enough skb in the array\n"); 402 pr->rq1_skba.os_skbs = fill_wqes - i; 403 break; 404 } 405 } 406 index--; 407 index &= max_index_mask; 408 adder++; 409 } 410 411 if (adder == 0) 412 return; 413 414 /* Ring doorbell */ 415 ehea_update_rq1a(pr->qp, adder); 416 } 417 418 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) 419 { 420 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 421 struct net_device *dev = pr->port->netdev; 422 int i; 423 424 if (nr_rq1a > pr->rq1_skba.len) { 425 netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); 426 return; 427 } 428 429 for (i = 0; i < nr_rq1a; i++) { 430 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); 431 if (!skb_arr_rq1[i]) { 432 netdev_info(dev, "Not enough memory to allocate skb array\n"); 433 break; 434 } 435 } 436 /* Ring doorbell */ 437 ehea_update_rq1a(pr->qp, i - 1); 438 } 439 440 static int ehea_refill_rq_def(struct ehea_port_res *pr, 441 struct ehea_q_skb_arr *q_skba, int rq_nr, 442 int num_wqes, int wqe_type, int packet_size) 443 { 444 struct net_device *dev = pr->port->netdev; 445 struct ehea_qp *qp = pr->qp; 446 struct sk_buff **skb_arr = q_skba->arr; 447 struct ehea_rwqe *rwqe; 448 int i, index, max_index_mask, fill_wqes; 449 int adder = 0; 450 int ret = 0; 451 452 fill_wqes = q_skba->os_skbs + num_wqes; 453 q_skba->os_skbs = 0; 454 455 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 456 q_skba->os_skbs = fill_wqes; 457 return ret; 458 } 459 460 index = q_skba->index; 461 max_index_mask = q_skba->len - 1; 462 for (i = 0; i < fill_wqes; i++) { 463 u64 tmp_addr; 464 struct sk_buff *skb; 465 466 skb = netdev_alloc_skb_ip_align(dev, packet_size); 467 if (!skb) { 468 q_skba->os_skbs = fill_wqes - i; 469 if (q_skba->os_skbs == q_skba->len - 2) { 470 netdev_info(pr->port->netdev, 471 "rq%i ran dry - no mem for skb\n", 472 rq_nr); 473 ret = -ENOMEM; 474 } 475 break; 476 } 477 478 skb_arr[index] = skb; 479 tmp_addr = ehea_map_vaddr(skb->data); 480 if (tmp_addr == -1) { 481 dev_kfree_skb(skb); 482 q_skba->os_skbs = fill_wqes - i; 483 ret = 0; 484 break; 485 } 486 487 rwqe = ehea_get_next_rwqe(qp, rq_nr); 488 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type) 489 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index); 490 rwqe->sg_list[0].l_key = pr->recv_mr.lkey; 491 rwqe->sg_list[0].vaddr = tmp_addr; 492 rwqe->sg_list[0].len = packet_size; 493 rwqe->data_segments = 1; 494 495 index++; 496 index &= max_index_mask; 497 adder++; 498 } 499 500 q_skba->index = index; 501 if (adder == 0) 502 goto out; 503 504 /* Ring doorbell */ 505 iosync(); 506 if (rq_nr == 2) 507 ehea_update_rq2a(pr->qp, adder); 508 else 509 ehea_update_rq3a(pr->qp, adder); 510 out: 511 return ret; 512 } 513 514 515 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) 516 { 517 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, 518 nr_of_wqes, EHEA_RWQE2_TYPE, 519 EHEA_RQ2_PKT_SIZE); 520 } 521 522 523 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) 524 { 525 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, 526 nr_of_wqes, EHEA_RWQE3_TYPE, 527 EHEA_MAX_PACKET_SIZE); 528 } 529 530 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) 531 { 532 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; 533 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) 534 return 0; 535 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && 536 (cqe->header_length == 0)) 537 return 0; 538 return -EINVAL; 539 } 540 541 static inline void ehea_fill_skb(struct net_device *dev, 542 struct sk_buff *skb, struct ehea_cqe *cqe, 543 struct ehea_port_res *pr) 544 { 545 int length = cqe->num_bytes_transfered - 4; /*remove CRC */ 546 547 skb_put(skb, length); 548 skb->protocol = eth_type_trans(skb, dev); 549 550 /* The packet was not an IPV4 packet so a complemented checksum was 551 calculated. The value is found in the Internet Checksum field. */ 552 if (cqe->status & EHEA_CQE_BLIND_CKSUM) { 553 skb->ip_summed = CHECKSUM_COMPLETE; 554 skb->csum = csum_unfold(~cqe->inet_checksum_value); 555 } else 556 skb->ip_summed = CHECKSUM_UNNECESSARY; 557 558 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]); 559 } 560 561 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, 562 int arr_len, 563 struct ehea_cqe *cqe) 564 { 565 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 566 struct sk_buff *skb; 567 void *pref; 568 int x; 569 570 x = skb_index + 1; 571 x &= (arr_len - 1); 572 573 pref = skb_array[x]; 574 if (pref) { 575 prefetchw(pref); 576 prefetchw(pref + EHEA_CACHE_LINE); 577 578 pref = (skb_array[x]->data); 579 prefetch(pref); 580 prefetch(pref + EHEA_CACHE_LINE); 581 prefetch(pref + EHEA_CACHE_LINE * 2); 582 prefetch(pref + EHEA_CACHE_LINE * 3); 583 } 584 585 skb = skb_array[skb_index]; 586 skb_array[skb_index] = NULL; 587 return skb; 588 } 589 590 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, 591 int arr_len, int wqe_index) 592 { 593 struct sk_buff *skb; 594 void *pref; 595 int x; 596 597 x = wqe_index + 1; 598 x &= (arr_len - 1); 599 600 pref = skb_array[x]; 601 if (pref) { 602 prefetchw(pref); 603 prefetchw(pref + EHEA_CACHE_LINE); 604 605 pref = (skb_array[x]->data); 606 prefetchw(pref); 607 prefetchw(pref + EHEA_CACHE_LINE); 608 } 609 610 skb = skb_array[wqe_index]; 611 skb_array[wqe_index] = NULL; 612 return skb; 613 } 614 615 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, 616 struct ehea_cqe *cqe, int *processed_rq2, 617 int *processed_rq3) 618 { 619 struct sk_buff *skb; 620 621 if (cqe->status & EHEA_CQE_STAT_ERR_TCP) 622 pr->p_stats.err_tcp_cksum++; 623 if (cqe->status & EHEA_CQE_STAT_ERR_IP) 624 pr->p_stats.err_ip_cksum++; 625 if (cqe->status & EHEA_CQE_STAT_ERR_CRC) 626 pr->p_stats.err_frame_crc++; 627 628 if (rq == 2) { 629 *processed_rq2 += 1; 630 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe); 631 dev_kfree_skb(skb); 632 } else if (rq == 3) { 633 *processed_rq3 += 1; 634 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe); 635 dev_kfree_skb(skb); 636 } 637 638 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) { 639 if (netif_msg_rx_err(pr->port)) { 640 pr_err("Critical receive error for QP %d. Resetting port.\n", 641 pr->qp->init_attr.qp_nr); 642 ehea_dump(cqe, sizeof(*cqe), "CQE"); 643 } 644 ehea_schedule_port_reset(pr->port); 645 return 1; 646 } 647 648 return 0; 649 } 650 651 static int ehea_proc_rwqes(struct net_device *dev, 652 struct ehea_port_res *pr, 653 int budget) 654 { 655 struct ehea_port *port = pr->port; 656 struct ehea_qp *qp = pr->qp; 657 struct ehea_cqe *cqe; 658 struct sk_buff *skb; 659 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 660 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; 661 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; 662 int skb_arr_rq1_len = pr->rq1_skba.len; 663 int skb_arr_rq2_len = pr->rq2_skba.len; 664 int skb_arr_rq3_len = pr->rq3_skba.len; 665 int processed, processed_rq1, processed_rq2, processed_rq3; 666 u64 processed_bytes = 0; 667 int wqe_index, last_wqe_index, rq, port_reset; 668 669 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; 670 last_wqe_index = 0; 671 672 cqe = ehea_poll_rq1(qp, &wqe_index); 673 while ((processed < budget) && cqe) { 674 ehea_inc_rq1(qp); 675 processed_rq1++; 676 processed++; 677 if (netif_msg_rx_status(port)) 678 ehea_dump(cqe, sizeof(*cqe), "CQE"); 679 680 last_wqe_index = wqe_index; 681 rmb(); 682 if (!ehea_check_cqe(cqe, &rq)) { 683 if (rq == 1) { 684 /* LL RQ1 */ 685 skb = get_skb_by_index_ll(skb_arr_rq1, 686 skb_arr_rq1_len, 687 wqe_index); 688 if (unlikely(!skb)) { 689 netif_info(port, rx_err, dev, 690 "LL rq1: skb=NULL\n"); 691 692 skb = netdev_alloc_skb(dev, 693 EHEA_L_PKT_SIZE); 694 if (!skb) { 695 netdev_err(dev, "Not enough memory to allocate skb\n"); 696 break; 697 } 698 } 699 skb_copy_to_linear_data(skb, ((char *)cqe) + 64, 700 cqe->num_bytes_transfered - 4); 701 ehea_fill_skb(dev, skb, cqe, pr); 702 } else if (rq == 2) { 703 /* RQ2 */ 704 skb = get_skb_by_index(skb_arr_rq2, 705 skb_arr_rq2_len, cqe); 706 if (unlikely(!skb)) { 707 netif_err(port, rx_err, dev, 708 "rq2: skb=NULL\n"); 709 break; 710 } 711 ehea_fill_skb(dev, skb, cqe, pr); 712 processed_rq2++; 713 } else { 714 /* RQ3 */ 715 skb = get_skb_by_index(skb_arr_rq3, 716 skb_arr_rq3_len, cqe); 717 if (unlikely(!skb)) { 718 netif_err(port, rx_err, dev, 719 "rq3: skb=NULL\n"); 720 break; 721 } 722 ehea_fill_skb(dev, skb, cqe, pr); 723 processed_rq3++; 724 } 725 726 processed_bytes += skb->len; 727 728 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 729 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag); 730 731 napi_gro_receive(&pr->napi, skb); 732 } else { 733 pr->p_stats.poll_receive_errors++; 734 port_reset = ehea_treat_poll_error(pr, rq, cqe, 735 &processed_rq2, 736 &processed_rq3); 737 if (port_reset) 738 break; 739 } 740 cqe = ehea_poll_rq1(qp, &wqe_index); 741 } 742 743 pr->rx_packets += processed; 744 pr->rx_bytes += processed_bytes; 745 746 ehea_refill_rq1(pr, last_wqe_index, processed_rq1); 747 ehea_refill_rq2(pr, processed_rq2); 748 ehea_refill_rq3(pr, processed_rq3); 749 750 return processed; 751 } 752 753 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull 754 755 static void reset_sq_restart_flag(struct ehea_port *port) 756 { 757 int i; 758 759 for (i = 0; i < port->num_def_qps; i++) { 760 struct ehea_port_res *pr = &port->port_res[i]; 761 pr->sq_restart_flag = 0; 762 } 763 wake_up(&port->restart_wq); 764 } 765 766 static void check_sqs(struct ehea_port *port) 767 { 768 struct ehea_swqe *swqe; 769 int swqe_index; 770 int i, k; 771 772 for (i = 0; i < port->num_def_qps; i++) { 773 struct ehea_port_res *pr = &port->port_res[i]; 774 int ret; 775 k = 0; 776 swqe = ehea_get_swqe(pr->qp, &swqe_index); 777 memset(swqe, 0, SWQE_HEADER_SIZE); 778 atomic_dec(&pr->swqe_avail); 779 780 swqe->tx_control |= EHEA_SWQE_PURGE; 781 swqe->wr_id = SWQE_RESTART_CHECK; 782 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 783 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; 784 swqe->immediate_data_length = 80; 785 786 ehea_post_swqe(pr->qp, swqe); 787 788 ret = wait_event_timeout(port->restart_wq, 789 pr->sq_restart_flag == 0, 790 msecs_to_jiffies(100)); 791 792 if (!ret) { 793 pr_err("HW/SW queues out of sync\n"); 794 ehea_schedule_port_reset(pr->port); 795 return; 796 } 797 } 798 } 799 800 801 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) 802 { 803 struct sk_buff *skb; 804 struct ehea_cq *send_cq = pr->send_cq; 805 struct ehea_cqe *cqe; 806 int quota = my_quota; 807 int cqe_counter = 0; 808 int swqe_av = 0; 809 int index; 810 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, 811 pr - &pr->port->port_res[0]); 812 813 cqe = ehea_poll_cq(send_cq); 814 while (cqe && (quota > 0)) { 815 ehea_inc_cq(send_cq); 816 817 cqe_counter++; 818 rmb(); 819 820 if (cqe->wr_id == SWQE_RESTART_CHECK) { 821 pr->sq_restart_flag = 1; 822 swqe_av++; 823 break; 824 } 825 826 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { 827 pr_err("Bad send completion status=0x%04X\n", 828 cqe->status); 829 830 if (netif_msg_tx_err(pr->port)) 831 ehea_dump(cqe, sizeof(*cqe), "Send CQE"); 832 833 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { 834 pr_err("Resetting port\n"); 835 ehea_schedule_port_reset(pr->port); 836 break; 837 } 838 } 839 840 if (netif_msg_tx_done(pr->port)) 841 ehea_dump(cqe, sizeof(*cqe), "CQE"); 842 843 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) 844 == EHEA_SWQE2_TYPE)) { 845 846 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 847 skb = pr->sq_skba.arr[index]; 848 dev_kfree_skb(skb); 849 pr->sq_skba.arr[index] = NULL; 850 } 851 852 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); 853 quota--; 854 855 cqe = ehea_poll_cq(send_cq); 856 } 857 858 ehea_update_feca(send_cq, cqe_counter); 859 atomic_add(swqe_av, &pr->swqe_avail); 860 861 if (unlikely(netif_tx_queue_stopped(txq) && 862 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { 863 __netif_tx_lock(txq, smp_processor_id()); 864 if (netif_tx_queue_stopped(txq) && 865 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) 866 netif_tx_wake_queue(txq); 867 __netif_tx_unlock(txq); 868 } 869 870 wake_up(&pr->port->swqe_avail_wq); 871 872 return cqe; 873 } 874 875 #define EHEA_POLL_MAX_CQES 65535 876 877 static int ehea_poll(struct napi_struct *napi, int budget) 878 { 879 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, 880 napi); 881 struct net_device *dev = pr->port->netdev; 882 struct ehea_cqe *cqe; 883 struct ehea_cqe *cqe_skb = NULL; 884 int wqe_index; 885 int rx = 0; 886 887 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 888 rx += ehea_proc_rwqes(dev, pr, budget - rx); 889 890 while (rx != budget) { 891 napi_complete(napi); 892 ehea_reset_cq_ep(pr->recv_cq); 893 ehea_reset_cq_ep(pr->send_cq); 894 ehea_reset_cq_n1(pr->recv_cq); 895 ehea_reset_cq_n1(pr->send_cq); 896 rmb(); 897 cqe = ehea_poll_rq1(pr->qp, &wqe_index); 898 cqe_skb = ehea_poll_cq(pr->send_cq); 899 900 if (!cqe && !cqe_skb) 901 return rx; 902 903 if (!napi_reschedule(napi)) 904 return rx; 905 906 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 907 rx += ehea_proc_rwqes(dev, pr, budget - rx); 908 } 909 910 return rx; 911 } 912 913 #ifdef CONFIG_NET_POLL_CONTROLLER 914 static void ehea_netpoll(struct net_device *dev) 915 { 916 struct ehea_port *port = netdev_priv(dev); 917 int i; 918 919 for (i = 0; i < port->num_def_qps; i++) 920 napi_schedule(&port->port_res[i].napi); 921 } 922 #endif 923 924 static irqreturn_t ehea_recv_irq_handler(int irq, void *param) 925 { 926 struct ehea_port_res *pr = param; 927 928 napi_schedule(&pr->napi); 929 930 return IRQ_HANDLED; 931 } 932 933 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) 934 { 935 struct ehea_port *port = param; 936 struct ehea_eqe *eqe; 937 struct ehea_qp *qp; 938 u32 qp_token; 939 u64 resource_type, aer, aerr; 940 int reset_port = 0; 941 942 eqe = ehea_poll_eq(port->qp_eq); 943 944 while (eqe) { 945 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); 946 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", 947 eqe->entry, qp_token); 948 949 qp = port->port_res[qp_token].qp; 950 951 resource_type = ehea_error_data(port->adapter, qp->fw_handle, 952 &aer, &aerr); 953 954 if (resource_type == EHEA_AER_RESTYPE_QP) { 955 if ((aer & EHEA_AER_RESET_MASK) || 956 (aerr & EHEA_AERR_RESET_MASK)) 957 reset_port = 1; 958 } else 959 reset_port = 1; /* Reset in case of CQ or EQ error */ 960 961 eqe = ehea_poll_eq(port->qp_eq); 962 } 963 964 if (reset_port) { 965 pr_err("Resetting port\n"); 966 ehea_schedule_port_reset(port); 967 } 968 969 return IRQ_HANDLED; 970 } 971 972 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, 973 int logical_port) 974 { 975 int i; 976 977 for (i = 0; i < EHEA_MAX_PORTS; i++) 978 if (adapter->port[i]) 979 if (adapter->port[i]->logical_port_id == logical_port) 980 return adapter->port[i]; 981 return NULL; 982 } 983 984 int ehea_sense_port_attr(struct ehea_port *port) 985 { 986 int ret; 987 u64 hret; 988 struct hcp_ehea_port_cb0 *cb0; 989 990 /* may be called via ehea_neq_tasklet() */ 991 cb0 = (void *)get_zeroed_page(GFP_ATOMIC); 992 if (!cb0) { 993 pr_err("no mem for cb0\n"); 994 ret = -ENOMEM; 995 goto out; 996 } 997 998 hret = ehea_h_query_ehea_port(port->adapter->handle, 999 port->logical_port_id, H_PORT_CB0, 1000 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), 1001 cb0); 1002 if (hret != H_SUCCESS) { 1003 ret = -EIO; 1004 goto out_free; 1005 } 1006 1007 /* MAC address */ 1008 port->mac_addr = cb0->port_mac_addr << 16; 1009 1010 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { 1011 ret = -EADDRNOTAVAIL; 1012 goto out_free; 1013 } 1014 1015 /* Port speed */ 1016 switch (cb0->port_speed) { 1017 case H_SPEED_10M_H: 1018 port->port_speed = EHEA_SPEED_10M; 1019 port->full_duplex = 0; 1020 break; 1021 case H_SPEED_10M_F: 1022 port->port_speed = EHEA_SPEED_10M; 1023 port->full_duplex = 1; 1024 break; 1025 case H_SPEED_100M_H: 1026 port->port_speed = EHEA_SPEED_100M; 1027 port->full_duplex = 0; 1028 break; 1029 case H_SPEED_100M_F: 1030 port->port_speed = EHEA_SPEED_100M; 1031 port->full_duplex = 1; 1032 break; 1033 case H_SPEED_1G_F: 1034 port->port_speed = EHEA_SPEED_1G; 1035 port->full_duplex = 1; 1036 break; 1037 case H_SPEED_10G_F: 1038 port->port_speed = EHEA_SPEED_10G; 1039 port->full_duplex = 1; 1040 break; 1041 default: 1042 port->port_speed = 0; 1043 port->full_duplex = 0; 1044 break; 1045 } 1046 1047 port->autoneg = 1; 1048 port->num_mcs = cb0->num_default_qps; 1049 1050 /* Number of default QPs */ 1051 if (use_mcs) 1052 port->num_def_qps = cb0->num_default_qps; 1053 else 1054 port->num_def_qps = 1; 1055 1056 if (!port->num_def_qps) { 1057 ret = -EINVAL; 1058 goto out_free; 1059 } 1060 1061 ret = 0; 1062 out_free: 1063 if (ret || netif_msg_probe(port)) 1064 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); 1065 free_page((unsigned long)cb0); 1066 out: 1067 return ret; 1068 } 1069 1070 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) 1071 { 1072 struct hcp_ehea_port_cb4 *cb4; 1073 u64 hret; 1074 int ret = 0; 1075 1076 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 1077 if (!cb4) { 1078 pr_err("no mem for cb4\n"); 1079 ret = -ENOMEM; 1080 goto out; 1081 } 1082 1083 cb4->port_speed = port_speed; 1084 1085 netif_carrier_off(port->netdev); 1086 1087 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1088 port->logical_port_id, 1089 H_PORT_CB4, H_PORT_CB4_SPEED, cb4); 1090 if (hret == H_SUCCESS) { 1091 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; 1092 1093 hret = ehea_h_query_ehea_port(port->adapter->handle, 1094 port->logical_port_id, 1095 H_PORT_CB4, H_PORT_CB4_SPEED, 1096 cb4); 1097 if (hret == H_SUCCESS) { 1098 switch (cb4->port_speed) { 1099 case H_SPEED_10M_H: 1100 port->port_speed = EHEA_SPEED_10M; 1101 port->full_duplex = 0; 1102 break; 1103 case H_SPEED_10M_F: 1104 port->port_speed = EHEA_SPEED_10M; 1105 port->full_duplex = 1; 1106 break; 1107 case H_SPEED_100M_H: 1108 port->port_speed = EHEA_SPEED_100M; 1109 port->full_duplex = 0; 1110 break; 1111 case H_SPEED_100M_F: 1112 port->port_speed = EHEA_SPEED_100M; 1113 port->full_duplex = 1; 1114 break; 1115 case H_SPEED_1G_F: 1116 port->port_speed = EHEA_SPEED_1G; 1117 port->full_duplex = 1; 1118 break; 1119 case H_SPEED_10G_F: 1120 port->port_speed = EHEA_SPEED_10G; 1121 port->full_duplex = 1; 1122 break; 1123 default: 1124 port->port_speed = 0; 1125 port->full_duplex = 0; 1126 break; 1127 } 1128 } else { 1129 pr_err("Failed sensing port speed\n"); 1130 ret = -EIO; 1131 } 1132 } else { 1133 if (hret == H_AUTHORITY) { 1134 pr_info("Hypervisor denied setting port speed\n"); 1135 ret = -EPERM; 1136 } else { 1137 ret = -EIO; 1138 pr_err("Failed setting port speed\n"); 1139 } 1140 } 1141 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) 1142 netif_carrier_on(port->netdev); 1143 1144 free_page((unsigned long)cb4); 1145 out: 1146 return ret; 1147 } 1148 1149 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) 1150 { 1151 int ret; 1152 u8 ec; 1153 u8 portnum; 1154 struct ehea_port *port; 1155 struct net_device *dev; 1156 1157 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); 1158 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); 1159 port = ehea_get_port(adapter, portnum); 1160 dev = port->netdev; 1161 1162 switch (ec) { 1163 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1164 1165 if (!port) { 1166 netdev_err(dev, "unknown portnum %x\n", portnum); 1167 break; 1168 } 1169 1170 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1171 if (!netif_carrier_ok(dev)) { 1172 ret = ehea_sense_port_attr(port); 1173 if (ret) { 1174 netdev_err(dev, "failed resensing port attributes\n"); 1175 break; 1176 } 1177 1178 netif_info(port, link, dev, 1179 "Logical port up: %dMbps %s Duplex\n", 1180 port->port_speed, 1181 port->full_duplex == 1 ? 1182 "Full" : "Half"); 1183 1184 netif_carrier_on(dev); 1185 netif_wake_queue(dev); 1186 } 1187 } else 1188 if (netif_carrier_ok(dev)) { 1189 netif_info(port, link, dev, 1190 "Logical port down\n"); 1191 netif_carrier_off(dev); 1192 netif_tx_disable(dev); 1193 } 1194 1195 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1196 port->phy_link = EHEA_PHY_LINK_UP; 1197 netif_info(port, link, dev, 1198 "Physical port up\n"); 1199 if (prop_carrier_state) 1200 netif_carrier_on(dev); 1201 } else { 1202 port->phy_link = EHEA_PHY_LINK_DOWN; 1203 netif_info(port, link, dev, 1204 "Physical port down\n"); 1205 if (prop_carrier_state) 1206 netif_carrier_off(dev); 1207 } 1208 1209 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1210 netdev_info(dev, 1211 "External switch port is primary port\n"); 1212 else 1213 netdev_info(dev, 1214 "External switch port is backup port\n"); 1215 1216 break; 1217 case EHEA_EC_ADAPTER_MALFUNC: 1218 netdev_err(dev, "Adapter malfunction\n"); 1219 break; 1220 case EHEA_EC_PORT_MALFUNC: 1221 netdev_info(dev, "Port malfunction\n"); 1222 netif_carrier_off(dev); 1223 netif_tx_disable(dev); 1224 break; 1225 default: 1226 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1227 break; 1228 } 1229 } 1230 1231 static void ehea_neq_tasklet(unsigned long data) 1232 { 1233 struct ehea_adapter *adapter = (struct ehea_adapter *)data; 1234 struct ehea_eqe *eqe; 1235 u64 event_mask; 1236 1237 eqe = ehea_poll_eq(adapter->neq); 1238 pr_debug("eqe=%p\n", eqe); 1239 1240 while (eqe) { 1241 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1242 ehea_parse_eqe(adapter, eqe->entry); 1243 eqe = ehea_poll_eq(adapter->neq); 1244 pr_debug("next eqe=%p\n", eqe); 1245 } 1246 1247 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1248 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1249 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1250 1251 ehea_h_reset_events(adapter->handle, 1252 adapter->neq->fw_handle, event_mask); 1253 } 1254 1255 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1256 { 1257 struct ehea_adapter *adapter = param; 1258 tasklet_hi_schedule(&adapter->neq_tasklet); 1259 return IRQ_HANDLED; 1260 } 1261 1262 1263 static int ehea_fill_port_res(struct ehea_port_res *pr) 1264 { 1265 int ret; 1266 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1267 1268 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1269 1270 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1271 1272 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1273 1274 return ret; 1275 } 1276 1277 static int ehea_reg_interrupts(struct net_device *dev) 1278 { 1279 struct ehea_port *port = netdev_priv(dev); 1280 struct ehea_port_res *pr; 1281 int i, ret; 1282 1283 1284 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1285 dev->name); 1286 1287 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1288 ehea_qp_aff_irq_handler, 1289 IRQF_DISABLED, port->int_aff_name, port); 1290 if (ret) { 1291 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1292 port->qp_eq->attr.ist1); 1293 goto out_free_qpeq; 1294 } 1295 1296 netif_info(port, ifup, dev, 1297 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1298 port->qp_eq->attr.ist1); 1299 1300 1301 for (i = 0; i < port->num_def_qps; i++) { 1302 pr = &port->port_res[i]; 1303 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1304 "%s-queue%d", dev->name, i); 1305 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1306 ehea_recv_irq_handler, 1307 IRQF_DISABLED, pr->int_send_name, 1308 pr); 1309 if (ret) { 1310 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1311 i, pr->eq->attr.ist1); 1312 goto out_free_req; 1313 } 1314 netif_info(port, ifup, dev, 1315 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1316 pr->eq->attr.ist1, i); 1317 } 1318 out: 1319 return ret; 1320 1321 1322 out_free_req: 1323 while (--i >= 0) { 1324 u32 ist = port->port_res[i].eq->attr.ist1; 1325 ibmebus_free_irq(ist, &port->port_res[i]); 1326 } 1327 1328 out_free_qpeq: 1329 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1330 i = port->num_def_qps; 1331 1332 goto out; 1333 1334 } 1335 1336 static void ehea_free_interrupts(struct net_device *dev) 1337 { 1338 struct ehea_port *port = netdev_priv(dev); 1339 struct ehea_port_res *pr; 1340 int i; 1341 1342 /* send */ 1343 1344 for (i = 0; i < port->num_def_qps; i++) { 1345 pr = &port->port_res[i]; 1346 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1347 netif_info(port, intr, dev, 1348 "free send irq for res %d with handle 0x%X\n", 1349 i, pr->eq->attr.ist1); 1350 } 1351 1352 /* associated events */ 1353 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1354 netif_info(port, intr, dev, 1355 "associated event interrupt for handle 0x%X freed\n", 1356 port->qp_eq->attr.ist1); 1357 } 1358 1359 static int ehea_configure_port(struct ehea_port *port) 1360 { 1361 int ret, i; 1362 u64 hret, mask; 1363 struct hcp_ehea_port_cb0 *cb0; 1364 1365 ret = -ENOMEM; 1366 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1367 if (!cb0) 1368 goto out; 1369 1370 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1371 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1372 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1373 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1374 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1375 PXLY_RC_VLAN_FILTER) 1376 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1377 1378 for (i = 0; i < port->num_mcs; i++) 1379 if (use_mcs) 1380 cb0->default_qpn_arr[i] = 1381 port->port_res[i].qp->init_attr.qp_nr; 1382 else 1383 cb0->default_qpn_arr[i] = 1384 port->port_res[0].qp->init_attr.qp_nr; 1385 1386 if (netif_msg_ifup(port)) 1387 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1388 1389 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1390 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1391 1392 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1393 port->logical_port_id, 1394 H_PORT_CB0, mask, cb0); 1395 ret = -EIO; 1396 if (hret != H_SUCCESS) 1397 goto out_free; 1398 1399 ret = 0; 1400 1401 out_free: 1402 free_page((unsigned long)cb0); 1403 out: 1404 return ret; 1405 } 1406 1407 static int ehea_gen_smrs(struct ehea_port_res *pr) 1408 { 1409 int ret; 1410 struct ehea_adapter *adapter = pr->port->adapter; 1411 1412 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1413 if (ret) 1414 goto out; 1415 1416 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1417 if (ret) 1418 goto out_free; 1419 1420 return 0; 1421 1422 out_free: 1423 ehea_rem_mr(&pr->send_mr); 1424 out: 1425 pr_err("Generating SMRS failed\n"); 1426 return -EIO; 1427 } 1428 1429 static int ehea_rem_smrs(struct ehea_port_res *pr) 1430 { 1431 if ((ehea_rem_mr(&pr->send_mr)) || 1432 (ehea_rem_mr(&pr->recv_mr))) 1433 return -EIO; 1434 else 1435 return 0; 1436 } 1437 1438 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1439 { 1440 int arr_size = sizeof(void *) * max_q_entries; 1441 1442 q_skba->arr = vzalloc(arr_size); 1443 if (!q_skba->arr) 1444 return -ENOMEM; 1445 1446 q_skba->len = max_q_entries; 1447 q_skba->index = 0; 1448 q_skba->os_skbs = 0; 1449 1450 return 0; 1451 } 1452 1453 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1454 struct port_res_cfg *pr_cfg, int queue_token) 1455 { 1456 struct ehea_adapter *adapter = port->adapter; 1457 enum ehea_eq_type eq_type = EHEA_EQ; 1458 struct ehea_qp_init_attr *init_attr = NULL; 1459 int ret = -EIO; 1460 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1461 1462 tx_bytes = pr->tx_bytes; 1463 tx_packets = pr->tx_packets; 1464 rx_bytes = pr->rx_bytes; 1465 rx_packets = pr->rx_packets; 1466 1467 memset(pr, 0, sizeof(struct ehea_port_res)); 1468 1469 pr->tx_bytes = rx_bytes; 1470 pr->tx_packets = tx_packets; 1471 pr->rx_bytes = rx_bytes; 1472 pr->rx_packets = rx_packets; 1473 1474 pr->port = port; 1475 1476 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1477 if (!pr->eq) { 1478 pr_err("create_eq failed (eq)\n"); 1479 goto out_free; 1480 } 1481 1482 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1483 pr->eq->fw_handle, 1484 port->logical_port_id); 1485 if (!pr->recv_cq) { 1486 pr_err("create_cq failed (cq_recv)\n"); 1487 goto out_free; 1488 } 1489 1490 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1491 pr->eq->fw_handle, 1492 port->logical_port_id); 1493 if (!pr->send_cq) { 1494 pr_err("create_cq failed (cq_send)\n"); 1495 goto out_free; 1496 } 1497 1498 if (netif_msg_ifup(port)) 1499 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1500 pr->send_cq->attr.act_nr_of_cqes, 1501 pr->recv_cq->attr.act_nr_of_cqes); 1502 1503 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1504 if (!init_attr) { 1505 ret = -ENOMEM; 1506 pr_err("no mem for ehea_qp_init_attr\n"); 1507 goto out_free; 1508 } 1509 1510 init_attr->low_lat_rq1 = 1; 1511 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1512 init_attr->rq_count = 3; 1513 init_attr->qp_token = queue_token; 1514 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1515 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1516 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1517 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1518 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1519 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1520 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1521 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1522 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1523 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1524 init_attr->port_nr = port->logical_port_id; 1525 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1526 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1527 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1528 1529 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1530 if (!pr->qp) { 1531 pr_err("create_qp failed\n"); 1532 ret = -EIO; 1533 goto out_free; 1534 } 1535 1536 if (netif_msg_ifup(port)) 1537 pr_info("QP: qp_nr=%d\n act_nr_snd_wqe=%d\n nr_rwqe_rq1=%d\n nr_rwqe_rq2=%d\n nr_rwqe_rq3=%d\n", 1538 init_attr->qp_nr, 1539 init_attr->act_nr_send_wqes, 1540 init_attr->act_nr_rwqes_rq1, 1541 init_attr->act_nr_rwqes_rq2, 1542 init_attr->act_nr_rwqes_rq3); 1543 1544 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1545 1546 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1547 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1548 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1549 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1550 if (ret) 1551 goto out_free; 1552 1553 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1554 if (ehea_gen_smrs(pr) != 0) { 1555 ret = -EIO; 1556 goto out_free; 1557 } 1558 1559 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1560 1561 kfree(init_attr); 1562 1563 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); 1564 1565 ret = 0; 1566 goto out; 1567 1568 out_free: 1569 kfree(init_attr); 1570 vfree(pr->sq_skba.arr); 1571 vfree(pr->rq1_skba.arr); 1572 vfree(pr->rq2_skba.arr); 1573 vfree(pr->rq3_skba.arr); 1574 ehea_destroy_qp(pr->qp); 1575 ehea_destroy_cq(pr->send_cq); 1576 ehea_destroy_cq(pr->recv_cq); 1577 ehea_destroy_eq(pr->eq); 1578 out: 1579 return ret; 1580 } 1581 1582 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1583 { 1584 int ret, i; 1585 1586 if (pr->qp) 1587 netif_napi_del(&pr->napi); 1588 1589 ret = ehea_destroy_qp(pr->qp); 1590 1591 if (!ret) { 1592 ehea_destroy_cq(pr->send_cq); 1593 ehea_destroy_cq(pr->recv_cq); 1594 ehea_destroy_eq(pr->eq); 1595 1596 for (i = 0; i < pr->rq1_skba.len; i++) 1597 if (pr->rq1_skba.arr[i]) 1598 dev_kfree_skb(pr->rq1_skba.arr[i]); 1599 1600 for (i = 0; i < pr->rq2_skba.len; i++) 1601 if (pr->rq2_skba.arr[i]) 1602 dev_kfree_skb(pr->rq2_skba.arr[i]); 1603 1604 for (i = 0; i < pr->rq3_skba.len; i++) 1605 if (pr->rq3_skba.arr[i]) 1606 dev_kfree_skb(pr->rq3_skba.arr[i]); 1607 1608 for (i = 0; i < pr->sq_skba.len; i++) 1609 if (pr->sq_skba.arr[i]) 1610 dev_kfree_skb(pr->sq_skba.arr[i]); 1611 1612 vfree(pr->rq1_skba.arr); 1613 vfree(pr->rq2_skba.arr); 1614 vfree(pr->rq3_skba.arr); 1615 vfree(pr->sq_skba.arr); 1616 ret = ehea_rem_smrs(pr); 1617 } 1618 return ret; 1619 } 1620 1621 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1622 u32 lkey) 1623 { 1624 int skb_data_size = skb_headlen(skb); 1625 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1626 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1627 unsigned int immediate_len = SWQE2_MAX_IMM; 1628 1629 swqe->descriptors = 0; 1630 1631 if (skb_is_gso(skb)) { 1632 swqe->tx_control |= EHEA_SWQE_TSO; 1633 swqe->mss = skb_shinfo(skb)->gso_size; 1634 /* 1635 * For TSO packets we only copy the headers into the 1636 * immediate area. 1637 */ 1638 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb); 1639 } 1640 1641 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1642 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1643 swqe->immediate_data_length = immediate_len; 1644 1645 if (skb_data_size > immediate_len) { 1646 sg1entry->l_key = lkey; 1647 sg1entry->len = skb_data_size - immediate_len; 1648 sg1entry->vaddr = 1649 ehea_map_vaddr(skb->data + immediate_len); 1650 swqe->descriptors++; 1651 } 1652 } else { 1653 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1654 swqe->immediate_data_length = skb_data_size; 1655 } 1656 } 1657 1658 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1659 struct ehea_swqe *swqe, u32 lkey) 1660 { 1661 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1662 skb_frag_t *frag; 1663 int nfrags, sg1entry_contains_frag_data, i; 1664 1665 nfrags = skb_shinfo(skb)->nr_frags; 1666 sg1entry = &swqe->u.immdata_desc.sg_entry; 1667 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1668 sg1entry_contains_frag_data = 0; 1669 1670 write_swqe2_immediate(skb, swqe, lkey); 1671 1672 /* write descriptors */ 1673 if (nfrags > 0) { 1674 if (swqe->descriptors == 0) { 1675 /* sg1entry not yet used */ 1676 frag = &skb_shinfo(skb)->frags[0]; 1677 1678 /* copy sg1entry data */ 1679 sg1entry->l_key = lkey; 1680 sg1entry->len = skb_frag_size(frag); 1681 sg1entry->vaddr = 1682 ehea_map_vaddr(skb_frag_address(frag)); 1683 swqe->descriptors++; 1684 sg1entry_contains_frag_data = 1; 1685 } 1686 1687 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1688 1689 frag = &skb_shinfo(skb)->frags[i]; 1690 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1691 1692 sgentry->l_key = lkey; 1693 sgentry->len = skb_frag_size(frag); 1694 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1695 swqe->descriptors++; 1696 } 1697 } 1698 } 1699 1700 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1701 { 1702 int ret = 0; 1703 u64 hret; 1704 u8 reg_type; 1705 1706 /* De/Register untagged packets */ 1707 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1708 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1709 port->logical_port_id, 1710 reg_type, port->mac_addr, 0, hcallid); 1711 if (hret != H_SUCCESS) { 1712 pr_err("%sregistering bc address failed (tagged)\n", 1713 hcallid == H_REG_BCMC ? "" : "de"); 1714 ret = -EIO; 1715 goto out_herr; 1716 } 1717 1718 /* De/Register VLAN packets */ 1719 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1720 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1721 port->logical_port_id, 1722 reg_type, port->mac_addr, 0, hcallid); 1723 if (hret != H_SUCCESS) { 1724 pr_err("%sregistering bc address failed (vlan)\n", 1725 hcallid == H_REG_BCMC ? "" : "de"); 1726 ret = -EIO; 1727 } 1728 out_herr: 1729 return ret; 1730 } 1731 1732 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1733 { 1734 struct ehea_port *port = netdev_priv(dev); 1735 struct sockaddr *mac_addr = sa; 1736 struct hcp_ehea_port_cb0 *cb0; 1737 int ret; 1738 u64 hret; 1739 1740 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1741 ret = -EADDRNOTAVAIL; 1742 goto out; 1743 } 1744 1745 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1746 if (!cb0) { 1747 pr_err("no mem for cb0\n"); 1748 ret = -ENOMEM; 1749 goto out; 1750 } 1751 1752 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1753 1754 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1755 1756 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1757 port->logical_port_id, H_PORT_CB0, 1758 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1759 if (hret != H_SUCCESS) { 1760 ret = -EIO; 1761 goto out_free; 1762 } 1763 1764 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); 1765 1766 /* Deregister old MAC in pHYP */ 1767 if (port->state == EHEA_PORT_UP) { 1768 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1769 if (ret) 1770 goto out_upregs; 1771 } 1772 1773 port->mac_addr = cb0->port_mac_addr << 16; 1774 1775 /* Register new MAC in pHYP */ 1776 if (port->state == EHEA_PORT_UP) { 1777 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1778 if (ret) 1779 goto out_upregs; 1780 } 1781 1782 ret = 0; 1783 1784 out_upregs: 1785 ehea_update_bcmc_registrations(); 1786 out_free: 1787 free_page((unsigned long)cb0); 1788 out: 1789 return ret; 1790 } 1791 1792 static void ehea_promiscuous_error(u64 hret, int enable) 1793 { 1794 if (hret == H_AUTHORITY) 1795 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1796 enable == 1 ? "en" : "dis"); 1797 else 1798 pr_err("failed %sabling promiscuous mode\n", 1799 enable == 1 ? "en" : "dis"); 1800 } 1801 1802 static void ehea_promiscuous(struct net_device *dev, int enable) 1803 { 1804 struct ehea_port *port = netdev_priv(dev); 1805 struct hcp_ehea_port_cb7 *cb7; 1806 u64 hret; 1807 1808 if (enable == port->promisc) 1809 return; 1810 1811 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1812 if (!cb7) { 1813 pr_err("no mem for cb7\n"); 1814 goto out; 1815 } 1816 1817 /* Modify Pxs_DUCQPN in CB7 */ 1818 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1819 1820 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1821 port->logical_port_id, 1822 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1823 if (hret) { 1824 ehea_promiscuous_error(hret, enable); 1825 goto out; 1826 } 1827 1828 port->promisc = enable; 1829 out: 1830 free_page((unsigned long)cb7); 1831 } 1832 1833 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1834 u32 hcallid) 1835 { 1836 u64 hret; 1837 u8 reg_type; 1838 1839 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST 1840 | EHEA_BCMC_UNTAGGED; 1841 1842 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1843 port->logical_port_id, 1844 reg_type, mc_mac_addr, 0, hcallid); 1845 if (hret) 1846 goto out; 1847 1848 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST 1849 | EHEA_BCMC_VLANID_ALL; 1850 1851 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1852 port->logical_port_id, 1853 reg_type, mc_mac_addr, 0, hcallid); 1854 out: 1855 return hret; 1856 } 1857 1858 static int ehea_drop_multicast_list(struct net_device *dev) 1859 { 1860 struct ehea_port *port = netdev_priv(dev); 1861 struct ehea_mc_list *mc_entry = port->mc_list; 1862 struct list_head *pos; 1863 struct list_head *temp; 1864 int ret = 0; 1865 u64 hret; 1866 1867 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1868 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1869 1870 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1871 H_DEREG_BCMC); 1872 if (hret) { 1873 pr_err("failed deregistering mcast MAC\n"); 1874 ret = -EIO; 1875 } 1876 1877 list_del(pos); 1878 kfree(mc_entry); 1879 } 1880 return ret; 1881 } 1882 1883 static void ehea_allmulti(struct net_device *dev, int enable) 1884 { 1885 struct ehea_port *port = netdev_priv(dev); 1886 u64 hret; 1887 1888 if (!port->allmulti) { 1889 if (enable) { 1890 /* Enable ALLMULTI */ 1891 ehea_drop_multicast_list(dev); 1892 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1893 if (!hret) 1894 port->allmulti = 1; 1895 else 1896 netdev_err(dev, 1897 "failed enabling IFF_ALLMULTI\n"); 1898 } 1899 } else 1900 if (!enable) { 1901 /* Disable ALLMULTI */ 1902 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1903 if (!hret) 1904 port->allmulti = 0; 1905 else 1906 netdev_err(dev, 1907 "failed disabling IFF_ALLMULTI\n"); 1908 } 1909 } 1910 1911 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1912 { 1913 struct ehea_mc_list *ehea_mcl_entry; 1914 u64 hret; 1915 1916 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1917 if (!ehea_mcl_entry) { 1918 pr_err("no mem for mcl_entry\n"); 1919 return; 1920 } 1921 1922 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1923 1924 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1925 1926 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1927 H_REG_BCMC); 1928 if (!hret) 1929 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1930 else { 1931 pr_err("failed registering mcast MAC\n"); 1932 kfree(ehea_mcl_entry); 1933 } 1934 } 1935 1936 static void ehea_set_multicast_list(struct net_device *dev) 1937 { 1938 struct ehea_port *port = netdev_priv(dev); 1939 struct netdev_hw_addr *ha; 1940 int ret; 1941 1942 if (port->promisc) { 1943 ehea_promiscuous(dev, 1); 1944 return; 1945 } 1946 ehea_promiscuous(dev, 0); 1947 1948 if (dev->flags & IFF_ALLMULTI) { 1949 ehea_allmulti(dev, 1); 1950 goto out; 1951 } 1952 ehea_allmulti(dev, 0); 1953 1954 if (!netdev_mc_empty(dev)) { 1955 ret = ehea_drop_multicast_list(dev); 1956 if (ret) { 1957 /* Dropping the current multicast list failed. 1958 * Enabling ALL_MULTI is the best we can do. 1959 */ 1960 ehea_allmulti(dev, 1); 1961 } 1962 1963 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1964 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1965 port->adapter->max_mc_mac); 1966 goto out; 1967 } 1968 1969 netdev_for_each_mc_addr(ha, dev) 1970 ehea_add_multicast_entry(port, ha->addr); 1971 1972 } 1973 out: 1974 ehea_update_bcmc_registrations(); 1975 } 1976 1977 static int ehea_change_mtu(struct net_device *dev, int new_mtu) 1978 { 1979 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE)) 1980 return -EINVAL; 1981 dev->mtu = new_mtu; 1982 return 0; 1983 } 1984 1985 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1986 { 1987 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1988 1989 if (skb->protocol != htons(ETH_P_IP)) 1990 return; 1991 1992 if (skb->ip_summed == CHECKSUM_PARTIAL) 1993 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 1994 1995 swqe->ip_start = skb_network_offset(skb); 1996 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 1997 1998 switch (ip_hdr(skb)->protocol) { 1999 case IPPROTO_UDP: 2000 if (skb->ip_summed == CHECKSUM_PARTIAL) 2001 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2002 2003 swqe->tcp_offset = swqe->ip_end + 1 + 2004 offsetof(struct udphdr, check); 2005 break; 2006 2007 case IPPROTO_TCP: 2008 if (skb->ip_summed == CHECKSUM_PARTIAL) 2009 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2010 2011 swqe->tcp_offset = swqe->ip_end + 1 + 2012 offsetof(struct tcphdr, check); 2013 break; 2014 } 2015 } 2016 2017 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 2018 struct ehea_swqe *swqe, u32 lkey) 2019 { 2020 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 2021 2022 xmit_common(skb, swqe); 2023 2024 write_swqe2_data(skb, dev, swqe, lkey); 2025 } 2026 2027 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 2028 struct ehea_swqe *swqe) 2029 { 2030 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2031 2032 xmit_common(skb, swqe); 2033 2034 if (!skb->data_len) 2035 skb_copy_from_linear_data(skb, imm_data, skb->len); 2036 else 2037 skb_copy_bits(skb, 0, imm_data, skb->len); 2038 2039 swqe->immediate_data_length = skb->len; 2040 dev_kfree_skb(skb); 2041 } 2042 2043 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2044 { 2045 struct ehea_port *port = netdev_priv(dev); 2046 struct ehea_swqe *swqe; 2047 u32 lkey; 2048 int swqe_index; 2049 struct ehea_port_res *pr; 2050 struct netdev_queue *txq; 2051 2052 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2053 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2054 2055 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2056 memset(swqe, 0, SWQE_HEADER_SIZE); 2057 atomic_dec(&pr->swqe_avail); 2058 2059 if (vlan_tx_tag_present(skb)) { 2060 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2061 swqe->vlan_tag = vlan_tx_tag_get(skb); 2062 } 2063 2064 pr->tx_packets++; 2065 pr->tx_bytes += skb->len; 2066 2067 if (skb->len <= SWQE3_MAX_IMM) { 2068 u32 sig_iv = port->sig_comp_iv; 2069 u32 swqe_num = pr->swqe_id_counter; 2070 ehea_xmit3(skb, dev, swqe); 2071 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2072 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2073 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2074 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2075 sig_iv); 2076 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2077 pr->swqe_ll_count = 0; 2078 } else 2079 pr->swqe_ll_count += 1; 2080 } else { 2081 swqe->wr_id = 2082 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2083 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2084 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2085 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2086 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2087 2088 pr->sq_skba.index++; 2089 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2090 2091 lkey = pr->send_mr.lkey; 2092 ehea_xmit2(skb, dev, swqe, lkey); 2093 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2094 } 2095 pr->swqe_id_counter += 1; 2096 2097 netif_info(port, tx_queued, dev, 2098 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2099 if (netif_msg_tx_queued(port)) 2100 ehea_dump(swqe, 512, "swqe"); 2101 2102 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2103 netif_tx_stop_queue(txq); 2104 swqe->tx_control |= EHEA_SWQE_PURGE; 2105 } 2106 2107 ehea_post_swqe(pr->qp, swqe); 2108 2109 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2110 pr->p_stats.queue_stopped++; 2111 netif_tx_stop_queue(txq); 2112 } 2113 2114 return NETDEV_TX_OK; 2115 } 2116 2117 static int ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid) 2118 { 2119 struct ehea_port *port = netdev_priv(dev); 2120 struct ehea_adapter *adapter = port->adapter; 2121 struct hcp_ehea_port_cb1 *cb1; 2122 int index; 2123 u64 hret; 2124 int err = 0; 2125 2126 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2127 if (!cb1) { 2128 pr_err("no mem for cb1\n"); 2129 err = -ENOMEM; 2130 goto out; 2131 } 2132 2133 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2134 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2135 if (hret != H_SUCCESS) { 2136 pr_err("query_ehea_port failed\n"); 2137 err = -EINVAL; 2138 goto out; 2139 } 2140 2141 index = (vid / 64); 2142 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2143 2144 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2145 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2146 if (hret != H_SUCCESS) { 2147 pr_err("modify_ehea_port failed\n"); 2148 err = -EINVAL; 2149 } 2150 out: 2151 free_page((unsigned long)cb1); 2152 return err; 2153 } 2154 2155 static int ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid) 2156 { 2157 struct ehea_port *port = netdev_priv(dev); 2158 struct ehea_adapter *adapter = port->adapter; 2159 struct hcp_ehea_port_cb1 *cb1; 2160 int index; 2161 u64 hret; 2162 int err = 0; 2163 2164 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2165 if (!cb1) { 2166 pr_err("no mem for cb1\n"); 2167 err = -ENOMEM; 2168 goto out; 2169 } 2170 2171 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2172 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2173 if (hret != H_SUCCESS) { 2174 pr_err("query_ehea_port failed\n"); 2175 err = -EINVAL; 2176 goto out; 2177 } 2178 2179 index = (vid / 64); 2180 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2181 2182 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2183 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2184 if (hret != H_SUCCESS) { 2185 pr_err("modify_ehea_port failed\n"); 2186 err = -EINVAL; 2187 } 2188 out: 2189 free_page((unsigned long)cb1); 2190 return err; 2191 } 2192 2193 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2194 { 2195 int ret = -EIO; 2196 u64 hret; 2197 u16 dummy16 = 0; 2198 u64 dummy64 = 0; 2199 struct hcp_modify_qp_cb0 *cb0; 2200 2201 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2202 if (!cb0) { 2203 ret = -ENOMEM; 2204 goto out; 2205 } 2206 2207 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2208 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2209 if (hret != H_SUCCESS) { 2210 pr_err("query_ehea_qp failed (1)\n"); 2211 goto out; 2212 } 2213 2214 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2215 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2216 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2217 &dummy64, &dummy64, &dummy16, &dummy16); 2218 if (hret != H_SUCCESS) { 2219 pr_err("modify_ehea_qp failed (1)\n"); 2220 goto out; 2221 } 2222 2223 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2224 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2225 if (hret != H_SUCCESS) { 2226 pr_err("query_ehea_qp failed (2)\n"); 2227 goto out; 2228 } 2229 2230 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2231 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2232 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2233 &dummy64, &dummy64, &dummy16, &dummy16); 2234 if (hret != H_SUCCESS) { 2235 pr_err("modify_ehea_qp failed (2)\n"); 2236 goto out; 2237 } 2238 2239 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2240 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2241 if (hret != H_SUCCESS) { 2242 pr_err("query_ehea_qp failed (3)\n"); 2243 goto out; 2244 } 2245 2246 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2247 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2248 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2249 &dummy64, &dummy64, &dummy16, &dummy16); 2250 if (hret != H_SUCCESS) { 2251 pr_err("modify_ehea_qp failed (3)\n"); 2252 goto out; 2253 } 2254 2255 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2256 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2257 if (hret != H_SUCCESS) { 2258 pr_err("query_ehea_qp failed (4)\n"); 2259 goto out; 2260 } 2261 2262 ret = 0; 2263 out: 2264 free_page((unsigned long)cb0); 2265 return ret; 2266 } 2267 2268 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2269 { 2270 int ret, i; 2271 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2272 enum ehea_eq_type eq_type = EHEA_EQ; 2273 2274 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2275 EHEA_MAX_ENTRIES_EQ, 1); 2276 if (!port->qp_eq) { 2277 ret = -EINVAL; 2278 pr_err("ehea_create_eq failed (qp_eq)\n"); 2279 goto out_kill_eq; 2280 } 2281 2282 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2283 pr_cfg.max_entries_scq = sq_entries * 2; 2284 pr_cfg.max_entries_sq = sq_entries; 2285 pr_cfg.max_entries_rq1 = rq1_entries; 2286 pr_cfg.max_entries_rq2 = rq2_entries; 2287 pr_cfg.max_entries_rq3 = rq3_entries; 2288 2289 pr_cfg_small_rx.max_entries_rcq = 1; 2290 pr_cfg_small_rx.max_entries_scq = sq_entries; 2291 pr_cfg_small_rx.max_entries_sq = sq_entries; 2292 pr_cfg_small_rx.max_entries_rq1 = 1; 2293 pr_cfg_small_rx.max_entries_rq2 = 1; 2294 pr_cfg_small_rx.max_entries_rq3 = 1; 2295 2296 for (i = 0; i < def_qps; i++) { 2297 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2298 if (ret) 2299 goto out_clean_pr; 2300 } 2301 for (i = def_qps; i < def_qps; i++) { 2302 ret = ehea_init_port_res(port, &port->port_res[i], 2303 &pr_cfg_small_rx, i); 2304 if (ret) 2305 goto out_clean_pr; 2306 } 2307 2308 return 0; 2309 2310 out_clean_pr: 2311 while (--i >= 0) 2312 ehea_clean_portres(port, &port->port_res[i]); 2313 2314 out_kill_eq: 2315 ehea_destroy_eq(port->qp_eq); 2316 return ret; 2317 } 2318 2319 static int ehea_clean_all_portres(struct ehea_port *port) 2320 { 2321 int ret = 0; 2322 int i; 2323 2324 for (i = 0; i < port->num_def_qps; i++) 2325 ret |= ehea_clean_portres(port, &port->port_res[i]); 2326 2327 ret |= ehea_destroy_eq(port->qp_eq); 2328 2329 return ret; 2330 } 2331 2332 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2333 { 2334 if (adapter->active_ports) 2335 return; 2336 2337 ehea_rem_mr(&adapter->mr); 2338 } 2339 2340 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2341 { 2342 if (adapter->active_ports) 2343 return 0; 2344 2345 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2346 } 2347 2348 static int ehea_up(struct net_device *dev) 2349 { 2350 int ret, i; 2351 struct ehea_port *port = netdev_priv(dev); 2352 2353 if (port->state == EHEA_PORT_UP) 2354 return 0; 2355 2356 ret = ehea_port_res_setup(port, port->num_def_qps); 2357 if (ret) { 2358 netdev_err(dev, "port_res_failed\n"); 2359 goto out; 2360 } 2361 2362 /* Set default QP for this port */ 2363 ret = ehea_configure_port(port); 2364 if (ret) { 2365 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2366 goto out_clean_pr; 2367 } 2368 2369 ret = ehea_reg_interrupts(dev); 2370 if (ret) { 2371 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2372 goto out_clean_pr; 2373 } 2374 2375 for (i = 0; i < port->num_def_qps; i++) { 2376 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2377 if (ret) { 2378 netdev_err(dev, "activate_qp failed\n"); 2379 goto out_free_irqs; 2380 } 2381 } 2382 2383 for (i = 0; i < port->num_def_qps; i++) { 2384 ret = ehea_fill_port_res(&port->port_res[i]); 2385 if (ret) { 2386 netdev_err(dev, "out_free_irqs\n"); 2387 goto out_free_irqs; 2388 } 2389 } 2390 2391 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2392 if (ret) { 2393 ret = -EIO; 2394 goto out_free_irqs; 2395 } 2396 2397 port->state = EHEA_PORT_UP; 2398 2399 ret = 0; 2400 goto out; 2401 2402 out_free_irqs: 2403 ehea_free_interrupts(dev); 2404 2405 out_clean_pr: 2406 ehea_clean_all_portres(port); 2407 out: 2408 if (ret) 2409 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2410 2411 ehea_update_bcmc_registrations(); 2412 ehea_update_firmware_handles(); 2413 2414 return ret; 2415 } 2416 2417 static void port_napi_disable(struct ehea_port *port) 2418 { 2419 int i; 2420 2421 for (i = 0; i < port->num_def_qps; i++) 2422 napi_disable(&port->port_res[i].napi); 2423 } 2424 2425 static void port_napi_enable(struct ehea_port *port) 2426 { 2427 int i; 2428 2429 for (i = 0; i < port->num_def_qps; i++) 2430 napi_enable(&port->port_res[i].napi); 2431 } 2432 2433 static int ehea_open(struct net_device *dev) 2434 { 2435 int ret; 2436 struct ehea_port *port = netdev_priv(dev); 2437 2438 mutex_lock(&port->port_lock); 2439 2440 netif_info(port, ifup, dev, "enabling port\n"); 2441 2442 ret = ehea_up(dev); 2443 if (!ret) { 2444 port_napi_enable(port); 2445 netif_tx_start_all_queues(dev); 2446 } 2447 2448 mutex_unlock(&port->port_lock); 2449 schedule_delayed_work(&port->stats_work, 2450 round_jiffies_relative(msecs_to_jiffies(1000))); 2451 2452 return ret; 2453 } 2454 2455 static int ehea_down(struct net_device *dev) 2456 { 2457 int ret; 2458 struct ehea_port *port = netdev_priv(dev); 2459 2460 if (port->state == EHEA_PORT_DOWN) 2461 return 0; 2462 2463 ehea_drop_multicast_list(dev); 2464 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2465 2466 ehea_free_interrupts(dev); 2467 2468 port->state = EHEA_PORT_DOWN; 2469 2470 ehea_update_bcmc_registrations(); 2471 2472 ret = ehea_clean_all_portres(port); 2473 if (ret) 2474 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2475 2476 ehea_update_firmware_handles(); 2477 2478 return ret; 2479 } 2480 2481 static int ehea_stop(struct net_device *dev) 2482 { 2483 int ret; 2484 struct ehea_port *port = netdev_priv(dev); 2485 2486 netif_info(port, ifdown, dev, "disabling port\n"); 2487 2488 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2489 cancel_work_sync(&port->reset_task); 2490 cancel_delayed_work_sync(&port->stats_work); 2491 mutex_lock(&port->port_lock); 2492 netif_tx_stop_all_queues(dev); 2493 port_napi_disable(port); 2494 ret = ehea_down(dev); 2495 mutex_unlock(&port->port_lock); 2496 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2497 return ret; 2498 } 2499 2500 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2501 { 2502 struct ehea_qp qp = *orig_qp; 2503 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2504 struct ehea_swqe *swqe; 2505 int wqe_index; 2506 int i; 2507 2508 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2509 swqe = ehea_get_swqe(&qp, &wqe_index); 2510 swqe->tx_control |= EHEA_SWQE_PURGE; 2511 } 2512 } 2513 2514 static void ehea_flush_sq(struct ehea_port *port) 2515 { 2516 int i; 2517 2518 for (i = 0; i < port->num_def_qps; i++) { 2519 struct ehea_port_res *pr = &port->port_res[i]; 2520 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2521 int ret; 2522 2523 ret = wait_event_timeout(port->swqe_avail_wq, 2524 atomic_read(&pr->swqe_avail) >= swqe_max, 2525 msecs_to_jiffies(100)); 2526 2527 if (!ret) { 2528 pr_err("WARNING: sq not flushed completely\n"); 2529 break; 2530 } 2531 } 2532 } 2533 2534 static int ehea_stop_qps(struct net_device *dev) 2535 { 2536 struct ehea_port *port = netdev_priv(dev); 2537 struct ehea_adapter *adapter = port->adapter; 2538 struct hcp_modify_qp_cb0 *cb0; 2539 int ret = -EIO; 2540 int dret; 2541 int i; 2542 u64 hret; 2543 u64 dummy64 = 0; 2544 u16 dummy16 = 0; 2545 2546 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2547 if (!cb0) { 2548 ret = -ENOMEM; 2549 goto out; 2550 } 2551 2552 for (i = 0; i < (port->num_def_qps); i++) { 2553 struct ehea_port_res *pr = &port->port_res[i]; 2554 struct ehea_qp *qp = pr->qp; 2555 2556 /* Purge send queue */ 2557 ehea_purge_sq(qp); 2558 2559 /* Disable queue pair */ 2560 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2561 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2562 cb0); 2563 if (hret != H_SUCCESS) { 2564 pr_err("query_ehea_qp failed (1)\n"); 2565 goto out; 2566 } 2567 2568 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2569 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2570 2571 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2572 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2573 1), cb0, &dummy64, 2574 &dummy64, &dummy16, &dummy16); 2575 if (hret != H_SUCCESS) { 2576 pr_err("modify_ehea_qp failed (1)\n"); 2577 goto out; 2578 } 2579 2580 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2581 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2582 cb0); 2583 if (hret != H_SUCCESS) { 2584 pr_err("query_ehea_qp failed (2)\n"); 2585 goto out; 2586 } 2587 2588 /* deregister shared memory regions */ 2589 dret = ehea_rem_smrs(pr); 2590 if (dret) { 2591 pr_err("unreg shared memory region failed\n"); 2592 goto out; 2593 } 2594 } 2595 2596 ret = 0; 2597 out: 2598 free_page((unsigned long)cb0); 2599 2600 return ret; 2601 } 2602 2603 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2604 { 2605 struct ehea_qp qp = *orig_qp; 2606 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2607 struct ehea_rwqe *rwqe; 2608 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2609 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2610 struct sk_buff *skb; 2611 u32 lkey = pr->recv_mr.lkey; 2612 2613 2614 int i; 2615 int index; 2616 2617 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2618 rwqe = ehea_get_next_rwqe(&qp, 2); 2619 rwqe->sg_list[0].l_key = lkey; 2620 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2621 skb = skba_rq2[index]; 2622 if (skb) 2623 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2624 } 2625 2626 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2627 rwqe = ehea_get_next_rwqe(&qp, 3); 2628 rwqe->sg_list[0].l_key = lkey; 2629 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2630 skb = skba_rq3[index]; 2631 if (skb) 2632 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2633 } 2634 } 2635 2636 static int ehea_restart_qps(struct net_device *dev) 2637 { 2638 struct ehea_port *port = netdev_priv(dev); 2639 struct ehea_adapter *adapter = port->adapter; 2640 int ret = 0; 2641 int i; 2642 2643 struct hcp_modify_qp_cb0 *cb0; 2644 u64 hret; 2645 u64 dummy64 = 0; 2646 u16 dummy16 = 0; 2647 2648 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2649 if (!cb0) { 2650 ret = -ENOMEM; 2651 goto out; 2652 } 2653 2654 for (i = 0; i < (port->num_def_qps); i++) { 2655 struct ehea_port_res *pr = &port->port_res[i]; 2656 struct ehea_qp *qp = pr->qp; 2657 2658 ret = ehea_gen_smrs(pr); 2659 if (ret) { 2660 netdev_err(dev, "creation of shared memory regions failed\n"); 2661 goto out; 2662 } 2663 2664 ehea_update_rqs(qp, pr); 2665 2666 /* Enable queue pair */ 2667 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2668 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2669 cb0); 2670 if (hret != H_SUCCESS) { 2671 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2672 goto out; 2673 } 2674 2675 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2676 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2677 2678 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2679 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2680 1), cb0, &dummy64, 2681 &dummy64, &dummy16, &dummy16); 2682 if (hret != H_SUCCESS) { 2683 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2684 goto out; 2685 } 2686 2687 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2688 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2689 cb0); 2690 if (hret != H_SUCCESS) { 2691 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2692 goto out; 2693 } 2694 2695 /* refill entire queue */ 2696 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2697 ehea_refill_rq2(pr, 0); 2698 ehea_refill_rq3(pr, 0); 2699 } 2700 out: 2701 free_page((unsigned long)cb0); 2702 2703 return ret; 2704 } 2705 2706 static void ehea_reset_port(struct work_struct *work) 2707 { 2708 int ret; 2709 struct ehea_port *port = 2710 container_of(work, struct ehea_port, reset_task); 2711 struct net_device *dev = port->netdev; 2712 2713 mutex_lock(&dlpar_mem_lock); 2714 port->resets++; 2715 mutex_lock(&port->port_lock); 2716 netif_tx_disable(dev); 2717 2718 port_napi_disable(port); 2719 2720 ehea_down(dev); 2721 2722 ret = ehea_up(dev); 2723 if (ret) 2724 goto out; 2725 2726 ehea_set_multicast_list(dev); 2727 2728 netif_info(port, timer, dev, "reset successful\n"); 2729 2730 port_napi_enable(port); 2731 2732 netif_tx_wake_all_queues(dev); 2733 out: 2734 mutex_unlock(&port->port_lock); 2735 mutex_unlock(&dlpar_mem_lock); 2736 } 2737 2738 static void ehea_rereg_mrs(void) 2739 { 2740 int ret, i; 2741 struct ehea_adapter *adapter; 2742 2743 pr_info("LPAR memory changed - re-initializing driver\n"); 2744 2745 list_for_each_entry(adapter, &adapter_list, list) 2746 if (adapter->active_ports) { 2747 /* Shutdown all ports */ 2748 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2749 struct ehea_port *port = adapter->port[i]; 2750 struct net_device *dev; 2751 2752 if (!port) 2753 continue; 2754 2755 dev = port->netdev; 2756 2757 if (dev->flags & IFF_UP) { 2758 mutex_lock(&port->port_lock); 2759 netif_tx_disable(dev); 2760 ehea_flush_sq(port); 2761 ret = ehea_stop_qps(dev); 2762 if (ret) { 2763 mutex_unlock(&port->port_lock); 2764 goto out; 2765 } 2766 port_napi_disable(port); 2767 mutex_unlock(&port->port_lock); 2768 } 2769 reset_sq_restart_flag(port); 2770 } 2771 2772 /* Unregister old memory region */ 2773 ret = ehea_rem_mr(&adapter->mr); 2774 if (ret) { 2775 pr_err("unregister MR failed - driver inoperable!\n"); 2776 goto out; 2777 } 2778 } 2779 2780 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2781 2782 list_for_each_entry(adapter, &adapter_list, list) 2783 if (adapter->active_ports) { 2784 /* Register new memory region */ 2785 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2786 if (ret) { 2787 pr_err("register MR failed - driver inoperable!\n"); 2788 goto out; 2789 } 2790 2791 /* Restart all ports */ 2792 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2793 struct ehea_port *port = adapter->port[i]; 2794 2795 if (port) { 2796 struct net_device *dev = port->netdev; 2797 2798 if (dev->flags & IFF_UP) { 2799 mutex_lock(&port->port_lock); 2800 ret = ehea_restart_qps(dev); 2801 if (!ret) { 2802 check_sqs(port); 2803 port_napi_enable(port); 2804 netif_tx_wake_all_queues(dev); 2805 } else { 2806 netdev_err(dev, "Unable to restart QPS\n"); 2807 } 2808 mutex_unlock(&port->port_lock); 2809 } 2810 } 2811 } 2812 } 2813 pr_info("re-initializing driver complete\n"); 2814 out: 2815 return; 2816 } 2817 2818 static void ehea_tx_watchdog(struct net_device *dev) 2819 { 2820 struct ehea_port *port = netdev_priv(dev); 2821 2822 if (netif_carrier_ok(dev) && 2823 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2824 ehea_schedule_port_reset(port); 2825 } 2826 2827 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2828 { 2829 struct hcp_query_ehea *cb; 2830 u64 hret; 2831 int ret; 2832 2833 cb = (void *)get_zeroed_page(GFP_KERNEL); 2834 if (!cb) { 2835 ret = -ENOMEM; 2836 goto out; 2837 } 2838 2839 hret = ehea_h_query_ehea(adapter->handle, cb); 2840 2841 if (hret != H_SUCCESS) { 2842 ret = -EIO; 2843 goto out_herr; 2844 } 2845 2846 adapter->max_mc_mac = cb->max_mc_mac - 1; 2847 ret = 0; 2848 2849 out_herr: 2850 free_page((unsigned long)cb); 2851 out: 2852 return ret; 2853 } 2854 2855 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2856 { 2857 struct hcp_ehea_port_cb4 *cb4; 2858 u64 hret; 2859 int ret = 0; 2860 2861 *jumbo = 0; 2862 2863 /* (Try to) enable *jumbo frames */ 2864 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2865 if (!cb4) { 2866 pr_err("no mem for cb4\n"); 2867 ret = -ENOMEM; 2868 goto out; 2869 } else { 2870 hret = ehea_h_query_ehea_port(port->adapter->handle, 2871 port->logical_port_id, 2872 H_PORT_CB4, 2873 H_PORT_CB4_JUMBO, cb4); 2874 if (hret == H_SUCCESS) { 2875 if (cb4->jumbo_frame) 2876 *jumbo = 1; 2877 else { 2878 cb4->jumbo_frame = 1; 2879 hret = ehea_h_modify_ehea_port(port->adapter-> 2880 handle, 2881 port-> 2882 logical_port_id, 2883 H_PORT_CB4, 2884 H_PORT_CB4_JUMBO, 2885 cb4); 2886 if (hret == H_SUCCESS) 2887 *jumbo = 1; 2888 } 2889 } else 2890 ret = -EINVAL; 2891 2892 free_page((unsigned long)cb4); 2893 } 2894 out: 2895 return ret; 2896 } 2897 2898 static ssize_t ehea_show_port_id(struct device *dev, 2899 struct device_attribute *attr, char *buf) 2900 { 2901 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2902 return sprintf(buf, "%d", port->logical_port_id); 2903 } 2904 2905 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id, 2906 NULL); 2907 2908 static void __devinit logical_port_release(struct device *dev) 2909 { 2910 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2911 of_node_put(port->ofdev.dev.of_node); 2912 } 2913 2914 static struct device *ehea_register_port(struct ehea_port *port, 2915 struct device_node *dn) 2916 { 2917 int ret; 2918 2919 port->ofdev.dev.of_node = of_node_get(dn); 2920 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2921 port->ofdev.dev.bus = &ibmebus_bus_type; 2922 2923 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2924 port->ofdev.dev.release = logical_port_release; 2925 2926 ret = of_device_register(&port->ofdev); 2927 if (ret) { 2928 pr_err("failed to register device. ret=%d\n", ret); 2929 goto out; 2930 } 2931 2932 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2933 if (ret) { 2934 pr_err("failed to register attributes, ret=%d\n", ret); 2935 goto out_unreg_of_dev; 2936 } 2937 2938 return &port->ofdev.dev; 2939 2940 out_unreg_of_dev: 2941 of_device_unregister(&port->ofdev); 2942 out: 2943 return NULL; 2944 } 2945 2946 static void ehea_unregister_port(struct ehea_port *port) 2947 { 2948 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2949 of_device_unregister(&port->ofdev); 2950 } 2951 2952 static const struct net_device_ops ehea_netdev_ops = { 2953 .ndo_open = ehea_open, 2954 .ndo_stop = ehea_stop, 2955 .ndo_start_xmit = ehea_start_xmit, 2956 #ifdef CONFIG_NET_POLL_CONTROLLER 2957 .ndo_poll_controller = ehea_netpoll, 2958 #endif 2959 .ndo_get_stats64 = ehea_get_stats64, 2960 .ndo_set_mac_address = ehea_set_mac_addr, 2961 .ndo_validate_addr = eth_validate_addr, 2962 .ndo_set_rx_mode = ehea_set_multicast_list, 2963 .ndo_change_mtu = ehea_change_mtu, 2964 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2965 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2966 .ndo_tx_timeout = ehea_tx_watchdog, 2967 }; 2968 2969 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2970 u32 logical_port_id, 2971 struct device_node *dn) 2972 { 2973 int ret; 2974 struct net_device *dev; 2975 struct ehea_port *port; 2976 struct device *port_dev; 2977 int jumbo; 2978 2979 /* allocate memory for the port structures */ 2980 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2981 2982 if (!dev) { 2983 pr_err("no mem for net_device\n"); 2984 ret = -ENOMEM; 2985 goto out_err; 2986 } 2987 2988 port = netdev_priv(dev); 2989 2990 mutex_init(&port->port_lock); 2991 port->state = EHEA_PORT_DOWN; 2992 port->sig_comp_iv = sq_entries / 10; 2993 2994 port->adapter = adapter; 2995 port->netdev = dev; 2996 port->logical_port_id = logical_port_id; 2997 2998 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 2999 3000 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 3001 if (!port->mc_list) { 3002 ret = -ENOMEM; 3003 goto out_free_ethdev; 3004 } 3005 3006 INIT_LIST_HEAD(&port->mc_list->list); 3007 3008 ret = ehea_sense_port_attr(port); 3009 if (ret) 3010 goto out_free_mc_list; 3011 3012 netif_set_real_num_rx_queues(dev, port->num_def_qps); 3013 netif_set_real_num_tx_queues(dev, port->num_def_qps); 3014 3015 port_dev = ehea_register_port(port, dn); 3016 if (!port_dev) 3017 goto out_free_mc_list; 3018 3019 SET_NETDEV_DEV(dev, port_dev); 3020 3021 /* initialize net_device structure */ 3022 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); 3023 3024 dev->netdev_ops = &ehea_netdev_ops; 3025 ehea_set_ethtool_ops(dev); 3026 3027 dev->hw_features = NETIF_F_SG | NETIF_F_TSO 3028 | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO; 3029 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO 3030 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX 3031 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER 3032 | NETIF_F_RXCSUM; 3033 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3034 NETIF_F_IP_CSUM; 3035 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3036 3037 INIT_WORK(&port->reset_task, ehea_reset_port); 3038 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3039 3040 init_waitqueue_head(&port->swqe_avail_wq); 3041 init_waitqueue_head(&port->restart_wq); 3042 3043 memset(&port->stats, 0, sizeof(struct net_device_stats)); 3044 ret = register_netdev(dev); 3045 if (ret) { 3046 pr_err("register_netdev failed. ret=%d\n", ret); 3047 goto out_unreg_port; 3048 } 3049 3050 ret = ehea_get_jumboframe_status(port, &jumbo); 3051 if (ret) 3052 netdev_err(dev, "failed determining jumbo frame status\n"); 3053 3054 netdev_info(dev, "Jumbo frames are %sabled\n", 3055 jumbo == 1 ? "en" : "dis"); 3056 3057 adapter->active_ports++; 3058 3059 return port; 3060 3061 out_unreg_port: 3062 ehea_unregister_port(port); 3063 3064 out_free_mc_list: 3065 kfree(port->mc_list); 3066 3067 out_free_ethdev: 3068 free_netdev(dev); 3069 3070 out_err: 3071 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3072 logical_port_id, ret); 3073 return NULL; 3074 } 3075 3076 static void ehea_shutdown_single_port(struct ehea_port *port) 3077 { 3078 struct ehea_adapter *adapter = port->adapter; 3079 3080 cancel_work_sync(&port->reset_task); 3081 cancel_delayed_work_sync(&port->stats_work); 3082 unregister_netdev(port->netdev); 3083 ehea_unregister_port(port); 3084 kfree(port->mc_list); 3085 free_netdev(port->netdev); 3086 adapter->active_ports--; 3087 } 3088 3089 static int ehea_setup_ports(struct ehea_adapter *adapter) 3090 { 3091 struct device_node *lhea_dn; 3092 struct device_node *eth_dn = NULL; 3093 3094 const u32 *dn_log_port_id; 3095 int i = 0; 3096 3097 lhea_dn = adapter->ofdev->dev.of_node; 3098 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3099 3100 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3101 NULL); 3102 if (!dn_log_port_id) { 3103 pr_err("bad device node: eth_dn name=%s\n", 3104 eth_dn->full_name); 3105 continue; 3106 } 3107 3108 if (ehea_add_adapter_mr(adapter)) { 3109 pr_err("creating MR failed\n"); 3110 of_node_put(eth_dn); 3111 return -EIO; 3112 } 3113 3114 adapter->port[i] = ehea_setup_single_port(adapter, 3115 *dn_log_port_id, 3116 eth_dn); 3117 if (adapter->port[i]) 3118 netdev_info(adapter->port[i]->netdev, 3119 "logical port id #%d\n", *dn_log_port_id); 3120 else 3121 ehea_remove_adapter_mr(adapter); 3122 3123 i++; 3124 } 3125 return 0; 3126 } 3127 3128 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3129 u32 logical_port_id) 3130 { 3131 struct device_node *lhea_dn; 3132 struct device_node *eth_dn = NULL; 3133 const u32 *dn_log_port_id; 3134 3135 lhea_dn = adapter->ofdev->dev.of_node; 3136 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3137 3138 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3139 NULL); 3140 if (dn_log_port_id) 3141 if (*dn_log_port_id == logical_port_id) 3142 return eth_dn; 3143 } 3144 3145 return NULL; 3146 } 3147 3148 static ssize_t ehea_probe_port(struct device *dev, 3149 struct device_attribute *attr, 3150 const char *buf, size_t count) 3151 { 3152 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3153 struct ehea_port *port; 3154 struct device_node *eth_dn = NULL; 3155 int i; 3156 3157 u32 logical_port_id; 3158 3159 sscanf(buf, "%d", &logical_port_id); 3160 3161 port = ehea_get_port(adapter, logical_port_id); 3162 3163 if (port) { 3164 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3165 logical_port_id); 3166 return -EINVAL; 3167 } 3168 3169 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3170 3171 if (!eth_dn) { 3172 pr_info("no logical port with id %d found\n", logical_port_id); 3173 return -EINVAL; 3174 } 3175 3176 if (ehea_add_adapter_mr(adapter)) { 3177 pr_err("creating MR failed\n"); 3178 return -EIO; 3179 } 3180 3181 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3182 3183 of_node_put(eth_dn); 3184 3185 if (port) { 3186 for (i = 0; i < EHEA_MAX_PORTS; i++) 3187 if (!adapter->port[i]) { 3188 adapter->port[i] = port; 3189 break; 3190 } 3191 3192 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3193 logical_port_id); 3194 } else { 3195 ehea_remove_adapter_mr(adapter); 3196 return -EIO; 3197 } 3198 3199 return (ssize_t) count; 3200 } 3201 3202 static ssize_t ehea_remove_port(struct device *dev, 3203 struct device_attribute *attr, 3204 const char *buf, size_t count) 3205 { 3206 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3207 struct ehea_port *port; 3208 int i; 3209 u32 logical_port_id; 3210 3211 sscanf(buf, "%d", &logical_port_id); 3212 3213 port = ehea_get_port(adapter, logical_port_id); 3214 3215 if (port) { 3216 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3217 logical_port_id); 3218 3219 ehea_shutdown_single_port(port); 3220 3221 for (i = 0; i < EHEA_MAX_PORTS; i++) 3222 if (adapter->port[i] == port) { 3223 adapter->port[i] = NULL; 3224 break; 3225 } 3226 } else { 3227 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3228 logical_port_id); 3229 return -EINVAL; 3230 } 3231 3232 ehea_remove_adapter_mr(adapter); 3233 3234 return (ssize_t) count; 3235 } 3236 3237 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port); 3238 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port); 3239 3240 static int ehea_create_device_sysfs(struct platform_device *dev) 3241 { 3242 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3243 if (ret) 3244 goto out; 3245 3246 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3247 out: 3248 return ret; 3249 } 3250 3251 static void ehea_remove_device_sysfs(struct platform_device *dev) 3252 { 3253 device_remove_file(&dev->dev, &dev_attr_probe_port); 3254 device_remove_file(&dev->dev, &dev_attr_remove_port); 3255 } 3256 3257 static int __devinit ehea_probe_adapter(struct platform_device *dev, 3258 const struct of_device_id *id) 3259 { 3260 struct ehea_adapter *adapter; 3261 const u64 *adapter_handle; 3262 int ret; 3263 3264 if (!dev || !dev->dev.of_node) { 3265 pr_err("Invalid ibmebus device probed\n"); 3266 return -EINVAL; 3267 } 3268 3269 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); 3270 if (!adapter) { 3271 ret = -ENOMEM; 3272 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3273 goto out; 3274 } 3275 3276 list_add(&adapter->list, &adapter_list); 3277 3278 adapter->ofdev = dev; 3279 3280 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3281 NULL); 3282 if (adapter_handle) 3283 adapter->handle = *adapter_handle; 3284 3285 if (!adapter->handle) { 3286 dev_err(&dev->dev, "failed getting handle for adapter" 3287 " '%s'\n", dev->dev.of_node->full_name); 3288 ret = -ENODEV; 3289 goto out_free_ad; 3290 } 3291 3292 adapter->pd = EHEA_PD_ID; 3293 3294 dev_set_drvdata(&dev->dev, adapter); 3295 3296 3297 /* initialize adapter and ports */ 3298 /* get adapter properties */ 3299 ret = ehea_sense_adapter_attr(adapter); 3300 if (ret) { 3301 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3302 goto out_free_ad; 3303 } 3304 3305 adapter->neq = ehea_create_eq(adapter, 3306 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3307 if (!adapter->neq) { 3308 ret = -EIO; 3309 dev_err(&dev->dev, "NEQ creation failed\n"); 3310 goto out_free_ad; 3311 } 3312 3313 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, 3314 (unsigned long)adapter); 3315 3316 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3317 ehea_interrupt_neq, IRQF_DISABLED, 3318 "ehea_neq", adapter); 3319 if (ret) { 3320 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3321 goto out_kill_eq; 3322 } 3323 3324 ret = ehea_create_device_sysfs(dev); 3325 if (ret) 3326 goto out_free_irq; 3327 3328 ret = ehea_setup_ports(adapter); 3329 if (ret) { 3330 dev_err(&dev->dev, "setup_ports failed\n"); 3331 goto out_rem_dev_sysfs; 3332 } 3333 3334 ret = 0; 3335 goto out; 3336 3337 out_rem_dev_sysfs: 3338 ehea_remove_device_sysfs(dev); 3339 3340 out_free_irq: 3341 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3342 3343 out_kill_eq: 3344 ehea_destroy_eq(adapter->neq); 3345 3346 out_free_ad: 3347 list_del(&adapter->list); 3348 kfree(adapter); 3349 3350 out: 3351 ehea_update_firmware_handles(); 3352 3353 return ret; 3354 } 3355 3356 static int __devexit ehea_remove(struct platform_device *dev) 3357 { 3358 struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev); 3359 int i; 3360 3361 for (i = 0; i < EHEA_MAX_PORTS; i++) 3362 if (adapter->port[i]) { 3363 ehea_shutdown_single_port(adapter->port[i]); 3364 adapter->port[i] = NULL; 3365 } 3366 3367 ehea_remove_device_sysfs(dev); 3368 3369 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3370 tasklet_kill(&adapter->neq_tasklet); 3371 3372 ehea_destroy_eq(adapter->neq); 3373 ehea_remove_adapter_mr(adapter); 3374 list_del(&adapter->list); 3375 kfree(adapter); 3376 3377 ehea_update_firmware_handles(); 3378 3379 return 0; 3380 } 3381 3382 static void ehea_crash_handler(void) 3383 { 3384 int i; 3385 3386 if (ehea_fw_handles.arr) 3387 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3388 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3389 ehea_fw_handles.arr[i].fwh, 3390 FORCE_FREE); 3391 3392 if (ehea_bcmc_regs.arr) 3393 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3394 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3395 ehea_bcmc_regs.arr[i].port_id, 3396 ehea_bcmc_regs.arr[i].reg_type, 3397 ehea_bcmc_regs.arr[i].macaddr, 3398 0, H_DEREG_BCMC); 3399 } 3400 3401 static int ehea_mem_notifier(struct notifier_block *nb, 3402 unsigned long action, void *data) 3403 { 3404 int ret = NOTIFY_BAD; 3405 struct memory_notify *arg = data; 3406 3407 mutex_lock(&dlpar_mem_lock); 3408 3409 switch (action) { 3410 case MEM_CANCEL_OFFLINE: 3411 pr_info("memory offlining canceled"); 3412 /* Readd canceled memory block */ 3413 case MEM_ONLINE: 3414 pr_info("memory is going online"); 3415 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3416 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3417 goto out_unlock; 3418 ehea_rereg_mrs(); 3419 break; 3420 case MEM_GOING_OFFLINE: 3421 pr_info("memory is going offline"); 3422 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3423 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3424 goto out_unlock; 3425 ehea_rereg_mrs(); 3426 break; 3427 default: 3428 break; 3429 } 3430 3431 ehea_update_firmware_handles(); 3432 ret = NOTIFY_OK; 3433 3434 out_unlock: 3435 mutex_unlock(&dlpar_mem_lock); 3436 return ret; 3437 } 3438 3439 static struct notifier_block ehea_mem_nb = { 3440 .notifier_call = ehea_mem_notifier, 3441 }; 3442 3443 static int ehea_reboot_notifier(struct notifier_block *nb, 3444 unsigned long action, void *unused) 3445 { 3446 if (action == SYS_RESTART) { 3447 pr_info("Reboot: freeing all eHEA resources\n"); 3448 ibmebus_unregister_driver(&ehea_driver); 3449 } 3450 return NOTIFY_DONE; 3451 } 3452 3453 static struct notifier_block ehea_reboot_nb = { 3454 .notifier_call = ehea_reboot_notifier, 3455 }; 3456 3457 static int check_module_parm(void) 3458 { 3459 int ret = 0; 3460 3461 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3462 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3463 pr_info("Bad parameter: rq1_entries\n"); 3464 ret = -EINVAL; 3465 } 3466 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3467 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3468 pr_info("Bad parameter: rq2_entries\n"); 3469 ret = -EINVAL; 3470 } 3471 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3472 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3473 pr_info("Bad parameter: rq3_entries\n"); 3474 ret = -EINVAL; 3475 } 3476 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3477 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3478 pr_info("Bad parameter: sq_entries\n"); 3479 ret = -EINVAL; 3480 } 3481 3482 return ret; 3483 } 3484 3485 static ssize_t ehea_show_capabilities(struct device_driver *drv, 3486 char *buf) 3487 { 3488 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3489 } 3490 3491 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH, 3492 ehea_show_capabilities, NULL); 3493 3494 static int __init ehea_module_init(void) 3495 { 3496 int ret; 3497 3498 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3499 3500 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3501 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3502 3503 mutex_init(&ehea_fw_handles.lock); 3504 spin_lock_init(&ehea_bcmc_regs.lock); 3505 3506 ret = check_module_parm(); 3507 if (ret) 3508 goto out; 3509 3510 ret = ehea_create_busmap(); 3511 if (ret) 3512 goto out; 3513 3514 ret = register_reboot_notifier(&ehea_reboot_nb); 3515 if (ret) 3516 pr_info("failed registering reboot notifier\n"); 3517 3518 ret = register_memory_notifier(&ehea_mem_nb); 3519 if (ret) 3520 pr_info("failed registering memory remove notifier\n"); 3521 3522 ret = crash_shutdown_register(ehea_crash_handler); 3523 if (ret) 3524 pr_info("failed registering crash handler\n"); 3525 3526 ret = ibmebus_register_driver(&ehea_driver); 3527 if (ret) { 3528 pr_err("failed registering eHEA device driver on ebus\n"); 3529 goto out2; 3530 } 3531 3532 ret = driver_create_file(&ehea_driver.driver, 3533 &driver_attr_capabilities); 3534 if (ret) { 3535 pr_err("failed to register capabilities attribute, ret=%d\n", 3536 ret); 3537 goto out3; 3538 } 3539 3540 return ret; 3541 3542 out3: 3543 ibmebus_unregister_driver(&ehea_driver); 3544 out2: 3545 unregister_memory_notifier(&ehea_mem_nb); 3546 unregister_reboot_notifier(&ehea_reboot_nb); 3547 crash_shutdown_unregister(ehea_crash_handler); 3548 out: 3549 return ret; 3550 } 3551 3552 static void __exit ehea_module_exit(void) 3553 { 3554 int ret; 3555 3556 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3557 ibmebus_unregister_driver(&ehea_driver); 3558 unregister_reboot_notifier(&ehea_reboot_nb); 3559 ret = crash_shutdown_unregister(ehea_crash_handler); 3560 if (ret) 3561 pr_info("failed unregistering crash handler\n"); 3562 unregister_memory_notifier(&ehea_mem_nb); 3563 kfree(ehea_fw_handles.arr); 3564 kfree(ehea_bcmc_regs.arr); 3565 ehea_destroy_busmap(); 3566 } 3567 3568 module_init(ehea_module_init); 3569 module_exit(ehea_module_exit); 3570