1 /* 2 * linux/drivers/net/ethernet/ibm/ehea/ehea_main.c 3 * 4 * eHEA ethernet device driver for IBM eServer System p 5 * 6 * (C) Copyright IBM Corp. 2006 7 * 8 * Authors: 9 * Christoph Raisch <raisch@de.ibm.com> 10 * Jan-Bernd Themann <themann@de.ibm.com> 11 * Thomas Klein <tklein@de.ibm.com> 12 * 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2, or (at your option) 17 * any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 27 */ 28 29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 30 31 #include <linux/in.h> 32 #include <linux/ip.h> 33 #include <linux/tcp.h> 34 #include <linux/udp.h> 35 #include <linux/if.h> 36 #include <linux/list.h> 37 #include <linux/slab.h> 38 #include <linux/if_ether.h> 39 #include <linux/notifier.h> 40 #include <linux/reboot.h> 41 #include <linux/memory.h> 42 #include <asm/kexec.h> 43 #include <linux/mutex.h> 44 #include <linux/prefetch.h> 45 46 #include <net/ip.h> 47 48 #include "ehea.h" 49 #include "ehea_qmr.h" 50 #include "ehea_phyp.h" 51 52 53 MODULE_LICENSE("GPL"); 54 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>"); 55 MODULE_DESCRIPTION("IBM eServer HEA Driver"); 56 MODULE_VERSION(DRV_VERSION); 57 58 59 static int msg_level = -1; 60 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1; 61 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2; 62 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3; 63 static int sq_entries = EHEA_DEF_ENTRIES_SQ; 64 static int use_mcs = 1; 65 static int prop_carrier_state; 66 67 module_param(msg_level, int, 0); 68 module_param(rq1_entries, int, 0); 69 module_param(rq2_entries, int, 0); 70 module_param(rq3_entries, int, 0); 71 module_param(sq_entries, int, 0); 72 module_param(prop_carrier_state, int, 0); 73 module_param(use_mcs, int, 0); 74 75 MODULE_PARM_DESC(msg_level, "msg_level"); 76 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical " 77 "port to stack. 1:yes, 0:no. Default = 0 "); 78 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 " 79 "[2^x - 1], x = [6..14]. Default = " 80 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")"); 81 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 " 82 "[2^x - 1], x = [6..14]. Default = " 83 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")"); 84 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 " 85 "[2^x - 1], x = [6..14]. Default = " 86 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")"); 87 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue " 88 "[2^x - 1], x = [6..14]. Default = " 89 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); 90 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, " 91 "Default = 1"); 92 93 static int port_name_cnt; 94 static LIST_HEAD(adapter_list); 95 static unsigned long ehea_driver_flags; 96 static DEFINE_MUTEX(dlpar_mem_lock); 97 static struct ehea_fw_handle_array ehea_fw_handles; 98 static struct ehea_bcmc_reg_array ehea_bcmc_regs; 99 100 101 static int __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 stats->multicast = port->stats.multicast; 340 stats->rx_errors = port->stats.rx_errors; 341 return stats; 342 } 343 344 static void ehea_update_stats(struct work_struct *work) 345 { 346 struct ehea_port *port = 347 container_of(work, struct ehea_port, stats_work.work); 348 struct net_device *dev = port->netdev; 349 struct rtnl_link_stats64 *stats = &port->stats; 350 struct hcp_ehea_port_cb2 *cb2; 351 u64 hret; 352 353 cb2 = (void *)get_zeroed_page(GFP_KERNEL); 354 if (!cb2) { 355 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n"); 356 goto resched; 357 } 358 359 hret = ehea_h_query_ehea_port(port->adapter->handle, 360 port->logical_port_id, 361 H_PORT_CB2, H_PORT_CB2_ALL, cb2); 362 if (hret != H_SUCCESS) { 363 netdev_err(dev, "query_ehea_port failed\n"); 364 goto out_herr; 365 } 366 367 if (netif_msg_hw(port)) 368 ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); 369 370 stats->multicast = cb2->rxmcp; 371 stats->rx_errors = cb2->rxuerr; 372 373 out_herr: 374 free_page((unsigned long)cb2); 375 resched: 376 schedule_delayed_work(&port->stats_work, 377 round_jiffies_relative(msecs_to_jiffies(1000))); 378 } 379 380 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) 381 { 382 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 383 struct net_device *dev = pr->port->netdev; 384 int max_index_mask = pr->rq1_skba.len - 1; 385 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; 386 int adder = 0; 387 int i; 388 389 pr->rq1_skba.os_skbs = 0; 390 391 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 392 if (nr_of_wqes > 0) 393 pr->rq1_skba.index = index; 394 pr->rq1_skba.os_skbs = fill_wqes; 395 return; 396 } 397 398 for (i = 0; i < fill_wqes; i++) { 399 if (!skb_arr_rq1[index]) { 400 skb_arr_rq1[index] = netdev_alloc_skb(dev, 401 EHEA_L_PKT_SIZE); 402 if (!skb_arr_rq1[index]) { 403 netdev_info(dev, "Unable to allocate enough skb in the array\n"); 404 pr->rq1_skba.os_skbs = fill_wqes - i; 405 break; 406 } 407 } 408 index--; 409 index &= max_index_mask; 410 adder++; 411 } 412 413 if (adder == 0) 414 return; 415 416 /* Ring doorbell */ 417 ehea_update_rq1a(pr->qp, adder); 418 } 419 420 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) 421 { 422 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 423 struct net_device *dev = pr->port->netdev; 424 int i; 425 426 if (nr_rq1a > pr->rq1_skba.len) { 427 netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); 428 return; 429 } 430 431 for (i = 0; i < nr_rq1a; i++) { 432 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); 433 if (!skb_arr_rq1[i]) { 434 netdev_info(dev, "Not enough memory to allocate skb array\n"); 435 break; 436 } 437 } 438 /* Ring doorbell */ 439 ehea_update_rq1a(pr->qp, i - 1); 440 } 441 442 static int ehea_refill_rq_def(struct ehea_port_res *pr, 443 struct ehea_q_skb_arr *q_skba, int rq_nr, 444 int num_wqes, int wqe_type, int packet_size) 445 { 446 struct net_device *dev = pr->port->netdev; 447 struct ehea_qp *qp = pr->qp; 448 struct sk_buff **skb_arr = q_skba->arr; 449 struct ehea_rwqe *rwqe; 450 int i, index, max_index_mask, fill_wqes; 451 int adder = 0; 452 int ret = 0; 453 454 fill_wqes = q_skba->os_skbs + num_wqes; 455 q_skba->os_skbs = 0; 456 457 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 458 q_skba->os_skbs = fill_wqes; 459 return ret; 460 } 461 462 index = q_skba->index; 463 max_index_mask = q_skba->len - 1; 464 for (i = 0; i < fill_wqes; i++) { 465 u64 tmp_addr; 466 struct sk_buff *skb; 467 468 skb = netdev_alloc_skb_ip_align(dev, packet_size); 469 if (!skb) { 470 q_skba->os_skbs = fill_wqes - i; 471 if (q_skba->os_skbs == q_skba->len - 2) { 472 netdev_info(pr->port->netdev, 473 "rq%i ran dry - no mem for skb\n", 474 rq_nr); 475 ret = -ENOMEM; 476 } 477 break; 478 } 479 480 skb_arr[index] = skb; 481 tmp_addr = ehea_map_vaddr(skb->data); 482 if (tmp_addr == -1) { 483 dev_kfree_skb(skb); 484 q_skba->os_skbs = fill_wqes - i; 485 ret = 0; 486 break; 487 } 488 489 rwqe = ehea_get_next_rwqe(qp, rq_nr); 490 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type) 491 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index); 492 rwqe->sg_list[0].l_key = pr->recv_mr.lkey; 493 rwqe->sg_list[0].vaddr = tmp_addr; 494 rwqe->sg_list[0].len = packet_size; 495 rwqe->data_segments = 1; 496 497 index++; 498 index &= max_index_mask; 499 adder++; 500 } 501 502 q_skba->index = index; 503 if (adder == 0) 504 goto out; 505 506 /* Ring doorbell */ 507 iosync(); 508 if (rq_nr == 2) 509 ehea_update_rq2a(pr->qp, adder); 510 else 511 ehea_update_rq3a(pr->qp, adder); 512 out: 513 return ret; 514 } 515 516 517 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) 518 { 519 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, 520 nr_of_wqes, EHEA_RWQE2_TYPE, 521 EHEA_RQ2_PKT_SIZE); 522 } 523 524 525 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) 526 { 527 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, 528 nr_of_wqes, EHEA_RWQE3_TYPE, 529 EHEA_MAX_PACKET_SIZE); 530 } 531 532 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) 533 { 534 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; 535 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) 536 return 0; 537 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && 538 (cqe->header_length == 0)) 539 return 0; 540 return -EINVAL; 541 } 542 543 static inline void ehea_fill_skb(struct net_device *dev, 544 struct sk_buff *skb, struct ehea_cqe *cqe, 545 struct ehea_port_res *pr) 546 { 547 int length = cqe->num_bytes_transfered - 4; /*remove CRC */ 548 549 skb_put(skb, length); 550 skb->protocol = eth_type_trans(skb, dev); 551 552 /* The packet was not an IPV4 packet so a complemented checksum was 553 calculated. The value is found in the Internet Checksum field. */ 554 if (cqe->status & EHEA_CQE_BLIND_CKSUM) { 555 skb->ip_summed = CHECKSUM_COMPLETE; 556 skb->csum = csum_unfold(~cqe->inet_checksum_value); 557 } else 558 skb->ip_summed = CHECKSUM_UNNECESSARY; 559 560 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]); 561 } 562 563 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, 564 int arr_len, 565 struct ehea_cqe *cqe) 566 { 567 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 568 struct sk_buff *skb; 569 void *pref; 570 int x; 571 572 x = skb_index + 1; 573 x &= (arr_len - 1); 574 575 pref = skb_array[x]; 576 if (pref) { 577 prefetchw(pref); 578 prefetchw(pref + EHEA_CACHE_LINE); 579 580 pref = (skb_array[x]->data); 581 prefetch(pref); 582 prefetch(pref + EHEA_CACHE_LINE); 583 prefetch(pref + EHEA_CACHE_LINE * 2); 584 prefetch(pref + EHEA_CACHE_LINE * 3); 585 } 586 587 skb = skb_array[skb_index]; 588 skb_array[skb_index] = NULL; 589 return skb; 590 } 591 592 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, 593 int arr_len, int wqe_index) 594 { 595 struct sk_buff *skb; 596 void *pref; 597 int x; 598 599 x = wqe_index + 1; 600 x &= (arr_len - 1); 601 602 pref = skb_array[x]; 603 if (pref) { 604 prefetchw(pref); 605 prefetchw(pref + EHEA_CACHE_LINE); 606 607 pref = (skb_array[x]->data); 608 prefetchw(pref); 609 prefetchw(pref + EHEA_CACHE_LINE); 610 } 611 612 skb = skb_array[wqe_index]; 613 skb_array[wqe_index] = NULL; 614 return skb; 615 } 616 617 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, 618 struct ehea_cqe *cqe, int *processed_rq2, 619 int *processed_rq3) 620 { 621 struct sk_buff *skb; 622 623 if (cqe->status & EHEA_CQE_STAT_ERR_TCP) 624 pr->p_stats.err_tcp_cksum++; 625 if (cqe->status & EHEA_CQE_STAT_ERR_IP) 626 pr->p_stats.err_ip_cksum++; 627 if (cqe->status & EHEA_CQE_STAT_ERR_CRC) 628 pr->p_stats.err_frame_crc++; 629 630 if (rq == 2) { 631 *processed_rq2 += 1; 632 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe); 633 dev_kfree_skb(skb); 634 } else if (rq == 3) { 635 *processed_rq3 += 1; 636 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe); 637 dev_kfree_skb(skb); 638 } 639 640 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) { 641 if (netif_msg_rx_err(pr->port)) { 642 pr_err("Critical receive error for QP %d. Resetting port.\n", 643 pr->qp->init_attr.qp_nr); 644 ehea_dump(cqe, sizeof(*cqe), "CQE"); 645 } 646 ehea_schedule_port_reset(pr->port); 647 return 1; 648 } 649 650 return 0; 651 } 652 653 static int ehea_proc_rwqes(struct net_device *dev, 654 struct ehea_port_res *pr, 655 int budget) 656 { 657 struct ehea_port *port = pr->port; 658 struct ehea_qp *qp = pr->qp; 659 struct ehea_cqe *cqe; 660 struct sk_buff *skb; 661 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 662 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; 663 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; 664 int skb_arr_rq1_len = pr->rq1_skba.len; 665 int skb_arr_rq2_len = pr->rq2_skba.len; 666 int skb_arr_rq3_len = pr->rq3_skba.len; 667 int processed, processed_rq1, processed_rq2, processed_rq3; 668 u64 processed_bytes = 0; 669 int wqe_index, last_wqe_index, rq, port_reset; 670 671 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; 672 last_wqe_index = 0; 673 674 cqe = ehea_poll_rq1(qp, &wqe_index); 675 while ((processed < budget) && cqe) { 676 ehea_inc_rq1(qp); 677 processed_rq1++; 678 processed++; 679 if (netif_msg_rx_status(port)) 680 ehea_dump(cqe, sizeof(*cqe), "CQE"); 681 682 last_wqe_index = wqe_index; 683 rmb(); 684 if (!ehea_check_cqe(cqe, &rq)) { 685 if (rq == 1) { 686 /* LL RQ1 */ 687 skb = get_skb_by_index_ll(skb_arr_rq1, 688 skb_arr_rq1_len, 689 wqe_index); 690 if (unlikely(!skb)) { 691 netif_info(port, rx_err, dev, 692 "LL rq1: skb=NULL\n"); 693 694 skb = netdev_alloc_skb(dev, 695 EHEA_L_PKT_SIZE); 696 if (!skb) { 697 netdev_err(dev, "Not enough memory to allocate skb\n"); 698 break; 699 } 700 } 701 skb_copy_to_linear_data(skb, ((char *)cqe) + 64, 702 cqe->num_bytes_transfered - 4); 703 ehea_fill_skb(dev, skb, cqe, pr); 704 } else if (rq == 2) { 705 /* RQ2 */ 706 skb = get_skb_by_index(skb_arr_rq2, 707 skb_arr_rq2_len, cqe); 708 if (unlikely(!skb)) { 709 netif_err(port, rx_err, dev, 710 "rq2: skb=NULL\n"); 711 break; 712 } 713 ehea_fill_skb(dev, skb, cqe, pr); 714 processed_rq2++; 715 } else { 716 /* RQ3 */ 717 skb = get_skb_by_index(skb_arr_rq3, 718 skb_arr_rq3_len, cqe); 719 if (unlikely(!skb)) { 720 netif_err(port, rx_err, dev, 721 "rq3: skb=NULL\n"); 722 break; 723 } 724 ehea_fill_skb(dev, skb, cqe, pr); 725 processed_rq3++; 726 } 727 728 processed_bytes += skb->len; 729 730 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 731 __vlan_hwaccel_put_tag(skb, cqe->vlan_tag); 732 733 napi_gro_receive(&pr->napi, skb); 734 } else { 735 pr->p_stats.poll_receive_errors++; 736 port_reset = ehea_treat_poll_error(pr, rq, cqe, 737 &processed_rq2, 738 &processed_rq3); 739 if (port_reset) 740 break; 741 } 742 cqe = ehea_poll_rq1(qp, &wqe_index); 743 } 744 745 pr->rx_packets += processed; 746 pr->rx_bytes += processed_bytes; 747 748 ehea_refill_rq1(pr, last_wqe_index, processed_rq1); 749 ehea_refill_rq2(pr, processed_rq2); 750 ehea_refill_rq3(pr, processed_rq3); 751 752 return processed; 753 } 754 755 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull 756 757 static void reset_sq_restart_flag(struct ehea_port *port) 758 { 759 int i; 760 761 for (i = 0; i < port->num_def_qps; i++) { 762 struct ehea_port_res *pr = &port->port_res[i]; 763 pr->sq_restart_flag = 0; 764 } 765 wake_up(&port->restart_wq); 766 } 767 768 static void check_sqs(struct ehea_port *port) 769 { 770 struct ehea_swqe *swqe; 771 int swqe_index; 772 int i, k; 773 774 for (i = 0; i < port->num_def_qps; i++) { 775 struct ehea_port_res *pr = &port->port_res[i]; 776 int ret; 777 k = 0; 778 swqe = ehea_get_swqe(pr->qp, &swqe_index); 779 memset(swqe, 0, SWQE_HEADER_SIZE); 780 atomic_dec(&pr->swqe_avail); 781 782 swqe->tx_control |= EHEA_SWQE_PURGE; 783 swqe->wr_id = SWQE_RESTART_CHECK; 784 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 785 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; 786 swqe->immediate_data_length = 80; 787 788 ehea_post_swqe(pr->qp, swqe); 789 790 ret = wait_event_timeout(port->restart_wq, 791 pr->sq_restart_flag == 0, 792 msecs_to_jiffies(100)); 793 794 if (!ret) { 795 pr_err("HW/SW queues out of sync\n"); 796 ehea_schedule_port_reset(pr->port); 797 return; 798 } 799 } 800 } 801 802 803 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) 804 { 805 struct sk_buff *skb; 806 struct ehea_cq *send_cq = pr->send_cq; 807 struct ehea_cqe *cqe; 808 int quota = my_quota; 809 int cqe_counter = 0; 810 int swqe_av = 0; 811 int index; 812 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, 813 pr - &pr->port->port_res[0]); 814 815 cqe = ehea_poll_cq(send_cq); 816 while (cqe && (quota > 0)) { 817 ehea_inc_cq(send_cq); 818 819 cqe_counter++; 820 rmb(); 821 822 if (cqe->wr_id == SWQE_RESTART_CHECK) { 823 pr->sq_restart_flag = 1; 824 swqe_av++; 825 break; 826 } 827 828 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { 829 pr_err("Bad send completion status=0x%04X\n", 830 cqe->status); 831 832 if (netif_msg_tx_err(pr->port)) 833 ehea_dump(cqe, sizeof(*cqe), "Send CQE"); 834 835 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { 836 pr_err("Resetting port\n"); 837 ehea_schedule_port_reset(pr->port); 838 break; 839 } 840 } 841 842 if (netif_msg_tx_done(pr->port)) 843 ehea_dump(cqe, sizeof(*cqe), "CQE"); 844 845 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) 846 == EHEA_SWQE2_TYPE)) { 847 848 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 849 skb = pr->sq_skba.arr[index]; 850 dev_kfree_skb(skb); 851 pr->sq_skba.arr[index] = NULL; 852 } 853 854 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); 855 quota--; 856 857 cqe = ehea_poll_cq(send_cq); 858 } 859 860 ehea_update_feca(send_cq, cqe_counter); 861 atomic_add(swqe_av, &pr->swqe_avail); 862 863 if (unlikely(netif_tx_queue_stopped(txq) && 864 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { 865 __netif_tx_lock(txq, smp_processor_id()); 866 if (netif_tx_queue_stopped(txq) && 867 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) 868 netif_tx_wake_queue(txq); 869 __netif_tx_unlock(txq); 870 } 871 872 wake_up(&pr->port->swqe_avail_wq); 873 874 return cqe; 875 } 876 877 #define EHEA_POLL_MAX_CQES 65535 878 879 static int ehea_poll(struct napi_struct *napi, int budget) 880 { 881 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, 882 napi); 883 struct net_device *dev = pr->port->netdev; 884 struct ehea_cqe *cqe; 885 struct ehea_cqe *cqe_skb = NULL; 886 int wqe_index; 887 int rx = 0; 888 889 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 890 rx += ehea_proc_rwqes(dev, pr, budget - rx); 891 892 while (rx != budget) { 893 napi_complete(napi); 894 ehea_reset_cq_ep(pr->recv_cq); 895 ehea_reset_cq_ep(pr->send_cq); 896 ehea_reset_cq_n1(pr->recv_cq); 897 ehea_reset_cq_n1(pr->send_cq); 898 rmb(); 899 cqe = ehea_poll_rq1(pr->qp, &wqe_index); 900 cqe_skb = ehea_poll_cq(pr->send_cq); 901 902 if (!cqe && !cqe_skb) 903 return rx; 904 905 if (!napi_reschedule(napi)) 906 return rx; 907 908 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 909 rx += ehea_proc_rwqes(dev, pr, budget - rx); 910 } 911 912 return rx; 913 } 914 915 #ifdef CONFIG_NET_POLL_CONTROLLER 916 static void ehea_netpoll(struct net_device *dev) 917 { 918 struct ehea_port *port = netdev_priv(dev); 919 int i; 920 921 for (i = 0; i < port->num_def_qps; i++) 922 napi_schedule(&port->port_res[i].napi); 923 } 924 #endif 925 926 static irqreturn_t ehea_recv_irq_handler(int irq, void *param) 927 { 928 struct ehea_port_res *pr = param; 929 930 napi_schedule(&pr->napi); 931 932 return IRQ_HANDLED; 933 } 934 935 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) 936 { 937 struct ehea_port *port = param; 938 struct ehea_eqe *eqe; 939 struct ehea_qp *qp; 940 u32 qp_token; 941 u64 resource_type, aer, aerr; 942 int reset_port = 0; 943 944 eqe = ehea_poll_eq(port->qp_eq); 945 946 while (eqe) { 947 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); 948 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", 949 eqe->entry, qp_token); 950 951 qp = port->port_res[qp_token].qp; 952 953 resource_type = ehea_error_data(port->adapter, qp->fw_handle, 954 &aer, &aerr); 955 956 if (resource_type == EHEA_AER_RESTYPE_QP) { 957 if ((aer & EHEA_AER_RESET_MASK) || 958 (aerr & EHEA_AERR_RESET_MASK)) 959 reset_port = 1; 960 } else 961 reset_port = 1; /* Reset in case of CQ or EQ error */ 962 963 eqe = ehea_poll_eq(port->qp_eq); 964 } 965 966 if (reset_port) { 967 pr_err("Resetting port\n"); 968 ehea_schedule_port_reset(port); 969 } 970 971 return IRQ_HANDLED; 972 } 973 974 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, 975 int logical_port) 976 { 977 int i; 978 979 for (i = 0; i < EHEA_MAX_PORTS; i++) 980 if (adapter->port[i]) 981 if (adapter->port[i]->logical_port_id == logical_port) 982 return adapter->port[i]; 983 return NULL; 984 } 985 986 int ehea_sense_port_attr(struct ehea_port *port) 987 { 988 int ret; 989 u64 hret; 990 struct hcp_ehea_port_cb0 *cb0; 991 992 /* may be called via ehea_neq_tasklet() */ 993 cb0 = (void *)get_zeroed_page(GFP_ATOMIC); 994 if (!cb0) { 995 pr_err("no mem for cb0\n"); 996 ret = -ENOMEM; 997 goto out; 998 } 999 1000 hret = ehea_h_query_ehea_port(port->adapter->handle, 1001 port->logical_port_id, H_PORT_CB0, 1002 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), 1003 cb0); 1004 if (hret != H_SUCCESS) { 1005 ret = -EIO; 1006 goto out_free; 1007 } 1008 1009 /* MAC address */ 1010 port->mac_addr = cb0->port_mac_addr << 16; 1011 1012 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { 1013 ret = -EADDRNOTAVAIL; 1014 goto out_free; 1015 } 1016 1017 /* Port speed */ 1018 switch (cb0->port_speed) { 1019 case H_SPEED_10M_H: 1020 port->port_speed = EHEA_SPEED_10M; 1021 port->full_duplex = 0; 1022 break; 1023 case H_SPEED_10M_F: 1024 port->port_speed = EHEA_SPEED_10M; 1025 port->full_duplex = 1; 1026 break; 1027 case H_SPEED_100M_H: 1028 port->port_speed = EHEA_SPEED_100M; 1029 port->full_duplex = 0; 1030 break; 1031 case H_SPEED_100M_F: 1032 port->port_speed = EHEA_SPEED_100M; 1033 port->full_duplex = 1; 1034 break; 1035 case H_SPEED_1G_F: 1036 port->port_speed = EHEA_SPEED_1G; 1037 port->full_duplex = 1; 1038 break; 1039 case H_SPEED_10G_F: 1040 port->port_speed = EHEA_SPEED_10G; 1041 port->full_duplex = 1; 1042 break; 1043 default: 1044 port->port_speed = 0; 1045 port->full_duplex = 0; 1046 break; 1047 } 1048 1049 port->autoneg = 1; 1050 port->num_mcs = cb0->num_default_qps; 1051 1052 /* Number of default QPs */ 1053 if (use_mcs) 1054 port->num_def_qps = cb0->num_default_qps; 1055 else 1056 port->num_def_qps = 1; 1057 1058 if (!port->num_def_qps) { 1059 ret = -EINVAL; 1060 goto out_free; 1061 } 1062 1063 ret = 0; 1064 out_free: 1065 if (ret || netif_msg_probe(port)) 1066 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); 1067 free_page((unsigned long)cb0); 1068 out: 1069 return ret; 1070 } 1071 1072 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) 1073 { 1074 struct hcp_ehea_port_cb4 *cb4; 1075 u64 hret; 1076 int ret = 0; 1077 1078 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 1079 if (!cb4) { 1080 pr_err("no mem for cb4\n"); 1081 ret = -ENOMEM; 1082 goto out; 1083 } 1084 1085 cb4->port_speed = port_speed; 1086 1087 netif_carrier_off(port->netdev); 1088 1089 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1090 port->logical_port_id, 1091 H_PORT_CB4, H_PORT_CB4_SPEED, cb4); 1092 if (hret == H_SUCCESS) { 1093 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; 1094 1095 hret = ehea_h_query_ehea_port(port->adapter->handle, 1096 port->logical_port_id, 1097 H_PORT_CB4, H_PORT_CB4_SPEED, 1098 cb4); 1099 if (hret == H_SUCCESS) { 1100 switch (cb4->port_speed) { 1101 case H_SPEED_10M_H: 1102 port->port_speed = EHEA_SPEED_10M; 1103 port->full_duplex = 0; 1104 break; 1105 case H_SPEED_10M_F: 1106 port->port_speed = EHEA_SPEED_10M; 1107 port->full_duplex = 1; 1108 break; 1109 case H_SPEED_100M_H: 1110 port->port_speed = EHEA_SPEED_100M; 1111 port->full_duplex = 0; 1112 break; 1113 case H_SPEED_100M_F: 1114 port->port_speed = EHEA_SPEED_100M; 1115 port->full_duplex = 1; 1116 break; 1117 case H_SPEED_1G_F: 1118 port->port_speed = EHEA_SPEED_1G; 1119 port->full_duplex = 1; 1120 break; 1121 case H_SPEED_10G_F: 1122 port->port_speed = EHEA_SPEED_10G; 1123 port->full_duplex = 1; 1124 break; 1125 default: 1126 port->port_speed = 0; 1127 port->full_duplex = 0; 1128 break; 1129 } 1130 } else { 1131 pr_err("Failed sensing port speed\n"); 1132 ret = -EIO; 1133 } 1134 } else { 1135 if (hret == H_AUTHORITY) { 1136 pr_info("Hypervisor denied setting port speed\n"); 1137 ret = -EPERM; 1138 } else { 1139 ret = -EIO; 1140 pr_err("Failed setting port speed\n"); 1141 } 1142 } 1143 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) 1144 netif_carrier_on(port->netdev); 1145 1146 free_page((unsigned long)cb4); 1147 out: 1148 return ret; 1149 } 1150 1151 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) 1152 { 1153 int ret; 1154 u8 ec; 1155 u8 portnum; 1156 struct ehea_port *port; 1157 struct net_device *dev; 1158 1159 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); 1160 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); 1161 port = ehea_get_port(adapter, portnum); 1162 dev = port->netdev; 1163 1164 switch (ec) { 1165 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1166 1167 if (!port) { 1168 netdev_err(dev, "unknown portnum %x\n", portnum); 1169 break; 1170 } 1171 1172 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1173 if (!netif_carrier_ok(dev)) { 1174 ret = ehea_sense_port_attr(port); 1175 if (ret) { 1176 netdev_err(dev, "failed resensing port attributes\n"); 1177 break; 1178 } 1179 1180 netif_info(port, link, dev, 1181 "Logical port up: %dMbps %s Duplex\n", 1182 port->port_speed, 1183 port->full_duplex == 1 ? 1184 "Full" : "Half"); 1185 1186 netif_carrier_on(dev); 1187 netif_wake_queue(dev); 1188 } 1189 } else 1190 if (netif_carrier_ok(dev)) { 1191 netif_info(port, link, dev, 1192 "Logical port down\n"); 1193 netif_carrier_off(dev); 1194 netif_tx_disable(dev); 1195 } 1196 1197 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1198 port->phy_link = EHEA_PHY_LINK_UP; 1199 netif_info(port, link, dev, 1200 "Physical port up\n"); 1201 if (prop_carrier_state) 1202 netif_carrier_on(dev); 1203 } else { 1204 port->phy_link = EHEA_PHY_LINK_DOWN; 1205 netif_info(port, link, dev, 1206 "Physical port down\n"); 1207 if (prop_carrier_state) 1208 netif_carrier_off(dev); 1209 } 1210 1211 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1212 netdev_info(dev, 1213 "External switch port is primary port\n"); 1214 else 1215 netdev_info(dev, 1216 "External switch port is backup port\n"); 1217 1218 break; 1219 case EHEA_EC_ADAPTER_MALFUNC: 1220 netdev_err(dev, "Adapter malfunction\n"); 1221 break; 1222 case EHEA_EC_PORT_MALFUNC: 1223 netdev_info(dev, "Port malfunction\n"); 1224 netif_carrier_off(dev); 1225 netif_tx_disable(dev); 1226 break; 1227 default: 1228 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1229 break; 1230 } 1231 } 1232 1233 static void ehea_neq_tasklet(unsigned long data) 1234 { 1235 struct ehea_adapter *adapter = (struct ehea_adapter *)data; 1236 struct ehea_eqe *eqe; 1237 u64 event_mask; 1238 1239 eqe = ehea_poll_eq(adapter->neq); 1240 pr_debug("eqe=%p\n", eqe); 1241 1242 while (eqe) { 1243 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1244 ehea_parse_eqe(adapter, eqe->entry); 1245 eqe = ehea_poll_eq(adapter->neq); 1246 pr_debug("next eqe=%p\n", eqe); 1247 } 1248 1249 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1250 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1251 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1252 1253 ehea_h_reset_events(adapter->handle, 1254 adapter->neq->fw_handle, event_mask); 1255 } 1256 1257 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1258 { 1259 struct ehea_adapter *adapter = param; 1260 tasklet_hi_schedule(&adapter->neq_tasklet); 1261 return IRQ_HANDLED; 1262 } 1263 1264 1265 static int ehea_fill_port_res(struct ehea_port_res *pr) 1266 { 1267 int ret; 1268 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1269 1270 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1271 1272 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1273 1274 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1275 1276 return ret; 1277 } 1278 1279 static int ehea_reg_interrupts(struct net_device *dev) 1280 { 1281 struct ehea_port *port = netdev_priv(dev); 1282 struct ehea_port_res *pr; 1283 int i, ret; 1284 1285 1286 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1287 dev->name); 1288 1289 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1290 ehea_qp_aff_irq_handler, 1291 IRQF_DISABLED, port->int_aff_name, port); 1292 if (ret) { 1293 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1294 port->qp_eq->attr.ist1); 1295 goto out_free_qpeq; 1296 } 1297 1298 netif_info(port, ifup, dev, 1299 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1300 port->qp_eq->attr.ist1); 1301 1302 1303 for (i = 0; i < port->num_def_qps; i++) { 1304 pr = &port->port_res[i]; 1305 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1306 "%s-queue%d", dev->name, i); 1307 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1308 ehea_recv_irq_handler, 1309 IRQF_DISABLED, pr->int_send_name, 1310 pr); 1311 if (ret) { 1312 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1313 i, pr->eq->attr.ist1); 1314 goto out_free_req; 1315 } 1316 netif_info(port, ifup, dev, 1317 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1318 pr->eq->attr.ist1, i); 1319 } 1320 out: 1321 return ret; 1322 1323 1324 out_free_req: 1325 while (--i >= 0) { 1326 u32 ist = port->port_res[i].eq->attr.ist1; 1327 ibmebus_free_irq(ist, &port->port_res[i]); 1328 } 1329 1330 out_free_qpeq: 1331 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1332 i = port->num_def_qps; 1333 1334 goto out; 1335 1336 } 1337 1338 static void ehea_free_interrupts(struct net_device *dev) 1339 { 1340 struct ehea_port *port = netdev_priv(dev); 1341 struct ehea_port_res *pr; 1342 int i; 1343 1344 /* send */ 1345 1346 for (i = 0; i < port->num_def_qps; i++) { 1347 pr = &port->port_res[i]; 1348 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1349 netif_info(port, intr, dev, 1350 "free send irq for res %d with handle 0x%X\n", 1351 i, pr->eq->attr.ist1); 1352 } 1353 1354 /* associated events */ 1355 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1356 netif_info(port, intr, dev, 1357 "associated event interrupt for handle 0x%X freed\n", 1358 port->qp_eq->attr.ist1); 1359 } 1360 1361 static int ehea_configure_port(struct ehea_port *port) 1362 { 1363 int ret, i; 1364 u64 hret, mask; 1365 struct hcp_ehea_port_cb0 *cb0; 1366 1367 ret = -ENOMEM; 1368 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1369 if (!cb0) 1370 goto out; 1371 1372 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1373 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1374 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1375 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1376 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1377 PXLY_RC_VLAN_FILTER) 1378 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1379 1380 for (i = 0; i < port->num_mcs; i++) 1381 if (use_mcs) 1382 cb0->default_qpn_arr[i] = 1383 port->port_res[i].qp->init_attr.qp_nr; 1384 else 1385 cb0->default_qpn_arr[i] = 1386 port->port_res[0].qp->init_attr.qp_nr; 1387 1388 if (netif_msg_ifup(port)) 1389 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1390 1391 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1392 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1393 1394 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1395 port->logical_port_id, 1396 H_PORT_CB0, mask, cb0); 1397 ret = -EIO; 1398 if (hret != H_SUCCESS) 1399 goto out_free; 1400 1401 ret = 0; 1402 1403 out_free: 1404 free_page((unsigned long)cb0); 1405 out: 1406 return ret; 1407 } 1408 1409 static int ehea_gen_smrs(struct ehea_port_res *pr) 1410 { 1411 int ret; 1412 struct ehea_adapter *adapter = pr->port->adapter; 1413 1414 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1415 if (ret) 1416 goto out; 1417 1418 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1419 if (ret) 1420 goto out_free; 1421 1422 return 0; 1423 1424 out_free: 1425 ehea_rem_mr(&pr->send_mr); 1426 out: 1427 pr_err("Generating SMRS failed\n"); 1428 return -EIO; 1429 } 1430 1431 static int ehea_rem_smrs(struct ehea_port_res *pr) 1432 { 1433 if ((ehea_rem_mr(&pr->send_mr)) || 1434 (ehea_rem_mr(&pr->recv_mr))) 1435 return -EIO; 1436 else 1437 return 0; 1438 } 1439 1440 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1441 { 1442 int arr_size = sizeof(void *) * max_q_entries; 1443 1444 q_skba->arr = vzalloc(arr_size); 1445 if (!q_skba->arr) 1446 return -ENOMEM; 1447 1448 q_skba->len = max_q_entries; 1449 q_skba->index = 0; 1450 q_skba->os_skbs = 0; 1451 1452 return 0; 1453 } 1454 1455 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1456 struct port_res_cfg *pr_cfg, int queue_token) 1457 { 1458 struct ehea_adapter *adapter = port->adapter; 1459 enum ehea_eq_type eq_type = EHEA_EQ; 1460 struct ehea_qp_init_attr *init_attr = NULL; 1461 int ret = -EIO; 1462 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1463 1464 tx_bytes = pr->tx_bytes; 1465 tx_packets = pr->tx_packets; 1466 rx_bytes = pr->rx_bytes; 1467 rx_packets = pr->rx_packets; 1468 1469 memset(pr, 0, sizeof(struct ehea_port_res)); 1470 1471 pr->tx_bytes = rx_bytes; 1472 pr->tx_packets = tx_packets; 1473 pr->rx_bytes = rx_bytes; 1474 pr->rx_packets = rx_packets; 1475 1476 pr->port = port; 1477 1478 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1479 if (!pr->eq) { 1480 pr_err("create_eq failed (eq)\n"); 1481 goto out_free; 1482 } 1483 1484 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1485 pr->eq->fw_handle, 1486 port->logical_port_id); 1487 if (!pr->recv_cq) { 1488 pr_err("create_cq failed (cq_recv)\n"); 1489 goto out_free; 1490 } 1491 1492 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1493 pr->eq->fw_handle, 1494 port->logical_port_id); 1495 if (!pr->send_cq) { 1496 pr_err("create_cq failed (cq_send)\n"); 1497 goto out_free; 1498 } 1499 1500 if (netif_msg_ifup(port)) 1501 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1502 pr->send_cq->attr.act_nr_of_cqes, 1503 pr->recv_cq->attr.act_nr_of_cqes); 1504 1505 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1506 if (!init_attr) { 1507 ret = -ENOMEM; 1508 pr_err("no mem for ehea_qp_init_attr\n"); 1509 goto out_free; 1510 } 1511 1512 init_attr->low_lat_rq1 = 1; 1513 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1514 init_attr->rq_count = 3; 1515 init_attr->qp_token = queue_token; 1516 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1517 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1518 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1519 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1520 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1521 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1522 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1523 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1524 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1525 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1526 init_attr->port_nr = port->logical_port_id; 1527 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1528 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1529 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1530 1531 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1532 if (!pr->qp) { 1533 pr_err("create_qp failed\n"); 1534 ret = -EIO; 1535 goto out_free; 1536 } 1537 1538 if (netif_msg_ifup(port)) 1539 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", 1540 init_attr->qp_nr, 1541 init_attr->act_nr_send_wqes, 1542 init_attr->act_nr_rwqes_rq1, 1543 init_attr->act_nr_rwqes_rq2, 1544 init_attr->act_nr_rwqes_rq3); 1545 1546 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1547 1548 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1549 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1550 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1551 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1552 if (ret) 1553 goto out_free; 1554 1555 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1556 if (ehea_gen_smrs(pr) != 0) { 1557 ret = -EIO; 1558 goto out_free; 1559 } 1560 1561 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1562 1563 kfree(init_attr); 1564 1565 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); 1566 1567 ret = 0; 1568 goto out; 1569 1570 out_free: 1571 kfree(init_attr); 1572 vfree(pr->sq_skba.arr); 1573 vfree(pr->rq1_skba.arr); 1574 vfree(pr->rq2_skba.arr); 1575 vfree(pr->rq3_skba.arr); 1576 ehea_destroy_qp(pr->qp); 1577 ehea_destroy_cq(pr->send_cq); 1578 ehea_destroy_cq(pr->recv_cq); 1579 ehea_destroy_eq(pr->eq); 1580 out: 1581 return ret; 1582 } 1583 1584 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1585 { 1586 int ret, i; 1587 1588 if (pr->qp) 1589 netif_napi_del(&pr->napi); 1590 1591 ret = ehea_destroy_qp(pr->qp); 1592 1593 if (!ret) { 1594 ehea_destroy_cq(pr->send_cq); 1595 ehea_destroy_cq(pr->recv_cq); 1596 ehea_destroy_eq(pr->eq); 1597 1598 for (i = 0; i < pr->rq1_skba.len; i++) 1599 if (pr->rq1_skba.arr[i]) 1600 dev_kfree_skb(pr->rq1_skba.arr[i]); 1601 1602 for (i = 0; i < pr->rq2_skba.len; i++) 1603 if (pr->rq2_skba.arr[i]) 1604 dev_kfree_skb(pr->rq2_skba.arr[i]); 1605 1606 for (i = 0; i < pr->rq3_skba.len; i++) 1607 if (pr->rq3_skba.arr[i]) 1608 dev_kfree_skb(pr->rq3_skba.arr[i]); 1609 1610 for (i = 0; i < pr->sq_skba.len; i++) 1611 if (pr->sq_skba.arr[i]) 1612 dev_kfree_skb(pr->sq_skba.arr[i]); 1613 1614 vfree(pr->rq1_skba.arr); 1615 vfree(pr->rq2_skba.arr); 1616 vfree(pr->rq3_skba.arr); 1617 vfree(pr->sq_skba.arr); 1618 ret = ehea_rem_smrs(pr); 1619 } 1620 return ret; 1621 } 1622 1623 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1624 u32 lkey) 1625 { 1626 int skb_data_size = skb_headlen(skb); 1627 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1628 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1629 unsigned int immediate_len = SWQE2_MAX_IMM; 1630 1631 swqe->descriptors = 0; 1632 1633 if (skb_is_gso(skb)) { 1634 swqe->tx_control |= EHEA_SWQE_TSO; 1635 swqe->mss = skb_shinfo(skb)->gso_size; 1636 /* 1637 * For TSO packets we only copy the headers into the 1638 * immediate area. 1639 */ 1640 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb); 1641 } 1642 1643 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1644 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1645 swqe->immediate_data_length = immediate_len; 1646 1647 if (skb_data_size > immediate_len) { 1648 sg1entry->l_key = lkey; 1649 sg1entry->len = skb_data_size - immediate_len; 1650 sg1entry->vaddr = 1651 ehea_map_vaddr(skb->data + immediate_len); 1652 swqe->descriptors++; 1653 } 1654 } else { 1655 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1656 swqe->immediate_data_length = skb_data_size; 1657 } 1658 } 1659 1660 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1661 struct ehea_swqe *swqe, u32 lkey) 1662 { 1663 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1664 skb_frag_t *frag; 1665 int nfrags, sg1entry_contains_frag_data, i; 1666 1667 nfrags = skb_shinfo(skb)->nr_frags; 1668 sg1entry = &swqe->u.immdata_desc.sg_entry; 1669 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1670 sg1entry_contains_frag_data = 0; 1671 1672 write_swqe2_immediate(skb, swqe, lkey); 1673 1674 /* write descriptors */ 1675 if (nfrags > 0) { 1676 if (swqe->descriptors == 0) { 1677 /* sg1entry not yet used */ 1678 frag = &skb_shinfo(skb)->frags[0]; 1679 1680 /* copy sg1entry data */ 1681 sg1entry->l_key = lkey; 1682 sg1entry->len = skb_frag_size(frag); 1683 sg1entry->vaddr = 1684 ehea_map_vaddr(skb_frag_address(frag)); 1685 swqe->descriptors++; 1686 sg1entry_contains_frag_data = 1; 1687 } 1688 1689 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1690 1691 frag = &skb_shinfo(skb)->frags[i]; 1692 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1693 1694 sgentry->l_key = lkey; 1695 sgentry->len = skb_frag_size(frag); 1696 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1697 swqe->descriptors++; 1698 } 1699 } 1700 } 1701 1702 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1703 { 1704 int ret = 0; 1705 u64 hret; 1706 u8 reg_type; 1707 1708 /* De/Register untagged packets */ 1709 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1710 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1711 port->logical_port_id, 1712 reg_type, port->mac_addr, 0, hcallid); 1713 if (hret != H_SUCCESS) { 1714 pr_err("%sregistering bc address failed (tagged)\n", 1715 hcallid == H_REG_BCMC ? "" : "de"); 1716 ret = -EIO; 1717 goto out_herr; 1718 } 1719 1720 /* De/Register VLAN packets */ 1721 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1722 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1723 port->logical_port_id, 1724 reg_type, port->mac_addr, 0, hcallid); 1725 if (hret != H_SUCCESS) { 1726 pr_err("%sregistering bc address failed (vlan)\n", 1727 hcallid == H_REG_BCMC ? "" : "de"); 1728 ret = -EIO; 1729 } 1730 out_herr: 1731 return ret; 1732 } 1733 1734 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1735 { 1736 struct ehea_port *port = netdev_priv(dev); 1737 struct sockaddr *mac_addr = sa; 1738 struct hcp_ehea_port_cb0 *cb0; 1739 int ret; 1740 u64 hret; 1741 1742 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1743 ret = -EADDRNOTAVAIL; 1744 goto out; 1745 } 1746 1747 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1748 if (!cb0) { 1749 pr_err("no mem for cb0\n"); 1750 ret = -ENOMEM; 1751 goto out; 1752 } 1753 1754 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1755 1756 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1757 1758 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1759 port->logical_port_id, H_PORT_CB0, 1760 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1761 if (hret != H_SUCCESS) { 1762 ret = -EIO; 1763 goto out_free; 1764 } 1765 1766 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); 1767 1768 /* Deregister old MAC in pHYP */ 1769 if (port->state == EHEA_PORT_UP) { 1770 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1771 if (ret) 1772 goto out_upregs; 1773 } 1774 1775 port->mac_addr = cb0->port_mac_addr << 16; 1776 1777 /* Register new MAC in pHYP */ 1778 if (port->state == EHEA_PORT_UP) { 1779 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1780 if (ret) 1781 goto out_upregs; 1782 } 1783 1784 ret = 0; 1785 1786 out_upregs: 1787 ehea_update_bcmc_registrations(); 1788 out_free: 1789 free_page((unsigned long)cb0); 1790 out: 1791 return ret; 1792 } 1793 1794 static void ehea_promiscuous_error(u64 hret, int enable) 1795 { 1796 if (hret == H_AUTHORITY) 1797 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1798 enable == 1 ? "en" : "dis"); 1799 else 1800 pr_err("failed %sabling promiscuous mode\n", 1801 enable == 1 ? "en" : "dis"); 1802 } 1803 1804 static void ehea_promiscuous(struct net_device *dev, int enable) 1805 { 1806 struct ehea_port *port = netdev_priv(dev); 1807 struct hcp_ehea_port_cb7 *cb7; 1808 u64 hret; 1809 1810 if (enable == port->promisc) 1811 return; 1812 1813 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1814 if (!cb7) { 1815 pr_err("no mem for cb7\n"); 1816 goto out; 1817 } 1818 1819 /* Modify Pxs_DUCQPN in CB7 */ 1820 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1821 1822 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1823 port->logical_port_id, 1824 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1825 if (hret) { 1826 ehea_promiscuous_error(hret, enable); 1827 goto out; 1828 } 1829 1830 port->promisc = enable; 1831 out: 1832 free_page((unsigned long)cb7); 1833 } 1834 1835 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1836 u32 hcallid) 1837 { 1838 u64 hret; 1839 u8 reg_type; 1840 1841 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST 1842 | EHEA_BCMC_UNTAGGED; 1843 1844 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1845 port->logical_port_id, 1846 reg_type, mc_mac_addr, 0, hcallid); 1847 if (hret) 1848 goto out; 1849 1850 reg_type = EHEA_BCMC_SCOPE_ALL | EHEA_BCMC_MULTICAST 1851 | EHEA_BCMC_VLANID_ALL; 1852 1853 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1854 port->logical_port_id, 1855 reg_type, mc_mac_addr, 0, hcallid); 1856 out: 1857 return hret; 1858 } 1859 1860 static int ehea_drop_multicast_list(struct net_device *dev) 1861 { 1862 struct ehea_port *port = netdev_priv(dev); 1863 struct ehea_mc_list *mc_entry = port->mc_list; 1864 struct list_head *pos; 1865 struct list_head *temp; 1866 int ret = 0; 1867 u64 hret; 1868 1869 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1870 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1871 1872 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1873 H_DEREG_BCMC); 1874 if (hret) { 1875 pr_err("failed deregistering mcast MAC\n"); 1876 ret = -EIO; 1877 } 1878 1879 list_del(pos); 1880 kfree(mc_entry); 1881 } 1882 return ret; 1883 } 1884 1885 static void ehea_allmulti(struct net_device *dev, int enable) 1886 { 1887 struct ehea_port *port = netdev_priv(dev); 1888 u64 hret; 1889 1890 if (!port->allmulti) { 1891 if (enable) { 1892 /* Enable ALLMULTI */ 1893 ehea_drop_multicast_list(dev); 1894 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1895 if (!hret) 1896 port->allmulti = 1; 1897 else 1898 netdev_err(dev, 1899 "failed enabling IFF_ALLMULTI\n"); 1900 } 1901 } else 1902 if (!enable) { 1903 /* Disable ALLMULTI */ 1904 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1905 if (!hret) 1906 port->allmulti = 0; 1907 else 1908 netdev_err(dev, 1909 "failed disabling IFF_ALLMULTI\n"); 1910 } 1911 } 1912 1913 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1914 { 1915 struct ehea_mc_list *ehea_mcl_entry; 1916 u64 hret; 1917 1918 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1919 if (!ehea_mcl_entry) { 1920 pr_err("no mem for mcl_entry\n"); 1921 return; 1922 } 1923 1924 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1925 1926 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1927 1928 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1929 H_REG_BCMC); 1930 if (!hret) 1931 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1932 else { 1933 pr_err("failed registering mcast MAC\n"); 1934 kfree(ehea_mcl_entry); 1935 } 1936 } 1937 1938 static void ehea_set_multicast_list(struct net_device *dev) 1939 { 1940 struct ehea_port *port = netdev_priv(dev); 1941 struct netdev_hw_addr *ha; 1942 int ret; 1943 1944 if (port->promisc) { 1945 ehea_promiscuous(dev, 1); 1946 return; 1947 } 1948 ehea_promiscuous(dev, 0); 1949 1950 if (dev->flags & IFF_ALLMULTI) { 1951 ehea_allmulti(dev, 1); 1952 goto out; 1953 } 1954 ehea_allmulti(dev, 0); 1955 1956 if (!netdev_mc_empty(dev)) { 1957 ret = ehea_drop_multicast_list(dev); 1958 if (ret) { 1959 /* Dropping the current multicast list failed. 1960 * Enabling ALL_MULTI is the best we can do. 1961 */ 1962 ehea_allmulti(dev, 1); 1963 } 1964 1965 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1966 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1967 port->adapter->max_mc_mac); 1968 goto out; 1969 } 1970 1971 netdev_for_each_mc_addr(ha, dev) 1972 ehea_add_multicast_entry(port, ha->addr); 1973 1974 } 1975 out: 1976 ehea_update_bcmc_registrations(); 1977 } 1978 1979 static int ehea_change_mtu(struct net_device *dev, int new_mtu) 1980 { 1981 if ((new_mtu < 68) || (new_mtu > EHEA_MAX_PACKET_SIZE)) 1982 return -EINVAL; 1983 dev->mtu = new_mtu; 1984 return 0; 1985 } 1986 1987 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1988 { 1989 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1990 1991 if (skb->protocol != htons(ETH_P_IP)) 1992 return; 1993 1994 if (skb->ip_summed == CHECKSUM_PARTIAL) 1995 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 1996 1997 swqe->ip_start = skb_network_offset(skb); 1998 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 1999 2000 switch (ip_hdr(skb)->protocol) { 2001 case IPPROTO_UDP: 2002 if (skb->ip_summed == CHECKSUM_PARTIAL) 2003 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2004 2005 swqe->tcp_offset = swqe->ip_end + 1 + 2006 offsetof(struct udphdr, check); 2007 break; 2008 2009 case IPPROTO_TCP: 2010 if (skb->ip_summed == CHECKSUM_PARTIAL) 2011 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 2012 2013 swqe->tcp_offset = swqe->ip_end + 1 + 2014 offsetof(struct tcphdr, check); 2015 break; 2016 } 2017 } 2018 2019 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 2020 struct ehea_swqe *swqe, u32 lkey) 2021 { 2022 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 2023 2024 xmit_common(skb, swqe); 2025 2026 write_swqe2_data(skb, dev, swqe, lkey); 2027 } 2028 2029 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 2030 struct ehea_swqe *swqe) 2031 { 2032 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2033 2034 xmit_common(skb, swqe); 2035 2036 if (!skb->data_len) 2037 skb_copy_from_linear_data(skb, imm_data, skb->len); 2038 else 2039 skb_copy_bits(skb, 0, imm_data, skb->len); 2040 2041 swqe->immediate_data_length = skb->len; 2042 dev_kfree_skb(skb); 2043 } 2044 2045 static int ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2046 { 2047 struct ehea_port *port = netdev_priv(dev); 2048 struct ehea_swqe *swqe; 2049 u32 lkey; 2050 int swqe_index; 2051 struct ehea_port_res *pr; 2052 struct netdev_queue *txq; 2053 2054 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2055 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2056 2057 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2058 memset(swqe, 0, SWQE_HEADER_SIZE); 2059 atomic_dec(&pr->swqe_avail); 2060 2061 if (vlan_tx_tag_present(skb)) { 2062 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2063 swqe->vlan_tag = vlan_tx_tag_get(skb); 2064 } 2065 2066 pr->tx_packets++; 2067 pr->tx_bytes += skb->len; 2068 2069 if (skb->len <= SWQE3_MAX_IMM) { 2070 u32 sig_iv = port->sig_comp_iv; 2071 u32 swqe_num = pr->swqe_id_counter; 2072 ehea_xmit3(skb, dev, swqe); 2073 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2074 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2075 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2076 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2077 sig_iv); 2078 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2079 pr->swqe_ll_count = 0; 2080 } else 2081 pr->swqe_ll_count += 1; 2082 } else { 2083 swqe->wr_id = 2084 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2085 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2086 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2087 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2088 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2089 2090 pr->sq_skba.index++; 2091 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2092 2093 lkey = pr->send_mr.lkey; 2094 ehea_xmit2(skb, dev, swqe, lkey); 2095 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2096 } 2097 pr->swqe_id_counter += 1; 2098 2099 netif_info(port, tx_queued, dev, 2100 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2101 if (netif_msg_tx_queued(port)) 2102 ehea_dump(swqe, 512, "swqe"); 2103 2104 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2105 netif_tx_stop_queue(txq); 2106 swqe->tx_control |= EHEA_SWQE_PURGE; 2107 } 2108 2109 ehea_post_swqe(pr->qp, swqe); 2110 2111 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2112 pr->p_stats.queue_stopped++; 2113 netif_tx_stop_queue(txq); 2114 } 2115 2116 return NETDEV_TX_OK; 2117 } 2118 2119 static int ehea_vlan_rx_add_vid(struct net_device *dev, unsigned short vid) 2120 { 2121 struct ehea_port *port = netdev_priv(dev); 2122 struct ehea_adapter *adapter = port->adapter; 2123 struct hcp_ehea_port_cb1 *cb1; 2124 int index; 2125 u64 hret; 2126 int err = 0; 2127 2128 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2129 if (!cb1) { 2130 pr_err("no mem for cb1\n"); 2131 err = -ENOMEM; 2132 goto out; 2133 } 2134 2135 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2136 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2137 if (hret != H_SUCCESS) { 2138 pr_err("query_ehea_port failed\n"); 2139 err = -EINVAL; 2140 goto out; 2141 } 2142 2143 index = (vid / 64); 2144 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2145 2146 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2147 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2148 if (hret != H_SUCCESS) { 2149 pr_err("modify_ehea_port failed\n"); 2150 err = -EINVAL; 2151 } 2152 out: 2153 free_page((unsigned long)cb1); 2154 return err; 2155 } 2156 2157 static int ehea_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid) 2158 { 2159 struct ehea_port *port = netdev_priv(dev); 2160 struct ehea_adapter *adapter = port->adapter; 2161 struct hcp_ehea_port_cb1 *cb1; 2162 int index; 2163 u64 hret; 2164 int err = 0; 2165 2166 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2167 if (!cb1) { 2168 pr_err("no mem for cb1\n"); 2169 err = -ENOMEM; 2170 goto out; 2171 } 2172 2173 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2174 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2175 if (hret != H_SUCCESS) { 2176 pr_err("query_ehea_port failed\n"); 2177 err = -EINVAL; 2178 goto out; 2179 } 2180 2181 index = (vid / 64); 2182 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2183 2184 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2185 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2186 if (hret != H_SUCCESS) { 2187 pr_err("modify_ehea_port failed\n"); 2188 err = -EINVAL; 2189 } 2190 out: 2191 free_page((unsigned long)cb1); 2192 return err; 2193 } 2194 2195 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2196 { 2197 int ret = -EIO; 2198 u64 hret; 2199 u16 dummy16 = 0; 2200 u64 dummy64 = 0; 2201 struct hcp_modify_qp_cb0 *cb0; 2202 2203 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2204 if (!cb0) { 2205 ret = -ENOMEM; 2206 goto out; 2207 } 2208 2209 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2210 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2211 if (hret != H_SUCCESS) { 2212 pr_err("query_ehea_qp failed (1)\n"); 2213 goto out; 2214 } 2215 2216 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2217 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2218 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2219 &dummy64, &dummy64, &dummy16, &dummy16); 2220 if (hret != H_SUCCESS) { 2221 pr_err("modify_ehea_qp failed (1)\n"); 2222 goto out; 2223 } 2224 2225 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2226 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2227 if (hret != H_SUCCESS) { 2228 pr_err("query_ehea_qp failed (2)\n"); 2229 goto out; 2230 } 2231 2232 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2233 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2234 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2235 &dummy64, &dummy64, &dummy16, &dummy16); 2236 if (hret != H_SUCCESS) { 2237 pr_err("modify_ehea_qp failed (2)\n"); 2238 goto out; 2239 } 2240 2241 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2242 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2243 if (hret != H_SUCCESS) { 2244 pr_err("query_ehea_qp failed (3)\n"); 2245 goto out; 2246 } 2247 2248 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2249 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2250 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2251 &dummy64, &dummy64, &dummy16, &dummy16); 2252 if (hret != H_SUCCESS) { 2253 pr_err("modify_ehea_qp failed (3)\n"); 2254 goto out; 2255 } 2256 2257 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2258 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2259 if (hret != H_SUCCESS) { 2260 pr_err("query_ehea_qp failed (4)\n"); 2261 goto out; 2262 } 2263 2264 ret = 0; 2265 out: 2266 free_page((unsigned long)cb0); 2267 return ret; 2268 } 2269 2270 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2271 { 2272 int ret, i; 2273 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2274 enum ehea_eq_type eq_type = EHEA_EQ; 2275 2276 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2277 EHEA_MAX_ENTRIES_EQ, 1); 2278 if (!port->qp_eq) { 2279 ret = -EINVAL; 2280 pr_err("ehea_create_eq failed (qp_eq)\n"); 2281 goto out_kill_eq; 2282 } 2283 2284 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2285 pr_cfg.max_entries_scq = sq_entries * 2; 2286 pr_cfg.max_entries_sq = sq_entries; 2287 pr_cfg.max_entries_rq1 = rq1_entries; 2288 pr_cfg.max_entries_rq2 = rq2_entries; 2289 pr_cfg.max_entries_rq3 = rq3_entries; 2290 2291 pr_cfg_small_rx.max_entries_rcq = 1; 2292 pr_cfg_small_rx.max_entries_scq = sq_entries; 2293 pr_cfg_small_rx.max_entries_sq = sq_entries; 2294 pr_cfg_small_rx.max_entries_rq1 = 1; 2295 pr_cfg_small_rx.max_entries_rq2 = 1; 2296 pr_cfg_small_rx.max_entries_rq3 = 1; 2297 2298 for (i = 0; i < def_qps; i++) { 2299 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2300 if (ret) 2301 goto out_clean_pr; 2302 } 2303 for (i = def_qps; i < def_qps; i++) { 2304 ret = ehea_init_port_res(port, &port->port_res[i], 2305 &pr_cfg_small_rx, i); 2306 if (ret) 2307 goto out_clean_pr; 2308 } 2309 2310 return 0; 2311 2312 out_clean_pr: 2313 while (--i >= 0) 2314 ehea_clean_portres(port, &port->port_res[i]); 2315 2316 out_kill_eq: 2317 ehea_destroy_eq(port->qp_eq); 2318 return ret; 2319 } 2320 2321 static int ehea_clean_all_portres(struct ehea_port *port) 2322 { 2323 int ret = 0; 2324 int i; 2325 2326 for (i = 0; i < port->num_def_qps; i++) 2327 ret |= ehea_clean_portres(port, &port->port_res[i]); 2328 2329 ret |= ehea_destroy_eq(port->qp_eq); 2330 2331 return ret; 2332 } 2333 2334 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2335 { 2336 if (adapter->active_ports) 2337 return; 2338 2339 ehea_rem_mr(&adapter->mr); 2340 } 2341 2342 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2343 { 2344 if (adapter->active_ports) 2345 return 0; 2346 2347 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2348 } 2349 2350 static int ehea_up(struct net_device *dev) 2351 { 2352 int ret, i; 2353 struct ehea_port *port = netdev_priv(dev); 2354 2355 if (port->state == EHEA_PORT_UP) 2356 return 0; 2357 2358 ret = ehea_port_res_setup(port, port->num_def_qps); 2359 if (ret) { 2360 netdev_err(dev, "port_res_failed\n"); 2361 goto out; 2362 } 2363 2364 /* Set default QP for this port */ 2365 ret = ehea_configure_port(port); 2366 if (ret) { 2367 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2368 goto out_clean_pr; 2369 } 2370 2371 ret = ehea_reg_interrupts(dev); 2372 if (ret) { 2373 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2374 goto out_clean_pr; 2375 } 2376 2377 for (i = 0; i < port->num_def_qps; i++) { 2378 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2379 if (ret) { 2380 netdev_err(dev, "activate_qp failed\n"); 2381 goto out_free_irqs; 2382 } 2383 } 2384 2385 for (i = 0; i < port->num_def_qps; i++) { 2386 ret = ehea_fill_port_res(&port->port_res[i]); 2387 if (ret) { 2388 netdev_err(dev, "out_free_irqs\n"); 2389 goto out_free_irqs; 2390 } 2391 } 2392 2393 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2394 if (ret) { 2395 ret = -EIO; 2396 goto out_free_irqs; 2397 } 2398 2399 port->state = EHEA_PORT_UP; 2400 2401 ret = 0; 2402 goto out; 2403 2404 out_free_irqs: 2405 ehea_free_interrupts(dev); 2406 2407 out_clean_pr: 2408 ehea_clean_all_portres(port); 2409 out: 2410 if (ret) 2411 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2412 2413 ehea_update_bcmc_registrations(); 2414 ehea_update_firmware_handles(); 2415 2416 return ret; 2417 } 2418 2419 static void port_napi_disable(struct ehea_port *port) 2420 { 2421 int i; 2422 2423 for (i = 0; i < port->num_def_qps; i++) 2424 napi_disable(&port->port_res[i].napi); 2425 } 2426 2427 static void port_napi_enable(struct ehea_port *port) 2428 { 2429 int i; 2430 2431 for (i = 0; i < port->num_def_qps; i++) 2432 napi_enable(&port->port_res[i].napi); 2433 } 2434 2435 static int ehea_open(struct net_device *dev) 2436 { 2437 int ret; 2438 struct ehea_port *port = netdev_priv(dev); 2439 2440 mutex_lock(&port->port_lock); 2441 2442 netif_info(port, ifup, dev, "enabling port\n"); 2443 2444 ret = ehea_up(dev); 2445 if (!ret) { 2446 port_napi_enable(port); 2447 netif_tx_start_all_queues(dev); 2448 } 2449 2450 mutex_unlock(&port->port_lock); 2451 schedule_delayed_work(&port->stats_work, 2452 round_jiffies_relative(msecs_to_jiffies(1000))); 2453 2454 return ret; 2455 } 2456 2457 static int ehea_down(struct net_device *dev) 2458 { 2459 int ret; 2460 struct ehea_port *port = netdev_priv(dev); 2461 2462 if (port->state == EHEA_PORT_DOWN) 2463 return 0; 2464 2465 ehea_drop_multicast_list(dev); 2466 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2467 2468 ehea_free_interrupts(dev); 2469 2470 port->state = EHEA_PORT_DOWN; 2471 2472 ehea_update_bcmc_registrations(); 2473 2474 ret = ehea_clean_all_portres(port); 2475 if (ret) 2476 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2477 2478 ehea_update_firmware_handles(); 2479 2480 return ret; 2481 } 2482 2483 static int ehea_stop(struct net_device *dev) 2484 { 2485 int ret; 2486 struct ehea_port *port = netdev_priv(dev); 2487 2488 netif_info(port, ifdown, dev, "disabling port\n"); 2489 2490 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2491 cancel_work_sync(&port->reset_task); 2492 cancel_delayed_work_sync(&port->stats_work); 2493 mutex_lock(&port->port_lock); 2494 netif_tx_stop_all_queues(dev); 2495 port_napi_disable(port); 2496 ret = ehea_down(dev); 2497 mutex_unlock(&port->port_lock); 2498 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2499 return ret; 2500 } 2501 2502 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2503 { 2504 struct ehea_qp qp = *orig_qp; 2505 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2506 struct ehea_swqe *swqe; 2507 int wqe_index; 2508 int i; 2509 2510 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2511 swqe = ehea_get_swqe(&qp, &wqe_index); 2512 swqe->tx_control |= EHEA_SWQE_PURGE; 2513 } 2514 } 2515 2516 static void ehea_flush_sq(struct ehea_port *port) 2517 { 2518 int i; 2519 2520 for (i = 0; i < port->num_def_qps; i++) { 2521 struct ehea_port_res *pr = &port->port_res[i]; 2522 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2523 int ret; 2524 2525 ret = wait_event_timeout(port->swqe_avail_wq, 2526 atomic_read(&pr->swqe_avail) >= swqe_max, 2527 msecs_to_jiffies(100)); 2528 2529 if (!ret) { 2530 pr_err("WARNING: sq not flushed completely\n"); 2531 break; 2532 } 2533 } 2534 } 2535 2536 static int ehea_stop_qps(struct net_device *dev) 2537 { 2538 struct ehea_port *port = netdev_priv(dev); 2539 struct ehea_adapter *adapter = port->adapter; 2540 struct hcp_modify_qp_cb0 *cb0; 2541 int ret = -EIO; 2542 int dret; 2543 int i; 2544 u64 hret; 2545 u64 dummy64 = 0; 2546 u16 dummy16 = 0; 2547 2548 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2549 if (!cb0) { 2550 ret = -ENOMEM; 2551 goto out; 2552 } 2553 2554 for (i = 0; i < (port->num_def_qps); i++) { 2555 struct ehea_port_res *pr = &port->port_res[i]; 2556 struct ehea_qp *qp = pr->qp; 2557 2558 /* Purge send queue */ 2559 ehea_purge_sq(qp); 2560 2561 /* Disable queue pair */ 2562 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2563 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2564 cb0); 2565 if (hret != H_SUCCESS) { 2566 pr_err("query_ehea_qp failed (1)\n"); 2567 goto out; 2568 } 2569 2570 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2571 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2572 2573 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2574 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2575 1), cb0, &dummy64, 2576 &dummy64, &dummy16, &dummy16); 2577 if (hret != H_SUCCESS) { 2578 pr_err("modify_ehea_qp failed (1)\n"); 2579 goto out; 2580 } 2581 2582 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2583 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2584 cb0); 2585 if (hret != H_SUCCESS) { 2586 pr_err("query_ehea_qp failed (2)\n"); 2587 goto out; 2588 } 2589 2590 /* deregister shared memory regions */ 2591 dret = ehea_rem_smrs(pr); 2592 if (dret) { 2593 pr_err("unreg shared memory region failed\n"); 2594 goto out; 2595 } 2596 } 2597 2598 ret = 0; 2599 out: 2600 free_page((unsigned long)cb0); 2601 2602 return ret; 2603 } 2604 2605 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2606 { 2607 struct ehea_qp qp = *orig_qp; 2608 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2609 struct ehea_rwqe *rwqe; 2610 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2611 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2612 struct sk_buff *skb; 2613 u32 lkey = pr->recv_mr.lkey; 2614 2615 2616 int i; 2617 int index; 2618 2619 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2620 rwqe = ehea_get_next_rwqe(&qp, 2); 2621 rwqe->sg_list[0].l_key = lkey; 2622 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2623 skb = skba_rq2[index]; 2624 if (skb) 2625 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2626 } 2627 2628 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2629 rwqe = ehea_get_next_rwqe(&qp, 3); 2630 rwqe->sg_list[0].l_key = lkey; 2631 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2632 skb = skba_rq3[index]; 2633 if (skb) 2634 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2635 } 2636 } 2637 2638 static int ehea_restart_qps(struct net_device *dev) 2639 { 2640 struct ehea_port *port = netdev_priv(dev); 2641 struct ehea_adapter *adapter = port->adapter; 2642 int ret = 0; 2643 int i; 2644 2645 struct hcp_modify_qp_cb0 *cb0; 2646 u64 hret; 2647 u64 dummy64 = 0; 2648 u16 dummy16 = 0; 2649 2650 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2651 if (!cb0) { 2652 ret = -ENOMEM; 2653 goto out; 2654 } 2655 2656 for (i = 0; i < (port->num_def_qps); i++) { 2657 struct ehea_port_res *pr = &port->port_res[i]; 2658 struct ehea_qp *qp = pr->qp; 2659 2660 ret = ehea_gen_smrs(pr); 2661 if (ret) { 2662 netdev_err(dev, "creation of shared memory regions failed\n"); 2663 goto out; 2664 } 2665 2666 ehea_update_rqs(qp, pr); 2667 2668 /* Enable queue pair */ 2669 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2670 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2671 cb0); 2672 if (hret != H_SUCCESS) { 2673 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2674 goto out; 2675 } 2676 2677 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2678 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2679 2680 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2681 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2682 1), cb0, &dummy64, 2683 &dummy64, &dummy16, &dummy16); 2684 if (hret != H_SUCCESS) { 2685 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2686 goto out; 2687 } 2688 2689 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2690 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2691 cb0); 2692 if (hret != H_SUCCESS) { 2693 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2694 goto out; 2695 } 2696 2697 /* refill entire queue */ 2698 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2699 ehea_refill_rq2(pr, 0); 2700 ehea_refill_rq3(pr, 0); 2701 } 2702 out: 2703 free_page((unsigned long)cb0); 2704 2705 return ret; 2706 } 2707 2708 static void ehea_reset_port(struct work_struct *work) 2709 { 2710 int ret; 2711 struct ehea_port *port = 2712 container_of(work, struct ehea_port, reset_task); 2713 struct net_device *dev = port->netdev; 2714 2715 mutex_lock(&dlpar_mem_lock); 2716 port->resets++; 2717 mutex_lock(&port->port_lock); 2718 netif_tx_disable(dev); 2719 2720 port_napi_disable(port); 2721 2722 ehea_down(dev); 2723 2724 ret = ehea_up(dev); 2725 if (ret) 2726 goto out; 2727 2728 ehea_set_multicast_list(dev); 2729 2730 netif_info(port, timer, dev, "reset successful\n"); 2731 2732 port_napi_enable(port); 2733 2734 netif_tx_wake_all_queues(dev); 2735 out: 2736 mutex_unlock(&port->port_lock); 2737 mutex_unlock(&dlpar_mem_lock); 2738 } 2739 2740 static void ehea_rereg_mrs(void) 2741 { 2742 int ret, i; 2743 struct ehea_adapter *adapter; 2744 2745 pr_info("LPAR memory changed - re-initializing driver\n"); 2746 2747 list_for_each_entry(adapter, &adapter_list, list) 2748 if (adapter->active_ports) { 2749 /* Shutdown all ports */ 2750 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2751 struct ehea_port *port = adapter->port[i]; 2752 struct net_device *dev; 2753 2754 if (!port) 2755 continue; 2756 2757 dev = port->netdev; 2758 2759 if (dev->flags & IFF_UP) { 2760 mutex_lock(&port->port_lock); 2761 netif_tx_disable(dev); 2762 ehea_flush_sq(port); 2763 ret = ehea_stop_qps(dev); 2764 if (ret) { 2765 mutex_unlock(&port->port_lock); 2766 goto out; 2767 } 2768 port_napi_disable(port); 2769 mutex_unlock(&port->port_lock); 2770 } 2771 reset_sq_restart_flag(port); 2772 } 2773 2774 /* Unregister old memory region */ 2775 ret = ehea_rem_mr(&adapter->mr); 2776 if (ret) { 2777 pr_err("unregister MR failed - driver inoperable!\n"); 2778 goto out; 2779 } 2780 } 2781 2782 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2783 2784 list_for_each_entry(adapter, &adapter_list, list) 2785 if (adapter->active_ports) { 2786 /* Register new memory region */ 2787 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2788 if (ret) { 2789 pr_err("register MR failed - driver inoperable!\n"); 2790 goto out; 2791 } 2792 2793 /* Restart all ports */ 2794 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2795 struct ehea_port *port = adapter->port[i]; 2796 2797 if (port) { 2798 struct net_device *dev = port->netdev; 2799 2800 if (dev->flags & IFF_UP) { 2801 mutex_lock(&port->port_lock); 2802 ret = ehea_restart_qps(dev); 2803 if (!ret) { 2804 check_sqs(port); 2805 port_napi_enable(port); 2806 netif_tx_wake_all_queues(dev); 2807 } else { 2808 netdev_err(dev, "Unable to restart QPS\n"); 2809 } 2810 mutex_unlock(&port->port_lock); 2811 } 2812 } 2813 } 2814 } 2815 pr_info("re-initializing driver complete\n"); 2816 out: 2817 return; 2818 } 2819 2820 static void ehea_tx_watchdog(struct net_device *dev) 2821 { 2822 struct ehea_port *port = netdev_priv(dev); 2823 2824 if (netif_carrier_ok(dev) && 2825 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2826 ehea_schedule_port_reset(port); 2827 } 2828 2829 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2830 { 2831 struct hcp_query_ehea *cb; 2832 u64 hret; 2833 int ret; 2834 2835 cb = (void *)get_zeroed_page(GFP_KERNEL); 2836 if (!cb) { 2837 ret = -ENOMEM; 2838 goto out; 2839 } 2840 2841 hret = ehea_h_query_ehea(adapter->handle, cb); 2842 2843 if (hret != H_SUCCESS) { 2844 ret = -EIO; 2845 goto out_herr; 2846 } 2847 2848 adapter->max_mc_mac = cb->max_mc_mac - 1; 2849 ret = 0; 2850 2851 out_herr: 2852 free_page((unsigned long)cb); 2853 out: 2854 return ret; 2855 } 2856 2857 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2858 { 2859 struct hcp_ehea_port_cb4 *cb4; 2860 u64 hret; 2861 int ret = 0; 2862 2863 *jumbo = 0; 2864 2865 /* (Try to) enable *jumbo frames */ 2866 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2867 if (!cb4) { 2868 pr_err("no mem for cb4\n"); 2869 ret = -ENOMEM; 2870 goto out; 2871 } else { 2872 hret = ehea_h_query_ehea_port(port->adapter->handle, 2873 port->logical_port_id, 2874 H_PORT_CB4, 2875 H_PORT_CB4_JUMBO, cb4); 2876 if (hret == H_SUCCESS) { 2877 if (cb4->jumbo_frame) 2878 *jumbo = 1; 2879 else { 2880 cb4->jumbo_frame = 1; 2881 hret = ehea_h_modify_ehea_port(port->adapter-> 2882 handle, 2883 port-> 2884 logical_port_id, 2885 H_PORT_CB4, 2886 H_PORT_CB4_JUMBO, 2887 cb4); 2888 if (hret == H_SUCCESS) 2889 *jumbo = 1; 2890 } 2891 } else 2892 ret = -EINVAL; 2893 2894 free_page((unsigned long)cb4); 2895 } 2896 out: 2897 return ret; 2898 } 2899 2900 static ssize_t ehea_show_port_id(struct device *dev, 2901 struct device_attribute *attr, char *buf) 2902 { 2903 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2904 return sprintf(buf, "%d", port->logical_port_id); 2905 } 2906 2907 static DEVICE_ATTR(log_port_id, S_IRUSR | S_IRGRP | S_IROTH, ehea_show_port_id, 2908 NULL); 2909 2910 static void __devinit logical_port_release(struct device *dev) 2911 { 2912 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2913 of_node_put(port->ofdev.dev.of_node); 2914 } 2915 2916 static struct device *ehea_register_port(struct ehea_port *port, 2917 struct device_node *dn) 2918 { 2919 int ret; 2920 2921 port->ofdev.dev.of_node = of_node_get(dn); 2922 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2923 port->ofdev.dev.bus = &ibmebus_bus_type; 2924 2925 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2926 port->ofdev.dev.release = logical_port_release; 2927 2928 ret = of_device_register(&port->ofdev); 2929 if (ret) { 2930 pr_err("failed to register device. ret=%d\n", ret); 2931 goto out; 2932 } 2933 2934 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2935 if (ret) { 2936 pr_err("failed to register attributes, ret=%d\n", ret); 2937 goto out_unreg_of_dev; 2938 } 2939 2940 return &port->ofdev.dev; 2941 2942 out_unreg_of_dev: 2943 of_device_unregister(&port->ofdev); 2944 out: 2945 return NULL; 2946 } 2947 2948 static void ehea_unregister_port(struct ehea_port *port) 2949 { 2950 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2951 of_device_unregister(&port->ofdev); 2952 } 2953 2954 static const struct net_device_ops ehea_netdev_ops = { 2955 .ndo_open = ehea_open, 2956 .ndo_stop = ehea_stop, 2957 .ndo_start_xmit = ehea_start_xmit, 2958 #ifdef CONFIG_NET_POLL_CONTROLLER 2959 .ndo_poll_controller = ehea_netpoll, 2960 #endif 2961 .ndo_get_stats64 = ehea_get_stats64, 2962 .ndo_set_mac_address = ehea_set_mac_addr, 2963 .ndo_validate_addr = eth_validate_addr, 2964 .ndo_set_rx_mode = ehea_set_multicast_list, 2965 .ndo_change_mtu = ehea_change_mtu, 2966 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2967 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2968 .ndo_tx_timeout = ehea_tx_watchdog, 2969 }; 2970 2971 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2972 u32 logical_port_id, 2973 struct device_node *dn) 2974 { 2975 int ret; 2976 struct net_device *dev; 2977 struct ehea_port *port; 2978 struct device *port_dev; 2979 int jumbo; 2980 2981 /* allocate memory for the port structures */ 2982 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2983 2984 if (!dev) { 2985 ret = -ENOMEM; 2986 goto out_err; 2987 } 2988 2989 port = netdev_priv(dev); 2990 2991 mutex_init(&port->port_lock); 2992 port->state = EHEA_PORT_DOWN; 2993 port->sig_comp_iv = sq_entries / 10; 2994 2995 port->adapter = adapter; 2996 port->netdev = dev; 2997 port->logical_port_id = logical_port_id; 2998 2999 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 3000 3001 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 3002 if (!port->mc_list) { 3003 ret = -ENOMEM; 3004 goto out_free_ethdev; 3005 } 3006 3007 INIT_LIST_HEAD(&port->mc_list->list); 3008 3009 ret = ehea_sense_port_attr(port); 3010 if (ret) 3011 goto out_free_mc_list; 3012 3013 netif_set_real_num_rx_queues(dev, port->num_def_qps); 3014 netif_set_real_num_tx_queues(dev, port->num_def_qps); 3015 3016 port_dev = ehea_register_port(port, dn); 3017 if (!port_dev) 3018 goto out_free_mc_list; 3019 3020 SET_NETDEV_DEV(dev, port_dev); 3021 3022 /* initialize net_device structure */ 3023 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); 3024 3025 dev->netdev_ops = &ehea_netdev_ops; 3026 ehea_set_ethtool_ops(dev); 3027 3028 dev->hw_features = NETIF_F_SG | NETIF_F_TSO 3029 | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX | NETIF_F_LRO; 3030 dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_TSO 3031 | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_TX 3032 | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER 3033 | NETIF_F_RXCSUM; 3034 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3035 NETIF_F_IP_CSUM; 3036 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3037 3038 INIT_WORK(&port->reset_task, ehea_reset_port); 3039 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3040 3041 init_waitqueue_head(&port->swqe_avail_wq); 3042 init_waitqueue_head(&port->restart_wq); 3043 3044 memset(&port->stats, 0, sizeof(struct net_device_stats)); 3045 ret = register_netdev(dev); 3046 if (ret) { 3047 pr_err("register_netdev failed. ret=%d\n", ret); 3048 goto out_unreg_port; 3049 } 3050 3051 ret = ehea_get_jumboframe_status(port, &jumbo); 3052 if (ret) 3053 netdev_err(dev, "failed determining jumbo frame status\n"); 3054 3055 netdev_info(dev, "Jumbo frames are %sabled\n", 3056 jumbo == 1 ? "en" : "dis"); 3057 3058 adapter->active_ports++; 3059 3060 return port; 3061 3062 out_unreg_port: 3063 ehea_unregister_port(port); 3064 3065 out_free_mc_list: 3066 kfree(port->mc_list); 3067 3068 out_free_ethdev: 3069 free_netdev(dev); 3070 3071 out_err: 3072 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3073 logical_port_id, ret); 3074 return NULL; 3075 } 3076 3077 static void ehea_shutdown_single_port(struct ehea_port *port) 3078 { 3079 struct ehea_adapter *adapter = port->adapter; 3080 3081 cancel_work_sync(&port->reset_task); 3082 cancel_delayed_work_sync(&port->stats_work); 3083 unregister_netdev(port->netdev); 3084 ehea_unregister_port(port); 3085 kfree(port->mc_list); 3086 free_netdev(port->netdev); 3087 adapter->active_ports--; 3088 } 3089 3090 static int ehea_setup_ports(struct ehea_adapter *adapter) 3091 { 3092 struct device_node *lhea_dn; 3093 struct device_node *eth_dn = NULL; 3094 3095 const u32 *dn_log_port_id; 3096 int i = 0; 3097 3098 lhea_dn = adapter->ofdev->dev.of_node; 3099 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3100 3101 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3102 NULL); 3103 if (!dn_log_port_id) { 3104 pr_err("bad device node: eth_dn name=%s\n", 3105 eth_dn->full_name); 3106 continue; 3107 } 3108 3109 if (ehea_add_adapter_mr(adapter)) { 3110 pr_err("creating MR failed\n"); 3111 of_node_put(eth_dn); 3112 return -EIO; 3113 } 3114 3115 adapter->port[i] = ehea_setup_single_port(adapter, 3116 *dn_log_port_id, 3117 eth_dn); 3118 if (adapter->port[i]) 3119 netdev_info(adapter->port[i]->netdev, 3120 "logical port id #%d\n", *dn_log_port_id); 3121 else 3122 ehea_remove_adapter_mr(adapter); 3123 3124 i++; 3125 } 3126 return 0; 3127 } 3128 3129 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3130 u32 logical_port_id) 3131 { 3132 struct device_node *lhea_dn; 3133 struct device_node *eth_dn = NULL; 3134 const u32 *dn_log_port_id; 3135 3136 lhea_dn = adapter->ofdev->dev.of_node; 3137 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3138 3139 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3140 NULL); 3141 if (dn_log_port_id) 3142 if (*dn_log_port_id == logical_port_id) 3143 return eth_dn; 3144 } 3145 3146 return NULL; 3147 } 3148 3149 static ssize_t ehea_probe_port(struct device *dev, 3150 struct device_attribute *attr, 3151 const char *buf, size_t count) 3152 { 3153 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3154 struct ehea_port *port; 3155 struct device_node *eth_dn = NULL; 3156 int i; 3157 3158 u32 logical_port_id; 3159 3160 sscanf(buf, "%d", &logical_port_id); 3161 3162 port = ehea_get_port(adapter, logical_port_id); 3163 3164 if (port) { 3165 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3166 logical_port_id); 3167 return -EINVAL; 3168 } 3169 3170 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3171 3172 if (!eth_dn) { 3173 pr_info("no logical port with id %d found\n", logical_port_id); 3174 return -EINVAL; 3175 } 3176 3177 if (ehea_add_adapter_mr(adapter)) { 3178 pr_err("creating MR failed\n"); 3179 return -EIO; 3180 } 3181 3182 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3183 3184 of_node_put(eth_dn); 3185 3186 if (port) { 3187 for (i = 0; i < EHEA_MAX_PORTS; i++) 3188 if (!adapter->port[i]) { 3189 adapter->port[i] = port; 3190 break; 3191 } 3192 3193 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3194 logical_port_id); 3195 } else { 3196 ehea_remove_adapter_mr(adapter); 3197 return -EIO; 3198 } 3199 3200 return (ssize_t) count; 3201 } 3202 3203 static ssize_t ehea_remove_port(struct device *dev, 3204 struct device_attribute *attr, 3205 const char *buf, size_t count) 3206 { 3207 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3208 struct ehea_port *port; 3209 int i; 3210 u32 logical_port_id; 3211 3212 sscanf(buf, "%d", &logical_port_id); 3213 3214 port = ehea_get_port(adapter, logical_port_id); 3215 3216 if (port) { 3217 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3218 logical_port_id); 3219 3220 ehea_shutdown_single_port(port); 3221 3222 for (i = 0; i < EHEA_MAX_PORTS; i++) 3223 if (adapter->port[i] == port) { 3224 adapter->port[i] = NULL; 3225 break; 3226 } 3227 } else { 3228 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3229 logical_port_id); 3230 return -EINVAL; 3231 } 3232 3233 ehea_remove_adapter_mr(adapter); 3234 3235 return (ssize_t) count; 3236 } 3237 3238 static DEVICE_ATTR(probe_port, S_IWUSR, NULL, ehea_probe_port); 3239 static DEVICE_ATTR(remove_port, S_IWUSR, NULL, ehea_remove_port); 3240 3241 static int ehea_create_device_sysfs(struct platform_device *dev) 3242 { 3243 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3244 if (ret) 3245 goto out; 3246 3247 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3248 out: 3249 return ret; 3250 } 3251 3252 static void ehea_remove_device_sysfs(struct platform_device *dev) 3253 { 3254 device_remove_file(&dev->dev, &dev_attr_probe_port); 3255 device_remove_file(&dev->dev, &dev_attr_remove_port); 3256 } 3257 3258 static int __devinit ehea_probe_adapter(struct platform_device *dev, 3259 const struct of_device_id *id) 3260 { 3261 struct ehea_adapter *adapter; 3262 const u64 *adapter_handle; 3263 int ret; 3264 3265 if (!dev || !dev->dev.of_node) { 3266 pr_err("Invalid ibmebus device probed\n"); 3267 return -EINVAL; 3268 } 3269 3270 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL); 3271 if (!adapter) { 3272 ret = -ENOMEM; 3273 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3274 goto out; 3275 } 3276 3277 list_add(&adapter->list, &adapter_list); 3278 3279 adapter->ofdev = dev; 3280 3281 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3282 NULL); 3283 if (adapter_handle) 3284 adapter->handle = *adapter_handle; 3285 3286 if (!adapter->handle) { 3287 dev_err(&dev->dev, "failed getting handle for adapter" 3288 " '%s'\n", dev->dev.of_node->full_name); 3289 ret = -ENODEV; 3290 goto out_free_ad; 3291 } 3292 3293 adapter->pd = EHEA_PD_ID; 3294 3295 dev_set_drvdata(&dev->dev, adapter); 3296 3297 3298 /* initialize adapter and ports */ 3299 /* get adapter properties */ 3300 ret = ehea_sense_adapter_attr(adapter); 3301 if (ret) { 3302 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3303 goto out_free_ad; 3304 } 3305 3306 adapter->neq = ehea_create_eq(adapter, 3307 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3308 if (!adapter->neq) { 3309 ret = -EIO; 3310 dev_err(&dev->dev, "NEQ creation failed\n"); 3311 goto out_free_ad; 3312 } 3313 3314 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, 3315 (unsigned long)adapter); 3316 3317 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3318 ehea_interrupt_neq, IRQF_DISABLED, 3319 "ehea_neq", adapter); 3320 if (ret) { 3321 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3322 goto out_kill_eq; 3323 } 3324 3325 ret = ehea_create_device_sysfs(dev); 3326 if (ret) 3327 goto out_free_irq; 3328 3329 ret = ehea_setup_ports(adapter); 3330 if (ret) { 3331 dev_err(&dev->dev, "setup_ports failed\n"); 3332 goto out_rem_dev_sysfs; 3333 } 3334 3335 ret = 0; 3336 goto out; 3337 3338 out_rem_dev_sysfs: 3339 ehea_remove_device_sysfs(dev); 3340 3341 out_free_irq: 3342 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3343 3344 out_kill_eq: 3345 ehea_destroy_eq(adapter->neq); 3346 3347 out_free_ad: 3348 list_del(&adapter->list); 3349 kfree(adapter); 3350 3351 out: 3352 ehea_update_firmware_handles(); 3353 3354 return ret; 3355 } 3356 3357 static int __devexit ehea_remove(struct platform_device *dev) 3358 { 3359 struct ehea_adapter *adapter = dev_get_drvdata(&dev->dev); 3360 int i; 3361 3362 for (i = 0; i < EHEA_MAX_PORTS; i++) 3363 if (adapter->port[i]) { 3364 ehea_shutdown_single_port(adapter->port[i]); 3365 adapter->port[i] = NULL; 3366 } 3367 3368 ehea_remove_device_sysfs(dev); 3369 3370 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3371 tasklet_kill(&adapter->neq_tasklet); 3372 3373 ehea_destroy_eq(adapter->neq); 3374 ehea_remove_adapter_mr(adapter); 3375 list_del(&adapter->list); 3376 kfree(adapter); 3377 3378 ehea_update_firmware_handles(); 3379 3380 return 0; 3381 } 3382 3383 static void ehea_crash_handler(void) 3384 { 3385 int i; 3386 3387 if (ehea_fw_handles.arr) 3388 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3389 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3390 ehea_fw_handles.arr[i].fwh, 3391 FORCE_FREE); 3392 3393 if (ehea_bcmc_regs.arr) 3394 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3395 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3396 ehea_bcmc_regs.arr[i].port_id, 3397 ehea_bcmc_regs.arr[i].reg_type, 3398 ehea_bcmc_regs.arr[i].macaddr, 3399 0, H_DEREG_BCMC); 3400 } 3401 3402 static int ehea_mem_notifier(struct notifier_block *nb, 3403 unsigned long action, void *data) 3404 { 3405 int ret = NOTIFY_BAD; 3406 struct memory_notify *arg = data; 3407 3408 mutex_lock(&dlpar_mem_lock); 3409 3410 switch (action) { 3411 case MEM_CANCEL_OFFLINE: 3412 pr_info("memory offlining canceled"); 3413 /* Readd canceled memory block */ 3414 case MEM_ONLINE: 3415 pr_info("memory is going online"); 3416 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3417 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3418 goto out_unlock; 3419 ehea_rereg_mrs(); 3420 break; 3421 case MEM_GOING_OFFLINE: 3422 pr_info("memory is going offline"); 3423 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3424 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3425 goto out_unlock; 3426 ehea_rereg_mrs(); 3427 break; 3428 default: 3429 break; 3430 } 3431 3432 ehea_update_firmware_handles(); 3433 ret = NOTIFY_OK; 3434 3435 out_unlock: 3436 mutex_unlock(&dlpar_mem_lock); 3437 return ret; 3438 } 3439 3440 static struct notifier_block ehea_mem_nb = { 3441 .notifier_call = ehea_mem_notifier, 3442 }; 3443 3444 static int ehea_reboot_notifier(struct notifier_block *nb, 3445 unsigned long action, void *unused) 3446 { 3447 if (action == SYS_RESTART) { 3448 pr_info("Reboot: freeing all eHEA resources\n"); 3449 ibmebus_unregister_driver(&ehea_driver); 3450 } 3451 return NOTIFY_DONE; 3452 } 3453 3454 static struct notifier_block ehea_reboot_nb = { 3455 .notifier_call = ehea_reboot_notifier, 3456 }; 3457 3458 static int check_module_parm(void) 3459 { 3460 int ret = 0; 3461 3462 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3463 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3464 pr_info("Bad parameter: rq1_entries\n"); 3465 ret = -EINVAL; 3466 } 3467 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3468 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3469 pr_info("Bad parameter: rq2_entries\n"); 3470 ret = -EINVAL; 3471 } 3472 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3473 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3474 pr_info("Bad parameter: rq3_entries\n"); 3475 ret = -EINVAL; 3476 } 3477 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3478 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3479 pr_info("Bad parameter: sq_entries\n"); 3480 ret = -EINVAL; 3481 } 3482 3483 return ret; 3484 } 3485 3486 static ssize_t ehea_show_capabilities(struct device_driver *drv, 3487 char *buf) 3488 { 3489 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3490 } 3491 3492 static DRIVER_ATTR(capabilities, S_IRUSR | S_IRGRP | S_IROTH, 3493 ehea_show_capabilities, NULL); 3494 3495 static int __init ehea_module_init(void) 3496 { 3497 int ret; 3498 3499 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3500 3501 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3502 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3503 3504 mutex_init(&ehea_fw_handles.lock); 3505 spin_lock_init(&ehea_bcmc_regs.lock); 3506 3507 ret = check_module_parm(); 3508 if (ret) 3509 goto out; 3510 3511 ret = ehea_create_busmap(); 3512 if (ret) 3513 goto out; 3514 3515 ret = register_reboot_notifier(&ehea_reboot_nb); 3516 if (ret) 3517 pr_info("failed registering reboot notifier\n"); 3518 3519 ret = register_memory_notifier(&ehea_mem_nb); 3520 if (ret) 3521 pr_info("failed registering memory remove notifier\n"); 3522 3523 ret = crash_shutdown_register(ehea_crash_handler); 3524 if (ret) 3525 pr_info("failed registering crash handler\n"); 3526 3527 ret = ibmebus_register_driver(&ehea_driver); 3528 if (ret) { 3529 pr_err("failed registering eHEA device driver on ebus\n"); 3530 goto out2; 3531 } 3532 3533 ret = driver_create_file(&ehea_driver.driver, 3534 &driver_attr_capabilities); 3535 if (ret) { 3536 pr_err("failed to register capabilities attribute, ret=%d\n", 3537 ret); 3538 goto out3; 3539 } 3540 3541 return ret; 3542 3543 out3: 3544 ibmebus_unregister_driver(&ehea_driver); 3545 out2: 3546 unregister_memory_notifier(&ehea_mem_nb); 3547 unregister_reboot_notifier(&ehea_reboot_nb); 3548 crash_shutdown_unregister(ehea_crash_handler); 3549 out: 3550 return ret; 3551 } 3552 3553 static void __exit ehea_module_exit(void) 3554 { 3555 int ret; 3556 3557 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3558 ibmebus_unregister_driver(&ehea_driver); 3559 unregister_reboot_notifier(&ehea_reboot_nb); 3560 ret = crash_shutdown_unregister(ehea_crash_handler); 3561 if (ret) 3562 pr_info("failed unregistering crash handler\n"); 3563 unregister_memory_notifier(&ehea_mem_nb); 3564 kfree(ehea_fw_handles.arr); 3565 kfree(ehea_bcmc_regs.arr); 3566 ehea_destroy_busmap(); 3567 } 3568 3569 module_init(ehea_module_init); 3570 module_exit(ehea_module_exit); 3571