1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * linux/drivers/net/ethernet/ibm/ehea/ehea_main.c 4 * 5 * eHEA ethernet device driver for IBM eServer System p 6 * 7 * (C) Copyright IBM Corp. 2006 8 * 9 * Authors: 10 * Christoph Raisch <raisch@de.ibm.com> 11 * Jan-Bernd Themann <themann@de.ibm.com> 12 * Thomas Klein <tklein@de.ibm.com> 13 */ 14 15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 16 17 #include <linux/device.h> 18 #include <linux/in.h> 19 #include <linux/ip.h> 20 #include <linux/tcp.h> 21 #include <linux/udp.h> 22 #include <linux/if.h> 23 #include <linux/list.h> 24 #include <linux/slab.h> 25 #include <linux/if_ether.h> 26 #include <linux/notifier.h> 27 #include <linux/reboot.h> 28 #include <linux/memory.h> 29 #include <asm/kexec.h> 30 #include <linux/mutex.h> 31 #include <linux/prefetch.h> 32 #include <linux/of.h> 33 #include <linux/of_device.h> 34 #include <linux/platform_device.h> 35 36 #include <net/ip.h> 37 38 #include "ehea.h" 39 #include "ehea_qmr.h" 40 #include "ehea_phyp.h" 41 42 43 MODULE_LICENSE("GPL"); 44 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>"); 45 MODULE_DESCRIPTION("IBM eServer HEA Driver"); 46 MODULE_VERSION(DRV_VERSION); 47 48 49 static int msg_level = -1; 50 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1; 51 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2; 52 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3; 53 static int sq_entries = EHEA_DEF_ENTRIES_SQ; 54 static int use_mcs = 1; 55 static int prop_carrier_state; 56 57 module_param(msg_level, int, 0); 58 module_param(rq1_entries, int, 0); 59 module_param(rq2_entries, int, 0); 60 module_param(rq3_entries, int, 0); 61 module_param(sq_entries, int, 0); 62 module_param(prop_carrier_state, int, 0); 63 module_param(use_mcs, int, 0); 64 65 MODULE_PARM_DESC(msg_level, "msg_level"); 66 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical " 67 "port to stack. 1:yes, 0:no. Default = 0 "); 68 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 " 69 "[2^x - 1], x = [7..14]. Default = " 70 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")"); 71 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 " 72 "[2^x - 1], x = [7..14]. Default = " 73 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")"); 74 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 " 75 "[2^x - 1], x = [7..14]. Default = " 76 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")"); 77 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue " 78 "[2^x - 1], x = [7..14]. Default = " 79 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); 80 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, " 81 "Default = 1"); 82 83 static int port_name_cnt; 84 static LIST_HEAD(adapter_list); 85 static unsigned long ehea_driver_flags; 86 static DEFINE_MUTEX(dlpar_mem_lock); 87 static struct ehea_fw_handle_array ehea_fw_handles; 88 static struct ehea_bcmc_reg_array ehea_bcmc_regs; 89 90 91 static int ehea_probe_adapter(struct platform_device *dev); 92 93 static void ehea_remove(struct platform_device *dev); 94 95 static const struct of_device_id ehea_module_device_table[] = { 96 { 97 .name = "lhea", 98 .compatible = "IBM,lhea", 99 }, 100 { 101 .type = "network", 102 .compatible = "IBM,lhea-ethernet", 103 }, 104 {}, 105 }; 106 MODULE_DEVICE_TABLE(of, ehea_module_device_table); 107 108 static const struct of_device_id ehea_device_table[] = { 109 { 110 .name = "lhea", 111 .compatible = "IBM,lhea", 112 }, 113 {}, 114 }; 115 MODULE_DEVICE_TABLE(of, ehea_device_table); 116 117 static struct platform_driver ehea_driver = { 118 .driver = { 119 .name = "ehea", 120 .owner = THIS_MODULE, 121 .of_match_table = ehea_device_table, 122 }, 123 .probe = ehea_probe_adapter, 124 .remove_new = ehea_remove, 125 }; 126 127 void ehea_dump(void *adr, int len, char *msg) 128 { 129 int x; 130 unsigned char *deb = adr; 131 for (x = 0; x < len; x += 16) { 132 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n", 133 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8])); 134 deb += 16; 135 } 136 } 137 138 static void ehea_schedule_port_reset(struct ehea_port *port) 139 { 140 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags)) 141 schedule_work(&port->reset_task); 142 } 143 144 static void ehea_update_firmware_handles(void) 145 { 146 struct ehea_fw_handle_entry *arr = NULL; 147 struct ehea_adapter *adapter; 148 int num_adapters = 0; 149 int num_ports = 0; 150 int num_portres = 0; 151 int i = 0; 152 int num_fw_handles, k, l; 153 154 /* Determine number of handles */ 155 mutex_lock(&ehea_fw_handles.lock); 156 157 list_for_each_entry(adapter, &adapter_list, list) { 158 num_adapters++; 159 160 for (k = 0; k < EHEA_MAX_PORTS; k++) { 161 struct ehea_port *port = adapter->port[k]; 162 163 if (!port || (port->state != EHEA_PORT_UP)) 164 continue; 165 166 num_ports++; 167 num_portres += port->num_def_qps; 168 } 169 } 170 171 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES + 172 num_ports * EHEA_NUM_PORT_FW_HANDLES + 173 num_portres * EHEA_NUM_PORTRES_FW_HANDLES; 174 175 if (num_fw_handles) { 176 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL); 177 if (!arr) 178 goto out; /* Keep the existing array */ 179 } else 180 goto out_update; 181 182 list_for_each_entry(adapter, &adapter_list, list) { 183 if (num_adapters == 0) 184 break; 185 186 for (k = 0; k < EHEA_MAX_PORTS; k++) { 187 struct ehea_port *port = adapter->port[k]; 188 189 if (!port || (port->state != EHEA_PORT_UP) || 190 (num_ports == 0)) 191 continue; 192 193 for (l = 0; l < port->num_def_qps; l++) { 194 struct ehea_port_res *pr = &port->port_res[l]; 195 196 arr[i].adh = adapter->handle; 197 arr[i++].fwh = pr->qp->fw_handle; 198 arr[i].adh = adapter->handle; 199 arr[i++].fwh = pr->send_cq->fw_handle; 200 arr[i].adh = adapter->handle; 201 arr[i++].fwh = pr->recv_cq->fw_handle; 202 arr[i].adh = adapter->handle; 203 arr[i++].fwh = pr->eq->fw_handle; 204 arr[i].adh = adapter->handle; 205 arr[i++].fwh = pr->send_mr.handle; 206 arr[i].adh = adapter->handle; 207 arr[i++].fwh = pr->recv_mr.handle; 208 } 209 arr[i].adh = adapter->handle; 210 arr[i++].fwh = port->qp_eq->fw_handle; 211 num_ports--; 212 } 213 214 arr[i].adh = adapter->handle; 215 arr[i++].fwh = adapter->neq->fw_handle; 216 217 if (adapter->mr.handle) { 218 arr[i].adh = adapter->handle; 219 arr[i++].fwh = adapter->mr.handle; 220 } 221 num_adapters--; 222 } 223 224 out_update: 225 kfree(ehea_fw_handles.arr); 226 ehea_fw_handles.arr = arr; 227 ehea_fw_handles.num_entries = i; 228 out: 229 mutex_unlock(&ehea_fw_handles.lock); 230 } 231 232 static void ehea_update_bcmc_registrations(void) 233 { 234 unsigned long flags; 235 struct ehea_bcmc_reg_entry *arr = NULL; 236 struct ehea_adapter *adapter; 237 struct ehea_mc_list *mc_entry; 238 int num_registrations = 0; 239 int i = 0; 240 int k; 241 242 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags); 243 244 /* Determine number of registrations */ 245 list_for_each_entry(adapter, &adapter_list, list) 246 for (k = 0; k < EHEA_MAX_PORTS; k++) { 247 struct ehea_port *port = adapter->port[k]; 248 249 if (!port || (port->state != EHEA_PORT_UP)) 250 continue; 251 252 num_registrations += 2; /* Broadcast registrations */ 253 254 list_for_each_entry(mc_entry, &port->mc_list->list,list) 255 num_registrations += 2; 256 } 257 258 if (num_registrations) { 259 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC); 260 if (!arr) 261 goto out; /* Keep the existing array */ 262 } else 263 goto out_update; 264 265 list_for_each_entry(adapter, &adapter_list, list) { 266 for (k = 0; k < EHEA_MAX_PORTS; k++) { 267 struct ehea_port *port = adapter->port[k]; 268 269 if (!port || (port->state != EHEA_PORT_UP)) 270 continue; 271 272 if (num_registrations == 0) 273 goto out_update; 274 275 arr[i].adh = adapter->handle; 276 arr[i].port_id = port->logical_port_id; 277 arr[i].reg_type = EHEA_BCMC_BROADCAST | 278 EHEA_BCMC_UNTAGGED; 279 arr[i++].macaddr = port->mac_addr; 280 281 arr[i].adh = adapter->handle; 282 arr[i].port_id = port->logical_port_id; 283 arr[i].reg_type = EHEA_BCMC_BROADCAST | 284 EHEA_BCMC_VLANID_ALL; 285 arr[i++].macaddr = port->mac_addr; 286 num_registrations -= 2; 287 288 list_for_each_entry(mc_entry, 289 &port->mc_list->list, list) { 290 if (num_registrations == 0) 291 goto out_update; 292 293 arr[i].adh = adapter->handle; 294 arr[i].port_id = port->logical_port_id; 295 arr[i].reg_type = EHEA_BCMC_MULTICAST | 296 EHEA_BCMC_UNTAGGED; 297 if (mc_entry->macaddr == 0) 298 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 299 arr[i++].macaddr = mc_entry->macaddr; 300 301 arr[i].adh = adapter->handle; 302 arr[i].port_id = port->logical_port_id; 303 arr[i].reg_type = EHEA_BCMC_MULTICAST | 304 EHEA_BCMC_VLANID_ALL; 305 if (mc_entry->macaddr == 0) 306 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 307 arr[i++].macaddr = mc_entry->macaddr; 308 num_registrations -= 2; 309 } 310 } 311 } 312 313 out_update: 314 kfree(ehea_bcmc_regs.arr); 315 ehea_bcmc_regs.arr = arr; 316 ehea_bcmc_regs.num_entries = i; 317 out: 318 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags); 319 } 320 321 static void ehea_get_stats64(struct net_device *dev, 322 struct rtnl_link_stats64 *stats) 323 { 324 struct ehea_port *port = netdev_priv(dev); 325 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0; 326 int i; 327 328 for (i = 0; i < port->num_def_qps; i++) { 329 rx_packets += port->port_res[i].rx_packets; 330 rx_bytes += port->port_res[i].rx_bytes; 331 } 332 333 for (i = 0; i < port->num_def_qps; i++) { 334 tx_packets += port->port_res[i].tx_packets; 335 tx_bytes += port->port_res[i].tx_bytes; 336 } 337 338 stats->tx_packets = tx_packets; 339 stats->rx_bytes = rx_bytes; 340 stats->tx_bytes = tx_bytes; 341 stats->rx_packets = rx_packets; 342 343 stats->multicast = port->stats.multicast; 344 stats->rx_errors = port->stats.rx_errors; 345 } 346 347 static void ehea_update_stats(struct work_struct *work) 348 { 349 struct ehea_port *port = 350 container_of(work, struct ehea_port, stats_work.work); 351 struct net_device *dev = port->netdev; 352 struct rtnl_link_stats64 *stats = &port->stats; 353 struct hcp_ehea_port_cb2 *cb2; 354 u64 hret; 355 356 cb2 = (void *)get_zeroed_page(GFP_KERNEL); 357 if (!cb2) { 358 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n"); 359 goto resched; 360 } 361 362 hret = ehea_h_query_ehea_port(port->adapter->handle, 363 port->logical_port_id, 364 H_PORT_CB2, H_PORT_CB2_ALL, cb2); 365 if (hret != H_SUCCESS) { 366 netdev_err(dev, "query_ehea_port failed\n"); 367 goto out_herr; 368 } 369 370 if (netif_msg_hw(port)) 371 ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); 372 373 stats->multicast = cb2->rxmcp; 374 stats->rx_errors = cb2->rxuerr; 375 376 out_herr: 377 free_page((unsigned long)cb2); 378 resched: 379 schedule_delayed_work(&port->stats_work, 380 round_jiffies_relative(msecs_to_jiffies(1000))); 381 } 382 383 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) 384 { 385 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 386 struct net_device *dev = pr->port->netdev; 387 int max_index_mask = pr->rq1_skba.len - 1; 388 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; 389 int adder = 0; 390 int i; 391 392 pr->rq1_skba.os_skbs = 0; 393 394 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 395 if (nr_of_wqes > 0) 396 pr->rq1_skba.index = index; 397 pr->rq1_skba.os_skbs = fill_wqes; 398 return; 399 } 400 401 for (i = 0; i < fill_wqes; i++) { 402 if (!skb_arr_rq1[index]) { 403 skb_arr_rq1[index] = netdev_alloc_skb(dev, 404 EHEA_L_PKT_SIZE); 405 if (!skb_arr_rq1[index]) { 406 pr->rq1_skba.os_skbs = fill_wqes - i; 407 break; 408 } 409 } 410 index--; 411 index &= max_index_mask; 412 adder++; 413 } 414 415 if (adder == 0) 416 return; 417 418 /* Ring doorbell */ 419 ehea_update_rq1a(pr->qp, adder); 420 } 421 422 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) 423 { 424 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 425 struct net_device *dev = pr->port->netdev; 426 int i; 427 428 if (nr_rq1a > pr->rq1_skba.len) { 429 netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); 430 return; 431 } 432 433 for (i = 0; i < nr_rq1a; i++) { 434 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); 435 if (!skb_arr_rq1[i]) 436 break; 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_consume_skb_any(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 break; 698 } 699 skb_copy_to_linear_data(skb, ((char *)cqe) + 64, 700 cqe->num_bytes_transfered - 4); 701 ehea_fill_skb(dev, skb, cqe, pr); 702 } else if (rq == 2) { 703 /* RQ2 */ 704 skb = get_skb_by_index(skb_arr_rq2, 705 skb_arr_rq2_len, cqe); 706 if (unlikely(!skb)) { 707 netif_err(port, rx_err, dev, 708 "rq2: skb=NULL\n"); 709 break; 710 } 711 ehea_fill_skb(dev, skb, cqe, pr); 712 processed_rq2++; 713 } else { 714 /* RQ3 */ 715 skb = get_skb_by_index(skb_arr_rq3, 716 skb_arr_rq3_len, cqe); 717 if (unlikely(!skb)) { 718 netif_err(port, rx_err, dev, 719 "rq3: skb=NULL\n"); 720 break; 721 } 722 ehea_fill_skb(dev, skb, cqe, pr); 723 processed_rq3++; 724 } 725 726 processed_bytes += skb->len; 727 728 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 729 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 730 cqe->vlan_tag); 731 732 napi_gro_receive(&pr->napi, skb); 733 } else { 734 pr->p_stats.poll_receive_errors++; 735 port_reset = ehea_treat_poll_error(pr, rq, cqe, 736 &processed_rq2, 737 &processed_rq3); 738 if (port_reset) 739 break; 740 } 741 cqe = ehea_poll_rq1(qp, &wqe_index); 742 } 743 744 pr->rx_packets += processed; 745 pr->rx_bytes += processed_bytes; 746 747 ehea_refill_rq1(pr, last_wqe_index, processed_rq1); 748 ehea_refill_rq2(pr, processed_rq2); 749 ehea_refill_rq3(pr, processed_rq3); 750 751 return processed; 752 } 753 754 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull 755 756 static void reset_sq_restart_flag(struct ehea_port *port) 757 { 758 int i; 759 760 for (i = 0; i < port->num_def_qps; i++) { 761 struct ehea_port_res *pr = &port->port_res[i]; 762 pr->sq_restart_flag = 0; 763 } 764 wake_up(&port->restart_wq); 765 } 766 767 static void check_sqs(struct ehea_port *port) 768 { 769 struct ehea_swqe *swqe; 770 int swqe_index; 771 int i; 772 773 for (i = 0; i < port->num_def_qps; i++) { 774 struct ehea_port_res *pr = &port->port_res[i]; 775 int ret; 776 swqe = ehea_get_swqe(pr->qp, &swqe_index); 777 memset(swqe, 0, SWQE_HEADER_SIZE); 778 atomic_dec(&pr->swqe_avail); 779 780 swqe->tx_control |= EHEA_SWQE_PURGE; 781 swqe->wr_id = SWQE_RESTART_CHECK; 782 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 783 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; 784 swqe->immediate_data_length = 80; 785 786 ehea_post_swqe(pr->qp, swqe); 787 788 ret = wait_event_timeout(port->restart_wq, 789 pr->sq_restart_flag == 0, 790 msecs_to_jiffies(100)); 791 792 if (!ret) { 793 pr_err("HW/SW queues out of sync\n"); 794 ehea_schedule_port_reset(pr->port); 795 return; 796 } 797 } 798 } 799 800 801 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) 802 { 803 struct sk_buff *skb; 804 struct ehea_cq *send_cq = pr->send_cq; 805 struct ehea_cqe *cqe; 806 int quota = my_quota; 807 int cqe_counter = 0; 808 int swqe_av = 0; 809 int index; 810 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, 811 pr - &pr->port->port_res[0]); 812 813 cqe = ehea_poll_cq(send_cq); 814 while (cqe && (quota > 0)) { 815 ehea_inc_cq(send_cq); 816 817 cqe_counter++; 818 rmb(); 819 820 if (cqe->wr_id == SWQE_RESTART_CHECK) { 821 pr->sq_restart_flag = 1; 822 swqe_av++; 823 break; 824 } 825 826 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { 827 pr_err("Bad send completion status=0x%04X\n", 828 cqe->status); 829 830 if (netif_msg_tx_err(pr->port)) 831 ehea_dump(cqe, sizeof(*cqe), "Send CQE"); 832 833 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { 834 pr_err("Resetting port\n"); 835 ehea_schedule_port_reset(pr->port); 836 break; 837 } 838 } 839 840 if (netif_msg_tx_done(pr->port)) 841 ehea_dump(cqe, sizeof(*cqe), "CQE"); 842 843 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) 844 == EHEA_SWQE2_TYPE)) { 845 846 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 847 skb = pr->sq_skba.arr[index]; 848 dev_consume_skb_any(skb); 849 pr->sq_skba.arr[index] = NULL; 850 } 851 852 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); 853 quota--; 854 855 cqe = ehea_poll_cq(send_cq); 856 } 857 858 ehea_update_feca(send_cq, cqe_counter); 859 atomic_add(swqe_av, &pr->swqe_avail); 860 861 if (unlikely(netif_tx_queue_stopped(txq) && 862 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { 863 __netif_tx_lock(txq, smp_processor_id()); 864 if (netif_tx_queue_stopped(txq) && 865 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) 866 netif_tx_wake_queue(txq); 867 __netif_tx_unlock(txq); 868 } 869 870 wake_up(&pr->port->swqe_avail_wq); 871 872 return cqe; 873 } 874 875 #define EHEA_POLL_MAX_CQES 65535 876 877 static int ehea_poll(struct napi_struct *napi, int budget) 878 { 879 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, 880 napi); 881 struct net_device *dev = pr->port->netdev; 882 struct ehea_cqe *cqe; 883 struct ehea_cqe *cqe_skb = NULL; 884 int wqe_index; 885 int rx = 0; 886 887 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 888 rx += ehea_proc_rwqes(dev, pr, budget - rx); 889 890 while (rx != budget) { 891 napi_complete(napi); 892 ehea_reset_cq_ep(pr->recv_cq); 893 ehea_reset_cq_ep(pr->send_cq); 894 ehea_reset_cq_n1(pr->recv_cq); 895 ehea_reset_cq_n1(pr->send_cq); 896 rmb(); 897 cqe = ehea_poll_rq1(pr->qp, &wqe_index); 898 cqe_skb = ehea_poll_cq(pr->send_cq); 899 900 if (!cqe && !cqe_skb) 901 return rx; 902 903 if (!napi_schedule(napi)) 904 return rx; 905 906 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 907 rx += ehea_proc_rwqes(dev, pr, budget - rx); 908 } 909 910 return rx; 911 } 912 913 static irqreturn_t ehea_recv_irq_handler(int irq, void *param) 914 { 915 struct ehea_port_res *pr = param; 916 917 napi_schedule(&pr->napi); 918 919 return IRQ_HANDLED; 920 } 921 922 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) 923 { 924 struct ehea_port *port = param; 925 struct ehea_eqe *eqe; 926 struct ehea_qp *qp; 927 u32 qp_token; 928 u64 resource_type, aer, aerr; 929 int reset_port = 0; 930 931 eqe = ehea_poll_eq(port->qp_eq); 932 933 while (eqe) { 934 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); 935 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", 936 eqe->entry, qp_token); 937 938 qp = port->port_res[qp_token].qp; 939 940 resource_type = ehea_error_data(port->adapter, qp->fw_handle, 941 &aer, &aerr); 942 943 if (resource_type == EHEA_AER_RESTYPE_QP) { 944 if ((aer & EHEA_AER_RESET_MASK) || 945 (aerr & EHEA_AERR_RESET_MASK)) 946 reset_port = 1; 947 } else 948 reset_port = 1; /* Reset in case of CQ or EQ error */ 949 950 eqe = ehea_poll_eq(port->qp_eq); 951 } 952 953 if (reset_port) { 954 pr_err("Resetting port\n"); 955 ehea_schedule_port_reset(port); 956 } 957 958 return IRQ_HANDLED; 959 } 960 961 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, 962 int logical_port) 963 { 964 int i; 965 966 for (i = 0; i < EHEA_MAX_PORTS; i++) 967 if (adapter->port[i]) 968 if (adapter->port[i]->logical_port_id == logical_port) 969 return adapter->port[i]; 970 return NULL; 971 } 972 973 int ehea_sense_port_attr(struct ehea_port *port) 974 { 975 int ret; 976 u64 hret; 977 struct hcp_ehea_port_cb0 *cb0; 978 979 /* may be called via ehea_neq_tasklet() */ 980 cb0 = (void *)get_zeroed_page(GFP_ATOMIC); 981 if (!cb0) { 982 pr_err("no mem for cb0\n"); 983 ret = -ENOMEM; 984 goto out; 985 } 986 987 hret = ehea_h_query_ehea_port(port->adapter->handle, 988 port->logical_port_id, H_PORT_CB0, 989 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), 990 cb0); 991 if (hret != H_SUCCESS) { 992 ret = -EIO; 993 goto out_free; 994 } 995 996 /* MAC address */ 997 port->mac_addr = cb0->port_mac_addr << 16; 998 999 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { 1000 ret = -EADDRNOTAVAIL; 1001 goto out_free; 1002 } 1003 1004 /* Port speed */ 1005 switch (cb0->port_speed) { 1006 case H_SPEED_10M_H: 1007 port->port_speed = EHEA_SPEED_10M; 1008 port->full_duplex = 0; 1009 break; 1010 case H_SPEED_10M_F: 1011 port->port_speed = EHEA_SPEED_10M; 1012 port->full_duplex = 1; 1013 break; 1014 case H_SPEED_100M_H: 1015 port->port_speed = EHEA_SPEED_100M; 1016 port->full_duplex = 0; 1017 break; 1018 case H_SPEED_100M_F: 1019 port->port_speed = EHEA_SPEED_100M; 1020 port->full_duplex = 1; 1021 break; 1022 case H_SPEED_1G_F: 1023 port->port_speed = EHEA_SPEED_1G; 1024 port->full_duplex = 1; 1025 break; 1026 case H_SPEED_10G_F: 1027 port->port_speed = EHEA_SPEED_10G; 1028 port->full_duplex = 1; 1029 break; 1030 default: 1031 port->port_speed = 0; 1032 port->full_duplex = 0; 1033 break; 1034 } 1035 1036 port->autoneg = 1; 1037 port->num_mcs = cb0->num_default_qps; 1038 1039 /* Number of default QPs */ 1040 if (use_mcs) 1041 port->num_def_qps = cb0->num_default_qps; 1042 else 1043 port->num_def_qps = 1; 1044 1045 if (!port->num_def_qps) { 1046 ret = -EINVAL; 1047 goto out_free; 1048 } 1049 1050 ret = 0; 1051 out_free: 1052 if (ret || netif_msg_probe(port)) 1053 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); 1054 free_page((unsigned long)cb0); 1055 out: 1056 return ret; 1057 } 1058 1059 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) 1060 { 1061 struct hcp_ehea_port_cb4 *cb4; 1062 u64 hret; 1063 int ret = 0; 1064 1065 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 1066 if (!cb4) { 1067 pr_err("no mem for cb4\n"); 1068 ret = -ENOMEM; 1069 goto out; 1070 } 1071 1072 cb4->port_speed = port_speed; 1073 1074 netif_carrier_off(port->netdev); 1075 1076 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1077 port->logical_port_id, 1078 H_PORT_CB4, H_PORT_CB4_SPEED, cb4); 1079 if (hret == H_SUCCESS) { 1080 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; 1081 1082 hret = ehea_h_query_ehea_port(port->adapter->handle, 1083 port->logical_port_id, 1084 H_PORT_CB4, H_PORT_CB4_SPEED, 1085 cb4); 1086 if (hret == H_SUCCESS) { 1087 switch (cb4->port_speed) { 1088 case H_SPEED_10M_H: 1089 port->port_speed = EHEA_SPEED_10M; 1090 port->full_duplex = 0; 1091 break; 1092 case H_SPEED_10M_F: 1093 port->port_speed = EHEA_SPEED_10M; 1094 port->full_duplex = 1; 1095 break; 1096 case H_SPEED_100M_H: 1097 port->port_speed = EHEA_SPEED_100M; 1098 port->full_duplex = 0; 1099 break; 1100 case H_SPEED_100M_F: 1101 port->port_speed = EHEA_SPEED_100M; 1102 port->full_duplex = 1; 1103 break; 1104 case H_SPEED_1G_F: 1105 port->port_speed = EHEA_SPEED_1G; 1106 port->full_duplex = 1; 1107 break; 1108 case H_SPEED_10G_F: 1109 port->port_speed = EHEA_SPEED_10G; 1110 port->full_duplex = 1; 1111 break; 1112 default: 1113 port->port_speed = 0; 1114 port->full_duplex = 0; 1115 break; 1116 } 1117 } else { 1118 pr_err("Failed sensing port speed\n"); 1119 ret = -EIO; 1120 } 1121 } else { 1122 if (hret == H_AUTHORITY) { 1123 pr_info("Hypervisor denied setting port speed\n"); 1124 ret = -EPERM; 1125 } else { 1126 ret = -EIO; 1127 pr_err("Failed setting port speed\n"); 1128 } 1129 } 1130 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) 1131 netif_carrier_on(port->netdev); 1132 1133 free_page((unsigned long)cb4); 1134 out: 1135 return ret; 1136 } 1137 1138 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) 1139 { 1140 int ret; 1141 u8 ec; 1142 u8 portnum; 1143 struct ehea_port *port; 1144 struct net_device *dev; 1145 1146 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); 1147 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); 1148 port = ehea_get_port(adapter, portnum); 1149 if (!port) { 1150 netdev_err(NULL, "unknown portnum %x\n", portnum); 1151 return; 1152 } 1153 dev = port->netdev; 1154 1155 switch (ec) { 1156 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1157 1158 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1159 if (!netif_carrier_ok(dev)) { 1160 ret = ehea_sense_port_attr(port); 1161 if (ret) { 1162 netdev_err(dev, "failed resensing port attributes\n"); 1163 break; 1164 } 1165 1166 netif_info(port, link, dev, 1167 "Logical port up: %dMbps %s Duplex\n", 1168 port->port_speed, 1169 port->full_duplex == 1 ? 1170 "Full" : "Half"); 1171 1172 netif_carrier_on(dev); 1173 netif_wake_queue(dev); 1174 } 1175 } else 1176 if (netif_carrier_ok(dev)) { 1177 netif_info(port, link, dev, 1178 "Logical port down\n"); 1179 netif_carrier_off(dev); 1180 netif_tx_disable(dev); 1181 } 1182 1183 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1184 port->phy_link = EHEA_PHY_LINK_UP; 1185 netif_info(port, link, dev, 1186 "Physical port up\n"); 1187 if (prop_carrier_state) 1188 netif_carrier_on(dev); 1189 } else { 1190 port->phy_link = EHEA_PHY_LINK_DOWN; 1191 netif_info(port, link, dev, 1192 "Physical port down\n"); 1193 if (prop_carrier_state) 1194 netif_carrier_off(dev); 1195 } 1196 1197 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1198 netdev_info(dev, 1199 "External switch port is primary port\n"); 1200 else 1201 netdev_info(dev, 1202 "External switch port is backup port\n"); 1203 1204 break; 1205 case EHEA_EC_ADAPTER_MALFUNC: 1206 netdev_err(dev, "Adapter malfunction\n"); 1207 break; 1208 case EHEA_EC_PORT_MALFUNC: 1209 netdev_info(dev, "Port malfunction\n"); 1210 netif_carrier_off(dev); 1211 netif_tx_disable(dev); 1212 break; 1213 default: 1214 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1215 break; 1216 } 1217 } 1218 1219 static void ehea_neq_tasklet(struct tasklet_struct *t) 1220 { 1221 struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet); 1222 struct ehea_eqe *eqe; 1223 u64 event_mask; 1224 1225 eqe = ehea_poll_eq(adapter->neq); 1226 pr_debug("eqe=%p\n", eqe); 1227 1228 while (eqe) { 1229 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1230 ehea_parse_eqe(adapter, eqe->entry); 1231 eqe = ehea_poll_eq(adapter->neq); 1232 pr_debug("next eqe=%p\n", eqe); 1233 } 1234 1235 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1236 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1237 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1238 1239 ehea_h_reset_events(adapter->handle, 1240 adapter->neq->fw_handle, event_mask); 1241 } 1242 1243 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1244 { 1245 struct ehea_adapter *adapter = param; 1246 tasklet_hi_schedule(&adapter->neq_tasklet); 1247 return IRQ_HANDLED; 1248 } 1249 1250 1251 static int ehea_fill_port_res(struct ehea_port_res *pr) 1252 { 1253 int ret; 1254 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1255 1256 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1257 1258 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1259 1260 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1261 1262 return ret; 1263 } 1264 1265 static int ehea_reg_interrupts(struct net_device *dev) 1266 { 1267 struct ehea_port *port = netdev_priv(dev); 1268 struct ehea_port_res *pr; 1269 int i, ret; 1270 1271 1272 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1273 dev->name); 1274 1275 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1276 ehea_qp_aff_irq_handler, 1277 0, port->int_aff_name, port); 1278 if (ret) { 1279 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1280 port->qp_eq->attr.ist1); 1281 goto out_free_qpeq; 1282 } 1283 1284 netif_info(port, ifup, dev, 1285 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1286 port->qp_eq->attr.ist1); 1287 1288 1289 for (i = 0; i < port->num_def_qps; i++) { 1290 pr = &port->port_res[i]; 1291 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1292 "%s-queue%d", dev->name, i); 1293 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1294 ehea_recv_irq_handler, 1295 0, pr->int_send_name, pr); 1296 if (ret) { 1297 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1298 i, pr->eq->attr.ist1); 1299 goto out_free_req; 1300 } 1301 netif_info(port, ifup, dev, 1302 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1303 pr->eq->attr.ist1, i); 1304 } 1305 out: 1306 return ret; 1307 1308 1309 out_free_req: 1310 while (--i >= 0) { 1311 u32 ist = port->port_res[i].eq->attr.ist1; 1312 ibmebus_free_irq(ist, &port->port_res[i]); 1313 } 1314 1315 out_free_qpeq: 1316 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1317 i = port->num_def_qps; 1318 1319 goto out; 1320 1321 } 1322 1323 static void ehea_free_interrupts(struct net_device *dev) 1324 { 1325 struct ehea_port *port = netdev_priv(dev); 1326 struct ehea_port_res *pr; 1327 int i; 1328 1329 /* send */ 1330 1331 for (i = 0; i < port->num_def_qps; i++) { 1332 pr = &port->port_res[i]; 1333 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1334 netif_info(port, intr, dev, 1335 "free send irq for res %d with handle 0x%X\n", 1336 i, pr->eq->attr.ist1); 1337 } 1338 1339 /* associated events */ 1340 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1341 netif_info(port, intr, dev, 1342 "associated event interrupt for handle 0x%X freed\n", 1343 port->qp_eq->attr.ist1); 1344 } 1345 1346 static int ehea_configure_port(struct ehea_port *port) 1347 { 1348 int ret, i; 1349 u64 hret, mask; 1350 struct hcp_ehea_port_cb0 *cb0; 1351 1352 ret = -ENOMEM; 1353 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1354 if (!cb0) 1355 goto out; 1356 1357 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1358 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1359 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1360 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1361 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1362 PXLY_RC_VLAN_FILTER) 1363 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1364 1365 for (i = 0; i < port->num_mcs; i++) 1366 if (use_mcs) 1367 cb0->default_qpn_arr[i] = 1368 port->port_res[i].qp->init_attr.qp_nr; 1369 else 1370 cb0->default_qpn_arr[i] = 1371 port->port_res[0].qp->init_attr.qp_nr; 1372 1373 if (netif_msg_ifup(port)) 1374 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1375 1376 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1377 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1378 1379 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1380 port->logical_port_id, 1381 H_PORT_CB0, mask, cb0); 1382 ret = -EIO; 1383 if (hret != H_SUCCESS) 1384 goto out_free; 1385 1386 ret = 0; 1387 1388 out_free: 1389 free_page((unsigned long)cb0); 1390 out: 1391 return ret; 1392 } 1393 1394 static int ehea_gen_smrs(struct ehea_port_res *pr) 1395 { 1396 int ret; 1397 struct ehea_adapter *adapter = pr->port->adapter; 1398 1399 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1400 if (ret) 1401 goto out; 1402 1403 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1404 if (ret) 1405 goto out_free; 1406 1407 return 0; 1408 1409 out_free: 1410 ehea_rem_mr(&pr->send_mr); 1411 out: 1412 pr_err("Generating SMRS failed\n"); 1413 return -EIO; 1414 } 1415 1416 static int ehea_rem_smrs(struct ehea_port_res *pr) 1417 { 1418 if ((ehea_rem_mr(&pr->send_mr)) || 1419 (ehea_rem_mr(&pr->recv_mr))) 1420 return -EIO; 1421 else 1422 return 0; 1423 } 1424 1425 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1426 { 1427 int arr_size = sizeof(void *) * max_q_entries; 1428 1429 q_skba->arr = vzalloc(arr_size); 1430 if (!q_skba->arr) 1431 return -ENOMEM; 1432 1433 q_skba->len = max_q_entries; 1434 q_skba->index = 0; 1435 q_skba->os_skbs = 0; 1436 1437 return 0; 1438 } 1439 1440 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1441 struct port_res_cfg *pr_cfg, int queue_token) 1442 { 1443 struct ehea_adapter *adapter = port->adapter; 1444 enum ehea_eq_type eq_type = EHEA_EQ; 1445 struct ehea_qp_init_attr *init_attr = NULL; 1446 int ret = -EIO; 1447 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1448 1449 tx_bytes = pr->tx_bytes; 1450 tx_packets = pr->tx_packets; 1451 rx_bytes = pr->rx_bytes; 1452 rx_packets = pr->rx_packets; 1453 1454 memset(pr, 0, sizeof(struct ehea_port_res)); 1455 1456 pr->tx_bytes = tx_bytes; 1457 pr->tx_packets = tx_packets; 1458 pr->rx_bytes = rx_bytes; 1459 pr->rx_packets = rx_packets; 1460 1461 pr->port = port; 1462 1463 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1464 if (!pr->eq) { 1465 pr_err("create_eq failed (eq)\n"); 1466 goto out_free; 1467 } 1468 1469 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1470 pr->eq->fw_handle, 1471 port->logical_port_id); 1472 if (!pr->recv_cq) { 1473 pr_err("create_cq failed (cq_recv)\n"); 1474 goto out_free; 1475 } 1476 1477 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1478 pr->eq->fw_handle, 1479 port->logical_port_id); 1480 if (!pr->send_cq) { 1481 pr_err("create_cq failed (cq_send)\n"); 1482 goto out_free; 1483 } 1484 1485 if (netif_msg_ifup(port)) 1486 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1487 pr->send_cq->attr.act_nr_of_cqes, 1488 pr->recv_cq->attr.act_nr_of_cqes); 1489 1490 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1491 if (!init_attr) { 1492 ret = -ENOMEM; 1493 pr_err("no mem for ehea_qp_init_attr\n"); 1494 goto out_free; 1495 } 1496 1497 init_attr->low_lat_rq1 = 1; 1498 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1499 init_attr->rq_count = 3; 1500 init_attr->qp_token = queue_token; 1501 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1502 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1503 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1504 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1505 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1506 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1507 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1508 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1509 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1510 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1511 init_attr->port_nr = port->logical_port_id; 1512 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1513 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1514 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1515 1516 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1517 if (!pr->qp) { 1518 pr_err("create_qp failed\n"); 1519 ret = -EIO; 1520 goto out_free; 1521 } 1522 1523 if (netif_msg_ifup(port)) 1524 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", 1525 init_attr->qp_nr, 1526 init_attr->act_nr_send_wqes, 1527 init_attr->act_nr_rwqes_rq1, 1528 init_attr->act_nr_rwqes_rq2, 1529 init_attr->act_nr_rwqes_rq3); 1530 1531 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1532 1533 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1534 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1535 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1536 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1537 if (ret) 1538 goto out_free; 1539 1540 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1541 if (ehea_gen_smrs(pr) != 0) { 1542 ret = -EIO; 1543 goto out_free; 1544 } 1545 1546 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1547 1548 kfree(init_attr); 1549 1550 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll); 1551 1552 ret = 0; 1553 goto out; 1554 1555 out_free: 1556 kfree(init_attr); 1557 vfree(pr->sq_skba.arr); 1558 vfree(pr->rq1_skba.arr); 1559 vfree(pr->rq2_skba.arr); 1560 vfree(pr->rq3_skba.arr); 1561 ehea_destroy_qp(pr->qp); 1562 ehea_destroy_cq(pr->send_cq); 1563 ehea_destroy_cq(pr->recv_cq); 1564 ehea_destroy_eq(pr->eq); 1565 out: 1566 return ret; 1567 } 1568 1569 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1570 { 1571 int ret, i; 1572 1573 if (pr->qp) 1574 netif_napi_del(&pr->napi); 1575 1576 ret = ehea_destroy_qp(pr->qp); 1577 1578 if (!ret) { 1579 ehea_destroy_cq(pr->send_cq); 1580 ehea_destroy_cq(pr->recv_cq); 1581 ehea_destroy_eq(pr->eq); 1582 1583 for (i = 0; i < pr->rq1_skba.len; i++) 1584 dev_kfree_skb(pr->rq1_skba.arr[i]); 1585 1586 for (i = 0; i < pr->rq2_skba.len; i++) 1587 dev_kfree_skb(pr->rq2_skba.arr[i]); 1588 1589 for (i = 0; i < pr->rq3_skba.len; i++) 1590 dev_kfree_skb(pr->rq3_skba.arr[i]); 1591 1592 for (i = 0; i < pr->sq_skba.len; i++) 1593 dev_kfree_skb(pr->sq_skba.arr[i]); 1594 1595 vfree(pr->rq1_skba.arr); 1596 vfree(pr->rq2_skba.arr); 1597 vfree(pr->rq3_skba.arr); 1598 vfree(pr->sq_skba.arr); 1599 ret = ehea_rem_smrs(pr); 1600 } 1601 return ret; 1602 } 1603 1604 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1605 u32 lkey) 1606 { 1607 int skb_data_size = skb_headlen(skb); 1608 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1609 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1610 unsigned int immediate_len = SWQE2_MAX_IMM; 1611 1612 swqe->descriptors = 0; 1613 1614 if (skb_is_gso(skb)) { 1615 swqe->tx_control |= EHEA_SWQE_TSO; 1616 swqe->mss = skb_shinfo(skb)->gso_size; 1617 /* 1618 * For TSO packets we only copy the headers into the 1619 * immediate area. 1620 */ 1621 immediate_len = skb_tcp_all_headers(skb); 1622 } 1623 1624 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1625 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1626 swqe->immediate_data_length = immediate_len; 1627 1628 if (skb_data_size > immediate_len) { 1629 sg1entry->l_key = lkey; 1630 sg1entry->len = skb_data_size - immediate_len; 1631 sg1entry->vaddr = 1632 ehea_map_vaddr(skb->data + immediate_len); 1633 swqe->descriptors++; 1634 } 1635 } else { 1636 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1637 swqe->immediate_data_length = skb_data_size; 1638 } 1639 } 1640 1641 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1642 struct ehea_swqe *swqe, u32 lkey) 1643 { 1644 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1645 skb_frag_t *frag; 1646 int nfrags, sg1entry_contains_frag_data, i; 1647 1648 nfrags = skb_shinfo(skb)->nr_frags; 1649 sg1entry = &swqe->u.immdata_desc.sg_entry; 1650 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1651 sg1entry_contains_frag_data = 0; 1652 1653 write_swqe2_immediate(skb, swqe, lkey); 1654 1655 /* write descriptors */ 1656 if (nfrags > 0) { 1657 if (swqe->descriptors == 0) { 1658 /* sg1entry not yet used */ 1659 frag = &skb_shinfo(skb)->frags[0]; 1660 1661 /* copy sg1entry data */ 1662 sg1entry->l_key = lkey; 1663 sg1entry->len = skb_frag_size(frag); 1664 sg1entry->vaddr = 1665 ehea_map_vaddr(skb_frag_address(frag)); 1666 swqe->descriptors++; 1667 sg1entry_contains_frag_data = 1; 1668 } 1669 1670 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1671 1672 frag = &skb_shinfo(skb)->frags[i]; 1673 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1674 1675 sgentry->l_key = lkey; 1676 sgentry->len = skb_frag_size(frag); 1677 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1678 swqe->descriptors++; 1679 } 1680 } 1681 } 1682 1683 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1684 { 1685 int ret = 0; 1686 u64 hret; 1687 u8 reg_type; 1688 1689 /* De/Register untagged packets */ 1690 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1691 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1692 port->logical_port_id, 1693 reg_type, port->mac_addr, 0, hcallid); 1694 if (hret != H_SUCCESS) { 1695 pr_err("%sregistering bc address failed (tagged)\n", 1696 hcallid == H_REG_BCMC ? "" : "de"); 1697 ret = -EIO; 1698 goto out_herr; 1699 } 1700 1701 /* De/Register VLAN packets */ 1702 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1703 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1704 port->logical_port_id, 1705 reg_type, port->mac_addr, 0, hcallid); 1706 if (hret != H_SUCCESS) { 1707 pr_err("%sregistering bc address failed (vlan)\n", 1708 hcallid == H_REG_BCMC ? "" : "de"); 1709 ret = -EIO; 1710 } 1711 out_herr: 1712 return ret; 1713 } 1714 1715 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1716 { 1717 struct ehea_port *port = netdev_priv(dev); 1718 struct sockaddr *mac_addr = sa; 1719 struct hcp_ehea_port_cb0 *cb0; 1720 int ret; 1721 u64 hret; 1722 1723 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1724 ret = -EADDRNOTAVAIL; 1725 goto out; 1726 } 1727 1728 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1729 if (!cb0) { 1730 pr_err("no mem for cb0\n"); 1731 ret = -ENOMEM; 1732 goto out; 1733 } 1734 1735 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1736 1737 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1738 1739 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1740 port->logical_port_id, H_PORT_CB0, 1741 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1742 if (hret != H_SUCCESS) { 1743 ret = -EIO; 1744 goto out_free; 1745 } 1746 1747 eth_hw_addr_set(dev, mac_addr->sa_data); 1748 1749 /* Deregister old MAC in pHYP */ 1750 if (port->state == EHEA_PORT_UP) { 1751 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1752 if (ret) 1753 goto out_upregs; 1754 } 1755 1756 port->mac_addr = cb0->port_mac_addr << 16; 1757 1758 /* Register new MAC in pHYP */ 1759 if (port->state == EHEA_PORT_UP) { 1760 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1761 if (ret) 1762 goto out_upregs; 1763 } 1764 1765 ret = 0; 1766 1767 out_upregs: 1768 ehea_update_bcmc_registrations(); 1769 out_free: 1770 free_page((unsigned long)cb0); 1771 out: 1772 return ret; 1773 } 1774 1775 static void ehea_promiscuous_error(u64 hret, int enable) 1776 { 1777 if (hret == H_AUTHORITY) 1778 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1779 enable == 1 ? "en" : "dis"); 1780 else 1781 pr_err("failed %sabling promiscuous mode\n", 1782 enable == 1 ? "en" : "dis"); 1783 } 1784 1785 static void ehea_promiscuous(struct net_device *dev, int enable) 1786 { 1787 struct ehea_port *port = netdev_priv(dev); 1788 struct hcp_ehea_port_cb7 *cb7; 1789 u64 hret; 1790 1791 if (enable == port->promisc) 1792 return; 1793 1794 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1795 if (!cb7) { 1796 pr_err("no mem for cb7\n"); 1797 goto out; 1798 } 1799 1800 /* Modify Pxs_DUCQPN in CB7 */ 1801 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1802 1803 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1804 port->logical_port_id, 1805 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1806 if (hret) { 1807 ehea_promiscuous_error(hret, enable); 1808 goto out; 1809 } 1810 1811 port->promisc = enable; 1812 out: 1813 free_page((unsigned long)cb7); 1814 } 1815 1816 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1817 u32 hcallid) 1818 { 1819 u64 hret; 1820 u8 reg_type; 1821 1822 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; 1823 if (mc_mac_addr == 0) 1824 reg_type |= EHEA_BCMC_SCOPE_ALL; 1825 1826 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1827 port->logical_port_id, 1828 reg_type, mc_mac_addr, 0, hcallid); 1829 if (hret) 1830 goto out; 1831 1832 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL; 1833 if (mc_mac_addr == 0) 1834 reg_type |= EHEA_BCMC_SCOPE_ALL; 1835 1836 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1837 port->logical_port_id, 1838 reg_type, mc_mac_addr, 0, hcallid); 1839 out: 1840 return hret; 1841 } 1842 1843 static int ehea_drop_multicast_list(struct net_device *dev) 1844 { 1845 struct ehea_port *port = netdev_priv(dev); 1846 struct ehea_mc_list *mc_entry = port->mc_list; 1847 struct list_head *pos; 1848 struct list_head *temp; 1849 int ret = 0; 1850 u64 hret; 1851 1852 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1853 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1854 1855 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1856 H_DEREG_BCMC); 1857 if (hret) { 1858 pr_err("failed deregistering mcast MAC\n"); 1859 ret = -EIO; 1860 } 1861 1862 list_del(pos); 1863 kfree(mc_entry); 1864 } 1865 return ret; 1866 } 1867 1868 static void ehea_allmulti(struct net_device *dev, int enable) 1869 { 1870 struct ehea_port *port = netdev_priv(dev); 1871 u64 hret; 1872 1873 if (!port->allmulti) { 1874 if (enable) { 1875 /* Enable ALLMULTI */ 1876 ehea_drop_multicast_list(dev); 1877 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1878 if (!hret) 1879 port->allmulti = 1; 1880 else 1881 netdev_err(dev, 1882 "failed enabling IFF_ALLMULTI\n"); 1883 } 1884 } else { 1885 if (!enable) { 1886 /* Disable ALLMULTI */ 1887 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1888 if (!hret) 1889 port->allmulti = 0; 1890 else 1891 netdev_err(dev, 1892 "failed disabling IFF_ALLMULTI\n"); 1893 } 1894 } 1895 } 1896 1897 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1898 { 1899 struct ehea_mc_list *ehea_mcl_entry; 1900 u64 hret; 1901 1902 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1903 if (!ehea_mcl_entry) 1904 return; 1905 1906 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1907 1908 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1909 1910 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1911 H_REG_BCMC); 1912 if (!hret) 1913 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1914 else { 1915 pr_err("failed registering mcast MAC\n"); 1916 kfree(ehea_mcl_entry); 1917 } 1918 } 1919 1920 static void ehea_set_multicast_list(struct net_device *dev) 1921 { 1922 struct ehea_port *port = netdev_priv(dev); 1923 struct netdev_hw_addr *ha; 1924 int ret; 1925 1926 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC)); 1927 1928 if (dev->flags & IFF_ALLMULTI) { 1929 ehea_allmulti(dev, 1); 1930 goto out; 1931 } 1932 ehea_allmulti(dev, 0); 1933 1934 if (!netdev_mc_empty(dev)) { 1935 ret = ehea_drop_multicast_list(dev); 1936 if (ret) { 1937 /* Dropping the current multicast list failed. 1938 * Enabling ALL_MULTI is the best we can do. 1939 */ 1940 ehea_allmulti(dev, 1); 1941 } 1942 1943 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1944 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1945 port->adapter->max_mc_mac); 1946 goto out; 1947 } 1948 1949 netdev_for_each_mc_addr(ha, dev) 1950 ehea_add_multicast_entry(port, ha->addr); 1951 1952 } 1953 out: 1954 ehea_update_bcmc_registrations(); 1955 } 1956 1957 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1958 { 1959 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1960 1961 if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 1962 return; 1963 1964 if (skb->ip_summed == CHECKSUM_PARTIAL) 1965 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 1966 1967 swqe->ip_start = skb_network_offset(skb); 1968 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 1969 1970 switch (ip_hdr(skb)->protocol) { 1971 case IPPROTO_UDP: 1972 if (skb->ip_summed == CHECKSUM_PARTIAL) 1973 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1974 1975 swqe->tcp_offset = swqe->ip_end + 1 + 1976 offsetof(struct udphdr, check); 1977 break; 1978 1979 case IPPROTO_TCP: 1980 if (skb->ip_summed == CHECKSUM_PARTIAL) 1981 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1982 1983 swqe->tcp_offset = swqe->ip_end + 1 + 1984 offsetof(struct tcphdr, check); 1985 break; 1986 } 1987 } 1988 1989 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 1990 struct ehea_swqe *swqe, u32 lkey) 1991 { 1992 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 1993 1994 xmit_common(skb, swqe); 1995 1996 write_swqe2_data(skb, dev, swqe, lkey); 1997 } 1998 1999 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 2000 struct ehea_swqe *swqe) 2001 { 2002 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2003 2004 xmit_common(skb, swqe); 2005 2006 if (!skb->data_len) 2007 skb_copy_from_linear_data(skb, imm_data, skb->len); 2008 else 2009 skb_copy_bits(skb, 0, imm_data, skb->len); 2010 2011 swqe->immediate_data_length = skb->len; 2012 dev_consume_skb_any(skb); 2013 } 2014 2015 static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2016 { 2017 struct ehea_port *port = netdev_priv(dev); 2018 struct ehea_swqe *swqe; 2019 u32 lkey; 2020 int swqe_index; 2021 struct ehea_port_res *pr; 2022 struct netdev_queue *txq; 2023 2024 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2025 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2026 2027 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2028 memset(swqe, 0, SWQE_HEADER_SIZE); 2029 atomic_dec(&pr->swqe_avail); 2030 2031 if (skb_vlan_tag_present(skb)) { 2032 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2033 swqe->vlan_tag = skb_vlan_tag_get(skb); 2034 } 2035 2036 pr->tx_packets++; 2037 pr->tx_bytes += skb->len; 2038 2039 if (skb->len <= SWQE3_MAX_IMM) { 2040 u32 sig_iv = port->sig_comp_iv; 2041 u32 swqe_num = pr->swqe_id_counter; 2042 ehea_xmit3(skb, dev, swqe); 2043 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2044 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2045 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2046 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2047 sig_iv); 2048 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2049 pr->swqe_ll_count = 0; 2050 } else 2051 pr->swqe_ll_count += 1; 2052 } else { 2053 swqe->wr_id = 2054 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2055 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2056 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2057 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2058 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2059 2060 pr->sq_skba.index++; 2061 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2062 2063 lkey = pr->send_mr.lkey; 2064 ehea_xmit2(skb, dev, swqe, lkey); 2065 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2066 } 2067 pr->swqe_id_counter += 1; 2068 2069 netif_info(port, tx_queued, dev, 2070 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2071 if (netif_msg_tx_queued(port)) 2072 ehea_dump(swqe, 512, "swqe"); 2073 2074 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2075 netif_tx_stop_queue(txq); 2076 swqe->tx_control |= EHEA_SWQE_PURGE; 2077 } 2078 2079 ehea_post_swqe(pr->qp, swqe); 2080 2081 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2082 pr->p_stats.queue_stopped++; 2083 netif_tx_stop_queue(txq); 2084 } 2085 2086 return NETDEV_TX_OK; 2087 } 2088 2089 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2090 { 2091 struct ehea_port *port = netdev_priv(dev); 2092 struct ehea_adapter *adapter = port->adapter; 2093 struct hcp_ehea_port_cb1 *cb1; 2094 int index; 2095 u64 hret; 2096 int err = 0; 2097 2098 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2099 if (!cb1) { 2100 pr_err("no mem for cb1\n"); 2101 err = -ENOMEM; 2102 goto out; 2103 } 2104 2105 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2106 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2107 if (hret != H_SUCCESS) { 2108 pr_err("query_ehea_port failed\n"); 2109 err = -EINVAL; 2110 goto out; 2111 } 2112 2113 index = (vid / 64); 2114 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2115 2116 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2117 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2118 if (hret != H_SUCCESS) { 2119 pr_err("modify_ehea_port failed\n"); 2120 err = -EINVAL; 2121 } 2122 out: 2123 free_page((unsigned long)cb1); 2124 return err; 2125 } 2126 2127 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2128 { 2129 struct ehea_port *port = netdev_priv(dev); 2130 struct ehea_adapter *adapter = port->adapter; 2131 struct hcp_ehea_port_cb1 *cb1; 2132 int index; 2133 u64 hret; 2134 int err = 0; 2135 2136 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2137 if (!cb1) { 2138 pr_err("no mem for cb1\n"); 2139 err = -ENOMEM; 2140 goto out; 2141 } 2142 2143 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2144 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2145 if (hret != H_SUCCESS) { 2146 pr_err("query_ehea_port failed\n"); 2147 err = -EINVAL; 2148 goto out; 2149 } 2150 2151 index = (vid / 64); 2152 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2153 2154 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2155 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2156 if (hret != H_SUCCESS) { 2157 pr_err("modify_ehea_port failed\n"); 2158 err = -EINVAL; 2159 } 2160 out: 2161 free_page((unsigned long)cb1); 2162 return err; 2163 } 2164 2165 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2166 { 2167 int ret = -EIO; 2168 u64 hret; 2169 u16 dummy16 = 0; 2170 u64 dummy64 = 0; 2171 struct hcp_modify_qp_cb0 *cb0; 2172 2173 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2174 if (!cb0) { 2175 ret = -ENOMEM; 2176 goto out; 2177 } 2178 2179 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2180 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2181 if (hret != H_SUCCESS) { 2182 pr_err("query_ehea_qp failed (1)\n"); 2183 goto out; 2184 } 2185 2186 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2187 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2188 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2189 &dummy64, &dummy64, &dummy16, &dummy16); 2190 if (hret != H_SUCCESS) { 2191 pr_err("modify_ehea_qp failed (1)\n"); 2192 goto out; 2193 } 2194 2195 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2196 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2197 if (hret != H_SUCCESS) { 2198 pr_err("query_ehea_qp failed (2)\n"); 2199 goto out; 2200 } 2201 2202 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2203 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2204 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2205 &dummy64, &dummy64, &dummy16, &dummy16); 2206 if (hret != H_SUCCESS) { 2207 pr_err("modify_ehea_qp failed (2)\n"); 2208 goto out; 2209 } 2210 2211 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2212 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2213 if (hret != H_SUCCESS) { 2214 pr_err("query_ehea_qp failed (3)\n"); 2215 goto out; 2216 } 2217 2218 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2219 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2220 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2221 &dummy64, &dummy64, &dummy16, &dummy16); 2222 if (hret != H_SUCCESS) { 2223 pr_err("modify_ehea_qp failed (3)\n"); 2224 goto out; 2225 } 2226 2227 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2228 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2229 if (hret != H_SUCCESS) { 2230 pr_err("query_ehea_qp failed (4)\n"); 2231 goto out; 2232 } 2233 2234 ret = 0; 2235 out: 2236 free_page((unsigned long)cb0); 2237 return ret; 2238 } 2239 2240 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2241 { 2242 int ret, i; 2243 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2244 enum ehea_eq_type eq_type = EHEA_EQ; 2245 2246 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2247 EHEA_MAX_ENTRIES_EQ, 1); 2248 if (!port->qp_eq) { 2249 ret = -EINVAL; 2250 pr_err("ehea_create_eq failed (qp_eq)\n"); 2251 goto out_kill_eq; 2252 } 2253 2254 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2255 pr_cfg.max_entries_scq = sq_entries * 2; 2256 pr_cfg.max_entries_sq = sq_entries; 2257 pr_cfg.max_entries_rq1 = rq1_entries; 2258 pr_cfg.max_entries_rq2 = rq2_entries; 2259 pr_cfg.max_entries_rq3 = rq3_entries; 2260 2261 pr_cfg_small_rx.max_entries_rcq = 1; 2262 pr_cfg_small_rx.max_entries_scq = sq_entries; 2263 pr_cfg_small_rx.max_entries_sq = sq_entries; 2264 pr_cfg_small_rx.max_entries_rq1 = 1; 2265 pr_cfg_small_rx.max_entries_rq2 = 1; 2266 pr_cfg_small_rx.max_entries_rq3 = 1; 2267 2268 for (i = 0; i < def_qps; i++) { 2269 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2270 if (ret) 2271 goto out_clean_pr; 2272 } 2273 for (i = def_qps; i < def_qps; i++) { 2274 ret = ehea_init_port_res(port, &port->port_res[i], 2275 &pr_cfg_small_rx, i); 2276 if (ret) 2277 goto out_clean_pr; 2278 } 2279 2280 return 0; 2281 2282 out_clean_pr: 2283 while (--i >= 0) 2284 ehea_clean_portres(port, &port->port_res[i]); 2285 2286 out_kill_eq: 2287 ehea_destroy_eq(port->qp_eq); 2288 return ret; 2289 } 2290 2291 static int ehea_clean_all_portres(struct ehea_port *port) 2292 { 2293 int ret = 0; 2294 int i; 2295 2296 for (i = 0; i < port->num_def_qps; i++) 2297 ret |= ehea_clean_portres(port, &port->port_res[i]); 2298 2299 ret |= ehea_destroy_eq(port->qp_eq); 2300 2301 return ret; 2302 } 2303 2304 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2305 { 2306 if (adapter->active_ports) 2307 return; 2308 2309 ehea_rem_mr(&adapter->mr); 2310 } 2311 2312 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2313 { 2314 if (adapter->active_ports) 2315 return 0; 2316 2317 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2318 } 2319 2320 static int ehea_up(struct net_device *dev) 2321 { 2322 int ret, i; 2323 struct ehea_port *port = netdev_priv(dev); 2324 2325 if (port->state == EHEA_PORT_UP) 2326 return 0; 2327 2328 ret = ehea_port_res_setup(port, port->num_def_qps); 2329 if (ret) { 2330 netdev_err(dev, "port_res_failed\n"); 2331 goto out; 2332 } 2333 2334 /* Set default QP for this port */ 2335 ret = ehea_configure_port(port); 2336 if (ret) { 2337 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2338 goto out_clean_pr; 2339 } 2340 2341 ret = ehea_reg_interrupts(dev); 2342 if (ret) { 2343 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2344 goto out_clean_pr; 2345 } 2346 2347 for (i = 0; i < port->num_def_qps; i++) { 2348 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2349 if (ret) { 2350 netdev_err(dev, "activate_qp failed\n"); 2351 goto out_free_irqs; 2352 } 2353 } 2354 2355 for (i = 0; i < port->num_def_qps; i++) { 2356 ret = ehea_fill_port_res(&port->port_res[i]); 2357 if (ret) { 2358 netdev_err(dev, "out_free_irqs\n"); 2359 goto out_free_irqs; 2360 } 2361 } 2362 2363 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2364 if (ret) { 2365 ret = -EIO; 2366 goto out_free_irqs; 2367 } 2368 2369 port->state = EHEA_PORT_UP; 2370 2371 ret = 0; 2372 goto out; 2373 2374 out_free_irqs: 2375 ehea_free_interrupts(dev); 2376 2377 out_clean_pr: 2378 ehea_clean_all_portres(port); 2379 out: 2380 if (ret) 2381 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2382 2383 ehea_update_bcmc_registrations(); 2384 ehea_update_firmware_handles(); 2385 2386 return ret; 2387 } 2388 2389 static void port_napi_disable(struct ehea_port *port) 2390 { 2391 int i; 2392 2393 for (i = 0; i < port->num_def_qps; i++) 2394 napi_disable(&port->port_res[i].napi); 2395 } 2396 2397 static void port_napi_enable(struct ehea_port *port) 2398 { 2399 int i; 2400 2401 for (i = 0; i < port->num_def_qps; i++) 2402 napi_enable(&port->port_res[i].napi); 2403 } 2404 2405 static int ehea_open(struct net_device *dev) 2406 { 2407 int ret; 2408 struct ehea_port *port = netdev_priv(dev); 2409 2410 mutex_lock(&port->port_lock); 2411 2412 netif_info(port, ifup, dev, "enabling port\n"); 2413 2414 netif_carrier_off(dev); 2415 2416 ret = ehea_up(dev); 2417 if (!ret) { 2418 port_napi_enable(port); 2419 netif_tx_start_all_queues(dev); 2420 } 2421 2422 mutex_unlock(&port->port_lock); 2423 schedule_delayed_work(&port->stats_work, 2424 round_jiffies_relative(msecs_to_jiffies(1000))); 2425 2426 return ret; 2427 } 2428 2429 static int ehea_down(struct net_device *dev) 2430 { 2431 int ret; 2432 struct ehea_port *port = netdev_priv(dev); 2433 2434 if (port->state == EHEA_PORT_DOWN) 2435 return 0; 2436 2437 ehea_drop_multicast_list(dev); 2438 ehea_allmulti(dev, 0); 2439 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2440 2441 ehea_free_interrupts(dev); 2442 2443 port->state = EHEA_PORT_DOWN; 2444 2445 ehea_update_bcmc_registrations(); 2446 2447 ret = ehea_clean_all_portres(port); 2448 if (ret) 2449 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2450 2451 ehea_update_firmware_handles(); 2452 2453 return ret; 2454 } 2455 2456 static int ehea_stop(struct net_device *dev) 2457 { 2458 int ret; 2459 struct ehea_port *port = netdev_priv(dev); 2460 2461 netif_info(port, ifdown, dev, "disabling port\n"); 2462 2463 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2464 cancel_work_sync(&port->reset_task); 2465 cancel_delayed_work_sync(&port->stats_work); 2466 mutex_lock(&port->port_lock); 2467 netif_tx_stop_all_queues(dev); 2468 port_napi_disable(port); 2469 ret = ehea_down(dev); 2470 mutex_unlock(&port->port_lock); 2471 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2472 return ret; 2473 } 2474 2475 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2476 { 2477 struct ehea_qp qp = *orig_qp; 2478 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2479 struct ehea_swqe *swqe; 2480 int wqe_index; 2481 int i; 2482 2483 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2484 swqe = ehea_get_swqe(&qp, &wqe_index); 2485 swqe->tx_control |= EHEA_SWQE_PURGE; 2486 } 2487 } 2488 2489 static void ehea_flush_sq(struct ehea_port *port) 2490 { 2491 int i; 2492 2493 for (i = 0; i < port->num_def_qps; i++) { 2494 struct ehea_port_res *pr = &port->port_res[i]; 2495 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2496 int ret; 2497 2498 ret = wait_event_timeout(port->swqe_avail_wq, 2499 atomic_read(&pr->swqe_avail) >= swqe_max, 2500 msecs_to_jiffies(100)); 2501 2502 if (!ret) { 2503 pr_err("WARNING: sq not flushed completely\n"); 2504 break; 2505 } 2506 } 2507 } 2508 2509 static int ehea_stop_qps(struct net_device *dev) 2510 { 2511 struct ehea_port *port = netdev_priv(dev); 2512 struct ehea_adapter *adapter = port->adapter; 2513 struct hcp_modify_qp_cb0 *cb0; 2514 int ret = -EIO; 2515 int dret; 2516 int i; 2517 u64 hret; 2518 u64 dummy64 = 0; 2519 u16 dummy16 = 0; 2520 2521 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2522 if (!cb0) { 2523 ret = -ENOMEM; 2524 goto out; 2525 } 2526 2527 for (i = 0; i < (port->num_def_qps); i++) { 2528 struct ehea_port_res *pr = &port->port_res[i]; 2529 struct ehea_qp *qp = pr->qp; 2530 2531 /* Purge send queue */ 2532 ehea_purge_sq(qp); 2533 2534 /* Disable queue pair */ 2535 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2536 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2537 cb0); 2538 if (hret != H_SUCCESS) { 2539 pr_err("query_ehea_qp failed (1)\n"); 2540 goto out; 2541 } 2542 2543 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2544 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2545 2546 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2547 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2548 1), cb0, &dummy64, 2549 &dummy64, &dummy16, &dummy16); 2550 if (hret != H_SUCCESS) { 2551 pr_err("modify_ehea_qp failed (1)\n"); 2552 goto out; 2553 } 2554 2555 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2556 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2557 cb0); 2558 if (hret != H_SUCCESS) { 2559 pr_err("query_ehea_qp failed (2)\n"); 2560 goto out; 2561 } 2562 2563 /* deregister shared memory regions */ 2564 dret = ehea_rem_smrs(pr); 2565 if (dret) { 2566 pr_err("unreg shared memory region failed\n"); 2567 goto out; 2568 } 2569 } 2570 2571 ret = 0; 2572 out: 2573 free_page((unsigned long)cb0); 2574 2575 return ret; 2576 } 2577 2578 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2579 { 2580 struct ehea_qp qp = *orig_qp; 2581 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2582 struct ehea_rwqe *rwqe; 2583 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2584 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2585 struct sk_buff *skb; 2586 u32 lkey = pr->recv_mr.lkey; 2587 2588 2589 int i; 2590 int index; 2591 2592 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2593 rwqe = ehea_get_next_rwqe(&qp, 2); 2594 rwqe->sg_list[0].l_key = lkey; 2595 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2596 skb = skba_rq2[index]; 2597 if (skb) 2598 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2599 } 2600 2601 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2602 rwqe = ehea_get_next_rwqe(&qp, 3); 2603 rwqe->sg_list[0].l_key = lkey; 2604 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2605 skb = skba_rq3[index]; 2606 if (skb) 2607 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2608 } 2609 } 2610 2611 static int ehea_restart_qps(struct net_device *dev) 2612 { 2613 struct ehea_port *port = netdev_priv(dev); 2614 struct ehea_adapter *adapter = port->adapter; 2615 int ret = 0; 2616 int i; 2617 2618 struct hcp_modify_qp_cb0 *cb0; 2619 u64 hret; 2620 u64 dummy64 = 0; 2621 u16 dummy16 = 0; 2622 2623 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2624 if (!cb0) 2625 return -ENOMEM; 2626 2627 for (i = 0; i < (port->num_def_qps); i++) { 2628 struct ehea_port_res *pr = &port->port_res[i]; 2629 struct ehea_qp *qp = pr->qp; 2630 2631 ret = ehea_gen_smrs(pr); 2632 if (ret) { 2633 netdev_err(dev, "creation of shared memory regions failed\n"); 2634 goto out; 2635 } 2636 2637 ehea_update_rqs(qp, pr); 2638 2639 /* Enable queue pair */ 2640 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2641 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2642 cb0); 2643 if (hret != H_SUCCESS) { 2644 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2645 ret = -EFAULT; 2646 goto out; 2647 } 2648 2649 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2650 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2651 2652 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2653 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2654 1), cb0, &dummy64, 2655 &dummy64, &dummy16, &dummy16); 2656 if (hret != H_SUCCESS) { 2657 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2658 ret = -EFAULT; 2659 goto out; 2660 } 2661 2662 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2663 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2664 cb0); 2665 if (hret != H_SUCCESS) { 2666 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2667 ret = -EFAULT; 2668 goto out; 2669 } 2670 2671 /* refill entire queue */ 2672 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2673 ehea_refill_rq2(pr, 0); 2674 ehea_refill_rq3(pr, 0); 2675 } 2676 out: 2677 free_page((unsigned long)cb0); 2678 2679 return ret; 2680 } 2681 2682 static void ehea_reset_port(struct work_struct *work) 2683 { 2684 int ret; 2685 struct ehea_port *port = 2686 container_of(work, struct ehea_port, reset_task); 2687 struct net_device *dev = port->netdev; 2688 2689 mutex_lock(&dlpar_mem_lock); 2690 port->resets++; 2691 mutex_lock(&port->port_lock); 2692 netif_tx_disable(dev); 2693 2694 port_napi_disable(port); 2695 2696 ehea_down(dev); 2697 2698 ret = ehea_up(dev); 2699 if (ret) 2700 goto out; 2701 2702 ehea_set_multicast_list(dev); 2703 2704 netif_info(port, timer, dev, "reset successful\n"); 2705 2706 port_napi_enable(port); 2707 2708 netif_tx_wake_all_queues(dev); 2709 out: 2710 mutex_unlock(&port->port_lock); 2711 mutex_unlock(&dlpar_mem_lock); 2712 } 2713 2714 static void ehea_rereg_mrs(void) 2715 { 2716 int ret, i; 2717 struct ehea_adapter *adapter; 2718 2719 pr_info("LPAR memory changed - re-initializing driver\n"); 2720 2721 list_for_each_entry(adapter, &adapter_list, list) 2722 if (adapter->active_ports) { 2723 /* Shutdown all ports */ 2724 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2725 struct ehea_port *port = adapter->port[i]; 2726 struct net_device *dev; 2727 2728 if (!port) 2729 continue; 2730 2731 dev = port->netdev; 2732 2733 if (dev->flags & IFF_UP) { 2734 mutex_lock(&port->port_lock); 2735 netif_tx_disable(dev); 2736 ehea_flush_sq(port); 2737 ret = ehea_stop_qps(dev); 2738 if (ret) { 2739 mutex_unlock(&port->port_lock); 2740 goto out; 2741 } 2742 port_napi_disable(port); 2743 mutex_unlock(&port->port_lock); 2744 } 2745 reset_sq_restart_flag(port); 2746 } 2747 2748 /* Unregister old memory region */ 2749 ret = ehea_rem_mr(&adapter->mr); 2750 if (ret) { 2751 pr_err("unregister MR failed - driver inoperable!\n"); 2752 goto out; 2753 } 2754 } 2755 2756 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2757 2758 list_for_each_entry(adapter, &adapter_list, list) 2759 if (adapter->active_ports) { 2760 /* Register new memory region */ 2761 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2762 if (ret) { 2763 pr_err("register MR failed - driver inoperable!\n"); 2764 goto out; 2765 } 2766 2767 /* Restart all ports */ 2768 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2769 struct ehea_port *port = adapter->port[i]; 2770 2771 if (port) { 2772 struct net_device *dev = port->netdev; 2773 2774 if (dev->flags & IFF_UP) { 2775 mutex_lock(&port->port_lock); 2776 ret = ehea_restart_qps(dev); 2777 if (!ret) { 2778 check_sqs(port); 2779 port_napi_enable(port); 2780 netif_tx_wake_all_queues(dev); 2781 } else { 2782 netdev_err(dev, "Unable to restart QPS\n"); 2783 } 2784 mutex_unlock(&port->port_lock); 2785 } 2786 } 2787 } 2788 } 2789 pr_info("re-initializing driver complete\n"); 2790 out: 2791 return; 2792 } 2793 2794 static void ehea_tx_watchdog(struct net_device *dev, unsigned int txqueue) 2795 { 2796 struct ehea_port *port = netdev_priv(dev); 2797 2798 if (netif_carrier_ok(dev) && 2799 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2800 ehea_schedule_port_reset(port); 2801 } 2802 2803 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2804 { 2805 struct hcp_query_ehea *cb; 2806 u64 hret; 2807 int ret; 2808 2809 cb = (void *)get_zeroed_page(GFP_KERNEL); 2810 if (!cb) { 2811 ret = -ENOMEM; 2812 goto out; 2813 } 2814 2815 hret = ehea_h_query_ehea(adapter->handle, cb); 2816 2817 if (hret != H_SUCCESS) { 2818 ret = -EIO; 2819 goto out_herr; 2820 } 2821 2822 adapter->max_mc_mac = cb->max_mc_mac - 1; 2823 ret = 0; 2824 2825 out_herr: 2826 free_page((unsigned long)cb); 2827 out: 2828 return ret; 2829 } 2830 2831 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2832 { 2833 struct hcp_ehea_port_cb4 *cb4; 2834 u64 hret; 2835 int ret = 0; 2836 2837 *jumbo = 0; 2838 2839 /* (Try to) enable *jumbo frames */ 2840 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2841 if (!cb4) { 2842 pr_err("no mem for cb4\n"); 2843 ret = -ENOMEM; 2844 goto out; 2845 } else { 2846 hret = ehea_h_query_ehea_port(port->adapter->handle, 2847 port->logical_port_id, 2848 H_PORT_CB4, 2849 H_PORT_CB4_JUMBO, cb4); 2850 if (hret == H_SUCCESS) { 2851 if (cb4->jumbo_frame) 2852 *jumbo = 1; 2853 else { 2854 cb4->jumbo_frame = 1; 2855 hret = ehea_h_modify_ehea_port(port->adapter-> 2856 handle, 2857 port-> 2858 logical_port_id, 2859 H_PORT_CB4, 2860 H_PORT_CB4_JUMBO, 2861 cb4); 2862 if (hret == H_SUCCESS) 2863 *jumbo = 1; 2864 } 2865 } else 2866 ret = -EINVAL; 2867 2868 free_page((unsigned long)cb4); 2869 } 2870 out: 2871 return ret; 2872 } 2873 2874 static ssize_t log_port_id_show(struct device *dev, 2875 struct device_attribute *attr, char *buf) 2876 { 2877 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2878 return sprintf(buf, "%d", port->logical_port_id); 2879 } 2880 2881 static DEVICE_ATTR_RO(log_port_id); 2882 2883 static void logical_port_release(struct device *dev) 2884 { 2885 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2886 of_node_put(port->ofdev.dev.of_node); 2887 } 2888 2889 static struct device *ehea_register_port(struct ehea_port *port, 2890 struct device_node *dn) 2891 { 2892 int ret; 2893 2894 port->ofdev.dev.of_node = of_node_get(dn); 2895 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2896 port->ofdev.dev.bus = &ibmebus_bus_type; 2897 2898 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2899 port->ofdev.dev.release = logical_port_release; 2900 2901 ret = of_device_register(&port->ofdev); 2902 if (ret) { 2903 pr_err("failed to register device. ret=%d\n", ret); 2904 put_device(&port->ofdev.dev); 2905 goto out; 2906 } 2907 2908 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2909 if (ret) { 2910 pr_err("failed to register attributes, ret=%d\n", ret); 2911 goto out_unreg_of_dev; 2912 } 2913 2914 return &port->ofdev.dev; 2915 2916 out_unreg_of_dev: 2917 of_device_unregister(&port->ofdev); 2918 out: 2919 return NULL; 2920 } 2921 2922 static void ehea_unregister_port(struct ehea_port *port) 2923 { 2924 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2925 of_device_unregister(&port->ofdev); 2926 } 2927 2928 static const struct net_device_ops ehea_netdev_ops = { 2929 .ndo_open = ehea_open, 2930 .ndo_stop = ehea_stop, 2931 .ndo_start_xmit = ehea_start_xmit, 2932 .ndo_get_stats64 = ehea_get_stats64, 2933 .ndo_set_mac_address = ehea_set_mac_addr, 2934 .ndo_validate_addr = eth_validate_addr, 2935 .ndo_set_rx_mode = ehea_set_multicast_list, 2936 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2937 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2938 .ndo_tx_timeout = ehea_tx_watchdog, 2939 }; 2940 2941 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2942 u32 logical_port_id, 2943 struct device_node *dn) 2944 { 2945 int ret; 2946 struct net_device *dev; 2947 struct ehea_port *port; 2948 struct device *port_dev; 2949 int jumbo; 2950 2951 /* allocate memory for the port structures */ 2952 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2953 2954 if (!dev) { 2955 ret = -ENOMEM; 2956 goto out_err; 2957 } 2958 2959 port = netdev_priv(dev); 2960 2961 mutex_init(&port->port_lock); 2962 port->state = EHEA_PORT_DOWN; 2963 port->sig_comp_iv = sq_entries / 10; 2964 2965 port->adapter = adapter; 2966 port->netdev = dev; 2967 port->logical_port_id = logical_port_id; 2968 2969 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 2970 2971 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 2972 if (!port->mc_list) { 2973 ret = -ENOMEM; 2974 goto out_free_ethdev; 2975 } 2976 2977 INIT_LIST_HEAD(&port->mc_list->list); 2978 2979 ret = ehea_sense_port_attr(port); 2980 if (ret) 2981 goto out_free_mc_list; 2982 2983 netif_set_real_num_rx_queues(dev, port->num_def_qps); 2984 netif_set_real_num_tx_queues(dev, port->num_def_qps); 2985 2986 port_dev = ehea_register_port(port, dn); 2987 if (!port_dev) 2988 goto out_free_mc_list; 2989 2990 SET_NETDEV_DEV(dev, port_dev); 2991 2992 /* initialize net_device structure */ 2993 eth_hw_addr_set(dev, (u8 *)&port->mac_addr); 2994 2995 dev->netdev_ops = &ehea_netdev_ops; 2996 ehea_set_ethtool_ops(dev); 2997 2998 dev->hw_features = NETIF_F_SG | NETIF_F_TSO | 2999 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX; 3000 dev->features = NETIF_F_SG | NETIF_F_TSO | 3001 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | 3002 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 3003 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM; 3004 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3005 NETIF_F_IP_CSUM; 3006 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3007 3008 /* MTU range: 68 - 9022 */ 3009 dev->min_mtu = ETH_MIN_MTU; 3010 dev->max_mtu = EHEA_MAX_PACKET_SIZE; 3011 3012 INIT_WORK(&port->reset_task, ehea_reset_port); 3013 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3014 3015 init_waitqueue_head(&port->swqe_avail_wq); 3016 init_waitqueue_head(&port->restart_wq); 3017 3018 ret = register_netdev(dev); 3019 if (ret) { 3020 pr_err("register_netdev failed. ret=%d\n", ret); 3021 goto out_unreg_port; 3022 } 3023 3024 ret = ehea_get_jumboframe_status(port, &jumbo); 3025 if (ret) 3026 netdev_err(dev, "failed determining jumbo frame status\n"); 3027 3028 netdev_info(dev, "Jumbo frames are %sabled\n", 3029 jumbo == 1 ? "en" : "dis"); 3030 3031 adapter->active_ports++; 3032 3033 return port; 3034 3035 out_unreg_port: 3036 ehea_unregister_port(port); 3037 3038 out_free_mc_list: 3039 kfree(port->mc_list); 3040 3041 out_free_ethdev: 3042 free_netdev(dev); 3043 3044 out_err: 3045 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3046 logical_port_id, ret); 3047 return NULL; 3048 } 3049 3050 static void ehea_shutdown_single_port(struct ehea_port *port) 3051 { 3052 struct ehea_adapter *adapter = port->adapter; 3053 3054 cancel_work_sync(&port->reset_task); 3055 cancel_delayed_work_sync(&port->stats_work); 3056 unregister_netdev(port->netdev); 3057 ehea_unregister_port(port); 3058 kfree(port->mc_list); 3059 free_netdev(port->netdev); 3060 adapter->active_ports--; 3061 } 3062 3063 static int ehea_setup_ports(struct ehea_adapter *adapter) 3064 { 3065 struct device_node *lhea_dn; 3066 struct device_node *eth_dn = NULL; 3067 3068 const u32 *dn_log_port_id; 3069 int i = 0; 3070 3071 lhea_dn = adapter->ofdev->dev.of_node; 3072 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3073 3074 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3075 NULL); 3076 if (!dn_log_port_id) { 3077 pr_err("bad device node: eth_dn name=%pOF\n", eth_dn); 3078 continue; 3079 } 3080 3081 if (ehea_add_adapter_mr(adapter)) { 3082 pr_err("creating MR failed\n"); 3083 of_node_put(eth_dn); 3084 return -EIO; 3085 } 3086 3087 adapter->port[i] = ehea_setup_single_port(adapter, 3088 *dn_log_port_id, 3089 eth_dn); 3090 if (adapter->port[i]) 3091 netdev_info(adapter->port[i]->netdev, 3092 "logical port id #%d\n", *dn_log_port_id); 3093 else 3094 ehea_remove_adapter_mr(adapter); 3095 3096 i++; 3097 } 3098 return 0; 3099 } 3100 3101 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3102 u32 logical_port_id) 3103 { 3104 struct device_node *lhea_dn; 3105 struct device_node *eth_dn = NULL; 3106 const u32 *dn_log_port_id; 3107 3108 lhea_dn = adapter->ofdev->dev.of_node; 3109 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3110 3111 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3112 NULL); 3113 if (dn_log_port_id) 3114 if (*dn_log_port_id == logical_port_id) 3115 return eth_dn; 3116 } 3117 3118 return NULL; 3119 } 3120 3121 static ssize_t probe_port_store(struct device *dev, 3122 struct device_attribute *attr, 3123 const char *buf, size_t count) 3124 { 3125 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3126 struct ehea_port *port; 3127 struct device_node *eth_dn = NULL; 3128 int i; 3129 3130 u32 logical_port_id; 3131 3132 sscanf(buf, "%d", &logical_port_id); 3133 3134 port = ehea_get_port(adapter, logical_port_id); 3135 3136 if (port) { 3137 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3138 logical_port_id); 3139 return -EINVAL; 3140 } 3141 3142 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3143 3144 if (!eth_dn) { 3145 pr_info("no logical port with id %d found\n", logical_port_id); 3146 return -EINVAL; 3147 } 3148 3149 if (ehea_add_adapter_mr(adapter)) { 3150 pr_err("creating MR failed\n"); 3151 of_node_put(eth_dn); 3152 return -EIO; 3153 } 3154 3155 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3156 3157 of_node_put(eth_dn); 3158 3159 if (port) { 3160 for (i = 0; i < EHEA_MAX_PORTS; i++) 3161 if (!adapter->port[i]) { 3162 adapter->port[i] = port; 3163 break; 3164 } 3165 3166 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3167 logical_port_id); 3168 } else { 3169 ehea_remove_adapter_mr(adapter); 3170 return -EIO; 3171 } 3172 3173 return (ssize_t) count; 3174 } 3175 3176 static ssize_t remove_port_store(struct device *dev, 3177 struct device_attribute *attr, 3178 const char *buf, size_t count) 3179 { 3180 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3181 struct ehea_port *port; 3182 int i; 3183 u32 logical_port_id; 3184 3185 sscanf(buf, "%d", &logical_port_id); 3186 3187 port = ehea_get_port(adapter, logical_port_id); 3188 3189 if (port) { 3190 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3191 logical_port_id); 3192 3193 ehea_shutdown_single_port(port); 3194 3195 for (i = 0; i < EHEA_MAX_PORTS; i++) 3196 if (adapter->port[i] == port) { 3197 adapter->port[i] = NULL; 3198 break; 3199 } 3200 } else { 3201 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3202 logical_port_id); 3203 return -EINVAL; 3204 } 3205 3206 ehea_remove_adapter_mr(adapter); 3207 3208 return (ssize_t) count; 3209 } 3210 3211 static DEVICE_ATTR_WO(probe_port); 3212 static DEVICE_ATTR_WO(remove_port); 3213 3214 static int ehea_create_device_sysfs(struct platform_device *dev) 3215 { 3216 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3217 if (ret) 3218 goto out; 3219 3220 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3221 out: 3222 return ret; 3223 } 3224 3225 static void ehea_remove_device_sysfs(struct platform_device *dev) 3226 { 3227 device_remove_file(&dev->dev, &dev_attr_probe_port); 3228 device_remove_file(&dev->dev, &dev_attr_remove_port); 3229 } 3230 3231 static int ehea_reboot_notifier(struct notifier_block *nb, 3232 unsigned long action, void *unused) 3233 { 3234 if (action == SYS_RESTART) { 3235 pr_info("Reboot: freeing all eHEA resources\n"); 3236 ibmebus_unregister_driver(&ehea_driver); 3237 } 3238 return NOTIFY_DONE; 3239 } 3240 3241 static struct notifier_block ehea_reboot_nb = { 3242 .notifier_call = ehea_reboot_notifier, 3243 }; 3244 3245 static int ehea_mem_notifier(struct notifier_block *nb, 3246 unsigned long action, void *data) 3247 { 3248 int ret = NOTIFY_BAD; 3249 struct memory_notify *arg = data; 3250 3251 mutex_lock(&dlpar_mem_lock); 3252 3253 switch (action) { 3254 case MEM_CANCEL_OFFLINE: 3255 pr_info("memory offlining canceled"); 3256 fallthrough; /* re-add canceled memory block */ 3257 3258 case MEM_ONLINE: 3259 pr_info("memory is going online"); 3260 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3261 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3262 goto out_unlock; 3263 ehea_rereg_mrs(); 3264 break; 3265 3266 case MEM_GOING_OFFLINE: 3267 pr_info("memory is going offline"); 3268 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3269 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3270 goto out_unlock; 3271 ehea_rereg_mrs(); 3272 break; 3273 3274 default: 3275 break; 3276 } 3277 3278 ehea_update_firmware_handles(); 3279 ret = NOTIFY_OK; 3280 3281 out_unlock: 3282 mutex_unlock(&dlpar_mem_lock); 3283 return ret; 3284 } 3285 3286 static struct notifier_block ehea_mem_nb = { 3287 .notifier_call = ehea_mem_notifier, 3288 }; 3289 3290 static void ehea_crash_handler(void) 3291 { 3292 int i; 3293 3294 if (ehea_fw_handles.arr) 3295 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3296 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3297 ehea_fw_handles.arr[i].fwh, 3298 FORCE_FREE); 3299 3300 if (ehea_bcmc_regs.arr) 3301 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3302 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3303 ehea_bcmc_regs.arr[i].port_id, 3304 ehea_bcmc_regs.arr[i].reg_type, 3305 ehea_bcmc_regs.arr[i].macaddr, 3306 0, H_DEREG_BCMC); 3307 } 3308 3309 static atomic_t ehea_memory_hooks_registered; 3310 3311 /* Register memory hooks on probe of first adapter */ 3312 static int ehea_register_memory_hooks(void) 3313 { 3314 int ret = 0; 3315 3316 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1) 3317 return 0; 3318 3319 ret = ehea_create_busmap(); 3320 if (ret) { 3321 pr_info("ehea_create_busmap failed\n"); 3322 goto out; 3323 } 3324 3325 ret = register_reboot_notifier(&ehea_reboot_nb); 3326 if (ret) { 3327 pr_info("register_reboot_notifier failed\n"); 3328 goto out; 3329 } 3330 3331 ret = register_memory_notifier(&ehea_mem_nb); 3332 if (ret) { 3333 pr_info("register_memory_notifier failed\n"); 3334 goto out2; 3335 } 3336 3337 ret = crash_shutdown_register(ehea_crash_handler); 3338 if (ret) { 3339 pr_info("crash_shutdown_register failed\n"); 3340 goto out3; 3341 } 3342 3343 return 0; 3344 3345 out3: 3346 unregister_memory_notifier(&ehea_mem_nb); 3347 out2: 3348 unregister_reboot_notifier(&ehea_reboot_nb); 3349 out: 3350 atomic_dec(&ehea_memory_hooks_registered); 3351 return ret; 3352 } 3353 3354 static void ehea_unregister_memory_hooks(void) 3355 { 3356 /* Only remove the hooks if we've registered them */ 3357 if (atomic_read(&ehea_memory_hooks_registered) == 0) 3358 return; 3359 3360 unregister_reboot_notifier(&ehea_reboot_nb); 3361 if (crash_shutdown_unregister(ehea_crash_handler)) 3362 pr_info("failed unregistering crash handler\n"); 3363 unregister_memory_notifier(&ehea_mem_nb); 3364 } 3365 3366 static int ehea_probe_adapter(struct platform_device *dev) 3367 { 3368 struct ehea_adapter *adapter; 3369 const u64 *adapter_handle; 3370 int ret; 3371 int i; 3372 3373 ret = ehea_register_memory_hooks(); 3374 if (ret) 3375 return ret; 3376 3377 if (!dev || !dev->dev.of_node) { 3378 pr_err("Invalid ibmebus device probed\n"); 3379 return -EINVAL; 3380 } 3381 3382 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL); 3383 if (!adapter) { 3384 ret = -ENOMEM; 3385 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3386 goto out; 3387 } 3388 3389 list_add(&adapter->list, &adapter_list); 3390 3391 adapter->ofdev = dev; 3392 3393 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3394 NULL); 3395 if (adapter_handle) 3396 adapter->handle = *adapter_handle; 3397 3398 if (!adapter->handle) { 3399 dev_err(&dev->dev, "failed getting handle for adapter" 3400 " '%pOF'\n", dev->dev.of_node); 3401 ret = -ENODEV; 3402 goto out_free_ad; 3403 } 3404 3405 adapter->pd = EHEA_PD_ID; 3406 3407 platform_set_drvdata(dev, adapter); 3408 3409 3410 /* initialize adapter and ports */ 3411 /* get adapter properties */ 3412 ret = ehea_sense_adapter_attr(adapter); 3413 if (ret) { 3414 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3415 goto out_free_ad; 3416 } 3417 3418 adapter->neq = ehea_create_eq(adapter, 3419 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3420 if (!adapter->neq) { 3421 ret = -EIO; 3422 dev_err(&dev->dev, "NEQ creation failed\n"); 3423 goto out_free_ad; 3424 } 3425 3426 tasklet_setup(&adapter->neq_tasklet, ehea_neq_tasklet); 3427 3428 ret = ehea_create_device_sysfs(dev); 3429 if (ret) 3430 goto out_kill_eq; 3431 3432 ret = ehea_setup_ports(adapter); 3433 if (ret) { 3434 dev_err(&dev->dev, "setup_ports failed\n"); 3435 goto out_rem_dev_sysfs; 3436 } 3437 3438 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3439 ehea_interrupt_neq, 0, 3440 "ehea_neq", adapter); 3441 if (ret) { 3442 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3443 goto out_shutdown_ports; 3444 } 3445 3446 /* Handle any events that might be pending. */ 3447 tasklet_hi_schedule(&adapter->neq_tasklet); 3448 3449 ret = 0; 3450 goto out; 3451 3452 out_shutdown_ports: 3453 for (i = 0; i < EHEA_MAX_PORTS; i++) 3454 if (adapter->port[i]) { 3455 ehea_shutdown_single_port(adapter->port[i]); 3456 adapter->port[i] = NULL; 3457 } 3458 3459 out_rem_dev_sysfs: 3460 ehea_remove_device_sysfs(dev); 3461 3462 out_kill_eq: 3463 ehea_destroy_eq(adapter->neq); 3464 3465 out_free_ad: 3466 list_del(&adapter->list); 3467 3468 out: 3469 ehea_update_firmware_handles(); 3470 3471 return ret; 3472 } 3473 3474 static void ehea_remove(struct platform_device *dev) 3475 { 3476 struct ehea_adapter *adapter = platform_get_drvdata(dev); 3477 int i; 3478 3479 for (i = 0; i < EHEA_MAX_PORTS; i++) 3480 if (adapter->port[i]) { 3481 ehea_shutdown_single_port(adapter->port[i]); 3482 adapter->port[i] = NULL; 3483 } 3484 3485 ehea_remove_device_sysfs(dev); 3486 3487 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3488 tasklet_kill(&adapter->neq_tasklet); 3489 3490 ehea_destroy_eq(adapter->neq); 3491 ehea_remove_adapter_mr(adapter); 3492 list_del(&adapter->list); 3493 3494 ehea_update_firmware_handles(); 3495 } 3496 3497 static int check_module_parm(void) 3498 { 3499 int ret = 0; 3500 3501 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3502 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3503 pr_info("Bad parameter: rq1_entries\n"); 3504 ret = -EINVAL; 3505 } 3506 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3507 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3508 pr_info("Bad parameter: rq2_entries\n"); 3509 ret = -EINVAL; 3510 } 3511 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3512 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3513 pr_info("Bad parameter: rq3_entries\n"); 3514 ret = -EINVAL; 3515 } 3516 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3517 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3518 pr_info("Bad parameter: sq_entries\n"); 3519 ret = -EINVAL; 3520 } 3521 3522 return ret; 3523 } 3524 3525 static ssize_t capabilities_show(struct device_driver *drv, char *buf) 3526 { 3527 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3528 } 3529 3530 static DRIVER_ATTR_RO(capabilities); 3531 3532 static int __init ehea_module_init(void) 3533 { 3534 int ret; 3535 3536 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3537 3538 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3539 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3540 3541 mutex_init(&ehea_fw_handles.lock); 3542 spin_lock_init(&ehea_bcmc_regs.lock); 3543 3544 ret = check_module_parm(); 3545 if (ret) 3546 goto out; 3547 3548 ret = ibmebus_register_driver(&ehea_driver); 3549 if (ret) { 3550 pr_err("failed registering eHEA device driver on ebus\n"); 3551 goto out; 3552 } 3553 3554 ret = driver_create_file(&ehea_driver.driver, 3555 &driver_attr_capabilities); 3556 if (ret) { 3557 pr_err("failed to register capabilities attribute, ret=%d\n", 3558 ret); 3559 goto out2; 3560 } 3561 3562 return ret; 3563 3564 out2: 3565 ibmebus_unregister_driver(&ehea_driver); 3566 out: 3567 return ret; 3568 } 3569 3570 static void __exit ehea_module_exit(void) 3571 { 3572 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3573 ibmebus_unregister_driver(&ehea_driver); 3574 ehea_unregister_memory_hooks(); 3575 kfree(ehea_fw_handles.arr); 3576 kfree(ehea_bcmc_regs.arr); 3577 ehea_destroy_busmap(); 3578 } 3579 3580 module_init(ehea_module_init); 3581 module_exit(ehea_module_exit); 3582