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 35 #include <net/ip.h> 36 37 #include "ehea.h" 38 #include "ehea_qmr.h" 39 #include "ehea_phyp.h" 40 41 42 MODULE_LICENSE("GPL"); 43 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>"); 44 MODULE_DESCRIPTION("IBM eServer HEA Driver"); 45 MODULE_VERSION(DRV_VERSION); 46 47 48 static int msg_level = -1; 49 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1; 50 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2; 51 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3; 52 static int sq_entries = EHEA_DEF_ENTRIES_SQ; 53 static int use_mcs = 1; 54 static int prop_carrier_state; 55 56 module_param(msg_level, int, 0); 57 module_param(rq1_entries, int, 0); 58 module_param(rq2_entries, int, 0); 59 module_param(rq3_entries, int, 0); 60 module_param(sq_entries, int, 0); 61 module_param(prop_carrier_state, int, 0); 62 module_param(use_mcs, int, 0); 63 64 MODULE_PARM_DESC(msg_level, "msg_level"); 65 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical " 66 "port to stack. 1:yes, 0:no. Default = 0 "); 67 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 " 68 "[2^x - 1], x = [7..14]. Default = " 69 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")"); 70 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 " 71 "[2^x - 1], x = [7..14]. Default = " 72 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")"); 73 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 " 74 "[2^x - 1], x = [7..14]. Default = " 75 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")"); 76 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue " 77 "[2^x - 1], x = [7..14]. Default = " 78 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); 79 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, " 80 "Default = 1"); 81 82 static int port_name_cnt; 83 static LIST_HEAD(adapter_list); 84 static unsigned long ehea_driver_flags; 85 static DEFINE_MUTEX(dlpar_mem_lock); 86 static struct ehea_fw_handle_array ehea_fw_handles; 87 static struct ehea_bcmc_reg_array ehea_bcmc_regs; 88 89 90 static int ehea_probe_adapter(struct platform_device *dev); 91 92 static int ehea_remove(struct platform_device *dev); 93 94 static const struct of_device_id ehea_module_device_table[] = { 95 { 96 .name = "lhea", 97 .compatible = "IBM,lhea", 98 }, 99 { 100 .type = "network", 101 .compatible = "IBM,lhea-ethernet", 102 }, 103 {}, 104 }; 105 MODULE_DEVICE_TABLE(of, ehea_module_device_table); 106 107 static const struct of_device_id ehea_device_table[] = { 108 { 109 .name = "lhea", 110 .compatible = "IBM,lhea", 111 }, 112 {}, 113 }; 114 MODULE_DEVICE_TABLE(of, ehea_device_table); 115 116 static struct platform_driver ehea_driver = { 117 .driver = { 118 .name = "ehea", 119 .owner = THIS_MODULE, 120 .of_match_table = ehea_device_table, 121 }, 122 .probe = ehea_probe_adapter, 123 .remove = ehea_remove, 124 }; 125 126 void ehea_dump(void *adr, int len, char *msg) 127 { 128 int x; 129 unsigned char *deb = adr; 130 for (x = 0; x < len; x += 16) { 131 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n", 132 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8])); 133 deb += 16; 134 } 135 } 136 137 static void ehea_schedule_port_reset(struct ehea_port *port) 138 { 139 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags)) 140 schedule_work(&port->reset_task); 141 } 142 143 static void ehea_update_firmware_handles(void) 144 { 145 struct ehea_fw_handle_entry *arr = NULL; 146 struct ehea_adapter *adapter; 147 int num_adapters = 0; 148 int num_ports = 0; 149 int num_portres = 0; 150 int i = 0; 151 int num_fw_handles, k, l; 152 153 /* Determine number of handles */ 154 mutex_lock(&ehea_fw_handles.lock); 155 156 list_for_each_entry(adapter, &adapter_list, list) { 157 num_adapters++; 158 159 for (k = 0; k < EHEA_MAX_PORTS; k++) { 160 struct ehea_port *port = adapter->port[k]; 161 162 if (!port || (port->state != EHEA_PORT_UP)) 163 continue; 164 165 num_ports++; 166 num_portres += port->num_def_qps; 167 } 168 } 169 170 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES + 171 num_ports * EHEA_NUM_PORT_FW_HANDLES + 172 num_portres * EHEA_NUM_PORTRES_FW_HANDLES; 173 174 if (num_fw_handles) { 175 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL); 176 if (!arr) 177 goto out; /* Keep the existing array */ 178 } else 179 goto out_update; 180 181 list_for_each_entry(adapter, &adapter_list, list) { 182 if (num_adapters == 0) 183 break; 184 185 for (k = 0; k < EHEA_MAX_PORTS; k++) { 186 struct ehea_port *port = adapter->port[k]; 187 188 if (!port || (port->state != EHEA_PORT_UP) || 189 (num_ports == 0)) 190 continue; 191 192 for (l = 0; l < port->num_def_qps; l++) { 193 struct ehea_port_res *pr = &port->port_res[l]; 194 195 arr[i].adh = adapter->handle; 196 arr[i++].fwh = pr->qp->fw_handle; 197 arr[i].adh = adapter->handle; 198 arr[i++].fwh = pr->send_cq->fw_handle; 199 arr[i].adh = adapter->handle; 200 arr[i++].fwh = pr->recv_cq->fw_handle; 201 arr[i].adh = adapter->handle; 202 arr[i++].fwh = pr->eq->fw_handle; 203 arr[i].adh = adapter->handle; 204 arr[i++].fwh = pr->send_mr.handle; 205 arr[i].adh = adapter->handle; 206 arr[i++].fwh = pr->recv_mr.handle; 207 } 208 arr[i].adh = adapter->handle; 209 arr[i++].fwh = port->qp_eq->fw_handle; 210 num_ports--; 211 } 212 213 arr[i].adh = adapter->handle; 214 arr[i++].fwh = adapter->neq->fw_handle; 215 216 if (adapter->mr.handle) { 217 arr[i].adh = adapter->handle; 218 arr[i++].fwh = adapter->mr.handle; 219 } 220 num_adapters--; 221 } 222 223 out_update: 224 kfree(ehea_fw_handles.arr); 225 ehea_fw_handles.arr = arr; 226 ehea_fw_handles.num_entries = i; 227 out: 228 mutex_unlock(&ehea_fw_handles.lock); 229 } 230 231 static void ehea_update_bcmc_registrations(void) 232 { 233 unsigned long flags; 234 struct ehea_bcmc_reg_entry *arr = NULL; 235 struct ehea_adapter *adapter; 236 struct ehea_mc_list *mc_entry; 237 int num_registrations = 0; 238 int i = 0; 239 int k; 240 241 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags); 242 243 /* Determine number of registrations */ 244 list_for_each_entry(adapter, &adapter_list, list) 245 for (k = 0; k < EHEA_MAX_PORTS; k++) { 246 struct ehea_port *port = adapter->port[k]; 247 248 if (!port || (port->state != EHEA_PORT_UP)) 249 continue; 250 251 num_registrations += 2; /* Broadcast registrations */ 252 253 list_for_each_entry(mc_entry, &port->mc_list->list,list) 254 num_registrations += 2; 255 } 256 257 if (num_registrations) { 258 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC); 259 if (!arr) 260 goto out; /* Keep the existing array */ 261 } else 262 goto out_update; 263 264 list_for_each_entry(adapter, &adapter_list, list) { 265 for (k = 0; k < EHEA_MAX_PORTS; k++) { 266 struct ehea_port *port = adapter->port[k]; 267 268 if (!port || (port->state != EHEA_PORT_UP)) 269 continue; 270 271 if (num_registrations == 0) 272 goto out_update; 273 274 arr[i].adh = adapter->handle; 275 arr[i].port_id = port->logical_port_id; 276 arr[i].reg_type = EHEA_BCMC_BROADCAST | 277 EHEA_BCMC_UNTAGGED; 278 arr[i++].macaddr = port->mac_addr; 279 280 arr[i].adh = adapter->handle; 281 arr[i].port_id = port->logical_port_id; 282 arr[i].reg_type = EHEA_BCMC_BROADCAST | 283 EHEA_BCMC_VLANID_ALL; 284 arr[i++].macaddr = port->mac_addr; 285 num_registrations -= 2; 286 287 list_for_each_entry(mc_entry, 288 &port->mc_list->list, list) { 289 if (num_registrations == 0) 290 goto out_update; 291 292 arr[i].adh = adapter->handle; 293 arr[i].port_id = port->logical_port_id; 294 arr[i].reg_type = EHEA_BCMC_MULTICAST | 295 EHEA_BCMC_UNTAGGED; 296 if (mc_entry->macaddr == 0) 297 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 298 arr[i++].macaddr = mc_entry->macaddr; 299 300 arr[i].adh = adapter->handle; 301 arr[i].port_id = port->logical_port_id; 302 arr[i].reg_type = EHEA_BCMC_MULTICAST | 303 EHEA_BCMC_VLANID_ALL; 304 if (mc_entry->macaddr == 0) 305 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 306 arr[i++].macaddr = mc_entry->macaddr; 307 num_registrations -= 2; 308 } 309 } 310 } 311 312 out_update: 313 kfree(ehea_bcmc_regs.arr); 314 ehea_bcmc_regs.arr = arr; 315 ehea_bcmc_regs.num_entries = i; 316 out: 317 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags); 318 } 319 320 static void ehea_get_stats64(struct net_device *dev, 321 struct rtnl_link_stats64 *stats) 322 { 323 struct ehea_port *port = netdev_priv(dev); 324 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0; 325 int i; 326 327 for (i = 0; i < port->num_def_qps; i++) { 328 rx_packets += port->port_res[i].rx_packets; 329 rx_bytes += port->port_res[i].rx_bytes; 330 } 331 332 for (i = 0; i < port->num_def_qps; i++) { 333 tx_packets += port->port_res[i].tx_packets; 334 tx_bytes += port->port_res[i].tx_bytes; 335 } 336 337 stats->tx_packets = tx_packets; 338 stats->rx_bytes = rx_bytes; 339 stats->tx_bytes = tx_bytes; 340 stats->rx_packets = rx_packets; 341 342 stats->multicast = port->stats.multicast; 343 stats->rx_errors = port->stats.rx_errors; 344 } 345 346 static void ehea_update_stats(struct work_struct *work) 347 { 348 struct ehea_port *port = 349 container_of(work, struct ehea_port, stats_work.work); 350 struct net_device *dev = port->netdev; 351 struct rtnl_link_stats64 *stats = &port->stats; 352 struct hcp_ehea_port_cb2 *cb2; 353 u64 hret; 354 355 cb2 = (void *)get_zeroed_page(GFP_KERNEL); 356 if (!cb2) { 357 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n"); 358 goto resched; 359 } 360 361 hret = ehea_h_query_ehea_port(port->adapter->handle, 362 port->logical_port_id, 363 H_PORT_CB2, H_PORT_CB2_ALL, cb2); 364 if (hret != H_SUCCESS) { 365 netdev_err(dev, "query_ehea_port failed\n"); 366 goto out_herr; 367 } 368 369 if (netif_msg_hw(port)) 370 ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); 371 372 stats->multicast = cb2->rxmcp; 373 stats->rx_errors = cb2->rxuerr; 374 375 out_herr: 376 free_page((unsigned long)cb2); 377 resched: 378 schedule_delayed_work(&port->stats_work, 379 round_jiffies_relative(msecs_to_jiffies(1000))); 380 } 381 382 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) 383 { 384 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 385 struct net_device *dev = pr->port->netdev; 386 int max_index_mask = pr->rq1_skba.len - 1; 387 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; 388 int adder = 0; 389 int i; 390 391 pr->rq1_skba.os_skbs = 0; 392 393 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 394 if (nr_of_wqes > 0) 395 pr->rq1_skba.index = index; 396 pr->rq1_skba.os_skbs = fill_wqes; 397 return; 398 } 399 400 for (i = 0; i < fill_wqes; i++) { 401 if (!skb_arr_rq1[index]) { 402 skb_arr_rq1[index] = netdev_alloc_skb(dev, 403 EHEA_L_PKT_SIZE); 404 if (!skb_arr_rq1[index]) { 405 pr->rq1_skba.os_skbs = fill_wqes - i; 406 break; 407 } 408 } 409 index--; 410 index &= max_index_mask; 411 adder++; 412 } 413 414 if (adder == 0) 415 return; 416 417 /* Ring doorbell */ 418 ehea_update_rq1a(pr->qp, adder); 419 } 420 421 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) 422 { 423 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 424 struct net_device *dev = pr->port->netdev; 425 int i; 426 427 if (nr_rq1a > pr->rq1_skba.len) { 428 netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); 429 return; 430 } 431 432 for (i = 0; i < nr_rq1a; i++) { 433 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); 434 if (!skb_arr_rq1[i]) 435 break; 436 } 437 /* Ring doorbell */ 438 ehea_update_rq1a(pr->qp, i - 1); 439 } 440 441 static int ehea_refill_rq_def(struct ehea_port_res *pr, 442 struct ehea_q_skb_arr *q_skba, int rq_nr, 443 int num_wqes, int wqe_type, int packet_size) 444 { 445 struct net_device *dev = pr->port->netdev; 446 struct ehea_qp *qp = pr->qp; 447 struct sk_buff **skb_arr = q_skba->arr; 448 struct ehea_rwqe *rwqe; 449 int i, index, max_index_mask, fill_wqes; 450 int adder = 0; 451 int ret = 0; 452 453 fill_wqes = q_skba->os_skbs + num_wqes; 454 q_skba->os_skbs = 0; 455 456 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 457 q_skba->os_skbs = fill_wqes; 458 return ret; 459 } 460 461 index = q_skba->index; 462 max_index_mask = q_skba->len - 1; 463 for (i = 0; i < fill_wqes; i++) { 464 u64 tmp_addr; 465 struct sk_buff *skb; 466 467 skb = netdev_alloc_skb_ip_align(dev, packet_size); 468 if (!skb) { 469 q_skba->os_skbs = fill_wqes - i; 470 if (q_skba->os_skbs == q_skba->len - 2) { 471 netdev_info(pr->port->netdev, 472 "rq%i ran dry - no mem for skb\n", 473 rq_nr); 474 ret = -ENOMEM; 475 } 476 break; 477 } 478 479 skb_arr[index] = skb; 480 tmp_addr = ehea_map_vaddr(skb->data); 481 if (tmp_addr == -1) { 482 dev_consume_skb_any(skb); 483 q_skba->os_skbs = fill_wqes - i; 484 ret = 0; 485 break; 486 } 487 488 rwqe = ehea_get_next_rwqe(qp, rq_nr); 489 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type) 490 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index); 491 rwqe->sg_list[0].l_key = pr->recv_mr.lkey; 492 rwqe->sg_list[0].vaddr = tmp_addr; 493 rwqe->sg_list[0].len = packet_size; 494 rwqe->data_segments = 1; 495 496 index++; 497 index &= max_index_mask; 498 adder++; 499 } 500 501 q_skba->index = index; 502 if (adder == 0) 503 goto out; 504 505 /* Ring doorbell */ 506 iosync(); 507 if (rq_nr == 2) 508 ehea_update_rq2a(pr->qp, adder); 509 else 510 ehea_update_rq3a(pr->qp, adder); 511 out: 512 return ret; 513 } 514 515 516 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) 517 { 518 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, 519 nr_of_wqes, EHEA_RWQE2_TYPE, 520 EHEA_RQ2_PKT_SIZE); 521 } 522 523 524 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) 525 { 526 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, 527 nr_of_wqes, EHEA_RWQE3_TYPE, 528 EHEA_MAX_PACKET_SIZE); 529 } 530 531 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) 532 { 533 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; 534 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) 535 return 0; 536 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && 537 (cqe->header_length == 0)) 538 return 0; 539 return -EINVAL; 540 } 541 542 static inline void ehea_fill_skb(struct net_device *dev, 543 struct sk_buff *skb, struct ehea_cqe *cqe, 544 struct ehea_port_res *pr) 545 { 546 int length = cqe->num_bytes_transfered - 4; /*remove CRC */ 547 548 skb_put(skb, length); 549 skb->protocol = eth_type_trans(skb, dev); 550 551 /* The packet was not an IPV4 packet so a complemented checksum was 552 calculated. The value is found in the Internet Checksum field. */ 553 if (cqe->status & EHEA_CQE_BLIND_CKSUM) { 554 skb->ip_summed = CHECKSUM_COMPLETE; 555 skb->csum = csum_unfold(~cqe->inet_checksum_value); 556 } else 557 skb->ip_summed = CHECKSUM_UNNECESSARY; 558 559 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]); 560 } 561 562 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, 563 int arr_len, 564 struct ehea_cqe *cqe) 565 { 566 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 567 struct sk_buff *skb; 568 void *pref; 569 int x; 570 571 x = skb_index + 1; 572 x &= (arr_len - 1); 573 574 pref = skb_array[x]; 575 if (pref) { 576 prefetchw(pref); 577 prefetchw(pref + EHEA_CACHE_LINE); 578 579 pref = (skb_array[x]->data); 580 prefetch(pref); 581 prefetch(pref + EHEA_CACHE_LINE); 582 prefetch(pref + EHEA_CACHE_LINE * 2); 583 prefetch(pref + EHEA_CACHE_LINE * 3); 584 } 585 586 skb = skb_array[skb_index]; 587 skb_array[skb_index] = NULL; 588 return skb; 589 } 590 591 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, 592 int arr_len, int wqe_index) 593 { 594 struct sk_buff *skb; 595 void *pref; 596 int x; 597 598 x = wqe_index + 1; 599 x &= (arr_len - 1); 600 601 pref = skb_array[x]; 602 if (pref) { 603 prefetchw(pref); 604 prefetchw(pref + EHEA_CACHE_LINE); 605 606 pref = (skb_array[x]->data); 607 prefetchw(pref); 608 prefetchw(pref + EHEA_CACHE_LINE); 609 } 610 611 skb = skb_array[wqe_index]; 612 skb_array[wqe_index] = NULL; 613 return skb; 614 } 615 616 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, 617 struct ehea_cqe *cqe, int *processed_rq2, 618 int *processed_rq3) 619 { 620 struct sk_buff *skb; 621 622 if (cqe->status & EHEA_CQE_STAT_ERR_TCP) 623 pr->p_stats.err_tcp_cksum++; 624 if (cqe->status & EHEA_CQE_STAT_ERR_IP) 625 pr->p_stats.err_ip_cksum++; 626 if (cqe->status & EHEA_CQE_STAT_ERR_CRC) 627 pr->p_stats.err_frame_crc++; 628 629 if (rq == 2) { 630 *processed_rq2 += 1; 631 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe); 632 dev_kfree_skb(skb); 633 } else if (rq == 3) { 634 *processed_rq3 += 1; 635 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe); 636 dev_kfree_skb(skb); 637 } 638 639 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) { 640 if (netif_msg_rx_err(pr->port)) { 641 pr_err("Critical receive error for QP %d. Resetting port.\n", 642 pr->qp->init_attr.qp_nr); 643 ehea_dump(cqe, sizeof(*cqe), "CQE"); 644 } 645 ehea_schedule_port_reset(pr->port); 646 return 1; 647 } 648 649 return 0; 650 } 651 652 static int ehea_proc_rwqes(struct net_device *dev, 653 struct ehea_port_res *pr, 654 int budget) 655 { 656 struct ehea_port *port = pr->port; 657 struct ehea_qp *qp = pr->qp; 658 struct ehea_cqe *cqe; 659 struct sk_buff *skb; 660 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 661 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; 662 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; 663 int skb_arr_rq1_len = pr->rq1_skba.len; 664 int skb_arr_rq2_len = pr->rq2_skba.len; 665 int skb_arr_rq3_len = pr->rq3_skba.len; 666 int processed, processed_rq1, processed_rq2, processed_rq3; 667 u64 processed_bytes = 0; 668 int wqe_index, last_wqe_index, rq, port_reset; 669 670 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; 671 last_wqe_index = 0; 672 673 cqe = ehea_poll_rq1(qp, &wqe_index); 674 while ((processed < budget) && cqe) { 675 ehea_inc_rq1(qp); 676 processed_rq1++; 677 processed++; 678 if (netif_msg_rx_status(port)) 679 ehea_dump(cqe, sizeof(*cqe), "CQE"); 680 681 last_wqe_index = wqe_index; 682 rmb(); 683 if (!ehea_check_cqe(cqe, &rq)) { 684 if (rq == 1) { 685 /* LL RQ1 */ 686 skb = get_skb_by_index_ll(skb_arr_rq1, 687 skb_arr_rq1_len, 688 wqe_index); 689 if (unlikely(!skb)) { 690 netif_info(port, rx_err, dev, 691 "LL rq1: skb=NULL\n"); 692 693 skb = netdev_alloc_skb(dev, 694 EHEA_L_PKT_SIZE); 695 if (!skb) 696 break; 697 } 698 skb_copy_to_linear_data(skb, ((char *)cqe) + 64, 699 cqe->num_bytes_transfered - 4); 700 ehea_fill_skb(dev, skb, cqe, pr); 701 } else if (rq == 2) { 702 /* RQ2 */ 703 skb = get_skb_by_index(skb_arr_rq2, 704 skb_arr_rq2_len, cqe); 705 if (unlikely(!skb)) { 706 netif_err(port, rx_err, dev, 707 "rq2: skb=NULL\n"); 708 break; 709 } 710 ehea_fill_skb(dev, skb, cqe, pr); 711 processed_rq2++; 712 } else { 713 /* RQ3 */ 714 skb = get_skb_by_index(skb_arr_rq3, 715 skb_arr_rq3_len, cqe); 716 if (unlikely(!skb)) { 717 netif_err(port, rx_err, dev, 718 "rq3: skb=NULL\n"); 719 break; 720 } 721 ehea_fill_skb(dev, skb, cqe, pr); 722 processed_rq3++; 723 } 724 725 processed_bytes += skb->len; 726 727 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 728 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 729 cqe->vlan_tag); 730 731 napi_gro_receive(&pr->napi, skb); 732 } else { 733 pr->p_stats.poll_receive_errors++; 734 port_reset = ehea_treat_poll_error(pr, rq, cqe, 735 &processed_rq2, 736 &processed_rq3); 737 if (port_reset) 738 break; 739 } 740 cqe = ehea_poll_rq1(qp, &wqe_index); 741 } 742 743 pr->rx_packets += processed; 744 pr->rx_bytes += processed_bytes; 745 746 ehea_refill_rq1(pr, last_wqe_index, processed_rq1); 747 ehea_refill_rq2(pr, processed_rq2); 748 ehea_refill_rq3(pr, processed_rq3); 749 750 return processed; 751 } 752 753 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull 754 755 static void reset_sq_restart_flag(struct ehea_port *port) 756 { 757 int i; 758 759 for (i = 0; i < port->num_def_qps; i++) { 760 struct ehea_port_res *pr = &port->port_res[i]; 761 pr->sq_restart_flag = 0; 762 } 763 wake_up(&port->restart_wq); 764 } 765 766 static void check_sqs(struct ehea_port *port) 767 { 768 struct ehea_swqe *swqe; 769 int swqe_index; 770 int i; 771 772 for (i = 0; i < port->num_def_qps; i++) { 773 struct ehea_port_res *pr = &port->port_res[i]; 774 int ret; 775 swqe = ehea_get_swqe(pr->qp, &swqe_index); 776 memset(swqe, 0, SWQE_HEADER_SIZE); 777 atomic_dec(&pr->swqe_avail); 778 779 swqe->tx_control |= EHEA_SWQE_PURGE; 780 swqe->wr_id = SWQE_RESTART_CHECK; 781 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 782 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; 783 swqe->immediate_data_length = 80; 784 785 ehea_post_swqe(pr->qp, swqe); 786 787 ret = wait_event_timeout(port->restart_wq, 788 pr->sq_restart_flag == 0, 789 msecs_to_jiffies(100)); 790 791 if (!ret) { 792 pr_err("HW/SW queues out of sync\n"); 793 ehea_schedule_port_reset(pr->port); 794 return; 795 } 796 } 797 } 798 799 800 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) 801 { 802 struct sk_buff *skb; 803 struct ehea_cq *send_cq = pr->send_cq; 804 struct ehea_cqe *cqe; 805 int quota = my_quota; 806 int cqe_counter = 0; 807 int swqe_av = 0; 808 int index; 809 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, 810 pr - &pr->port->port_res[0]); 811 812 cqe = ehea_poll_cq(send_cq); 813 while (cqe && (quota > 0)) { 814 ehea_inc_cq(send_cq); 815 816 cqe_counter++; 817 rmb(); 818 819 if (cqe->wr_id == SWQE_RESTART_CHECK) { 820 pr->sq_restart_flag = 1; 821 swqe_av++; 822 break; 823 } 824 825 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { 826 pr_err("Bad send completion status=0x%04X\n", 827 cqe->status); 828 829 if (netif_msg_tx_err(pr->port)) 830 ehea_dump(cqe, sizeof(*cqe), "Send CQE"); 831 832 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { 833 pr_err("Resetting port\n"); 834 ehea_schedule_port_reset(pr->port); 835 break; 836 } 837 } 838 839 if (netif_msg_tx_done(pr->port)) 840 ehea_dump(cqe, sizeof(*cqe), "CQE"); 841 842 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) 843 == EHEA_SWQE2_TYPE)) { 844 845 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 846 skb = pr->sq_skba.arr[index]; 847 dev_consume_skb_any(skb); 848 pr->sq_skba.arr[index] = NULL; 849 } 850 851 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); 852 quota--; 853 854 cqe = ehea_poll_cq(send_cq); 855 } 856 857 ehea_update_feca(send_cq, cqe_counter); 858 atomic_add(swqe_av, &pr->swqe_avail); 859 860 if (unlikely(netif_tx_queue_stopped(txq) && 861 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { 862 __netif_tx_lock(txq, smp_processor_id()); 863 if (netif_tx_queue_stopped(txq) && 864 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) 865 netif_tx_wake_queue(txq); 866 __netif_tx_unlock(txq); 867 } 868 869 wake_up(&pr->port->swqe_avail_wq); 870 871 return cqe; 872 } 873 874 #define EHEA_POLL_MAX_CQES 65535 875 876 static int ehea_poll(struct napi_struct *napi, int budget) 877 { 878 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, 879 napi); 880 struct net_device *dev = pr->port->netdev; 881 struct ehea_cqe *cqe; 882 struct ehea_cqe *cqe_skb = NULL; 883 int wqe_index; 884 int rx = 0; 885 886 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 887 rx += ehea_proc_rwqes(dev, pr, budget - rx); 888 889 while (rx != budget) { 890 napi_complete(napi); 891 ehea_reset_cq_ep(pr->recv_cq); 892 ehea_reset_cq_ep(pr->send_cq); 893 ehea_reset_cq_n1(pr->recv_cq); 894 ehea_reset_cq_n1(pr->send_cq); 895 rmb(); 896 cqe = ehea_poll_rq1(pr->qp, &wqe_index); 897 cqe_skb = ehea_poll_cq(pr->send_cq); 898 899 if (!cqe && !cqe_skb) 900 return rx; 901 902 if (!napi_reschedule(napi)) 903 return rx; 904 905 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 906 rx += ehea_proc_rwqes(dev, pr, budget - rx); 907 } 908 909 return rx; 910 } 911 912 static irqreturn_t ehea_recv_irq_handler(int irq, void *param) 913 { 914 struct ehea_port_res *pr = param; 915 916 napi_schedule(&pr->napi); 917 918 return IRQ_HANDLED; 919 } 920 921 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) 922 { 923 struct ehea_port *port = param; 924 struct ehea_eqe *eqe; 925 struct ehea_qp *qp; 926 u32 qp_token; 927 u64 resource_type, aer, aerr; 928 int reset_port = 0; 929 930 eqe = ehea_poll_eq(port->qp_eq); 931 932 while (eqe) { 933 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); 934 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", 935 eqe->entry, qp_token); 936 937 qp = port->port_res[qp_token].qp; 938 939 resource_type = ehea_error_data(port->adapter, qp->fw_handle, 940 &aer, &aerr); 941 942 if (resource_type == EHEA_AER_RESTYPE_QP) { 943 if ((aer & EHEA_AER_RESET_MASK) || 944 (aerr & EHEA_AERR_RESET_MASK)) 945 reset_port = 1; 946 } else 947 reset_port = 1; /* Reset in case of CQ or EQ error */ 948 949 eqe = ehea_poll_eq(port->qp_eq); 950 } 951 952 if (reset_port) { 953 pr_err("Resetting port\n"); 954 ehea_schedule_port_reset(port); 955 } 956 957 return IRQ_HANDLED; 958 } 959 960 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, 961 int logical_port) 962 { 963 int i; 964 965 for (i = 0; i < EHEA_MAX_PORTS; i++) 966 if (adapter->port[i]) 967 if (adapter->port[i]->logical_port_id == logical_port) 968 return adapter->port[i]; 969 return NULL; 970 } 971 972 int ehea_sense_port_attr(struct ehea_port *port) 973 { 974 int ret; 975 u64 hret; 976 struct hcp_ehea_port_cb0 *cb0; 977 978 /* may be called via ehea_neq_tasklet() */ 979 cb0 = (void *)get_zeroed_page(GFP_ATOMIC); 980 if (!cb0) { 981 pr_err("no mem for cb0\n"); 982 ret = -ENOMEM; 983 goto out; 984 } 985 986 hret = ehea_h_query_ehea_port(port->adapter->handle, 987 port->logical_port_id, H_PORT_CB0, 988 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), 989 cb0); 990 if (hret != H_SUCCESS) { 991 ret = -EIO; 992 goto out_free; 993 } 994 995 /* MAC address */ 996 port->mac_addr = cb0->port_mac_addr << 16; 997 998 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { 999 ret = -EADDRNOTAVAIL; 1000 goto out_free; 1001 } 1002 1003 /* Port speed */ 1004 switch (cb0->port_speed) { 1005 case H_SPEED_10M_H: 1006 port->port_speed = EHEA_SPEED_10M; 1007 port->full_duplex = 0; 1008 break; 1009 case H_SPEED_10M_F: 1010 port->port_speed = EHEA_SPEED_10M; 1011 port->full_duplex = 1; 1012 break; 1013 case H_SPEED_100M_H: 1014 port->port_speed = EHEA_SPEED_100M; 1015 port->full_duplex = 0; 1016 break; 1017 case H_SPEED_100M_F: 1018 port->port_speed = EHEA_SPEED_100M; 1019 port->full_duplex = 1; 1020 break; 1021 case H_SPEED_1G_F: 1022 port->port_speed = EHEA_SPEED_1G; 1023 port->full_duplex = 1; 1024 break; 1025 case H_SPEED_10G_F: 1026 port->port_speed = EHEA_SPEED_10G; 1027 port->full_duplex = 1; 1028 break; 1029 default: 1030 port->port_speed = 0; 1031 port->full_duplex = 0; 1032 break; 1033 } 1034 1035 port->autoneg = 1; 1036 port->num_mcs = cb0->num_default_qps; 1037 1038 /* Number of default QPs */ 1039 if (use_mcs) 1040 port->num_def_qps = cb0->num_default_qps; 1041 else 1042 port->num_def_qps = 1; 1043 1044 if (!port->num_def_qps) { 1045 ret = -EINVAL; 1046 goto out_free; 1047 } 1048 1049 ret = 0; 1050 out_free: 1051 if (ret || netif_msg_probe(port)) 1052 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); 1053 free_page((unsigned long)cb0); 1054 out: 1055 return ret; 1056 } 1057 1058 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) 1059 { 1060 struct hcp_ehea_port_cb4 *cb4; 1061 u64 hret; 1062 int ret = 0; 1063 1064 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 1065 if (!cb4) { 1066 pr_err("no mem for cb4\n"); 1067 ret = -ENOMEM; 1068 goto out; 1069 } 1070 1071 cb4->port_speed = port_speed; 1072 1073 netif_carrier_off(port->netdev); 1074 1075 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1076 port->logical_port_id, 1077 H_PORT_CB4, H_PORT_CB4_SPEED, cb4); 1078 if (hret == H_SUCCESS) { 1079 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; 1080 1081 hret = ehea_h_query_ehea_port(port->adapter->handle, 1082 port->logical_port_id, 1083 H_PORT_CB4, H_PORT_CB4_SPEED, 1084 cb4); 1085 if (hret == H_SUCCESS) { 1086 switch (cb4->port_speed) { 1087 case H_SPEED_10M_H: 1088 port->port_speed = EHEA_SPEED_10M; 1089 port->full_duplex = 0; 1090 break; 1091 case H_SPEED_10M_F: 1092 port->port_speed = EHEA_SPEED_10M; 1093 port->full_duplex = 1; 1094 break; 1095 case H_SPEED_100M_H: 1096 port->port_speed = EHEA_SPEED_100M; 1097 port->full_duplex = 0; 1098 break; 1099 case H_SPEED_100M_F: 1100 port->port_speed = EHEA_SPEED_100M; 1101 port->full_duplex = 1; 1102 break; 1103 case H_SPEED_1G_F: 1104 port->port_speed = EHEA_SPEED_1G; 1105 port->full_duplex = 1; 1106 break; 1107 case H_SPEED_10G_F: 1108 port->port_speed = EHEA_SPEED_10G; 1109 port->full_duplex = 1; 1110 break; 1111 default: 1112 port->port_speed = 0; 1113 port->full_duplex = 0; 1114 break; 1115 } 1116 } else { 1117 pr_err("Failed sensing port speed\n"); 1118 ret = -EIO; 1119 } 1120 } else { 1121 if (hret == H_AUTHORITY) { 1122 pr_info("Hypervisor denied setting port speed\n"); 1123 ret = -EPERM; 1124 } else { 1125 ret = -EIO; 1126 pr_err("Failed setting port speed\n"); 1127 } 1128 } 1129 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) 1130 netif_carrier_on(port->netdev); 1131 1132 free_page((unsigned long)cb4); 1133 out: 1134 return ret; 1135 } 1136 1137 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) 1138 { 1139 int ret; 1140 u8 ec; 1141 u8 portnum; 1142 struct ehea_port *port; 1143 struct net_device *dev; 1144 1145 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); 1146 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); 1147 port = ehea_get_port(adapter, portnum); 1148 if (!port) { 1149 netdev_err(NULL, "unknown portnum %x\n", portnum); 1150 return; 1151 } 1152 dev = port->netdev; 1153 1154 switch (ec) { 1155 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1156 1157 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1158 if (!netif_carrier_ok(dev)) { 1159 ret = ehea_sense_port_attr(port); 1160 if (ret) { 1161 netdev_err(dev, "failed resensing port attributes\n"); 1162 break; 1163 } 1164 1165 netif_info(port, link, dev, 1166 "Logical port up: %dMbps %s Duplex\n", 1167 port->port_speed, 1168 port->full_duplex == 1 ? 1169 "Full" : "Half"); 1170 1171 netif_carrier_on(dev); 1172 netif_wake_queue(dev); 1173 } 1174 } else 1175 if (netif_carrier_ok(dev)) { 1176 netif_info(port, link, dev, 1177 "Logical port down\n"); 1178 netif_carrier_off(dev); 1179 netif_tx_disable(dev); 1180 } 1181 1182 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1183 port->phy_link = EHEA_PHY_LINK_UP; 1184 netif_info(port, link, dev, 1185 "Physical port up\n"); 1186 if (prop_carrier_state) 1187 netif_carrier_on(dev); 1188 } else { 1189 port->phy_link = EHEA_PHY_LINK_DOWN; 1190 netif_info(port, link, dev, 1191 "Physical port down\n"); 1192 if (prop_carrier_state) 1193 netif_carrier_off(dev); 1194 } 1195 1196 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1197 netdev_info(dev, 1198 "External switch port is primary port\n"); 1199 else 1200 netdev_info(dev, 1201 "External switch port is backup port\n"); 1202 1203 break; 1204 case EHEA_EC_ADAPTER_MALFUNC: 1205 netdev_err(dev, "Adapter malfunction\n"); 1206 break; 1207 case EHEA_EC_PORT_MALFUNC: 1208 netdev_info(dev, "Port malfunction\n"); 1209 netif_carrier_off(dev); 1210 netif_tx_disable(dev); 1211 break; 1212 default: 1213 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1214 break; 1215 } 1216 } 1217 1218 static void ehea_neq_tasklet(struct tasklet_struct *t) 1219 { 1220 struct ehea_adapter *adapter = from_tasklet(adapter, t, neq_tasklet); 1221 struct ehea_eqe *eqe; 1222 u64 event_mask; 1223 1224 eqe = ehea_poll_eq(adapter->neq); 1225 pr_debug("eqe=%p\n", eqe); 1226 1227 while (eqe) { 1228 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1229 ehea_parse_eqe(adapter, eqe->entry); 1230 eqe = ehea_poll_eq(adapter->neq); 1231 pr_debug("next eqe=%p\n", eqe); 1232 } 1233 1234 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1235 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1236 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1237 1238 ehea_h_reset_events(adapter->handle, 1239 adapter->neq->fw_handle, event_mask); 1240 } 1241 1242 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1243 { 1244 struct ehea_adapter *adapter = param; 1245 tasklet_hi_schedule(&adapter->neq_tasklet); 1246 return IRQ_HANDLED; 1247 } 1248 1249 1250 static int ehea_fill_port_res(struct ehea_port_res *pr) 1251 { 1252 int ret; 1253 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1254 1255 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1256 1257 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1258 1259 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1260 1261 return ret; 1262 } 1263 1264 static int ehea_reg_interrupts(struct net_device *dev) 1265 { 1266 struct ehea_port *port = netdev_priv(dev); 1267 struct ehea_port_res *pr; 1268 int i, ret; 1269 1270 1271 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1272 dev->name); 1273 1274 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1275 ehea_qp_aff_irq_handler, 1276 0, port->int_aff_name, port); 1277 if (ret) { 1278 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1279 port->qp_eq->attr.ist1); 1280 goto out_free_qpeq; 1281 } 1282 1283 netif_info(port, ifup, dev, 1284 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1285 port->qp_eq->attr.ist1); 1286 1287 1288 for (i = 0; i < port->num_def_qps; i++) { 1289 pr = &port->port_res[i]; 1290 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1291 "%s-queue%d", dev->name, i); 1292 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1293 ehea_recv_irq_handler, 1294 0, pr->int_send_name, pr); 1295 if (ret) { 1296 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1297 i, pr->eq->attr.ist1); 1298 goto out_free_req; 1299 } 1300 netif_info(port, ifup, dev, 1301 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1302 pr->eq->attr.ist1, i); 1303 } 1304 out: 1305 return ret; 1306 1307 1308 out_free_req: 1309 while (--i >= 0) { 1310 u32 ist = port->port_res[i].eq->attr.ist1; 1311 ibmebus_free_irq(ist, &port->port_res[i]); 1312 } 1313 1314 out_free_qpeq: 1315 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1316 i = port->num_def_qps; 1317 1318 goto out; 1319 1320 } 1321 1322 static void ehea_free_interrupts(struct net_device *dev) 1323 { 1324 struct ehea_port *port = netdev_priv(dev); 1325 struct ehea_port_res *pr; 1326 int i; 1327 1328 /* send */ 1329 1330 for (i = 0; i < port->num_def_qps; i++) { 1331 pr = &port->port_res[i]; 1332 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1333 netif_info(port, intr, dev, 1334 "free send irq for res %d with handle 0x%X\n", 1335 i, pr->eq->attr.ist1); 1336 } 1337 1338 /* associated events */ 1339 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1340 netif_info(port, intr, dev, 1341 "associated event interrupt for handle 0x%X freed\n", 1342 port->qp_eq->attr.ist1); 1343 } 1344 1345 static int ehea_configure_port(struct ehea_port *port) 1346 { 1347 int ret, i; 1348 u64 hret, mask; 1349 struct hcp_ehea_port_cb0 *cb0; 1350 1351 ret = -ENOMEM; 1352 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1353 if (!cb0) 1354 goto out; 1355 1356 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1357 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1358 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1359 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1360 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1361 PXLY_RC_VLAN_FILTER) 1362 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1363 1364 for (i = 0; i < port->num_mcs; i++) 1365 if (use_mcs) 1366 cb0->default_qpn_arr[i] = 1367 port->port_res[i].qp->init_attr.qp_nr; 1368 else 1369 cb0->default_qpn_arr[i] = 1370 port->port_res[0].qp->init_attr.qp_nr; 1371 1372 if (netif_msg_ifup(port)) 1373 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1374 1375 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1376 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1377 1378 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1379 port->logical_port_id, 1380 H_PORT_CB0, mask, cb0); 1381 ret = -EIO; 1382 if (hret != H_SUCCESS) 1383 goto out_free; 1384 1385 ret = 0; 1386 1387 out_free: 1388 free_page((unsigned long)cb0); 1389 out: 1390 return ret; 1391 } 1392 1393 static int ehea_gen_smrs(struct ehea_port_res *pr) 1394 { 1395 int ret; 1396 struct ehea_adapter *adapter = pr->port->adapter; 1397 1398 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1399 if (ret) 1400 goto out; 1401 1402 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1403 if (ret) 1404 goto out_free; 1405 1406 return 0; 1407 1408 out_free: 1409 ehea_rem_mr(&pr->send_mr); 1410 out: 1411 pr_err("Generating SMRS failed\n"); 1412 return -EIO; 1413 } 1414 1415 static int ehea_rem_smrs(struct ehea_port_res *pr) 1416 { 1417 if ((ehea_rem_mr(&pr->send_mr)) || 1418 (ehea_rem_mr(&pr->recv_mr))) 1419 return -EIO; 1420 else 1421 return 0; 1422 } 1423 1424 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1425 { 1426 int arr_size = sizeof(void *) * max_q_entries; 1427 1428 q_skba->arr = vzalloc(arr_size); 1429 if (!q_skba->arr) 1430 return -ENOMEM; 1431 1432 q_skba->len = max_q_entries; 1433 q_skba->index = 0; 1434 q_skba->os_skbs = 0; 1435 1436 return 0; 1437 } 1438 1439 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1440 struct port_res_cfg *pr_cfg, int queue_token) 1441 { 1442 struct ehea_adapter *adapter = port->adapter; 1443 enum ehea_eq_type eq_type = EHEA_EQ; 1444 struct ehea_qp_init_attr *init_attr = NULL; 1445 int ret = -EIO; 1446 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1447 1448 tx_bytes = pr->tx_bytes; 1449 tx_packets = pr->tx_packets; 1450 rx_bytes = pr->rx_bytes; 1451 rx_packets = pr->rx_packets; 1452 1453 memset(pr, 0, sizeof(struct ehea_port_res)); 1454 1455 pr->tx_bytes = tx_bytes; 1456 pr->tx_packets = tx_packets; 1457 pr->rx_bytes = rx_bytes; 1458 pr->rx_packets = rx_packets; 1459 1460 pr->port = port; 1461 1462 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1463 if (!pr->eq) { 1464 pr_err("create_eq failed (eq)\n"); 1465 goto out_free; 1466 } 1467 1468 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1469 pr->eq->fw_handle, 1470 port->logical_port_id); 1471 if (!pr->recv_cq) { 1472 pr_err("create_cq failed (cq_recv)\n"); 1473 goto out_free; 1474 } 1475 1476 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1477 pr->eq->fw_handle, 1478 port->logical_port_id); 1479 if (!pr->send_cq) { 1480 pr_err("create_cq failed (cq_send)\n"); 1481 goto out_free; 1482 } 1483 1484 if (netif_msg_ifup(port)) 1485 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1486 pr->send_cq->attr.act_nr_of_cqes, 1487 pr->recv_cq->attr.act_nr_of_cqes); 1488 1489 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1490 if (!init_attr) { 1491 ret = -ENOMEM; 1492 pr_err("no mem for ehea_qp_init_attr\n"); 1493 goto out_free; 1494 } 1495 1496 init_attr->low_lat_rq1 = 1; 1497 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1498 init_attr->rq_count = 3; 1499 init_attr->qp_token = queue_token; 1500 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1501 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1502 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1503 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1504 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1505 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1506 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1507 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1508 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1509 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1510 init_attr->port_nr = port->logical_port_id; 1511 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1512 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1513 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1514 1515 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1516 if (!pr->qp) { 1517 pr_err("create_qp failed\n"); 1518 ret = -EIO; 1519 goto out_free; 1520 } 1521 1522 if (netif_msg_ifup(port)) 1523 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", 1524 init_attr->qp_nr, 1525 init_attr->act_nr_send_wqes, 1526 init_attr->act_nr_rwqes_rq1, 1527 init_attr->act_nr_rwqes_rq2, 1528 init_attr->act_nr_rwqes_rq3); 1529 1530 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1531 1532 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1533 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1534 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1535 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1536 if (ret) 1537 goto out_free; 1538 1539 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1540 if (ehea_gen_smrs(pr) != 0) { 1541 ret = -EIO; 1542 goto out_free; 1543 } 1544 1545 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1546 1547 kfree(init_attr); 1548 1549 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll); 1550 1551 ret = 0; 1552 goto out; 1553 1554 out_free: 1555 kfree(init_attr); 1556 vfree(pr->sq_skba.arr); 1557 vfree(pr->rq1_skba.arr); 1558 vfree(pr->rq2_skba.arr); 1559 vfree(pr->rq3_skba.arr); 1560 ehea_destroy_qp(pr->qp); 1561 ehea_destroy_cq(pr->send_cq); 1562 ehea_destroy_cq(pr->recv_cq); 1563 ehea_destroy_eq(pr->eq); 1564 out: 1565 return ret; 1566 } 1567 1568 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1569 { 1570 int ret, i; 1571 1572 if (pr->qp) 1573 netif_napi_del(&pr->napi); 1574 1575 ret = ehea_destroy_qp(pr->qp); 1576 1577 if (!ret) { 1578 ehea_destroy_cq(pr->send_cq); 1579 ehea_destroy_cq(pr->recv_cq); 1580 ehea_destroy_eq(pr->eq); 1581 1582 for (i = 0; i < pr->rq1_skba.len; i++) 1583 dev_kfree_skb(pr->rq1_skba.arr[i]); 1584 1585 for (i = 0; i < pr->rq2_skba.len; i++) 1586 dev_kfree_skb(pr->rq2_skba.arr[i]); 1587 1588 for (i = 0; i < pr->rq3_skba.len; i++) 1589 dev_kfree_skb(pr->rq3_skba.arr[i]); 1590 1591 for (i = 0; i < pr->sq_skba.len; i++) 1592 dev_kfree_skb(pr->sq_skba.arr[i]); 1593 1594 vfree(pr->rq1_skba.arr); 1595 vfree(pr->rq2_skba.arr); 1596 vfree(pr->rq3_skba.arr); 1597 vfree(pr->sq_skba.arr); 1598 ret = ehea_rem_smrs(pr); 1599 } 1600 return ret; 1601 } 1602 1603 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1604 u32 lkey) 1605 { 1606 int skb_data_size = skb_headlen(skb); 1607 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1608 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1609 unsigned int immediate_len = SWQE2_MAX_IMM; 1610 1611 swqe->descriptors = 0; 1612 1613 if (skb_is_gso(skb)) { 1614 swqe->tx_control |= EHEA_SWQE_TSO; 1615 swqe->mss = skb_shinfo(skb)->gso_size; 1616 /* 1617 * For TSO packets we only copy the headers into the 1618 * immediate area. 1619 */ 1620 immediate_len = skb_tcp_all_headers(skb); 1621 } 1622 1623 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1624 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1625 swqe->immediate_data_length = immediate_len; 1626 1627 if (skb_data_size > immediate_len) { 1628 sg1entry->l_key = lkey; 1629 sg1entry->len = skb_data_size - immediate_len; 1630 sg1entry->vaddr = 1631 ehea_map_vaddr(skb->data + immediate_len); 1632 swqe->descriptors++; 1633 } 1634 } else { 1635 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1636 swqe->immediate_data_length = skb_data_size; 1637 } 1638 } 1639 1640 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1641 struct ehea_swqe *swqe, u32 lkey) 1642 { 1643 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1644 skb_frag_t *frag; 1645 int nfrags, sg1entry_contains_frag_data, i; 1646 1647 nfrags = skb_shinfo(skb)->nr_frags; 1648 sg1entry = &swqe->u.immdata_desc.sg_entry; 1649 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1650 sg1entry_contains_frag_data = 0; 1651 1652 write_swqe2_immediate(skb, swqe, lkey); 1653 1654 /* write descriptors */ 1655 if (nfrags > 0) { 1656 if (swqe->descriptors == 0) { 1657 /* sg1entry not yet used */ 1658 frag = &skb_shinfo(skb)->frags[0]; 1659 1660 /* copy sg1entry data */ 1661 sg1entry->l_key = lkey; 1662 sg1entry->len = skb_frag_size(frag); 1663 sg1entry->vaddr = 1664 ehea_map_vaddr(skb_frag_address(frag)); 1665 swqe->descriptors++; 1666 sg1entry_contains_frag_data = 1; 1667 } 1668 1669 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1670 1671 frag = &skb_shinfo(skb)->frags[i]; 1672 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1673 1674 sgentry->l_key = lkey; 1675 sgentry->len = skb_frag_size(frag); 1676 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1677 swqe->descriptors++; 1678 } 1679 } 1680 } 1681 1682 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1683 { 1684 int ret = 0; 1685 u64 hret; 1686 u8 reg_type; 1687 1688 /* De/Register untagged packets */ 1689 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1690 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1691 port->logical_port_id, 1692 reg_type, port->mac_addr, 0, hcallid); 1693 if (hret != H_SUCCESS) { 1694 pr_err("%sregistering bc address failed (tagged)\n", 1695 hcallid == H_REG_BCMC ? "" : "de"); 1696 ret = -EIO; 1697 goto out_herr; 1698 } 1699 1700 /* De/Register VLAN packets */ 1701 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1702 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1703 port->logical_port_id, 1704 reg_type, port->mac_addr, 0, hcallid); 1705 if (hret != H_SUCCESS) { 1706 pr_err("%sregistering bc address failed (vlan)\n", 1707 hcallid == H_REG_BCMC ? "" : "de"); 1708 ret = -EIO; 1709 } 1710 out_herr: 1711 return ret; 1712 } 1713 1714 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1715 { 1716 struct ehea_port *port = netdev_priv(dev); 1717 struct sockaddr *mac_addr = sa; 1718 struct hcp_ehea_port_cb0 *cb0; 1719 int ret; 1720 u64 hret; 1721 1722 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1723 ret = -EADDRNOTAVAIL; 1724 goto out; 1725 } 1726 1727 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1728 if (!cb0) { 1729 pr_err("no mem for cb0\n"); 1730 ret = -ENOMEM; 1731 goto out; 1732 } 1733 1734 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1735 1736 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1737 1738 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1739 port->logical_port_id, H_PORT_CB0, 1740 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1741 if (hret != H_SUCCESS) { 1742 ret = -EIO; 1743 goto out_free; 1744 } 1745 1746 eth_hw_addr_set(dev, mac_addr->sa_data); 1747 1748 /* Deregister old MAC in pHYP */ 1749 if (port->state == EHEA_PORT_UP) { 1750 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1751 if (ret) 1752 goto out_upregs; 1753 } 1754 1755 port->mac_addr = cb0->port_mac_addr << 16; 1756 1757 /* Register new MAC in pHYP */ 1758 if (port->state == EHEA_PORT_UP) { 1759 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1760 if (ret) 1761 goto out_upregs; 1762 } 1763 1764 ret = 0; 1765 1766 out_upregs: 1767 ehea_update_bcmc_registrations(); 1768 out_free: 1769 free_page((unsigned long)cb0); 1770 out: 1771 return ret; 1772 } 1773 1774 static void ehea_promiscuous_error(u64 hret, int enable) 1775 { 1776 if (hret == H_AUTHORITY) 1777 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1778 enable == 1 ? "en" : "dis"); 1779 else 1780 pr_err("failed %sabling promiscuous mode\n", 1781 enable == 1 ? "en" : "dis"); 1782 } 1783 1784 static void ehea_promiscuous(struct net_device *dev, int enable) 1785 { 1786 struct ehea_port *port = netdev_priv(dev); 1787 struct hcp_ehea_port_cb7 *cb7; 1788 u64 hret; 1789 1790 if (enable == port->promisc) 1791 return; 1792 1793 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1794 if (!cb7) { 1795 pr_err("no mem for cb7\n"); 1796 goto out; 1797 } 1798 1799 /* Modify Pxs_DUCQPN in CB7 */ 1800 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1801 1802 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1803 port->logical_port_id, 1804 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1805 if (hret) { 1806 ehea_promiscuous_error(hret, enable); 1807 goto out; 1808 } 1809 1810 port->promisc = enable; 1811 out: 1812 free_page((unsigned long)cb7); 1813 } 1814 1815 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1816 u32 hcallid) 1817 { 1818 u64 hret; 1819 u8 reg_type; 1820 1821 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; 1822 if (mc_mac_addr == 0) 1823 reg_type |= EHEA_BCMC_SCOPE_ALL; 1824 1825 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1826 port->logical_port_id, 1827 reg_type, mc_mac_addr, 0, hcallid); 1828 if (hret) 1829 goto out; 1830 1831 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL; 1832 if (mc_mac_addr == 0) 1833 reg_type |= EHEA_BCMC_SCOPE_ALL; 1834 1835 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1836 port->logical_port_id, 1837 reg_type, mc_mac_addr, 0, hcallid); 1838 out: 1839 return hret; 1840 } 1841 1842 static int ehea_drop_multicast_list(struct net_device *dev) 1843 { 1844 struct ehea_port *port = netdev_priv(dev); 1845 struct ehea_mc_list *mc_entry = port->mc_list; 1846 struct list_head *pos; 1847 struct list_head *temp; 1848 int ret = 0; 1849 u64 hret; 1850 1851 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1852 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1853 1854 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1855 H_DEREG_BCMC); 1856 if (hret) { 1857 pr_err("failed deregistering mcast MAC\n"); 1858 ret = -EIO; 1859 } 1860 1861 list_del(pos); 1862 kfree(mc_entry); 1863 } 1864 return ret; 1865 } 1866 1867 static void ehea_allmulti(struct net_device *dev, int enable) 1868 { 1869 struct ehea_port *port = netdev_priv(dev); 1870 u64 hret; 1871 1872 if (!port->allmulti) { 1873 if (enable) { 1874 /* Enable ALLMULTI */ 1875 ehea_drop_multicast_list(dev); 1876 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1877 if (!hret) 1878 port->allmulti = 1; 1879 else 1880 netdev_err(dev, 1881 "failed enabling IFF_ALLMULTI\n"); 1882 } 1883 } else { 1884 if (!enable) { 1885 /* Disable ALLMULTI */ 1886 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1887 if (!hret) 1888 port->allmulti = 0; 1889 else 1890 netdev_err(dev, 1891 "failed disabling IFF_ALLMULTI\n"); 1892 } 1893 } 1894 } 1895 1896 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1897 { 1898 struct ehea_mc_list *ehea_mcl_entry; 1899 u64 hret; 1900 1901 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1902 if (!ehea_mcl_entry) 1903 return; 1904 1905 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1906 1907 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1908 1909 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1910 H_REG_BCMC); 1911 if (!hret) 1912 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1913 else { 1914 pr_err("failed registering mcast MAC\n"); 1915 kfree(ehea_mcl_entry); 1916 } 1917 } 1918 1919 static void ehea_set_multicast_list(struct net_device *dev) 1920 { 1921 struct ehea_port *port = netdev_priv(dev); 1922 struct netdev_hw_addr *ha; 1923 int ret; 1924 1925 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC)); 1926 1927 if (dev->flags & IFF_ALLMULTI) { 1928 ehea_allmulti(dev, 1); 1929 goto out; 1930 } 1931 ehea_allmulti(dev, 0); 1932 1933 if (!netdev_mc_empty(dev)) { 1934 ret = ehea_drop_multicast_list(dev); 1935 if (ret) { 1936 /* Dropping the current multicast list failed. 1937 * Enabling ALL_MULTI is the best we can do. 1938 */ 1939 ehea_allmulti(dev, 1); 1940 } 1941 1942 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1943 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1944 port->adapter->max_mc_mac); 1945 goto out; 1946 } 1947 1948 netdev_for_each_mc_addr(ha, dev) 1949 ehea_add_multicast_entry(port, ha->addr); 1950 1951 } 1952 out: 1953 ehea_update_bcmc_registrations(); 1954 } 1955 1956 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1957 { 1958 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1959 1960 if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 1961 return; 1962 1963 if (skb->ip_summed == CHECKSUM_PARTIAL) 1964 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 1965 1966 swqe->ip_start = skb_network_offset(skb); 1967 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 1968 1969 switch (ip_hdr(skb)->protocol) { 1970 case IPPROTO_UDP: 1971 if (skb->ip_summed == CHECKSUM_PARTIAL) 1972 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1973 1974 swqe->tcp_offset = swqe->ip_end + 1 + 1975 offsetof(struct udphdr, check); 1976 break; 1977 1978 case IPPROTO_TCP: 1979 if (skb->ip_summed == CHECKSUM_PARTIAL) 1980 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1981 1982 swqe->tcp_offset = swqe->ip_end + 1 + 1983 offsetof(struct tcphdr, check); 1984 break; 1985 } 1986 } 1987 1988 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 1989 struct ehea_swqe *swqe, u32 lkey) 1990 { 1991 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 1992 1993 xmit_common(skb, swqe); 1994 1995 write_swqe2_data(skb, dev, swqe, lkey); 1996 } 1997 1998 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 1999 struct ehea_swqe *swqe) 2000 { 2001 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 2002 2003 xmit_common(skb, swqe); 2004 2005 if (!skb->data_len) 2006 skb_copy_from_linear_data(skb, imm_data, skb->len); 2007 else 2008 skb_copy_bits(skb, 0, imm_data, skb->len); 2009 2010 swqe->immediate_data_length = skb->len; 2011 dev_consume_skb_any(skb); 2012 } 2013 2014 static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2015 { 2016 struct ehea_port *port = netdev_priv(dev); 2017 struct ehea_swqe *swqe; 2018 u32 lkey; 2019 int swqe_index; 2020 struct ehea_port_res *pr; 2021 struct netdev_queue *txq; 2022 2023 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2024 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2025 2026 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2027 memset(swqe, 0, SWQE_HEADER_SIZE); 2028 atomic_dec(&pr->swqe_avail); 2029 2030 if (skb_vlan_tag_present(skb)) { 2031 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2032 swqe->vlan_tag = skb_vlan_tag_get(skb); 2033 } 2034 2035 pr->tx_packets++; 2036 pr->tx_bytes += skb->len; 2037 2038 if (skb->len <= SWQE3_MAX_IMM) { 2039 u32 sig_iv = port->sig_comp_iv; 2040 u32 swqe_num = pr->swqe_id_counter; 2041 ehea_xmit3(skb, dev, swqe); 2042 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2043 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2044 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2045 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2046 sig_iv); 2047 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2048 pr->swqe_ll_count = 0; 2049 } else 2050 pr->swqe_ll_count += 1; 2051 } else { 2052 swqe->wr_id = 2053 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2054 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2055 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2056 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2057 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2058 2059 pr->sq_skba.index++; 2060 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2061 2062 lkey = pr->send_mr.lkey; 2063 ehea_xmit2(skb, dev, swqe, lkey); 2064 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2065 } 2066 pr->swqe_id_counter += 1; 2067 2068 netif_info(port, tx_queued, dev, 2069 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2070 if (netif_msg_tx_queued(port)) 2071 ehea_dump(swqe, 512, "swqe"); 2072 2073 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2074 netif_tx_stop_queue(txq); 2075 swqe->tx_control |= EHEA_SWQE_PURGE; 2076 } 2077 2078 ehea_post_swqe(pr->qp, swqe); 2079 2080 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2081 pr->p_stats.queue_stopped++; 2082 netif_tx_stop_queue(txq); 2083 } 2084 2085 return NETDEV_TX_OK; 2086 } 2087 2088 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2089 { 2090 struct ehea_port *port = netdev_priv(dev); 2091 struct ehea_adapter *adapter = port->adapter; 2092 struct hcp_ehea_port_cb1 *cb1; 2093 int index; 2094 u64 hret; 2095 int err = 0; 2096 2097 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2098 if (!cb1) { 2099 pr_err("no mem for cb1\n"); 2100 err = -ENOMEM; 2101 goto out; 2102 } 2103 2104 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2105 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2106 if (hret != H_SUCCESS) { 2107 pr_err("query_ehea_port failed\n"); 2108 err = -EINVAL; 2109 goto out; 2110 } 2111 2112 index = (vid / 64); 2113 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2114 2115 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2116 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2117 if (hret != H_SUCCESS) { 2118 pr_err("modify_ehea_port failed\n"); 2119 err = -EINVAL; 2120 } 2121 out: 2122 free_page((unsigned long)cb1); 2123 return err; 2124 } 2125 2126 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2127 { 2128 struct ehea_port *port = netdev_priv(dev); 2129 struct ehea_adapter *adapter = port->adapter; 2130 struct hcp_ehea_port_cb1 *cb1; 2131 int index; 2132 u64 hret; 2133 int err = 0; 2134 2135 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2136 if (!cb1) { 2137 pr_err("no mem for cb1\n"); 2138 err = -ENOMEM; 2139 goto out; 2140 } 2141 2142 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2143 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2144 if (hret != H_SUCCESS) { 2145 pr_err("query_ehea_port failed\n"); 2146 err = -EINVAL; 2147 goto out; 2148 } 2149 2150 index = (vid / 64); 2151 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2152 2153 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2154 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2155 if (hret != H_SUCCESS) { 2156 pr_err("modify_ehea_port failed\n"); 2157 err = -EINVAL; 2158 } 2159 out: 2160 free_page((unsigned long)cb1); 2161 return err; 2162 } 2163 2164 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2165 { 2166 int ret = -EIO; 2167 u64 hret; 2168 u16 dummy16 = 0; 2169 u64 dummy64 = 0; 2170 struct hcp_modify_qp_cb0 *cb0; 2171 2172 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2173 if (!cb0) { 2174 ret = -ENOMEM; 2175 goto out; 2176 } 2177 2178 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2179 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2180 if (hret != H_SUCCESS) { 2181 pr_err("query_ehea_qp failed (1)\n"); 2182 goto out; 2183 } 2184 2185 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2186 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2187 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2188 &dummy64, &dummy64, &dummy16, &dummy16); 2189 if (hret != H_SUCCESS) { 2190 pr_err("modify_ehea_qp failed (1)\n"); 2191 goto out; 2192 } 2193 2194 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2195 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2196 if (hret != H_SUCCESS) { 2197 pr_err("query_ehea_qp failed (2)\n"); 2198 goto out; 2199 } 2200 2201 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2202 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2203 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2204 &dummy64, &dummy64, &dummy16, &dummy16); 2205 if (hret != H_SUCCESS) { 2206 pr_err("modify_ehea_qp failed (2)\n"); 2207 goto out; 2208 } 2209 2210 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2211 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2212 if (hret != H_SUCCESS) { 2213 pr_err("query_ehea_qp failed (3)\n"); 2214 goto out; 2215 } 2216 2217 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2218 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2219 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2220 &dummy64, &dummy64, &dummy16, &dummy16); 2221 if (hret != H_SUCCESS) { 2222 pr_err("modify_ehea_qp failed (3)\n"); 2223 goto out; 2224 } 2225 2226 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2227 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2228 if (hret != H_SUCCESS) { 2229 pr_err("query_ehea_qp failed (4)\n"); 2230 goto out; 2231 } 2232 2233 ret = 0; 2234 out: 2235 free_page((unsigned long)cb0); 2236 return ret; 2237 } 2238 2239 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2240 { 2241 int ret, i; 2242 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2243 enum ehea_eq_type eq_type = EHEA_EQ; 2244 2245 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2246 EHEA_MAX_ENTRIES_EQ, 1); 2247 if (!port->qp_eq) { 2248 ret = -EINVAL; 2249 pr_err("ehea_create_eq failed (qp_eq)\n"); 2250 goto out_kill_eq; 2251 } 2252 2253 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2254 pr_cfg.max_entries_scq = sq_entries * 2; 2255 pr_cfg.max_entries_sq = sq_entries; 2256 pr_cfg.max_entries_rq1 = rq1_entries; 2257 pr_cfg.max_entries_rq2 = rq2_entries; 2258 pr_cfg.max_entries_rq3 = rq3_entries; 2259 2260 pr_cfg_small_rx.max_entries_rcq = 1; 2261 pr_cfg_small_rx.max_entries_scq = sq_entries; 2262 pr_cfg_small_rx.max_entries_sq = sq_entries; 2263 pr_cfg_small_rx.max_entries_rq1 = 1; 2264 pr_cfg_small_rx.max_entries_rq2 = 1; 2265 pr_cfg_small_rx.max_entries_rq3 = 1; 2266 2267 for (i = 0; i < def_qps; i++) { 2268 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2269 if (ret) 2270 goto out_clean_pr; 2271 } 2272 for (i = def_qps; i < def_qps; i++) { 2273 ret = ehea_init_port_res(port, &port->port_res[i], 2274 &pr_cfg_small_rx, i); 2275 if (ret) 2276 goto out_clean_pr; 2277 } 2278 2279 return 0; 2280 2281 out_clean_pr: 2282 while (--i >= 0) 2283 ehea_clean_portres(port, &port->port_res[i]); 2284 2285 out_kill_eq: 2286 ehea_destroy_eq(port->qp_eq); 2287 return ret; 2288 } 2289 2290 static int ehea_clean_all_portres(struct ehea_port *port) 2291 { 2292 int ret = 0; 2293 int i; 2294 2295 for (i = 0; i < port->num_def_qps; i++) 2296 ret |= ehea_clean_portres(port, &port->port_res[i]); 2297 2298 ret |= ehea_destroy_eq(port->qp_eq); 2299 2300 return ret; 2301 } 2302 2303 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2304 { 2305 if (adapter->active_ports) 2306 return; 2307 2308 ehea_rem_mr(&adapter->mr); 2309 } 2310 2311 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2312 { 2313 if (adapter->active_ports) 2314 return 0; 2315 2316 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2317 } 2318 2319 static int ehea_up(struct net_device *dev) 2320 { 2321 int ret, i; 2322 struct ehea_port *port = netdev_priv(dev); 2323 2324 if (port->state == EHEA_PORT_UP) 2325 return 0; 2326 2327 ret = ehea_port_res_setup(port, port->num_def_qps); 2328 if (ret) { 2329 netdev_err(dev, "port_res_failed\n"); 2330 goto out; 2331 } 2332 2333 /* Set default QP for this port */ 2334 ret = ehea_configure_port(port); 2335 if (ret) { 2336 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2337 goto out_clean_pr; 2338 } 2339 2340 ret = ehea_reg_interrupts(dev); 2341 if (ret) { 2342 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2343 goto out_clean_pr; 2344 } 2345 2346 for (i = 0; i < port->num_def_qps; i++) { 2347 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2348 if (ret) { 2349 netdev_err(dev, "activate_qp failed\n"); 2350 goto out_free_irqs; 2351 } 2352 } 2353 2354 for (i = 0; i < port->num_def_qps; i++) { 2355 ret = ehea_fill_port_res(&port->port_res[i]); 2356 if (ret) { 2357 netdev_err(dev, "out_free_irqs\n"); 2358 goto out_free_irqs; 2359 } 2360 } 2361 2362 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2363 if (ret) { 2364 ret = -EIO; 2365 goto out_free_irqs; 2366 } 2367 2368 port->state = EHEA_PORT_UP; 2369 2370 ret = 0; 2371 goto out; 2372 2373 out_free_irqs: 2374 ehea_free_interrupts(dev); 2375 2376 out_clean_pr: 2377 ehea_clean_all_portres(port); 2378 out: 2379 if (ret) 2380 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2381 2382 ehea_update_bcmc_registrations(); 2383 ehea_update_firmware_handles(); 2384 2385 return ret; 2386 } 2387 2388 static void port_napi_disable(struct ehea_port *port) 2389 { 2390 int i; 2391 2392 for (i = 0; i < port->num_def_qps; i++) 2393 napi_disable(&port->port_res[i].napi); 2394 } 2395 2396 static void port_napi_enable(struct ehea_port *port) 2397 { 2398 int i; 2399 2400 for (i = 0; i < port->num_def_qps; i++) 2401 napi_enable(&port->port_res[i].napi); 2402 } 2403 2404 static int ehea_open(struct net_device *dev) 2405 { 2406 int ret; 2407 struct ehea_port *port = netdev_priv(dev); 2408 2409 mutex_lock(&port->port_lock); 2410 2411 netif_info(port, ifup, dev, "enabling port\n"); 2412 2413 netif_carrier_off(dev); 2414 2415 ret = ehea_up(dev); 2416 if (!ret) { 2417 port_napi_enable(port); 2418 netif_tx_start_all_queues(dev); 2419 } 2420 2421 mutex_unlock(&port->port_lock); 2422 schedule_delayed_work(&port->stats_work, 2423 round_jiffies_relative(msecs_to_jiffies(1000))); 2424 2425 return ret; 2426 } 2427 2428 static int ehea_down(struct net_device *dev) 2429 { 2430 int ret; 2431 struct ehea_port *port = netdev_priv(dev); 2432 2433 if (port->state == EHEA_PORT_DOWN) 2434 return 0; 2435 2436 ehea_drop_multicast_list(dev); 2437 ehea_allmulti(dev, 0); 2438 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2439 2440 ehea_free_interrupts(dev); 2441 2442 port->state = EHEA_PORT_DOWN; 2443 2444 ehea_update_bcmc_registrations(); 2445 2446 ret = ehea_clean_all_portres(port); 2447 if (ret) 2448 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2449 2450 ehea_update_firmware_handles(); 2451 2452 return ret; 2453 } 2454 2455 static int ehea_stop(struct net_device *dev) 2456 { 2457 int ret; 2458 struct ehea_port *port = netdev_priv(dev); 2459 2460 netif_info(port, ifdown, dev, "disabling port\n"); 2461 2462 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2463 cancel_work_sync(&port->reset_task); 2464 cancel_delayed_work_sync(&port->stats_work); 2465 mutex_lock(&port->port_lock); 2466 netif_tx_stop_all_queues(dev); 2467 port_napi_disable(port); 2468 ret = ehea_down(dev); 2469 mutex_unlock(&port->port_lock); 2470 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2471 return ret; 2472 } 2473 2474 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2475 { 2476 struct ehea_qp qp = *orig_qp; 2477 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2478 struct ehea_swqe *swqe; 2479 int wqe_index; 2480 int i; 2481 2482 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2483 swqe = ehea_get_swqe(&qp, &wqe_index); 2484 swqe->tx_control |= EHEA_SWQE_PURGE; 2485 } 2486 } 2487 2488 static void ehea_flush_sq(struct ehea_port *port) 2489 { 2490 int i; 2491 2492 for (i = 0; i < port->num_def_qps; i++) { 2493 struct ehea_port_res *pr = &port->port_res[i]; 2494 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2495 int ret; 2496 2497 ret = wait_event_timeout(port->swqe_avail_wq, 2498 atomic_read(&pr->swqe_avail) >= swqe_max, 2499 msecs_to_jiffies(100)); 2500 2501 if (!ret) { 2502 pr_err("WARNING: sq not flushed completely\n"); 2503 break; 2504 } 2505 } 2506 } 2507 2508 static int ehea_stop_qps(struct net_device *dev) 2509 { 2510 struct ehea_port *port = netdev_priv(dev); 2511 struct ehea_adapter *adapter = port->adapter; 2512 struct hcp_modify_qp_cb0 *cb0; 2513 int ret = -EIO; 2514 int dret; 2515 int i; 2516 u64 hret; 2517 u64 dummy64 = 0; 2518 u16 dummy16 = 0; 2519 2520 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2521 if (!cb0) { 2522 ret = -ENOMEM; 2523 goto out; 2524 } 2525 2526 for (i = 0; i < (port->num_def_qps); i++) { 2527 struct ehea_port_res *pr = &port->port_res[i]; 2528 struct ehea_qp *qp = pr->qp; 2529 2530 /* Purge send queue */ 2531 ehea_purge_sq(qp); 2532 2533 /* Disable queue pair */ 2534 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2535 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2536 cb0); 2537 if (hret != H_SUCCESS) { 2538 pr_err("query_ehea_qp failed (1)\n"); 2539 goto out; 2540 } 2541 2542 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2543 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2544 2545 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2546 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2547 1), cb0, &dummy64, 2548 &dummy64, &dummy16, &dummy16); 2549 if (hret != H_SUCCESS) { 2550 pr_err("modify_ehea_qp failed (1)\n"); 2551 goto out; 2552 } 2553 2554 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2555 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2556 cb0); 2557 if (hret != H_SUCCESS) { 2558 pr_err("query_ehea_qp failed (2)\n"); 2559 goto out; 2560 } 2561 2562 /* deregister shared memory regions */ 2563 dret = ehea_rem_smrs(pr); 2564 if (dret) { 2565 pr_err("unreg shared memory region failed\n"); 2566 goto out; 2567 } 2568 } 2569 2570 ret = 0; 2571 out: 2572 free_page((unsigned long)cb0); 2573 2574 return ret; 2575 } 2576 2577 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2578 { 2579 struct ehea_qp qp = *orig_qp; 2580 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2581 struct ehea_rwqe *rwqe; 2582 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2583 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2584 struct sk_buff *skb; 2585 u32 lkey = pr->recv_mr.lkey; 2586 2587 2588 int i; 2589 int index; 2590 2591 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2592 rwqe = ehea_get_next_rwqe(&qp, 2); 2593 rwqe->sg_list[0].l_key = lkey; 2594 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2595 skb = skba_rq2[index]; 2596 if (skb) 2597 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2598 } 2599 2600 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2601 rwqe = ehea_get_next_rwqe(&qp, 3); 2602 rwqe->sg_list[0].l_key = lkey; 2603 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2604 skb = skba_rq3[index]; 2605 if (skb) 2606 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2607 } 2608 } 2609 2610 static int ehea_restart_qps(struct net_device *dev) 2611 { 2612 struct ehea_port *port = netdev_priv(dev); 2613 struct ehea_adapter *adapter = port->adapter; 2614 int ret = 0; 2615 int i; 2616 2617 struct hcp_modify_qp_cb0 *cb0; 2618 u64 hret; 2619 u64 dummy64 = 0; 2620 u16 dummy16 = 0; 2621 2622 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2623 if (!cb0) 2624 return -ENOMEM; 2625 2626 for (i = 0; i < (port->num_def_qps); i++) { 2627 struct ehea_port_res *pr = &port->port_res[i]; 2628 struct ehea_qp *qp = pr->qp; 2629 2630 ret = ehea_gen_smrs(pr); 2631 if (ret) { 2632 netdev_err(dev, "creation of shared memory regions failed\n"); 2633 goto out; 2634 } 2635 2636 ehea_update_rqs(qp, pr); 2637 2638 /* Enable queue pair */ 2639 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2640 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2641 cb0); 2642 if (hret != H_SUCCESS) { 2643 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2644 ret = -EFAULT; 2645 goto out; 2646 } 2647 2648 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2649 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2650 2651 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2652 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2653 1), cb0, &dummy64, 2654 &dummy64, &dummy16, &dummy16); 2655 if (hret != H_SUCCESS) { 2656 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2657 ret = -EFAULT; 2658 goto out; 2659 } 2660 2661 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2662 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2663 cb0); 2664 if (hret != H_SUCCESS) { 2665 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2666 ret = -EFAULT; 2667 goto out; 2668 } 2669 2670 /* refill entire queue */ 2671 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2672 ehea_refill_rq2(pr, 0); 2673 ehea_refill_rq3(pr, 0); 2674 } 2675 out: 2676 free_page((unsigned long)cb0); 2677 2678 return ret; 2679 } 2680 2681 static void ehea_reset_port(struct work_struct *work) 2682 { 2683 int ret; 2684 struct ehea_port *port = 2685 container_of(work, struct ehea_port, reset_task); 2686 struct net_device *dev = port->netdev; 2687 2688 mutex_lock(&dlpar_mem_lock); 2689 port->resets++; 2690 mutex_lock(&port->port_lock); 2691 netif_tx_disable(dev); 2692 2693 port_napi_disable(port); 2694 2695 ehea_down(dev); 2696 2697 ret = ehea_up(dev); 2698 if (ret) 2699 goto out; 2700 2701 ehea_set_multicast_list(dev); 2702 2703 netif_info(port, timer, dev, "reset successful\n"); 2704 2705 port_napi_enable(port); 2706 2707 netif_tx_wake_all_queues(dev); 2708 out: 2709 mutex_unlock(&port->port_lock); 2710 mutex_unlock(&dlpar_mem_lock); 2711 } 2712 2713 static void ehea_rereg_mrs(void) 2714 { 2715 int ret, i; 2716 struct ehea_adapter *adapter; 2717 2718 pr_info("LPAR memory changed - re-initializing driver\n"); 2719 2720 list_for_each_entry(adapter, &adapter_list, list) 2721 if (adapter->active_ports) { 2722 /* Shutdown all ports */ 2723 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2724 struct ehea_port *port = adapter->port[i]; 2725 struct net_device *dev; 2726 2727 if (!port) 2728 continue; 2729 2730 dev = port->netdev; 2731 2732 if (dev->flags & IFF_UP) { 2733 mutex_lock(&port->port_lock); 2734 netif_tx_disable(dev); 2735 ehea_flush_sq(port); 2736 ret = ehea_stop_qps(dev); 2737 if (ret) { 2738 mutex_unlock(&port->port_lock); 2739 goto out; 2740 } 2741 port_napi_disable(port); 2742 mutex_unlock(&port->port_lock); 2743 } 2744 reset_sq_restart_flag(port); 2745 } 2746 2747 /* Unregister old memory region */ 2748 ret = ehea_rem_mr(&adapter->mr); 2749 if (ret) { 2750 pr_err("unregister MR failed - driver inoperable!\n"); 2751 goto out; 2752 } 2753 } 2754 2755 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2756 2757 list_for_each_entry(adapter, &adapter_list, list) 2758 if (adapter->active_ports) { 2759 /* Register new memory region */ 2760 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2761 if (ret) { 2762 pr_err("register MR failed - driver inoperable!\n"); 2763 goto out; 2764 } 2765 2766 /* Restart all ports */ 2767 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2768 struct ehea_port *port = adapter->port[i]; 2769 2770 if (port) { 2771 struct net_device *dev = port->netdev; 2772 2773 if (dev->flags & IFF_UP) { 2774 mutex_lock(&port->port_lock); 2775 ret = ehea_restart_qps(dev); 2776 if (!ret) { 2777 check_sqs(port); 2778 port_napi_enable(port); 2779 netif_tx_wake_all_queues(dev); 2780 } else { 2781 netdev_err(dev, "Unable to restart QPS\n"); 2782 } 2783 mutex_unlock(&port->port_lock); 2784 } 2785 } 2786 } 2787 } 2788 pr_info("re-initializing driver complete\n"); 2789 out: 2790 return; 2791 } 2792 2793 static void ehea_tx_watchdog(struct net_device *dev, unsigned int txqueue) 2794 { 2795 struct ehea_port *port = netdev_priv(dev); 2796 2797 if (netif_carrier_ok(dev) && 2798 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2799 ehea_schedule_port_reset(port); 2800 } 2801 2802 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2803 { 2804 struct hcp_query_ehea *cb; 2805 u64 hret; 2806 int ret; 2807 2808 cb = (void *)get_zeroed_page(GFP_KERNEL); 2809 if (!cb) { 2810 ret = -ENOMEM; 2811 goto out; 2812 } 2813 2814 hret = ehea_h_query_ehea(adapter->handle, cb); 2815 2816 if (hret != H_SUCCESS) { 2817 ret = -EIO; 2818 goto out_herr; 2819 } 2820 2821 adapter->max_mc_mac = cb->max_mc_mac - 1; 2822 ret = 0; 2823 2824 out_herr: 2825 free_page((unsigned long)cb); 2826 out: 2827 return ret; 2828 } 2829 2830 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2831 { 2832 struct hcp_ehea_port_cb4 *cb4; 2833 u64 hret; 2834 int ret = 0; 2835 2836 *jumbo = 0; 2837 2838 /* (Try to) enable *jumbo frames */ 2839 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2840 if (!cb4) { 2841 pr_err("no mem for cb4\n"); 2842 ret = -ENOMEM; 2843 goto out; 2844 } else { 2845 hret = ehea_h_query_ehea_port(port->adapter->handle, 2846 port->logical_port_id, 2847 H_PORT_CB4, 2848 H_PORT_CB4_JUMBO, cb4); 2849 if (hret == H_SUCCESS) { 2850 if (cb4->jumbo_frame) 2851 *jumbo = 1; 2852 else { 2853 cb4->jumbo_frame = 1; 2854 hret = ehea_h_modify_ehea_port(port->adapter-> 2855 handle, 2856 port-> 2857 logical_port_id, 2858 H_PORT_CB4, 2859 H_PORT_CB4_JUMBO, 2860 cb4); 2861 if (hret == H_SUCCESS) 2862 *jumbo = 1; 2863 } 2864 } else 2865 ret = -EINVAL; 2866 2867 free_page((unsigned long)cb4); 2868 } 2869 out: 2870 return ret; 2871 } 2872 2873 static ssize_t log_port_id_show(struct device *dev, 2874 struct device_attribute *attr, char *buf) 2875 { 2876 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2877 return sprintf(buf, "%d", port->logical_port_id); 2878 } 2879 2880 static DEVICE_ATTR_RO(log_port_id); 2881 2882 static void logical_port_release(struct device *dev) 2883 { 2884 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2885 of_node_put(port->ofdev.dev.of_node); 2886 } 2887 2888 static struct device *ehea_register_port(struct ehea_port *port, 2889 struct device_node *dn) 2890 { 2891 int ret; 2892 2893 port->ofdev.dev.of_node = of_node_get(dn); 2894 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2895 port->ofdev.dev.bus = &ibmebus_bus_type; 2896 2897 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2898 port->ofdev.dev.release = logical_port_release; 2899 2900 ret = of_device_register(&port->ofdev); 2901 if (ret) { 2902 pr_err("failed to register device. ret=%d\n", ret); 2903 goto out; 2904 } 2905 2906 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2907 if (ret) { 2908 pr_err("failed to register attributes, ret=%d\n", ret); 2909 goto out_unreg_of_dev; 2910 } 2911 2912 return &port->ofdev.dev; 2913 2914 out_unreg_of_dev: 2915 of_device_unregister(&port->ofdev); 2916 out: 2917 return NULL; 2918 } 2919 2920 static void ehea_unregister_port(struct ehea_port *port) 2921 { 2922 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2923 of_device_unregister(&port->ofdev); 2924 } 2925 2926 static const struct net_device_ops ehea_netdev_ops = { 2927 .ndo_open = ehea_open, 2928 .ndo_stop = ehea_stop, 2929 .ndo_start_xmit = ehea_start_xmit, 2930 .ndo_get_stats64 = ehea_get_stats64, 2931 .ndo_set_mac_address = ehea_set_mac_addr, 2932 .ndo_validate_addr = eth_validate_addr, 2933 .ndo_set_rx_mode = ehea_set_multicast_list, 2934 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2935 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2936 .ndo_tx_timeout = ehea_tx_watchdog, 2937 }; 2938 2939 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2940 u32 logical_port_id, 2941 struct device_node *dn) 2942 { 2943 int ret; 2944 struct net_device *dev; 2945 struct ehea_port *port; 2946 struct device *port_dev; 2947 int jumbo; 2948 2949 /* allocate memory for the port structures */ 2950 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2951 2952 if (!dev) { 2953 ret = -ENOMEM; 2954 goto out_err; 2955 } 2956 2957 port = netdev_priv(dev); 2958 2959 mutex_init(&port->port_lock); 2960 port->state = EHEA_PORT_DOWN; 2961 port->sig_comp_iv = sq_entries / 10; 2962 2963 port->adapter = adapter; 2964 port->netdev = dev; 2965 port->logical_port_id = logical_port_id; 2966 2967 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 2968 2969 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 2970 if (!port->mc_list) { 2971 ret = -ENOMEM; 2972 goto out_free_ethdev; 2973 } 2974 2975 INIT_LIST_HEAD(&port->mc_list->list); 2976 2977 ret = ehea_sense_port_attr(port); 2978 if (ret) 2979 goto out_free_mc_list; 2980 2981 netif_set_real_num_rx_queues(dev, port->num_def_qps); 2982 netif_set_real_num_tx_queues(dev, port->num_def_qps); 2983 2984 port_dev = ehea_register_port(port, dn); 2985 if (!port_dev) 2986 goto out_free_mc_list; 2987 2988 SET_NETDEV_DEV(dev, port_dev); 2989 2990 /* initialize net_device structure */ 2991 eth_hw_addr_set(dev, (u8 *)&port->mac_addr); 2992 2993 dev->netdev_ops = &ehea_netdev_ops; 2994 ehea_set_ethtool_ops(dev); 2995 2996 dev->hw_features = NETIF_F_SG | NETIF_F_TSO | 2997 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX; 2998 dev->features = NETIF_F_SG | NETIF_F_TSO | 2999 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | 3000 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 3001 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM; 3002 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 3003 NETIF_F_IP_CSUM; 3004 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3005 3006 /* MTU range: 68 - 9022 */ 3007 dev->min_mtu = ETH_MIN_MTU; 3008 dev->max_mtu = EHEA_MAX_PACKET_SIZE; 3009 3010 INIT_WORK(&port->reset_task, ehea_reset_port); 3011 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3012 3013 init_waitqueue_head(&port->swqe_avail_wq); 3014 init_waitqueue_head(&port->restart_wq); 3015 3016 ret = register_netdev(dev); 3017 if (ret) { 3018 pr_err("register_netdev failed. ret=%d\n", ret); 3019 goto out_unreg_port; 3020 } 3021 3022 ret = ehea_get_jumboframe_status(port, &jumbo); 3023 if (ret) 3024 netdev_err(dev, "failed determining jumbo frame status\n"); 3025 3026 netdev_info(dev, "Jumbo frames are %sabled\n", 3027 jumbo == 1 ? "en" : "dis"); 3028 3029 adapter->active_ports++; 3030 3031 return port; 3032 3033 out_unreg_port: 3034 ehea_unregister_port(port); 3035 3036 out_free_mc_list: 3037 kfree(port->mc_list); 3038 3039 out_free_ethdev: 3040 free_netdev(dev); 3041 3042 out_err: 3043 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3044 logical_port_id, ret); 3045 return NULL; 3046 } 3047 3048 static void ehea_shutdown_single_port(struct ehea_port *port) 3049 { 3050 struct ehea_adapter *adapter = port->adapter; 3051 3052 cancel_work_sync(&port->reset_task); 3053 cancel_delayed_work_sync(&port->stats_work); 3054 unregister_netdev(port->netdev); 3055 ehea_unregister_port(port); 3056 kfree(port->mc_list); 3057 free_netdev(port->netdev); 3058 adapter->active_ports--; 3059 } 3060 3061 static int ehea_setup_ports(struct ehea_adapter *adapter) 3062 { 3063 struct device_node *lhea_dn; 3064 struct device_node *eth_dn = NULL; 3065 3066 const u32 *dn_log_port_id; 3067 int i = 0; 3068 3069 lhea_dn = adapter->ofdev->dev.of_node; 3070 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3071 3072 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3073 NULL); 3074 if (!dn_log_port_id) { 3075 pr_err("bad device node: eth_dn name=%pOF\n", eth_dn); 3076 continue; 3077 } 3078 3079 if (ehea_add_adapter_mr(adapter)) { 3080 pr_err("creating MR failed\n"); 3081 of_node_put(eth_dn); 3082 return -EIO; 3083 } 3084 3085 adapter->port[i] = ehea_setup_single_port(adapter, 3086 *dn_log_port_id, 3087 eth_dn); 3088 if (adapter->port[i]) 3089 netdev_info(adapter->port[i]->netdev, 3090 "logical port id #%d\n", *dn_log_port_id); 3091 else 3092 ehea_remove_adapter_mr(adapter); 3093 3094 i++; 3095 } 3096 return 0; 3097 } 3098 3099 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3100 u32 logical_port_id) 3101 { 3102 struct device_node *lhea_dn; 3103 struct device_node *eth_dn = NULL; 3104 const u32 *dn_log_port_id; 3105 3106 lhea_dn = adapter->ofdev->dev.of_node; 3107 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3108 3109 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3110 NULL); 3111 if (dn_log_port_id) 3112 if (*dn_log_port_id == logical_port_id) 3113 return eth_dn; 3114 } 3115 3116 return NULL; 3117 } 3118 3119 static ssize_t probe_port_store(struct device *dev, 3120 struct device_attribute *attr, 3121 const char *buf, size_t count) 3122 { 3123 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3124 struct ehea_port *port; 3125 struct device_node *eth_dn = NULL; 3126 int i; 3127 3128 u32 logical_port_id; 3129 3130 sscanf(buf, "%d", &logical_port_id); 3131 3132 port = ehea_get_port(adapter, logical_port_id); 3133 3134 if (port) { 3135 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3136 logical_port_id); 3137 return -EINVAL; 3138 } 3139 3140 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3141 3142 if (!eth_dn) { 3143 pr_info("no logical port with id %d found\n", logical_port_id); 3144 return -EINVAL; 3145 } 3146 3147 if (ehea_add_adapter_mr(adapter)) { 3148 pr_err("creating MR failed\n"); 3149 of_node_put(eth_dn); 3150 return -EIO; 3151 } 3152 3153 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3154 3155 of_node_put(eth_dn); 3156 3157 if (port) { 3158 for (i = 0; i < EHEA_MAX_PORTS; i++) 3159 if (!adapter->port[i]) { 3160 adapter->port[i] = port; 3161 break; 3162 } 3163 3164 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3165 logical_port_id); 3166 } else { 3167 ehea_remove_adapter_mr(adapter); 3168 return -EIO; 3169 } 3170 3171 return (ssize_t) count; 3172 } 3173 3174 static ssize_t remove_port_store(struct device *dev, 3175 struct device_attribute *attr, 3176 const char *buf, size_t count) 3177 { 3178 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3179 struct ehea_port *port; 3180 int i; 3181 u32 logical_port_id; 3182 3183 sscanf(buf, "%d", &logical_port_id); 3184 3185 port = ehea_get_port(adapter, logical_port_id); 3186 3187 if (port) { 3188 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3189 logical_port_id); 3190 3191 ehea_shutdown_single_port(port); 3192 3193 for (i = 0; i < EHEA_MAX_PORTS; i++) 3194 if (adapter->port[i] == port) { 3195 adapter->port[i] = NULL; 3196 break; 3197 } 3198 } else { 3199 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3200 logical_port_id); 3201 return -EINVAL; 3202 } 3203 3204 ehea_remove_adapter_mr(adapter); 3205 3206 return (ssize_t) count; 3207 } 3208 3209 static DEVICE_ATTR_WO(probe_port); 3210 static DEVICE_ATTR_WO(remove_port); 3211 3212 static int ehea_create_device_sysfs(struct platform_device *dev) 3213 { 3214 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3215 if (ret) 3216 goto out; 3217 3218 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3219 out: 3220 return ret; 3221 } 3222 3223 static void ehea_remove_device_sysfs(struct platform_device *dev) 3224 { 3225 device_remove_file(&dev->dev, &dev_attr_probe_port); 3226 device_remove_file(&dev->dev, &dev_attr_remove_port); 3227 } 3228 3229 static int ehea_reboot_notifier(struct notifier_block *nb, 3230 unsigned long action, void *unused) 3231 { 3232 if (action == SYS_RESTART) { 3233 pr_info("Reboot: freeing all eHEA resources\n"); 3234 ibmebus_unregister_driver(&ehea_driver); 3235 } 3236 return NOTIFY_DONE; 3237 } 3238 3239 static struct notifier_block ehea_reboot_nb = { 3240 .notifier_call = ehea_reboot_notifier, 3241 }; 3242 3243 static int ehea_mem_notifier(struct notifier_block *nb, 3244 unsigned long action, void *data) 3245 { 3246 int ret = NOTIFY_BAD; 3247 struct memory_notify *arg = data; 3248 3249 mutex_lock(&dlpar_mem_lock); 3250 3251 switch (action) { 3252 case MEM_CANCEL_OFFLINE: 3253 pr_info("memory offlining canceled"); 3254 fallthrough; /* re-add canceled memory block */ 3255 3256 case MEM_ONLINE: 3257 pr_info("memory is going online"); 3258 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3259 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3260 goto out_unlock; 3261 ehea_rereg_mrs(); 3262 break; 3263 3264 case MEM_GOING_OFFLINE: 3265 pr_info("memory is going offline"); 3266 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3267 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3268 goto out_unlock; 3269 ehea_rereg_mrs(); 3270 break; 3271 3272 default: 3273 break; 3274 } 3275 3276 ehea_update_firmware_handles(); 3277 ret = NOTIFY_OK; 3278 3279 out_unlock: 3280 mutex_unlock(&dlpar_mem_lock); 3281 return ret; 3282 } 3283 3284 static struct notifier_block ehea_mem_nb = { 3285 .notifier_call = ehea_mem_notifier, 3286 }; 3287 3288 static void ehea_crash_handler(void) 3289 { 3290 int i; 3291 3292 if (ehea_fw_handles.arr) 3293 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3294 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3295 ehea_fw_handles.arr[i].fwh, 3296 FORCE_FREE); 3297 3298 if (ehea_bcmc_regs.arr) 3299 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3300 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3301 ehea_bcmc_regs.arr[i].port_id, 3302 ehea_bcmc_regs.arr[i].reg_type, 3303 ehea_bcmc_regs.arr[i].macaddr, 3304 0, H_DEREG_BCMC); 3305 } 3306 3307 static atomic_t ehea_memory_hooks_registered; 3308 3309 /* Register memory hooks on probe of first adapter */ 3310 static int ehea_register_memory_hooks(void) 3311 { 3312 int ret = 0; 3313 3314 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1) 3315 return 0; 3316 3317 ret = ehea_create_busmap(); 3318 if (ret) { 3319 pr_info("ehea_create_busmap failed\n"); 3320 goto out; 3321 } 3322 3323 ret = register_reboot_notifier(&ehea_reboot_nb); 3324 if (ret) { 3325 pr_info("register_reboot_notifier failed\n"); 3326 goto out; 3327 } 3328 3329 ret = register_memory_notifier(&ehea_mem_nb); 3330 if (ret) { 3331 pr_info("register_memory_notifier failed\n"); 3332 goto out2; 3333 } 3334 3335 ret = crash_shutdown_register(ehea_crash_handler); 3336 if (ret) { 3337 pr_info("crash_shutdown_register failed\n"); 3338 goto out3; 3339 } 3340 3341 return 0; 3342 3343 out3: 3344 unregister_memory_notifier(&ehea_mem_nb); 3345 out2: 3346 unregister_reboot_notifier(&ehea_reboot_nb); 3347 out: 3348 atomic_dec(&ehea_memory_hooks_registered); 3349 return ret; 3350 } 3351 3352 static void ehea_unregister_memory_hooks(void) 3353 { 3354 /* Only remove the hooks if we've registered them */ 3355 if (atomic_read(&ehea_memory_hooks_registered) == 0) 3356 return; 3357 3358 unregister_reboot_notifier(&ehea_reboot_nb); 3359 if (crash_shutdown_unregister(ehea_crash_handler)) 3360 pr_info("failed unregistering crash handler\n"); 3361 unregister_memory_notifier(&ehea_mem_nb); 3362 } 3363 3364 static int ehea_probe_adapter(struct platform_device *dev) 3365 { 3366 struct ehea_adapter *adapter; 3367 const u64 *adapter_handle; 3368 int ret; 3369 int i; 3370 3371 ret = ehea_register_memory_hooks(); 3372 if (ret) 3373 return ret; 3374 3375 if (!dev || !dev->dev.of_node) { 3376 pr_err("Invalid ibmebus device probed\n"); 3377 return -EINVAL; 3378 } 3379 3380 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL); 3381 if (!adapter) { 3382 ret = -ENOMEM; 3383 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3384 goto out; 3385 } 3386 3387 list_add(&adapter->list, &adapter_list); 3388 3389 adapter->ofdev = dev; 3390 3391 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3392 NULL); 3393 if (adapter_handle) 3394 adapter->handle = *adapter_handle; 3395 3396 if (!adapter->handle) { 3397 dev_err(&dev->dev, "failed getting handle for adapter" 3398 " '%pOF'\n", dev->dev.of_node); 3399 ret = -ENODEV; 3400 goto out_free_ad; 3401 } 3402 3403 adapter->pd = EHEA_PD_ID; 3404 3405 platform_set_drvdata(dev, adapter); 3406 3407 3408 /* initialize adapter and ports */ 3409 /* get adapter properties */ 3410 ret = ehea_sense_adapter_attr(adapter); 3411 if (ret) { 3412 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3413 goto out_free_ad; 3414 } 3415 3416 adapter->neq = ehea_create_eq(adapter, 3417 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3418 if (!adapter->neq) { 3419 ret = -EIO; 3420 dev_err(&dev->dev, "NEQ creation failed\n"); 3421 goto out_free_ad; 3422 } 3423 3424 tasklet_setup(&adapter->neq_tasklet, ehea_neq_tasklet); 3425 3426 ret = ehea_create_device_sysfs(dev); 3427 if (ret) 3428 goto out_kill_eq; 3429 3430 ret = ehea_setup_ports(adapter); 3431 if (ret) { 3432 dev_err(&dev->dev, "setup_ports failed\n"); 3433 goto out_rem_dev_sysfs; 3434 } 3435 3436 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3437 ehea_interrupt_neq, 0, 3438 "ehea_neq", adapter); 3439 if (ret) { 3440 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3441 goto out_shutdown_ports; 3442 } 3443 3444 /* Handle any events that might be pending. */ 3445 tasklet_hi_schedule(&adapter->neq_tasklet); 3446 3447 ret = 0; 3448 goto out; 3449 3450 out_shutdown_ports: 3451 for (i = 0; i < EHEA_MAX_PORTS; i++) 3452 if (adapter->port[i]) { 3453 ehea_shutdown_single_port(adapter->port[i]); 3454 adapter->port[i] = NULL; 3455 } 3456 3457 out_rem_dev_sysfs: 3458 ehea_remove_device_sysfs(dev); 3459 3460 out_kill_eq: 3461 ehea_destroy_eq(adapter->neq); 3462 3463 out_free_ad: 3464 list_del(&adapter->list); 3465 3466 out: 3467 ehea_update_firmware_handles(); 3468 3469 return ret; 3470 } 3471 3472 static int ehea_remove(struct platform_device *dev) 3473 { 3474 struct ehea_adapter *adapter = platform_get_drvdata(dev); 3475 int i; 3476 3477 for (i = 0; i < EHEA_MAX_PORTS; i++) 3478 if (adapter->port[i]) { 3479 ehea_shutdown_single_port(adapter->port[i]); 3480 adapter->port[i] = NULL; 3481 } 3482 3483 ehea_remove_device_sysfs(dev); 3484 3485 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3486 tasklet_kill(&adapter->neq_tasklet); 3487 3488 ehea_destroy_eq(adapter->neq); 3489 ehea_remove_adapter_mr(adapter); 3490 list_del(&adapter->list); 3491 3492 ehea_update_firmware_handles(); 3493 3494 return 0; 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