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 33 #include <net/ip.h> 34 35 #include "ehea.h" 36 #include "ehea_qmr.h" 37 #include "ehea_phyp.h" 38 39 40 MODULE_LICENSE("GPL"); 41 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>"); 42 MODULE_DESCRIPTION("IBM eServer HEA Driver"); 43 MODULE_VERSION(DRV_VERSION); 44 45 46 static int msg_level = -1; 47 static int rq1_entries = EHEA_DEF_ENTRIES_RQ1; 48 static int rq2_entries = EHEA_DEF_ENTRIES_RQ2; 49 static int rq3_entries = EHEA_DEF_ENTRIES_RQ3; 50 static int sq_entries = EHEA_DEF_ENTRIES_SQ; 51 static int use_mcs = 1; 52 static int prop_carrier_state; 53 54 module_param(msg_level, int, 0); 55 module_param(rq1_entries, int, 0); 56 module_param(rq2_entries, int, 0); 57 module_param(rq3_entries, int, 0); 58 module_param(sq_entries, int, 0); 59 module_param(prop_carrier_state, int, 0); 60 module_param(use_mcs, int, 0); 61 62 MODULE_PARM_DESC(msg_level, "msg_level"); 63 MODULE_PARM_DESC(prop_carrier_state, "Propagate carrier state of physical " 64 "port to stack. 1:yes, 0:no. Default = 0 "); 65 MODULE_PARM_DESC(rq3_entries, "Number of entries for Receive Queue 3 " 66 "[2^x - 1], x = [7..14]. Default = " 67 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ3) ")"); 68 MODULE_PARM_DESC(rq2_entries, "Number of entries for Receive Queue 2 " 69 "[2^x - 1], x = [7..14]. Default = " 70 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ2) ")"); 71 MODULE_PARM_DESC(rq1_entries, "Number of entries for Receive Queue 1 " 72 "[2^x - 1], x = [7..14]. Default = " 73 __MODULE_STRING(EHEA_DEF_ENTRIES_RQ1) ")"); 74 MODULE_PARM_DESC(sq_entries, " Number of entries for the Send Queue " 75 "[2^x - 1], x = [7..14]. Default = " 76 __MODULE_STRING(EHEA_DEF_ENTRIES_SQ) ")"); 77 MODULE_PARM_DESC(use_mcs, " Multiple receive queues, 1: enable, 0: disable, " 78 "Default = 1"); 79 80 static int port_name_cnt; 81 static LIST_HEAD(adapter_list); 82 static unsigned long ehea_driver_flags; 83 static DEFINE_MUTEX(dlpar_mem_lock); 84 static struct ehea_fw_handle_array ehea_fw_handles; 85 static struct ehea_bcmc_reg_array ehea_bcmc_regs; 86 87 88 static int ehea_probe_adapter(struct platform_device *dev); 89 90 static int ehea_remove(struct platform_device *dev); 91 92 static const struct of_device_id ehea_module_device_table[] = { 93 { 94 .name = "lhea", 95 .compatible = "IBM,lhea", 96 }, 97 { 98 .type = "network", 99 .compatible = "IBM,lhea-ethernet", 100 }, 101 {}, 102 }; 103 MODULE_DEVICE_TABLE(of, ehea_module_device_table); 104 105 static const struct of_device_id ehea_device_table[] = { 106 { 107 .name = "lhea", 108 .compatible = "IBM,lhea", 109 }, 110 {}, 111 }; 112 113 static struct platform_driver ehea_driver = { 114 .driver = { 115 .name = "ehea", 116 .owner = THIS_MODULE, 117 .of_match_table = ehea_device_table, 118 }, 119 .probe = ehea_probe_adapter, 120 .remove = ehea_remove, 121 }; 122 123 void ehea_dump(void *adr, int len, char *msg) 124 { 125 int x; 126 unsigned char *deb = adr; 127 for (x = 0; x < len; x += 16) { 128 pr_info("%s adr=%p ofs=%04x %016llx %016llx\n", 129 msg, deb, x, *((u64 *)&deb[0]), *((u64 *)&deb[8])); 130 deb += 16; 131 } 132 } 133 134 static void ehea_schedule_port_reset(struct ehea_port *port) 135 { 136 if (!test_bit(__EHEA_DISABLE_PORT_RESET, &port->flags)) 137 schedule_work(&port->reset_task); 138 } 139 140 static void ehea_update_firmware_handles(void) 141 { 142 struct ehea_fw_handle_entry *arr = NULL; 143 struct ehea_adapter *adapter; 144 int num_adapters = 0; 145 int num_ports = 0; 146 int num_portres = 0; 147 int i = 0; 148 int num_fw_handles, k, l; 149 150 /* Determine number of handles */ 151 mutex_lock(&ehea_fw_handles.lock); 152 153 list_for_each_entry(adapter, &adapter_list, list) { 154 num_adapters++; 155 156 for (k = 0; k < EHEA_MAX_PORTS; k++) { 157 struct ehea_port *port = adapter->port[k]; 158 159 if (!port || (port->state != EHEA_PORT_UP)) 160 continue; 161 162 num_ports++; 163 num_portres += port->num_def_qps; 164 } 165 } 166 167 num_fw_handles = num_adapters * EHEA_NUM_ADAPTER_FW_HANDLES + 168 num_ports * EHEA_NUM_PORT_FW_HANDLES + 169 num_portres * EHEA_NUM_PORTRES_FW_HANDLES; 170 171 if (num_fw_handles) { 172 arr = kcalloc(num_fw_handles, sizeof(*arr), GFP_KERNEL); 173 if (!arr) 174 goto out; /* Keep the existing array */ 175 } else 176 goto out_update; 177 178 list_for_each_entry(adapter, &adapter_list, list) { 179 if (num_adapters == 0) 180 break; 181 182 for (k = 0; k < EHEA_MAX_PORTS; k++) { 183 struct ehea_port *port = adapter->port[k]; 184 185 if (!port || (port->state != EHEA_PORT_UP) || 186 (num_ports == 0)) 187 continue; 188 189 for (l = 0; l < port->num_def_qps; l++) { 190 struct ehea_port_res *pr = &port->port_res[l]; 191 192 arr[i].adh = adapter->handle; 193 arr[i++].fwh = pr->qp->fw_handle; 194 arr[i].adh = adapter->handle; 195 arr[i++].fwh = pr->send_cq->fw_handle; 196 arr[i].adh = adapter->handle; 197 arr[i++].fwh = pr->recv_cq->fw_handle; 198 arr[i].adh = adapter->handle; 199 arr[i++].fwh = pr->eq->fw_handle; 200 arr[i].adh = adapter->handle; 201 arr[i++].fwh = pr->send_mr.handle; 202 arr[i].adh = adapter->handle; 203 arr[i++].fwh = pr->recv_mr.handle; 204 } 205 arr[i].adh = adapter->handle; 206 arr[i++].fwh = port->qp_eq->fw_handle; 207 num_ports--; 208 } 209 210 arr[i].adh = adapter->handle; 211 arr[i++].fwh = adapter->neq->fw_handle; 212 213 if (adapter->mr.handle) { 214 arr[i].adh = adapter->handle; 215 arr[i++].fwh = adapter->mr.handle; 216 } 217 num_adapters--; 218 } 219 220 out_update: 221 kfree(ehea_fw_handles.arr); 222 ehea_fw_handles.arr = arr; 223 ehea_fw_handles.num_entries = i; 224 out: 225 mutex_unlock(&ehea_fw_handles.lock); 226 } 227 228 static void ehea_update_bcmc_registrations(void) 229 { 230 unsigned long flags; 231 struct ehea_bcmc_reg_entry *arr = NULL; 232 struct ehea_adapter *adapter; 233 struct ehea_mc_list *mc_entry; 234 int num_registrations = 0; 235 int i = 0; 236 int k; 237 238 spin_lock_irqsave(&ehea_bcmc_regs.lock, flags); 239 240 /* Determine number of registrations */ 241 list_for_each_entry(adapter, &adapter_list, list) 242 for (k = 0; k < EHEA_MAX_PORTS; k++) { 243 struct ehea_port *port = adapter->port[k]; 244 245 if (!port || (port->state != EHEA_PORT_UP)) 246 continue; 247 248 num_registrations += 2; /* Broadcast registrations */ 249 250 list_for_each_entry(mc_entry, &port->mc_list->list,list) 251 num_registrations += 2; 252 } 253 254 if (num_registrations) { 255 arr = kcalloc(num_registrations, sizeof(*arr), GFP_ATOMIC); 256 if (!arr) 257 goto out; /* Keep the existing array */ 258 } else 259 goto out_update; 260 261 list_for_each_entry(adapter, &adapter_list, list) { 262 for (k = 0; k < EHEA_MAX_PORTS; k++) { 263 struct ehea_port *port = adapter->port[k]; 264 265 if (!port || (port->state != EHEA_PORT_UP)) 266 continue; 267 268 if (num_registrations == 0) 269 goto out_update; 270 271 arr[i].adh = adapter->handle; 272 arr[i].port_id = port->logical_port_id; 273 arr[i].reg_type = EHEA_BCMC_BROADCAST | 274 EHEA_BCMC_UNTAGGED; 275 arr[i++].macaddr = port->mac_addr; 276 277 arr[i].adh = adapter->handle; 278 arr[i].port_id = port->logical_port_id; 279 arr[i].reg_type = EHEA_BCMC_BROADCAST | 280 EHEA_BCMC_VLANID_ALL; 281 arr[i++].macaddr = port->mac_addr; 282 num_registrations -= 2; 283 284 list_for_each_entry(mc_entry, 285 &port->mc_list->list, list) { 286 if (num_registrations == 0) 287 goto out_update; 288 289 arr[i].adh = adapter->handle; 290 arr[i].port_id = port->logical_port_id; 291 arr[i].reg_type = EHEA_BCMC_MULTICAST | 292 EHEA_BCMC_UNTAGGED; 293 if (mc_entry->macaddr == 0) 294 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 295 arr[i++].macaddr = mc_entry->macaddr; 296 297 arr[i].adh = adapter->handle; 298 arr[i].port_id = port->logical_port_id; 299 arr[i].reg_type = EHEA_BCMC_MULTICAST | 300 EHEA_BCMC_VLANID_ALL; 301 if (mc_entry->macaddr == 0) 302 arr[i].reg_type |= EHEA_BCMC_SCOPE_ALL; 303 arr[i++].macaddr = mc_entry->macaddr; 304 num_registrations -= 2; 305 } 306 } 307 } 308 309 out_update: 310 kfree(ehea_bcmc_regs.arr); 311 ehea_bcmc_regs.arr = arr; 312 ehea_bcmc_regs.num_entries = i; 313 out: 314 spin_unlock_irqrestore(&ehea_bcmc_regs.lock, flags); 315 } 316 317 static void ehea_get_stats64(struct net_device *dev, 318 struct rtnl_link_stats64 *stats) 319 { 320 struct ehea_port *port = netdev_priv(dev); 321 u64 rx_packets = 0, tx_packets = 0, rx_bytes = 0, tx_bytes = 0; 322 int i; 323 324 for (i = 0; i < port->num_def_qps; i++) { 325 rx_packets += port->port_res[i].rx_packets; 326 rx_bytes += port->port_res[i].rx_bytes; 327 } 328 329 for (i = 0; i < port->num_def_qps; i++) { 330 tx_packets += port->port_res[i].tx_packets; 331 tx_bytes += port->port_res[i].tx_bytes; 332 } 333 334 stats->tx_packets = tx_packets; 335 stats->rx_bytes = rx_bytes; 336 stats->tx_bytes = tx_bytes; 337 stats->rx_packets = rx_packets; 338 339 stats->multicast = port->stats.multicast; 340 stats->rx_errors = port->stats.rx_errors; 341 } 342 343 static void ehea_update_stats(struct work_struct *work) 344 { 345 struct ehea_port *port = 346 container_of(work, struct ehea_port, stats_work.work); 347 struct net_device *dev = port->netdev; 348 struct rtnl_link_stats64 *stats = &port->stats; 349 struct hcp_ehea_port_cb2 *cb2; 350 u64 hret; 351 352 cb2 = (void *)get_zeroed_page(GFP_KERNEL); 353 if (!cb2) { 354 netdev_err(dev, "No mem for cb2. Some interface statistics were not updated\n"); 355 goto resched; 356 } 357 358 hret = ehea_h_query_ehea_port(port->adapter->handle, 359 port->logical_port_id, 360 H_PORT_CB2, H_PORT_CB2_ALL, cb2); 361 if (hret != H_SUCCESS) { 362 netdev_err(dev, "query_ehea_port failed\n"); 363 goto out_herr; 364 } 365 366 if (netif_msg_hw(port)) 367 ehea_dump(cb2, sizeof(*cb2), "net_device_stats"); 368 369 stats->multicast = cb2->rxmcp; 370 stats->rx_errors = cb2->rxuerr; 371 372 out_herr: 373 free_page((unsigned long)cb2); 374 resched: 375 schedule_delayed_work(&port->stats_work, 376 round_jiffies_relative(msecs_to_jiffies(1000))); 377 } 378 379 static void ehea_refill_rq1(struct ehea_port_res *pr, int index, int nr_of_wqes) 380 { 381 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 382 struct net_device *dev = pr->port->netdev; 383 int max_index_mask = pr->rq1_skba.len - 1; 384 int fill_wqes = pr->rq1_skba.os_skbs + nr_of_wqes; 385 int adder = 0; 386 int i; 387 388 pr->rq1_skba.os_skbs = 0; 389 390 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 391 if (nr_of_wqes > 0) 392 pr->rq1_skba.index = index; 393 pr->rq1_skba.os_skbs = fill_wqes; 394 return; 395 } 396 397 for (i = 0; i < fill_wqes; i++) { 398 if (!skb_arr_rq1[index]) { 399 skb_arr_rq1[index] = netdev_alloc_skb(dev, 400 EHEA_L_PKT_SIZE); 401 if (!skb_arr_rq1[index]) { 402 pr->rq1_skba.os_skbs = fill_wqes - i; 403 break; 404 } 405 } 406 index--; 407 index &= max_index_mask; 408 adder++; 409 } 410 411 if (adder == 0) 412 return; 413 414 /* Ring doorbell */ 415 ehea_update_rq1a(pr->qp, adder); 416 } 417 418 static void ehea_init_fill_rq1(struct ehea_port_res *pr, int nr_rq1a) 419 { 420 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 421 struct net_device *dev = pr->port->netdev; 422 int i; 423 424 if (nr_rq1a > pr->rq1_skba.len) { 425 netdev_err(dev, "NR_RQ1A bigger than skb array len\n"); 426 return; 427 } 428 429 for (i = 0; i < nr_rq1a; i++) { 430 skb_arr_rq1[i] = netdev_alloc_skb(dev, EHEA_L_PKT_SIZE); 431 if (!skb_arr_rq1[i]) 432 break; 433 } 434 /* Ring doorbell */ 435 ehea_update_rq1a(pr->qp, i - 1); 436 } 437 438 static int ehea_refill_rq_def(struct ehea_port_res *pr, 439 struct ehea_q_skb_arr *q_skba, int rq_nr, 440 int num_wqes, int wqe_type, int packet_size) 441 { 442 struct net_device *dev = pr->port->netdev; 443 struct ehea_qp *qp = pr->qp; 444 struct sk_buff **skb_arr = q_skba->arr; 445 struct ehea_rwqe *rwqe; 446 int i, index, max_index_mask, fill_wqes; 447 int adder = 0; 448 int ret = 0; 449 450 fill_wqes = q_skba->os_skbs + num_wqes; 451 q_skba->os_skbs = 0; 452 453 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 454 q_skba->os_skbs = fill_wqes; 455 return ret; 456 } 457 458 index = q_skba->index; 459 max_index_mask = q_skba->len - 1; 460 for (i = 0; i < fill_wqes; i++) { 461 u64 tmp_addr; 462 struct sk_buff *skb; 463 464 skb = netdev_alloc_skb_ip_align(dev, packet_size); 465 if (!skb) { 466 q_skba->os_skbs = fill_wqes - i; 467 if (q_skba->os_skbs == q_skba->len - 2) { 468 netdev_info(pr->port->netdev, 469 "rq%i ran dry - no mem for skb\n", 470 rq_nr); 471 ret = -ENOMEM; 472 } 473 break; 474 } 475 476 skb_arr[index] = skb; 477 tmp_addr = ehea_map_vaddr(skb->data); 478 if (tmp_addr == -1) { 479 dev_consume_skb_any(skb); 480 q_skba->os_skbs = fill_wqes - i; 481 ret = 0; 482 break; 483 } 484 485 rwqe = ehea_get_next_rwqe(qp, rq_nr); 486 rwqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, wqe_type) 487 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, index); 488 rwqe->sg_list[0].l_key = pr->recv_mr.lkey; 489 rwqe->sg_list[0].vaddr = tmp_addr; 490 rwqe->sg_list[0].len = packet_size; 491 rwqe->data_segments = 1; 492 493 index++; 494 index &= max_index_mask; 495 adder++; 496 } 497 498 q_skba->index = index; 499 if (adder == 0) 500 goto out; 501 502 /* Ring doorbell */ 503 iosync(); 504 if (rq_nr == 2) 505 ehea_update_rq2a(pr->qp, adder); 506 else 507 ehea_update_rq3a(pr->qp, adder); 508 out: 509 return ret; 510 } 511 512 513 static int ehea_refill_rq2(struct ehea_port_res *pr, int nr_of_wqes) 514 { 515 return ehea_refill_rq_def(pr, &pr->rq2_skba, 2, 516 nr_of_wqes, EHEA_RWQE2_TYPE, 517 EHEA_RQ2_PKT_SIZE); 518 } 519 520 521 static int ehea_refill_rq3(struct ehea_port_res *pr, int nr_of_wqes) 522 { 523 return ehea_refill_rq_def(pr, &pr->rq3_skba, 3, 524 nr_of_wqes, EHEA_RWQE3_TYPE, 525 EHEA_MAX_PACKET_SIZE); 526 } 527 528 static inline int ehea_check_cqe(struct ehea_cqe *cqe, int *rq_num) 529 { 530 *rq_num = (cqe->type & EHEA_CQE_TYPE_RQ) >> 5; 531 if ((cqe->status & EHEA_CQE_STAT_ERR_MASK) == 0) 532 return 0; 533 if (((cqe->status & EHEA_CQE_STAT_ERR_TCP) != 0) && 534 (cqe->header_length == 0)) 535 return 0; 536 return -EINVAL; 537 } 538 539 static inline void ehea_fill_skb(struct net_device *dev, 540 struct sk_buff *skb, struct ehea_cqe *cqe, 541 struct ehea_port_res *pr) 542 { 543 int length = cqe->num_bytes_transfered - 4; /*remove CRC */ 544 545 skb_put(skb, length); 546 skb->protocol = eth_type_trans(skb, dev); 547 548 /* The packet was not an IPV4 packet so a complemented checksum was 549 calculated. The value is found in the Internet Checksum field. */ 550 if (cqe->status & EHEA_CQE_BLIND_CKSUM) { 551 skb->ip_summed = CHECKSUM_COMPLETE; 552 skb->csum = csum_unfold(~cqe->inet_checksum_value); 553 } else 554 skb->ip_summed = CHECKSUM_UNNECESSARY; 555 556 skb_record_rx_queue(skb, pr - &pr->port->port_res[0]); 557 } 558 559 static inline struct sk_buff *get_skb_by_index(struct sk_buff **skb_array, 560 int arr_len, 561 struct ehea_cqe *cqe) 562 { 563 int skb_index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 564 struct sk_buff *skb; 565 void *pref; 566 int x; 567 568 x = skb_index + 1; 569 x &= (arr_len - 1); 570 571 pref = skb_array[x]; 572 if (pref) { 573 prefetchw(pref); 574 prefetchw(pref + EHEA_CACHE_LINE); 575 576 pref = (skb_array[x]->data); 577 prefetch(pref); 578 prefetch(pref + EHEA_CACHE_LINE); 579 prefetch(pref + EHEA_CACHE_LINE * 2); 580 prefetch(pref + EHEA_CACHE_LINE * 3); 581 } 582 583 skb = skb_array[skb_index]; 584 skb_array[skb_index] = NULL; 585 return skb; 586 } 587 588 static inline struct sk_buff *get_skb_by_index_ll(struct sk_buff **skb_array, 589 int arr_len, int wqe_index) 590 { 591 struct sk_buff *skb; 592 void *pref; 593 int x; 594 595 x = wqe_index + 1; 596 x &= (arr_len - 1); 597 598 pref = skb_array[x]; 599 if (pref) { 600 prefetchw(pref); 601 prefetchw(pref + EHEA_CACHE_LINE); 602 603 pref = (skb_array[x]->data); 604 prefetchw(pref); 605 prefetchw(pref + EHEA_CACHE_LINE); 606 } 607 608 skb = skb_array[wqe_index]; 609 skb_array[wqe_index] = NULL; 610 return skb; 611 } 612 613 static int ehea_treat_poll_error(struct ehea_port_res *pr, int rq, 614 struct ehea_cqe *cqe, int *processed_rq2, 615 int *processed_rq3) 616 { 617 struct sk_buff *skb; 618 619 if (cqe->status & EHEA_CQE_STAT_ERR_TCP) 620 pr->p_stats.err_tcp_cksum++; 621 if (cqe->status & EHEA_CQE_STAT_ERR_IP) 622 pr->p_stats.err_ip_cksum++; 623 if (cqe->status & EHEA_CQE_STAT_ERR_CRC) 624 pr->p_stats.err_frame_crc++; 625 626 if (rq == 2) { 627 *processed_rq2 += 1; 628 skb = get_skb_by_index(pr->rq2_skba.arr, pr->rq2_skba.len, cqe); 629 dev_kfree_skb(skb); 630 } else if (rq == 3) { 631 *processed_rq3 += 1; 632 skb = get_skb_by_index(pr->rq3_skba.arr, pr->rq3_skba.len, cqe); 633 dev_kfree_skb(skb); 634 } 635 636 if (cqe->status & EHEA_CQE_STAT_FAT_ERR_MASK) { 637 if (netif_msg_rx_err(pr->port)) { 638 pr_err("Critical receive error for QP %d. Resetting port.\n", 639 pr->qp->init_attr.qp_nr); 640 ehea_dump(cqe, sizeof(*cqe), "CQE"); 641 } 642 ehea_schedule_port_reset(pr->port); 643 return 1; 644 } 645 646 return 0; 647 } 648 649 static int ehea_proc_rwqes(struct net_device *dev, 650 struct ehea_port_res *pr, 651 int budget) 652 { 653 struct ehea_port *port = pr->port; 654 struct ehea_qp *qp = pr->qp; 655 struct ehea_cqe *cqe; 656 struct sk_buff *skb; 657 struct sk_buff **skb_arr_rq1 = pr->rq1_skba.arr; 658 struct sk_buff **skb_arr_rq2 = pr->rq2_skba.arr; 659 struct sk_buff **skb_arr_rq3 = pr->rq3_skba.arr; 660 int skb_arr_rq1_len = pr->rq1_skba.len; 661 int skb_arr_rq2_len = pr->rq2_skba.len; 662 int skb_arr_rq3_len = pr->rq3_skba.len; 663 int processed, processed_rq1, processed_rq2, processed_rq3; 664 u64 processed_bytes = 0; 665 int wqe_index, last_wqe_index, rq, port_reset; 666 667 processed = processed_rq1 = processed_rq2 = processed_rq3 = 0; 668 last_wqe_index = 0; 669 670 cqe = ehea_poll_rq1(qp, &wqe_index); 671 while ((processed < budget) && cqe) { 672 ehea_inc_rq1(qp); 673 processed_rq1++; 674 processed++; 675 if (netif_msg_rx_status(port)) 676 ehea_dump(cqe, sizeof(*cqe), "CQE"); 677 678 last_wqe_index = wqe_index; 679 rmb(); 680 if (!ehea_check_cqe(cqe, &rq)) { 681 if (rq == 1) { 682 /* LL RQ1 */ 683 skb = get_skb_by_index_ll(skb_arr_rq1, 684 skb_arr_rq1_len, 685 wqe_index); 686 if (unlikely(!skb)) { 687 netif_info(port, rx_err, dev, 688 "LL rq1: skb=NULL\n"); 689 690 skb = netdev_alloc_skb(dev, 691 EHEA_L_PKT_SIZE); 692 if (!skb) 693 break; 694 } 695 skb_copy_to_linear_data(skb, ((char *)cqe) + 64, 696 cqe->num_bytes_transfered - 4); 697 ehea_fill_skb(dev, skb, cqe, pr); 698 } else if (rq == 2) { 699 /* RQ2 */ 700 skb = get_skb_by_index(skb_arr_rq2, 701 skb_arr_rq2_len, cqe); 702 if (unlikely(!skb)) { 703 netif_err(port, rx_err, dev, 704 "rq2: skb=NULL\n"); 705 break; 706 } 707 ehea_fill_skb(dev, skb, cqe, pr); 708 processed_rq2++; 709 } else { 710 /* RQ3 */ 711 skb = get_skb_by_index(skb_arr_rq3, 712 skb_arr_rq3_len, cqe); 713 if (unlikely(!skb)) { 714 netif_err(port, rx_err, dev, 715 "rq3: skb=NULL\n"); 716 break; 717 } 718 ehea_fill_skb(dev, skb, cqe, pr); 719 processed_rq3++; 720 } 721 722 processed_bytes += skb->len; 723 724 if (cqe->status & EHEA_CQE_VLAN_TAG_XTRACT) 725 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 726 cqe->vlan_tag); 727 728 napi_gro_receive(&pr->napi, skb); 729 } else { 730 pr->p_stats.poll_receive_errors++; 731 port_reset = ehea_treat_poll_error(pr, rq, cqe, 732 &processed_rq2, 733 &processed_rq3); 734 if (port_reset) 735 break; 736 } 737 cqe = ehea_poll_rq1(qp, &wqe_index); 738 } 739 740 pr->rx_packets += processed; 741 pr->rx_bytes += processed_bytes; 742 743 ehea_refill_rq1(pr, last_wqe_index, processed_rq1); 744 ehea_refill_rq2(pr, processed_rq2); 745 ehea_refill_rq3(pr, processed_rq3); 746 747 return processed; 748 } 749 750 #define SWQE_RESTART_CHECK 0xdeadbeaff00d0000ull 751 752 static void reset_sq_restart_flag(struct ehea_port *port) 753 { 754 int i; 755 756 for (i = 0; i < port->num_def_qps; i++) { 757 struct ehea_port_res *pr = &port->port_res[i]; 758 pr->sq_restart_flag = 0; 759 } 760 wake_up(&port->restart_wq); 761 } 762 763 static void check_sqs(struct ehea_port *port) 764 { 765 struct ehea_swqe *swqe; 766 int swqe_index; 767 int i; 768 769 for (i = 0; i < port->num_def_qps; i++) { 770 struct ehea_port_res *pr = &port->port_res[i]; 771 int ret; 772 swqe = ehea_get_swqe(pr->qp, &swqe_index); 773 memset(swqe, 0, SWQE_HEADER_SIZE); 774 atomic_dec(&pr->swqe_avail); 775 776 swqe->tx_control |= EHEA_SWQE_PURGE; 777 swqe->wr_id = SWQE_RESTART_CHECK; 778 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 779 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT; 780 swqe->immediate_data_length = 80; 781 782 ehea_post_swqe(pr->qp, swqe); 783 784 ret = wait_event_timeout(port->restart_wq, 785 pr->sq_restart_flag == 0, 786 msecs_to_jiffies(100)); 787 788 if (!ret) { 789 pr_err("HW/SW queues out of sync\n"); 790 ehea_schedule_port_reset(pr->port); 791 return; 792 } 793 } 794 } 795 796 797 static struct ehea_cqe *ehea_proc_cqes(struct ehea_port_res *pr, int my_quota) 798 { 799 struct sk_buff *skb; 800 struct ehea_cq *send_cq = pr->send_cq; 801 struct ehea_cqe *cqe; 802 int quota = my_quota; 803 int cqe_counter = 0; 804 int swqe_av = 0; 805 int index; 806 struct netdev_queue *txq = netdev_get_tx_queue(pr->port->netdev, 807 pr - &pr->port->port_res[0]); 808 809 cqe = ehea_poll_cq(send_cq); 810 while (cqe && (quota > 0)) { 811 ehea_inc_cq(send_cq); 812 813 cqe_counter++; 814 rmb(); 815 816 if (cqe->wr_id == SWQE_RESTART_CHECK) { 817 pr->sq_restart_flag = 1; 818 swqe_av++; 819 break; 820 } 821 822 if (cqe->status & EHEA_CQE_STAT_ERR_MASK) { 823 pr_err("Bad send completion status=0x%04X\n", 824 cqe->status); 825 826 if (netif_msg_tx_err(pr->port)) 827 ehea_dump(cqe, sizeof(*cqe), "Send CQE"); 828 829 if (cqe->status & EHEA_CQE_STAT_RESET_MASK) { 830 pr_err("Resetting port\n"); 831 ehea_schedule_port_reset(pr->port); 832 break; 833 } 834 } 835 836 if (netif_msg_tx_done(pr->port)) 837 ehea_dump(cqe, sizeof(*cqe), "CQE"); 838 839 if (likely(EHEA_BMASK_GET(EHEA_WR_ID_TYPE, cqe->wr_id) 840 == EHEA_SWQE2_TYPE)) { 841 842 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, cqe->wr_id); 843 skb = pr->sq_skba.arr[index]; 844 dev_consume_skb_any(skb); 845 pr->sq_skba.arr[index] = NULL; 846 } 847 848 swqe_av += EHEA_BMASK_GET(EHEA_WR_ID_REFILL, cqe->wr_id); 849 quota--; 850 851 cqe = ehea_poll_cq(send_cq); 852 } 853 854 ehea_update_feca(send_cq, cqe_counter); 855 atomic_add(swqe_av, &pr->swqe_avail); 856 857 if (unlikely(netif_tx_queue_stopped(txq) && 858 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th))) { 859 __netif_tx_lock(txq, smp_processor_id()); 860 if (netif_tx_queue_stopped(txq) && 861 (atomic_read(&pr->swqe_avail) >= pr->swqe_refill_th)) 862 netif_tx_wake_queue(txq); 863 __netif_tx_unlock(txq); 864 } 865 866 wake_up(&pr->port->swqe_avail_wq); 867 868 return cqe; 869 } 870 871 #define EHEA_POLL_MAX_CQES 65535 872 873 static int ehea_poll(struct napi_struct *napi, int budget) 874 { 875 struct ehea_port_res *pr = container_of(napi, struct ehea_port_res, 876 napi); 877 struct net_device *dev = pr->port->netdev; 878 struct ehea_cqe *cqe; 879 struct ehea_cqe *cqe_skb = NULL; 880 int wqe_index; 881 int rx = 0; 882 883 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 884 rx += ehea_proc_rwqes(dev, pr, budget - rx); 885 886 while (rx != budget) { 887 napi_complete(napi); 888 ehea_reset_cq_ep(pr->recv_cq); 889 ehea_reset_cq_ep(pr->send_cq); 890 ehea_reset_cq_n1(pr->recv_cq); 891 ehea_reset_cq_n1(pr->send_cq); 892 rmb(); 893 cqe = ehea_poll_rq1(pr->qp, &wqe_index); 894 cqe_skb = ehea_poll_cq(pr->send_cq); 895 896 if (!cqe && !cqe_skb) 897 return rx; 898 899 if (!napi_reschedule(napi)) 900 return rx; 901 902 cqe_skb = ehea_proc_cqes(pr, EHEA_POLL_MAX_CQES); 903 rx += ehea_proc_rwqes(dev, pr, budget - rx); 904 } 905 906 return rx; 907 } 908 909 static irqreturn_t ehea_recv_irq_handler(int irq, void *param) 910 { 911 struct ehea_port_res *pr = param; 912 913 napi_schedule(&pr->napi); 914 915 return IRQ_HANDLED; 916 } 917 918 static irqreturn_t ehea_qp_aff_irq_handler(int irq, void *param) 919 { 920 struct ehea_port *port = param; 921 struct ehea_eqe *eqe; 922 struct ehea_qp *qp; 923 u32 qp_token; 924 u64 resource_type, aer, aerr; 925 int reset_port = 0; 926 927 eqe = ehea_poll_eq(port->qp_eq); 928 929 while (eqe) { 930 qp_token = EHEA_BMASK_GET(EHEA_EQE_QP_TOKEN, eqe->entry); 931 pr_err("QP aff_err: entry=0x%llx, token=0x%x\n", 932 eqe->entry, qp_token); 933 934 qp = port->port_res[qp_token].qp; 935 936 resource_type = ehea_error_data(port->adapter, qp->fw_handle, 937 &aer, &aerr); 938 939 if (resource_type == EHEA_AER_RESTYPE_QP) { 940 if ((aer & EHEA_AER_RESET_MASK) || 941 (aerr & EHEA_AERR_RESET_MASK)) 942 reset_port = 1; 943 } else 944 reset_port = 1; /* Reset in case of CQ or EQ error */ 945 946 eqe = ehea_poll_eq(port->qp_eq); 947 } 948 949 if (reset_port) { 950 pr_err("Resetting port\n"); 951 ehea_schedule_port_reset(port); 952 } 953 954 return IRQ_HANDLED; 955 } 956 957 static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter, 958 int logical_port) 959 { 960 int i; 961 962 for (i = 0; i < EHEA_MAX_PORTS; i++) 963 if (adapter->port[i]) 964 if (adapter->port[i]->logical_port_id == logical_port) 965 return adapter->port[i]; 966 return NULL; 967 } 968 969 int ehea_sense_port_attr(struct ehea_port *port) 970 { 971 int ret; 972 u64 hret; 973 struct hcp_ehea_port_cb0 *cb0; 974 975 /* may be called via ehea_neq_tasklet() */ 976 cb0 = (void *)get_zeroed_page(GFP_ATOMIC); 977 if (!cb0) { 978 pr_err("no mem for cb0\n"); 979 ret = -ENOMEM; 980 goto out; 981 } 982 983 hret = ehea_h_query_ehea_port(port->adapter->handle, 984 port->logical_port_id, H_PORT_CB0, 985 EHEA_BMASK_SET(H_PORT_CB0_ALL, 0xFFFF), 986 cb0); 987 if (hret != H_SUCCESS) { 988 ret = -EIO; 989 goto out_free; 990 } 991 992 /* MAC address */ 993 port->mac_addr = cb0->port_mac_addr << 16; 994 995 if (!is_valid_ether_addr((u8 *)&port->mac_addr)) { 996 ret = -EADDRNOTAVAIL; 997 goto out_free; 998 } 999 1000 /* Port speed */ 1001 switch (cb0->port_speed) { 1002 case H_SPEED_10M_H: 1003 port->port_speed = EHEA_SPEED_10M; 1004 port->full_duplex = 0; 1005 break; 1006 case H_SPEED_10M_F: 1007 port->port_speed = EHEA_SPEED_10M; 1008 port->full_duplex = 1; 1009 break; 1010 case H_SPEED_100M_H: 1011 port->port_speed = EHEA_SPEED_100M; 1012 port->full_duplex = 0; 1013 break; 1014 case H_SPEED_100M_F: 1015 port->port_speed = EHEA_SPEED_100M; 1016 port->full_duplex = 1; 1017 break; 1018 case H_SPEED_1G_F: 1019 port->port_speed = EHEA_SPEED_1G; 1020 port->full_duplex = 1; 1021 break; 1022 case H_SPEED_10G_F: 1023 port->port_speed = EHEA_SPEED_10G; 1024 port->full_duplex = 1; 1025 break; 1026 default: 1027 port->port_speed = 0; 1028 port->full_duplex = 0; 1029 break; 1030 } 1031 1032 port->autoneg = 1; 1033 port->num_mcs = cb0->num_default_qps; 1034 1035 /* Number of default QPs */ 1036 if (use_mcs) 1037 port->num_def_qps = cb0->num_default_qps; 1038 else 1039 port->num_def_qps = 1; 1040 1041 if (!port->num_def_qps) { 1042 ret = -EINVAL; 1043 goto out_free; 1044 } 1045 1046 ret = 0; 1047 out_free: 1048 if (ret || netif_msg_probe(port)) 1049 ehea_dump(cb0, sizeof(*cb0), "ehea_sense_port_attr"); 1050 free_page((unsigned long)cb0); 1051 out: 1052 return ret; 1053 } 1054 1055 int ehea_set_portspeed(struct ehea_port *port, u32 port_speed) 1056 { 1057 struct hcp_ehea_port_cb4 *cb4; 1058 u64 hret; 1059 int ret = 0; 1060 1061 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 1062 if (!cb4) { 1063 pr_err("no mem for cb4\n"); 1064 ret = -ENOMEM; 1065 goto out; 1066 } 1067 1068 cb4->port_speed = port_speed; 1069 1070 netif_carrier_off(port->netdev); 1071 1072 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1073 port->logical_port_id, 1074 H_PORT_CB4, H_PORT_CB4_SPEED, cb4); 1075 if (hret == H_SUCCESS) { 1076 port->autoneg = port_speed == EHEA_SPEED_AUTONEG ? 1 : 0; 1077 1078 hret = ehea_h_query_ehea_port(port->adapter->handle, 1079 port->logical_port_id, 1080 H_PORT_CB4, H_PORT_CB4_SPEED, 1081 cb4); 1082 if (hret == H_SUCCESS) { 1083 switch (cb4->port_speed) { 1084 case H_SPEED_10M_H: 1085 port->port_speed = EHEA_SPEED_10M; 1086 port->full_duplex = 0; 1087 break; 1088 case H_SPEED_10M_F: 1089 port->port_speed = EHEA_SPEED_10M; 1090 port->full_duplex = 1; 1091 break; 1092 case H_SPEED_100M_H: 1093 port->port_speed = EHEA_SPEED_100M; 1094 port->full_duplex = 0; 1095 break; 1096 case H_SPEED_100M_F: 1097 port->port_speed = EHEA_SPEED_100M; 1098 port->full_duplex = 1; 1099 break; 1100 case H_SPEED_1G_F: 1101 port->port_speed = EHEA_SPEED_1G; 1102 port->full_duplex = 1; 1103 break; 1104 case H_SPEED_10G_F: 1105 port->port_speed = EHEA_SPEED_10G; 1106 port->full_duplex = 1; 1107 break; 1108 default: 1109 port->port_speed = 0; 1110 port->full_duplex = 0; 1111 break; 1112 } 1113 } else { 1114 pr_err("Failed sensing port speed\n"); 1115 ret = -EIO; 1116 } 1117 } else { 1118 if (hret == H_AUTHORITY) { 1119 pr_info("Hypervisor denied setting port speed\n"); 1120 ret = -EPERM; 1121 } else { 1122 ret = -EIO; 1123 pr_err("Failed setting port speed\n"); 1124 } 1125 } 1126 if (!prop_carrier_state || (port->phy_link == EHEA_PHY_LINK_UP)) 1127 netif_carrier_on(port->netdev); 1128 1129 free_page((unsigned long)cb4); 1130 out: 1131 return ret; 1132 } 1133 1134 static void ehea_parse_eqe(struct ehea_adapter *adapter, u64 eqe) 1135 { 1136 int ret; 1137 u8 ec; 1138 u8 portnum; 1139 struct ehea_port *port; 1140 struct net_device *dev; 1141 1142 ec = EHEA_BMASK_GET(NEQE_EVENT_CODE, eqe); 1143 portnum = EHEA_BMASK_GET(NEQE_PORTNUM, eqe); 1144 port = ehea_get_port(adapter, portnum); 1145 if (!port) { 1146 netdev_err(NULL, "unknown portnum %x\n", portnum); 1147 return; 1148 } 1149 dev = port->netdev; 1150 1151 switch (ec) { 1152 case EHEA_EC_PORTSTATE_CHG: /* port state change */ 1153 1154 if (EHEA_BMASK_GET(NEQE_PORT_UP, eqe)) { 1155 if (!netif_carrier_ok(dev)) { 1156 ret = ehea_sense_port_attr(port); 1157 if (ret) { 1158 netdev_err(dev, "failed resensing port attributes\n"); 1159 break; 1160 } 1161 1162 netif_info(port, link, dev, 1163 "Logical port up: %dMbps %s Duplex\n", 1164 port->port_speed, 1165 port->full_duplex == 1 ? 1166 "Full" : "Half"); 1167 1168 netif_carrier_on(dev); 1169 netif_wake_queue(dev); 1170 } 1171 } else 1172 if (netif_carrier_ok(dev)) { 1173 netif_info(port, link, dev, 1174 "Logical port down\n"); 1175 netif_carrier_off(dev); 1176 netif_tx_disable(dev); 1177 } 1178 1179 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PORT_UP, eqe)) { 1180 port->phy_link = EHEA_PHY_LINK_UP; 1181 netif_info(port, link, dev, 1182 "Physical port up\n"); 1183 if (prop_carrier_state) 1184 netif_carrier_on(dev); 1185 } else { 1186 port->phy_link = EHEA_PHY_LINK_DOWN; 1187 netif_info(port, link, dev, 1188 "Physical port down\n"); 1189 if (prop_carrier_state) 1190 netif_carrier_off(dev); 1191 } 1192 1193 if (EHEA_BMASK_GET(NEQE_EXTSWITCH_PRIMARY, eqe)) 1194 netdev_info(dev, 1195 "External switch port is primary port\n"); 1196 else 1197 netdev_info(dev, 1198 "External switch port is backup port\n"); 1199 1200 break; 1201 case EHEA_EC_ADAPTER_MALFUNC: 1202 netdev_err(dev, "Adapter malfunction\n"); 1203 break; 1204 case EHEA_EC_PORT_MALFUNC: 1205 netdev_info(dev, "Port malfunction\n"); 1206 netif_carrier_off(dev); 1207 netif_tx_disable(dev); 1208 break; 1209 default: 1210 netdev_err(dev, "unknown event code %x, eqe=0x%llX\n", ec, eqe); 1211 break; 1212 } 1213 } 1214 1215 static void ehea_neq_tasklet(unsigned long data) 1216 { 1217 struct ehea_adapter *adapter = (struct ehea_adapter *)data; 1218 struct ehea_eqe *eqe; 1219 u64 event_mask; 1220 1221 eqe = ehea_poll_eq(adapter->neq); 1222 pr_debug("eqe=%p\n", eqe); 1223 1224 while (eqe) { 1225 pr_debug("*eqe=%lx\n", (unsigned long) eqe->entry); 1226 ehea_parse_eqe(adapter, eqe->entry); 1227 eqe = ehea_poll_eq(adapter->neq); 1228 pr_debug("next eqe=%p\n", eqe); 1229 } 1230 1231 event_mask = EHEA_BMASK_SET(NELR_PORTSTATE_CHG, 1) 1232 | EHEA_BMASK_SET(NELR_ADAPTER_MALFUNC, 1) 1233 | EHEA_BMASK_SET(NELR_PORT_MALFUNC, 1); 1234 1235 ehea_h_reset_events(adapter->handle, 1236 adapter->neq->fw_handle, event_mask); 1237 } 1238 1239 static irqreturn_t ehea_interrupt_neq(int irq, void *param) 1240 { 1241 struct ehea_adapter *adapter = param; 1242 tasklet_hi_schedule(&adapter->neq_tasklet); 1243 return IRQ_HANDLED; 1244 } 1245 1246 1247 static int ehea_fill_port_res(struct ehea_port_res *pr) 1248 { 1249 int ret; 1250 struct ehea_qp_init_attr *init_attr = &pr->qp->init_attr; 1251 1252 ehea_init_fill_rq1(pr, pr->rq1_skba.len); 1253 1254 ret = ehea_refill_rq2(pr, init_attr->act_nr_rwqes_rq2 - 1); 1255 1256 ret |= ehea_refill_rq3(pr, init_attr->act_nr_rwqes_rq3 - 1); 1257 1258 return ret; 1259 } 1260 1261 static int ehea_reg_interrupts(struct net_device *dev) 1262 { 1263 struct ehea_port *port = netdev_priv(dev); 1264 struct ehea_port_res *pr; 1265 int i, ret; 1266 1267 1268 snprintf(port->int_aff_name, EHEA_IRQ_NAME_SIZE - 1, "%s-aff", 1269 dev->name); 1270 1271 ret = ibmebus_request_irq(port->qp_eq->attr.ist1, 1272 ehea_qp_aff_irq_handler, 1273 0, port->int_aff_name, port); 1274 if (ret) { 1275 netdev_err(dev, "failed registering irq for qp_aff_irq_handler:ist=%X\n", 1276 port->qp_eq->attr.ist1); 1277 goto out_free_qpeq; 1278 } 1279 1280 netif_info(port, ifup, dev, 1281 "irq_handle 0x%X for function qp_aff_irq_handler registered\n", 1282 port->qp_eq->attr.ist1); 1283 1284 1285 for (i = 0; i < port->num_def_qps; i++) { 1286 pr = &port->port_res[i]; 1287 snprintf(pr->int_send_name, EHEA_IRQ_NAME_SIZE - 1, 1288 "%s-queue%d", dev->name, i); 1289 ret = ibmebus_request_irq(pr->eq->attr.ist1, 1290 ehea_recv_irq_handler, 1291 0, pr->int_send_name, pr); 1292 if (ret) { 1293 netdev_err(dev, "failed registering irq for ehea_queue port_res_nr:%d, ist=%X\n", 1294 i, pr->eq->attr.ist1); 1295 goto out_free_req; 1296 } 1297 netif_info(port, ifup, dev, 1298 "irq_handle 0x%X for function ehea_queue_int %d registered\n", 1299 pr->eq->attr.ist1, i); 1300 } 1301 out: 1302 return ret; 1303 1304 1305 out_free_req: 1306 while (--i >= 0) { 1307 u32 ist = port->port_res[i].eq->attr.ist1; 1308 ibmebus_free_irq(ist, &port->port_res[i]); 1309 } 1310 1311 out_free_qpeq: 1312 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1313 i = port->num_def_qps; 1314 1315 goto out; 1316 1317 } 1318 1319 static void ehea_free_interrupts(struct net_device *dev) 1320 { 1321 struct ehea_port *port = netdev_priv(dev); 1322 struct ehea_port_res *pr; 1323 int i; 1324 1325 /* send */ 1326 1327 for (i = 0; i < port->num_def_qps; i++) { 1328 pr = &port->port_res[i]; 1329 ibmebus_free_irq(pr->eq->attr.ist1, pr); 1330 netif_info(port, intr, dev, 1331 "free send irq for res %d with handle 0x%X\n", 1332 i, pr->eq->attr.ist1); 1333 } 1334 1335 /* associated events */ 1336 ibmebus_free_irq(port->qp_eq->attr.ist1, port); 1337 netif_info(port, intr, dev, 1338 "associated event interrupt for handle 0x%X freed\n", 1339 port->qp_eq->attr.ist1); 1340 } 1341 1342 static int ehea_configure_port(struct ehea_port *port) 1343 { 1344 int ret, i; 1345 u64 hret, mask; 1346 struct hcp_ehea_port_cb0 *cb0; 1347 1348 ret = -ENOMEM; 1349 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1350 if (!cb0) 1351 goto out; 1352 1353 cb0->port_rc = EHEA_BMASK_SET(PXLY_RC_VALID, 1) 1354 | EHEA_BMASK_SET(PXLY_RC_IP_CHKSUM, 1) 1355 | EHEA_BMASK_SET(PXLY_RC_TCP_UDP_CHKSUM, 1) 1356 | EHEA_BMASK_SET(PXLY_RC_VLAN_XTRACT, 1) 1357 | EHEA_BMASK_SET(PXLY_RC_VLAN_TAG_FILTER, 1358 PXLY_RC_VLAN_FILTER) 1359 | EHEA_BMASK_SET(PXLY_RC_JUMBO_FRAME, 1); 1360 1361 for (i = 0; i < port->num_mcs; i++) 1362 if (use_mcs) 1363 cb0->default_qpn_arr[i] = 1364 port->port_res[i].qp->init_attr.qp_nr; 1365 else 1366 cb0->default_qpn_arr[i] = 1367 port->port_res[0].qp->init_attr.qp_nr; 1368 1369 if (netif_msg_ifup(port)) 1370 ehea_dump(cb0, sizeof(*cb0), "ehea_configure_port"); 1371 1372 mask = EHEA_BMASK_SET(H_PORT_CB0_PRC, 1) 1373 | EHEA_BMASK_SET(H_PORT_CB0_DEFQPNARRAY, 1); 1374 1375 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1376 port->logical_port_id, 1377 H_PORT_CB0, mask, cb0); 1378 ret = -EIO; 1379 if (hret != H_SUCCESS) 1380 goto out_free; 1381 1382 ret = 0; 1383 1384 out_free: 1385 free_page((unsigned long)cb0); 1386 out: 1387 return ret; 1388 } 1389 1390 static int ehea_gen_smrs(struct ehea_port_res *pr) 1391 { 1392 int ret; 1393 struct ehea_adapter *adapter = pr->port->adapter; 1394 1395 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->send_mr); 1396 if (ret) 1397 goto out; 1398 1399 ret = ehea_gen_smr(adapter, &adapter->mr, &pr->recv_mr); 1400 if (ret) 1401 goto out_free; 1402 1403 return 0; 1404 1405 out_free: 1406 ehea_rem_mr(&pr->send_mr); 1407 out: 1408 pr_err("Generating SMRS failed\n"); 1409 return -EIO; 1410 } 1411 1412 static int ehea_rem_smrs(struct ehea_port_res *pr) 1413 { 1414 if ((ehea_rem_mr(&pr->send_mr)) || 1415 (ehea_rem_mr(&pr->recv_mr))) 1416 return -EIO; 1417 else 1418 return 0; 1419 } 1420 1421 static int ehea_init_q_skba(struct ehea_q_skb_arr *q_skba, int max_q_entries) 1422 { 1423 int arr_size = sizeof(void *) * max_q_entries; 1424 1425 q_skba->arr = vzalloc(arr_size); 1426 if (!q_skba->arr) 1427 return -ENOMEM; 1428 1429 q_skba->len = max_q_entries; 1430 q_skba->index = 0; 1431 q_skba->os_skbs = 0; 1432 1433 return 0; 1434 } 1435 1436 static int ehea_init_port_res(struct ehea_port *port, struct ehea_port_res *pr, 1437 struct port_res_cfg *pr_cfg, int queue_token) 1438 { 1439 struct ehea_adapter *adapter = port->adapter; 1440 enum ehea_eq_type eq_type = EHEA_EQ; 1441 struct ehea_qp_init_attr *init_attr = NULL; 1442 int ret = -EIO; 1443 u64 tx_bytes, rx_bytes, tx_packets, rx_packets; 1444 1445 tx_bytes = pr->tx_bytes; 1446 tx_packets = pr->tx_packets; 1447 rx_bytes = pr->rx_bytes; 1448 rx_packets = pr->rx_packets; 1449 1450 memset(pr, 0, sizeof(struct ehea_port_res)); 1451 1452 pr->tx_bytes = tx_bytes; 1453 pr->tx_packets = tx_packets; 1454 pr->rx_bytes = rx_bytes; 1455 pr->rx_packets = rx_packets; 1456 1457 pr->port = port; 1458 1459 pr->eq = ehea_create_eq(adapter, eq_type, EHEA_MAX_ENTRIES_EQ, 0); 1460 if (!pr->eq) { 1461 pr_err("create_eq failed (eq)\n"); 1462 goto out_free; 1463 } 1464 1465 pr->recv_cq = ehea_create_cq(adapter, pr_cfg->max_entries_rcq, 1466 pr->eq->fw_handle, 1467 port->logical_port_id); 1468 if (!pr->recv_cq) { 1469 pr_err("create_cq failed (cq_recv)\n"); 1470 goto out_free; 1471 } 1472 1473 pr->send_cq = ehea_create_cq(adapter, pr_cfg->max_entries_scq, 1474 pr->eq->fw_handle, 1475 port->logical_port_id); 1476 if (!pr->send_cq) { 1477 pr_err("create_cq failed (cq_send)\n"); 1478 goto out_free; 1479 } 1480 1481 if (netif_msg_ifup(port)) 1482 pr_info("Send CQ: act_nr_cqes=%d, Recv CQ: act_nr_cqes=%d\n", 1483 pr->send_cq->attr.act_nr_of_cqes, 1484 pr->recv_cq->attr.act_nr_of_cqes); 1485 1486 init_attr = kzalloc(sizeof(*init_attr), GFP_KERNEL); 1487 if (!init_attr) { 1488 ret = -ENOMEM; 1489 pr_err("no mem for ehea_qp_init_attr\n"); 1490 goto out_free; 1491 } 1492 1493 init_attr->low_lat_rq1 = 1; 1494 init_attr->signalingtype = 1; /* generate CQE if specified in WQE */ 1495 init_attr->rq_count = 3; 1496 init_attr->qp_token = queue_token; 1497 init_attr->max_nr_send_wqes = pr_cfg->max_entries_sq; 1498 init_attr->max_nr_rwqes_rq1 = pr_cfg->max_entries_rq1; 1499 init_attr->max_nr_rwqes_rq2 = pr_cfg->max_entries_rq2; 1500 init_attr->max_nr_rwqes_rq3 = pr_cfg->max_entries_rq3; 1501 init_attr->wqe_size_enc_sq = EHEA_SG_SQ; 1502 init_attr->wqe_size_enc_rq1 = EHEA_SG_RQ1; 1503 init_attr->wqe_size_enc_rq2 = EHEA_SG_RQ2; 1504 init_attr->wqe_size_enc_rq3 = EHEA_SG_RQ3; 1505 init_attr->rq2_threshold = EHEA_RQ2_THRESHOLD; 1506 init_attr->rq3_threshold = EHEA_RQ3_THRESHOLD; 1507 init_attr->port_nr = port->logical_port_id; 1508 init_attr->send_cq_handle = pr->send_cq->fw_handle; 1509 init_attr->recv_cq_handle = pr->recv_cq->fw_handle; 1510 init_attr->aff_eq_handle = port->qp_eq->fw_handle; 1511 1512 pr->qp = ehea_create_qp(adapter, adapter->pd, init_attr); 1513 if (!pr->qp) { 1514 pr_err("create_qp failed\n"); 1515 ret = -EIO; 1516 goto out_free; 1517 } 1518 1519 if (netif_msg_ifup(port)) 1520 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", 1521 init_attr->qp_nr, 1522 init_attr->act_nr_send_wqes, 1523 init_attr->act_nr_rwqes_rq1, 1524 init_attr->act_nr_rwqes_rq2, 1525 init_attr->act_nr_rwqes_rq3); 1526 1527 pr->sq_skba_size = init_attr->act_nr_send_wqes + 1; 1528 1529 ret = ehea_init_q_skba(&pr->sq_skba, pr->sq_skba_size); 1530 ret |= ehea_init_q_skba(&pr->rq1_skba, init_attr->act_nr_rwqes_rq1 + 1); 1531 ret |= ehea_init_q_skba(&pr->rq2_skba, init_attr->act_nr_rwqes_rq2 + 1); 1532 ret |= ehea_init_q_skba(&pr->rq3_skba, init_attr->act_nr_rwqes_rq3 + 1); 1533 if (ret) 1534 goto out_free; 1535 1536 pr->swqe_refill_th = init_attr->act_nr_send_wqes / 10; 1537 if (ehea_gen_smrs(pr) != 0) { 1538 ret = -EIO; 1539 goto out_free; 1540 } 1541 1542 atomic_set(&pr->swqe_avail, init_attr->act_nr_send_wqes - 1); 1543 1544 kfree(init_attr); 1545 1546 netif_napi_add(pr->port->netdev, &pr->napi, ehea_poll, 64); 1547 1548 ret = 0; 1549 goto out; 1550 1551 out_free: 1552 kfree(init_attr); 1553 vfree(pr->sq_skba.arr); 1554 vfree(pr->rq1_skba.arr); 1555 vfree(pr->rq2_skba.arr); 1556 vfree(pr->rq3_skba.arr); 1557 ehea_destroy_qp(pr->qp); 1558 ehea_destroy_cq(pr->send_cq); 1559 ehea_destroy_cq(pr->recv_cq); 1560 ehea_destroy_eq(pr->eq); 1561 out: 1562 return ret; 1563 } 1564 1565 static int ehea_clean_portres(struct ehea_port *port, struct ehea_port_res *pr) 1566 { 1567 int ret, i; 1568 1569 if (pr->qp) 1570 netif_napi_del(&pr->napi); 1571 1572 ret = ehea_destroy_qp(pr->qp); 1573 1574 if (!ret) { 1575 ehea_destroy_cq(pr->send_cq); 1576 ehea_destroy_cq(pr->recv_cq); 1577 ehea_destroy_eq(pr->eq); 1578 1579 for (i = 0; i < pr->rq1_skba.len; i++) 1580 dev_kfree_skb(pr->rq1_skba.arr[i]); 1581 1582 for (i = 0; i < pr->rq2_skba.len; i++) 1583 dev_kfree_skb(pr->rq2_skba.arr[i]); 1584 1585 for (i = 0; i < pr->rq3_skba.len; i++) 1586 dev_kfree_skb(pr->rq3_skba.arr[i]); 1587 1588 for (i = 0; i < pr->sq_skba.len; i++) 1589 dev_kfree_skb(pr->sq_skba.arr[i]); 1590 1591 vfree(pr->rq1_skba.arr); 1592 vfree(pr->rq2_skba.arr); 1593 vfree(pr->rq3_skba.arr); 1594 vfree(pr->sq_skba.arr); 1595 ret = ehea_rem_smrs(pr); 1596 } 1597 return ret; 1598 } 1599 1600 static void write_swqe2_immediate(struct sk_buff *skb, struct ehea_swqe *swqe, 1601 u32 lkey) 1602 { 1603 int skb_data_size = skb_headlen(skb); 1604 u8 *imm_data = &swqe->u.immdata_desc.immediate_data[0]; 1605 struct ehea_vsgentry *sg1entry = &swqe->u.immdata_desc.sg_entry; 1606 unsigned int immediate_len = SWQE2_MAX_IMM; 1607 1608 swqe->descriptors = 0; 1609 1610 if (skb_is_gso(skb)) { 1611 swqe->tx_control |= EHEA_SWQE_TSO; 1612 swqe->mss = skb_shinfo(skb)->gso_size; 1613 /* 1614 * For TSO packets we only copy the headers into the 1615 * immediate area. 1616 */ 1617 immediate_len = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb); 1618 } 1619 1620 if (skb_is_gso(skb) || skb_data_size >= SWQE2_MAX_IMM) { 1621 skb_copy_from_linear_data(skb, imm_data, immediate_len); 1622 swqe->immediate_data_length = immediate_len; 1623 1624 if (skb_data_size > immediate_len) { 1625 sg1entry->l_key = lkey; 1626 sg1entry->len = skb_data_size - immediate_len; 1627 sg1entry->vaddr = 1628 ehea_map_vaddr(skb->data + immediate_len); 1629 swqe->descriptors++; 1630 } 1631 } else { 1632 skb_copy_from_linear_data(skb, imm_data, skb_data_size); 1633 swqe->immediate_data_length = skb_data_size; 1634 } 1635 } 1636 1637 static inline void write_swqe2_data(struct sk_buff *skb, struct net_device *dev, 1638 struct ehea_swqe *swqe, u32 lkey) 1639 { 1640 struct ehea_vsgentry *sg_list, *sg1entry, *sgentry; 1641 skb_frag_t *frag; 1642 int nfrags, sg1entry_contains_frag_data, i; 1643 1644 nfrags = skb_shinfo(skb)->nr_frags; 1645 sg1entry = &swqe->u.immdata_desc.sg_entry; 1646 sg_list = (struct ehea_vsgentry *)&swqe->u.immdata_desc.sg_list; 1647 sg1entry_contains_frag_data = 0; 1648 1649 write_swqe2_immediate(skb, swqe, lkey); 1650 1651 /* write descriptors */ 1652 if (nfrags > 0) { 1653 if (swqe->descriptors == 0) { 1654 /* sg1entry not yet used */ 1655 frag = &skb_shinfo(skb)->frags[0]; 1656 1657 /* copy sg1entry data */ 1658 sg1entry->l_key = lkey; 1659 sg1entry->len = skb_frag_size(frag); 1660 sg1entry->vaddr = 1661 ehea_map_vaddr(skb_frag_address(frag)); 1662 swqe->descriptors++; 1663 sg1entry_contains_frag_data = 1; 1664 } 1665 1666 for (i = sg1entry_contains_frag_data; i < nfrags; i++) { 1667 1668 frag = &skb_shinfo(skb)->frags[i]; 1669 sgentry = &sg_list[i - sg1entry_contains_frag_data]; 1670 1671 sgentry->l_key = lkey; 1672 sgentry->len = skb_frag_size(frag); 1673 sgentry->vaddr = ehea_map_vaddr(skb_frag_address(frag)); 1674 swqe->descriptors++; 1675 } 1676 } 1677 } 1678 1679 static int ehea_broadcast_reg_helper(struct ehea_port *port, u32 hcallid) 1680 { 1681 int ret = 0; 1682 u64 hret; 1683 u8 reg_type; 1684 1685 /* De/Register untagged packets */ 1686 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_UNTAGGED; 1687 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1688 port->logical_port_id, 1689 reg_type, port->mac_addr, 0, hcallid); 1690 if (hret != H_SUCCESS) { 1691 pr_err("%sregistering bc address failed (tagged)\n", 1692 hcallid == H_REG_BCMC ? "" : "de"); 1693 ret = -EIO; 1694 goto out_herr; 1695 } 1696 1697 /* De/Register VLAN packets */ 1698 reg_type = EHEA_BCMC_BROADCAST | EHEA_BCMC_VLANID_ALL; 1699 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1700 port->logical_port_id, 1701 reg_type, port->mac_addr, 0, hcallid); 1702 if (hret != H_SUCCESS) { 1703 pr_err("%sregistering bc address failed (vlan)\n", 1704 hcallid == H_REG_BCMC ? "" : "de"); 1705 ret = -EIO; 1706 } 1707 out_herr: 1708 return ret; 1709 } 1710 1711 static int ehea_set_mac_addr(struct net_device *dev, void *sa) 1712 { 1713 struct ehea_port *port = netdev_priv(dev); 1714 struct sockaddr *mac_addr = sa; 1715 struct hcp_ehea_port_cb0 *cb0; 1716 int ret; 1717 u64 hret; 1718 1719 if (!is_valid_ether_addr(mac_addr->sa_data)) { 1720 ret = -EADDRNOTAVAIL; 1721 goto out; 1722 } 1723 1724 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 1725 if (!cb0) { 1726 pr_err("no mem for cb0\n"); 1727 ret = -ENOMEM; 1728 goto out; 1729 } 1730 1731 memcpy(&(cb0->port_mac_addr), &(mac_addr->sa_data[0]), ETH_ALEN); 1732 1733 cb0->port_mac_addr = cb0->port_mac_addr >> 16; 1734 1735 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1736 port->logical_port_id, H_PORT_CB0, 1737 EHEA_BMASK_SET(H_PORT_CB0_MAC, 1), cb0); 1738 if (hret != H_SUCCESS) { 1739 ret = -EIO; 1740 goto out_free; 1741 } 1742 1743 memcpy(dev->dev_addr, mac_addr->sa_data, dev->addr_len); 1744 1745 /* Deregister old MAC in pHYP */ 1746 if (port->state == EHEA_PORT_UP) { 1747 ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 1748 if (ret) 1749 goto out_upregs; 1750 } 1751 1752 port->mac_addr = cb0->port_mac_addr << 16; 1753 1754 /* Register new MAC in pHYP */ 1755 if (port->state == EHEA_PORT_UP) { 1756 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 1757 if (ret) 1758 goto out_upregs; 1759 } 1760 1761 ret = 0; 1762 1763 out_upregs: 1764 ehea_update_bcmc_registrations(); 1765 out_free: 1766 free_page((unsigned long)cb0); 1767 out: 1768 return ret; 1769 } 1770 1771 static void ehea_promiscuous_error(u64 hret, int enable) 1772 { 1773 if (hret == H_AUTHORITY) 1774 pr_info("Hypervisor denied %sabling promiscuous mode\n", 1775 enable == 1 ? "en" : "dis"); 1776 else 1777 pr_err("failed %sabling promiscuous mode\n", 1778 enable == 1 ? "en" : "dis"); 1779 } 1780 1781 static void ehea_promiscuous(struct net_device *dev, int enable) 1782 { 1783 struct ehea_port *port = netdev_priv(dev); 1784 struct hcp_ehea_port_cb7 *cb7; 1785 u64 hret; 1786 1787 if (enable == port->promisc) 1788 return; 1789 1790 cb7 = (void *)get_zeroed_page(GFP_ATOMIC); 1791 if (!cb7) { 1792 pr_err("no mem for cb7\n"); 1793 goto out; 1794 } 1795 1796 /* Modify Pxs_DUCQPN in CB7 */ 1797 cb7->def_uc_qpn = enable == 1 ? port->port_res[0].qp->fw_handle : 0; 1798 1799 hret = ehea_h_modify_ehea_port(port->adapter->handle, 1800 port->logical_port_id, 1801 H_PORT_CB7, H_PORT_CB7_DUCQPN, cb7); 1802 if (hret) { 1803 ehea_promiscuous_error(hret, enable); 1804 goto out; 1805 } 1806 1807 port->promisc = enable; 1808 out: 1809 free_page((unsigned long)cb7); 1810 } 1811 1812 static u64 ehea_multicast_reg_helper(struct ehea_port *port, u64 mc_mac_addr, 1813 u32 hcallid) 1814 { 1815 u64 hret; 1816 u8 reg_type; 1817 1818 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_UNTAGGED; 1819 if (mc_mac_addr == 0) 1820 reg_type |= EHEA_BCMC_SCOPE_ALL; 1821 1822 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1823 port->logical_port_id, 1824 reg_type, mc_mac_addr, 0, hcallid); 1825 if (hret) 1826 goto out; 1827 1828 reg_type = EHEA_BCMC_MULTICAST | EHEA_BCMC_VLANID_ALL; 1829 if (mc_mac_addr == 0) 1830 reg_type |= EHEA_BCMC_SCOPE_ALL; 1831 1832 hret = ehea_h_reg_dereg_bcmc(port->adapter->handle, 1833 port->logical_port_id, 1834 reg_type, mc_mac_addr, 0, hcallid); 1835 out: 1836 return hret; 1837 } 1838 1839 static int ehea_drop_multicast_list(struct net_device *dev) 1840 { 1841 struct ehea_port *port = netdev_priv(dev); 1842 struct ehea_mc_list *mc_entry = port->mc_list; 1843 struct list_head *pos; 1844 struct list_head *temp; 1845 int ret = 0; 1846 u64 hret; 1847 1848 list_for_each_safe(pos, temp, &(port->mc_list->list)) { 1849 mc_entry = list_entry(pos, struct ehea_mc_list, list); 1850 1851 hret = ehea_multicast_reg_helper(port, mc_entry->macaddr, 1852 H_DEREG_BCMC); 1853 if (hret) { 1854 pr_err("failed deregistering mcast MAC\n"); 1855 ret = -EIO; 1856 } 1857 1858 list_del(pos); 1859 kfree(mc_entry); 1860 } 1861 return ret; 1862 } 1863 1864 static void ehea_allmulti(struct net_device *dev, int enable) 1865 { 1866 struct ehea_port *port = netdev_priv(dev); 1867 u64 hret; 1868 1869 if (!port->allmulti) { 1870 if (enable) { 1871 /* Enable ALLMULTI */ 1872 ehea_drop_multicast_list(dev); 1873 hret = ehea_multicast_reg_helper(port, 0, H_REG_BCMC); 1874 if (!hret) 1875 port->allmulti = 1; 1876 else 1877 netdev_err(dev, 1878 "failed enabling IFF_ALLMULTI\n"); 1879 } 1880 } else { 1881 if (!enable) { 1882 /* Disable ALLMULTI */ 1883 hret = ehea_multicast_reg_helper(port, 0, H_DEREG_BCMC); 1884 if (!hret) 1885 port->allmulti = 0; 1886 else 1887 netdev_err(dev, 1888 "failed disabling IFF_ALLMULTI\n"); 1889 } 1890 } 1891 } 1892 1893 static void ehea_add_multicast_entry(struct ehea_port *port, u8 *mc_mac_addr) 1894 { 1895 struct ehea_mc_list *ehea_mcl_entry; 1896 u64 hret; 1897 1898 ehea_mcl_entry = kzalloc(sizeof(*ehea_mcl_entry), GFP_ATOMIC); 1899 if (!ehea_mcl_entry) 1900 return; 1901 1902 INIT_LIST_HEAD(&ehea_mcl_entry->list); 1903 1904 memcpy(&ehea_mcl_entry->macaddr, mc_mac_addr, ETH_ALEN); 1905 1906 hret = ehea_multicast_reg_helper(port, ehea_mcl_entry->macaddr, 1907 H_REG_BCMC); 1908 if (!hret) 1909 list_add(&ehea_mcl_entry->list, &port->mc_list->list); 1910 else { 1911 pr_err("failed registering mcast MAC\n"); 1912 kfree(ehea_mcl_entry); 1913 } 1914 } 1915 1916 static void ehea_set_multicast_list(struct net_device *dev) 1917 { 1918 struct ehea_port *port = netdev_priv(dev); 1919 struct netdev_hw_addr *ha; 1920 int ret; 1921 1922 ehea_promiscuous(dev, !!(dev->flags & IFF_PROMISC)); 1923 1924 if (dev->flags & IFF_ALLMULTI) { 1925 ehea_allmulti(dev, 1); 1926 goto out; 1927 } 1928 ehea_allmulti(dev, 0); 1929 1930 if (!netdev_mc_empty(dev)) { 1931 ret = ehea_drop_multicast_list(dev); 1932 if (ret) { 1933 /* Dropping the current multicast list failed. 1934 * Enabling ALL_MULTI is the best we can do. 1935 */ 1936 ehea_allmulti(dev, 1); 1937 } 1938 1939 if (netdev_mc_count(dev) > port->adapter->max_mc_mac) { 1940 pr_info("Mcast registration limit reached (0x%llx). Use ALLMULTI!\n", 1941 port->adapter->max_mc_mac); 1942 goto out; 1943 } 1944 1945 netdev_for_each_mc_addr(ha, dev) 1946 ehea_add_multicast_entry(port, ha->addr); 1947 1948 } 1949 out: 1950 ehea_update_bcmc_registrations(); 1951 } 1952 1953 static void xmit_common(struct sk_buff *skb, struct ehea_swqe *swqe) 1954 { 1955 swqe->tx_control |= EHEA_SWQE_IMM_DATA_PRESENT | EHEA_SWQE_CRC; 1956 1957 if (vlan_get_protocol(skb) != htons(ETH_P_IP)) 1958 return; 1959 1960 if (skb->ip_summed == CHECKSUM_PARTIAL) 1961 swqe->tx_control |= EHEA_SWQE_IP_CHECKSUM; 1962 1963 swqe->ip_start = skb_network_offset(skb); 1964 swqe->ip_end = swqe->ip_start + ip_hdrlen(skb) - 1; 1965 1966 switch (ip_hdr(skb)->protocol) { 1967 case IPPROTO_UDP: 1968 if (skb->ip_summed == CHECKSUM_PARTIAL) 1969 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1970 1971 swqe->tcp_offset = swqe->ip_end + 1 + 1972 offsetof(struct udphdr, check); 1973 break; 1974 1975 case IPPROTO_TCP: 1976 if (skb->ip_summed == CHECKSUM_PARTIAL) 1977 swqe->tx_control |= EHEA_SWQE_TCP_CHECKSUM; 1978 1979 swqe->tcp_offset = swqe->ip_end + 1 + 1980 offsetof(struct tcphdr, check); 1981 break; 1982 } 1983 } 1984 1985 static void ehea_xmit2(struct sk_buff *skb, struct net_device *dev, 1986 struct ehea_swqe *swqe, u32 lkey) 1987 { 1988 swqe->tx_control |= EHEA_SWQE_DESCRIPTORS_PRESENT; 1989 1990 xmit_common(skb, swqe); 1991 1992 write_swqe2_data(skb, dev, swqe, lkey); 1993 } 1994 1995 static void ehea_xmit3(struct sk_buff *skb, struct net_device *dev, 1996 struct ehea_swqe *swqe) 1997 { 1998 u8 *imm_data = &swqe->u.immdata_nodesc.immediate_data[0]; 1999 2000 xmit_common(skb, swqe); 2001 2002 if (!skb->data_len) 2003 skb_copy_from_linear_data(skb, imm_data, skb->len); 2004 else 2005 skb_copy_bits(skb, 0, imm_data, skb->len); 2006 2007 swqe->immediate_data_length = skb->len; 2008 dev_consume_skb_any(skb); 2009 } 2010 2011 static netdev_tx_t ehea_start_xmit(struct sk_buff *skb, struct net_device *dev) 2012 { 2013 struct ehea_port *port = netdev_priv(dev); 2014 struct ehea_swqe *swqe; 2015 u32 lkey; 2016 int swqe_index; 2017 struct ehea_port_res *pr; 2018 struct netdev_queue *txq; 2019 2020 pr = &port->port_res[skb_get_queue_mapping(skb)]; 2021 txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb)); 2022 2023 swqe = ehea_get_swqe(pr->qp, &swqe_index); 2024 memset(swqe, 0, SWQE_HEADER_SIZE); 2025 atomic_dec(&pr->swqe_avail); 2026 2027 if (skb_vlan_tag_present(skb)) { 2028 swqe->tx_control |= EHEA_SWQE_VLAN_INSERT; 2029 swqe->vlan_tag = skb_vlan_tag_get(skb); 2030 } 2031 2032 pr->tx_packets++; 2033 pr->tx_bytes += skb->len; 2034 2035 if (skb->len <= SWQE3_MAX_IMM) { 2036 u32 sig_iv = port->sig_comp_iv; 2037 u32 swqe_num = pr->swqe_id_counter; 2038 ehea_xmit3(skb, dev, swqe); 2039 swqe->wr_id = EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE3_TYPE) 2040 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, swqe_num); 2041 if (pr->swqe_ll_count >= (sig_iv - 1)) { 2042 swqe->wr_id |= EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 2043 sig_iv); 2044 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2045 pr->swqe_ll_count = 0; 2046 } else 2047 pr->swqe_ll_count += 1; 2048 } else { 2049 swqe->wr_id = 2050 EHEA_BMASK_SET(EHEA_WR_ID_TYPE, EHEA_SWQE2_TYPE) 2051 | EHEA_BMASK_SET(EHEA_WR_ID_COUNT, pr->swqe_id_counter) 2052 | EHEA_BMASK_SET(EHEA_WR_ID_REFILL, 1) 2053 | EHEA_BMASK_SET(EHEA_WR_ID_INDEX, pr->sq_skba.index); 2054 pr->sq_skba.arr[pr->sq_skba.index] = skb; 2055 2056 pr->sq_skba.index++; 2057 pr->sq_skba.index &= (pr->sq_skba.len - 1); 2058 2059 lkey = pr->send_mr.lkey; 2060 ehea_xmit2(skb, dev, swqe, lkey); 2061 swqe->tx_control |= EHEA_SWQE_SIGNALLED_COMPLETION; 2062 } 2063 pr->swqe_id_counter += 1; 2064 2065 netif_info(port, tx_queued, dev, 2066 "post swqe on QP %d\n", pr->qp->init_attr.qp_nr); 2067 if (netif_msg_tx_queued(port)) 2068 ehea_dump(swqe, 512, "swqe"); 2069 2070 if (unlikely(test_bit(__EHEA_STOP_XFER, &ehea_driver_flags))) { 2071 netif_tx_stop_queue(txq); 2072 swqe->tx_control |= EHEA_SWQE_PURGE; 2073 } 2074 2075 ehea_post_swqe(pr->qp, swqe); 2076 2077 if (unlikely(atomic_read(&pr->swqe_avail) <= 1)) { 2078 pr->p_stats.queue_stopped++; 2079 netif_tx_stop_queue(txq); 2080 } 2081 2082 return NETDEV_TX_OK; 2083 } 2084 2085 static int ehea_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) 2086 { 2087 struct ehea_port *port = netdev_priv(dev); 2088 struct ehea_adapter *adapter = port->adapter; 2089 struct hcp_ehea_port_cb1 *cb1; 2090 int index; 2091 u64 hret; 2092 int err = 0; 2093 2094 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2095 if (!cb1) { 2096 pr_err("no mem for cb1\n"); 2097 err = -ENOMEM; 2098 goto out; 2099 } 2100 2101 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2102 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2103 if (hret != H_SUCCESS) { 2104 pr_err("query_ehea_port failed\n"); 2105 err = -EINVAL; 2106 goto out; 2107 } 2108 2109 index = (vid / 64); 2110 cb1->vlan_filter[index] |= ((u64)(0x8000000000000000 >> (vid & 0x3F))); 2111 2112 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2113 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2114 if (hret != H_SUCCESS) { 2115 pr_err("modify_ehea_port failed\n"); 2116 err = -EINVAL; 2117 } 2118 out: 2119 free_page((unsigned long)cb1); 2120 return err; 2121 } 2122 2123 static int ehea_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) 2124 { 2125 struct ehea_port *port = netdev_priv(dev); 2126 struct ehea_adapter *adapter = port->adapter; 2127 struct hcp_ehea_port_cb1 *cb1; 2128 int index; 2129 u64 hret; 2130 int err = 0; 2131 2132 cb1 = (void *)get_zeroed_page(GFP_KERNEL); 2133 if (!cb1) { 2134 pr_err("no mem for cb1\n"); 2135 err = -ENOMEM; 2136 goto out; 2137 } 2138 2139 hret = ehea_h_query_ehea_port(adapter->handle, port->logical_port_id, 2140 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2141 if (hret != H_SUCCESS) { 2142 pr_err("query_ehea_port failed\n"); 2143 err = -EINVAL; 2144 goto out; 2145 } 2146 2147 index = (vid / 64); 2148 cb1->vlan_filter[index] &= ~((u64)(0x8000000000000000 >> (vid & 0x3F))); 2149 2150 hret = ehea_h_modify_ehea_port(adapter->handle, port->logical_port_id, 2151 H_PORT_CB1, H_PORT_CB1_ALL, cb1); 2152 if (hret != H_SUCCESS) { 2153 pr_err("modify_ehea_port failed\n"); 2154 err = -EINVAL; 2155 } 2156 out: 2157 free_page((unsigned long)cb1); 2158 return err; 2159 } 2160 2161 static int ehea_activate_qp(struct ehea_adapter *adapter, struct ehea_qp *qp) 2162 { 2163 int ret = -EIO; 2164 u64 hret; 2165 u16 dummy16 = 0; 2166 u64 dummy64 = 0; 2167 struct hcp_modify_qp_cb0 *cb0; 2168 2169 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2170 if (!cb0) { 2171 ret = -ENOMEM; 2172 goto out; 2173 } 2174 2175 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2176 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2177 if (hret != H_SUCCESS) { 2178 pr_err("query_ehea_qp failed (1)\n"); 2179 goto out; 2180 } 2181 2182 cb0->qp_ctl_reg = H_QP_CR_STATE_INITIALIZED; 2183 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2184 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2185 &dummy64, &dummy64, &dummy16, &dummy16); 2186 if (hret != H_SUCCESS) { 2187 pr_err("modify_ehea_qp failed (1)\n"); 2188 goto out; 2189 } 2190 2191 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2192 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2193 if (hret != H_SUCCESS) { 2194 pr_err("query_ehea_qp failed (2)\n"); 2195 goto out; 2196 } 2197 2198 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_INITIALIZED; 2199 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2200 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2201 &dummy64, &dummy64, &dummy16, &dummy16); 2202 if (hret != H_SUCCESS) { 2203 pr_err("modify_ehea_qp failed (2)\n"); 2204 goto out; 2205 } 2206 2207 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2208 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2209 if (hret != H_SUCCESS) { 2210 pr_err("query_ehea_qp failed (3)\n"); 2211 goto out; 2212 } 2213 2214 cb0->qp_ctl_reg = H_QP_CR_ENABLED | H_QP_CR_STATE_RDY2SND; 2215 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2216 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 1), cb0, 2217 &dummy64, &dummy64, &dummy16, &dummy16); 2218 if (hret != H_SUCCESS) { 2219 pr_err("modify_ehea_qp failed (3)\n"); 2220 goto out; 2221 } 2222 2223 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2224 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), cb0); 2225 if (hret != H_SUCCESS) { 2226 pr_err("query_ehea_qp failed (4)\n"); 2227 goto out; 2228 } 2229 2230 ret = 0; 2231 out: 2232 free_page((unsigned long)cb0); 2233 return ret; 2234 } 2235 2236 static int ehea_port_res_setup(struct ehea_port *port, int def_qps) 2237 { 2238 int ret, i; 2239 struct port_res_cfg pr_cfg, pr_cfg_small_rx; 2240 enum ehea_eq_type eq_type = EHEA_EQ; 2241 2242 port->qp_eq = ehea_create_eq(port->adapter, eq_type, 2243 EHEA_MAX_ENTRIES_EQ, 1); 2244 if (!port->qp_eq) { 2245 ret = -EINVAL; 2246 pr_err("ehea_create_eq failed (qp_eq)\n"); 2247 goto out_kill_eq; 2248 } 2249 2250 pr_cfg.max_entries_rcq = rq1_entries + rq2_entries + rq3_entries; 2251 pr_cfg.max_entries_scq = sq_entries * 2; 2252 pr_cfg.max_entries_sq = sq_entries; 2253 pr_cfg.max_entries_rq1 = rq1_entries; 2254 pr_cfg.max_entries_rq2 = rq2_entries; 2255 pr_cfg.max_entries_rq3 = rq3_entries; 2256 2257 pr_cfg_small_rx.max_entries_rcq = 1; 2258 pr_cfg_small_rx.max_entries_scq = sq_entries; 2259 pr_cfg_small_rx.max_entries_sq = sq_entries; 2260 pr_cfg_small_rx.max_entries_rq1 = 1; 2261 pr_cfg_small_rx.max_entries_rq2 = 1; 2262 pr_cfg_small_rx.max_entries_rq3 = 1; 2263 2264 for (i = 0; i < def_qps; i++) { 2265 ret = ehea_init_port_res(port, &port->port_res[i], &pr_cfg, i); 2266 if (ret) 2267 goto out_clean_pr; 2268 } 2269 for (i = def_qps; i < def_qps; i++) { 2270 ret = ehea_init_port_res(port, &port->port_res[i], 2271 &pr_cfg_small_rx, i); 2272 if (ret) 2273 goto out_clean_pr; 2274 } 2275 2276 return 0; 2277 2278 out_clean_pr: 2279 while (--i >= 0) 2280 ehea_clean_portres(port, &port->port_res[i]); 2281 2282 out_kill_eq: 2283 ehea_destroy_eq(port->qp_eq); 2284 return ret; 2285 } 2286 2287 static int ehea_clean_all_portres(struct ehea_port *port) 2288 { 2289 int ret = 0; 2290 int i; 2291 2292 for (i = 0; i < port->num_def_qps; i++) 2293 ret |= ehea_clean_portres(port, &port->port_res[i]); 2294 2295 ret |= ehea_destroy_eq(port->qp_eq); 2296 2297 return ret; 2298 } 2299 2300 static void ehea_remove_adapter_mr(struct ehea_adapter *adapter) 2301 { 2302 if (adapter->active_ports) 2303 return; 2304 2305 ehea_rem_mr(&adapter->mr); 2306 } 2307 2308 static int ehea_add_adapter_mr(struct ehea_adapter *adapter) 2309 { 2310 if (adapter->active_ports) 2311 return 0; 2312 2313 return ehea_reg_kernel_mr(adapter, &adapter->mr); 2314 } 2315 2316 static int ehea_up(struct net_device *dev) 2317 { 2318 int ret, i; 2319 struct ehea_port *port = netdev_priv(dev); 2320 2321 if (port->state == EHEA_PORT_UP) 2322 return 0; 2323 2324 ret = ehea_port_res_setup(port, port->num_def_qps); 2325 if (ret) { 2326 netdev_err(dev, "port_res_failed\n"); 2327 goto out; 2328 } 2329 2330 /* Set default QP for this port */ 2331 ret = ehea_configure_port(port); 2332 if (ret) { 2333 netdev_err(dev, "ehea_configure_port failed. ret:%d\n", ret); 2334 goto out_clean_pr; 2335 } 2336 2337 ret = ehea_reg_interrupts(dev); 2338 if (ret) { 2339 netdev_err(dev, "reg_interrupts failed. ret:%d\n", ret); 2340 goto out_clean_pr; 2341 } 2342 2343 for (i = 0; i < port->num_def_qps; i++) { 2344 ret = ehea_activate_qp(port->adapter, port->port_res[i].qp); 2345 if (ret) { 2346 netdev_err(dev, "activate_qp failed\n"); 2347 goto out_free_irqs; 2348 } 2349 } 2350 2351 for (i = 0; i < port->num_def_qps; i++) { 2352 ret = ehea_fill_port_res(&port->port_res[i]); 2353 if (ret) { 2354 netdev_err(dev, "out_free_irqs\n"); 2355 goto out_free_irqs; 2356 } 2357 } 2358 2359 ret = ehea_broadcast_reg_helper(port, H_REG_BCMC); 2360 if (ret) { 2361 ret = -EIO; 2362 goto out_free_irqs; 2363 } 2364 2365 port->state = EHEA_PORT_UP; 2366 2367 ret = 0; 2368 goto out; 2369 2370 out_free_irqs: 2371 ehea_free_interrupts(dev); 2372 2373 out_clean_pr: 2374 ehea_clean_all_portres(port); 2375 out: 2376 if (ret) 2377 netdev_info(dev, "Failed starting. ret=%i\n", ret); 2378 2379 ehea_update_bcmc_registrations(); 2380 ehea_update_firmware_handles(); 2381 2382 return ret; 2383 } 2384 2385 static void port_napi_disable(struct ehea_port *port) 2386 { 2387 int i; 2388 2389 for (i = 0; i < port->num_def_qps; i++) 2390 napi_disable(&port->port_res[i].napi); 2391 } 2392 2393 static void port_napi_enable(struct ehea_port *port) 2394 { 2395 int i; 2396 2397 for (i = 0; i < port->num_def_qps; i++) 2398 napi_enable(&port->port_res[i].napi); 2399 } 2400 2401 static int ehea_open(struct net_device *dev) 2402 { 2403 int ret; 2404 struct ehea_port *port = netdev_priv(dev); 2405 2406 mutex_lock(&port->port_lock); 2407 2408 netif_info(port, ifup, dev, "enabling port\n"); 2409 2410 netif_carrier_off(dev); 2411 2412 ret = ehea_up(dev); 2413 if (!ret) { 2414 port_napi_enable(port); 2415 netif_tx_start_all_queues(dev); 2416 } 2417 2418 mutex_unlock(&port->port_lock); 2419 schedule_delayed_work(&port->stats_work, 2420 round_jiffies_relative(msecs_to_jiffies(1000))); 2421 2422 return ret; 2423 } 2424 2425 static int ehea_down(struct net_device *dev) 2426 { 2427 int ret; 2428 struct ehea_port *port = netdev_priv(dev); 2429 2430 if (port->state == EHEA_PORT_DOWN) 2431 return 0; 2432 2433 ehea_drop_multicast_list(dev); 2434 ehea_allmulti(dev, 0); 2435 ehea_broadcast_reg_helper(port, H_DEREG_BCMC); 2436 2437 ehea_free_interrupts(dev); 2438 2439 port->state = EHEA_PORT_DOWN; 2440 2441 ehea_update_bcmc_registrations(); 2442 2443 ret = ehea_clean_all_portres(port); 2444 if (ret) 2445 netdev_info(dev, "Failed freeing resources. ret=%i\n", ret); 2446 2447 ehea_update_firmware_handles(); 2448 2449 return ret; 2450 } 2451 2452 static int ehea_stop(struct net_device *dev) 2453 { 2454 int ret; 2455 struct ehea_port *port = netdev_priv(dev); 2456 2457 netif_info(port, ifdown, dev, "disabling port\n"); 2458 2459 set_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2460 cancel_work_sync(&port->reset_task); 2461 cancel_delayed_work_sync(&port->stats_work); 2462 mutex_lock(&port->port_lock); 2463 netif_tx_stop_all_queues(dev); 2464 port_napi_disable(port); 2465 ret = ehea_down(dev); 2466 mutex_unlock(&port->port_lock); 2467 clear_bit(__EHEA_DISABLE_PORT_RESET, &port->flags); 2468 return ret; 2469 } 2470 2471 static void ehea_purge_sq(struct ehea_qp *orig_qp) 2472 { 2473 struct ehea_qp qp = *orig_qp; 2474 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2475 struct ehea_swqe *swqe; 2476 int wqe_index; 2477 int i; 2478 2479 for (i = 0; i < init_attr->act_nr_send_wqes; i++) { 2480 swqe = ehea_get_swqe(&qp, &wqe_index); 2481 swqe->tx_control |= EHEA_SWQE_PURGE; 2482 } 2483 } 2484 2485 static void ehea_flush_sq(struct ehea_port *port) 2486 { 2487 int i; 2488 2489 for (i = 0; i < port->num_def_qps; i++) { 2490 struct ehea_port_res *pr = &port->port_res[i]; 2491 int swqe_max = pr->sq_skba_size - 2 - pr->swqe_ll_count; 2492 int ret; 2493 2494 ret = wait_event_timeout(port->swqe_avail_wq, 2495 atomic_read(&pr->swqe_avail) >= swqe_max, 2496 msecs_to_jiffies(100)); 2497 2498 if (!ret) { 2499 pr_err("WARNING: sq not flushed completely\n"); 2500 break; 2501 } 2502 } 2503 } 2504 2505 static int ehea_stop_qps(struct net_device *dev) 2506 { 2507 struct ehea_port *port = netdev_priv(dev); 2508 struct ehea_adapter *adapter = port->adapter; 2509 struct hcp_modify_qp_cb0 *cb0; 2510 int ret = -EIO; 2511 int dret; 2512 int i; 2513 u64 hret; 2514 u64 dummy64 = 0; 2515 u16 dummy16 = 0; 2516 2517 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2518 if (!cb0) { 2519 ret = -ENOMEM; 2520 goto out; 2521 } 2522 2523 for (i = 0; i < (port->num_def_qps); i++) { 2524 struct ehea_port_res *pr = &port->port_res[i]; 2525 struct ehea_qp *qp = pr->qp; 2526 2527 /* Purge send queue */ 2528 ehea_purge_sq(qp); 2529 2530 /* Disable queue pair */ 2531 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2532 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2533 cb0); 2534 if (hret != H_SUCCESS) { 2535 pr_err("query_ehea_qp failed (1)\n"); 2536 goto out; 2537 } 2538 2539 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2540 cb0->qp_ctl_reg &= ~H_QP_CR_ENABLED; 2541 2542 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2543 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2544 1), cb0, &dummy64, 2545 &dummy64, &dummy16, &dummy16); 2546 if (hret != H_SUCCESS) { 2547 pr_err("modify_ehea_qp failed (1)\n"); 2548 goto out; 2549 } 2550 2551 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2552 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2553 cb0); 2554 if (hret != H_SUCCESS) { 2555 pr_err("query_ehea_qp failed (2)\n"); 2556 goto out; 2557 } 2558 2559 /* deregister shared memory regions */ 2560 dret = ehea_rem_smrs(pr); 2561 if (dret) { 2562 pr_err("unreg shared memory region failed\n"); 2563 goto out; 2564 } 2565 } 2566 2567 ret = 0; 2568 out: 2569 free_page((unsigned long)cb0); 2570 2571 return ret; 2572 } 2573 2574 static void ehea_update_rqs(struct ehea_qp *orig_qp, struct ehea_port_res *pr) 2575 { 2576 struct ehea_qp qp = *orig_qp; 2577 struct ehea_qp_init_attr *init_attr = &qp.init_attr; 2578 struct ehea_rwqe *rwqe; 2579 struct sk_buff **skba_rq2 = pr->rq2_skba.arr; 2580 struct sk_buff **skba_rq3 = pr->rq3_skba.arr; 2581 struct sk_buff *skb; 2582 u32 lkey = pr->recv_mr.lkey; 2583 2584 2585 int i; 2586 int index; 2587 2588 for (i = 0; i < init_attr->act_nr_rwqes_rq2 + 1; i++) { 2589 rwqe = ehea_get_next_rwqe(&qp, 2); 2590 rwqe->sg_list[0].l_key = lkey; 2591 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2592 skb = skba_rq2[index]; 2593 if (skb) 2594 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2595 } 2596 2597 for (i = 0; i < init_attr->act_nr_rwqes_rq3 + 1; i++) { 2598 rwqe = ehea_get_next_rwqe(&qp, 3); 2599 rwqe->sg_list[0].l_key = lkey; 2600 index = EHEA_BMASK_GET(EHEA_WR_ID_INDEX, rwqe->wr_id); 2601 skb = skba_rq3[index]; 2602 if (skb) 2603 rwqe->sg_list[0].vaddr = ehea_map_vaddr(skb->data); 2604 } 2605 } 2606 2607 static int ehea_restart_qps(struct net_device *dev) 2608 { 2609 struct ehea_port *port = netdev_priv(dev); 2610 struct ehea_adapter *adapter = port->adapter; 2611 int ret = 0; 2612 int i; 2613 2614 struct hcp_modify_qp_cb0 *cb0; 2615 u64 hret; 2616 u64 dummy64 = 0; 2617 u16 dummy16 = 0; 2618 2619 cb0 = (void *)get_zeroed_page(GFP_KERNEL); 2620 if (!cb0) { 2621 ret = -ENOMEM; 2622 goto out; 2623 } 2624 2625 for (i = 0; i < (port->num_def_qps); i++) { 2626 struct ehea_port_res *pr = &port->port_res[i]; 2627 struct ehea_qp *qp = pr->qp; 2628 2629 ret = ehea_gen_smrs(pr); 2630 if (ret) { 2631 netdev_err(dev, "creation of shared memory regions failed\n"); 2632 goto out; 2633 } 2634 2635 ehea_update_rqs(qp, pr); 2636 2637 /* Enable queue pair */ 2638 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2639 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2640 cb0); 2641 if (hret != H_SUCCESS) { 2642 netdev_err(dev, "query_ehea_qp failed (1)\n"); 2643 goto out; 2644 } 2645 2646 cb0->qp_ctl_reg = (cb0->qp_ctl_reg & H_QP_CR_RES_STATE) << 8; 2647 cb0->qp_ctl_reg |= H_QP_CR_ENABLED; 2648 2649 hret = ehea_h_modify_ehea_qp(adapter->handle, 0, qp->fw_handle, 2650 EHEA_BMASK_SET(H_QPCB0_QP_CTL_REG, 2651 1), cb0, &dummy64, 2652 &dummy64, &dummy16, &dummy16); 2653 if (hret != H_SUCCESS) { 2654 netdev_err(dev, "modify_ehea_qp failed (1)\n"); 2655 goto out; 2656 } 2657 2658 hret = ehea_h_query_ehea_qp(adapter->handle, 0, qp->fw_handle, 2659 EHEA_BMASK_SET(H_QPCB0_ALL, 0xFFFF), 2660 cb0); 2661 if (hret != H_SUCCESS) { 2662 netdev_err(dev, "query_ehea_qp failed (2)\n"); 2663 goto out; 2664 } 2665 2666 /* refill entire queue */ 2667 ehea_refill_rq1(pr, pr->rq1_skba.index, 0); 2668 ehea_refill_rq2(pr, 0); 2669 ehea_refill_rq3(pr, 0); 2670 } 2671 out: 2672 free_page((unsigned long)cb0); 2673 2674 return ret; 2675 } 2676 2677 static void ehea_reset_port(struct work_struct *work) 2678 { 2679 int ret; 2680 struct ehea_port *port = 2681 container_of(work, struct ehea_port, reset_task); 2682 struct net_device *dev = port->netdev; 2683 2684 mutex_lock(&dlpar_mem_lock); 2685 port->resets++; 2686 mutex_lock(&port->port_lock); 2687 netif_tx_disable(dev); 2688 2689 port_napi_disable(port); 2690 2691 ehea_down(dev); 2692 2693 ret = ehea_up(dev); 2694 if (ret) 2695 goto out; 2696 2697 ehea_set_multicast_list(dev); 2698 2699 netif_info(port, timer, dev, "reset successful\n"); 2700 2701 port_napi_enable(port); 2702 2703 netif_tx_wake_all_queues(dev); 2704 out: 2705 mutex_unlock(&port->port_lock); 2706 mutex_unlock(&dlpar_mem_lock); 2707 } 2708 2709 static void ehea_rereg_mrs(void) 2710 { 2711 int ret, i; 2712 struct ehea_adapter *adapter; 2713 2714 pr_info("LPAR memory changed - re-initializing driver\n"); 2715 2716 list_for_each_entry(adapter, &adapter_list, list) 2717 if (adapter->active_ports) { 2718 /* Shutdown all ports */ 2719 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2720 struct ehea_port *port = adapter->port[i]; 2721 struct net_device *dev; 2722 2723 if (!port) 2724 continue; 2725 2726 dev = port->netdev; 2727 2728 if (dev->flags & IFF_UP) { 2729 mutex_lock(&port->port_lock); 2730 netif_tx_disable(dev); 2731 ehea_flush_sq(port); 2732 ret = ehea_stop_qps(dev); 2733 if (ret) { 2734 mutex_unlock(&port->port_lock); 2735 goto out; 2736 } 2737 port_napi_disable(port); 2738 mutex_unlock(&port->port_lock); 2739 } 2740 reset_sq_restart_flag(port); 2741 } 2742 2743 /* Unregister old memory region */ 2744 ret = ehea_rem_mr(&adapter->mr); 2745 if (ret) { 2746 pr_err("unregister MR failed - driver inoperable!\n"); 2747 goto out; 2748 } 2749 } 2750 2751 clear_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 2752 2753 list_for_each_entry(adapter, &adapter_list, list) 2754 if (adapter->active_ports) { 2755 /* Register new memory region */ 2756 ret = ehea_reg_kernel_mr(adapter, &adapter->mr); 2757 if (ret) { 2758 pr_err("register MR failed - driver inoperable!\n"); 2759 goto out; 2760 } 2761 2762 /* Restart all ports */ 2763 for (i = 0; i < EHEA_MAX_PORTS; i++) { 2764 struct ehea_port *port = adapter->port[i]; 2765 2766 if (port) { 2767 struct net_device *dev = port->netdev; 2768 2769 if (dev->flags & IFF_UP) { 2770 mutex_lock(&port->port_lock); 2771 ret = ehea_restart_qps(dev); 2772 if (!ret) { 2773 check_sqs(port); 2774 port_napi_enable(port); 2775 netif_tx_wake_all_queues(dev); 2776 } else { 2777 netdev_err(dev, "Unable to restart QPS\n"); 2778 } 2779 mutex_unlock(&port->port_lock); 2780 } 2781 } 2782 } 2783 } 2784 pr_info("re-initializing driver complete\n"); 2785 out: 2786 return; 2787 } 2788 2789 static void ehea_tx_watchdog(struct net_device *dev, unsigned int txqueue) 2790 { 2791 struct ehea_port *port = netdev_priv(dev); 2792 2793 if (netif_carrier_ok(dev) && 2794 !test_bit(__EHEA_STOP_XFER, &ehea_driver_flags)) 2795 ehea_schedule_port_reset(port); 2796 } 2797 2798 static int ehea_sense_adapter_attr(struct ehea_adapter *adapter) 2799 { 2800 struct hcp_query_ehea *cb; 2801 u64 hret; 2802 int ret; 2803 2804 cb = (void *)get_zeroed_page(GFP_KERNEL); 2805 if (!cb) { 2806 ret = -ENOMEM; 2807 goto out; 2808 } 2809 2810 hret = ehea_h_query_ehea(adapter->handle, cb); 2811 2812 if (hret != H_SUCCESS) { 2813 ret = -EIO; 2814 goto out_herr; 2815 } 2816 2817 adapter->max_mc_mac = cb->max_mc_mac - 1; 2818 ret = 0; 2819 2820 out_herr: 2821 free_page((unsigned long)cb); 2822 out: 2823 return ret; 2824 } 2825 2826 static int ehea_get_jumboframe_status(struct ehea_port *port, int *jumbo) 2827 { 2828 struct hcp_ehea_port_cb4 *cb4; 2829 u64 hret; 2830 int ret = 0; 2831 2832 *jumbo = 0; 2833 2834 /* (Try to) enable *jumbo frames */ 2835 cb4 = (void *)get_zeroed_page(GFP_KERNEL); 2836 if (!cb4) { 2837 pr_err("no mem for cb4\n"); 2838 ret = -ENOMEM; 2839 goto out; 2840 } else { 2841 hret = ehea_h_query_ehea_port(port->adapter->handle, 2842 port->logical_port_id, 2843 H_PORT_CB4, 2844 H_PORT_CB4_JUMBO, cb4); 2845 if (hret == H_SUCCESS) { 2846 if (cb4->jumbo_frame) 2847 *jumbo = 1; 2848 else { 2849 cb4->jumbo_frame = 1; 2850 hret = ehea_h_modify_ehea_port(port->adapter-> 2851 handle, 2852 port-> 2853 logical_port_id, 2854 H_PORT_CB4, 2855 H_PORT_CB4_JUMBO, 2856 cb4); 2857 if (hret == H_SUCCESS) 2858 *jumbo = 1; 2859 } 2860 } else 2861 ret = -EINVAL; 2862 2863 free_page((unsigned long)cb4); 2864 } 2865 out: 2866 return ret; 2867 } 2868 2869 static ssize_t ehea_show_port_id(struct device *dev, 2870 struct device_attribute *attr, char *buf) 2871 { 2872 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2873 return sprintf(buf, "%d", port->logical_port_id); 2874 } 2875 2876 static DEVICE_ATTR(log_port_id, 0444, ehea_show_port_id, NULL); 2877 2878 static void logical_port_release(struct device *dev) 2879 { 2880 struct ehea_port *port = container_of(dev, struct ehea_port, ofdev.dev); 2881 of_node_put(port->ofdev.dev.of_node); 2882 } 2883 2884 static struct device *ehea_register_port(struct ehea_port *port, 2885 struct device_node *dn) 2886 { 2887 int ret; 2888 2889 port->ofdev.dev.of_node = of_node_get(dn); 2890 port->ofdev.dev.parent = &port->adapter->ofdev->dev; 2891 port->ofdev.dev.bus = &ibmebus_bus_type; 2892 2893 dev_set_name(&port->ofdev.dev, "port%d", port_name_cnt++); 2894 port->ofdev.dev.release = logical_port_release; 2895 2896 ret = of_device_register(&port->ofdev); 2897 if (ret) { 2898 pr_err("failed to register device. ret=%d\n", ret); 2899 goto out; 2900 } 2901 2902 ret = device_create_file(&port->ofdev.dev, &dev_attr_log_port_id); 2903 if (ret) { 2904 pr_err("failed to register attributes, ret=%d\n", ret); 2905 goto out_unreg_of_dev; 2906 } 2907 2908 return &port->ofdev.dev; 2909 2910 out_unreg_of_dev: 2911 of_device_unregister(&port->ofdev); 2912 out: 2913 return NULL; 2914 } 2915 2916 static void ehea_unregister_port(struct ehea_port *port) 2917 { 2918 device_remove_file(&port->ofdev.dev, &dev_attr_log_port_id); 2919 of_device_unregister(&port->ofdev); 2920 } 2921 2922 static const struct net_device_ops ehea_netdev_ops = { 2923 .ndo_open = ehea_open, 2924 .ndo_stop = ehea_stop, 2925 .ndo_start_xmit = ehea_start_xmit, 2926 .ndo_get_stats64 = ehea_get_stats64, 2927 .ndo_set_mac_address = ehea_set_mac_addr, 2928 .ndo_validate_addr = eth_validate_addr, 2929 .ndo_set_rx_mode = ehea_set_multicast_list, 2930 .ndo_vlan_rx_add_vid = ehea_vlan_rx_add_vid, 2931 .ndo_vlan_rx_kill_vid = ehea_vlan_rx_kill_vid, 2932 .ndo_tx_timeout = ehea_tx_watchdog, 2933 }; 2934 2935 static struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter, 2936 u32 logical_port_id, 2937 struct device_node *dn) 2938 { 2939 int ret; 2940 struct net_device *dev; 2941 struct ehea_port *port; 2942 struct device *port_dev; 2943 int jumbo; 2944 2945 /* allocate memory for the port structures */ 2946 dev = alloc_etherdev_mq(sizeof(struct ehea_port), EHEA_MAX_PORT_RES); 2947 2948 if (!dev) { 2949 ret = -ENOMEM; 2950 goto out_err; 2951 } 2952 2953 port = netdev_priv(dev); 2954 2955 mutex_init(&port->port_lock); 2956 port->state = EHEA_PORT_DOWN; 2957 port->sig_comp_iv = sq_entries / 10; 2958 2959 port->adapter = adapter; 2960 port->netdev = dev; 2961 port->logical_port_id = logical_port_id; 2962 2963 port->msg_enable = netif_msg_init(msg_level, EHEA_MSG_DEFAULT); 2964 2965 port->mc_list = kzalloc(sizeof(struct ehea_mc_list), GFP_KERNEL); 2966 if (!port->mc_list) { 2967 ret = -ENOMEM; 2968 goto out_free_ethdev; 2969 } 2970 2971 INIT_LIST_HEAD(&port->mc_list->list); 2972 2973 ret = ehea_sense_port_attr(port); 2974 if (ret) 2975 goto out_free_mc_list; 2976 2977 netif_set_real_num_rx_queues(dev, port->num_def_qps); 2978 netif_set_real_num_tx_queues(dev, port->num_def_qps); 2979 2980 port_dev = ehea_register_port(port, dn); 2981 if (!port_dev) 2982 goto out_free_mc_list; 2983 2984 SET_NETDEV_DEV(dev, port_dev); 2985 2986 /* initialize net_device structure */ 2987 memcpy(dev->dev_addr, &port->mac_addr, ETH_ALEN); 2988 2989 dev->netdev_ops = &ehea_netdev_ops; 2990 ehea_set_ethtool_ops(dev); 2991 2992 dev->hw_features = NETIF_F_SG | NETIF_F_TSO | 2993 NETIF_F_IP_CSUM | NETIF_F_HW_VLAN_CTAG_TX; 2994 dev->features = NETIF_F_SG | NETIF_F_TSO | 2995 NETIF_F_HIGHDMA | NETIF_F_IP_CSUM | 2996 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | 2997 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_RXCSUM; 2998 dev->vlan_features = NETIF_F_SG | NETIF_F_TSO | NETIF_F_HIGHDMA | 2999 NETIF_F_IP_CSUM; 3000 dev->watchdog_timeo = EHEA_WATCH_DOG_TIMEOUT; 3001 3002 /* MTU range: 68 - 9022 */ 3003 dev->min_mtu = ETH_MIN_MTU; 3004 dev->max_mtu = EHEA_MAX_PACKET_SIZE; 3005 3006 INIT_WORK(&port->reset_task, ehea_reset_port); 3007 INIT_DELAYED_WORK(&port->stats_work, ehea_update_stats); 3008 3009 init_waitqueue_head(&port->swqe_avail_wq); 3010 init_waitqueue_head(&port->restart_wq); 3011 3012 ret = register_netdev(dev); 3013 if (ret) { 3014 pr_err("register_netdev failed. ret=%d\n", ret); 3015 goto out_unreg_port; 3016 } 3017 3018 ret = ehea_get_jumboframe_status(port, &jumbo); 3019 if (ret) 3020 netdev_err(dev, "failed determining jumbo frame status\n"); 3021 3022 netdev_info(dev, "Jumbo frames are %sabled\n", 3023 jumbo == 1 ? "en" : "dis"); 3024 3025 adapter->active_ports++; 3026 3027 return port; 3028 3029 out_unreg_port: 3030 ehea_unregister_port(port); 3031 3032 out_free_mc_list: 3033 kfree(port->mc_list); 3034 3035 out_free_ethdev: 3036 free_netdev(dev); 3037 3038 out_err: 3039 pr_err("setting up logical port with id=%d failed, ret=%d\n", 3040 logical_port_id, ret); 3041 return NULL; 3042 } 3043 3044 static void ehea_shutdown_single_port(struct ehea_port *port) 3045 { 3046 struct ehea_adapter *adapter = port->adapter; 3047 3048 cancel_work_sync(&port->reset_task); 3049 cancel_delayed_work_sync(&port->stats_work); 3050 unregister_netdev(port->netdev); 3051 ehea_unregister_port(port); 3052 kfree(port->mc_list); 3053 free_netdev(port->netdev); 3054 adapter->active_ports--; 3055 } 3056 3057 static int ehea_setup_ports(struct ehea_adapter *adapter) 3058 { 3059 struct device_node *lhea_dn; 3060 struct device_node *eth_dn = NULL; 3061 3062 const u32 *dn_log_port_id; 3063 int i = 0; 3064 3065 lhea_dn = adapter->ofdev->dev.of_node; 3066 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3067 3068 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3069 NULL); 3070 if (!dn_log_port_id) { 3071 pr_err("bad device node: eth_dn name=%pOF\n", eth_dn); 3072 continue; 3073 } 3074 3075 if (ehea_add_adapter_mr(adapter)) { 3076 pr_err("creating MR failed\n"); 3077 of_node_put(eth_dn); 3078 return -EIO; 3079 } 3080 3081 adapter->port[i] = ehea_setup_single_port(adapter, 3082 *dn_log_port_id, 3083 eth_dn); 3084 if (adapter->port[i]) 3085 netdev_info(adapter->port[i]->netdev, 3086 "logical port id #%d\n", *dn_log_port_id); 3087 else 3088 ehea_remove_adapter_mr(adapter); 3089 3090 i++; 3091 } 3092 return 0; 3093 } 3094 3095 static struct device_node *ehea_get_eth_dn(struct ehea_adapter *adapter, 3096 u32 logical_port_id) 3097 { 3098 struct device_node *lhea_dn; 3099 struct device_node *eth_dn = NULL; 3100 const u32 *dn_log_port_id; 3101 3102 lhea_dn = adapter->ofdev->dev.of_node; 3103 while ((eth_dn = of_get_next_child(lhea_dn, eth_dn))) { 3104 3105 dn_log_port_id = of_get_property(eth_dn, "ibm,hea-port-no", 3106 NULL); 3107 if (dn_log_port_id) 3108 if (*dn_log_port_id == logical_port_id) 3109 return eth_dn; 3110 } 3111 3112 return NULL; 3113 } 3114 3115 static ssize_t ehea_probe_port(struct device *dev, 3116 struct device_attribute *attr, 3117 const char *buf, size_t count) 3118 { 3119 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3120 struct ehea_port *port; 3121 struct device_node *eth_dn = NULL; 3122 int i; 3123 3124 u32 logical_port_id; 3125 3126 sscanf(buf, "%d", &logical_port_id); 3127 3128 port = ehea_get_port(adapter, logical_port_id); 3129 3130 if (port) { 3131 netdev_info(port->netdev, "adding port with logical port id=%d failed: port already configured\n", 3132 logical_port_id); 3133 return -EINVAL; 3134 } 3135 3136 eth_dn = ehea_get_eth_dn(adapter, logical_port_id); 3137 3138 if (!eth_dn) { 3139 pr_info("no logical port with id %d found\n", logical_port_id); 3140 return -EINVAL; 3141 } 3142 3143 if (ehea_add_adapter_mr(adapter)) { 3144 pr_err("creating MR failed\n"); 3145 of_node_put(eth_dn); 3146 return -EIO; 3147 } 3148 3149 port = ehea_setup_single_port(adapter, logical_port_id, eth_dn); 3150 3151 of_node_put(eth_dn); 3152 3153 if (port) { 3154 for (i = 0; i < EHEA_MAX_PORTS; i++) 3155 if (!adapter->port[i]) { 3156 adapter->port[i] = port; 3157 break; 3158 } 3159 3160 netdev_info(port->netdev, "added: (logical port id=%d)\n", 3161 logical_port_id); 3162 } else { 3163 ehea_remove_adapter_mr(adapter); 3164 return -EIO; 3165 } 3166 3167 return (ssize_t) count; 3168 } 3169 3170 static ssize_t ehea_remove_port(struct device *dev, 3171 struct device_attribute *attr, 3172 const char *buf, size_t count) 3173 { 3174 struct ehea_adapter *adapter = dev_get_drvdata(dev); 3175 struct ehea_port *port; 3176 int i; 3177 u32 logical_port_id; 3178 3179 sscanf(buf, "%d", &logical_port_id); 3180 3181 port = ehea_get_port(adapter, logical_port_id); 3182 3183 if (port) { 3184 netdev_info(port->netdev, "removed: (logical port id=%d)\n", 3185 logical_port_id); 3186 3187 ehea_shutdown_single_port(port); 3188 3189 for (i = 0; i < EHEA_MAX_PORTS; i++) 3190 if (adapter->port[i] == port) { 3191 adapter->port[i] = NULL; 3192 break; 3193 } 3194 } else { 3195 pr_err("removing port with logical port id=%d failed. port not configured.\n", 3196 logical_port_id); 3197 return -EINVAL; 3198 } 3199 3200 ehea_remove_adapter_mr(adapter); 3201 3202 return (ssize_t) count; 3203 } 3204 3205 static DEVICE_ATTR(probe_port, 0200, NULL, ehea_probe_port); 3206 static DEVICE_ATTR(remove_port, 0200, NULL, ehea_remove_port); 3207 3208 static int ehea_create_device_sysfs(struct platform_device *dev) 3209 { 3210 int ret = device_create_file(&dev->dev, &dev_attr_probe_port); 3211 if (ret) 3212 goto out; 3213 3214 ret = device_create_file(&dev->dev, &dev_attr_remove_port); 3215 out: 3216 return ret; 3217 } 3218 3219 static void ehea_remove_device_sysfs(struct platform_device *dev) 3220 { 3221 device_remove_file(&dev->dev, &dev_attr_probe_port); 3222 device_remove_file(&dev->dev, &dev_attr_remove_port); 3223 } 3224 3225 static int ehea_reboot_notifier(struct notifier_block *nb, 3226 unsigned long action, void *unused) 3227 { 3228 if (action == SYS_RESTART) { 3229 pr_info("Reboot: freeing all eHEA resources\n"); 3230 ibmebus_unregister_driver(&ehea_driver); 3231 } 3232 return NOTIFY_DONE; 3233 } 3234 3235 static struct notifier_block ehea_reboot_nb = { 3236 .notifier_call = ehea_reboot_notifier, 3237 }; 3238 3239 static int ehea_mem_notifier(struct notifier_block *nb, 3240 unsigned long action, void *data) 3241 { 3242 int ret = NOTIFY_BAD; 3243 struct memory_notify *arg = data; 3244 3245 mutex_lock(&dlpar_mem_lock); 3246 3247 switch (action) { 3248 case MEM_CANCEL_OFFLINE: 3249 pr_info("memory offlining canceled"); 3250 /* Fall through - re-add canceled memory block */ 3251 3252 case MEM_ONLINE: 3253 pr_info("memory is going online"); 3254 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3255 if (ehea_add_sect_bmap(arg->start_pfn, arg->nr_pages)) 3256 goto out_unlock; 3257 ehea_rereg_mrs(); 3258 break; 3259 3260 case MEM_GOING_OFFLINE: 3261 pr_info("memory is going offline"); 3262 set_bit(__EHEA_STOP_XFER, &ehea_driver_flags); 3263 if (ehea_rem_sect_bmap(arg->start_pfn, arg->nr_pages)) 3264 goto out_unlock; 3265 ehea_rereg_mrs(); 3266 break; 3267 3268 default: 3269 break; 3270 } 3271 3272 ehea_update_firmware_handles(); 3273 ret = NOTIFY_OK; 3274 3275 out_unlock: 3276 mutex_unlock(&dlpar_mem_lock); 3277 return ret; 3278 } 3279 3280 static struct notifier_block ehea_mem_nb = { 3281 .notifier_call = ehea_mem_notifier, 3282 }; 3283 3284 static void ehea_crash_handler(void) 3285 { 3286 int i; 3287 3288 if (ehea_fw_handles.arr) 3289 for (i = 0; i < ehea_fw_handles.num_entries; i++) 3290 ehea_h_free_resource(ehea_fw_handles.arr[i].adh, 3291 ehea_fw_handles.arr[i].fwh, 3292 FORCE_FREE); 3293 3294 if (ehea_bcmc_regs.arr) 3295 for (i = 0; i < ehea_bcmc_regs.num_entries; i++) 3296 ehea_h_reg_dereg_bcmc(ehea_bcmc_regs.arr[i].adh, 3297 ehea_bcmc_regs.arr[i].port_id, 3298 ehea_bcmc_regs.arr[i].reg_type, 3299 ehea_bcmc_regs.arr[i].macaddr, 3300 0, H_DEREG_BCMC); 3301 } 3302 3303 static atomic_t ehea_memory_hooks_registered; 3304 3305 /* Register memory hooks on probe of first adapter */ 3306 static int ehea_register_memory_hooks(void) 3307 { 3308 int ret = 0; 3309 3310 if (atomic_inc_return(&ehea_memory_hooks_registered) > 1) 3311 return 0; 3312 3313 ret = ehea_create_busmap(); 3314 if (ret) { 3315 pr_info("ehea_create_busmap failed\n"); 3316 goto out; 3317 } 3318 3319 ret = register_reboot_notifier(&ehea_reboot_nb); 3320 if (ret) { 3321 pr_info("register_reboot_notifier failed\n"); 3322 goto out; 3323 } 3324 3325 ret = register_memory_notifier(&ehea_mem_nb); 3326 if (ret) { 3327 pr_info("register_memory_notifier failed\n"); 3328 goto out2; 3329 } 3330 3331 ret = crash_shutdown_register(ehea_crash_handler); 3332 if (ret) { 3333 pr_info("crash_shutdown_register failed\n"); 3334 goto out3; 3335 } 3336 3337 return 0; 3338 3339 out3: 3340 unregister_memory_notifier(&ehea_mem_nb); 3341 out2: 3342 unregister_reboot_notifier(&ehea_reboot_nb); 3343 out: 3344 atomic_dec(&ehea_memory_hooks_registered); 3345 return ret; 3346 } 3347 3348 static void ehea_unregister_memory_hooks(void) 3349 { 3350 /* Only remove the hooks if we've registered them */ 3351 if (atomic_read(&ehea_memory_hooks_registered) == 0) 3352 return; 3353 3354 unregister_reboot_notifier(&ehea_reboot_nb); 3355 if (crash_shutdown_unregister(ehea_crash_handler)) 3356 pr_info("failed unregistering crash handler\n"); 3357 unregister_memory_notifier(&ehea_mem_nb); 3358 } 3359 3360 static int ehea_probe_adapter(struct platform_device *dev) 3361 { 3362 struct ehea_adapter *adapter; 3363 const u64 *adapter_handle; 3364 int ret; 3365 int i; 3366 3367 ret = ehea_register_memory_hooks(); 3368 if (ret) 3369 return ret; 3370 3371 if (!dev || !dev->dev.of_node) { 3372 pr_err("Invalid ibmebus device probed\n"); 3373 return -EINVAL; 3374 } 3375 3376 adapter = devm_kzalloc(&dev->dev, sizeof(*adapter), GFP_KERNEL); 3377 if (!adapter) { 3378 ret = -ENOMEM; 3379 dev_err(&dev->dev, "no mem for ehea_adapter\n"); 3380 goto out; 3381 } 3382 3383 list_add(&adapter->list, &adapter_list); 3384 3385 adapter->ofdev = dev; 3386 3387 adapter_handle = of_get_property(dev->dev.of_node, "ibm,hea-handle", 3388 NULL); 3389 if (adapter_handle) 3390 adapter->handle = *adapter_handle; 3391 3392 if (!adapter->handle) { 3393 dev_err(&dev->dev, "failed getting handle for adapter" 3394 " '%pOF'\n", dev->dev.of_node); 3395 ret = -ENODEV; 3396 goto out_free_ad; 3397 } 3398 3399 adapter->pd = EHEA_PD_ID; 3400 3401 platform_set_drvdata(dev, adapter); 3402 3403 3404 /* initialize adapter and ports */ 3405 /* get adapter properties */ 3406 ret = ehea_sense_adapter_attr(adapter); 3407 if (ret) { 3408 dev_err(&dev->dev, "sense_adapter_attr failed: %d\n", ret); 3409 goto out_free_ad; 3410 } 3411 3412 adapter->neq = ehea_create_eq(adapter, 3413 EHEA_NEQ, EHEA_MAX_ENTRIES_EQ, 1); 3414 if (!adapter->neq) { 3415 ret = -EIO; 3416 dev_err(&dev->dev, "NEQ creation failed\n"); 3417 goto out_free_ad; 3418 } 3419 3420 tasklet_init(&adapter->neq_tasklet, ehea_neq_tasklet, 3421 (unsigned long)adapter); 3422 3423 ret = ehea_create_device_sysfs(dev); 3424 if (ret) 3425 goto out_kill_eq; 3426 3427 ret = ehea_setup_ports(adapter); 3428 if (ret) { 3429 dev_err(&dev->dev, "setup_ports failed\n"); 3430 goto out_rem_dev_sysfs; 3431 } 3432 3433 ret = ibmebus_request_irq(adapter->neq->attr.ist1, 3434 ehea_interrupt_neq, 0, 3435 "ehea_neq", adapter); 3436 if (ret) { 3437 dev_err(&dev->dev, "requesting NEQ IRQ failed\n"); 3438 goto out_shutdown_ports; 3439 } 3440 3441 /* Handle any events that might be pending. */ 3442 tasklet_hi_schedule(&adapter->neq_tasklet); 3443 3444 ret = 0; 3445 goto out; 3446 3447 out_shutdown_ports: 3448 for (i = 0; i < EHEA_MAX_PORTS; i++) 3449 if (adapter->port[i]) { 3450 ehea_shutdown_single_port(adapter->port[i]); 3451 adapter->port[i] = NULL; 3452 } 3453 3454 out_rem_dev_sysfs: 3455 ehea_remove_device_sysfs(dev); 3456 3457 out_kill_eq: 3458 ehea_destroy_eq(adapter->neq); 3459 3460 out_free_ad: 3461 list_del(&adapter->list); 3462 3463 out: 3464 ehea_update_firmware_handles(); 3465 3466 return ret; 3467 } 3468 3469 static int ehea_remove(struct platform_device *dev) 3470 { 3471 struct ehea_adapter *adapter = platform_get_drvdata(dev); 3472 int i; 3473 3474 for (i = 0; i < EHEA_MAX_PORTS; i++) 3475 if (adapter->port[i]) { 3476 ehea_shutdown_single_port(adapter->port[i]); 3477 adapter->port[i] = NULL; 3478 } 3479 3480 ehea_remove_device_sysfs(dev); 3481 3482 ibmebus_free_irq(adapter->neq->attr.ist1, adapter); 3483 tasklet_kill(&adapter->neq_tasklet); 3484 3485 ehea_destroy_eq(adapter->neq); 3486 ehea_remove_adapter_mr(adapter); 3487 list_del(&adapter->list); 3488 3489 ehea_update_firmware_handles(); 3490 3491 return 0; 3492 } 3493 3494 static int check_module_parm(void) 3495 { 3496 int ret = 0; 3497 3498 if ((rq1_entries < EHEA_MIN_ENTRIES_QP) || 3499 (rq1_entries > EHEA_MAX_ENTRIES_RQ1)) { 3500 pr_info("Bad parameter: rq1_entries\n"); 3501 ret = -EINVAL; 3502 } 3503 if ((rq2_entries < EHEA_MIN_ENTRIES_QP) || 3504 (rq2_entries > EHEA_MAX_ENTRIES_RQ2)) { 3505 pr_info("Bad parameter: rq2_entries\n"); 3506 ret = -EINVAL; 3507 } 3508 if ((rq3_entries < EHEA_MIN_ENTRIES_QP) || 3509 (rq3_entries > EHEA_MAX_ENTRIES_RQ3)) { 3510 pr_info("Bad parameter: rq3_entries\n"); 3511 ret = -EINVAL; 3512 } 3513 if ((sq_entries < EHEA_MIN_ENTRIES_QP) || 3514 (sq_entries > EHEA_MAX_ENTRIES_SQ)) { 3515 pr_info("Bad parameter: sq_entries\n"); 3516 ret = -EINVAL; 3517 } 3518 3519 return ret; 3520 } 3521 3522 static ssize_t capabilities_show(struct device_driver *drv, char *buf) 3523 { 3524 return sprintf(buf, "%d", EHEA_CAPABILITIES); 3525 } 3526 3527 static DRIVER_ATTR_RO(capabilities); 3528 3529 static int __init ehea_module_init(void) 3530 { 3531 int ret; 3532 3533 pr_info("IBM eHEA ethernet device driver (Release %s)\n", DRV_VERSION); 3534 3535 memset(&ehea_fw_handles, 0, sizeof(ehea_fw_handles)); 3536 memset(&ehea_bcmc_regs, 0, sizeof(ehea_bcmc_regs)); 3537 3538 mutex_init(&ehea_fw_handles.lock); 3539 spin_lock_init(&ehea_bcmc_regs.lock); 3540 3541 ret = check_module_parm(); 3542 if (ret) 3543 goto out; 3544 3545 ret = ibmebus_register_driver(&ehea_driver); 3546 if (ret) { 3547 pr_err("failed registering eHEA device driver on ebus\n"); 3548 goto out; 3549 } 3550 3551 ret = driver_create_file(&ehea_driver.driver, 3552 &driver_attr_capabilities); 3553 if (ret) { 3554 pr_err("failed to register capabilities attribute, ret=%d\n", 3555 ret); 3556 goto out2; 3557 } 3558 3559 return ret; 3560 3561 out2: 3562 ibmebus_unregister_driver(&ehea_driver); 3563 out: 3564 return ret; 3565 } 3566 3567 static void __exit ehea_module_exit(void) 3568 { 3569 driver_remove_file(&ehea_driver.driver, &driver_attr_capabilities); 3570 ibmebus_unregister_driver(&ehea_driver); 3571 ehea_unregister_memory_hooks(); 3572 kfree(ehea_fw_handles.arr); 3573 kfree(ehea_bcmc_regs.arr); 3574 ehea_destroy_busmap(); 3575 } 3576 3577 module_init(ehea_module_init); 3578 module_exit(ehea_module_exit); 3579