1 /**************************************************************************/ 2 /* */ 3 /* IBM System i and System p Virtual NIC Device Driver */ 4 /* Copyright (C) 2014 IBM Corp. */ 5 /* Santiago Leon (santi_leon@yahoo.com) */ 6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 7 /* John Allen (jallen@linux.vnet.ibm.com) */ 8 /* */ 9 /* This program is free software; you can redistribute it and/or modify */ 10 /* it under the terms of the GNU General Public License as published by */ 11 /* the Free Software Foundation; either version 2 of the License, or */ 12 /* (at your option) any later version. */ 13 /* */ 14 /* This program is distributed in the hope that it will be useful, */ 15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 17 /* GNU General Public License for more details. */ 18 /* */ 19 /* You should have received a copy of the GNU General Public License */ 20 /* along with this program. */ 21 /* */ 22 /* This module contains the implementation of a virtual ethernet device */ 23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 24 /* option of the RS/6000 Platform Architecture to interface with virtual */ 25 /* ethernet NICs that are presented to the partition by the hypervisor. */ 26 /* */ 27 /* Messages are passed between the VNIC driver and the VNIC server using */ 28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 29 /* issue and receive commands that initiate communication with the server */ 30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 31 /* are used by the driver to notify the server that a packet is */ 32 /* ready for transmission or that a buffer has been added to receive a */ 33 /* packet. Subsequently, sCRQs are used by the server to notify the */ 34 /* driver that a packet transmission has been completed or that a packet */ 35 /* has been received and placed in a waiting buffer. */ 36 /* */ 37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 38 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 39 /* or receive has been completed, the VNIC driver is required to use */ 40 /* "long term mapping". This entails that large, continuous DMA mapped */ 41 /* buffers are allocated on driver initialization and these buffers are */ 42 /* then continuously reused to pass skbs to and from the VNIC server. */ 43 /* */ 44 /**************************************************************************/ 45 46 #include <linux/module.h> 47 #include <linux/moduleparam.h> 48 #include <linux/types.h> 49 #include <linux/errno.h> 50 #include <linux/completion.h> 51 #include <linux/ioport.h> 52 #include <linux/dma-mapping.h> 53 #include <linux/kernel.h> 54 #include <linux/netdevice.h> 55 #include <linux/etherdevice.h> 56 #include <linux/skbuff.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/mm.h> 60 #include <linux/ethtool.h> 61 #include <linux/proc_fs.h> 62 #include <linux/in.h> 63 #include <linux/ip.h> 64 #include <linux/ipv6.h> 65 #include <linux/irq.h> 66 #include <linux/kthread.h> 67 #include <linux/seq_file.h> 68 #include <linux/interrupt.h> 69 #include <net/net_namespace.h> 70 #include <asm/hvcall.h> 71 #include <linux/atomic.h> 72 #include <asm/vio.h> 73 #include <asm/iommu.h> 74 #include <linux/uaccess.h> 75 #include <asm/firmware.h> 76 #include <linux/workqueue.h> 77 #include <linux/if_vlan.h> 78 79 #include "ibmvnic.h" 80 81 static const char ibmvnic_driver_name[] = "ibmvnic"; 82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 83 84 MODULE_AUTHOR("Santiago Leon"); 85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 86 MODULE_LICENSE("GPL"); 87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 88 89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 90 static int ibmvnic_remove(struct vio_dev *); 91 static void release_sub_crqs(struct ibmvnic_adapter *); 92 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 97 union sub_crq *sub_crq); 98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 100 static int enable_scrq_irq(struct ibmvnic_adapter *, 101 struct ibmvnic_sub_crq_queue *); 102 static int disable_scrq_irq(struct ibmvnic_adapter *, 103 struct ibmvnic_sub_crq_queue *); 104 static int pending_scrq(struct ibmvnic_adapter *, 105 struct ibmvnic_sub_crq_queue *); 106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 107 struct ibmvnic_sub_crq_queue *); 108 static int ibmvnic_poll(struct napi_struct *napi, int data); 109 static void send_map_query(struct ibmvnic_adapter *adapter); 110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 111 static void send_request_unmap(struct ibmvnic_adapter *, u8); 112 static void send_login(struct ibmvnic_adapter *adapter); 113 static void send_cap_queries(struct ibmvnic_adapter *adapter); 114 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 115 static int ibmvnic_init(struct ibmvnic_adapter *); 116 static void release_crq_queue(struct ibmvnic_adapter *); 117 118 struct ibmvnic_stat { 119 char name[ETH_GSTRING_LEN]; 120 int offset; 121 }; 122 123 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 124 offsetof(struct ibmvnic_statistics, stat)) 125 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 126 127 static const struct ibmvnic_stat ibmvnic_stats[] = { 128 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 129 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 130 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 131 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 132 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 133 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 134 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 135 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 136 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 137 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 138 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 139 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 140 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 141 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 142 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 143 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 144 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 145 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 146 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 147 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 148 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 149 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 150 }; 151 152 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 153 unsigned long length, unsigned long *number, 154 unsigned long *irq) 155 { 156 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 157 long rc; 158 159 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 160 *number = retbuf[0]; 161 *irq = retbuf[1]; 162 163 return rc; 164 } 165 166 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 167 struct ibmvnic_long_term_buff *ltb, int size) 168 { 169 struct device *dev = &adapter->vdev->dev; 170 171 ltb->size = size; 172 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 173 GFP_KERNEL); 174 175 if (!ltb->buff) { 176 dev_err(dev, "Couldn't alloc long term buffer\n"); 177 return -ENOMEM; 178 } 179 ltb->map_id = adapter->map_id; 180 adapter->map_id++; 181 182 init_completion(&adapter->fw_done); 183 send_request_map(adapter, ltb->addr, 184 ltb->size, ltb->map_id); 185 wait_for_completion(&adapter->fw_done); 186 return 0; 187 } 188 189 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 190 struct ibmvnic_long_term_buff *ltb) 191 { 192 struct device *dev = &adapter->vdev->dev; 193 194 if (!ltb->buff) 195 return; 196 197 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 198 adapter->reset_reason != VNIC_RESET_MOBILITY) 199 send_request_unmap(adapter, ltb->map_id); 200 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 201 } 202 203 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 204 struct ibmvnic_rx_pool *pool) 205 { 206 int count = pool->size - atomic_read(&pool->available); 207 struct device *dev = &adapter->vdev->dev; 208 int buffers_added = 0; 209 unsigned long lpar_rc; 210 union sub_crq sub_crq; 211 struct sk_buff *skb; 212 unsigned int offset; 213 dma_addr_t dma_addr; 214 unsigned char *dst; 215 u64 *handle_array; 216 int shift = 0; 217 int index; 218 int i; 219 220 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 221 be32_to_cpu(adapter->login_rsp_buf-> 222 off_rxadd_subcrqs)); 223 224 for (i = 0; i < count; ++i) { 225 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 226 if (!skb) { 227 dev_err(dev, "Couldn't replenish rx buff\n"); 228 adapter->replenish_no_mem++; 229 break; 230 } 231 232 index = pool->free_map[pool->next_free]; 233 234 if (pool->rx_buff[index].skb) 235 dev_err(dev, "Inconsistent free_map!\n"); 236 237 /* Copy the skb to the long term mapped DMA buffer */ 238 offset = index * pool->buff_size; 239 dst = pool->long_term_buff.buff + offset; 240 memset(dst, 0, pool->buff_size); 241 dma_addr = pool->long_term_buff.addr + offset; 242 pool->rx_buff[index].data = dst; 243 244 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 245 pool->rx_buff[index].dma = dma_addr; 246 pool->rx_buff[index].skb = skb; 247 pool->rx_buff[index].pool_index = pool->index; 248 pool->rx_buff[index].size = pool->buff_size; 249 250 memset(&sub_crq, 0, sizeof(sub_crq)); 251 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 252 sub_crq.rx_add.correlator = 253 cpu_to_be64((u64)&pool->rx_buff[index]); 254 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 255 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 256 257 /* The length field of the sCRQ is defined to be 24 bits so the 258 * buffer size needs to be left shifted by a byte before it is 259 * converted to big endian to prevent the last byte from being 260 * truncated. 261 */ 262 #ifdef __LITTLE_ENDIAN__ 263 shift = 8; 264 #endif 265 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 266 267 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 268 &sub_crq); 269 if (lpar_rc != H_SUCCESS) 270 goto failure; 271 272 buffers_added++; 273 adapter->replenish_add_buff_success++; 274 pool->next_free = (pool->next_free + 1) % pool->size; 275 } 276 atomic_add(buffers_added, &pool->available); 277 return; 278 279 failure: 280 dev_info(dev, "replenish pools failure\n"); 281 pool->free_map[pool->next_free] = index; 282 pool->rx_buff[index].skb = NULL; 283 if (!dma_mapping_error(dev, dma_addr)) 284 dma_unmap_single(dev, dma_addr, pool->buff_size, 285 DMA_FROM_DEVICE); 286 287 dev_kfree_skb_any(skb); 288 adapter->replenish_add_buff_failure++; 289 atomic_add(buffers_added, &pool->available); 290 } 291 292 static void replenish_pools(struct ibmvnic_adapter *adapter) 293 { 294 int i; 295 296 adapter->replenish_task_cycles++; 297 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 298 i++) { 299 if (adapter->rx_pool[i].active) 300 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 301 } 302 } 303 304 static void release_stats_token(struct ibmvnic_adapter *adapter) 305 { 306 struct device *dev = &adapter->vdev->dev; 307 308 if (!adapter->stats_token) 309 return; 310 311 dma_unmap_single(dev, adapter->stats_token, 312 sizeof(struct ibmvnic_statistics), 313 DMA_FROM_DEVICE); 314 adapter->stats_token = 0; 315 } 316 317 static int init_stats_token(struct ibmvnic_adapter *adapter) 318 { 319 struct device *dev = &adapter->vdev->dev; 320 dma_addr_t stok; 321 322 stok = dma_map_single(dev, &adapter->stats, 323 sizeof(struct ibmvnic_statistics), 324 DMA_FROM_DEVICE); 325 if (dma_mapping_error(dev, stok)) { 326 dev_err(dev, "Couldn't map stats buffer\n"); 327 return -1; 328 } 329 330 adapter->stats_token = stok; 331 return 0; 332 } 333 334 static void release_rx_pools(struct ibmvnic_adapter *adapter) 335 { 336 struct ibmvnic_rx_pool *rx_pool; 337 int rx_scrqs; 338 int i, j; 339 340 if (!adapter->rx_pool) 341 return; 342 343 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 344 for (i = 0; i < rx_scrqs; i++) { 345 rx_pool = &adapter->rx_pool[i]; 346 347 kfree(rx_pool->free_map); 348 free_long_term_buff(adapter, &rx_pool->long_term_buff); 349 350 if (!rx_pool->rx_buff) 351 continue; 352 353 for (j = 0; j < rx_pool->size; j++) { 354 if (rx_pool->rx_buff[j].skb) { 355 dev_kfree_skb_any(rx_pool->rx_buff[i].skb); 356 rx_pool->rx_buff[i].skb = NULL; 357 } 358 } 359 360 kfree(rx_pool->rx_buff); 361 } 362 363 kfree(adapter->rx_pool); 364 adapter->rx_pool = NULL; 365 } 366 367 static int init_rx_pools(struct net_device *netdev) 368 { 369 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 370 struct device *dev = &adapter->vdev->dev; 371 struct ibmvnic_rx_pool *rx_pool; 372 int rxadd_subcrqs; 373 u64 *size_array; 374 int i, j; 375 376 rxadd_subcrqs = 377 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 378 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 379 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 380 381 adapter->rx_pool = kcalloc(rxadd_subcrqs, 382 sizeof(struct ibmvnic_rx_pool), 383 GFP_KERNEL); 384 if (!adapter->rx_pool) { 385 dev_err(dev, "Failed to allocate rx pools\n"); 386 return -1; 387 } 388 389 for (i = 0; i < rxadd_subcrqs; i++) { 390 rx_pool = &adapter->rx_pool[i]; 391 392 netdev_dbg(adapter->netdev, 393 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n", 394 i, adapter->req_rx_add_entries_per_subcrq, 395 be64_to_cpu(size_array[i])); 396 397 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 398 rx_pool->index = i; 399 rx_pool->buff_size = be64_to_cpu(size_array[i]); 400 rx_pool->active = 1; 401 402 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 403 GFP_KERNEL); 404 if (!rx_pool->free_map) { 405 release_rx_pools(adapter); 406 return -1; 407 } 408 409 rx_pool->rx_buff = kcalloc(rx_pool->size, 410 sizeof(struct ibmvnic_rx_buff), 411 GFP_KERNEL); 412 if (!rx_pool->rx_buff) { 413 dev_err(dev, "Couldn't alloc rx buffers\n"); 414 release_rx_pools(adapter); 415 return -1; 416 } 417 418 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 419 rx_pool->size * rx_pool->buff_size)) { 420 release_rx_pools(adapter); 421 return -1; 422 } 423 424 for (j = 0; j < rx_pool->size; ++j) 425 rx_pool->free_map[j] = j; 426 427 atomic_set(&rx_pool->available, 0); 428 rx_pool->next_alloc = 0; 429 rx_pool->next_free = 0; 430 } 431 432 return 0; 433 } 434 435 static void release_tx_pools(struct ibmvnic_adapter *adapter) 436 { 437 struct ibmvnic_tx_pool *tx_pool; 438 int i, tx_scrqs; 439 440 if (!adapter->tx_pool) 441 return; 442 443 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 444 for (i = 0; i < tx_scrqs; i++) { 445 tx_pool = &adapter->tx_pool[i]; 446 kfree(tx_pool->tx_buff); 447 free_long_term_buff(adapter, &tx_pool->long_term_buff); 448 kfree(tx_pool->free_map); 449 } 450 451 kfree(adapter->tx_pool); 452 adapter->tx_pool = NULL; 453 } 454 455 static int init_tx_pools(struct net_device *netdev) 456 { 457 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 458 struct device *dev = &adapter->vdev->dev; 459 struct ibmvnic_tx_pool *tx_pool; 460 int tx_subcrqs; 461 int i, j; 462 463 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 464 adapter->tx_pool = kcalloc(tx_subcrqs, 465 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 466 if (!adapter->tx_pool) 467 return -1; 468 469 for (i = 0; i < tx_subcrqs; i++) { 470 tx_pool = &adapter->tx_pool[i]; 471 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq, 472 sizeof(struct ibmvnic_tx_buff), 473 GFP_KERNEL); 474 if (!tx_pool->tx_buff) { 475 dev_err(dev, "tx pool buffer allocation failed\n"); 476 release_tx_pools(adapter); 477 return -1; 478 } 479 480 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 481 adapter->req_tx_entries_per_subcrq * 482 adapter->req_mtu)) { 483 release_tx_pools(adapter); 484 return -1; 485 } 486 487 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq, 488 sizeof(int), GFP_KERNEL); 489 if (!tx_pool->free_map) { 490 release_tx_pools(adapter); 491 return -1; 492 } 493 494 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 495 tx_pool->free_map[j] = j; 496 497 tx_pool->consumer_index = 0; 498 tx_pool->producer_index = 0; 499 } 500 501 return 0; 502 } 503 504 static void release_error_buffers(struct ibmvnic_adapter *adapter) 505 { 506 struct device *dev = &adapter->vdev->dev; 507 struct ibmvnic_error_buff *error_buff, *tmp; 508 unsigned long flags; 509 510 spin_lock_irqsave(&adapter->error_list_lock, flags); 511 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) { 512 list_del(&error_buff->list); 513 dma_unmap_single(dev, error_buff->dma, error_buff->len, 514 DMA_FROM_DEVICE); 515 kfree(error_buff->buff); 516 kfree(error_buff); 517 } 518 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 519 } 520 521 static int ibmvnic_login(struct net_device *netdev) 522 { 523 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 524 unsigned long timeout = msecs_to_jiffies(30000); 525 struct device *dev = &adapter->vdev->dev; 526 527 do { 528 if (adapter->renegotiate) { 529 adapter->renegotiate = false; 530 release_sub_crqs(adapter); 531 532 reinit_completion(&adapter->init_done); 533 send_cap_queries(adapter); 534 if (!wait_for_completion_timeout(&adapter->init_done, 535 timeout)) { 536 dev_err(dev, "Capabilities query timeout\n"); 537 return -1; 538 } 539 } 540 541 reinit_completion(&adapter->init_done); 542 send_login(adapter); 543 if (!wait_for_completion_timeout(&adapter->init_done, 544 timeout)) { 545 dev_err(dev, "Login timeout\n"); 546 return -1; 547 } 548 } while (adapter->renegotiate); 549 550 return 0; 551 } 552 553 static void release_resources(struct ibmvnic_adapter *adapter) 554 { 555 int i; 556 557 release_tx_pools(adapter); 558 release_rx_pools(adapter); 559 560 release_stats_token(adapter); 561 release_error_buffers(adapter); 562 563 if (adapter->napi) { 564 for (i = 0; i < adapter->req_rx_queues; i++) { 565 if (&adapter->napi[i]) 566 netif_napi_del(&adapter->napi[i]); 567 } 568 } 569 } 570 571 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 572 { 573 struct net_device *netdev = adapter->netdev; 574 unsigned long timeout = msecs_to_jiffies(30000); 575 union ibmvnic_crq crq; 576 bool resend; 577 int rc; 578 579 netdev_err(netdev, "setting link state %d\n", link_state); 580 memset(&crq, 0, sizeof(crq)); 581 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 582 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 583 crq.logical_link_state.link_state = link_state; 584 585 do { 586 resend = false; 587 588 reinit_completion(&adapter->init_done); 589 rc = ibmvnic_send_crq(adapter, &crq); 590 if (rc) { 591 netdev_err(netdev, "Failed to set link state\n"); 592 return rc; 593 } 594 595 if (!wait_for_completion_timeout(&adapter->init_done, 596 timeout)) { 597 netdev_err(netdev, "timeout setting link state\n"); 598 return -1; 599 } 600 601 if (adapter->init_done_rc == 1) { 602 /* Partuial success, delay and re-send */ 603 mdelay(1000); 604 resend = true; 605 } 606 } while (resend); 607 608 return 0; 609 } 610 611 static int set_real_num_queues(struct net_device *netdev) 612 { 613 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 614 int rc; 615 616 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 617 if (rc) { 618 netdev_err(netdev, "failed to set the number of tx queues\n"); 619 return rc; 620 } 621 622 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 623 if (rc) 624 netdev_err(netdev, "failed to set the number of rx queues\n"); 625 626 return rc; 627 } 628 629 static int init_resources(struct ibmvnic_adapter *adapter) 630 { 631 struct net_device *netdev = adapter->netdev; 632 int i, rc; 633 634 rc = set_real_num_queues(netdev); 635 if (rc) 636 return rc; 637 638 rc = init_sub_crq_irqs(adapter); 639 if (rc) { 640 netdev_err(netdev, "failed to initialize sub crq irqs\n"); 641 return -1; 642 } 643 644 rc = init_stats_token(adapter); 645 if (rc) 646 return rc; 647 648 adapter->map_id = 1; 649 adapter->napi = kcalloc(adapter->req_rx_queues, 650 sizeof(struct napi_struct), GFP_KERNEL); 651 if (!adapter->napi) 652 return -ENOMEM; 653 654 for (i = 0; i < adapter->req_rx_queues; i++) { 655 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, 656 NAPI_POLL_WEIGHT); 657 } 658 659 send_map_query(adapter); 660 661 rc = init_rx_pools(netdev); 662 if (rc) 663 return rc; 664 665 rc = init_tx_pools(netdev); 666 return rc; 667 } 668 669 static int __ibmvnic_open(struct net_device *netdev) 670 { 671 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 672 enum vnic_state prev_state = adapter->state; 673 int i, rc; 674 675 adapter->state = VNIC_OPENING; 676 replenish_pools(adapter); 677 678 for (i = 0; i < adapter->req_rx_queues; i++) 679 napi_enable(&adapter->napi[i]); 680 681 /* We're ready to receive frames, enable the sub-crq interrupts and 682 * set the logical link state to up 683 */ 684 for (i = 0; i < adapter->req_rx_queues; i++) { 685 if (prev_state == VNIC_CLOSED) 686 enable_irq(adapter->rx_scrq[i]->irq); 687 else 688 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 689 } 690 691 for (i = 0; i < adapter->req_tx_queues; i++) { 692 if (prev_state == VNIC_CLOSED) 693 enable_irq(adapter->tx_scrq[i]->irq); 694 else 695 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 696 } 697 698 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 699 if (rc) { 700 for (i = 0; i < adapter->req_rx_queues; i++) 701 napi_disable(&adapter->napi[i]); 702 release_resources(adapter); 703 return rc; 704 } 705 706 netif_tx_start_all_queues(netdev); 707 708 if (prev_state == VNIC_CLOSED) { 709 for (i = 0; i < adapter->req_rx_queues; i++) 710 napi_schedule(&adapter->napi[i]); 711 } 712 713 adapter->state = VNIC_OPEN; 714 return rc; 715 } 716 717 static int ibmvnic_open(struct net_device *netdev) 718 { 719 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 720 int rc; 721 722 mutex_lock(&adapter->reset_lock); 723 724 if (adapter->state != VNIC_CLOSED) { 725 rc = ibmvnic_login(netdev); 726 if (rc) { 727 mutex_unlock(&adapter->reset_lock); 728 return rc; 729 } 730 731 rc = init_resources(adapter); 732 if (rc) { 733 netdev_err(netdev, "failed to initialize resources\n"); 734 release_resources(adapter); 735 mutex_unlock(&adapter->reset_lock); 736 return rc; 737 } 738 } 739 740 rc = __ibmvnic_open(netdev); 741 mutex_unlock(&adapter->reset_lock); 742 743 return rc; 744 } 745 746 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 747 { 748 struct ibmvnic_tx_pool *tx_pool; 749 u64 tx_entries; 750 int tx_scrqs; 751 int i, j; 752 753 if (!adapter->tx_pool) 754 return; 755 756 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 757 tx_entries = adapter->req_tx_entries_per_subcrq; 758 759 /* Free any remaining skbs in the tx buffer pools */ 760 for (i = 0; i < tx_scrqs; i++) { 761 tx_pool = &adapter->tx_pool[i]; 762 if (!tx_pool) 763 continue; 764 765 for (j = 0; j < tx_entries; j++) { 766 if (tx_pool->tx_buff[j].skb) { 767 dev_kfree_skb_any(tx_pool->tx_buff[j].skb); 768 tx_pool->tx_buff[j].skb = NULL; 769 } 770 } 771 } 772 } 773 774 static int __ibmvnic_close(struct net_device *netdev) 775 { 776 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 777 int rc = 0; 778 int i; 779 780 adapter->state = VNIC_CLOSING; 781 netif_tx_stop_all_queues(netdev); 782 783 if (adapter->napi) { 784 for (i = 0; i < adapter->req_rx_queues; i++) 785 napi_disable(&adapter->napi[i]); 786 } 787 788 clean_tx_pools(adapter); 789 790 if (adapter->tx_scrq) { 791 for (i = 0; i < adapter->req_tx_queues; i++) 792 if (adapter->tx_scrq[i]->irq) 793 disable_irq(adapter->tx_scrq[i]->irq); 794 } 795 796 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 797 if (rc) 798 return rc; 799 800 if (adapter->rx_scrq) { 801 for (i = 0; i < adapter->req_rx_queues; i++) { 802 int retries = 10; 803 804 while (pending_scrq(adapter, adapter->rx_scrq[i])) { 805 retries--; 806 mdelay(100); 807 808 if (retries == 0) 809 break; 810 } 811 812 if (adapter->rx_scrq[i]->irq) 813 disable_irq(adapter->rx_scrq[i]->irq); 814 } 815 } 816 817 adapter->state = VNIC_CLOSED; 818 return rc; 819 } 820 821 static int ibmvnic_close(struct net_device *netdev) 822 { 823 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 824 int rc; 825 826 mutex_lock(&adapter->reset_lock); 827 rc = __ibmvnic_close(netdev); 828 mutex_unlock(&adapter->reset_lock); 829 830 return rc; 831 } 832 833 /** 834 * build_hdr_data - creates L2/L3/L4 header data buffer 835 * @hdr_field - bitfield determining needed headers 836 * @skb - socket buffer 837 * @hdr_len - array of header lengths 838 * @tot_len - total length of data 839 * 840 * Reads hdr_field to determine which headers are needed by firmware. 841 * Builds a buffer containing these headers. Saves individual header 842 * lengths and total buffer length to be used to build descriptors. 843 */ 844 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 845 int *hdr_len, u8 *hdr_data) 846 { 847 int len = 0; 848 u8 *hdr; 849 850 hdr_len[0] = sizeof(struct ethhdr); 851 852 if (skb->protocol == htons(ETH_P_IP)) { 853 hdr_len[1] = ip_hdr(skb)->ihl * 4; 854 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 855 hdr_len[2] = tcp_hdrlen(skb); 856 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 857 hdr_len[2] = sizeof(struct udphdr); 858 } else if (skb->protocol == htons(ETH_P_IPV6)) { 859 hdr_len[1] = sizeof(struct ipv6hdr); 860 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 861 hdr_len[2] = tcp_hdrlen(skb); 862 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 863 hdr_len[2] = sizeof(struct udphdr); 864 } 865 866 memset(hdr_data, 0, 120); 867 if ((hdr_field >> 6) & 1) { 868 hdr = skb_mac_header(skb); 869 memcpy(hdr_data, hdr, hdr_len[0]); 870 len += hdr_len[0]; 871 } 872 873 if ((hdr_field >> 5) & 1) { 874 hdr = skb_network_header(skb); 875 memcpy(hdr_data + len, hdr, hdr_len[1]); 876 len += hdr_len[1]; 877 } 878 879 if ((hdr_field >> 4) & 1) { 880 hdr = skb_transport_header(skb); 881 memcpy(hdr_data + len, hdr, hdr_len[2]); 882 len += hdr_len[2]; 883 } 884 return len; 885 } 886 887 /** 888 * create_hdr_descs - create header and header extension descriptors 889 * @hdr_field - bitfield determining needed headers 890 * @data - buffer containing header data 891 * @len - length of data buffer 892 * @hdr_len - array of individual header lengths 893 * @scrq_arr - descriptor array 894 * 895 * Creates header and, if needed, header extension descriptors and 896 * places them in a descriptor array, scrq_arr 897 */ 898 899 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 900 union sub_crq *scrq_arr) 901 { 902 union sub_crq hdr_desc; 903 int tmp_len = len; 904 u8 *data, *cur; 905 int tmp; 906 907 while (tmp_len > 0) { 908 cur = hdr_data + len - tmp_len; 909 910 memset(&hdr_desc, 0, sizeof(hdr_desc)); 911 if (cur != hdr_data) { 912 data = hdr_desc.hdr_ext.data; 913 tmp = tmp_len > 29 ? 29 : tmp_len; 914 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 915 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 916 hdr_desc.hdr_ext.len = tmp; 917 } else { 918 data = hdr_desc.hdr.data; 919 tmp = tmp_len > 24 ? 24 : tmp_len; 920 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 921 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 922 hdr_desc.hdr.len = tmp; 923 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 924 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 925 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 926 hdr_desc.hdr.flag = hdr_field << 1; 927 } 928 memcpy(data, cur, tmp); 929 tmp_len -= tmp; 930 *scrq_arr = hdr_desc; 931 scrq_arr++; 932 } 933 } 934 935 /** 936 * build_hdr_descs_arr - build a header descriptor array 937 * @skb - socket buffer 938 * @num_entries - number of descriptors to be sent 939 * @subcrq - first TX descriptor 940 * @hdr_field - bit field determining which headers will be sent 941 * 942 * This function will build a TX descriptor array with applicable 943 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 944 */ 945 946 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 947 int *num_entries, u8 hdr_field) 948 { 949 int hdr_len[3] = {0, 0, 0}; 950 int tot_len, len; 951 u8 *hdr_data = txbuff->hdr_data; 952 953 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 954 txbuff->hdr_data); 955 len = tot_len; 956 len -= 24; 957 if (len > 0) 958 num_entries += len % 29 ? len / 29 + 1 : len / 29; 959 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 960 txbuff->indir_arr + 1); 961 } 962 963 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 964 { 965 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 966 int queue_num = skb_get_queue_mapping(skb); 967 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 968 struct device *dev = &adapter->vdev->dev; 969 struct ibmvnic_tx_buff *tx_buff = NULL; 970 struct ibmvnic_sub_crq_queue *tx_scrq; 971 struct ibmvnic_tx_pool *tx_pool; 972 unsigned int tx_send_failed = 0; 973 unsigned int tx_map_failed = 0; 974 unsigned int tx_dropped = 0; 975 unsigned int tx_packets = 0; 976 unsigned int tx_bytes = 0; 977 dma_addr_t data_dma_addr; 978 struct netdev_queue *txq; 979 unsigned long lpar_rc; 980 union sub_crq tx_crq; 981 unsigned int offset; 982 int num_entries = 1; 983 unsigned char *dst; 984 u64 *handle_array; 985 int index = 0; 986 int ret = 0; 987 988 if (adapter->resetting) { 989 if (!netif_subqueue_stopped(netdev, skb)) 990 netif_stop_subqueue(netdev, queue_num); 991 dev_kfree_skb_any(skb); 992 993 tx_send_failed++; 994 tx_dropped++; 995 ret = NETDEV_TX_OK; 996 goto out; 997 } 998 999 tx_pool = &adapter->tx_pool[queue_num]; 1000 tx_scrq = adapter->tx_scrq[queue_num]; 1001 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1002 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1003 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1004 1005 index = tx_pool->free_map[tx_pool->consumer_index]; 1006 offset = index * adapter->req_mtu; 1007 dst = tx_pool->long_term_buff.buff + offset; 1008 memset(dst, 0, adapter->req_mtu); 1009 skb_copy_from_linear_data(skb, dst, skb->len); 1010 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1011 1012 tx_pool->consumer_index = 1013 (tx_pool->consumer_index + 1) % 1014 adapter->req_tx_entries_per_subcrq; 1015 1016 tx_buff = &tx_pool->tx_buff[index]; 1017 tx_buff->skb = skb; 1018 tx_buff->data_dma[0] = data_dma_addr; 1019 tx_buff->data_len[0] = skb->len; 1020 tx_buff->index = index; 1021 tx_buff->pool_index = queue_num; 1022 tx_buff->last_frag = true; 1023 1024 memset(&tx_crq, 0, sizeof(tx_crq)); 1025 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1026 tx_crq.v1.type = IBMVNIC_TX_DESC; 1027 tx_crq.v1.n_crq_elem = 1; 1028 tx_crq.v1.n_sge = 1; 1029 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1030 tx_crq.v1.correlator = cpu_to_be32(index); 1031 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1032 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1033 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1034 1035 if (adapter->vlan_header_insertion) { 1036 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1037 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1038 } 1039 1040 if (skb->protocol == htons(ETH_P_IP)) { 1041 if (ip_hdr(skb)->version == 4) 1042 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1043 else if (ip_hdr(skb)->version == 6) 1044 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1045 1046 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1047 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1048 else if (ip_hdr(skb)->protocol != IPPROTO_TCP) 1049 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1050 } 1051 1052 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1053 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1054 hdrs += 2; 1055 } 1056 /* determine if l2/3/4 headers are sent to firmware */ 1057 if ((*hdrs >> 7) & 1 && 1058 (skb->protocol == htons(ETH_P_IP) || 1059 skb->protocol == htons(ETH_P_IPV6))) { 1060 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1061 tx_crq.v1.n_crq_elem = num_entries; 1062 tx_buff->indir_arr[0] = tx_crq; 1063 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1064 sizeof(tx_buff->indir_arr), 1065 DMA_TO_DEVICE); 1066 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1067 dev_kfree_skb_any(skb); 1068 tx_buff->skb = NULL; 1069 if (!firmware_has_feature(FW_FEATURE_CMO)) 1070 dev_err(dev, "tx: unable to map descriptor array\n"); 1071 tx_map_failed++; 1072 tx_dropped++; 1073 ret = NETDEV_TX_OK; 1074 goto out; 1075 } 1076 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1077 (u64)tx_buff->indir_dma, 1078 (u64)num_entries); 1079 } else { 1080 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1081 &tx_crq); 1082 } 1083 if (lpar_rc != H_SUCCESS) { 1084 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 1085 1086 if (tx_pool->consumer_index == 0) 1087 tx_pool->consumer_index = 1088 adapter->req_tx_entries_per_subcrq - 1; 1089 else 1090 tx_pool->consumer_index--; 1091 1092 dev_kfree_skb_any(skb); 1093 tx_buff->skb = NULL; 1094 1095 if (lpar_rc == H_CLOSED) 1096 netif_stop_subqueue(netdev, queue_num); 1097 1098 tx_send_failed++; 1099 tx_dropped++; 1100 ret = NETDEV_TX_OK; 1101 goto out; 1102 } 1103 1104 if (atomic_inc_return(&tx_scrq->used) 1105 >= adapter->req_tx_entries_per_subcrq) { 1106 netdev_info(netdev, "Stopping queue %d\n", queue_num); 1107 netif_stop_subqueue(netdev, queue_num); 1108 } 1109 1110 tx_packets++; 1111 tx_bytes += skb->len; 1112 txq->trans_start = jiffies; 1113 ret = NETDEV_TX_OK; 1114 1115 out: 1116 netdev->stats.tx_dropped += tx_dropped; 1117 netdev->stats.tx_bytes += tx_bytes; 1118 netdev->stats.tx_packets += tx_packets; 1119 adapter->tx_send_failed += tx_send_failed; 1120 adapter->tx_map_failed += tx_map_failed; 1121 1122 return ret; 1123 } 1124 1125 static void ibmvnic_set_multi(struct net_device *netdev) 1126 { 1127 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1128 struct netdev_hw_addr *ha; 1129 union ibmvnic_crq crq; 1130 1131 memset(&crq, 0, sizeof(crq)); 1132 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1133 crq.request_capability.cmd = REQUEST_CAPABILITY; 1134 1135 if (netdev->flags & IFF_PROMISC) { 1136 if (!adapter->promisc_supported) 1137 return; 1138 } else { 1139 if (netdev->flags & IFF_ALLMULTI) { 1140 /* Accept all multicast */ 1141 memset(&crq, 0, sizeof(crq)); 1142 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1143 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1144 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1145 ibmvnic_send_crq(adapter, &crq); 1146 } else if (netdev_mc_empty(netdev)) { 1147 /* Reject all multicast */ 1148 memset(&crq, 0, sizeof(crq)); 1149 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1150 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1151 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1152 ibmvnic_send_crq(adapter, &crq); 1153 } else { 1154 /* Accept one or more multicast(s) */ 1155 netdev_for_each_mc_addr(ha, netdev) { 1156 memset(&crq, 0, sizeof(crq)); 1157 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1158 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1159 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1160 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1161 ha->addr); 1162 ibmvnic_send_crq(adapter, &crq); 1163 } 1164 } 1165 } 1166 } 1167 1168 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1169 { 1170 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1171 struct sockaddr *addr = p; 1172 union ibmvnic_crq crq; 1173 1174 if (!is_valid_ether_addr(addr->sa_data)) 1175 return -EADDRNOTAVAIL; 1176 1177 memset(&crq, 0, sizeof(crq)); 1178 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1179 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1180 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1181 ibmvnic_send_crq(adapter, &crq); 1182 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1183 return 0; 1184 } 1185 1186 /** 1187 * do_reset returns zero if we are able to keep processing reset events, or 1188 * non-zero if we hit a fatal error and must halt. 1189 */ 1190 static int do_reset(struct ibmvnic_adapter *adapter, 1191 struct ibmvnic_rwi *rwi, u32 reset_state) 1192 { 1193 struct net_device *netdev = adapter->netdev; 1194 int i, rc; 1195 1196 netif_carrier_off(netdev); 1197 adapter->reset_reason = rwi->reset_reason; 1198 1199 if (rwi->reset_reason == VNIC_RESET_MOBILITY) { 1200 rc = ibmvnic_reenable_crq_queue(adapter); 1201 if (rc) 1202 return 0; 1203 } 1204 1205 rc = __ibmvnic_close(netdev); 1206 if (rc) 1207 return rc; 1208 1209 /* remove the closed state so when we call open it appears 1210 * we are coming from the probed state. 1211 */ 1212 adapter->state = VNIC_PROBED; 1213 1214 release_resources(adapter); 1215 release_sub_crqs(adapter); 1216 release_crq_queue(adapter); 1217 1218 rc = ibmvnic_init(adapter); 1219 if (rc) 1220 return 0; 1221 1222 /* If the adapter was in PROBE state prior to the reset, exit here. */ 1223 if (reset_state == VNIC_PROBED) 1224 return 0; 1225 1226 rc = ibmvnic_login(netdev); 1227 if (rc) { 1228 adapter->state = VNIC_PROBED; 1229 return 0; 1230 } 1231 1232 rtnl_lock(); 1233 rc = init_resources(adapter); 1234 rtnl_unlock(); 1235 if (rc) 1236 return rc; 1237 1238 if (reset_state == VNIC_CLOSED) 1239 return 0; 1240 1241 rc = __ibmvnic_open(netdev); 1242 if (rc) { 1243 if (list_empty(&adapter->rwi_list)) 1244 adapter->state = VNIC_CLOSED; 1245 else 1246 adapter->state = reset_state; 1247 1248 return 0; 1249 } 1250 1251 netif_carrier_on(netdev); 1252 1253 /* kick napi */ 1254 for (i = 0; i < adapter->req_rx_queues; i++) 1255 napi_schedule(&adapter->napi[i]); 1256 1257 return 0; 1258 } 1259 1260 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1261 { 1262 struct ibmvnic_rwi *rwi; 1263 1264 mutex_lock(&adapter->rwi_lock); 1265 1266 if (!list_empty(&adapter->rwi_list)) { 1267 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1268 list); 1269 list_del(&rwi->list); 1270 } else { 1271 rwi = NULL; 1272 } 1273 1274 mutex_unlock(&adapter->rwi_lock); 1275 return rwi; 1276 } 1277 1278 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1279 { 1280 struct ibmvnic_rwi *rwi; 1281 1282 rwi = get_next_rwi(adapter); 1283 while (rwi) { 1284 kfree(rwi); 1285 rwi = get_next_rwi(adapter); 1286 } 1287 } 1288 1289 static void __ibmvnic_reset(struct work_struct *work) 1290 { 1291 struct ibmvnic_rwi *rwi; 1292 struct ibmvnic_adapter *adapter; 1293 struct net_device *netdev; 1294 u32 reset_state; 1295 int rc; 1296 1297 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1298 netdev = adapter->netdev; 1299 1300 mutex_lock(&adapter->reset_lock); 1301 adapter->resetting = true; 1302 reset_state = adapter->state; 1303 1304 rwi = get_next_rwi(adapter); 1305 while (rwi) { 1306 rc = do_reset(adapter, rwi, reset_state); 1307 kfree(rwi); 1308 if (rc) 1309 break; 1310 1311 rwi = get_next_rwi(adapter); 1312 } 1313 1314 if (rc) { 1315 free_all_rwi(adapter); 1316 return; 1317 } 1318 1319 adapter->resetting = false; 1320 mutex_unlock(&adapter->reset_lock); 1321 } 1322 1323 static void ibmvnic_reset(struct ibmvnic_adapter *adapter, 1324 enum ibmvnic_reset_reason reason) 1325 { 1326 struct ibmvnic_rwi *rwi, *tmp; 1327 struct net_device *netdev = adapter->netdev; 1328 struct list_head *entry; 1329 1330 if (adapter->state == VNIC_REMOVING || 1331 adapter->state == VNIC_REMOVED) { 1332 netdev_dbg(netdev, "Adapter removing, skipping reset\n"); 1333 return; 1334 } 1335 1336 mutex_lock(&adapter->rwi_lock); 1337 1338 list_for_each(entry, &adapter->rwi_list) { 1339 tmp = list_entry(entry, struct ibmvnic_rwi, list); 1340 if (tmp->reset_reason == reason) { 1341 netdev_err(netdev, "Matching reset found, skipping\n"); 1342 mutex_unlock(&adapter->rwi_lock); 1343 return; 1344 } 1345 } 1346 1347 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL); 1348 if (!rwi) { 1349 mutex_unlock(&adapter->rwi_lock); 1350 ibmvnic_close(netdev); 1351 return; 1352 } 1353 1354 rwi->reset_reason = reason; 1355 list_add_tail(&rwi->list, &adapter->rwi_list); 1356 mutex_unlock(&adapter->rwi_lock); 1357 schedule_work(&adapter->ibmvnic_reset); 1358 } 1359 1360 static void ibmvnic_tx_timeout(struct net_device *dev) 1361 { 1362 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1363 1364 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 1365 } 1366 1367 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 1368 struct ibmvnic_rx_buff *rx_buff) 1369 { 1370 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 1371 1372 rx_buff->skb = NULL; 1373 1374 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 1375 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 1376 1377 atomic_dec(&pool->available); 1378 } 1379 1380 static int ibmvnic_poll(struct napi_struct *napi, int budget) 1381 { 1382 struct net_device *netdev = napi->dev; 1383 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1384 int scrq_num = (int)(napi - adapter->napi); 1385 int frames_processed = 0; 1386 restart_poll: 1387 while (frames_processed < budget) { 1388 struct sk_buff *skb; 1389 struct ibmvnic_rx_buff *rx_buff; 1390 union sub_crq *next; 1391 u32 length; 1392 u16 offset; 1393 u8 flags = 0; 1394 1395 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 1396 break; 1397 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 1398 rx_buff = 1399 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 1400 rx_comp.correlator); 1401 /* do error checking */ 1402 if (next->rx_comp.rc) { 1403 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); 1404 /* free the entry */ 1405 next->rx_comp.first = 0; 1406 remove_buff_from_pool(adapter, rx_buff); 1407 continue; 1408 } 1409 1410 length = be32_to_cpu(next->rx_comp.len); 1411 offset = be16_to_cpu(next->rx_comp.off_frame_data); 1412 flags = next->rx_comp.flags; 1413 skb = rx_buff->skb; 1414 skb_copy_to_linear_data(skb, rx_buff->data + offset, 1415 length); 1416 1417 /* VLAN Header has been stripped by the system firmware and 1418 * needs to be inserted by the driver 1419 */ 1420 if (adapter->rx_vlan_header_insertion && 1421 (flags & IBMVNIC_VLAN_STRIPPED)) 1422 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1423 ntohs(next->rx_comp.vlan_tci)); 1424 1425 /* free the entry */ 1426 next->rx_comp.first = 0; 1427 remove_buff_from_pool(adapter, rx_buff); 1428 1429 skb_put(skb, length); 1430 skb->protocol = eth_type_trans(skb, netdev); 1431 skb_record_rx_queue(skb, scrq_num); 1432 1433 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 1434 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 1435 skb->ip_summed = CHECKSUM_UNNECESSARY; 1436 } 1437 1438 length = skb->len; 1439 napi_gro_receive(napi, skb); /* send it up */ 1440 netdev->stats.rx_packets++; 1441 netdev->stats.rx_bytes += length; 1442 frames_processed++; 1443 } 1444 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 1445 1446 if (frames_processed < budget) { 1447 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1448 napi_complete_done(napi, frames_processed); 1449 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1450 napi_reschedule(napi)) { 1451 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1452 goto restart_poll; 1453 } 1454 } 1455 return frames_processed; 1456 } 1457 1458 #ifdef CONFIG_NET_POLL_CONTROLLER 1459 static void ibmvnic_netpoll_controller(struct net_device *dev) 1460 { 1461 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1462 int i; 1463 1464 replenish_pools(netdev_priv(dev)); 1465 for (i = 0; i < adapter->req_rx_queues; i++) 1466 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1467 adapter->rx_scrq[i]); 1468 } 1469 #endif 1470 1471 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 1472 { 1473 return -EOPNOTSUPP; 1474 } 1475 1476 static const struct net_device_ops ibmvnic_netdev_ops = { 1477 .ndo_open = ibmvnic_open, 1478 .ndo_stop = ibmvnic_close, 1479 .ndo_start_xmit = ibmvnic_xmit, 1480 .ndo_set_rx_mode = ibmvnic_set_multi, 1481 .ndo_set_mac_address = ibmvnic_set_mac, 1482 .ndo_validate_addr = eth_validate_addr, 1483 .ndo_tx_timeout = ibmvnic_tx_timeout, 1484 #ifdef CONFIG_NET_POLL_CONTROLLER 1485 .ndo_poll_controller = ibmvnic_netpoll_controller, 1486 #endif 1487 .ndo_change_mtu = ibmvnic_change_mtu, 1488 }; 1489 1490 /* ethtool functions */ 1491 1492 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 1493 struct ethtool_link_ksettings *cmd) 1494 { 1495 u32 supported, advertising; 1496 1497 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 1498 SUPPORTED_FIBRE); 1499 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 1500 ADVERTISED_FIBRE); 1501 cmd->base.speed = SPEED_1000; 1502 cmd->base.duplex = DUPLEX_FULL; 1503 cmd->base.port = PORT_FIBRE; 1504 cmd->base.phy_address = 0; 1505 cmd->base.autoneg = AUTONEG_ENABLE; 1506 1507 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1508 supported); 1509 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1510 advertising); 1511 1512 return 0; 1513 } 1514 1515 static void ibmvnic_get_drvinfo(struct net_device *dev, 1516 struct ethtool_drvinfo *info) 1517 { 1518 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 1519 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 1520 } 1521 1522 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 1523 { 1524 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1525 1526 return adapter->msg_enable; 1527 } 1528 1529 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 1530 { 1531 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1532 1533 adapter->msg_enable = data; 1534 } 1535 1536 static u32 ibmvnic_get_link(struct net_device *netdev) 1537 { 1538 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1539 1540 /* Don't need to send a query because we request a logical link up at 1541 * init and then we wait for link state indications 1542 */ 1543 return adapter->logical_link_state; 1544 } 1545 1546 static void ibmvnic_get_ringparam(struct net_device *netdev, 1547 struct ethtool_ringparam *ring) 1548 { 1549 ring->rx_max_pending = 0; 1550 ring->tx_max_pending = 0; 1551 ring->rx_mini_max_pending = 0; 1552 ring->rx_jumbo_max_pending = 0; 1553 ring->rx_pending = 0; 1554 ring->tx_pending = 0; 1555 ring->rx_mini_pending = 0; 1556 ring->rx_jumbo_pending = 0; 1557 } 1558 1559 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 1560 { 1561 int i; 1562 1563 if (stringset != ETH_SS_STATS) 1564 return; 1565 1566 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 1567 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 1568 } 1569 1570 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 1571 { 1572 switch (sset) { 1573 case ETH_SS_STATS: 1574 return ARRAY_SIZE(ibmvnic_stats); 1575 default: 1576 return -EOPNOTSUPP; 1577 } 1578 } 1579 1580 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 1581 struct ethtool_stats *stats, u64 *data) 1582 { 1583 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1584 union ibmvnic_crq crq; 1585 int i; 1586 1587 memset(&crq, 0, sizeof(crq)); 1588 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 1589 crq.request_statistics.cmd = REQUEST_STATISTICS; 1590 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 1591 crq.request_statistics.len = 1592 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 1593 1594 /* Wait for data to be written */ 1595 init_completion(&adapter->stats_done); 1596 ibmvnic_send_crq(adapter, &crq); 1597 wait_for_completion(&adapter->stats_done); 1598 1599 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 1600 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); 1601 } 1602 1603 static const struct ethtool_ops ibmvnic_ethtool_ops = { 1604 .get_drvinfo = ibmvnic_get_drvinfo, 1605 .get_msglevel = ibmvnic_get_msglevel, 1606 .set_msglevel = ibmvnic_set_msglevel, 1607 .get_link = ibmvnic_get_link, 1608 .get_ringparam = ibmvnic_get_ringparam, 1609 .get_strings = ibmvnic_get_strings, 1610 .get_sset_count = ibmvnic_get_sset_count, 1611 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 1612 .get_link_ksettings = ibmvnic_get_link_ksettings, 1613 }; 1614 1615 /* Routines for managing CRQs/sCRQs */ 1616 1617 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 1618 struct ibmvnic_sub_crq_queue *scrq) 1619 { 1620 struct device *dev = &adapter->vdev->dev; 1621 long rc; 1622 1623 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 1624 1625 /* Close the sub-crqs */ 1626 do { 1627 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 1628 adapter->vdev->unit_address, 1629 scrq->crq_num); 1630 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 1631 1632 if (rc) { 1633 netdev_err(adapter->netdev, 1634 "Failed to release sub-CRQ %16lx, rc = %ld\n", 1635 scrq->crq_num, rc); 1636 } 1637 1638 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1639 DMA_BIDIRECTIONAL); 1640 free_pages((unsigned long)scrq->msgs, 2); 1641 kfree(scrq); 1642 } 1643 1644 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 1645 *adapter) 1646 { 1647 struct device *dev = &adapter->vdev->dev; 1648 struct ibmvnic_sub_crq_queue *scrq; 1649 int rc; 1650 1651 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 1652 if (!scrq) 1653 return NULL; 1654 1655 scrq->msgs = 1656 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 1657 if (!scrq->msgs) { 1658 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 1659 goto zero_page_failed; 1660 } 1661 1662 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 1663 DMA_BIDIRECTIONAL); 1664 if (dma_mapping_error(dev, scrq->msg_token)) { 1665 dev_warn(dev, "Couldn't map crq queue messages page\n"); 1666 goto map_failed; 1667 } 1668 1669 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1670 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1671 1672 if (rc == H_RESOURCE) 1673 rc = ibmvnic_reset_crq(adapter); 1674 1675 if (rc == H_CLOSED) { 1676 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 1677 } else if (rc) { 1678 dev_warn(dev, "Error %d registering sub-crq\n", rc); 1679 goto reg_failed; 1680 } 1681 1682 scrq->adapter = adapter; 1683 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 1684 spin_lock_init(&scrq->lock); 1685 1686 netdev_dbg(adapter->netdev, 1687 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 1688 scrq->crq_num, scrq->hw_irq, scrq->irq); 1689 1690 return scrq; 1691 1692 reg_failed: 1693 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1694 DMA_BIDIRECTIONAL); 1695 map_failed: 1696 free_pages((unsigned long)scrq->msgs, 2); 1697 zero_page_failed: 1698 kfree(scrq); 1699 1700 return NULL; 1701 } 1702 1703 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 1704 { 1705 int i; 1706 1707 if (adapter->tx_scrq) { 1708 for (i = 0; i < adapter->req_tx_queues; i++) { 1709 if (!adapter->tx_scrq[i]) 1710 continue; 1711 1712 if (adapter->tx_scrq[i]->irq) { 1713 free_irq(adapter->tx_scrq[i]->irq, 1714 adapter->tx_scrq[i]); 1715 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 1716 adapter->tx_scrq[i]->irq = 0; 1717 } 1718 1719 release_sub_crq_queue(adapter, adapter->tx_scrq[i]); 1720 } 1721 1722 kfree(adapter->tx_scrq); 1723 adapter->tx_scrq = NULL; 1724 } 1725 1726 if (adapter->rx_scrq) { 1727 for (i = 0; i < adapter->req_rx_queues; i++) { 1728 if (!adapter->rx_scrq[i]) 1729 continue; 1730 1731 if (adapter->rx_scrq[i]->irq) { 1732 free_irq(adapter->rx_scrq[i]->irq, 1733 adapter->rx_scrq[i]); 1734 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 1735 adapter->rx_scrq[i]->irq = 0; 1736 } 1737 1738 release_sub_crq_queue(adapter, adapter->rx_scrq[i]); 1739 } 1740 1741 kfree(adapter->rx_scrq); 1742 adapter->rx_scrq = NULL; 1743 } 1744 } 1745 1746 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 1747 struct ibmvnic_sub_crq_queue *scrq) 1748 { 1749 struct device *dev = &adapter->vdev->dev; 1750 unsigned long rc; 1751 1752 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1753 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1754 if (rc) 1755 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 1756 scrq->hw_irq, rc); 1757 return rc; 1758 } 1759 1760 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 1761 struct ibmvnic_sub_crq_queue *scrq) 1762 { 1763 struct device *dev = &adapter->vdev->dev; 1764 unsigned long rc; 1765 1766 if (scrq->hw_irq > 0x100000000ULL) { 1767 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 1768 return 1; 1769 } 1770 1771 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1772 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1773 if (rc) 1774 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 1775 scrq->hw_irq, rc); 1776 return rc; 1777 } 1778 1779 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 1780 struct ibmvnic_sub_crq_queue *scrq) 1781 { 1782 struct device *dev = &adapter->vdev->dev; 1783 struct ibmvnic_tx_buff *txbuff; 1784 union sub_crq *next; 1785 int index; 1786 int i, j; 1787 u8 first; 1788 1789 restart_loop: 1790 while (pending_scrq(adapter, scrq)) { 1791 unsigned int pool = scrq->pool_index; 1792 1793 next = ibmvnic_next_scrq(adapter, scrq); 1794 for (i = 0; i < next->tx_comp.num_comps; i++) { 1795 if (next->tx_comp.rcs[i]) { 1796 dev_err(dev, "tx error %x\n", 1797 next->tx_comp.rcs[i]); 1798 continue; 1799 } 1800 index = be32_to_cpu(next->tx_comp.correlators[i]); 1801 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 1802 1803 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 1804 if (!txbuff->data_dma[j]) 1805 continue; 1806 1807 txbuff->data_dma[j] = 0; 1808 } 1809 /* if sub_crq was sent indirectly */ 1810 first = txbuff->indir_arr[0].generic.first; 1811 if (first == IBMVNIC_CRQ_CMD) { 1812 dma_unmap_single(dev, txbuff->indir_dma, 1813 sizeof(txbuff->indir_arr), 1814 DMA_TO_DEVICE); 1815 } 1816 1817 if (txbuff->last_frag) { 1818 dev_kfree_skb_any(txbuff->skb); 1819 txbuff->skb = NULL; 1820 } 1821 1822 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 1823 producer_index] = index; 1824 adapter->tx_pool[pool].producer_index = 1825 (adapter->tx_pool[pool].producer_index + 1) % 1826 adapter->req_tx_entries_per_subcrq; 1827 } 1828 /* remove tx_comp scrq*/ 1829 next->tx_comp.first = 0; 1830 1831 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <= 1832 (adapter->req_tx_entries_per_subcrq / 2) && 1833 __netif_subqueue_stopped(adapter->netdev, 1834 scrq->pool_index)) { 1835 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 1836 netdev_info(adapter->netdev, "Started queue %d\n", 1837 scrq->pool_index); 1838 } 1839 } 1840 1841 enable_scrq_irq(adapter, scrq); 1842 1843 if (pending_scrq(adapter, scrq)) { 1844 disable_scrq_irq(adapter, scrq); 1845 goto restart_loop; 1846 } 1847 1848 return 0; 1849 } 1850 1851 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 1852 { 1853 struct ibmvnic_sub_crq_queue *scrq = instance; 1854 struct ibmvnic_adapter *adapter = scrq->adapter; 1855 1856 disable_scrq_irq(adapter, scrq); 1857 ibmvnic_complete_tx(adapter, scrq); 1858 1859 return IRQ_HANDLED; 1860 } 1861 1862 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 1863 { 1864 struct ibmvnic_sub_crq_queue *scrq = instance; 1865 struct ibmvnic_adapter *adapter = scrq->adapter; 1866 1867 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 1868 disable_scrq_irq(adapter, scrq); 1869 __napi_schedule(&adapter->napi[scrq->scrq_num]); 1870 } 1871 1872 return IRQ_HANDLED; 1873 } 1874 1875 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 1876 { 1877 struct device *dev = &adapter->vdev->dev; 1878 struct ibmvnic_sub_crq_queue *scrq; 1879 int i = 0, j = 0; 1880 int rc = 0; 1881 1882 for (i = 0; i < adapter->req_tx_queues; i++) { 1883 scrq = adapter->tx_scrq[i]; 1884 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1885 1886 if (!scrq->irq) { 1887 rc = -EINVAL; 1888 dev_err(dev, "Error mapping irq\n"); 1889 goto req_tx_irq_failed; 1890 } 1891 1892 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 1893 0, "ibmvnic_tx", scrq); 1894 1895 if (rc) { 1896 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 1897 scrq->irq, rc); 1898 irq_dispose_mapping(scrq->irq); 1899 goto req_rx_irq_failed; 1900 } 1901 } 1902 1903 for (i = 0; i < adapter->req_rx_queues; i++) { 1904 scrq = adapter->rx_scrq[i]; 1905 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1906 if (!scrq->irq) { 1907 rc = -EINVAL; 1908 dev_err(dev, "Error mapping irq\n"); 1909 goto req_rx_irq_failed; 1910 } 1911 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 1912 0, "ibmvnic_rx", scrq); 1913 if (rc) { 1914 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 1915 scrq->irq, rc); 1916 irq_dispose_mapping(scrq->irq); 1917 goto req_rx_irq_failed; 1918 } 1919 } 1920 return rc; 1921 1922 req_rx_irq_failed: 1923 for (j = 0; j < i; j++) { 1924 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 1925 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1926 } 1927 i = adapter->req_tx_queues; 1928 req_tx_irq_failed: 1929 for (j = 0; j < i; j++) { 1930 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 1931 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1932 } 1933 release_sub_crqs(adapter); 1934 return rc; 1935 } 1936 1937 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 1938 { 1939 struct device *dev = &adapter->vdev->dev; 1940 struct ibmvnic_sub_crq_queue **allqueues; 1941 int registered_queues = 0; 1942 int total_queues; 1943 int more = 0; 1944 int i; 1945 1946 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 1947 1948 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 1949 if (!allqueues) 1950 return -1; 1951 1952 for (i = 0; i < total_queues; i++) { 1953 allqueues[i] = init_sub_crq_queue(adapter); 1954 if (!allqueues[i]) { 1955 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 1956 break; 1957 } 1958 registered_queues++; 1959 } 1960 1961 /* Make sure we were able to register the minimum number of queues */ 1962 if (registered_queues < 1963 adapter->min_tx_queues + adapter->min_rx_queues) { 1964 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 1965 goto tx_failed; 1966 } 1967 1968 /* Distribute the failed allocated queues*/ 1969 for (i = 0; i < total_queues - registered_queues + more ; i++) { 1970 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 1971 switch (i % 3) { 1972 case 0: 1973 if (adapter->req_rx_queues > adapter->min_rx_queues) 1974 adapter->req_rx_queues--; 1975 else 1976 more++; 1977 break; 1978 case 1: 1979 if (adapter->req_tx_queues > adapter->min_tx_queues) 1980 adapter->req_tx_queues--; 1981 else 1982 more++; 1983 break; 1984 } 1985 } 1986 1987 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 1988 sizeof(*adapter->tx_scrq), GFP_KERNEL); 1989 if (!adapter->tx_scrq) 1990 goto tx_failed; 1991 1992 for (i = 0; i < adapter->req_tx_queues; i++) { 1993 adapter->tx_scrq[i] = allqueues[i]; 1994 adapter->tx_scrq[i]->pool_index = i; 1995 } 1996 1997 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 1998 sizeof(*adapter->rx_scrq), GFP_KERNEL); 1999 if (!adapter->rx_scrq) 2000 goto rx_failed; 2001 2002 for (i = 0; i < adapter->req_rx_queues; i++) { 2003 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 2004 adapter->rx_scrq[i]->scrq_num = i; 2005 } 2006 2007 kfree(allqueues); 2008 return 0; 2009 2010 rx_failed: 2011 kfree(adapter->tx_scrq); 2012 adapter->tx_scrq = NULL; 2013 tx_failed: 2014 for (i = 0; i < registered_queues; i++) 2015 release_sub_crq_queue(adapter, allqueues[i]); 2016 kfree(allqueues); 2017 return -1; 2018 } 2019 2020 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 2021 { 2022 struct device *dev = &adapter->vdev->dev; 2023 union ibmvnic_crq crq; 2024 2025 if (!retry) { 2026 /* Sub-CRQ entries are 32 byte long */ 2027 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 2028 2029 if (adapter->min_tx_entries_per_subcrq > entries_page || 2030 adapter->min_rx_add_entries_per_subcrq > entries_page) { 2031 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 2032 return; 2033 } 2034 2035 /* Get the minimum between the queried max and the entries 2036 * that fit in our PAGE_SIZE 2037 */ 2038 adapter->req_tx_entries_per_subcrq = 2039 adapter->max_tx_entries_per_subcrq > entries_page ? 2040 entries_page : adapter->max_tx_entries_per_subcrq; 2041 adapter->req_rx_add_entries_per_subcrq = 2042 adapter->max_rx_add_entries_per_subcrq > entries_page ? 2043 entries_page : adapter->max_rx_add_entries_per_subcrq; 2044 2045 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; 2046 adapter->req_rx_queues = adapter->opt_rx_comp_queues; 2047 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 2048 2049 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 2050 } 2051 2052 memset(&crq, 0, sizeof(crq)); 2053 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2054 crq.request_capability.cmd = REQUEST_CAPABILITY; 2055 2056 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 2057 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 2058 atomic_inc(&adapter->running_cap_crqs); 2059 ibmvnic_send_crq(adapter, &crq); 2060 2061 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 2062 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 2063 atomic_inc(&adapter->running_cap_crqs); 2064 ibmvnic_send_crq(adapter, &crq); 2065 2066 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 2067 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 2068 atomic_inc(&adapter->running_cap_crqs); 2069 ibmvnic_send_crq(adapter, &crq); 2070 2071 crq.request_capability.capability = 2072 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 2073 crq.request_capability.number = 2074 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 2075 atomic_inc(&adapter->running_cap_crqs); 2076 ibmvnic_send_crq(adapter, &crq); 2077 2078 crq.request_capability.capability = 2079 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 2080 crq.request_capability.number = 2081 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 2082 atomic_inc(&adapter->running_cap_crqs); 2083 ibmvnic_send_crq(adapter, &crq); 2084 2085 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 2086 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 2087 atomic_inc(&adapter->running_cap_crqs); 2088 ibmvnic_send_crq(adapter, &crq); 2089 2090 if (adapter->netdev->flags & IFF_PROMISC) { 2091 if (adapter->promisc_supported) { 2092 crq.request_capability.capability = 2093 cpu_to_be16(PROMISC_REQUESTED); 2094 crq.request_capability.number = cpu_to_be64(1); 2095 atomic_inc(&adapter->running_cap_crqs); 2096 ibmvnic_send_crq(adapter, &crq); 2097 } 2098 } else { 2099 crq.request_capability.capability = 2100 cpu_to_be16(PROMISC_REQUESTED); 2101 crq.request_capability.number = cpu_to_be64(0); 2102 atomic_inc(&adapter->running_cap_crqs); 2103 ibmvnic_send_crq(adapter, &crq); 2104 } 2105 } 2106 2107 static int pending_scrq(struct ibmvnic_adapter *adapter, 2108 struct ibmvnic_sub_crq_queue *scrq) 2109 { 2110 union sub_crq *entry = &scrq->msgs[scrq->cur]; 2111 2112 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || 2113 adapter->state == VNIC_CLOSING) 2114 return 1; 2115 else 2116 return 0; 2117 } 2118 2119 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 2120 struct ibmvnic_sub_crq_queue *scrq) 2121 { 2122 union sub_crq *entry; 2123 unsigned long flags; 2124 2125 spin_lock_irqsave(&scrq->lock, flags); 2126 entry = &scrq->msgs[scrq->cur]; 2127 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2128 if (++scrq->cur == scrq->size) 2129 scrq->cur = 0; 2130 } else { 2131 entry = NULL; 2132 } 2133 spin_unlock_irqrestore(&scrq->lock, flags); 2134 2135 return entry; 2136 } 2137 2138 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 2139 { 2140 struct ibmvnic_crq_queue *queue = &adapter->crq; 2141 union ibmvnic_crq *crq; 2142 2143 crq = &queue->msgs[queue->cur]; 2144 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2145 if (++queue->cur == queue->size) 2146 queue->cur = 0; 2147 } else { 2148 crq = NULL; 2149 } 2150 2151 return crq; 2152 } 2153 2154 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 2155 union sub_crq *sub_crq) 2156 { 2157 unsigned int ua = adapter->vdev->unit_address; 2158 struct device *dev = &adapter->vdev->dev; 2159 u64 *u64_crq = (u64 *)sub_crq; 2160 int rc; 2161 2162 netdev_dbg(adapter->netdev, 2163 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 2164 (unsigned long int)cpu_to_be64(remote_handle), 2165 (unsigned long int)cpu_to_be64(u64_crq[0]), 2166 (unsigned long int)cpu_to_be64(u64_crq[1]), 2167 (unsigned long int)cpu_to_be64(u64_crq[2]), 2168 (unsigned long int)cpu_to_be64(u64_crq[3])); 2169 2170 /* Make sure the hypervisor sees the complete request */ 2171 mb(); 2172 2173 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 2174 cpu_to_be64(remote_handle), 2175 cpu_to_be64(u64_crq[0]), 2176 cpu_to_be64(u64_crq[1]), 2177 cpu_to_be64(u64_crq[2]), 2178 cpu_to_be64(u64_crq[3])); 2179 2180 if (rc) { 2181 if (rc == H_CLOSED) 2182 dev_warn(dev, "CRQ Queue closed\n"); 2183 dev_err(dev, "Send error (rc=%d)\n", rc); 2184 } 2185 2186 return rc; 2187 } 2188 2189 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 2190 u64 remote_handle, u64 ioba, u64 num_entries) 2191 { 2192 unsigned int ua = adapter->vdev->unit_address; 2193 struct device *dev = &adapter->vdev->dev; 2194 int rc; 2195 2196 /* Make sure the hypervisor sees the complete request */ 2197 mb(); 2198 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 2199 cpu_to_be64(remote_handle), 2200 ioba, num_entries); 2201 2202 if (rc) { 2203 if (rc == H_CLOSED) 2204 dev_warn(dev, "CRQ Queue closed\n"); 2205 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 2206 } 2207 2208 return rc; 2209 } 2210 2211 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 2212 union ibmvnic_crq *crq) 2213 { 2214 unsigned int ua = adapter->vdev->unit_address; 2215 struct device *dev = &adapter->vdev->dev; 2216 u64 *u64_crq = (u64 *)crq; 2217 int rc; 2218 2219 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 2220 (unsigned long int)cpu_to_be64(u64_crq[0]), 2221 (unsigned long int)cpu_to_be64(u64_crq[1])); 2222 2223 /* Make sure the hypervisor sees the complete request */ 2224 mb(); 2225 2226 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 2227 cpu_to_be64(u64_crq[0]), 2228 cpu_to_be64(u64_crq[1])); 2229 2230 if (rc) { 2231 if (rc == H_CLOSED) 2232 dev_warn(dev, "CRQ Queue closed\n"); 2233 dev_warn(dev, "Send error (rc=%d)\n", rc); 2234 } 2235 2236 return rc; 2237 } 2238 2239 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 2240 { 2241 union ibmvnic_crq crq; 2242 2243 memset(&crq, 0, sizeof(crq)); 2244 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 2245 crq.generic.cmd = IBMVNIC_CRQ_INIT; 2246 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 2247 2248 return ibmvnic_send_crq(adapter, &crq); 2249 } 2250 2251 static int send_version_xchg(struct ibmvnic_adapter *adapter) 2252 { 2253 union ibmvnic_crq crq; 2254 2255 memset(&crq, 0, sizeof(crq)); 2256 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 2257 crq.version_exchange.cmd = VERSION_EXCHANGE; 2258 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 2259 2260 return ibmvnic_send_crq(adapter, &crq); 2261 } 2262 2263 static void send_login(struct ibmvnic_adapter *adapter) 2264 { 2265 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 2266 struct ibmvnic_login_buffer *login_buffer; 2267 struct device *dev = &adapter->vdev->dev; 2268 dma_addr_t rsp_buffer_token; 2269 dma_addr_t buffer_token; 2270 size_t rsp_buffer_size; 2271 union ibmvnic_crq crq; 2272 size_t buffer_size; 2273 __be64 *tx_list_p; 2274 __be64 *rx_list_p; 2275 int i; 2276 2277 buffer_size = 2278 sizeof(struct ibmvnic_login_buffer) + 2279 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); 2280 2281 login_buffer = kmalloc(buffer_size, GFP_ATOMIC); 2282 if (!login_buffer) 2283 goto buf_alloc_failed; 2284 2285 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 2286 DMA_TO_DEVICE); 2287 if (dma_mapping_error(dev, buffer_token)) { 2288 dev_err(dev, "Couldn't map login buffer\n"); 2289 goto buf_map_failed; 2290 } 2291 2292 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 2293 sizeof(u64) * adapter->req_tx_queues + 2294 sizeof(u64) * adapter->req_rx_queues + 2295 sizeof(u64) * adapter->req_rx_queues + 2296 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 2297 2298 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 2299 if (!login_rsp_buffer) 2300 goto buf_rsp_alloc_failed; 2301 2302 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 2303 rsp_buffer_size, DMA_FROM_DEVICE); 2304 if (dma_mapping_error(dev, rsp_buffer_token)) { 2305 dev_err(dev, "Couldn't map login rsp buffer\n"); 2306 goto buf_rsp_map_failed; 2307 } 2308 2309 adapter->login_buf = login_buffer; 2310 adapter->login_buf_token = buffer_token; 2311 adapter->login_buf_sz = buffer_size; 2312 adapter->login_rsp_buf = login_rsp_buffer; 2313 adapter->login_rsp_buf_token = rsp_buffer_token; 2314 adapter->login_rsp_buf_sz = rsp_buffer_size; 2315 2316 login_buffer->len = cpu_to_be32(buffer_size); 2317 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 2318 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 2319 login_buffer->off_txcomp_subcrqs = 2320 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 2321 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 2322 login_buffer->off_rxcomp_subcrqs = 2323 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 2324 sizeof(u64) * adapter->req_tx_queues); 2325 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 2326 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 2327 2328 tx_list_p = (__be64 *)((char *)login_buffer + 2329 sizeof(struct ibmvnic_login_buffer)); 2330 rx_list_p = (__be64 *)((char *)login_buffer + 2331 sizeof(struct ibmvnic_login_buffer) + 2332 sizeof(u64) * adapter->req_tx_queues); 2333 2334 for (i = 0; i < adapter->req_tx_queues; i++) { 2335 if (adapter->tx_scrq[i]) { 2336 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 2337 crq_num); 2338 } 2339 } 2340 2341 for (i = 0; i < adapter->req_rx_queues; i++) { 2342 if (adapter->rx_scrq[i]) { 2343 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 2344 crq_num); 2345 } 2346 } 2347 2348 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 2349 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 2350 netdev_dbg(adapter->netdev, "%016lx\n", 2351 ((unsigned long int *)(adapter->login_buf))[i]); 2352 } 2353 2354 memset(&crq, 0, sizeof(crq)); 2355 crq.login.first = IBMVNIC_CRQ_CMD; 2356 crq.login.cmd = LOGIN; 2357 crq.login.ioba = cpu_to_be32(buffer_token); 2358 crq.login.len = cpu_to_be32(buffer_size); 2359 ibmvnic_send_crq(adapter, &crq); 2360 2361 return; 2362 2363 buf_rsp_map_failed: 2364 kfree(login_rsp_buffer); 2365 buf_rsp_alloc_failed: 2366 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 2367 buf_map_failed: 2368 kfree(login_buffer); 2369 buf_alloc_failed: 2370 return; 2371 } 2372 2373 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 2374 u32 len, u8 map_id) 2375 { 2376 union ibmvnic_crq crq; 2377 2378 memset(&crq, 0, sizeof(crq)); 2379 crq.request_map.first = IBMVNIC_CRQ_CMD; 2380 crq.request_map.cmd = REQUEST_MAP; 2381 crq.request_map.map_id = map_id; 2382 crq.request_map.ioba = cpu_to_be32(addr); 2383 crq.request_map.len = cpu_to_be32(len); 2384 ibmvnic_send_crq(adapter, &crq); 2385 } 2386 2387 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 2388 { 2389 union ibmvnic_crq crq; 2390 2391 memset(&crq, 0, sizeof(crq)); 2392 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 2393 crq.request_unmap.cmd = REQUEST_UNMAP; 2394 crq.request_unmap.map_id = map_id; 2395 ibmvnic_send_crq(adapter, &crq); 2396 } 2397 2398 static void send_map_query(struct ibmvnic_adapter *adapter) 2399 { 2400 union ibmvnic_crq crq; 2401 2402 memset(&crq, 0, sizeof(crq)); 2403 crq.query_map.first = IBMVNIC_CRQ_CMD; 2404 crq.query_map.cmd = QUERY_MAP; 2405 ibmvnic_send_crq(adapter, &crq); 2406 } 2407 2408 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 2409 static void send_cap_queries(struct ibmvnic_adapter *adapter) 2410 { 2411 union ibmvnic_crq crq; 2412 2413 atomic_set(&adapter->running_cap_crqs, 0); 2414 memset(&crq, 0, sizeof(crq)); 2415 crq.query_capability.first = IBMVNIC_CRQ_CMD; 2416 crq.query_capability.cmd = QUERY_CAPABILITY; 2417 2418 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 2419 atomic_inc(&adapter->running_cap_crqs); 2420 ibmvnic_send_crq(adapter, &crq); 2421 2422 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 2423 atomic_inc(&adapter->running_cap_crqs); 2424 ibmvnic_send_crq(adapter, &crq); 2425 2426 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 2427 atomic_inc(&adapter->running_cap_crqs); 2428 ibmvnic_send_crq(adapter, &crq); 2429 2430 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 2431 atomic_inc(&adapter->running_cap_crqs); 2432 ibmvnic_send_crq(adapter, &crq); 2433 2434 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 2435 atomic_inc(&adapter->running_cap_crqs); 2436 ibmvnic_send_crq(adapter, &crq); 2437 2438 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 2439 atomic_inc(&adapter->running_cap_crqs); 2440 ibmvnic_send_crq(adapter, &crq); 2441 2442 crq.query_capability.capability = 2443 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 2444 atomic_inc(&adapter->running_cap_crqs); 2445 ibmvnic_send_crq(adapter, &crq); 2446 2447 crq.query_capability.capability = 2448 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 2449 atomic_inc(&adapter->running_cap_crqs); 2450 ibmvnic_send_crq(adapter, &crq); 2451 2452 crq.query_capability.capability = 2453 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 2454 atomic_inc(&adapter->running_cap_crqs); 2455 ibmvnic_send_crq(adapter, &crq); 2456 2457 crq.query_capability.capability = 2458 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 2459 atomic_inc(&adapter->running_cap_crqs); 2460 ibmvnic_send_crq(adapter, &crq); 2461 2462 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 2463 atomic_inc(&adapter->running_cap_crqs); 2464 ibmvnic_send_crq(adapter, &crq); 2465 2466 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 2467 atomic_inc(&adapter->running_cap_crqs); 2468 ibmvnic_send_crq(adapter, &crq); 2469 2470 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 2471 atomic_inc(&adapter->running_cap_crqs); 2472 ibmvnic_send_crq(adapter, &crq); 2473 2474 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 2475 atomic_inc(&adapter->running_cap_crqs); 2476 ibmvnic_send_crq(adapter, &crq); 2477 2478 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 2479 atomic_inc(&adapter->running_cap_crqs); 2480 ibmvnic_send_crq(adapter, &crq); 2481 2482 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 2483 atomic_inc(&adapter->running_cap_crqs); 2484 ibmvnic_send_crq(adapter, &crq); 2485 2486 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 2487 atomic_inc(&adapter->running_cap_crqs); 2488 ibmvnic_send_crq(adapter, &crq); 2489 2490 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 2491 atomic_inc(&adapter->running_cap_crqs); 2492 ibmvnic_send_crq(adapter, &crq); 2493 2494 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 2495 atomic_inc(&adapter->running_cap_crqs); 2496 ibmvnic_send_crq(adapter, &crq); 2497 2498 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 2499 atomic_inc(&adapter->running_cap_crqs); 2500 ibmvnic_send_crq(adapter, &crq); 2501 2502 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 2503 atomic_inc(&adapter->running_cap_crqs); 2504 ibmvnic_send_crq(adapter, &crq); 2505 2506 crq.query_capability.capability = 2507 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 2508 atomic_inc(&adapter->running_cap_crqs); 2509 ibmvnic_send_crq(adapter, &crq); 2510 2511 crq.query_capability.capability = 2512 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 2513 atomic_inc(&adapter->running_cap_crqs); 2514 ibmvnic_send_crq(adapter, &crq); 2515 2516 crq.query_capability.capability = 2517 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 2518 atomic_inc(&adapter->running_cap_crqs); 2519 ibmvnic_send_crq(adapter, &crq); 2520 2521 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 2522 atomic_inc(&adapter->running_cap_crqs); 2523 ibmvnic_send_crq(adapter, &crq); 2524 } 2525 2526 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 2527 { 2528 struct device *dev = &adapter->vdev->dev; 2529 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 2530 union ibmvnic_crq crq; 2531 int i; 2532 2533 dma_unmap_single(dev, adapter->ip_offload_tok, 2534 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 2535 2536 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 2537 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 2538 netdev_dbg(adapter->netdev, "%016lx\n", 2539 ((unsigned long int *)(buf))[i]); 2540 2541 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 2542 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 2543 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 2544 buf->tcp_ipv4_chksum); 2545 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 2546 buf->tcp_ipv6_chksum); 2547 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 2548 buf->udp_ipv4_chksum); 2549 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 2550 buf->udp_ipv6_chksum); 2551 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 2552 buf->large_tx_ipv4); 2553 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 2554 buf->large_tx_ipv6); 2555 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 2556 buf->large_rx_ipv4); 2557 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 2558 buf->large_rx_ipv6); 2559 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 2560 buf->max_ipv4_header_size); 2561 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 2562 buf->max_ipv6_header_size); 2563 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 2564 buf->max_tcp_header_size); 2565 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 2566 buf->max_udp_header_size); 2567 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 2568 buf->max_large_tx_size); 2569 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 2570 buf->max_large_rx_size); 2571 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 2572 buf->ipv6_extension_header); 2573 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 2574 buf->tcp_pseudosum_req); 2575 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 2576 buf->num_ipv6_ext_headers); 2577 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 2578 buf->off_ipv6_ext_headers); 2579 2580 adapter->ip_offload_ctrl_tok = 2581 dma_map_single(dev, &adapter->ip_offload_ctrl, 2582 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 2583 2584 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 2585 dev_err(dev, "Couldn't map ip offload control buffer\n"); 2586 return; 2587 } 2588 2589 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 2590 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 2591 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 2592 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 2593 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 2594 2595 /* large_tx/rx disabled for now, additional features needed */ 2596 adapter->ip_offload_ctrl.large_tx_ipv4 = 0; 2597 adapter->ip_offload_ctrl.large_tx_ipv6 = 0; 2598 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 2599 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 2600 2601 adapter->netdev->features = NETIF_F_GSO; 2602 2603 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 2604 adapter->netdev->features |= NETIF_F_IP_CSUM; 2605 2606 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 2607 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 2608 2609 if ((adapter->netdev->features & 2610 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 2611 adapter->netdev->features |= NETIF_F_RXCSUM; 2612 2613 memset(&crq, 0, sizeof(crq)); 2614 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 2615 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 2616 crq.control_ip_offload.len = 2617 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 2618 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 2619 ibmvnic_send_crq(adapter, &crq); 2620 } 2621 2622 static void handle_error_info_rsp(union ibmvnic_crq *crq, 2623 struct ibmvnic_adapter *adapter) 2624 { 2625 struct device *dev = &adapter->vdev->dev; 2626 struct ibmvnic_error_buff *error_buff, *tmp; 2627 unsigned long flags; 2628 bool found = false; 2629 int i; 2630 2631 if (!crq->request_error_rsp.rc.code) { 2632 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 2633 crq->request_error_rsp.rc.code); 2634 return; 2635 } 2636 2637 spin_lock_irqsave(&adapter->error_list_lock, flags); 2638 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 2639 if (error_buff->error_id == crq->request_error_rsp.error_id) { 2640 found = true; 2641 list_del(&error_buff->list); 2642 break; 2643 } 2644 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2645 2646 if (!found) { 2647 dev_err(dev, "Couldn't find error id %x\n", 2648 be32_to_cpu(crq->request_error_rsp.error_id)); 2649 return; 2650 } 2651 2652 dev_err(dev, "Detailed info for error id %x:", 2653 be32_to_cpu(crq->request_error_rsp.error_id)); 2654 2655 for (i = 0; i < error_buff->len; i++) { 2656 pr_cont("%02x", (int)error_buff->buff[i]); 2657 if (i % 8 == 7) 2658 pr_cont(" "); 2659 } 2660 pr_cont("\n"); 2661 2662 dma_unmap_single(dev, error_buff->dma, error_buff->len, 2663 DMA_FROM_DEVICE); 2664 kfree(error_buff->buff); 2665 kfree(error_buff); 2666 } 2667 2668 static void request_error_information(struct ibmvnic_adapter *adapter, 2669 union ibmvnic_crq *err_crq) 2670 { 2671 struct device *dev = &adapter->vdev->dev; 2672 struct net_device *netdev = adapter->netdev; 2673 struct ibmvnic_error_buff *error_buff; 2674 unsigned long timeout = msecs_to_jiffies(30000); 2675 union ibmvnic_crq crq; 2676 unsigned long flags; 2677 int rc, detail_len; 2678 2679 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 2680 if (!error_buff) 2681 return; 2682 2683 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz); 2684 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 2685 if (!error_buff->buff) { 2686 kfree(error_buff); 2687 return; 2688 } 2689 2690 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 2691 DMA_FROM_DEVICE); 2692 if (dma_mapping_error(dev, error_buff->dma)) { 2693 netdev_err(netdev, "Couldn't map error buffer\n"); 2694 kfree(error_buff->buff); 2695 kfree(error_buff); 2696 return; 2697 } 2698 2699 error_buff->len = detail_len; 2700 error_buff->error_id = err_crq->error_indication.error_id; 2701 2702 spin_lock_irqsave(&adapter->error_list_lock, flags); 2703 list_add_tail(&error_buff->list, &adapter->errors); 2704 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2705 2706 memset(&crq, 0, sizeof(crq)); 2707 crq.request_error_info.first = IBMVNIC_CRQ_CMD; 2708 crq.request_error_info.cmd = REQUEST_ERROR_INFO; 2709 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 2710 crq.request_error_info.len = cpu_to_be32(detail_len); 2711 crq.request_error_info.error_id = err_crq->error_indication.error_id; 2712 2713 rc = ibmvnic_send_crq(adapter, &crq); 2714 if (rc) { 2715 netdev_err(netdev, "failed to request error information\n"); 2716 goto err_info_fail; 2717 } 2718 2719 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2720 netdev_err(netdev, "timeout waiting for error information\n"); 2721 goto err_info_fail; 2722 } 2723 2724 return; 2725 2726 err_info_fail: 2727 spin_lock_irqsave(&adapter->error_list_lock, flags); 2728 list_del(&error_buff->list); 2729 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2730 2731 kfree(error_buff->buff); 2732 kfree(error_buff); 2733 } 2734 2735 static void handle_error_indication(union ibmvnic_crq *crq, 2736 struct ibmvnic_adapter *adapter) 2737 { 2738 struct device *dev = &adapter->vdev->dev; 2739 2740 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 2741 crq->error_indication.flags 2742 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 2743 be32_to_cpu(crq->error_indication.error_id), 2744 be16_to_cpu(crq->error_indication.error_cause)); 2745 2746 if (be32_to_cpu(crq->error_indication.error_id)) 2747 request_error_information(adapter, crq); 2748 2749 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 2750 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 2751 } 2752 2753 static void handle_change_mac_rsp(union ibmvnic_crq *crq, 2754 struct ibmvnic_adapter *adapter) 2755 { 2756 struct net_device *netdev = adapter->netdev; 2757 struct device *dev = &adapter->vdev->dev; 2758 long rc; 2759 2760 rc = crq->change_mac_addr_rsp.rc.code; 2761 if (rc) { 2762 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 2763 return; 2764 } 2765 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 2766 ETH_ALEN); 2767 } 2768 2769 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 2770 struct ibmvnic_adapter *adapter) 2771 { 2772 struct device *dev = &adapter->vdev->dev; 2773 u64 *req_value; 2774 char *name; 2775 2776 atomic_dec(&adapter->running_cap_crqs); 2777 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 2778 case REQ_TX_QUEUES: 2779 req_value = &adapter->req_tx_queues; 2780 name = "tx"; 2781 break; 2782 case REQ_RX_QUEUES: 2783 req_value = &adapter->req_rx_queues; 2784 name = "rx"; 2785 break; 2786 case REQ_RX_ADD_QUEUES: 2787 req_value = &adapter->req_rx_add_queues; 2788 name = "rx_add"; 2789 break; 2790 case REQ_TX_ENTRIES_PER_SUBCRQ: 2791 req_value = &adapter->req_tx_entries_per_subcrq; 2792 name = "tx_entries_per_subcrq"; 2793 break; 2794 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 2795 req_value = &adapter->req_rx_add_entries_per_subcrq; 2796 name = "rx_add_entries_per_subcrq"; 2797 break; 2798 case REQ_MTU: 2799 req_value = &adapter->req_mtu; 2800 name = "mtu"; 2801 break; 2802 case PROMISC_REQUESTED: 2803 req_value = &adapter->promisc; 2804 name = "promisc"; 2805 break; 2806 default: 2807 dev_err(dev, "Got invalid cap request rsp %d\n", 2808 crq->request_capability.capability); 2809 return; 2810 } 2811 2812 switch (crq->request_capability_rsp.rc.code) { 2813 case SUCCESS: 2814 break; 2815 case PARTIALSUCCESS: 2816 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 2817 *req_value, 2818 (long int)be64_to_cpu(crq->request_capability_rsp. 2819 number), name); 2820 release_sub_crqs(adapter); 2821 *req_value = be64_to_cpu(crq->request_capability_rsp.number); 2822 ibmvnic_send_req_caps(adapter, 1); 2823 return; 2824 default: 2825 dev_err(dev, "Error %d in request cap rsp\n", 2826 crq->request_capability_rsp.rc.code); 2827 return; 2828 } 2829 2830 /* Done receiving requested capabilities, query IP offload support */ 2831 if (atomic_read(&adapter->running_cap_crqs) == 0) { 2832 union ibmvnic_crq newcrq; 2833 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 2834 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 2835 &adapter->ip_offload_buf; 2836 2837 adapter->wait_capability = false; 2838 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 2839 buf_sz, 2840 DMA_FROM_DEVICE); 2841 2842 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 2843 if (!firmware_has_feature(FW_FEATURE_CMO)) 2844 dev_err(dev, "Couldn't map offload buffer\n"); 2845 return; 2846 } 2847 2848 memset(&newcrq, 0, sizeof(newcrq)); 2849 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 2850 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 2851 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 2852 newcrq.query_ip_offload.ioba = 2853 cpu_to_be32(adapter->ip_offload_tok); 2854 2855 ibmvnic_send_crq(adapter, &newcrq); 2856 } 2857 } 2858 2859 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 2860 struct ibmvnic_adapter *adapter) 2861 { 2862 struct device *dev = &adapter->vdev->dev; 2863 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 2864 struct ibmvnic_login_buffer *login = adapter->login_buf; 2865 int i; 2866 2867 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 2868 DMA_BIDIRECTIONAL); 2869 dma_unmap_single(dev, adapter->login_rsp_buf_token, 2870 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 2871 2872 /* If the number of queues requested can't be allocated by the 2873 * server, the login response will return with code 1. We will need 2874 * to resend the login buffer with fewer queues requested. 2875 */ 2876 if (login_rsp_crq->generic.rc.code) { 2877 adapter->renegotiate = true; 2878 complete(&adapter->init_done); 2879 return 0; 2880 } 2881 2882 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 2883 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 2884 netdev_dbg(adapter->netdev, "%016lx\n", 2885 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 2886 } 2887 2888 /* Sanity checks */ 2889 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 2890 (be32_to_cpu(login->num_rxcomp_subcrqs) * 2891 adapter->req_rx_add_queues != 2892 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 2893 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 2894 ibmvnic_remove(adapter->vdev); 2895 return -EIO; 2896 } 2897 complete(&adapter->init_done); 2898 2899 return 0; 2900 } 2901 2902 static void handle_request_map_rsp(union ibmvnic_crq *crq, 2903 struct ibmvnic_adapter *adapter) 2904 { 2905 struct device *dev = &adapter->vdev->dev; 2906 u8 map_id = crq->request_map_rsp.map_id; 2907 int tx_subcrqs; 2908 int rx_subcrqs; 2909 long rc; 2910 int i; 2911 2912 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 2913 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 2914 2915 rc = crq->request_map_rsp.rc.code; 2916 if (rc) { 2917 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc); 2918 adapter->map_id--; 2919 /* need to find and zero tx/rx_pool map_id */ 2920 for (i = 0; i < tx_subcrqs; i++) { 2921 if (adapter->tx_pool[i].long_term_buff.map_id == map_id) 2922 adapter->tx_pool[i].long_term_buff.map_id = 0; 2923 } 2924 for (i = 0; i < rx_subcrqs; i++) { 2925 if (adapter->rx_pool[i].long_term_buff.map_id == map_id) 2926 adapter->rx_pool[i].long_term_buff.map_id = 0; 2927 } 2928 } 2929 complete(&adapter->fw_done); 2930 } 2931 2932 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 2933 struct ibmvnic_adapter *adapter) 2934 { 2935 struct device *dev = &adapter->vdev->dev; 2936 long rc; 2937 2938 rc = crq->request_unmap_rsp.rc.code; 2939 if (rc) 2940 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 2941 } 2942 2943 static void handle_query_map_rsp(union ibmvnic_crq *crq, 2944 struct ibmvnic_adapter *adapter) 2945 { 2946 struct net_device *netdev = adapter->netdev; 2947 struct device *dev = &adapter->vdev->dev; 2948 long rc; 2949 2950 rc = crq->query_map_rsp.rc.code; 2951 if (rc) { 2952 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 2953 return; 2954 } 2955 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 2956 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 2957 crq->query_map_rsp.free_pages); 2958 } 2959 2960 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 2961 struct ibmvnic_adapter *adapter) 2962 { 2963 struct net_device *netdev = adapter->netdev; 2964 struct device *dev = &adapter->vdev->dev; 2965 long rc; 2966 2967 atomic_dec(&adapter->running_cap_crqs); 2968 netdev_dbg(netdev, "Outstanding queries: %d\n", 2969 atomic_read(&adapter->running_cap_crqs)); 2970 rc = crq->query_capability.rc.code; 2971 if (rc) { 2972 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 2973 goto out; 2974 } 2975 2976 switch (be16_to_cpu(crq->query_capability.capability)) { 2977 case MIN_TX_QUEUES: 2978 adapter->min_tx_queues = 2979 be64_to_cpu(crq->query_capability.number); 2980 netdev_dbg(netdev, "min_tx_queues = %lld\n", 2981 adapter->min_tx_queues); 2982 break; 2983 case MIN_RX_QUEUES: 2984 adapter->min_rx_queues = 2985 be64_to_cpu(crq->query_capability.number); 2986 netdev_dbg(netdev, "min_rx_queues = %lld\n", 2987 adapter->min_rx_queues); 2988 break; 2989 case MIN_RX_ADD_QUEUES: 2990 adapter->min_rx_add_queues = 2991 be64_to_cpu(crq->query_capability.number); 2992 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 2993 adapter->min_rx_add_queues); 2994 break; 2995 case MAX_TX_QUEUES: 2996 adapter->max_tx_queues = 2997 be64_to_cpu(crq->query_capability.number); 2998 netdev_dbg(netdev, "max_tx_queues = %lld\n", 2999 adapter->max_tx_queues); 3000 break; 3001 case MAX_RX_QUEUES: 3002 adapter->max_rx_queues = 3003 be64_to_cpu(crq->query_capability.number); 3004 netdev_dbg(netdev, "max_rx_queues = %lld\n", 3005 adapter->max_rx_queues); 3006 break; 3007 case MAX_RX_ADD_QUEUES: 3008 adapter->max_rx_add_queues = 3009 be64_to_cpu(crq->query_capability.number); 3010 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 3011 adapter->max_rx_add_queues); 3012 break; 3013 case MIN_TX_ENTRIES_PER_SUBCRQ: 3014 adapter->min_tx_entries_per_subcrq = 3015 be64_to_cpu(crq->query_capability.number); 3016 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 3017 adapter->min_tx_entries_per_subcrq); 3018 break; 3019 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 3020 adapter->min_rx_add_entries_per_subcrq = 3021 be64_to_cpu(crq->query_capability.number); 3022 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 3023 adapter->min_rx_add_entries_per_subcrq); 3024 break; 3025 case MAX_TX_ENTRIES_PER_SUBCRQ: 3026 adapter->max_tx_entries_per_subcrq = 3027 be64_to_cpu(crq->query_capability.number); 3028 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 3029 adapter->max_tx_entries_per_subcrq); 3030 break; 3031 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 3032 adapter->max_rx_add_entries_per_subcrq = 3033 be64_to_cpu(crq->query_capability.number); 3034 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 3035 adapter->max_rx_add_entries_per_subcrq); 3036 break; 3037 case TCP_IP_OFFLOAD: 3038 adapter->tcp_ip_offload = 3039 be64_to_cpu(crq->query_capability.number); 3040 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 3041 adapter->tcp_ip_offload); 3042 break; 3043 case PROMISC_SUPPORTED: 3044 adapter->promisc_supported = 3045 be64_to_cpu(crq->query_capability.number); 3046 netdev_dbg(netdev, "promisc_supported = %lld\n", 3047 adapter->promisc_supported); 3048 break; 3049 case MIN_MTU: 3050 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 3051 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3052 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 3053 break; 3054 case MAX_MTU: 3055 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 3056 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3057 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 3058 break; 3059 case MAX_MULTICAST_FILTERS: 3060 adapter->max_multicast_filters = 3061 be64_to_cpu(crq->query_capability.number); 3062 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 3063 adapter->max_multicast_filters); 3064 break; 3065 case VLAN_HEADER_INSERTION: 3066 adapter->vlan_header_insertion = 3067 be64_to_cpu(crq->query_capability.number); 3068 if (adapter->vlan_header_insertion) 3069 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 3070 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 3071 adapter->vlan_header_insertion); 3072 break; 3073 case RX_VLAN_HEADER_INSERTION: 3074 adapter->rx_vlan_header_insertion = 3075 be64_to_cpu(crq->query_capability.number); 3076 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 3077 adapter->rx_vlan_header_insertion); 3078 break; 3079 case MAX_TX_SG_ENTRIES: 3080 adapter->max_tx_sg_entries = 3081 be64_to_cpu(crq->query_capability.number); 3082 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 3083 adapter->max_tx_sg_entries); 3084 break; 3085 case RX_SG_SUPPORTED: 3086 adapter->rx_sg_supported = 3087 be64_to_cpu(crq->query_capability.number); 3088 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 3089 adapter->rx_sg_supported); 3090 break; 3091 case OPT_TX_COMP_SUB_QUEUES: 3092 adapter->opt_tx_comp_sub_queues = 3093 be64_to_cpu(crq->query_capability.number); 3094 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 3095 adapter->opt_tx_comp_sub_queues); 3096 break; 3097 case OPT_RX_COMP_QUEUES: 3098 adapter->opt_rx_comp_queues = 3099 be64_to_cpu(crq->query_capability.number); 3100 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 3101 adapter->opt_rx_comp_queues); 3102 break; 3103 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 3104 adapter->opt_rx_bufadd_q_per_rx_comp_q = 3105 be64_to_cpu(crq->query_capability.number); 3106 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 3107 adapter->opt_rx_bufadd_q_per_rx_comp_q); 3108 break; 3109 case OPT_TX_ENTRIES_PER_SUBCRQ: 3110 adapter->opt_tx_entries_per_subcrq = 3111 be64_to_cpu(crq->query_capability.number); 3112 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 3113 adapter->opt_tx_entries_per_subcrq); 3114 break; 3115 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 3116 adapter->opt_rxba_entries_per_subcrq = 3117 be64_to_cpu(crq->query_capability.number); 3118 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 3119 adapter->opt_rxba_entries_per_subcrq); 3120 break; 3121 case TX_RX_DESC_REQ: 3122 adapter->tx_rx_desc_req = crq->query_capability.number; 3123 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 3124 adapter->tx_rx_desc_req); 3125 break; 3126 3127 default: 3128 netdev_err(netdev, "Got invalid cap rsp %d\n", 3129 crq->query_capability.capability); 3130 } 3131 3132 out: 3133 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3134 adapter->wait_capability = false; 3135 ibmvnic_send_req_caps(adapter, 0); 3136 } 3137 } 3138 3139 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 3140 struct ibmvnic_adapter *adapter) 3141 { 3142 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 3143 struct net_device *netdev = adapter->netdev; 3144 struct device *dev = &adapter->vdev->dev; 3145 u64 *u64_crq = (u64 *)crq; 3146 long rc; 3147 3148 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 3149 (unsigned long int)cpu_to_be64(u64_crq[0]), 3150 (unsigned long int)cpu_to_be64(u64_crq[1])); 3151 switch (gen_crq->first) { 3152 case IBMVNIC_CRQ_INIT_RSP: 3153 switch (gen_crq->cmd) { 3154 case IBMVNIC_CRQ_INIT: 3155 dev_info(dev, "Partner initialized\n"); 3156 break; 3157 case IBMVNIC_CRQ_INIT_COMPLETE: 3158 dev_info(dev, "Partner initialization complete\n"); 3159 send_version_xchg(adapter); 3160 break; 3161 default: 3162 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 3163 } 3164 return; 3165 case IBMVNIC_CRQ_XPORT_EVENT: 3166 netif_carrier_off(netdev); 3167 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 3168 dev_info(dev, "Migrated, re-enabling adapter\n"); 3169 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 3170 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 3171 dev_info(dev, "Backing device failover detected\n"); 3172 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 3173 } else { 3174 /* The adapter lost the connection */ 3175 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 3176 gen_crq->cmd); 3177 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3178 } 3179 return; 3180 case IBMVNIC_CRQ_CMD_RSP: 3181 break; 3182 default: 3183 dev_err(dev, "Got an invalid msg type 0x%02x\n", 3184 gen_crq->first); 3185 return; 3186 } 3187 3188 switch (gen_crq->cmd) { 3189 case VERSION_EXCHANGE_RSP: 3190 rc = crq->version_exchange_rsp.rc.code; 3191 if (rc) { 3192 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 3193 break; 3194 } 3195 dev_info(dev, "Partner protocol version is %d\n", 3196 crq->version_exchange_rsp.version); 3197 if (be16_to_cpu(crq->version_exchange_rsp.version) < 3198 ibmvnic_version) 3199 ibmvnic_version = 3200 be16_to_cpu(crq->version_exchange_rsp.version); 3201 send_cap_queries(adapter); 3202 break; 3203 case QUERY_CAPABILITY_RSP: 3204 handle_query_cap_rsp(crq, adapter); 3205 break; 3206 case QUERY_MAP_RSP: 3207 handle_query_map_rsp(crq, adapter); 3208 break; 3209 case REQUEST_MAP_RSP: 3210 handle_request_map_rsp(crq, adapter); 3211 break; 3212 case REQUEST_UNMAP_RSP: 3213 handle_request_unmap_rsp(crq, adapter); 3214 break; 3215 case REQUEST_CAPABILITY_RSP: 3216 handle_request_cap_rsp(crq, adapter); 3217 break; 3218 case LOGIN_RSP: 3219 netdev_dbg(netdev, "Got Login Response\n"); 3220 handle_login_rsp(crq, adapter); 3221 break; 3222 case LOGICAL_LINK_STATE_RSP: 3223 netdev_dbg(netdev, 3224 "Got Logical Link State Response, state: %d rc: %d\n", 3225 crq->logical_link_state_rsp.link_state, 3226 crq->logical_link_state_rsp.rc.code); 3227 adapter->logical_link_state = 3228 crq->logical_link_state_rsp.link_state; 3229 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 3230 complete(&adapter->init_done); 3231 break; 3232 case LINK_STATE_INDICATION: 3233 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 3234 adapter->phys_link_state = 3235 crq->link_state_indication.phys_link_state; 3236 adapter->logical_link_state = 3237 crq->link_state_indication.logical_link_state; 3238 break; 3239 case CHANGE_MAC_ADDR_RSP: 3240 netdev_dbg(netdev, "Got MAC address change Response\n"); 3241 handle_change_mac_rsp(crq, adapter); 3242 break; 3243 case ERROR_INDICATION: 3244 netdev_dbg(netdev, "Got Error Indication\n"); 3245 handle_error_indication(crq, adapter); 3246 break; 3247 case REQUEST_ERROR_RSP: 3248 netdev_dbg(netdev, "Got Error Detail Response\n"); 3249 handle_error_info_rsp(crq, adapter); 3250 break; 3251 case REQUEST_STATISTICS_RSP: 3252 netdev_dbg(netdev, "Got Statistics Response\n"); 3253 complete(&adapter->stats_done); 3254 break; 3255 case QUERY_IP_OFFLOAD_RSP: 3256 netdev_dbg(netdev, "Got Query IP offload Response\n"); 3257 handle_query_ip_offload_rsp(adapter); 3258 break; 3259 case MULTICAST_CTRL_RSP: 3260 netdev_dbg(netdev, "Got multicast control Response\n"); 3261 break; 3262 case CONTROL_IP_OFFLOAD_RSP: 3263 netdev_dbg(netdev, "Got Control IP offload Response\n"); 3264 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 3265 sizeof(adapter->ip_offload_ctrl), 3266 DMA_TO_DEVICE); 3267 complete(&adapter->init_done); 3268 break; 3269 case COLLECT_FW_TRACE_RSP: 3270 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 3271 complete(&adapter->fw_done); 3272 break; 3273 default: 3274 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 3275 gen_crq->cmd); 3276 } 3277 } 3278 3279 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 3280 { 3281 struct ibmvnic_adapter *adapter = instance; 3282 3283 tasklet_schedule(&adapter->tasklet); 3284 return IRQ_HANDLED; 3285 } 3286 3287 static void ibmvnic_tasklet(void *data) 3288 { 3289 struct ibmvnic_adapter *adapter = data; 3290 struct ibmvnic_crq_queue *queue = &adapter->crq; 3291 union ibmvnic_crq *crq; 3292 unsigned long flags; 3293 bool done = false; 3294 3295 spin_lock_irqsave(&queue->lock, flags); 3296 while (!done) { 3297 /* Pull all the valid messages off the CRQ */ 3298 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 3299 ibmvnic_handle_crq(crq, adapter); 3300 crq->generic.first = 0; 3301 } 3302 3303 /* remain in tasklet until all 3304 * capabilities responses are received 3305 */ 3306 if (!adapter->wait_capability) 3307 done = true; 3308 } 3309 /* if capabilities CRQ's were sent in this tasklet, the following 3310 * tasklet must wait until all responses are received 3311 */ 3312 if (atomic_read(&adapter->running_cap_crqs) != 0) 3313 adapter->wait_capability = true; 3314 spin_unlock_irqrestore(&queue->lock, flags); 3315 } 3316 3317 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 3318 { 3319 struct vio_dev *vdev = adapter->vdev; 3320 int rc; 3321 3322 do { 3323 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 3324 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3325 3326 if (rc) 3327 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 3328 3329 return rc; 3330 } 3331 3332 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 3333 { 3334 struct ibmvnic_crq_queue *crq = &adapter->crq; 3335 struct device *dev = &adapter->vdev->dev; 3336 struct vio_dev *vdev = adapter->vdev; 3337 int rc; 3338 3339 /* Close the CRQ */ 3340 do { 3341 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3342 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3343 3344 /* Clean out the queue */ 3345 memset(crq->msgs, 0, PAGE_SIZE); 3346 crq->cur = 0; 3347 3348 /* And re-open it again */ 3349 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3350 crq->msg_token, PAGE_SIZE); 3351 3352 if (rc == H_CLOSED) 3353 /* Adapter is good, but other end is not ready */ 3354 dev_warn(dev, "Partner adapter not ready\n"); 3355 else if (rc != 0) 3356 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 3357 3358 return rc; 3359 } 3360 3361 static void release_crq_queue(struct ibmvnic_adapter *adapter) 3362 { 3363 struct ibmvnic_crq_queue *crq = &adapter->crq; 3364 struct vio_dev *vdev = adapter->vdev; 3365 long rc; 3366 3367 if (!crq->msgs) 3368 return; 3369 3370 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 3371 free_irq(vdev->irq, adapter); 3372 tasklet_kill(&adapter->tasklet); 3373 do { 3374 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3375 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3376 3377 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 3378 DMA_BIDIRECTIONAL); 3379 free_page((unsigned long)crq->msgs); 3380 crq->msgs = NULL; 3381 } 3382 3383 static int init_crq_queue(struct ibmvnic_adapter *adapter) 3384 { 3385 struct ibmvnic_crq_queue *crq = &adapter->crq; 3386 struct device *dev = &adapter->vdev->dev; 3387 struct vio_dev *vdev = adapter->vdev; 3388 int rc, retrc = -ENOMEM; 3389 3390 if (crq->msgs) 3391 return 0; 3392 3393 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 3394 /* Should we allocate more than one page? */ 3395 3396 if (!crq->msgs) 3397 return -ENOMEM; 3398 3399 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3400 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 3401 DMA_BIDIRECTIONAL); 3402 if (dma_mapping_error(dev, crq->msg_token)) 3403 goto map_failed; 3404 3405 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3406 crq->msg_token, PAGE_SIZE); 3407 3408 if (rc == H_RESOURCE) 3409 /* maybe kexecing and resource is busy. try a reset */ 3410 rc = ibmvnic_reset_crq(adapter); 3411 retrc = rc; 3412 3413 if (rc == H_CLOSED) { 3414 dev_warn(dev, "Partner adapter not ready\n"); 3415 } else if (rc) { 3416 dev_warn(dev, "Error %d opening adapter\n", rc); 3417 goto reg_crq_failed; 3418 } 3419 3420 retrc = 0; 3421 3422 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 3423 (unsigned long)adapter); 3424 3425 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 3426 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 3427 adapter); 3428 if (rc) { 3429 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 3430 vdev->irq, rc); 3431 goto req_irq_failed; 3432 } 3433 3434 rc = vio_enable_interrupts(vdev); 3435 if (rc) { 3436 dev_err(dev, "Error %d enabling interrupts\n", rc); 3437 goto req_irq_failed; 3438 } 3439 3440 crq->cur = 0; 3441 spin_lock_init(&crq->lock); 3442 3443 return retrc; 3444 3445 req_irq_failed: 3446 tasklet_kill(&adapter->tasklet); 3447 do { 3448 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3449 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3450 reg_crq_failed: 3451 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3452 map_failed: 3453 free_page((unsigned long)crq->msgs); 3454 crq->msgs = NULL; 3455 return retrc; 3456 } 3457 3458 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 3459 { 3460 struct device *dev = &adapter->vdev->dev; 3461 unsigned long timeout = msecs_to_jiffies(30000); 3462 int rc; 3463 3464 rc = init_crq_queue(adapter); 3465 if (rc) { 3466 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 3467 return rc; 3468 } 3469 3470 init_completion(&adapter->init_done); 3471 ibmvnic_send_crq_init(adapter); 3472 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3473 dev_err(dev, "Initialization sequence timed out\n"); 3474 release_crq_queue(adapter); 3475 return -1; 3476 } 3477 3478 rc = init_sub_crqs(adapter); 3479 if (rc) { 3480 dev_err(dev, "Initialization of sub crqs failed\n"); 3481 release_crq_queue(adapter); 3482 } 3483 3484 return rc; 3485 } 3486 3487 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 3488 { 3489 struct ibmvnic_adapter *adapter; 3490 struct net_device *netdev; 3491 unsigned char *mac_addr_p; 3492 int rc; 3493 3494 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 3495 dev->unit_address); 3496 3497 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 3498 VETH_MAC_ADDR, NULL); 3499 if (!mac_addr_p) { 3500 dev_err(&dev->dev, 3501 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 3502 __FILE__, __LINE__); 3503 return 0; 3504 } 3505 3506 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 3507 IBMVNIC_MAX_TX_QUEUES); 3508 if (!netdev) 3509 return -ENOMEM; 3510 3511 adapter = netdev_priv(netdev); 3512 adapter->state = VNIC_PROBING; 3513 dev_set_drvdata(&dev->dev, netdev); 3514 adapter->vdev = dev; 3515 adapter->netdev = netdev; 3516 3517 ether_addr_copy(adapter->mac_addr, mac_addr_p); 3518 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 3519 netdev->irq = dev->irq; 3520 netdev->netdev_ops = &ibmvnic_netdev_ops; 3521 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 3522 SET_NETDEV_DEV(netdev, &dev->dev); 3523 3524 spin_lock_init(&adapter->stats_lock); 3525 3526 INIT_LIST_HEAD(&adapter->errors); 3527 spin_lock_init(&adapter->error_list_lock); 3528 3529 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 3530 INIT_LIST_HEAD(&adapter->rwi_list); 3531 mutex_init(&adapter->reset_lock); 3532 mutex_init(&adapter->rwi_lock); 3533 adapter->resetting = false; 3534 3535 rc = ibmvnic_init(adapter); 3536 if (rc) { 3537 free_netdev(netdev); 3538 return rc; 3539 } 3540 3541 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3542 3543 rc = register_netdev(netdev); 3544 if (rc) { 3545 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 3546 free_netdev(netdev); 3547 return rc; 3548 } 3549 dev_info(&dev->dev, "ibmvnic registered\n"); 3550 3551 adapter->state = VNIC_PROBED; 3552 return 0; 3553 } 3554 3555 static int ibmvnic_remove(struct vio_dev *dev) 3556 { 3557 struct net_device *netdev = dev_get_drvdata(&dev->dev); 3558 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3559 3560 adapter->state = VNIC_REMOVING; 3561 unregister_netdev(netdev); 3562 mutex_lock(&adapter->reset_lock); 3563 3564 release_resources(adapter); 3565 release_sub_crqs(adapter); 3566 release_crq_queue(adapter); 3567 3568 adapter->state = VNIC_REMOVED; 3569 3570 mutex_unlock(&adapter->reset_lock); 3571 free_netdev(netdev); 3572 dev_set_drvdata(&dev->dev, NULL); 3573 3574 return 0; 3575 } 3576 3577 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 3578 { 3579 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 3580 struct ibmvnic_adapter *adapter; 3581 struct iommu_table *tbl; 3582 unsigned long ret = 0; 3583 int i; 3584 3585 tbl = get_iommu_table_base(&vdev->dev); 3586 3587 /* netdev inits at probe time along with the structures we need below*/ 3588 if (!netdev) 3589 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 3590 3591 adapter = netdev_priv(netdev); 3592 3593 ret += PAGE_SIZE; /* the crq message queue */ 3594 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 3595 3596 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 3597 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 3598 3599 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 3600 i++) 3601 ret += adapter->rx_pool[i].size * 3602 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 3603 3604 return ret; 3605 } 3606 3607 static int ibmvnic_resume(struct device *dev) 3608 { 3609 struct net_device *netdev = dev_get_drvdata(dev); 3610 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3611 int i; 3612 3613 /* kick the interrupt handlers just in case we lost an interrupt */ 3614 for (i = 0; i < adapter->req_rx_queues; i++) 3615 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 3616 adapter->rx_scrq[i]); 3617 3618 return 0; 3619 } 3620 3621 static struct vio_device_id ibmvnic_device_table[] = { 3622 {"network", "IBM,vnic"}, 3623 {"", "" } 3624 }; 3625 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 3626 3627 static const struct dev_pm_ops ibmvnic_pm_ops = { 3628 .resume = ibmvnic_resume 3629 }; 3630 3631 static struct vio_driver ibmvnic_driver = { 3632 .id_table = ibmvnic_device_table, 3633 .probe = ibmvnic_probe, 3634 .remove = ibmvnic_remove, 3635 .get_desired_dma = ibmvnic_get_desired_dma, 3636 .name = ibmvnic_driver_name, 3637 .pm = &ibmvnic_pm_ops, 3638 }; 3639 3640 /* module functions */ 3641 static int __init ibmvnic_module_init(void) 3642 { 3643 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 3644 IBMVNIC_DRIVER_VERSION); 3645 3646 return vio_register_driver(&ibmvnic_driver); 3647 } 3648 3649 static void __exit ibmvnic_module_exit(void) 3650 { 3651 vio_unregister_driver(&ibmvnic_driver); 3652 } 3653 3654 module_init(ibmvnic_module_init); 3655 module_exit(ibmvnic_module_exit); 3656