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 78 #include "ibmvnic.h" 79 80 static const char ibmvnic_driver_name[] = "ibmvnic"; 81 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 82 83 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>"); 84 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 85 MODULE_LICENSE("GPL"); 86 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 87 88 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 89 static int ibmvnic_remove(struct vio_dev *); 90 static void release_sub_crqs(struct ibmvnic_adapter *); 91 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 92 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 93 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 94 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 95 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 96 union sub_crq *sub_crq); 97 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 98 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 99 static int enable_scrq_irq(struct ibmvnic_adapter *, 100 struct ibmvnic_sub_crq_queue *); 101 static int disable_scrq_irq(struct ibmvnic_adapter *, 102 struct ibmvnic_sub_crq_queue *); 103 static int pending_scrq(struct ibmvnic_adapter *, 104 struct ibmvnic_sub_crq_queue *); 105 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 106 struct ibmvnic_sub_crq_queue *); 107 static int ibmvnic_poll(struct napi_struct *napi, int data); 108 static void send_map_query(struct ibmvnic_adapter *adapter); 109 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 110 static void send_request_unmap(struct ibmvnic_adapter *, u8); 111 static void send_login(struct ibmvnic_adapter *adapter); 112 static void send_cap_queries(struct ibmvnic_adapter *adapter); 113 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 114 static int ibmvnic_init(struct ibmvnic_adapter *); 115 static void release_crq_queue(struct ibmvnic_adapter *); 116 117 struct ibmvnic_stat { 118 char name[ETH_GSTRING_LEN]; 119 int offset; 120 }; 121 122 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 123 offsetof(struct ibmvnic_statistics, stat)) 124 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 125 126 static const struct ibmvnic_stat ibmvnic_stats[] = { 127 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 128 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 129 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 130 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 131 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 132 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 133 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 134 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 135 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 136 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 137 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 138 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 139 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 140 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 141 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 142 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 143 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 144 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 145 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 146 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 147 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 148 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 149 }; 150 151 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 152 unsigned long length, unsigned long *number, 153 unsigned long *irq) 154 { 155 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 156 long rc; 157 158 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 159 *number = retbuf[0]; 160 *irq = retbuf[1]; 161 162 return rc; 163 } 164 165 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 166 struct ibmvnic_long_term_buff *ltb, int size) 167 { 168 struct device *dev = &adapter->vdev->dev; 169 170 ltb->size = size; 171 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 172 GFP_KERNEL); 173 174 if (!ltb->buff) { 175 dev_err(dev, "Couldn't alloc long term buffer\n"); 176 return -ENOMEM; 177 } 178 ltb->map_id = adapter->map_id; 179 adapter->map_id++; 180 181 init_completion(&adapter->fw_done); 182 send_request_map(adapter, ltb->addr, 183 ltb->size, ltb->map_id); 184 wait_for_completion(&adapter->fw_done); 185 return 0; 186 } 187 188 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 189 struct ibmvnic_long_term_buff *ltb) 190 { 191 struct device *dev = &adapter->vdev->dev; 192 193 if (!ltb->buff) 194 return; 195 196 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 197 if (!adapter->failover) 198 send_request_unmap(adapter, ltb->map_id); 199 } 200 201 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 202 struct ibmvnic_rx_pool *pool) 203 { 204 int count = pool->size - atomic_read(&pool->available); 205 struct device *dev = &adapter->vdev->dev; 206 int buffers_added = 0; 207 unsigned long lpar_rc; 208 union sub_crq sub_crq; 209 struct sk_buff *skb; 210 unsigned int offset; 211 dma_addr_t dma_addr; 212 unsigned char *dst; 213 u64 *handle_array; 214 int shift = 0; 215 int index; 216 int i; 217 218 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 219 be32_to_cpu(adapter->login_rsp_buf-> 220 off_rxadd_subcrqs)); 221 222 for (i = 0; i < count; ++i) { 223 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 224 if (!skb) { 225 dev_err(dev, "Couldn't replenish rx buff\n"); 226 adapter->replenish_no_mem++; 227 break; 228 } 229 230 index = pool->free_map[pool->next_free]; 231 232 if (pool->rx_buff[index].skb) 233 dev_err(dev, "Inconsistent free_map!\n"); 234 235 /* Copy the skb to the long term mapped DMA buffer */ 236 offset = index * pool->buff_size; 237 dst = pool->long_term_buff.buff + offset; 238 memset(dst, 0, pool->buff_size); 239 dma_addr = pool->long_term_buff.addr + offset; 240 pool->rx_buff[index].data = dst; 241 242 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 243 pool->rx_buff[index].dma = dma_addr; 244 pool->rx_buff[index].skb = skb; 245 pool->rx_buff[index].pool_index = pool->index; 246 pool->rx_buff[index].size = pool->buff_size; 247 248 memset(&sub_crq, 0, sizeof(sub_crq)); 249 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 250 sub_crq.rx_add.correlator = 251 cpu_to_be64((u64)&pool->rx_buff[index]); 252 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 253 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 254 255 /* The length field of the sCRQ is defined to be 24 bits so the 256 * buffer size needs to be left shifted by a byte before it is 257 * converted to big endian to prevent the last byte from being 258 * truncated. 259 */ 260 #ifdef __LITTLE_ENDIAN__ 261 shift = 8; 262 #endif 263 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 264 265 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 266 &sub_crq); 267 if (lpar_rc != H_SUCCESS) 268 goto failure; 269 270 buffers_added++; 271 adapter->replenish_add_buff_success++; 272 pool->next_free = (pool->next_free + 1) % pool->size; 273 } 274 atomic_add(buffers_added, &pool->available); 275 return; 276 277 failure: 278 dev_info(dev, "replenish pools failure\n"); 279 pool->free_map[pool->next_free] = index; 280 pool->rx_buff[index].skb = NULL; 281 if (!dma_mapping_error(dev, dma_addr)) 282 dma_unmap_single(dev, dma_addr, pool->buff_size, 283 DMA_FROM_DEVICE); 284 285 dev_kfree_skb_any(skb); 286 adapter->replenish_add_buff_failure++; 287 atomic_add(buffers_added, &pool->available); 288 } 289 290 static void replenish_pools(struct ibmvnic_adapter *adapter) 291 { 292 int i; 293 294 if (adapter->migrated) 295 return; 296 297 adapter->replenish_task_cycles++; 298 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 299 i++) { 300 if (adapter->rx_pool[i].active) 301 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 302 } 303 } 304 305 static void release_stats_token(struct ibmvnic_adapter *adapter) 306 { 307 struct device *dev = &adapter->vdev->dev; 308 309 if (!adapter->stats_token) 310 return; 311 312 dma_unmap_single(dev, adapter->stats_token, 313 sizeof(struct ibmvnic_statistics), 314 DMA_FROM_DEVICE); 315 adapter->stats_token = 0; 316 } 317 318 static int init_stats_token(struct ibmvnic_adapter *adapter) 319 { 320 struct device *dev = &adapter->vdev->dev; 321 dma_addr_t stok; 322 323 stok = dma_map_single(dev, &adapter->stats, 324 sizeof(struct ibmvnic_statistics), 325 DMA_FROM_DEVICE); 326 if (dma_mapping_error(dev, stok)) { 327 dev_err(dev, "Couldn't map stats buffer\n"); 328 return -1; 329 } 330 331 adapter->stats_token = stok; 332 return 0; 333 } 334 335 static void release_rx_pools(struct ibmvnic_adapter *adapter) 336 { 337 struct ibmvnic_rx_pool *rx_pool; 338 int rx_scrqs; 339 int i, j; 340 341 if (!adapter->rx_pool) 342 return; 343 344 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 345 for (i = 0; i < rx_scrqs; i++) { 346 rx_pool = &adapter->rx_pool[i]; 347 348 kfree(rx_pool->free_map); 349 free_long_term_buff(adapter, &rx_pool->long_term_buff); 350 351 if (!rx_pool->rx_buff) 352 continue; 353 354 for (j = 0; j < rx_pool->size; j++) { 355 if (rx_pool->rx_buff[j].skb) { 356 dev_kfree_skb_any(rx_pool->rx_buff[i].skb); 357 rx_pool->rx_buff[i].skb = NULL; 358 } 359 } 360 361 kfree(rx_pool->rx_buff); 362 } 363 364 kfree(adapter->rx_pool); 365 adapter->rx_pool = NULL; 366 } 367 368 static int init_rx_pools(struct net_device *netdev) 369 { 370 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 371 struct device *dev = &adapter->vdev->dev; 372 struct ibmvnic_rx_pool *rx_pool; 373 int rxadd_subcrqs; 374 u64 *size_array; 375 int i, j; 376 377 rxadd_subcrqs = 378 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 379 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 380 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 381 382 adapter->rx_pool = kcalloc(rxadd_subcrqs, 383 sizeof(struct ibmvnic_rx_pool), 384 GFP_KERNEL); 385 if (!adapter->rx_pool) { 386 dev_err(dev, "Failed to allocate rx pools\n"); 387 return -1; 388 } 389 390 for (i = 0; i < rxadd_subcrqs; i++) { 391 rx_pool = &adapter->rx_pool[i]; 392 393 netdev_dbg(adapter->netdev, 394 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n", 395 i, adapter->req_rx_add_entries_per_subcrq, 396 be64_to_cpu(size_array[i])); 397 398 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 399 rx_pool->index = i; 400 rx_pool->buff_size = be64_to_cpu(size_array[i]); 401 rx_pool->active = 1; 402 403 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 404 GFP_KERNEL); 405 if (!rx_pool->free_map) { 406 release_rx_pools(adapter); 407 return -1; 408 } 409 410 rx_pool->rx_buff = kcalloc(rx_pool->size, 411 sizeof(struct ibmvnic_rx_buff), 412 GFP_KERNEL); 413 if (!rx_pool->rx_buff) { 414 dev_err(dev, "Couldn't alloc rx buffers\n"); 415 release_rx_pools(adapter); 416 return -1; 417 } 418 419 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 420 rx_pool->size * rx_pool->buff_size)) { 421 release_rx_pools(adapter); 422 return -1; 423 } 424 425 for (j = 0; j < rx_pool->size; ++j) 426 rx_pool->free_map[j] = j; 427 428 atomic_set(&rx_pool->available, 0); 429 rx_pool->next_alloc = 0; 430 rx_pool->next_free = 0; 431 } 432 433 return 0; 434 } 435 436 static void release_tx_pools(struct ibmvnic_adapter *adapter) 437 { 438 struct ibmvnic_tx_pool *tx_pool; 439 int i, tx_scrqs; 440 441 if (!adapter->tx_pool) 442 return; 443 444 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 445 for (i = 0; i < tx_scrqs; i++) { 446 tx_pool = &adapter->tx_pool[i]; 447 kfree(tx_pool->tx_buff); 448 free_long_term_buff(adapter, &tx_pool->long_term_buff); 449 kfree(tx_pool->free_map); 450 } 451 452 kfree(adapter->tx_pool); 453 adapter->tx_pool = NULL; 454 } 455 456 static int init_tx_pools(struct net_device *netdev) 457 { 458 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 459 struct device *dev = &adapter->vdev->dev; 460 struct ibmvnic_tx_pool *tx_pool; 461 int tx_subcrqs; 462 int i, j; 463 464 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 465 adapter->tx_pool = kcalloc(tx_subcrqs, 466 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 467 if (!adapter->tx_pool) 468 return -1; 469 470 for (i = 0; i < tx_subcrqs; i++) { 471 tx_pool = &adapter->tx_pool[i]; 472 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq, 473 sizeof(struct ibmvnic_tx_buff), 474 GFP_KERNEL); 475 if (!tx_pool->tx_buff) { 476 dev_err(dev, "tx pool buffer allocation failed\n"); 477 release_tx_pools(adapter); 478 return -1; 479 } 480 481 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 482 adapter->req_tx_entries_per_subcrq * 483 adapter->req_mtu)) { 484 release_tx_pools(adapter); 485 return -1; 486 } 487 488 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq, 489 sizeof(int), GFP_KERNEL); 490 if (!tx_pool->free_map) { 491 release_tx_pools(adapter); 492 return -1; 493 } 494 495 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 496 tx_pool->free_map[j] = j; 497 498 tx_pool->consumer_index = 0; 499 tx_pool->producer_index = 0; 500 } 501 502 return 0; 503 } 504 505 static void release_bounce_buffer(struct ibmvnic_adapter *adapter) 506 { 507 struct device *dev = &adapter->vdev->dev; 508 509 if (!adapter->bounce_buffer) 510 return; 511 512 if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { 513 dma_unmap_single(dev, adapter->bounce_buffer_dma, 514 adapter->bounce_buffer_size, 515 DMA_BIDIRECTIONAL); 516 adapter->bounce_buffer_dma = DMA_ERROR_CODE; 517 } 518 519 kfree(adapter->bounce_buffer); 520 adapter->bounce_buffer = NULL; 521 } 522 523 static int init_bounce_buffer(struct net_device *netdev) 524 { 525 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 526 struct device *dev = &adapter->vdev->dev; 527 char *buf; 528 int buf_sz; 529 dma_addr_t map_addr; 530 531 buf_sz = (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1; 532 buf = kmalloc(adapter->bounce_buffer_size, GFP_KERNEL); 533 if (!buf) 534 return -1; 535 536 map_addr = dma_map_single(dev, buf, buf_sz, DMA_TO_DEVICE); 537 if (dma_mapping_error(dev, map_addr)) { 538 dev_err(dev, "Couldn't map bounce buffer\n"); 539 kfree(buf); 540 return -1; 541 } 542 543 adapter->bounce_buffer = buf; 544 adapter->bounce_buffer_size = buf_sz; 545 adapter->bounce_buffer_dma = map_addr; 546 return 0; 547 } 548 549 static int ibmvnic_login(struct net_device *netdev) 550 { 551 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 552 unsigned long timeout = msecs_to_jiffies(30000); 553 struct device *dev = &adapter->vdev->dev; 554 555 do { 556 if (adapter->renegotiate) { 557 adapter->renegotiate = false; 558 release_sub_crqs(adapter); 559 560 reinit_completion(&adapter->init_done); 561 send_cap_queries(adapter); 562 if (!wait_for_completion_timeout(&adapter->init_done, 563 timeout)) { 564 dev_err(dev, "Capabilities query timeout\n"); 565 return -1; 566 } 567 } 568 569 reinit_completion(&adapter->init_done); 570 send_login(adapter); 571 if (!wait_for_completion_timeout(&adapter->init_done, 572 timeout)) { 573 dev_err(dev, "Login timeout\n"); 574 return -1; 575 } 576 } while (adapter->renegotiate); 577 578 return 0; 579 } 580 581 static void release_resources(struct ibmvnic_adapter *adapter) 582 { 583 release_bounce_buffer(adapter); 584 release_tx_pools(adapter); 585 release_rx_pools(adapter); 586 587 release_sub_crqs(adapter); 588 release_crq_queue(adapter); 589 590 release_stats_token(adapter); 591 } 592 593 static int ibmvnic_open(struct net_device *netdev) 594 { 595 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 596 struct device *dev = &adapter->vdev->dev; 597 union ibmvnic_crq crq; 598 int rc = 0; 599 int i; 600 601 if (adapter->is_closed) { 602 rc = ibmvnic_init(adapter); 603 if (rc) 604 return rc; 605 } 606 607 rc = ibmvnic_login(netdev); 608 if (rc) 609 return rc; 610 611 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 612 if (rc) { 613 dev_err(dev, "failed to set the number of tx queues\n"); 614 return -1; 615 } 616 617 rc = init_sub_crq_irqs(adapter); 618 if (rc) { 619 dev_err(dev, "failed to initialize sub crq irqs\n"); 620 return -1; 621 } 622 623 adapter->map_id = 1; 624 adapter->napi = kcalloc(adapter->req_rx_queues, 625 sizeof(struct napi_struct), GFP_KERNEL); 626 if (!adapter->napi) 627 goto ibmvnic_open_fail; 628 for (i = 0; i < adapter->req_rx_queues; i++) { 629 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, 630 NAPI_POLL_WEIGHT); 631 napi_enable(&adapter->napi[i]); 632 } 633 634 send_map_query(adapter); 635 636 rc = init_rx_pools(netdev); 637 if (rc) 638 goto ibmvnic_open_fail; 639 640 rc = init_tx_pools(netdev); 641 if (rc) 642 goto ibmvnic_open_fail; 643 644 rc = init_bounce_buffer(netdev); 645 if (rc) 646 goto ibmvnic_open_fail; 647 648 replenish_pools(adapter); 649 650 /* We're ready to receive frames, enable the sub-crq interrupts and 651 * set the logical link state to up 652 */ 653 for (i = 0; i < adapter->req_rx_queues; i++) 654 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 655 656 for (i = 0; i < adapter->req_tx_queues; i++) 657 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 658 659 memset(&crq, 0, sizeof(crq)); 660 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 661 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 662 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_UP; 663 ibmvnic_send_crq(adapter, &crq); 664 665 netif_tx_start_all_queues(netdev); 666 adapter->is_closed = false; 667 668 return 0; 669 670 ibmvnic_open_fail: 671 for (i = 0; i < adapter->req_rx_queues; i++) 672 napi_disable(&adapter->napi[i]); 673 release_resources(adapter); 674 return -ENOMEM; 675 } 676 677 static int ibmvnic_close(struct net_device *netdev) 678 { 679 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 680 union ibmvnic_crq crq; 681 int i; 682 683 adapter->closing = true; 684 685 for (i = 0; i < adapter->req_rx_queues; i++) 686 napi_disable(&adapter->napi[i]); 687 688 if (!adapter->failover) 689 netif_tx_stop_all_queues(netdev); 690 691 memset(&crq, 0, sizeof(crq)); 692 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 693 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 694 crq.logical_link_state.link_state = IBMVNIC_LOGICAL_LNK_DN; 695 ibmvnic_send_crq(adapter, &crq); 696 697 release_resources(adapter); 698 699 adapter->is_closed = true; 700 adapter->closing = false; 701 return 0; 702 } 703 704 /** 705 * build_hdr_data - creates L2/L3/L4 header data buffer 706 * @hdr_field - bitfield determining needed headers 707 * @skb - socket buffer 708 * @hdr_len - array of header lengths 709 * @tot_len - total length of data 710 * 711 * Reads hdr_field to determine which headers are needed by firmware. 712 * Builds a buffer containing these headers. Saves individual header 713 * lengths and total buffer length to be used to build descriptors. 714 */ 715 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 716 int *hdr_len, u8 *hdr_data) 717 { 718 int len = 0; 719 u8 *hdr; 720 721 hdr_len[0] = sizeof(struct ethhdr); 722 723 if (skb->protocol == htons(ETH_P_IP)) { 724 hdr_len[1] = ip_hdr(skb)->ihl * 4; 725 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 726 hdr_len[2] = tcp_hdrlen(skb); 727 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 728 hdr_len[2] = sizeof(struct udphdr); 729 } else if (skb->protocol == htons(ETH_P_IPV6)) { 730 hdr_len[1] = sizeof(struct ipv6hdr); 731 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 732 hdr_len[2] = tcp_hdrlen(skb); 733 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 734 hdr_len[2] = sizeof(struct udphdr); 735 } 736 737 memset(hdr_data, 0, 120); 738 if ((hdr_field >> 6) & 1) { 739 hdr = skb_mac_header(skb); 740 memcpy(hdr_data, hdr, hdr_len[0]); 741 len += hdr_len[0]; 742 } 743 744 if ((hdr_field >> 5) & 1) { 745 hdr = skb_network_header(skb); 746 memcpy(hdr_data + len, hdr, hdr_len[1]); 747 len += hdr_len[1]; 748 } 749 750 if ((hdr_field >> 4) & 1) { 751 hdr = skb_transport_header(skb); 752 memcpy(hdr_data + len, hdr, hdr_len[2]); 753 len += hdr_len[2]; 754 } 755 return len; 756 } 757 758 /** 759 * create_hdr_descs - create header and header extension descriptors 760 * @hdr_field - bitfield determining needed headers 761 * @data - buffer containing header data 762 * @len - length of data buffer 763 * @hdr_len - array of individual header lengths 764 * @scrq_arr - descriptor array 765 * 766 * Creates header and, if needed, header extension descriptors and 767 * places them in a descriptor array, scrq_arr 768 */ 769 770 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 771 union sub_crq *scrq_arr) 772 { 773 union sub_crq hdr_desc; 774 int tmp_len = len; 775 u8 *data, *cur; 776 int tmp; 777 778 while (tmp_len > 0) { 779 cur = hdr_data + len - tmp_len; 780 781 memset(&hdr_desc, 0, sizeof(hdr_desc)); 782 if (cur != hdr_data) { 783 data = hdr_desc.hdr_ext.data; 784 tmp = tmp_len > 29 ? 29 : tmp_len; 785 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 786 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 787 hdr_desc.hdr_ext.len = tmp; 788 } else { 789 data = hdr_desc.hdr.data; 790 tmp = tmp_len > 24 ? 24 : tmp_len; 791 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 792 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 793 hdr_desc.hdr.len = tmp; 794 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 795 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 796 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 797 hdr_desc.hdr.flag = hdr_field << 1; 798 } 799 memcpy(data, cur, tmp); 800 tmp_len -= tmp; 801 *scrq_arr = hdr_desc; 802 scrq_arr++; 803 } 804 } 805 806 /** 807 * build_hdr_descs_arr - build a header descriptor array 808 * @skb - socket buffer 809 * @num_entries - number of descriptors to be sent 810 * @subcrq - first TX descriptor 811 * @hdr_field - bit field determining which headers will be sent 812 * 813 * This function will build a TX descriptor array with applicable 814 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 815 */ 816 817 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 818 int *num_entries, u8 hdr_field) 819 { 820 int hdr_len[3] = {0, 0, 0}; 821 int tot_len, len; 822 u8 *hdr_data = txbuff->hdr_data; 823 824 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 825 txbuff->hdr_data); 826 len = tot_len; 827 len -= 24; 828 if (len > 0) 829 num_entries += len % 29 ? len / 29 + 1 : len / 29; 830 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 831 txbuff->indir_arr + 1); 832 } 833 834 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 835 { 836 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 837 int queue_num = skb_get_queue_mapping(skb); 838 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 839 struct device *dev = &adapter->vdev->dev; 840 struct ibmvnic_tx_buff *tx_buff = NULL; 841 struct ibmvnic_sub_crq_queue *tx_scrq; 842 struct ibmvnic_tx_pool *tx_pool; 843 unsigned int tx_send_failed = 0; 844 unsigned int tx_map_failed = 0; 845 unsigned int tx_dropped = 0; 846 unsigned int tx_packets = 0; 847 unsigned int tx_bytes = 0; 848 dma_addr_t data_dma_addr; 849 struct netdev_queue *txq; 850 bool used_bounce = false; 851 unsigned long lpar_rc; 852 union sub_crq tx_crq; 853 unsigned int offset; 854 int num_entries = 1; 855 unsigned char *dst; 856 u64 *handle_array; 857 int index = 0; 858 int ret = 0; 859 860 tx_pool = &adapter->tx_pool[queue_num]; 861 tx_scrq = adapter->tx_scrq[queue_num]; 862 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 863 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 864 be32_to_cpu(adapter->login_rsp_buf-> 865 off_txsubm_subcrqs)); 866 if (adapter->migrated) { 867 tx_send_failed++; 868 tx_dropped++; 869 ret = NETDEV_TX_BUSY; 870 goto out; 871 } 872 873 index = tx_pool->free_map[tx_pool->consumer_index]; 874 offset = index * adapter->req_mtu; 875 dst = tx_pool->long_term_buff.buff + offset; 876 memset(dst, 0, adapter->req_mtu); 877 skb_copy_from_linear_data(skb, dst, skb->len); 878 data_dma_addr = tx_pool->long_term_buff.addr + offset; 879 880 tx_pool->consumer_index = 881 (tx_pool->consumer_index + 1) % 882 adapter->req_tx_entries_per_subcrq; 883 884 tx_buff = &tx_pool->tx_buff[index]; 885 tx_buff->skb = skb; 886 tx_buff->data_dma[0] = data_dma_addr; 887 tx_buff->data_len[0] = skb->len; 888 tx_buff->index = index; 889 tx_buff->pool_index = queue_num; 890 tx_buff->last_frag = true; 891 tx_buff->used_bounce = used_bounce; 892 893 memset(&tx_crq, 0, sizeof(tx_crq)); 894 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 895 tx_crq.v1.type = IBMVNIC_TX_DESC; 896 tx_crq.v1.n_crq_elem = 1; 897 tx_crq.v1.n_sge = 1; 898 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 899 tx_crq.v1.correlator = cpu_to_be32(index); 900 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 901 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 902 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 903 904 if (adapter->vlan_header_insertion) { 905 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 906 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 907 } 908 909 if (skb->protocol == htons(ETH_P_IP)) { 910 if (ip_hdr(skb)->version == 4) 911 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 912 else if (ip_hdr(skb)->version == 6) 913 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 914 915 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 916 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 917 else if (ip_hdr(skb)->protocol != IPPROTO_TCP) 918 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 919 } 920 921 if (skb->ip_summed == CHECKSUM_PARTIAL) { 922 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 923 hdrs += 2; 924 } 925 /* determine if l2/3/4 headers are sent to firmware */ 926 if ((*hdrs >> 7) & 1 && 927 (skb->protocol == htons(ETH_P_IP) || 928 skb->protocol == htons(ETH_P_IPV6))) { 929 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 930 tx_crq.v1.n_crq_elem = num_entries; 931 tx_buff->indir_arr[0] = tx_crq; 932 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 933 sizeof(tx_buff->indir_arr), 934 DMA_TO_DEVICE); 935 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 936 if (!firmware_has_feature(FW_FEATURE_CMO)) 937 dev_err(dev, "tx: unable to map descriptor array\n"); 938 tx_map_failed++; 939 tx_dropped++; 940 ret = NETDEV_TX_BUSY; 941 goto out; 942 } 943 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 944 (u64)tx_buff->indir_dma, 945 (u64)num_entries); 946 } else { 947 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 948 &tx_crq); 949 } 950 if (lpar_rc != H_SUCCESS) { 951 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 952 953 if (tx_pool->consumer_index == 0) 954 tx_pool->consumer_index = 955 adapter->req_tx_entries_per_subcrq - 1; 956 else 957 tx_pool->consumer_index--; 958 959 tx_send_failed++; 960 tx_dropped++; 961 ret = NETDEV_TX_BUSY; 962 goto out; 963 } 964 965 atomic_inc(&tx_scrq->used); 966 967 if (atomic_read(&tx_scrq->used) >= adapter->req_tx_entries_per_subcrq) { 968 netdev_info(netdev, "Stopping queue %d\n", queue_num); 969 netif_stop_subqueue(netdev, queue_num); 970 } 971 972 tx_packets++; 973 tx_bytes += skb->len; 974 txq->trans_start = jiffies; 975 ret = NETDEV_TX_OK; 976 977 out: 978 netdev->stats.tx_dropped += tx_dropped; 979 netdev->stats.tx_bytes += tx_bytes; 980 netdev->stats.tx_packets += tx_packets; 981 adapter->tx_send_failed += tx_send_failed; 982 adapter->tx_map_failed += tx_map_failed; 983 984 return ret; 985 } 986 987 static void ibmvnic_set_multi(struct net_device *netdev) 988 { 989 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 990 struct netdev_hw_addr *ha; 991 union ibmvnic_crq crq; 992 993 memset(&crq, 0, sizeof(crq)); 994 crq.request_capability.first = IBMVNIC_CRQ_CMD; 995 crq.request_capability.cmd = REQUEST_CAPABILITY; 996 997 if (netdev->flags & IFF_PROMISC) { 998 if (!adapter->promisc_supported) 999 return; 1000 } else { 1001 if (netdev->flags & IFF_ALLMULTI) { 1002 /* Accept all multicast */ 1003 memset(&crq, 0, sizeof(crq)); 1004 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1005 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1006 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1007 ibmvnic_send_crq(adapter, &crq); 1008 } else if (netdev_mc_empty(netdev)) { 1009 /* Reject all multicast */ 1010 memset(&crq, 0, sizeof(crq)); 1011 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1012 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1013 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1014 ibmvnic_send_crq(adapter, &crq); 1015 } else { 1016 /* Accept one or more multicast(s) */ 1017 netdev_for_each_mc_addr(ha, netdev) { 1018 memset(&crq, 0, sizeof(crq)); 1019 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1020 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1021 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1022 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1023 ha->addr); 1024 ibmvnic_send_crq(adapter, &crq); 1025 } 1026 } 1027 } 1028 } 1029 1030 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1031 { 1032 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1033 struct sockaddr *addr = p; 1034 union ibmvnic_crq crq; 1035 1036 if (!is_valid_ether_addr(addr->sa_data)) 1037 return -EADDRNOTAVAIL; 1038 1039 memset(&crq, 0, sizeof(crq)); 1040 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1041 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1042 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1043 ibmvnic_send_crq(adapter, &crq); 1044 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1045 return 0; 1046 } 1047 1048 static void ibmvnic_tx_timeout(struct net_device *dev) 1049 { 1050 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1051 int rc; 1052 1053 /* Adapter timed out, resetting it */ 1054 release_sub_crqs(adapter); 1055 rc = ibmvnic_reset_crq(adapter); 1056 if (rc) 1057 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n"); 1058 else 1059 ibmvnic_send_crq_init(adapter); 1060 } 1061 1062 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 1063 struct ibmvnic_rx_buff *rx_buff) 1064 { 1065 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 1066 1067 rx_buff->skb = NULL; 1068 1069 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 1070 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 1071 1072 atomic_dec(&pool->available); 1073 } 1074 1075 static int ibmvnic_poll(struct napi_struct *napi, int budget) 1076 { 1077 struct net_device *netdev = napi->dev; 1078 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1079 int scrq_num = (int)(napi - adapter->napi); 1080 int frames_processed = 0; 1081 restart_poll: 1082 while (frames_processed < budget) { 1083 struct sk_buff *skb; 1084 struct ibmvnic_rx_buff *rx_buff; 1085 union sub_crq *next; 1086 u32 length; 1087 u16 offset; 1088 u8 flags = 0; 1089 1090 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 1091 break; 1092 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 1093 rx_buff = 1094 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 1095 rx_comp.correlator); 1096 /* do error checking */ 1097 if (next->rx_comp.rc) { 1098 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); 1099 /* free the entry */ 1100 next->rx_comp.first = 0; 1101 remove_buff_from_pool(adapter, rx_buff); 1102 break; 1103 } 1104 1105 length = be32_to_cpu(next->rx_comp.len); 1106 offset = be16_to_cpu(next->rx_comp.off_frame_data); 1107 flags = next->rx_comp.flags; 1108 skb = rx_buff->skb; 1109 skb_copy_to_linear_data(skb, rx_buff->data + offset, 1110 length); 1111 skb->vlan_tci = be16_to_cpu(next->rx_comp.vlan_tci); 1112 /* free the entry */ 1113 next->rx_comp.first = 0; 1114 remove_buff_from_pool(adapter, rx_buff); 1115 1116 skb_put(skb, length); 1117 skb->protocol = eth_type_trans(skb, netdev); 1118 1119 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 1120 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 1121 skb->ip_summed = CHECKSUM_UNNECESSARY; 1122 } 1123 1124 length = skb->len; 1125 napi_gro_receive(napi, skb); /* send it up */ 1126 netdev->stats.rx_packets++; 1127 netdev->stats.rx_bytes += length; 1128 frames_processed++; 1129 } 1130 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 1131 1132 if (frames_processed < budget) { 1133 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1134 napi_complete_done(napi, frames_processed); 1135 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1136 napi_reschedule(napi)) { 1137 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1138 goto restart_poll; 1139 } 1140 } 1141 return frames_processed; 1142 } 1143 1144 #ifdef CONFIG_NET_POLL_CONTROLLER 1145 static void ibmvnic_netpoll_controller(struct net_device *dev) 1146 { 1147 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1148 int i; 1149 1150 replenish_pools(netdev_priv(dev)); 1151 for (i = 0; i < adapter->req_rx_queues; i++) 1152 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1153 adapter->rx_scrq[i]); 1154 } 1155 #endif 1156 1157 static const struct net_device_ops ibmvnic_netdev_ops = { 1158 .ndo_open = ibmvnic_open, 1159 .ndo_stop = ibmvnic_close, 1160 .ndo_start_xmit = ibmvnic_xmit, 1161 .ndo_set_rx_mode = ibmvnic_set_multi, 1162 .ndo_set_mac_address = ibmvnic_set_mac, 1163 .ndo_validate_addr = eth_validate_addr, 1164 .ndo_tx_timeout = ibmvnic_tx_timeout, 1165 #ifdef CONFIG_NET_POLL_CONTROLLER 1166 .ndo_poll_controller = ibmvnic_netpoll_controller, 1167 #endif 1168 }; 1169 1170 /* ethtool functions */ 1171 1172 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 1173 struct ethtool_link_ksettings *cmd) 1174 { 1175 u32 supported, advertising; 1176 1177 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 1178 SUPPORTED_FIBRE); 1179 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 1180 ADVERTISED_FIBRE); 1181 cmd->base.speed = SPEED_1000; 1182 cmd->base.duplex = DUPLEX_FULL; 1183 cmd->base.port = PORT_FIBRE; 1184 cmd->base.phy_address = 0; 1185 cmd->base.autoneg = AUTONEG_ENABLE; 1186 1187 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1188 supported); 1189 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1190 advertising); 1191 1192 return 0; 1193 } 1194 1195 static void ibmvnic_get_drvinfo(struct net_device *dev, 1196 struct ethtool_drvinfo *info) 1197 { 1198 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 1199 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 1200 } 1201 1202 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 1203 { 1204 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1205 1206 return adapter->msg_enable; 1207 } 1208 1209 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 1210 { 1211 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1212 1213 adapter->msg_enable = data; 1214 } 1215 1216 static u32 ibmvnic_get_link(struct net_device *netdev) 1217 { 1218 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1219 1220 /* Don't need to send a query because we request a logical link up at 1221 * init and then we wait for link state indications 1222 */ 1223 return adapter->logical_link_state; 1224 } 1225 1226 static void ibmvnic_get_ringparam(struct net_device *netdev, 1227 struct ethtool_ringparam *ring) 1228 { 1229 ring->rx_max_pending = 0; 1230 ring->tx_max_pending = 0; 1231 ring->rx_mini_max_pending = 0; 1232 ring->rx_jumbo_max_pending = 0; 1233 ring->rx_pending = 0; 1234 ring->tx_pending = 0; 1235 ring->rx_mini_pending = 0; 1236 ring->rx_jumbo_pending = 0; 1237 } 1238 1239 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 1240 { 1241 int i; 1242 1243 if (stringset != ETH_SS_STATS) 1244 return; 1245 1246 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 1247 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 1248 } 1249 1250 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 1251 { 1252 switch (sset) { 1253 case ETH_SS_STATS: 1254 return ARRAY_SIZE(ibmvnic_stats); 1255 default: 1256 return -EOPNOTSUPP; 1257 } 1258 } 1259 1260 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 1261 struct ethtool_stats *stats, u64 *data) 1262 { 1263 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1264 union ibmvnic_crq crq; 1265 int i; 1266 1267 memset(&crq, 0, sizeof(crq)); 1268 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 1269 crq.request_statistics.cmd = REQUEST_STATISTICS; 1270 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 1271 crq.request_statistics.len = 1272 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 1273 1274 /* Wait for data to be written */ 1275 init_completion(&adapter->stats_done); 1276 ibmvnic_send_crq(adapter, &crq); 1277 wait_for_completion(&adapter->stats_done); 1278 1279 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 1280 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); 1281 } 1282 1283 static const struct ethtool_ops ibmvnic_ethtool_ops = { 1284 .get_drvinfo = ibmvnic_get_drvinfo, 1285 .get_msglevel = ibmvnic_get_msglevel, 1286 .set_msglevel = ibmvnic_set_msglevel, 1287 .get_link = ibmvnic_get_link, 1288 .get_ringparam = ibmvnic_get_ringparam, 1289 .get_strings = ibmvnic_get_strings, 1290 .get_sset_count = ibmvnic_get_sset_count, 1291 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 1292 .get_link_ksettings = ibmvnic_get_link_ksettings, 1293 }; 1294 1295 /* Routines for managing CRQs/sCRQs */ 1296 1297 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 1298 struct ibmvnic_sub_crq_queue *scrq) 1299 { 1300 struct device *dev = &adapter->vdev->dev; 1301 long rc; 1302 1303 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 1304 1305 /* Close the sub-crqs */ 1306 do { 1307 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 1308 adapter->vdev->unit_address, 1309 scrq->crq_num); 1310 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 1311 1312 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1313 DMA_BIDIRECTIONAL); 1314 free_pages((unsigned long)scrq->msgs, 2); 1315 kfree(scrq); 1316 } 1317 1318 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 1319 *adapter) 1320 { 1321 struct device *dev = &adapter->vdev->dev; 1322 struct ibmvnic_sub_crq_queue *scrq; 1323 int rc; 1324 1325 scrq = kmalloc(sizeof(*scrq), GFP_ATOMIC); 1326 if (!scrq) 1327 return NULL; 1328 1329 scrq->msgs = (union sub_crq *)__get_free_pages(GFP_ATOMIC, 2); 1330 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 1331 if (!scrq->msgs) { 1332 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 1333 goto zero_page_failed; 1334 } 1335 1336 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 1337 DMA_BIDIRECTIONAL); 1338 if (dma_mapping_error(dev, scrq->msg_token)) { 1339 dev_warn(dev, "Couldn't map crq queue messages page\n"); 1340 goto map_failed; 1341 } 1342 1343 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1344 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1345 1346 if (rc == H_RESOURCE) 1347 rc = ibmvnic_reset_crq(adapter); 1348 1349 if (rc == H_CLOSED) { 1350 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 1351 } else if (rc) { 1352 dev_warn(dev, "Error %d registering sub-crq\n", rc); 1353 goto reg_failed; 1354 } 1355 1356 scrq->adapter = adapter; 1357 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 1358 scrq->cur = 0; 1359 atomic_set(&scrq->used, 0); 1360 scrq->rx_skb_top = NULL; 1361 spin_lock_init(&scrq->lock); 1362 1363 netdev_dbg(adapter->netdev, 1364 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 1365 scrq->crq_num, scrq->hw_irq, scrq->irq); 1366 1367 return scrq; 1368 1369 reg_failed: 1370 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1371 DMA_BIDIRECTIONAL); 1372 map_failed: 1373 free_pages((unsigned long)scrq->msgs, 2); 1374 zero_page_failed: 1375 kfree(scrq); 1376 1377 return NULL; 1378 } 1379 1380 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 1381 { 1382 int i; 1383 1384 if (adapter->tx_scrq) { 1385 for (i = 0; i < adapter->req_tx_queues; i++) { 1386 if (!adapter->tx_scrq[i]) 1387 continue; 1388 1389 if (adapter->tx_scrq[i]->irq) { 1390 free_irq(adapter->tx_scrq[i]->irq, 1391 adapter->tx_scrq[i]); 1392 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 1393 adapter->tx_scrq[i]->irq = 0; 1394 } 1395 1396 release_sub_crq_queue(adapter, adapter->tx_scrq[i]); 1397 } 1398 1399 kfree(adapter->tx_scrq); 1400 adapter->tx_scrq = NULL; 1401 } 1402 1403 if (adapter->rx_scrq) { 1404 for (i = 0; i < adapter->req_rx_queues; i++) { 1405 if (!adapter->rx_scrq[i]) 1406 continue; 1407 1408 if (adapter->rx_scrq[i]->irq) { 1409 free_irq(adapter->rx_scrq[i]->irq, 1410 adapter->rx_scrq[i]); 1411 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 1412 adapter->rx_scrq[i]->irq = 0; 1413 } 1414 1415 release_sub_crq_queue(adapter, adapter->rx_scrq[i]); 1416 } 1417 1418 kfree(adapter->rx_scrq); 1419 adapter->rx_scrq = NULL; 1420 } 1421 } 1422 1423 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 1424 struct ibmvnic_sub_crq_queue *scrq) 1425 { 1426 struct device *dev = &adapter->vdev->dev; 1427 unsigned long rc; 1428 1429 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1430 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1431 if (rc) 1432 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 1433 scrq->hw_irq, rc); 1434 return rc; 1435 } 1436 1437 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 1438 struct ibmvnic_sub_crq_queue *scrq) 1439 { 1440 struct device *dev = &adapter->vdev->dev; 1441 unsigned long rc; 1442 1443 if (scrq->hw_irq > 0x100000000ULL) { 1444 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 1445 return 1; 1446 } 1447 1448 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1449 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1450 if (rc) 1451 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 1452 scrq->hw_irq, rc); 1453 return rc; 1454 } 1455 1456 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 1457 struct ibmvnic_sub_crq_queue *scrq) 1458 { 1459 struct device *dev = &adapter->vdev->dev; 1460 struct ibmvnic_tx_buff *txbuff; 1461 union sub_crq *next; 1462 int index; 1463 int i, j; 1464 u8 first; 1465 1466 restart_loop: 1467 while (pending_scrq(adapter, scrq)) { 1468 unsigned int pool = scrq->pool_index; 1469 1470 next = ibmvnic_next_scrq(adapter, scrq); 1471 for (i = 0; i < next->tx_comp.num_comps; i++) { 1472 if (next->tx_comp.rcs[i]) { 1473 dev_err(dev, "tx error %x\n", 1474 next->tx_comp.rcs[i]); 1475 continue; 1476 } 1477 index = be32_to_cpu(next->tx_comp.correlators[i]); 1478 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 1479 1480 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 1481 if (!txbuff->data_dma[j]) 1482 continue; 1483 1484 txbuff->data_dma[j] = 0; 1485 txbuff->used_bounce = false; 1486 } 1487 /* if sub_crq was sent indirectly */ 1488 first = txbuff->indir_arr[0].generic.first; 1489 if (first == IBMVNIC_CRQ_CMD) { 1490 dma_unmap_single(dev, txbuff->indir_dma, 1491 sizeof(txbuff->indir_arr), 1492 DMA_TO_DEVICE); 1493 } 1494 1495 if (txbuff->last_frag) { 1496 atomic_dec(&scrq->used); 1497 1498 if (atomic_read(&scrq->used) <= 1499 (adapter->req_tx_entries_per_subcrq / 2) && 1500 netif_subqueue_stopped(adapter->netdev, 1501 txbuff->skb)) { 1502 netif_wake_subqueue(adapter->netdev, 1503 scrq->pool_index); 1504 netdev_dbg(adapter->netdev, 1505 "Started queue %d\n", 1506 scrq->pool_index); 1507 } 1508 1509 dev_kfree_skb_any(txbuff->skb); 1510 } 1511 1512 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 1513 producer_index] = index; 1514 adapter->tx_pool[pool].producer_index = 1515 (adapter->tx_pool[pool].producer_index + 1) % 1516 adapter->req_tx_entries_per_subcrq; 1517 } 1518 /* remove tx_comp scrq*/ 1519 next->tx_comp.first = 0; 1520 } 1521 1522 enable_scrq_irq(adapter, scrq); 1523 1524 if (pending_scrq(adapter, scrq)) { 1525 disable_scrq_irq(adapter, scrq); 1526 goto restart_loop; 1527 } 1528 1529 return 0; 1530 } 1531 1532 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 1533 { 1534 struct ibmvnic_sub_crq_queue *scrq = instance; 1535 struct ibmvnic_adapter *adapter = scrq->adapter; 1536 1537 disable_scrq_irq(adapter, scrq); 1538 ibmvnic_complete_tx(adapter, scrq); 1539 1540 return IRQ_HANDLED; 1541 } 1542 1543 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 1544 { 1545 struct ibmvnic_sub_crq_queue *scrq = instance; 1546 struct ibmvnic_adapter *adapter = scrq->adapter; 1547 1548 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 1549 disable_scrq_irq(adapter, scrq); 1550 __napi_schedule(&adapter->napi[scrq->scrq_num]); 1551 } 1552 1553 return IRQ_HANDLED; 1554 } 1555 1556 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 1557 { 1558 struct device *dev = &adapter->vdev->dev; 1559 struct ibmvnic_sub_crq_queue *scrq; 1560 int i = 0, j = 0; 1561 int rc = 0; 1562 1563 for (i = 0; i < adapter->req_tx_queues; i++) { 1564 scrq = adapter->tx_scrq[i]; 1565 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1566 1567 if (!scrq->irq) { 1568 rc = -EINVAL; 1569 dev_err(dev, "Error mapping irq\n"); 1570 goto req_tx_irq_failed; 1571 } 1572 1573 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 1574 0, "ibmvnic_tx", scrq); 1575 1576 if (rc) { 1577 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 1578 scrq->irq, rc); 1579 irq_dispose_mapping(scrq->irq); 1580 goto req_rx_irq_failed; 1581 } 1582 } 1583 1584 for (i = 0; i < adapter->req_rx_queues; i++) { 1585 scrq = adapter->rx_scrq[i]; 1586 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1587 if (!scrq->irq) { 1588 rc = -EINVAL; 1589 dev_err(dev, "Error mapping irq\n"); 1590 goto req_rx_irq_failed; 1591 } 1592 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 1593 0, "ibmvnic_rx", scrq); 1594 if (rc) { 1595 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 1596 scrq->irq, rc); 1597 irq_dispose_mapping(scrq->irq); 1598 goto req_rx_irq_failed; 1599 } 1600 } 1601 return rc; 1602 1603 req_rx_irq_failed: 1604 for (j = 0; j < i; j++) { 1605 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 1606 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1607 } 1608 i = adapter->req_tx_queues; 1609 req_tx_irq_failed: 1610 for (j = 0; j < i; j++) { 1611 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 1612 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1613 } 1614 release_sub_crqs(adapter); 1615 return rc; 1616 } 1617 1618 static void init_sub_crqs(struct ibmvnic_adapter *adapter, int retry) 1619 { 1620 struct device *dev = &adapter->vdev->dev; 1621 struct ibmvnic_sub_crq_queue **allqueues; 1622 int registered_queues = 0; 1623 union ibmvnic_crq crq; 1624 int total_queues; 1625 int more = 0; 1626 int i; 1627 1628 if (!retry) { 1629 /* Sub-CRQ entries are 32 byte long */ 1630 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 1631 1632 if (adapter->min_tx_entries_per_subcrq > entries_page || 1633 adapter->min_rx_add_entries_per_subcrq > entries_page) { 1634 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 1635 goto allqueues_failed; 1636 } 1637 1638 /* Get the minimum between the queried max and the entries 1639 * that fit in our PAGE_SIZE 1640 */ 1641 adapter->req_tx_entries_per_subcrq = 1642 adapter->max_tx_entries_per_subcrq > entries_page ? 1643 entries_page : adapter->max_tx_entries_per_subcrq; 1644 adapter->req_rx_add_entries_per_subcrq = 1645 adapter->max_rx_add_entries_per_subcrq > entries_page ? 1646 entries_page : adapter->max_rx_add_entries_per_subcrq; 1647 1648 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; 1649 adapter->req_rx_queues = adapter->opt_rx_comp_queues; 1650 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 1651 1652 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 1653 } 1654 1655 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 1656 1657 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_ATOMIC); 1658 if (!allqueues) 1659 goto allqueues_failed; 1660 1661 for (i = 0; i < total_queues; i++) { 1662 allqueues[i] = init_sub_crq_queue(adapter); 1663 if (!allqueues[i]) { 1664 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 1665 break; 1666 } 1667 registered_queues++; 1668 } 1669 1670 /* Make sure we were able to register the minimum number of queues */ 1671 if (registered_queues < 1672 adapter->min_tx_queues + adapter->min_rx_queues) { 1673 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 1674 goto tx_failed; 1675 } 1676 1677 /* Distribute the failed allocated queues*/ 1678 for (i = 0; i < total_queues - registered_queues + more ; i++) { 1679 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 1680 switch (i % 3) { 1681 case 0: 1682 if (adapter->req_rx_queues > adapter->min_rx_queues) 1683 adapter->req_rx_queues--; 1684 else 1685 more++; 1686 break; 1687 case 1: 1688 if (adapter->req_tx_queues > adapter->min_tx_queues) 1689 adapter->req_tx_queues--; 1690 else 1691 more++; 1692 break; 1693 } 1694 } 1695 1696 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 1697 sizeof(*adapter->tx_scrq), GFP_ATOMIC); 1698 if (!adapter->tx_scrq) 1699 goto tx_failed; 1700 1701 for (i = 0; i < adapter->req_tx_queues; i++) { 1702 adapter->tx_scrq[i] = allqueues[i]; 1703 adapter->tx_scrq[i]->pool_index = i; 1704 } 1705 1706 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 1707 sizeof(*adapter->rx_scrq), GFP_ATOMIC); 1708 if (!adapter->rx_scrq) 1709 goto rx_failed; 1710 1711 for (i = 0; i < adapter->req_rx_queues; i++) { 1712 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 1713 adapter->rx_scrq[i]->scrq_num = i; 1714 } 1715 1716 memset(&crq, 0, sizeof(crq)); 1717 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1718 crq.request_capability.cmd = REQUEST_CAPABILITY; 1719 1720 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 1721 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 1722 atomic_inc(&adapter->running_cap_crqs); 1723 ibmvnic_send_crq(adapter, &crq); 1724 1725 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 1726 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 1727 atomic_inc(&adapter->running_cap_crqs); 1728 ibmvnic_send_crq(adapter, &crq); 1729 1730 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 1731 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 1732 atomic_inc(&adapter->running_cap_crqs); 1733 ibmvnic_send_crq(adapter, &crq); 1734 1735 crq.request_capability.capability = 1736 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 1737 crq.request_capability.number = 1738 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 1739 atomic_inc(&adapter->running_cap_crqs); 1740 ibmvnic_send_crq(adapter, &crq); 1741 1742 crq.request_capability.capability = 1743 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 1744 crq.request_capability.number = 1745 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 1746 atomic_inc(&adapter->running_cap_crqs); 1747 ibmvnic_send_crq(adapter, &crq); 1748 1749 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 1750 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 1751 atomic_inc(&adapter->running_cap_crqs); 1752 ibmvnic_send_crq(adapter, &crq); 1753 1754 if (adapter->netdev->flags & IFF_PROMISC) { 1755 if (adapter->promisc_supported) { 1756 crq.request_capability.capability = 1757 cpu_to_be16(PROMISC_REQUESTED); 1758 crq.request_capability.number = cpu_to_be64(1); 1759 atomic_inc(&adapter->running_cap_crqs); 1760 ibmvnic_send_crq(adapter, &crq); 1761 } 1762 } else { 1763 crq.request_capability.capability = 1764 cpu_to_be16(PROMISC_REQUESTED); 1765 crq.request_capability.number = cpu_to_be64(0); 1766 atomic_inc(&adapter->running_cap_crqs); 1767 ibmvnic_send_crq(adapter, &crq); 1768 } 1769 1770 kfree(allqueues); 1771 1772 return; 1773 1774 rx_failed: 1775 kfree(adapter->tx_scrq); 1776 adapter->tx_scrq = NULL; 1777 tx_failed: 1778 for (i = 0; i < registered_queues; i++) 1779 release_sub_crq_queue(adapter, allqueues[i]); 1780 kfree(allqueues); 1781 allqueues_failed: 1782 ibmvnic_remove(adapter->vdev); 1783 } 1784 1785 static int pending_scrq(struct ibmvnic_adapter *adapter, 1786 struct ibmvnic_sub_crq_queue *scrq) 1787 { 1788 union sub_crq *entry = &scrq->msgs[scrq->cur]; 1789 1790 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing) 1791 return 1; 1792 else 1793 return 0; 1794 } 1795 1796 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 1797 struct ibmvnic_sub_crq_queue *scrq) 1798 { 1799 union sub_crq *entry; 1800 unsigned long flags; 1801 1802 spin_lock_irqsave(&scrq->lock, flags); 1803 entry = &scrq->msgs[scrq->cur]; 1804 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1805 if (++scrq->cur == scrq->size) 1806 scrq->cur = 0; 1807 } else { 1808 entry = NULL; 1809 } 1810 spin_unlock_irqrestore(&scrq->lock, flags); 1811 1812 return entry; 1813 } 1814 1815 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 1816 { 1817 struct ibmvnic_crq_queue *queue = &adapter->crq; 1818 union ibmvnic_crq *crq; 1819 1820 crq = &queue->msgs[queue->cur]; 1821 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1822 if (++queue->cur == queue->size) 1823 queue->cur = 0; 1824 } else { 1825 crq = NULL; 1826 } 1827 1828 return crq; 1829 } 1830 1831 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 1832 union sub_crq *sub_crq) 1833 { 1834 unsigned int ua = adapter->vdev->unit_address; 1835 struct device *dev = &adapter->vdev->dev; 1836 u64 *u64_crq = (u64 *)sub_crq; 1837 int rc; 1838 1839 netdev_dbg(adapter->netdev, 1840 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 1841 (unsigned long int)cpu_to_be64(remote_handle), 1842 (unsigned long int)cpu_to_be64(u64_crq[0]), 1843 (unsigned long int)cpu_to_be64(u64_crq[1]), 1844 (unsigned long int)cpu_to_be64(u64_crq[2]), 1845 (unsigned long int)cpu_to_be64(u64_crq[3])); 1846 1847 /* Make sure the hypervisor sees the complete request */ 1848 mb(); 1849 1850 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 1851 cpu_to_be64(remote_handle), 1852 cpu_to_be64(u64_crq[0]), 1853 cpu_to_be64(u64_crq[1]), 1854 cpu_to_be64(u64_crq[2]), 1855 cpu_to_be64(u64_crq[3])); 1856 1857 if (rc) { 1858 if (rc == H_CLOSED) 1859 dev_warn(dev, "CRQ Queue closed\n"); 1860 dev_err(dev, "Send error (rc=%d)\n", rc); 1861 } 1862 1863 return rc; 1864 } 1865 1866 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 1867 u64 remote_handle, u64 ioba, u64 num_entries) 1868 { 1869 unsigned int ua = adapter->vdev->unit_address; 1870 struct device *dev = &adapter->vdev->dev; 1871 int rc; 1872 1873 /* Make sure the hypervisor sees the complete request */ 1874 mb(); 1875 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 1876 cpu_to_be64(remote_handle), 1877 ioba, num_entries); 1878 1879 if (rc) { 1880 if (rc == H_CLOSED) 1881 dev_warn(dev, "CRQ Queue closed\n"); 1882 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 1883 } 1884 1885 return rc; 1886 } 1887 1888 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 1889 union ibmvnic_crq *crq) 1890 { 1891 unsigned int ua = adapter->vdev->unit_address; 1892 struct device *dev = &adapter->vdev->dev; 1893 u64 *u64_crq = (u64 *)crq; 1894 int rc; 1895 1896 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 1897 (unsigned long int)cpu_to_be64(u64_crq[0]), 1898 (unsigned long int)cpu_to_be64(u64_crq[1])); 1899 1900 /* Make sure the hypervisor sees the complete request */ 1901 mb(); 1902 1903 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 1904 cpu_to_be64(u64_crq[0]), 1905 cpu_to_be64(u64_crq[1])); 1906 1907 if (rc) { 1908 if (rc == H_CLOSED) 1909 dev_warn(dev, "CRQ Queue closed\n"); 1910 dev_warn(dev, "Send error (rc=%d)\n", rc); 1911 } 1912 1913 return rc; 1914 } 1915 1916 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 1917 { 1918 union ibmvnic_crq crq; 1919 1920 memset(&crq, 0, sizeof(crq)); 1921 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 1922 crq.generic.cmd = IBMVNIC_CRQ_INIT; 1923 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 1924 1925 return ibmvnic_send_crq(adapter, &crq); 1926 } 1927 1928 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter) 1929 { 1930 union ibmvnic_crq crq; 1931 1932 memset(&crq, 0, sizeof(crq)); 1933 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 1934 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 1935 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n"); 1936 1937 return ibmvnic_send_crq(adapter, &crq); 1938 } 1939 1940 static int send_version_xchg(struct ibmvnic_adapter *adapter) 1941 { 1942 union ibmvnic_crq crq; 1943 1944 memset(&crq, 0, sizeof(crq)); 1945 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 1946 crq.version_exchange.cmd = VERSION_EXCHANGE; 1947 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 1948 1949 return ibmvnic_send_crq(adapter, &crq); 1950 } 1951 1952 static void send_login(struct ibmvnic_adapter *adapter) 1953 { 1954 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 1955 struct ibmvnic_login_buffer *login_buffer; 1956 struct ibmvnic_inflight_cmd *inflight_cmd; 1957 struct device *dev = &adapter->vdev->dev; 1958 dma_addr_t rsp_buffer_token; 1959 dma_addr_t buffer_token; 1960 size_t rsp_buffer_size; 1961 union ibmvnic_crq crq; 1962 unsigned long flags; 1963 size_t buffer_size; 1964 __be64 *tx_list_p; 1965 __be64 *rx_list_p; 1966 int i; 1967 1968 buffer_size = 1969 sizeof(struct ibmvnic_login_buffer) + 1970 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); 1971 1972 login_buffer = kmalloc(buffer_size, GFP_ATOMIC); 1973 if (!login_buffer) 1974 goto buf_alloc_failed; 1975 1976 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 1977 DMA_TO_DEVICE); 1978 if (dma_mapping_error(dev, buffer_token)) { 1979 dev_err(dev, "Couldn't map login buffer\n"); 1980 goto buf_map_failed; 1981 } 1982 1983 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 1984 sizeof(u64) * adapter->req_tx_queues + 1985 sizeof(u64) * adapter->req_rx_queues + 1986 sizeof(u64) * adapter->req_rx_queues + 1987 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 1988 1989 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 1990 if (!login_rsp_buffer) 1991 goto buf_rsp_alloc_failed; 1992 1993 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 1994 rsp_buffer_size, DMA_FROM_DEVICE); 1995 if (dma_mapping_error(dev, rsp_buffer_token)) { 1996 dev_err(dev, "Couldn't map login rsp buffer\n"); 1997 goto buf_rsp_map_failed; 1998 } 1999 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 2000 if (!inflight_cmd) { 2001 dev_err(dev, "Couldn't allocate inflight_cmd\n"); 2002 goto inflight_alloc_failed; 2003 } 2004 adapter->login_buf = login_buffer; 2005 adapter->login_buf_token = buffer_token; 2006 adapter->login_buf_sz = buffer_size; 2007 adapter->login_rsp_buf = login_rsp_buffer; 2008 adapter->login_rsp_buf_token = rsp_buffer_token; 2009 adapter->login_rsp_buf_sz = rsp_buffer_size; 2010 2011 login_buffer->len = cpu_to_be32(buffer_size); 2012 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 2013 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 2014 login_buffer->off_txcomp_subcrqs = 2015 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 2016 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 2017 login_buffer->off_rxcomp_subcrqs = 2018 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 2019 sizeof(u64) * adapter->req_tx_queues); 2020 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 2021 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 2022 2023 tx_list_p = (__be64 *)((char *)login_buffer + 2024 sizeof(struct ibmvnic_login_buffer)); 2025 rx_list_p = (__be64 *)((char *)login_buffer + 2026 sizeof(struct ibmvnic_login_buffer) + 2027 sizeof(u64) * adapter->req_tx_queues); 2028 2029 for (i = 0; i < adapter->req_tx_queues; i++) { 2030 if (adapter->tx_scrq[i]) { 2031 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 2032 crq_num); 2033 } 2034 } 2035 2036 for (i = 0; i < adapter->req_rx_queues; i++) { 2037 if (adapter->rx_scrq[i]) { 2038 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 2039 crq_num); 2040 } 2041 } 2042 2043 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 2044 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 2045 netdev_dbg(adapter->netdev, "%016lx\n", 2046 ((unsigned long int *)(adapter->login_buf))[i]); 2047 } 2048 2049 memset(&crq, 0, sizeof(crq)); 2050 crq.login.first = IBMVNIC_CRQ_CMD; 2051 crq.login.cmd = LOGIN; 2052 crq.login.ioba = cpu_to_be32(buffer_token); 2053 crq.login.len = cpu_to_be32(buffer_size); 2054 2055 memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); 2056 2057 spin_lock_irqsave(&adapter->inflight_lock, flags); 2058 list_add_tail(&inflight_cmd->list, &adapter->inflight); 2059 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 2060 2061 ibmvnic_send_crq(adapter, &crq); 2062 2063 return; 2064 2065 inflight_alloc_failed: 2066 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, 2067 DMA_FROM_DEVICE); 2068 buf_rsp_map_failed: 2069 kfree(login_rsp_buffer); 2070 buf_rsp_alloc_failed: 2071 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 2072 buf_map_failed: 2073 kfree(login_buffer); 2074 buf_alloc_failed: 2075 return; 2076 } 2077 2078 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 2079 u32 len, u8 map_id) 2080 { 2081 union ibmvnic_crq crq; 2082 2083 memset(&crq, 0, sizeof(crq)); 2084 crq.request_map.first = IBMVNIC_CRQ_CMD; 2085 crq.request_map.cmd = REQUEST_MAP; 2086 crq.request_map.map_id = map_id; 2087 crq.request_map.ioba = cpu_to_be32(addr); 2088 crq.request_map.len = cpu_to_be32(len); 2089 ibmvnic_send_crq(adapter, &crq); 2090 } 2091 2092 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 2093 { 2094 union ibmvnic_crq crq; 2095 2096 memset(&crq, 0, sizeof(crq)); 2097 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 2098 crq.request_unmap.cmd = REQUEST_UNMAP; 2099 crq.request_unmap.map_id = map_id; 2100 ibmvnic_send_crq(adapter, &crq); 2101 } 2102 2103 static void send_map_query(struct ibmvnic_adapter *adapter) 2104 { 2105 union ibmvnic_crq crq; 2106 2107 memset(&crq, 0, sizeof(crq)); 2108 crq.query_map.first = IBMVNIC_CRQ_CMD; 2109 crq.query_map.cmd = QUERY_MAP; 2110 ibmvnic_send_crq(adapter, &crq); 2111 } 2112 2113 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 2114 static void send_cap_queries(struct ibmvnic_adapter *adapter) 2115 { 2116 union ibmvnic_crq crq; 2117 2118 atomic_set(&adapter->running_cap_crqs, 0); 2119 memset(&crq, 0, sizeof(crq)); 2120 crq.query_capability.first = IBMVNIC_CRQ_CMD; 2121 crq.query_capability.cmd = QUERY_CAPABILITY; 2122 2123 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 2124 atomic_inc(&adapter->running_cap_crqs); 2125 ibmvnic_send_crq(adapter, &crq); 2126 2127 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 2128 atomic_inc(&adapter->running_cap_crqs); 2129 ibmvnic_send_crq(adapter, &crq); 2130 2131 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 2132 atomic_inc(&adapter->running_cap_crqs); 2133 ibmvnic_send_crq(adapter, &crq); 2134 2135 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 2136 atomic_inc(&adapter->running_cap_crqs); 2137 ibmvnic_send_crq(adapter, &crq); 2138 2139 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 2140 atomic_inc(&adapter->running_cap_crqs); 2141 ibmvnic_send_crq(adapter, &crq); 2142 2143 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 2144 atomic_inc(&adapter->running_cap_crqs); 2145 ibmvnic_send_crq(adapter, &crq); 2146 2147 crq.query_capability.capability = 2148 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 2149 atomic_inc(&adapter->running_cap_crqs); 2150 ibmvnic_send_crq(adapter, &crq); 2151 2152 crq.query_capability.capability = 2153 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 2154 atomic_inc(&adapter->running_cap_crqs); 2155 ibmvnic_send_crq(adapter, &crq); 2156 2157 crq.query_capability.capability = 2158 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 2159 atomic_inc(&adapter->running_cap_crqs); 2160 ibmvnic_send_crq(adapter, &crq); 2161 2162 crq.query_capability.capability = 2163 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 2164 atomic_inc(&adapter->running_cap_crqs); 2165 ibmvnic_send_crq(adapter, &crq); 2166 2167 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 2168 atomic_inc(&adapter->running_cap_crqs); 2169 ibmvnic_send_crq(adapter, &crq); 2170 2171 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 2172 atomic_inc(&adapter->running_cap_crqs); 2173 ibmvnic_send_crq(adapter, &crq); 2174 2175 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 2176 atomic_inc(&adapter->running_cap_crqs); 2177 ibmvnic_send_crq(adapter, &crq); 2178 2179 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 2180 atomic_inc(&adapter->running_cap_crqs); 2181 ibmvnic_send_crq(adapter, &crq); 2182 2183 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 2184 atomic_inc(&adapter->running_cap_crqs); 2185 ibmvnic_send_crq(adapter, &crq); 2186 2187 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 2188 atomic_inc(&adapter->running_cap_crqs); 2189 ibmvnic_send_crq(adapter, &crq); 2190 2191 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 2192 atomic_inc(&adapter->running_cap_crqs); 2193 ibmvnic_send_crq(adapter, &crq); 2194 2195 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 2196 atomic_inc(&adapter->running_cap_crqs); 2197 ibmvnic_send_crq(adapter, &crq); 2198 2199 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 2200 atomic_inc(&adapter->running_cap_crqs); 2201 ibmvnic_send_crq(adapter, &crq); 2202 2203 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 2204 atomic_inc(&adapter->running_cap_crqs); 2205 ibmvnic_send_crq(adapter, &crq); 2206 2207 crq.query_capability.capability = 2208 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 2209 atomic_inc(&adapter->running_cap_crqs); 2210 ibmvnic_send_crq(adapter, &crq); 2211 2212 crq.query_capability.capability = 2213 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 2214 atomic_inc(&adapter->running_cap_crqs); 2215 ibmvnic_send_crq(adapter, &crq); 2216 2217 crq.query_capability.capability = 2218 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 2219 atomic_inc(&adapter->running_cap_crqs); 2220 ibmvnic_send_crq(adapter, &crq); 2221 2222 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 2223 atomic_inc(&adapter->running_cap_crqs); 2224 ibmvnic_send_crq(adapter, &crq); 2225 } 2226 2227 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 2228 { 2229 struct device *dev = &adapter->vdev->dev; 2230 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 2231 union ibmvnic_crq crq; 2232 int i; 2233 2234 dma_unmap_single(dev, adapter->ip_offload_tok, 2235 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 2236 2237 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 2238 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 2239 netdev_dbg(adapter->netdev, "%016lx\n", 2240 ((unsigned long int *)(buf))[i]); 2241 2242 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 2243 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 2244 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 2245 buf->tcp_ipv4_chksum); 2246 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 2247 buf->tcp_ipv6_chksum); 2248 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 2249 buf->udp_ipv4_chksum); 2250 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 2251 buf->udp_ipv6_chksum); 2252 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 2253 buf->large_tx_ipv4); 2254 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 2255 buf->large_tx_ipv6); 2256 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 2257 buf->large_rx_ipv4); 2258 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 2259 buf->large_rx_ipv6); 2260 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 2261 buf->max_ipv4_header_size); 2262 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 2263 buf->max_ipv6_header_size); 2264 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 2265 buf->max_tcp_header_size); 2266 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 2267 buf->max_udp_header_size); 2268 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 2269 buf->max_large_tx_size); 2270 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 2271 buf->max_large_rx_size); 2272 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 2273 buf->ipv6_extension_header); 2274 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 2275 buf->tcp_pseudosum_req); 2276 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 2277 buf->num_ipv6_ext_headers); 2278 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 2279 buf->off_ipv6_ext_headers); 2280 2281 adapter->ip_offload_ctrl_tok = 2282 dma_map_single(dev, &adapter->ip_offload_ctrl, 2283 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 2284 2285 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 2286 dev_err(dev, "Couldn't map ip offload control buffer\n"); 2287 return; 2288 } 2289 2290 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 2291 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 2292 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 2293 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 2294 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 2295 2296 /* large_tx/rx disabled for now, additional features needed */ 2297 adapter->ip_offload_ctrl.large_tx_ipv4 = 0; 2298 adapter->ip_offload_ctrl.large_tx_ipv6 = 0; 2299 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 2300 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 2301 2302 adapter->netdev->features = NETIF_F_GSO; 2303 2304 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 2305 adapter->netdev->features |= NETIF_F_IP_CSUM; 2306 2307 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 2308 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 2309 2310 if ((adapter->netdev->features & 2311 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 2312 adapter->netdev->features |= NETIF_F_RXCSUM; 2313 2314 memset(&crq, 0, sizeof(crq)); 2315 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 2316 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 2317 crq.control_ip_offload.len = 2318 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 2319 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 2320 ibmvnic_send_crq(adapter, &crq); 2321 } 2322 2323 static void handle_error_info_rsp(union ibmvnic_crq *crq, 2324 struct ibmvnic_adapter *adapter) 2325 { 2326 struct device *dev = &adapter->vdev->dev; 2327 struct ibmvnic_error_buff *error_buff, *tmp; 2328 unsigned long flags; 2329 bool found = false; 2330 int i; 2331 2332 if (!crq->request_error_rsp.rc.code) { 2333 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 2334 crq->request_error_rsp.rc.code); 2335 return; 2336 } 2337 2338 spin_lock_irqsave(&adapter->error_list_lock, flags); 2339 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 2340 if (error_buff->error_id == crq->request_error_rsp.error_id) { 2341 found = true; 2342 list_del(&error_buff->list); 2343 break; 2344 } 2345 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2346 2347 if (!found) { 2348 dev_err(dev, "Couldn't find error id %x\n", 2349 be32_to_cpu(crq->request_error_rsp.error_id)); 2350 return; 2351 } 2352 2353 dev_err(dev, "Detailed info for error id %x:", 2354 be32_to_cpu(crq->request_error_rsp.error_id)); 2355 2356 for (i = 0; i < error_buff->len; i++) { 2357 pr_cont("%02x", (int)error_buff->buff[i]); 2358 if (i % 8 == 7) 2359 pr_cont(" "); 2360 } 2361 pr_cont("\n"); 2362 2363 dma_unmap_single(dev, error_buff->dma, error_buff->len, 2364 DMA_FROM_DEVICE); 2365 kfree(error_buff->buff); 2366 kfree(error_buff); 2367 } 2368 2369 static void handle_error_indication(union ibmvnic_crq *crq, 2370 struct ibmvnic_adapter *adapter) 2371 { 2372 int detail_len = be32_to_cpu(crq->error_indication.detail_error_sz); 2373 struct ibmvnic_inflight_cmd *inflight_cmd; 2374 struct device *dev = &adapter->vdev->dev; 2375 struct ibmvnic_error_buff *error_buff; 2376 union ibmvnic_crq new_crq; 2377 unsigned long flags; 2378 2379 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 2380 crq->error_indication. 2381 flags & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 2382 be32_to_cpu(crq->error_indication.error_id), 2383 be16_to_cpu(crq->error_indication.error_cause)); 2384 2385 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 2386 if (!error_buff) 2387 return; 2388 2389 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 2390 if (!error_buff->buff) { 2391 kfree(error_buff); 2392 return; 2393 } 2394 2395 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 2396 DMA_FROM_DEVICE); 2397 if (dma_mapping_error(dev, error_buff->dma)) { 2398 if (!firmware_has_feature(FW_FEATURE_CMO)) 2399 dev_err(dev, "Couldn't map error buffer\n"); 2400 kfree(error_buff->buff); 2401 kfree(error_buff); 2402 return; 2403 } 2404 2405 inflight_cmd = kmalloc(sizeof(*inflight_cmd), GFP_ATOMIC); 2406 if (!inflight_cmd) { 2407 dma_unmap_single(dev, error_buff->dma, detail_len, 2408 DMA_FROM_DEVICE); 2409 kfree(error_buff->buff); 2410 kfree(error_buff); 2411 return; 2412 } 2413 2414 error_buff->len = detail_len; 2415 error_buff->error_id = crq->error_indication.error_id; 2416 2417 spin_lock_irqsave(&adapter->error_list_lock, flags); 2418 list_add_tail(&error_buff->list, &adapter->errors); 2419 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2420 2421 memset(&new_crq, 0, sizeof(new_crq)); 2422 new_crq.request_error_info.first = IBMVNIC_CRQ_CMD; 2423 new_crq.request_error_info.cmd = REQUEST_ERROR_INFO; 2424 new_crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 2425 new_crq.request_error_info.len = cpu_to_be32(detail_len); 2426 new_crq.request_error_info.error_id = crq->error_indication.error_id; 2427 2428 memcpy(&inflight_cmd->crq, &crq, sizeof(crq)); 2429 2430 spin_lock_irqsave(&adapter->inflight_lock, flags); 2431 list_add_tail(&inflight_cmd->list, &adapter->inflight); 2432 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 2433 2434 ibmvnic_send_crq(adapter, &new_crq); 2435 } 2436 2437 static void handle_change_mac_rsp(union ibmvnic_crq *crq, 2438 struct ibmvnic_adapter *adapter) 2439 { 2440 struct net_device *netdev = adapter->netdev; 2441 struct device *dev = &adapter->vdev->dev; 2442 long rc; 2443 2444 rc = crq->change_mac_addr_rsp.rc.code; 2445 if (rc) { 2446 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 2447 return; 2448 } 2449 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 2450 ETH_ALEN); 2451 } 2452 2453 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 2454 struct ibmvnic_adapter *adapter) 2455 { 2456 struct device *dev = &adapter->vdev->dev; 2457 u64 *req_value; 2458 char *name; 2459 2460 atomic_dec(&adapter->running_cap_crqs); 2461 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 2462 case REQ_TX_QUEUES: 2463 req_value = &adapter->req_tx_queues; 2464 name = "tx"; 2465 break; 2466 case REQ_RX_QUEUES: 2467 req_value = &adapter->req_rx_queues; 2468 name = "rx"; 2469 break; 2470 case REQ_RX_ADD_QUEUES: 2471 req_value = &adapter->req_rx_add_queues; 2472 name = "rx_add"; 2473 break; 2474 case REQ_TX_ENTRIES_PER_SUBCRQ: 2475 req_value = &adapter->req_tx_entries_per_subcrq; 2476 name = "tx_entries_per_subcrq"; 2477 break; 2478 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 2479 req_value = &adapter->req_rx_add_entries_per_subcrq; 2480 name = "rx_add_entries_per_subcrq"; 2481 break; 2482 case REQ_MTU: 2483 req_value = &adapter->req_mtu; 2484 name = "mtu"; 2485 break; 2486 case PROMISC_REQUESTED: 2487 req_value = &adapter->promisc; 2488 name = "promisc"; 2489 break; 2490 default: 2491 dev_err(dev, "Got invalid cap request rsp %d\n", 2492 crq->request_capability.capability); 2493 return; 2494 } 2495 2496 switch (crq->request_capability_rsp.rc.code) { 2497 case SUCCESS: 2498 break; 2499 case PARTIALSUCCESS: 2500 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 2501 *req_value, 2502 (long int)be64_to_cpu(crq->request_capability_rsp. 2503 number), name); 2504 release_sub_crqs(adapter); 2505 *req_value = be64_to_cpu(crq->request_capability_rsp.number); 2506 init_sub_crqs(adapter, 1); 2507 return; 2508 default: 2509 dev_err(dev, "Error %d in request cap rsp\n", 2510 crq->request_capability_rsp.rc.code); 2511 return; 2512 } 2513 2514 /* Done receiving requested capabilities, query IP offload support */ 2515 if (atomic_read(&adapter->running_cap_crqs) == 0) { 2516 union ibmvnic_crq newcrq; 2517 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 2518 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 2519 &adapter->ip_offload_buf; 2520 2521 adapter->wait_capability = false; 2522 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 2523 buf_sz, 2524 DMA_FROM_DEVICE); 2525 2526 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 2527 if (!firmware_has_feature(FW_FEATURE_CMO)) 2528 dev_err(dev, "Couldn't map offload buffer\n"); 2529 return; 2530 } 2531 2532 memset(&newcrq, 0, sizeof(newcrq)); 2533 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 2534 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 2535 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 2536 newcrq.query_ip_offload.ioba = 2537 cpu_to_be32(adapter->ip_offload_tok); 2538 2539 ibmvnic_send_crq(adapter, &newcrq); 2540 } 2541 } 2542 2543 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 2544 struct ibmvnic_adapter *adapter) 2545 { 2546 struct device *dev = &adapter->vdev->dev; 2547 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 2548 struct ibmvnic_login_buffer *login = adapter->login_buf; 2549 int i; 2550 2551 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 2552 DMA_BIDIRECTIONAL); 2553 dma_unmap_single(dev, adapter->login_rsp_buf_token, 2554 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 2555 2556 /* If the number of queues requested can't be allocated by the 2557 * server, the login response will return with code 1. We will need 2558 * to resend the login buffer with fewer queues requested. 2559 */ 2560 if (login_rsp_crq->generic.rc.code) { 2561 adapter->renegotiate = true; 2562 complete(&adapter->init_done); 2563 return 0; 2564 } 2565 2566 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 2567 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 2568 netdev_dbg(adapter->netdev, "%016lx\n", 2569 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 2570 } 2571 2572 /* Sanity checks */ 2573 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 2574 (be32_to_cpu(login->num_rxcomp_subcrqs) * 2575 adapter->req_rx_add_queues != 2576 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 2577 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 2578 ibmvnic_remove(adapter->vdev); 2579 return -EIO; 2580 } 2581 complete(&adapter->init_done); 2582 2583 return 0; 2584 } 2585 2586 static void handle_request_map_rsp(union ibmvnic_crq *crq, 2587 struct ibmvnic_adapter *adapter) 2588 { 2589 struct device *dev = &adapter->vdev->dev; 2590 u8 map_id = crq->request_map_rsp.map_id; 2591 int tx_subcrqs; 2592 int rx_subcrqs; 2593 long rc; 2594 int i; 2595 2596 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 2597 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 2598 2599 rc = crq->request_map_rsp.rc.code; 2600 if (rc) { 2601 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc); 2602 adapter->map_id--; 2603 /* need to find and zero tx/rx_pool map_id */ 2604 for (i = 0; i < tx_subcrqs; i++) { 2605 if (adapter->tx_pool[i].long_term_buff.map_id == map_id) 2606 adapter->tx_pool[i].long_term_buff.map_id = 0; 2607 } 2608 for (i = 0; i < rx_subcrqs; i++) { 2609 if (adapter->rx_pool[i].long_term_buff.map_id == map_id) 2610 adapter->rx_pool[i].long_term_buff.map_id = 0; 2611 } 2612 } 2613 complete(&adapter->fw_done); 2614 } 2615 2616 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 2617 struct ibmvnic_adapter *adapter) 2618 { 2619 struct device *dev = &adapter->vdev->dev; 2620 long rc; 2621 2622 rc = crq->request_unmap_rsp.rc.code; 2623 if (rc) 2624 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 2625 } 2626 2627 static void handle_query_map_rsp(union ibmvnic_crq *crq, 2628 struct ibmvnic_adapter *adapter) 2629 { 2630 struct net_device *netdev = adapter->netdev; 2631 struct device *dev = &adapter->vdev->dev; 2632 long rc; 2633 2634 rc = crq->query_map_rsp.rc.code; 2635 if (rc) { 2636 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 2637 return; 2638 } 2639 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 2640 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 2641 crq->query_map_rsp.free_pages); 2642 } 2643 2644 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 2645 struct ibmvnic_adapter *adapter) 2646 { 2647 struct net_device *netdev = adapter->netdev; 2648 struct device *dev = &adapter->vdev->dev; 2649 long rc; 2650 2651 atomic_dec(&adapter->running_cap_crqs); 2652 netdev_dbg(netdev, "Outstanding queries: %d\n", 2653 atomic_read(&adapter->running_cap_crqs)); 2654 rc = crq->query_capability.rc.code; 2655 if (rc) { 2656 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 2657 goto out; 2658 } 2659 2660 switch (be16_to_cpu(crq->query_capability.capability)) { 2661 case MIN_TX_QUEUES: 2662 adapter->min_tx_queues = 2663 be64_to_cpu(crq->query_capability.number); 2664 netdev_dbg(netdev, "min_tx_queues = %lld\n", 2665 adapter->min_tx_queues); 2666 break; 2667 case MIN_RX_QUEUES: 2668 adapter->min_rx_queues = 2669 be64_to_cpu(crq->query_capability.number); 2670 netdev_dbg(netdev, "min_rx_queues = %lld\n", 2671 adapter->min_rx_queues); 2672 break; 2673 case MIN_RX_ADD_QUEUES: 2674 adapter->min_rx_add_queues = 2675 be64_to_cpu(crq->query_capability.number); 2676 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 2677 adapter->min_rx_add_queues); 2678 break; 2679 case MAX_TX_QUEUES: 2680 adapter->max_tx_queues = 2681 be64_to_cpu(crq->query_capability.number); 2682 netdev_dbg(netdev, "max_tx_queues = %lld\n", 2683 adapter->max_tx_queues); 2684 break; 2685 case MAX_RX_QUEUES: 2686 adapter->max_rx_queues = 2687 be64_to_cpu(crq->query_capability.number); 2688 netdev_dbg(netdev, "max_rx_queues = %lld\n", 2689 adapter->max_rx_queues); 2690 break; 2691 case MAX_RX_ADD_QUEUES: 2692 adapter->max_rx_add_queues = 2693 be64_to_cpu(crq->query_capability.number); 2694 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 2695 adapter->max_rx_add_queues); 2696 break; 2697 case MIN_TX_ENTRIES_PER_SUBCRQ: 2698 adapter->min_tx_entries_per_subcrq = 2699 be64_to_cpu(crq->query_capability.number); 2700 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 2701 adapter->min_tx_entries_per_subcrq); 2702 break; 2703 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 2704 adapter->min_rx_add_entries_per_subcrq = 2705 be64_to_cpu(crq->query_capability.number); 2706 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 2707 adapter->min_rx_add_entries_per_subcrq); 2708 break; 2709 case MAX_TX_ENTRIES_PER_SUBCRQ: 2710 adapter->max_tx_entries_per_subcrq = 2711 be64_to_cpu(crq->query_capability.number); 2712 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 2713 adapter->max_tx_entries_per_subcrq); 2714 break; 2715 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 2716 adapter->max_rx_add_entries_per_subcrq = 2717 be64_to_cpu(crq->query_capability.number); 2718 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 2719 adapter->max_rx_add_entries_per_subcrq); 2720 break; 2721 case TCP_IP_OFFLOAD: 2722 adapter->tcp_ip_offload = 2723 be64_to_cpu(crq->query_capability.number); 2724 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 2725 adapter->tcp_ip_offload); 2726 break; 2727 case PROMISC_SUPPORTED: 2728 adapter->promisc_supported = 2729 be64_to_cpu(crq->query_capability.number); 2730 netdev_dbg(netdev, "promisc_supported = %lld\n", 2731 adapter->promisc_supported); 2732 break; 2733 case MIN_MTU: 2734 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 2735 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 2736 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 2737 break; 2738 case MAX_MTU: 2739 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 2740 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 2741 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 2742 break; 2743 case MAX_MULTICAST_FILTERS: 2744 adapter->max_multicast_filters = 2745 be64_to_cpu(crq->query_capability.number); 2746 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 2747 adapter->max_multicast_filters); 2748 break; 2749 case VLAN_HEADER_INSERTION: 2750 adapter->vlan_header_insertion = 2751 be64_to_cpu(crq->query_capability.number); 2752 if (adapter->vlan_header_insertion) 2753 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 2754 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 2755 adapter->vlan_header_insertion); 2756 break; 2757 case MAX_TX_SG_ENTRIES: 2758 adapter->max_tx_sg_entries = 2759 be64_to_cpu(crq->query_capability.number); 2760 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 2761 adapter->max_tx_sg_entries); 2762 break; 2763 case RX_SG_SUPPORTED: 2764 adapter->rx_sg_supported = 2765 be64_to_cpu(crq->query_capability.number); 2766 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 2767 adapter->rx_sg_supported); 2768 break; 2769 case OPT_TX_COMP_SUB_QUEUES: 2770 adapter->opt_tx_comp_sub_queues = 2771 be64_to_cpu(crq->query_capability.number); 2772 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 2773 adapter->opt_tx_comp_sub_queues); 2774 break; 2775 case OPT_RX_COMP_QUEUES: 2776 adapter->opt_rx_comp_queues = 2777 be64_to_cpu(crq->query_capability.number); 2778 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 2779 adapter->opt_rx_comp_queues); 2780 break; 2781 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 2782 adapter->opt_rx_bufadd_q_per_rx_comp_q = 2783 be64_to_cpu(crq->query_capability.number); 2784 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 2785 adapter->opt_rx_bufadd_q_per_rx_comp_q); 2786 break; 2787 case OPT_TX_ENTRIES_PER_SUBCRQ: 2788 adapter->opt_tx_entries_per_subcrq = 2789 be64_to_cpu(crq->query_capability.number); 2790 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 2791 adapter->opt_tx_entries_per_subcrq); 2792 break; 2793 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 2794 adapter->opt_rxba_entries_per_subcrq = 2795 be64_to_cpu(crq->query_capability.number); 2796 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 2797 adapter->opt_rxba_entries_per_subcrq); 2798 break; 2799 case TX_RX_DESC_REQ: 2800 adapter->tx_rx_desc_req = crq->query_capability.number; 2801 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 2802 adapter->tx_rx_desc_req); 2803 break; 2804 2805 default: 2806 netdev_err(netdev, "Got invalid cap rsp %d\n", 2807 crq->query_capability.capability); 2808 } 2809 2810 out: 2811 if (atomic_read(&adapter->running_cap_crqs) == 0) { 2812 adapter->wait_capability = false; 2813 init_sub_crqs(adapter, 0); 2814 /* We're done querying the capabilities, initialize sub-crqs */ 2815 } 2816 } 2817 2818 static void ibmvnic_free_inflight(struct ibmvnic_adapter *adapter) 2819 { 2820 struct ibmvnic_inflight_cmd *inflight_cmd, *tmp1; 2821 struct device *dev = &adapter->vdev->dev; 2822 struct ibmvnic_error_buff *error_buff, *tmp2; 2823 unsigned long flags; 2824 unsigned long flags2; 2825 2826 spin_lock_irqsave(&adapter->inflight_lock, flags); 2827 list_for_each_entry_safe(inflight_cmd, tmp1, &adapter->inflight, list) { 2828 switch (inflight_cmd->crq.generic.cmd) { 2829 case LOGIN: 2830 dma_unmap_single(dev, adapter->login_buf_token, 2831 adapter->login_buf_sz, 2832 DMA_BIDIRECTIONAL); 2833 dma_unmap_single(dev, adapter->login_rsp_buf_token, 2834 adapter->login_rsp_buf_sz, 2835 DMA_BIDIRECTIONAL); 2836 kfree(adapter->login_rsp_buf); 2837 kfree(adapter->login_buf); 2838 break; 2839 case REQUEST_ERROR_INFO: 2840 spin_lock_irqsave(&adapter->error_list_lock, flags2); 2841 list_for_each_entry_safe(error_buff, tmp2, 2842 &adapter->errors, list) { 2843 dma_unmap_single(dev, error_buff->dma, 2844 error_buff->len, 2845 DMA_FROM_DEVICE); 2846 kfree(error_buff->buff); 2847 list_del(&error_buff->list); 2848 kfree(error_buff); 2849 } 2850 spin_unlock_irqrestore(&adapter->error_list_lock, 2851 flags2); 2852 break; 2853 } 2854 list_del(&inflight_cmd->list); 2855 kfree(inflight_cmd); 2856 } 2857 spin_unlock_irqrestore(&adapter->inflight_lock, flags); 2858 } 2859 2860 static void ibmvnic_xport_event(struct work_struct *work) 2861 { 2862 struct ibmvnic_adapter *adapter = container_of(work, 2863 struct ibmvnic_adapter, 2864 ibmvnic_xport); 2865 struct device *dev = &adapter->vdev->dev; 2866 long rc; 2867 2868 ibmvnic_free_inflight(adapter); 2869 release_sub_crqs(adapter); 2870 if (adapter->migrated) { 2871 rc = ibmvnic_reenable_crq_queue(adapter); 2872 if (rc) 2873 dev_err(dev, "Error after enable rc=%ld\n", rc); 2874 adapter->migrated = false; 2875 rc = ibmvnic_send_crq_init(adapter); 2876 if (rc) 2877 dev_err(dev, "Error sending init rc=%ld\n", rc); 2878 } 2879 } 2880 2881 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 2882 struct ibmvnic_adapter *adapter) 2883 { 2884 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 2885 struct net_device *netdev = adapter->netdev; 2886 struct device *dev = &adapter->vdev->dev; 2887 long rc; 2888 2889 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 2890 ((unsigned long int *)crq)[0], 2891 ((unsigned long int *)crq)[1]); 2892 switch (gen_crq->first) { 2893 case IBMVNIC_CRQ_INIT_RSP: 2894 switch (gen_crq->cmd) { 2895 case IBMVNIC_CRQ_INIT: 2896 dev_info(dev, "Partner initialized\n"); 2897 /* Send back a response */ 2898 rc = ibmvnic_send_crq_init_complete(adapter); 2899 if (!rc) 2900 schedule_work(&adapter->vnic_crq_init); 2901 else 2902 dev_err(dev, "Can't send initrsp rc=%ld\n", rc); 2903 break; 2904 case IBMVNIC_CRQ_INIT_COMPLETE: 2905 dev_info(dev, "Partner initialization complete\n"); 2906 send_version_xchg(adapter); 2907 break; 2908 default: 2909 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 2910 } 2911 return; 2912 case IBMVNIC_CRQ_XPORT_EVENT: 2913 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 2914 dev_info(dev, "Re-enabling adapter\n"); 2915 adapter->migrated = true; 2916 schedule_work(&adapter->ibmvnic_xport); 2917 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 2918 dev_info(dev, "Backing device failover detected\n"); 2919 netif_carrier_off(netdev); 2920 adapter->failover = true; 2921 } else { 2922 /* The adapter lost the connection */ 2923 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 2924 gen_crq->cmd); 2925 schedule_work(&adapter->ibmvnic_xport); 2926 } 2927 return; 2928 case IBMVNIC_CRQ_CMD_RSP: 2929 break; 2930 default: 2931 dev_err(dev, "Got an invalid msg type 0x%02x\n", 2932 gen_crq->first); 2933 return; 2934 } 2935 2936 switch (gen_crq->cmd) { 2937 case VERSION_EXCHANGE_RSP: 2938 rc = crq->version_exchange_rsp.rc.code; 2939 if (rc) { 2940 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 2941 break; 2942 } 2943 dev_info(dev, "Partner protocol version is %d\n", 2944 crq->version_exchange_rsp.version); 2945 if (be16_to_cpu(crq->version_exchange_rsp.version) < 2946 ibmvnic_version) 2947 ibmvnic_version = 2948 be16_to_cpu(crq->version_exchange_rsp.version); 2949 send_cap_queries(adapter); 2950 break; 2951 case QUERY_CAPABILITY_RSP: 2952 handle_query_cap_rsp(crq, adapter); 2953 break; 2954 case QUERY_MAP_RSP: 2955 handle_query_map_rsp(crq, adapter); 2956 break; 2957 case REQUEST_MAP_RSP: 2958 handle_request_map_rsp(crq, adapter); 2959 break; 2960 case REQUEST_UNMAP_RSP: 2961 handle_request_unmap_rsp(crq, adapter); 2962 break; 2963 case REQUEST_CAPABILITY_RSP: 2964 handle_request_cap_rsp(crq, adapter); 2965 break; 2966 case LOGIN_RSP: 2967 netdev_dbg(netdev, "Got Login Response\n"); 2968 handle_login_rsp(crq, adapter); 2969 break; 2970 case LOGICAL_LINK_STATE_RSP: 2971 netdev_dbg(netdev, "Got Logical Link State Response\n"); 2972 adapter->logical_link_state = 2973 crq->logical_link_state_rsp.link_state; 2974 break; 2975 case LINK_STATE_INDICATION: 2976 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 2977 adapter->phys_link_state = 2978 crq->link_state_indication.phys_link_state; 2979 adapter->logical_link_state = 2980 crq->link_state_indication.logical_link_state; 2981 break; 2982 case CHANGE_MAC_ADDR_RSP: 2983 netdev_dbg(netdev, "Got MAC address change Response\n"); 2984 handle_change_mac_rsp(crq, adapter); 2985 break; 2986 case ERROR_INDICATION: 2987 netdev_dbg(netdev, "Got Error Indication\n"); 2988 handle_error_indication(crq, adapter); 2989 break; 2990 case REQUEST_ERROR_RSP: 2991 netdev_dbg(netdev, "Got Error Detail Response\n"); 2992 handle_error_info_rsp(crq, adapter); 2993 break; 2994 case REQUEST_STATISTICS_RSP: 2995 netdev_dbg(netdev, "Got Statistics Response\n"); 2996 complete(&adapter->stats_done); 2997 break; 2998 case QUERY_IP_OFFLOAD_RSP: 2999 netdev_dbg(netdev, "Got Query IP offload Response\n"); 3000 handle_query_ip_offload_rsp(adapter); 3001 break; 3002 case MULTICAST_CTRL_RSP: 3003 netdev_dbg(netdev, "Got multicast control Response\n"); 3004 break; 3005 case CONTROL_IP_OFFLOAD_RSP: 3006 netdev_dbg(netdev, "Got Control IP offload Response\n"); 3007 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 3008 sizeof(adapter->ip_offload_ctrl), 3009 DMA_TO_DEVICE); 3010 complete(&adapter->init_done); 3011 break; 3012 case COLLECT_FW_TRACE_RSP: 3013 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 3014 complete(&adapter->fw_done); 3015 break; 3016 default: 3017 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 3018 gen_crq->cmd); 3019 } 3020 } 3021 3022 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 3023 { 3024 struct ibmvnic_adapter *adapter = instance; 3025 unsigned long flags; 3026 3027 spin_lock_irqsave(&adapter->crq.lock, flags); 3028 vio_disable_interrupts(adapter->vdev); 3029 tasklet_schedule(&adapter->tasklet); 3030 spin_unlock_irqrestore(&adapter->crq.lock, flags); 3031 return IRQ_HANDLED; 3032 } 3033 3034 static void ibmvnic_tasklet(void *data) 3035 { 3036 struct ibmvnic_adapter *adapter = data; 3037 struct ibmvnic_crq_queue *queue = &adapter->crq; 3038 struct vio_dev *vdev = adapter->vdev; 3039 union ibmvnic_crq *crq; 3040 unsigned long flags; 3041 bool done = false; 3042 3043 spin_lock_irqsave(&queue->lock, flags); 3044 vio_disable_interrupts(vdev); 3045 while (!done) { 3046 /* Pull all the valid messages off the CRQ */ 3047 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 3048 ibmvnic_handle_crq(crq, adapter); 3049 crq->generic.first = 0; 3050 } 3051 vio_enable_interrupts(vdev); 3052 crq = ibmvnic_next_crq(adapter); 3053 if (crq) { 3054 vio_disable_interrupts(vdev); 3055 ibmvnic_handle_crq(crq, adapter); 3056 crq->generic.first = 0; 3057 } else { 3058 /* remain in tasklet until all 3059 * capabilities responses are received 3060 */ 3061 if (!adapter->wait_capability) 3062 done = true; 3063 } 3064 } 3065 /* if capabilities CRQ's were sent in this tasklet, the following 3066 * tasklet must wait until all responses are received 3067 */ 3068 if (atomic_read(&adapter->running_cap_crqs) != 0) 3069 adapter->wait_capability = true; 3070 spin_unlock_irqrestore(&queue->lock, flags); 3071 } 3072 3073 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 3074 { 3075 struct vio_dev *vdev = adapter->vdev; 3076 int rc; 3077 3078 do { 3079 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 3080 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3081 3082 if (rc) 3083 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 3084 3085 return rc; 3086 } 3087 3088 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 3089 { 3090 struct ibmvnic_crq_queue *crq = &adapter->crq; 3091 struct device *dev = &adapter->vdev->dev; 3092 struct vio_dev *vdev = adapter->vdev; 3093 int rc; 3094 3095 /* Close the CRQ */ 3096 do { 3097 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3098 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3099 3100 /* Clean out the queue */ 3101 memset(crq->msgs, 0, PAGE_SIZE); 3102 crq->cur = 0; 3103 3104 /* And re-open it again */ 3105 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3106 crq->msg_token, PAGE_SIZE); 3107 3108 if (rc == H_CLOSED) 3109 /* Adapter is good, but other end is not ready */ 3110 dev_warn(dev, "Partner adapter not ready\n"); 3111 else if (rc != 0) 3112 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 3113 3114 return rc; 3115 } 3116 3117 static void release_crq_queue(struct ibmvnic_adapter *adapter) 3118 { 3119 struct ibmvnic_crq_queue *crq = &adapter->crq; 3120 struct vio_dev *vdev = adapter->vdev; 3121 long rc; 3122 3123 if (!crq->msgs) 3124 return; 3125 3126 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 3127 free_irq(vdev->irq, adapter); 3128 tasklet_kill(&adapter->tasklet); 3129 do { 3130 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3131 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3132 3133 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 3134 DMA_BIDIRECTIONAL); 3135 free_page((unsigned long)crq->msgs); 3136 crq->msgs = NULL; 3137 } 3138 3139 static int init_crq_queue(struct ibmvnic_adapter *adapter) 3140 { 3141 struct ibmvnic_crq_queue *crq = &adapter->crq; 3142 struct device *dev = &adapter->vdev->dev; 3143 struct vio_dev *vdev = adapter->vdev; 3144 int rc, retrc = -ENOMEM; 3145 3146 if (crq->msgs) 3147 return 0; 3148 3149 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 3150 /* Should we allocate more than one page? */ 3151 3152 if (!crq->msgs) 3153 return -ENOMEM; 3154 3155 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3156 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 3157 DMA_BIDIRECTIONAL); 3158 if (dma_mapping_error(dev, crq->msg_token)) 3159 goto map_failed; 3160 3161 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3162 crq->msg_token, PAGE_SIZE); 3163 3164 if (rc == H_RESOURCE) 3165 /* maybe kexecing and resource is busy. try a reset */ 3166 rc = ibmvnic_reset_crq(adapter); 3167 retrc = rc; 3168 3169 if (rc == H_CLOSED) { 3170 dev_warn(dev, "Partner adapter not ready\n"); 3171 } else if (rc) { 3172 dev_warn(dev, "Error %d opening adapter\n", rc); 3173 goto reg_crq_failed; 3174 } 3175 3176 retrc = 0; 3177 3178 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 3179 (unsigned long)adapter); 3180 3181 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 3182 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 3183 adapter); 3184 if (rc) { 3185 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 3186 vdev->irq, rc); 3187 goto req_irq_failed; 3188 } 3189 3190 rc = vio_enable_interrupts(vdev); 3191 if (rc) { 3192 dev_err(dev, "Error %d enabling interrupts\n", rc); 3193 goto req_irq_failed; 3194 } 3195 3196 crq->cur = 0; 3197 spin_lock_init(&crq->lock); 3198 3199 return retrc; 3200 3201 req_irq_failed: 3202 tasklet_kill(&adapter->tasklet); 3203 do { 3204 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3205 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3206 reg_crq_failed: 3207 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3208 map_failed: 3209 free_page((unsigned long)crq->msgs); 3210 crq->msgs = NULL; 3211 return retrc; 3212 } 3213 3214 static void handle_crq_init_rsp(struct work_struct *work) 3215 { 3216 struct ibmvnic_adapter *adapter = container_of(work, 3217 struct ibmvnic_adapter, 3218 vnic_crq_init); 3219 struct device *dev = &adapter->vdev->dev; 3220 struct net_device *netdev = adapter->netdev; 3221 unsigned long timeout = msecs_to_jiffies(30000); 3222 bool restart = false; 3223 int rc; 3224 3225 if (adapter->failover) { 3226 release_sub_crqs(adapter); 3227 if (netif_running(netdev)) { 3228 netif_tx_disable(netdev); 3229 ibmvnic_close(netdev); 3230 restart = true; 3231 } 3232 } 3233 3234 reinit_completion(&adapter->init_done); 3235 send_version_xchg(adapter); 3236 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3237 dev_err(dev, "Passive init timeout\n"); 3238 goto task_failed; 3239 } 3240 3241 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3242 3243 if (adapter->failover) { 3244 adapter->failover = false; 3245 if (restart) { 3246 rc = ibmvnic_open(netdev); 3247 if (rc) 3248 goto restart_failed; 3249 } 3250 netif_carrier_on(netdev); 3251 return; 3252 } 3253 3254 rc = register_netdev(netdev); 3255 if (rc) { 3256 dev_err(dev, 3257 "failed to register netdev rc=%d\n", rc); 3258 goto register_failed; 3259 } 3260 dev_info(dev, "ibmvnic registered\n"); 3261 3262 return; 3263 3264 restart_failed: 3265 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc); 3266 register_failed: 3267 release_sub_crqs(adapter); 3268 task_failed: 3269 dev_err(dev, "Passive initialization was not successful\n"); 3270 } 3271 3272 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 3273 { 3274 struct device *dev = &adapter->vdev->dev; 3275 unsigned long timeout = msecs_to_jiffies(30000); 3276 int rc; 3277 3278 rc = init_crq_queue(adapter); 3279 if (rc) { 3280 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 3281 return rc; 3282 } 3283 3284 rc = init_stats_token(adapter); 3285 if (rc) { 3286 release_crq_queue(adapter); 3287 return rc; 3288 } 3289 3290 init_completion(&adapter->init_done); 3291 ibmvnic_send_crq_init(adapter); 3292 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3293 dev_err(dev, "Initialization sequence timed out\n"); 3294 release_crq_queue(adapter); 3295 return -1; 3296 } 3297 3298 return 0; 3299 } 3300 3301 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 3302 { 3303 struct ibmvnic_adapter *adapter; 3304 struct net_device *netdev; 3305 unsigned char *mac_addr_p; 3306 int rc; 3307 3308 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 3309 dev->unit_address); 3310 3311 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 3312 VETH_MAC_ADDR, NULL); 3313 if (!mac_addr_p) { 3314 dev_err(&dev->dev, 3315 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 3316 __FILE__, __LINE__); 3317 return 0; 3318 } 3319 3320 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 3321 IBMVNIC_MAX_TX_QUEUES); 3322 if (!netdev) 3323 return -ENOMEM; 3324 3325 adapter = netdev_priv(netdev); 3326 dev_set_drvdata(&dev->dev, netdev); 3327 adapter->vdev = dev; 3328 adapter->netdev = netdev; 3329 adapter->failover = false; 3330 3331 ether_addr_copy(adapter->mac_addr, mac_addr_p); 3332 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 3333 netdev->irq = dev->irq; 3334 netdev->netdev_ops = &ibmvnic_netdev_ops; 3335 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 3336 SET_NETDEV_DEV(netdev, &dev->dev); 3337 3338 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp); 3339 INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event); 3340 3341 spin_lock_init(&adapter->stats_lock); 3342 3343 INIT_LIST_HEAD(&adapter->errors); 3344 INIT_LIST_HEAD(&adapter->inflight); 3345 spin_lock_init(&adapter->error_list_lock); 3346 spin_lock_init(&adapter->inflight_lock); 3347 3348 rc = ibmvnic_init(adapter); 3349 if (rc) { 3350 free_netdev(netdev); 3351 return rc; 3352 } 3353 3354 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3355 adapter->is_closed = false; 3356 3357 rc = register_netdev(netdev); 3358 if (rc) { 3359 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 3360 free_netdev(netdev); 3361 return rc; 3362 } 3363 dev_info(&dev->dev, "ibmvnic registered\n"); 3364 3365 return 0; 3366 } 3367 3368 static int ibmvnic_remove(struct vio_dev *dev) 3369 { 3370 struct net_device *netdev = dev_get_drvdata(&dev->dev); 3371 3372 unregister_netdev(netdev); 3373 free_netdev(netdev); 3374 dev_set_drvdata(&dev->dev, NULL); 3375 3376 return 0; 3377 } 3378 3379 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 3380 { 3381 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 3382 struct ibmvnic_adapter *adapter; 3383 struct iommu_table *tbl; 3384 unsigned long ret = 0; 3385 int i; 3386 3387 tbl = get_iommu_table_base(&vdev->dev); 3388 3389 /* netdev inits at probe time along with the structures we need below*/ 3390 if (!netdev) 3391 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 3392 3393 adapter = netdev_priv(netdev); 3394 3395 ret += PAGE_SIZE; /* the crq message queue */ 3396 ret += adapter->bounce_buffer_size; 3397 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 3398 3399 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 3400 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 3401 3402 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 3403 i++) 3404 ret += adapter->rx_pool[i].size * 3405 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 3406 3407 return ret; 3408 } 3409 3410 static int ibmvnic_resume(struct device *dev) 3411 { 3412 struct net_device *netdev = dev_get_drvdata(dev); 3413 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3414 int i; 3415 3416 /* kick the interrupt handlers just in case we lost an interrupt */ 3417 for (i = 0; i < adapter->req_rx_queues; i++) 3418 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 3419 adapter->rx_scrq[i]); 3420 3421 return 0; 3422 } 3423 3424 static struct vio_device_id ibmvnic_device_table[] = { 3425 {"network", "IBM,vnic"}, 3426 {"", "" } 3427 }; 3428 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 3429 3430 static const struct dev_pm_ops ibmvnic_pm_ops = { 3431 .resume = ibmvnic_resume 3432 }; 3433 3434 static struct vio_driver ibmvnic_driver = { 3435 .id_table = ibmvnic_device_table, 3436 .probe = ibmvnic_probe, 3437 .remove = ibmvnic_remove, 3438 .get_desired_dma = ibmvnic_get_desired_dma, 3439 .name = ibmvnic_driver_name, 3440 .pm = &ibmvnic_pm_ops, 3441 }; 3442 3443 /* module functions */ 3444 static int __init ibmvnic_module_init(void) 3445 { 3446 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 3447 IBMVNIC_DRIVER_VERSION); 3448 3449 return vio_register_driver(&ibmvnic_driver); 3450 } 3451 3452 static void __exit ibmvnic_module_exit(void) 3453 { 3454 vio_unregister_driver(&ibmvnic_driver); 3455 } 3456 3457 module_init(ibmvnic_module_init); 3458 module_exit(ibmvnic_module_exit); 3459