1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/kthread.h> 57 #include <linux/seq_file.h> 58 #include <linux/interrupt.h> 59 #include <net/net_namespace.h> 60 #include <asm/hvcall.h> 61 #include <linux/atomic.h> 62 #include <asm/vio.h> 63 #include <asm/iommu.h> 64 #include <linux/uaccess.h> 65 #include <asm/firmware.h> 66 #include <linux/workqueue.h> 67 #include <linux/if_vlan.h> 68 #include <linux/utsname.h> 69 70 #include "ibmvnic.h" 71 72 static const char ibmvnic_driver_name[] = "ibmvnic"; 73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 74 75 MODULE_AUTHOR("Santiago Leon"); 76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 77 MODULE_LICENSE("GPL"); 78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 79 80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 81 static int ibmvnic_remove(struct vio_dev *); 82 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 87 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 88 union sub_crq *sub_crq); 89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 91 static int enable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int disable_scrq_irq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static int pending_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 98 struct ibmvnic_sub_crq_queue *); 99 static int ibmvnic_poll(struct napi_struct *napi, int data); 100 static void send_query_map(struct ibmvnic_adapter *adapter); 101 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 102 static int send_request_unmap(struct ibmvnic_adapter *, u8); 103 static int send_login(struct ibmvnic_adapter *adapter); 104 static void send_query_cap(struct ibmvnic_adapter *adapter); 105 static int init_sub_crqs(struct ibmvnic_adapter *); 106 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 107 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 108 static void release_crq_queue(struct ibmvnic_adapter *); 109 static int __ibmvnic_set_mac(struct net_device *, u8 *); 110 static int init_crq_queue(struct ibmvnic_adapter *adapter); 111 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 112 113 struct ibmvnic_stat { 114 char name[ETH_GSTRING_LEN]; 115 int offset; 116 }; 117 118 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 119 offsetof(struct ibmvnic_statistics, stat)) 120 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 121 122 static const struct ibmvnic_stat ibmvnic_stats[] = { 123 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 124 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 125 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 126 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 127 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 128 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 129 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 130 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 131 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 132 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 133 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 134 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 135 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 136 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 137 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 138 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 139 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 140 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 141 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 142 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 143 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 144 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 145 }; 146 147 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 148 unsigned long length, unsigned long *number, 149 unsigned long *irq) 150 { 151 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 152 long rc; 153 154 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 155 *number = retbuf[0]; 156 *irq = retbuf[1]; 157 158 return rc; 159 } 160 161 /** 162 * ibmvnic_wait_for_completion - Check device state and wait for completion 163 * @adapter: private device data 164 * @comp_done: completion structure to wait for 165 * @timeout: time to wait in milliseconds 166 * 167 * Wait for a completion signal or until the timeout limit is reached 168 * while checking that the device is still active. 169 */ 170 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 171 struct completion *comp_done, 172 unsigned long timeout) 173 { 174 struct net_device *netdev; 175 unsigned long div_timeout; 176 u8 retry; 177 178 netdev = adapter->netdev; 179 retry = 5; 180 div_timeout = msecs_to_jiffies(timeout / retry); 181 while (true) { 182 if (!adapter->crq.active) { 183 netdev_err(netdev, "Device down!\n"); 184 return -ENODEV; 185 } 186 if (!retry--) 187 break; 188 if (wait_for_completion_timeout(comp_done, div_timeout)) 189 return 0; 190 } 191 netdev_err(netdev, "Operation timed out.\n"); 192 return -ETIMEDOUT; 193 } 194 195 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 196 struct ibmvnic_long_term_buff *ltb, int size) 197 { 198 struct device *dev = &adapter->vdev->dev; 199 int rc; 200 201 ltb->size = size; 202 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 203 GFP_KERNEL); 204 205 if (!ltb->buff) { 206 dev_err(dev, "Couldn't alloc long term buffer\n"); 207 return -ENOMEM; 208 } 209 ltb->map_id = adapter->map_id; 210 adapter->map_id++; 211 212 mutex_lock(&adapter->fw_lock); 213 adapter->fw_done_rc = 0; 214 reinit_completion(&adapter->fw_done); 215 rc = send_request_map(adapter, ltb->addr, 216 ltb->size, ltb->map_id); 217 if (rc) { 218 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 219 mutex_unlock(&adapter->fw_lock); 220 return rc; 221 } 222 223 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 224 if (rc) { 225 dev_err(dev, 226 "Long term map request aborted or timed out,rc = %d\n", 227 rc); 228 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 229 mutex_unlock(&adapter->fw_lock); 230 return rc; 231 } 232 233 if (adapter->fw_done_rc) { 234 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 235 adapter->fw_done_rc); 236 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 237 mutex_unlock(&adapter->fw_lock); 238 return -1; 239 } 240 mutex_unlock(&adapter->fw_lock); 241 return 0; 242 } 243 244 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 245 struct ibmvnic_long_term_buff *ltb) 246 { 247 struct device *dev = &adapter->vdev->dev; 248 249 if (!ltb->buff) 250 return; 251 252 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 253 adapter->reset_reason != VNIC_RESET_MOBILITY) 254 send_request_unmap(adapter, ltb->map_id); 255 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 256 } 257 258 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 259 struct ibmvnic_long_term_buff *ltb) 260 { 261 struct device *dev = &adapter->vdev->dev; 262 int rc; 263 264 memset(ltb->buff, 0, ltb->size); 265 266 mutex_lock(&adapter->fw_lock); 267 adapter->fw_done_rc = 0; 268 269 reinit_completion(&adapter->fw_done); 270 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 271 if (rc) { 272 mutex_unlock(&adapter->fw_lock); 273 return rc; 274 } 275 276 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 277 if (rc) { 278 dev_info(dev, 279 "Reset failed, long term map request timed out or aborted\n"); 280 mutex_unlock(&adapter->fw_lock); 281 return rc; 282 } 283 284 if (adapter->fw_done_rc) { 285 dev_info(dev, 286 "Reset failed, attempting to free and reallocate buffer\n"); 287 free_long_term_buff(adapter, ltb); 288 mutex_unlock(&adapter->fw_lock); 289 return alloc_long_term_buff(adapter, ltb, ltb->size); 290 } 291 mutex_unlock(&adapter->fw_lock); 292 return 0; 293 } 294 295 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 296 { 297 int i; 298 299 for (i = 0; i < adapter->num_active_rx_pools; i++) 300 adapter->rx_pool[i].active = 0; 301 } 302 303 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 304 struct ibmvnic_rx_pool *pool) 305 { 306 int count = pool->size - atomic_read(&pool->available); 307 u64 handle = adapter->rx_scrq[pool->index]->handle; 308 struct device *dev = &adapter->vdev->dev; 309 int buffers_added = 0; 310 unsigned long lpar_rc; 311 union sub_crq sub_crq; 312 struct sk_buff *skb; 313 unsigned int offset; 314 dma_addr_t dma_addr; 315 unsigned char *dst; 316 int shift = 0; 317 int index; 318 int i; 319 320 if (!pool->active) 321 return; 322 323 for (i = 0; i < count; ++i) { 324 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 325 if (!skb) { 326 dev_err(dev, "Couldn't replenish rx buff\n"); 327 adapter->replenish_no_mem++; 328 break; 329 } 330 331 index = pool->free_map[pool->next_free]; 332 333 if (pool->rx_buff[index].skb) 334 dev_err(dev, "Inconsistent free_map!\n"); 335 336 /* Copy the skb to the long term mapped DMA buffer */ 337 offset = index * pool->buff_size; 338 dst = pool->long_term_buff.buff + offset; 339 memset(dst, 0, pool->buff_size); 340 dma_addr = pool->long_term_buff.addr + offset; 341 pool->rx_buff[index].data = dst; 342 343 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 344 pool->rx_buff[index].dma = dma_addr; 345 pool->rx_buff[index].skb = skb; 346 pool->rx_buff[index].pool_index = pool->index; 347 pool->rx_buff[index].size = pool->buff_size; 348 349 memset(&sub_crq, 0, sizeof(sub_crq)); 350 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 351 sub_crq.rx_add.correlator = 352 cpu_to_be64((u64)&pool->rx_buff[index]); 353 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 354 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 355 356 /* The length field of the sCRQ is defined to be 24 bits so the 357 * buffer size needs to be left shifted by a byte before it is 358 * converted to big endian to prevent the last byte from being 359 * truncated. 360 */ 361 #ifdef __LITTLE_ENDIAN__ 362 shift = 8; 363 #endif 364 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 365 366 lpar_rc = send_subcrq(adapter, handle, &sub_crq); 367 if (lpar_rc != H_SUCCESS) 368 goto failure; 369 370 buffers_added++; 371 adapter->replenish_add_buff_success++; 372 pool->next_free = (pool->next_free + 1) % pool->size; 373 } 374 atomic_add(buffers_added, &pool->available); 375 return; 376 377 failure: 378 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 379 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 380 pool->free_map[pool->next_free] = index; 381 pool->rx_buff[index].skb = NULL; 382 383 dev_kfree_skb_any(skb); 384 adapter->replenish_add_buff_failure++; 385 atomic_add(buffers_added, &pool->available); 386 387 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 388 /* Disable buffer pool replenishment and report carrier off if 389 * queue is closed or pending failover. 390 * Firmware guarantees that a signal will be sent to the 391 * driver, triggering a reset. 392 */ 393 deactivate_rx_pools(adapter); 394 netif_carrier_off(adapter->netdev); 395 } 396 } 397 398 static void replenish_pools(struct ibmvnic_adapter *adapter) 399 { 400 int i; 401 402 adapter->replenish_task_cycles++; 403 for (i = 0; i < adapter->num_active_rx_pools; i++) { 404 if (adapter->rx_pool[i].active) 405 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 406 } 407 } 408 409 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 410 { 411 kfree(adapter->tx_stats_buffers); 412 kfree(adapter->rx_stats_buffers); 413 adapter->tx_stats_buffers = NULL; 414 adapter->rx_stats_buffers = NULL; 415 } 416 417 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 418 { 419 adapter->tx_stats_buffers = 420 kcalloc(IBMVNIC_MAX_QUEUES, 421 sizeof(struct ibmvnic_tx_queue_stats), 422 GFP_KERNEL); 423 if (!adapter->tx_stats_buffers) 424 return -ENOMEM; 425 426 adapter->rx_stats_buffers = 427 kcalloc(IBMVNIC_MAX_QUEUES, 428 sizeof(struct ibmvnic_rx_queue_stats), 429 GFP_KERNEL); 430 if (!adapter->rx_stats_buffers) 431 return -ENOMEM; 432 433 return 0; 434 } 435 436 static void release_stats_token(struct ibmvnic_adapter *adapter) 437 { 438 struct device *dev = &adapter->vdev->dev; 439 440 if (!adapter->stats_token) 441 return; 442 443 dma_unmap_single(dev, adapter->stats_token, 444 sizeof(struct ibmvnic_statistics), 445 DMA_FROM_DEVICE); 446 adapter->stats_token = 0; 447 } 448 449 static int init_stats_token(struct ibmvnic_adapter *adapter) 450 { 451 struct device *dev = &adapter->vdev->dev; 452 dma_addr_t stok; 453 454 stok = dma_map_single(dev, &adapter->stats, 455 sizeof(struct ibmvnic_statistics), 456 DMA_FROM_DEVICE); 457 if (dma_mapping_error(dev, stok)) { 458 dev_err(dev, "Couldn't map stats buffer\n"); 459 return -1; 460 } 461 462 adapter->stats_token = stok; 463 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 464 return 0; 465 } 466 467 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 468 { 469 struct ibmvnic_rx_pool *rx_pool; 470 u64 buff_size; 471 int rx_scrqs; 472 int i, j, rc; 473 474 if (!adapter->rx_pool) 475 return -1; 476 477 buff_size = adapter->cur_rx_buf_sz; 478 rx_scrqs = adapter->num_active_rx_pools; 479 for (i = 0; i < rx_scrqs; i++) { 480 rx_pool = &adapter->rx_pool[i]; 481 482 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 483 484 if (rx_pool->buff_size != buff_size) { 485 free_long_term_buff(adapter, &rx_pool->long_term_buff); 486 rx_pool->buff_size = buff_size; 487 rc = alloc_long_term_buff(adapter, 488 &rx_pool->long_term_buff, 489 rx_pool->size * 490 rx_pool->buff_size); 491 } else { 492 rc = reset_long_term_buff(adapter, 493 &rx_pool->long_term_buff); 494 } 495 496 if (rc) 497 return rc; 498 499 for (j = 0; j < rx_pool->size; j++) 500 rx_pool->free_map[j] = j; 501 502 memset(rx_pool->rx_buff, 0, 503 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 504 505 atomic_set(&rx_pool->available, 0); 506 rx_pool->next_alloc = 0; 507 rx_pool->next_free = 0; 508 rx_pool->active = 1; 509 } 510 511 return 0; 512 } 513 514 static void release_rx_pools(struct ibmvnic_adapter *adapter) 515 { 516 struct ibmvnic_rx_pool *rx_pool; 517 int i, j; 518 519 if (!adapter->rx_pool) 520 return; 521 522 for (i = 0; i < adapter->num_active_rx_pools; i++) { 523 rx_pool = &adapter->rx_pool[i]; 524 525 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 526 527 kfree(rx_pool->free_map); 528 free_long_term_buff(adapter, &rx_pool->long_term_buff); 529 530 if (!rx_pool->rx_buff) 531 continue; 532 533 for (j = 0; j < rx_pool->size; j++) { 534 if (rx_pool->rx_buff[j].skb) { 535 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 536 rx_pool->rx_buff[j].skb = NULL; 537 } 538 } 539 540 kfree(rx_pool->rx_buff); 541 } 542 543 kfree(adapter->rx_pool); 544 adapter->rx_pool = NULL; 545 adapter->num_active_rx_pools = 0; 546 } 547 548 static int init_rx_pools(struct net_device *netdev) 549 { 550 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 551 struct device *dev = &adapter->vdev->dev; 552 struct ibmvnic_rx_pool *rx_pool; 553 int rxadd_subcrqs; 554 u64 buff_size; 555 int i, j; 556 557 rxadd_subcrqs = adapter->num_active_rx_scrqs; 558 buff_size = adapter->cur_rx_buf_sz; 559 560 adapter->rx_pool = kcalloc(rxadd_subcrqs, 561 sizeof(struct ibmvnic_rx_pool), 562 GFP_KERNEL); 563 if (!adapter->rx_pool) { 564 dev_err(dev, "Failed to allocate rx pools\n"); 565 return -1; 566 } 567 568 adapter->num_active_rx_pools = rxadd_subcrqs; 569 570 for (i = 0; i < rxadd_subcrqs; i++) { 571 rx_pool = &adapter->rx_pool[i]; 572 573 netdev_dbg(adapter->netdev, 574 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 575 i, adapter->req_rx_add_entries_per_subcrq, 576 buff_size); 577 578 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 579 rx_pool->index = i; 580 rx_pool->buff_size = buff_size; 581 rx_pool->active = 1; 582 583 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 584 GFP_KERNEL); 585 if (!rx_pool->free_map) { 586 release_rx_pools(adapter); 587 return -1; 588 } 589 590 rx_pool->rx_buff = kcalloc(rx_pool->size, 591 sizeof(struct ibmvnic_rx_buff), 592 GFP_KERNEL); 593 if (!rx_pool->rx_buff) { 594 dev_err(dev, "Couldn't alloc rx buffers\n"); 595 release_rx_pools(adapter); 596 return -1; 597 } 598 599 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 600 rx_pool->size * rx_pool->buff_size)) { 601 release_rx_pools(adapter); 602 return -1; 603 } 604 605 for (j = 0; j < rx_pool->size; ++j) 606 rx_pool->free_map[j] = j; 607 608 atomic_set(&rx_pool->available, 0); 609 rx_pool->next_alloc = 0; 610 rx_pool->next_free = 0; 611 } 612 613 return 0; 614 } 615 616 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 617 struct ibmvnic_tx_pool *tx_pool) 618 { 619 int rc, i; 620 621 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 622 if (rc) 623 return rc; 624 625 memset(tx_pool->tx_buff, 0, 626 tx_pool->num_buffers * 627 sizeof(struct ibmvnic_tx_buff)); 628 629 for (i = 0; i < tx_pool->num_buffers; i++) 630 tx_pool->free_map[i] = i; 631 632 tx_pool->consumer_index = 0; 633 tx_pool->producer_index = 0; 634 635 return 0; 636 } 637 638 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 639 { 640 int tx_scrqs; 641 int i, rc; 642 643 if (!adapter->tx_pool) 644 return -1; 645 646 tx_scrqs = adapter->num_active_tx_pools; 647 for (i = 0; i < tx_scrqs; i++) { 648 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 649 if (rc) 650 return rc; 651 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 652 if (rc) 653 return rc; 654 } 655 656 return 0; 657 } 658 659 static void release_vpd_data(struct ibmvnic_adapter *adapter) 660 { 661 if (!adapter->vpd) 662 return; 663 664 kfree(adapter->vpd->buff); 665 kfree(adapter->vpd); 666 667 adapter->vpd = NULL; 668 } 669 670 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 671 struct ibmvnic_tx_pool *tx_pool) 672 { 673 kfree(tx_pool->tx_buff); 674 kfree(tx_pool->free_map); 675 free_long_term_buff(adapter, &tx_pool->long_term_buff); 676 } 677 678 static void release_tx_pools(struct ibmvnic_adapter *adapter) 679 { 680 int i; 681 682 if (!adapter->tx_pool) 683 return; 684 685 for (i = 0; i < adapter->num_active_tx_pools; i++) { 686 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 687 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 688 } 689 690 kfree(adapter->tx_pool); 691 adapter->tx_pool = NULL; 692 kfree(adapter->tso_pool); 693 adapter->tso_pool = NULL; 694 adapter->num_active_tx_pools = 0; 695 } 696 697 static int init_one_tx_pool(struct net_device *netdev, 698 struct ibmvnic_tx_pool *tx_pool, 699 int num_entries, int buf_size) 700 { 701 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 702 int i; 703 704 tx_pool->tx_buff = kcalloc(num_entries, 705 sizeof(struct ibmvnic_tx_buff), 706 GFP_KERNEL); 707 if (!tx_pool->tx_buff) 708 return -1; 709 710 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 711 num_entries * buf_size)) 712 return -1; 713 714 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 715 if (!tx_pool->free_map) 716 return -1; 717 718 for (i = 0; i < num_entries; i++) 719 tx_pool->free_map[i] = i; 720 721 tx_pool->consumer_index = 0; 722 tx_pool->producer_index = 0; 723 tx_pool->num_buffers = num_entries; 724 tx_pool->buf_size = buf_size; 725 726 return 0; 727 } 728 729 static int init_tx_pools(struct net_device *netdev) 730 { 731 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 732 int tx_subcrqs; 733 int i, rc; 734 735 tx_subcrqs = adapter->num_active_tx_scrqs; 736 adapter->tx_pool = kcalloc(tx_subcrqs, 737 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 738 if (!adapter->tx_pool) 739 return -1; 740 741 adapter->tso_pool = kcalloc(tx_subcrqs, 742 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 743 if (!adapter->tso_pool) 744 return -1; 745 746 adapter->num_active_tx_pools = tx_subcrqs; 747 748 for (i = 0; i < tx_subcrqs; i++) { 749 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 750 adapter->req_tx_entries_per_subcrq, 751 adapter->req_mtu + VLAN_HLEN); 752 if (rc) { 753 release_tx_pools(adapter); 754 return rc; 755 } 756 757 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 758 IBMVNIC_TSO_BUFS, 759 IBMVNIC_TSO_BUF_SZ); 760 if (rc) { 761 release_tx_pools(adapter); 762 return rc; 763 } 764 } 765 766 return 0; 767 } 768 769 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 770 { 771 int i; 772 773 if (adapter->napi_enabled) 774 return; 775 776 for (i = 0; i < adapter->req_rx_queues; i++) 777 napi_enable(&adapter->napi[i]); 778 779 adapter->napi_enabled = true; 780 } 781 782 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 783 { 784 int i; 785 786 if (!adapter->napi_enabled) 787 return; 788 789 for (i = 0; i < adapter->req_rx_queues; i++) { 790 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 791 napi_disable(&adapter->napi[i]); 792 } 793 794 adapter->napi_enabled = false; 795 } 796 797 static int init_napi(struct ibmvnic_adapter *adapter) 798 { 799 int i; 800 801 adapter->napi = kcalloc(adapter->req_rx_queues, 802 sizeof(struct napi_struct), GFP_KERNEL); 803 if (!adapter->napi) 804 return -ENOMEM; 805 806 for (i = 0; i < adapter->req_rx_queues; i++) { 807 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 808 netif_napi_add(adapter->netdev, &adapter->napi[i], 809 ibmvnic_poll, NAPI_POLL_WEIGHT); 810 } 811 812 adapter->num_active_rx_napi = adapter->req_rx_queues; 813 return 0; 814 } 815 816 static void release_napi(struct ibmvnic_adapter *adapter) 817 { 818 int i; 819 820 if (!adapter->napi) 821 return; 822 823 for (i = 0; i < adapter->num_active_rx_napi; i++) { 824 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 825 netif_napi_del(&adapter->napi[i]); 826 } 827 828 kfree(adapter->napi); 829 adapter->napi = NULL; 830 adapter->num_active_rx_napi = 0; 831 adapter->napi_enabled = false; 832 } 833 834 static int ibmvnic_login(struct net_device *netdev) 835 { 836 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 837 unsigned long timeout = msecs_to_jiffies(20000); 838 int retry_count = 0; 839 int retries = 10; 840 bool retry; 841 int rc; 842 843 do { 844 retry = false; 845 if (retry_count > retries) { 846 netdev_warn(netdev, "Login attempts exceeded\n"); 847 return -1; 848 } 849 850 adapter->init_done_rc = 0; 851 reinit_completion(&adapter->init_done); 852 rc = send_login(adapter); 853 if (rc) 854 return rc; 855 856 if (!wait_for_completion_timeout(&adapter->init_done, 857 timeout)) { 858 netdev_warn(netdev, "Login timed out, retrying...\n"); 859 retry = true; 860 adapter->init_done_rc = 0; 861 retry_count++; 862 continue; 863 } 864 865 if (adapter->init_done_rc == ABORTED) { 866 netdev_warn(netdev, "Login aborted, retrying...\n"); 867 retry = true; 868 adapter->init_done_rc = 0; 869 retry_count++; 870 /* FW or device may be busy, so 871 * wait a bit before retrying login 872 */ 873 msleep(500); 874 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 875 retry_count++; 876 release_sub_crqs(adapter, 1); 877 878 retry = true; 879 netdev_dbg(netdev, 880 "Received partial success, retrying...\n"); 881 adapter->init_done_rc = 0; 882 reinit_completion(&adapter->init_done); 883 send_query_cap(adapter); 884 if (!wait_for_completion_timeout(&adapter->init_done, 885 timeout)) { 886 netdev_warn(netdev, 887 "Capabilities query timed out\n"); 888 return -1; 889 } 890 891 rc = init_sub_crqs(adapter); 892 if (rc) { 893 netdev_warn(netdev, 894 "SCRQ initialization failed\n"); 895 return -1; 896 } 897 898 rc = init_sub_crq_irqs(adapter); 899 if (rc) { 900 netdev_warn(netdev, 901 "SCRQ irq initialization failed\n"); 902 return -1; 903 } 904 } else if (adapter->init_done_rc) { 905 netdev_warn(netdev, "Adapter login failed\n"); 906 return -1; 907 } 908 } while (retry); 909 910 __ibmvnic_set_mac(netdev, adapter->mac_addr); 911 912 return 0; 913 } 914 915 static void release_login_buffer(struct ibmvnic_adapter *adapter) 916 { 917 kfree(adapter->login_buf); 918 adapter->login_buf = NULL; 919 } 920 921 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 922 { 923 kfree(adapter->login_rsp_buf); 924 adapter->login_rsp_buf = NULL; 925 } 926 927 static void release_resources(struct ibmvnic_adapter *adapter) 928 { 929 release_vpd_data(adapter); 930 931 release_tx_pools(adapter); 932 release_rx_pools(adapter); 933 934 release_napi(adapter); 935 release_login_rsp_buffer(adapter); 936 } 937 938 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 939 { 940 struct net_device *netdev = adapter->netdev; 941 unsigned long timeout = msecs_to_jiffies(20000); 942 union ibmvnic_crq crq; 943 bool resend; 944 int rc; 945 946 netdev_dbg(netdev, "setting link state %d\n", link_state); 947 948 memset(&crq, 0, sizeof(crq)); 949 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 950 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 951 crq.logical_link_state.link_state = link_state; 952 953 do { 954 resend = false; 955 956 reinit_completion(&adapter->init_done); 957 rc = ibmvnic_send_crq(adapter, &crq); 958 if (rc) { 959 netdev_err(netdev, "Failed to set link state\n"); 960 return rc; 961 } 962 963 if (!wait_for_completion_timeout(&adapter->init_done, 964 timeout)) { 965 netdev_err(netdev, "timeout setting link state\n"); 966 return -1; 967 } 968 969 if (adapter->init_done_rc == PARTIALSUCCESS) { 970 /* Partuial success, delay and re-send */ 971 mdelay(1000); 972 resend = true; 973 } else if (adapter->init_done_rc) { 974 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 975 adapter->init_done_rc); 976 return adapter->init_done_rc; 977 } 978 } while (resend); 979 980 return 0; 981 } 982 983 static int set_real_num_queues(struct net_device *netdev) 984 { 985 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 986 int rc; 987 988 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 989 adapter->req_tx_queues, adapter->req_rx_queues); 990 991 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 992 if (rc) { 993 netdev_err(netdev, "failed to set the number of tx queues\n"); 994 return rc; 995 } 996 997 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 998 if (rc) 999 netdev_err(netdev, "failed to set the number of rx queues\n"); 1000 1001 return rc; 1002 } 1003 1004 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1005 { 1006 struct device *dev = &adapter->vdev->dev; 1007 union ibmvnic_crq crq; 1008 int len = 0; 1009 int rc; 1010 1011 if (adapter->vpd->buff) 1012 len = adapter->vpd->len; 1013 1014 mutex_lock(&adapter->fw_lock); 1015 adapter->fw_done_rc = 0; 1016 reinit_completion(&adapter->fw_done); 1017 1018 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1019 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1020 rc = ibmvnic_send_crq(adapter, &crq); 1021 if (rc) { 1022 mutex_unlock(&adapter->fw_lock); 1023 return rc; 1024 } 1025 1026 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1027 if (rc) { 1028 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1029 mutex_unlock(&adapter->fw_lock); 1030 return rc; 1031 } 1032 mutex_unlock(&adapter->fw_lock); 1033 1034 if (!adapter->vpd->len) 1035 return -ENODATA; 1036 1037 if (!adapter->vpd->buff) 1038 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1039 else if (adapter->vpd->len != len) 1040 adapter->vpd->buff = 1041 krealloc(adapter->vpd->buff, 1042 adapter->vpd->len, GFP_KERNEL); 1043 1044 if (!adapter->vpd->buff) { 1045 dev_err(dev, "Could allocate VPD buffer\n"); 1046 return -ENOMEM; 1047 } 1048 1049 adapter->vpd->dma_addr = 1050 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1051 DMA_FROM_DEVICE); 1052 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1053 dev_err(dev, "Could not map VPD buffer\n"); 1054 kfree(adapter->vpd->buff); 1055 adapter->vpd->buff = NULL; 1056 return -ENOMEM; 1057 } 1058 1059 mutex_lock(&adapter->fw_lock); 1060 adapter->fw_done_rc = 0; 1061 reinit_completion(&adapter->fw_done); 1062 1063 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1064 crq.get_vpd.cmd = GET_VPD; 1065 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1066 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1067 rc = ibmvnic_send_crq(adapter, &crq); 1068 if (rc) { 1069 kfree(adapter->vpd->buff); 1070 adapter->vpd->buff = NULL; 1071 mutex_unlock(&adapter->fw_lock); 1072 return rc; 1073 } 1074 1075 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1076 if (rc) { 1077 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1078 kfree(adapter->vpd->buff); 1079 adapter->vpd->buff = NULL; 1080 mutex_unlock(&adapter->fw_lock); 1081 return rc; 1082 } 1083 1084 mutex_unlock(&adapter->fw_lock); 1085 return 0; 1086 } 1087 1088 static int init_resources(struct ibmvnic_adapter *adapter) 1089 { 1090 struct net_device *netdev = adapter->netdev; 1091 int rc; 1092 1093 rc = set_real_num_queues(netdev); 1094 if (rc) 1095 return rc; 1096 1097 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1098 if (!adapter->vpd) 1099 return -ENOMEM; 1100 1101 /* Vital Product Data (VPD) */ 1102 rc = ibmvnic_get_vpd(adapter); 1103 if (rc) { 1104 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1105 return rc; 1106 } 1107 1108 adapter->map_id = 1; 1109 1110 rc = init_napi(adapter); 1111 if (rc) 1112 return rc; 1113 1114 send_query_map(adapter); 1115 1116 rc = init_rx_pools(netdev); 1117 if (rc) 1118 return rc; 1119 1120 rc = init_tx_pools(netdev); 1121 return rc; 1122 } 1123 1124 static int __ibmvnic_open(struct net_device *netdev) 1125 { 1126 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1127 enum vnic_state prev_state = adapter->state; 1128 int i, rc; 1129 1130 adapter->state = VNIC_OPENING; 1131 replenish_pools(adapter); 1132 ibmvnic_napi_enable(adapter); 1133 1134 /* We're ready to receive frames, enable the sub-crq interrupts and 1135 * set the logical link state to up 1136 */ 1137 for (i = 0; i < adapter->req_rx_queues; i++) { 1138 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1139 if (prev_state == VNIC_CLOSED) 1140 enable_irq(adapter->rx_scrq[i]->irq); 1141 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1142 } 1143 1144 for (i = 0; i < adapter->req_tx_queues; i++) { 1145 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1146 if (prev_state == VNIC_CLOSED) 1147 enable_irq(adapter->tx_scrq[i]->irq); 1148 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1149 } 1150 1151 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1152 if (rc) { 1153 for (i = 0; i < adapter->req_rx_queues; i++) 1154 napi_disable(&adapter->napi[i]); 1155 release_resources(adapter); 1156 return rc; 1157 } 1158 1159 netif_tx_start_all_queues(netdev); 1160 1161 if (prev_state == VNIC_CLOSED) { 1162 for (i = 0; i < adapter->req_rx_queues; i++) 1163 napi_schedule(&adapter->napi[i]); 1164 } 1165 1166 adapter->state = VNIC_OPEN; 1167 return rc; 1168 } 1169 1170 static int ibmvnic_open(struct net_device *netdev) 1171 { 1172 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1173 int rc; 1174 1175 /* If device failover is pending, just set device state and return. 1176 * Device operation will be handled by reset routine. 1177 */ 1178 if (adapter->failover_pending) { 1179 adapter->state = VNIC_OPEN; 1180 return 0; 1181 } 1182 1183 if (adapter->state != VNIC_CLOSED) { 1184 rc = ibmvnic_login(netdev); 1185 if (rc) 1186 goto out; 1187 1188 rc = init_resources(adapter); 1189 if (rc) { 1190 netdev_err(netdev, "failed to initialize resources\n"); 1191 release_resources(adapter); 1192 goto out; 1193 } 1194 } 1195 1196 rc = __ibmvnic_open(netdev); 1197 1198 out: 1199 /* 1200 * If open fails due to a pending failover, set device state and 1201 * return. Device operation will be handled by reset routine. 1202 */ 1203 if (rc && adapter->failover_pending) { 1204 adapter->state = VNIC_OPEN; 1205 rc = 0; 1206 } 1207 return rc; 1208 } 1209 1210 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1211 { 1212 struct ibmvnic_rx_pool *rx_pool; 1213 struct ibmvnic_rx_buff *rx_buff; 1214 u64 rx_entries; 1215 int rx_scrqs; 1216 int i, j; 1217 1218 if (!adapter->rx_pool) 1219 return; 1220 1221 rx_scrqs = adapter->num_active_rx_pools; 1222 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1223 1224 /* Free any remaining skbs in the rx buffer pools */ 1225 for (i = 0; i < rx_scrqs; i++) { 1226 rx_pool = &adapter->rx_pool[i]; 1227 if (!rx_pool || !rx_pool->rx_buff) 1228 continue; 1229 1230 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1231 for (j = 0; j < rx_entries; j++) { 1232 rx_buff = &rx_pool->rx_buff[j]; 1233 if (rx_buff && rx_buff->skb) { 1234 dev_kfree_skb_any(rx_buff->skb); 1235 rx_buff->skb = NULL; 1236 } 1237 } 1238 } 1239 } 1240 1241 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1242 struct ibmvnic_tx_pool *tx_pool) 1243 { 1244 struct ibmvnic_tx_buff *tx_buff; 1245 u64 tx_entries; 1246 int i; 1247 1248 if (!tx_pool || !tx_pool->tx_buff) 1249 return; 1250 1251 tx_entries = tx_pool->num_buffers; 1252 1253 for (i = 0; i < tx_entries; i++) { 1254 tx_buff = &tx_pool->tx_buff[i]; 1255 if (tx_buff && tx_buff->skb) { 1256 dev_kfree_skb_any(tx_buff->skb); 1257 tx_buff->skb = NULL; 1258 } 1259 } 1260 } 1261 1262 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1263 { 1264 int tx_scrqs; 1265 int i; 1266 1267 if (!adapter->tx_pool || !adapter->tso_pool) 1268 return; 1269 1270 tx_scrqs = adapter->num_active_tx_pools; 1271 1272 /* Free any remaining skbs in the tx buffer pools */ 1273 for (i = 0; i < tx_scrqs; i++) { 1274 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1275 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1276 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1277 } 1278 } 1279 1280 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1281 { 1282 struct net_device *netdev = adapter->netdev; 1283 int i; 1284 1285 if (adapter->tx_scrq) { 1286 for (i = 0; i < adapter->req_tx_queues; i++) 1287 if (adapter->tx_scrq[i]->irq) { 1288 netdev_dbg(netdev, 1289 "Disabling tx_scrq[%d] irq\n", i); 1290 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1291 disable_irq(adapter->tx_scrq[i]->irq); 1292 } 1293 } 1294 1295 if (adapter->rx_scrq) { 1296 for (i = 0; i < adapter->req_rx_queues; i++) { 1297 if (adapter->rx_scrq[i]->irq) { 1298 netdev_dbg(netdev, 1299 "Disabling rx_scrq[%d] irq\n", i); 1300 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1301 disable_irq(adapter->rx_scrq[i]->irq); 1302 } 1303 } 1304 } 1305 } 1306 1307 static void ibmvnic_cleanup(struct net_device *netdev) 1308 { 1309 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1310 1311 /* ensure that transmissions are stopped if called by do_reset */ 1312 if (test_bit(0, &adapter->resetting)) 1313 netif_tx_disable(netdev); 1314 else 1315 netif_tx_stop_all_queues(netdev); 1316 1317 ibmvnic_napi_disable(adapter); 1318 ibmvnic_disable_irqs(adapter); 1319 1320 clean_rx_pools(adapter); 1321 clean_tx_pools(adapter); 1322 } 1323 1324 static int __ibmvnic_close(struct net_device *netdev) 1325 { 1326 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1327 int rc = 0; 1328 1329 adapter->state = VNIC_CLOSING; 1330 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1331 if (rc) 1332 return rc; 1333 adapter->state = VNIC_CLOSED; 1334 return 0; 1335 } 1336 1337 static int ibmvnic_close(struct net_device *netdev) 1338 { 1339 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1340 int rc; 1341 1342 /* If device failover is pending, just set device state and return. 1343 * Device operation will be handled by reset routine. 1344 */ 1345 if (adapter->failover_pending) { 1346 adapter->state = VNIC_CLOSED; 1347 return 0; 1348 } 1349 1350 rc = __ibmvnic_close(netdev); 1351 ibmvnic_cleanup(netdev); 1352 1353 return rc; 1354 } 1355 1356 /** 1357 * build_hdr_data - creates L2/L3/L4 header data buffer 1358 * @hdr_field - bitfield determining needed headers 1359 * @skb - socket buffer 1360 * @hdr_len - array of header lengths 1361 * @tot_len - total length of data 1362 * 1363 * Reads hdr_field to determine which headers are needed by firmware. 1364 * Builds a buffer containing these headers. Saves individual header 1365 * lengths and total buffer length to be used to build descriptors. 1366 */ 1367 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1368 int *hdr_len, u8 *hdr_data) 1369 { 1370 int len = 0; 1371 u8 *hdr; 1372 1373 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1374 hdr_len[0] = sizeof(struct vlan_ethhdr); 1375 else 1376 hdr_len[0] = sizeof(struct ethhdr); 1377 1378 if (skb->protocol == htons(ETH_P_IP)) { 1379 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1380 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1381 hdr_len[2] = tcp_hdrlen(skb); 1382 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1383 hdr_len[2] = sizeof(struct udphdr); 1384 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1385 hdr_len[1] = sizeof(struct ipv6hdr); 1386 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1387 hdr_len[2] = tcp_hdrlen(skb); 1388 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1389 hdr_len[2] = sizeof(struct udphdr); 1390 } else if (skb->protocol == htons(ETH_P_ARP)) { 1391 hdr_len[1] = arp_hdr_len(skb->dev); 1392 hdr_len[2] = 0; 1393 } 1394 1395 memset(hdr_data, 0, 120); 1396 if ((hdr_field >> 6) & 1) { 1397 hdr = skb_mac_header(skb); 1398 memcpy(hdr_data, hdr, hdr_len[0]); 1399 len += hdr_len[0]; 1400 } 1401 1402 if ((hdr_field >> 5) & 1) { 1403 hdr = skb_network_header(skb); 1404 memcpy(hdr_data + len, hdr, hdr_len[1]); 1405 len += hdr_len[1]; 1406 } 1407 1408 if ((hdr_field >> 4) & 1) { 1409 hdr = skb_transport_header(skb); 1410 memcpy(hdr_data + len, hdr, hdr_len[2]); 1411 len += hdr_len[2]; 1412 } 1413 return len; 1414 } 1415 1416 /** 1417 * create_hdr_descs - create header and header extension descriptors 1418 * @hdr_field - bitfield determining needed headers 1419 * @data - buffer containing header data 1420 * @len - length of data buffer 1421 * @hdr_len - array of individual header lengths 1422 * @scrq_arr - descriptor array 1423 * 1424 * Creates header and, if needed, header extension descriptors and 1425 * places them in a descriptor array, scrq_arr 1426 */ 1427 1428 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1429 union sub_crq *scrq_arr) 1430 { 1431 union sub_crq hdr_desc; 1432 int tmp_len = len; 1433 int num_descs = 0; 1434 u8 *data, *cur; 1435 int tmp; 1436 1437 while (tmp_len > 0) { 1438 cur = hdr_data + len - tmp_len; 1439 1440 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1441 if (cur != hdr_data) { 1442 data = hdr_desc.hdr_ext.data; 1443 tmp = tmp_len > 29 ? 29 : tmp_len; 1444 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1445 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1446 hdr_desc.hdr_ext.len = tmp; 1447 } else { 1448 data = hdr_desc.hdr.data; 1449 tmp = tmp_len > 24 ? 24 : tmp_len; 1450 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1451 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1452 hdr_desc.hdr.len = tmp; 1453 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1454 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1455 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1456 hdr_desc.hdr.flag = hdr_field << 1; 1457 } 1458 memcpy(data, cur, tmp); 1459 tmp_len -= tmp; 1460 *scrq_arr = hdr_desc; 1461 scrq_arr++; 1462 num_descs++; 1463 } 1464 1465 return num_descs; 1466 } 1467 1468 /** 1469 * build_hdr_descs_arr - build a header descriptor array 1470 * @skb - socket buffer 1471 * @num_entries - number of descriptors to be sent 1472 * @subcrq - first TX descriptor 1473 * @hdr_field - bit field determining which headers will be sent 1474 * 1475 * This function will build a TX descriptor array with applicable 1476 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1477 */ 1478 1479 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1480 int *num_entries, u8 hdr_field) 1481 { 1482 int hdr_len[3] = {0, 0, 0}; 1483 int tot_len; 1484 u8 *hdr_data = txbuff->hdr_data; 1485 1486 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1487 txbuff->hdr_data); 1488 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1489 txbuff->indir_arr + 1); 1490 } 1491 1492 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1493 struct net_device *netdev) 1494 { 1495 /* For some backing devices, mishandling of small packets 1496 * can result in a loss of connection or TX stall. Device 1497 * architects recommend that no packet should be smaller 1498 * than the minimum MTU value provided to the driver, so 1499 * pad any packets to that length 1500 */ 1501 if (skb->len < netdev->min_mtu) 1502 return skb_put_padto(skb, netdev->min_mtu); 1503 1504 return 0; 1505 } 1506 1507 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1508 { 1509 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1510 int queue_num = skb_get_queue_mapping(skb); 1511 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1512 struct device *dev = &adapter->vdev->dev; 1513 struct ibmvnic_tx_buff *tx_buff = NULL; 1514 struct ibmvnic_sub_crq_queue *tx_scrq; 1515 struct ibmvnic_tx_pool *tx_pool; 1516 unsigned int tx_send_failed = 0; 1517 unsigned int tx_map_failed = 0; 1518 unsigned int tx_dropped = 0; 1519 unsigned int tx_packets = 0; 1520 unsigned int tx_bytes = 0; 1521 dma_addr_t data_dma_addr; 1522 struct netdev_queue *txq; 1523 unsigned long lpar_rc; 1524 union sub_crq tx_crq; 1525 unsigned int offset; 1526 int num_entries = 1; 1527 unsigned char *dst; 1528 int index = 0; 1529 u8 proto = 0; 1530 u64 handle; 1531 netdev_tx_t ret = NETDEV_TX_OK; 1532 1533 if (test_bit(0, &adapter->resetting)) { 1534 if (!netif_subqueue_stopped(netdev, skb)) 1535 netif_stop_subqueue(netdev, queue_num); 1536 dev_kfree_skb_any(skb); 1537 1538 tx_send_failed++; 1539 tx_dropped++; 1540 ret = NETDEV_TX_OK; 1541 goto out; 1542 } 1543 1544 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1545 tx_dropped++; 1546 tx_send_failed++; 1547 ret = NETDEV_TX_OK; 1548 goto out; 1549 } 1550 if (skb_is_gso(skb)) 1551 tx_pool = &adapter->tso_pool[queue_num]; 1552 else 1553 tx_pool = &adapter->tx_pool[queue_num]; 1554 1555 tx_scrq = adapter->tx_scrq[queue_num]; 1556 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1557 handle = tx_scrq->handle; 1558 1559 index = tx_pool->free_map[tx_pool->consumer_index]; 1560 1561 if (index == IBMVNIC_INVALID_MAP) { 1562 dev_kfree_skb_any(skb); 1563 tx_send_failed++; 1564 tx_dropped++; 1565 ret = NETDEV_TX_OK; 1566 goto out; 1567 } 1568 1569 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1570 1571 offset = index * tx_pool->buf_size; 1572 dst = tx_pool->long_term_buff.buff + offset; 1573 memset(dst, 0, tx_pool->buf_size); 1574 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1575 1576 if (skb_shinfo(skb)->nr_frags) { 1577 int cur, i; 1578 1579 /* Copy the head */ 1580 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1581 cur = skb_headlen(skb); 1582 1583 /* Copy the frags */ 1584 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1585 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1586 1587 memcpy(dst + cur, 1588 page_address(skb_frag_page(frag)) + 1589 skb_frag_off(frag), skb_frag_size(frag)); 1590 cur += skb_frag_size(frag); 1591 } 1592 } else { 1593 skb_copy_from_linear_data(skb, dst, skb->len); 1594 } 1595 1596 tx_pool->consumer_index = 1597 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1598 1599 tx_buff = &tx_pool->tx_buff[index]; 1600 tx_buff->skb = skb; 1601 tx_buff->data_dma[0] = data_dma_addr; 1602 tx_buff->data_len[0] = skb->len; 1603 tx_buff->index = index; 1604 tx_buff->pool_index = queue_num; 1605 tx_buff->last_frag = true; 1606 1607 memset(&tx_crq, 0, sizeof(tx_crq)); 1608 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1609 tx_crq.v1.type = IBMVNIC_TX_DESC; 1610 tx_crq.v1.n_crq_elem = 1; 1611 tx_crq.v1.n_sge = 1; 1612 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1613 1614 if (skb_is_gso(skb)) 1615 tx_crq.v1.correlator = 1616 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1617 else 1618 tx_crq.v1.correlator = cpu_to_be32(index); 1619 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1620 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1621 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1622 1623 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1624 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1625 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1626 } 1627 1628 if (skb->protocol == htons(ETH_P_IP)) { 1629 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1630 proto = ip_hdr(skb)->protocol; 1631 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1632 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1633 proto = ipv6_hdr(skb)->nexthdr; 1634 } 1635 1636 if (proto == IPPROTO_TCP) 1637 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1638 else if (proto == IPPROTO_UDP) 1639 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1640 1641 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1642 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1643 hdrs += 2; 1644 } 1645 if (skb_is_gso(skb)) { 1646 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1647 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1648 hdrs += 2; 1649 } 1650 /* determine if l2/3/4 headers are sent to firmware */ 1651 if ((*hdrs >> 7) & 1) { 1652 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1653 tx_crq.v1.n_crq_elem = num_entries; 1654 tx_buff->num_entries = num_entries; 1655 tx_buff->indir_arr[0] = tx_crq; 1656 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1657 sizeof(tx_buff->indir_arr), 1658 DMA_TO_DEVICE); 1659 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1660 dev_kfree_skb_any(skb); 1661 tx_buff->skb = NULL; 1662 if (!firmware_has_feature(FW_FEATURE_CMO)) 1663 dev_err(dev, "tx: unable to map descriptor array\n"); 1664 tx_map_failed++; 1665 tx_dropped++; 1666 ret = NETDEV_TX_OK; 1667 goto tx_err_out; 1668 } 1669 lpar_rc = send_subcrq_indirect(adapter, handle, 1670 (u64)tx_buff->indir_dma, 1671 (u64)num_entries); 1672 dma_unmap_single(dev, tx_buff->indir_dma, 1673 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE); 1674 } else { 1675 tx_buff->num_entries = num_entries; 1676 lpar_rc = send_subcrq(adapter, handle, 1677 &tx_crq); 1678 } 1679 if (lpar_rc != H_SUCCESS) { 1680 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1681 dev_err_ratelimited(dev, "tx: send failed\n"); 1682 dev_kfree_skb_any(skb); 1683 tx_buff->skb = NULL; 1684 1685 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1686 /* Disable TX and report carrier off if queue is closed 1687 * or pending failover. 1688 * Firmware guarantees that a signal will be sent to the 1689 * driver, triggering a reset or some other action. 1690 */ 1691 netif_tx_stop_all_queues(netdev); 1692 netif_carrier_off(netdev); 1693 } 1694 1695 tx_send_failed++; 1696 tx_dropped++; 1697 ret = NETDEV_TX_OK; 1698 goto tx_err_out; 1699 } 1700 1701 if (atomic_add_return(num_entries, &tx_scrq->used) 1702 >= adapter->req_tx_entries_per_subcrq) { 1703 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1704 netif_stop_subqueue(netdev, queue_num); 1705 } 1706 1707 tx_packets++; 1708 tx_bytes += skb->len; 1709 txq->trans_start = jiffies; 1710 ret = NETDEV_TX_OK; 1711 goto out; 1712 1713 tx_err_out: 1714 /* roll back consumer index and map array*/ 1715 if (tx_pool->consumer_index == 0) 1716 tx_pool->consumer_index = 1717 tx_pool->num_buffers - 1; 1718 else 1719 tx_pool->consumer_index--; 1720 tx_pool->free_map[tx_pool->consumer_index] = index; 1721 out: 1722 netdev->stats.tx_dropped += tx_dropped; 1723 netdev->stats.tx_bytes += tx_bytes; 1724 netdev->stats.tx_packets += tx_packets; 1725 adapter->tx_send_failed += tx_send_failed; 1726 adapter->tx_map_failed += tx_map_failed; 1727 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1728 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1729 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1730 1731 return ret; 1732 } 1733 1734 static void ibmvnic_set_multi(struct net_device *netdev) 1735 { 1736 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1737 struct netdev_hw_addr *ha; 1738 union ibmvnic_crq crq; 1739 1740 memset(&crq, 0, sizeof(crq)); 1741 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1742 crq.request_capability.cmd = REQUEST_CAPABILITY; 1743 1744 if (netdev->flags & IFF_PROMISC) { 1745 if (!adapter->promisc_supported) 1746 return; 1747 } else { 1748 if (netdev->flags & IFF_ALLMULTI) { 1749 /* Accept all multicast */ 1750 memset(&crq, 0, sizeof(crq)); 1751 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1752 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1753 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1754 ibmvnic_send_crq(adapter, &crq); 1755 } else if (netdev_mc_empty(netdev)) { 1756 /* Reject all multicast */ 1757 memset(&crq, 0, sizeof(crq)); 1758 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1759 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1760 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1761 ibmvnic_send_crq(adapter, &crq); 1762 } else { 1763 /* Accept one or more multicast(s) */ 1764 netdev_for_each_mc_addr(ha, netdev) { 1765 memset(&crq, 0, sizeof(crq)); 1766 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1767 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1768 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1769 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1770 ha->addr); 1771 ibmvnic_send_crq(adapter, &crq); 1772 } 1773 } 1774 } 1775 } 1776 1777 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1778 { 1779 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1780 union ibmvnic_crq crq; 1781 int rc; 1782 1783 if (!is_valid_ether_addr(dev_addr)) { 1784 rc = -EADDRNOTAVAIL; 1785 goto err; 1786 } 1787 1788 memset(&crq, 0, sizeof(crq)); 1789 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1790 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1791 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1792 1793 mutex_lock(&adapter->fw_lock); 1794 adapter->fw_done_rc = 0; 1795 reinit_completion(&adapter->fw_done); 1796 1797 rc = ibmvnic_send_crq(adapter, &crq); 1798 if (rc) { 1799 rc = -EIO; 1800 mutex_unlock(&adapter->fw_lock); 1801 goto err; 1802 } 1803 1804 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1805 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1806 if (rc || adapter->fw_done_rc) { 1807 rc = -EIO; 1808 mutex_unlock(&adapter->fw_lock); 1809 goto err; 1810 } 1811 mutex_unlock(&adapter->fw_lock); 1812 return 0; 1813 err: 1814 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1815 return rc; 1816 } 1817 1818 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1819 { 1820 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1821 struct sockaddr *addr = p; 1822 int rc; 1823 1824 rc = 0; 1825 if (!is_valid_ether_addr(addr->sa_data)) 1826 return -EADDRNOTAVAIL; 1827 1828 if (adapter->state != VNIC_PROBED) { 1829 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1830 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1831 } 1832 1833 return rc; 1834 } 1835 1836 /** 1837 * do_change_param_reset returns zero if we are able to keep processing reset 1838 * events, or non-zero if we hit a fatal error and must halt. 1839 */ 1840 static int do_change_param_reset(struct ibmvnic_adapter *adapter, 1841 struct ibmvnic_rwi *rwi, 1842 u32 reset_state) 1843 { 1844 struct net_device *netdev = adapter->netdev; 1845 int i, rc; 1846 1847 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n", 1848 rwi->reset_reason); 1849 1850 netif_carrier_off(netdev); 1851 adapter->reset_reason = rwi->reset_reason; 1852 1853 ibmvnic_cleanup(netdev); 1854 1855 if (reset_state == VNIC_OPEN) { 1856 rc = __ibmvnic_close(netdev); 1857 if (rc) 1858 goto out; 1859 } 1860 1861 release_resources(adapter); 1862 release_sub_crqs(adapter, 1); 1863 release_crq_queue(adapter); 1864 1865 adapter->state = VNIC_PROBED; 1866 1867 rc = init_crq_queue(adapter); 1868 1869 if (rc) { 1870 netdev_err(adapter->netdev, 1871 "Couldn't initialize crq. rc=%d\n", rc); 1872 return rc; 1873 } 1874 1875 rc = ibmvnic_reset_init(adapter, true); 1876 if (rc) { 1877 rc = IBMVNIC_INIT_FAILED; 1878 goto out; 1879 } 1880 1881 /* If the adapter was in PROBE state prior to the reset, 1882 * exit here. 1883 */ 1884 if (reset_state == VNIC_PROBED) 1885 goto out; 1886 1887 rc = ibmvnic_login(netdev); 1888 if (rc) { 1889 goto out; 1890 } 1891 1892 rc = init_resources(adapter); 1893 if (rc) 1894 goto out; 1895 1896 ibmvnic_disable_irqs(adapter); 1897 1898 adapter->state = VNIC_CLOSED; 1899 1900 if (reset_state == VNIC_CLOSED) 1901 return 0; 1902 1903 rc = __ibmvnic_open(netdev); 1904 if (rc) { 1905 rc = IBMVNIC_OPEN_FAILED; 1906 goto out; 1907 } 1908 1909 /* refresh device's multicast list */ 1910 ibmvnic_set_multi(netdev); 1911 1912 /* kick napi */ 1913 for (i = 0; i < adapter->req_rx_queues; i++) 1914 napi_schedule(&adapter->napi[i]); 1915 1916 out: 1917 if (rc) 1918 adapter->state = reset_state; 1919 return rc; 1920 } 1921 1922 /** 1923 * do_reset returns zero if we are able to keep processing reset events, or 1924 * non-zero if we hit a fatal error and must halt. 1925 */ 1926 static int do_reset(struct ibmvnic_adapter *adapter, 1927 struct ibmvnic_rwi *rwi, u32 reset_state) 1928 { 1929 u64 old_num_rx_queues, old_num_tx_queues; 1930 u64 old_num_rx_slots, old_num_tx_slots; 1931 struct net_device *netdev = adapter->netdev; 1932 int i, rc; 1933 1934 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1935 rwi->reset_reason); 1936 1937 rtnl_lock(); 1938 /* 1939 * Now that we have the rtnl lock, clear any pending failover. 1940 * This will ensure ibmvnic_open() has either completed or will 1941 * block until failover is complete. 1942 */ 1943 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 1944 adapter->failover_pending = false; 1945 1946 netif_carrier_off(netdev); 1947 adapter->reset_reason = rwi->reset_reason; 1948 1949 old_num_rx_queues = adapter->req_rx_queues; 1950 old_num_tx_queues = adapter->req_tx_queues; 1951 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1952 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1953 1954 ibmvnic_cleanup(netdev); 1955 1956 if (reset_state == VNIC_OPEN && 1957 adapter->reset_reason != VNIC_RESET_MOBILITY && 1958 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1959 adapter->state = VNIC_CLOSING; 1960 1961 /* Release the RTNL lock before link state change and 1962 * re-acquire after the link state change to allow 1963 * linkwatch_event to grab the RTNL lock and run during 1964 * a reset. 1965 */ 1966 rtnl_unlock(); 1967 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1968 rtnl_lock(); 1969 if (rc) 1970 goto out; 1971 1972 if (adapter->state != VNIC_CLOSING) { 1973 rc = -1; 1974 goto out; 1975 } 1976 1977 adapter->state = VNIC_CLOSED; 1978 } 1979 1980 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1981 /* remove the closed state so when we call open it appears 1982 * we are coming from the probed state. 1983 */ 1984 adapter->state = VNIC_PROBED; 1985 1986 if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1987 rc = ibmvnic_reenable_crq_queue(adapter); 1988 release_sub_crqs(adapter, 1); 1989 } else { 1990 rc = ibmvnic_reset_crq(adapter); 1991 if (rc == H_CLOSED || rc == H_SUCCESS) { 1992 rc = vio_enable_interrupts(adapter->vdev); 1993 if (rc) 1994 netdev_err(adapter->netdev, 1995 "Reset failed to enable interrupts. rc=%d\n", 1996 rc); 1997 } 1998 } 1999 2000 if (rc) { 2001 netdev_err(adapter->netdev, 2002 "Reset couldn't initialize crq. rc=%d\n", rc); 2003 goto out; 2004 } 2005 2006 rc = ibmvnic_reset_init(adapter, true); 2007 if (rc) { 2008 rc = IBMVNIC_INIT_FAILED; 2009 goto out; 2010 } 2011 2012 /* If the adapter was in PROBE state prior to the reset, 2013 * exit here. 2014 */ 2015 if (reset_state == VNIC_PROBED) { 2016 rc = 0; 2017 goto out; 2018 } 2019 2020 rc = ibmvnic_login(netdev); 2021 if (rc) { 2022 goto out; 2023 } 2024 2025 if (adapter->req_rx_queues != old_num_rx_queues || 2026 adapter->req_tx_queues != old_num_tx_queues || 2027 adapter->req_rx_add_entries_per_subcrq != 2028 old_num_rx_slots || 2029 adapter->req_tx_entries_per_subcrq != 2030 old_num_tx_slots || 2031 !adapter->rx_pool || 2032 !adapter->tso_pool || 2033 !adapter->tx_pool) { 2034 release_rx_pools(adapter); 2035 release_tx_pools(adapter); 2036 release_napi(adapter); 2037 release_vpd_data(adapter); 2038 2039 rc = init_resources(adapter); 2040 if (rc) 2041 goto out; 2042 2043 } else { 2044 rc = reset_tx_pools(adapter); 2045 if (rc) { 2046 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2047 rc); 2048 goto out; 2049 } 2050 2051 rc = reset_rx_pools(adapter); 2052 if (rc) { 2053 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2054 rc); 2055 goto out; 2056 } 2057 } 2058 ibmvnic_disable_irqs(adapter); 2059 } 2060 adapter->state = VNIC_CLOSED; 2061 2062 if (reset_state == VNIC_CLOSED) { 2063 rc = 0; 2064 goto out; 2065 } 2066 2067 rc = __ibmvnic_open(netdev); 2068 if (rc) { 2069 rc = IBMVNIC_OPEN_FAILED; 2070 goto out; 2071 } 2072 2073 /* refresh device's multicast list */ 2074 ibmvnic_set_multi(netdev); 2075 2076 /* kick napi */ 2077 for (i = 0; i < adapter->req_rx_queues; i++) 2078 napi_schedule(&adapter->napi[i]); 2079 2080 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2081 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2082 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2083 call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev); 2084 } 2085 2086 rc = 0; 2087 2088 out: 2089 /* restore the adapter state if reset failed */ 2090 if (rc) 2091 adapter->state = reset_state; 2092 rtnl_unlock(); 2093 2094 return rc; 2095 } 2096 2097 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2098 struct ibmvnic_rwi *rwi, u32 reset_state) 2099 { 2100 struct net_device *netdev = adapter->netdev; 2101 int rc; 2102 2103 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2104 rwi->reset_reason); 2105 2106 netif_carrier_off(netdev); 2107 adapter->reset_reason = rwi->reset_reason; 2108 2109 ibmvnic_cleanup(netdev); 2110 release_resources(adapter); 2111 release_sub_crqs(adapter, 0); 2112 release_crq_queue(adapter); 2113 2114 /* remove the closed state so when we call open it appears 2115 * we are coming from the probed state. 2116 */ 2117 adapter->state = VNIC_PROBED; 2118 2119 reinit_completion(&adapter->init_done); 2120 rc = init_crq_queue(adapter); 2121 if (rc) { 2122 netdev_err(adapter->netdev, 2123 "Couldn't initialize crq. rc=%d\n", rc); 2124 goto out; 2125 } 2126 2127 rc = ibmvnic_reset_init(adapter, false); 2128 if (rc) 2129 goto out; 2130 2131 /* If the adapter was in PROBE state prior to the reset, 2132 * exit here. 2133 */ 2134 if (reset_state == VNIC_PROBED) 2135 goto out; 2136 2137 rc = ibmvnic_login(netdev); 2138 if (rc) 2139 goto out; 2140 2141 rc = init_resources(adapter); 2142 if (rc) 2143 goto out; 2144 2145 ibmvnic_disable_irqs(adapter); 2146 adapter->state = VNIC_CLOSED; 2147 2148 if (reset_state == VNIC_CLOSED) 2149 goto out; 2150 2151 rc = __ibmvnic_open(netdev); 2152 if (rc) { 2153 rc = IBMVNIC_OPEN_FAILED; 2154 goto out; 2155 } 2156 2157 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2158 call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev); 2159 out: 2160 /* restore adapter state if reset failed */ 2161 if (rc) 2162 adapter->state = reset_state; 2163 return rc; 2164 } 2165 2166 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2167 { 2168 struct ibmvnic_rwi *rwi; 2169 unsigned long flags; 2170 2171 spin_lock_irqsave(&adapter->rwi_lock, flags); 2172 2173 if (!list_empty(&adapter->rwi_list)) { 2174 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2175 list); 2176 list_del(&rwi->list); 2177 } else { 2178 rwi = NULL; 2179 } 2180 2181 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2182 return rwi; 2183 } 2184 2185 static void __ibmvnic_reset(struct work_struct *work) 2186 { 2187 struct ibmvnic_rwi *rwi; 2188 struct ibmvnic_adapter *adapter; 2189 bool saved_state = false; 2190 unsigned long flags; 2191 u32 reset_state; 2192 int rc = 0; 2193 2194 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2195 2196 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2197 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2198 IBMVNIC_RESET_DELAY); 2199 return; 2200 } 2201 2202 rwi = get_next_rwi(adapter); 2203 while (rwi) { 2204 spin_lock_irqsave(&adapter->state_lock, flags); 2205 2206 if (adapter->state == VNIC_REMOVING || 2207 adapter->state == VNIC_REMOVED) { 2208 spin_unlock_irqrestore(&adapter->state_lock, flags); 2209 kfree(rwi); 2210 rc = EBUSY; 2211 break; 2212 } 2213 2214 if (!saved_state) { 2215 reset_state = adapter->state; 2216 saved_state = true; 2217 } 2218 spin_unlock_irqrestore(&adapter->state_lock, flags); 2219 2220 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2221 /* CHANGE_PARAM requestor holds rtnl_lock */ 2222 rc = do_change_param_reset(adapter, rwi, reset_state); 2223 } else if (adapter->force_reset_recovery) { 2224 /* 2225 * Since we are doing a hard reset now, clear the 2226 * failover_pending flag so we don't ignore any 2227 * future MOBILITY or other resets. 2228 */ 2229 adapter->failover_pending = false; 2230 2231 /* Transport event occurred during previous reset */ 2232 if (adapter->wait_for_reset) { 2233 /* Previous was CHANGE_PARAM; caller locked */ 2234 adapter->force_reset_recovery = false; 2235 rc = do_hard_reset(adapter, rwi, reset_state); 2236 } else { 2237 rtnl_lock(); 2238 adapter->force_reset_recovery = false; 2239 rc = do_hard_reset(adapter, rwi, reset_state); 2240 rtnl_unlock(); 2241 } 2242 if (rc) { 2243 /* give backing device time to settle down */ 2244 netdev_dbg(adapter->netdev, 2245 "[S:%d] Hard reset failed, waiting 60 secs\n", 2246 adapter->state); 2247 set_current_state(TASK_UNINTERRUPTIBLE); 2248 schedule_timeout(60 * HZ); 2249 } 2250 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL && 2251 adapter->from_passive_init)) { 2252 rc = do_reset(adapter, rwi, reset_state); 2253 } 2254 kfree(rwi); 2255 adapter->last_reset_time = jiffies; 2256 2257 if (rc) 2258 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2259 2260 rwi = get_next_rwi(adapter); 2261 2262 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2263 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2264 adapter->force_reset_recovery = true; 2265 } 2266 2267 if (adapter->wait_for_reset) { 2268 adapter->reset_done_rc = rc; 2269 complete(&adapter->reset_done); 2270 } 2271 2272 clear_bit_unlock(0, &adapter->resetting); 2273 } 2274 2275 static void __ibmvnic_delayed_reset(struct work_struct *work) 2276 { 2277 struct ibmvnic_adapter *adapter; 2278 2279 adapter = container_of(work, struct ibmvnic_adapter, 2280 ibmvnic_delayed_reset.work); 2281 __ibmvnic_reset(&adapter->ibmvnic_reset); 2282 } 2283 2284 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2285 enum ibmvnic_reset_reason reason) 2286 { 2287 struct list_head *entry, *tmp_entry; 2288 struct ibmvnic_rwi *rwi, *tmp; 2289 struct net_device *netdev = adapter->netdev; 2290 unsigned long flags; 2291 int ret; 2292 2293 /* 2294 * If failover is pending don't schedule any other reset. 2295 * Instead let the failover complete. If there is already a 2296 * a failover reset scheduled, we will detect and drop the 2297 * duplicate reset when walking the ->rwi_list below. 2298 */ 2299 if (adapter->state == VNIC_REMOVING || 2300 adapter->state == VNIC_REMOVED || 2301 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2302 ret = EBUSY; 2303 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2304 goto err; 2305 } 2306 2307 if (adapter->state == VNIC_PROBING) { 2308 netdev_warn(netdev, "Adapter reset during probe\n"); 2309 ret = adapter->init_done_rc = EAGAIN; 2310 goto err; 2311 } 2312 2313 spin_lock_irqsave(&adapter->rwi_lock, flags); 2314 2315 list_for_each(entry, &adapter->rwi_list) { 2316 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2317 if (tmp->reset_reason == reason) { 2318 netdev_dbg(netdev, "Skipping matching reset\n"); 2319 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2320 ret = EBUSY; 2321 goto err; 2322 } 2323 } 2324 2325 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2326 if (!rwi) { 2327 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2328 ibmvnic_close(netdev); 2329 ret = ENOMEM; 2330 goto err; 2331 } 2332 /* if we just received a transport event, 2333 * flush reset queue and process this reset 2334 */ 2335 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2336 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2337 list_del(entry); 2338 } 2339 rwi->reset_reason = reason; 2340 list_add_tail(&rwi->list, &adapter->rwi_list); 2341 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2342 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2343 schedule_work(&adapter->ibmvnic_reset); 2344 2345 return 0; 2346 err: 2347 return -ret; 2348 } 2349 2350 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2351 { 2352 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2353 2354 if (test_bit(0, &adapter->resetting)) { 2355 netdev_err(adapter->netdev, 2356 "Adapter is resetting, skip timeout reset\n"); 2357 return; 2358 } 2359 /* No queuing up reset until at least 5 seconds (default watchdog val) 2360 * after last reset 2361 */ 2362 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2363 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2364 return; 2365 } 2366 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2367 } 2368 2369 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2370 struct ibmvnic_rx_buff *rx_buff) 2371 { 2372 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2373 2374 rx_buff->skb = NULL; 2375 2376 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2377 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2378 2379 atomic_dec(&pool->available); 2380 } 2381 2382 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2383 { 2384 struct net_device *netdev = napi->dev; 2385 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2386 int scrq_num = (int)(napi - adapter->napi); 2387 int frames_processed = 0; 2388 2389 restart_poll: 2390 while (frames_processed < budget) { 2391 struct sk_buff *skb; 2392 struct ibmvnic_rx_buff *rx_buff; 2393 union sub_crq *next; 2394 u32 length; 2395 u16 offset; 2396 u8 flags = 0; 2397 2398 if (unlikely(test_bit(0, &adapter->resetting) && 2399 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2400 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2401 napi_complete_done(napi, frames_processed); 2402 return frames_processed; 2403 } 2404 2405 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2406 break; 2407 /* The queue entry at the current index is peeked at above 2408 * to determine that there is a valid descriptor awaiting 2409 * processing. We want to be sure that the current slot 2410 * holds a valid descriptor before reading its contents. 2411 */ 2412 dma_rmb(); 2413 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2414 rx_buff = 2415 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2416 rx_comp.correlator); 2417 /* do error checking */ 2418 if (next->rx_comp.rc) { 2419 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2420 be16_to_cpu(next->rx_comp.rc)); 2421 /* free the entry */ 2422 next->rx_comp.first = 0; 2423 dev_kfree_skb_any(rx_buff->skb); 2424 remove_buff_from_pool(adapter, rx_buff); 2425 continue; 2426 } else if (!rx_buff->skb) { 2427 /* free the entry */ 2428 next->rx_comp.first = 0; 2429 remove_buff_from_pool(adapter, rx_buff); 2430 continue; 2431 } 2432 2433 length = be32_to_cpu(next->rx_comp.len); 2434 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2435 flags = next->rx_comp.flags; 2436 skb = rx_buff->skb; 2437 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2438 length); 2439 2440 /* VLAN Header has been stripped by the system firmware and 2441 * needs to be inserted by the driver 2442 */ 2443 if (adapter->rx_vlan_header_insertion && 2444 (flags & IBMVNIC_VLAN_STRIPPED)) 2445 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2446 ntohs(next->rx_comp.vlan_tci)); 2447 2448 /* free the entry */ 2449 next->rx_comp.first = 0; 2450 remove_buff_from_pool(adapter, rx_buff); 2451 2452 skb_put(skb, length); 2453 skb->protocol = eth_type_trans(skb, netdev); 2454 skb_record_rx_queue(skb, scrq_num); 2455 2456 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2457 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2458 skb->ip_summed = CHECKSUM_UNNECESSARY; 2459 } 2460 2461 length = skb->len; 2462 napi_gro_receive(napi, skb); /* send it up */ 2463 netdev->stats.rx_packets++; 2464 netdev->stats.rx_bytes += length; 2465 adapter->rx_stats_buffers[scrq_num].packets++; 2466 adapter->rx_stats_buffers[scrq_num].bytes += length; 2467 frames_processed++; 2468 } 2469 2470 if (adapter->state != VNIC_CLOSING) 2471 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2472 2473 if (frames_processed < budget) { 2474 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2475 napi_complete_done(napi, frames_processed); 2476 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2477 napi_reschedule(napi)) { 2478 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2479 goto restart_poll; 2480 } 2481 } 2482 return frames_processed; 2483 } 2484 2485 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2486 { 2487 int rc, ret; 2488 2489 adapter->fallback.mtu = adapter->req_mtu; 2490 adapter->fallback.rx_queues = adapter->req_rx_queues; 2491 adapter->fallback.tx_queues = adapter->req_tx_queues; 2492 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2493 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2494 2495 reinit_completion(&adapter->reset_done); 2496 adapter->wait_for_reset = true; 2497 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2498 2499 if (rc) { 2500 ret = rc; 2501 goto out; 2502 } 2503 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2504 if (rc) { 2505 ret = -ENODEV; 2506 goto out; 2507 } 2508 2509 ret = 0; 2510 if (adapter->reset_done_rc) { 2511 ret = -EIO; 2512 adapter->desired.mtu = adapter->fallback.mtu; 2513 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2514 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2515 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2516 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2517 2518 reinit_completion(&adapter->reset_done); 2519 adapter->wait_for_reset = true; 2520 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2521 if (rc) { 2522 ret = rc; 2523 goto out; 2524 } 2525 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2526 60000); 2527 if (rc) { 2528 ret = -ENODEV; 2529 goto out; 2530 } 2531 } 2532 out: 2533 adapter->wait_for_reset = false; 2534 2535 return ret; 2536 } 2537 2538 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2539 { 2540 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2541 2542 adapter->desired.mtu = new_mtu + ETH_HLEN; 2543 2544 return wait_for_reset(adapter); 2545 } 2546 2547 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2548 struct net_device *dev, 2549 netdev_features_t features) 2550 { 2551 /* Some backing hardware adapters can not 2552 * handle packets with a MSS less than 224 2553 * or with only one segment. 2554 */ 2555 if (skb_is_gso(skb)) { 2556 if (skb_shinfo(skb)->gso_size < 224 || 2557 skb_shinfo(skb)->gso_segs == 1) 2558 features &= ~NETIF_F_GSO_MASK; 2559 } 2560 2561 return features; 2562 } 2563 2564 static const struct net_device_ops ibmvnic_netdev_ops = { 2565 .ndo_open = ibmvnic_open, 2566 .ndo_stop = ibmvnic_close, 2567 .ndo_start_xmit = ibmvnic_xmit, 2568 .ndo_set_rx_mode = ibmvnic_set_multi, 2569 .ndo_set_mac_address = ibmvnic_set_mac, 2570 .ndo_validate_addr = eth_validate_addr, 2571 .ndo_tx_timeout = ibmvnic_tx_timeout, 2572 .ndo_change_mtu = ibmvnic_change_mtu, 2573 .ndo_features_check = ibmvnic_features_check, 2574 }; 2575 2576 /* ethtool functions */ 2577 2578 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2579 struct ethtool_link_ksettings *cmd) 2580 { 2581 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2582 int rc; 2583 2584 rc = send_query_phys_parms(adapter); 2585 if (rc) { 2586 adapter->speed = SPEED_UNKNOWN; 2587 adapter->duplex = DUPLEX_UNKNOWN; 2588 } 2589 cmd->base.speed = adapter->speed; 2590 cmd->base.duplex = adapter->duplex; 2591 cmd->base.port = PORT_FIBRE; 2592 cmd->base.phy_address = 0; 2593 cmd->base.autoneg = AUTONEG_ENABLE; 2594 2595 return 0; 2596 } 2597 2598 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2599 struct ethtool_drvinfo *info) 2600 { 2601 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2602 2603 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2604 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2605 strlcpy(info->fw_version, adapter->fw_version, 2606 sizeof(info->fw_version)); 2607 } 2608 2609 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2610 { 2611 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2612 2613 return adapter->msg_enable; 2614 } 2615 2616 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2617 { 2618 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2619 2620 adapter->msg_enable = data; 2621 } 2622 2623 static u32 ibmvnic_get_link(struct net_device *netdev) 2624 { 2625 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2626 2627 /* Don't need to send a query because we request a logical link up at 2628 * init and then we wait for link state indications 2629 */ 2630 return adapter->logical_link_state; 2631 } 2632 2633 static void ibmvnic_get_ringparam(struct net_device *netdev, 2634 struct ethtool_ringparam *ring) 2635 { 2636 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2637 2638 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2639 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2640 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2641 } else { 2642 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2643 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2644 } 2645 ring->rx_mini_max_pending = 0; 2646 ring->rx_jumbo_max_pending = 0; 2647 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2648 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2649 ring->rx_mini_pending = 0; 2650 ring->rx_jumbo_pending = 0; 2651 } 2652 2653 static int ibmvnic_set_ringparam(struct net_device *netdev, 2654 struct ethtool_ringparam *ring) 2655 { 2656 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2657 int ret; 2658 2659 ret = 0; 2660 adapter->desired.rx_entries = ring->rx_pending; 2661 adapter->desired.tx_entries = ring->tx_pending; 2662 2663 ret = wait_for_reset(adapter); 2664 2665 if (!ret && 2666 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2667 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2668 netdev_info(netdev, 2669 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2670 ring->rx_pending, ring->tx_pending, 2671 adapter->req_rx_add_entries_per_subcrq, 2672 adapter->req_tx_entries_per_subcrq); 2673 return ret; 2674 } 2675 2676 static void ibmvnic_get_channels(struct net_device *netdev, 2677 struct ethtool_channels *channels) 2678 { 2679 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2680 2681 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2682 channels->max_rx = adapter->max_rx_queues; 2683 channels->max_tx = adapter->max_tx_queues; 2684 } else { 2685 channels->max_rx = IBMVNIC_MAX_QUEUES; 2686 channels->max_tx = IBMVNIC_MAX_QUEUES; 2687 } 2688 2689 channels->max_other = 0; 2690 channels->max_combined = 0; 2691 channels->rx_count = adapter->req_rx_queues; 2692 channels->tx_count = adapter->req_tx_queues; 2693 channels->other_count = 0; 2694 channels->combined_count = 0; 2695 } 2696 2697 static int ibmvnic_set_channels(struct net_device *netdev, 2698 struct ethtool_channels *channels) 2699 { 2700 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2701 int ret; 2702 2703 ret = 0; 2704 adapter->desired.rx_queues = channels->rx_count; 2705 adapter->desired.tx_queues = channels->tx_count; 2706 2707 ret = wait_for_reset(adapter); 2708 2709 if (!ret && 2710 (adapter->req_rx_queues != channels->rx_count || 2711 adapter->req_tx_queues != channels->tx_count)) 2712 netdev_info(netdev, 2713 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2714 channels->rx_count, channels->tx_count, 2715 adapter->req_rx_queues, adapter->req_tx_queues); 2716 return ret; 2717 2718 } 2719 2720 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2721 { 2722 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2723 int i; 2724 2725 switch (stringset) { 2726 case ETH_SS_STATS: 2727 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2728 i++, data += ETH_GSTRING_LEN) 2729 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2730 2731 for (i = 0; i < adapter->req_tx_queues; i++) { 2732 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2733 data += ETH_GSTRING_LEN; 2734 2735 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2736 data += ETH_GSTRING_LEN; 2737 2738 snprintf(data, ETH_GSTRING_LEN, 2739 "tx%d_dropped_packets", i); 2740 data += ETH_GSTRING_LEN; 2741 } 2742 2743 for (i = 0; i < adapter->req_rx_queues; i++) { 2744 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2745 data += ETH_GSTRING_LEN; 2746 2747 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2748 data += ETH_GSTRING_LEN; 2749 2750 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2751 data += ETH_GSTRING_LEN; 2752 } 2753 break; 2754 2755 case ETH_SS_PRIV_FLAGS: 2756 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2757 strcpy(data + i * ETH_GSTRING_LEN, 2758 ibmvnic_priv_flags[i]); 2759 break; 2760 default: 2761 return; 2762 } 2763 } 2764 2765 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2766 { 2767 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2768 2769 switch (sset) { 2770 case ETH_SS_STATS: 2771 return ARRAY_SIZE(ibmvnic_stats) + 2772 adapter->req_tx_queues * NUM_TX_STATS + 2773 adapter->req_rx_queues * NUM_RX_STATS; 2774 case ETH_SS_PRIV_FLAGS: 2775 return ARRAY_SIZE(ibmvnic_priv_flags); 2776 default: 2777 return -EOPNOTSUPP; 2778 } 2779 } 2780 2781 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2782 struct ethtool_stats *stats, u64 *data) 2783 { 2784 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2785 union ibmvnic_crq crq; 2786 int i, j; 2787 int rc; 2788 2789 memset(&crq, 0, sizeof(crq)); 2790 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2791 crq.request_statistics.cmd = REQUEST_STATISTICS; 2792 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2793 crq.request_statistics.len = 2794 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2795 2796 /* Wait for data to be written */ 2797 reinit_completion(&adapter->stats_done); 2798 rc = ibmvnic_send_crq(adapter, &crq); 2799 if (rc) 2800 return; 2801 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2802 if (rc) 2803 return; 2804 2805 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2806 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2807 ibmvnic_stats[i].offset)); 2808 2809 for (j = 0; j < adapter->req_tx_queues; j++) { 2810 data[i] = adapter->tx_stats_buffers[j].packets; 2811 i++; 2812 data[i] = adapter->tx_stats_buffers[j].bytes; 2813 i++; 2814 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2815 i++; 2816 } 2817 2818 for (j = 0; j < adapter->req_rx_queues; j++) { 2819 data[i] = adapter->rx_stats_buffers[j].packets; 2820 i++; 2821 data[i] = adapter->rx_stats_buffers[j].bytes; 2822 i++; 2823 data[i] = adapter->rx_stats_buffers[j].interrupts; 2824 i++; 2825 } 2826 } 2827 2828 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2829 { 2830 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2831 2832 return adapter->priv_flags; 2833 } 2834 2835 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2836 { 2837 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2838 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2839 2840 if (which_maxes) 2841 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2842 else 2843 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2844 2845 return 0; 2846 } 2847 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2848 .get_drvinfo = ibmvnic_get_drvinfo, 2849 .get_msglevel = ibmvnic_get_msglevel, 2850 .set_msglevel = ibmvnic_set_msglevel, 2851 .get_link = ibmvnic_get_link, 2852 .get_ringparam = ibmvnic_get_ringparam, 2853 .set_ringparam = ibmvnic_set_ringparam, 2854 .get_channels = ibmvnic_get_channels, 2855 .set_channels = ibmvnic_set_channels, 2856 .get_strings = ibmvnic_get_strings, 2857 .get_sset_count = ibmvnic_get_sset_count, 2858 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2859 .get_link_ksettings = ibmvnic_get_link_ksettings, 2860 .get_priv_flags = ibmvnic_get_priv_flags, 2861 .set_priv_flags = ibmvnic_set_priv_flags, 2862 }; 2863 2864 /* Routines for managing CRQs/sCRQs */ 2865 2866 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2867 struct ibmvnic_sub_crq_queue *scrq) 2868 { 2869 int rc; 2870 2871 if (!scrq) { 2872 netdev_dbg(adapter->netdev, 2873 "Invalid scrq reset. irq (%d) or msgs (%p).\n", 2874 scrq->irq, scrq->msgs); 2875 return -EINVAL; 2876 } 2877 2878 if (scrq->irq) { 2879 free_irq(scrq->irq, scrq); 2880 irq_dispose_mapping(scrq->irq); 2881 scrq->irq = 0; 2882 } 2883 if (scrq->msgs) { 2884 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2885 atomic_set(&scrq->used, 0); 2886 scrq->cur = 0; 2887 } else { 2888 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 2889 return -EINVAL; 2890 } 2891 2892 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2893 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2894 return rc; 2895 } 2896 2897 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2898 { 2899 int i, rc; 2900 2901 if (!adapter->tx_scrq || !adapter->rx_scrq) 2902 return -EINVAL; 2903 2904 for (i = 0; i < adapter->req_tx_queues; i++) { 2905 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2906 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2907 if (rc) 2908 return rc; 2909 } 2910 2911 for (i = 0; i < adapter->req_rx_queues; i++) { 2912 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2913 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2914 if (rc) 2915 return rc; 2916 } 2917 2918 return rc; 2919 } 2920 2921 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2922 struct ibmvnic_sub_crq_queue *scrq, 2923 bool do_h_free) 2924 { 2925 struct device *dev = &adapter->vdev->dev; 2926 long rc; 2927 2928 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2929 2930 if (do_h_free) { 2931 /* Close the sub-crqs */ 2932 do { 2933 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2934 adapter->vdev->unit_address, 2935 scrq->crq_num); 2936 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2937 2938 if (rc) { 2939 netdev_err(adapter->netdev, 2940 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2941 scrq->crq_num, rc); 2942 } 2943 } 2944 2945 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2946 DMA_BIDIRECTIONAL); 2947 free_pages((unsigned long)scrq->msgs, 2); 2948 kfree(scrq); 2949 } 2950 2951 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2952 *adapter) 2953 { 2954 struct device *dev = &adapter->vdev->dev; 2955 struct ibmvnic_sub_crq_queue *scrq; 2956 int rc; 2957 2958 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2959 if (!scrq) 2960 return NULL; 2961 2962 scrq->msgs = 2963 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2964 if (!scrq->msgs) { 2965 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2966 goto zero_page_failed; 2967 } 2968 2969 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2970 DMA_BIDIRECTIONAL); 2971 if (dma_mapping_error(dev, scrq->msg_token)) { 2972 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2973 goto map_failed; 2974 } 2975 2976 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2977 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2978 2979 if (rc == H_RESOURCE) 2980 rc = ibmvnic_reset_crq(adapter); 2981 2982 if (rc == H_CLOSED) { 2983 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2984 } else if (rc) { 2985 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2986 goto reg_failed; 2987 } 2988 2989 scrq->adapter = adapter; 2990 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2991 spin_lock_init(&scrq->lock); 2992 2993 netdev_dbg(adapter->netdev, 2994 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2995 scrq->crq_num, scrq->hw_irq, scrq->irq); 2996 2997 return scrq; 2998 2999 reg_failed: 3000 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3001 DMA_BIDIRECTIONAL); 3002 map_failed: 3003 free_pages((unsigned long)scrq->msgs, 2); 3004 zero_page_failed: 3005 kfree(scrq); 3006 3007 return NULL; 3008 } 3009 3010 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3011 { 3012 int i; 3013 3014 if (adapter->tx_scrq) { 3015 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3016 if (!adapter->tx_scrq[i]) 3017 continue; 3018 3019 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3020 i); 3021 if (adapter->tx_scrq[i]->irq) { 3022 free_irq(adapter->tx_scrq[i]->irq, 3023 adapter->tx_scrq[i]); 3024 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3025 adapter->tx_scrq[i]->irq = 0; 3026 } 3027 3028 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3029 do_h_free); 3030 } 3031 3032 kfree(adapter->tx_scrq); 3033 adapter->tx_scrq = NULL; 3034 adapter->num_active_tx_scrqs = 0; 3035 } 3036 3037 if (adapter->rx_scrq) { 3038 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3039 if (!adapter->rx_scrq[i]) 3040 continue; 3041 3042 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3043 i); 3044 if (adapter->rx_scrq[i]->irq) { 3045 free_irq(adapter->rx_scrq[i]->irq, 3046 adapter->rx_scrq[i]); 3047 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3048 adapter->rx_scrq[i]->irq = 0; 3049 } 3050 3051 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3052 do_h_free); 3053 } 3054 3055 kfree(adapter->rx_scrq); 3056 adapter->rx_scrq = NULL; 3057 adapter->num_active_rx_scrqs = 0; 3058 } 3059 } 3060 3061 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3062 struct ibmvnic_sub_crq_queue *scrq) 3063 { 3064 struct device *dev = &adapter->vdev->dev; 3065 unsigned long rc; 3066 3067 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3068 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3069 if (rc) 3070 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3071 scrq->hw_irq, rc); 3072 return rc; 3073 } 3074 3075 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3076 struct ibmvnic_sub_crq_queue *scrq) 3077 { 3078 struct device *dev = &adapter->vdev->dev; 3079 unsigned long rc; 3080 3081 if (scrq->hw_irq > 0x100000000ULL) { 3082 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3083 return 1; 3084 } 3085 3086 if (test_bit(0, &adapter->resetting) && 3087 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3088 u64 val = (0xff000000) | scrq->hw_irq; 3089 3090 rc = plpar_hcall_norets(H_EOI, val); 3091 /* H_EOI would fail with rc = H_FUNCTION when running 3092 * in XIVE mode which is expected, but not an error. 3093 */ 3094 if (rc && (rc != H_FUNCTION)) 3095 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3096 val, rc); 3097 } 3098 3099 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3100 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3101 if (rc) 3102 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3103 scrq->hw_irq, rc); 3104 return rc; 3105 } 3106 3107 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3108 struct ibmvnic_sub_crq_queue *scrq) 3109 { 3110 struct device *dev = &adapter->vdev->dev; 3111 struct ibmvnic_tx_pool *tx_pool; 3112 struct ibmvnic_tx_buff *txbuff; 3113 union sub_crq *next; 3114 int index; 3115 int i, j; 3116 3117 restart_loop: 3118 while (pending_scrq(adapter, scrq)) { 3119 unsigned int pool = scrq->pool_index; 3120 int num_entries = 0; 3121 3122 /* The queue entry at the current index is peeked at above 3123 * to determine that there is a valid descriptor awaiting 3124 * processing. We want to be sure that the current slot 3125 * holds a valid descriptor before reading its contents. 3126 */ 3127 dma_rmb(); 3128 3129 next = ibmvnic_next_scrq(adapter, scrq); 3130 for (i = 0; i < next->tx_comp.num_comps; i++) { 3131 if (next->tx_comp.rcs[i]) 3132 dev_err(dev, "tx error %x\n", 3133 next->tx_comp.rcs[i]); 3134 index = be32_to_cpu(next->tx_comp.correlators[i]); 3135 if (index & IBMVNIC_TSO_POOL_MASK) { 3136 tx_pool = &adapter->tso_pool[pool]; 3137 index &= ~IBMVNIC_TSO_POOL_MASK; 3138 } else { 3139 tx_pool = &adapter->tx_pool[pool]; 3140 } 3141 3142 txbuff = &tx_pool->tx_buff[index]; 3143 3144 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 3145 if (!txbuff->data_dma[j]) 3146 continue; 3147 3148 txbuff->data_dma[j] = 0; 3149 } 3150 3151 if (txbuff->last_frag) { 3152 dev_kfree_skb_any(txbuff->skb); 3153 txbuff->skb = NULL; 3154 } 3155 3156 num_entries += txbuff->num_entries; 3157 3158 tx_pool->free_map[tx_pool->producer_index] = index; 3159 tx_pool->producer_index = 3160 (tx_pool->producer_index + 1) % 3161 tx_pool->num_buffers; 3162 } 3163 /* remove tx_comp scrq*/ 3164 next->tx_comp.first = 0; 3165 3166 if (atomic_sub_return(num_entries, &scrq->used) <= 3167 (adapter->req_tx_entries_per_subcrq / 2) && 3168 __netif_subqueue_stopped(adapter->netdev, 3169 scrq->pool_index)) { 3170 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3171 netdev_dbg(adapter->netdev, "Started queue %d\n", 3172 scrq->pool_index); 3173 } 3174 } 3175 3176 enable_scrq_irq(adapter, scrq); 3177 3178 if (pending_scrq(adapter, scrq)) { 3179 disable_scrq_irq(adapter, scrq); 3180 goto restart_loop; 3181 } 3182 3183 return 0; 3184 } 3185 3186 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3187 { 3188 struct ibmvnic_sub_crq_queue *scrq = instance; 3189 struct ibmvnic_adapter *adapter = scrq->adapter; 3190 3191 disable_scrq_irq(adapter, scrq); 3192 ibmvnic_complete_tx(adapter, scrq); 3193 3194 return IRQ_HANDLED; 3195 } 3196 3197 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3198 { 3199 struct ibmvnic_sub_crq_queue *scrq = instance; 3200 struct ibmvnic_adapter *adapter = scrq->adapter; 3201 3202 /* When booting a kdump kernel we can hit pending interrupts 3203 * prior to completing driver initialization. 3204 */ 3205 if (unlikely(adapter->state != VNIC_OPEN)) 3206 return IRQ_NONE; 3207 3208 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3209 3210 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3211 disable_scrq_irq(adapter, scrq); 3212 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3213 } 3214 3215 return IRQ_HANDLED; 3216 } 3217 3218 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3219 { 3220 struct device *dev = &adapter->vdev->dev; 3221 struct ibmvnic_sub_crq_queue *scrq; 3222 int i = 0, j = 0; 3223 int rc = 0; 3224 3225 for (i = 0; i < adapter->req_tx_queues; i++) { 3226 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3227 i); 3228 scrq = adapter->tx_scrq[i]; 3229 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3230 3231 if (!scrq->irq) { 3232 rc = -EINVAL; 3233 dev_err(dev, "Error mapping irq\n"); 3234 goto req_tx_irq_failed; 3235 } 3236 3237 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3238 adapter->vdev->unit_address, i); 3239 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3240 0, scrq->name, scrq); 3241 3242 if (rc) { 3243 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3244 scrq->irq, rc); 3245 irq_dispose_mapping(scrq->irq); 3246 goto req_tx_irq_failed; 3247 } 3248 } 3249 3250 for (i = 0; i < adapter->req_rx_queues; i++) { 3251 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3252 i); 3253 scrq = adapter->rx_scrq[i]; 3254 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3255 if (!scrq->irq) { 3256 rc = -EINVAL; 3257 dev_err(dev, "Error mapping irq\n"); 3258 goto req_rx_irq_failed; 3259 } 3260 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3261 adapter->vdev->unit_address, i); 3262 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3263 0, scrq->name, scrq); 3264 if (rc) { 3265 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3266 scrq->irq, rc); 3267 irq_dispose_mapping(scrq->irq); 3268 goto req_rx_irq_failed; 3269 } 3270 } 3271 return rc; 3272 3273 req_rx_irq_failed: 3274 for (j = 0; j < i; j++) { 3275 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3276 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3277 } 3278 i = adapter->req_tx_queues; 3279 req_tx_irq_failed: 3280 for (j = 0; j < i; j++) { 3281 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3282 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3283 } 3284 release_sub_crqs(adapter, 1); 3285 return rc; 3286 } 3287 3288 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3289 { 3290 struct device *dev = &adapter->vdev->dev; 3291 struct ibmvnic_sub_crq_queue **allqueues; 3292 int registered_queues = 0; 3293 int total_queues; 3294 int more = 0; 3295 int i; 3296 3297 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3298 3299 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3300 if (!allqueues) 3301 return -1; 3302 3303 for (i = 0; i < total_queues; i++) { 3304 allqueues[i] = init_sub_crq_queue(adapter); 3305 if (!allqueues[i]) { 3306 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3307 break; 3308 } 3309 registered_queues++; 3310 } 3311 3312 /* Make sure we were able to register the minimum number of queues */ 3313 if (registered_queues < 3314 adapter->min_tx_queues + adapter->min_rx_queues) { 3315 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3316 goto tx_failed; 3317 } 3318 3319 /* Distribute the failed allocated queues*/ 3320 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3321 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3322 switch (i % 3) { 3323 case 0: 3324 if (adapter->req_rx_queues > adapter->min_rx_queues) 3325 adapter->req_rx_queues--; 3326 else 3327 more++; 3328 break; 3329 case 1: 3330 if (adapter->req_tx_queues > adapter->min_tx_queues) 3331 adapter->req_tx_queues--; 3332 else 3333 more++; 3334 break; 3335 } 3336 } 3337 3338 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3339 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3340 if (!adapter->tx_scrq) 3341 goto tx_failed; 3342 3343 for (i = 0; i < adapter->req_tx_queues; i++) { 3344 adapter->tx_scrq[i] = allqueues[i]; 3345 adapter->tx_scrq[i]->pool_index = i; 3346 adapter->num_active_tx_scrqs++; 3347 } 3348 3349 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3350 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3351 if (!adapter->rx_scrq) 3352 goto rx_failed; 3353 3354 for (i = 0; i < adapter->req_rx_queues; i++) { 3355 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3356 adapter->rx_scrq[i]->scrq_num = i; 3357 adapter->num_active_rx_scrqs++; 3358 } 3359 3360 kfree(allqueues); 3361 return 0; 3362 3363 rx_failed: 3364 kfree(adapter->tx_scrq); 3365 adapter->tx_scrq = NULL; 3366 tx_failed: 3367 for (i = 0; i < registered_queues; i++) 3368 release_sub_crq_queue(adapter, allqueues[i], 1); 3369 kfree(allqueues); 3370 return -1; 3371 } 3372 3373 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3374 { 3375 struct device *dev = &adapter->vdev->dev; 3376 union ibmvnic_crq crq; 3377 int max_entries; 3378 3379 if (!retry) { 3380 /* Sub-CRQ entries are 32 byte long */ 3381 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3382 3383 if (adapter->min_tx_entries_per_subcrq > entries_page || 3384 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3385 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3386 return; 3387 } 3388 3389 if (adapter->desired.mtu) 3390 adapter->req_mtu = adapter->desired.mtu; 3391 else 3392 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3393 3394 if (!adapter->desired.tx_entries) 3395 adapter->desired.tx_entries = 3396 adapter->max_tx_entries_per_subcrq; 3397 if (!adapter->desired.rx_entries) 3398 adapter->desired.rx_entries = 3399 adapter->max_rx_add_entries_per_subcrq; 3400 3401 max_entries = IBMVNIC_MAX_LTB_SIZE / 3402 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3403 3404 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3405 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3406 adapter->desired.tx_entries = max_entries; 3407 } 3408 3409 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3410 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3411 adapter->desired.rx_entries = max_entries; 3412 } 3413 3414 if (adapter->desired.tx_entries) 3415 adapter->req_tx_entries_per_subcrq = 3416 adapter->desired.tx_entries; 3417 else 3418 adapter->req_tx_entries_per_subcrq = 3419 adapter->max_tx_entries_per_subcrq; 3420 3421 if (adapter->desired.rx_entries) 3422 adapter->req_rx_add_entries_per_subcrq = 3423 adapter->desired.rx_entries; 3424 else 3425 adapter->req_rx_add_entries_per_subcrq = 3426 adapter->max_rx_add_entries_per_subcrq; 3427 3428 if (adapter->desired.tx_queues) 3429 adapter->req_tx_queues = 3430 adapter->desired.tx_queues; 3431 else 3432 adapter->req_tx_queues = 3433 adapter->opt_tx_comp_sub_queues; 3434 3435 if (adapter->desired.rx_queues) 3436 adapter->req_rx_queues = 3437 adapter->desired.rx_queues; 3438 else 3439 adapter->req_rx_queues = 3440 adapter->opt_rx_comp_queues; 3441 3442 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3443 } 3444 3445 memset(&crq, 0, sizeof(crq)); 3446 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3447 crq.request_capability.cmd = REQUEST_CAPABILITY; 3448 3449 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3450 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3451 atomic_inc(&adapter->running_cap_crqs); 3452 ibmvnic_send_crq(adapter, &crq); 3453 3454 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3455 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3456 atomic_inc(&adapter->running_cap_crqs); 3457 ibmvnic_send_crq(adapter, &crq); 3458 3459 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3460 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3461 atomic_inc(&adapter->running_cap_crqs); 3462 ibmvnic_send_crq(adapter, &crq); 3463 3464 crq.request_capability.capability = 3465 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3466 crq.request_capability.number = 3467 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3468 atomic_inc(&adapter->running_cap_crqs); 3469 ibmvnic_send_crq(adapter, &crq); 3470 3471 crq.request_capability.capability = 3472 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3473 crq.request_capability.number = 3474 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3475 atomic_inc(&adapter->running_cap_crqs); 3476 ibmvnic_send_crq(adapter, &crq); 3477 3478 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3479 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3480 atomic_inc(&adapter->running_cap_crqs); 3481 ibmvnic_send_crq(adapter, &crq); 3482 3483 if (adapter->netdev->flags & IFF_PROMISC) { 3484 if (adapter->promisc_supported) { 3485 crq.request_capability.capability = 3486 cpu_to_be16(PROMISC_REQUESTED); 3487 crq.request_capability.number = cpu_to_be64(1); 3488 atomic_inc(&adapter->running_cap_crqs); 3489 ibmvnic_send_crq(adapter, &crq); 3490 } 3491 } else { 3492 crq.request_capability.capability = 3493 cpu_to_be16(PROMISC_REQUESTED); 3494 crq.request_capability.number = cpu_to_be64(0); 3495 atomic_inc(&adapter->running_cap_crqs); 3496 ibmvnic_send_crq(adapter, &crq); 3497 } 3498 } 3499 3500 static int pending_scrq(struct ibmvnic_adapter *adapter, 3501 struct ibmvnic_sub_crq_queue *scrq) 3502 { 3503 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3504 3505 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3506 return 1; 3507 else 3508 return 0; 3509 } 3510 3511 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3512 struct ibmvnic_sub_crq_queue *scrq) 3513 { 3514 union sub_crq *entry; 3515 unsigned long flags; 3516 3517 spin_lock_irqsave(&scrq->lock, flags); 3518 entry = &scrq->msgs[scrq->cur]; 3519 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3520 if (++scrq->cur == scrq->size) 3521 scrq->cur = 0; 3522 } else { 3523 entry = NULL; 3524 } 3525 spin_unlock_irqrestore(&scrq->lock, flags); 3526 3527 /* Ensure that the entire buffer descriptor has been 3528 * loaded before reading its contents 3529 */ 3530 dma_rmb(); 3531 3532 return entry; 3533 } 3534 3535 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3536 { 3537 struct ibmvnic_crq_queue *queue = &adapter->crq; 3538 union ibmvnic_crq *crq; 3539 3540 crq = &queue->msgs[queue->cur]; 3541 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3542 if (++queue->cur == queue->size) 3543 queue->cur = 0; 3544 } else { 3545 crq = NULL; 3546 } 3547 3548 return crq; 3549 } 3550 3551 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3552 { 3553 switch (rc) { 3554 case H_PARAMETER: 3555 dev_warn_ratelimited(dev, 3556 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3557 func, rc); 3558 break; 3559 case H_CLOSED: 3560 dev_warn_ratelimited(dev, 3561 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3562 func, rc); 3563 break; 3564 default: 3565 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3566 break; 3567 } 3568 } 3569 3570 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3571 union sub_crq *sub_crq) 3572 { 3573 unsigned int ua = adapter->vdev->unit_address; 3574 struct device *dev = &adapter->vdev->dev; 3575 u64 *u64_crq = (u64 *)sub_crq; 3576 int rc; 3577 3578 netdev_dbg(adapter->netdev, 3579 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3580 (unsigned long int)cpu_to_be64(remote_handle), 3581 (unsigned long int)cpu_to_be64(u64_crq[0]), 3582 (unsigned long int)cpu_to_be64(u64_crq[1]), 3583 (unsigned long int)cpu_to_be64(u64_crq[2]), 3584 (unsigned long int)cpu_to_be64(u64_crq[3])); 3585 3586 /* Make sure the hypervisor sees the complete request */ 3587 mb(); 3588 3589 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3590 cpu_to_be64(remote_handle), 3591 cpu_to_be64(u64_crq[0]), 3592 cpu_to_be64(u64_crq[1]), 3593 cpu_to_be64(u64_crq[2]), 3594 cpu_to_be64(u64_crq[3])); 3595 3596 if (rc) 3597 print_subcrq_error(dev, rc, __func__); 3598 3599 return rc; 3600 } 3601 3602 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3603 u64 remote_handle, u64 ioba, u64 num_entries) 3604 { 3605 unsigned int ua = adapter->vdev->unit_address; 3606 struct device *dev = &adapter->vdev->dev; 3607 int rc; 3608 3609 /* Make sure the hypervisor sees the complete request */ 3610 mb(); 3611 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3612 cpu_to_be64(remote_handle), 3613 ioba, num_entries); 3614 3615 if (rc) 3616 print_subcrq_error(dev, rc, __func__); 3617 3618 return rc; 3619 } 3620 3621 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3622 union ibmvnic_crq *crq) 3623 { 3624 unsigned int ua = adapter->vdev->unit_address; 3625 struct device *dev = &adapter->vdev->dev; 3626 u64 *u64_crq = (u64 *)crq; 3627 int rc; 3628 3629 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3630 (unsigned long int)cpu_to_be64(u64_crq[0]), 3631 (unsigned long int)cpu_to_be64(u64_crq[1])); 3632 3633 if (!adapter->crq.active && 3634 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3635 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3636 return -EINVAL; 3637 } 3638 3639 /* Make sure the hypervisor sees the complete request */ 3640 mb(); 3641 3642 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3643 cpu_to_be64(u64_crq[0]), 3644 cpu_to_be64(u64_crq[1])); 3645 3646 if (rc) { 3647 if (rc == H_CLOSED) { 3648 dev_warn(dev, "CRQ Queue closed\n"); 3649 /* do not reset, report the fail, wait for passive init from server */ 3650 } 3651 3652 dev_warn(dev, "Send error (rc=%d)\n", rc); 3653 } 3654 3655 return rc; 3656 } 3657 3658 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3659 { 3660 struct device *dev = &adapter->vdev->dev; 3661 union ibmvnic_crq crq; 3662 int retries = 100; 3663 int rc; 3664 3665 memset(&crq, 0, sizeof(crq)); 3666 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3667 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3668 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3669 3670 do { 3671 rc = ibmvnic_send_crq(adapter, &crq); 3672 if (rc != H_CLOSED) 3673 break; 3674 retries--; 3675 msleep(50); 3676 3677 } while (retries > 0); 3678 3679 if (rc) { 3680 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3681 return rc; 3682 } 3683 3684 return 0; 3685 } 3686 3687 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3688 { 3689 union ibmvnic_crq crq; 3690 3691 memset(&crq, 0, sizeof(crq)); 3692 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3693 crq.version_exchange.cmd = VERSION_EXCHANGE; 3694 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3695 3696 return ibmvnic_send_crq(adapter, &crq); 3697 } 3698 3699 struct vnic_login_client_data { 3700 u8 type; 3701 __be16 len; 3702 char name[]; 3703 } __packed; 3704 3705 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3706 { 3707 int len; 3708 3709 /* Calculate the amount of buffer space needed for the 3710 * vnic client data in the login buffer. There are four entries, 3711 * OS name, LPAR name, device name, and a null last entry. 3712 */ 3713 len = 4 * sizeof(struct vnic_login_client_data); 3714 len += 6; /* "Linux" plus NULL */ 3715 len += strlen(utsname()->nodename) + 1; 3716 len += strlen(adapter->netdev->name) + 1; 3717 3718 return len; 3719 } 3720 3721 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3722 struct vnic_login_client_data *vlcd) 3723 { 3724 const char *os_name = "Linux"; 3725 int len; 3726 3727 /* Type 1 - LPAR OS */ 3728 vlcd->type = 1; 3729 len = strlen(os_name) + 1; 3730 vlcd->len = cpu_to_be16(len); 3731 strncpy(vlcd->name, os_name, len); 3732 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3733 3734 /* Type 2 - LPAR name */ 3735 vlcd->type = 2; 3736 len = strlen(utsname()->nodename) + 1; 3737 vlcd->len = cpu_to_be16(len); 3738 strncpy(vlcd->name, utsname()->nodename, len); 3739 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3740 3741 /* Type 3 - device name */ 3742 vlcd->type = 3; 3743 len = strlen(adapter->netdev->name) + 1; 3744 vlcd->len = cpu_to_be16(len); 3745 strncpy(vlcd->name, adapter->netdev->name, len); 3746 } 3747 3748 static int send_login(struct ibmvnic_adapter *adapter) 3749 { 3750 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3751 struct ibmvnic_login_buffer *login_buffer; 3752 struct device *dev = &adapter->vdev->dev; 3753 struct vnic_login_client_data *vlcd; 3754 dma_addr_t rsp_buffer_token; 3755 dma_addr_t buffer_token; 3756 size_t rsp_buffer_size; 3757 union ibmvnic_crq crq; 3758 int client_data_len; 3759 size_t buffer_size; 3760 __be64 *tx_list_p; 3761 __be64 *rx_list_p; 3762 int rc; 3763 int i; 3764 3765 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3766 netdev_err(adapter->netdev, 3767 "RX or TX queues are not allocated, device login failed\n"); 3768 return -1; 3769 } 3770 3771 release_login_rsp_buffer(adapter); 3772 client_data_len = vnic_client_data_len(adapter); 3773 3774 buffer_size = 3775 sizeof(struct ibmvnic_login_buffer) + 3776 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3777 client_data_len; 3778 3779 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3780 if (!login_buffer) 3781 goto buf_alloc_failed; 3782 3783 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3784 DMA_TO_DEVICE); 3785 if (dma_mapping_error(dev, buffer_token)) { 3786 dev_err(dev, "Couldn't map login buffer\n"); 3787 goto buf_map_failed; 3788 } 3789 3790 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3791 sizeof(u64) * adapter->req_tx_queues + 3792 sizeof(u64) * adapter->req_rx_queues + 3793 sizeof(u64) * adapter->req_rx_queues + 3794 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3795 3796 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3797 if (!login_rsp_buffer) 3798 goto buf_rsp_alloc_failed; 3799 3800 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3801 rsp_buffer_size, DMA_FROM_DEVICE); 3802 if (dma_mapping_error(dev, rsp_buffer_token)) { 3803 dev_err(dev, "Couldn't map login rsp buffer\n"); 3804 goto buf_rsp_map_failed; 3805 } 3806 3807 adapter->login_buf = login_buffer; 3808 adapter->login_buf_token = buffer_token; 3809 adapter->login_buf_sz = buffer_size; 3810 adapter->login_rsp_buf = login_rsp_buffer; 3811 adapter->login_rsp_buf_token = rsp_buffer_token; 3812 adapter->login_rsp_buf_sz = rsp_buffer_size; 3813 3814 login_buffer->len = cpu_to_be32(buffer_size); 3815 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3816 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3817 login_buffer->off_txcomp_subcrqs = 3818 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3819 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3820 login_buffer->off_rxcomp_subcrqs = 3821 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3822 sizeof(u64) * adapter->req_tx_queues); 3823 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3824 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3825 3826 tx_list_p = (__be64 *)((char *)login_buffer + 3827 sizeof(struct ibmvnic_login_buffer)); 3828 rx_list_p = (__be64 *)((char *)login_buffer + 3829 sizeof(struct ibmvnic_login_buffer) + 3830 sizeof(u64) * adapter->req_tx_queues); 3831 3832 for (i = 0; i < adapter->req_tx_queues; i++) { 3833 if (adapter->tx_scrq[i]) { 3834 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3835 crq_num); 3836 } 3837 } 3838 3839 for (i = 0; i < adapter->req_rx_queues; i++) { 3840 if (adapter->rx_scrq[i]) { 3841 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3842 crq_num); 3843 } 3844 } 3845 3846 /* Insert vNIC login client data */ 3847 vlcd = (struct vnic_login_client_data *) 3848 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3849 login_buffer->client_data_offset = 3850 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3851 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3852 3853 vnic_add_client_data(adapter, vlcd); 3854 3855 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3856 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3857 netdev_dbg(adapter->netdev, "%016lx\n", 3858 ((unsigned long int *)(adapter->login_buf))[i]); 3859 } 3860 3861 memset(&crq, 0, sizeof(crq)); 3862 crq.login.first = IBMVNIC_CRQ_CMD; 3863 crq.login.cmd = LOGIN; 3864 crq.login.ioba = cpu_to_be32(buffer_token); 3865 crq.login.len = cpu_to_be32(buffer_size); 3866 3867 adapter->login_pending = true; 3868 rc = ibmvnic_send_crq(adapter, &crq); 3869 if (rc) { 3870 adapter->login_pending = false; 3871 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 3872 goto buf_rsp_map_failed; 3873 } 3874 3875 return 0; 3876 3877 buf_rsp_map_failed: 3878 kfree(login_rsp_buffer); 3879 adapter->login_rsp_buf = NULL; 3880 buf_rsp_alloc_failed: 3881 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3882 buf_map_failed: 3883 kfree(login_buffer); 3884 adapter->login_buf = NULL; 3885 buf_alloc_failed: 3886 return -1; 3887 } 3888 3889 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3890 u32 len, u8 map_id) 3891 { 3892 union ibmvnic_crq crq; 3893 3894 memset(&crq, 0, sizeof(crq)); 3895 crq.request_map.first = IBMVNIC_CRQ_CMD; 3896 crq.request_map.cmd = REQUEST_MAP; 3897 crq.request_map.map_id = map_id; 3898 crq.request_map.ioba = cpu_to_be32(addr); 3899 crq.request_map.len = cpu_to_be32(len); 3900 return ibmvnic_send_crq(adapter, &crq); 3901 } 3902 3903 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3904 { 3905 union ibmvnic_crq crq; 3906 3907 memset(&crq, 0, sizeof(crq)); 3908 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3909 crq.request_unmap.cmd = REQUEST_UNMAP; 3910 crq.request_unmap.map_id = map_id; 3911 return ibmvnic_send_crq(adapter, &crq); 3912 } 3913 3914 static void send_query_map(struct ibmvnic_adapter *adapter) 3915 { 3916 union ibmvnic_crq crq; 3917 3918 memset(&crq, 0, sizeof(crq)); 3919 crq.query_map.first = IBMVNIC_CRQ_CMD; 3920 crq.query_map.cmd = QUERY_MAP; 3921 ibmvnic_send_crq(adapter, &crq); 3922 } 3923 3924 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3925 static void send_query_cap(struct ibmvnic_adapter *adapter) 3926 { 3927 union ibmvnic_crq crq; 3928 3929 atomic_set(&adapter->running_cap_crqs, 0); 3930 memset(&crq, 0, sizeof(crq)); 3931 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3932 crq.query_capability.cmd = QUERY_CAPABILITY; 3933 3934 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3935 atomic_inc(&adapter->running_cap_crqs); 3936 ibmvnic_send_crq(adapter, &crq); 3937 3938 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3939 atomic_inc(&adapter->running_cap_crqs); 3940 ibmvnic_send_crq(adapter, &crq); 3941 3942 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3943 atomic_inc(&adapter->running_cap_crqs); 3944 ibmvnic_send_crq(adapter, &crq); 3945 3946 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3947 atomic_inc(&adapter->running_cap_crqs); 3948 ibmvnic_send_crq(adapter, &crq); 3949 3950 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3951 atomic_inc(&adapter->running_cap_crqs); 3952 ibmvnic_send_crq(adapter, &crq); 3953 3954 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3955 atomic_inc(&adapter->running_cap_crqs); 3956 ibmvnic_send_crq(adapter, &crq); 3957 3958 crq.query_capability.capability = 3959 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3960 atomic_inc(&adapter->running_cap_crqs); 3961 ibmvnic_send_crq(adapter, &crq); 3962 3963 crq.query_capability.capability = 3964 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3965 atomic_inc(&adapter->running_cap_crqs); 3966 ibmvnic_send_crq(adapter, &crq); 3967 3968 crq.query_capability.capability = 3969 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3970 atomic_inc(&adapter->running_cap_crqs); 3971 ibmvnic_send_crq(adapter, &crq); 3972 3973 crq.query_capability.capability = 3974 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3975 atomic_inc(&adapter->running_cap_crqs); 3976 ibmvnic_send_crq(adapter, &crq); 3977 3978 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3979 atomic_inc(&adapter->running_cap_crqs); 3980 ibmvnic_send_crq(adapter, &crq); 3981 3982 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3983 atomic_inc(&adapter->running_cap_crqs); 3984 ibmvnic_send_crq(adapter, &crq); 3985 3986 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3987 atomic_inc(&adapter->running_cap_crqs); 3988 ibmvnic_send_crq(adapter, &crq); 3989 3990 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3991 atomic_inc(&adapter->running_cap_crqs); 3992 ibmvnic_send_crq(adapter, &crq); 3993 3994 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3995 atomic_inc(&adapter->running_cap_crqs); 3996 ibmvnic_send_crq(adapter, &crq); 3997 3998 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3999 atomic_inc(&adapter->running_cap_crqs); 4000 ibmvnic_send_crq(adapter, &crq); 4001 4002 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4003 atomic_inc(&adapter->running_cap_crqs); 4004 ibmvnic_send_crq(adapter, &crq); 4005 4006 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4007 atomic_inc(&adapter->running_cap_crqs); 4008 ibmvnic_send_crq(adapter, &crq); 4009 4010 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4011 atomic_inc(&adapter->running_cap_crqs); 4012 ibmvnic_send_crq(adapter, &crq); 4013 4014 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4015 atomic_inc(&adapter->running_cap_crqs); 4016 ibmvnic_send_crq(adapter, &crq); 4017 4018 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4019 atomic_inc(&adapter->running_cap_crqs); 4020 ibmvnic_send_crq(adapter, &crq); 4021 4022 crq.query_capability.capability = 4023 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4024 atomic_inc(&adapter->running_cap_crqs); 4025 ibmvnic_send_crq(adapter, &crq); 4026 4027 crq.query_capability.capability = 4028 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4029 atomic_inc(&adapter->running_cap_crqs); 4030 ibmvnic_send_crq(adapter, &crq); 4031 4032 crq.query_capability.capability = 4033 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4034 atomic_inc(&adapter->running_cap_crqs); 4035 ibmvnic_send_crq(adapter, &crq); 4036 4037 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4038 atomic_inc(&adapter->running_cap_crqs); 4039 ibmvnic_send_crq(adapter, &crq); 4040 } 4041 4042 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4043 { 4044 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4045 struct device *dev = &adapter->vdev->dev; 4046 union ibmvnic_crq crq; 4047 4048 adapter->ip_offload_tok = 4049 dma_map_single(dev, 4050 &adapter->ip_offload_buf, 4051 buf_sz, 4052 DMA_FROM_DEVICE); 4053 4054 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4055 if (!firmware_has_feature(FW_FEATURE_CMO)) 4056 dev_err(dev, "Couldn't map offload buffer\n"); 4057 return; 4058 } 4059 4060 memset(&crq, 0, sizeof(crq)); 4061 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4062 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4063 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4064 crq.query_ip_offload.ioba = 4065 cpu_to_be32(adapter->ip_offload_tok); 4066 4067 ibmvnic_send_crq(adapter, &crq); 4068 } 4069 4070 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4071 { 4072 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4073 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4074 struct device *dev = &adapter->vdev->dev; 4075 netdev_features_t old_hw_features = 0; 4076 union ibmvnic_crq crq; 4077 4078 adapter->ip_offload_ctrl_tok = 4079 dma_map_single(dev, 4080 ctrl_buf, 4081 sizeof(adapter->ip_offload_ctrl), 4082 DMA_TO_DEVICE); 4083 4084 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4085 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4086 return; 4087 } 4088 4089 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4090 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4091 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4092 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4093 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4094 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4095 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4096 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4097 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4098 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4099 4100 /* large_rx disabled for now, additional features needed */ 4101 ctrl_buf->large_rx_ipv4 = 0; 4102 ctrl_buf->large_rx_ipv6 = 0; 4103 4104 if (adapter->state != VNIC_PROBING) { 4105 old_hw_features = adapter->netdev->hw_features; 4106 adapter->netdev->hw_features = 0; 4107 } 4108 4109 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4110 4111 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4112 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4113 4114 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4115 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4116 4117 if ((adapter->netdev->features & 4118 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4119 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4120 4121 if (buf->large_tx_ipv4) 4122 adapter->netdev->hw_features |= NETIF_F_TSO; 4123 if (buf->large_tx_ipv6) 4124 adapter->netdev->hw_features |= NETIF_F_TSO6; 4125 4126 if (adapter->state == VNIC_PROBING) { 4127 adapter->netdev->features |= adapter->netdev->hw_features; 4128 } else if (old_hw_features != adapter->netdev->hw_features) { 4129 netdev_features_t tmp = 0; 4130 4131 /* disable features no longer supported */ 4132 adapter->netdev->features &= adapter->netdev->hw_features; 4133 /* turn on features now supported if previously enabled */ 4134 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4135 adapter->netdev->hw_features; 4136 adapter->netdev->features |= 4137 tmp & adapter->netdev->wanted_features; 4138 } 4139 4140 memset(&crq, 0, sizeof(crq)); 4141 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4142 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4143 crq.control_ip_offload.len = 4144 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4145 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4146 ibmvnic_send_crq(adapter, &crq); 4147 } 4148 4149 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4150 struct ibmvnic_adapter *adapter) 4151 { 4152 struct device *dev = &adapter->vdev->dev; 4153 4154 if (crq->get_vpd_size_rsp.rc.code) { 4155 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4156 crq->get_vpd_size_rsp.rc.code); 4157 complete(&adapter->fw_done); 4158 return; 4159 } 4160 4161 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4162 complete(&adapter->fw_done); 4163 } 4164 4165 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4166 struct ibmvnic_adapter *adapter) 4167 { 4168 struct device *dev = &adapter->vdev->dev; 4169 unsigned char *substr = NULL; 4170 u8 fw_level_len = 0; 4171 4172 memset(adapter->fw_version, 0, 32); 4173 4174 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4175 DMA_FROM_DEVICE); 4176 4177 if (crq->get_vpd_rsp.rc.code) { 4178 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4179 crq->get_vpd_rsp.rc.code); 4180 goto complete; 4181 } 4182 4183 /* get the position of the firmware version info 4184 * located after the ASCII 'RM' substring in the buffer 4185 */ 4186 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4187 if (!substr) { 4188 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4189 goto complete; 4190 } 4191 4192 /* get length of firmware level ASCII substring */ 4193 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4194 fw_level_len = *(substr + 2); 4195 } else { 4196 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4197 goto complete; 4198 } 4199 4200 /* copy firmware version string from vpd into adapter */ 4201 if ((substr + 3 + fw_level_len) < 4202 (adapter->vpd->buff + adapter->vpd->len)) { 4203 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4204 } else { 4205 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4206 } 4207 4208 complete: 4209 if (adapter->fw_version[0] == '\0') 4210 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4211 complete(&adapter->fw_done); 4212 } 4213 4214 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4215 { 4216 struct device *dev = &adapter->vdev->dev; 4217 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4218 int i; 4219 4220 dma_unmap_single(dev, adapter->ip_offload_tok, 4221 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4222 4223 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4224 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4225 netdev_dbg(adapter->netdev, "%016lx\n", 4226 ((unsigned long int *)(buf))[i]); 4227 4228 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4229 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4230 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4231 buf->tcp_ipv4_chksum); 4232 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4233 buf->tcp_ipv6_chksum); 4234 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4235 buf->udp_ipv4_chksum); 4236 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4237 buf->udp_ipv6_chksum); 4238 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4239 buf->large_tx_ipv4); 4240 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4241 buf->large_tx_ipv6); 4242 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4243 buf->large_rx_ipv4); 4244 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4245 buf->large_rx_ipv6); 4246 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4247 buf->max_ipv4_header_size); 4248 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4249 buf->max_ipv6_header_size); 4250 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4251 buf->max_tcp_header_size); 4252 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4253 buf->max_udp_header_size); 4254 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4255 buf->max_large_tx_size); 4256 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4257 buf->max_large_rx_size); 4258 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4259 buf->ipv6_extension_header); 4260 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4261 buf->tcp_pseudosum_req); 4262 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4263 buf->num_ipv6_ext_headers); 4264 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4265 buf->off_ipv6_ext_headers); 4266 4267 send_control_ip_offload(adapter); 4268 } 4269 4270 static const char *ibmvnic_fw_err_cause(u16 cause) 4271 { 4272 switch (cause) { 4273 case ADAPTER_PROBLEM: 4274 return "adapter problem"; 4275 case BUS_PROBLEM: 4276 return "bus problem"; 4277 case FW_PROBLEM: 4278 return "firmware problem"; 4279 case DD_PROBLEM: 4280 return "device driver problem"; 4281 case EEH_RECOVERY: 4282 return "EEH recovery"; 4283 case FW_UPDATED: 4284 return "firmware updated"; 4285 case LOW_MEMORY: 4286 return "low Memory"; 4287 default: 4288 return "unknown"; 4289 } 4290 } 4291 4292 static void handle_error_indication(union ibmvnic_crq *crq, 4293 struct ibmvnic_adapter *adapter) 4294 { 4295 struct device *dev = &adapter->vdev->dev; 4296 u16 cause; 4297 4298 cause = be16_to_cpu(crq->error_indication.error_cause); 4299 4300 dev_warn_ratelimited(dev, 4301 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4302 crq->error_indication.flags 4303 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4304 ibmvnic_fw_err_cause(cause)); 4305 4306 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4307 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4308 else 4309 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4310 } 4311 4312 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4313 struct ibmvnic_adapter *adapter) 4314 { 4315 struct net_device *netdev = adapter->netdev; 4316 struct device *dev = &adapter->vdev->dev; 4317 long rc; 4318 4319 rc = crq->change_mac_addr_rsp.rc.code; 4320 if (rc) { 4321 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4322 goto out; 4323 } 4324 /* crq->change_mac_addr.mac_addr is the requested one 4325 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4326 */ 4327 ether_addr_copy(netdev->dev_addr, 4328 &crq->change_mac_addr_rsp.mac_addr[0]); 4329 ether_addr_copy(adapter->mac_addr, 4330 &crq->change_mac_addr_rsp.mac_addr[0]); 4331 out: 4332 complete(&adapter->fw_done); 4333 return rc; 4334 } 4335 4336 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4337 struct ibmvnic_adapter *adapter) 4338 { 4339 struct device *dev = &adapter->vdev->dev; 4340 u64 *req_value; 4341 char *name; 4342 4343 atomic_dec(&adapter->running_cap_crqs); 4344 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4345 case REQ_TX_QUEUES: 4346 req_value = &adapter->req_tx_queues; 4347 name = "tx"; 4348 break; 4349 case REQ_RX_QUEUES: 4350 req_value = &adapter->req_rx_queues; 4351 name = "rx"; 4352 break; 4353 case REQ_RX_ADD_QUEUES: 4354 req_value = &adapter->req_rx_add_queues; 4355 name = "rx_add"; 4356 break; 4357 case REQ_TX_ENTRIES_PER_SUBCRQ: 4358 req_value = &adapter->req_tx_entries_per_subcrq; 4359 name = "tx_entries_per_subcrq"; 4360 break; 4361 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4362 req_value = &adapter->req_rx_add_entries_per_subcrq; 4363 name = "rx_add_entries_per_subcrq"; 4364 break; 4365 case REQ_MTU: 4366 req_value = &adapter->req_mtu; 4367 name = "mtu"; 4368 break; 4369 case PROMISC_REQUESTED: 4370 req_value = &adapter->promisc; 4371 name = "promisc"; 4372 break; 4373 default: 4374 dev_err(dev, "Got invalid cap request rsp %d\n", 4375 crq->request_capability.capability); 4376 return; 4377 } 4378 4379 switch (crq->request_capability_rsp.rc.code) { 4380 case SUCCESS: 4381 break; 4382 case PARTIALSUCCESS: 4383 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4384 *req_value, 4385 (long int)be64_to_cpu(crq->request_capability_rsp. 4386 number), name); 4387 4388 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4389 REQ_MTU) { 4390 pr_err("mtu of %llu is not supported. Reverting.\n", 4391 *req_value); 4392 *req_value = adapter->fallback.mtu; 4393 } else { 4394 *req_value = 4395 be64_to_cpu(crq->request_capability_rsp.number); 4396 } 4397 4398 send_request_cap(adapter, 1); 4399 return; 4400 default: 4401 dev_err(dev, "Error %d in request cap rsp\n", 4402 crq->request_capability_rsp.rc.code); 4403 return; 4404 } 4405 4406 /* Done receiving requested capabilities, query IP offload support */ 4407 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4408 adapter->wait_capability = false; 4409 send_query_ip_offload(adapter); 4410 } 4411 } 4412 4413 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4414 struct ibmvnic_adapter *adapter) 4415 { 4416 struct device *dev = &adapter->vdev->dev; 4417 struct net_device *netdev = adapter->netdev; 4418 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4419 struct ibmvnic_login_buffer *login = adapter->login_buf; 4420 u64 *tx_handle_array; 4421 u64 *rx_handle_array; 4422 int num_tx_pools; 4423 int num_rx_pools; 4424 u64 *size_array; 4425 int i; 4426 4427 /* CHECK: Test/set of login_pending does not need to be atomic 4428 * because only ibmvnic_tasklet tests/clears this. 4429 */ 4430 if (!adapter->login_pending) { 4431 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4432 return 0; 4433 } 4434 adapter->login_pending = false; 4435 4436 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4437 DMA_TO_DEVICE); 4438 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4439 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4440 4441 /* If the number of queues requested can't be allocated by the 4442 * server, the login response will return with code 1. We will need 4443 * to resend the login buffer with fewer queues requested. 4444 */ 4445 if (login_rsp_crq->generic.rc.code) { 4446 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4447 complete(&adapter->init_done); 4448 return 0; 4449 } 4450 4451 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4452 4453 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4454 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4455 netdev_dbg(adapter->netdev, "%016lx\n", 4456 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4457 } 4458 4459 /* Sanity checks */ 4460 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4461 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4462 adapter->req_rx_add_queues != 4463 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4464 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4465 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4466 return -EIO; 4467 } 4468 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4469 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4470 /* variable buffer sizes are not supported, so just read the 4471 * first entry. 4472 */ 4473 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4474 4475 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4476 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4477 4478 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4479 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4480 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4481 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4482 4483 for (i = 0; i < num_tx_pools; i++) 4484 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4485 4486 for (i = 0; i < num_rx_pools; i++) 4487 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4488 4489 adapter->num_active_tx_scrqs = num_tx_pools; 4490 adapter->num_active_rx_scrqs = num_rx_pools; 4491 release_login_rsp_buffer(adapter); 4492 release_login_buffer(adapter); 4493 complete(&adapter->init_done); 4494 4495 return 0; 4496 } 4497 4498 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4499 struct ibmvnic_adapter *adapter) 4500 { 4501 struct device *dev = &adapter->vdev->dev; 4502 long rc; 4503 4504 rc = crq->request_unmap_rsp.rc.code; 4505 if (rc) 4506 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4507 } 4508 4509 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4510 struct ibmvnic_adapter *adapter) 4511 { 4512 struct net_device *netdev = adapter->netdev; 4513 struct device *dev = &adapter->vdev->dev; 4514 long rc; 4515 4516 rc = crq->query_map_rsp.rc.code; 4517 if (rc) { 4518 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4519 return; 4520 } 4521 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4522 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4523 crq->query_map_rsp.free_pages); 4524 } 4525 4526 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4527 struct ibmvnic_adapter *adapter) 4528 { 4529 struct net_device *netdev = adapter->netdev; 4530 struct device *dev = &adapter->vdev->dev; 4531 long rc; 4532 4533 atomic_dec(&adapter->running_cap_crqs); 4534 netdev_dbg(netdev, "Outstanding queries: %d\n", 4535 atomic_read(&adapter->running_cap_crqs)); 4536 rc = crq->query_capability.rc.code; 4537 if (rc) { 4538 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4539 goto out; 4540 } 4541 4542 switch (be16_to_cpu(crq->query_capability.capability)) { 4543 case MIN_TX_QUEUES: 4544 adapter->min_tx_queues = 4545 be64_to_cpu(crq->query_capability.number); 4546 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4547 adapter->min_tx_queues); 4548 break; 4549 case MIN_RX_QUEUES: 4550 adapter->min_rx_queues = 4551 be64_to_cpu(crq->query_capability.number); 4552 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4553 adapter->min_rx_queues); 4554 break; 4555 case MIN_RX_ADD_QUEUES: 4556 adapter->min_rx_add_queues = 4557 be64_to_cpu(crq->query_capability.number); 4558 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4559 adapter->min_rx_add_queues); 4560 break; 4561 case MAX_TX_QUEUES: 4562 adapter->max_tx_queues = 4563 be64_to_cpu(crq->query_capability.number); 4564 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4565 adapter->max_tx_queues); 4566 break; 4567 case MAX_RX_QUEUES: 4568 adapter->max_rx_queues = 4569 be64_to_cpu(crq->query_capability.number); 4570 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4571 adapter->max_rx_queues); 4572 break; 4573 case MAX_RX_ADD_QUEUES: 4574 adapter->max_rx_add_queues = 4575 be64_to_cpu(crq->query_capability.number); 4576 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4577 adapter->max_rx_add_queues); 4578 break; 4579 case MIN_TX_ENTRIES_PER_SUBCRQ: 4580 adapter->min_tx_entries_per_subcrq = 4581 be64_to_cpu(crq->query_capability.number); 4582 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4583 adapter->min_tx_entries_per_subcrq); 4584 break; 4585 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4586 adapter->min_rx_add_entries_per_subcrq = 4587 be64_to_cpu(crq->query_capability.number); 4588 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4589 adapter->min_rx_add_entries_per_subcrq); 4590 break; 4591 case MAX_TX_ENTRIES_PER_SUBCRQ: 4592 adapter->max_tx_entries_per_subcrq = 4593 be64_to_cpu(crq->query_capability.number); 4594 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4595 adapter->max_tx_entries_per_subcrq); 4596 break; 4597 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4598 adapter->max_rx_add_entries_per_subcrq = 4599 be64_to_cpu(crq->query_capability.number); 4600 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4601 adapter->max_rx_add_entries_per_subcrq); 4602 break; 4603 case TCP_IP_OFFLOAD: 4604 adapter->tcp_ip_offload = 4605 be64_to_cpu(crq->query_capability.number); 4606 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4607 adapter->tcp_ip_offload); 4608 break; 4609 case PROMISC_SUPPORTED: 4610 adapter->promisc_supported = 4611 be64_to_cpu(crq->query_capability.number); 4612 netdev_dbg(netdev, "promisc_supported = %lld\n", 4613 adapter->promisc_supported); 4614 break; 4615 case MIN_MTU: 4616 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4617 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4618 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4619 break; 4620 case MAX_MTU: 4621 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4622 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4623 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4624 break; 4625 case MAX_MULTICAST_FILTERS: 4626 adapter->max_multicast_filters = 4627 be64_to_cpu(crq->query_capability.number); 4628 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4629 adapter->max_multicast_filters); 4630 break; 4631 case VLAN_HEADER_INSERTION: 4632 adapter->vlan_header_insertion = 4633 be64_to_cpu(crq->query_capability.number); 4634 if (adapter->vlan_header_insertion) 4635 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4636 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4637 adapter->vlan_header_insertion); 4638 break; 4639 case RX_VLAN_HEADER_INSERTION: 4640 adapter->rx_vlan_header_insertion = 4641 be64_to_cpu(crq->query_capability.number); 4642 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4643 adapter->rx_vlan_header_insertion); 4644 break; 4645 case MAX_TX_SG_ENTRIES: 4646 adapter->max_tx_sg_entries = 4647 be64_to_cpu(crq->query_capability.number); 4648 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4649 adapter->max_tx_sg_entries); 4650 break; 4651 case RX_SG_SUPPORTED: 4652 adapter->rx_sg_supported = 4653 be64_to_cpu(crq->query_capability.number); 4654 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4655 adapter->rx_sg_supported); 4656 break; 4657 case OPT_TX_COMP_SUB_QUEUES: 4658 adapter->opt_tx_comp_sub_queues = 4659 be64_to_cpu(crq->query_capability.number); 4660 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4661 adapter->opt_tx_comp_sub_queues); 4662 break; 4663 case OPT_RX_COMP_QUEUES: 4664 adapter->opt_rx_comp_queues = 4665 be64_to_cpu(crq->query_capability.number); 4666 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4667 adapter->opt_rx_comp_queues); 4668 break; 4669 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4670 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4671 be64_to_cpu(crq->query_capability.number); 4672 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4673 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4674 break; 4675 case OPT_TX_ENTRIES_PER_SUBCRQ: 4676 adapter->opt_tx_entries_per_subcrq = 4677 be64_to_cpu(crq->query_capability.number); 4678 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4679 adapter->opt_tx_entries_per_subcrq); 4680 break; 4681 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4682 adapter->opt_rxba_entries_per_subcrq = 4683 be64_to_cpu(crq->query_capability.number); 4684 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4685 adapter->opt_rxba_entries_per_subcrq); 4686 break; 4687 case TX_RX_DESC_REQ: 4688 adapter->tx_rx_desc_req = crq->query_capability.number; 4689 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4690 adapter->tx_rx_desc_req); 4691 break; 4692 4693 default: 4694 netdev_err(netdev, "Got invalid cap rsp %d\n", 4695 crq->query_capability.capability); 4696 } 4697 4698 out: 4699 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4700 adapter->wait_capability = false; 4701 send_request_cap(adapter, 0); 4702 } 4703 } 4704 4705 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4706 { 4707 union ibmvnic_crq crq; 4708 int rc; 4709 4710 memset(&crq, 0, sizeof(crq)); 4711 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4712 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4713 4714 mutex_lock(&adapter->fw_lock); 4715 adapter->fw_done_rc = 0; 4716 reinit_completion(&adapter->fw_done); 4717 4718 rc = ibmvnic_send_crq(adapter, &crq); 4719 if (rc) { 4720 mutex_unlock(&adapter->fw_lock); 4721 return rc; 4722 } 4723 4724 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4725 if (rc) { 4726 mutex_unlock(&adapter->fw_lock); 4727 return rc; 4728 } 4729 4730 mutex_unlock(&adapter->fw_lock); 4731 return adapter->fw_done_rc ? -EIO : 0; 4732 } 4733 4734 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4735 struct ibmvnic_adapter *adapter) 4736 { 4737 struct net_device *netdev = adapter->netdev; 4738 int rc; 4739 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4740 4741 rc = crq->query_phys_parms_rsp.rc.code; 4742 if (rc) { 4743 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4744 return rc; 4745 } 4746 switch (rspeed) { 4747 case IBMVNIC_10MBPS: 4748 adapter->speed = SPEED_10; 4749 break; 4750 case IBMVNIC_100MBPS: 4751 adapter->speed = SPEED_100; 4752 break; 4753 case IBMVNIC_1GBPS: 4754 adapter->speed = SPEED_1000; 4755 break; 4756 case IBMVNIC_10GBPS: 4757 adapter->speed = SPEED_10000; 4758 break; 4759 case IBMVNIC_25GBPS: 4760 adapter->speed = SPEED_25000; 4761 break; 4762 case IBMVNIC_40GBPS: 4763 adapter->speed = SPEED_40000; 4764 break; 4765 case IBMVNIC_50GBPS: 4766 adapter->speed = SPEED_50000; 4767 break; 4768 case IBMVNIC_100GBPS: 4769 adapter->speed = SPEED_100000; 4770 break; 4771 case IBMVNIC_200GBPS: 4772 adapter->speed = SPEED_200000; 4773 break; 4774 default: 4775 if (netif_carrier_ok(netdev)) 4776 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4777 adapter->speed = SPEED_UNKNOWN; 4778 } 4779 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4780 adapter->duplex = DUPLEX_FULL; 4781 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4782 adapter->duplex = DUPLEX_HALF; 4783 else 4784 adapter->duplex = DUPLEX_UNKNOWN; 4785 4786 return rc; 4787 } 4788 4789 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4790 struct ibmvnic_adapter *adapter) 4791 { 4792 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4793 struct net_device *netdev = adapter->netdev; 4794 struct device *dev = &adapter->vdev->dev; 4795 u64 *u64_crq = (u64 *)crq; 4796 long rc; 4797 4798 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4799 (unsigned long int)cpu_to_be64(u64_crq[0]), 4800 (unsigned long int)cpu_to_be64(u64_crq[1])); 4801 switch (gen_crq->first) { 4802 case IBMVNIC_CRQ_INIT_RSP: 4803 switch (gen_crq->cmd) { 4804 case IBMVNIC_CRQ_INIT: 4805 dev_info(dev, "Partner initialized\n"); 4806 adapter->from_passive_init = true; 4807 /* Discard any stale login responses from prev reset. 4808 * CHECK: should we clear even on INIT_COMPLETE? 4809 */ 4810 adapter->login_pending = false; 4811 4812 if (!completion_done(&adapter->init_done)) { 4813 complete(&adapter->init_done); 4814 adapter->init_done_rc = -EIO; 4815 } 4816 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4817 break; 4818 case IBMVNIC_CRQ_INIT_COMPLETE: 4819 dev_info(dev, "Partner initialization complete\n"); 4820 adapter->crq.active = true; 4821 send_version_xchg(adapter); 4822 break; 4823 default: 4824 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4825 } 4826 return; 4827 case IBMVNIC_CRQ_XPORT_EVENT: 4828 netif_carrier_off(netdev); 4829 adapter->crq.active = false; 4830 /* terminate any thread waiting for a response 4831 * from the device 4832 */ 4833 if (!completion_done(&adapter->fw_done)) { 4834 adapter->fw_done_rc = -EIO; 4835 complete(&adapter->fw_done); 4836 } 4837 if (!completion_done(&adapter->stats_done)) 4838 complete(&adapter->stats_done); 4839 if (test_bit(0, &adapter->resetting)) 4840 adapter->force_reset_recovery = true; 4841 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4842 dev_info(dev, "Migrated, re-enabling adapter\n"); 4843 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4844 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4845 dev_info(dev, "Backing device failover detected\n"); 4846 adapter->failover_pending = true; 4847 } else { 4848 /* The adapter lost the connection */ 4849 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4850 gen_crq->cmd); 4851 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4852 } 4853 return; 4854 case IBMVNIC_CRQ_CMD_RSP: 4855 break; 4856 default: 4857 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4858 gen_crq->first); 4859 return; 4860 } 4861 4862 switch (gen_crq->cmd) { 4863 case VERSION_EXCHANGE_RSP: 4864 rc = crq->version_exchange_rsp.rc.code; 4865 if (rc) { 4866 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4867 break; 4868 } 4869 ibmvnic_version = 4870 be16_to_cpu(crq->version_exchange_rsp.version); 4871 dev_info(dev, "Partner protocol version is %d\n", 4872 ibmvnic_version); 4873 send_query_cap(adapter); 4874 break; 4875 case QUERY_CAPABILITY_RSP: 4876 handle_query_cap_rsp(crq, adapter); 4877 break; 4878 case QUERY_MAP_RSP: 4879 handle_query_map_rsp(crq, adapter); 4880 break; 4881 case REQUEST_MAP_RSP: 4882 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4883 complete(&adapter->fw_done); 4884 break; 4885 case REQUEST_UNMAP_RSP: 4886 handle_request_unmap_rsp(crq, adapter); 4887 break; 4888 case REQUEST_CAPABILITY_RSP: 4889 handle_request_cap_rsp(crq, adapter); 4890 break; 4891 case LOGIN_RSP: 4892 netdev_dbg(netdev, "Got Login Response\n"); 4893 handle_login_rsp(crq, adapter); 4894 break; 4895 case LOGICAL_LINK_STATE_RSP: 4896 netdev_dbg(netdev, 4897 "Got Logical Link State Response, state: %d rc: %d\n", 4898 crq->logical_link_state_rsp.link_state, 4899 crq->logical_link_state_rsp.rc.code); 4900 adapter->logical_link_state = 4901 crq->logical_link_state_rsp.link_state; 4902 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4903 complete(&adapter->init_done); 4904 break; 4905 case LINK_STATE_INDICATION: 4906 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4907 adapter->phys_link_state = 4908 crq->link_state_indication.phys_link_state; 4909 adapter->logical_link_state = 4910 crq->link_state_indication.logical_link_state; 4911 if (adapter->phys_link_state && adapter->logical_link_state) 4912 netif_carrier_on(netdev); 4913 else 4914 netif_carrier_off(netdev); 4915 break; 4916 case CHANGE_MAC_ADDR_RSP: 4917 netdev_dbg(netdev, "Got MAC address change Response\n"); 4918 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4919 break; 4920 case ERROR_INDICATION: 4921 netdev_dbg(netdev, "Got Error Indication\n"); 4922 handle_error_indication(crq, adapter); 4923 break; 4924 case REQUEST_STATISTICS_RSP: 4925 netdev_dbg(netdev, "Got Statistics Response\n"); 4926 complete(&adapter->stats_done); 4927 break; 4928 case QUERY_IP_OFFLOAD_RSP: 4929 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4930 handle_query_ip_offload_rsp(adapter); 4931 break; 4932 case MULTICAST_CTRL_RSP: 4933 netdev_dbg(netdev, "Got multicast control Response\n"); 4934 break; 4935 case CONTROL_IP_OFFLOAD_RSP: 4936 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4937 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4938 sizeof(adapter->ip_offload_ctrl), 4939 DMA_TO_DEVICE); 4940 complete(&adapter->init_done); 4941 break; 4942 case COLLECT_FW_TRACE_RSP: 4943 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4944 complete(&adapter->fw_done); 4945 break; 4946 case GET_VPD_SIZE_RSP: 4947 handle_vpd_size_rsp(crq, adapter); 4948 break; 4949 case GET_VPD_RSP: 4950 handle_vpd_rsp(crq, adapter); 4951 break; 4952 case QUERY_PHYS_PARMS_RSP: 4953 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4954 complete(&adapter->fw_done); 4955 break; 4956 default: 4957 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4958 gen_crq->cmd); 4959 } 4960 } 4961 4962 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4963 { 4964 struct ibmvnic_adapter *adapter = instance; 4965 4966 tasklet_schedule(&adapter->tasklet); 4967 return IRQ_HANDLED; 4968 } 4969 4970 static void ibmvnic_tasklet(struct tasklet_struct *t) 4971 { 4972 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 4973 struct ibmvnic_crq_queue *queue = &adapter->crq; 4974 union ibmvnic_crq *crq; 4975 unsigned long flags; 4976 bool done = false; 4977 4978 spin_lock_irqsave(&queue->lock, flags); 4979 while (!done) { 4980 /* Pull all the valid messages off the CRQ */ 4981 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4982 ibmvnic_handle_crq(crq, adapter); 4983 crq->generic.first = 0; 4984 } 4985 4986 /* remain in tasklet until all 4987 * capabilities responses are received 4988 */ 4989 if (!adapter->wait_capability) 4990 done = true; 4991 } 4992 /* if capabilities CRQ's were sent in this tasklet, the following 4993 * tasklet must wait until all responses are received 4994 */ 4995 if (atomic_read(&adapter->running_cap_crqs) != 0) 4996 adapter->wait_capability = true; 4997 spin_unlock_irqrestore(&queue->lock, flags); 4998 } 4999 5000 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5001 { 5002 struct vio_dev *vdev = adapter->vdev; 5003 int rc; 5004 5005 do { 5006 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5007 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5008 5009 if (rc) 5010 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5011 5012 return rc; 5013 } 5014 5015 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5016 { 5017 struct ibmvnic_crq_queue *crq = &adapter->crq; 5018 struct device *dev = &adapter->vdev->dev; 5019 struct vio_dev *vdev = adapter->vdev; 5020 int rc; 5021 5022 /* Close the CRQ */ 5023 do { 5024 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5025 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5026 5027 /* Clean out the queue */ 5028 if (!crq->msgs) 5029 return -EINVAL; 5030 5031 memset(crq->msgs, 0, PAGE_SIZE); 5032 crq->cur = 0; 5033 crq->active = false; 5034 5035 /* And re-open it again */ 5036 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5037 crq->msg_token, PAGE_SIZE); 5038 5039 if (rc == H_CLOSED) 5040 /* Adapter is good, but other end is not ready */ 5041 dev_warn(dev, "Partner adapter not ready\n"); 5042 else if (rc != 0) 5043 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5044 5045 return rc; 5046 } 5047 5048 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5049 { 5050 struct ibmvnic_crq_queue *crq = &adapter->crq; 5051 struct vio_dev *vdev = adapter->vdev; 5052 long rc; 5053 5054 if (!crq->msgs) 5055 return; 5056 5057 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5058 free_irq(vdev->irq, adapter); 5059 tasklet_kill(&adapter->tasklet); 5060 do { 5061 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5062 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5063 5064 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5065 DMA_BIDIRECTIONAL); 5066 free_page((unsigned long)crq->msgs); 5067 crq->msgs = NULL; 5068 crq->active = false; 5069 } 5070 5071 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5072 { 5073 struct ibmvnic_crq_queue *crq = &adapter->crq; 5074 struct device *dev = &adapter->vdev->dev; 5075 struct vio_dev *vdev = adapter->vdev; 5076 int rc, retrc = -ENOMEM; 5077 5078 if (crq->msgs) 5079 return 0; 5080 5081 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5082 /* Should we allocate more than one page? */ 5083 5084 if (!crq->msgs) 5085 return -ENOMEM; 5086 5087 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5088 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5089 DMA_BIDIRECTIONAL); 5090 if (dma_mapping_error(dev, crq->msg_token)) 5091 goto map_failed; 5092 5093 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5094 crq->msg_token, PAGE_SIZE); 5095 5096 if (rc == H_RESOURCE) 5097 /* maybe kexecing and resource is busy. try a reset */ 5098 rc = ibmvnic_reset_crq(adapter); 5099 retrc = rc; 5100 5101 if (rc == H_CLOSED) { 5102 dev_warn(dev, "Partner adapter not ready\n"); 5103 } else if (rc) { 5104 dev_warn(dev, "Error %d opening adapter\n", rc); 5105 goto reg_crq_failed; 5106 } 5107 5108 retrc = 0; 5109 5110 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5111 5112 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5113 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5114 adapter->vdev->unit_address); 5115 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5116 if (rc) { 5117 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5118 vdev->irq, rc); 5119 goto req_irq_failed; 5120 } 5121 5122 rc = vio_enable_interrupts(vdev); 5123 if (rc) { 5124 dev_err(dev, "Error %d enabling interrupts\n", rc); 5125 goto req_irq_failed; 5126 } 5127 5128 crq->cur = 0; 5129 spin_lock_init(&crq->lock); 5130 5131 return retrc; 5132 5133 req_irq_failed: 5134 tasklet_kill(&adapter->tasklet); 5135 do { 5136 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5137 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5138 reg_crq_failed: 5139 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5140 map_failed: 5141 free_page((unsigned long)crq->msgs); 5142 crq->msgs = NULL; 5143 return retrc; 5144 } 5145 5146 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5147 { 5148 struct device *dev = &adapter->vdev->dev; 5149 unsigned long timeout = msecs_to_jiffies(20000); 5150 u64 old_num_rx_queues, old_num_tx_queues; 5151 int rc; 5152 5153 adapter->from_passive_init = false; 5154 5155 if (reset) { 5156 old_num_rx_queues = adapter->req_rx_queues; 5157 old_num_tx_queues = adapter->req_tx_queues; 5158 reinit_completion(&adapter->init_done); 5159 } 5160 5161 adapter->init_done_rc = 0; 5162 rc = ibmvnic_send_crq_init(adapter); 5163 if (rc) { 5164 dev_err(dev, "Send crq init failed with error %d\n", rc); 5165 return rc; 5166 } 5167 5168 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5169 dev_err(dev, "Initialization sequence timed out\n"); 5170 return -1; 5171 } 5172 5173 if (adapter->init_done_rc) { 5174 release_crq_queue(adapter); 5175 return adapter->init_done_rc; 5176 } 5177 5178 if (adapter->from_passive_init) { 5179 adapter->state = VNIC_OPEN; 5180 adapter->from_passive_init = false; 5181 return -1; 5182 } 5183 5184 if (reset && 5185 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5186 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5187 if (adapter->req_rx_queues != old_num_rx_queues || 5188 adapter->req_tx_queues != old_num_tx_queues) { 5189 release_sub_crqs(adapter, 0); 5190 rc = init_sub_crqs(adapter); 5191 } else { 5192 rc = reset_sub_crq_queues(adapter); 5193 } 5194 } else { 5195 rc = init_sub_crqs(adapter); 5196 } 5197 5198 if (rc) { 5199 dev_err(dev, "Initialization of sub crqs failed\n"); 5200 release_crq_queue(adapter); 5201 return rc; 5202 } 5203 5204 rc = init_sub_crq_irqs(adapter); 5205 if (rc) { 5206 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5207 release_crq_queue(adapter); 5208 } 5209 5210 return rc; 5211 } 5212 5213 static struct device_attribute dev_attr_failover; 5214 5215 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5216 { 5217 struct ibmvnic_adapter *adapter; 5218 struct net_device *netdev; 5219 unsigned char *mac_addr_p; 5220 int rc; 5221 5222 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5223 dev->unit_address); 5224 5225 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5226 VETH_MAC_ADDR, NULL); 5227 if (!mac_addr_p) { 5228 dev_err(&dev->dev, 5229 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5230 __FILE__, __LINE__); 5231 return 0; 5232 } 5233 5234 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5235 IBMVNIC_MAX_QUEUES); 5236 if (!netdev) 5237 return -ENOMEM; 5238 5239 adapter = netdev_priv(netdev); 5240 adapter->state = VNIC_PROBING; 5241 dev_set_drvdata(&dev->dev, netdev); 5242 adapter->vdev = dev; 5243 adapter->netdev = netdev; 5244 adapter->login_pending = false; 5245 5246 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5247 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5248 netdev->irq = dev->irq; 5249 netdev->netdev_ops = &ibmvnic_netdev_ops; 5250 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5251 SET_NETDEV_DEV(netdev, &dev->dev); 5252 5253 spin_lock_init(&adapter->stats_lock); 5254 5255 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5256 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5257 __ibmvnic_delayed_reset); 5258 INIT_LIST_HEAD(&adapter->rwi_list); 5259 spin_lock_init(&adapter->rwi_lock); 5260 spin_lock_init(&adapter->state_lock); 5261 mutex_init(&adapter->fw_lock); 5262 init_completion(&adapter->init_done); 5263 init_completion(&adapter->fw_done); 5264 init_completion(&adapter->reset_done); 5265 init_completion(&adapter->stats_done); 5266 clear_bit(0, &adapter->resetting); 5267 5268 do { 5269 rc = init_crq_queue(adapter); 5270 if (rc) { 5271 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5272 rc); 5273 goto ibmvnic_init_fail; 5274 } 5275 5276 rc = ibmvnic_reset_init(adapter, false); 5277 if (rc && rc != EAGAIN) 5278 goto ibmvnic_init_fail; 5279 } while (rc == EAGAIN); 5280 5281 rc = init_stats_buffers(adapter); 5282 if (rc) 5283 goto ibmvnic_init_fail; 5284 5285 rc = init_stats_token(adapter); 5286 if (rc) 5287 goto ibmvnic_stats_fail; 5288 5289 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5290 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5291 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5292 5293 rc = device_create_file(&dev->dev, &dev_attr_failover); 5294 if (rc) 5295 goto ibmvnic_dev_file_err; 5296 5297 netif_carrier_off(netdev); 5298 rc = register_netdev(netdev); 5299 if (rc) { 5300 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5301 goto ibmvnic_register_fail; 5302 } 5303 dev_info(&dev->dev, "ibmvnic registered\n"); 5304 5305 adapter->state = VNIC_PROBED; 5306 5307 adapter->wait_for_reset = false; 5308 adapter->last_reset_time = jiffies; 5309 return 0; 5310 5311 ibmvnic_register_fail: 5312 device_remove_file(&dev->dev, &dev_attr_failover); 5313 5314 ibmvnic_dev_file_err: 5315 release_stats_token(adapter); 5316 5317 ibmvnic_stats_fail: 5318 release_stats_buffers(adapter); 5319 5320 ibmvnic_init_fail: 5321 release_sub_crqs(adapter, 1); 5322 release_crq_queue(adapter); 5323 mutex_destroy(&adapter->fw_lock); 5324 free_netdev(netdev); 5325 5326 return rc; 5327 } 5328 5329 static int ibmvnic_remove(struct vio_dev *dev) 5330 { 5331 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5332 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5333 unsigned long flags; 5334 5335 spin_lock_irqsave(&adapter->state_lock, flags); 5336 if (test_bit(0, &adapter->resetting)) { 5337 spin_unlock_irqrestore(&adapter->state_lock, flags); 5338 return -EBUSY; 5339 } 5340 5341 adapter->state = VNIC_REMOVING; 5342 spin_unlock_irqrestore(&adapter->state_lock, flags); 5343 5344 flush_work(&adapter->ibmvnic_reset); 5345 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5346 5347 rtnl_lock(); 5348 unregister_netdevice(netdev); 5349 5350 release_resources(adapter); 5351 release_sub_crqs(adapter, 1); 5352 release_crq_queue(adapter); 5353 5354 release_stats_token(adapter); 5355 release_stats_buffers(adapter); 5356 5357 adapter->state = VNIC_REMOVED; 5358 5359 rtnl_unlock(); 5360 mutex_destroy(&adapter->fw_lock); 5361 device_remove_file(&dev->dev, &dev_attr_failover); 5362 free_netdev(netdev); 5363 dev_set_drvdata(&dev->dev, NULL); 5364 5365 return 0; 5366 } 5367 5368 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5369 const char *buf, size_t count) 5370 { 5371 struct net_device *netdev = dev_get_drvdata(dev); 5372 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5373 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5374 __be64 session_token; 5375 long rc; 5376 5377 if (!sysfs_streq(buf, "1")) 5378 return -EINVAL; 5379 5380 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5381 H_GET_SESSION_TOKEN, 0, 0, 0); 5382 if (rc) { 5383 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5384 rc); 5385 return -EINVAL; 5386 } 5387 5388 session_token = (__be64)retbuf[0]; 5389 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5390 be64_to_cpu(session_token)); 5391 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5392 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5393 if (rc) { 5394 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5395 rc); 5396 return -EINVAL; 5397 } 5398 5399 return count; 5400 } 5401 5402 static DEVICE_ATTR_WO(failover); 5403 5404 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5405 { 5406 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5407 struct ibmvnic_adapter *adapter; 5408 struct iommu_table *tbl; 5409 unsigned long ret = 0; 5410 int i; 5411 5412 tbl = get_iommu_table_base(&vdev->dev); 5413 5414 /* netdev inits at probe time along with the structures we need below*/ 5415 if (!netdev) 5416 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5417 5418 adapter = netdev_priv(netdev); 5419 5420 ret += PAGE_SIZE; /* the crq message queue */ 5421 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5422 5423 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5424 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5425 5426 for (i = 0; i < adapter->num_active_rx_pools; i++) 5427 ret += adapter->rx_pool[i].size * 5428 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5429 5430 return ret; 5431 } 5432 5433 static int ibmvnic_resume(struct device *dev) 5434 { 5435 struct net_device *netdev = dev_get_drvdata(dev); 5436 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5437 5438 if (adapter->state != VNIC_OPEN) 5439 return 0; 5440 5441 tasklet_schedule(&adapter->tasklet); 5442 5443 return 0; 5444 } 5445 5446 static const struct vio_device_id ibmvnic_device_table[] = { 5447 {"network", "IBM,vnic"}, 5448 {"", "" } 5449 }; 5450 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5451 5452 static const struct dev_pm_ops ibmvnic_pm_ops = { 5453 .resume = ibmvnic_resume 5454 }; 5455 5456 static struct vio_driver ibmvnic_driver = { 5457 .id_table = ibmvnic_device_table, 5458 .probe = ibmvnic_probe, 5459 .remove = ibmvnic_remove, 5460 .get_desired_dma = ibmvnic_get_desired_dma, 5461 .name = ibmvnic_driver_name, 5462 .pm = &ibmvnic_pm_ops, 5463 }; 5464 5465 /* module functions */ 5466 static int __init ibmvnic_module_init(void) 5467 { 5468 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5469 IBMVNIC_DRIVER_VERSION); 5470 5471 return vio_register_driver(&ibmvnic_driver); 5472 } 5473 5474 static void __exit ibmvnic_module_exit(void) 5475 { 5476 vio_unregister_driver(&ibmvnic_driver); 5477 } 5478 5479 module_init(ibmvnic_module_init); 5480 module_exit(ibmvnic_module_exit); 5481