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 void release_sub_crqs(struct ibmvnic_adapter *, bool); 82 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 83 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 84 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 85 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 86 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 87 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 88 static int enable_scrq_irq(struct ibmvnic_adapter *, 89 struct ibmvnic_sub_crq_queue *); 90 static int disable_scrq_irq(struct ibmvnic_adapter *, 91 struct ibmvnic_sub_crq_queue *); 92 static int pending_scrq(struct ibmvnic_adapter *, 93 struct ibmvnic_sub_crq_queue *); 94 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 95 struct ibmvnic_sub_crq_queue *); 96 static int ibmvnic_poll(struct napi_struct *napi, int data); 97 static void send_query_map(struct ibmvnic_adapter *adapter); 98 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 99 static int send_request_unmap(struct ibmvnic_adapter *, u8); 100 static int send_login(struct ibmvnic_adapter *adapter); 101 static void send_query_cap(struct ibmvnic_adapter *adapter); 102 static int init_sub_crqs(struct ibmvnic_adapter *); 103 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 104 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 105 static void release_crq_queue(struct ibmvnic_adapter *); 106 static int __ibmvnic_set_mac(struct net_device *, u8 *); 107 static int init_crq_queue(struct ibmvnic_adapter *adapter); 108 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 109 110 struct ibmvnic_stat { 111 char name[ETH_GSTRING_LEN]; 112 int offset; 113 }; 114 115 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 116 offsetof(struct ibmvnic_statistics, stat)) 117 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 118 119 static const struct ibmvnic_stat ibmvnic_stats[] = { 120 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 121 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 122 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 123 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 124 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 125 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 126 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 127 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 128 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 129 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 130 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 131 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 132 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 133 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 134 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 135 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 136 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 137 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 138 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 139 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 140 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 141 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 142 }; 143 144 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 145 unsigned long length, unsigned long *number, 146 unsigned long *irq) 147 { 148 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 149 long rc; 150 151 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 152 *number = retbuf[0]; 153 *irq = retbuf[1]; 154 155 return rc; 156 } 157 158 /** 159 * ibmvnic_wait_for_completion - Check device state and wait for completion 160 * @adapter: private device data 161 * @comp_done: completion structure to wait for 162 * @timeout: time to wait in milliseconds 163 * 164 * Wait for a completion signal or until the timeout limit is reached 165 * while checking that the device is still active. 166 */ 167 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 168 struct completion *comp_done, 169 unsigned long timeout) 170 { 171 struct net_device *netdev; 172 unsigned long div_timeout; 173 u8 retry; 174 175 netdev = adapter->netdev; 176 retry = 5; 177 div_timeout = msecs_to_jiffies(timeout / retry); 178 while (true) { 179 if (!adapter->crq.active) { 180 netdev_err(netdev, "Device down!\n"); 181 return -ENODEV; 182 } 183 if (!retry--) 184 break; 185 if (wait_for_completion_timeout(comp_done, div_timeout)) 186 return 0; 187 } 188 netdev_err(netdev, "Operation timed out.\n"); 189 return -ETIMEDOUT; 190 } 191 192 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 193 struct ibmvnic_long_term_buff *ltb, int size) 194 { 195 struct device *dev = &adapter->vdev->dev; 196 int rc; 197 198 ltb->size = size; 199 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 200 GFP_KERNEL); 201 202 if (!ltb->buff) { 203 dev_err(dev, "Couldn't alloc long term buffer\n"); 204 return -ENOMEM; 205 } 206 ltb->map_id = adapter->map_id; 207 adapter->map_id++; 208 209 mutex_lock(&adapter->fw_lock); 210 adapter->fw_done_rc = 0; 211 reinit_completion(&adapter->fw_done); 212 rc = send_request_map(adapter, ltb->addr, 213 ltb->size, ltb->map_id); 214 if (rc) { 215 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 216 mutex_unlock(&adapter->fw_lock); 217 return rc; 218 } 219 220 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 221 if (rc) { 222 dev_err(dev, 223 "Long term map request aborted or timed out,rc = %d\n", 224 rc); 225 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 226 mutex_unlock(&adapter->fw_lock); 227 return rc; 228 } 229 230 if (adapter->fw_done_rc) { 231 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 232 adapter->fw_done_rc); 233 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 234 mutex_unlock(&adapter->fw_lock); 235 return -1; 236 } 237 mutex_unlock(&adapter->fw_lock); 238 return 0; 239 } 240 241 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 242 struct ibmvnic_long_term_buff *ltb) 243 { 244 struct device *dev = &adapter->vdev->dev; 245 246 if (!ltb->buff) 247 return; 248 249 /* VIOS automatically unmaps the long term buffer at remote 250 * end for the following resets: 251 * FAILOVER, MOBILITY, TIMEOUT. 252 */ 253 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 254 adapter->reset_reason != VNIC_RESET_MOBILITY && 255 adapter->reset_reason != VNIC_RESET_TIMEOUT) 256 send_request_unmap(adapter, ltb->map_id); 257 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 258 } 259 260 static int reset_long_term_buff(struct ibmvnic_long_term_buff *ltb) 261 { 262 if (!ltb->buff) 263 return -EINVAL; 264 265 memset(ltb->buff, 0, ltb->size); 266 return 0; 267 } 268 269 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 270 { 271 int i; 272 273 for (i = 0; i < adapter->num_active_rx_pools; i++) 274 adapter->rx_pool[i].active = 0; 275 } 276 277 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 278 struct ibmvnic_rx_pool *pool) 279 { 280 int count = pool->size - atomic_read(&pool->available); 281 u64 handle = adapter->rx_scrq[pool->index]->handle; 282 struct device *dev = &adapter->vdev->dev; 283 struct ibmvnic_ind_xmit_queue *ind_bufp; 284 struct ibmvnic_sub_crq_queue *rx_scrq; 285 union sub_crq *sub_crq; 286 int buffers_added = 0; 287 unsigned long lpar_rc; 288 struct sk_buff *skb; 289 unsigned int offset; 290 dma_addr_t dma_addr; 291 unsigned char *dst; 292 int shift = 0; 293 int index; 294 int i; 295 296 if (!pool->active) 297 return; 298 299 rx_scrq = adapter->rx_scrq[pool->index]; 300 ind_bufp = &rx_scrq->ind_buf; 301 for (i = 0; i < count; ++i) { 302 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); 303 if (!skb) { 304 dev_err(dev, "Couldn't replenish rx buff\n"); 305 adapter->replenish_no_mem++; 306 break; 307 } 308 309 index = pool->free_map[pool->next_free]; 310 311 if (pool->rx_buff[index].skb) 312 dev_err(dev, "Inconsistent free_map!\n"); 313 314 /* Copy the skb to the long term mapped DMA buffer */ 315 offset = index * pool->buff_size; 316 dst = pool->long_term_buff.buff + offset; 317 memset(dst, 0, pool->buff_size); 318 dma_addr = pool->long_term_buff.addr + offset; 319 pool->rx_buff[index].data = dst; 320 321 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 322 pool->rx_buff[index].dma = dma_addr; 323 pool->rx_buff[index].skb = skb; 324 pool->rx_buff[index].pool_index = pool->index; 325 pool->rx_buff[index].size = pool->buff_size; 326 327 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 328 memset(sub_crq, 0, sizeof(*sub_crq)); 329 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 330 sub_crq->rx_add.correlator = 331 cpu_to_be64((u64)&pool->rx_buff[index]); 332 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 333 sub_crq->rx_add.map_id = pool->long_term_buff.map_id; 334 335 /* The length field of the sCRQ is defined to be 24 bits so the 336 * buffer size needs to be left shifted by a byte before it is 337 * converted to big endian to prevent the last byte from being 338 * truncated. 339 */ 340 #ifdef __LITTLE_ENDIAN__ 341 shift = 8; 342 #endif 343 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 344 pool->next_free = (pool->next_free + 1) % pool->size; 345 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 346 i == count - 1) { 347 lpar_rc = 348 send_subcrq_indirect(adapter, handle, 349 (u64)ind_bufp->indir_dma, 350 (u64)ind_bufp->index); 351 if (lpar_rc != H_SUCCESS) 352 goto failure; 353 buffers_added += ind_bufp->index; 354 adapter->replenish_add_buff_success += ind_bufp->index; 355 ind_bufp->index = 0; 356 } 357 } 358 atomic_add(buffers_added, &pool->available); 359 return; 360 361 failure: 362 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 363 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 364 for (i = ind_bufp->index - 1; i >= 0; --i) { 365 struct ibmvnic_rx_buff *rx_buff; 366 367 pool->next_free = pool->next_free == 0 ? 368 pool->size - 1 : pool->next_free - 1; 369 sub_crq = &ind_bufp->indir_arr[i]; 370 rx_buff = (struct ibmvnic_rx_buff *) 371 be64_to_cpu(sub_crq->rx_add.correlator); 372 index = (int)(rx_buff - pool->rx_buff); 373 pool->free_map[pool->next_free] = index; 374 dev_kfree_skb_any(pool->rx_buff[index].skb); 375 pool->rx_buff[index].skb = NULL; 376 } 377 adapter->replenish_add_buff_failure += ind_bufp->index; 378 atomic_add(buffers_added, &pool->available); 379 ind_bufp->index = 0; 380 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 381 /* Disable buffer pool replenishment and report carrier off if 382 * queue is closed or pending failover. 383 * Firmware guarantees that a signal will be sent to the 384 * driver, triggering a reset. 385 */ 386 deactivate_rx_pools(adapter); 387 netif_carrier_off(adapter->netdev); 388 } 389 } 390 391 static void replenish_pools(struct ibmvnic_adapter *adapter) 392 { 393 int i; 394 395 adapter->replenish_task_cycles++; 396 for (i = 0; i < adapter->num_active_rx_pools; i++) { 397 if (adapter->rx_pool[i].active) 398 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 399 } 400 401 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 402 } 403 404 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 405 { 406 kfree(adapter->tx_stats_buffers); 407 kfree(adapter->rx_stats_buffers); 408 adapter->tx_stats_buffers = NULL; 409 adapter->rx_stats_buffers = NULL; 410 } 411 412 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 413 { 414 adapter->tx_stats_buffers = 415 kcalloc(IBMVNIC_MAX_QUEUES, 416 sizeof(struct ibmvnic_tx_queue_stats), 417 GFP_KERNEL); 418 if (!adapter->tx_stats_buffers) 419 return -ENOMEM; 420 421 adapter->rx_stats_buffers = 422 kcalloc(IBMVNIC_MAX_QUEUES, 423 sizeof(struct ibmvnic_rx_queue_stats), 424 GFP_KERNEL); 425 if (!adapter->rx_stats_buffers) 426 return -ENOMEM; 427 428 return 0; 429 } 430 431 static void release_stats_token(struct ibmvnic_adapter *adapter) 432 { 433 struct device *dev = &adapter->vdev->dev; 434 435 if (!adapter->stats_token) 436 return; 437 438 dma_unmap_single(dev, adapter->stats_token, 439 sizeof(struct ibmvnic_statistics), 440 DMA_FROM_DEVICE); 441 adapter->stats_token = 0; 442 } 443 444 static int init_stats_token(struct ibmvnic_adapter *adapter) 445 { 446 struct device *dev = &adapter->vdev->dev; 447 dma_addr_t stok; 448 449 stok = dma_map_single(dev, &adapter->stats, 450 sizeof(struct ibmvnic_statistics), 451 DMA_FROM_DEVICE); 452 if (dma_mapping_error(dev, stok)) { 453 dev_err(dev, "Couldn't map stats buffer\n"); 454 return -1; 455 } 456 457 adapter->stats_token = stok; 458 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 459 return 0; 460 } 461 462 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 463 { 464 struct ibmvnic_rx_pool *rx_pool; 465 u64 buff_size; 466 int rx_scrqs; 467 int i, j, rc; 468 469 if (!adapter->rx_pool) 470 return -1; 471 472 buff_size = adapter->cur_rx_buf_sz; 473 rx_scrqs = adapter->num_active_rx_pools; 474 for (i = 0; i < rx_scrqs; i++) { 475 rx_pool = &adapter->rx_pool[i]; 476 477 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 478 479 if (rx_pool->buff_size != buff_size) { 480 free_long_term_buff(adapter, &rx_pool->long_term_buff); 481 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 482 rc = alloc_long_term_buff(adapter, 483 &rx_pool->long_term_buff, 484 rx_pool->size * 485 rx_pool->buff_size); 486 } else { 487 rc = reset_long_term_buff(&rx_pool->long_term_buff); 488 } 489 490 if (rc) 491 return rc; 492 493 for (j = 0; j < rx_pool->size; j++) 494 rx_pool->free_map[j] = j; 495 496 memset(rx_pool->rx_buff, 0, 497 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 498 499 atomic_set(&rx_pool->available, 0); 500 rx_pool->next_alloc = 0; 501 rx_pool->next_free = 0; 502 rx_pool->active = 1; 503 } 504 505 return 0; 506 } 507 508 static void release_rx_pools(struct ibmvnic_adapter *adapter) 509 { 510 struct ibmvnic_rx_pool *rx_pool; 511 int i, j; 512 513 if (!adapter->rx_pool) 514 return; 515 516 for (i = 0; i < adapter->num_active_rx_pools; i++) { 517 rx_pool = &adapter->rx_pool[i]; 518 519 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 520 521 kfree(rx_pool->free_map); 522 free_long_term_buff(adapter, &rx_pool->long_term_buff); 523 524 if (!rx_pool->rx_buff) 525 continue; 526 527 for (j = 0; j < rx_pool->size; j++) { 528 if (rx_pool->rx_buff[j].skb) { 529 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 530 rx_pool->rx_buff[j].skb = NULL; 531 } 532 } 533 534 kfree(rx_pool->rx_buff); 535 } 536 537 kfree(adapter->rx_pool); 538 adapter->rx_pool = NULL; 539 adapter->num_active_rx_pools = 0; 540 } 541 542 static int init_rx_pools(struct net_device *netdev) 543 { 544 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 545 struct device *dev = &adapter->vdev->dev; 546 struct ibmvnic_rx_pool *rx_pool; 547 int rxadd_subcrqs; 548 u64 buff_size; 549 int i, j; 550 551 rxadd_subcrqs = adapter->num_active_rx_scrqs; 552 buff_size = adapter->cur_rx_buf_sz; 553 554 adapter->rx_pool = kcalloc(rxadd_subcrqs, 555 sizeof(struct ibmvnic_rx_pool), 556 GFP_KERNEL); 557 if (!adapter->rx_pool) { 558 dev_err(dev, "Failed to allocate rx pools\n"); 559 return -1; 560 } 561 562 adapter->num_active_rx_pools = rxadd_subcrqs; 563 564 for (i = 0; i < rxadd_subcrqs; i++) { 565 rx_pool = &adapter->rx_pool[i]; 566 567 netdev_dbg(adapter->netdev, 568 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 569 i, adapter->req_rx_add_entries_per_subcrq, 570 buff_size); 571 572 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 573 rx_pool->index = i; 574 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 575 rx_pool->active = 1; 576 577 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 578 GFP_KERNEL); 579 if (!rx_pool->free_map) { 580 release_rx_pools(adapter); 581 return -1; 582 } 583 584 rx_pool->rx_buff = kcalloc(rx_pool->size, 585 sizeof(struct ibmvnic_rx_buff), 586 GFP_KERNEL); 587 if (!rx_pool->rx_buff) { 588 dev_err(dev, "Couldn't alloc rx buffers\n"); 589 release_rx_pools(adapter); 590 return -1; 591 } 592 593 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 594 rx_pool->size * rx_pool->buff_size)) { 595 release_rx_pools(adapter); 596 return -1; 597 } 598 599 for (j = 0; j < rx_pool->size; ++j) 600 rx_pool->free_map[j] = j; 601 602 atomic_set(&rx_pool->available, 0); 603 rx_pool->next_alloc = 0; 604 rx_pool->next_free = 0; 605 } 606 607 return 0; 608 } 609 610 static int reset_one_tx_pool(struct ibmvnic_tx_pool *tx_pool) 611 { 612 int rc, i; 613 614 rc = reset_long_term_buff(&tx_pool->long_term_buff); 615 if (rc) 616 return rc; 617 618 memset(tx_pool->tx_buff, 0, 619 tx_pool->num_buffers * 620 sizeof(struct ibmvnic_tx_buff)); 621 622 for (i = 0; i < tx_pool->num_buffers; i++) 623 tx_pool->free_map[i] = i; 624 625 tx_pool->consumer_index = 0; 626 tx_pool->producer_index = 0; 627 628 return 0; 629 } 630 631 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 632 { 633 int tx_scrqs; 634 int i, rc; 635 636 if (!adapter->tx_pool) 637 return -1; 638 639 tx_scrqs = adapter->num_active_tx_pools; 640 for (i = 0; i < tx_scrqs; i++) { 641 rc = reset_one_tx_pool(&adapter->tso_pool[i]); 642 if (rc) 643 return rc; 644 rc = reset_one_tx_pool(&adapter->tx_pool[i]); 645 if (rc) 646 return rc; 647 } 648 649 return 0; 650 } 651 652 static void release_vpd_data(struct ibmvnic_adapter *adapter) 653 { 654 if (!adapter->vpd) 655 return; 656 657 kfree(adapter->vpd->buff); 658 kfree(adapter->vpd); 659 660 adapter->vpd = NULL; 661 } 662 663 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 664 struct ibmvnic_tx_pool *tx_pool) 665 { 666 kfree(tx_pool->tx_buff); 667 kfree(tx_pool->free_map); 668 free_long_term_buff(adapter, &tx_pool->long_term_buff); 669 } 670 671 static void release_tx_pools(struct ibmvnic_adapter *adapter) 672 { 673 int i; 674 675 if (!adapter->tx_pool) 676 return; 677 678 for (i = 0; i < adapter->num_active_tx_pools; i++) { 679 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 680 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 681 } 682 683 kfree(adapter->tx_pool); 684 adapter->tx_pool = NULL; 685 kfree(adapter->tso_pool); 686 adapter->tso_pool = NULL; 687 adapter->num_active_tx_pools = 0; 688 } 689 690 static int init_one_tx_pool(struct net_device *netdev, 691 struct ibmvnic_tx_pool *tx_pool, 692 int num_entries, int buf_size) 693 { 694 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 695 int i; 696 697 tx_pool->tx_buff = kcalloc(num_entries, 698 sizeof(struct ibmvnic_tx_buff), 699 GFP_KERNEL); 700 if (!tx_pool->tx_buff) 701 return -1; 702 703 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 704 num_entries * buf_size)) 705 return -1; 706 707 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 708 if (!tx_pool->free_map) 709 return -1; 710 711 for (i = 0; i < num_entries; i++) 712 tx_pool->free_map[i] = i; 713 714 tx_pool->consumer_index = 0; 715 tx_pool->producer_index = 0; 716 tx_pool->num_buffers = num_entries; 717 tx_pool->buf_size = buf_size; 718 719 return 0; 720 } 721 722 static int init_tx_pools(struct net_device *netdev) 723 { 724 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 725 int tx_subcrqs; 726 u64 buff_size; 727 int i, rc; 728 729 tx_subcrqs = adapter->num_active_tx_scrqs; 730 adapter->tx_pool = kcalloc(tx_subcrqs, 731 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 732 if (!adapter->tx_pool) 733 return -1; 734 735 adapter->tso_pool = kcalloc(tx_subcrqs, 736 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 737 if (!adapter->tso_pool) 738 return -1; 739 740 adapter->num_active_tx_pools = tx_subcrqs; 741 742 for (i = 0; i < tx_subcrqs; i++) { 743 buff_size = adapter->req_mtu + VLAN_HLEN; 744 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 745 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 746 adapter->req_tx_entries_per_subcrq, 747 buff_size); 748 if (rc) { 749 release_tx_pools(adapter); 750 return rc; 751 } 752 753 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 754 IBMVNIC_TSO_BUFS, 755 IBMVNIC_TSO_BUF_SZ); 756 if (rc) { 757 release_tx_pools(adapter); 758 return rc; 759 } 760 } 761 762 return 0; 763 } 764 765 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 766 { 767 int i; 768 769 if (adapter->napi_enabled) 770 return; 771 772 for (i = 0; i < adapter->req_rx_queues; i++) 773 napi_enable(&adapter->napi[i]); 774 775 adapter->napi_enabled = true; 776 } 777 778 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 779 { 780 int i; 781 782 if (!adapter->napi_enabled) 783 return; 784 785 for (i = 0; i < adapter->req_rx_queues; i++) { 786 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 787 napi_disable(&adapter->napi[i]); 788 } 789 790 adapter->napi_enabled = false; 791 } 792 793 static int init_napi(struct ibmvnic_adapter *adapter) 794 { 795 int i; 796 797 adapter->napi = kcalloc(adapter->req_rx_queues, 798 sizeof(struct napi_struct), GFP_KERNEL); 799 if (!adapter->napi) 800 return -ENOMEM; 801 802 for (i = 0; i < adapter->req_rx_queues; i++) { 803 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 804 netif_napi_add(adapter->netdev, &adapter->napi[i], 805 ibmvnic_poll, NAPI_POLL_WEIGHT); 806 } 807 808 adapter->num_active_rx_napi = adapter->req_rx_queues; 809 return 0; 810 } 811 812 static void release_napi(struct ibmvnic_adapter *adapter) 813 { 814 int i; 815 816 if (!adapter->napi) 817 return; 818 819 for (i = 0; i < adapter->num_active_rx_napi; i++) { 820 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 821 netif_napi_del(&adapter->napi[i]); 822 } 823 824 kfree(adapter->napi); 825 adapter->napi = NULL; 826 adapter->num_active_rx_napi = 0; 827 adapter->napi_enabled = false; 828 } 829 830 static int ibmvnic_login(struct net_device *netdev) 831 { 832 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 833 unsigned long timeout = msecs_to_jiffies(20000); 834 int retry_count = 0; 835 int retries = 10; 836 bool retry; 837 int rc; 838 839 do { 840 retry = false; 841 if (retry_count > retries) { 842 netdev_warn(netdev, "Login attempts exceeded\n"); 843 return -1; 844 } 845 846 adapter->init_done_rc = 0; 847 reinit_completion(&adapter->init_done); 848 rc = send_login(adapter); 849 if (rc) 850 return rc; 851 852 if (!wait_for_completion_timeout(&adapter->init_done, 853 timeout)) { 854 netdev_warn(netdev, "Login timed out, retrying...\n"); 855 retry = true; 856 adapter->init_done_rc = 0; 857 retry_count++; 858 continue; 859 } 860 861 if (adapter->init_done_rc == ABORTED) { 862 netdev_warn(netdev, "Login aborted, retrying...\n"); 863 retry = true; 864 adapter->init_done_rc = 0; 865 retry_count++; 866 /* FW or device may be busy, so 867 * wait a bit before retrying login 868 */ 869 msleep(500); 870 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 871 retry_count++; 872 release_sub_crqs(adapter, 1); 873 874 retry = true; 875 netdev_dbg(netdev, 876 "Received partial success, retrying...\n"); 877 adapter->init_done_rc = 0; 878 reinit_completion(&adapter->init_done); 879 send_query_cap(adapter); 880 if (!wait_for_completion_timeout(&adapter->init_done, 881 timeout)) { 882 netdev_warn(netdev, 883 "Capabilities query timed out\n"); 884 return -1; 885 } 886 887 rc = init_sub_crqs(adapter); 888 if (rc) { 889 netdev_warn(netdev, 890 "SCRQ initialization failed\n"); 891 return -1; 892 } 893 894 rc = init_sub_crq_irqs(adapter); 895 if (rc) { 896 netdev_warn(netdev, 897 "SCRQ irq initialization failed\n"); 898 return -1; 899 } 900 } else if (adapter->init_done_rc) { 901 netdev_warn(netdev, "Adapter login failed\n"); 902 return -1; 903 } 904 } while (retry); 905 906 __ibmvnic_set_mac(netdev, adapter->mac_addr); 907 908 netdev_dbg(netdev, "[S:%d] Login succeeded\n", adapter->state); 909 return 0; 910 } 911 912 static void release_login_buffer(struct ibmvnic_adapter *adapter) 913 { 914 kfree(adapter->login_buf); 915 adapter->login_buf = NULL; 916 } 917 918 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 919 { 920 kfree(adapter->login_rsp_buf); 921 adapter->login_rsp_buf = NULL; 922 } 923 924 static void release_resources(struct ibmvnic_adapter *adapter) 925 { 926 release_vpd_data(adapter); 927 928 release_tx_pools(adapter); 929 release_rx_pools(adapter); 930 931 release_napi(adapter); 932 release_login_buffer(adapter); 933 release_login_rsp_buffer(adapter); 934 } 935 936 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 937 { 938 struct net_device *netdev = adapter->netdev; 939 unsigned long timeout = msecs_to_jiffies(20000); 940 union ibmvnic_crq crq; 941 bool resend; 942 int rc; 943 944 netdev_dbg(netdev, "setting link state %d\n", link_state); 945 946 memset(&crq, 0, sizeof(crq)); 947 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 948 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 949 crq.logical_link_state.link_state = link_state; 950 951 do { 952 resend = false; 953 954 reinit_completion(&adapter->init_done); 955 rc = ibmvnic_send_crq(adapter, &crq); 956 if (rc) { 957 netdev_err(netdev, "Failed to set link state\n"); 958 return rc; 959 } 960 961 if (!wait_for_completion_timeout(&adapter->init_done, 962 timeout)) { 963 netdev_err(netdev, "timeout setting link state\n"); 964 return -1; 965 } 966 967 if (adapter->init_done_rc == PARTIALSUCCESS) { 968 /* Partuial success, delay and re-send */ 969 mdelay(1000); 970 resend = true; 971 } else if (adapter->init_done_rc) { 972 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 973 adapter->init_done_rc); 974 return adapter->init_done_rc; 975 } 976 } while (resend); 977 978 return 0; 979 } 980 981 static int set_real_num_queues(struct net_device *netdev) 982 { 983 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 984 int rc; 985 986 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 987 adapter->req_tx_queues, adapter->req_rx_queues); 988 989 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 990 if (rc) { 991 netdev_err(netdev, "failed to set the number of tx queues\n"); 992 return rc; 993 } 994 995 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 996 if (rc) 997 netdev_err(netdev, "failed to set the number of rx queues\n"); 998 999 return rc; 1000 } 1001 1002 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1003 { 1004 struct device *dev = &adapter->vdev->dev; 1005 union ibmvnic_crq crq; 1006 int len = 0; 1007 int rc; 1008 1009 if (adapter->vpd->buff) 1010 len = adapter->vpd->len; 1011 1012 mutex_lock(&adapter->fw_lock); 1013 adapter->fw_done_rc = 0; 1014 reinit_completion(&adapter->fw_done); 1015 1016 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1017 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1018 rc = ibmvnic_send_crq(adapter, &crq); 1019 if (rc) { 1020 mutex_unlock(&adapter->fw_lock); 1021 return rc; 1022 } 1023 1024 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1025 if (rc) { 1026 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1027 mutex_unlock(&adapter->fw_lock); 1028 return rc; 1029 } 1030 mutex_unlock(&adapter->fw_lock); 1031 1032 if (!adapter->vpd->len) 1033 return -ENODATA; 1034 1035 if (!adapter->vpd->buff) 1036 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1037 else if (adapter->vpd->len != len) 1038 adapter->vpd->buff = 1039 krealloc(adapter->vpd->buff, 1040 adapter->vpd->len, GFP_KERNEL); 1041 1042 if (!adapter->vpd->buff) { 1043 dev_err(dev, "Could allocate VPD buffer\n"); 1044 return -ENOMEM; 1045 } 1046 1047 adapter->vpd->dma_addr = 1048 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1049 DMA_FROM_DEVICE); 1050 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1051 dev_err(dev, "Could not map VPD buffer\n"); 1052 kfree(adapter->vpd->buff); 1053 adapter->vpd->buff = NULL; 1054 return -ENOMEM; 1055 } 1056 1057 mutex_lock(&adapter->fw_lock); 1058 adapter->fw_done_rc = 0; 1059 reinit_completion(&adapter->fw_done); 1060 1061 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1062 crq.get_vpd.cmd = GET_VPD; 1063 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1064 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1065 rc = ibmvnic_send_crq(adapter, &crq); 1066 if (rc) { 1067 kfree(adapter->vpd->buff); 1068 adapter->vpd->buff = NULL; 1069 mutex_unlock(&adapter->fw_lock); 1070 return rc; 1071 } 1072 1073 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1074 if (rc) { 1075 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1076 kfree(adapter->vpd->buff); 1077 adapter->vpd->buff = NULL; 1078 mutex_unlock(&adapter->fw_lock); 1079 return rc; 1080 } 1081 1082 mutex_unlock(&adapter->fw_lock); 1083 return 0; 1084 } 1085 1086 static int init_resources(struct ibmvnic_adapter *adapter) 1087 { 1088 struct net_device *netdev = adapter->netdev; 1089 int rc; 1090 1091 rc = set_real_num_queues(netdev); 1092 if (rc) 1093 return rc; 1094 1095 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1096 if (!adapter->vpd) 1097 return -ENOMEM; 1098 1099 /* Vital Product Data (VPD) */ 1100 rc = ibmvnic_get_vpd(adapter); 1101 if (rc) { 1102 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1103 return rc; 1104 } 1105 1106 adapter->map_id = 1; 1107 1108 rc = init_napi(adapter); 1109 if (rc) 1110 return rc; 1111 1112 send_query_map(adapter); 1113 1114 rc = init_rx_pools(netdev); 1115 if (rc) 1116 return rc; 1117 1118 rc = init_tx_pools(netdev); 1119 return rc; 1120 } 1121 1122 static int __ibmvnic_open(struct net_device *netdev) 1123 { 1124 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1125 enum vnic_state prev_state = adapter->state; 1126 int i, rc; 1127 1128 adapter->state = VNIC_OPENING; 1129 replenish_pools(adapter); 1130 ibmvnic_napi_enable(adapter); 1131 1132 /* We're ready to receive frames, enable the sub-crq interrupts and 1133 * set the logical link state to up 1134 */ 1135 for (i = 0; i < adapter->req_rx_queues; i++) { 1136 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1137 if (prev_state == VNIC_CLOSED) 1138 enable_irq(adapter->rx_scrq[i]->irq); 1139 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1140 } 1141 1142 for (i = 0; i < adapter->req_tx_queues; i++) { 1143 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1144 if (prev_state == VNIC_CLOSED) 1145 enable_irq(adapter->tx_scrq[i]->irq); 1146 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1147 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1148 } 1149 1150 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1151 if (rc) { 1152 for (i = 0; i < adapter->req_rx_queues; i++) 1153 napi_disable(&adapter->napi[i]); 1154 release_resources(adapter); 1155 return rc; 1156 } 1157 1158 netif_tx_start_all_queues(netdev); 1159 1160 if (prev_state == VNIC_CLOSED) { 1161 for (i = 0; i < adapter->req_rx_queues; i++) 1162 napi_schedule(&adapter->napi[i]); 1163 } 1164 1165 adapter->state = VNIC_OPEN; 1166 return rc; 1167 } 1168 1169 static int ibmvnic_open(struct net_device *netdev) 1170 { 1171 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1172 int rc; 1173 1174 ASSERT_RTNL(); 1175 1176 /* If device failover is pending or we are about to reset, just set 1177 * device state and return. Device operation will be handled by reset 1178 * routine. 1179 * 1180 * It should be safe to overwrite the adapter->state here. Since 1181 * we hold the rtnl, either the reset has not actually started or 1182 * the rtnl got dropped during the set_link_state() in do_reset(). 1183 * In the former case, no one else is changing the state (again we 1184 * have the rtnl) and in the latter case, do_reset() will detect and 1185 * honor our setting below. 1186 */ 1187 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1188 netdev_dbg(netdev, "[S:%d FOP:%d] Resetting, deferring open\n", 1189 adapter->state, adapter->failover_pending); 1190 adapter->state = VNIC_OPEN; 1191 rc = 0; 1192 goto out; 1193 } 1194 1195 if (adapter->state != VNIC_CLOSED) { 1196 rc = ibmvnic_login(netdev); 1197 if (rc) 1198 goto out; 1199 1200 rc = init_resources(adapter); 1201 if (rc) { 1202 netdev_err(netdev, "failed to initialize resources\n"); 1203 release_resources(adapter); 1204 goto out; 1205 } 1206 } 1207 1208 rc = __ibmvnic_open(netdev); 1209 1210 out: 1211 /* If open failed and there is a pending failover or in-progress reset, 1212 * set device state and return. Device operation will be handled by 1213 * reset routine. See also comments above regarding rtnl. 1214 */ 1215 if (rc && 1216 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1217 adapter->state = VNIC_OPEN; 1218 rc = 0; 1219 } 1220 return rc; 1221 } 1222 1223 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1224 { 1225 struct ibmvnic_rx_pool *rx_pool; 1226 struct ibmvnic_rx_buff *rx_buff; 1227 u64 rx_entries; 1228 int rx_scrqs; 1229 int i, j; 1230 1231 if (!adapter->rx_pool) 1232 return; 1233 1234 rx_scrqs = adapter->num_active_rx_pools; 1235 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1236 1237 /* Free any remaining skbs in the rx buffer pools */ 1238 for (i = 0; i < rx_scrqs; i++) { 1239 rx_pool = &adapter->rx_pool[i]; 1240 if (!rx_pool || !rx_pool->rx_buff) 1241 continue; 1242 1243 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1244 for (j = 0; j < rx_entries; j++) { 1245 rx_buff = &rx_pool->rx_buff[j]; 1246 if (rx_buff && rx_buff->skb) { 1247 dev_kfree_skb_any(rx_buff->skb); 1248 rx_buff->skb = NULL; 1249 } 1250 } 1251 } 1252 } 1253 1254 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1255 struct ibmvnic_tx_pool *tx_pool) 1256 { 1257 struct ibmvnic_tx_buff *tx_buff; 1258 u64 tx_entries; 1259 int i; 1260 1261 if (!tx_pool || !tx_pool->tx_buff) 1262 return; 1263 1264 tx_entries = tx_pool->num_buffers; 1265 1266 for (i = 0; i < tx_entries; i++) { 1267 tx_buff = &tx_pool->tx_buff[i]; 1268 if (tx_buff && tx_buff->skb) { 1269 dev_kfree_skb_any(tx_buff->skb); 1270 tx_buff->skb = NULL; 1271 } 1272 } 1273 } 1274 1275 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1276 { 1277 int tx_scrqs; 1278 int i; 1279 1280 if (!adapter->tx_pool || !adapter->tso_pool) 1281 return; 1282 1283 tx_scrqs = adapter->num_active_tx_pools; 1284 1285 /* Free any remaining skbs in the tx buffer pools */ 1286 for (i = 0; i < tx_scrqs; i++) { 1287 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1288 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1289 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1290 } 1291 } 1292 1293 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1294 { 1295 struct net_device *netdev = adapter->netdev; 1296 int i; 1297 1298 if (adapter->tx_scrq) { 1299 for (i = 0; i < adapter->req_tx_queues; i++) 1300 if (adapter->tx_scrq[i]->irq) { 1301 netdev_dbg(netdev, 1302 "Disabling tx_scrq[%d] irq\n", i); 1303 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1304 disable_irq(adapter->tx_scrq[i]->irq); 1305 } 1306 } 1307 1308 if (adapter->rx_scrq) { 1309 for (i = 0; i < adapter->req_rx_queues; i++) { 1310 if (adapter->rx_scrq[i]->irq) { 1311 netdev_dbg(netdev, 1312 "Disabling rx_scrq[%d] irq\n", i); 1313 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1314 disable_irq(adapter->rx_scrq[i]->irq); 1315 } 1316 } 1317 } 1318 } 1319 1320 static void ibmvnic_cleanup(struct net_device *netdev) 1321 { 1322 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1323 1324 /* ensure that transmissions are stopped if called by do_reset */ 1325 if (test_bit(0, &adapter->resetting)) 1326 netif_tx_disable(netdev); 1327 else 1328 netif_tx_stop_all_queues(netdev); 1329 1330 ibmvnic_napi_disable(adapter); 1331 ibmvnic_disable_irqs(adapter); 1332 1333 clean_rx_pools(adapter); 1334 clean_tx_pools(adapter); 1335 } 1336 1337 static int __ibmvnic_close(struct net_device *netdev) 1338 { 1339 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1340 int rc = 0; 1341 1342 adapter->state = VNIC_CLOSING; 1343 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1344 adapter->state = VNIC_CLOSED; 1345 return rc; 1346 } 1347 1348 static int ibmvnic_close(struct net_device *netdev) 1349 { 1350 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1351 int rc; 1352 1353 netdev_dbg(netdev, "[S:%d FOP:%d FRR:%d] Closing\n", 1354 adapter->state, adapter->failover_pending, 1355 adapter->force_reset_recovery); 1356 1357 /* If device failover is pending, just set device state and return. 1358 * Device operation will be handled by reset routine. 1359 */ 1360 if (adapter->failover_pending) { 1361 adapter->state = VNIC_CLOSED; 1362 return 0; 1363 } 1364 1365 rc = __ibmvnic_close(netdev); 1366 ibmvnic_cleanup(netdev); 1367 1368 return rc; 1369 } 1370 1371 /** 1372 * build_hdr_data - creates L2/L3/L4 header data buffer 1373 * @hdr_field: bitfield determining needed headers 1374 * @skb: socket buffer 1375 * @hdr_len: array of header lengths 1376 * @hdr_data: buffer to write the header to 1377 * 1378 * Reads hdr_field to determine which headers are needed by firmware. 1379 * Builds a buffer containing these headers. Saves individual header 1380 * lengths and total buffer length to be used to build descriptors. 1381 */ 1382 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1383 int *hdr_len, u8 *hdr_data) 1384 { 1385 int len = 0; 1386 u8 *hdr; 1387 1388 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1389 hdr_len[0] = sizeof(struct vlan_ethhdr); 1390 else 1391 hdr_len[0] = sizeof(struct ethhdr); 1392 1393 if (skb->protocol == htons(ETH_P_IP)) { 1394 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1395 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1396 hdr_len[2] = tcp_hdrlen(skb); 1397 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1398 hdr_len[2] = sizeof(struct udphdr); 1399 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1400 hdr_len[1] = sizeof(struct ipv6hdr); 1401 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1402 hdr_len[2] = tcp_hdrlen(skb); 1403 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1404 hdr_len[2] = sizeof(struct udphdr); 1405 } else if (skb->protocol == htons(ETH_P_ARP)) { 1406 hdr_len[1] = arp_hdr_len(skb->dev); 1407 hdr_len[2] = 0; 1408 } 1409 1410 memset(hdr_data, 0, 120); 1411 if ((hdr_field >> 6) & 1) { 1412 hdr = skb_mac_header(skb); 1413 memcpy(hdr_data, hdr, hdr_len[0]); 1414 len += hdr_len[0]; 1415 } 1416 1417 if ((hdr_field >> 5) & 1) { 1418 hdr = skb_network_header(skb); 1419 memcpy(hdr_data + len, hdr, hdr_len[1]); 1420 len += hdr_len[1]; 1421 } 1422 1423 if ((hdr_field >> 4) & 1) { 1424 hdr = skb_transport_header(skb); 1425 memcpy(hdr_data + len, hdr, hdr_len[2]); 1426 len += hdr_len[2]; 1427 } 1428 return len; 1429 } 1430 1431 /** 1432 * create_hdr_descs - create header and header extension descriptors 1433 * @hdr_field: bitfield determining needed headers 1434 * @hdr_data: buffer containing header data 1435 * @len: length of data buffer 1436 * @hdr_len: array of individual header lengths 1437 * @scrq_arr: descriptor array 1438 * 1439 * Creates header and, if needed, header extension descriptors and 1440 * places them in a descriptor array, scrq_arr 1441 */ 1442 1443 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1444 union sub_crq *scrq_arr) 1445 { 1446 union sub_crq hdr_desc; 1447 int tmp_len = len; 1448 int num_descs = 0; 1449 u8 *data, *cur; 1450 int tmp; 1451 1452 while (tmp_len > 0) { 1453 cur = hdr_data + len - tmp_len; 1454 1455 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1456 if (cur != hdr_data) { 1457 data = hdr_desc.hdr_ext.data; 1458 tmp = tmp_len > 29 ? 29 : tmp_len; 1459 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1460 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1461 hdr_desc.hdr_ext.len = tmp; 1462 } else { 1463 data = hdr_desc.hdr.data; 1464 tmp = tmp_len > 24 ? 24 : tmp_len; 1465 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1466 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1467 hdr_desc.hdr.len = tmp; 1468 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1469 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1470 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1471 hdr_desc.hdr.flag = hdr_field << 1; 1472 } 1473 memcpy(data, cur, tmp); 1474 tmp_len -= tmp; 1475 *scrq_arr = hdr_desc; 1476 scrq_arr++; 1477 num_descs++; 1478 } 1479 1480 return num_descs; 1481 } 1482 1483 /** 1484 * build_hdr_descs_arr - build a header descriptor array 1485 * @txbuff: tx buffer 1486 * @num_entries: number of descriptors to be sent 1487 * @hdr_field: bit field determining which headers will be sent 1488 * 1489 * This function will build a TX descriptor array with applicable 1490 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1491 */ 1492 1493 static void build_hdr_descs_arr(struct sk_buff *skb, 1494 union sub_crq *indir_arr, 1495 int *num_entries, u8 hdr_field) 1496 { 1497 int hdr_len[3] = {0, 0, 0}; 1498 u8 hdr_data[140] = {0}; 1499 int tot_len; 1500 1501 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 1502 hdr_data); 1503 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1504 indir_arr + 1); 1505 } 1506 1507 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1508 struct net_device *netdev) 1509 { 1510 /* For some backing devices, mishandling of small packets 1511 * can result in a loss of connection or TX stall. Device 1512 * architects recommend that no packet should be smaller 1513 * than the minimum MTU value provided to the driver, so 1514 * pad any packets to that length 1515 */ 1516 if (skb->len < netdev->min_mtu) 1517 return skb_put_padto(skb, netdev->min_mtu); 1518 1519 return 0; 1520 } 1521 1522 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 1523 struct ibmvnic_sub_crq_queue *tx_scrq) 1524 { 1525 struct ibmvnic_ind_xmit_queue *ind_bufp; 1526 struct ibmvnic_tx_buff *tx_buff; 1527 struct ibmvnic_tx_pool *tx_pool; 1528 union sub_crq tx_scrq_entry; 1529 int queue_num; 1530 int entries; 1531 int index; 1532 int i; 1533 1534 ind_bufp = &tx_scrq->ind_buf; 1535 entries = (u64)ind_bufp->index; 1536 queue_num = tx_scrq->pool_index; 1537 1538 for (i = entries - 1; i >= 0; --i) { 1539 tx_scrq_entry = ind_bufp->indir_arr[i]; 1540 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 1541 continue; 1542 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 1543 if (index & IBMVNIC_TSO_POOL_MASK) { 1544 tx_pool = &adapter->tso_pool[queue_num]; 1545 index &= ~IBMVNIC_TSO_POOL_MASK; 1546 } else { 1547 tx_pool = &adapter->tx_pool[queue_num]; 1548 } 1549 tx_pool->free_map[tx_pool->consumer_index] = index; 1550 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1551 tx_pool->num_buffers - 1 : 1552 tx_pool->consumer_index - 1; 1553 tx_buff = &tx_pool->tx_buff[index]; 1554 adapter->netdev->stats.tx_packets--; 1555 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 1556 adapter->tx_stats_buffers[queue_num].packets--; 1557 adapter->tx_stats_buffers[queue_num].bytes -= 1558 tx_buff->skb->len; 1559 dev_kfree_skb_any(tx_buff->skb); 1560 tx_buff->skb = NULL; 1561 adapter->netdev->stats.tx_dropped++; 1562 } 1563 ind_bufp->index = 0; 1564 if (atomic_sub_return(entries, &tx_scrq->used) <= 1565 (adapter->req_tx_entries_per_subcrq / 2) && 1566 __netif_subqueue_stopped(adapter->netdev, queue_num)) { 1567 netif_wake_subqueue(adapter->netdev, queue_num); 1568 netdev_dbg(adapter->netdev, "Started queue %d\n", 1569 queue_num); 1570 } 1571 } 1572 1573 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 1574 struct ibmvnic_sub_crq_queue *tx_scrq) 1575 { 1576 struct ibmvnic_ind_xmit_queue *ind_bufp; 1577 u64 dma_addr; 1578 u64 entries; 1579 u64 handle; 1580 int rc; 1581 1582 ind_bufp = &tx_scrq->ind_buf; 1583 dma_addr = (u64)ind_bufp->indir_dma; 1584 entries = (u64)ind_bufp->index; 1585 handle = tx_scrq->handle; 1586 1587 if (!entries) 1588 return 0; 1589 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 1590 if (rc) 1591 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 1592 else 1593 ind_bufp->index = 0; 1594 return 0; 1595 } 1596 1597 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1598 { 1599 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1600 int queue_num = skb_get_queue_mapping(skb); 1601 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1602 struct device *dev = &adapter->vdev->dev; 1603 struct ibmvnic_ind_xmit_queue *ind_bufp; 1604 struct ibmvnic_tx_buff *tx_buff = NULL; 1605 struct ibmvnic_sub_crq_queue *tx_scrq; 1606 struct ibmvnic_tx_pool *tx_pool; 1607 unsigned int tx_send_failed = 0; 1608 netdev_tx_t ret = NETDEV_TX_OK; 1609 unsigned int tx_map_failed = 0; 1610 union sub_crq indir_arr[16]; 1611 unsigned int tx_dropped = 0; 1612 unsigned int tx_packets = 0; 1613 unsigned int tx_bytes = 0; 1614 dma_addr_t data_dma_addr; 1615 struct netdev_queue *txq; 1616 unsigned long lpar_rc; 1617 union sub_crq tx_crq; 1618 unsigned int offset; 1619 int num_entries = 1; 1620 unsigned char *dst; 1621 int index = 0; 1622 u8 proto = 0; 1623 1624 tx_scrq = adapter->tx_scrq[queue_num]; 1625 txq = netdev_get_tx_queue(netdev, queue_num); 1626 ind_bufp = &tx_scrq->ind_buf; 1627 1628 if (test_bit(0, &adapter->resetting)) { 1629 if (!netif_subqueue_stopped(netdev, skb)) 1630 netif_stop_subqueue(netdev, queue_num); 1631 dev_kfree_skb_any(skb); 1632 1633 tx_send_failed++; 1634 tx_dropped++; 1635 ret = NETDEV_TX_OK; 1636 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1637 goto out; 1638 } 1639 1640 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1641 tx_dropped++; 1642 tx_send_failed++; 1643 ret = NETDEV_TX_OK; 1644 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1645 goto out; 1646 } 1647 if (skb_is_gso(skb)) 1648 tx_pool = &adapter->tso_pool[queue_num]; 1649 else 1650 tx_pool = &adapter->tx_pool[queue_num]; 1651 1652 index = tx_pool->free_map[tx_pool->consumer_index]; 1653 1654 if (index == IBMVNIC_INVALID_MAP) { 1655 dev_kfree_skb_any(skb); 1656 tx_send_failed++; 1657 tx_dropped++; 1658 ret = NETDEV_TX_OK; 1659 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1660 goto out; 1661 } 1662 1663 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1664 1665 offset = index * tx_pool->buf_size; 1666 dst = tx_pool->long_term_buff.buff + offset; 1667 memset(dst, 0, tx_pool->buf_size); 1668 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1669 1670 if (skb_shinfo(skb)->nr_frags) { 1671 int cur, i; 1672 1673 /* Copy the head */ 1674 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1675 cur = skb_headlen(skb); 1676 1677 /* Copy the frags */ 1678 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1679 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1680 1681 memcpy(dst + cur, 1682 page_address(skb_frag_page(frag)) + 1683 skb_frag_off(frag), skb_frag_size(frag)); 1684 cur += skb_frag_size(frag); 1685 } 1686 } else { 1687 skb_copy_from_linear_data(skb, dst, skb->len); 1688 } 1689 1690 /* post changes to long_term_buff *dst before VIOS accessing it */ 1691 dma_wmb(); 1692 1693 tx_pool->consumer_index = 1694 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1695 1696 tx_buff = &tx_pool->tx_buff[index]; 1697 tx_buff->skb = skb; 1698 tx_buff->index = index; 1699 tx_buff->pool_index = queue_num; 1700 1701 memset(&tx_crq, 0, sizeof(tx_crq)); 1702 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1703 tx_crq.v1.type = IBMVNIC_TX_DESC; 1704 tx_crq.v1.n_crq_elem = 1; 1705 tx_crq.v1.n_sge = 1; 1706 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1707 1708 if (skb_is_gso(skb)) 1709 tx_crq.v1.correlator = 1710 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1711 else 1712 tx_crq.v1.correlator = cpu_to_be32(index); 1713 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1714 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1715 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1716 1717 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1718 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1719 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1720 } 1721 1722 if (skb->protocol == htons(ETH_P_IP)) { 1723 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1724 proto = ip_hdr(skb)->protocol; 1725 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1726 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1727 proto = ipv6_hdr(skb)->nexthdr; 1728 } 1729 1730 if (proto == IPPROTO_TCP) 1731 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1732 else if (proto == IPPROTO_UDP) 1733 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1734 1735 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1736 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1737 hdrs += 2; 1738 } 1739 if (skb_is_gso(skb)) { 1740 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1741 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1742 hdrs += 2; 1743 } 1744 1745 if ((*hdrs >> 7) & 1) 1746 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 1747 1748 tx_crq.v1.n_crq_elem = num_entries; 1749 tx_buff->num_entries = num_entries; 1750 /* flush buffer if current entry can not fit */ 1751 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 1752 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1753 if (lpar_rc != H_SUCCESS) 1754 goto tx_flush_err; 1755 } 1756 1757 indir_arr[0] = tx_crq; 1758 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 1759 num_entries * sizeof(struct ibmvnic_generic_scrq)); 1760 ind_bufp->index += num_entries; 1761 if (__netdev_tx_sent_queue(txq, skb->len, 1762 netdev_xmit_more() && 1763 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 1764 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1765 if (lpar_rc != H_SUCCESS) 1766 goto tx_err; 1767 } 1768 1769 if (atomic_add_return(num_entries, &tx_scrq->used) 1770 >= adapter->req_tx_entries_per_subcrq) { 1771 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1772 netif_stop_subqueue(netdev, queue_num); 1773 } 1774 1775 tx_packets++; 1776 tx_bytes += skb->len; 1777 txq->trans_start = jiffies; 1778 ret = NETDEV_TX_OK; 1779 goto out; 1780 1781 tx_flush_err: 1782 dev_kfree_skb_any(skb); 1783 tx_buff->skb = NULL; 1784 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1785 tx_pool->num_buffers - 1 : 1786 tx_pool->consumer_index - 1; 1787 tx_dropped++; 1788 tx_err: 1789 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1790 dev_err_ratelimited(dev, "tx: send failed\n"); 1791 1792 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1793 /* Disable TX and report carrier off if queue is closed 1794 * or pending failover. 1795 * Firmware guarantees that a signal will be sent to the 1796 * driver, triggering a reset or some other action. 1797 */ 1798 netif_tx_stop_all_queues(netdev); 1799 netif_carrier_off(netdev); 1800 } 1801 out: 1802 netdev->stats.tx_dropped += tx_dropped; 1803 netdev->stats.tx_bytes += tx_bytes; 1804 netdev->stats.tx_packets += tx_packets; 1805 adapter->tx_send_failed += tx_send_failed; 1806 adapter->tx_map_failed += tx_map_failed; 1807 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1808 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1809 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1810 1811 return ret; 1812 } 1813 1814 static void ibmvnic_set_multi(struct net_device *netdev) 1815 { 1816 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1817 struct netdev_hw_addr *ha; 1818 union ibmvnic_crq crq; 1819 1820 memset(&crq, 0, sizeof(crq)); 1821 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1822 crq.request_capability.cmd = REQUEST_CAPABILITY; 1823 1824 if (netdev->flags & IFF_PROMISC) { 1825 if (!adapter->promisc_supported) 1826 return; 1827 } else { 1828 if (netdev->flags & IFF_ALLMULTI) { 1829 /* Accept all multicast */ 1830 memset(&crq, 0, sizeof(crq)); 1831 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1832 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1833 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1834 ibmvnic_send_crq(adapter, &crq); 1835 } else if (netdev_mc_empty(netdev)) { 1836 /* Reject all multicast */ 1837 memset(&crq, 0, sizeof(crq)); 1838 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1839 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1840 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1841 ibmvnic_send_crq(adapter, &crq); 1842 } else { 1843 /* Accept one or more multicast(s) */ 1844 netdev_for_each_mc_addr(ha, netdev) { 1845 memset(&crq, 0, sizeof(crq)); 1846 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1847 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1848 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1849 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1850 ha->addr); 1851 ibmvnic_send_crq(adapter, &crq); 1852 } 1853 } 1854 } 1855 } 1856 1857 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1858 { 1859 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1860 union ibmvnic_crq crq; 1861 int rc; 1862 1863 if (!is_valid_ether_addr(dev_addr)) { 1864 rc = -EADDRNOTAVAIL; 1865 goto err; 1866 } 1867 1868 memset(&crq, 0, sizeof(crq)); 1869 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1870 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1871 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1872 1873 mutex_lock(&adapter->fw_lock); 1874 adapter->fw_done_rc = 0; 1875 reinit_completion(&adapter->fw_done); 1876 1877 rc = ibmvnic_send_crq(adapter, &crq); 1878 if (rc) { 1879 rc = -EIO; 1880 mutex_unlock(&adapter->fw_lock); 1881 goto err; 1882 } 1883 1884 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1885 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1886 if (rc || adapter->fw_done_rc) { 1887 rc = -EIO; 1888 mutex_unlock(&adapter->fw_lock); 1889 goto err; 1890 } 1891 mutex_unlock(&adapter->fw_lock); 1892 return 0; 1893 err: 1894 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1895 return rc; 1896 } 1897 1898 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1899 { 1900 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1901 struct sockaddr *addr = p; 1902 int rc; 1903 1904 rc = 0; 1905 if (!is_valid_ether_addr(addr->sa_data)) 1906 return -EADDRNOTAVAIL; 1907 1908 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1909 if (adapter->state != VNIC_PROBED) 1910 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1911 1912 return rc; 1913 } 1914 1915 /* 1916 * do_reset returns zero if we are able to keep processing reset events, or 1917 * non-zero if we hit a fatal error and must halt. 1918 */ 1919 static int do_reset(struct ibmvnic_adapter *adapter, 1920 struct ibmvnic_rwi *rwi, u32 reset_state) 1921 { 1922 u64 old_num_rx_queues, old_num_tx_queues; 1923 u64 old_num_rx_slots, old_num_tx_slots; 1924 struct net_device *netdev = adapter->netdev; 1925 int i, rc; 1926 1927 netdev_dbg(adapter->netdev, 1928 "[S:%d FOP:%d] Reset reason %d, reset_state %d\n", 1929 adapter->state, adapter->failover_pending, 1930 rwi->reset_reason, reset_state); 1931 1932 adapter->reset_reason = rwi->reset_reason; 1933 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 1934 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 1935 rtnl_lock(); 1936 1937 /* Now that we have the rtnl lock, clear any pending failover. 1938 * This will ensure ibmvnic_open() has either completed or will 1939 * block until failover is complete. 1940 */ 1941 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 1942 adapter->failover_pending = false; 1943 1944 /* read the state and check (again) after getting rtnl */ 1945 reset_state = adapter->state; 1946 1947 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 1948 rc = -EBUSY; 1949 goto out; 1950 } 1951 1952 netif_carrier_off(netdev); 1953 1954 old_num_rx_queues = adapter->req_rx_queues; 1955 old_num_tx_queues = adapter->req_tx_queues; 1956 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1957 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1958 1959 ibmvnic_cleanup(netdev); 1960 1961 if (reset_state == VNIC_OPEN && 1962 adapter->reset_reason != VNIC_RESET_MOBILITY && 1963 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1964 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 1965 rc = __ibmvnic_close(netdev); 1966 if (rc) 1967 goto out; 1968 } else { 1969 adapter->state = VNIC_CLOSING; 1970 1971 /* Release the RTNL lock before link state change and 1972 * re-acquire after the link state change to allow 1973 * linkwatch_event to grab the RTNL lock and run during 1974 * a reset. 1975 */ 1976 rtnl_unlock(); 1977 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1978 rtnl_lock(); 1979 if (rc) 1980 goto out; 1981 1982 if (adapter->state == VNIC_OPEN) { 1983 /* When we dropped rtnl, ibmvnic_open() got 1984 * it and noticed that we are resetting and 1985 * set the adapter state to OPEN. Update our 1986 * new "target" state, and resume the reset 1987 * from VNIC_CLOSING state. 1988 */ 1989 netdev_dbg(netdev, 1990 "Open changed state from %d, updating.\n", 1991 reset_state); 1992 reset_state = VNIC_OPEN; 1993 adapter->state = VNIC_CLOSING; 1994 } 1995 1996 if (adapter->state != VNIC_CLOSING) { 1997 /* If someone else changed the adapter state 1998 * when we dropped the rtnl, fail the reset 1999 */ 2000 rc = -1; 2001 goto out; 2002 } 2003 adapter->state = VNIC_CLOSED; 2004 } 2005 } 2006 2007 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2008 release_resources(adapter); 2009 release_sub_crqs(adapter, 1); 2010 release_crq_queue(adapter); 2011 } 2012 2013 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2014 /* remove the closed state so when we call open it appears 2015 * we are coming from the probed state. 2016 */ 2017 adapter->state = VNIC_PROBED; 2018 2019 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2020 rc = init_crq_queue(adapter); 2021 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2022 rc = ibmvnic_reenable_crq_queue(adapter); 2023 release_sub_crqs(adapter, 1); 2024 } else { 2025 rc = ibmvnic_reset_crq(adapter); 2026 if (rc == H_CLOSED || rc == H_SUCCESS) { 2027 rc = vio_enable_interrupts(adapter->vdev); 2028 if (rc) 2029 netdev_err(adapter->netdev, 2030 "Reset failed to enable interrupts. rc=%d\n", 2031 rc); 2032 } 2033 } 2034 2035 if (rc) { 2036 netdev_err(adapter->netdev, 2037 "Reset couldn't initialize crq. rc=%d\n", rc); 2038 goto out; 2039 } 2040 2041 rc = ibmvnic_reset_init(adapter, true); 2042 if (rc) { 2043 rc = IBMVNIC_INIT_FAILED; 2044 goto out; 2045 } 2046 2047 /* If the adapter was in PROBE state prior to the reset, 2048 * exit here. 2049 */ 2050 if (reset_state == VNIC_PROBED) { 2051 rc = 0; 2052 goto out; 2053 } 2054 2055 rc = ibmvnic_login(netdev); 2056 if (rc) 2057 goto out; 2058 2059 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2060 rc = init_resources(adapter); 2061 if (rc) 2062 goto out; 2063 } else if (adapter->req_rx_queues != old_num_rx_queues || 2064 adapter->req_tx_queues != old_num_tx_queues || 2065 adapter->req_rx_add_entries_per_subcrq != 2066 old_num_rx_slots || 2067 adapter->req_tx_entries_per_subcrq != 2068 old_num_tx_slots || 2069 !adapter->rx_pool || 2070 !adapter->tso_pool || 2071 !adapter->tx_pool) { 2072 release_rx_pools(adapter); 2073 release_tx_pools(adapter); 2074 release_napi(adapter); 2075 release_vpd_data(adapter); 2076 2077 rc = init_resources(adapter); 2078 if (rc) 2079 goto out; 2080 2081 } else { 2082 rc = reset_tx_pools(adapter); 2083 if (rc) { 2084 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2085 rc); 2086 goto out; 2087 } 2088 2089 rc = reset_rx_pools(adapter); 2090 if (rc) { 2091 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2092 rc); 2093 goto out; 2094 } 2095 } 2096 ibmvnic_disable_irqs(adapter); 2097 } 2098 adapter->state = VNIC_CLOSED; 2099 2100 if (reset_state == VNIC_CLOSED) { 2101 rc = 0; 2102 goto out; 2103 } 2104 2105 rc = __ibmvnic_open(netdev); 2106 if (rc) { 2107 rc = IBMVNIC_OPEN_FAILED; 2108 goto out; 2109 } 2110 2111 /* refresh device's multicast list */ 2112 ibmvnic_set_multi(netdev); 2113 2114 /* kick napi */ 2115 for (i = 0; i < adapter->req_rx_queues; i++) 2116 napi_schedule(&adapter->napi[i]); 2117 2118 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2119 adapter->reset_reason == VNIC_RESET_MOBILITY) 2120 __netdev_notify_peers(netdev); 2121 2122 rc = 0; 2123 2124 out: 2125 /* restore the adapter state if reset failed */ 2126 if (rc) 2127 adapter->state = reset_state; 2128 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2129 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2130 rtnl_unlock(); 2131 2132 netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Reset done, rc %d\n", 2133 adapter->state, adapter->failover_pending, rc); 2134 return rc; 2135 } 2136 2137 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2138 struct ibmvnic_rwi *rwi, u32 reset_state) 2139 { 2140 struct net_device *netdev = adapter->netdev; 2141 int rc; 2142 2143 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2144 rwi->reset_reason); 2145 2146 /* read the state and check (again) after getting rtnl */ 2147 reset_state = adapter->state; 2148 2149 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2150 rc = -EBUSY; 2151 goto out; 2152 } 2153 2154 netif_carrier_off(netdev); 2155 adapter->reset_reason = rwi->reset_reason; 2156 2157 ibmvnic_cleanup(netdev); 2158 release_resources(adapter); 2159 release_sub_crqs(adapter, 0); 2160 release_crq_queue(adapter); 2161 2162 /* remove the closed state so when we call open it appears 2163 * we are coming from the probed state. 2164 */ 2165 adapter->state = VNIC_PROBED; 2166 2167 reinit_completion(&adapter->init_done); 2168 rc = init_crq_queue(adapter); 2169 if (rc) { 2170 netdev_err(adapter->netdev, 2171 "Couldn't initialize crq. rc=%d\n", rc); 2172 goto out; 2173 } 2174 2175 rc = ibmvnic_reset_init(adapter, false); 2176 if (rc) 2177 goto out; 2178 2179 /* If the adapter was in PROBE state prior to the reset, 2180 * exit here. 2181 */ 2182 if (reset_state == VNIC_PROBED) 2183 goto out; 2184 2185 rc = ibmvnic_login(netdev); 2186 if (rc) 2187 goto out; 2188 2189 rc = init_resources(adapter); 2190 if (rc) 2191 goto out; 2192 2193 ibmvnic_disable_irqs(adapter); 2194 adapter->state = VNIC_CLOSED; 2195 2196 if (reset_state == VNIC_CLOSED) 2197 goto out; 2198 2199 rc = __ibmvnic_open(netdev); 2200 if (rc) { 2201 rc = IBMVNIC_OPEN_FAILED; 2202 goto out; 2203 } 2204 2205 __netdev_notify_peers(netdev); 2206 out: 2207 /* restore adapter state if reset failed */ 2208 if (rc) 2209 adapter->state = reset_state; 2210 netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Hard reset done, rc %d\n", 2211 adapter->state, adapter->failover_pending, rc); 2212 return rc; 2213 } 2214 2215 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2216 { 2217 struct ibmvnic_rwi *rwi; 2218 unsigned long flags; 2219 2220 spin_lock_irqsave(&adapter->rwi_lock, flags); 2221 2222 if (!list_empty(&adapter->rwi_list)) { 2223 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2224 list); 2225 list_del(&rwi->list); 2226 } else { 2227 rwi = NULL; 2228 } 2229 2230 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2231 return rwi; 2232 } 2233 2234 static void __ibmvnic_reset(struct work_struct *work) 2235 { 2236 struct ibmvnic_rwi *rwi; 2237 struct ibmvnic_adapter *adapter; 2238 bool saved_state = false; 2239 unsigned long flags; 2240 u32 reset_state; 2241 int rc = 0; 2242 2243 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2244 2245 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2246 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2247 IBMVNIC_RESET_DELAY); 2248 return; 2249 } 2250 2251 rwi = get_next_rwi(adapter); 2252 while (rwi) { 2253 spin_lock_irqsave(&adapter->state_lock, flags); 2254 2255 if (adapter->state == VNIC_REMOVING || 2256 adapter->state == VNIC_REMOVED) { 2257 spin_unlock_irqrestore(&adapter->state_lock, flags); 2258 kfree(rwi); 2259 rc = EBUSY; 2260 break; 2261 } 2262 2263 if (!saved_state) { 2264 reset_state = adapter->state; 2265 saved_state = true; 2266 } 2267 spin_unlock_irqrestore(&adapter->state_lock, flags); 2268 2269 if (adapter->force_reset_recovery) { 2270 /* Since we are doing a hard reset now, clear the 2271 * failover_pending flag so we don't ignore any 2272 * future MOBILITY or other resets. 2273 */ 2274 adapter->failover_pending = false; 2275 2276 /* Transport event occurred during previous reset */ 2277 if (adapter->wait_for_reset) { 2278 /* Previous was CHANGE_PARAM; caller locked */ 2279 adapter->force_reset_recovery = false; 2280 rc = do_hard_reset(adapter, rwi, reset_state); 2281 } else { 2282 rtnl_lock(); 2283 adapter->force_reset_recovery = false; 2284 rc = do_hard_reset(adapter, rwi, reset_state); 2285 rtnl_unlock(); 2286 } 2287 if (rc) { 2288 /* give backing device time to settle down */ 2289 netdev_dbg(adapter->netdev, 2290 "[S:%d] Hard reset failed, waiting 60 secs\n", 2291 adapter->state); 2292 set_current_state(TASK_UNINTERRUPTIBLE); 2293 schedule_timeout(60 * HZ); 2294 } 2295 } else { 2296 rc = do_reset(adapter, rwi, reset_state); 2297 } 2298 kfree(rwi); 2299 adapter->last_reset_time = jiffies; 2300 2301 if (rc) 2302 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2303 2304 rwi = get_next_rwi(adapter); 2305 2306 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2307 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2308 adapter->force_reset_recovery = true; 2309 } 2310 2311 if (adapter->wait_for_reset) { 2312 adapter->reset_done_rc = rc; 2313 complete(&adapter->reset_done); 2314 } 2315 2316 clear_bit_unlock(0, &adapter->resetting); 2317 2318 netdev_dbg(adapter->netdev, 2319 "[S:%d FRR:%d WFR:%d] Done processing resets\n", 2320 adapter->state, adapter->force_reset_recovery, 2321 adapter->wait_for_reset); 2322 } 2323 2324 static void __ibmvnic_delayed_reset(struct work_struct *work) 2325 { 2326 struct ibmvnic_adapter *adapter; 2327 2328 adapter = container_of(work, struct ibmvnic_adapter, 2329 ibmvnic_delayed_reset.work); 2330 __ibmvnic_reset(&adapter->ibmvnic_reset); 2331 } 2332 2333 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2334 enum ibmvnic_reset_reason reason) 2335 { 2336 struct list_head *entry, *tmp_entry; 2337 struct ibmvnic_rwi *rwi, *tmp; 2338 struct net_device *netdev = adapter->netdev; 2339 unsigned long flags; 2340 int ret; 2341 2342 spin_lock_irqsave(&adapter->rwi_lock, flags); 2343 2344 /* If failover is pending don't schedule any other reset. 2345 * Instead let the failover complete. If there is already a 2346 * a failover reset scheduled, we will detect and drop the 2347 * duplicate reset when walking the ->rwi_list below. 2348 */ 2349 if (adapter->state == VNIC_REMOVING || 2350 adapter->state == VNIC_REMOVED || 2351 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2352 ret = EBUSY; 2353 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2354 goto err; 2355 } 2356 2357 if (adapter->state == VNIC_PROBING) { 2358 netdev_warn(netdev, "Adapter reset during probe\n"); 2359 adapter->init_done_rc = EAGAIN; 2360 ret = EAGAIN; 2361 goto err; 2362 } 2363 2364 list_for_each(entry, &adapter->rwi_list) { 2365 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2366 if (tmp->reset_reason == reason) { 2367 netdev_dbg(netdev, "Skipping matching reset, reason=%d\n", 2368 reason); 2369 ret = EBUSY; 2370 goto err; 2371 } 2372 } 2373 2374 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2375 if (!rwi) { 2376 ret = ENOMEM; 2377 goto err; 2378 } 2379 /* if we just received a transport event, 2380 * flush reset queue and process this reset 2381 */ 2382 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2383 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2384 list_del(entry); 2385 } 2386 rwi->reset_reason = reason; 2387 list_add_tail(&rwi->list, &adapter->rwi_list); 2388 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2389 schedule_work(&adapter->ibmvnic_reset); 2390 2391 ret = 0; 2392 err: 2393 /* ibmvnic_close() below can block, so drop the lock first */ 2394 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2395 2396 if (ret == ENOMEM) 2397 ibmvnic_close(netdev); 2398 2399 return -ret; 2400 } 2401 2402 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2403 { 2404 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2405 2406 if (test_bit(0, &adapter->resetting)) { 2407 netdev_err(adapter->netdev, 2408 "Adapter is resetting, skip timeout reset\n"); 2409 return; 2410 } 2411 /* No queuing up reset until at least 5 seconds (default watchdog val) 2412 * after last reset 2413 */ 2414 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2415 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2416 return; 2417 } 2418 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2419 } 2420 2421 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2422 struct ibmvnic_rx_buff *rx_buff) 2423 { 2424 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2425 2426 rx_buff->skb = NULL; 2427 2428 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2429 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2430 2431 atomic_dec(&pool->available); 2432 } 2433 2434 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2435 { 2436 struct ibmvnic_sub_crq_queue *rx_scrq; 2437 struct ibmvnic_adapter *adapter; 2438 struct net_device *netdev; 2439 int frames_processed; 2440 int scrq_num; 2441 2442 netdev = napi->dev; 2443 adapter = netdev_priv(netdev); 2444 scrq_num = (int)(napi - adapter->napi); 2445 frames_processed = 0; 2446 rx_scrq = adapter->rx_scrq[scrq_num]; 2447 2448 restart_poll: 2449 while (frames_processed < budget) { 2450 struct sk_buff *skb; 2451 struct ibmvnic_rx_buff *rx_buff; 2452 union sub_crq *next; 2453 u32 length; 2454 u16 offset; 2455 u8 flags = 0; 2456 2457 if (unlikely(test_bit(0, &adapter->resetting) && 2458 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2459 enable_scrq_irq(adapter, rx_scrq); 2460 napi_complete_done(napi, frames_processed); 2461 return frames_processed; 2462 } 2463 2464 if (!pending_scrq(adapter, rx_scrq)) 2465 break; 2466 next = ibmvnic_next_scrq(adapter, rx_scrq); 2467 rx_buff = (struct ibmvnic_rx_buff *) 2468 be64_to_cpu(next->rx_comp.correlator); 2469 /* do error checking */ 2470 if (next->rx_comp.rc) { 2471 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2472 be16_to_cpu(next->rx_comp.rc)); 2473 /* free the entry */ 2474 next->rx_comp.first = 0; 2475 dev_kfree_skb_any(rx_buff->skb); 2476 remove_buff_from_pool(adapter, rx_buff); 2477 continue; 2478 } else if (!rx_buff->skb) { 2479 /* free the entry */ 2480 next->rx_comp.first = 0; 2481 remove_buff_from_pool(adapter, rx_buff); 2482 continue; 2483 } 2484 2485 length = be32_to_cpu(next->rx_comp.len); 2486 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2487 flags = next->rx_comp.flags; 2488 skb = rx_buff->skb; 2489 /* load long_term_buff before copying to skb */ 2490 dma_rmb(); 2491 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2492 length); 2493 2494 /* VLAN Header has been stripped by the system firmware and 2495 * needs to be inserted by the driver 2496 */ 2497 if (adapter->rx_vlan_header_insertion && 2498 (flags & IBMVNIC_VLAN_STRIPPED)) 2499 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2500 ntohs(next->rx_comp.vlan_tci)); 2501 2502 /* free the entry */ 2503 next->rx_comp.first = 0; 2504 remove_buff_from_pool(adapter, rx_buff); 2505 2506 skb_put(skb, length); 2507 skb->protocol = eth_type_trans(skb, netdev); 2508 skb_record_rx_queue(skb, scrq_num); 2509 2510 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2511 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2512 skb->ip_summed = CHECKSUM_UNNECESSARY; 2513 } 2514 2515 length = skb->len; 2516 napi_gro_receive(napi, skb); /* send it up */ 2517 netdev->stats.rx_packets++; 2518 netdev->stats.rx_bytes += length; 2519 adapter->rx_stats_buffers[scrq_num].packets++; 2520 adapter->rx_stats_buffers[scrq_num].bytes += length; 2521 frames_processed++; 2522 } 2523 2524 if (adapter->state != VNIC_CLOSING && 2525 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2526 adapter->req_rx_add_entries_per_subcrq / 2) || 2527 frames_processed < budget)) 2528 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2529 if (frames_processed < budget) { 2530 if (napi_complete_done(napi, frames_processed)) { 2531 enable_scrq_irq(adapter, rx_scrq); 2532 if (pending_scrq(adapter, rx_scrq)) { 2533 if (napi_reschedule(napi)) { 2534 disable_scrq_irq(adapter, rx_scrq); 2535 goto restart_poll; 2536 } 2537 } 2538 } 2539 } 2540 return frames_processed; 2541 } 2542 2543 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2544 { 2545 int rc, ret; 2546 2547 adapter->fallback.mtu = adapter->req_mtu; 2548 adapter->fallback.rx_queues = adapter->req_rx_queues; 2549 adapter->fallback.tx_queues = adapter->req_tx_queues; 2550 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2551 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2552 2553 reinit_completion(&adapter->reset_done); 2554 adapter->wait_for_reset = true; 2555 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2556 2557 if (rc) { 2558 ret = rc; 2559 goto out; 2560 } 2561 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2562 if (rc) { 2563 ret = -ENODEV; 2564 goto out; 2565 } 2566 2567 ret = 0; 2568 if (adapter->reset_done_rc) { 2569 ret = -EIO; 2570 adapter->desired.mtu = adapter->fallback.mtu; 2571 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2572 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2573 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2574 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2575 2576 reinit_completion(&adapter->reset_done); 2577 adapter->wait_for_reset = true; 2578 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2579 if (rc) { 2580 ret = rc; 2581 goto out; 2582 } 2583 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2584 60000); 2585 if (rc) { 2586 ret = -ENODEV; 2587 goto out; 2588 } 2589 } 2590 out: 2591 adapter->wait_for_reset = false; 2592 2593 return ret; 2594 } 2595 2596 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2597 { 2598 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2599 2600 adapter->desired.mtu = new_mtu + ETH_HLEN; 2601 2602 return wait_for_reset(adapter); 2603 } 2604 2605 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2606 struct net_device *dev, 2607 netdev_features_t features) 2608 { 2609 /* Some backing hardware adapters can not 2610 * handle packets with a MSS less than 224 2611 * or with only one segment. 2612 */ 2613 if (skb_is_gso(skb)) { 2614 if (skb_shinfo(skb)->gso_size < 224 || 2615 skb_shinfo(skb)->gso_segs == 1) 2616 features &= ~NETIF_F_GSO_MASK; 2617 } 2618 2619 return features; 2620 } 2621 2622 static const struct net_device_ops ibmvnic_netdev_ops = { 2623 .ndo_open = ibmvnic_open, 2624 .ndo_stop = ibmvnic_close, 2625 .ndo_start_xmit = ibmvnic_xmit, 2626 .ndo_set_rx_mode = ibmvnic_set_multi, 2627 .ndo_set_mac_address = ibmvnic_set_mac, 2628 .ndo_validate_addr = eth_validate_addr, 2629 .ndo_tx_timeout = ibmvnic_tx_timeout, 2630 .ndo_change_mtu = ibmvnic_change_mtu, 2631 .ndo_features_check = ibmvnic_features_check, 2632 }; 2633 2634 /* ethtool functions */ 2635 2636 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2637 struct ethtool_link_ksettings *cmd) 2638 { 2639 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2640 int rc; 2641 2642 rc = send_query_phys_parms(adapter); 2643 if (rc) { 2644 adapter->speed = SPEED_UNKNOWN; 2645 adapter->duplex = DUPLEX_UNKNOWN; 2646 } 2647 cmd->base.speed = adapter->speed; 2648 cmd->base.duplex = adapter->duplex; 2649 cmd->base.port = PORT_FIBRE; 2650 cmd->base.phy_address = 0; 2651 cmd->base.autoneg = AUTONEG_ENABLE; 2652 2653 return 0; 2654 } 2655 2656 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2657 struct ethtool_drvinfo *info) 2658 { 2659 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2660 2661 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2662 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2663 strscpy(info->fw_version, adapter->fw_version, 2664 sizeof(info->fw_version)); 2665 } 2666 2667 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2668 { 2669 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2670 2671 return adapter->msg_enable; 2672 } 2673 2674 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2675 { 2676 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2677 2678 adapter->msg_enable = data; 2679 } 2680 2681 static u32 ibmvnic_get_link(struct net_device *netdev) 2682 { 2683 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2684 2685 /* Don't need to send a query because we request a logical link up at 2686 * init and then we wait for link state indications 2687 */ 2688 return adapter->logical_link_state; 2689 } 2690 2691 static void ibmvnic_get_ringparam(struct net_device *netdev, 2692 struct ethtool_ringparam *ring) 2693 { 2694 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2695 2696 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2697 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2698 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2699 } else { 2700 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2701 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2702 } 2703 ring->rx_mini_max_pending = 0; 2704 ring->rx_jumbo_max_pending = 0; 2705 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2706 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2707 ring->rx_mini_pending = 0; 2708 ring->rx_jumbo_pending = 0; 2709 } 2710 2711 static int ibmvnic_set_ringparam(struct net_device *netdev, 2712 struct ethtool_ringparam *ring) 2713 { 2714 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2715 int ret; 2716 2717 ret = 0; 2718 adapter->desired.rx_entries = ring->rx_pending; 2719 adapter->desired.tx_entries = ring->tx_pending; 2720 2721 ret = wait_for_reset(adapter); 2722 2723 if (!ret && 2724 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2725 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2726 netdev_info(netdev, 2727 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2728 ring->rx_pending, ring->tx_pending, 2729 adapter->req_rx_add_entries_per_subcrq, 2730 adapter->req_tx_entries_per_subcrq); 2731 return ret; 2732 } 2733 2734 static void ibmvnic_get_channels(struct net_device *netdev, 2735 struct ethtool_channels *channels) 2736 { 2737 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2738 2739 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2740 channels->max_rx = adapter->max_rx_queues; 2741 channels->max_tx = adapter->max_tx_queues; 2742 } else { 2743 channels->max_rx = IBMVNIC_MAX_QUEUES; 2744 channels->max_tx = IBMVNIC_MAX_QUEUES; 2745 } 2746 2747 channels->max_other = 0; 2748 channels->max_combined = 0; 2749 channels->rx_count = adapter->req_rx_queues; 2750 channels->tx_count = adapter->req_tx_queues; 2751 channels->other_count = 0; 2752 channels->combined_count = 0; 2753 } 2754 2755 static int ibmvnic_set_channels(struct net_device *netdev, 2756 struct ethtool_channels *channels) 2757 { 2758 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2759 int ret; 2760 2761 ret = 0; 2762 adapter->desired.rx_queues = channels->rx_count; 2763 adapter->desired.tx_queues = channels->tx_count; 2764 2765 ret = wait_for_reset(adapter); 2766 2767 if (!ret && 2768 (adapter->req_rx_queues != channels->rx_count || 2769 adapter->req_tx_queues != channels->tx_count)) 2770 netdev_info(netdev, 2771 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2772 channels->rx_count, channels->tx_count, 2773 adapter->req_rx_queues, adapter->req_tx_queues); 2774 return ret; 2775 } 2776 2777 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2778 { 2779 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2780 int i; 2781 2782 switch (stringset) { 2783 case ETH_SS_STATS: 2784 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2785 i++, data += ETH_GSTRING_LEN) 2786 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2787 2788 for (i = 0; i < adapter->req_tx_queues; i++) { 2789 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2790 data += ETH_GSTRING_LEN; 2791 2792 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2793 data += ETH_GSTRING_LEN; 2794 2795 snprintf(data, ETH_GSTRING_LEN, 2796 "tx%d_dropped_packets", i); 2797 data += ETH_GSTRING_LEN; 2798 } 2799 2800 for (i = 0; i < adapter->req_rx_queues; i++) { 2801 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2802 data += ETH_GSTRING_LEN; 2803 2804 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2805 data += ETH_GSTRING_LEN; 2806 2807 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2808 data += ETH_GSTRING_LEN; 2809 } 2810 break; 2811 2812 case ETH_SS_PRIV_FLAGS: 2813 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2814 strcpy(data + i * ETH_GSTRING_LEN, 2815 ibmvnic_priv_flags[i]); 2816 break; 2817 default: 2818 return; 2819 } 2820 } 2821 2822 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2823 { 2824 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2825 2826 switch (sset) { 2827 case ETH_SS_STATS: 2828 return ARRAY_SIZE(ibmvnic_stats) + 2829 adapter->req_tx_queues * NUM_TX_STATS + 2830 adapter->req_rx_queues * NUM_RX_STATS; 2831 case ETH_SS_PRIV_FLAGS: 2832 return ARRAY_SIZE(ibmvnic_priv_flags); 2833 default: 2834 return -EOPNOTSUPP; 2835 } 2836 } 2837 2838 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2839 struct ethtool_stats *stats, u64 *data) 2840 { 2841 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2842 union ibmvnic_crq crq; 2843 int i, j; 2844 int rc; 2845 2846 memset(&crq, 0, sizeof(crq)); 2847 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2848 crq.request_statistics.cmd = REQUEST_STATISTICS; 2849 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2850 crq.request_statistics.len = 2851 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2852 2853 /* Wait for data to be written */ 2854 reinit_completion(&adapter->stats_done); 2855 rc = ibmvnic_send_crq(adapter, &crq); 2856 if (rc) 2857 return; 2858 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2859 if (rc) 2860 return; 2861 2862 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2863 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 2864 (adapter, ibmvnic_stats[i].offset)); 2865 2866 for (j = 0; j < adapter->req_tx_queues; j++) { 2867 data[i] = adapter->tx_stats_buffers[j].packets; 2868 i++; 2869 data[i] = adapter->tx_stats_buffers[j].bytes; 2870 i++; 2871 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2872 i++; 2873 } 2874 2875 for (j = 0; j < adapter->req_rx_queues; j++) { 2876 data[i] = adapter->rx_stats_buffers[j].packets; 2877 i++; 2878 data[i] = adapter->rx_stats_buffers[j].bytes; 2879 i++; 2880 data[i] = adapter->rx_stats_buffers[j].interrupts; 2881 i++; 2882 } 2883 } 2884 2885 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2886 { 2887 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2888 2889 return adapter->priv_flags; 2890 } 2891 2892 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2893 { 2894 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2895 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2896 2897 if (which_maxes) 2898 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2899 else 2900 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2901 2902 return 0; 2903 } 2904 2905 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2906 .get_drvinfo = ibmvnic_get_drvinfo, 2907 .get_msglevel = ibmvnic_get_msglevel, 2908 .set_msglevel = ibmvnic_set_msglevel, 2909 .get_link = ibmvnic_get_link, 2910 .get_ringparam = ibmvnic_get_ringparam, 2911 .set_ringparam = ibmvnic_set_ringparam, 2912 .get_channels = ibmvnic_get_channels, 2913 .set_channels = ibmvnic_set_channels, 2914 .get_strings = ibmvnic_get_strings, 2915 .get_sset_count = ibmvnic_get_sset_count, 2916 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2917 .get_link_ksettings = ibmvnic_get_link_ksettings, 2918 .get_priv_flags = ibmvnic_get_priv_flags, 2919 .set_priv_flags = ibmvnic_set_priv_flags, 2920 }; 2921 2922 /* Routines for managing CRQs/sCRQs */ 2923 2924 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2925 struct ibmvnic_sub_crq_queue *scrq) 2926 { 2927 int rc; 2928 2929 if (!scrq) { 2930 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 2931 return -EINVAL; 2932 } 2933 2934 if (scrq->irq) { 2935 free_irq(scrq->irq, scrq); 2936 irq_dispose_mapping(scrq->irq); 2937 scrq->irq = 0; 2938 } 2939 2940 if (scrq->msgs) { 2941 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2942 atomic_set(&scrq->used, 0); 2943 scrq->cur = 0; 2944 scrq->ind_buf.index = 0; 2945 } else { 2946 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 2947 return -EINVAL; 2948 } 2949 2950 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2951 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2952 return rc; 2953 } 2954 2955 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2956 { 2957 int i, rc; 2958 2959 if (!adapter->tx_scrq || !adapter->rx_scrq) 2960 return -EINVAL; 2961 2962 for (i = 0; i < adapter->req_tx_queues; i++) { 2963 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2964 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2965 if (rc) 2966 return rc; 2967 } 2968 2969 for (i = 0; i < adapter->req_rx_queues; i++) { 2970 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2971 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2972 if (rc) 2973 return rc; 2974 } 2975 2976 return rc; 2977 } 2978 2979 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2980 struct ibmvnic_sub_crq_queue *scrq, 2981 bool do_h_free) 2982 { 2983 struct device *dev = &adapter->vdev->dev; 2984 long rc; 2985 2986 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2987 2988 if (do_h_free) { 2989 /* Close the sub-crqs */ 2990 do { 2991 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2992 adapter->vdev->unit_address, 2993 scrq->crq_num); 2994 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2995 2996 if (rc) { 2997 netdev_err(adapter->netdev, 2998 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2999 scrq->crq_num, rc); 3000 } 3001 } 3002 3003 dma_free_coherent(dev, 3004 IBMVNIC_IND_ARR_SZ, 3005 scrq->ind_buf.indir_arr, 3006 scrq->ind_buf.indir_dma); 3007 3008 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3009 DMA_BIDIRECTIONAL); 3010 free_pages((unsigned long)scrq->msgs, 2); 3011 kfree(scrq); 3012 } 3013 3014 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3015 *adapter) 3016 { 3017 struct device *dev = &adapter->vdev->dev; 3018 struct ibmvnic_sub_crq_queue *scrq; 3019 int rc; 3020 3021 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3022 if (!scrq) 3023 return NULL; 3024 3025 scrq->msgs = 3026 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3027 if (!scrq->msgs) { 3028 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3029 goto zero_page_failed; 3030 } 3031 3032 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3033 DMA_BIDIRECTIONAL); 3034 if (dma_mapping_error(dev, scrq->msg_token)) { 3035 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3036 goto map_failed; 3037 } 3038 3039 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3040 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3041 3042 if (rc == H_RESOURCE) 3043 rc = ibmvnic_reset_crq(adapter); 3044 3045 if (rc == H_CLOSED) { 3046 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3047 } else if (rc) { 3048 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3049 goto reg_failed; 3050 } 3051 3052 scrq->adapter = adapter; 3053 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3054 scrq->ind_buf.index = 0; 3055 3056 scrq->ind_buf.indir_arr = 3057 dma_alloc_coherent(dev, 3058 IBMVNIC_IND_ARR_SZ, 3059 &scrq->ind_buf.indir_dma, 3060 GFP_KERNEL); 3061 3062 if (!scrq->ind_buf.indir_arr) 3063 goto indir_failed; 3064 3065 spin_lock_init(&scrq->lock); 3066 3067 netdev_dbg(adapter->netdev, 3068 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3069 scrq->crq_num, scrq->hw_irq, scrq->irq); 3070 3071 return scrq; 3072 3073 indir_failed: 3074 do { 3075 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3076 adapter->vdev->unit_address, 3077 scrq->crq_num); 3078 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3079 reg_failed: 3080 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3081 DMA_BIDIRECTIONAL); 3082 map_failed: 3083 free_pages((unsigned long)scrq->msgs, 2); 3084 zero_page_failed: 3085 kfree(scrq); 3086 3087 return NULL; 3088 } 3089 3090 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3091 { 3092 int i; 3093 3094 if (adapter->tx_scrq) { 3095 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3096 if (!adapter->tx_scrq[i]) 3097 continue; 3098 3099 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3100 i); 3101 if (adapter->tx_scrq[i]->irq) { 3102 free_irq(adapter->tx_scrq[i]->irq, 3103 adapter->tx_scrq[i]); 3104 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3105 adapter->tx_scrq[i]->irq = 0; 3106 } 3107 3108 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3109 do_h_free); 3110 } 3111 3112 kfree(adapter->tx_scrq); 3113 adapter->tx_scrq = NULL; 3114 adapter->num_active_tx_scrqs = 0; 3115 } 3116 3117 if (adapter->rx_scrq) { 3118 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3119 if (!adapter->rx_scrq[i]) 3120 continue; 3121 3122 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3123 i); 3124 if (adapter->rx_scrq[i]->irq) { 3125 free_irq(adapter->rx_scrq[i]->irq, 3126 adapter->rx_scrq[i]); 3127 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3128 adapter->rx_scrq[i]->irq = 0; 3129 } 3130 3131 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3132 do_h_free); 3133 } 3134 3135 kfree(adapter->rx_scrq); 3136 adapter->rx_scrq = NULL; 3137 adapter->num_active_rx_scrqs = 0; 3138 } 3139 } 3140 3141 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3142 struct ibmvnic_sub_crq_queue *scrq) 3143 { 3144 struct device *dev = &adapter->vdev->dev; 3145 unsigned long rc; 3146 3147 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3148 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3149 if (rc) 3150 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3151 scrq->hw_irq, rc); 3152 return rc; 3153 } 3154 3155 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3156 struct ibmvnic_sub_crq_queue *scrq) 3157 { 3158 struct device *dev = &adapter->vdev->dev; 3159 unsigned long rc; 3160 3161 if (scrq->hw_irq > 0x100000000ULL) { 3162 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3163 return 1; 3164 } 3165 3166 if (test_bit(0, &adapter->resetting) && 3167 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3168 u64 val = (0xff000000) | scrq->hw_irq; 3169 3170 rc = plpar_hcall_norets(H_EOI, val); 3171 /* H_EOI would fail with rc = H_FUNCTION when running 3172 * in XIVE mode which is expected, but not an error. 3173 */ 3174 if (rc && rc != H_FUNCTION) 3175 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3176 val, rc); 3177 } 3178 3179 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3180 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3181 if (rc) 3182 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3183 scrq->hw_irq, rc); 3184 return rc; 3185 } 3186 3187 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3188 struct ibmvnic_sub_crq_queue *scrq) 3189 { 3190 struct device *dev = &adapter->vdev->dev; 3191 struct ibmvnic_tx_pool *tx_pool; 3192 struct ibmvnic_tx_buff *txbuff; 3193 struct netdev_queue *txq; 3194 union sub_crq *next; 3195 int index; 3196 int i; 3197 3198 restart_loop: 3199 while (pending_scrq(adapter, scrq)) { 3200 unsigned int pool = scrq->pool_index; 3201 int num_entries = 0; 3202 int total_bytes = 0; 3203 int num_packets = 0; 3204 3205 next = ibmvnic_next_scrq(adapter, scrq); 3206 for (i = 0; i < next->tx_comp.num_comps; i++) { 3207 if (next->tx_comp.rcs[i]) 3208 dev_err(dev, "tx error %x\n", 3209 next->tx_comp.rcs[i]); 3210 index = be32_to_cpu(next->tx_comp.correlators[i]); 3211 if (index & IBMVNIC_TSO_POOL_MASK) { 3212 tx_pool = &adapter->tso_pool[pool]; 3213 index &= ~IBMVNIC_TSO_POOL_MASK; 3214 } else { 3215 tx_pool = &adapter->tx_pool[pool]; 3216 } 3217 3218 txbuff = &tx_pool->tx_buff[index]; 3219 num_packets++; 3220 num_entries += txbuff->num_entries; 3221 if (txbuff->skb) { 3222 total_bytes += txbuff->skb->len; 3223 dev_consume_skb_irq(txbuff->skb); 3224 txbuff->skb = NULL; 3225 } else { 3226 netdev_warn(adapter->netdev, 3227 "TX completion received with NULL socket buffer\n"); 3228 } 3229 tx_pool->free_map[tx_pool->producer_index] = index; 3230 tx_pool->producer_index = 3231 (tx_pool->producer_index + 1) % 3232 tx_pool->num_buffers; 3233 } 3234 /* remove tx_comp scrq*/ 3235 next->tx_comp.first = 0; 3236 3237 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3238 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3239 3240 if (atomic_sub_return(num_entries, &scrq->used) <= 3241 (adapter->req_tx_entries_per_subcrq / 2) && 3242 __netif_subqueue_stopped(adapter->netdev, 3243 scrq->pool_index)) { 3244 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3245 netdev_dbg(adapter->netdev, "Started queue %d\n", 3246 scrq->pool_index); 3247 } 3248 } 3249 3250 enable_scrq_irq(adapter, scrq); 3251 3252 if (pending_scrq(adapter, scrq)) { 3253 disable_scrq_irq(adapter, scrq); 3254 goto restart_loop; 3255 } 3256 3257 return 0; 3258 } 3259 3260 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3261 { 3262 struct ibmvnic_sub_crq_queue *scrq = instance; 3263 struct ibmvnic_adapter *adapter = scrq->adapter; 3264 3265 disable_scrq_irq(adapter, scrq); 3266 ibmvnic_complete_tx(adapter, scrq); 3267 3268 return IRQ_HANDLED; 3269 } 3270 3271 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3272 { 3273 struct ibmvnic_sub_crq_queue *scrq = instance; 3274 struct ibmvnic_adapter *adapter = scrq->adapter; 3275 3276 /* When booting a kdump kernel we can hit pending interrupts 3277 * prior to completing driver initialization. 3278 */ 3279 if (unlikely(adapter->state != VNIC_OPEN)) 3280 return IRQ_NONE; 3281 3282 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3283 3284 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3285 disable_scrq_irq(adapter, scrq); 3286 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3287 } 3288 3289 return IRQ_HANDLED; 3290 } 3291 3292 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3293 { 3294 struct device *dev = &adapter->vdev->dev; 3295 struct ibmvnic_sub_crq_queue *scrq; 3296 int i = 0, j = 0; 3297 int rc = 0; 3298 3299 for (i = 0; i < adapter->req_tx_queues; i++) { 3300 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3301 i); 3302 scrq = adapter->tx_scrq[i]; 3303 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3304 3305 if (!scrq->irq) { 3306 rc = -EINVAL; 3307 dev_err(dev, "Error mapping irq\n"); 3308 goto req_tx_irq_failed; 3309 } 3310 3311 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3312 adapter->vdev->unit_address, i); 3313 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3314 0, scrq->name, scrq); 3315 3316 if (rc) { 3317 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3318 scrq->irq, rc); 3319 irq_dispose_mapping(scrq->irq); 3320 goto req_tx_irq_failed; 3321 } 3322 } 3323 3324 for (i = 0; i < adapter->req_rx_queues; i++) { 3325 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3326 i); 3327 scrq = adapter->rx_scrq[i]; 3328 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3329 if (!scrq->irq) { 3330 rc = -EINVAL; 3331 dev_err(dev, "Error mapping irq\n"); 3332 goto req_rx_irq_failed; 3333 } 3334 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3335 adapter->vdev->unit_address, i); 3336 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3337 0, scrq->name, scrq); 3338 if (rc) { 3339 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3340 scrq->irq, rc); 3341 irq_dispose_mapping(scrq->irq); 3342 goto req_rx_irq_failed; 3343 } 3344 } 3345 return rc; 3346 3347 req_rx_irq_failed: 3348 for (j = 0; j < i; j++) { 3349 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3350 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3351 } 3352 i = adapter->req_tx_queues; 3353 req_tx_irq_failed: 3354 for (j = 0; j < i; j++) { 3355 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3356 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3357 } 3358 release_sub_crqs(adapter, 1); 3359 return rc; 3360 } 3361 3362 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3363 { 3364 struct device *dev = &adapter->vdev->dev; 3365 struct ibmvnic_sub_crq_queue **allqueues; 3366 int registered_queues = 0; 3367 int total_queues; 3368 int more = 0; 3369 int i; 3370 3371 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3372 3373 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3374 if (!allqueues) 3375 return -1; 3376 3377 for (i = 0; i < total_queues; i++) { 3378 allqueues[i] = init_sub_crq_queue(adapter); 3379 if (!allqueues[i]) { 3380 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3381 break; 3382 } 3383 registered_queues++; 3384 } 3385 3386 /* Make sure we were able to register the minimum number of queues */ 3387 if (registered_queues < 3388 adapter->min_tx_queues + adapter->min_rx_queues) { 3389 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3390 goto tx_failed; 3391 } 3392 3393 /* Distribute the failed allocated queues*/ 3394 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3395 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3396 switch (i % 3) { 3397 case 0: 3398 if (adapter->req_rx_queues > adapter->min_rx_queues) 3399 adapter->req_rx_queues--; 3400 else 3401 more++; 3402 break; 3403 case 1: 3404 if (adapter->req_tx_queues > adapter->min_tx_queues) 3405 adapter->req_tx_queues--; 3406 else 3407 more++; 3408 break; 3409 } 3410 } 3411 3412 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3413 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3414 if (!adapter->tx_scrq) 3415 goto tx_failed; 3416 3417 for (i = 0; i < adapter->req_tx_queues; i++) { 3418 adapter->tx_scrq[i] = allqueues[i]; 3419 adapter->tx_scrq[i]->pool_index = i; 3420 adapter->num_active_tx_scrqs++; 3421 } 3422 3423 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3424 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3425 if (!adapter->rx_scrq) 3426 goto rx_failed; 3427 3428 for (i = 0; i < adapter->req_rx_queues; i++) { 3429 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3430 adapter->rx_scrq[i]->scrq_num = i; 3431 adapter->num_active_rx_scrqs++; 3432 } 3433 3434 kfree(allqueues); 3435 return 0; 3436 3437 rx_failed: 3438 kfree(adapter->tx_scrq); 3439 adapter->tx_scrq = NULL; 3440 tx_failed: 3441 for (i = 0; i < registered_queues; i++) 3442 release_sub_crq_queue(adapter, allqueues[i], 1); 3443 kfree(allqueues); 3444 return -1; 3445 } 3446 3447 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3448 { 3449 struct device *dev = &adapter->vdev->dev; 3450 union ibmvnic_crq crq; 3451 int max_entries; 3452 3453 if (!retry) { 3454 /* Sub-CRQ entries are 32 byte long */ 3455 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3456 3457 if (adapter->min_tx_entries_per_subcrq > entries_page || 3458 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3459 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3460 return; 3461 } 3462 3463 if (adapter->desired.mtu) 3464 adapter->req_mtu = adapter->desired.mtu; 3465 else 3466 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3467 3468 if (!adapter->desired.tx_entries) 3469 adapter->desired.tx_entries = 3470 adapter->max_tx_entries_per_subcrq; 3471 if (!adapter->desired.rx_entries) 3472 adapter->desired.rx_entries = 3473 adapter->max_rx_add_entries_per_subcrq; 3474 3475 max_entries = IBMVNIC_MAX_LTB_SIZE / 3476 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3477 3478 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3479 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3480 adapter->desired.tx_entries = max_entries; 3481 } 3482 3483 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3484 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3485 adapter->desired.rx_entries = max_entries; 3486 } 3487 3488 if (adapter->desired.tx_entries) 3489 adapter->req_tx_entries_per_subcrq = 3490 adapter->desired.tx_entries; 3491 else 3492 adapter->req_tx_entries_per_subcrq = 3493 adapter->max_tx_entries_per_subcrq; 3494 3495 if (adapter->desired.rx_entries) 3496 adapter->req_rx_add_entries_per_subcrq = 3497 adapter->desired.rx_entries; 3498 else 3499 adapter->req_rx_add_entries_per_subcrq = 3500 adapter->max_rx_add_entries_per_subcrq; 3501 3502 if (adapter->desired.tx_queues) 3503 adapter->req_tx_queues = 3504 adapter->desired.tx_queues; 3505 else 3506 adapter->req_tx_queues = 3507 adapter->opt_tx_comp_sub_queues; 3508 3509 if (adapter->desired.rx_queues) 3510 adapter->req_rx_queues = 3511 adapter->desired.rx_queues; 3512 else 3513 adapter->req_rx_queues = 3514 adapter->opt_rx_comp_queues; 3515 3516 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3517 } 3518 3519 memset(&crq, 0, sizeof(crq)); 3520 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3521 crq.request_capability.cmd = REQUEST_CAPABILITY; 3522 3523 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3524 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3525 atomic_inc(&adapter->running_cap_crqs); 3526 ibmvnic_send_crq(adapter, &crq); 3527 3528 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3529 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3530 atomic_inc(&adapter->running_cap_crqs); 3531 ibmvnic_send_crq(adapter, &crq); 3532 3533 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3534 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3535 atomic_inc(&adapter->running_cap_crqs); 3536 ibmvnic_send_crq(adapter, &crq); 3537 3538 crq.request_capability.capability = 3539 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3540 crq.request_capability.number = 3541 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3542 atomic_inc(&adapter->running_cap_crqs); 3543 ibmvnic_send_crq(adapter, &crq); 3544 3545 crq.request_capability.capability = 3546 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3547 crq.request_capability.number = 3548 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3549 atomic_inc(&adapter->running_cap_crqs); 3550 ibmvnic_send_crq(adapter, &crq); 3551 3552 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3553 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3554 atomic_inc(&adapter->running_cap_crqs); 3555 ibmvnic_send_crq(adapter, &crq); 3556 3557 if (adapter->netdev->flags & IFF_PROMISC) { 3558 if (adapter->promisc_supported) { 3559 crq.request_capability.capability = 3560 cpu_to_be16(PROMISC_REQUESTED); 3561 crq.request_capability.number = cpu_to_be64(1); 3562 atomic_inc(&adapter->running_cap_crqs); 3563 ibmvnic_send_crq(adapter, &crq); 3564 } 3565 } else { 3566 crq.request_capability.capability = 3567 cpu_to_be16(PROMISC_REQUESTED); 3568 crq.request_capability.number = cpu_to_be64(0); 3569 atomic_inc(&adapter->running_cap_crqs); 3570 ibmvnic_send_crq(adapter, &crq); 3571 } 3572 } 3573 3574 static int pending_scrq(struct ibmvnic_adapter *adapter, 3575 struct ibmvnic_sub_crq_queue *scrq) 3576 { 3577 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3578 int rc; 3579 3580 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 3581 3582 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3583 * contents of the SCRQ descriptor 3584 */ 3585 dma_rmb(); 3586 3587 return rc; 3588 } 3589 3590 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3591 struct ibmvnic_sub_crq_queue *scrq) 3592 { 3593 union sub_crq *entry; 3594 unsigned long flags; 3595 3596 spin_lock_irqsave(&scrq->lock, flags); 3597 entry = &scrq->msgs[scrq->cur]; 3598 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3599 if (++scrq->cur == scrq->size) 3600 scrq->cur = 0; 3601 } else { 3602 entry = NULL; 3603 } 3604 spin_unlock_irqrestore(&scrq->lock, flags); 3605 3606 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3607 * contents of the SCRQ descriptor 3608 */ 3609 dma_rmb(); 3610 3611 return entry; 3612 } 3613 3614 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3615 { 3616 struct ibmvnic_crq_queue *queue = &adapter->crq; 3617 union ibmvnic_crq *crq; 3618 3619 crq = &queue->msgs[queue->cur]; 3620 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3621 if (++queue->cur == queue->size) 3622 queue->cur = 0; 3623 } else { 3624 crq = NULL; 3625 } 3626 3627 return crq; 3628 } 3629 3630 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3631 { 3632 switch (rc) { 3633 case H_PARAMETER: 3634 dev_warn_ratelimited(dev, 3635 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3636 func, rc); 3637 break; 3638 case H_CLOSED: 3639 dev_warn_ratelimited(dev, 3640 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3641 func, rc); 3642 break; 3643 default: 3644 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3645 break; 3646 } 3647 } 3648 3649 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3650 u64 remote_handle, u64 ioba, u64 num_entries) 3651 { 3652 unsigned int ua = adapter->vdev->unit_address; 3653 struct device *dev = &adapter->vdev->dev; 3654 int rc; 3655 3656 /* Make sure the hypervisor sees the complete request */ 3657 dma_wmb(); 3658 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3659 cpu_to_be64(remote_handle), 3660 ioba, num_entries); 3661 3662 if (rc) 3663 print_subcrq_error(dev, rc, __func__); 3664 3665 return rc; 3666 } 3667 3668 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3669 union ibmvnic_crq *crq) 3670 { 3671 unsigned int ua = adapter->vdev->unit_address; 3672 struct device *dev = &adapter->vdev->dev; 3673 u64 *u64_crq = (u64 *)crq; 3674 int rc; 3675 3676 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3677 (unsigned long)cpu_to_be64(u64_crq[0]), 3678 (unsigned long)cpu_to_be64(u64_crq[1])); 3679 3680 if (!adapter->crq.active && 3681 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3682 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3683 return -EINVAL; 3684 } 3685 3686 /* Make sure the hypervisor sees the complete request */ 3687 dma_wmb(); 3688 3689 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3690 cpu_to_be64(u64_crq[0]), 3691 cpu_to_be64(u64_crq[1])); 3692 3693 if (rc) { 3694 if (rc == H_CLOSED) { 3695 dev_warn(dev, "CRQ Queue closed\n"); 3696 /* do not reset, report the fail, wait for passive init from server */ 3697 } 3698 3699 dev_warn(dev, "Send error (rc=%d)\n", rc); 3700 } 3701 3702 return rc; 3703 } 3704 3705 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3706 { 3707 struct device *dev = &adapter->vdev->dev; 3708 union ibmvnic_crq crq; 3709 int retries = 100; 3710 int rc; 3711 3712 memset(&crq, 0, sizeof(crq)); 3713 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3714 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3715 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3716 3717 do { 3718 rc = ibmvnic_send_crq(adapter, &crq); 3719 if (rc != H_CLOSED) 3720 break; 3721 retries--; 3722 msleep(50); 3723 3724 } while (retries > 0); 3725 3726 if (rc) { 3727 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3728 return rc; 3729 } 3730 3731 return 0; 3732 } 3733 3734 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3735 { 3736 union ibmvnic_crq crq; 3737 3738 memset(&crq, 0, sizeof(crq)); 3739 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3740 crq.version_exchange.cmd = VERSION_EXCHANGE; 3741 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3742 3743 return ibmvnic_send_crq(adapter, &crq); 3744 } 3745 3746 struct vnic_login_client_data { 3747 u8 type; 3748 __be16 len; 3749 char name[]; 3750 } __packed; 3751 3752 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3753 { 3754 int len; 3755 3756 /* Calculate the amount of buffer space needed for the 3757 * vnic client data in the login buffer. There are four entries, 3758 * OS name, LPAR name, device name, and a null last entry. 3759 */ 3760 len = 4 * sizeof(struct vnic_login_client_data); 3761 len += 6; /* "Linux" plus NULL */ 3762 len += strlen(utsname()->nodename) + 1; 3763 len += strlen(adapter->netdev->name) + 1; 3764 3765 return len; 3766 } 3767 3768 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3769 struct vnic_login_client_data *vlcd) 3770 { 3771 const char *os_name = "Linux"; 3772 int len; 3773 3774 /* Type 1 - LPAR OS */ 3775 vlcd->type = 1; 3776 len = strlen(os_name) + 1; 3777 vlcd->len = cpu_to_be16(len); 3778 strncpy(vlcd->name, os_name, len); 3779 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3780 3781 /* Type 2 - LPAR name */ 3782 vlcd->type = 2; 3783 len = strlen(utsname()->nodename) + 1; 3784 vlcd->len = cpu_to_be16(len); 3785 strncpy(vlcd->name, utsname()->nodename, len); 3786 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3787 3788 /* Type 3 - device name */ 3789 vlcd->type = 3; 3790 len = strlen(adapter->netdev->name) + 1; 3791 vlcd->len = cpu_to_be16(len); 3792 strncpy(vlcd->name, adapter->netdev->name, len); 3793 } 3794 3795 static int send_login(struct ibmvnic_adapter *adapter) 3796 { 3797 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3798 struct ibmvnic_login_buffer *login_buffer; 3799 struct device *dev = &adapter->vdev->dev; 3800 struct vnic_login_client_data *vlcd; 3801 dma_addr_t rsp_buffer_token; 3802 dma_addr_t buffer_token; 3803 size_t rsp_buffer_size; 3804 union ibmvnic_crq crq; 3805 int client_data_len; 3806 size_t buffer_size; 3807 __be64 *tx_list_p; 3808 __be64 *rx_list_p; 3809 int rc; 3810 int i; 3811 3812 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3813 netdev_err(adapter->netdev, 3814 "RX or TX queues are not allocated, device login failed\n"); 3815 return -1; 3816 } 3817 3818 release_login_buffer(adapter); 3819 release_login_rsp_buffer(adapter); 3820 3821 client_data_len = vnic_client_data_len(adapter); 3822 3823 buffer_size = 3824 sizeof(struct ibmvnic_login_buffer) + 3825 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3826 client_data_len; 3827 3828 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3829 if (!login_buffer) 3830 goto buf_alloc_failed; 3831 3832 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3833 DMA_TO_DEVICE); 3834 if (dma_mapping_error(dev, buffer_token)) { 3835 dev_err(dev, "Couldn't map login buffer\n"); 3836 goto buf_map_failed; 3837 } 3838 3839 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3840 sizeof(u64) * adapter->req_tx_queues + 3841 sizeof(u64) * adapter->req_rx_queues + 3842 sizeof(u64) * adapter->req_rx_queues + 3843 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3844 3845 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3846 if (!login_rsp_buffer) 3847 goto buf_rsp_alloc_failed; 3848 3849 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3850 rsp_buffer_size, DMA_FROM_DEVICE); 3851 if (dma_mapping_error(dev, rsp_buffer_token)) { 3852 dev_err(dev, "Couldn't map login rsp buffer\n"); 3853 goto buf_rsp_map_failed; 3854 } 3855 3856 adapter->login_buf = login_buffer; 3857 adapter->login_buf_token = buffer_token; 3858 adapter->login_buf_sz = buffer_size; 3859 adapter->login_rsp_buf = login_rsp_buffer; 3860 adapter->login_rsp_buf_token = rsp_buffer_token; 3861 adapter->login_rsp_buf_sz = rsp_buffer_size; 3862 3863 login_buffer->len = cpu_to_be32(buffer_size); 3864 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3865 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3866 login_buffer->off_txcomp_subcrqs = 3867 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3868 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3869 login_buffer->off_rxcomp_subcrqs = 3870 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3871 sizeof(u64) * adapter->req_tx_queues); 3872 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3873 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3874 3875 tx_list_p = (__be64 *)((char *)login_buffer + 3876 sizeof(struct ibmvnic_login_buffer)); 3877 rx_list_p = (__be64 *)((char *)login_buffer + 3878 sizeof(struct ibmvnic_login_buffer) + 3879 sizeof(u64) * adapter->req_tx_queues); 3880 3881 for (i = 0; i < adapter->req_tx_queues; i++) { 3882 if (adapter->tx_scrq[i]) { 3883 tx_list_p[i] = 3884 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 3885 } 3886 } 3887 3888 for (i = 0; i < adapter->req_rx_queues; i++) { 3889 if (adapter->rx_scrq[i]) { 3890 rx_list_p[i] = 3891 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 3892 } 3893 } 3894 3895 /* Insert vNIC login client data */ 3896 vlcd = (struct vnic_login_client_data *) 3897 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3898 login_buffer->client_data_offset = 3899 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3900 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3901 3902 vnic_add_client_data(adapter, vlcd); 3903 3904 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3905 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3906 netdev_dbg(adapter->netdev, "%016lx\n", 3907 ((unsigned long *)(adapter->login_buf))[i]); 3908 } 3909 3910 memset(&crq, 0, sizeof(crq)); 3911 crq.login.first = IBMVNIC_CRQ_CMD; 3912 crq.login.cmd = LOGIN; 3913 crq.login.ioba = cpu_to_be32(buffer_token); 3914 crq.login.len = cpu_to_be32(buffer_size); 3915 3916 adapter->login_pending = true; 3917 rc = ibmvnic_send_crq(adapter, &crq); 3918 if (rc) { 3919 adapter->login_pending = false; 3920 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 3921 goto buf_rsp_map_failed; 3922 } 3923 3924 return 0; 3925 3926 buf_rsp_map_failed: 3927 kfree(login_rsp_buffer); 3928 adapter->login_rsp_buf = NULL; 3929 buf_rsp_alloc_failed: 3930 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3931 buf_map_failed: 3932 kfree(login_buffer); 3933 adapter->login_buf = NULL; 3934 buf_alloc_failed: 3935 return -1; 3936 } 3937 3938 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3939 u32 len, u8 map_id) 3940 { 3941 union ibmvnic_crq crq; 3942 3943 memset(&crq, 0, sizeof(crq)); 3944 crq.request_map.first = IBMVNIC_CRQ_CMD; 3945 crq.request_map.cmd = REQUEST_MAP; 3946 crq.request_map.map_id = map_id; 3947 crq.request_map.ioba = cpu_to_be32(addr); 3948 crq.request_map.len = cpu_to_be32(len); 3949 return ibmvnic_send_crq(adapter, &crq); 3950 } 3951 3952 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3953 { 3954 union ibmvnic_crq crq; 3955 3956 memset(&crq, 0, sizeof(crq)); 3957 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3958 crq.request_unmap.cmd = REQUEST_UNMAP; 3959 crq.request_unmap.map_id = map_id; 3960 return ibmvnic_send_crq(adapter, &crq); 3961 } 3962 3963 static void send_query_map(struct ibmvnic_adapter *adapter) 3964 { 3965 union ibmvnic_crq crq; 3966 3967 memset(&crq, 0, sizeof(crq)); 3968 crq.query_map.first = IBMVNIC_CRQ_CMD; 3969 crq.query_map.cmd = QUERY_MAP; 3970 ibmvnic_send_crq(adapter, &crq); 3971 } 3972 3973 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3974 static void send_query_cap(struct ibmvnic_adapter *adapter) 3975 { 3976 union ibmvnic_crq crq; 3977 3978 atomic_set(&adapter->running_cap_crqs, 0); 3979 memset(&crq, 0, sizeof(crq)); 3980 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3981 crq.query_capability.cmd = QUERY_CAPABILITY; 3982 3983 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3984 atomic_inc(&adapter->running_cap_crqs); 3985 ibmvnic_send_crq(adapter, &crq); 3986 3987 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3988 atomic_inc(&adapter->running_cap_crqs); 3989 ibmvnic_send_crq(adapter, &crq); 3990 3991 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3992 atomic_inc(&adapter->running_cap_crqs); 3993 ibmvnic_send_crq(adapter, &crq); 3994 3995 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3996 atomic_inc(&adapter->running_cap_crqs); 3997 ibmvnic_send_crq(adapter, &crq); 3998 3999 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4000 atomic_inc(&adapter->running_cap_crqs); 4001 ibmvnic_send_crq(adapter, &crq); 4002 4003 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4004 atomic_inc(&adapter->running_cap_crqs); 4005 ibmvnic_send_crq(adapter, &crq); 4006 4007 crq.query_capability.capability = 4008 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4009 atomic_inc(&adapter->running_cap_crqs); 4010 ibmvnic_send_crq(adapter, &crq); 4011 4012 crq.query_capability.capability = 4013 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4014 atomic_inc(&adapter->running_cap_crqs); 4015 ibmvnic_send_crq(adapter, &crq); 4016 4017 crq.query_capability.capability = 4018 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4019 atomic_inc(&adapter->running_cap_crqs); 4020 ibmvnic_send_crq(adapter, &crq); 4021 4022 crq.query_capability.capability = 4023 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4024 atomic_inc(&adapter->running_cap_crqs); 4025 ibmvnic_send_crq(adapter, &crq); 4026 4027 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4028 atomic_inc(&adapter->running_cap_crqs); 4029 ibmvnic_send_crq(adapter, &crq); 4030 4031 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4032 atomic_inc(&adapter->running_cap_crqs); 4033 ibmvnic_send_crq(adapter, &crq); 4034 4035 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4036 atomic_inc(&adapter->running_cap_crqs); 4037 ibmvnic_send_crq(adapter, &crq); 4038 4039 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4040 atomic_inc(&adapter->running_cap_crqs); 4041 ibmvnic_send_crq(adapter, &crq); 4042 4043 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4044 atomic_inc(&adapter->running_cap_crqs); 4045 ibmvnic_send_crq(adapter, &crq); 4046 4047 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4048 atomic_inc(&adapter->running_cap_crqs); 4049 ibmvnic_send_crq(adapter, &crq); 4050 4051 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4052 atomic_inc(&adapter->running_cap_crqs); 4053 ibmvnic_send_crq(adapter, &crq); 4054 4055 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4056 atomic_inc(&adapter->running_cap_crqs); 4057 ibmvnic_send_crq(adapter, &crq); 4058 4059 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4060 atomic_inc(&adapter->running_cap_crqs); 4061 ibmvnic_send_crq(adapter, &crq); 4062 4063 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4064 atomic_inc(&adapter->running_cap_crqs); 4065 ibmvnic_send_crq(adapter, &crq); 4066 4067 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4068 atomic_inc(&adapter->running_cap_crqs); 4069 ibmvnic_send_crq(adapter, &crq); 4070 4071 crq.query_capability.capability = 4072 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4073 atomic_inc(&adapter->running_cap_crqs); 4074 ibmvnic_send_crq(adapter, &crq); 4075 4076 crq.query_capability.capability = 4077 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4078 atomic_inc(&adapter->running_cap_crqs); 4079 ibmvnic_send_crq(adapter, &crq); 4080 4081 crq.query_capability.capability = 4082 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4083 atomic_inc(&adapter->running_cap_crqs); 4084 ibmvnic_send_crq(adapter, &crq); 4085 4086 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4087 atomic_inc(&adapter->running_cap_crqs); 4088 ibmvnic_send_crq(adapter, &crq); 4089 } 4090 4091 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4092 { 4093 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4094 struct device *dev = &adapter->vdev->dev; 4095 union ibmvnic_crq crq; 4096 4097 adapter->ip_offload_tok = 4098 dma_map_single(dev, 4099 &adapter->ip_offload_buf, 4100 buf_sz, 4101 DMA_FROM_DEVICE); 4102 4103 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4104 if (!firmware_has_feature(FW_FEATURE_CMO)) 4105 dev_err(dev, "Couldn't map offload buffer\n"); 4106 return; 4107 } 4108 4109 memset(&crq, 0, sizeof(crq)); 4110 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4111 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4112 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4113 crq.query_ip_offload.ioba = 4114 cpu_to_be32(adapter->ip_offload_tok); 4115 4116 ibmvnic_send_crq(adapter, &crq); 4117 } 4118 4119 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4120 { 4121 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4122 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4123 struct device *dev = &adapter->vdev->dev; 4124 netdev_features_t old_hw_features = 0; 4125 union ibmvnic_crq crq; 4126 4127 adapter->ip_offload_ctrl_tok = 4128 dma_map_single(dev, 4129 ctrl_buf, 4130 sizeof(adapter->ip_offload_ctrl), 4131 DMA_TO_DEVICE); 4132 4133 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4134 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4135 return; 4136 } 4137 4138 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4139 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4140 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4141 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4142 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4143 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4144 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4145 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4146 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4147 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4148 4149 /* large_rx disabled for now, additional features needed */ 4150 ctrl_buf->large_rx_ipv4 = 0; 4151 ctrl_buf->large_rx_ipv6 = 0; 4152 4153 if (adapter->state != VNIC_PROBING) { 4154 old_hw_features = adapter->netdev->hw_features; 4155 adapter->netdev->hw_features = 0; 4156 } 4157 4158 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4159 4160 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4161 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4162 4163 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4164 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4165 4166 if ((adapter->netdev->features & 4167 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4168 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4169 4170 if (buf->large_tx_ipv4) 4171 adapter->netdev->hw_features |= NETIF_F_TSO; 4172 if (buf->large_tx_ipv6) 4173 adapter->netdev->hw_features |= NETIF_F_TSO6; 4174 4175 if (adapter->state == VNIC_PROBING) { 4176 adapter->netdev->features |= adapter->netdev->hw_features; 4177 } else if (old_hw_features != adapter->netdev->hw_features) { 4178 netdev_features_t tmp = 0; 4179 4180 /* disable features no longer supported */ 4181 adapter->netdev->features &= adapter->netdev->hw_features; 4182 /* turn on features now supported if previously enabled */ 4183 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4184 adapter->netdev->hw_features; 4185 adapter->netdev->features |= 4186 tmp & adapter->netdev->wanted_features; 4187 } 4188 4189 memset(&crq, 0, sizeof(crq)); 4190 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4191 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4192 crq.control_ip_offload.len = 4193 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4194 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4195 ibmvnic_send_crq(adapter, &crq); 4196 } 4197 4198 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4199 struct ibmvnic_adapter *adapter) 4200 { 4201 struct device *dev = &adapter->vdev->dev; 4202 4203 if (crq->get_vpd_size_rsp.rc.code) { 4204 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4205 crq->get_vpd_size_rsp.rc.code); 4206 complete(&adapter->fw_done); 4207 return; 4208 } 4209 4210 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4211 complete(&adapter->fw_done); 4212 } 4213 4214 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4215 struct ibmvnic_adapter *adapter) 4216 { 4217 struct device *dev = &adapter->vdev->dev; 4218 unsigned char *substr = NULL; 4219 u8 fw_level_len = 0; 4220 4221 memset(adapter->fw_version, 0, 32); 4222 4223 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4224 DMA_FROM_DEVICE); 4225 4226 if (crq->get_vpd_rsp.rc.code) { 4227 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4228 crq->get_vpd_rsp.rc.code); 4229 goto complete; 4230 } 4231 4232 /* get the position of the firmware version info 4233 * located after the ASCII 'RM' substring in the buffer 4234 */ 4235 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4236 if (!substr) { 4237 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4238 goto complete; 4239 } 4240 4241 /* get length of firmware level ASCII substring */ 4242 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4243 fw_level_len = *(substr + 2); 4244 } else { 4245 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4246 goto complete; 4247 } 4248 4249 /* copy firmware version string from vpd into adapter */ 4250 if ((substr + 3 + fw_level_len) < 4251 (adapter->vpd->buff + adapter->vpd->len)) { 4252 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4253 } else { 4254 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4255 } 4256 4257 complete: 4258 if (adapter->fw_version[0] == '\0') 4259 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4260 complete(&adapter->fw_done); 4261 } 4262 4263 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4264 { 4265 struct device *dev = &adapter->vdev->dev; 4266 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4267 int i; 4268 4269 dma_unmap_single(dev, adapter->ip_offload_tok, 4270 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4271 4272 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4273 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4274 netdev_dbg(adapter->netdev, "%016lx\n", 4275 ((unsigned long *)(buf))[i]); 4276 4277 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4278 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4279 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4280 buf->tcp_ipv4_chksum); 4281 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4282 buf->tcp_ipv6_chksum); 4283 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4284 buf->udp_ipv4_chksum); 4285 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4286 buf->udp_ipv6_chksum); 4287 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4288 buf->large_tx_ipv4); 4289 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4290 buf->large_tx_ipv6); 4291 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4292 buf->large_rx_ipv4); 4293 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4294 buf->large_rx_ipv6); 4295 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4296 buf->max_ipv4_header_size); 4297 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4298 buf->max_ipv6_header_size); 4299 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4300 buf->max_tcp_header_size); 4301 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4302 buf->max_udp_header_size); 4303 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4304 buf->max_large_tx_size); 4305 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4306 buf->max_large_rx_size); 4307 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4308 buf->ipv6_extension_header); 4309 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4310 buf->tcp_pseudosum_req); 4311 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4312 buf->num_ipv6_ext_headers); 4313 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4314 buf->off_ipv6_ext_headers); 4315 4316 send_control_ip_offload(adapter); 4317 } 4318 4319 static const char *ibmvnic_fw_err_cause(u16 cause) 4320 { 4321 switch (cause) { 4322 case ADAPTER_PROBLEM: 4323 return "adapter problem"; 4324 case BUS_PROBLEM: 4325 return "bus problem"; 4326 case FW_PROBLEM: 4327 return "firmware problem"; 4328 case DD_PROBLEM: 4329 return "device driver problem"; 4330 case EEH_RECOVERY: 4331 return "EEH recovery"; 4332 case FW_UPDATED: 4333 return "firmware updated"; 4334 case LOW_MEMORY: 4335 return "low Memory"; 4336 default: 4337 return "unknown"; 4338 } 4339 } 4340 4341 static void handle_error_indication(union ibmvnic_crq *crq, 4342 struct ibmvnic_adapter *adapter) 4343 { 4344 struct device *dev = &adapter->vdev->dev; 4345 u16 cause; 4346 4347 cause = be16_to_cpu(crq->error_indication.error_cause); 4348 4349 dev_warn_ratelimited(dev, 4350 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4351 crq->error_indication.flags 4352 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4353 ibmvnic_fw_err_cause(cause)); 4354 4355 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4356 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4357 else 4358 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4359 } 4360 4361 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4362 struct ibmvnic_adapter *adapter) 4363 { 4364 struct net_device *netdev = adapter->netdev; 4365 struct device *dev = &adapter->vdev->dev; 4366 long rc; 4367 4368 rc = crq->change_mac_addr_rsp.rc.code; 4369 if (rc) { 4370 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4371 goto out; 4372 } 4373 /* crq->change_mac_addr.mac_addr is the requested one 4374 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4375 */ 4376 ether_addr_copy(netdev->dev_addr, 4377 &crq->change_mac_addr_rsp.mac_addr[0]); 4378 ether_addr_copy(adapter->mac_addr, 4379 &crq->change_mac_addr_rsp.mac_addr[0]); 4380 out: 4381 complete(&adapter->fw_done); 4382 return rc; 4383 } 4384 4385 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4386 struct ibmvnic_adapter *adapter) 4387 { 4388 struct device *dev = &adapter->vdev->dev; 4389 u64 *req_value; 4390 char *name; 4391 4392 atomic_dec(&adapter->running_cap_crqs); 4393 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4394 case REQ_TX_QUEUES: 4395 req_value = &adapter->req_tx_queues; 4396 name = "tx"; 4397 break; 4398 case REQ_RX_QUEUES: 4399 req_value = &adapter->req_rx_queues; 4400 name = "rx"; 4401 break; 4402 case REQ_RX_ADD_QUEUES: 4403 req_value = &adapter->req_rx_add_queues; 4404 name = "rx_add"; 4405 break; 4406 case REQ_TX_ENTRIES_PER_SUBCRQ: 4407 req_value = &adapter->req_tx_entries_per_subcrq; 4408 name = "tx_entries_per_subcrq"; 4409 break; 4410 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4411 req_value = &adapter->req_rx_add_entries_per_subcrq; 4412 name = "rx_add_entries_per_subcrq"; 4413 break; 4414 case REQ_MTU: 4415 req_value = &adapter->req_mtu; 4416 name = "mtu"; 4417 break; 4418 case PROMISC_REQUESTED: 4419 req_value = &adapter->promisc; 4420 name = "promisc"; 4421 break; 4422 default: 4423 dev_err(dev, "Got invalid cap request rsp %d\n", 4424 crq->request_capability.capability); 4425 return; 4426 } 4427 4428 switch (crq->request_capability_rsp.rc.code) { 4429 case SUCCESS: 4430 break; 4431 case PARTIALSUCCESS: 4432 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4433 *req_value, 4434 (long)be64_to_cpu(crq->request_capability_rsp.number), 4435 name); 4436 4437 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4438 REQ_MTU) { 4439 pr_err("mtu of %llu is not supported. Reverting.\n", 4440 *req_value); 4441 *req_value = adapter->fallback.mtu; 4442 } else { 4443 *req_value = 4444 be64_to_cpu(crq->request_capability_rsp.number); 4445 } 4446 4447 send_request_cap(adapter, 1); 4448 return; 4449 default: 4450 dev_err(dev, "Error %d in request cap rsp\n", 4451 crq->request_capability_rsp.rc.code); 4452 return; 4453 } 4454 4455 /* Done receiving requested capabilities, query IP offload support */ 4456 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4457 adapter->wait_capability = false; 4458 send_query_ip_offload(adapter); 4459 } 4460 } 4461 4462 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4463 struct ibmvnic_adapter *adapter) 4464 { 4465 struct device *dev = &adapter->vdev->dev; 4466 struct net_device *netdev = adapter->netdev; 4467 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4468 struct ibmvnic_login_buffer *login = adapter->login_buf; 4469 u64 *tx_handle_array; 4470 u64 *rx_handle_array; 4471 int num_tx_pools; 4472 int num_rx_pools; 4473 u64 *size_array; 4474 int i; 4475 4476 /* CHECK: Test/set of login_pending does not need to be atomic 4477 * because only ibmvnic_tasklet tests/clears this. 4478 */ 4479 if (!adapter->login_pending) { 4480 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4481 return 0; 4482 } 4483 adapter->login_pending = false; 4484 4485 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4486 DMA_TO_DEVICE); 4487 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4488 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4489 4490 /* If the number of queues requested can't be allocated by the 4491 * server, the login response will return with code 1. We will need 4492 * to resend the login buffer with fewer queues requested. 4493 */ 4494 if (login_rsp_crq->generic.rc.code) { 4495 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4496 complete(&adapter->init_done); 4497 return 0; 4498 } 4499 4500 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4501 4502 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4503 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4504 netdev_dbg(adapter->netdev, "%016lx\n", 4505 ((unsigned long *)(adapter->login_rsp_buf))[i]); 4506 } 4507 4508 /* Sanity checks */ 4509 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4510 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4511 adapter->req_rx_add_queues != 4512 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4513 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4514 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4515 return -EIO; 4516 } 4517 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4518 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4519 /* variable buffer sizes are not supported, so just read the 4520 * first entry. 4521 */ 4522 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4523 4524 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4525 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4526 4527 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4528 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4529 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4530 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4531 4532 for (i = 0; i < num_tx_pools; i++) 4533 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4534 4535 for (i = 0; i < num_rx_pools; i++) 4536 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4537 4538 adapter->num_active_tx_scrqs = num_tx_pools; 4539 adapter->num_active_rx_scrqs = num_rx_pools; 4540 release_login_rsp_buffer(adapter); 4541 release_login_buffer(adapter); 4542 complete(&adapter->init_done); 4543 4544 return 0; 4545 } 4546 4547 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4548 struct ibmvnic_adapter *adapter) 4549 { 4550 struct device *dev = &adapter->vdev->dev; 4551 long rc; 4552 4553 rc = crq->request_unmap_rsp.rc.code; 4554 if (rc) 4555 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4556 } 4557 4558 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4559 struct ibmvnic_adapter *adapter) 4560 { 4561 struct net_device *netdev = adapter->netdev; 4562 struct device *dev = &adapter->vdev->dev; 4563 long rc; 4564 4565 rc = crq->query_map_rsp.rc.code; 4566 if (rc) { 4567 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4568 return; 4569 } 4570 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4571 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4572 crq->query_map_rsp.free_pages); 4573 } 4574 4575 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4576 struct ibmvnic_adapter *adapter) 4577 { 4578 struct net_device *netdev = adapter->netdev; 4579 struct device *dev = &adapter->vdev->dev; 4580 long rc; 4581 4582 atomic_dec(&adapter->running_cap_crqs); 4583 netdev_dbg(netdev, "Outstanding queries: %d\n", 4584 atomic_read(&adapter->running_cap_crqs)); 4585 rc = crq->query_capability.rc.code; 4586 if (rc) { 4587 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4588 goto out; 4589 } 4590 4591 switch (be16_to_cpu(crq->query_capability.capability)) { 4592 case MIN_TX_QUEUES: 4593 adapter->min_tx_queues = 4594 be64_to_cpu(crq->query_capability.number); 4595 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4596 adapter->min_tx_queues); 4597 break; 4598 case MIN_RX_QUEUES: 4599 adapter->min_rx_queues = 4600 be64_to_cpu(crq->query_capability.number); 4601 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4602 adapter->min_rx_queues); 4603 break; 4604 case MIN_RX_ADD_QUEUES: 4605 adapter->min_rx_add_queues = 4606 be64_to_cpu(crq->query_capability.number); 4607 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4608 adapter->min_rx_add_queues); 4609 break; 4610 case MAX_TX_QUEUES: 4611 adapter->max_tx_queues = 4612 be64_to_cpu(crq->query_capability.number); 4613 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4614 adapter->max_tx_queues); 4615 break; 4616 case MAX_RX_QUEUES: 4617 adapter->max_rx_queues = 4618 be64_to_cpu(crq->query_capability.number); 4619 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4620 adapter->max_rx_queues); 4621 break; 4622 case MAX_RX_ADD_QUEUES: 4623 adapter->max_rx_add_queues = 4624 be64_to_cpu(crq->query_capability.number); 4625 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4626 adapter->max_rx_add_queues); 4627 break; 4628 case MIN_TX_ENTRIES_PER_SUBCRQ: 4629 adapter->min_tx_entries_per_subcrq = 4630 be64_to_cpu(crq->query_capability.number); 4631 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4632 adapter->min_tx_entries_per_subcrq); 4633 break; 4634 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4635 adapter->min_rx_add_entries_per_subcrq = 4636 be64_to_cpu(crq->query_capability.number); 4637 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4638 adapter->min_rx_add_entries_per_subcrq); 4639 break; 4640 case MAX_TX_ENTRIES_PER_SUBCRQ: 4641 adapter->max_tx_entries_per_subcrq = 4642 be64_to_cpu(crq->query_capability.number); 4643 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4644 adapter->max_tx_entries_per_subcrq); 4645 break; 4646 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4647 adapter->max_rx_add_entries_per_subcrq = 4648 be64_to_cpu(crq->query_capability.number); 4649 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4650 adapter->max_rx_add_entries_per_subcrq); 4651 break; 4652 case TCP_IP_OFFLOAD: 4653 adapter->tcp_ip_offload = 4654 be64_to_cpu(crq->query_capability.number); 4655 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4656 adapter->tcp_ip_offload); 4657 break; 4658 case PROMISC_SUPPORTED: 4659 adapter->promisc_supported = 4660 be64_to_cpu(crq->query_capability.number); 4661 netdev_dbg(netdev, "promisc_supported = %lld\n", 4662 adapter->promisc_supported); 4663 break; 4664 case MIN_MTU: 4665 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4666 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4667 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4668 break; 4669 case MAX_MTU: 4670 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4671 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4672 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4673 break; 4674 case MAX_MULTICAST_FILTERS: 4675 adapter->max_multicast_filters = 4676 be64_to_cpu(crq->query_capability.number); 4677 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4678 adapter->max_multicast_filters); 4679 break; 4680 case VLAN_HEADER_INSERTION: 4681 adapter->vlan_header_insertion = 4682 be64_to_cpu(crq->query_capability.number); 4683 if (adapter->vlan_header_insertion) 4684 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4685 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4686 adapter->vlan_header_insertion); 4687 break; 4688 case RX_VLAN_HEADER_INSERTION: 4689 adapter->rx_vlan_header_insertion = 4690 be64_to_cpu(crq->query_capability.number); 4691 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4692 adapter->rx_vlan_header_insertion); 4693 break; 4694 case MAX_TX_SG_ENTRIES: 4695 adapter->max_tx_sg_entries = 4696 be64_to_cpu(crq->query_capability.number); 4697 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4698 adapter->max_tx_sg_entries); 4699 break; 4700 case RX_SG_SUPPORTED: 4701 adapter->rx_sg_supported = 4702 be64_to_cpu(crq->query_capability.number); 4703 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4704 adapter->rx_sg_supported); 4705 break; 4706 case OPT_TX_COMP_SUB_QUEUES: 4707 adapter->opt_tx_comp_sub_queues = 4708 be64_to_cpu(crq->query_capability.number); 4709 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4710 adapter->opt_tx_comp_sub_queues); 4711 break; 4712 case OPT_RX_COMP_QUEUES: 4713 adapter->opt_rx_comp_queues = 4714 be64_to_cpu(crq->query_capability.number); 4715 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4716 adapter->opt_rx_comp_queues); 4717 break; 4718 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4719 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4720 be64_to_cpu(crq->query_capability.number); 4721 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4722 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4723 break; 4724 case OPT_TX_ENTRIES_PER_SUBCRQ: 4725 adapter->opt_tx_entries_per_subcrq = 4726 be64_to_cpu(crq->query_capability.number); 4727 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4728 adapter->opt_tx_entries_per_subcrq); 4729 break; 4730 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4731 adapter->opt_rxba_entries_per_subcrq = 4732 be64_to_cpu(crq->query_capability.number); 4733 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4734 adapter->opt_rxba_entries_per_subcrq); 4735 break; 4736 case TX_RX_DESC_REQ: 4737 adapter->tx_rx_desc_req = crq->query_capability.number; 4738 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4739 adapter->tx_rx_desc_req); 4740 break; 4741 4742 default: 4743 netdev_err(netdev, "Got invalid cap rsp %d\n", 4744 crq->query_capability.capability); 4745 } 4746 4747 out: 4748 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4749 adapter->wait_capability = false; 4750 send_request_cap(adapter, 0); 4751 } 4752 } 4753 4754 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4755 { 4756 union ibmvnic_crq crq; 4757 int rc; 4758 4759 memset(&crq, 0, sizeof(crq)); 4760 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4761 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4762 4763 mutex_lock(&adapter->fw_lock); 4764 adapter->fw_done_rc = 0; 4765 reinit_completion(&adapter->fw_done); 4766 4767 rc = ibmvnic_send_crq(adapter, &crq); 4768 if (rc) { 4769 mutex_unlock(&adapter->fw_lock); 4770 return rc; 4771 } 4772 4773 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4774 if (rc) { 4775 mutex_unlock(&adapter->fw_lock); 4776 return rc; 4777 } 4778 4779 mutex_unlock(&adapter->fw_lock); 4780 return adapter->fw_done_rc ? -EIO : 0; 4781 } 4782 4783 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4784 struct ibmvnic_adapter *adapter) 4785 { 4786 struct net_device *netdev = adapter->netdev; 4787 int rc; 4788 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4789 4790 rc = crq->query_phys_parms_rsp.rc.code; 4791 if (rc) { 4792 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4793 return rc; 4794 } 4795 switch (rspeed) { 4796 case IBMVNIC_10MBPS: 4797 adapter->speed = SPEED_10; 4798 break; 4799 case IBMVNIC_100MBPS: 4800 adapter->speed = SPEED_100; 4801 break; 4802 case IBMVNIC_1GBPS: 4803 adapter->speed = SPEED_1000; 4804 break; 4805 case IBMVNIC_10GBPS: 4806 adapter->speed = SPEED_10000; 4807 break; 4808 case IBMVNIC_25GBPS: 4809 adapter->speed = SPEED_25000; 4810 break; 4811 case IBMVNIC_40GBPS: 4812 adapter->speed = SPEED_40000; 4813 break; 4814 case IBMVNIC_50GBPS: 4815 adapter->speed = SPEED_50000; 4816 break; 4817 case IBMVNIC_100GBPS: 4818 adapter->speed = SPEED_100000; 4819 break; 4820 case IBMVNIC_200GBPS: 4821 adapter->speed = SPEED_200000; 4822 break; 4823 default: 4824 if (netif_carrier_ok(netdev)) 4825 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4826 adapter->speed = SPEED_UNKNOWN; 4827 } 4828 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4829 adapter->duplex = DUPLEX_FULL; 4830 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4831 adapter->duplex = DUPLEX_HALF; 4832 else 4833 adapter->duplex = DUPLEX_UNKNOWN; 4834 4835 return rc; 4836 } 4837 4838 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4839 struct ibmvnic_adapter *adapter) 4840 { 4841 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4842 struct net_device *netdev = adapter->netdev; 4843 struct device *dev = &adapter->vdev->dev; 4844 u64 *u64_crq = (u64 *)crq; 4845 long rc; 4846 4847 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4848 (unsigned long)cpu_to_be64(u64_crq[0]), 4849 (unsigned long)cpu_to_be64(u64_crq[1])); 4850 switch (gen_crq->first) { 4851 case IBMVNIC_CRQ_INIT_RSP: 4852 switch (gen_crq->cmd) { 4853 case IBMVNIC_CRQ_INIT: 4854 dev_info(dev, "Partner initialized\n"); 4855 adapter->from_passive_init = true; 4856 /* Discard any stale login responses from prev reset. 4857 * CHECK: should we clear even on INIT_COMPLETE? 4858 */ 4859 adapter->login_pending = false; 4860 4861 if (!completion_done(&adapter->init_done)) { 4862 complete(&adapter->init_done); 4863 adapter->init_done_rc = -EIO; 4864 } 4865 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4866 if (rc && rc != -EBUSY) { 4867 /* We were unable to schedule the failover 4868 * reset either because the adapter was still 4869 * probing (eg: during kexec) or we could not 4870 * allocate memory. Clear the failover_pending 4871 * flag since no one else will. We ignore 4872 * EBUSY because it means either FAILOVER reset 4873 * is already scheduled or the adapter is 4874 * being removed. 4875 */ 4876 netdev_err(netdev, 4877 "Error %ld scheduling failover reset\n", 4878 rc); 4879 adapter->failover_pending = false; 4880 } 4881 break; 4882 case IBMVNIC_CRQ_INIT_COMPLETE: 4883 dev_info(dev, "Partner initialization complete\n"); 4884 adapter->crq.active = true; 4885 send_version_xchg(adapter); 4886 break; 4887 default: 4888 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4889 } 4890 return; 4891 case IBMVNIC_CRQ_XPORT_EVENT: 4892 netif_carrier_off(netdev); 4893 adapter->crq.active = false; 4894 /* terminate any thread waiting for a response 4895 * from the device 4896 */ 4897 if (!completion_done(&adapter->fw_done)) { 4898 adapter->fw_done_rc = -EIO; 4899 complete(&adapter->fw_done); 4900 } 4901 if (!completion_done(&adapter->stats_done)) 4902 complete(&adapter->stats_done); 4903 if (test_bit(0, &adapter->resetting)) 4904 adapter->force_reset_recovery = true; 4905 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4906 dev_info(dev, "Migrated, re-enabling adapter\n"); 4907 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4908 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4909 dev_info(dev, "Backing device failover detected\n"); 4910 adapter->failover_pending = true; 4911 } else { 4912 /* The adapter lost the connection */ 4913 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4914 gen_crq->cmd); 4915 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4916 } 4917 return; 4918 case IBMVNIC_CRQ_CMD_RSP: 4919 break; 4920 default: 4921 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4922 gen_crq->first); 4923 return; 4924 } 4925 4926 switch (gen_crq->cmd) { 4927 case VERSION_EXCHANGE_RSP: 4928 rc = crq->version_exchange_rsp.rc.code; 4929 if (rc) { 4930 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4931 break; 4932 } 4933 ibmvnic_version = 4934 be16_to_cpu(crq->version_exchange_rsp.version); 4935 dev_info(dev, "Partner protocol version is %d\n", 4936 ibmvnic_version); 4937 send_query_cap(adapter); 4938 break; 4939 case QUERY_CAPABILITY_RSP: 4940 handle_query_cap_rsp(crq, adapter); 4941 break; 4942 case QUERY_MAP_RSP: 4943 handle_query_map_rsp(crq, adapter); 4944 break; 4945 case REQUEST_MAP_RSP: 4946 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4947 complete(&adapter->fw_done); 4948 break; 4949 case REQUEST_UNMAP_RSP: 4950 handle_request_unmap_rsp(crq, adapter); 4951 break; 4952 case REQUEST_CAPABILITY_RSP: 4953 handle_request_cap_rsp(crq, adapter); 4954 break; 4955 case LOGIN_RSP: 4956 netdev_dbg(netdev, "Got Login Response\n"); 4957 handle_login_rsp(crq, adapter); 4958 break; 4959 case LOGICAL_LINK_STATE_RSP: 4960 netdev_dbg(netdev, 4961 "Got Logical Link State Response, state: %d rc: %d\n", 4962 crq->logical_link_state_rsp.link_state, 4963 crq->logical_link_state_rsp.rc.code); 4964 adapter->logical_link_state = 4965 crq->logical_link_state_rsp.link_state; 4966 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4967 complete(&adapter->init_done); 4968 break; 4969 case LINK_STATE_INDICATION: 4970 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4971 adapter->phys_link_state = 4972 crq->link_state_indication.phys_link_state; 4973 adapter->logical_link_state = 4974 crq->link_state_indication.logical_link_state; 4975 if (adapter->phys_link_state && adapter->logical_link_state) 4976 netif_carrier_on(netdev); 4977 else 4978 netif_carrier_off(netdev); 4979 break; 4980 case CHANGE_MAC_ADDR_RSP: 4981 netdev_dbg(netdev, "Got MAC address change Response\n"); 4982 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4983 break; 4984 case ERROR_INDICATION: 4985 netdev_dbg(netdev, "Got Error Indication\n"); 4986 handle_error_indication(crq, adapter); 4987 break; 4988 case REQUEST_STATISTICS_RSP: 4989 netdev_dbg(netdev, "Got Statistics Response\n"); 4990 complete(&adapter->stats_done); 4991 break; 4992 case QUERY_IP_OFFLOAD_RSP: 4993 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4994 handle_query_ip_offload_rsp(adapter); 4995 break; 4996 case MULTICAST_CTRL_RSP: 4997 netdev_dbg(netdev, "Got multicast control Response\n"); 4998 break; 4999 case CONTROL_IP_OFFLOAD_RSP: 5000 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5001 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5002 sizeof(adapter->ip_offload_ctrl), 5003 DMA_TO_DEVICE); 5004 complete(&adapter->init_done); 5005 break; 5006 case COLLECT_FW_TRACE_RSP: 5007 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5008 complete(&adapter->fw_done); 5009 break; 5010 case GET_VPD_SIZE_RSP: 5011 handle_vpd_size_rsp(crq, adapter); 5012 break; 5013 case GET_VPD_RSP: 5014 handle_vpd_rsp(crq, adapter); 5015 break; 5016 case QUERY_PHYS_PARMS_RSP: 5017 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5018 complete(&adapter->fw_done); 5019 break; 5020 default: 5021 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5022 gen_crq->cmd); 5023 } 5024 } 5025 5026 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5027 { 5028 struct ibmvnic_adapter *adapter = instance; 5029 5030 tasklet_schedule(&adapter->tasklet); 5031 return IRQ_HANDLED; 5032 } 5033 5034 static void ibmvnic_tasklet(struct tasklet_struct *t) 5035 { 5036 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5037 struct ibmvnic_crq_queue *queue = &adapter->crq; 5038 union ibmvnic_crq *crq; 5039 unsigned long flags; 5040 bool done = false; 5041 5042 spin_lock_irqsave(&queue->lock, flags); 5043 while (!done) { 5044 /* Pull all the valid messages off the CRQ */ 5045 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5046 /* This barrier makes sure ibmvnic_next_crq()'s 5047 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5048 * before ibmvnic_handle_crq()'s 5049 * switch(gen_crq->first) and switch(gen_crq->cmd). 5050 */ 5051 dma_rmb(); 5052 ibmvnic_handle_crq(crq, adapter); 5053 crq->generic.first = 0; 5054 } 5055 5056 /* remain in tasklet until all 5057 * capabilities responses are received 5058 */ 5059 if (!adapter->wait_capability) 5060 done = true; 5061 } 5062 /* if capabilities CRQ's were sent in this tasklet, the following 5063 * tasklet must wait until all responses are received 5064 */ 5065 if (atomic_read(&adapter->running_cap_crqs) != 0) 5066 adapter->wait_capability = true; 5067 spin_unlock_irqrestore(&queue->lock, flags); 5068 } 5069 5070 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5071 { 5072 struct vio_dev *vdev = adapter->vdev; 5073 int rc; 5074 5075 do { 5076 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5077 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5078 5079 if (rc) 5080 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5081 5082 return rc; 5083 } 5084 5085 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5086 { 5087 struct ibmvnic_crq_queue *crq = &adapter->crq; 5088 struct device *dev = &adapter->vdev->dev; 5089 struct vio_dev *vdev = adapter->vdev; 5090 int rc; 5091 5092 /* Close the CRQ */ 5093 do { 5094 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5095 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5096 5097 /* Clean out the queue */ 5098 if (!crq->msgs) 5099 return -EINVAL; 5100 5101 memset(crq->msgs, 0, PAGE_SIZE); 5102 crq->cur = 0; 5103 crq->active = false; 5104 5105 /* And re-open it again */ 5106 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5107 crq->msg_token, PAGE_SIZE); 5108 5109 if (rc == H_CLOSED) 5110 /* Adapter is good, but other end is not ready */ 5111 dev_warn(dev, "Partner adapter not ready\n"); 5112 else if (rc != 0) 5113 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5114 5115 return rc; 5116 } 5117 5118 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5119 { 5120 struct ibmvnic_crq_queue *crq = &adapter->crq; 5121 struct vio_dev *vdev = adapter->vdev; 5122 long rc; 5123 5124 if (!crq->msgs) 5125 return; 5126 5127 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5128 free_irq(vdev->irq, adapter); 5129 tasklet_kill(&adapter->tasklet); 5130 do { 5131 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5132 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5133 5134 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5135 DMA_BIDIRECTIONAL); 5136 free_page((unsigned long)crq->msgs); 5137 crq->msgs = NULL; 5138 crq->active = false; 5139 } 5140 5141 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5142 { 5143 struct ibmvnic_crq_queue *crq = &adapter->crq; 5144 struct device *dev = &adapter->vdev->dev; 5145 struct vio_dev *vdev = adapter->vdev; 5146 int rc, retrc = -ENOMEM; 5147 5148 if (crq->msgs) 5149 return 0; 5150 5151 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5152 /* Should we allocate more than one page? */ 5153 5154 if (!crq->msgs) 5155 return -ENOMEM; 5156 5157 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5158 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5159 DMA_BIDIRECTIONAL); 5160 if (dma_mapping_error(dev, crq->msg_token)) 5161 goto map_failed; 5162 5163 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5164 crq->msg_token, PAGE_SIZE); 5165 5166 if (rc == H_RESOURCE) 5167 /* maybe kexecing and resource is busy. try a reset */ 5168 rc = ibmvnic_reset_crq(adapter); 5169 retrc = rc; 5170 5171 if (rc == H_CLOSED) { 5172 dev_warn(dev, "Partner adapter not ready\n"); 5173 } else if (rc) { 5174 dev_warn(dev, "Error %d opening adapter\n", rc); 5175 goto reg_crq_failed; 5176 } 5177 5178 retrc = 0; 5179 5180 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5181 5182 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5183 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5184 adapter->vdev->unit_address); 5185 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5186 if (rc) { 5187 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5188 vdev->irq, rc); 5189 goto req_irq_failed; 5190 } 5191 5192 rc = vio_enable_interrupts(vdev); 5193 if (rc) { 5194 dev_err(dev, "Error %d enabling interrupts\n", rc); 5195 goto req_irq_failed; 5196 } 5197 5198 crq->cur = 0; 5199 spin_lock_init(&crq->lock); 5200 5201 return retrc; 5202 5203 req_irq_failed: 5204 tasklet_kill(&adapter->tasklet); 5205 do { 5206 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5207 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5208 reg_crq_failed: 5209 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5210 map_failed: 5211 free_page((unsigned long)crq->msgs); 5212 crq->msgs = NULL; 5213 return retrc; 5214 } 5215 5216 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5217 { 5218 struct device *dev = &adapter->vdev->dev; 5219 unsigned long timeout = msecs_to_jiffies(20000); 5220 u64 old_num_rx_queues = adapter->req_rx_queues; 5221 u64 old_num_tx_queues = adapter->req_tx_queues; 5222 int rc; 5223 5224 adapter->from_passive_init = false; 5225 5226 if (reset) 5227 reinit_completion(&adapter->init_done); 5228 5229 adapter->init_done_rc = 0; 5230 rc = ibmvnic_send_crq_init(adapter); 5231 if (rc) { 5232 dev_err(dev, "Send crq init failed with error %d\n", rc); 5233 return rc; 5234 } 5235 5236 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5237 dev_err(dev, "Initialization sequence timed out\n"); 5238 return -1; 5239 } 5240 5241 if (adapter->init_done_rc) { 5242 release_crq_queue(adapter); 5243 return adapter->init_done_rc; 5244 } 5245 5246 if (adapter->from_passive_init) { 5247 adapter->state = VNIC_OPEN; 5248 adapter->from_passive_init = false; 5249 return -1; 5250 } 5251 5252 if (reset && 5253 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5254 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5255 if (adapter->req_rx_queues != old_num_rx_queues || 5256 adapter->req_tx_queues != old_num_tx_queues) { 5257 release_sub_crqs(adapter, 0); 5258 rc = init_sub_crqs(adapter); 5259 } else { 5260 rc = reset_sub_crq_queues(adapter); 5261 } 5262 } else { 5263 rc = init_sub_crqs(adapter); 5264 } 5265 5266 if (rc) { 5267 dev_err(dev, "Initialization of sub crqs failed\n"); 5268 release_crq_queue(adapter); 5269 return rc; 5270 } 5271 5272 rc = init_sub_crq_irqs(adapter); 5273 if (rc) { 5274 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5275 release_crq_queue(adapter); 5276 } 5277 5278 return rc; 5279 } 5280 5281 static struct device_attribute dev_attr_failover; 5282 5283 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5284 { 5285 struct ibmvnic_adapter *adapter; 5286 struct net_device *netdev; 5287 unsigned char *mac_addr_p; 5288 int rc; 5289 5290 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5291 dev->unit_address); 5292 5293 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5294 VETH_MAC_ADDR, NULL); 5295 if (!mac_addr_p) { 5296 dev_err(&dev->dev, 5297 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5298 __FILE__, __LINE__); 5299 return 0; 5300 } 5301 5302 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5303 IBMVNIC_MAX_QUEUES); 5304 if (!netdev) 5305 return -ENOMEM; 5306 5307 adapter = netdev_priv(netdev); 5308 adapter->state = VNIC_PROBING; 5309 dev_set_drvdata(&dev->dev, netdev); 5310 adapter->vdev = dev; 5311 adapter->netdev = netdev; 5312 adapter->login_pending = false; 5313 5314 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5315 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5316 netdev->irq = dev->irq; 5317 netdev->netdev_ops = &ibmvnic_netdev_ops; 5318 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5319 SET_NETDEV_DEV(netdev, &dev->dev); 5320 5321 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5322 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5323 __ibmvnic_delayed_reset); 5324 INIT_LIST_HEAD(&adapter->rwi_list); 5325 spin_lock_init(&adapter->rwi_lock); 5326 spin_lock_init(&adapter->state_lock); 5327 mutex_init(&adapter->fw_lock); 5328 init_completion(&adapter->init_done); 5329 init_completion(&adapter->fw_done); 5330 init_completion(&adapter->reset_done); 5331 init_completion(&adapter->stats_done); 5332 clear_bit(0, &adapter->resetting); 5333 5334 do { 5335 rc = init_crq_queue(adapter); 5336 if (rc) { 5337 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5338 rc); 5339 goto ibmvnic_init_fail; 5340 } 5341 5342 rc = ibmvnic_reset_init(adapter, false); 5343 if (rc && rc != EAGAIN) 5344 goto ibmvnic_init_fail; 5345 } while (rc == EAGAIN); 5346 5347 rc = init_stats_buffers(adapter); 5348 if (rc) 5349 goto ibmvnic_init_fail; 5350 5351 rc = init_stats_token(adapter); 5352 if (rc) 5353 goto ibmvnic_stats_fail; 5354 5355 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5356 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5357 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5358 5359 rc = device_create_file(&dev->dev, &dev_attr_failover); 5360 if (rc) 5361 goto ibmvnic_dev_file_err; 5362 5363 netif_carrier_off(netdev); 5364 rc = register_netdev(netdev); 5365 if (rc) { 5366 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5367 goto ibmvnic_register_fail; 5368 } 5369 dev_info(&dev->dev, "ibmvnic registered\n"); 5370 5371 adapter->state = VNIC_PROBED; 5372 5373 adapter->wait_for_reset = false; 5374 adapter->last_reset_time = jiffies; 5375 return 0; 5376 5377 ibmvnic_register_fail: 5378 device_remove_file(&dev->dev, &dev_attr_failover); 5379 5380 ibmvnic_dev_file_err: 5381 release_stats_token(adapter); 5382 5383 ibmvnic_stats_fail: 5384 release_stats_buffers(adapter); 5385 5386 ibmvnic_init_fail: 5387 release_sub_crqs(adapter, 1); 5388 release_crq_queue(adapter); 5389 mutex_destroy(&adapter->fw_lock); 5390 free_netdev(netdev); 5391 5392 return rc; 5393 } 5394 5395 static void ibmvnic_remove(struct vio_dev *dev) 5396 { 5397 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5398 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5399 unsigned long flags; 5400 5401 spin_lock_irqsave(&adapter->state_lock, flags); 5402 5403 /* If ibmvnic_reset() is scheduling a reset, wait for it to 5404 * finish. Then, set the state to REMOVING to prevent it from 5405 * scheduling any more work and to have reset functions ignore 5406 * any resets that have already been scheduled. Drop the lock 5407 * after setting state, so __ibmvnic_reset() which is called 5408 * from the flush_work() below, can make progress. 5409 */ 5410 spin_lock(&adapter->rwi_lock); 5411 adapter->state = VNIC_REMOVING; 5412 spin_unlock(&adapter->rwi_lock); 5413 5414 spin_unlock_irqrestore(&adapter->state_lock, flags); 5415 5416 flush_work(&adapter->ibmvnic_reset); 5417 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5418 5419 rtnl_lock(); 5420 unregister_netdevice(netdev); 5421 5422 release_resources(adapter); 5423 release_sub_crqs(adapter, 1); 5424 release_crq_queue(adapter); 5425 5426 release_stats_token(adapter); 5427 release_stats_buffers(adapter); 5428 5429 adapter->state = VNIC_REMOVED; 5430 5431 rtnl_unlock(); 5432 mutex_destroy(&adapter->fw_lock); 5433 device_remove_file(&dev->dev, &dev_attr_failover); 5434 free_netdev(netdev); 5435 dev_set_drvdata(&dev->dev, NULL); 5436 } 5437 5438 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5439 const char *buf, size_t count) 5440 { 5441 struct net_device *netdev = dev_get_drvdata(dev); 5442 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5443 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5444 __be64 session_token; 5445 long rc; 5446 5447 if (!sysfs_streq(buf, "1")) 5448 return -EINVAL; 5449 5450 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5451 H_GET_SESSION_TOKEN, 0, 0, 0); 5452 if (rc) { 5453 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5454 rc); 5455 return -EINVAL; 5456 } 5457 5458 session_token = (__be64)retbuf[0]; 5459 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5460 be64_to_cpu(session_token)); 5461 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5462 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5463 if (rc) { 5464 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5465 rc); 5466 return -EINVAL; 5467 } 5468 5469 return count; 5470 } 5471 5472 static DEVICE_ATTR_WO(failover); 5473 5474 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5475 { 5476 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5477 struct ibmvnic_adapter *adapter; 5478 struct iommu_table *tbl; 5479 unsigned long ret = 0; 5480 int i; 5481 5482 tbl = get_iommu_table_base(&vdev->dev); 5483 5484 /* netdev inits at probe time along with the structures we need below*/ 5485 if (!netdev) 5486 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5487 5488 adapter = netdev_priv(netdev); 5489 5490 ret += PAGE_SIZE; /* the crq message queue */ 5491 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5492 5493 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5494 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5495 5496 for (i = 0; i < adapter->num_active_rx_pools; i++) 5497 ret += adapter->rx_pool[i].size * 5498 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5499 5500 return ret; 5501 } 5502 5503 static int ibmvnic_resume(struct device *dev) 5504 { 5505 struct net_device *netdev = dev_get_drvdata(dev); 5506 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5507 5508 if (adapter->state != VNIC_OPEN) 5509 return 0; 5510 5511 tasklet_schedule(&adapter->tasklet); 5512 5513 return 0; 5514 } 5515 5516 static const struct vio_device_id ibmvnic_device_table[] = { 5517 {"network", "IBM,vnic"}, 5518 {"", "" } 5519 }; 5520 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5521 5522 static const struct dev_pm_ops ibmvnic_pm_ops = { 5523 .resume = ibmvnic_resume 5524 }; 5525 5526 static struct vio_driver ibmvnic_driver = { 5527 .id_table = ibmvnic_device_table, 5528 .probe = ibmvnic_probe, 5529 .remove = ibmvnic_remove, 5530 .get_desired_dma = ibmvnic_get_desired_dma, 5531 .name = ibmvnic_driver_name, 5532 .pm = &ibmvnic_pm_ops, 5533 }; 5534 5535 /* module functions */ 5536 static int __init ibmvnic_module_init(void) 5537 { 5538 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5539 IBMVNIC_DRIVER_VERSION); 5540 5541 return vio_register_driver(&ibmvnic_driver); 5542 } 5543 5544 static void __exit ibmvnic_module_exit(void) 5545 { 5546 vio_unregister_driver(&ibmvnic_driver); 5547 } 5548 5549 module_init(ibmvnic_module_init); 5550 module_exit(ibmvnic_module_exit); 5551