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 if (adapter->state != VNIC_PROBED) { 1909 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1910 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1911 } 1912 1913 return rc; 1914 } 1915 1916 /* 1917 * do_reset returns zero if we are able to keep processing reset events, or 1918 * non-zero if we hit a fatal error and must halt. 1919 */ 1920 static int do_reset(struct ibmvnic_adapter *adapter, 1921 struct ibmvnic_rwi *rwi, u32 reset_state) 1922 { 1923 u64 old_num_rx_queues, old_num_tx_queues; 1924 u64 old_num_rx_slots, old_num_tx_slots; 1925 struct net_device *netdev = adapter->netdev; 1926 int i, rc; 1927 1928 netdev_dbg(adapter->netdev, 1929 "[S:%d FOP:%d] Reset reason %d, reset_state %d\n", 1930 adapter->state, adapter->failover_pending, 1931 rwi->reset_reason, reset_state); 1932 1933 adapter->reset_reason = rwi->reset_reason; 1934 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 1935 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 1936 rtnl_lock(); 1937 1938 /* Now that we have the rtnl lock, clear any pending failover. 1939 * This will ensure ibmvnic_open() has either completed or will 1940 * block until failover is complete. 1941 */ 1942 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 1943 adapter->failover_pending = false; 1944 1945 /* read the state and check (again) after getting rtnl */ 1946 reset_state = adapter->state; 1947 1948 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 1949 rc = -EBUSY; 1950 goto out; 1951 } 1952 1953 netif_carrier_off(netdev); 1954 1955 old_num_rx_queues = adapter->req_rx_queues; 1956 old_num_tx_queues = adapter->req_tx_queues; 1957 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1958 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1959 1960 ibmvnic_cleanup(netdev); 1961 1962 if (reset_state == VNIC_OPEN && 1963 adapter->reset_reason != VNIC_RESET_MOBILITY && 1964 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1965 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 1966 rc = __ibmvnic_close(netdev); 1967 if (rc) 1968 goto out; 1969 } else { 1970 adapter->state = VNIC_CLOSING; 1971 1972 /* Release the RTNL lock before link state change and 1973 * re-acquire after the link state change to allow 1974 * linkwatch_event to grab the RTNL lock and run during 1975 * a reset. 1976 */ 1977 rtnl_unlock(); 1978 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1979 rtnl_lock(); 1980 if (rc) 1981 goto out; 1982 1983 if (adapter->state == VNIC_OPEN) { 1984 /* When we dropped rtnl, ibmvnic_open() got 1985 * it and noticed that we are resetting and 1986 * set the adapter state to OPEN. Update our 1987 * new "target" state, and resume the reset 1988 * from VNIC_CLOSING state. 1989 */ 1990 netdev_dbg(netdev, 1991 "Open changed state from %d, updating.\n", 1992 reset_state); 1993 reset_state = VNIC_OPEN; 1994 adapter->state = VNIC_CLOSING; 1995 } 1996 1997 if (adapter->state != VNIC_CLOSING) { 1998 /* If someone else changed the adapter state 1999 * when we dropped the rtnl, fail the reset 2000 */ 2001 rc = -1; 2002 goto out; 2003 } 2004 adapter->state = VNIC_CLOSED; 2005 } 2006 } 2007 2008 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2009 release_resources(adapter); 2010 release_sub_crqs(adapter, 1); 2011 release_crq_queue(adapter); 2012 } 2013 2014 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2015 /* remove the closed state so when we call open it appears 2016 * we are coming from the probed state. 2017 */ 2018 adapter->state = VNIC_PROBED; 2019 2020 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2021 rc = init_crq_queue(adapter); 2022 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2023 rc = ibmvnic_reenable_crq_queue(adapter); 2024 release_sub_crqs(adapter, 1); 2025 } else { 2026 rc = ibmvnic_reset_crq(adapter); 2027 if (rc == H_CLOSED || rc == H_SUCCESS) { 2028 rc = vio_enable_interrupts(adapter->vdev); 2029 if (rc) 2030 netdev_err(adapter->netdev, 2031 "Reset failed to enable interrupts. rc=%d\n", 2032 rc); 2033 } 2034 } 2035 2036 if (rc) { 2037 netdev_err(adapter->netdev, 2038 "Reset couldn't initialize crq. rc=%d\n", rc); 2039 goto out; 2040 } 2041 2042 rc = ibmvnic_reset_init(adapter, true); 2043 if (rc) { 2044 rc = IBMVNIC_INIT_FAILED; 2045 goto out; 2046 } 2047 2048 /* If the adapter was in PROBE state prior to the reset, 2049 * exit here. 2050 */ 2051 if (reset_state == VNIC_PROBED) { 2052 rc = 0; 2053 goto out; 2054 } 2055 2056 rc = ibmvnic_login(netdev); 2057 if (rc) 2058 goto out; 2059 2060 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2061 rc = init_resources(adapter); 2062 if (rc) 2063 goto out; 2064 } else if (adapter->req_rx_queues != old_num_rx_queues || 2065 adapter->req_tx_queues != old_num_tx_queues || 2066 adapter->req_rx_add_entries_per_subcrq != 2067 old_num_rx_slots || 2068 adapter->req_tx_entries_per_subcrq != 2069 old_num_tx_slots || 2070 !adapter->rx_pool || 2071 !adapter->tso_pool || 2072 !adapter->tx_pool) { 2073 release_rx_pools(adapter); 2074 release_tx_pools(adapter); 2075 release_napi(adapter); 2076 release_vpd_data(adapter); 2077 2078 rc = init_resources(adapter); 2079 if (rc) 2080 goto out; 2081 2082 } else { 2083 rc = reset_tx_pools(adapter); 2084 if (rc) { 2085 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2086 rc); 2087 goto out; 2088 } 2089 2090 rc = reset_rx_pools(adapter); 2091 if (rc) { 2092 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2093 rc); 2094 goto out; 2095 } 2096 } 2097 ibmvnic_disable_irqs(adapter); 2098 } 2099 adapter->state = VNIC_CLOSED; 2100 2101 if (reset_state == VNIC_CLOSED) { 2102 rc = 0; 2103 goto out; 2104 } 2105 2106 rc = __ibmvnic_open(netdev); 2107 if (rc) { 2108 rc = IBMVNIC_OPEN_FAILED; 2109 goto out; 2110 } 2111 2112 /* refresh device's multicast list */ 2113 ibmvnic_set_multi(netdev); 2114 2115 /* kick napi */ 2116 for (i = 0; i < adapter->req_rx_queues; i++) 2117 napi_schedule(&adapter->napi[i]); 2118 2119 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2120 adapter->reset_reason == VNIC_RESET_MOBILITY) 2121 __netdev_notify_peers(netdev); 2122 2123 rc = 0; 2124 2125 out: 2126 /* restore the adapter state if reset failed */ 2127 if (rc) 2128 adapter->state = reset_state; 2129 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2130 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2131 rtnl_unlock(); 2132 2133 netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Reset done, rc %d\n", 2134 adapter->state, adapter->failover_pending, rc); 2135 return rc; 2136 } 2137 2138 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2139 struct ibmvnic_rwi *rwi, u32 reset_state) 2140 { 2141 struct net_device *netdev = adapter->netdev; 2142 int rc; 2143 2144 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2145 rwi->reset_reason); 2146 2147 /* read the state and check (again) after getting rtnl */ 2148 reset_state = adapter->state; 2149 2150 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2151 rc = -EBUSY; 2152 goto out; 2153 } 2154 2155 netif_carrier_off(netdev); 2156 adapter->reset_reason = rwi->reset_reason; 2157 2158 ibmvnic_cleanup(netdev); 2159 release_resources(adapter); 2160 release_sub_crqs(adapter, 0); 2161 release_crq_queue(adapter); 2162 2163 /* remove the closed state so when we call open it appears 2164 * we are coming from the probed state. 2165 */ 2166 adapter->state = VNIC_PROBED; 2167 2168 reinit_completion(&adapter->init_done); 2169 rc = init_crq_queue(adapter); 2170 if (rc) { 2171 netdev_err(adapter->netdev, 2172 "Couldn't initialize crq. rc=%d\n", rc); 2173 goto out; 2174 } 2175 2176 rc = ibmvnic_reset_init(adapter, false); 2177 if (rc) 2178 goto out; 2179 2180 /* If the adapter was in PROBE state prior to the reset, 2181 * exit here. 2182 */ 2183 if (reset_state == VNIC_PROBED) 2184 goto out; 2185 2186 rc = ibmvnic_login(netdev); 2187 if (rc) 2188 goto out; 2189 2190 rc = init_resources(adapter); 2191 if (rc) 2192 goto out; 2193 2194 ibmvnic_disable_irqs(adapter); 2195 adapter->state = VNIC_CLOSED; 2196 2197 if (reset_state == VNIC_CLOSED) 2198 goto out; 2199 2200 rc = __ibmvnic_open(netdev); 2201 if (rc) { 2202 rc = IBMVNIC_OPEN_FAILED; 2203 goto out; 2204 } 2205 2206 __netdev_notify_peers(netdev); 2207 out: 2208 /* restore adapter state if reset failed */ 2209 if (rc) 2210 adapter->state = reset_state; 2211 netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Hard reset done, rc %d\n", 2212 adapter->state, adapter->failover_pending, rc); 2213 return rc; 2214 } 2215 2216 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2217 { 2218 struct ibmvnic_rwi *rwi; 2219 unsigned long flags; 2220 2221 spin_lock_irqsave(&adapter->rwi_lock, flags); 2222 2223 if (!list_empty(&adapter->rwi_list)) { 2224 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2225 list); 2226 list_del(&rwi->list); 2227 } else { 2228 rwi = NULL; 2229 } 2230 2231 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2232 return rwi; 2233 } 2234 2235 static void __ibmvnic_reset(struct work_struct *work) 2236 { 2237 struct ibmvnic_rwi *rwi; 2238 struct ibmvnic_adapter *adapter; 2239 bool saved_state = false; 2240 unsigned long flags; 2241 u32 reset_state; 2242 int rc = 0; 2243 2244 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2245 2246 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2247 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2248 IBMVNIC_RESET_DELAY); 2249 return; 2250 } 2251 2252 rwi = get_next_rwi(adapter); 2253 while (rwi) { 2254 spin_lock_irqsave(&adapter->state_lock, flags); 2255 2256 if (adapter->state == VNIC_REMOVING || 2257 adapter->state == VNIC_REMOVED) { 2258 spin_unlock_irqrestore(&adapter->state_lock, flags); 2259 kfree(rwi); 2260 rc = EBUSY; 2261 break; 2262 } 2263 2264 if (!saved_state) { 2265 reset_state = adapter->state; 2266 saved_state = true; 2267 } 2268 spin_unlock_irqrestore(&adapter->state_lock, flags); 2269 2270 if (adapter->force_reset_recovery) { 2271 /* Since we are doing a hard reset now, clear the 2272 * failover_pending flag so we don't ignore any 2273 * future MOBILITY or other resets. 2274 */ 2275 adapter->failover_pending = false; 2276 2277 /* Transport event occurred during previous reset */ 2278 if (adapter->wait_for_reset) { 2279 /* Previous was CHANGE_PARAM; caller locked */ 2280 adapter->force_reset_recovery = false; 2281 rc = do_hard_reset(adapter, rwi, reset_state); 2282 } else { 2283 rtnl_lock(); 2284 adapter->force_reset_recovery = false; 2285 rc = do_hard_reset(adapter, rwi, reset_state); 2286 rtnl_unlock(); 2287 } 2288 if (rc) { 2289 /* give backing device time to settle down */ 2290 netdev_dbg(adapter->netdev, 2291 "[S:%d] Hard reset failed, waiting 60 secs\n", 2292 adapter->state); 2293 set_current_state(TASK_UNINTERRUPTIBLE); 2294 schedule_timeout(60 * HZ); 2295 } 2296 } else { 2297 rc = do_reset(adapter, rwi, reset_state); 2298 } 2299 kfree(rwi); 2300 adapter->last_reset_time = jiffies; 2301 2302 if (rc) 2303 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2304 2305 rwi = get_next_rwi(adapter); 2306 2307 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2308 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2309 adapter->force_reset_recovery = true; 2310 } 2311 2312 if (adapter->wait_for_reset) { 2313 adapter->reset_done_rc = rc; 2314 complete(&adapter->reset_done); 2315 } 2316 2317 clear_bit_unlock(0, &adapter->resetting); 2318 2319 netdev_dbg(adapter->netdev, 2320 "[S:%d FRR:%d WFR:%d] Done processing resets\n", 2321 adapter->state, adapter->force_reset_recovery, 2322 adapter->wait_for_reset); 2323 } 2324 2325 static void __ibmvnic_delayed_reset(struct work_struct *work) 2326 { 2327 struct ibmvnic_adapter *adapter; 2328 2329 adapter = container_of(work, struct ibmvnic_adapter, 2330 ibmvnic_delayed_reset.work); 2331 __ibmvnic_reset(&adapter->ibmvnic_reset); 2332 } 2333 2334 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2335 enum ibmvnic_reset_reason reason) 2336 { 2337 struct list_head *entry, *tmp_entry; 2338 struct ibmvnic_rwi *rwi, *tmp; 2339 struct net_device *netdev = adapter->netdev; 2340 unsigned long flags; 2341 int ret; 2342 2343 spin_lock_irqsave(&adapter->rwi_lock, flags); 2344 2345 /* If failover is pending don't schedule any other reset. 2346 * Instead let the failover complete. If there is already a 2347 * a failover reset scheduled, we will detect and drop the 2348 * duplicate reset when walking the ->rwi_list below. 2349 */ 2350 if (adapter->state == VNIC_REMOVING || 2351 adapter->state == VNIC_REMOVED || 2352 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2353 ret = EBUSY; 2354 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2355 goto err; 2356 } 2357 2358 if (adapter->state == VNIC_PROBING) { 2359 netdev_warn(netdev, "Adapter reset during probe\n"); 2360 adapter->init_done_rc = EAGAIN; 2361 ret = EAGAIN; 2362 goto err; 2363 } 2364 2365 list_for_each(entry, &adapter->rwi_list) { 2366 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2367 if (tmp->reset_reason == reason) { 2368 netdev_dbg(netdev, "Skipping matching reset, reason=%d\n", 2369 reason); 2370 ret = EBUSY; 2371 goto err; 2372 } 2373 } 2374 2375 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2376 if (!rwi) { 2377 ret = ENOMEM; 2378 goto err; 2379 } 2380 /* if we just received a transport event, 2381 * flush reset queue and process this reset 2382 */ 2383 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2384 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2385 list_del(entry); 2386 } 2387 rwi->reset_reason = reason; 2388 list_add_tail(&rwi->list, &adapter->rwi_list); 2389 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2390 schedule_work(&adapter->ibmvnic_reset); 2391 2392 ret = 0; 2393 err: 2394 /* ibmvnic_close() below can block, so drop the lock first */ 2395 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2396 2397 if (ret == ENOMEM) 2398 ibmvnic_close(netdev); 2399 2400 return -ret; 2401 } 2402 2403 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2404 { 2405 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2406 2407 if (test_bit(0, &adapter->resetting)) { 2408 netdev_err(adapter->netdev, 2409 "Adapter is resetting, skip timeout reset\n"); 2410 return; 2411 } 2412 /* No queuing up reset until at least 5 seconds (default watchdog val) 2413 * after last reset 2414 */ 2415 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2416 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2417 return; 2418 } 2419 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2420 } 2421 2422 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2423 struct ibmvnic_rx_buff *rx_buff) 2424 { 2425 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2426 2427 rx_buff->skb = NULL; 2428 2429 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2430 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2431 2432 atomic_dec(&pool->available); 2433 } 2434 2435 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2436 { 2437 struct ibmvnic_sub_crq_queue *rx_scrq; 2438 struct ibmvnic_adapter *adapter; 2439 struct net_device *netdev; 2440 int frames_processed; 2441 int scrq_num; 2442 2443 netdev = napi->dev; 2444 adapter = netdev_priv(netdev); 2445 scrq_num = (int)(napi - adapter->napi); 2446 frames_processed = 0; 2447 rx_scrq = adapter->rx_scrq[scrq_num]; 2448 2449 restart_poll: 2450 while (frames_processed < budget) { 2451 struct sk_buff *skb; 2452 struct ibmvnic_rx_buff *rx_buff; 2453 union sub_crq *next; 2454 u32 length; 2455 u16 offset; 2456 u8 flags = 0; 2457 2458 if (unlikely(test_bit(0, &adapter->resetting) && 2459 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2460 enable_scrq_irq(adapter, rx_scrq); 2461 napi_complete_done(napi, frames_processed); 2462 return frames_processed; 2463 } 2464 2465 if (!pending_scrq(adapter, rx_scrq)) 2466 break; 2467 next = ibmvnic_next_scrq(adapter, rx_scrq); 2468 rx_buff = (struct ibmvnic_rx_buff *) 2469 be64_to_cpu(next->rx_comp.correlator); 2470 /* do error checking */ 2471 if (next->rx_comp.rc) { 2472 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2473 be16_to_cpu(next->rx_comp.rc)); 2474 /* free the entry */ 2475 next->rx_comp.first = 0; 2476 dev_kfree_skb_any(rx_buff->skb); 2477 remove_buff_from_pool(adapter, rx_buff); 2478 continue; 2479 } else if (!rx_buff->skb) { 2480 /* free the entry */ 2481 next->rx_comp.first = 0; 2482 remove_buff_from_pool(adapter, rx_buff); 2483 continue; 2484 } 2485 2486 length = be32_to_cpu(next->rx_comp.len); 2487 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2488 flags = next->rx_comp.flags; 2489 skb = rx_buff->skb; 2490 /* load long_term_buff before copying to skb */ 2491 dma_rmb(); 2492 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2493 length); 2494 2495 /* VLAN Header has been stripped by the system firmware and 2496 * needs to be inserted by the driver 2497 */ 2498 if (adapter->rx_vlan_header_insertion && 2499 (flags & IBMVNIC_VLAN_STRIPPED)) 2500 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2501 ntohs(next->rx_comp.vlan_tci)); 2502 2503 /* free the entry */ 2504 next->rx_comp.first = 0; 2505 remove_buff_from_pool(adapter, rx_buff); 2506 2507 skb_put(skb, length); 2508 skb->protocol = eth_type_trans(skb, netdev); 2509 skb_record_rx_queue(skb, scrq_num); 2510 2511 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2512 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2513 skb->ip_summed = CHECKSUM_UNNECESSARY; 2514 } 2515 2516 length = skb->len; 2517 napi_gro_receive(napi, skb); /* send it up */ 2518 netdev->stats.rx_packets++; 2519 netdev->stats.rx_bytes += length; 2520 adapter->rx_stats_buffers[scrq_num].packets++; 2521 adapter->rx_stats_buffers[scrq_num].bytes += length; 2522 frames_processed++; 2523 } 2524 2525 if (adapter->state != VNIC_CLOSING && 2526 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2527 adapter->req_rx_add_entries_per_subcrq / 2) || 2528 frames_processed < budget)) 2529 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2530 if (frames_processed < budget) { 2531 if (napi_complete_done(napi, frames_processed)) { 2532 enable_scrq_irq(adapter, rx_scrq); 2533 if (pending_scrq(adapter, rx_scrq)) { 2534 if (napi_reschedule(napi)) { 2535 disable_scrq_irq(adapter, rx_scrq); 2536 goto restart_poll; 2537 } 2538 } 2539 } 2540 } 2541 return frames_processed; 2542 } 2543 2544 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2545 { 2546 int rc, ret; 2547 2548 adapter->fallback.mtu = adapter->req_mtu; 2549 adapter->fallback.rx_queues = adapter->req_rx_queues; 2550 adapter->fallback.tx_queues = adapter->req_tx_queues; 2551 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2552 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2553 2554 reinit_completion(&adapter->reset_done); 2555 adapter->wait_for_reset = true; 2556 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2557 2558 if (rc) { 2559 ret = rc; 2560 goto out; 2561 } 2562 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2563 if (rc) { 2564 ret = -ENODEV; 2565 goto out; 2566 } 2567 2568 ret = 0; 2569 if (adapter->reset_done_rc) { 2570 ret = -EIO; 2571 adapter->desired.mtu = adapter->fallback.mtu; 2572 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2573 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2574 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2575 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2576 2577 reinit_completion(&adapter->reset_done); 2578 adapter->wait_for_reset = true; 2579 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2580 if (rc) { 2581 ret = rc; 2582 goto out; 2583 } 2584 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2585 60000); 2586 if (rc) { 2587 ret = -ENODEV; 2588 goto out; 2589 } 2590 } 2591 out: 2592 adapter->wait_for_reset = false; 2593 2594 return ret; 2595 } 2596 2597 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2598 { 2599 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2600 2601 adapter->desired.mtu = new_mtu + ETH_HLEN; 2602 2603 return wait_for_reset(adapter); 2604 } 2605 2606 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2607 struct net_device *dev, 2608 netdev_features_t features) 2609 { 2610 /* Some backing hardware adapters can not 2611 * handle packets with a MSS less than 224 2612 * or with only one segment. 2613 */ 2614 if (skb_is_gso(skb)) { 2615 if (skb_shinfo(skb)->gso_size < 224 || 2616 skb_shinfo(skb)->gso_segs == 1) 2617 features &= ~NETIF_F_GSO_MASK; 2618 } 2619 2620 return features; 2621 } 2622 2623 static const struct net_device_ops ibmvnic_netdev_ops = { 2624 .ndo_open = ibmvnic_open, 2625 .ndo_stop = ibmvnic_close, 2626 .ndo_start_xmit = ibmvnic_xmit, 2627 .ndo_set_rx_mode = ibmvnic_set_multi, 2628 .ndo_set_mac_address = ibmvnic_set_mac, 2629 .ndo_validate_addr = eth_validate_addr, 2630 .ndo_tx_timeout = ibmvnic_tx_timeout, 2631 .ndo_change_mtu = ibmvnic_change_mtu, 2632 .ndo_features_check = ibmvnic_features_check, 2633 }; 2634 2635 /* ethtool functions */ 2636 2637 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2638 struct ethtool_link_ksettings *cmd) 2639 { 2640 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2641 int rc; 2642 2643 rc = send_query_phys_parms(adapter); 2644 if (rc) { 2645 adapter->speed = SPEED_UNKNOWN; 2646 adapter->duplex = DUPLEX_UNKNOWN; 2647 } 2648 cmd->base.speed = adapter->speed; 2649 cmd->base.duplex = adapter->duplex; 2650 cmd->base.port = PORT_FIBRE; 2651 cmd->base.phy_address = 0; 2652 cmd->base.autoneg = AUTONEG_ENABLE; 2653 2654 return 0; 2655 } 2656 2657 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2658 struct ethtool_drvinfo *info) 2659 { 2660 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2661 2662 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2663 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2664 strscpy(info->fw_version, adapter->fw_version, 2665 sizeof(info->fw_version)); 2666 } 2667 2668 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2669 { 2670 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2671 2672 return adapter->msg_enable; 2673 } 2674 2675 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2676 { 2677 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2678 2679 adapter->msg_enable = data; 2680 } 2681 2682 static u32 ibmvnic_get_link(struct net_device *netdev) 2683 { 2684 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2685 2686 /* Don't need to send a query because we request a logical link up at 2687 * init and then we wait for link state indications 2688 */ 2689 return adapter->logical_link_state; 2690 } 2691 2692 static void ibmvnic_get_ringparam(struct net_device *netdev, 2693 struct ethtool_ringparam *ring) 2694 { 2695 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2696 2697 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2698 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2699 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2700 } else { 2701 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2702 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2703 } 2704 ring->rx_mini_max_pending = 0; 2705 ring->rx_jumbo_max_pending = 0; 2706 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2707 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2708 ring->rx_mini_pending = 0; 2709 ring->rx_jumbo_pending = 0; 2710 } 2711 2712 static int ibmvnic_set_ringparam(struct net_device *netdev, 2713 struct ethtool_ringparam *ring) 2714 { 2715 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2716 int ret; 2717 2718 ret = 0; 2719 adapter->desired.rx_entries = ring->rx_pending; 2720 adapter->desired.tx_entries = ring->tx_pending; 2721 2722 ret = wait_for_reset(adapter); 2723 2724 if (!ret && 2725 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2726 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2727 netdev_info(netdev, 2728 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2729 ring->rx_pending, ring->tx_pending, 2730 adapter->req_rx_add_entries_per_subcrq, 2731 adapter->req_tx_entries_per_subcrq); 2732 return ret; 2733 } 2734 2735 static void ibmvnic_get_channels(struct net_device *netdev, 2736 struct ethtool_channels *channels) 2737 { 2738 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2739 2740 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2741 channels->max_rx = adapter->max_rx_queues; 2742 channels->max_tx = adapter->max_tx_queues; 2743 } else { 2744 channels->max_rx = IBMVNIC_MAX_QUEUES; 2745 channels->max_tx = IBMVNIC_MAX_QUEUES; 2746 } 2747 2748 channels->max_other = 0; 2749 channels->max_combined = 0; 2750 channels->rx_count = adapter->req_rx_queues; 2751 channels->tx_count = adapter->req_tx_queues; 2752 channels->other_count = 0; 2753 channels->combined_count = 0; 2754 } 2755 2756 static int ibmvnic_set_channels(struct net_device *netdev, 2757 struct ethtool_channels *channels) 2758 { 2759 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2760 int ret; 2761 2762 ret = 0; 2763 adapter->desired.rx_queues = channels->rx_count; 2764 adapter->desired.tx_queues = channels->tx_count; 2765 2766 ret = wait_for_reset(adapter); 2767 2768 if (!ret && 2769 (adapter->req_rx_queues != channels->rx_count || 2770 adapter->req_tx_queues != channels->tx_count)) 2771 netdev_info(netdev, 2772 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2773 channels->rx_count, channels->tx_count, 2774 adapter->req_rx_queues, adapter->req_tx_queues); 2775 return ret; 2776 } 2777 2778 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2779 { 2780 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2781 int i; 2782 2783 switch (stringset) { 2784 case ETH_SS_STATS: 2785 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2786 i++, data += ETH_GSTRING_LEN) 2787 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2788 2789 for (i = 0; i < adapter->req_tx_queues; i++) { 2790 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2791 data += ETH_GSTRING_LEN; 2792 2793 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2794 data += ETH_GSTRING_LEN; 2795 2796 snprintf(data, ETH_GSTRING_LEN, 2797 "tx%d_dropped_packets", i); 2798 data += ETH_GSTRING_LEN; 2799 } 2800 2801 for (i = 0; i < adapter->req_rx_queues; i++) { 2802 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2803 data += ETH_GSTRING_LEN; 2804 2805 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2806 data += ETH_GSTRING_LEN; 2807 2808 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2809 data += ETH_GSTRING_LEN; 2810 } 2811 break; 2812 2813 case ETH_SS_PRIV_FLAGS: 2814 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2815 strcpy(data + i * ETH_GSTRING_LEN, 2816 ibmvnic_priv_flags[i]); 2817 break; 2818 default: 2819 return; 2820 } 2821 } 2822 2823 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2824 { 2825 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2826 2827 switch (sset) { 2828 case ETH_SS_STATS: 2829 return ARRAY_SIZE(ibmvnic_stats) + 2830 adapter->req_tx_queues * NUM_TX_STATS + 2831 adapter->req_rx_queues * NUM_RX_STATS; 2832 case ETH_SS_PRIV_FLAGS: 2833 return ARRAY_SIZE(ibmvnic_priv_flags); 2834 default: 2835 return -EOPNOTSUPP; 2836 } 2837 } 2838 2839 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2840 struct ethtool_stats *stats, u64 *data) 2841 { 2842 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2843 union ibmvnic_crq crq; 2844 int i, j; 2845 int rc; 2846 2847 memset(&crq, 0, sizeof(crq)); 2848 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2849 crq.request_statistics.cmd = REQUEST_STATISTICS; 2850 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2851 crq.request_statistics.len = 2852 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2853 2854 /* Wait for data to be written */ 2855 reinit_completion(&adapter->stats_done); 2856 rc = ibmvnic_send_crq(adapter, &crq); 2857 if (rc) 2858 return; 2859 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2860 if (rc) 2861 return; 2862 2863 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2864 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 2865 (adapter, ibmvnic_stats[i].offset)); 2866 2867 for (j = 0; j < adapter->req_tx_queues; j++) { 2868 data[i] = adapter->tx_stats_buffers[j].packets; 2869 i++; 2870 data[i] = adapter->tx_stats_buffers[j].bytes; 2871 i++; 2872 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2873 i++; 2874 } 2875 2876 for (j = 0; j < adapter->req_rx_queues; j++) { 2877 data[i] = adapter->rx_stats_buffers[j].packets; 2878 i++; 2879 data[i] = adapter->rx_stats_buffers[j].bytes; 2880 i++; 2881 data[i] = adapter->rx_stats_buffers[j].interrupts; 2882 i++; 2883 } 2884 } 2885 2886 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2887 { 2888 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2889 2890 return adapter->priv_flags; 2891 } 2892 2893 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2894 { 2895 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2896 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2897 2898 if (which_maxes) 2899 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2900 else 2901 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2902 2903 return 0; 2904 } 2905 2906 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2907 .get_drvinfo = ibmvnic_get_drvinfo, 2908 .get_msglevel = ibmvnic_get_msglevel, 2909 .set_msglevel = ibmvnic_set_msglevel, 2910 .get_link = ibmvnic_get_link, 2911 .get_ringparam = ibmvnic_get_ringparam, 2912 .set_ringparam = ibmvnic_set_ringparam, 2913 .get_channels = ibmvnic_get_channels, 2914 .set_channels = ibmvnic_set_channels, 2915 .get_strings = ibmvnic_get_strings, 2916 .get_sset_count = ibmvnic_get_sset_count, 2917 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2918 .get_link_ksettings = ibmvnic_get_link_ksettings, 2919 .get_priv_flags = ibmvnic_get_priv_flags, 2920 .set_priv_flags = ibmvnic_set_priv_flags, 2921 }; 2922 2923 /* Routines for managing CRQs/sCRQs */ 2924 2925 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2926 struct ibmvnic_sub_crq_queue *scrq) 2927 { 2928 int rc; 2929 2930 if (!scrq) { 2931 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 2932 return -EINVAL; 2933 } 2934 2935 if (scrq->irq) { 2936 free_irq(scrq->irq, scrq); 2937 irq_dispose_mapping(scrq->irq); 2938 scrq->irq = 0; 2939 } 2940 2941 if (scrq->msgs) { 2942 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2943 atomic_set(&scrq->used, 0); 2944 scrq->cur = 0; 2945 scrq->ind_buf.index = 0; 2946 } else { 2947 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 2948 return -EINVAL; 2949 } 2950 2951 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2952 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2953 return rc; 2954 } 2955 2956 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2957 { 2958 int i, rc; 2959 2960 if (!adapter->tx_scrq || !adapter->rx_scrq) 2961 return -EINVAL; 2962 2963 for (i = 0; i < adapter->req_tx_queues; i++) { 2964 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2965 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2966 if (rc) 2967 return rc; 2968 } 2969 2970 for (i = 0; i < adapter->req_rx_queues; i++) { 2971 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2972 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2973 if (rc) 2974 return rc; 2975 } 2976 2977 return rc; 2978 } 2979 2980 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2981 struct ibmvnic_sub_crq_queue *scrq, 2982 bool do_h_free) 2983 { 2984 struct device *dev = &adapter->vdev->dev; 2985 long rc; 2986 2987 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2988 2989 if (do_h_free) { 2990 /* Close the sub-crqs */ 2991 do { 2992 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2993 adapter->vdev->unit_address, 2994 scrq->crq_num); 2995 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2996 2997 if (rc) { 2998 netdev_err(adapter->netdev, 2999 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3000 scrq->crq_num, rc); 3001 } 3002 } 3003 3004 dma_free_coherent(dev, 3005 IBMVNIC_IND_ARR_SZ, 3006 scrq->ind_buf.indir_arr, 3007 scrq->ind_buf.indir_dma); 3008 3009 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3010 DMA_BIDIRECTIONAL); 3011 free_pages((unsigned long)scrq->msgs, 2); 3012 kfree(scrq); 3013 } 3014 3015 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3016 *adapter) 3017 { 3018 struct device *dev = &adapter->vdev->dev; 3019 struct ibmvnic_sub_crq_queue *scrq; 3020 int rc; 3021 3022 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3023 if (!scrq) 3024 return NULL; 3025 3026 scrq->msgs = 3027 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3028 if (!scrq->msgs) { 3029 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3030 goto zero_page_failed; 3031 } 3032 3033 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3034 DMA_BIDIRECTIONAL); 3035 if (dma_mapping_error(dev, scrq->msg_token)) { 3036 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3037 goto map_failed; 3038 } 3039 3040 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3041 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3042 3043 if (rc == H_RESOURCE) 3044 rc = ibmvnic_reset_crq(adapter); 3045 3046 if (rc == H_CLOSED) { 3047 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3048 } else if (rc) { 3049 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3050 goto reg_failed; 3051 } 3052 3053 scrq->adapter = adapter; 3054 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3055 scrq->ind_buf.index = 0; 3056 3057 scrq->ind_buf.indir_arr = 3058 dma_alloc_coherent(dev, 3059 IBMVNIC_IND_ARR_SZ, 3060 &scrq->ind_buf.indir_dma, 3061 GFP_KERNEL); 3062 3063 if (!scrq->ind_buf.indir_arr) 3064 goto indir_failed; 3065 3066 spin_lock_init(&scrq->lock); 3067 3068 netdev_dbg(adapter->netdev, 3069 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3070 scrq->crq_num, scrq->hw_irq, scrq->irq); 3071 3072 return scrq; 3073 3074 indir_failed: 3075 do { 3076 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3077 adapter->vdev->unit_address, 3078 scrq->crq_num); 3079 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3080 reg_failed: 3081 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3082 DMA_BIDIRECTIONAL); 3083 map_failed: 3084 free_pages((unsigned long)scrq->msgs, 2); 3085 zero_page_failed: 3086 kfree(scrq); 3087 3088 return NULL; 3089 } 3090 3091 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3092 { 3093 int i; 3094 3095 if (adapter->tx_scrq) { 3096 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3097 if (!adapter->tx_scrq[i]) 3098 continue; 3099 3100 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3101 i); 3102 if (adapter->tx_scrq[i]->irq) { 3103 free_irq(adapter->tx_scrq[i]->irq, 3104 adapter->tx_scrq[i]); 3105 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3106 adapter->tx_scrq[i]->irq = 0; 3107 } 3108 3109 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3110 do_h_free); 3111 } 3112 3113 kfree(adapter->tx_scrq); 3114 adapter->tx_scrq = NULL; 3115 adapter->num_active_tx_scrqs = 0; 3116 } 3117 3118 if (adapter->rx_scrq) { 3119 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3120 if (!adapter->rx_scrq[i]) 3121 continue; 3122 3123 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3124 i); 3125 if (adapter->rx_scrq[i]->irq) { 3126 free_irq(adapter->rx_scrq[i]->irq, 3127 adapter->rx_scrq[i]); 3128 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3129 adapter->rx_scrq[i]->irq = 0; 3130 } 3131 3132 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3133 do_h_free); 3134 } 3135 3136 kfree(adapter->rx_scrq); 3137 adapter->rx_scrq = NULL; 3138 adapter->num_active_rx_scrqs = 0; 3139 } 3140 } 3141 3142 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3143 struct ibmvnic_sub_crq_queue *scrq) 3144 { 3145 struct device *dev = &adapter->vdev->dev; 3146 unsigned long rc; 3147 3148 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3149 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3150 if (rc) 3151 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3152 scrq->hw_irq, rc); 3153 return rc; 3154 } 3155 3156 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3157 struct ibmvnic_sub_crq_queue *scrq) 3158 { 3159 struct device *dev = &adapter->vdev->dev; 3160 unsigned long rc; 3161 3162 if (scrq->hw_irq > 0x100000000ULL) { 3163 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3164 return 1; 3165 } 3166 3167 if (test_bit(0, &adapter->resetting) && 3168 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3169 u64 val = (0xff000000) | scrq->hw_irq; 3170 3171 rc = plpar_hcall_norets(H_EOI, val); 3172 /* H_EOI would fail with rc = H_FUNCTION when running 3173 * in XIVE mode which is expected, but not an error. 3174 */ 3175 if (rc && rc != H_FUNCTION) 3176 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3177 val, rc); 3178 } 3179 3180 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3181 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3182 if (rc) 3183 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3184 scrq->hw_irq, rc); 3185 return rc; 3186 } 3187 3188 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3189 struct ibmvnic_sub_crq_queue *scrq) 3190 { 3191 struct device *dev = &adapter->vdev->dev; 3192 struct ibmvnic_tx_pool *tx_pool; 3193 struct ibmvnic_tx_buff *txbuff; 3194 struct netdev_queue *txq; 3195 union sub_crq *next; 3196 int index; 3197 int i; 3198 3199 restart_loop: 3200 while (pending_scrq(adapter, scrq)) { 3201 unsigned int pool = scrq->pool_index; 3202 int num_entries = 0; 3203 int total_bytes = 0; 3204 int num_packets = 0; 3205 3206 next = ibmvnic_next_scrq(adapter, scrq); 3207 for (i = 0; i < next->tx_comp.num_comps; i++) { 3208 if (next->tx_comp.rcs[i]) 3209 dev_err(dev, "tx error %x\n", 3210 next->tx_comp.rcs[i]); 3211 index = be32_to_cpu(next->tx_comp.correlators[i]); 3212 if (index & IBMVNIC_TSO_POOL_MASK) { 3213 tx_pool = &adapter->tso_pool[pool]; 3214 index &= ~IBMVNIC_TSO_POOL_MASK; 3215 } else { 3216 tx_pool = &adapter->tx_pool[pool]; 3217 } 3218 3219 txbuff = &tx_pool->tx_buff[index]; 3220 num_packets++; 3221 num_entries += txbuff->num_entries; 3222 if (txbuff->skb) { 3223 total_bytes += txbuff->skb->len; 3224 dev_consume_skb_irq(txbuff->skb); 3225 txbuff->skb = NULL; 3226 } else { 3227 netdev_warn(adapter->netdev, 3228 "TX completion received with NULL socket buffer\n"); 3229 } 3230 tx_pool->free_map[tx_pool->producer_index] = index; 3231 tx_pool->producer_index = 3232 (tx_pool->producer_index + 1) % 3233 tx_pool->num_buffers; 3234 } 3235 /* remove tx_comp scrq*/ 3236 next->tx_comp.first = 0; 3237 3238 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3239 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3240 3241 if (atomic_sub_return(num_entries, &scrq->used) <= 3242 (adapter->req_tx_entries_per_subcrq / 2) && 3243 __netif_subqueue_stopped(adapter->netdev, 3244 scrq->pool_index)) { 3245 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3246 netdev_dbg(adapter->netdev, "Started queue %d\n", 3247 scrq->pool_index); 3248 } 3249 } 3250 3251 enable_scrq_irq(adapter, scrq); 3252 3253 if (pending_scrq(adapter, scrq)) { 3254 disable_scrq_irq(adapter, scrq); 3255 goto restart_loop; 3256 } 3257 3258 return 0; 3259 } 3260 3261 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3262 { 3263 struct ibmvnic_sub_crq_queue *scrq = instance; 3264 struct ibmvnic_adapter *adapter = scrq->adapter; 3265 3266 disable_scrq_irq(adapter, scrq); 3267 ibmvnic_complete_tx(adapter, scrq); 3268 3269 return IRQ_HANDLED; 3270 } 3271 3272 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3273 { 3274 struct ibmvnic_sub_crq_queue *scrq = instance; 3275 struct ibmvnic_adapter *adapter = scrq->adapter; 3276 3277 /* When booting a kdump kernel we can hit pending interrupts 3278 * prior to completing driver initialization. 3279 */ 3280 if (unlikely(adapter->state != VNIC_OPEN)) 3281 return IRQ_NONE; 3282 3283 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3284 3285 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3286 disable_scrq_irq(adapter, scrq); 3287 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3288 } 3289 3290 return IRQ_HANDLED; 3291 } 3292 3293 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3294 { 3295 struct device *dev = &adapter->vdev->dev; 3296 struct ibmvnic_sub_crq_queue *scrq; 3297 int i = 0, j = 0; 3298 int rc = 0; 3299 3300 for (i = 0; i < adapter->req_tx_queues; i++) { 3301 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3302 i); 3303 scrq = adapter->tx_scrq[i]; 3304 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3305 3306 if (!scrq->irq) { 3307 rc = -EINVAL; 3308 dev_err(dev, "Error mapping irq\n"); 3309 goto req_tx_irq_failed; 3310 } 3311 3312 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3313 adapter->vdev->unit_address, i); 3314 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3315 0, scrq->name, scrq); 3316 3317 if (rc) { 3318 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3319 scrq->irq, rc); 3320 irq_dispose_mapping(scrq->irq); 3321 goto req_tx_irq_failed; 3322 } 3323 } 3324 3325 for (i = 0; i < adapter->req_rx_queues; i++) { 3326 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3327 i); 3328 scrq = adapter->rx_scrq[i]; 3329 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3330 if (!scrq->irq) { 3331 rc = -EINVAL; 3332 dev_err(dev, "Error mapping irq\n"); 3333 goto req_rx_irq_failed; 3334 } 3335 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3336 adapter->vdev->unit_address, i); 3337 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3338 0, scrq->name, scrq); 3339 if (rc) { 3340 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3341 scrq->irq, rc); 3342 irq_dispose_mapping(scrq->irq); 3343 goto req_rx_irq_failed; 3344 } 3345 } 3346 return rc; 3347 3348 req_rx_irq_failed: 3349 for (j = 0; j < i; j++) { 3350 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3351 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3352 } 3353 i = adapter->req_tx_queues; 3354 req_tx_irq_failed: 3355 for (j = 0; j < i; j++) { 3356 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3357 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3358 } 3359 release_sub_crqs(adapter, 1); 3360 return rc; 3361 } 3362 3363 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3364 { 3365 struct device *dev = &adapter->vdev->dev; 3366 struct ibmvnic_sub_crq_queue **allqueues; 3367 int registered_queues = 0; 3368 int total_queues; 3369 int more = 0; 3370 int i; 3371 3372 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3373 3374 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3375 if (!allqueues) 3376 return -1; 3377 3378 for (i = 0; i < total_queues; i++) { 3379 allqueues[i] = init_sub_crq_queue(adapter); 3380 if (!allqueues[i]) { 3381 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3382 break; 3383 } 3384 registered_queues++; 3385 } 3386 3387 /* Make sure we were able to register the minimum number of queues */ 3388 if (registered_queues < 3389 adapter->min_tx_queues + adapter->min_rx_queues) { 3390 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3391 goto tx_failed; 3392 } 3393 3394 /* Distribute the failed allocated queues*/ 3395 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3396 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3397 switch (i % 3) { 3398 case 0: 3399 if (adapter->req_rx_queues > adapter->min_rx_queues) 3400 adapter->req_rx_queues--; 3401 else 3402 more++; 3403 break; 3404 case 1: 3405 if (adapter->req_tx_queues > adapter->min_tx_queues) 3406 adapter->req_tx_queues--; 3407 else 3408 more++; 3409 break; 3410 } 3411 } 3412 3413 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3414 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3415 if (!adapter->tx_scrq) 3416 goto tx_failed; 3417 3418 for (i = 0; i < adapter->req_tx_queues; i++) { 3419 adapter->tx_scrq[i] = allqueues[i]; 3420 adapter->tx_scrq[i]->pool_index = i; 3421 adapter->num_active_tx_scrqs++; 3422 } 3423 3424 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3425 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3426 if (!adapter->rx_scrq) 3427 goto rx_failed; 3428 3429 for (i = 0; i < adapter->req_rx_queues; i++) { 3430 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3431 adapter->rx_scrq[i]->scrq_num = i; 3432 adapter->num_active_rx_scrqs++; 3433 } 3434 3435 kfree(allqueues); 3436 return 0; 3437 3438 rx_failed: 3439 kfree(adapter->tx_scrq); 3440 adapter->tx_scrq = NULL; 3441 tx_failed: 3442 for (i = 0; i < registered_queues; i++) 3443 release_sub_crq_queue(adapter, allqueues[i], 1); 3444 kfree(allqueues); 3445 return -1; 3446 } 3447 3448 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3449 { 3450 struct device *dev = &adapter->vdev->dev; 3451 union ibmvnic_crq crq; 3452 int max_entries; 3453 3454 if (!retry) { 3455 /* Sub-CRQ entries are 32 byte long */ 3456 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3457 3458 if (adapter->min_tx_entries_per_subcrq > entries_page || 3459 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3460 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3461 return; 3462 } 3463 3464 if (adapter->desired.mtu) 3465 adapter->req_mtu = adapter->desired.mtu; 3466 else 3467 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3468 3469 if (!adapter->desired.tx_entries) 3470 adapter->desired.tx_entries = 3471 adapter->max_tx_entries_per_subcrq; 3472 if (!adapter->desired.rx_entries) 3473 adapter->desired.rx_entries = 3474 adapter->max_rx_add_entries_per_subcrq; 3475 3476 max_entries = IBMVNIC_MAX_LTB_SIZE / 3477 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3478 3479 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3480 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3481 adapter->desired.tx_entries = max_entries; 3482 } 3483 3484 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3485 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3486 adapter->desired.rx_entries = max_entries; 3487 } 3488 3489 if (adapter->desired.tx_entries) 3490 adapter->req_tx_entries_per_subcrq = 3491 adapter->desired.tx_entries; 3492 else 3493 adapter->req_tx_entries_per_subcrq = 3494 adapter->max_tx_entries_per_subcrq; 3495 3496 if (adapter->desired.rx_entries) 3497 adapter->req_rx_add_entries_per_subcrq = 3498 adapter->desired.rx_entries; 3499 else 3500 adapter->req_rx_add_entries_per_subcrq = 3501 adapter->max_rx_add_entries_per_subcrq; 3502 3503 if (adapter->desired.tx_queues) 3504 adapter->req_tx_queues = 3505 adapter->desired.tx_queues; 3506 else 3507 adapter->req_tx_queues = 3508 adapter->opt_tx_comp_sub_queues; 3509 3510 if (adapter->desired.rx_queues) 3511 adapter->req_rx_queues = 3512 adapter->desired.rx_queues; 3513 else 3514 adapter->req_rx_queues = 3515 adapter->opt_rx_comp_queues; 3516 3517 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3518 } 3519 3520 memset(&crq, 0, sizeof(crq)); 3521 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3522 crq.request_capability.cmd = REQUEST_CAPABILITY; 3523 3524 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3525 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3526 atomic_inc(&adapter->running_cap_crqs); 3527 ibmvnic_send_crq(adapter, &crq); 3528 3529 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3530 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3531 atomic_inc(&adapter->running_cap_crqs); 3532 ibmvnic_send_crq(adapter, &crq); 3533 3534 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3535 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3536 atomic_inc(&adapter->running_cap_crqs); 3537 ibmvnic_send_crq(adapter, &crq); 3538 3539 crq.request_capability.capability = 3540 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3541 crq.request_capability.number = 3542 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3543 atomic_inc(&adapter->running_cap_crqs); 3544 ibmvnic_send_crq(adapter, &crq); 3545 3546 crq.request_capability.capability = 3547 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3548 crq.request_capability.number = 3549 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3550 atomic_inc(&adapter->running_cap_crqs); 3551 ibmvnic_send_crq(adapter, &crq); 3552 3553 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3554 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3555 atomic_inc(&adapter->running_cap_crqs); 3556 ibmvnic_send_crq(adapter, &crq); 3557 3558 if (adapter->netdev->flags & IFF_PROMISC) { 3559 if (adapter->promisc_supported) { 3560 crq.request_capability.capability = 3561 cpu_to_be16(PROMISC_REQUESTED); 3562 crq.request_capability.number = cpu_to_be64(1); 3563 atomic_inc(&adapter->running_cap_crqs); 3564 ibmvnic_send_crq(adapter, &crq); 3565 } 3566 } else { 3567 crq.request_capability.capability = 3568 cpu_to_be16(PROMISC_REQUESTED); 3569 crq.request_capability.number = cpu_to_be64(0); 3570 atomic_inc(&adapter->running_cap_crqs); 3571 ibmvnic_send_crq(adapter, &crq); 3572 } 3573 } 3574 3575 static int pending_scrq(struct ibmvnic_adapter *adapter, 3576 struct ibmvnic_sub_crq_queue *scrq) 3577 { 3578 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3579 int rc; 3580 3581 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 3582 3583 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3584 * contents of the SCRQ descriptor 3585 */ 3586 dma_rmb(); 3587 3588 return rc; 3589 } 3590 3591 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3592 struct ibmvnic_sub_crq_queue *scrq) 3593 { 3594 union sub_crq *entry; 3595 unsigned long flags; 3596 3597 spin_lock_irqsave(&scrq->lock, flags); 3598 entry = &scrq->msgs[scrq->cur]; 3599 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3600 if (++scrq->cur == scrq->size) 3601 scrq->cur = 0; 3602 } else { 3603 entry = NULL; 3604 } 3605 spin_unlock_irqrestore(&scrq->lock, flags); 3606 3607 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3608 * contents of the SCRQ descriptor 3609 */ 3610 dma_rmb(); 3611 3612 return entry; 3613 } 3614 3615 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3616 { 3617 struct ibmvnic_crq_queue *queue = &adapter->crq; 3618 union ibmvnic_crq *crq; 3619 3620 crq = &queue->msgs[queue->cur]; 3621 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3622 if (++queue->cur == queue->size) 3623 queue->cur = 0; 3624 } else { 3625 crq = NULL; 3626 } 3627 3628 return crq; 3629 } 3630 3631 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3632 { 3633 switch (rc) { 3634 case H_PARAMETER: 3635 dev_warn_ratelimited(dev, 3636 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3637 func, rc); 3638 break; 3639 case H_CLOSED: 3640 dev_warn_ratelimited(dev, 3641 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3642 func, rc); 3643 break; 3644 default: 3645 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3646 break; 3647 } 3648 } 3649 3650 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3651 u64 remote_handle, u64 ioba, u64 num_entries) 3652 { 3653 unsigned int ua = adapter->vdev->unit_address; 3654 struct device *dev = &adapter->vdev->dev; 3655 int rc; 3656 3657 /* Make sure the hypervisor sees the complete request */ 3658 dma_wmb(); 3659 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3660 cpu_to_be64(remote_handle), 3661 ioba, num_entries); 3662 3663 if (rc) 3664 print_subcrq_error(dev, rc, __func__); 3665 3666 return rc; 3667 } 3668 3669 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3670 union ibmvnic_crq *crq) 3671 { 3672 unsigned int ua = adapter->vdev->unit_address; 3673 struct device *dev = &adapter->vdev->dev; 3674 u64 *u64_crq = (u64 *)crq; 3675 int rc; 3676 3677 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3678 (unsigned long)cpu_to_be64(u64_crq[0]), 3679 (unsigned long)cpu_to_be64(u64_crq[1])); 3680 3681 if (!adapter->crq.active && 3682 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3683 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3684 return -EINVAL; 3685 } 3686 3687 /* Make sure the hypervisor sees the complete request */ 3688 dma_wmb(); 3689 3690 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3691 cpu_to_be64(u64_crq[0]), 3692 cpu_to_be64(u64_crq[1])); 3693 3694 if (rc) { 3695 if (rc == H_CLOSED) { 3696 dev_warn(dev, "CRQ Queue closed\n"); 3697 /* do not reset, report the fail, wait for passive init from server */ 3698 } 3699 3700 dev_warn(dev, "Send error (rc=%d)\n", rc); 3701 } 3702 3703 return rc; 3704 } 3705 3706 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3707 { 3708 struct device *dev = &adapter->vdev->dev; 3709 union ibmvnic_crq crq; 3710 int retries = 100; 3711 int rc; 3712 3713 memset(&crq, 0, sizeof(crq)); 3714 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3715 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3716 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3717 3718 do { 3719 rc = ibmvnic_send_crq(adapter, &crq); 3720 if (rc != H_CLOSED) 3721 break; 3722 retries--; 3723 msleep(50); 3724 3725 } while (retries > 0); 3726 3727 if (rc) { 3728 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3729 return rc; 3730 } 3731 3732 return 0; 3733 } 3734 3735 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3736 { 3737 union ibmvnic_crq crq; 3738 3739 memset(&crq, 0, sizeof(crq)); 3740 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3741 crq.version_exchange.cmd = VERSION_EXCHANGE; 3742 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3743 3744 return ibmvnic_send_crq(adapter, &crq); 3745 } 3746 3747 struct vnic_login_client_data { 3748 u8 type; 3749 __be16 len; 3750 char name[]; 3751 } __packed; 3752 3753 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3754 { 3755 int len; 3756 3757 /* Calculate the amount of buffer space needed for the 3758 * vnic client data in the login buffer. There are four entries, 3759 * OS name, LPAR name, device name, and a null last entry. 3760 */ 3761 len = 4 * sizeof(struct vnic_login_client_data); 3762 len += 6; /* "Linux" plus NULL */ 3763 len += strlen(utsname()->nodename) + 1; 3764 len += strlen(adapter->netdev->name) + 1; 3765 3766 return len; 3767 } 3768 3769 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3770 struct vnic_login_client_data *vlcd) 3771 { 3772 const char *os_name = "Linux"; 3773 int len; 3774 3775 /* Type 1 - LPAR OS */ 3776 vlcd->type = 1; 3777 len = strlen(os_name) + 1; 3778 vlcd->len = cpu_to_be16(len); 3779 strncpy(vlcd->name, os_name, len); 3780 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3781 3782 /* Type 2 - LPAR name */ 3783 vlcd->type = 2; 3784 len = strlen(utsname()->nodename) + 1; 3785 vlcd->len = cpu_to_be16(len); 3786 strncpy(vlcd->name, utsname()->nodename, len); 3787 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3788 3789 /* Type 3 - device name */ 3790 vlcd->type = 3; 3791 len = strlen(adapter->netdev->name) + 1; 3792 vlcd->len = cpu_to_be16(len); 3793 strncpy(vlcd->name, adapter->netdev->name, len); 3794 } 3795 3796 static int send_login(struct ibmvnic_adapter *adapter) 3797 { 3798 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3799 struct ibmvnic_login_buffer *login_buffer; 3800 struct device *dev = &adapter->vdev->dev; 3801 struct vnic_login_client_data *vlcd; 3802 dma_addr_t rsp_buffer_token; 3803 dma_addr_t buffer_token; 3804 size_t rsp_buffer_size; 3805 union ibmvnic_crq crq; 3806 int client_data_len; 3807 size_t buffer_size; 3808 __be64 *tx_list_p; 3809 __be64 *rx_list_p; 3810 int rc; 3811 int i; 3812 3813 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3814 netdev_err(adapter->netdev, 3815 "RX or TX queues are not allocated, device login failed\n"); 3816 return -1; 3817 } 3818 3819 release_login_buffer(adapter); 3820 release_login_rsp_buffer(adapter); 3821 3822 client_data_len = vnic_client_data_len(adapter); 3823 3824 buffer_size = 3825 sizeof(struct ibmvnic_login_buffer) + 3826 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3827 client_data_len; 3828 3829 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3830 if (!login_buffer) 3831 goto buf_alloc_failed; 3832 3833 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3834 DMA_TO_DEVICE); 3835 if (dma_mapping_error(dev, buffer_token)) { 3836 dev_err(dev, "Couldn't map login buffer\n"); 3837 goto buf_map_failed; 3838 } 3839 3840 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3841 sizeof(u64) * adapter->req_tx_queues + 3842 sizeof(u64) * adapter->req_rx_queues + 3843 sizeof(u64) * adapter->req_rx_queues + 3844 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3845 3846 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3847 if (!login_rsp_buffer) 3848 goto buf_rsp_alloc_failed; 3849 3850 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3851 rsp_buffer_size, DMA_FROM_DEVICE); 3852 if (dma_mapping_error(dev, rsp_buffer_token)) { 3853 dev_err(dev, "Couldn't map login rsp buffer\n"); 3854 goto buf_rsp_map_failed; 3855 } 3856 3857 adapter->login_buf = login_buffer; 3858 adapter->login_buf_token = buffer_token; 3859 adapter->login_buf_sz = buffer_size; 3860 adapter->login_rsp_buf = login_rsp_buffer; 3861 adapter->login_rsp_buf_token = rsp_buffer_token; 3862 adapter->login_rsp_buf_sz = rsp_buffer_size; 3863 3864 login_buffer->len = cpu_to_be32(buffer_size); 3865 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3866 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3867 login_buffer->off_txcomp_subcrqs = 3868 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3869 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3870 login_buffer->off_rxcomp_subcrqs = 3871 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3872 sizeof(u64) * adapter->req_tx_queues); 3873 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3874 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3875 3876 tx_list_p = (__be64 *)((char *)login_buffer + 3877 sizeof(struct ibmvnic_login_buffer)); 3878 rx_list_p = (__be64 *)((char *)login_buffer + 3879 sizeof(struct ibmvnic_login_buffer) + 3880 sizeof(u64) * adapter->req_tx_queues); 3881 3882 for (i = 0; i < adapter->req_tx_queues; i++) { 3883 if (adapter->tx_scrq[i]) { 3884 tx_list_p[i] = 3885 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 3886 } 3887 } 3888 3889 for (i = 0; i < adapter->req_rx_queues; i++) { 3890 if (adapter->rx_scrq[i]) { 3891 rx_list_p[i] = 3892 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 3893 } 3894 } 3895 3896 /* Insert vNIC login client data */ 3897 vlcd = (struct vnic_login_client_data *) 3898 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3899 login_buffer->client_data_offset = 3900 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3901 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3902 3903 vnic_add_client_data(adapter, vlcd); 3904 3905 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3906 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3907 netdev_dbg(adapter->netdev, "%016lx\n", 3908 ((unsigned long *)(adapter->login_buf))[i]); 3909 } 3910 3911 memset(&crq, 0, sizeof(crq)); 3912 crq.login.first = IBMVNIC_CRQ_CMD; 3913 crq.login.cmd = LOGIN; 3914 crq.login.ioba = cpu_to_be32(buffer_token); 3915 crq.login.len = cpu_to_be32(buffer_size); 3916 3917 adapter->login_pending = true; 3918 rc = ibmvnic_send_crq(adapter, &crq); 3919 if (rc) { 3920 adapter->login_pending = false; 3921 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 3922 goto buf_rsp_map_failed; 3923 } 3924 3925 return 0; 3926 3927 buf_rsp_map_failed: 3928 kfree(login_rsp_buffer); 3929 adapter->login_rsp_buf = NULL; 3930 buf_rsp_alloc_failed: 3931 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3932 buf_map_failed: 3933 kfree(login_buffer); 3934 adapter->login_buf = NULL; 3935 buf_alloc_failed: 3936 return -1; 3937 } 3938 3939 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3940 u32 len, u8 map_id) 3941 { 3942 union ibmvnic_crq crq; 3943 3944 memset(&crq, 0, sizeof(crq)); 3945 crq.request_map.first = IBMVNIC_CRQ_CMD; 3946 crq.request_map.cmd = REQUEST_MAP; 3947 crq.request_map.map_id = map_id; 3948 crq.request_map.ioba = cpu_to_be32(addr); 3949 crq.request_map.len = cpu_to_be32(len); 3950 return ibmvnic_send_crq(adapter, &crq); 3951 } 3952 3953 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3954 { 3955 union ibmvnic_crq crq; 3956 3957 memset(&crq, 0, sizeof(crq)); 3958 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3959 crq.request_unmap.cmd = REQUEST_UNMAP; 3960 crq.request_unmap.map_id = map_id; 3961 return ibmvnic_send_crq(adapter, &crq); 3962 } 3963 3964 static void send_query_map(struct ibmvnic_adapter *adapter) 3965 { 3966 union ibmvnic_crq crq; 3967 3968 memset(&crq, 0, sizeof(crq)); 3969 crq.query_map.first = IBMVNIC_CRQ_CMD; 3970 crq.query_map.cmd = QUERY_MAP; 3971 ibmvnic_send_crq(adapter, &crq); 3972 } 3973 3974 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3975 static void send_query_cap(struct ibmvnic_adapter *adapter) 3976 { 3977 union ibmvnic_crq crq; 3978 3979 atomic_set(&adapter->running_cap_crqs, 0); 3980 memset(&crq, 0, sizeof(crq)); 3981 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3982 crq.query_capability.cmd = QUERY_CAPABILITY; 3983 3984 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3985 atomic_inc(&adapter->running_cap_crqs); 3986 ibmvnic_send_crq(adapter, &crq); 3987 3988 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3989 atomic_inc(&adapter->running_cap_crqs); 3990 ibmvnic_send_crq(adapter, &crq); 3991 3992 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3993 atomic_inc(&adapter->running_cap_crqs); 3994 ibmvnic_send_crq(adapter, &crq); 3995 3996 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3997 atomic_inc(&adapter->running_cap_crqs); 3998 ibmvnic_send_crq(adapter, &crq); 3999 4000 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4001 atomic_inc(&adapter->running_cap_crqs); 4002 ibmvnic_send_crq(adapter, &crq); 4003 4004 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4005 atomic_inc(&adapter->running_cap_crqs); 4006 ibmvnic_send_crq(adapter, &crq); 4007 4008 crq.query_capability.capability = 4009 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4010 atomic_inc(&adapter->running_cap_crqs); 4011 ibmvnic_send_crq(adapter, &crq); 4012 4013 crq.query_capability.capability = 4014 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4015 atomic_inc(&adapter->running_cap_crqs); 4016 ibmvnic_send_crq(adapter, &crq); 4017 4018 crq.query_capability.capability = 4019 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4020 atomic_inc(&adapter->running_cap_crqs); 4021 ibmvnic_send_crq(adapter, &crq); 4022 4023 crq.query_capability.capability = 4024 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4025 atomic_inc(&adapter->running_cap_crqs); 4026 ibmvnic_send_crq(adapter, &crq); 4027 4028 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4029 atomic_inc(&adapter->running_cap_crqs); 4030 ibmvnic_send_crq(adapter, &crq); 4031 4032 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4033 atomic_inc(&adapter->running_cap_crqs); 4034 ibmvnic_send_crq(adapter, &crq); 4035 4036 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4037 atomic_inc(&adapter->running_cap_crqs); 4038 ibmvnic_send_crq(adapter, &crq); 4039 4040 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4041 atomic_inc(&adapter->running_cap_crqs); 4042 ibmvnic_send_crq(adapter, &crq); 4043 4044 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4045 atomic_inc(&adapter->running_cap_crqs); 4046 ibmvnic_send_crq(adapter, &crq); 4047 4048 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4049 atomic_inc(&adapter->running_cap_crqs); 4050 ibmvnic_send_crq(adapter, &crq); 4051 4052 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4053 atomic_inc(&adapter->running_cap_crqs); 4054 ibmvnic_send_crq(adapter, &crq); 4055 4056 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4057 atomic_inc(&adapter->running_cap_crqs); 4058 ibmvnic_send_crq(adapter, &crq); 4059 4060 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4061 atomic_inc(&adapter->running_cap_crqs); 4062 ibmvnic_send_crq(adapter, &crq); 4063 4064 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4065 atomic_inc(&adapter->running_cap_crqs); 4066 ibmvnic_send_crq(adapter, &crq); 4067 4068 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4069 atomic_inc(&adapter->running_cap_crqs); 4070 ibmvnic_send_crq(adapter, &crq); 4071 4072 crq.query_capability.capability = 4073 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4074 atomic_inc(&adapter->running_cap_crqs); 4075 ibmvnic_send_crq(adapter, &crq); 4076 4077 crq.query_capability.capability = 4078 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4079 atomic_inc(&adapter->running_cap_crqs); 4080 ibmvnic_send_crq(adapter, &crq); 4081 4082 crq.query_capability.capability = 4083 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4084 atomic_inc(&adapter->running_cap_crqs); 4085 ibmvnic_send_crq(adapter, &crq); 4086 4087 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4088 atomic_inc(&adapter->running_cap_crqs); 4089 ibmvnic_send_crq(adapter, &crq); 4090 } 4091 4092 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4093 { 4094 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4095 struct device *dev = &adapter->vdev->dev; 4096 union ibmvnic_crq crq; 4097 4098 adapter->ip_offload_tok = 4099 dma_map_single(dev, 4100 &adapter->ip_offload_buf, 4101 buf_sz, 4102 DMA_FROM_DEVICE); 4103 4104 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4105 if (!firmware_has_feature(FW_FEATURE_CMO)) 4106 dev_err(dev, "Couldn't map offload buffer\n"); 4107 return; 4108 } 4109 4110 memset(&crq, 0, sizeof(crq)); 4111 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4112 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4113 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4114 crq.query_ip_offload.ioba = 4115 cpu_to_be32(adapter->ip_offload_tok); 4116 4117 ibmvnic_send_crq(adapter, &crq); 4118 } 4119 4120 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4121 { 4122 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4123 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4124 struct device *dev = &adapter->vdev->dev; 4125 netdev_features_t old_hw_features = 0; 4126 union ibmvnic_crq crq; 4127 4128 adapter->ip_offload_ctrl_tok = 4129 dma_map_single(dev, 4130 ctrl_buf, 4131 sizeof(adapter->ip_offload_ctrl), 4132 DMA_TO_DEVICE); 4133 4134 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4135 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4136 return; 4137 } 4138 4139 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4140 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4141 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4142 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4143 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4144 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4145 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4146 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4147 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4148 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4149 4150 /* large_rx disabled for now, additional features needed */ 4151 ctrl_buf->large_rx_ipv4 = 0; 4152 ctrl_buf->large_rx_ipv6 = 0; 4153 4154 if (adapter->state != VNIC_PROBING) { 4155 old_hw_features = adapter->netdev->hw_features; 4156 adapter->netdev->hw_features = 0; 4157 } 4158 4159 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4160 4161 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4162 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4163 4164 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4165 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4166 4167 if ((adapter->netdev->features & 4168 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4169 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4170 4171 if (buf->large_tx_ipv4) 4172 adapter->netdev->hw_features |= NETIF_F_TSO; 4173 if (buf->large_tx_ipv6) 4174 adapter->netdev->hw_features |= NETIF_F_TSO6; 4175 4176 if (adapter->state == VNIC_PROBING) { 4177 adapter->netdev->features |= adapter->netdev->hw_features; 4178 } else if (old_hw_features != adapter->netdev->hw_features) { 4179 netdev_features_t tmp = 0; 4180 4181 /* disable features no longer supported */ 4182 adapter->netdev->features &= adapter->netdev->hw_features; 4183 /* turn on features now supported if previously enabled */ 4184 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4185 adapter->netdev->hw_features; 4186 adapter->netdev->features |= 4187 tmp & adapter->netdev->wanted_features; 4188 } 4189 4190 memset(&crq, 0, sizeof(crq)); 4191 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4192 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4193 crq.control_ip_offload.len = 4194 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4195 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4196 ibmvnic_send_crq(adapter, &crq); 4197 } 4198 4199 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4200 struct ibmvnic_adapter *adapter) 4201 { 4202 struct device *dev = &adapter->vdev->dev; 4203 4204 if (crq->get_vpd_size_rsp.rc.code) { 4205 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4206 crq->get_vpd_size_rsp.rc.code); 4207 complete(&adapter->fw_done); 4208 return; 4209 } 4210 4211 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4212 complete(&adapter->fw_done); 4213 } 4214 4215 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4216 struct ibmvnic_adapter *adapter) 4217 { 4218 struct device *dev = &adapter->vdev->dev; 4219 unsigned char *substr = NULL; 4220 u8 fw_level_len = 0; 4221 4222 memset(adapter->fw_version, 0, 32); 4223 4224 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4225 DMA_FROM_DEVICE); 4226 4227 if (crq->get_vpd_rsp.rc.code) { 4228 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4229 crq->get_vpd_rsp.rc.code); 4230 goto complete; 4231 } 4232 4233 /* get the position of the firmware version info 4234 * located after the ASCII 'RM' substring in the buffer 4235 */ 4236 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4237 if (!substr) { 4238 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4239 goto complete; 4240 } 4241 4242 /* get length of firmware level ASCII substring */ 4243 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4244 fw_level_len = *(substr + 2); 4245 } else { 4246 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4247 goto complete; 4248 } 4249 4250 /* copy firmware version string from vpd into adapter */ 4251 if ((substr + 3 + fw_level_len) < 4252 (adapter->vpd->buff + adapter->vpd->len)) { 4253 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4254 } else { 4255 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4256 } 4257 4258 complete: 4259 if (adapter->fw_version[0] == '\0') 4260 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4261 complete(&adapter->fw_done); 4262 } 4263 4264 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4265 { 4266 struct device *dev = &adapter->vdev->dev; 4267 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4268 int i; 4269 4270 dma_unmap_single(dev, adapter->ip_offload_tok, 4271 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4272 4273 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4274 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4275 netdev_dbg(adapter->netdev, "%016lx\n", 4276 ((unsigned long *)(buf))[i]); 4277 4278 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4279 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4280 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4281 buf->tcp_ipv4_chksum); 4282 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4283 buf->tcp_ipv6_chksum); 4284 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4285 buf->udp_ipv4_chksum); 4286 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4287 buf->udp_ipv6_chksum); 4288 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4289 buf->large_tx_ipv4); 4290 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4291 buf->large_tx_ipv6); 4292 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4293 buf->large_rx_ipv4); 4294 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4295 buf->large_rx_ipv6); 4296 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4297 buf->max_ipv4_header_size); 4298 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4299 buf->max_ipv6_header_size); 4300 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4301 buf->max_tcp_header_size); 4302 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4303 buf->max_udp_header_size); 4304 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4305 buf->max_large_tx_size); 4306 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4307 buf->max_large_rx_size); 4308 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4309 buf->ipv6_extension_header); 4310 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4311 buf->tcp_pseudosum_req); 4312 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4313 buf->num_ipv6_ext_headers); 4314 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4315 buf->off_ipv6_ext_headers); 4316 4317 send_control_ip_offload(adapter); 4318 } 4319 4320 static const char *ibmvnic_fw_err_cause(u16 cause) 4321 { 4322 switch (cause) { 4323 case ADAPTER_PROBLEM: 4324 return "adapter problem"; 4325 case BUS_PROBLEM: 4326 return "bus problem"; 4327 case FW_PROBLEM: 4328 return "firmware problem"; 4329 case DD_PROBLEM: 4330 return "device driver problem"; 4331 case EEH_RECOVERY: 4332 return "EEH recovery"; 4333 case FW_UPDATED: 4334 return "firmware updated"; 4335 case LOW_MEMORY: 4336 return "low Memory"; 4337 default: 4338 return "unknown"; 4339 } 4340 } 4341 4342 static void handle_error_indication(union ibmvnic_crq *crq, 4343 struct ibmvnic_adapter *adapter) 4344 { 4345 struct device *dev = &adapter->vdev->dev; 4346 u16 cause; 4347 4348 cause = be16_to_cpu(crq->error_indication.error_cause); 4349 4350 dev_warn_ratelimited(dev, 4351 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4352 crq->error_indication.flags 4353 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4354 ibmvnic_fw_err_cause(cause)); 4355 4356 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4357 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4358 else 4359 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4360 } 4361 4362 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4363 struct ibmvnic_adapter *adapter) 4364 { 4365 struct net_device *netdev = adapter->netdev; 4366 struct device *dev = &adapter->vdev->dev; 4367 long rc; 4368 4369 rc = crq->change_mac_addr_rsp.rc.code; 4370 if (rc) { 4371 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4372 goto out; 4373 } 4374 /* crq->change_mac_addr.mac_addr is the requested one 4375 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4376 */ 4377 ether_addr_copy(netdev->dev_addr, 4378 &crq->change_mac_addr_rsp.mac_addr[0]); 4379 ether_addr_copy(adapter->mac_addr, 4380 &crq->change_mac_addr_rsp.mac_addr[0]); 4381 out: 4382 complete(&adapter->fw_done); 4383 return rc; 4384 } 4385 4386 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4387 struct ibmvnic_adapter *adapter) 4388 { 4389 struct device *dev = &adapter->vdev->dev; 4390 u64 *req_value; 4391 char *name; 4392 4393 atomic_dec(&adapter->running_cap_crqs); 4394 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4395 case REQ_TX_QUEUES: 4396 req_value = &adapter->req_tx_queues; 4397 name = "tx"; 4398 break; 4399 case REQ_RX_QUEUES: 4400 req_value = &adapter->req_rx_queues; 4401 name = "rx"; 4402 break; 4403 case REQ_RX_ADD_QUEUES: 4404 req_value = &adapter->req_rx_add_queues; 4405 name = "rx_add"; 4406 break; 4407 case REQ_TX_ENTRIES_PER_SUBCRQ: 4408 req_value = &adapter->req_tx_entries_per_subcrq; 4409 name = "tx_entries_per_subcrq"; 4410 break; 4411 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4412 req_value = &adapter->req_rx_add_entries_per_subcrq; 4413 name = "rx_add_entries_per_subcrq"; 4414 break; 4415 case REQ_MTU: 4416 req_value = &adapter->req_mtu; 4417 name = "mtu"; 4418 break; 4419 case PROMISC_REQUESTED: 4420 req_value = &adapter->promisc; 4421 name = "promisc"; 4422 break; 4423 default: 4424 dev_err(dev, "Got invalid cap request rsp %d\n", 4425 crq->request_capability.capability); 4426 return; 4427 } 4428 4429 switch (crq->request_capability_rsp.rc.code) { 4430 case SUCCESS: 4431 break; 4432 case PARTIALSUCCESS: 4433 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4434 *req_value, 4435 (long)be64_to_cpu(crq->request_capability_rsp.number), 4436 name); 4437 4438 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4439 REQ_MTU) { 4440 pr_err("mtu of %llu is not supported. Reverting.\n", 4441 *req_value); 4442 *req_value = adapter->fallback.mtu; 4443 } else { 4444 *req_value = 4445 be64_to_cpu(crq->request_capability_rsp.number); 4446 } 4447 4448 send_request_cap(adapter, 1); 4449 return; 4450 default: 4451 dev_err(dev, "Error %d in request cap rsp\n", 4452 crq->request_capability_rsp.rc.code); 4453 return; 4454 } 4455 4456 /* Done receiving requested capabilities, query IP offload support */ 4457 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4458 adapter->wait_capability = false; 4459 send_query_ip_offload(adapter); 4460 } 4461 } 4462 4463 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4464 struct ibmvnic_adapter *adapter) 4465 { 4466 struct device *dev = &adapter->vdev->dev; 4467 struct net_device *netdev = adapter->netdev; 4468 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4469 struct ibmvnic_login_buffer *login = adapter->login_buf; 4470 u64 *tx_handle_array; 4471 u64 *rx_handle_array; 4472 int num_tx_pools; 4473 int num_rx_pools; 4474 u64 *size_array; 4475 int i; 4476 4477 /* CHECK: Test/set of login_pending does not need to be atomic 4478 * because only ibmvnic_tasklet tests/clears this. 4479 */ 4480 if (!adapter->login_pending) { 4481 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4482 return 0; 4483 } 4484 adapter->login_pending = false; 4485 4486 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4487 DMA_TO_DEVICE); 4488 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4489 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4490 4491 /* If the number of queues requested can't be allocated by the 4492 * server, the login response will return with code 1. We will need 4493 * to resend the login buffer with fewer queues requested. 4494 */ 4495 if (login_rsp_crq->generic.rc.code) { 4496 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4497 complete(&adapter->init_done); 4498 return 0; 4499 } 4500 4501 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4502 4503 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4504 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4505 netdev_dbg(adapter->netdev, "%016lx\n", 4506 ((unsigned long *)(adapter->login_rsp_buf))[i]); 4507 } 4508 4509 /* Sanity checks */ 4510 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4511 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4512 adapter->req_rx_add_queues != 4513 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4514 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4515 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4516 return -EIO; 4517 } 4518 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4519 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4520 /* variable buffer sizes are not supported, so just read the 4521 * first entry. 4522 */ 4523 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4524 4525 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4526 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4527 4528 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4529 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4530 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4531 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4532 4533 for (i = 0; i < num_tx_pools; i++) 4534 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4535 4536 for (i = 0; i < num_rx_pools; i++) 4537 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4538 4539 adapter->num_active_tx_scrqs = num_tx_pools; 4540 adapter->num_active_rx_scrqs = num_rx_pools; 4541 release_login_rsp_buffer(adapter); 4542 release_login_buffer(adapter); 4543 complete(&adapter->init_done); 4544 4545 return 0; 4546 } 4547 4548 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4549 struct ibmvnic_adapter *adapter) 4550 { 4551 struct device *dev = &adapter->vdev->dev; 4552 long rc; 4553 4554 rc = crq->request_unmap_rsp.rc.code; 4555 if (rc) 4556 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4557 } 4558 4559 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4560 struct ibmvnic_adapter *adapter) 4561 { 4562 struct net_device *netdev = adapter->netdev; 4563 struct device *dev = &adapter->vdev->dev; 4564 long rc; 4565 4566 rc = crq->query_map_rsp.rc.code; 4567 if (rc) { 4568 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4569 return; 4570 } 4571 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4572 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4573 crq->query_map_rsp.free_pages); 4574 } 4575 4576 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4577 struct ibmvnic_adapter *adapter) 4578 { 4579 struct net_device *netdev = adapter->netdev; 4580 struct device *dev = &adapter->vdev->dev; 4581 long rc; 4582 4583 atomic_dec(&adapter->running_cap_crqs); 4584 netdev_dbg(netdev, "Outstanding queries: %d\n", 4585 atomic_read(&adapter->running_cap_crqs)); 4586 rc = crq->query_capability.rc.code; 4587 if (rc) { 4588 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4589 goto out; 4590 } 4591 4592 switch (be16_to_cpu(crq->query_capability.capability)) { 4593 case MIN_TX_QUEUES: 4594 adapter->min_tx_queues = 4595 be64_to_cpu(crq->query_capability.number); 4596 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4597 adapter->min_tx_queues); 4598 break; 4599 case MIN_RX_QUEUES: 4600 adapter->min_rx_queues = 4601 be64_to_cpu(crq->query_capability.number); 4602 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4603 adapter->min_rx_queues); 4604 break; 4605 case MIN_RX_ADD_QUEUES: 4606 adapter->min_rx_add_queues = 4607 be64_to_cpu(crq->query_capability.number); 4608 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4609 adapter->min_rx_add_queues); 4610 break; 4611 case MAX_TX_QUEUES: 4612 adapter->max_tx_queues = 4613 be64_to_cpu(crq->query_capability.number); 4614 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4615 adapter->max_tx_queues); 4616 break; 4617 case MAX_RX_QUEUES: 4618 adapter->max_rx_queues = 4619 be64_to_cpu(crq->query_capability.number); 4620 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4621 adapter->max_rx_queues); 4622 break; 4623 case MAX_RX_ADD_QUEUES: 4624 adapter->max_rx_add_queues = 4625 be64_to_cpu(crq->query_capability.number); 4626 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4627 adapter->max_rx_add_queues); 4628 break; 4629 case MIN_TX_ENTRIES_PER_SUBCRQ: 4630 adapter->min_tx_entries_per_subcrq = 4631 be64_to_cpu(crq->query_capability.number); 4632 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4633 adapter->min_tx_entries_per_subcrq); 4634 break; 4635 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4636 adapter->min_rx_add_entries_per_subcrq = 4637 be64_to_cpu(crq->query_capability.number); 4638 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4639 adapter->min_rx_add_entries_per_subcrq); 4640 break; 4641 case MAX_TX_ENTRIES_PER_SUBCRQ: 4642 adapter->max_tx_entries_per_subcrq = 4643 be64_to_cpu(crq->query_capability.number); 4644 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4645 adapter->max_tx_entries_per_subcrq); 4646 break; 4647 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4648 adapter->max_rx_add_entries_per_subcrq = 4649 be64_to_cpu(crq->query_capability.number); 4650 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4651 adapter->max_rx_add_entries_per_subcrq); 4652 break; 4653 case TCP_IP_OFFLOAD: 4654 adapter->tcp_ip_offload = 4655 be64_to_cpu(crq->query_capability.number); 4656 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4657 adapter->tcp_ip_offload); 4658 break; 4659 case PROMISC_SUPPORTED: 4660 adapter->promisc_supported = 4661 be64_to_cpu(crq->query_capability.number); 4662 netdev_dbg(netdev, "promisc_supported = %lld\n", 4663 adapter->promisc_supported); 4664 break; 4665 case MIN_MTU: 4666 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4667 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4668 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4669 break; 4670 case MAX_MTU: 4671 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4672 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4673 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4674 break; 4675 case MAX_MULTICAST_FILTERS: 4676 adapter->max_multicast_filters = 4677 be64_to_cpu(crq->query_capability.number); 4678 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4679 adapter->max_multicast_filters); 4680 break; 4681 case VLAN_HEADER_INSERTION: 4682 adapter->vlan_header_insertion = 4683 be64_to_cpu(crq->query_capability.number); 4684 if (adapter->vlan_header_insertion) 4685 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4686 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4687 adapter->vlan_header_insertion); 4688 break; 4689 case RX_VLAN_HEADER_INSERTION: 4690 adapter->rx_vlan_header_insertion = 4691 be64_to_cpu(crq->query_capability.number); 4692 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4693 adapter->rx_vlan_header_insertion); 4694 break; 4695 case MAX_TX_SG_ENTRIES: 4696 adapter->max_tx_sg_entries = 4697 be64_to_cpu(crq->query_capability.number); 4698 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4699 adapter->max_tx_sg_entries); 4700 break; 4701 case RX_SG_SUPPORTED: 4702 adapter->rx_sg_supported = 4703 be64_to_cpu(crq->query_capability.number); 4704 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4705 adapter->rx_sg_supported); 4706 break; 4707 case OPT_TX_COMP_SUB_QUEUES: 4708 adapter->opt_tx_comp_sub_queues = 4709 be64_to_cpu(crq->query_capability.number); 4710 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4711 adapter->opt_tx_comp_sub_queues); 4712 break; 4713 case OPT_RX_COMP_QUEUES: 4714 adapter->opt_rx_comp_queues = 4715 be64_to_cpu(crq->query_capability.number); 4716 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4717 adapter->opt_rx_comp_queues); 4718 break; 4719 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4720 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4721 be64_to_cpu(crq->query_capability.number); 4722 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4723 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4724 break; 4725 case OPT_TX_ENTRIES_PER_SUBCRQ: 4726 adapter->opt_tx_entries_per_subcrq = 4727 be64_to_cpu(crq->query_capability.number); 4728 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4729 adapter->opt_tx_entries_per_subcrq); 4730 break; 4731 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4732 adapter->opt_rxba_entries_per_subcrq = 4733 be64_to_cpu(crq->query_capability.number); 4734 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4735 adapter->opt_rxba_entries_per_subcrq); 4736 break; 4737 case TX_RX_DESC_REQ: 4738 adapter->tx_rx_desc_req = crq->query_capability.number; 4739 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4740 adapter->tx_rx_desc_req); 4741 break; 4742 4743 default: 4744 netdev_err(netdev, "Got invalid cap rsp %d\n", 4745 crq->query_capability.capability); 4746 } 4747 4748 out: 4749 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4750 adapter->wait_capability = false; 4751 send_request_cap(adapter, 0); 4752 } 4753 } 4754 4755 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4756 { 4757 union ibmvnic_crq crq; 4758 int rc; 4759 4760 memset(&crq, 0, sizeof(crq)); 4761 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4762 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4763 4764 mutex_lock(&adapter->fw_lock); 4765 adapter->fw_done_rc = 0; 4766 reinit_completion(&adapter->fw_done); 4767 4768 rc = ibmvnic_send_crq(adapter, &crq); 4769 if (rc) { 4770 mutex_unlock(&adapter->fw_lock); 4771 return rc; 4772 } 4773 4774 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4775 if (rc) { 4776 mutex_unlock(&adapter->fw_lock); 4777 return rc; 4778 } 4779 4780 mutex_unlock(&adapter->fw_lock); 4781 return adapter->fw_done_rc ? -EIO : 0; 4782 } 4783 4784 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4785 struct ibmvnic_adapter *adapter) 4786 { 4787 struct net_device *netdev = adapter->netdev; 4788 int rc; 4789 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4790 4791 rc = crq->query_phys_parms_rsp.rc.code; 4792 if (rc) { 4793 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4794 return rc; 4795 } 4796 switch (rspeed) { 4797 case IBMVNIC_10MBPS: 4798 adapter->speed = SPEED_10; 4799 break; 4800 case IBMVNIC_100MBPS: 4801 adapter->speed = SPEED_100; 4802 break; 4803 case IBMVNIC_1GBPS: 4804 adapter->speed = SPEED_1000; 4805 break; 4806 case IBMVNIC_10GBPS: 4807 adapter->speed = SPEED_10000; 4808 break; 4809 case IBMVNIC_25GBPS: 4810 adapter->speed = SPEED_25000; 4811 break; 4812 case IBMVNIC_40GBPS: 4813 adapter->speed = SPEED_40000; 4814 break; 4815 case IBMVNIC_50GBPS: 4816 adapter->speed = SPEED_50000; 4817 break; 4818 case IBMVNIC_100GBPS: 4819 adapter->speed = SPEED_100000; 4820 break; 4821 case IBMVNIC_200GBPS: 4822 adapter->speed = SPEED_200000; 4823 break; 4824 default: 4825 if (netif_carrier_ok(netdev)) 4826 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4827 adapter->speed = SPEED_UNKNOWN; 4828 } 4829 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4830 adapter->duplex = DUPLEX_FULL; 4831 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4832 adapter->duplex = DUPLEX_HALF; 4833 else 4834 adapter->duplex = DUPLEX_UNKNOWN; 4835 4836 return rc; 4837 } 4838 4839 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4840 struct ibmvnic_adapter *adapter) 4841 { 4842 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4843 struct net_device *netdev = adapter->netdev; 4844 struct device *dev = &adapter->vdev->dev; 4845 u64 *u64_crq = (u64 *)crq; 4846 long rc; 4847 4848 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4849 (unsigned long)cpu_to_be64(u64_crq[0]), 4850 (unsigned long)cpu_to_be64(u64_crq[1])); 4851 switch (gen_crq->first) { 4852 case IBMVNIC_CRQ_INIT_RSP: 4853 switch (gen_crq->cmd) { 4854 case IBMVNIC_CRQ_INIT: 4855 dev_info(dev, "Partner initialized\n"); 4856 adapter->from_passive_init = true; 4857 /* Discard any stale login responses from prev reset. 4858 * CHECK: should we clear even on INIT_COMPLETE? 4859 */ 4860 adapter->login_pending = false; 4861 4862 if (!completion_done(&adapter->init_done)) { 4863 complete(&adapter->init_done); 4864 adapter->init_done_rc = -EIO; 4865 } 4866 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4867 if (rc && rc != -EBUSY) { 4868 /* We were unable to schedule the failover 4869 * reset either because the adapter was still 4870 * probing (eg: during kexec) or we could not 4871 * allocate memory. Clear the failover_pending 4872 * flag since no one else will. We ignore 4873 * EBUSY because it means either FAILOVER reset 4874 * is already scheduled or the adapter is 4875 * being removed. 4876 */ 4877 netdev_err(netdev, 4878 "Error %ld scheduling failover reset\n", 4879 rc); 4880 adapter->failover_pending = false; 4881 } 4882 break; 4883 case IBMVNIC_CRQ_INIT_COMPLETE: 4884 dev_info(dev, "Partner initialization complete\n"); 4885 adapter->crq.active = true; 4886 send_version_xchg(adapter); 4887 break; 4888 default: 4889 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4890 } 4891 return; 4892 case IBMVNIC_CRQ_XPORT_EVENT: 4893 netif_carrier_off(netdev); 4894 adapter->crq.active = false; 4895 /* terminate any thread waiting for a response 4896 * from the device 4897 */ 4898 if (!completion_done(&adapter->fw_done)) { 4899 adapter->fw_done_rc = -EIO; 4900 complete(&adapter->fw_done); 4901 } 4902 if (!completion_done(&adapter->stats_done)) 4903 complete(&adapter->stats_done); 4904 if (test_bit(0, &adapter->resetting)) 4905 adapter->force_reset_recovery = true; 4906 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4907 dev_info(dev, "Migrated, re-enabling adapter\n"); 4908 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4909 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4910 dev_info(dev, "Backing device failover detected\n"); 4911 adapter->failover_pending = true; 4912 } else { 4913 /* The adapter lost the connection */ 4914 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4915 gen_crq->cmd); 4916 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4917 } 4918 return; 4919 case IBMVNIC_CRQ_CMD_RSP: 4920 break; 4921 default: 4922 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4923 gen_crq->first); 4924 return; 4925 } 4926 4927 switch (gen_crq->cmd) { 4928 case VERSION_EXCHANGE_RSP: 4929 rc = crq->version_exchange_rsp.rc.code; 4930 if (rc) { 4931 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4932 break; 4933 } 4934 ibmvnic_version = 4935 be16_to_cpu(crq->version_exchange_rsp.version); 4936 dev_info(dev, "Partner protocol version is %d\n", 4937 ibmvnic_version); 4938 send_query_cap(adapter); 4939 break; 4940 case QUERY_CAPABILITY_RSP: 4941 handle_query_cap_rsp(crq, adapter); 4942 break; 4943 case QUERY_MAP_RSP: 4944 handle_query_map_rsp(crq, adapter); 4945 break; 4946 case REQUEST_MAP_RSP: 4947 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4948 complete(&adapter->fw_done); 4949 break; 4950 case REQUEST_UNMAP_RSP: 4951 handle_request_unmap_rsp(crq, adapter); 4952 break; 4953 case REQUEST_CAPABILITY_RSP: 4954 handle_request_cap_rsp(crq, adapter); 4955 break; 4956 case LOGIN_RSP: 4957 netdev_dbg(netdev, "Got Login Response\n"); 4958 handle_login_rsp(crq, adapter); 4959 break; 4960 case LOGICAL_LINK_STATE_RSP: 4961 netdev_dbg(netdev, 4962 "Got Logical Link State Response, state: %d rc: %d\n", 4963 crq->logical_link_state_rsp.link_state, 4964 crq->logical_link_state_rsp.rc.code); 4965 adapter->logical_link_state = 4966 crq->logical_link_state_rsp.link_state; 4967 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4968 complete(&adapter->init_done); 4969 break; 4970 case LINK_STATE_INDICATION: 4971 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4972 adapter->phys_link_state = 4973 crq->link_state_indication.phys_link_state; 4974 adapter->logical_link_state = 4975 crq->link_state_indication.logical_link_state; 4976 if (adapter->phys_link_state && adapter->logical_link_state) 4977 netif_carrier_on(netdev); 4978 else 4979 netif_carrier_off(netdev); 4980 break; 4981 case CHANGE_MAC_ADDR_RSP: 4982 netdev_dbg(netdev, "Got MAC address change Response\n"); 4983 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4984 break; 4985 case ERROR_INDICATION: 4986 netdev_dbg(netdev, "Got Error Indication\n"); 4987 handle_error_indication(crq, adapter); 4988 break; 4989 case REQUEST_STATISTICS_RSP: 4990 netdev_dbg(netdev, "Got Statistics Response\n"); 4991 complete(&adapter->stats_done); 4992 break; 4993 case QUERY_IP_OFFLOAD_RSP: 4994 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4995 handle_query_ip_offload_rsp(adapter); 4996 break; 4997 case MULTICAST_CTRL_RSP: 4998 netdev_dbg(netdev, "Got multicast control Response\n"); 4999 break; 5000 case CONTROL_IP_OFFLOAD_RSP: 5001 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5002 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5003 sizeof(adapter->ip_offload_ctrl), 5004 DMA_TO_DEVICE); 5005 complete(&adapter->init_done); 5006 break; 5007 case COLLECT_FW_TRACE_RSP: 5008 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5009 complete(&adapter->fw_done); 5010 break; 5011 case GET_VPD_SIZE_RSP: 5012 handle_vpd_size_rsp(crq, adapter); 5013 break; 5014 case GET_VPD_RSP: 5015 handle_vpd_rsp(crq, adapter); 5016 break; 5017 case QUERY_PHYS_PARMS_RSP: 5018 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5019 complete(&adapter->fw_done); 5020 break; 5021 default: 5022 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5023 gen_crq->cmd); 5024 } 5025 } 5026 5027 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5028 { 5029 struct ibmvnic_adapter *adapter = instance; 5030 5031 tasklet_schedule(&adapter->tasklet); 5032 return IRQ_HANDLED; 5033 } 5034 5035 static void ibmvnic_tasklet(struct tasklet_struct *t) 5036 { 5037 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5038 struct ibmvnic_crq_queue *queue = &adapter->crq; 5039 union ibmvnic_crq *crq; 5040 unsigned long flags; 5041 bool done = false; 5042 5043 spin_lock_irqsave(&queue->lock, flags); 5044 while (!done) { 5045 /* Pull all the valid messages off the CRQ */ 5046 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5047 /* This barrier makes sure ibmvnic_next_crq()'s 5048 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5049 * before ibmvnic_handle_crq()'s 5050 * switch(gen_crq->first) and switch(gen_crq->cmd). 5051 */ 5052 dma_rmb(); 5053 ibmvnic_handle_crq(crq, adapter); 5054 crq->generic.first = 0; 5055 } 5056 5057 /* remain in tasklet until all 5058 * capabilities responses are received 5059 */ 5060 if (!adapter->wait_capability) 5061 done = true; 5062 } 5063 /* if capabilities CRQ's were sent in this tasklet, the following 5064 * tasklet must wait until all responses are received 5065 */ 5066 if (atomic_read(&adapter->running_cap_crqs) != 0) 5067 adapter->wait_capability = true; 5068 spin_unlock_irqrestore(&queue->lock, flags); 5069 } 5070 5071 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5072 { 5073 struct vio_dev *vdev = adapter->vdev; 5074 int rc; 5075 5076 do { 5077 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5078 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5079 5080 if (rc) 5081 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5082 5083 return rc; 5084 } 5085 5086 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5087 { 5088 struct ibmvnic_crq_queue *crq = &adapter->crq; 5089 struct device *dev = &adapter->vdev->dev; 5090 struct vio_dev *vdev = adapter->vdev; 5091 int rc; 5092 5093 /* Close the CRQ */ 5094 do { 5095 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5096 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5097 5098 /* Clean out the queue */ 5099 if (!crq->msgs) 5100 return -EINVAL; 5101 5102 memset(crq->msgs, 0, PAGE_SIZE); 5103 crq->cur = 0; 5104 crq->active = false; 5105 5106 /* And re-open it again */ 5107 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5108 crq->msg_token, PAGE_SIZE); 5109 5110 if (rc == H_CLOSED) 5111 /* Adapter is good, but other end is not ready */ 5112 dev_warn(dev, "Partner adapter not ready\n"); 5113 else if (rc != 0) 5114 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5115 5116 return rc; 5117 } 5118 5119 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5120 { 5121 struct ibmvnic_crq_queue *crq = &adapter->crq; 5122 struct vio_dev *vdev = adapter->vdev; 5123 long rc; 5124 5125 if (!crq->msgs) 5126 return; 5127 5128 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5129 free_irq(vdev->irq, adapter); 5130 tasklet_kill(&adapter->tasklet); 5131 do { 5132 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5133 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5134 5135 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5136 DMA_BIDIRECTIONAL); 5137 free_page((unsigned long)crq->msgs); 5138 crq->msgs = NULL; 5139 crq->active = false; 5140 } 5141 5142 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5143 { 5144 struct ibmvnic_crq_queue *crq = &adapter->crq; 5145 struct device *dev = &adapter->vdev->dev; 5146 struct vio_dev *vdev = adapter->vdev; 5147 int rc, retrc = -ENOMEM; 5148 5149 if (crq->msgs) 5150 return 0; 5151 5152 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5153 /* Should we allocate more than one page? */ 5154 5155 if (!crq->msgs) 5156 return -ENOMEM; 5157 5158 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5159 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5160 DMA_BIDIRECTIONAL); 5161 if (dma_mapping_error(dev, crq->msg_token)) 5162 goto map_failed; 5163 5164 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5165 crq->msg_token, PAGE_SIZE); 5166 5167 if (rc == H_RESOURCE) 5168 /* maybe kexecing and resource is busy. try a reset */ 5169 rc = ibmvnic_reset_crq(adapter); 5170 retrc = rc; 5171 5172 if (rc == H_CLOSED) { 5173 dev_warn(dev, "Partner adapter not ready\n"); 5174 } else if (rc) { 5175 dev_warn(dev, "Error %d opening adapter\n", rc); 5176 goto reg_crq_failed; 5177 } 5178 5179 retrc = 0; 5180 5181 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5182 5183 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5184 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5185 adapter->vdev->unit_address); 5186 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5187 if (rc) { 5188 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5189 vdev->irq, rc); 5190 goto req_irq_failed; 5191 } 5192 5193 rc = vio_enable_interrupts(vdev); 5194 if (rc) { 5195 dev_err(dev, "Error %d enabling interrupts\n", rc); 5196 goto req_irq_failed; 5197 } 5198 5199 crq->cur = 0; 5200 spin_lock_init(&crq->lock); 5201 5202 return retrc; 5203 5204 req_irq_failed: 5205 tasklet_kill(&adapter->tasklet); 5206 do { 5207 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5208 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5209 reg_crq_failed: 5210 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5211 map_failed: 5212 free_page((unsigned long)crq->msgs); 5213 crq->msgs = NULL; 5214 return retrc; 5215 } 5216 5217 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5218 { 5219 struct device *dev = &adapter->vdev->dev; 5220 unsigned long timeout = msecs_to_jiffies(20000); 5221 u64 old_num_rx_queues, old_num_tx_queues; 5222 int rc; 5223 5224 adapter->from_passive_init = false; 5225 5226 if (reset) { 5227 old_num_rx_queues = adapter->req_rx_queues; 5228 old_num_tx_queues = adapter->req_tx_queues; 5229 reinit_completion(&adapter->init_done); 5230 } 5231 5232 adapter->init_done_rc = 0; 5233 rc = ibmvnic_send_crq_init(adapter); 5234 if (rc) { 5235 dev_err(dev, "Send crq init failed with error %d\n", rc); 5236 return rc; 5237 } 5238 5239 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5240 dev_err(dev, "Initialization sequence timed out\n"); 5241 return -1; 5242 } 5243 5244 if (adapter->init_done_rc) { 5245 release_crq_queue(adapter); 5246 return adapter->init_done_rc; 5247 } 5248 5249 if (adapter->from_passive_init) { 5250 adapter->state = VNIC_OPEN; 5251 adapter->from_passive_init = false; 5252 return -1; 5253 } 5254 5255 if (reset && 5256 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5257 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5258 if (adapter->req_rx_queues != old_num_rx_queues || 5259 adapter->req_tx_queues != old_num_tx_queues) { 5260 release_sub_crqs(adapter, 0); 5261 rc = init_sub_crqs(adapter); 5262 } else { 5263 rc = reset_sub_crq_queues(adapter); 5264 } 5265 } else { 5266 rc = init_sub_crqs(adapter); 5267 } 5268 5269 if (rc) { 5270 dev_err(dev, "Initialization of sub crqs failed\n"); 5271 release_crq_queue(adapter); 5272 return rc; 5273 } 5274 5275 rc = init_sub_crq_irqs(adapter); 5276 if (rc) { 5277 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5278 release_crq_queue(adapter); 5279 } 5280 5281 return rc; 5282 } 5283 5284 static struct device_attribute dev_attr_failover; 5285 5286 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5287 { 5288 struct ibmvnic_adapter *adapter; 5289 struct net_device *netdev; 5290 unsigned char *mac_addr_p; 5291 int rc; 5292 5293 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5294 dev->unit_address); 5295 5296 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5297 VETH_MAC_ADDR, NULL); 5298 if (!mac_addr_p) { 5299 dev_err(&dev->dev, 5300 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5301 __FILE__, __LINE__); 5302 return 0; 5303 } 5304 5305 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5306 IBMVNIC_MAX_QUEUES); 5307 if (!netdev) 5308 return -ENOMEM; 5309 5310 adapter = netdev_priv(netdev); 5311 adapter->state = VNIC_PROBING; 5312 dev_set_drvdata(&dev->dev, netdev); 5313 adapter->vdev = dev; 5314 adapter->netdev = netdev; 5315 adapter->login_pending = false; 5316 5317 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5318 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5319 netdev->irq = dev->irq; 5320 netdev->netdev_ops = &ibmvnic_netdev_ops; 5321 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5322 SET_NETDEV_DEV(netdev, &dev->dev); 5323 5324 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5325 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5326 __ibmvnic_delayed_reset); 5327 INIT_LIST_HEAD(&adapter->rwi_list); 5328 spin_lock_init(&adapter->rwi_lock); 5329 spin_lock_init(&adapter->state_lock); 5330 mutex_init(&adapter->fw_lock); 5331 init_completion(&adapter->init_done); 5332 init_completion(&adapter->fw_done); 5333 init_completion(&adapter->reset_done); 5334 init_completion(&adapter->stats_done); 5335 clear_bit(0, &adapter->resetting); 5336 5337 do { 5338 rc = init_crq_queue(adapter); 5339 if (rc) { 5340 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5341 rc); 5342 goto ibmvnic_init_fail; 5343 } 5344 5345 rc = ibmvnic_reset_init(adapter, false); 5346 if (rc && rc != EAGAIN) 5347 goto ibmvnic_init_fail; 5348 } while (rc == EAGAIN); 5349 5350 rc = init_stats_buffers(adapter); 5351 if (rc) 5352 goto ibmvnic_init_fail; 5353 5354 rc = init_stats_token(adapter); 5355 if (rc) 5356 goto ibmvnic_stats_fail; 5357 5358 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5359 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5360 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5361 5362 rc = device_create_file(&dev->dev, &dev_attr_failover); 5363 if (rc) 5364 goto ibmvnic_dev_file_err; 5365 5366 netif_carrier_off(netdev); 5367 rc = register_netdev(netdev); 5368 if (rc) { 5369 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5370 goto ibmvnic_register_fail; 5371 } 5372 dev_info(&dev->dev, "ibmvnic registered\n"); 5373 5374 adapter->state = VNIC_PROBED; 5375 5376 adapter->wait_for_reset = false; 5377 adapter->last_reset_time = jiffies; 5378 return 0; 5379 5380 ibmvnic_register_fail: 5381 device_remove_file(&dev->dev, &dev_attr_failover); 5382 5383 ibmvnic_dev_file_err: 5384 release_stats_token(adapter); 5385 5386 ibmvnic_stats_fail: 5387 release_stats_buffers(adapter); 5388 5389 ibmvnic_init_fail: 5390 release_sub_crqs(adapter, 1); 5391 release_crq_queue(adapter); 5392 mutex_destroy(&adapter->fw_lock); 5393 free_netdev(netdev); 5394 5395 return rc; 5396 } 5397 5398 static void ibmvnic_remove(struct vio_dev *dev) 5399 { 5400 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5401 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5402 unsigned long flags; 5403 5404 spin_lock_irqsave(&adapter->state_lock, flags); 5405 5406 /* If ibmvnic_reset() is scheduling a reset, wait for it to 5407 * finish. Then, set the state to REMOVING to prevent it from 5408 * scheduling any more work and to have reset functions ignore 5409 * any resets that have already been scheduled. Drop the lock 5410 * after setting state, so __ibmvnic_reset() which is called 5411 * from the flush_work() below, can make progress. 5412 */ 5413 spin_lock_irqsave(&adapter->rwi_lock, flags); 5414 adapter->state = VNIC_REMOVING; 5415 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 5416 5417 spin_unlock_irqrestore(&adapter->state_lock, flags); 5418 5419 flush_work(&adapter->ibmvnic_reset); 5420 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5421 5422 rtnl_lock(); 5423 unregister_netdevice(netdev); 5424 5425 release_resources(adapter); 5426 release_sub_crqs(adapter, 1); 5427 release_crq_queue(adapter); 5428 5429 release_stats_token(adapter); 5430 release_stats_buffers(adapter); 5431 5432 adapter->state = VNIC_REMOVED; 5433 5434 rtnl_unlock(); 5435 mutex_destroy(&adapter->fw_lock); 5436 device_remove_file(&dev->dev, &dev_attr_failover); 5437 free_netdev(netdev); 5438 dev_set_drvdata(&dev->dev, NULL); 5439 } 5440 5441 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5442 const char *buf, size_t count) 5443 { 5444 struct net_device *netdev = dev_get_drvdata(dev); 5445 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5446 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5447 __be64 session_token; 5448 long rc; 5449 5450 if (!sysfs_streq(buf, "1")) 5451 return -EINVAL; 5452 5453 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5454 H_GET_SESSION_TOKEN, 0, 0, 0); 5455 if (rc) { 5456 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5457 rc); 5458 return -EINVAL; 5459 } 5460 5461 session_token = (__be64)retbuf[0]; 5462 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5463 be64_to_cpu(session_token)); 5464 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5465 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5466 if (rc) { 5467 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5468 rc); 5469 return -EINVAL; 5470 } 5471 5472 return count; 5473 } 5474 5475 static DEVICE_ATTR_WO(failover); 5476 5477 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5478 { 5479 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5480 struct ibmvnic_adapter *adapter; 5481 struct iommu_table *tbl; 5482 unsigned long ret = 0; 5483 int i; 5484 5485 tbl = get_iommu_table_base(&vdev->dev); 5486 5487 /* netdev inits at probe time along with the structures we need below*/ 5488 if (!netdev) 5489 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5490 5491 adapter = netdev_priv(netdev); 5492 5493 ret += PAGE_SIZE; /* the crq message queue */ 5494 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5495 5496 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5497 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5498 5499 for (i = 0; i < adapter->num_active_rx_pools; i++) 5500 ret += adapter->rx_pool[i].size * 5501 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5502 5503 return ret; 5504 } 5505 5506 static int ibmvnic_resume(struct device *dev) 5507 { 5508 struct net_device *netdev = dev_get_drvdata(dev); 5509 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5510 5511 if (adapter->state != VNIC_OPEN) 5512 return 0; 5513 5514 tasklet_schedule(&adapter->tasklet); 5515 5516 return 0; 5517 } 5518 5519 static const struct vio_device_id ibmvnic_device_table[] = { 5520 {"network", "IBM,vnic"}, 5521 {"", "" } 5522 }; 5523 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5524 5525 static const struct dev_pm_ops ibmvnic_pm_ops = { 5526 .resume = ibmvnic_resume 5527 }; 5528 5529 static struct vio_driver ibmvnic_driver = { 5530 .id_table = ibmvnic_device_table, 5531 .probe = ibmvnic_probe, 5532 .remove = ibmvnic_remove, 5533 .get_desired_dma = ibmvnic_get_desired_dma, 5534 .name = ibmvnic_driver_name, 5535 .pm = &ibmvnic_pm_ops, 5536 }; 5537 5538 /* module functions */ 5539 static int __init ibmvnic_module_init(void) 5540 { 5541 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5542 IBMVNIC_DRIVER_VERSION); 5543 5544 return vio_register_driver(&ibmvnic_driver); 5545 } 5546 5547 static void __exit ibmvnic_module_exit(void) 5548 { 5549 vio_unregister_driver(&ibmvnic_driver); 5550 } 5551 5552 module_init(ibmvnic_module_init); 5553 module_exit(ibmvnic_module_exit); 5554