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