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 const char *adapter_state_to_string(enum vnic_state state) 831 { 832 switch (state) { 833 case VNIC_PROBING: 834 return "PROBING"; 835 case VNIC_PROBED: 836 return "PROBED"; 837 case VNIC_OPENING: 838 return "OPENING"; 839 case VNIC_OPEN: 840 return "OPEN"; 841 case VNIC_CLOSING: 842 return "CLOSING"; 843 case VNIC_CLOSED: 844 return "CLOSED"; 845 case VNIC_REMOVING: 846 return "REMOVING"; 847 case VNIC_REMOVED: 848 return "REMOVED"; 849 default: 850 return "UNKNOWN"; 851 } 852 } 853 854 static int ibmvnic_login(struct net_device *netdev) 855 { 856 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 857 unsigned long timeout = msecs_to_jiffies(20000); 858 int retry_count = 0; 859 int retries = 10; 860 bool retry; 861 int rc; 862 863 do { 864 retry = false; 865 if (retry_count > retries) { 866 netdev_warn(netdev, "Login attempts exceeded\n"); 867 return -1; 868 } 869 870 adapter->init_done_rc = 0; 871 reinit_completion(&adapter->init_done); 872 rc = send_login(adapter); 873 if (rc) 874 return rc; 875 876 if (!wait_for_completion_timeout(&adapter->init_done, 877 timeout)) { 878 netdev_warn(netdev, "Login timed out, retrying...\n"); 879 retry = true; 880 adapter->init_done_rc = 0; 881 retry_count++; 882 continue; 883 } 884 885 if (adapter->init_done_rc == ABORTED) { 886 netdev_warn(netdev, "Login aborted, retrying...\n"); 887 retry = true; 888 adapter->init_done_rc = 0; 889 retry_count++; 890 /* FW or device may be busy, so 891 * wait a bit before retrying login 892 */ 893 msleep(500); 894 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 895 retry_count++; 896 release_sub_crqs(adapter, 1); 897 898 retry = true; 899 netdev_dbg(netdev, 900 "Received partial success, retrying...\n"); 901 adapter->init_done_rc = 0; 902 reinit_completion(&adapter->init_done); 903 send_query_cap(adapter); 904 if (!wait_for_completion_timeout(&adapter->init_done, 905 timeout)) { 906 netdev_warn(netdev, 907 "Capabilities query timed out\n"); 908 return -1; 909 } 910 911 rc = init_sub_crqs(adapter); 912 if (rc) { 913 netdev_warn(netdev, 914 "SCRQ initialization failed\n"); 915 return -1; 916 } 917 918 rc = init_sub_crq_irqs(adapter); 919 if (rc) { 920 netdev_warn(netdev, 921 "SCRQ irq initialization failed\n"); 922 return -1; 923 } 924 } else if (adapter->init_done_rc) { 925 netdev_warn(netdev, "Adapter login failed\n"); 926 return -1; 927 } 928 } while (retry); 929 930 __ibmvnic_set_mac(netdev, adapter->mac_addr); 931 932 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 933 return 0; 934 } 935 936 static void release_login_buffer(struct ibmvnic_adapter *adapter) 937 { 938 kfree(adapter->login_buf); 939 adapter->login_buf = NULL; 940 } 941 942 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 943 { 944 kfree(adapter->login_rsp_buf); 945 adapter->login_rsp_buf = NULL; 946 } 947 948 static void release_resources(struct ibmvnic_adapter *adapter) 949 { 950 release_vpd_data(adapter); 951 952 release_tx_pools(adapter); 953 release_rx_pools(adapter); 954 955 release_napi(adapter); 956 release_login_buffer(adapter); 957 release_login_rsp_buffer(adapter); 958 } 959 960 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 961 { 962 struct net_device *netdev = adapter->netdev; 963 unsigned long timeout = msecs_to_jiffies(20000); 964 union ibmvnic_crq crq; 965 bool resend; 966 int rc; 967 968 netdev_dbg(netdev, "setting link state %d\n", link_state); 969 970 memset(&crq, 0, sizeof(crq)); 971 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 972 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 973 crq.logical_link_state.link_state = link_state; 974 975 do { 976 resend = false; 977 978 reinit_completion(&adapter->init_done); 979 rc = ibmvnic_send_crq(adapter, &crq); 980 if (rc) { 981 netdev_err(netdev, "Failed to set link state\n"); 982 return rc; 983 } 984 985 if (!wait_for_completion_timeout(&adapter->init_done, 986 timeout)) { 987 netdev_err(netdev, "timeout setting link state\n"); 988 return -1; 989 } 990 991 if (adapter->init_done_rc == PARTIALSUCCESS) { 992 /* Partuial success, delay and re-send */ 993 mdelay(1000); 994 resend = true; 995 } else if (adapter->init_done_rc) { 996 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 997 adapter->init_done_rc); 998 return adapter->init_done_rc; 999 } 1000 } while (resend); 1001 1002 return 0; 1003 } 1004 1005 static int set_real_num_queues(struct net_device *netdev) 1006 { 1007 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1008 int rc; 1009 1010 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1011 adapter->req_tx_queues, adapter->req_rx_queues); 1012 1013 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1014 if (rc) { 1015 netdev_err(netdev, "failed to set the number of tx queues\n"); 1016 return rc; 1017 } 1018 1019 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1020 if (rc) 1021 netdev_err(netdev, "failed to set the number of rx queues\n"); 1022 1023 return rc; 1024 } 1025 1026 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1027 { 1028 struct device *dev = &adapter->vdev->dev; 1029 union ibmvnic_crq crq; 1030 int len = 0; 1031 int rc; 1032 1033 if (adapter->vpd->buff) 1034 len = adapter->vpd->len; 1035 1036 mutex_lock(&adapter->fw_lock); 1037 adapter->fw_done_rc = 0; 1038 reinit_completion(&adapter->fw_done); 1039 1040 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1041 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1042 rc = ibmvnic_send_crq(adapter, &crq); 1043 if (rc) { 1044 mutex_unlock(&adapter->fw_lock); 1045 return rc; 1046 } 1047 1048 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1049 if (rc) { 1050 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1051 mutex_unlock(&adapter->fw_lock); 1052 return rc; 1053 } 1054 mutex_unlock(&adapter->fw_lock); 1055 1056 if (!adapter->vpd->len) 1057 return -ENODATA; 1058 1059 if (!adapter->vpd->buff) 1060 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1061 else if (adapter->vpd->len != len) 1062 adapter->vpd->buff = 1063 krealloc(adapter->vpd->buff, 1064 adapter->vpd->len, GFP_KERNEL); 1065 1066 if (!adapter->vpd->buff) { 1067 dev_err(dev, "Could allocate VPD buffer\n"); 1068 return -ENOMEM; 1069 } 1070 1071 adapter->vpd->dma_addr = 1072 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1073 DMA_FROM_DEVICE); 1074 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1075 dev_err(dev, "Could not map VPD buffer\n"); 1076 kfree(adapter->vpd->buff); 1077 adapter->vpd->buff = NULL; 1078 return -ENOMEM; 1079 } 1080 1081 mutex_lock(&adapter->fw_lock); 1082 adapter->fw_done_rc = 0; 1083 reinit_completion(&adapter->fw_done); 1084 1085 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1086 crq.get_vpd.cmd = GET_VPD; 1087 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1088 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1089 rc = ibmvnic_send_crq(adapter, &crq); 1090 if (rc) { 1091 kfree(adapter->vpd->buff); 1092 adapter->vpd->buff = NULL; 1093 mutex_unlock(&adapter->fw_lock); 1094 return rc; 1095 } 1096 1097 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1098 if (rc) { 1099 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1100 kfree(adapter->vpd->buff); 1101 adapter->vpd->buff = NULL; 1102 mutex_unlock(&adapter->fw_lock); 1103 return rc; 1104 } 1105 1106 mutex_unlock(&adapter->fw_lock); 1107 return 0; 1108 } 1109 1110 static int init_resources(struct ibmvnic_adapter *adapter) 1111 { 1112 struct net_device *netdev = adapter->netdev; 1113 int rc; 1114 1115 rc = set_real_num_queues(netdev); 1116 if (rc) 1117 return rc; 1118 1119 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1120 if (!adapter->vpd) 1121 return -ENOMEM; 1122 1123 /* Vital Product Data (VPD) */ 1124 rc = ibmvnic_get_vpd(adapter); 1125 if (rc) { 1126 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1127 return rc; 1128 } 1129 1130 adapter->map_id = 1; 1131 1132 rc = init_napi(adapter); 1133 if (rc) 1134 return rc; 1135 1136 send_query_map(adapter); 1137 1138 rc = init_rx_pools(netdev); 1139 if (rc) 1140 return rc; 1141 1142 rc = init_tx_pools(netdev); 1143 return rc; 1144 } 1145 1146 static int __ibmvnic_open(struct net_device *netdev) 1147 { 1148 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1149 enum vnic_state prev_state = adapter->state; 1150 int i, rc; 1151 1152 adapter->state = VNIC_OPENING; 1153 replenish_pools(adapter); 1154 ibmvnic_napi_enable(adapter); 1155 1156 /* We're ready to receive frames, enable the sub-crq interrupts and 1157 * set the logical link state to up 1158 */ 1159 for (i = 0; i < adapter->req_rx_queues; i++) { 1160 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1161 if (prev_state == VNIC_CLOSED) 1162 enable_irq(adapter->rx_scrq[i]->irq); 1163 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1164 } 1165 1166 for (i = 0; i < adapter->req_tx_queues; i++) { 1167 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1168 if (prev_state == VNIC_CLOSED) 1169 enable_irq(adapter->tx_scrq[i]->irq); 1170 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1171 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1172 } 1173 1174 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1175 if (rc) { 1176 ibmvnic_napi_disable(adapter); 1177 release_resources(adapter); 1178 return rc; 1179 } 1180 1181 netif_tx_start_all_queues(netdev); 1182 1183 adapter->state = VNIC_OPEN; 1184 return rc; 1185 } 1186 1187 static int ibmvnic_open(struct net_device *netdev) 1188 { 1189 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1190 int rc; 1191 1192 ASSERT_RTNL(); 1193 1194 /* If device failover is pending or we are about to reset, just set 1195 * device state and return. Device operation will be handled by reset 1196 * routine. 1197 * 1198 * It should be safe to overwrite the adapter->state here. Since 1199 * we hold the rtnl, either the reset has not actually started or 1200 * the rtnl got dropped during the set_link_state() in do_reset(). 1201 * In the former case, no one else is changing the state (again we 1202 * have the rtnl) and in the latter case, do_reset() will detect and 1203 * honor our setting below. 1204 */ 1205 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1206 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1207 adapter_state_to_string(adapter->state), 1208 adapter->failover_pending); 1209 adapter->state = VNIC_OPEN; 1210 rc = 0; 1211 goto out; 1212 } 1213 1214 if (adapter->state != VNIC_CLOSED) { 1215 rc = ibmvnic_login(netdev); 1216 if (rc) 1217 goto out; 1218 1219 rc = init_resources(adapter); 1220 if (rc) { 1221 netdev_err(netdev, "failed to initialize resources\n"); 1222 release_resources(adapter); 1223 goto out; 1224 } 1225 } 1226 1227 rc = __ibmvnic_open(netdev); 1228 1229 out: 1230 /* If open failed and there is a pending failover or in-progress reset, 1231 * set device state and return. Device operation will be handled by 1232 * reset routine. See also comments above regarding rtnl. 1233 */ 1234 if (rc && 1235 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1236 adapter->state = VNIC_OPEN; 1237 rc = 0; 1238 } 1239 return rc; 1240 } 1241 1242 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1243 { 1244 struct ibmvnic_rx_pool *rx_pool; 1245 struct ibmvnic_rx_buff *rx_buff; 1246 u64 rx_entries; 1247 int rx_scrqs; 1248 int i, j; 1249 1250 if (!adapter->rx_pool) 1251 return; 1252 1253 rx_scrqs = adapter->num_active_rx_pools; 1254 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1255 1256 /* Free any remaining skbs in the rx buffer pools */ 1257 for (i = 0; i < rx_scrqs; i++) { 1258 rx_pool = &adapter->rx_pool[i]; 1259 if (!rx_pool || !rx_pool->rx_buff) 1260 continue; 1261 1262 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1263 for (j = 0; j < rx_entries; j++) { 1264 rx_buff = &rx_pool->rx_buff[j]; 1265 if (rx_buff && rx_buff->skb) { 1266 dev_kfree_skb_any(rx_buff->skb); 1267 rx_buff->skb = NULL; 1268 } 1269 } 1270 } 1271 } 1272 1273 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1274 struct ibmvnic_tx_pool *tx_pool) 1275 { 1276 struct ibmvnic_tx_buff *tx_buff; 1277 u64 tx_entries; 1278 int i; 1279 1280 if (!tx_pool || !tx_pool->tx_buff) 1281 return; 1282 1283 tx_entries = tx_pool->num_buffers; 1284 1285 for (i = 0; i < tx_entries; i++) { 1286 tx_buff = &tx_pool->tx_buff[i]; 1287 if (tx_buff && tx_buff->skb) { 1288 dev_kfree_skb_any(tx_buff->skb); 1289 tx_buff->skb = NULL; 1290 } 1291 } 1292 } 1293 1294 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1295 { 1296 int tx_scrqs; 1297 int i; 1298 1299 if (!adapter->tx_pool || !adapter->tso_pool) 1300 return; 1301 1302 tx_scrqs = adapter->num_active_tx_pools; 1303 1304 /* Free any remaining skbs in the tx buffer pools */ 1305 for (i = 0; i < tx_scrqs; i++) { 1306 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1307 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1308 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1309 } 1310 } 1311 1312 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1313 { 1314 struct net_device *netdev = adapter->netdev; 1315 int i; 1316 1317 if (adapter->tx_scrq) { 1318 for (i = 0; i < adapter->req_tx_queues; i++) 1319 if (adapter->tx_scrq[i]->irq) { 1320 netdev_dbg(netdev, 1321 "Disabling tx_scrq[%d] irq\n", i); 1322 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1323 disable_irq(adapter->tx_scrq[i]->irq); 1324 } 1325 } 1326 1327 if (adapter->rx_scrq) { 1328 for (i = 0; i < adapter->req_rx_queues; i++) { 1329 if (adapter->rx_scrq[i]->irq) { 1330 netdev_dbg(netdev, 1331 "Disabling rx_scrq[%d] irq\n", i); 1332 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1333 disable_irq(adapter->rx_scrq[i]->irq); 1334 } 1335 } 1336 } 1337 } 1338 1339 static void ibmvnic_cleanup(struct net_device *netdev) 1340 { 1341 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1342 1343 /* ensure that transmissions are stopped if called by do_reset */ 1344 if (test_bit(0, &adapter->resetting)) 1345 netif_tx_disable(netdev); 1346 else 1347 netif_tx_stop_all_queues(netdev); 1348 1349 ibmvnic_napi_disable(adapter); 1350 ibmvnic_disable_irqs(adapter); 1351 1352 clean_rx_pools(adapter); 1353 clean_tx_pools(adapter); 1354 } 1355 1356 static int __ibmvnic_close(struct net_device *netdev) 1357 { 1358 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1359 int rc = 0; 1360 1361 adapter->state = VNIC_CLOSING; 1362 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1363 adapter->state = VNIC_CLOSED; 1364 return rc; 1365 } 1366 1367 static int ibmvnic_close(struct net_device *netdev) 1368 { 1369 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1370 int rc; 1371 1372 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 1373 adapter_state_to_string(adapter->state), 1374 adapter->failover_pending, 1375 adapter->force_reset_recovery); 1376 1377 /* If device failover is pending, just set device state and return. 1378 * Device operation will be handled by reset routine. 1379 */ 1380 if (adapter->failover_pending) { 1381 adapter->state = VNIC_CLOSED; 1382 return 0; 1383 } 1384 1385 rc = __ibmvnic_close(netdev); 1386 ibmvnic_cleanup(netdev); 1387 1388 return rc; 1389 } 1390 1391 /** 1392 * build_hdr_data - creates L2/L3/L4 header data buffer 1393 * @hdr_field: bitfield determining needed headers 1394 * @skb: socket buffer 1395 * @hdr_len: array of header lengths 1396 * @hdr_data: buffer to write the header to 1397 * 1398 * Reads hdr_field to determine which headers are needed by firmware. 1399 * Builds a buffer containing these headers. Saves individual header 1400 * lengths and total buffer length to be used to build descriptors. 1401 */ 1402 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1403 int *hdr_len, u8 *hdr_data) 1404 { 1405 int len = 0; 1406 u8 *hdr; 1407 1408 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1409 hdr_len[0] = sizeof(struct vlan_ethhdr); 1410 else 1411 hdr_len[0] = sizeof(struct ethhdr); 1412 1413 if (skb->protocol == htons(ETH_P_IP)) { 1414 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1415 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1416 hdr_len[2] = tcp_hdrlen(skb); 1417 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1418 hdr_len[2] = sizeof(struct udphdr); 1419 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1420 hdr_len[1] = sizeof(struct ipv6hdr); 1421 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1422 hdr_len[2] = tcp_hdrlen(skb); 1423 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1424 hdr_len[2] = sizeof(struct udphdr); 1425 } else if (skb->protocol == htons(ETH_P_ARP)) { 1426 hdr_len[1] = arp_hdr_len(skb->dev); 1427 hdr_len[2] = 0; 1428 } 1429 1430 memset(hdr_data, 0, 120); 1431 if ((hdr_field >> 6) & 1) { 1432 hdr = skb_mac_header(skb); 1433 memcpy(hdr_data, hdr, hdr_len[0]); 1434 len += hdr_len[0]; 1435 } 1436 1437 if ((hdr_field >> 5) & 1) { 1438 hdr = skb_network_header(skb); 1439 memcpy(hdr_data + len, hdr, hdr_len[1]); 1440 len += hdr_len[1]; 1441 } 1442 1443 if ((hdr_field >> 4) & 1) { 1444 hdr = skb_transport_header(skb); 1445 memcpy(hdr_data + len, hdr, hdr_len[2]); 1446 len += hdr_len[2]; 1447 } 1448 return len; 1449 } 1450 1451 /** 1452 * create_hdr_descs - create header and header extension descriptors 1453 * @hdr_field: bitfield determining needed headers 1454 * @hdr_data: buffer containing header data 1455 * @len: length of data buffer 1456 * @hdr_len: array of individual header lengths 1457 * @scrq_arr: descriptor array 1458 * 1459 * Creates header and, if needed, header extension descriptors and 1460 * places them in a descriptor array, scrq_arr 1461 */ 1462 1463 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1464 union sub_crq *scrq_arr) 1465 { 1466 union sub_crq hdr_desc; 1467 int tmp_len = len; 1468 int num_descs = 0; 1469 u8 *data, *cur; 1470 int tmp; 1471 1472 while (tmp_len > 0) { 1473 cur = hdr_data + len - tmp_len; 1474 1475 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1476 if (cur != hdr_data) { 1477 data = hdr_desc.hdr_ext.data; 1478 tmp = tmp_len > 29 ? 29 : tmp_len; 1479 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1480 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1481 hdr_desc.hdr_ext.len = tmp; 1482 } else { 1483 data = hdr_desc.hdr.data; 1484 tmp = tmp_len > 24 ? 24 : tmp_len; 1485 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1486 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1487 hdr_desc.hdr.len = tmp; 1488 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1489 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1490 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1491 hdr_desc.hdr.flag = hdr_field << 1; 1492 } 1493 memcpy(data, cur, tmp); 1494 tmp_len -= tmp; 1495 *scrq_arr = hdr_desc; 1496 scrq_arr++; 1497 num_descs++; 1498 } 1499 1500 return num_descs; 1501 } 1502 1503 /** 1504 * build_hdr_descs_arr - build a header descriptor array 1505 * @txbuff: tx buffer 1506 * @num_entries: number of descriptors to be sent 1507 * @hdr_field: bit field determining which headers will be sent 1508 * 1509 * This function will build a TX descriptor array with applicable 1510 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1511 */ 1512 1513 static void build_hdr_descs_arr(struct sk_buff *skb, 1514 union sub_crq *indir_arr, 1515 int *num_entries, u8 hdr_field) 1516 { 1517 int hdr_len[3] = {0, 0, 0}; 1518 u8 hdr_data[140] = {0}; 1519 int tot_len; 1520 1521 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 1522 hdr_data); 1523 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1524 indir_arr + 1); 1525 } 1526 1527 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1528 struct net_device *netdev) 1529 { 1530 /* For some backing devices, mishandling of small packets 1531 * can result in a loss of connection or TX stall. Device 1532 * architects recommend that no packet should be smaller 1533 * than the minimum MTU value provided to the driver, so 1534 * pad any packets to that length 1535 */ 1536 if (skb->len < netdev->min_mtu) 1537 return skb_put_padto(skb, netdev->min_mtu); 1538 1539 return 0; 1540 } 1541 1542 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 1543 struct ibmvnic_sub_crq_queue *tx_scrq) 1544 { 1545 struct ibmvnic_ind_xmit_queue *ind_bufp; 1546 struct ibmvnic_tx_buff *tx_buff; 1547 struct ibmvnic_tx_pool *tx_pool; 1548 union sub_crq tx_scrq_entry; 1549 int queue_num; 1550 int entries; 1551 int index; 1552 int i; 1553 1554 ind_bufp = &tx_scrq->ind_buf; 1555 entries = (u64)ind_bufp->index; 1556 queue_num = tx_scrq->pool_index; 1557 1558 for (i = entries - 1; i >= 0; --i) { 1559 tx_scrq_entry = ind_bufp->indir_arr[i]; 1560 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 1561 continue; 1562 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 1563 if (index & IBMVNIC_TSO_POOL_MASK) { 1564 tx_pool = &adapter->tso_pool[queue_num]; 1565 index &= ~IBMVNIC_TSO_POOL_MASK; 1566 } else { 1567 tx_pool = &adapter->tx_pool[queue_num]; 1568 } 1569 tx_pool->free_map[tx_pool->consumer_index] = index; 1570 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1571 tx_pool->num_buffers - 1 : 1572 tx_pool->consumer_index - 1; 1573 tx_buff = &tx_pool->tx_buff[index]; 1574 adapter->netdev->stats.tx_packets--; 1575 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 1576 adapter->tx_stats_buffers[queue_num].packets--; 1577 adapter->tx_stats_buffers[queue_num].bytes -= 1578 tx_buff->skb->len; 1579 dev_kfree_skb_any(tx_buff->skb); 1580 tx_buff->skb = NULL; 1581 adapter->netdev->stats.tx_dropped++; 1582 } 1583 ind_bufp->index = 0; 1584 if (atomic_sub_return(entries, &tx_scrq->used) <= 1585 (adapter->req_tx_entries_per_subcrq / 2) && 1586 __netif_subqueue_stopped(adapter->netdev, queue_num)) { 1587 netif_wake_subqueue(adapter->netdev, queue_num); 1588 netdev_dbg(adapter->netdev, "Started queue %d\n", 1589 queue_num); 1590 } 1591 } 1592 1593 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 1594 struct ibmvnic_sub_crq_queue *tx_scrq) 1595 { 1596 struct ibmvnic_ind_xmit_queue *ind_bufp; 1597 u64 dma_addr; 1598 u64 entries; 1599 u64 handle; 1600 int rc; 1601 1602 ind_bufp = &tx_scrq->ind_buf; 1603 dma_addr = (u64)ind_bufp->indir_dma; 1604 entries = (u64)ind_bufp->index; 1605 handle = tx_scrq->handle; 1606 1607 if (!entries) 1608 return 0; 1609 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 1610 if (rc) 1611 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 1612 else 1613 ind_bufp->index = 0; 1614 return 0; 1615 } 1616 1617 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1618 { 1619 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1620 int queue_num = skb_get_queue_mapping(skb); 1621 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1622 struct device *dev = &adapter->vdev->dev; 1623 struct ibmvnic_ind_xmit_queue *ind_bufp; 1624 struct ibmvnic_tx_buff *tx_buff = NULL; 1625 struct ibmvnic_sub_crq_queue *tx_scrq; 1626 struct ibmvnic_tx_pool *tx_pool; 1627 unsigned int tx_send_failed = 0; 1628 netdev_tx_t ret = NETDEV_TX_OK; 1629 unsigned int tx_map_failed = 0; 1630 union sub_crq indir_arr[16]; 1631 unsigned int tx_dropped = 0; 1632 unsigned int tx_packets = 0; 1633 unsigned int tx_bytes = 0; 1634 dma_addr_t data_dma_addr; 1635 struct netdev_queue *txq; 1636 unsigned long lpar_rc; 1637 union sub_crq tx_crq; 1638 unsigned int offset; 1639 int num_entries = 1; 1640 unsigned char *dst; 1641 int index = 0; 1642 u8 proto = 0; 1643 1644 tx_scrq = adapter->tx_scrq[queue_num]; 1645 txq = netdev_get_tx_queue(netdev, queue_num); 1646 ind_bufp = &tx_scrq->ind_buf; 1647 1648 if (test_bit(0, &adapter->resetting)) { 1649 if (!netif_subqueue_stopped(netdev, skb)) 1650 netif_stop_subqueue(netdev, queue_num); 1651 dev_kfree_skb_any(skb); 1652 1653 tx_send_failed++; 1654 tx_dropped++; 1655 ret = NETDEV_TX_OK; 1656 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1657 goto out; 1658 } 1659 1660 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1661 tx_dropped++; 1662 tx_send_failed++; 1663 ret = NETDEV_TX_OK; 1664 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1665 goto out; 1666 } 1667 if (skb_is_gso(skb)) 1668 tx_pool = &adapter->tso_pool[queue_num]; 1669 else 1670 tx_pool = &adapter->tx_pool[queue_num]; 1671 1672 index = tx_pool->free_map[tx_pool->consumer_index]; 1673 1674 if (index == IBMVNIC_INVALID_MAP) { 1675 dev_kfree_skb_any(skb); 1676 tx_send_failed++; 1677 tx_dropped++; 1678 ret = NETDEV_TX_OK; 1679 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1680 goto out; 1681 } 1682 1683 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1684 1685 offset = index * tx_pool->buf_size; 1686 dst = tx_pool->long_term_buff.buff + offset; 1687 memset(dst, 0, tx_pool->buf_size); 1688 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1689 1690 if (skb_shinfo(skb)->nr_frags) { 1691 int cur, i; 1692 1693 /* Copy the head */ 1694 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1695 cur = skb_headlen(skb); 1696 1697 /* Copy the frags */ 1698 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1699 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1700 1701 memcpy(dst + cur, skb_frag_address(frag), 1702 skb_frag_size(frag)); 1703 cur += skb_frag_size(frag); 1704 } 1705 } else { 1706 skb_copy_from_linear_data(skb, dst, skb->len); 1707 } 1708 1709 /* post changes to long_term_buff *dst before VIOS accessing it */ 1710 dma_wmb(); 1711 1712 tx_pool->consumer_index = 1713 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1714 1715 tx_buff = &tx_pool->tx_buff[index]; 1716 tx_buff->skb = skb; 1717 tx_buff->index = index; 1718 tx_buff->pool_index = queue_num; 1719 1720 memset(&tx_crq, 0, sizeof(tx_crq)); 1721 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1722 tx_crq.v1.type = IBMVNIC_TX_DESC; 1723 tx_crq.v1.n_crq_elem = 1; 1724 tx_crq.v1.n_sge = 1; 1725 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1726 1727 if (skb_is_gso(skb)) 1728 tx_crq.v1.correlator = 1729 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1730 else 1731 tx_crq.v1.correlator = cpu_to_be32(index); 1732 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1733 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1734 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1735 1736 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1737 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1738 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1739 } 1740 1741 if (skb->protocol == htons(ETH_P_IP)) { 1742 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1743 proto = ip_hdr(skb)->protocol; 1744 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1745 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1746 proto = ipv6_hdr(skb)->nexthdr; 1747 } 1748 1749 if (proto == IPPROTO_TCP) 1750 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1751 else if (proto == IPPROTO_UDP) 1752 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1753 1754 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1755 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1756 hdrs += 2; 1757 } 1758 if (skb_is_gso(skb)) { 1759 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1760 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1761 hdrs += 2; 1762 } 1763 1764 if ((*hdrs >> 7) & 1) 1765 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 1766 1767 tx_crq.v1.n_crq_elem = num_entries; 1768 tx_buff->num_entries = num_entries; 1769 /* flush buffer if current entry can not fit */ 1770 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 1771 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1772 if (lpar_rc != H_SUCCESS) 1773 goto tx_flush_err; 1774 } 1775 1776 indir_arr[0] = tx_crq; 1777 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 1778 num_entries * sizeof(struct ibmvnic_generic_scrq)); 1779 ind_bufp->index += num_entries; 1780 if (__netdev_tx_sent_queue(txq, skb->len, 1781 netdev_xmit_more() && 1782 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 1783 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1784 if (lpar_rc != H_SUCCESS) 1785 goto tx_err; 1786 } 1787 1788 if (atomic_add_return(num_entries, &tx_scrq->used) 1789 >= adapter->req_tx_entries_per_subcrq) { 1790 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1791 netif_stop_subqueue(netdev, queue_num); 1792 } 1793 1794 tx_packets++; 1795 tx_bytes += skb->len; 1796 txq->trans_start = jiffies; 1797 ret = NETDEV_TX_OK; 1798 goto out; 1799 1800 tx_flush_err: 1801 dev_kfree_skb_any(skb); 1802 tx_buff->skb = NULL; 1803 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1804 tx_pool->num_buffers - 1 : 1805 tx_pool->consumer_index - 1; 1806 tx_dropped++; 1807 tx_err: 1808 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1809 dev_err_ratelimited(dev, "tx: send failed\n"); 1810 1811 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1812 /* Disable TX and report carrier off if queue is closed 1813 * or pending failover. 1814 * Firmware guarantees that a signal will be sent to the 1815 * driver, triggering a reset or some other action. 1816 */ 1817 netif_tx_stop_all_queues(netdev); 1818 netif_carrier_off(netdev); 1819 } 1820 out: 1821 netdev->stats.tx_dropped += tx_dropped; 1822 netdev->stats.tx_bytes += tx_bytes; 1823 netdev->stats.tx_packets += tx_packets; 1824 adapter->tx_send_failed += tx_send_failed; 1825 adapter->tx_map_failed += tx_map_failed; 1826 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1827 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1828 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1829 1830 return ret; 1831 } 1832 1833 static void ibmvnic_set_multi(struct net_device *netdev) 1834 { 1835 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1836 struct netdev_hw_addr *ha; 1837 union ibmvnic_crq crq; 1838 1839 memset(&crq, 0, sizeof(crq)); 1840 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1841 crq.request_capability.cmd = REQUEST_CAPABILITY; 1842 1843 if (netdev->flags & IFF_PROMISC) { 1844 if (!adapter->promisc_supported) 1845 return; 1846 } else { 1847 if (netdev->flags & IFF_ALLMULTI) { 1848 /* Accept all multicast */ 1849 memset(&crq, 0, sizeof(crq)); 1850 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1851 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1852 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1853 ibmvnic_send_crq(adapter, &crq); 1854 } else if (netdev_mc_empty(netdev)) { 1855 /* Reject all multicast */ 1856 memset(&crq, 0, sizeof(crq)); 1857 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1858 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1859 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1860 ibmvnic_send_crq(adapter, &crq); 1861 } else { 1862 /* Accept one or more multicast(s) */ 1863 netdev_for_each_mc_addr(ha, netdev) { 1864 memset(&crq, 0, sizeof(crq)); 1865 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1866 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1867 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1868 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1869 ha->addr); 1870 ibmvnic_send_crq(adapter, &crq); 1871 } 1872 } 1873 } 1874 } 1875 1876 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1877 { 1878 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1879 union ibmvnic_crq crq; 1880 int rc; 1881 1882 if (!is_valid_ether_addr(dev_addr)) { 1883 rc = -EADDRNOTAVAIL; 1884 goto err; 1885 } 1886 1887 memset(&crq, 0, sizeof(crq)); 1888 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1889 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1890 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1891 1892 mutex_lock(&adapter->fw_lock); 1893 adapter->fw_done_rc = 0; 1894 reinit_completion(&adapter->fw_done); 1895 1896 rc = ibmvnic_send_crq(adapter, &crq); 1897 if (rc) { 1898 rc = -EIO; 1899 mutex_unlock(&adapter->fw_lock); 1900 goto err; 1901 } 1902 1903 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1904 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1905 if (rc || adapter->fw_done_rc) { 1906 rc = -EIO; 1907 mutex_unlock(&adapter->fw_lock); 1908 goto err; 1909 } 1910 mutex_unlock(&adapter->fw_lock); 1911 return 0; 1912 err: 1913 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1914 return rc; 1915 } 1916 1917 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1918 { 1919 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1920 struct sockaddr *addr = p; 1921 int rc; 1922 1923 rc = 0; 1924 if (!is_valid_ether_addr(addr->sa_data)) 1925 return -EADDRNOTAVAIL; 1926 1927 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1928 if (adapter->state != VNIC_PROBED) 1929 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1930 1931 return rc; 1932 } 1933 1934 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 1935 { 1936 switch (reason) { 1937 case VNIC_RESET_FAILOVER: 1938 return "FAILOVER"; 1939 case VNIC_RESET_MOBILITY: 1940 return "MOBILITY"; 1941 case VNIC_RESET_FATAL: 1942 return "FATAL"; 1943 case VNIC_RESET_NON_FATAL: 1944 return "NON_FATAL"; 1945 case VNIC_RESET_TIMEOUT: 1946 return "TIMEOUT"; 1947 case VNIC_RESET_CHANGE_PARAM: 1948 return "CHANGE_PARAM"; 1949 default: 1950 return "UNKNOWN"; 1951 } 1952 } 1953 1954 /* 1955 * do_reset returns zero if we are able to keep processing reset events, or 1956 * non-zero if we hit a fatal error and must halt. 1957 */ 1958 static int do_reset(struct ibmvnic_adapter *adapter, 1959 struct ibmvnic_rwi *rwi, u32 reset_state) 1960 { 1961 u64 old_num_rx_queues, old_num_tx_queues; 1962 u64 old_num_rx_slots, old_num_tx_slots; 1963 struct net_device *netdev = adapter->netdev; 1964 int rc; 1965 1966 netdev_dbg(adapter->netdev, 1967 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 1968 adapter_state_to_string(adapter->state), 1969 adapter->failover_pending, 1970 reset_reason_to_string(rwi->reset_reason), 1971 adapter_state_to_string(reset_state)); 1972 1973 adapter->reset_reason = rwi->reset_reason; 1974 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 1975 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 1976 rtnl_lock(); 1977 1978 /* Now that we have the rtnl lock, clear any pending failover. 1979 * This will ensure ibmvnic_open() has either completed or will 1980 * block until failover is complete. 1981 */ 1982 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 1983 adapter->failover_pending = false; 1984 1985 /* read the state and check (again) after getting rtnl */ 1986 reset_state = adapter->state; 1987 1988 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 1989 rc = -EBUSY; 1990 goto out; 1991 } 1992 1993 netif_carrier_off(netdev); 1994 1995 old_num_rx_queues = adapter->req_rx_queues; 1996 old_num_tx_queues = adapter->req_tx_queues; 1997 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1998 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1999 2000 ibmvnic_cleanup(netdev); 2001 2002 if (reset_state == VNIC_OPEN && 2003 adapter->reset_reason != VNIC_RESET_MOBILITY && 2004 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2005 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2006 rc = __ibmvnic_close(netdev); 2007 if (rc) 2008 goto out; 2009 } else { 2010 adapter->state = VNIC_CLOSING; 2011 2012 /* Release the RTNL lock before link state change and 2013 * re-acquire after the link state change to allow 2014 * linkwatch_event to grab the RTNL lock and run during 2015 * a reset. 2016 */ 2017 rtnl_unlock(); 2018 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2019 rtnl_lock(); 2020 if (rc) 2021 goto out; 2022 2023 if (adapter->state == VNIC_OPEN) { 2024 /* When we dropped rtnl, ibmvnic_open() got 2025 * it and noticed that we are resetting and 2026 * set the adapter state to OPEN. Update our 2027 * new "target" state, and resume the reset 2028 * from VNIC_CLOSING state. 2029 */ 2030 netdev_dbg(netdev, 2031 "Open changed state from %s, updating.\n", 2032 adapter_state_to_string(reset_state)); 2033 reset_state = VNIC_OPEN; 2034 adapter->state = VNIC_CLOSING; 2035 } 2036 2037 if (adapter->state != VNIC_CLOSING) { 2038 /* If someone else changed the adapter state 2039 * when we dropped the rtnl, fail the reset 2040 */ 2041 rc = -1; 2042 goto out; 2043 } 2044 adapter->state = VNIC_CLOSED; 2045 } 2046 } 2047 2048 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2049 release_resources(adapter); 2050 release_sub_crqs(adapter, 1); 2051 release_crq_queue(adapter); 2052 } 2053 2054 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2055 /* remove the closed state so when we call open it appears 2056 * we are coming from the probed state. 2057 */ 2058 adapter->state = VNIC_PROBED; 2059 2060 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2061 rc = init_crq_queue(adapter); 2062 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2063 rc = ibmvnic_reenable_crq_queue(adapter); 2064 release_sub_crqs(adapter, 1); 2065 } else { 2066 rc = ibmvnic_reset_crq(adapter); 2067 if (rc == H_CLOSED || rc == H_SUCCESS) { 2068 rc = vio_enable_interrupts(adapter->vdev); 2069 if (rc) 2070 netdev_err(adapter->netdev, 2071 "Reset failed to enable interrupts. rc=%d\n", 2072 rc); 2073 } 2074 } 2075 2076 if (rc) { 2077 netdev_err(adapter->netdev, 2078 "Reset couldn't initialize crq. rc=%d\n", rc); 2079 goto out; 2080 } 2081 2082 rc = ibmvnic_reset_init(adapter, true); 2083 if (rc) { 2084 rc = IBMVNIC_INIT_FAILED; 2085 goto out; 2086 } 2087 2088 /* If the adapter was in PROBE state prior to the reset, 2089 * exit here. 2090 */ 2091 if (reset_state == VNIC_PROBED) { 2092 rc = 0; 2093 goto out; 2094 } 2095 2096 rc = ibmvnic_login(netdev); 2097 if (rc) 2098 goto out; 2099 2100 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2101 rc = init_resources(adapter); 2102 if (rc) 2103 goto out; 2104 } else if (adapter->req_rx_queues != old_num_rx_queues || 2105 adapter->req_tx_queues != old_num_tx_queues || 2106 adapter->req_rx_add_entries_per_subcrq != 2107 old_num_rx_slots || 2108 adapter->req_tx_entries_per_subcrq != 2109 old_num_tx_slots || 2110 !adapter->rx_pool || 2111 !adapter->tso_pool || 2112 !adapter->tx_pool) { 2113 release_rx_pools(adapter); 2114 release_tx_pools(adapter); 2115 release_napi(adapter); 2116 release_vpd_data(adapter); 2117 2118 rc = init_resources(adapter); 2119 if (rc) 2120 goto out; 2121 2122 } else { 2123 rc = reset_tx_pools(adapter); 2124 if (rc) { 2125 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2126 rc); 2127 goto out; 2128 } 2129 2130 rc = reset_rx_pools(adapter); 2131 if (rc) { 2132 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2133 rc); 2134 goto out; 2135 } 2136 } 2137 ibmvnic_disable_irqs(adapter); 2138 } 2139 adapter->state = VNIC_CLOSED; 2140 2141 if (reset_state == VNIC_CLOSED) { 2142 rc = 0; 2143 goto out; 2144 } 2145 2146 rc = __ibmvnic_open(netdev); 2147 if (rc) { 2148 rc = IBMVNIC_OPEN_FAILED; 2149 goto out; 2150 } 2151 2152 /* refresh device's multicast list */ 2153 ibmvnic_set_multi(netdev); 2154 2155 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2156 adapter->reset_reason == VNIC_RESET_MOBILITY) 2157 __netdev_notify_peers(netdev); 2158 2159 rc = 0; 2160 2161 out: 2162 /* restore the adapter state if reset failed */ 2163 if (rc) 2164 adapter->state = reset_state; 2165 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2166 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2167 rtnl_unlock(); 2168 2169 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 2170 adapter_state_to_string(adapter->state), 2171 adapter->failover_pending, rc); 2172 return rc; 2173 } 2174 2175 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2176 struct ibmvnic_rwi *rwi, u32 reset_state) 2177 { 2178 struct net_device *netdev = adapter->netdev; 2179 int rc; 2180 2181 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 2182 reset_reason_to_string(rwi->reset_reason)); 2183 2184 /* read the state and check (again) after getting rtnl */ 2185 reset_state = adapter->state; 2186 2187 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2188 rc = -EBUSY; 2189 goto out; 2190 } 2191 2192 netif_carrier_off(netdev); 2193 adapter->reset_reason = rwi->reset_reason; 2194 2195 ibmvnic_cleanup(netdev); 2196 release_resources(adapter); 2197 release_sub_crqs(adapter, 0); 2198 release_crq_queue(adapter); 2199 2200 /* remove the closed state so when we call open it appears 2201 * we are coming from the probed state. 2202 */ 2203 adapter->state = VNIC_PROBED; 2204 2205 reinit_completion(&adapter->init_done); 2206 rc = init_crq_queue(adapter); 2207 if (rc) { 2208 netdev_err(adapter->netdev, 2209 "Couldn't initialize crq. rc=%d\n", rc); 2210 goto out; 2211 } 2212 2213 rc = ibmvnic_reset_init(adapter, false); 2214 if (rc) 2215 goto out; 2216 2217 /* If the adapter was in PROBE state prior to the reset, 2218 * exit here. 2219 */ 2220 if (reset_state == VNIC_PROBED) 2221 goto out; 2222 2223 rc = ibmvnic_login(netdev); 2224 if (rc) 2225 goto out; 2226 2227 rc = init_resources(adapter); 2228 if (rc) 2229 goto out; 2230 2231 ibmvnic_disable_irqs(adapter); 2232 adapter->state = VNIC_CLOSED; 2233 2234 if (reset_state == VNIC_CLOSED) 2235 goto out; 2236 2237 rc = __ibmvnic_open(netdev); 2238 if (rc) { 2239 rc = IBMVNIC_OPEN_FAILED; 2240 goto out; 2241 } 2242 2243 __netdev_notify_peers(netdev); 2244 out: 2245 /* restore adapter state if reset failed */ 2246 if (rc) 2247 adapter->state = reset_state; 2248 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 2249 adapter_state_to_string(adapter->state), 2250 adapter->failover_pending, rc); 2251 return rc; 2252 } 2253 2254 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2255 { 2256 struct ibmvnic_rwi *rwi; 2257 unsigned long flags; 2258 2259 spin_lock_irqsave(&adapter->rwi_lock, flags); 2260 2261 if (!list_empty(&adapter->rwi_list)) { 2262 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2263 list); 2264 list_del(&rwi->list); 2265 } else { 2266 rwi = NULL; 2267 } 2268 2269 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2270 return rwi; 2271 } 2272 2273 static void __ibmvnic_reset(struct work_struct *work) 2274 { 2275 struct ibmvnic_rwi *rwi; 2276 struct ibmvnic_adapter *adapter; 2277 bool saved_state = false; 2278 unsigned long flags; 2279 u32 reset_state; 2280 int rc = 0; 2281 2282 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2283 2284 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2285 queue_delayed_work(system_long_wq, 2286 &adapter->ibmvnic_delayed_reset, 2287 IBMVNIC_RESET_DELAY); 2288 return; 2289 } 2290 2291 rwi = get_next_rwi(adapter); 2292 while (rwi) { 2293 spin_lock_irqsave(&adapter->state_lock, flags); 2294 2295 if (adapter->state == VNIC_REMOVING || 2296 adapter->state == VNIC_REMOVED) { 2297 spin_unlock_irqrestore(&adapter->state_lock, flags); 2298 kfree(rwi); 2299 rc = EBUSY; 2300 break; 2301 } 2302 2303 if (!saved_state) { 2304 reset_state = adapter->state; 2305 saved_state = true; 2306 } 2307 spin_unlock_irqrestore(&adapter->state_lock, flags); 2308 2309 if (adapter->force_reset_recovery) { 2310 /* Since we are doing a hard reset now, clear the 2311 * failover_pending flag so we don't ignore any 2312 * future MOBILITY or other resets. 2313 */ 2314 adapter->failover_pending = false; 2315 2316 /* Transport event occurred during previous reset */ 2317 if (adapter->wait_for_reset) { 2318 /* Previous was CHANGE_PARAM; caller locked */ 2319 adapter->force_reset_recovery = false; 2320 rc = do_hard_reset(adapter, rwi, reset_state); 2321 } else { 2322 rtnl_lock(); 2323 adapter->force_reset_recovery = false; 2324 rc = do_hard_reset(adapter, rwi, reset_state); 2325 rtnl_unlock(); 2326 } 2327 if (rc) { 2328 /* give backing device time to settle down */ 2329 netdev_dbg(adapter->netdev, 2330 "[S:%s] Hard reset failed, waiting 60 secs\n", 2331 adapter_state_to_string(adapter->state)); 2332 set_current_state(TASK_UNINTERRUPTIBLE); 2333 schedule_timeout(60 * HZ); 2334 } 2335 } else { 2336 rc = do_reset(adapter, rwi, reset_state); 2337 } 2338 kfree(rwi); 2339 adapter->last_reset_time = jiffies; 2340 2341 if (rc) 2342 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2343 2344 rwi = get_next_rwi(adapter); 2345 2346 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2347 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2348 adapter->force_reset_recovery = true; 2349 } 2350 2351 if (adapter->wait_for_reset) { 2352 adapter->reset_done_rc = rc; 2353 complete(&adapter->reset_done); 2354 } 2355 2356 clear_bit_unlock(0, &adapter->resetting); 2357 2358 netdev_dbg(adapter->netdev, 2359 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 2360 adapter_state_to_string(adapter->state), 2361 adapter->force_reset_recovery, 2362 adapter->wait_for_reset); 2363 } 2364 2365 static void __ibmvnic_delayed_reset(struct work_struct *work) 2366 { 2367 struct ibmvnic_adapter *adapter; 2368 2369 adapter = container_of(work, struct ibmvnic_adapter, 2370 ibmvnic_delayed_reset.work); 2371 __ibmvnic_reset(&adapter->ibmvnic_reset); 2372 } 2373 2374 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2375 enum ibmvnic_reset_reason reason) 2376 { 2377 struct list_head *entry, *tmp_entry; 2378 struct ibmvnic_rwi *rwi, *tmp; 2379 struct net_device *netdev = adapter->netdev; 2380 unsigned long flags; 2381 int ret; 2382 2383 spin_lock_irqsave(&adapter->rwi_lock, flags); 2384 2385 /* If failover is pending don't schedule any other reset. 2386 * Instead let the failover complete. If there is already a 2387 * a failover reset scheduled, we will detect and drop the 2388 * duplicate reset when walking the ->rwi_list below. 2389 */ 2390 if (adapter->state == VNIC_REMOVING || 2391 adapter->state == VNIC_REMOVED || 2392 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2393 ret = EBUSY; 2394 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2395 goto err; 2396 } 2397 2398 if (adapter->state == VNIC_PROBING) { 2399 netdev_warn(netdev, "Adapter reset during probe\n"); 2400 adapter->init_done_rc = EAGAIN; 2401 ret = EAGAIN; 2402 goto err; 2403 } 2404 2405 list_for_each(entry, &adapter->rwi_list) { 2406 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2407 if (tmp->reset_reason == reason) { 2408 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 2409 reset_reason_to_string(reason)); 2410 ret = EBUSY; 2411 goto err; 2412 } 2413 } 2414 2415 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2416 if (!rwi) { 2417 ret = ENOMEM; 2418 goto err; 2419 } 2420 /* if we just received a transport event, 2421 * flush reset queue and process this reset 2422 */ 2423 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2424 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2425 list_del(entry); 2426 } 2427 rwi->reset_reason = reason; 2428 list_add_tail(&rwi->list, &adapter->rwi_list); 2429 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 2430 reset_reason_to_string(reason)); 2431 queue_work(system_long_wq, &adapter->ibmvnic_reset); 2432 2433 ret = 0; 2434 err: 2435 /* ibmvnic_close() below can block, so drop the lock first */ 2436 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2437 2438 if (ret == ENOMEM) 2439 ibmvnic_close(netdev); 2440 2441 return -ret; 2442 } 2443 2444 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2445 { 2446 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2447 2448 if (test_bit(0, &adapter->resetting)) { 2449 netdev_err(adapter->netdev, 2450 "Adapter is resetting, skip timeout reset\n"); 2451 return; 2452 } 2453 /* No queuing up reset until at least 5 seconds (default watchdog val) 2454 * after last reset 2455 */ 2456 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2457 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2458 return; 2459 } 2460 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2461 } 2462 2463 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2464 struct ibmvnic_rx_buff *rx_buff) 2465 { 2466 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2467 2468 rx_buff->skb = NULL; 2469 2470 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2471 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2472 2473 atomic_dec(&pool->available); 2474 } 2475 2476 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2477 { 2478 struct ibmvnic_sub_crq_queue *rx_scrq; 2479 struct ibmvnic_adapter *adapter; 2480 struct net_device *netdev; 2481 int frames_processed; 2482 int scrq_num; 2483 2484 netdev = napi->dev; 2485 adapter = netdev_priv(netdev); 2486 scrq_num = (int)(napi - adapter->napi); 2487 frames_processed = 0; 2488 rx_scrq = adapter->rx_scrq[scrq_num]; 2489 2490 restart_poll: 2491 while (frames_processed < budget) { 2492 struct sk_buff *skb; 2493 struct ibmvnic_rx_buff *rx_buff; 2494 union sub_crq *next; 2495 u32 length; 2496 u16 offset; 2497 u8 flags = 0; 2498 2499 if (unlikely(test_bit(0, &adapter->resetting) && 2500 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2501 enable_scrq_irq(adapter, rx_scrq); 2502 napi_complete_done(napi, frames_processed); 2503 return frames_processed; 2504 } 2505 2506 if (!pending_scrq(adapter, rx_scrq)) 2507 break; 2508 next = ibmvnic_next_scrq(adapter, rx_scrq); 2509 rx_buff = (struct ibmvnic_rx_buff *) 2510 be64_to_cpu(next->rx_comp.correlator); 2511 /* do error checking */ 2512 if (next->rx_comp.rc) { 2513 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2514 be16_to_cpu(next->rx_comp.rc)); 2515 /* free the entry */ 2516 next->rx_comp.first = 0; 2517 dev_kfree_skb_any(rx_buff->skb); 2518 remove_buff_from_pool(adapter, rx_buff); 2519 continue; 2520 } else if (!rx_buff->skb) { 2521 /* free the entry */ 2522 next->rx_comp.first = 0; 2523 remove_buff_from_pool(adapter, rx_buff); 2524 continue; 2525 } 2526 2527 length = be32_to_cpu(next->rx_comp.len); 2528 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2529 flags = next->rx_comp.flags; 2530 skb = rx_buff->skb; 2531 /* load long_term_buff before copying to skb */ 2532 dma_rmb(); 2533 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2534 length); 2535 2536 /* VLAN Header has been stripped by the system firmware and 2537 * needs to be inserted by the driver 2538 */ 2539 if (adapter->rx_vlan_header_insertion && 2540 (flags & IBMVNIC_VLAN_STRIPPED)) 2541 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2542 ntohs(next->rx_comp.vlan_tci)); 2543 2544 /* free the entry */ 2545 next->rx_comp.first = 0; 2546 remove_buff_from_pool(adapter, rx_buff); 2547 2548 skb_put(skb, length); 2549 skb->protocol = eth_type_trans(skb, netdev); 2550 skb_record_rx_queue(skb, scrq_num); 2551 2552 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2553 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2554 skb->ip_summed = CHECKSUM_UNNECESSARY; 2555 } 2556 2557 length = skb->len; 2558 napi_gro_receive(napi, skb); /* send it up */ 2559 netdev->stats.rx_packets++; 2560 netdev->stats.rx_bytes += length; 2561 adapter->rx_stats_buffers[scrq_num].packets++; 2562 adapter->rx_stats_buffers[scrq_num].bytes += length; 2563 frames_processed++; 2564 } 2565 2566 if (adapter->state != VNIC_CLOSING && 2567 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2568 adapter->req_rx_add_entries_per_subcrq / 2) || 2569 frames_processed < budget)) 2570 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2571 if (frames_processed < budget) { 2572 if (napi_complete_done(napi, frames_processed)) { 2573 enable_scrq_irq(adapter, rx_scrq); 2574 if (pending_scrq(adapter, rx_scrq)) { 2575 if (napi_reschedule(napi)) { 2576 disable_scrq_irq(adapter, rx_scrq); 2577 goto restart_poll; 2578 } 2579 } 2580 } 2581 } 2582 return frames_processed; 2583 } 2584 2585 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2586 { 2587 int rc, ret; 2588 2589 adapter->fallback.mtu = adapter->req_mtu; 2590 adapter->fallback.rx_queues = adapter->req_rx_queues; 2591 adapter->fallback.tx_queues = adapter->req_tx_queues; 2592 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2593 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2594 2595 reinit_completion(&adapter->reset_done); 2596 adapter->wait_for_reset = true; 2597 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2598 2599 if (rc) { 2600 ret = rc; 2601 goto out; 2602 } 2603 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2604 if (rc) { 2605 ret = -ENODEV; 2606 goto out; 2607 } 2608 2609 ret = 0; 2610 if (adapter->reset_done_rc) { 2611 ret = -EIO; 2612 adapter->desired.mtu = adapter->fallback.mtu; 2613 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2614 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2615 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2616 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2617 2618 reinit_completion(&adapter->reset_done); 2619 adapter->wait_for_reset = true; 2620 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2621 if (rc) { 2622 ret = rc; 2623 goto out; 2624 } 2625 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2626 60000); 2627 if (rc) { 2628 ret = -ENODEV; 2629 goto out; 2630 } 2631 } 2632 out: 2633 adapter->wait_for_reset = false; 2634 2635 return ret; 2636 } 2637 2638 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2639 { 2640 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2641 2642 adapter->desired.mtu = new_mtu + ETH_HLEN; 2643 2644 return wait_for_reset(adapter); 2645 } 2646 2647 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2648 struct net_device *dev, 2649 netdev_features_t features) 2650 { 2651 /* Some backing hardware adapters can not 2652 * handle packets with a MSS less than 224 2653 * or with only one segment. 2654 */ 2655 if (skb_is_gso(skb)) { 2656 if (skb_shinfo(skb)->gso_size < 224 || 2657 skb_shinfo(skb)->gso_segs == 1) 2658 features &= ~NETIF_F_GSO_MASK; 2659 } 2660 2661 return features; 2662 } 2663 2664 static const struct net_device_ops ibmvnic_netdev_ops = { 2665 .ndo_open = ibmvnic_open, 2666 .ndo_stop = ibmvnic_close, 2667 .ndo_start_xmit = ibmvnic_xmit, 2668 .ndo_set_rx_mode = ibmvnic_set_multi, 2669 .ndo_set_mac_address = ibmvnic_set_mac, 2670 .ndo_validate_addr = eth_validate_addr, 2671 .ndo_tx_timeout = ibmvnic_tx_timeout, 2672 .ndo_change_mtu = ibmvnic_change_mtu, 2673 .ndo_features_check = ibmvnic_features_check, 2674 }; 2675 2676 /* ethtool functions */ 2677 2678 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2679 struct ethtool_link_ksettings *cmd) 2680 { 2681 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2682 int rc; 2683 2684 rc = send_query_phys_parms(adapter); 2685 if (rc) { 2686 adapter->speed = SPEED_UNKNOWN; 2687 adapter->duplex = DUPLEX_UNKNOWN; 2688 } 2689 cmd->base.speed = adapter->speed; 2690 cmd->base.duplex = adapter->duplex; 2691 cmd->base.port = PORT_FIBRE; 2692 cmd->base.phy_address = 0; 2693 cmd->base.autoneg = AUTONEG_ENABLE; 2694 2695 return 0; 2696 } 2697 2698 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2699 struct ethtool_drvinfo *info) 2700 { 2701 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2702 2703 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2704 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2705 strscpy(info->fw_version, adapter->fw_version, 2706 sizeof(info->fw_version)); 2707 } 2708 2709 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2710 { 2711 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2712 2713 return adapter->msg_enable; 2714 } 2715 2716 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2717 { 2718 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2719 2720 adapter->msg_enable = data; 2721 } 2722 2723 static u32 ibmvnic_get_link(struct net_device *netdev) 2724 { 2725 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2726 2727 /* Don't need to send a query because we request a logical link up at 2728 * init and then we wait for link state indications 2729 */ 2730 return adapter->logical_link_state; 2731 } 2732 2733 static void ibmvnic_get_ringparam(struct net_device *netdev, 2734 struct ethtool_ringparam *ring) 2735 { 2736 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2737 2738 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2739 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2740 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2741 } else { 2742 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2743 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2744 } 2745 ring->rx_mini_max_pending = 0; 2746 ring->rx_jumbo_max_pending = 0; 2747 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2748 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2749 ring->rx_mini_pending = 0; 2750 ring->rx_jumbo_pending = 0; 2751 } 2752 2753 static int ibmvnic_set_ringparam(struct net_device *netdev, 2754 struct ethtool_ringparam *ring) 2755 { 2756 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2757 int ret; 2758 2759 ret = 0; 2760 adapter->desired.rx_entries = ring->rx_pending; 2761 adapter->desired.tx_entries = ring->tx_pending; 2762 2763 ret = wait_for_reset(adapter); 2764 2765 if (!ret && 2766 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2767 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2768 netdev_info(netdev, 2769 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2770 ring->rx_pending, ring->tx_pending, 2771 adapter->req_rx_add_entries_per_subcrq, 2772 adapter->req_tx_entries_per_subcrq); 2773 return ret; 2774 } 2775 2776 static void ibmvnic_get_channels(struct net_device *netdev, 2777 struct ethtool_channels *channels) 2778 { 2779 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2780 2781 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2782 channels->max_rx = adapter->max_rx_queues; 2783 channels->max_tx = adapter->max_tx_queues; 2784 } else { 2785 channels->max_rx = IBMVNIC_MAX_QUEUES; 2786 channels->max_tx = IBMVNIC_MAX_QUEUES; 2787 } 2788 2789 channels->max_other = 0; 2790 channels->max_combined = 0; 2791 channels->rx_count = adapter->req_rx_queues; 2792 channels->tx_count = adapter->req_tx_queues; 2793 channels->other_count = 0; 2794 channels->combined_count = 0; 2795 } 2796 2797 static int ibmvnic_set_channels(struct net_device *netdev, 2798 struct ethtool_channels *channels) 2799 { 2800 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2801 int ret; 2802 2803 ret = 0; 2804 adapter->desired.rx_queues = channels->rx_count; 2805 adapter->desired.tx_queues = channels->tx_count; 2806 2807 ret = wait_for_reset(adapter); 2808 2809 if (!ret && 2810 (adapter->req_rx_queues != channels->rx_count || 2811 adapter->req_tx_queues != channels->tx_count)) 2812 netdev_info(netdev, 2813 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2814 channels->rx_count, channels->tx_count, 2815 adapter->req_rx_queues, adapter->req_tx_queues); 2816 return ret; 2817 } 2818 2819 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2820 { 2821 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2822 int i; 2823 2824 switch (stringset) { 2825 case ETH_SS_STATS: 2826 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2827 i++, data += ETH_GSTRING_LEN) 2828 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2829 2830 for (i = 0; i < adapter->req_tx_queues; i++) { 2831 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2832 data += ETH_GSTRING_LEN; 2833 2834 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2835 data += ETH_GSTRING_LEN; 2836 2837 snprintf(data, ETH_GSTRING_LEN, 2838 "tx%d_dropped_packets", i); 2839 data += ETH_GSTRING_LEN; 2840 } 2841 2842 for (i = 0; i < adapter->req_rx_queues; i++) { 2843 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2844 data += ETH_GSTRING_LEN; 2845 2846 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2847 data += ETH_GSTRING_LEN; 2848 2849 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2850 data += ETH_GSTRING_LEN; 2851 } 2852 break; 2853 2854 case ETH_SS_PRIV_FLAGS: 2855 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2856 strcpy(data + i * ETH_GSTRING_LEN, 2857 ibmvnic_priv_flags[i]); 2858 break; 2859 default: 2860 return; 2861 } 2862 } 2863 2864 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2865 { 2866 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2867 2868 switch (sset) { 2869 case ETH_SS_STATS: 2870 return ARRAY_SIZE(ibmvnic_stats) + 2871 adapter->req_tx_queues * NUM_TX_STATS + 2872 adapter->req_rx_queues * NUM_RX_STATS; 2873 case ETH_SS_PRIV_FLAGS: 2874 return ARRAY_SIZE(ibmvnic_priv_flags); 2875 default: 2876 return -EOPNOTSUPP; 2877 } 2878 } 2879 2880 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2881 struct ethtool_stats *stats, u64 *data) 2882 { 2883 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2884 union ibmvnic_crq crq; 2885 int i, j; 2886 int rc; 2887 2888 memset(&crq, 0, sizeof(crq)); 2889 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2890 crq.request_statistics.cmd = REQUEST_STATISTICS; 2891 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2892 crq.request_statistics.len = 2893 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2894 2895 /* Wait for data to be written */ 2896 reinit_completion(&adapter->stats_done); 2897 rc = ibmvnic_send_crq(adapter, &crq); 2898 if (rc) 2899 return; 2900 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2901 if (rc) 2902 return; 2903 2904 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2905 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 2906 (adapter, ibmvnic_stats[i].offset)); 2907 2908 for (j = 0; j < adapter->req_tx_queues; j++) { 2909 data[i] = adapter->tx_stats_buffers[j].packets; 2910 i++; 2911 data[i] = adapter->tx_stats_buffers[j].bytes; 2912 i++; 2913 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2914 i++; 2915 } 2916 2917 for (j = 0; j < adapter->req_rx_queues; j++) { 2918 data[i] = adapter->rx_stats_buffers[j].packets; 2919 i++; 2920 data[i] = adapter->rx_stats_buffers[j].bytes; 2921 i++; 2922 data[i] = adapter->rx_stats_buffers[j].interrupts; 2923 i++; 2924 } 2925 } 2926 2927 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2928 { 2929 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2930 2931 return adapter->priv_flags; 2932 } 2933 2934 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2935 { 2936 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2937 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2938 2939 if (which_maxes) 2940 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2941 else 2942 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2943 2944 return 0; 2945 } 2946 2947 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2948 .get_drvinfo = ibmvnic_get_drvinfo, 2949 .get_msglevel = ibmvnic_get_msglevel, 2950 .set_msglevel = ibmvnic_set_msglevel, 2951 .get_link = ibmvnic_get_link, 2952 .get_ringparam = ibmvnic_get_ringparam, 2953 .set_ringparam = ibmvnic_set_ringparam, 2954 .get_channels = ibmvnic_get_channels, 2955 .set_channels = ibmvnic_set_channels, 2956 .get_strings = ibmvnic_get_strings, 2957 .get_sset_count = ibmvnic_get_sset_count, 2958 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2959 .get_link_ksettings = ibmvnic_get_link_ksettings, 2960 .get_priv_flags = ibmvnic_get_priv_flags, 2961 .set_priv_flags = ibmvnic_set_priv_flags, 2962 }; 2963 2964 /* Routines for managing CRQs/sCRQs */ 2965 2966 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2967 struct ibmvnic_sub_crq_queue *scrq) 2968 { 2969 int rc; 2970 2971 if (!scrq) { 2972 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 2973 return -EINVAL; 2974 } 2975 2976 if (scrq->irq) { 2977 free_irq(scrq->irq, scrq); 2978 irq_dispose_mapping(scrq->irq); 2979 scrq->irq = 0; 2980 } 2981 2982 if (scrq->msgs) { 2983 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2984 atomic_set(&scrq->used, 0); 2985 scrq->cur = 0; 2986 scrq->ind_buf.index = 0; 2987 } else { 2988 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 2989 return -EINVAL; 2990 } 2991 2992 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2993 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2994 return rc; 2995 } 2996 2997 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2998 { 2999 int i, rc; 3000 3001 if (!adapter->tx_scrq || !adapter->rx_scrq) 3002 return -EINVAL; 3003 3004 for (i = 0; i < adapter->req_tx_queues; i++) { 3005 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3006 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3007 if (rc) 3008 return rc; 3009 } 3010 3011 for (i = 0; i < adapter->req_rx_queues; i++) { 3012 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3013 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3014 if (rc) 3015 return rc; 3016 } 3017 3018 return rc; 3019 } 3020 3021 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3022 struct ibmvnic_sub_crq_queue *scrq, 3023 bool do_h_free) 3024 { 3025 struct device *dev = &adapter->vdev->dev; 3026 long rc; 3027 3028 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3029 3030 if (do_h_free) { 3031 /* Close the sub-crqs */ 3032 do { 3033 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3034 adapter->vdev->unit_address, 3035 scrq->crq_num); 3036 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3037 3038 if (rc) { 3039 netdev_err(adapter->netdev, 3040 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3041 scrq->crq_num, rc); 3042 } 3043 } 3044 3045 dma_free_coherent(dev, 3046 IBMVNIC_IND_ARR_SZ, 3047 scrq->ind_buf.indir_arr, 3048 scrq->ind_buf.indir_dma); 3049 3050 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3051 DMA_BIDIRECTIONAL); 3052 free_pages((unsigned long)scrq->msgs, 2); 3053 kfree(scrq); 3054 } 3055 3056 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3057 *adapter) 3058 { 3059 struct device *dev = &adapter->vdev->dev; 3060 struct ibmvnic_sub_crq_queue *scrq; 3061 int rc; 3062 3063 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3064 if (!scrq) 3065 return NULL; 3066 3067 scrq->msgs = 3068 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3069 if (!scrq->msgs) { 3070 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3071 goto zero_page_failed; 3072 } 3073 3074 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3075 DMA_BIDIRECTIONAL); 3076 if (dma_mapping_error(dev, scrq->msg_token)) { 3077 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3078 goto map_failed; 3079 } 3080 3081 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3082 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3083 3084 if (rc == H_RESOURCE) 3085 rc = ibmvnic_reset_crq(adapter); 3086 3087 if (rc == H_CLOSED) { 3088 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3089 } else if (rc) { 3090 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3091 goto reg_failed; 3092 } 3093 3094 scrq->adapter = adapter; 3095 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3096 scrq->ind_buf.index = 0; 3097 3098 scrq->ind_buf.indir_arr = 3099 dma_alloc_coherent(dev, 3100 IBMVNIC_IND_ARR_SZ, 3101 &scrq->ind_buf.indir_dma, 3102 GFP_KERNEL); 3103 3104 if (!scrq->ind_buf.indir_arr) 3105 goto indir_failed; 3106 3107 spin_lock_init(&scrq->lock); 3108 3109 netdev_dbg(adapter->netdev, 3110 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3111 scrq->crq_num, scrq->hw_irq, scrq->irq); 3112 3113 return scrq; 3114 3115 indir_failed: 3116 do { 3117 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3118 adapter->vdev->unit_address, 3119 scrq->crq_num); 3120 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3121 reg_failed: 3122 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3123 DMA_BIDIRECTIONAL); 3124 map_failed: 3125 free_pages((unsigned long)scrq->msgs, 2); 3126 zero_page_failed: 3127 kfree(scrq); 3128 3129 return NULL; 3130 } 3131 3132 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3133 { 3134 int i; 3135 3136 if (adapter->tx_scrq) { 3137 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3138 if (!adapter->tx_scrq[i]) 3139 continue; 3140 3141 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3142 i); 3143 if (adapter->tx_scrq[i]->irq) { 3144 free_irq(adapter->tx_scrq[i]->irq, 3145 adapter->tx_scrq[i]); 3146 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3147 adapter->tx_scrq[i]->irq = 0; 3148 } 3149 3150 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3151 do_h_free); 3152 } 3153 3154 kfree(adapter->tx_scrq); 3155 adapter->tx_scrq = NULL; 3156 adapter->num_active_tx_scrqs = 0; 3157 } 3158 3159 if (adapter->rx_scrq) { 3160 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3161 if (!adapter->rx_scrq[i]) 3162 continue; 3163 3164 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3165 i); 3166 if (adapter->rx_scrq[i]->irq) { 3167 free_irq(adapter->rx_scrq[i]->irq, 3168 adapter->rx_scrq[i]); 3169 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3170 adapter->rx_scrq[i]->irq = 0; 3171 } 3172 3173 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3174 do_h_free); 3175 } 3176 3177 kfree(adapter->rx_scrq); 3178 adapter->rx_scrq = NULL; 3179 adapter->num_active_rx_scrqs = 0; 3180 } 3181 } 3182 3183 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3184 struct ibmvnic_sub_crq_queue *scrq) 3185 { 3186 struct device *dev = &adapter->vdev->dev; 3187 unsigned long rc; 3188 3189 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3190 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3191 if (rc) 3192 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3193 scrq->hw_irq, rc); 3194 return rc; 3195 } 3196 3197 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3198 struct ibmvnic_sub_crq_queue *scrq) 3199 { 3200 struct device *dev = &adapter->vdev->dev; 3201 unsigned long rc; 3202 3203 if (scrq->hw_irq > 0x100000000ULL) { 3204 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3205 return 1; 3206 } 3207 3208 if (test_bit(0, &adapter->resetting) && 3209 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3210 u64 val = (0xff000000) | scrq->hw_irq; 3211 3212 rc = plpar_hcall_norets(H_EOI, val); 3213 /* H_EOI would fail with rc = H_FUNCTION when running 3214 * in XIVE mode which is expected, but not an error. 3215 */ 3216 if (rc && rc != H_FUNCTION) 3217 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3218 val, rc); 3219 } 3220 3221 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3222 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3223 if (rc) 3224 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3225 scrq->hw_irq, rc); 3226 return rc; 3227 } 3228 3229 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3230 struct ibmvnic_sub_crq_queue *scrq) 3231 { 3232 struct device *dev = &adapter->vdev->dev; 3233 struct ibmvnic_tx_pool *tx_pool; 3234 struct ibmvnic_tx_buff *txbuff; 3235 struct netdev_queue *txq; 3236 union sub_crq *next; 3237 int index; 3238 int i; 3239 3240 restart_loop: 3241 while (pending_scrq(adapter, scrq)) { 3242 unsigned int pool = scrq->pool_index; 3243 int num_entries = 0; 3244 int total_bytes = 0; 3245 int num_packets = 0; 3246 3247 next = ibmvnic_next_scrq(adapter, scrq); 3248 for (i = 0; i < next->tx_comp.num_comps; i++) { 3249 index = be32_to_cpu(next->tx_comp.correlators[i]); 3250 if (index & IBMVNIC_TSO_POOL_MASK) { 3251 tx_pool = &adapter->tso_pool[pool]; 3252 index &= ~IBMVNIC_TSO_POOL_MASK; 3253 } else { 3254 tx_pool = &adapter->tx_pool[pool]; 3255 } 3256 3257 txbuff = &tx_pool->tx_buff[index]; 3258 num_packets++; 3259 num_entries += txbuff->num_entries; 3260 if (txbuff->skb) { 3261 total_bytes += txbuff->skb->len; 3262 if (next->tx_comp.rcs[i]) { 3263 dev_err(dev, "tx error %x\n", 3264 next->tx_comp.rcs[i]); 3265 dev_kfree_skb_irq(txbuff->skb); 3266 } else { 3267 dev_consume_skb_irq(txbuff->skb); 3268 } 3269 txbuff->skb = NULL; 3270 } else { 3271 netdev_warn(adapter->netdev, 3272 "TX completion received with NULL socket buffer\n"); 3273 } 3274 tx_pool->free_map[tx_pool->producer_index] = index; 3275 tx_pool->producer_index = 3276 (tx_pool->producer_index + 1) % 3277 tx_pool->num_buffers; 3278 } 3279 /* remove tx_comp scrq*/ 3280 next->tx_comp.first = 0; 3281 3282 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3283 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3284 3285 if (atomic_sub_return(num_entries, &scrq->used) <= 3286 (adapter->req_tx_entries_per_subcrq / 2) && 3287 __netif_subqueue_stopped(adapter->netdev, 3288 scrq->pool_index)) { 3289 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3290 netdev_dbg(adapter->netdev, "Started queue %d\n", 3291 scrq->pool_index); 3292 } 3293 } 3294 3295 enable_scrq_irq(adapter, scrq); 3296 3297 if (pending_scrq(adapter, scrq)) { 3298 disable_scrq_irq(adapter, scrq); 3299 goto restart_loop; 3300 } 3301 3302 return 0; 3303 } 3304 3305 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3306 { 3307 struct ibmvnic_sub_crq_queue *scrq = instance; 3308 struct ibmvnic_adapter *adapter = scrq->adapter; 3309 3310 disable_scrq_irq(adapter, scrq); 3311 ibmvnic_complete_tx(adapter, scrq); 3312 3313 return IRQ_HANDLED; 3314 } 3315 3316 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3317 { 3318 struct ibmvnic_sub_crq_queue *scrq = instance; 3319 struct ibmvnic_adapter *adapter = scrq->adapter; 3320 3321 /* When booting a kdump kernel we can hit pending interrupts 3322 * prior to completing driver initialization. 3323 */ 3324 if (unlikely(adapter->state != VNIC_OPEN)) 3325 return IRQ_NONE; 3326 3327 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3328 3329 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3330 disable_scrq_irq(adapter, scrq); 3331 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3332 } 3333 3334 return IRQ_HANDLED; 3335 } 3336 3337 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3338 { 3339 struct device *dev = &adapter->vdev->dev; 3340 struct ibmvnic_sub_crq_queue *scrq; 3341 int i = 0, j = 0; 3342 int rc = 0; 3343 3344 for (i = 0; i < adapter->req_tx_queues; i++) { 3345 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3346 i); 3347 scrq = adapter->tx_scrq[i]; 3348 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3349 3350 if (!scrq->irq) { 3351 rc = -EINVAL; 3352 dev_err(dev, "Error mapping irq\n"); 3353 goto req_tx_irq_failed; 3354 } 3355 3356 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3357 adapter->vdev->unit_address, i); 3358 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3359 0, scrq->name, scrq); 3360 3361 if (rc) { 3362 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3363 scrq->irq, rc); 3364 irq_dispose_mapping(scrq->irq); 3365 goto req_tx_irq_failed; 3366 } 3367 } 3368 3369 for (i = 0; i < adapter->req_rx_queues; i++) { 3370 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3371 i); 3372 scrq = adapter->rx_scrq[i]; 3373 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3374 if (!scrq->irq) { 3375 rc = -EINVAL; 3376 dev_err(dev, "Error mapping irq\n"); 3377 goto req_rx_irq_failed; 3378 } 3379 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3380 adapter->vdev->unit_address, i); 3381 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3382 0, scrq->name, scrq); 3383 if (rc) { 3384 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3385 scrq->irq, rc); 3386 irq_dispose_mapping(scrq->irq); 3387 goto req_rx_irq_failed; 3388 } 3389 } 3390 return rc; 3391 3392 req_rx_irq_failed: 3393 for (j = 0; j < i; j++) { 3394 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3395 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3396 } 3397 i = adapter->req_tx_queues; 3398 req_tx_irq_failed: 3399 for (j = 0; j < i; j++) { 3400 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3401 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3402 } 3403 release_sub_crqs(adapter, 1); 3404 return rc; 3405 } 3406 3407 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3408 { 3409 struct device *dev = &adapter->vdev->dev; 3410 struct ibmvnic_sub_crq_queue **allqueues; 3411 int registered_queues = 0; 3412 int total_queues; 3413 int more = 0; 3414 int i; 3415 3416 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3417 3418 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3419 if (!allqueues) 3420 return -1; 3421 3422 for (i = 0; i < total_queues; i++) { 3423 allqueues[i] = init_sub_crq_queue(adapter); 3424 if (!allqueues[i]) { 3425 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3426 break; 3427 } 3428 registered_queues++; 3429 } 3430 3431 /* Make sure we were able to register the minimum number of queues */ 3432 if (registered_queues < 3433 adapter->min_tx_queues + adapter->min_rx_queues) { 3434 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3435 goto tx_failed; 3436 } 3437 3438 /* Distribute the failed allocated queues*/ 3439 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3440 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3441 switch (i % 3) { 3442 case 0: 3443 if (adapter->req_rx_queues > adapter->min_rx_queues) 3444 adapter->req_rx_queues--; 3445 else 3446 more++; 3447 break; 3448 case 1: 3449 if (adapter->req_tx_queues > adapter->min_tx_queues) 3450 adapter->req_tx_queues--; 3451 else 3452 more++; 3453 break; 3454 } 3455 } 3456 3457 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3458 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3459 if (!adapter->tx_scrq) 3460 goto tx_failed; 3461 3462 for (i = 0; i < adapter->req_tx_queues; i++) { 3463 adapter->tx_scrq[i] = allqueues[i]; 3464 adapter->tx_scrq[i]->pool_index = i; 3465 adapter->num_active_tx_scrqs++; 3466 } 3467 3468 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3469 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3470 if (!adapter->rx_scrq) 3471 goto rx_failed; 3472 3473 for (i = 0; i < adapter->req_rx_queues; i++) { 3474 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3475 adapter->rx_scrq[i]->scrq_num = i; 3476 adapter->num_active_rx_scrqs++; 3477 } 3478 3479 kfree(allqueues); 3480 return 0; 3481 3482 rx_failed: 3483 kfree(adapter->tx_scrq); 3484 adapter->tx_scrq = NULL; 3485 tx_failed: 3486 for (i = 0; i < registered_queues; i++) 3487 release_sub_crq_queue(adapter, allqueues[i], 1); 3488 kfree(allqueues); 3489 return -1; 3490 } 3491 3492 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3493 { 3494 struct device *dev = &adapter->vdev->dev; 3495 union ibmvnic_crq crq; 3496 int max_entries; 3497 3498 if (!retry) { 3499 /* Sub-CRQ entries are 32 byte long */ 3500 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3501 3502 if (adapter->min_tx_entries_per_subcrq > entries_page || 3503 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3504 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3505 return; 3506 } 3507 3508 if (adapter->desired.mtu) 3509 adapter->req_mtu = adapter->desired.mtu; 3510 else 3511 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3512 3513 if (!adapter->desired.tx_entries) 3514 adapter->desired.tx_entries = 3515 adapter->max_tx_entries_per_subcrq; 3516 if (!adapter->desired.rx_entries) 3517 adapter->desired.rx_entries = 3518 adapter->max_rx_add_entries_per_subcrq; 3519 3520 max_entries = IBMVNIC_MAX_LTB_SIZE / 3521 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3522 3523 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3524 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3525 adapter->desired.tx_entries = max_entries; 3526 } 3527 3528 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3529 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3530 adapter->desired.rx_entries = max_entries; 3531 } 3532 3533 if (adapter->desired.tx_entries) 3534 adapter->req_tx_entries_per_subcrq = 3535 adapter->desired.tx_entries; 3536 else 3537 adapter->req_tx_entries_per_subcrq = 3538 adapter->max_tx_entries_per_subcrq; 3539 3540 if (adapter->desired.rx_entries) 3541 adapter->req_rx_add_entries_per_subcrq = 3542 adapter->desired.rx_entries; 3543 else 3544 adapter->req_rx_add_entries_per_subcrq = 3545 adapter->max_rx_add_entries_per_subcrq; 3546 3547 if (adapter->desired.tx_queues) 3548 adapter->req_tx_queues = 3549 adapter->desired.tx_queues; 3550 else 3551 adapter->req_tx_queues = 3552 adapter->opt_tx_comp_sub_queues; 3553 3554 if (adapter->desired.rx_queues) 3555 adapter->req_rx_queues = 3556 adapter->desired.rx_queues; 3557 else 3558 adapter->req_rx_queues = 3559 adapter->opt_rx_comp_queues; 3560 3561 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3562 } 3563 3564 memset(&crq, 0, sizeof(crq)); 3565 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3566 crq.request_capability.cmd = REQUEST_CAPABILITY; 3567 3568 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3569 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3570 atomic_inc(&adapter->running_cap_crqs); 3571 ibmvnic_send_crq(adapter, &crq); 3572 3573 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3574 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3575 atomic_inc(&adapter->running_cap_crqs); 3576 ibmvnic_send_crq(adapter, &crq); 3577 3578 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3579 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3580 atomic_inc(&adapter->running_cap_crqs); 3581 ibmvnic_send_crq(adapter, &crq); 3582 3583 crq.request_capability.capability = 3584 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3585 crq.request_capability.number = 3586 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3587 atomic_inc(&adapter->running_cap_crqs); 3588 ibmvnic_send_crq(adapter, &crq); 3589 3590 crq.request_capability.capability = 3591 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3592 crq.request_capability.number = 3593 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3594 atomic_inc(&adapter->running_cap_crqs); 3595 ibmvnic_send_crq(adapter, &crq); 3596 3597 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3598 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3599 atomic_inc(&adapter->running_cap_crqs); 3600 ibmvnic_send_crq(adapter, &crq); 3601 3602 if (adapter->netdev->flags & IFF_PROMISC) { 3603 if (adapter->promisc_supported) { 3604 crq.request_capability.capability = 3605 cpu_to_be16(PROMISC_REQUESTED); 3606 crq.request_capability.number = cpu_to_be64(1); 3607 atomic_inc(&adapter->running_cap_crqs); 3608 ibmvnic_send_crq(adapter, &crq); 3609 } 3610 } else { 3611 crq.request_capability.capability = 3612 cpu_to_be16(PROMISC_REQUESTED); 3613 crq.request_capability.number = cpu_to_be64(0); 3614 atomic_inc(&adapter->running_cap_crqs); 3615 ibmvnic_send_crq(adapter, &crq); 3616 } 3617 } 3618 3619 static int pending_scrq(struct ibmvnic_adapter *adapter, 3620 struct ibmvnic_sub_crq_queue *scrq) 3621 { 3622 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3623 int rc; 3624 3625 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 3626 3627 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3628 * contents of the SCRQ descriptor 3629 */ 3630 dma_rmb(); 3631 3632 return rc; 3633 } 3634 3635 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3636 struct ibmvnic_sub_crq_queue *scrq) 3637 { 3638 union sub_crq *entry; 3639 unsigned long flags; 3640 3641 spin_lock_irqsave(&scrq->lock, flags); 3642 entry = &scrq->msgs[scrq->cur]; 3643 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3644 if (++scrq->cur == scrq->size) 3645 scrq->cur = 0; 3646 } else { 3647 entry = NULL; 3648 } 3649 spin_unlock_irqrestore(&scrq->lock, flags); 3650 3651 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3652 * contents of the SCRQ descriptor 3653 */ 3654 dma_rmb(); 3655 3656 return entry; 3657 } 3658 3659 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3660 { 3661 struct ibmvnic_crq_queue *queue = &adapter->crq; 3662 union ibmvnic_crq *crq; 3663 3664 crq = &queue->msgs[queue->cur]; 3665 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3666 if (++queue->cur == queue->size) 3667 queue->cur = 0; 3668 } else { 3669 crq = NULL; 3670 } 3671 3672 return crq; 3673 } 3674 3675 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3676 { 3677 switch (rc) { 3678 case H_PARAMETER: 3679 dev_warn_ratelimited(dev, 3680 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3681 func, rc); 3682 break; 3683 case H_CLOSED: 3684 dev_warn_ratelimited(dev, 3685 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3686 func, rc); 3687 break; 3688 default: 3689 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3690 break; 3691 } 3692 } 3693 3694 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3695 u64 remote_handle, u64 ioba, u64 num_entries) 3696 { 3697 unsigned int ua = adapter->vdev->unit_address; 3698 struct device *dev = &adapter->vdev->dev; 3699 int rc; 3700 3701 /* Make sure the hypervisor sees the complete request */ 3702 dma_wmb(); 3703 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3704 cpu_to_be64(remote_handle), 3705 ioba, num_entries); 3706 3707 if (rc) 3708 print_subcrq_error(dev, rc, __func__); 3709 3710 return rc; 3711 } 3712 3713 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3714 union ibmvnic_crq *crq) 3715 { 3716 unsigned int ua = adapter->vdev->unit_address; 3717 struct device *dev = &adapter->vdev->dev; 3718 u64 *u64_crq = (u64 *)crq; 3719 int rc; 3720 3721 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3722 (unsigned long)cpu_to_be64(u64_crq[0]), 3723 (unsigned long)cpu_to_be64(u64_crq[1])); 3724 3725 if (!adapter->crq.active && 3726 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3727 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3728 return -EINVAL; 3729 } 3730 3731 /* Make sure the hypervisor sees the complete request */ 3732 dma_wmb(); 3733 3734 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3735 cpu_to_be64(u64_crq[0]), 3736 cpu_to_be64(u64_crq[1])); 3737 3738 if (rc) { 3739 if (rc == H_CLOSED) { 3740 dev_warn(dev, "CRQ Queue closed\n"); 3741 /* do not reset, report the fail, wait for passive init from server */ 3742 } 3743 3744 dev_warn(dev, "Send error (rc=%d)\n", rc); 3745 } 3746 3747 return rc; 3748 } 3749 3750 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3751 { 3752 struct device *dev = &adapter->vdev->dev; 3753 union ibmvnic_crq crq; 3754 int retries = 100; 3755 int rc; 3756 3757 memset(&crq, 0, sizeof(crq)); 3758 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3759 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3760 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3761 3762 do { 3763 rc = ibmvnic_send_crq(adapter, &crq); 3764 if (rc != H_CLOSED) 3765 break; 3766 retries--; 3767 msleep(50); 3768 3769 } while (retries > 0); 3770 3771 if (rc) { 3772 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3773 return rc; 3774 } 3775 3776 return 0; 3777 } 3778 3779 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3780 { 3781 union ibmvnic_crq crq; 3782 3783 memset(&crq, 0, sizeof(crq)); 3784 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3785 crq.version_exchange.cmd = VERSION_EXCHANGE; 3786 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3787 3788 return ibmvnic_send_crq(adapter, &crq); 3789 } 3790 3791 struct vnic_login_client_data { 3792 u8 type; 3793 __be16 len; 3794 char name[]; 3795 } __packed; 3796 3797 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3798 { 3799 int len; 3800 3801 /* Calculate the amount of buffer space needed for the 3802 * vnic client data in the login buffer. There are four entries, 3803 * OS name, LPAR name, device name, and a null last entry. 3804 */ 3805 len = 4 * sizeof(struct vnic_login_client_data); 3806 len += 6; /* "Linux" plus NULL */ 3807 len += strlen(utsname()->nodename) + 1; 3808 len += strlen(adapter->netdev->name) + 1; 3809 3810 return len; 3811 } 3812 3813 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3814 struct vnic_login_client_data *vlcd) 3815 { 3816 const char *os_name = "Linux"; 3817 int len; 3818 3819 /* Type 1 - LPAR OS */ 3820 vlcd->type = 1; 3821 len = strlen(os_name) + 1; 3822 vlcd->len = cpu_to_be16(len); 3823 strncpy(vlcd->name, os_name, len); 3824 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3825 3826 /* Type 2 - LPAR name */ 3827 vlcd->type = 2; 3828 len = strlen(utsname()->nodename) + 1; 3829 vlcd->len = cpu_to_be16(len); 3830 strncpy(vlcd->name, utsname()->nodename, len); 3831 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3832 3833 /* Type 3 - device name */ 3834 vlcd->type = 3; 3835 len = strlen(adapter->netdev->name) + 1; 3836 vlcd->len = cpu_to_be16(len); 3837 strncpy(vlcd->name, adapter->netdev->name, len); 3838 } 3839 3840 static int send_login(struct ibmvnic_adapter *adapter) 3841 { 3842 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3843 struct ibmvnic_login_buffer *login_buffer; 3844 struct device *dev = &adapter->vdev->dev; 3845 struct vnic_login_client_data *vlcd; 3846 dma_addr_t rsp_buffer_token; 3847 dma_addr_t buffer_token; 3848 size_t rsp_buffer_size; 3849 union ibmvnic_crq crq; 3850 int client_data_len; 3851 size_t buffer_size; 3852 __be64 *tx_list_p; 3853 __be64 *rx_list_p; 3854 int rc; 3855 int i; 3856 3857 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3858 netdev_err(adapter->netdev, 3859 "RX or TX queues are not allocated, device login failed\n"); 3860 return -1; 3861 } 3862 3863 release_login_buffer(adapter); 3864 release_login_rsp_buffer(adapter); 3865 3866 client_data_len = vnic_client_data_len(adapter); 3867 3868 buffer_size = 3869 sizeof(struct ibmvnic_login_buffer) + 3870 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3871 client_data_len; 3872 3873 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3874 if (!login_buffer) 3875 goto buf_alloc_failed; 3876 3877 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3878 DMA_TO_DEVICE); 3879 if (dma_mapping_error(dev, buffer_token)) { 3880 dev_err(dev, "Couldn't map login buffer\n"); 3881 goto buf_map_failed; 3882 } 3883 3884 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3885 sizeof(u64) * adapter->req_tx_queues + 3886 sizeof(u64) * adapter->req_rx_queues + 3887 sizeof(u64) * adapter->req_rx_queues + 3888 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3889 3890 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3891 if (!login_rsp_buffer) 3892 goto buf_rsp_alloc_failed; 3893 3894 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3895 rsp_buffer_size, DMA_FROM_DEVICE); 3896 if (dma_mapping_error(dev, rsp_buffer_token)) { 3897 dev_err(dev, "Couldn't map login rsp buffer\n"); 3898 goto buf_rsp_map_failed; 3899 } 3900 3901 adapter->login_buf = login_buffer; 3902 adapter->login_buf_token = buffer_token; 3903 adapter->login_buf_sz = buffer_size; 3904 adapter->login_rsp_buf = login_rsp_buffer; 3905 adapter->login_rsp_buf_token = rsp_buffer_token; 3906 adapter->login_rsp_buf_sz = rsp_buffer_size; 3907 3908 login_buffer->len = cpu_to_be32(buffer_size); 3909 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3910 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3911 login_buffer->off_txcomp_subcrqs = 3912 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3913 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3914 login_buffer->off_rxcomp_subcrqs = 3915 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3916 sizeof(u64) * adapter->req_tx_queues); 3917 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3918 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3919 3920 tx_list_p = (__be64 *)((char *)login_buffer + 3921 sizeof(struct ibmvnic_login_buffer)); 3922 rx_list_p = (__be64 *)((char *)login_buffer + 3923 sizeof(struct ibmvnic_login_buffer) + 3924 sizeof(u64) * adapter->req_tx_queues); 3925 3926 for (i = 0; i < adapter->req_tx_queues; i++) { 3927 if (adapter->tx_scrq[i]) { 3928 tx_list_p[i] = 3929 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 3930 } 3931 } 3932 3933 for (i = 0; i < adapter->req_rx_queues; i++) { 3934 if (adapter->rx_scrq[i]) { 3935 rx_list_p[i] = 3936 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 3937 } 3938 } 3939 3940 /* Insert vNIC login client data */ 3941 vlcd = (struct vnic_login_client_data *) 3942 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3943 login_buffer->client_data_offset = 3944 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3945 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3946 3947 vnic_add_client_data(adapter, vlcd); 3948 3949 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3950 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3951 netdev_dbg(adapter->netdev, "%016lx\n", 3952 ((unsigned long *)(adapter->login_buf))[i]); 3953 } 3954 3955 memset(&crq, 0, sizeof(crq)); 3956 crq.login.first = IBMVNIC_CRQ_CMD; 3957 crq.login.cmd = LOGIN; 3958 crq.login.ioba = cpu_to_be32(buffer_token); 3959 crq.login.len = cpu_to_be32(buffer_size); 3960 3961 adapter->login_pending = true; 3962 rc = ibmvnic_send_crq(adapter, &crq); 3963 if (rc) { 3964 adapter->login_pending = false; 3965 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 3966 goto buf_rsp_map_failed; 3967 } 3968 3969 return 0; 3970 3971 buf_rsp_map_failed: 3972 kfree(login_rsp_buffer); 3973 adapter->login_rsp_buf = NULL; 3974 buf_rsp_alloc_failed: 3975 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3976 buf_map_failed: 3977 kfree(login_buffer); 3978 adapter->login_buf = NULL; 3979 buf_alloc_failed: 3980 return -1; 3981 } 3982 3983 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3984 u32 len, u8 map_id) 3985 { 3986 union ibmvnic_crq crq; 3987 3988 memset(&crq, 0, sizeof(crq)); 3989 crq.request_map.first = IBMVNIC_CRQ_CMD; 3990 crq.request_map.cmd = REQUEST_MAP; 3991 crq.request_map.map_id = map_id; 3992 crq.request_map.ioba = cpu_to_be32(addr); 3993 crq.request_map.len = cpu_to_be32(len); 3994 return ibmvnic_send_crq(adapter, &crq); 3995 } 3996 3997 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3998 { 3999 union ibmvnic_crq crq; 4000 4001 memset(&crq, 0, sizeof(crq)); 4002 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4003 crq.request_unmap.cmd = REQUEST_UNMAP; 4004 crq.request_unmap.map_id = map_id; 4005 return ibmvnic_send_crq(adapter, &crq); 4006 } 4007 4008 static void send_query_map(struct ibmvnic_adapter *adapter) 4009 { 4010 union ibmvnic_crq crq; 4011 4012 memset(&crq, 0, sizeof(crq)); 4013 crq.query_map.first = IBMVNIC_CRQ_CMD; 4014 crq.query_map.cmd = QUERY_MAP; 4015 ibmvnic_send_crq(adapter, &crq); 4016 } 4017 4018 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4019 static void send_query_cap(struct ibmvnic_adapter *adapter) 4020 { 4021 union ibmvnic_crq crq; 4022 4023 atomic_set(&adapter->running_cap_crqs, 0); 4024 memset(&crq, 0, sizeof(crq)); 4025 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4026 crq.query_capability.cmd = QUERY_CAPABILITY; 4027 4028 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4029 atomic_inc(&adapter->running_cap_crqs); 4030 ibmvnic_send_crq(adapter, &crq); 4031 4032 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 4033 atomic_inc(&adapter->running_cap_crqs); 4034 ibmvnic_send_crq(adapter, &crq); 4035 4036 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 4037 atomic_inc(&adapter->running_cap_crqs); 4038 ibmvnic_send_crq(adapter, &crq); 4039 4040 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 4041 atomic_inc(&adapter->running_cap_crqs); 4042 ibmvnic_send_crq(adapter, &crq); 4043 4044 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4045 atomic_inc(&adapter->running_cap_crqs); 4046 ibmvnic_send_crq(adapter, &crq); 4047 4048 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4049 atomic_inc(&adapter->running_cap_crqs); 4050 ibmvnic_send_crq(adapter, &crq); 4051 4052 crq.query_capability.capability = 4053 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4054 atomic_inc(&adapter->running_cap_crqs); 4055 ibmvnic_send_crq(adapter, &crq); 4056 4057 crq.query_capability.capability = 4058 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4059 atomic_inc(&adapter->running_cap_crqs); 4060 ibmvnic_send_crq(adapter, &crq); 4061 4062 crq.query_capability.capability = 4063 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4064 atomic_inc(&adapter->running_cap_crqs); 4065 ibmvnic_send_crq(adapter, &crq); 4066 4067 crq.query_capability.capability = 4068 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4069 atomic_inc(&adapter->running_cap_crqs); 4070 ibmvnic_send_crq(adapter, &crq); 4071 4072 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4073 atomic_inc(&adapter->running_cap_crqs); 4074 ibmvnic_send_crq(adapter, &crq); 4075 4076 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4077 atomic_inc(&adapter->running_cap_crqs); 4078 ibmvnic_send_crq(adapter, &crq); 4079 4080 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4081 atomic_inc(&adapter->running_cap_crqs); 4082 ibmvnic_send_crq(adapter, &crq); 4083 4084 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4085 atomic_inc(&adapter->running_cap_crqs); 4086 ibmvnic_send_crq(adapter, &crq); 4087 4088 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4089 atomic_inc(&adapter->running_cap_crqs); 4090 ibmvnic_send_crq(adapter, &crq); 4091 4092 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4093 atomic_inc(&adapter->running_cap_crqs); 4094 ibmvnic_send_crq(adapter, &crq); 4095 4096 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4097 atomic_inc(&adapter->running_cap_crqs); 4098 ibmvnic_send_crq(adapter, &crq); 4099 4100 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4101 atomic_inc(&adapter->running_cap_crqs); 4102 ibmvnic_send_crq(adapter, &crq); 4103 4104 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4105 atomic_inc(&adapter->running_cap_crqs); 4106 ibmvnic_send_crq(adapter, &crq); 4107 4108 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4109 atomic_inc(&adapter->running_cap_crqs); 4110 ibmvnic_send_crq(adapter, &crq); 4111 4112 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4113 atomic_inc(&adapter->running_cap_crqs); 4114 ibmvnic_send_crq(adapter, &crq); 4115 4116 crq.query_capability.capability = 4117 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4118 atomic_inc(&adapter->running_cap_crqs); 4119 ibmvnic_send_crq(adapter, &crq); 4120 4121 crq.query_capability.capability = 4122 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4123 atomic_inc(&adapter->running_cap_crqs); 4124 ibmvnic_send_crq(adapter, &crq); 4125 4126 crq.query_capability.capability = 4127 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4128 atomic_inc(&adapter->running_cap_crqs); 4129 ibmvnic_send_crq(adapter, &crq); 4130 4131 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4132 atomic_inc(&adapter->running_cap_crqs); 4133 ibmvnic_send_crq(adapter, &crq); 4134 } 4135 4136 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4137 { 4138 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4139 struct device *dev = &adapter->vdev->dev; 4140 union ibmvnic_crq crq; 4141 4142 adapter->ip_offload_tok = 4143 dma_map_single(dev, 4144 &adapter->ip_offload_buf, 4145 buf_sz, 4146 DMA_FROM_DEVICE); 4147 4148 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4149 if (!firmware_has_feature(FW_FEATURE_CMO)) 4150 dev_err(dev, "Couldn't map offload buffer\n"); 4151 return; 4152 } 4153 4154 memset(&crq, 0, sizeof(crq)); 4155 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4156 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4157 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4158 crq.query_ip_offload.ioba = 4159 cpu_to_be32(adapter->ip_offload_tok); 4160 4161 ibmvnic_send_crq(adapter, &crq); 4162 } 4163 4164 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4165 { 4166 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4167 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4168 struct device *dev = &adapter->vdev->dev; 4169 netdev_features_t old_hw_features = 0; 4170 union ibmvnic_crq crq; 4171 4172 adapter->ip_offload_ctrl_tok = 4173 dma_map_single(dev, 4174 ctrl_buf, 4175 sizeof(adapter->ip_offload_ctrl), 4176 DMA_TO_DEVICE); 4177 4178 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4179 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4180 return; 4181 } 4182 4183 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4184 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4185 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4186 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4187 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4188 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4189 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4190 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4191 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4192 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4193 4194 /* large_rx disabled for now, additional features needed */ 4195 ctrl_buf->large_rx_ipv4 = 0; 4196 ctrl_buf->large_rx_ipv6 = 0; 4197 4198 if (adapter->state != VNIC_PROBING) { 4199 old_hw_features = adapter->netdev->hw_features; 4200 adapter->netdev->hw_features = 0; 4201 } 4202 4203 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4204 4205 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4206 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4207 4208 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4209 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4210 4211 if ((adapter->netdev->features & 4212 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4213 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4214 4215 if (buf->large_tx_ipv4) 4216 adapter->netdev->hw_features |= NETIF_F_TSO; 4217 if (buf->large_tx_ipv6) 4218 adapter->netdev->hw_features |= NETIF_F_TSO6; 4219 4220 if (adapter->state == VNIC_PROBING) { 4221 adapter->netdev->features |= adapter->netdev->hw_features; 4222 } else if (old_hw_features != adapter->netdev->hw_features) { 4223 netdev_features_t tmp = 0; 4224 4225 /* disable features no longer supported */ 4226 adapter->netdev->features &= adapter->netdev->hw_features; 4227 /* turn on features now supported if previously enabled */ 4228 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4229 adapter->netdev->hw_features; 4230 adapter->netdev->features |= 4231 tmp & adapter->netdev->wanted_features; 4232 } 4233 4234 memset(&crq, 0, sizeof(crq)); 4235 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4236 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4237 crq.control_ip_offload.len = 4238 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4239 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4240 ibmvnic_send_crq(adapter, &crq); 4241 } 4242 4243 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4244 struct ibmvnic_adapter *adapter) 4245 { 4246 struct device *dev = &adapter->vdev->dev; 4247 4248 if (crq->get_vpd_size_rsp.rc.code) { 4249 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4250 crq->get_vpd_size_rsp.rc.code); 4251 complete(&adapter->fw_done); 4252 return; 4253 } 4254 4255 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4256 complete(&adapter->fw_done); 4257 } 4258 4259 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4260 struct ibmvnic_adapter *adapter) 4261 { 4262 struct device *dev = &adapter->vdev->dev; 4263 unsigned char *substr = NULL; 4264 u8 fw_level_len = 0; 4265 4266 memset(adapter->fw_version, 0, 32); 4267 4268 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4269 DMA_FROM_DEVICE); 4270 4271 if (crq->get_vpd_rsp.rc.code) { 4272 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4273 crq->get_vpd_rsp.rc.code); 4274 goto complete; 4275 } 4276 4277 /* get the position of the firmware version info 4278 * located after the ASCII 'RM' substring in the buffer 4279 */ 4280 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4281 if (!substr) { 4282 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4283 goto complete; 4284 } 4285 4286 /* get length of firmware level ASCII substring */ 4287 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4288 fw_level_len = *(substr + 2); 4289 } else { 4290 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4291 goto complete; 4292 } 4293 4294 /* copy firmware version string from vpd into adapter */ 4295 if ((substr + 3 + fw_level_len) < 4296 (adapter->vpd->buff + adapter->vpd->len)) { 4297 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4298 } else { 4299 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4300 } 4301 4302 complete: 4303 if (adapter->fw_version[0] == '\0') 4304 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4305 complete(&adapter->fw_done); 4306 } 4307 4308 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4309 { 4310 struct device *dev = &adapter->vdev->dev; 4311 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4312 int i; 4313 4314 dma_unmap_single(dev, adapter->ip_offload_tok, 4315 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4316 4317 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4318 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4319 netdev_dbg(adapter->netdev, "%016lx\n", 4320 ((unsigned long *)(buf))[i]); 4321 4322 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4323 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4324 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4325 buf->tcp_ipv4_chksum); 4326 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4327 buf->tcp_ipv6_chksum); 4328 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4329 buf->udp_ipv4_chksum); 4330 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4331 buf->udp_ipv6_chksum); 4332 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4333 buf->large_tx_ipv4); 4334 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4335 buf->large_tx_ipv6); 4336 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4337 buf->large_rx_ipv4); 4338 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4339 buf->large_rx_ipv6); 4340 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4341 buf->max_ipv4_header_size); 4342 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4343 buf->max_ipv6_header_size); 4344 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4345 buf->max_tcp_header_size); 4346 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4347 buf->max_udp_header_size); 4348 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4349 buf->max_large_tx_size); 4350 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4351 buf->max_large_rx_size); 4352 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4353 buf->ipv6_extension_header); 4354 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4355 buf->tcp_pseudosum_req); 4356 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4357 buf->num_ipv6_ext_headers); 4358 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4359 buf->off_ipv6_ext_headers); 4360 4361 send_control_ip_offload(adapter); 4362 } 4363 4364 static const char *ibmvnic_fw_err_cause(u16 cause) 4365 { 4366 switch (cause) { 4367 case ADAPTER_PROBLEM: 4368 return "adapter problem"; 4369 case BUS_PROBLEM: 4370 return "bus problem"; 4371 case FW_PROBLEM: 4372 return "firmware problem"; 4373 case DD_PROBLEM: 4374 return "device driver problem"; 4375 case EEH_RECOVERY: 4376 return "EEH recovery"; 4377 case FW_UPDATED: 4378 return "firmware updated"; 4379 case LOW_MEMORY: 4380 return "low Memory"; 4381 default: 4382 return "unknown"; 4383 } 4384 } 4385 4386 static void handle_error_indication(union ibmvnic_crq *crq, 4387 struct ibmvnic_adapter *adapter) 4388 { 4389 struct device *dev = &adapter->vdev->dev; 4390 u16 cause; 4391 4392 cause = be16_to_cpu(crq->error_indication.error_cause); 4393 4394 dev_warn_ratelimited(dev, 4395 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4396 crq->error_indication.flags 4397 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4398 ibmvnic_fw_err_cause(cause)); 4399 4400 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4401 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4402 else 4403 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4404 } 4405 4406 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4407 struct ibmvnic_adapter *adapter) 4408 { 4409 struct net_device *netdev = adapter->netdev; 4410 struct device *dev = &adapter->vdev->dev; 4411 long rc; 4412 4413 rc = crq->change_mac_addr_rsp.rc.code; 4414 if (rc) { 4415 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4416 goto out; 4417 } 4418 /* crq->change_mac_addr.mac_addr is the requested one 4419 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4420 */ 4421 ether_addr_copy(netdev->dev_addr, 4422 &crq->change_mac_addr_rsp.mac_addr[0]); 4423 ether_addr_copy(adapter->mac_addr, 4424 &crq->change_mac_addr_rsp.mac_addr[0]); 4425 out: 4426 complete(&adapter->fw_done); 4427 return rc; 4428 } 4429 4430 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4431 struct ibmvnic_adapter *adapter) 4432 { 4433 struct device *dev = &adapter->vdev->dev; 4434 u64 *req_value; 4435 char *name; 4436 4437 atomic_dec(&adapter->running_cap_crqs); 4438 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4439 case REQ_TX_QUEUES: 4440 req_value = &adapter->req_tx_queues; 4441 name = "tx"; 4442 break; 4443 case REQ_RX_QUEUES: 4444 req_value = &adapter->req_rx_queues; 4445 name = "rx"; 4446 break; 4447 case REQ_RX_ADD_QUEUES: 4448 req_value = &adapter->req_rx_add_queues; 4449 name = "rx_add"; 4450 break; 4451 case REQ_TX_ENTRIES_PER_SUBCRQ: 4452 req_value = &adapter->req_tx_entries_per_subcrq; 4453 name = "tx_entries_per_subcrq"; 4454 break; 4455 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4456 req_value = &adapter->req_rx_add_entries_per_subcrq; 4457 name = "rx_add_entries_per_subcrq"; 4458 break; 4459 case REQ_MTU: 4460 req_value = &adapter->req_mtu; 4461 name = "mtu"; 4462 break; 4463 case PROMISC_REQUESTED: 4464 req_value = &adapter->promisc; 4465 name = "promisc"; 4466 break; 4467 default: 4468 dev_err(dev, "Got invalid cap request rsp %d\n", 4469 crq->request_capability.capability); 4470 return; 4471 } 4472 4473 switch (crq->request_capability_rsp.rc.code) { 4474 case SUCCESS: 4475 break; 4476 case PARTIALSUCCESS: 4477 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4478 *req_value, 4479 (long)be64_to_cpu(crq->request_capability_rsp.number), 4480 name); 4481 4482 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4483 REQ_MTU) { 4484 pr_err("mtu of %llu is not supported. Reverting.\n", 4485 *req_value); 4486 *req_value = adapter->fallback.mtu; 4487 } else { 4488 *req_value = 4489 be64_to_cpu(crq->request_capability_rsp.number); 4490 } 4491 4492 send_request_cap(adapter, 1); 4493 return; 4494 default: 4495 dev_err(dev, "Error %d in request cap rsp\n", 4496 crq->request_capability_rsp.rc.code); 4497 return; 4498 } 4499 4500 /* Done receiving requested capabilities, query IP offload support */ 4501 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4502 adapter->wait_capability = false; 4503 send_query_ip_offload(adapter); 4504 } 4505 } 4506 4507 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4508 struct ibmvnic_adapter *adapter) 4509 { 4510 struct device *dev = &adapter->vdev->dev; 4511 struct net_device *netdev = adapter->netdev; 4512 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4513 struct ibmvnic_login_buffer *login = adapter->login_buf; 4514 u64 *tx_handle_array; 4515 u64 *rx_handle_array; 4516 int num_tx_pools; 4517 int num_rx_pools; 4518 u64 *size_array; 4519 int i; 4520 4521 /* CHECK: Test/set of login_pending does not need to be atomic 4522 * because only ibmvnic_tasklet tests/clears this. 4523 */ 4524 if (!adapter->login_pending) { 4525 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4526 return 0; 4527 } 4528 adapter->login_pending = false; 4529 4530 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4531 DMA_TO_DEVICE); 4532 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4533 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4534 4535 /* If the number of queues requested can't be allocated by the 4536 * server, the login response will return with code 1. We will need 4537 * to resend the login buffer with fewer queues requested. 4538 */ 4539 if (login_rsp_crq->generic.rc.code) { 4540 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4541 complete(&adapter->init_done); 4542 return 0; 4543 } 4544 4545 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4546 4547 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4548 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4549 netdev_dbg(adapter->netdev, "%016lx\n", 4550 ((unsigned long *)(adapter->login_rsp_buf))[i]); 4551 } 4552 4553 /* Sanity checks */ 4554 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4555 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4556 adapter->req_rx_add_queues != 4557 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4558 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4559 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4560 return -EIO; 4561 } 4562 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4563 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4564 /* variable buffer sizes are not supported, so just read the 4565 * first entry. 4566 */ 4567 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4568 4569 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4570 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4571 4572 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4573 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4574 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4575 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4576 4577 for (i = 0; i < num_tx_pools; i++) 4578 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4579 4580 for (i = 0; i < num_rx_pools; i++) 4581 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4582 4583 adapter->num_active_tx_scrqs = num_tx_pools; 4584 adapter->num_active_rx_scrqs = num_rx_pools; 4585 release_login_rsp_buffer(adapter); 4586 release_login_buffer(adapter); 4587 complete(&adapter->init_done); 4588 4589 return 0; 4590 } 4591 4592 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4593 struct ibmvnic_adapter *adapter) 4594 { 4595 struct device *dev = &adapter->vdev->dev; 4596 long rc; 4597 4598 rc = crq->request_unmap_rsp.rc.code; 4599 if (rc) 4600 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4601 } 4602 4603 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4604 struct ibmvnic_adapter *adapter) 4605 { 4606 struct net_device *netdev = adapter->netdev; 4607 struct device *dev = &adapter->vdev->dev; 4608 long rc; 4609 4610 rc = crq->query_map_rsp.rc.code; 4611 if (rc) { 4612 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4613 return; 4614 } 4615 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4616 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4617 crq->query_map_rsp.free_pages); 4618 } 4619 4620 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4621 struct ibmvnic_adapter *adapter) 4622 { 4623 struct net_device *netdev = adapter->netdev; 4624 struct device *dev = &adapter->vdev->dev; 4625 long rc; 4626 4627 atomic_dec(&adapter->running_cap_crqs); 4628 netdev_dbg(netdev, "Outstanding queries: %d\n", 4629 atomic_read(&adapter->running_cap_crqs)); 4630 rc = crq->query_capability.rc.code; 4631 if (rc) { 4632 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4633 goto out; 4634 } 4635 4636 switch (be16_to_cpu(crq->query_capability.capability)) { 4637 case MIN_TX_QUEUES: 4638 adapter->min_tx_queues = 4639 be64_to_cpu(crq->query_capability.number); 4640 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4641 adapter->min_tx_queues); 4642 break; 4643 case MIN_RX_QUEUES: 4644 adapter->min_rx_queues = 4645 be64_to_cpu(crq->query_capability.number); 4646 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4647 adapter->min_rx_queues); 4648 break; 4649 case MIN_RX_ADD_QUEUES: 4650 adapter->min_rx_add_queues = 4651 be64_to_cpu(crq->query_capability.number); 4652 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4653 adapter->min_rx_add_queues); 4654 break; 4655 case MAX_TX_QUEUES: 4656 adapter->max_tx_queues = 4657 be64_to_cpu(crq->query_capability.number); 4658 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4659 adapter->max_tx_queues); 4660 break; 4661 case MAX_RX_QUEUES: 4662 adapter->max_rx_queues = 4663 be64_to_cpu(crq->query_capability.number); 4664 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4665 adapter->max_rx_queues); 4666 break; 4667 case MAX_RX_ADD_QUEUES: 4668 adapter->max_rx_add_queues = 4669 be64_to_cpu(crq->query_capability.number); 4670 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4671 adapter->max_rx_add_queues); 4672 break; 4673 case MIN_TX_ENTRIES_PER_SUBCRQ: 4674 adapter->min_tx_entries_per_subcrq = 4675 be64_to_cpu(crq->query_capability.number); 4676 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4677 adapter->min_tx_entries_per_subcrq); 4678 break; 4679 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4680 adapter->min_rx_add_entries_per_subcrq = 4681 be64_to_cpu(crq->query_capability.number); 4682 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4683 adapter->min_rx_add_entries_per_subcrq); 4684 break; 4685 case MAX_TX_ENTRIES_PER_SUBCRQ: 4686 adapter->max_tx_entries_per_subcrq = 4687 be64_to_cpu(crq->query_capability.number); 4688 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4689 adapter->max_tx_entries_per_subcrq); 4690 break; 4691 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4692 adapter->max_rx_add_entries_per_subcrq = 4693 be64_to_cpu(crq->query_capability.number); 4694 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4695 adapter->max_rx_add_entries_per_subcrq); 4696 break; 4697 case TCP_IP_OFFLOAD: 4698 adapter->tcp_ip_offload = 4699 be64_to_cpu(crq->query_capability.number); 4700 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4701 adapter->tcp_ip_offload); 4702 break; 4703 case PROMISC_SUPPORTED: 4704 adapter->promisc_supported = 4705 be64_to_cpu(crq->query_capability.number); 4706 netdev_dbg(netdev, "promisc_supported = %lld\n", 4707 adapter->promisc_supported); 4708 break; 4709 case MIN_MTU: 4710 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4711 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4712 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4713 break; 4714 case MAX_MTU: 4715 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4716 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4717 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4718 break; 4719 case MAX_MULTICAST_FILTERS: 4720 adapter->max_multicast_filters = 4721 be64_to_cpu(crq->query_capability.number); 4722 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4723 adapter->max_multicast_filters); 4724 break; 4725 case VLAN_HEADER_INSERTION: 4726 adapter->vlan_header_insertion = 4727 be64_to_cpu(crq->query_capability.number); 4728 if (adapter->vlan_header_insertion) 4729 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4730 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4731 adapter->vlan_header_insertion); 4732 break; 4733 case RX_VLAN_HEADER_INSERTION: 4734 adapter->rx_vlan_header_insertion = 4735 be64_to_cpu(crq->query_capability.number); 4736 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4737 adapter->rx_vlan_header_insertion); 4738 break; 4739 case MAX_TX_SG_ENTRIES: 4740 adapter->max_tx_sg_entries = 4741 be64_to_cpu(crq->query_capability.number); 4742 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4743 adapter->max_tx_sg_entries); 4744 break; 4745 case RX_SG_SUPPORTED: 4746 adapter->rx_sg_supported = 4747 be64_to_cpu(crq->query_capability.number); 4748 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4749 adapter->rx_sg_supported); 4750 break; 4751 case OPT_TX_COMP_SUB_QUEUES: 4752 adapter->opt_tx_comp_sub_queues = 4753 be64_to_cpu(crq->query_capability.number); 4754 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4755 adapter->opt_tx_comp_sub_queues); 4756 break; 4757 case OPT_RX_COMP_QUEUES: 4758 adapter->opt_rx_comp_queues = 4759 be64_to_cpu(crq->query_capability.number); 4760 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4761 adapter->opt_rx_comp_queues); 4762 break; 4763 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4764 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4765 be64_to_cpu(crq->query_capability.number); 4766 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4767 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4768 break; 4769 case OPT_TX_ENTRIES_PER_SUBCRQ: 4770 adapter->opt_tx_entries_per_subcrq = 4771 be64_to_cpu(crq->query_capability.number); 4772 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4773 adapter->opt_tx_entries_per_subcrq); 4774 break; 4775 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4776 adapter->opt_rxba_entries_per_subcrq = 4777 be64_to_cpu(crq->query_capability.number); 4778 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4779 adapter->opt_rxba_entries_per_subcrq); 4780 break; 4781 case TX_RX_DESC_REQ: 4782 adapter->tx_rx_desc_req = crq->query_capability.number; 4783 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4784 adapter->tx_rx_desc_req); 4785 break; 4786 4787 default: 4788 netdev_err(netdev, "Got invalid cap rsp %d\n", 4789 crq->query_capability.capability); 4790 } 4791 4792 out: 4793 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4794 adapter->wait_capability = false; 4795 send_request_cap(adapter, 0); 4796 } 4797 } 4798 4799 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4800 { 4801 union ibmvnic_crq crq; 4802 int rc; 4803 4804 memset(&crq, 0, sizeof(crq)); 4805 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4806 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4807 4808 mutex_lock(&adapter->fw_lock); 4809 adapter->fw_done_rc = 0; 4810 reinit_completion(&adapter->fw_done); 4811 4812 rc = ibmvnic_send_crq(adapter, &crq); 4813 if (rc) { 4814 mutex_unlock(&adapter->fw_lock); 4815 return rc; 4816 } 4817 4818 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4819 if (rc) { 4820 mutex_unlock(&adapter->fw_lock); 4821 return rc; 4822 } 4823 4824 mutex_unlock(&adapter->fw_lock); 4825 return adapter->fw_done_rc ? -EIO : 0; 4826 } 4827 4828 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4829 struct ibmvnic_adapter *adapter) 4830 { 4831 struct net_device *netdev = adapter->netdev; 4832 int rc; 4833 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4834 4835 rc = crq->query_phys_parms_rsp.rc.code; 4836 if (rc) { 4837 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4838 return rc; 4839 } 4840 switch (rspeed) { 4841 case IBMVNIC_10MBPS: 4842 adapter->speed = SPEED_10; 4843 break; 4844 case IBMVNIC_100MBPS: 4845 adapter->speed = SPEED_100; 4846 break; 4847 case IBMVNIC_1GBPS: 4848 adapter->speed = SPEED_1000; 4849 break; 4850 case IBMVNIC_10GBPS: 4851 adapter->speed = SPEED_10000; 4852 break; 4853 case IBMVNIC_25GBPS: 4854 adapter->speed = SPEED_25000; 4855 break; 4856 case IBMVNIC_40GBPS: 4857 adapter->speed = SPEED_40000; 4858 break; 4859 case IBMVNIC_50GBPS: 4860 adapter->speed = SPEED_50000; 4861 break; 4862 case IBMVNIC_100GBPS: 4863 adapter->speed = SPEED_100000; 4864 break; 4865 case IBMVNIC_200GBPS: 4866 adapter->speed = SPEED_200000; 4867 break; 4868 default: 4869 if (netif_carrier_ok(netdev)) 4870 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4871 adapter->speed = SPEED_UNKNOWN; 4872 } 4873 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4874 adapter->duplex = DUPLEX_FULL; 4875 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4876 adapter->duplex = DUPLEX_HALF; 4877 else 4878 adapter->duplex = DUPLEX_UNKNOWN; 4879 4880 return rc; 4881 } 4882 4883 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4884 struct ibmvnic_adapter *adapter) 4885 { 4886 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4887 struct net_device *netdev = adapter->netdev; 4888 struct device *dev = &adapter->vdev->dev; 4889 u64 *u64_crq = (u64 *)crq; 4890 long rc; 4891 4892 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4893 (unsigned long)cpu_to_be64(u64_crq[0]), 4894 (unsigned long)cpu_to_be64(u64_crq[1])); 4895 switch (gen_crq->first) { 4896 case IBMVNIC_CRQ_INIT_RSP: 4897 switch (gen_crq->cmd) { 4898 case IBMVNIC_CRQ_INIT: 4899 dev_info(dev, "Partner initialized\n"); 4900 adapter->from_passive_init = true; 4901 /* Discard any stale login responses from prev reset. 4902 * CHECK: should we clear even on INIT_COMPLETE? 4903 */ 4904 adapter->login_pending = false; 4905 4906 if (!completion_done(&adapter->init_done)) { 4907 complete(&adapter->init_done); 4908 adapter->init_done_rc = -EIO; 4909 } 4910 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4911 if (rc && rc != -EBUSY) { 4912 /* We were unable to schedule the failover 4913 * reset either because the adapter was still 4914 * probing (eg: during kexec) or we could not 4915 * allocate memory. Clear the failover_pending 4916 * flag since no one else will. We ignore 4917 * EBUSY because it means either FAILOVER reset 4918 * is already scheduled or the adapter is 4919 * being removed. 4920 */ 4921 netdev_err(netdev, 4922 "Error %ld scheduling failover reset\n", 4923 rc); 4924 adapter->failover_pending = false; 4925 } 4926 break; 4927 case IBMVNIC_CRQ_INIT_COMPLETE: 4928 dev_info(dev, "Partner initialization complete\n"); 4929 adapter->crq.active = true; 4930 send_version_xchg(adapter); 4931 break; 4932 default: 4933 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4934 } 4935 return; 4936 case IBMVNIC_CRQ_XPORT_EVENT: 4937 netif_carrier_off(netdev); 4938 adapter->crq.active = false; 4939 /* terminate any thread waiting for a response 4940 * from the device 4941 */ 4942 if (!completion_done(&adapter->fw_done)) { 4943 adapter->fw_done_rc = -EIO; 4944 complete(&adapter->fw_done); 4945 } 4946 if (!completion_done(&adapter->stats_done)) 4947 complete(&adapter->stats_done); 4948 if (test_bit(0, &adapter->resetting)) 4949 adapter->force_reset_recovery = true; 4950 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4951 dev_info(dev, "Migrated, re-enabling adapter\n"); 4952 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4953 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4954 dev_info(dev, "Backing device failover detected\n"); 4955 adapter->failover_pending = true; 4956 } else { 4957 /* The adapter lost the connection */ 4958 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4959 gen_crq->cmd); 4960 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4961 } 4962 return; 4963 case IBMVNIC_CRQ_CMD_RSP: 4964 break; 4965 default: 4966 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4967 gen_crq->first); 4968 return; 4969 } 4970 4971 switch (gen_crq->cmd) { 4972 case VERSION_EXCHANGE_RSP: 4973 rc = crq->version_exchange_rsp.rc.code; 4974 if (rc) { 4975 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4976 break; 4977 } 4978 ibmvnic_version = 4979 be16_to_cpu(crq->version_exchange_rsp.version); 4980 dev_info(dev, "Partner protocol version is %d\n", 4981 ibmvnic_version); 4982 send_query_cap(adapter); 4983 break; 4984 case QUERY_CAPABILITY_RSP: 4985 handle_query_cap_rsp(crq, adapter); 4986 break; 4987 case QUERY_MAP_RSP: 4988 handle_query_map_rsp(crq, adapter); 4989 break; 4990 case REQUEST_MAP_RSP: 4991 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4992 complete(&adapter->fw_done); 4993 break; 4994 case REQUEST_UNMAP_RSP: 4995 handle_request_unmap_rsp(crq, adapter); 4996 break; 4997 case REQUEST_CAPABILITY_RSP: 4998 handle_request_cap_rsp(crq, adapter); 4999 break; 5000 case LOGIN_RSP: 5001 netdev_dbg(netdev, "Got Login Response\n"); 5002 handle_login_rsp(crq, adapter); 5003 break; 5004 case LOGICAL_LINK_STATE_RSP: 5005 netdev_dbg(netdev, 5006 "Got Logical Link State Response, state: %d rc: %d\n", 5007 crq->logical_link_state_rsp.link_state, 5008 crq->logical_link_state_rsp.rc.code); 5009 adapter->logical_link_state = 5010 crq->logical_link_state_rsp.link_state; 5011 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 5012 complete(&adapter->init_done); 5013 break; 5014 case LINK_STATE_INDICATION: 5015 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 5016 adapter->phys_link_state = 5017 crq->link_state_indication.phys_link_state; 5018 adapter->logical_link_state = 5019 crq->link_state_indication.logical_link_state; 5020 if (adapter->phys_link_state && adapter->logical_link_state) 5021 netif_carrier_on(netdev); 5022 else 5023 netif_carrier_off(netdev); 5024 break; 5025 case CHANGE_MAC_ADDR_RSP: 5026 netdev_dbg(netdev, "Got MAC address change Response\n"); 5027 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 5028 break; 5029 case ERROR_INDICATION: 5030 netdev_dbg(netdev, "Got Error Indication\n"); 5031 handle_error_indication(crq, adapter); 5032 break; 5033 case REQUEST_STATISTICS_RSP: 5034 netdev_dbg(netdev, "Got Statistics Response\n"); 5035 complete(&adapter->stats_done); 5036 break; 5037 case QUERY_IP_OFFLOAD_RSP: 5038 netdev_dbg(netdev, "Got Query IP offload Response\n"); 5039 handle_query_ip_offload_rsp(adapter); 5040 break; 5041 case MULTICAST_CTRL_RSP: 5042 netdev_dbg(netdev, "Got multicast control Response\n"); 5043 break; 5044 case CONTROL_IP_OFFLOAD_RSP: 5045 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5046 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5047 sizeof(adapter->ip_offload_ctrl), 5048 DMA_TO_DEVICE); 5049 complete(&adapter->init_done); 5050 break; 5051 case COLLECT_FW_TRACE_RSP: 5052 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5053 complete(&adapter->fw_done); 5054 break; 5055 case GET_VPD_SIZE_RSP: 5056 handle_vpd_size_rsp(crq, adapter); 5057 break; 5058 case GET_VPD_RSP: 5059 handle_vpd_rsp(crq, adapter); 5060 break; 5061 case QUERY_PHYS_PARMS_RSP: 5062 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5063 complete(&adapter->fw_done); 5064 break; 5065 default: 5066 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5067 gen_crq->cmd); 5068 } 5069 } 5070 5071 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5072 { 5073 struct ibmvnic_adapter *adapter = instance; 5074 5075 tasklet_schedule(&adapter->tasklet); 5076 return IRQ_HANDLED; 5077 } 5078 5079 static void ibmvnic_tasklet(struct tasklet_struct *t) 5080 { 5081 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5082 struct ibmvnic_crq_queue *queue = &adapter->crq; 5083 union ibmvnic_crq *crq; 5084 unsigned long flags; 5085 bool done = false; 5086 5087 spin_lock_irqsave(&queue->lock, flags); 5088 while (!done) { 5089 /* Pull all the valid messages off the CRQ */ 5090 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5091 /* This barrier makes sure ibmvnic_next_crq()'s 5092 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5093 * before ibmvnic_handle_crq()'s 5094 * switch(gen_crq->first) and switch(gen_crq->cmd). 5095 */ 5096 dma_rmb(); 5097 ibmvnic_handle_crq(crq, adapter); 5098 crq->generic.first = 0; 5099 } 5100 5101 /* remain in tasklet until all 5102 * capabilities responses are received 5103 */ 5104 if (!adapter->wait_capability) 5105 done = true; 5106 } 5107 /* if capabilities CRQ's were sent in this tasklet, the following 5108 * tasklet must wait until all responses are received 5109 */ 5110 if (atomic_read(&adapter->running_cap_crqs) != 0) 5111 adapter->wait_capability = true; 5112 spin_unlock_irqrestore(&queue->lock, flags); 5113 } 5114 5115 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5116 { 5117 struct vio_dev *vdev = adapter->vdev; 5118 int rc; 5119 5120 do { 5121 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5122 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5123 5124 if (rc) 5125 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5126 5127 return rc; 5128 } 5129 5130 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5131 { 5132 struct ibmvnic_crq_queue *crq = &adapter->crq; 5133 struct device *dev = &adapter->vdev->dev; 5134 struct vio_dev *vdev = adapter->vdev; 5135 int rc; 5136 5137 /* Close the CRQ */ 5138 do { 5139 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5140 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5141 5142 /* Clean out the queue */ 5143 if (!crq->msgs) 5144 return -EINVAL; 5145 5146 memset(crq->msgs, 0, PAGE_SIZE); 5147 crq->cur = 0; 5148 crq->active = false; 5149 5150 /* And re-open it again */ 5151 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5152 crq->msg_token, PAGE_SIZE); 5153 5154 if (rc == H_CLOSED) 5155 /* Adapter is good, but other end is not ready */ 5156 dev_warn(dev, "Partner adapter not ready\n"); 5157 else if (rc != 0) 5158 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5159 5160 return rc; 5161 } 5162 5163 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5164 { 5165 struct ibmvnic_crq_queue *crq = &adapter->crq; 5166 struct vio_dev *vdev = adapter->vdev; 5167 long rc; 5168 5169 if (!crq->msgs) 5170 return; 5171 5172 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5173 free_irq(vdev->irq, adapter); 5174 tasklet_kill(&adapter->tasklet); 5175 do { 5176 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5177 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5178 5179 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5180 DMA_BIDIRECTIONAL); 5181 free_page((unsigned long)crq->msgs); 5182 crq->msgs = NULL; 5183 crq->active = false; 5184 } 5185 5186 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5187 { 5188 struct ibmvnic_crq_queue *crq = &adapter->crq; 5189 struct device *dev = &adapter->vdev->dev; 5190 struct vio_dev *vdev = adapter->vdev; 5191 int rc, retrc = -ENOMEM; 5192 5193 if (crq->msgs) 5194 return 0; 5195 5196 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5197 /* Should we allocate more than one page? */ 5198 5199 if (!crq->msgs) 5200 return -ENOMEM; 5201 5202 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5203 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5204 DMA_BIDIRECTIONAL); 5205 if (dma_mapping_error(dev, crq->msg_token)) 5206 goto map_failed; 5207 5208 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5209 crq->msg_token, PAGE_SIZE); 5210 5211 if (rc == H_RESOURCE) 5212 /* maybe kexecing and resource is busy. try a reset */ 5213 rc = ibmvnic_reset_crq(adapter); 5214 retrc = rc; 5215 5216 if (rc == H_CLOSED) { 5217 dev_warn(dev, "Partner adapter not ready\n"); 5218 } else if (rc) { 5219 dev_warn(dev, "Error %d opening adapter\n", rc); 5220 goto reg_crq_failed; 5221 } 5222 5223 retrc = 0; 5224 5225 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5226 5227 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5228 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5229 adapter->vdev->unit_address); 5230 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5231 if (rc) { 5232 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5233 vdev->irq, rc); 5234 goto req_irq_failed; 5235 } 5236 5237 rc = vio_enable_interrupts(vdev); 5238 if (rc) { 5239 dev_err(dev, "Error %d enabling interrupts\n", rc); 5240 goto req_irq_failed; 5241 } 5242 5243 crq->cur = 0; 5244 spin_lock_init(&crq->lock); 5245 5246 return retrc; 5247 5248 req_irq_failed: 5249 tasklet_kill(&adapter->tasklet); 5250 do { 5251 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5252 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5253 reg_crq_failed: 5254 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5255 map_failed: 5256 free_page((unsigned long)crq->msgs); 5257 crq->msgs = NULL; 5258 return retrc; 5259 } 5260 5261 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5262 { 5263 struct device *dev = &adapter->vdev->dev; 5264 unsigned long timeout = msecs_to_jiffies(20000); 5265 u64 old_num_rx_queues = adapter->req_rx_queues; 5266 u64 old_num_tx_queues = adapter->req_tx_queues; 5267 int rc; 5268 5269 adapter->from_passive_init = false; 5270 5271 if (reset) 5272 reinit_completion(&adapter->init_done); 5273 5274 adapter->init_done_rc = 0; 5275 rc = ibmvnic_send_crq_init(adapter); 5276 if (rc) { 5277 dev_err(dev, "Send crq init failed with error %d\n", rc); 5278 return rc; 5279 } 5280 5281 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5282 dev_err(dev, "Initialization sequence timed out\n"); 5283 return -1; 5284 } 5285 5286 if (adapter->init_done_rc) { 5287 release_crq_queue(adapter); 5288 return adapter->init_done_rc; 5289 } 5290 5291 if (adapter->from_passive_init) { 5292 adapter->state = VNIC_OPEN; 5293 adapter->from_passive_init = false; 5294 return -1; 5295 } 5296 5297 if (reset && 5298 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5299 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5300 if (adapter->req_rx_queues != old_num_rx_queues || 5301 adapter->req_tx_queues != old_num_tx_queues) { 5302 release_sub_crqs(adapter, 0); 5303 rc = init_sub_crqs(adapter); 5304 } else { 5305 rc = reset_sub_crq_queues(adapter); 5306 } 5307 } else { 5308 rc = init_sub_crqs(adapter); 5309 } 5310 5311 if (rc) { 5312 dev_err(dev, "Initialization of sub crqs failed\n"); 5313 release_crq_queue(adapter); 5314 return rc; 5315 } 5316 5317 rc = init_sub_crq_irqs(adapter); 5318 if (rc) { 5319 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5320 release_crq_queue(adapter); 5321 } 5322 5323 return rc; 5324 } 5325 5326 static struct device_attribute dev_attr_failover; 5327 5328 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5329 { 5330 struct ibmvnic_adapter *adapter; 5331 struct net_device *netdev; 5332 unsigned char *mac_addr_p; 5333 int rc; 5334 5335 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5336 dev->unit_address); 5337 5338 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5339 VETH_MAC_ADDR, NULL); 5340 if (!mac_addr_p) { 5341 dev_err(&dev->dev, 5342 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5343 __FILE__, __LINE__); 5344 return 0; 5345 } 5346 5347 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5348 IBMVNIC_MAX_QUEUES); 5349 if (!netdev) 5350 return -ENOMEM; 5351 5352 adapter = netdev_priv(netdev); 5353 adapter->state = VNIC_PROBING; 5354 dev_set_drvdata(&dev->dev, netdev); 5355 adapter->vdev = dev; 5356 adapter->netdev = netdev; 5357 adapter->login_pending = false; 5358 5359 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5360 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5361 netdev->irq = dev->irq; 5362 netdev->netdev_ops = &ibmvnic_netdev_ops; 5363 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5364 SET_NETDEV_DEV(netdev, &dev->dev); 5365 5366 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5367 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5368 __ibmvnic_delayed_reset); 5369 INIT_LIST_HEAD(&adapter->rwi_list); 5370 spin_lock_init(&adapter->rwi_lock); 5371 spin_lock_init(&adapter->state_lock); 5372 mutex_init(&adapter->fw_lock); 5373 init_completion(&adapter->init_done); 5374 init_completion(&adapter->fw_done); 5375 init_completion(&adapter->reset_done); 5376 init_completion(&adapter->stats_done); 5377 clear_bit(0, &adapter->resetting); 5378 5379 do { 5380 rc = init_crq_queue(adapter); 5381 if (rc) { 5382 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5383 rc); 5384 goto ibmvnic_init_fail; 5385 } 5386 5387 rc = ibmvnic_reset_init(adapter, false); 5388 if (rc && rc != EAGAIN) 5389 goto ibmvnic_init_fail; 5390 } while (rc == EAGAIN); 5391 5392 rc = init_stats_buffers(adapter); 5393 if (rc) 5394 goto ibmvnic_init_fail; 5395 5396 rc = init_stats_token(adapter); 5397 if (rc) 5398 goto ibmvnic_stats_fail; 5399 5400 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5401 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5402 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5403 5404 rc = device_create_file(&dev->dev, &dev_attr_failover); 5405 if (rc) 5406 goto ibmvnic_dev_file_err; 5407 5408 netif_carrier_off(netdev); 5409 rc = register_netdev(netdev); 5410 if (rc) { 5411 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5412 goto ibmvnic_register_fail; 5413 } 5414 dev_info(&dev->dev, "ibmvnic registered\n"); 5415 5416 adapter->state = VNIC_PROBED; 5417 5418 adapter->wait_for_reset = false; 5419 adapter->last_reset_time = jiffies; 5420 return 0; 5421 5422 ibmvnic_register_fail: 5423 device_remove_file(&dev->dev, &dev_attr_failover); 5424 5425 ibmvnic_dev_file_err: 5426 release_stats_token(adapter); 5427 5428 ibmvnic_stats_fail: 5429 release_stats_buffers(adapter); 5430 5431 ibmvnic_init_fail: 5432 release_sub_crqs(adapter, 1); 5433 release_crq_queue(adapter); 5434 mutex_destroy(&adapter->fw_lock); 5435 free_netdev(netdev); 5436 5437 return rc; 5438 } 5439 5440 static void ibmvnic_remove(struct vio_dev *dev) 5441 { 5442 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5443 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5444 unsigned long flags; 5445 5446 spin_lock_irqsave(&adapter->state_lock, flags); 5447 5448 /* If ibmvnic_reset() is scheduling a reset, wait for it to 5449 * finish. Then, set the state to REMOVING to prevent it from 5450 * scheduling any more work and to have reset functions ignore 5451 * any resets that have already been scheduled. Drop the lock 5452 * after setting state, so __ibmvnic_reset() which is called 5453 * from the flush_work() below, can make progress. 5454 */ 5455 spin_lock(&adapter->rwi_lock); 5456 adapter->state = VNIC_REMOVING; 5457 spin_unlock(&adapter->rwi_lock); 5458 5459 spin_unlock_irqrestore(&adapter->state_lock, flags); 5460 5461 flush_work(&adapter->ibmvnic_reset); 5462 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5463 5464 rtnl_lock(); 5465 unregister_netdevice(netdev); 5466 5467 release_resources(adapter); 5468 release_sub_crqs(adapter, 1); 5469 release_crq_queue(adapter); 5470 5471 release_stats_token(adapter); 5472 release_stats_buffers(adapter); 5473 5474 adapter->state = VNIC_REMOVED; 5475 5476 rtnl_unlock(); 5477 mutex_destroy(&adapter->fw_lock); 5478 device_remove_file(&dev->dev, &dev_attr_failover); 5479 free_netdev(netdev); 5480 dev_set_drvdata(&dev->dev, NULL); 5481 } 5482 5483 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5484 const char *buf, size_t count) 5485 { 5486 struct net_device *netdev = dev_get_drvdata(dev); 5487 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5488 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5489 __be64 session_token; 5490 long rc; 5491 5492 if (!sysfs_streq(buf, "1")) 5493 return -EINVAL; 5494 5495 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5496 H_GET_SESSION_TOKEN, 0, 0, 0); 5497 if (rc) { 5498 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5499 rc); 5500 goto last_resort; 5501 } 5502 5503 session_token = (__be64)retbuf[0]; 5504 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5505 be64_to_cpu(session_token)); 5506 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5507 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5508 if (rc) 5509 netdev_err(netdev, 5510 "H_VIOCTL initiated failover failed, rc %ld\n", 5511 rc); 5512 5513 last_resort: 5514 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 5515 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5516 5517 return count; 5518 } 5519 static DEVICE_ATTR_WO(failover); 5520 5521 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5522 { 5523 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5524 struct ibmvnic_adapter *adapter; 5525 struct iommu_table *tbl; 5526 unsigned long ret = 0; 5527 int i; 5528 5529 tbl = get_iommu_table_base(&vdev->dev); 5530 5531 /* netdev inits at probe time along with the structures we need below*/ 5532 if (!netdev) 5533 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5534 5535 adapter = netdev_priv(netdev); 5536 5537 ret += PAGE_SIZE; /* the crq message queue */ 5538 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5539 5540 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5541 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5542 5543 for (i = 0; i < adapter->num_active_rx_pools; i++) 5544 ret += adapter->rx_pool[i].size * 5545 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5546 5547 return ret; 5548 } 5549 5550 static int ibmvnic_resume(struct device *dev) 5551 { 5552 struct net_device *netdev = dev_get_drvdata(dev); 5553 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5554 5555 if (adapter->state != VNIC_OPEN) 5556 return 0; 5557 5558 tasklet_schedule(&adapter->tasklet); 5559 5560 return 0; 5561 } 5562 5563 static const struct vio_device_id ibmvnic_device_table[] = { 5564 {"network", "IBM,vnic"}, 5565 {"", "" } 5566 }; 5567 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5568 5569 static const struct dev_pm_ops ibmvnic_pm_ops = { 5570 .resume = ibmvnic_resume 5571 }; 5572 5573 static struct vio_driver ibmvnic_driver = { 5574 .id_table = ibmvnic_device_table, 5575 .probe = ibmvnic_probe, 5576 .remove = ibmvnic_remove, 5577 .get_desired_dma = ibmvnic_get_desired_dma, 5578 .name = ibmvnic_driver_name, 5579 .pm = &ibmvnic_pm_ops, 5580 }; 5581 5582 /* module functions */ 5583 static int __init ibmvnic_module_init(void) 5584 { 5585 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5586 IBMVNIC_DRIVER_VERSION); 5587 5588 return vio_register_driver(&ibmvnic_driver); 5589 } 5590 5591 static void __exit ibmvnic_module_exit(void) 5592 { 5593 vio_unregister_driver(&ibmvnic_driver); 5594 } 5595 5596 module_init(ibmvnic_module_init); 5597 module_exit(ibmvnic_module_exit); 5598