1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/kthread.h> 57 #include <linux/seq_file.h> 58 #include <linux/interrupt.h> 59 #include <net/net_namespace.h> 60 #include <asm/hvcall.h> 61 #include <linux/atomic.h> 62 #include <asm/vio.h> 63 #include <asm/iommu.h> 64 #include <linux/uaccess.h> 65 #include <asm/firmware.h> 66 #include <linux/workqueue.h> 67 #include <linux/if_vlan.h> 68 #include <linux/utsname.h> 69 70 #include "ibmvnic.h" 71 72 static const char ibmvnic_driver_name[] = "ibmvnic"; 73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 74 75 MODULE_AUTHOR("Santiago Leon"); 76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 77 MODULE_LICENSE("GPL"); 78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 79 80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 81 static int ibmvnic_remove(struct vio_dev *); 82 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 87 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 88 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 89 static int enable_scrq_irq(struct ibmvnic_adapter *, 90 struct ibmvnic_sub_crq_queue *); 91 static int disable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int pending_scrq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static int ibmvnic_poll(struct napi_struct *napi, int data); 98 static void send_query_map(struct ibmvnic_adapter *adapter); 99 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 100 static int send_request_unmap(struct ibmvnic_adapter *, u8); 101 static int send_login(struct ibmvnic_adapter *adapter); 102 static void send_query_cap(struct ibmvnic_adapter *adapter); 103 static int init_sub_crqs(struct ibmvnic_adapter *); 104 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 105 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 106 static void release_crq_queue(struct ibmvnic_adapter *); 107 static int __ibmvnic_set_mac(struct net_device *, u8 *); 108 static int init_crq_queue(struct ibmvnic_adapter *adapter); 109 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 110 111 struct ibmvnic_stat { 112 char name[ETH_GSTRING_LEN]; 113 int offset; 114 }; 115 116 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 117 offsetof(struct ibmvnic_statistics, stat)) 118 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 119 120 static const struct ibmvnic_stat ibmvnic_stats[] = { 121 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 122 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 123 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 124 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 125 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 126 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 127 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 128 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 129 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 130 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 131 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 132 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 133 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 134 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 135 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 136 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 137 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 138 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 139 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 140 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 141 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 142 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 143 }; 144 145 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 146 unsigned long length, unsigned long *number, 147 unsigned long *irq) 148 { 149 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 150 long rc; 151 152 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 153 *number = retbuf[0]; 154 *irq = retbuf[1]; 155 156 return rc; 157 } 158 159 /** 160 * ibmvnic_wait_for_completion - Check device state and wait for completion 161 * @adapter: private device data 162 * @comp_done: completion structure to wait for 163 * @timeout: time to wait in milliseconds 164 * 165 * Wait for a completion signal or until the timeout limit is reached 166 * while checking that the device is still active. 167 */ 168 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 169 struct completion *comp_done, 170 unsigned long timeout) 171 { 172 struct net_device *netdev; 173 unsigned long div_timeout; 174 u8 retry; 175 176 netdev = adapter->netdev; 177 retry = 5; 178 div_timeout = msecs_to_jiffies(timeout / retry); 179 while (true) { 180 if (!adapter->crq.active) { 181 netdev_err(netdev, "Device down!\n"); 182 return -ENODEV; 183 } 184 if (!retry--) 185 break; 186 if (wait_for_completion_timeout(comp_done, div_timeout)) 187 return 0; 188 } 189 netdev_err(netdev, "Operation timed out.\n"); 190 return -ETIMEDOUT; 191 } 192 193 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 194 struct ibmvnic_long_term_buff *ltb, int size) 195 { 196 struct device *dev = &adapter->vdev->dev; 197 int rc; 198 199 ltb->size = size; 200 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 201 GFP_KERNEL); 202 203 if (!ltb->buff) { 204 dev_err(dev, "Couldn't alloc long term buffer\n"); 205 return -ENOMEM; 206 } 207 ltb->map_id = adapter->map_id; 208 adapter->map_id++; 209 210 mutex_lock(&adapter->fw_lock); 211 adapter->fw_done_rc = 0; 212 reinit_completion(&adapter->fw_done); 213 rc = send_request_map(adapter, ltb->addr, 214 ltb->size, ltb->map_id); 215 if (rc) { 216 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 217 mutex_unlock(&adapter->fw_lock); 218 return rc; 219 } 220 221 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 222 if (rc) { 223 dev_err(dev, 224 "Long term map request aborted or timed out,rc = %d\n", 225 rc); 226 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 227 mutex_unlock(&adapter->fw_lock); 228 return rc; 229 } 230 231 if (adapter->fw_done_rc) { 232 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 233 adapter->fw_done_rc); 234 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 235 mutex_unlock(&adapter->fw_lock); 236 return -1; 237 } 238 mutex_unlock(&adapter->fw_lock); 239 return 0; 240 } 241 242 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 243 struct ibmvnic_long_term_buff *ltb) 244 { 245 struct device *dev = &adapter->vdev->dev; 246 247 if (!ltb->buff) 248 return; 249 250 /* VIOS automatically unmaps the long term buffer at remote 251 * end for the following resets: 252 * FAILOVER, MOBILITY, TIMEOUT. 253 */ 254 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 255 adapter->reset_reason != VNIC_RESET_MOBILITY && 256 adapter->reset_reason != VNIC_RESET_TIMEOUT) 257 send_request_unmap(adapter, ltb->map_id); 258 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 259 } 260 261 static int reset_long_term_buff(struct ibmvnic_long_term_buff *ltb) 262 { 263 if (!ltb->buff) 264 return -EINVAL; 265 266 memset(ltb->buff, 0, ltb->size); 267 return 0; 268 } 269 270 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 271 { 272 int i; 273 274 for (i = 0; i < adapter->num_active_rx_pools; i++) 275 adapter->rx_pool[i].active = 0; 276 } 277 278 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 279 struct ibmvnic_rx_pool *pool) 280 { 281 int count = pool->size - atomic_read(&pool->available); 282 u64 handle = adapter->rx_scrq[pool->index]->handle; 283 struct device *dev = &adapter->vdev->dev; 284 struct ibmvnic_ind_xmit_queue *ind_bufp; 285 struct ibmvnic_sub_crq_queue *rx_scrq; 286 union sub_crq *sub_crq; 287 int buffers_added = 0; 288 unsigned long lpar_rc; 289 struct sk_buff *skb; 290 unsigned int offset; 291 dma_addr_t dma_addr; 292 unsigned char *dst; 293 int shift = 0; 294 int index; 295 int i; 296 297 if (!pool->active) 298 return; 299 300 rx_scrq = adapter->rx_scrq[pool->index]; 301 ind_bufp = &rx_scrq->ind_buf; 302 for (i = 0; i < count; ++i) { 303 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); 304 if (!skb) { 305 dev_err(dev, "Couldn't replenish rx buff\n"); 306 adapter->replenish_no_mem++; 307 break; 308 } 309 310 index = pool->free_map[pool->next_free]; 311 312 if (pool->rx_buff[index].skb) 313 dev_err(dev, "Inconsistent free_map!\n"); 314 315 /* Copy the skb to the long term mapped DMA buffer */ 316 offset = index * pool->buff_size; 317 dst = pool->long_term_buff.buff + offset; 318 memset(dst, 0, pool->buff_size); 319 dma_addr = pool->long_term_buff.addr + offset; 320 pool->rx_buff[index].data = dst; 321 322 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 323 pool->rx_buff[index].dma = dma_addr; 324 pool->rx_buff[index].skb = skb; 325 pool->rx_buff[index].pool_index = pool->index; 326 pool->rx_buff[index].size = pool->buff_size; 327 328 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 329 memset(sub_crq, 0, sizeof(*sub_crq)); 330 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 331 sub_crq->rx_add.correlator = 332 cpu_to_be64((u64)&pool->rx_buff[index]); 333 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 334 sub_crq->rx_add.map_id = pool->long_term_buff.map_id; 335 336 /* The length field of the sCRQ is defined to be 24 bits so the 337 * buffer size needs to be left shifted by a byte before it is 338 * converted to big endian to prevent the last byte from being 339 * truncated. 340 */ 341 #ifdef __LITTLE_ENDIAN__ 342 shift = 8; 343 #endif 344 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 345 pool->next_free = (pool->next_free + 1) % pool->size; 346 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 347 i == count - 1) { 348 lpar_rc = 349 send_subcrq_indirect(adapter, handle, 350 (u64)ind_bufp->indir_dma, 351 (u64)ind_bufp->index); 352 if (lpar_rc != H_SUCCESS) 353 goto failure; 354 buffers_added += ind_bufp->index; 355 adapter->replenish_add_buff_success += ind_bufp->index; 356 ind_bufp->index = 0; 357 } 358 } 359 atomic_add(buffers_added, &pool->available); 360 return; 361 362 failure: 363 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 364 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 365 for (i = ind_bufp->index - 1; i >= 0; --i) { 366 struct ibmvnic_rx_buff *rx_buff; 367 368 pool->next_free = pool->next_free == 0 ? 369 pool->size - 1 : pool->next_free - 1; 370 sub_crq = &ind_bufp->indir_arr[i]; 371 rx_buff = (struct ibmvnic_rx_buff *) 372 be64_to_cpu(sub_crq->rx_add.correlator); 373 index = (int)(rx_buff - pool->rx_buff); 374 pool->free_map[pool->next_free] = index; 375 dev_kfree_skb_any(pool->rx_buff[index].skb); 376 pool->rx_buff[index].skb = NULL; 377 } 378 adapter->replenish_add_buff_failure += ind_bufp->index; 379 atomic_add(buffers_added, &pool->available); 380 ind_bufp->index = 0; 381 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 382 /* Disable buffer pool replenishment and report carrier off if 383 * queue is closed or pending failover. 384 * Firmware guarantees that a signal will be sent to the 385 * driver, triggering a reset. 386 */ 387 deactivate_rx_pools(adapter); 388 netif_carrier_off(adapter->netdev); 389 } 390 } 391 392 static void replenish_pools(struct ibmvnic_adapter *adapter) 393 { 394 int i; 395 396 adapter->replenish_task_cycles++; 397 for (i = 0; i < adapter->num_active_rx_pools; i++) { 398 if (adapter->rx_pool[i].active) 399 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 400 } 401 402 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 403 } 404 405 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 406 { 407 kfree(adapter->tx_stats_buffers); 408 kfree(adapter->rx_stats_buffers); 409 adapter->tx_stats_buffers = NULL; 410 adapter->rx_stats_buffers = NULL; 411 } 412 413 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 414 { 415 adapter->tx_stats_buffers = 416 kcalloc(IBMVNIC_MAX_QUEUES, 417 sizeof(struct ibmvnic_tx_queue_stats), 418 GFP_KERNEL); 419 if (!adapter->tx_stats_buffers) 420 return -ENOMEM; 421 422 adapter->rx_stats_buffers = 423 kcalloc(IBMVNIC_MAX_QUEUES, 424 sizeof(struct ibmvnic_rx_queue_stats), 425 GFP_KERNEL); 426 if (!adapter->rx_stats_buffers) 427 return -ENOMEM; 428 429 return 0; 430 } 431 432 static void release_stats_token(struct ibmvnic_adapter *adapter) 433 { 434 struct device *dev = &adapter->vdev->dev; 435 436 if (!adapter->stats_token) 437 return; 438 439 dma_unmap_single(dev, adapter->stats_token, 440 sizeof(struct ibmvnic_statistics), 441 DMA_FROM_DEVICE); 442 adapter->stats_token = 0; 443 } 444 445 static int init_stats_token(struct ibmvnic_adapter *adapter) 446 { 447 struct device *dev = &adapter->vdev->dev; 448 dma_addr_t stok; 449 450 stok = dma_map_single(dev, &adapter->stats, 451 sizeof(struct ibmvnic_statistics), 452 DMA_FROM_DEVICE); 453 if (dma_mapping_error(dev, stok)) { 454 dev_err(dev, "Couldn't map stats buffer\n"); 455 return -1; 456 } 457 458 adapter->stats_token = stok; 459 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 460 return 0; 461 } 462 463 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 464 { 465 struct ibmvnic_rx_pool *rx_pool; 466 u64 buff_size; 467 int rx_scrqs; 468 int i, j, rc; 469 470 if (!adapter->rx_pool) 471 return -1; 472 473 buff_size = adapter->cur_rx_buf_sz; 474 rx_scrqs = adapter->num_active_rx_pools; 475 for (i = 0; i < rx_scrqs; i++) { 476 rx_pool = &adapter->rx_pool[i]; 477 478 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 479 480 if (rx_pool->buff_size != buff_size) { 481 free_long_term_buff(adapter, &rx_pool->long_term_buff); 482 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 483 rc = alloc_long_term_buff(adapter, 484 &rx_pool->long_term_buff, 485 rx_pool->size * 486 rx_pool->buff_size); 487 } else { 488 rc = reset_long_term_buff(&rx_pool->long_term_buff); 489 } 490 491 if (rc) 492 return rc; 493 494 for (j = 0; j < rx_pool->size; j++) 495 rx_pool->free_map[j] = j; 496 497 memset(rx_pool->rx_buff, 0, 498 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 499 500 atomic_set(&rx_pool->available, 0); 501 rx_pool->next_alloc = 0; 502 rx_pool->next_free = 0; 503 rx_pool->active = 1; 504 } 505 506 return 0; 507 } 508 509 static void release_rx_pools(struct ibmvnic_adapter *adapter) 510 { 511 struct ibmvnic_rx_pool *rx_pool; 512 int i, j; 513 514 if (!adapter->rx_pool) 515 return; 516 517 for (i = 0; i < adapter->num_active_rx_pools; i++) { 518 rx_pool = &adapter->rx_pool[i]; 519 520 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 521 522 kfree(rx_pool->free_map); 523 free_long_term_buff(adapter, &rx_pool->long_term_buff); 524 525 if (!rx_pool->rx_buff) 526 continue; 527 528 for (j = 0; j < rx_pool->size; j++) { 529 if (rx_pool->rx_buff[j].skb) { 530 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 531 rx_pool->rx_buff[j].skb = NULL; 532 } 533 } 534 535 kfree(rx_pool->rx_buff); 536 } 537 538 kfree(adapter->rx_pool); 539 adapter->rx_pool = NULL; 540 adapter->num_active_rx_pools = 0; 541 } 542 543 static int init_rx_pools(struct net_device *netdev) 544 { 545 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 546 struct device *dev = &adapter->vdev->dev; 547 struct ibmvnic_rx_pool *rx_pool; 548 int rxadd_subcrqs; 549 u64 buff_size; 550 int i, j; 551 552 rxadd_subcrqs = adapter->num_active_rx_scrqs; 553 buff_size = adapter->cur_rx_buf_sz; 554 555 adapter->rx_pool = kcalloc(rxadd_subcrqs, 556 sizeof(struct ibmvnic_rx_pool), 557 GFP_KERNEL); 558 if (!adapter->rx_pool) { 559 dev_err(dev, "Failed to allocate rx pools\n"); 560 return -1; 561 } 562 563 adapter->num_active_rx_pools = rxadd_subcrqs; 564 565 for (i = 0; i < rxadd_subcrqs; i++) { 566 rx_pool = &adapter->rx_pool[i]; 567 568 netdev_dbg(adapter->netdev, 569 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 570 i, adapter->req_rx_add_entries_per_subcrq, 571 buff_size); 572 573 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 574 rx_pool->index = i; 575 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 576 rx_pool->active = 1; 577 578 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 579 GFP_KERNEL); 580 if (!rx_pool->free_map) { 581 release_rx_pools(adapter); 582 return -1; 583 } 584 585 rx_pool->rx_buff = kcalloc(rx_pool->size, 586 sizeof(struct ibmvnic_rx_buff), 587 GFP_KERNEL); 588 if (!rx_pool->rx_buff) { 589 dev_err(dev, "Couldn't alloc rx buffers\n"); 590 release_rx_pools(adapter); 591 return -1; 592 } 593 594 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 595 rx_pool->size * rx_pool->buff_size)) { 596 release_rx_pools(adapter); 597 return -1; 598 } 599 600 for (j = 0; j < rx_pool->size; ++j) 601 rx_pool->free_map[j] = j; 602 603 atomic_set(&rx_pool->available, 0); 604 rx_pool->next_alloc = 0; 605 rx_pool->next_free = 0; 606 } 607 608 return 0; 609 } 610 611 static int reset_one_tx_pool(struct ibmvnic_tx_pool *tx_pool) 612 { 613 int rc, i; 614 615 rc = reset_long_term_buff(&tx_pool->long_term_buff); 616 if (rc) 617 return rc; 618 619 memset(tx_pool->tx_buff, 0, 620 tx_pool->num_buffers * 621 sizeof(struct ibmvnic_tx_buff)); 622 623 for (i = 0; i < tx_pool->num_buffers; i++) 624 tx_pool->free_map[i] = i; 625 626 tx_pool->consumer_index = 0; 627 tx_pool->producer_index = 0; 628 629 return 0; 630 } 631 632 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 633 { 634 int tx_scrqs; 635 int i, rc; 636 637 if (!adapter->tx_pool) 638 return -1; 639 640 tx_scrqs = adapter->num_active_tx_pools; 641 for (i = 0; i < tx_scrqs; i++) { 642 rc = reset_one_tx_pool(&adapter->tso_pool[i]); 643 if (rc) 644 return rc; 645 rc = reset_one_tx_pool(&adapter->tx_pool[i]); 646 if (rc) 647 return rc; 648 } 649 650 return 0; 651 } 652 653 static void release_vpd_data(struct ibmvnic_adapter *adapter) 654 { 655 if (!adapter->vpd) 656 return; 657 658 kfree(adapter->vpd->buff); 659 kfree(adapter->vpd); 660 661 adapter->vpd = NULL; 662 } 663 664 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 665 struct ibmvnic_tx_pool *tx_pool) 666 { 667 kfree(tx_pool->tx_buff); 668 kfree(tx_pool->free_map); 669 free_long_term_buff(adapter, &tx_pool->long_term_buff); 670 } 671 672 static void release_tx_pools(struct ibmvnic_adapter *adapter) 673 { 674 int i; 675 676 if (!adapter->tx_pool) 677 return; 678 679 for (i = 0; i < adapter->num_active_tx_pools; i++) { 680 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 681 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 682 } 683 684 kfree(adapter->tx_pool); 685 adapter->tx_pool = NULL; 686 kfree(adapter->tso_pool); 687 adapter->tso_pool = NULL; 688 adapter->num_active_tx_pools = 0; 689 } 690 691 static int init_one_tx_pool(struct net_device *netdev, 692 struct ibmvnic_tx_pool *tx_pool, 693 int num_entries, int buf_size) 694 { 695 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 696 int i; 697 698 tx_pool->tx_buff = kcalloc(num_entries, 699 sizeof(struct ibmvnic_tx_buff), 700 GFP_KERNEL); 701 if (!tx_pool->tx_buff) 702 return -1; 703 704 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 705 num_entries * buf_size)) 706 return -1; 707 708 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 709 if (!tx_pool->free_map) 710 return -1; 711 712 for (i = 0; i < num_entries; i++) 713 tx_pool->free_map[i] = i; 714 715 tx_pool->consumer_index = 0; 716 tx_pool->producer_index = 0; 717 tx_pool->num_buffers = num_entries; 718 tx_pool->buf_size = buf_size; 719 720 return 0; 721 } 722 723 static int init_tx_pools(struct net_device *netdev) 724 { 725 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 726 int tx_subcrqs; 727 u64 buff_size; 728 int i, rc; 729 730 tx_subcrqs = adapter->num_active_tx_scrqs; 731 adapter->tx_pool = kcalloc(tx_subcrqs, 732 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 733 if (!adapter->tx_pool) 734 return -1; 735 736 adapter->tso_pool = kcalloc(tx_subcrqs, 737 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 738 if (!adapter->tso_pool) 739 return -1; 740 741 adapter->num_active_tx_pools = tx_subcrqs; 742 743 for (i = 0; i < tx_subcrqs; i++) { 744 buff_size = adapter->req_mtu + VLAN_HLEN; 745 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 746 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 747 adapter->req_tx_entries_per_subcrq, 748 buff_size); 749 if (rc) { 750 release_tx_pools(adapter); 751 return rc; 752 } 753 754 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 755 IBMVNIC_TSO_BUFS, 756 IBMVNIC_TSO_BUF_SZ); 757 if (rc) { 758 release_tx_pools(adapter); 759 return rc; 760 } 761 } 762 763 return 0; 764 } 765 766 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 767 { 768 int i; 769 770 if (adapter->napi_enabled) 771 return; 772 773 for (i = 0; i < adapter->req_rx_queues; i++) 774 napi_enable(&adapter->napi[i]); 775 776 adapter->napi_enabled = true; 777 } 778 779 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 780 { 781 int i; 782 783 if (!adapter->napi_enabled) 784 return; 785 786 for (i = 0; i < adapter->req_rx_queues; i++) { 787 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 788 napi_disable(&adapter->napi[i]); 789 } 790 791 adapter->napi_enabled = false; 792 } 793 794 static int init_napi(struct ibmvnic_adapter *adapter) 795 { 796 int i; 797 798 adapter->napi = kcalloc(adapter->req_rx_queues, 799 sizeof(struct napi_struct), GFP_KERNEL); 800 if (!adapter->napi) 801 return -ENOMEM; 802 803 for (i = 0; i < adapter->req_rx_queues; i++) { 804 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 805 netif_napi_add(adapter->netdev, &adapter->napi[i], 806 ibmvnic_poll, NAPI_POLL_WEIGHT); 807 } 808 809 adapter->num_active_rx_napi = adapter->req_rx_queues; 810 return 0; 811 } 812 813 static void release_napi(struct ibmvnic_adapter *adapter) 814 { 815 int i; 816 817 if (!adapter->napi) 818 return; 819 820 for (i = 0; i < adapter->num_active_rx_napi; i++) { 821 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 822 netif_napi_del(&adapter->napi[i]); 823 } 824 825 kfree(adapter->napi); 826 adapter->napi = NULL; 827 adapter->num_active_rx_napi = 0; 828 adapter->napi_enabled = false; 829 } 830 831 static int ibmvnic_login(struct net_device *netdev) 832 { 833 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 834 unsigned long timeout = msecs_to_jiffies(20000); 835 int retry_count = 0; 836 int retries = 10; 837 bool retry; 838 int rc; 839 840 do { 841 retry = false; 842 if (retry_count > retries) { 843 netdev_warn(netdev, "Login attempts exceeded\n"); 844 return -1; 845 } 846 847 adapter->init_done_rc = 0; 848 reinit_completion(&adapter->init_done); 849 rc = send_login(adapter); 850 if (rc) 851 return rc; 852 853 if (!wait_for_completion_timeout(&adapter->init_done, 854 timeout)) { 855 netdev_warn(netdev, "Login timed out, retrying...\n"); 856 retry = true; 857 adapter->init_done_rc = 0; 858 retry_count++; 859 continue; 860 } 861 862 if (adapter->init_done_rc == ABORTED) { 863 netdev_warn(netdev, "Login aborted, retrying...\n"); 864 retry = true; 865 adapter->init_done_rc = 0; 866 retry_count++; 867 /* FW or device may be busy, so 868 * wait a bit before retrying login 869 */ 870 msleep(500); 871 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 872 retry_count++; 873 release_sub_crqs(adapter, 1); 874 875 retry = true; 876 netdev_dbg(netdev, 877 "Received partial success, retrying...\n"); 878 adapter->init_done_rc = 0; 879 reinit_completion(&adapter->init_done); 880 send_query_cap(adapter); 881 if (!wait_for_completion_timeout(&adapter->init_done, 882 timeout)) { 883 netdev_warn(netdev, 884 "Capabilities query timed out\n"); 885 return -1; 886 } 887 888 rc = init_sub_crqs(adapter); 889 if (rc) { 890 netdev_warn(netdev, 891 "SCRQ initialization failed\n"); 892 return -1; 893 } 894 895 rc = init_sub_crq_irqs(adapter); 896 if (rc) { 897 netdev_warn(netdev, 898 "SCRQ irq initialization failed\n"); 899 return -1; 900 } 901 } else if (adapter->init_done_rc) { 902 netdev_warn(netdev, "Adapter login failed\n"); 903 return -1; 904 } 905 } while (retry); 906 907 __ibmvnic_set_mac(netdev, adapter->mac_addr); 908 909 netdev_dbg(netdev, "[S:%d] Login succeeded\n", adapter->state); 910 return 0; 911 } 912 913 static void release_login_buffer(struct ibmvnic_adapter *adapter) 914 { 915 kfree(adapter->login_buf); 916 adapter->login_buf = NULL; 917 } 918 919 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 920 { 921 kfree(adapter->login_rsp_buf); 922 adapter->login_rsp_buf = NULL; 923 } 924 925 static void release_resources(struct ibmvnic_adapter *adapter) 926 { 927 release_vpd_data(adapter); 928 929 release_tx_pools(adapter); 930 release_rx_pools(adapter); 931 932 release_napi(adapter); 933 release_login_buffer(adapter); 934 release_login_rsp_buffer(adapter); 935 } 936 937 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 938 { 939 struct net_device *netdev = adapter->netdev; 940 unsigned long timeout = msecs_to_jiffies(20000); 941 union ibmvnic_crq crq; 942 bool resend; 943 int rc; 944 945 netdev_dbg(netdev, "setting link state %d\n", link_state); 946 947 memset(&crq, 0, sizeof(crq)); 948 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 949 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 950 crq.logical_link_state.link_state = link_state; 951 952 do { 953 resend = false; 954 955 reinit_completion(&adapter->init_done); 956 rc = ibmvnic_send_crq(adapter, &crq); 957 if (rc) { 958 netdev_err(netdev, "Failed to set link state\n"); 959 return rc; 960 } 961 962 if (!wait_for_completion_timeout(&adapter->init_done, 963 timeout)) { 964 netdev_err(netdev, "timeout setting link state\n"); 965 return -1; 966 } 967 968 if (adapter->init_done_rc == PARTIALSUCCESS) { 969 /* Partuial success, delay and re-send */ 970 mdelay(1000); 971 resend = true; 972 } else if (adapter->init_done_rc) { 973 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 974 adapter->init_done_rc); 975 return adapter->init_done_rc; 976 } 977 } while (resend); 978 979 return 0; 980 } 981 982 static int set_real_num_queues(struct net_device *netdev) 983 { 984 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 985 int rc; 986 987 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 988 adapter->req_tx_queues, adapter->req_rx_queues); 989 990 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 991 if (rc) { 992 netdev_err(netdev, "failed to set the number of tx queues\n"); 993 return rc; 994 } 995 996 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 997 if (rc) 998 netdev_err(netdev, "failed to set the number of rx queues\n"); 999 1000 return rc; 1001 } 1002 1003 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1004 { 1005 struct device *dev = &adapter->vdev->dev; 1006 union ibmvnic_crq crq; 1007 int len = 0; 1008 int rc; 1009 1010 if (adapter->vpd->buff) 1011 len = adapter->vpd->len; 1012 1013 mutex_lock(&adapter->fw_lock); 1014 adapter->fw_done_rc = 0; 1015 reinit_completion(&adapter->fw_done); 1016 1017 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1018 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1019 rc = ibmvnic_send_crq(adapter, &crq); 1020 if (rc) { 1021 mutex_unlock(&adapter->fw_lock); 1022 return rc; 1023 } 1024 1025 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1026 if (rc) { 1027 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1028 mutex_unlock(&adapter->fw_lock); 1029 return rc; 1030 } 1031 mutex_unlock(&adapter->fw_lock); 1032 1033 if (!adapter->vpd->len) 1034 return -ENODATA; 1035 1036 if (!adapter->vpd->buff) 1037 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1038 else if (adapter->vpd->len != len) 1039 adapter->vpd->buff = 1040 krealloc(adapter->vpd->buff, 1041 adapter->vpd->len, GFP_KERNEL); 1042 1043 if (!adapter->vpd->buff) { 1044 dev_err(dev, "Could allocate VPD buffer\n"); 1045 return -ENOMEM; 1046 } 1047 1048 adapter->vpd->dma_addr = 1049 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1050 DMA_FROM_DEVICE); 1051 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1052 dev_err(dev, "Could not map VPD buffer\n"); 1053 kfree(adapter->vpd->buff); 1054 adapter->vpd->buff = NULL; 1055 return -ENOMEM; 1056 } 1057 1058 mutex_lock(&adapter->fw_lock); 1059 adapter->fw_done_rc = 0; 1060 reinit_completion(&adapter->fw_done); 1061 1062 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1063 crq.get_vpd.cmd = GET_VPD; 1064 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1065 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1066 rc = ibmvnic_send_crq(adapter, &crq); 1067 if (rc) { 1068 kfree(adapter->vpd->buff); 1069 adapter->vpd->buff = NULL; 1070 mutex_unlock(&adapter->fw_lock); 1071 return rc; 1072 } 1073 1074 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1075 if (rc) { 1076 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1077 kfree(adapter->vpd->buff); 1078 adapter->vpd->buff = NULL; 1079 mutex_unlock(&adapter->fw_lock); 1080 return rc; 1081 } 1082 1083 mutex_unlock(&adapter->fw_lock); 1084 return 0; 1085 } 1086 1087 static int init_resources(struct ibmvnic_adapter *adapter) 1088 { 1089 struct net_device *netdev = adapter->netdev; 1090 int rc; 1091 1092 rc = set_real_num_queues(netdev); 1093 if (rc) 1094 return rc; 1095 1096 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1097 if (!adapter->vpd) 1098 return -ENOMEM; 1099 1100 /* Vital Product Data (VPD) */ 1101 rc = ibmvnic_get_vpd(adapter); 1102 if (rc) { 1103 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1104 return rc; 1105 } 1106 1107 adapter->map_id = 1; 1108 1109 rc = init_napi(adapter); 1110 if (rc) 1111 return rc; 1112 1113 send_query_map(adapter); 1114 1115 rc = init_rx_pools(netdev); 1116 if (rc) 1117 return rc; 1118 1119 rc = init_tx_pools(netdev); 1120 return rc; 1121 } 1122 1123 static int __ibmvnic_open(struct net_device *netdev) 1124 { 1125 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1126 enum vnic_state prev_state = adapter->state; 1127 int i, rc; 1128 1129 adapter->state = VNIC_OPENING; 1130 replenish_pools(adapter); 1131 ibmvnic_napi_enable(adapter); 1132 1133 /* We're ready to receive frames, enable the sub-crq interrupts and 1134 * set the logical link state to up 1135 */ 1136 for (i = 0; i < adapter->req_rx_queues; i++) { 1137 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1138 if (prev_state == VNIC_CLOSED) 1139 enable_irq(adapter->rx_scrq[i]->irq); 1140 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1141 } 1142 1143 for (i = 0; i < adapter->req_tx_queues; i++) { 1144 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1145 if (prev_state == VNIC_CLOSED) 1146 enable_irq(adapter->tx_scrq[i]->irq); 1147 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1148 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1149 } 1150 1151 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1152 if (rc) { 1153 for (i = 0; i < adapter->req_rx_queues; i++) 1154 napi_disable(&adapter->napi[i]); 1155 release_resources(adapter); 1156 return rc; 1157 } 1158 1159 netif_tx_start_all_queues(netdev); 1160 1161 if (prev_state == VNIC_CLOSED) { 1162 for (i = 0; i < adapter->req_rx_queues; i++) 1163 napi_schedule(&adapter->napi[i]); 1164 } 1165 1166 adapter->state = VNIC_OPEN; 1167 return rc; 1168 } 1169 1170 static int ibmvnic_open(struct net_device *netdev) 1171 { 1172 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1173 int rc; 1174 1175 /* If device failover is pending, just set device state and return. 1176 * Device operation will be handled by reset routine. 1177 */ 1178 if (adapter->failover_pending) { 1179 adapter->state = VNIC_OPEN; 1180 return 0; 1181 } 1182 1183 if (adapter->state != VNIC_CLOSED) { 1184 rc = ibmvnic_login(netdev); 1185 if (rc) 1186 goto out; 1187 1188 rc = init_resources(adapter); 1189 if (rc) { 1190 netdev_err(netdev, "failed to initialize resources\n"); 1191 release_resources(adapter); 1192 goto out; 1193 } 1194 } 1195 1196 rc = __ibmvnic_open(netdev); 1197 1198 out: 1199 /* If open fails due to a pending failover, set device state and 1200 * return. Device operation will be handled by reset routine. 1201 */ 1202 if (rc && adapter->failover_pending) { 1203 adapter->state = VNIC_OPEN; 1204 rc = 0; 1205 } 1206 return rc; 1207 } 1208 1209 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1210 { 1211 struct ibmvnic_rx_pool *rx_pool; 1212 struct ibmvnic_rx_buff *rx_buff; 1213 u64 rx_entries; 1214 int rx_scrqs; 1215 int i, j; 1216 1217 if (!adapter->rx_pool) 1218 return; 1219 1220 rx_scrqs = adapter->num_active_rx_pools; 1221 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1222 1223 /* Free any remaining skbs in the rx buffer pools */ 1224 for (i = 0; i < rx_scrqs; i++) { 1225 rx_pool = &adapter->rx_pool[i]; 1226 if (!rx_pool || !rx_pool->rx_buff) 1227 continue; 1228 1229 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1230 for (j = 0; j < rx_entries; j++) { 1231 rx_buff = &rx_pool->rx_buff[j]; 1232 if (rx_buff && rx_buff->skb) { 1233 dev_kfree_skb_any(rx_buff->skb); 1234 rx_buff->skb = NULL; 1235 } 1236 } 1237 } 1238 } 1239 1240 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1241 struct ibmvnic_tx_pool *tx_pool) 1242 { 1243 struct ibmvnic_tx_buff *tx_buff; 1244 u64 tx_entries; 1245 int i; 1246 1247 if (!tx_pool || !tx_pool->tx_buff) 1248 return; 1249 1250 tx_entries = tx_pool->num_buffers; 1251 1252 for (i = 0; i < tx_entries; i++) { 1253 tx_buff = &tx_pool->tx_buff[i]; 1254 if (tx_buff && tx_buff->skb) { 1255 dev_kfree_skb_any(tx_buff->skb); 1256 tx_buff->skb = NULL; 1257 } 1258 } 1259 } 1260 1261 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1262 { 1263 int tx_scrqs; 1264 int i; 1265 1266 if (!adapter->tx_pool || !adapter->tso_pool) 1267 return; 1268 1269 tx_scrqs = adapter->num_active_tx_pools; 1270 1271 /* Free any remaining skbs in the tx buffer pools */ 1272 for (i = 0; i < tx_scrqs; i++) { 1273 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1274 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1275 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1276 } 1277 } 1278 1279 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1280 { 1281 struct net_device *netdev = adapter->netdev; 1282 int i; 1283 1284 if (adapter->tx_scrq) { 1285 for (i = 0; i < adapter->req_tx_queues; i++) 1286 if (adapter->tx_scrq[i]->irq) { 1287 netdev_dbg(netdev, 1288 "Disabling tx_scrq[%d] irq\n", i); 1289 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1290 disable_irq(adapter->tx_scrq[i]->irq); 1291 } 1292 } 1293 1294 if (adapter->rx_scrq) { 1295 for (i = 0; i < adapter->req_rx_queues; i++) { 1296 if (adapter->rx_scrq[i]->irq) { 1297 netdev_dbg(netdev, 1298 "Disabling rx_scrq[%d] irq\n", i); 1299 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1300 disable_irq(adapter->rx_scrq[i]->irq); 1301 } 1302 } 1303 } 1304 } 1305 1306 static void ibmvnic_cleanup(struct net_device *netdev) 1307 { 1308 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1309 1310 /* ensure that transmissions are stopped if called by do_reset */ 1311 if (test_bit(0, &adapter->resetting)) 1312 netif_tx_disable(netdev); 1313 else 1314 netif_tx_stop_all_queues(netdev); 1315 1316 ibmvnic_napi_disable(adapter); 1317 ibmvnic_disable_irqs(adapter); 1318 1319 clean_rx_pools(adapter); 1320 clean_tx_pools(adapter); 1321 } 1322 1323 static int __ibmvnic_close(struct net_device *netdev) 1324 { 1325 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1326 int rc = 0; 1327 1328 adapter->state = VNIC_CLOSING; 1329 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1330 adapter->state = VNIC_CLOSED; 1331 return rc; 1332 } 1333 1334 static int ibmvnic_close(struct net_device *netdev) 1335 { 1336 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1337 int rc; 1338 1339 netdev_dbg(netdev, "[S:%d FOP:%d FRR:%d] Closing\n", 1340 adapter->state, adapter->failover_pending, 1341 adapter->force_reset_recovery); 1342 1343 /* If device failover is pending, just set device state and return. 1344 * Device operation will be handled by reset routine. 1345 */ 1346 if (adapter->failover_pending) { 1347 adapter->state = VNIC_CLOSED; 1348 return 0; 1349 } 1350 1351 rc = __ibmvnic_close(netdev); 1352 ibmvnic_cleanup(netdev); 1353 1354 return rc; 1355 } 1356 1357 /** 1358 * build_hdr_data - creates L2/L3/L4 header data buffer 1359 * @hdr_field: bitfield determining needed headers 1360 * @skb: socket buffer 1361 * @hdr_len: array of header lengths 1362 * @hdr_data: buffer to write the header to 1363 * 1364 * Reads hdr_field to determine which headers are needed by firmware. 1365 * Builds a buffer containing these headers. Saves individual header 1366 * lengths and total buffer length to be used to build descriptors. 1367 */ 1368 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1369 int *hdr_len, u8 *hdr_data) 1370 { 1371 int len = 0; 1372 u8 *hdr; 1373 1374 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1375 hdr_len[0] = sizeof(struct vlan_ethhdr); 1376 else 1377 hdr_len[0] = sizeof(struct ethhdr); 1378 1379 if (skb->protocol == htons(ETH_P_IP)) { 1380 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1381 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1382 hdr_len[2] = tcp_hdrlen(skb); 1383 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1384 hdr_len[2] = sizeof(struct udphdr); 1385 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1386 hdr_len[1] = sizeof(struct ipv6hdr); 1387 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1388 hdr_len[2] = tcp_hdrlen(skb); 1389 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1390 hdr_len[2] = sizeof(struct udphdr); 1391 } else if (skb->protocol == htons(ETH_P_ARP)) { 1392 hdr_len[1] = arp_hdr_len(skb->dev); 1393 hdr_len[2] = 0; 1394 } 1395 1396 memset(hdr_data, 0, 120); 1397 if ((hdr_field >> 6) & 1) { 1398 hdr = skb_mac_header(skb); 1399 memcpy(hdr_data, hdr, hdr_len[0]); 1400 len += hdr_len[0]; 1401 } 1402 1403 if ((hdr_field >> 5) & 1) { 1404 hdr = skb_network_header(skb); 1405 memcpy(hdr_data + len, hdr, hdr_len[1]); 1406 len += hdr_len[1]; 1407 } 1408 1409 if ((hdr_field >> 4) & 1) { 1410 hdr = skb_transport_header(skb); 1411 memcpy(hdr_data + len, hdr, hdr_len[2]); 1412 len += hdr_len[2]; 1413 } 1414 return len; 1415 } 1416 1417 /** 1418 * create_hdr_descs - create header and header extension descriptors 1419 * @hdr_field: bitfield determining needed headers 1420 * @hdr_data: buffer containing header data 1421 * @len: length of data buffer 1422 * @hdr_len: array of individual header lengths 1423 * @scrq_arr: descriptor array 1424 * 1425 * Creates header and, if needed, header extension descriptors and 1426 * places them in a descriptor array, scrq_arr 1427 */ 1428 1429 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1430 union sub_crq *scrq_arr) 1431 { 1432 union sub_crq hdr_desc; 1433 int tmp_len = len; 1434 int num_descs = 0; 1435 u8 *data, *cur; 1436 int tmp; 1437 1438 while (tmp_len > 0) { 1439 cur = hdr_data + len - tmp_len; 1440 1441 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1442 if (cur != hdr_data) { 1443 data = hdr_desc.hdr_ext.data; 1444 tmp = tmp_len > 29 ? 29 : tmp_len; 1445 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1446 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1447 hdr_desc.hdr_ext.len = tmp; 1448 } else { 1449 data = hdr_desc.hdr.data; 1450 tmp = tmp_len > 24 ? 24 : tmp_len; 1451 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1452 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1453 hdr_desc.hdr.len = tmp; 1454 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1455 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1456 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1457 hdr_desc.hdr.flag = hdr_field << 1; 1458 } 1459 memcpy(data, cur, tmp); 1460 tmp_len -= tmp; 1461 *scrq_arr = hdr_desc; 1462 scrq_arr++; 1463 num_descs++; 1464 } 1465 1466 return num_descs; 1467 } 1468 1469 /** 1470 * build_hdr_descs_arr - build a header descriptor array 1471 * @txbuff: tx buffer 1472 * @num_entries: number of descriptors to be sent 1473 * @hdr_field: bit field determining which headers will be sent 1474 * 1475 * This function will build a TX descriptor array with applicable 1476 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1477 */ 1478 1479 static void build_hdr_descs_arr(struct sk_buff *skb, 1480 union sub_crq *indir_arr, 1481 int *num_entries, u8 hdr_field) 1482 { 1483 int hdr_len[3] = {0, 0, 0}; 1484 u8 hdr_data[140] = {0}; 1485 int tot_len; 1486 1487 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 1488 hdr_data); 1489 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1490 indir_arr + 1); 1491 } 1492 1493 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1494 struct net_device *netdev) 1495 { 1496 /* For some backing devices, mishandling of small packets 1497 * can result in a loss of connection or TX stall. Device 1498 * architects recommend that no packet should be smaller 1499 * than the minimum MTU value provided to the driver, so 1500 * pad any packets to that length 1501 */ 1502 if (skb->len < netdev->min_mtu) 1503 return skb_put_padto(skb, netdev->min_mtu); 1504 1505 return 0; 1506 } 1507 1508 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 1509 struct ibmvnic_sub_crq_queue *tx_scrq) 1510 { 1511 struct ibmvnic_ind_xmit_queue *ind_bufp; 1512 struct ibmvnic_tx_buff *tx_buff; 1513 struct ibmvnic_tx_pool *tx_pool; 1514 union sub_crq tx_scrq_entry; 1515 int queue_num; 1516 int entries; 1517 int index; 1518 int i; 1519 1520 ind_bufp = &tx_scrq->ind_buf; 1521 entries = (u64)ind_bufp->index; 1522 queue_num = tx_scrq->pool_index; 1523 1524 for (i = entries - 1; i >= 0; --i) { 1525 tx_scrq_entry = ind_bufp->indir_arr[i]; 1526 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 1527 continue; 1528 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 1529 if (index & IBMVNIC_TSO_POOL_MASK) { 1530 tx_pool = &adapter->tso_pool[queue_num]; 1531 index &= ~IBMVNIC_TSO_POOL_MASK; 1532 } else { 1533 tx_pool = &adapter->tx_pool[queue_num]; 1534 } 1535 tx_pool->free_map[tx_pool->consumer_index] = index; 1536 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1537 tx_pool->num_buffers - 1 : 1538 tx_pool->consumer_index - 1; 1539 tx_buff = &tx_pool->tx_buff[index]; 1540 adapter->netdev->stats.tx_packets--; 1541 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 1542 adapter->tx_stats_buffers[queue_num].packets--; 1543 adapter->tx_stats_buffers[queue_num].bytes -= 1544 tx_buff->skb->len; 1545 dev_kfree_skb_any(tx_buff->skb); 1546 tx_buff->skb = NULL; 1547 adapter->netdev->stats.tx_dropped++; 1548 } 1549 ind_bufp->index = 0; 1550 if (atomic_sub_return(entries, &tx_scrq->used) <= 1551 (adapter->req_tx_entries_per_subcrq / 2) && 1552 __netif_subqueue_stopped(adapter->netdev, queue_num)) { 1553 netif_wake_subqueue(adapter->netdev, queue_num); 1554 netdev_dbg(adapter->netdev, "Started queue %d\n", 1555 queue_num); 1556 } 1557 } 1558 1559 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 1560 struct ibmvnic_sub_crq_queue *tx_scrq) 1561 { 1562 struct ibmvnic_ind_xmit_queue *ind_bufp; 1563 u64 dma_addr; 1564 u64 entries; 1565 u64 handle; 1566 int rc; 1567 1568 ind_bufp = &tx_scrq->ind_buf; 1569 dma_addr = (u64)ind_bufp->indir_dma; 1570 entries = (u64)ind_bufp->index; 1571 handle = tx_scrq->handle; 1572 1573 if (!entries) 1574 return 0; 1575 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 1576 if (rc) 1577 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 1578 else 1579 ind_bufp->index = 0; 1580 return 0; 1581 } 1582 1583 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1584 { 1585 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1586 int queue_num = skb_get_queue_mapping(skb); 1587 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1588 struct device *dev = &adapter->vdev->dev; 1589 struct ibmvnic_ind_xmit_queue *ind_bufp; 1590 struct ibmvnic_tx_buff *tx_buff = NULL; 1591 struct ibmvnic_sub_crq_queue *tx_scrq; 1592 struct ibmvnic_tx_pool *tx_pool; 1593 unsigned int tx_send_failed = 0; 1594 netdev_tx_t ret = NETDEV_TX_OK; 1595 unsigned int tx_map_failed = 0; 1596 union sub_crq indir_arr[16]; 1597 unsigned int tx_dropped = 0; 1598 unsigned int tx_packets = 0; 1599 unsigned int tx_bytes = 0; 1600 dma_addr_t data_dma_addr; 1601 struct netdev_queue *txq; 1602 unsigned long lpar_rc; 1603 union sub_crq tx_crq; 1604 unsigned int offset; 1605 int num_entries = 1; 1606 unsigned char *dst; 1607 int index = 0; 1608 u8 proto = 0; 1609 1610 tx_scrq = adapter->tx_scrq[queue_num]; 1611 txq = netdev_get_tx_queue(netdev, queue_num); 1612 ind_bufp = &tx_scrq->ind_buf; 1613 1614 if (test_bit(0, &adapter->resetting)) { 1615 if (!netif_subqueue_stopped(netdev, skb)) 1616 netif_stop_subqueue(netdev, queue_num); 1617 dev_kfree_skb_any(skb); 1618 1619 tx_send_failed++; 1620 tx_dropped++; 1621 ret = NETDEV_TX_OK; 1622 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1623 goto out; 1624 } 1625 1626 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1627 tx_dropped++; 1628 tx_send_failed++; 1629 ret = NETDEV_TX_OK; 1630 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1631 goto out; 1632 } 1633 if (skb_is_gso(skb)) 1634 tx_pool = &adapter->tso_pool[queue_num]; 1635 else 1636 tx_pool = &adapter->tx_pool[queue_num]; 1637 1638 index = tx_pool->free_map[tx_pool->consumer_index]; 1639 1640 if (index == IBMVNIC_INVALID_MAP) { 1641 dev_kfree_skb_any(skb); 1642 tx_send_failed++; 1643 tx_dropped++; 1644 ret = NETDEV_TX_OK; 1645 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1646 goto out; 1647 } 1648 1649 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1650 1651 offset = index * tx_pool->buf_size; 1652 dst = tx_pool->long_term_buff.buff + offset; 1653 memset(dst, 0, tx_pool->buf_size); 1654 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1655 1656 if (skb_shinfo(skb)->nr_frags) { 1657 int cur, i; 1658 1659 /* Copy the head */ 1660 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1661 cur = skb_headlen(skb); 1662 1663 /* Copy the frags */ 1664 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1665 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1666 1667 memcpy(dst + cur, 1668 page_address(skb_frag_page(frag)) + 1669 skb_frag_off(frag), skb_frag_size(frag)); 1670 cur += skb_frag_size(frag); 1671 } 1672 } else { 1673 skb_copy_from_linear_data(skb, dst, skb->len); 1674 } 1675 1676 /* post changes to long_term_buff *dst before VIOS accessing it */ 1677 dma_wmb(); 1678 1679 tx_pool->consumer_index = 1680 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1681 1682 tx_buff = &tx_pool->tx_buff[index]; 1683 tx_buff->skb = skb; 1684 tx_buff->index = index; 1685 tx_buff->pool_index = queue_num; 1686 1687 memset(&tx_crq, 0, sizeof(tx_crq)); 1688 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1689 tx_crq.v1.type = IBMVNIC_TX_DESC; 1690 tx_crq.v1.n_crq_elem = 1; 1691 tx_crq.v1.n_sge = 1; 1692 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1693 1694 if (skb_is_gso(skb)) 1695 tx_crq.v1.correlator = 1696 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1697 else 1698 tx_crq.v1.correlator = cpu_to_be32(index); 1699 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1700 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1701 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1702 1703 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1704 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1705 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1706 } 1707 1708 if (skb->protocol == htons(ETH_P_IP)) { 1709 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1710 proto = ip_hdr(skb)->protocol; 1711 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1712 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1713 proto = ipv6_hdr(skb)->nexthdr; 1714 } 1715 1716 if (proto == IPPROTO_TCP) 1717 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1718 else if (proto == IPPROTO_UDP) 1719 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1720 1721 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1722 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1723 hdrs += 2; 1724 } 1725 if (skb_is_gso(skb)) { 1726 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1727 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1728 hdrs += 2; 1729 } 1730 1731 if ((*hdrs >> 7) & 1) 1732 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 1733 1734 tx_crq.v1.n_crq_elem = num_entries; 1735 tx_buff->num_entries = num_entries; 1736 /* flush buffer if current entry can not fit */ 1737 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 1738 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1739 if (lpar_rc != H_SUCCESS) 1740 goto tx_flush_err; 1741 } 1742 1743 indir_arr[0] = tx_crq; 1744 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 1745 num_entries * sizeof(struct ibmvnic_generic_scrq)); 1746 ind_bufp->index += num_entries; 1747 if (__netdev_tx_sent_queue(txq, skb->len, 1748 netdev_xmit_more() && 1749 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 1750 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1751 if (lpar_rc != H_SUCCESS) 1752 goto tx_err; 1753 } 1754 1755 if (atomic_add_return(num_entries, &tx_scrq->used) 1756 >= adapter->req_tx_entries_per_subcrq) { 1757 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1758 netif_stop_subqueue(netdev, queue_num); 1759 } 1760 1761 tx_packets++; 1762 tx_bytes += skb->len; 1763 txq->trans_start = jiffies; 1764 ret = NETDEV_TX_OK; 1765 goto out; 1766 1767 tx_flush_err: 1768 dev_kfree_skb_any(skb); 1769 tx_buff->skb = NULL; 1770 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1771 tx_pool->num_buffers - 1 : 1772 tx_pool->consumer_index - 1; 1773 tx_dropped++; 1774 tx_err: 1775 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1776 dev_err_ratelimited(dev, "tx: send failed\n"); 1777 1778 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1779 /* Disable TX and report carrier off if queue is closed 1780 * or pending failover. 1781 * Firmware guarantees that a signal will be sent to the 1782 * driver, triggering a reset or some other action. 1783 */ 1784 netif_tx_stop_all_queues(netdev); 1785 netif_carrier_off(netdev); 1786 } 1787 out: 1788 netdev->stats.tx_dropped += tx_dropped; 1789 netdev->stats.tx_bytes += tx_bytes; 1790 netdev->stats.tx_packets += tx_packets; 1791 adapter->tx_send_failed += tx_send_failed; 1792 adapter->tx_map_failed += tx_map_failed; 1793 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1794 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1795 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1796 1797 return ret; 1798 } 1799 1800 static void ibmvnic_set_multi(struct net_device *netdev) 1801 { 1802 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1803 struct netdev_hw_addr *ha; 1804 union ibmvnic_crq crq; 1805 1806 memset(&crq, 0, sizeof(crq)); 1807 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1808 crq.request_capability.cmd = REQUEST_CAPABILITY; 1809 1810 if (netdev->flags & IFF_PROMISC) { 1811 if (!adapter->promisc_supported) 1812 return; 1813 } else { 1814 if (netdev->flags & IFF_ALLMULTI) { 1815 /* Accept all multicast */ 1816 memset(&crq, 0, sizeof(crq)); 1817 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1818 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1819 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1820 ibmvnic_send_crq(adapter, &crq); 1821 } else if (netdev_mc_empty(netdev)) { 1822 /* Reject all multicast */ 1823 memset(&crq, 0, sizeof(crq)); 1824 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1825 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1826 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1827 ibmvnic_send_crq(adapter, &crq); 1828 } else { 1829 /* Accept one or more multicast(s) */ 1830 netdev_for_each_mc_addr(ha, netdev) { 1831 memset(&crq, 0, sizeof(crq)); 1832 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1833 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1834 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1835 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1836 ha->addr); 1837 ibmvnic_send_crq(adapter, &crq); 1838 } 1839 } 1840 } 1841 } 1842 1843 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1844 { 1845 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1846 union ibmvnic_crq crq; 1847 int rc; 1848 1849 if (!is_valid_ether_addr(dev_addr)) { 1850 rc = -EADDRNOTAVAIL; 1851 goto err; 1852 } 1853 1854 memset(&crq, 0, sizeof(crq)); 1855 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1856 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1857 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1858 1859 mutex_lock(&adapter->fw_lock); 1860 adapter->fw_done_rc = 0; 1861 reinit_completion(&adapter->fw_done); 1862 1863 rc = ibmvnic_send_crq(adapter, &crq); 1864 if (rc) { 1865 rc = -EIO; 1866 mutex_unlock(&adapter->fw_lock); 1867 goto err; 1868 } 1869 1870 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1871 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1872 if (rc || adapter->fw_done_rc) { 1873 rc = -EIO; 1874 mutex_unlock(&adapter->fw_lock); 1875 goto err; 1876 } 1877 mutex_unlock(&adapter->fw_lock); 1878 return 0; 1879 err: 1880 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1881 return rc; 1882 } 1883 1884 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1885 { 1886 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1887 struct sockaddr *addr = p; 1888 int rc; 1889 1890 rc = 0; 1891 if (!is_valid_ether_addr(addr->sa_data)) 1892 return -EADDRNOTAVAIL; 1893 1894 if (adapter->state != VNIC_PROBED) { 1895 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1896 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1897 } 1898 1899 return rc; 1900 } 1901 1902 /* 1903 * do_reset returns zero if we are able to keep processing reset events, or 1904 * non-zero if we hit a fatal error and must halt. 1905 */ 1906 static int do_reset(struct ibmvnic_adapter *adapter, 1907 struct ibmvnic_rwi *rwi, u32 reset_state) 1908 { 1909 u64 old_num_rx_queues, old_num_tx_queues; 1910 u64 old_num_rx_slots, old_num_tx_slots; 1911 struct net_device *netdev = adapter->netdev; 1912 int i, rc; 1913 1914 netdev_dbg(adapter->netdev, 1915 "[S:%d FOP:%d] Reset reason %d, reset_state %d\n", 1916 adapter->state, adapter->failover_pending, 1917 rwi->reset_reason, reset_state); 1918 1919 adapter->reset_reason = rwi->reset_reason; 1920 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 1921 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 1922 rtnl_lock(); 1923 1924 /* Now that we have the rtnl lock, clear any pending failover. 1925 * This will ensure ibmvnic_open() has either completed or will 1926 * block until failover is complete. 1927 */ 1928 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 1929 adapter->failover_pending = false; 1930 1931 netif_carrier_off(netdev); 1932 1933 old_num_rx_queues = adapter->req_rx_queues; 1934 old_num_tx_queues = adapter->req_tx_queues; 1935 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1936 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1937 1938 ibmvnic_cleanup(netdev); 1939 1940 if (reset_state == VNIC_OPEN && 1941 adapter->reset_reason != VNIC_RESET_MOBILITY && 1942 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1943 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 1944 rc = __ibmvnic_close(netdev); 1945 if (rc) 1946 goto out; 1947 } else { 1948 adapter->state = VNIC_CLOSING; 1949 1950 /* Release the RTNL lock before link state change and 1951 * re-acquire after the link state change to allow 1952 * linkwatch_event to grab the RTNL lock and run during 1953 * a reset. 1954 */ 1955 rtnl_unlock(); 1956 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1957 rtnl_lock(); 1958 if (rc) 1959 goto out; 1960 1961 if (adapter->state != VNIC_CLOSING) { 1962 rc = -1; 1963 goto out; 1964 } 1965 1966 adapter->state = VNIC_CLOSED; 1967 } 1968 } 1969 1970 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 1971 release_resources(adapter); 1972 release_sub_crqs(adapter, 1); 1973 release_crq_queue(adapter); 1974 } 1975 1976 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1977 /* remove the closed state so when we call open it appears 1978 * we are coming from the probed state. 1979 */ 1980 adapter->state = VNIC_PROBED; 1981 1982 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 1983 rc = init_crq_queue(adapter); 1984 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1985 rc = ibmvnic_reenable_crq_queue(adapter); 1986 release_sub_crqs(adapter, 1); 1987 } else { 1988 rc = ibmvnic_reset_crq(adapter); 1989 if (rc == H_CLOSED || rc == H_SUCCESS) { 1990 rc = vio_enable_interrupts(adapter->vdev); 1991 if (rc) 1992 netdev_err(adapter->netdev, 1993 "Reset failed to enable interrupts. rc=%d\n", 1994 rc); 1995 } 1996 } 1997 1998 if (rc) { 1999 netdev_err(adapter->netdev, 2000 "Reset couldn't initialize crq. rc=%d\n", rc); 2001 goto out; 2002 } 2003 2004 rc = ibmvnic_reset_init(adapter, true); 2005 if (rc) { 2006 rc = IBMVNIC_INIT_FAILED; 2007 goto out; 2008 } 2009 2010 /* If the adapter was in PROBE state prior to the reset, 2011 * exit here. 2012 */ 2013 if (reset_state == VNIC_PROBED) { 2014 rc = 0; 2015 goto out; 2016 } 2017 2018 rc = ibmvnic_login(netdev); 2019 if (rc) 2020 goto out; 2021 2022 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2023 rc = init_resources(adapter); 2024 if (rc) 2025 goto out; 2026 } else if (adapter->req_rx_queues != old_num_rx_queues || 2027 adapter->req_tx_queues != old_num_tx_queues || 2028 adapter->req_rx_add_entries_per_subcrq != 2029 old_num_rx_slots || 2030 adapter->req_tx_entries_per_subcrq != 2031 old_num_tx_slots || 2032 !adapter->rx_pool || 2033 !adapter->tso_pool || 2034 !adapter->tx_pool) { 2035 release_rx_pools(adapter); 2036 release_tx_pools(adapter); 2037 release_napi(adapter); 2038 release_vpd_data(adapter); 2039 2040 rc = init_resources(adapter); 2041 if (rc) 2042 goto out; 2043 2044 } else { 2045 rc = reset_tx_pools(adapter); 2046 if (rc) { 2047 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2048 rc); 2049 goto out; 2050 } 2051 2052 rc = reset_rx_pools(adapter); 2053 if (rc) { 2054 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2055 rc); 2056 goto out; 2057 } 2058 } 2059 ibmvnic_disable_irqs(adapter); 2060 } 2061 adapter->state = VNIC_CLOSED; 2062 2063 if (reset_state == VNIC_CLOSED) { 2064 rc = 0; 2065 goto out; 2066 } 2067 2068 rc = __ibmvnic_open(netdev); 2069 if (rc) { 2070 rc = IBMVNIC_OPEN_FAILED; 2071 goto out; 2072 } 2073 2074 /* refresh device's multicast list */ 2075 ibmvnic_set_multi(netdev); 2076 2077 /* kick napi */ 2078 for (i = 0; i < adapter->req_rx_queues; i++) 2079 napi_schedule(&adapter->napi[i]); 2080 2081 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2082 adapter->reset_reason == VNIC_RESET_MOBILITY) 2083 __netdev_notify_peers(netdev); 2084 2085 rc = 0; 2086 2087 out: 2088 /* restore the adapter state if reset failed */ 2089 if (rc) 2090 adapter->state = reset_state; 2091 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 2092 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2093 rtnl_unlock(); 2094 2095 netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Reset done, rc %d\n", 2096 adapter->state, adapter->failover_pending, rc); 2097 return rc; 2098 } 2099 2100 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2101 struct ibmvnic_rwi *rwi, u32 reset_state) 2102 { 2103 struct net_device *netdev = adapter->netdev; 2104 int rc; 2105 2106 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2107 rwi->reset_reason); 2108 2109 netif_carrier_off(netdev); 2110 adapter->reset_reason = rwi->reset_reason; 2111 2112 ibmvnic_cleanup(netdev); 2113 release_resources(adapter); 2114 release_sub_crqs(adapter, 0); 2115 release_crq_queue(adapter); 2116 2117 /* remove the closed state so when we call open it appears 2118 * we are coming from the probed state. 2119 */ 2120 adapter->state = VNIC_PROBED; 2121 2122 reinit_completion(&adapter->init_done); 2123 rc = init_crq_queue(adapter); 2124 if (rc) { 2125 netdev_err(adapter->netdev, 2126 "Couldn't initialize crq. rc=%d\n", rc); 2127 goto out; 2128 } 2129 2130 rc = ibmvnic_reset_init(adapter, false); 2131 if (rc) 2132 goto out; 2133 2134 /* If the adapter was in PROBE state prior to the reset, 2135 * exit here. 2136 */ 2137 if (reset_state == VNIC_PROBED) 2138 goto out; 2139 2140 rc = ibmvnic_login(netdev); 2141 if (rc) 2142 goto out; 2143 2144 rc = init_resources(adapter); 2145 if (rc) 2146 goto out; 2147 2148 ibmvnic_disable_irqs(adapter); 2149 adapter->state = VNIC_CLOSED; 2150 2151 if (reset_state == VNIC_CLOSED) 2152 goto out; 2153 2154 rc = __ibmvnic_open(netdev); 2155 if (rc) { 2156 rc = IBMVNIC_OPEN_FAILED; 2157 goto out; 2158 } 2159 2160 __netdev_notify_peers(netdev); 2161 out: 2162 /* restore adapter state if reset failed */ 2163 if (rc) 2164 adapter->state = reset_state; 2165 netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Hard reset done, rc %d\n", 2166 adapter->state, adapter->failover_pending, rc); 2167 return rc; 2168 } 2169 2170 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2171 { 2172 struct ibmvnic_rwi *rwi; 2173 unsigned long flags; 2174 2175 spin_lock_irqsave(&adapter->rwi_lock, flags); 2176 2177 if (!list_empty(&adapter->rwi_list)) { 2178 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2179 list); 2180 list_del(&rwi->list); 2181 } else { 2182 rwi = NULL; 2183 } 2184 2185 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2186 return rwi; 2187 } 2188 2189 static void __ibmvnic_reset(struct work_struct *work) 2190 { 2191 struct ibmvnic_rwi *rwi; 2192 struct ibmvnic_adapter *adapter; 2193 bool saved_state = false; 2194 unsigned long flags; 2195 u32 reset_state; 2196 int rc = 0; 2197 2198 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2199 2200 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2201 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2202 IBMVNIC_RESET_DELAY); 2203 return; 2204 } 2205 2206 rwi = get_next_rwi(adapter); 2207 while (rwi) { 2208 spin_lock_irqsave(&adapter->state_lock, flags); 2209 2210 if (adapter->state == VNIC_REMOVING || 2211 adapter->state == VNIC_REMOVED) { 2212 spin_unlock_irqrestore(&adapter->state_lock, flags); 2213 kfree(rwi); 2214 rc = EBUSY; 2215 break; 2216 } 2217 2218 if (!saved_state) { 2219 reset_state = adapter->state; 2220 saved_state = true; 2221 } 2222 spin_unlock_irqrestore(&adapter->state_lock, flags); 2223 2224 if (adapter->force_reset_recovery) { 2225 /* Since we are doing a hard reset now, clear the 2226 * failover_pending flag so we don't ignore any 2227 * future MOBILITY or other resets. 2228 */ 2229 adapter->failover_pending = false; 2230 2231 /* Transport event occurred during previous reset */ 2232 if (adapter->wait_for_reset) { 2233 /* Previous was CHANGE_PARAM; caller locked */ 2234 adapter->force_reset_recovery = false; 2235 rc = do_hard_reset(adapter, rwi, reset_state); 2236 } else { 2237 rtnl_lock(); 2238 adapter->force_reset_recovery = false; 2239 rc = do_hard_reset(adapter, rwi, reset_state); 2240 rtnl_unlock(); 2241 } 2242 if (rc) { 2243 /* give backing device time to settle down */ 2244 netdev_dbg(adapter->netdev, 2245 "[S:%d] Hard reset failed, waiting 60 secs\n", 2246 adapter->state); 2247 set_current_state(TASK_UNINTERRUPTIBLE); 2248 schedule_timeout(60 * HZ); 2249 } 2250 } else { 2251 rc = do_reset(adapter, rwi, reset_state); 2252 } 2253 kfree(rwi); 2254 adapter->last_reset_time = jiffies; 2255 2256 if (rc) 2257 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2258 2259 rwi = get_next_rwi(adapter); 2260 2261 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2262 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2263 adapter->force_reset_recovery = true; 2264 } 2265 2266 if (adapter->wait_for_reset) { 2267 adapter->reset_done_rc = rc; 2268 complete(&adapter->reset_done); 2269 } 2270 2271 clear_bit_unlock(0, &adapter->resetting); 2272 2273 netdev_dbg(adapter->netdev, 2274 "[S:%d FRR:%d WFR:%d] Done processing resets\n", 2275 adapter->state, adapter->force_reset_recovery, 2276 adapter->wait_for_reset); 2277 } 2278 2279 static void __ibmvnic_delayed_reset(struct work_struct *work) 2280 { 2281 struct ibmvnic_adapter *adapter; 2282 2283 adapter = container_of(work, struct ibmvnic_adapter, 2284 ibmvnic_delayed_reset.work); 2285 __ibmvnic_reset(&adapter->ibmvnic_reset); 2286 } 2287 2288 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2289 enum ibmvnic_reset_reason reason) 2290 { 2291 struct list_head *entry, *tmp_entry; 2292 struct ibmvnic_rwi *rwi, *tmp; 2293 struct net_device *netdev = adapter->netdev; 2294 unsigned long flags; 2295 int ret; 2296 2297 spin_lock_irqsave(&adapter->rwi_lock, flags); 2298 2299 /* If failover is pending don't schedule any other reset. 2300 * Instead let the failover complete. If there is already a 2301 * a failover reset scheduled, we will detect and drop the 2302 * duplicate reset when walking the ->rwi_list below. 2303 */ 2304 if (adapter->state == VNIC_REMOVING || 2305 adapter->state == VNIC_REMOVED || 2306 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2307 ret = EBUSY; 2308 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2309 goto err; 2310 } 2311 2312 if (adapter->state == VNIC_PROBING) { 2313 netdev_warn(netdev, "Adapter reset during probe\n"); 2314 adapter->init_done_rc = EAGAIN; 2315 ret = EAGAIN; 2316 goto err; 2317 } 2318 2319 list_for_each(entry, &adapter->rwi_list) { 2320 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2321 if (tmp->reset_reason == reason) { 2322 netdev_dbg(netdev, "Skipping matching reset, reason=%d\n", 2323 reason); 2324 ret = EBUSY; 2325 goto err; 2326 } 2327 } 2328 2329 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2330 if (!rwi) { 2331 ret = ENOMEM; 2332 goto err; 2333 } 2334 /* if we just received a transport event, 2335 * flush reset queue and process this reset 2336 */ 2337 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2338 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2339 list_del(entry); 2340 } 2341 rwi->reset_reason = reason; 2342 list_add_tail(&rwi->list, &adapter->rwi_list); 2343 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2344 schedule_work(&adapter->ibmvnic_reset); 2345 2346 ret = 0; 2347 err: 2348 /* ibmvnic_close() below can block, so drop the lock first */ 2349 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2350 2351 if (ret == ENOMEM) 2352 ibmvnic_close(netdev); 2353 2354 return -ret; 2355 } 2356 2357 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2358 { 2359 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2360 2361 if (test_bit(0, &adapter->resetting)) { 2362 netdev_err(adapter->netdev, 2363 "Adapter is resetting, skip timeout reset\n"); 2364 return; 2365 } 2366 /* No queuing up reset until at least 5 seconds (default watchdog val) 2367 * after last reset 2368 */ 2369 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2370 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2371 return; 2372 } 2373 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2374 } 2375 2376 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2377 struct ibmvnic_rx_buff *rx_buff) 2378 { 2379 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2380 2381 rx_buff->skb = NULL; 2382 2383 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2384 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2385 2386 atomic_dec(&pool->available); 2387 } 2388 2389 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2390 { 2391 struct ibmvnic_sub_crq_queue *rx_scrq; 2392 struct ibmvnic_adapter *adapter; 2393 struct net_device *netdev; 2394 int frames_processed; 2395 int scrq_num; 2396 2397 netdev = napi->dev; 2398 adapter = netdev_priv(netdev); 2399 scrq_num = (int)(napi - adapter->napi); 2400 frames_processed = 0; 2401 rx_scrq = adapter->rx_scrq[scrq_num]; 2402 2403 restart_poll: 2404 while (frames_processed < budget) { 2405 struct sk_buff *skb; 2406 struct ibmvnic_rx_buff *rx_buff; 2407 union sub_crq *next; 2408 u32 length; 2409 u16 offset; 2410 u8 flags = 0; 2411 2412 if (unlikely(test_bit(0, &adapter->resetting) && 2413 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2414 enable_scrq_irq(adapter, rx_scrq); 2415 napi_complete_done(napi, frames_processed); 2416 return frames_processed; 2417 } 2418 2419 if (!pending_scrq(adapter, rx_scrq)) 2420 break; 2421 next = ibmvnic_next_scrq(adapter, rx_scrq); 2422 rx_buff = (struct ibmvnic_rx_buff *) 2423 be64_to_cpu(next->rx_comp.correlator); 2424 /* do error checking */ 2425 if (next->rx_comp.rc) { 2426 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2427 be16_to_cpu(next->rx_comp.rc)); 2428 /* free the entry */ 2429 next->rx_comp.first = 0; 2430 dev_kfree_skb_any(rx_buff->skb); 2431 remove_buff_from_pool(adapter, rx_buff); 2432 continue; 2433 } else if (!rx_buff->skb) { 2434 /* free the entry */ 2435 next->rx_comp.first = 0; 2436 remove_buff_from_pool(adapter, rx_buff); 2437 continue; 2438 } 2439 2440 length = be32_to_cpu(next->rx_comp.len); 2441 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2442 flags = next->rx_comp.flags; 2443 skb = rx_buff->skb; 2444 /* load long_term_buff before copying to skb */ 2445 dma_rmb(); 2446 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2447 length); 2448 2449 /* VLAN Header has been stripped by the system firmware and 2450 * needs to be inserted by the driver 2451 */ 2452 if (adapter->rx_vlan_header_insertion && 2453 (flags & IBMVNIC_VLAN_STRIPPED)) 2454 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2455 ntohs(next->rx_comp.vlan_tci)); 2456 2457 /* free the entry */ 2458 next->rx_comp.first = 0; 2459 remove_buff_from_pool(adapter, rx_buff); 2460 2461 skb_put(skb, length); 2462 skb->protocol = eth_type_trans(skb, netdev); 2463 skb_record_rx_queue(skb, scrq_num); 2464 2465 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2466 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2467 skb->ip_summed = CHECKSUM_UNNECESSARY; 2468 } 2469 2470 length = skb->len; 2471 napi_gro_receive(napi, skb); /* send it up */ 2472 netdev->stats.rx_packets++; 2473 netdev->stats.rx_bytes += length; 2474 adapter->rx_stats_buffers[scrq_num].packets++; 2475 adapter->rx_stats_buffers[scrq_num].bytes += length; 2476 frames_processed++; 2477 } 2478 2479 if (adapter->state != VNIC_CLOSING && 2480 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2481 adapter->req_rx_add_entries_per_subcrq / 2) || 2482 frames_processed < budget)) 2483 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2484 if (frames_processed < budget) { 2485 if (napi_complete_done(napi, frames_processed)) { 2486 enable_scrq_irq(adapter, rx_scrq); 2487 if (pending_scrq(adapter, rx_scrq)) { 2488 if (napi_reschedule(napi)) { 2489 disable_scrq_irq(adapter, rx_scrq); 2490 goto restart_poll; 2491 } 2492 } 2493 } 2494 } 2495 return frames_processed; 2496 } 2497 2498 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2499 { 2500 int rc, ret; 2501 2502 adapter->fallback.mtu = adapter->req_mtu; 2503 adapter->fallback.rx_queues = adapter->req_rx_queues; 2504 adapter->fallback.tx_queues = adapter->req_tx_queues; 2505 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2506 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2507 2508 reinit_completion(&adapter->reset_done); 2509 adapter->wait_for_reset = true; 2510 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2511 2512 if (rc) { 2513 ret = rc; 2514 goto out; 2515 } 2516 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2517 if (rc) { 2518 ret = -ENODEV; 2519 goto out; 2520 } 2521 2522 ret = 0; 2523 if (adapter->reset_done_rc) { 2524 ret = -EIO; 2525 adapter->desired.mtu = adapter->fallback.mtu; 2526 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2527 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2528 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2529 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2530 2531 reinit_completion(&adapter->reset_done); 2532 adapter->wait_for_reset = true; 2533 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2534 if (rc) { 2535 ret = rc; 2536 goto out; 2537 } 2538 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2539 60000); 2540 if (rc) { 2541 ret = -ENODEV; 2542 goto out; 2543 } 2544 } 2545 out: 2546 adapter->wait_for_reset = false; 2547 2548 return ret; 2549 } 2550 2551 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2552 { 2553 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2554 2555 adapter->desired.mtu = new_mtu + ETH_HLEN; 2556 2557 return wait_for_reset(adapter); 2558 } 2559 2560 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2561 struct net_device *dev, 2562 netdev_features_t features) 2563 { 2564 /* Some backing hardware adapters can not 2565 * handle packets with a MSS less than 224 2566 * or with only one segment. 2567 */ 2568 if (skb_is_gso(skb)) { 2569 if (skb_shinfo(skb)->gso_size < 224 || 2570 skb_shinfo(skb)->gso_segs == 1) 2571 features &= ~NETIF_F_GSO_MASK; 2572 } 2573 2574 return features; 2575 } 2576 2577 static const struct net_device_ops ibmvnic_netdev_ops = { 2578 .ndo_open = ibmvnic_open, 2579 .ndo_stop = ibmvnic_close, 2580 .ndo_start_xmit = ibmvnic_xmit, 2581 .ndo_set_rx_mode = ibmvnic_set_multi, 2582 .ndo_set_mac_address = ibmvnic_set_mac, 2583 .ndo_validate_addr = eth_validate_addr, 2584 .ndo_tx_timeout = ibmvnic_tx_timeout, 2585 .ndo_change_mtu = ibmvnic_change_mtu, 2586 .ndo_features_check = ibmvnic_features_check, 2587 }; 2588 2589 /* ethtool functions */ 2590 2591 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2592 struct ethtool_link_ksettings *cmd) 2593 { 2594 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2595 int rc; 2596 2597 rc = send_query_phys_parms(adapter); 2598 if (rc) { 2599 adapter->speed = SPEED_UNKNOWN; 2600 adapter->duplex = DUPLEX_UNKNOWN; 2601 } 2602 cmd->base.speed = adapter->speed; 2603 cmd->base.duplex = adapter->duplex; 2604 cmd->base.port = PORT_FIBRE; 2605 cmd->base.phy_address = 0; 2606 cmd->base.autoneg = AUTONEG_ENABLE; 2607 2608 return 0; 2609 } 2610 2611 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2612 struct ethtool_drvinfo *info) 2613 { 2614 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2615 2616 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2617 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2618 strscpy(info->fw_version, adapter->fw_version, 2619 sizeof(info->fw_version)); 2620 } 2621 2622 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2623 { 2624 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2625 2626 return adapter->msg_enable; 2627 } 2628 2629 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2630 { 2631 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2632 2633 adapter->msg_enable = data; 2634 } 2635 2636 static u32 ibmvnic_get_link(struct net_device *netdev) 2637 { 2638 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2639 2640 /* Don't need to send a query because we request a logical link up at 2641 * init and then we wait for link state indications 2642 */ 2643 return adapter->logical_link_state; 2644 } 2645 2646 static void ibmvnic_get_ringparam(struct net_device *netdev, 2647 struct ethtool_ringparam *ring) 2648 { 2649 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2650 2651 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2652 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2653 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2654 } else { 2655 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2656 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2657 } 2658 ring->rx_mini_max_pending = 0; 2659 ring->rx_jumbo_max_pending = 0; 2660 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2661 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2662 ring->rx_mini_pending = 0; 2663 ring->rx_jumbo_pending = 0; 2664 } 2665 2666 static int ibmvnic_set_ringparam(struct net_device *netdev, 2667 struct ethtool_ringparam *ring) 2668 { 2669 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2670 int ret; 2671 2672 ret = 0; 2673 adapter->desired.rx_entries = ring->rx_pending; 2674 adapter->desired.tx_entries = ring->tx_pending; 2675 2676 ret = wait_for_reset(adapter); 2677 2678 if (!ret && 2679 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2680 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2681 netdev_info(netdev, 2682 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2683 ring->rx_pending, ring->tx_pending, 2684 adapter->req_rx_add_entries_per_subcrq, 2685 adapter->req_tx_entries_per_subcrq); 2686 return ret; 2687 } 2688 2689 static void ibmvnic_get_channels(struct net_device *netdev, 2690 struct ethtool_channels *channels) 2691 { 2692 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2693 2694 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2695 channels->max_rx = adapter->max_rx_queues; 2696 channels->max_tx = adapter->max_tx_queues; 2697 } else { 2698 channels->max_rx = IBMVNIC_MAX_QUEUES; 2699 channels->max_tx = IBMVNIC_MAX_QUEUES; 2700 } 2701 2702 channels->max_other = 0; 2703 channels->max_combined = 0; 2704 channels->rx_count = adapter->req_rx_queues; 2705 channels->tx_count = adapter->req_tx_queues; 2706 channels->other_count = 0; 2707 channels->combined_count = 0; 2708 } 2709 2710 static int ibmvnic_set_channels(struct net_device *netdev, 2711 struct ethtool_channels *channels) 2712 { 2713 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2714 int ret; 2715 2716 ret = 0; 2717 adapter->desired.rx_queues = channels->rx_count; 2718 adapter->desired.tx_queues = channels->tx_count; 2719 2720 ret = wait_for_reset(adapter); 2721 2722 if (!ret && 2723 (adapter->req_rx_queues != channels->rx_count || 2724 adapter->req_tx_queues != channels->tx_count)) 2725 netdev_info(netdev, 2726 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2727 channels->rx_count, channels->tx_count, 2728 adapter->req_rx_queues, adapter->req_tx_queues); 2729 return ret; 2730 } 2731 2732 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2733 { 2734 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2735 int i; 2736 2737 switch (stringset) { 2738 case ETH_SS_STATS: 2739 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2740 i++, data += ETH_GSTRING_LEN) 2741 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2742 2743 for (i = 0; i < adapter->req_tx_queues; i++) { 2744 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2745 data += ETH_GSTRING_LEN; 2746 2747 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2748 data += ETH_GSTRING_LEN; 2749 2750 snprintf(data, ETH_GSTRING_LEN, 2751 "tx%d_dropped_packets", i); 2752 data += ETH_GSTRING_LEN; 2753 } 2754 2755 for (i = 0; i < adapter->req_rx_queues; i++) { 2756 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2757 data += ETH_GSTRING_LEN; 2758 2759 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2760 data += ETH_GSTRING_LEN; 2761 2762 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2763 data += ETH_GSTRING_LEN; 2764 } 2765 break; 2766 2767 case ETH_SS_PRIV_FLAGS: 2768 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2769 strcpy(data + i * ETH_GSTRING_LEN, 2770 ibmvnic_priv_flags[i]); 2771 break; 2772 default: 2773 return; 2774 } 2775 } 2776 2777 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2778 { 2779 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2780 2781 switch (sset) { 2782 case ETH_SS_STATS: 2783 return ARRAY_SIZE(ibmvnic_stats) + 2784 adapter->req_tx_queues * NUM_TX_STATS + 2785 adapter->req_rx_queues * NUM_RX_STATS; 2786 case ETH_SS_PRIV_FLAGS: 2787 return ARRAY_SIZE(ibmvnic_priv_flags); 2788 default: 2789 return -EOPNOTSUPP; 2790 } 2791 } 2792 2793 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2794 struct ethtool_stats *stats, u64 *data) 2795 { 2796 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2797 union ibmvnic_crq crq; 2798 int i, j; 2799 int rc; 2800 2801 memset(&crq, 0, sizeof(crq)); 2802 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2803 crq.request_statistics.cmd = REQUEST_STATISTICS; 2804 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2805 crq.request_statistics.len = 2806 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2807 2808 /* Wait for data to be written */ 2809 reinit_completion(&adapter->stats_done); 2810 rc = ibmvnic_send_crq(adapter, &crq); 2811 if (rc) 2812 return; 2813 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2814 if (rc) 2815 return; 2816 2817 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2818 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 2819 (adapter, ibmvnic_stats[i].offset)); 2820 2821 for (j = 0; j < adapter->req_tx_queues; j++) { 2822 data[i] = adapter->tx_stats_buffers[j].packets; 2823 i++; 2824 data[i] = adapter->tx_stats_buffers[j].bytes; 2825 i++; 2826 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2827 i++; 2828 } 2829 2830 for (j = 0; j < adapter->req_rx_queues; j++) { 2831 data[i] = adapter->rx_stats_buffers[j].packets; 2832 i++; 2833 data[i] = adapter->rx_stats_buffers[j].bytes; 2834 i++; 2835 data[i] = adapter->rx_stats_buffers[j].interrupts; 2836 i++; 2837 } 2838 } 2839 2840 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2841 { 2842 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2843 2844 return adapter->priv_flags; 2845 } 2846 2847 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2848 { 2849 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2850 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2851 2852 if (which_maxes) 2853 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2854 else 2855 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2856 2857 return 0; 2858 } 2859 2860 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2861 .get_drvinfo = ibmvnic_get_drvinfo, 2862 .get_msglevel = ibmvnic_get_msglevel, 2863 .set_msglevel = ibmvnic_set_msglevel, 2864 .get_link = ibmvnic_get_link, 2865 .get_ringparam = ibmvnic_get_ringparam, 2866 .set_ringparam = ibmvnic_set_ringparam, 2867 .get_channels = ibmvnic_get_channels, 2868 .set_channels = ibmvnic_set_channels, 2869 .get_strings = ibmvnic_get_strings, 2870 .get_sset_count = ibmvnic_get_sset_count, 2871 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2872 .get_link_ksettings = ibmvnic_get_link_ksettings, 2873 .get_priv_flags = ibmvnic_get_priv_flags, 2874 .set_priv_flags = ibmvnic_set_priv_flags, 2875 }; 2876 2877 /* Routines for managing CRQs/sCRQs */ 2878 2879 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2880 struct ibmvnic_sub_crq_queue *scrq) 2881 { 2882 int rc; 2883 2884 if (!scrq) { 2885 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 2886 return -EINVAL; 2887 } 2888 2889 if (scrq->irq) { 2890 free_irq(scrq->irq, scrq); 2891 irq_dispose_mapping(scrq->irq); 2892 scrq->irq = 0; 2893 } 2894 2895 if (scrq->msgs) { 2896 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2897 atomic_set(&scrq->used, 0); 2898 scrq->cur = 0; 2899 scrq->ind_buf.index = 0; 2900 } else { 2901 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 2902 return -EINVAL; 2903 } 2904 2905 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2906 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2907 return rc; 2908 } 2909 2910 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2911 { 2912 int i, rc; 2913 2914 if (!adapter->tx_scrq || !adapter->rx_scrq) 2915 return -EINVAL; 2916 2917 for (i = 0; i < adapter->req_tx_queues; i++) { 2918 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2919 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2920 if (rc) 2921 return rc; 2922 } 2923 2924 for (i = 0; i < adapter->req_rx_queues; i++) { 2925 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2926 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2927 if (rc) 2928 return rc; 2929 } 2930 2931 return rc; 2932 } 2933 2934 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2935 struct ibmvnic_sub_crq_queue *scrq, 2936 bool do_h_free) 2937 { 2938 struct device *dev = &adapter->vdev->dev; 2939 long rc; 2940 2941 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2942 2943 if (do_h_free) { 2944 /* Close the sub-crqs */ 2945 do { 2946 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2947 adapter->vdev->unit_address, 2948 scrq->crq_num); 2949 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2950 2951 if (rc) { 2952 netdev_err(adapter->netdev, 2953 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2954 scrq->crq_num, rc); 2955 } 2956 } 2957 2958 dma_free_coherent(dev, 2959 IBMVNIC_IND_ARR_SZ, 2960 scrq->ind_buf.indir_arr, 2961 scrq->ind_buf.indir_dma); 2962 2963 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2964 DMA_BIDIRECTIONAL); 2965 free_pages((unsigned long)scrq->msgs, 2); 2966 kfree(scrq); 2967 } 2968 2969 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2970 *adapter) 2971 { 2972 struct device *dev = &adapter->vdev->dev; 2973 struct ibmvnic_sub_crq_queue *scrq; 2974 int rc; 2975 2976 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2977 if (!scrq) 2978 return NULL; 2979 2980 scrq->msgs = 2981 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2982 if (!scrq->msgs) { 2983 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2984 goto zero_page_failed; 2985 } 2986 2987 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2988 DMA_BIDIRECTIONAL); 2989 if (dma_mapping_error(dev, scrq->msg_token)) { 2990 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2991 goto map_failed; 2992 } 2993 2994 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2995 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2996 2997 if (rc == H_RESOURCE) 2998 rc = ibmvnic_reset_crq(adapter); 2999 3000 if (rc == H_CLOSED) { 3001 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3002 } else if (rc) { 3003 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3004 goto reg_failed; 3005 } 3006 3007 scrq->adapter = adapter; 3008 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3009 scrq->ind_buf.index = 0; 3010 3011 scrq->ind_buf.indir_arr = 3012 dma_alloc_coherent(dev, 3013 IBMVNIC_IND_ARR_SZ, 3014 &scrq->ind_buf.indir_dma, 3015 GFP_KERNEL); 3016 3017 if (!scrq->ind_buf.indir_arr) 3018 goto indir_failed; 3019 3020 spin_lock_init(&scrq->lock); 3021 3022 netdev_dbg(adapter->netdev, 3023 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3024 scrq->crq_num, scrq->hw_irq, scrq->irq); 3025 3026 return scrq; 3027 3028 indir_failed: 3029 do { 3030 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3031 adapter->vdev->unit_address, 3032 scrq->crq_num); 3033 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3034 reg_failed: 3035 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3036 DMA_BIDIRECTIONAL); 3037 map_failed: 3038 free_pages((unsigned long)scrq->msgs, 2); 3039 zero_page_failed: 3040 kfree(scrq); 3041 3042 return NULL; 3043 } 3044 3045 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3046 { 3047 int i; 3048 3049 if (adapter->tx_scrq) { 3050 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3051 if (!adapter->tx_scrq[i]) 3052 continue; 3053 3054 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3055 i); 3056 if (adapter->tx_scrq[i]->irq) { 3057 free_irq(adapter->tx_scrq[i]->irq, 3058 adapter->tx_scrq[i]); 3059 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3060 adapter->tx_scrq[i]->irq = 0; 3061 } 3062 3063 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3064 do_h_free); 3065 } 3066 3067 kfree(adapter->tx_scrq); 3068 adapter->tx_scrq = NULL; 3069 adapter->num_active_tx_scrqs = 0; 3070 } 3071 3072 if (adapter->rx_scrq) { 3073 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3074 if (!adapter->rx_scrq[i]) 3075 continue; 3076 3077 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3078 i); 3079 if (adapter->rx_scrq[i]->irq) { 3080 free_irq(adapter->rx_scrq[i]->irq, 3081 adapter->rx_scrq[i]); 3082 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3083 adapter->rx_scrq[i]->irq = 0; 3084 } 3085 3086 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3087 do_h_free); 3088 } 3089 3090 kfree(adapter->rx_scrq); 3091 adapter->rx_scrq = NULL; 3092 adapter->num_active_rx_scrqs = 0; 3093 } 3094 } 3095 3096 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3097 struct ibmvnic_sub_crq_queue *scrq) 3098 { 3099 struct device *dev = &adapter->vdev->dev; 3100 unsigned long rc; 3101 3102 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3103 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3104 if (rc) 3105 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3106 scrq->hw_irq, rc); 3107 return rc; 3108 } 3109 3110 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3111 struct ibmvnic_sub_crq_queue *scrq) 3112 { 3113 struct device *dev = &adapter->vdev->dev; 3114 unsigned long rc; 3115 3116 if (scrq->hw_irq > 0x100000000ULL) { 3117 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3118 return 1; 3119 } 3120 3121 if (test_bit(0, &adapter->resetting) && 3122 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3123 u64 val = (0xff000000) | scrq->hw_irq; 3124 3125 rc = plpar_hcall_norets(H_EOI, val); 3126 /* H_EOI would fail with rc = H_FUNCTION when running 3127 * in XIVE mode which is expected, but not an error. 3128 */ 3129 if (rc && rc != H_FUNCTION) 3130 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3131 val, rc); 3132 } 3133 3134 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3135 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3136 if (rc) 3137 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3138 scrq->hw_irq, rc); 3139 return rc; 3140 } 3141 3142 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3143 struct ibmvnic_sub_crq_queue *scrq) 3144 { 3145 struct device *dev = &adapter->vdev->dev; 3146 struct ibmvnic_tx_pool *tx_pool; 3147 struct ibmvnic_tx_buff *txbuff; 3148 struct netdev_queue *txq; 3149 union sub_crq *next; 3150 int index; 3151 int i; 3152 3153 restart_loop: 3154 while (pending_scrq(adapter, scrq)) { 3155 unsigned int pool = scrq->pool_index; 3156 int num_entries = 0; 3157 int total_bytes = 0; 3158 int num_packets = 0; 3159 3160 next = ibmvnic_next_scrq(adapter, scrq); 3161 for (i = 0; i < next->tx_comp.num_comps; i++) { 3162 if (next->tx_comp.rcs[i]) 3163 dev_err(dev, "tx error %x\n", 3164 next->tx_comp.rcs[i]); 3165 index = be32_to_cpu(next->tx_comp.correlators[i]); 3166 if (index & IBMVNIC_TSO_POOL_MASK) { 3167 tx_pool = &adapter->tso_pool[pool]; 3168 index &= ~IBMVNIC_TSO_POOL_MASK; 3169 } else { 3170 tx_pool = &adapter->tx_pool[pool]; 3171 } 3172 3173 txbuff = &tx_pool->tx_buff[index]; 3174 num_packets++; 3175 num_entries += txbuff->num_entries; 3176 if (txbuff->skb) { 3177 total_bytes += txbuff->skb->len; 3178 dev_consume_skb_irq(txbuff->skb); 3179 txbuff->skb = NULL; 3180 } else { 3181 netdev_warn(adapter->netdev, 3182 "TX completion received with NULL socket buffer\n"); 3183 } 3184 tx_pool->free_map[tx_pool->producer_index] = index; 3185 tx_pool->producer_index = 3186 (tx_pool->producer_index + 1) % 3187 tx_pool->num_buffers; 3188 } 3189 /* remove tx_comp scrq*/ 3190 next->tx_comp.first = 0; 3191 3192 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3193 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3194 3195 if (atomic_sub_return(num_entries, &scrq->used) <= 3196 (adapter->req_tx_entries_per_subcrq / 2) && 3197 __netif_subqueue_stopped(adapter->netdev, 3198 scrq->pool_index)) { 3199 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3200 netdev_dbg(adapter->netdev, "Started queue %d\n", 3201 scrq->pool_index); 3202 } 3203 } 3204 3205 enable_scrq_irq(adapter, scrq); 3206 3207 if (pending_scrq(adapter, scrq)) { 3208 disable_scrq_irq(adapter, scrq); 3209 goto restart_loop; 3210 } 3211 3212 return 0; 3213 } 3214 3215 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3216 { 3217 struct ibmvnic_sub_crq_queue *scrq = instance; 3218 struct ibmvnic_adapter *adapter = scrq->adapter; 3219 3220 disable_scrq_irq(adapter, scrq); 3221 ibmvnic_complete_tx(adapter, scrq); 3222 3223 return IRQ_HANDLED; 3224 } 3225 3226 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3227 { 3228 struct ibmvnic_sub_crq_queue *scrq = instance; 3229 struct ibmvnic_adapter *adapter = scrq->adapter; 3230 3231 /* When booting a kdump kernel we can hit pending interrupts 3232 * prior to completing driver initialization. 3233 */ 3234 if (unlikely(adapter->state != VNIC_OPEN)) 3235 return IRQ_NONE; 3236 3237 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3238 3239 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3240 disable_scrq_irq(adapter, scrq); 3241 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3242 } 3243 3244 return IRQ_HANDLED; 3245 } 3246 3247 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3248 { 3249 struct device *dev = &adapter->vdev->dev; 3250 struct ibmvnic_sub_crq_queue *scrq; 3251 int i = 0, j = 0; 3252 int rc = 0; 3253 3254 for (i = 0; i < adapter->req_tx_queues; i++) { 3255 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3256 i); 3257 scrq = adapter->tx_scrq[i]; 3258 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3259 3260 if (!scrq->irq) { 3261 rc = -EINVAL; 3262 dev_err(dev, "Error mapping irq\n"); 3263 goto req_tx_irq_failed; 3264 } 3265 3266 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3267 adapter->vdev->unit_address, i); 3268 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3269 0, scrq->name, scrq); 3270 3271 if (rc) { 3272 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3273 scrq->irq, rc); 3274 irq_dispose_mapping(scrq->irq); 3275 goto req_tx_irq_failed; 3276 } 3277 } 3278 3279 for (i = 0; i < adapter->req_rx_queues; i++) { 3280 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3281 i); 3282 scrq = adapter->rx_scrq[i]; 3283 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3284 if (!scrq->irq) { 3285 rc = -EINVAL; 3286 dev_err(dev, "Error mapping irq\n"); 3287 goto req_rx_irq_failed; 3288 } 3289 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3290 adapter->vdev->unit_address, i); 3291 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3292 0, scrq->name, scrq); 3293 if (rc) { 3294 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3295 scrq->irq, rc); 3296 irq_dispose_mapping(scrq->irq); 3297 goto req_rx_irq_failed; 3298 } 3299 } 3300 return rc; 3301 3302 req_rx_irq_failed: 3303 for (j = 0; j < i; j++) { 3304 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3305 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3306 } 3307 i = adapter->req_tx_queues; 3308 req_tx_irq_failed: 3309 for (j = 0; j < i; j++) { 3310 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3311 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3312 } 3313 release_sub_crqs(adapter, 1); 3314 return rc; 3315 } 3316 3317 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3318 { 3319 struct device *dev = &adapter->vdev->dev; 3320 struct ibmvnic_sub_crq_queue **allqueues; 3321 int registered_queues = 0; 3322 int total_queues; 3323 int more = 0; 3324 int i; 3325 3326 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3327 3328 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3329 if (!allqueues) 3330 return -1; 3331 3332 for (i = 0; i < total_queues; i++) { 3333 allqueues[i] = init_sub_crq_queue(adapter); 3334 if (!allqueues[i]) { 3335 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3336 break; 3337 } 3338 registered_queues++; 3339 } 3340 3341 /* Make sure we were able to register the minimum number of queues */ 3342 if (registered_queues < 3343 adapter->min_tx_queues + adapter->min_rx_queues) { 3344 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3345 goto tx_failed; 3346 } 3347 3348 /* Distribute the failed allocated queues*/ 3349 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3350 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3351 switch (i % 3) { 3352 case 0: 3353 if (adapter->req_rx_queues > adapter->min_rx_queues) 3354 adapter->req_rx_queues--; 3355 else 3356 more++; 3357 break; 3358 case 1: 3359 if (adapter->req_tx_queues > adapter->min_tx_queues) 3360 adapter->req_tx_queues--; 3361 else 3362 more++; 3363 break; 3364 } 3365 } 3366 3367 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3368 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3369 if (!adapter->tx_scrq) 3370 goto tx_failed; 3371 3372 for (i = 0; i < adapter->req_tx_queues; i++) { 3373 adapter->tx_scrq[i] = allqueues[i]; 3374 adapter->tx_scrq[i]->pool_index = i; 3375 adapter->num_active_tx_scrqs++; 3376 } 3377 3378 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3379 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3380 if (!adapter->rx_scrq) 3381 goto rx_failed; 3382 3383 for (i = 0; i < adapter->req_rx_queues; i++) { 3384 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3385 adapter->rx_scrq[i]->scrq_num = i; 3386 adapter->num_active_rx_scrqs++; 3387 } 3388 3389 kfree(allqueues); 3390 return 0; 3391 3392 rx_failed: 3393 kfree(adapter->tx_scrq); 3394 adapter->tx_scrq = NULL; 3395 tx_failed: 3396 for (i = 0; i < registered_queues; i++) 3397 release_sub_crq_queue(adapter, allqueues[i], 1); 3398 kfree(allqueues); 3399 return -1; 3400 } 3401 3402 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3403 { 3404 struct device *dev = &adapter->vdev->dev; 3405 union ibmvnic_crq crq; 3406 int max_entries; 3407 3408 if (!retry) { 3409 /* Sub-CRQ entries are 32 byte long */ 3410 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3411 3412 if (adapter->min_tx_entries_per_subcrq > entries_page || 3413 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3414 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3415 return; 3416 } 3417 3418 if (adapter->desired.mtu) 3419 adapter->req_mtu = adapter->desired.mtu; 3420 else 3421 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3422 3423 if (!adapter->desired.tx_entries) 3424 adapter->desired.tx_entries = 3425 adapter->max_tx_entries_per_subcrq; 3426 if (!adapter->desired.rx_entries) 3427 adapter->desired.rx_entries = 3428 adapter->max_rx_add_entries_per_subcrq; 3429 3430 max_entries = IBMVNIC_MAX_LTB_SIZE / 3431 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3432 3433 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3434 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3435 adapter->desired.tx_entries = max_entries; 3436 } 3437 3438 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3439 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3440 adapter->desired.rx_entries = max_entries; 3441 } 3442 3443 if (adapter->desired.tx_entries) 3444 adapter->req_tx_entries_per_subcrq = 3445 adapter->desired.tx_entries; 3446 else 3447 adapter->req_tx_entries_per_subcrq = 3448 adapter->max_tx_entries_per_subcrq; 3449 3450 if (adapter->desired.rx_entries) 3451 adapter->req_rx_add_entries_per_subcrq = 3452 adapter->desired.rx_entries; 3453 else 3454 adapter->req_rx_add_entries_per_subcrq = 3455 adapter->max_rx_add_entries_per_subcrq; 3456 3457 if (adapter->desired.tx_queues) 3458 adapter->req_tx_queues = 3459 adapter->desired.tx_queues; 3460 else 3461 adapter->req_tx_queues = 3462 adapter->opt_tx_comp_sub_queues; 3463 3464 if (adapter->desired.rx_queues) 3465 adapter->req_rx_queues = 3466 adapter->desired.rx_queues; 3467 else 3468 adapter->req_rx_queues = 3469 adapter->opt_rx_comp_queues; 3470 3471 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3472 } 3473 3474 memset(&crq, 0, sizeof(crq)); 3475 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3476 crq.request_capability.cmd = REQUEST_CAPABILITY; 3477 3478 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3479 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3480 atomic_inc(&adapter->running_cap_crqs); 3481 ibmvnic_send_crq(adapter, &crq); 3482 3483 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3484 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3485 atomic_inc(&adapter->running_cap_crqs); 3486 ibmvnic_send_crq(adapter, &crq); 3487 3488 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3489 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3490 atomic_inc(&adapter->running_cap_crqs); 3491 ibmvnic_send_crq(adapter, &crq); 3492 3493 crq.request_capability.capability = 3494 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3495 crq.request_capability.number = 3496 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3497 atomic_inc(&adapter->running_cap_crqs); 3498 ibmvnic_send_crq(adapter, &crq); 3499 3500 crq.request_capability.capability = 3501 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3502 crq.request_capability.number = 3503 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3504 atomic_inc(&adapter->running_cap_crqs); 3505 ibmvnic_send_crq(adapter, &crq); 3506 3507 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3508 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3509 atomic_inc(&adapter->running_cap_crqs); 3510 ibmvnic_send_crq(adapter, &crq); 3511 3512 if (adapter->netdev->flags & IFF_PROMISC) { 3513 if (adapter->promisc_supported) { 3514 crq.request_capability.capability = 3515 cpu_to_be16(PROMISC_REQUESTED); 3516 crq.request_capability.number = cpu_to_be64(1); 3517 atomic_inc(&adapter->running_cap_crqs); 3518 ibmvnic_send_crq(adapter, &crq); 3519 } 3520 } else { 3521 crq.request_capability.capability = 3522 cpu_to_be16(PROMISC_REQUESTED); 3523 crq.request_capability.number = cpu_to_be64(0); 3524 atomic_inc(&adapter->running_cap_crqs); 3525 ibmvnic_send_crq(adapter, &crq); 3526 } 3527 } 3528 3529 static int pending_scrq(struct ibmvnic_adapter *adapter, 3530 struct ibmvnic_sub_crq_queue *scrq) 3531 { 3532 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3533 int rc; 3534 3535 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 3536 3537 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3538 * contents of the SCRQ descriptor 3539 */ 3540 dma_rmb(); 3541 3542 return rc; 3543 } 3544 3545 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3546 struct ibmvnic_sub_crq_queue *scrq) 3547 { 3548 union sub_crq *entry; 3549 unsigned long flags; 3550 3551 spin_lock_irqsave(&scrq->lock, flags); 3552 entry = &scrq->msgs[scrq->cur]; 3553 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3554 if (++scrq->cur == scrq->size) 3555 scrq->cur = 0; 3556 } else { 3557 entry = NULL; 3558 } 3559 spin_unlock_irqrestore(&scrq->lock, flags); 3560 3561 /* Ensure that the SCRQ valid flag is loaded prior to loading the 3562 * contents of the SCRQ descriptor 3563 */ 3564 dma_rmb(); 3565 3566 return entry; 3567 } 3568 3569 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3570 { 3571 struct ibmvnic_crq_queue *queue = &adapter->crq; 3572 union ibmvnic_crq *crq; 3573 3574 crq = &queue->msgs[queue->cur]; 3575 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3576 if (++queue->cur == queue->size) 3577 queue->cur = 0; 3578 } else { 3579 crq = NULL; 3580 } 3581 3582 return crq; 3583 } 3584 3585 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3586 { 3587 switch (rc) { 3588 case H_PARAMETER: 3589 dev_warn_ratelimited(dev, 3590 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3591 func, rc); 3592 break; 3593 case H_CLOSED: 3594 dev_warn_ratelimited(dev, 3595 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3596 func, rc); 3597 break; 3598 default: 3599 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3600 break; 3601 } 3602 } 3603 3604 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3605 u64 remote_handle, u64 ioba, u64 num_entries) 3606 { 3607 unsigned int ua = adapter->vdev->unit_address; 3608 struct device *dev = &adapter->vdev->dev; 3609 int rc; 3610 3611 /* Make sure the hypervisor sees the complete request */ 3612 dma_wmb(); 3613 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3614 cpu_to_be64(remote_handle), 3615 ioba, num_entries); 3616 3617 if (rc) 3618 print_subcrq_error(dev, rc, __func__); 3619 3620 return rc; 3621 } 3622 3623 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3624 union ibmvnic_crq *crq) 3625 { 3626 unsigned int ua = adapter->vdev->unit_address; 3627 struct device *dev = &adapter->vdev->dev; 3628 u64 *u64_crq = (u64 *)crq; 3629 int rc; 3630 3631 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3632 (unsigned long)cpu_to_be64(u64_crq[0]), 3633 (unsigned long)cpu_to_be64(u64_crq[1])); 3634 3635 if (!adapter->crq.active && 3636 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3637 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3638 return -EINVAL; 3639 } 3640 3641 /* Make sure the hypervisor sees the complete request */ 3642 dma_wmb(); 3643 3644 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3645 cpu_to_be64(u64_crq[0]), 3646 cpu_to_be64(u64_crq[1])); 3647 3648 if (rc) { 3649 if (rc == H_CLOSED) { 3650 dev_warn(dev, "CRQ Queue closed\n"); 3651 /* do not reset, report the fail, wait for passive init from server */ 3652 } 3653 3654 dev_warn(dev, "Send error (rc=%d)\n", rc); 3655 } 3656 3657 return rc; 3658 } 3659 3660 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3661 { 3662 struct device *dev = &adapter->vdev->dev; 3663 union ibmvnic_crq crq; 3664 int retries = 100; 3665 int rc; 3666 3667 memset(&crq, 0, sizeof(crq)); 3668 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3669 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3670 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3671 3672 do { 3673 rc = ibmvnic_send_crq(adapter, &crq); 3674 if (rc != H_CLOSED) 3675 break; 3676 retries--; 3677 msleep(50); 3678 3679 } while (retries > 0); 3680 3681 if (rc) { 3682 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3683 return rc; 3684 } 3685 3686 return 0; 3687 } 3688 3689 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3690 { 3691 union ibmvnic_crq crq; 3692 3693 memset(&crq, 0, sizeof(crq)); 3694 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3695 crq.version_exchange.cmd = VERSION_EXCHANGE; 3696 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3697 3698 return ibmvnic_send_crq(adapter, &crq); 3699 } 3700 3701 struct vnic_login_client_data { 3702 u8 type; 3703 __be16 len; 3704 char name[]; 3705 } __packed; 3706 3707 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3708 { 3709 int len; 3710 3711 /* Calculate the amount of buffer space needed for the 3712 * vnic client data in the login buffer. There are four entries, 3713 * OS name, LPAR name, device name, and a null last entry. 3714 */ 3715 len = 4 * sizeof(struct vnic_login_client_data); 3716 len += 6; /* "Linux" plus NULL */ 3717 len += strlen(utsname()->nodename) + 1; 3718 len += strlen(adapter->netdev->name) + 1; 3719 3720 return len; 3721 } 3722 3723 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3724 struct vnic_login_client_data *vlcd) 3725 { 3726 const char *os_name = "Linux"; 3727 int len; 3728 3729 /* Type 1 - LPAR OS */ 3730 vlcd->type = 1; 3731 len = strlen(os_name) + 1; 3732 vlcd->len = cpu_to_be16(len); 3733 strncpy(vlcd->name, os_name, len); 3734 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3735 3736 /* Type 2 - LPAR name */ 3737 vlcd->type = 2; 3738 len = strlen(utsname()->nodename) + 1; 3739 vlcd->len = cpu_to_be16(len); 3740 strncpy(vlcd->name, utsname()->nodename, len); 3741 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3742 3743 /* Type 3 - device name */ 3744 vlcd->type = 3; 3745 len = strlen(adapter->netdev->name) + 1; 3746 vlcd->len = cpu_to_be16(len); 3747 strncpy(vlcd->name, adapter->netdev->name, len); 3748 } 3749 3750 static int send_login(struct ibmvnic_adapter *adapter) 3751 { 3752 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3753 struct ibmvnic_login_buffer *login_buffer; 3754 struct device *dev = &adapter->vdev->dev; 3755 struct vnic_login_client_data *vlcd; 3756 dma_addr_t rsp_buffer_token; 3757 dma_addr_t buffer_token; 3758 size_t rsp_buffer_size; 3759 union ibmvnic_crq crq; 3760 int client_data_len; 3761 size_t buffer_size; 3762 __be64 *tx_list_p; 3763 __be64 *rx_list_p; 3764 int rc; 3765 int i; 3766 3767 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3768 netdev_err(adapter->netdev, 3769 "RX or TX queues are not allocated, device login failed\n"); 3770 return -1; 3771 } 3772 3773 release_login_buffer(adapter); 3774 release_login_rsp_buffer(adapter); 3775 3776 client_data_len = vnic_client_data_len(adapter); 3777 3778 buffer_size = 3779 sizeof(struct ibmvnic_login_buffer) + 3780 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3781 client_data_len; 3782 3783 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3784 if (!login_buffer) 3785 goto buf_alloc_failed; 3786 3787 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3788 DMA_TO_DEVICE); 3789 if (dma_mapping_error(dev, buffer_token)) { 3790 dev_err(dev, "Couldn't map login buffer\n"); 3791 goto buf_map_failed; 3792 } 3793 3794 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3795 sizeof(u64) * adapter->req_tx_queues + 3796 sizeof(u64) * adapter->req_rx_queues + 3797 sizeof(u64) * adapter->req_rx_queues + 3798 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3799 3800 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3801 if (!login_rsp_buffer) 3802 goto buf_rsp_alloc_failed; 3803 3804 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3805 rsp_buffer_size, DMA_FROM_DEVICE); 3806 if (dma_mapping_error(dev, rsp_buffer_token)) { 3807 dev_err(dev, "Couldn't map login rsp buffer\n"); 3808 goto buf_rsp_map_failed; 3809 } 3810 3811 adapter->login_buf = login_buffer; 3812 adapter->login_buf_token = buffer_token; 3813 adapter->login_buf_sz = buffer_size; 3814 adapter->login_rsp_buf = login_rsp_buffer; 3815 adapter->login_rsp_buf_token = rsp_buffer_token; 3816 adapter->login_rsp_buf_sz = rsp_buffer_size; 3817 3818 login_buffer->len = cpu_to_be32(buffer_size); 3819 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3820 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3821 login_buffer->off_txcomp_subcrqs = 3822 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3823 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3824 login_buffer->off_rxcomp_subcrqs = 3825 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3826 sizeof(u64) * adapter->req_tx_queues); 3827 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3828 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3829 3830 tx_list_p = (__be64 *)((char *)login_buffer + 3831 sizeof(struct ibmvnic_login_buffer)); 3832 rx_list_p = (__be64 *)((char *)login_buffer + 3833 sizeof(struct ibmvnic_login_buffer) + 3834 sizeof(u64) * adapter->req_tx_queues); 3835 3836 for (i = 0; i < adapter->req_tx_queues; i++) { 3837 if (adapter->tx_scrq[i]) { 3838 tx_list_p[i] = 3839 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 3840 } 3841 } 3842 3843 for (i = 0; i < adapter->req_rx_queues; i++) { 3844 if (adapter->rx_scrq[i]) { 3845 rx_list_p[i] = 3846 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 3847 } 3848 } 3849 3850 /* Insert vNIC login client data */ 3851 vlcd = (struct vnic_login_client_data *) 3852 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3853 login_buffer->client_data_offset = 3854 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3855 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3856 3857 vnic_add_client_data(adapter, vlcd); 3858 3859 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3860 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3861 netdev_dbg(adapter->netdev, "%016lx\n", 3862 ((unsigned long *)(adapter->login_buf))[i]); 3863 } 3864 3865 memset(&crq, 0, sizeof(crq)); 3866 crq.login.first = IBMVNIC_CRQ_CMD; 3867 crq.login.cmd = LOGIN; 3868 crq.login.ioba = cpu_to_be32(buffer_token); 3869 crq.login.len = cpu_to_be32(buffer_size); 3870 3871 adapter->login_pending = true; 3872 rc = ibmvnic_send_crq(adapter, &crq); 3873 if (rc) { 3874 adapter->login_pending = false; 3875 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 3876 goto buf_rsp_map_failed; 3877 } 3878 3879 return 0; 3880 3881 buf_rsp_map_failed: 3882 kfree(login_rsp_buffer); 3883 adapter->login_rsp_buf = NULL; 3884 buf_rsp_alloc_failed: 3885 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3886 buf_map_failed: 3887 kfree(login_buffer); 3888 adapter->login_buf = NULL; 3889 buf_alloc_failed: 3890 return -1; 3891 } 3892 3893 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3894 u32 len, u8 map_id) 3895 { 3896 union ibmvnic_crq crq; 3897 3898 memset(&crq, 0, sizeof(crq)); 3899 crq.request_map.first = IBMVNIC_CRQ_CMD; 3900 crq.request_map.cmd = REQUEST_MAP; 3901 crq.request_map.map_id = map_id; 3902 crq.request_map.ioba = cpu_to_be32(addr); 3903 crq.request_map.len = cpu_to_be32(len); 3904 return ibmvnic_send_crq(adapter, &crq); 3905 } 3906 3907 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3908 { 3909 union ibmvnic_crq crq; 3910 3911 memset(&crq, 0, sizeof(crq)); 3912 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3913 crq.request_unmap.cmd = REQUEST_UNMAP; 3914 crq.request_unmap.map_id = map_id; 3915 return ibmvnic_send_crq(adapter, &crq); 3916 } 3917 3918 static void send_query_map(struct ibmvnic_adapter *adapter) 3919 { 3920 union ibmvnic_crq crq; 3921 3922 memset(&crq, 0, sizeof(crq)); 3923 crq.query_map.first = IBMVNIC_CRQ_CMD; 3924 crq.query_map.cmd = QUERY_MAP; 3925 ibmvnic_send_crq(adapter, &crq); 3926 } 3927 3928 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3929 static void send_query_cap(struct ibmvnic_adapter *adapter) 3930 { 3931 union ibmvnic_crq crq; 3932 3933 atomic_set(&adapter->running_cap_crqs, 0); 3934 memset(&crq, 0, sizeof(crq)); 3935 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3936 crq.query_capability.cmd = QUERY_CAPABILITY; 3937 3938 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3939 atomic_inc(&adapter->running_cap_crqs); 3940 ibmvnic_send_crq(adapter, &crq); 3941 3942 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3943 atomic_inc(&adapter->running_cap_crqs); 3944 ibmvnic_send_crq(adapter, &crq); 3945 3946 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3947 atomic_inc(&adapter->running_cap_crqs); 3948 ibmvnic_send_crq(adapter, &crq); 3949 3950 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3951 atomic_inc(&adapter->running_cap_crqs); 3952 ibmvnic_send_crq(adapter, &crq); 3953 3954 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3955 atomic_inc(&adapter->running_cap_crqs); 3956 ibmvnic_send_crq(adapter, &crq); 3957 3958 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3959 atomic_inc(&adapter->running_cap_crqs); 3960 ibmvnic_send_crq(adapter, &crq); 3961 3962 crq.query_capability.capability = 3963 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3964 atomic_inc(&adapter->running_cap_crqs); 3965 ibmvnic_send_crq(adapter, &crq); 3966 3967 crq.query_capability.capability = 3968 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3969 atomic_inc(&adapter->running_cap_crqs); 3970 ibmvnic_send_crq(adapter, &crq); 3971 3972 crq.query_capability.capability = 3973 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3974 atomic_inc(&adapter->running_cap_crqs); 3975 ibmvnic_send_crq(adapter, &crq); 3976 3977 crq.query_capability.capability = 3978 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3979 atomic_inc(&adapter->running_cap_crqs); 3980 ibmvnic_send_crq(adapter, &crq); 3981 3982 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3983 atomic_inc(&adapter->running_cap_crqs); 3984 ibmvnic_send_crq(adapter, &crq); 3985 3986 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3987 atomic_inc(&adapter->running_cap_crqs); 3988 ibmvnic_send_crq(adapter, &crq); 3989 3990 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3991 atomic_inc(&adapter->running_cap_crqs); 3992 ibmvnic_send_crq(adapter, &crq); 3993 3994 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3995 atomic_inc(&adapter->running_cap_crqs); 3996 ibmvnic_send_crq(adapter, &crq); 3997 3998 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3999 atomic_inc(&adapter->running_cap_crqs); 4000 ibmvnic_send_crq(adapter, &crq); 4001 4002 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4003 atomic_inc(&adapter->running_cap_crqs); 4004 ibmvnic_send_crq(adapter, &crq); 4005 4006 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4007 atomic_inc(&adapter->running_cap_crqs); 4008 ibmvnic_send_crq(adapter, &crq); 4009 4010 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4011 atomic_inc(&adapter->running_cap_crqs); 4012 ibmvnic_send_crq(adapter, &crq); 4013 4014 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4015 atomic_inc(&adapter->running_cap_crqs); 4016 ibmvnic_send_crq(adapter, &crq); 4017 4018 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4019 atomic_inc(&adapter->running_cap_crqs); 4020 ibmvnic_send_crq(adapter, &crq); 4021 4022 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4023 atomic_inc(&adapter->running_cap_crqs); 4024 ibmvnic_send_crq(adapter, &crq); 4025 4026 crq.query_capability.capability = 4027 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4028 atomic_inc(&adapter->running_cap_crqs); 4029 ibmvnic_send_crq(adapter, &crq); 4030 4031 crq.query_capability.capability = 4032 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4033 atomic_inc(&adapter->running_cap_crqs); 4034 ibmvnic_send_crq(adapter, &crq); 4035 4036 crq.query_capability.capability = 4037 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4038 atomic_inc(&adapter->running_cap_crqs); 4039 ibmvnic_send_crq(adapter, &crq); 4040 4041 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4042 atomic_inc(&adapter->running_cap_crqs); 4043 ibmvnic_send_crq(adapter, &crq); 4044 } 4045 4046 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4047 { 4048 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4049 struct device *dev = &adapter->vdev->dev; 4050 union ibmvnic_crq crq; 4051 4052 adapter->ip_offload_tok = 4053 dma_map_single(dev, 4054 &adapter->ip_offload_buf, 4055 buf_sz, 4056 DMA_FROM_DEVICE); 4057 4058 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4059 if (!firmware_has_feature(FW_FEATURE_CMO)) 4060 dev_err(dev, "Couldn't map offload buffer\n"); 4061 return; 4062 } 4063 4064 memset(&crq, 0, sizeof(crq)); 4065 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4066 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4067 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4068 crq.query_ip_offload.ioba = 4069 cpu_to_be32(adapter->ip_offload_tok); 4070 4071 ibmvnic_send_crq(adapter, &crq); 4072 } 4073 4074 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4075 { 4076 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4077 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4078 struct device *dev = &adapter->vdev->dev; 4079 netdev_features_t old_hw_features = 0; 4080 union ibmvnic_crq crq; 4081 4082 adapter->ip_offload_ctrl_tok = 4083 dma_map_single(dev, 4084 ctrl_buf, 4085 sizeof(adapter->ip_offload_ctrl), 4086 DMA_TO_DEVICE); 4087 4088 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4089 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4090 return; 4091 } 4092 4093 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4094 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4095 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4096 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4097 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4098 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4099 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4100 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4101 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4102 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4103 4104 /* large_rx disabled for now, additional features needed */ 4105 ctrl_buf->large_rx_ipv4 = 0; 4106 ctrl_buf->large_rx_ipv6 = 0; 4107 4108 if (adapter->state != VNIC_PROBING) { 4109 old_hw_features = adapter->netdev->hw_features; 4110 adapter->netdev->hw_features = 0; 4111 } 4112 4113 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4114 4115 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4116 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4117 4118 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4119 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4120 4121 if ((adapter->netdev->features & 4122 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4123 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4124 4125 if (buf->large_tx_ipv4) 4126 adapter->netdev->hw_features |= NETIF_F_TSO; 4127 if (buf->large_tx_ipv6) 4128 adapter->netdev->hw_features |= NETIF_F_TSO6; 4129 4130 if (adapter->state == VNIC_PROBING) { 4131 adapter->netdev->features |= adapter->netdev->hw_features; 4132 } else if (old_hw_features != adapter->netdev->hw_features) { 4133 netdev_features_t tmp = 0; 4134 4135 /* disable features no longer supported */ 4136 adapter->netdev->features &= adapter->netdev->hw_features; 4137 /* turn on features now supported if previously enabled */ 4138 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4139 adapter->netdev->hw_features; 4140 adapter->netdev->features |= 4141 tmp & adapter->netdev->wanted_features; 4142 } 4143 4144 memset(&crq, 0, sizeof(crq)); 4145 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4146 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4147 crq.control_ip_offload.len = 4148 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4149 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4150 ibmvnic_send_crq(adapter, &crq); 4151 } 4152 4153 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4154 struct ibmvnic_adapter *adapter) 4155 { 4156 struct device *dev = &adapter->vdev->dev; 4157 4158 if (crq->get_vpd_size_rsp.rc.code) { 4159 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4160 crq->get_vpd_size_rsp.rc.code); 4161 complete(&adapter->fw_done); 4162 return; 4163 } 4164 4165 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4166 complete(&adapter->fw_done); 4167 } 4168 4169 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4170 struct ibmvnic_adapter *adapter) 4171 { 4172 struct device *dev = &adapter->vdev->dev; 4173 unsigned char *substr = NULL; 4174 u8 fw_level_len = 0; 4175 4176 memset(adapter->fw_version, 0, 32); 4177 4178 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4179 DMA_FROM_DEVICE); 4180 4181 if (crq->get_vpd_rsp.rc.code) { 4182 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4183 crq->get_vpd_rsp.rc.code); 4184 goto complete; 4185 } 4186 4187 /* get the position of the firmware version info 4188 * located after the ASCII 'RM' substring in the buffer 4189 */ 4190 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4191 if (!substr) { 4192 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4193 goto complete; 4194 } 4195 4196 /* get length of firmware level ASCII substring */ 4197 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4198 fw_level_len = *(substr + 2); 4199 } else { 4200 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4201 goto complete; 4202 } 4203 4204 /* copy firmware version string from vpd into adapter */ 4205 if ((substr + 3 + fw_level_len) < 4206 (adapter->vpd->buff + adapter->vpd->len)) { 4207 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4208 } else { 4209 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4210 } 4211 4212 complete: 4213 if (adapter->fw_version[0] == '\0') 4214 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4215 complete(&adapter->fw_done); 4216 } 4217 4218 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4219 { 4220 struct device *dev = &adapter->vdev->dev; 4221 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4222 int i; 4223 4224 dma_unmap_single(dev, adapter->ip_offload_tok, 4225 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4226 4227 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4228 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4229 netdev_dbg(adapter->netdev, "%016lx\n", 4230 ((unsigned long *)(buf))[i]); 4231 4232 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4233 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4234 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4235 buf->tcp_ipv4_chksum); 4236 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4237 buf->tcp_ipv6_chksum); 4238 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4239 buf->udp_ipv4_chksum); 4240 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4241 buf->udp_ipv6_chksum); 4242 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4243 buf->large_tx_ipv4); 4244 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4245 buf->large_tx_ipv6); 4246 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4247 buf->large_rx_ipv4); 4248 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4249 buf->large_rx_ipv6); 4250 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4251 buf->max_ipv4_header_size); 4252 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4253 buf->max_ipv6_header_size); 4254 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4255 buf->max_tcp_header_size); 4256 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4257 buf->max_udp_header_size); 4258 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4259 buf->max_large_tx_size); 4260 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4261 buf->max_large_rx_size); 4262 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4263 buf->ipv6_extension_header); 4264 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4265 buf->tcp_pseudosum_req); 4266 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4267 buf->num_ipv6_ext_headers); 4268 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4269 buf->off_ipv6_ext_headers); 4270 4271 send_control_ip_offload(adapter); 4272 } 4273 4274 static const char *ibmvnic_fw_err_cause(u16 cause) 4275 { 4276 switch (cause) { 4277 case ADAPTER_PROBLEM: 4278 return "adapter problem"; 4279 case BUS_PROBLEM: 4280 return "bus problem"; 4281 case FW_PROBLEM: 4282 return "firmware problem"; 4283 case DD_PROBLEM: 4284 return "device driver problem"; 4285 case EEH_RECOVERY: 4286 return "EEH recovery"; 4287 case FW_UPDATED: 4288 return "firmware updated"; 4289 case LOW_MEMORY: 4290 return "low Memory"; 4291 default: 4292 return "unknown"; 4293 } 4294 } 4295 4296 static void handle_error_indication(union ibmvnic_crq *crq, 4297 struct ibmvnic_adapter *adapter) 4298 { 4299 struct device *dev = &adapter->vdev->dev; 4300 u16 cause; 4301 4302 cause = be16_to_cpu(crq->error_indication.error_cause); 4303 4304 dev_warn_ratelimited(dev, 4305 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4306 crq->error_indication.flags 4307 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4308 ibmvnic_fw_err_cause(cause)); 4309 4310 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4311 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4312 else 4313 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4314 } 4315 4316 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4317 struct ibmvnic_adapter *adapter) 4318 { 4319 struct net_device *netdev = adapter->netdev; 4320 struct device *dev = &adapter->vdev->dev; 4321 long rc; 4322 4323 rc = crq->change_mac_addr_rsp.rc.code; 4324 if (rc) { 4325 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4326 goto out; 4327 } 4328 /* crq->change_mac_addr.mac_addr is the requested one 4329 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4330 */ 4331 ether_addr_copy(netdev->dev_addr, 4332 &crq->change_mac_addr_rsp.mac_addr[0]); 4333 ether_addr_copy(adapter->mac_addr, 4334 &crq->change_mac_addr_rsp.mac_addr[0]); 4335 out: 4336 complete(&adapter->fw_done); 4337 return rc; 4338 } 4339 4340 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4341 struct ibmvnic_adapter *adapter) 4342 { 4343 struct device *dev = &adapter->vdev->dev; 4344 u64 *req_value; 4345 char *name; 4346 4347 atomic_dec(&adapter->running_cap_crqs); 4348 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4349 case REQ_TX_QUEUES: 4350 req_value = &adapter->req_tx_queues; 4351 name = "tx"; 4352 break; 4353 case REQ_RX_QUEUES: 4354 req_value = &adapter->req_rx_queues; 4355 name = "rx"; 4356 break; 4357 case REQ_RX_ADD_QUEUES: 4358 req_value = &adapter->req_rx_add_queues; 4359 name = "rx_add"; 4360 break; 4361 case REQ_TX_ENTRIES_PER_SUBCRQ: 4362 req_value = &adapter->req_tx_entries_per_subcrq; 4363 name = "tx_entries_per_subcrq"; 4364 break; 4365 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4366 req_value = &adapter->req_rx_add_entries_per_subcrq; 4367 name = "rx_add_entries_per_subcrq"; 4368 break; 4369 case REQ_MTU: 4370 req_value = &adapter->req_mtu; 4371 name = "mtu"; 4372 break; 4373 case PROMISC_REQUESTED: 4374 req_value = &adapter->promisc; 4375 name = "promisc"; 4376 break; 4377 default: 4378 dev_err(dev, "Got invalid cap request rsp %d\n", 4379 crq->request_capability.capability); 4380 return; 4381 } 4382 4383 switch (crq->request_capability_rsp.rc.code) { 4384 case SUCCESS: 4385 break; 4386 case PARTIALSUCCESS: 4387 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4388 *req_value, 4389 (long)be64_to_cpu(crq->request_capability_rsp.number), 4390 name); 4391 4392 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4393 REQ_MTU) { 4394 pr_err("mtu of %llu is not supported. Reverting.\n", 4395 *req_value); 4396 *req_value = adapter->fallback.mtu; 4397 } else { 4398 *req_value = 4399 be64_to_cpu(crq->request_capability_rsp.number); 4400 } 4401 4402 send_request_cap(adapter, 1); 4403 return; 4404 default: 4405 dev_err(dev, "Error %d in request cap rsp\n", 4406 crq->request_capability_rsp.rc.code); 4407 return; 4408 } 4409 4410 /* Done receiving requested capabilities, query IP offload support */ 4411 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4412 adapter->wait_capability = false; 4413 send_query_ip_offload(adapter); 4414 } 4415 } 4416 4417 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4418 struct ibmvnic_adapter *adapter) 4419 { 4420 struct device *dev = &adapter->vdev->dev; 4421 struct net_device *netdev = adapter->netdev; 4422 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4423 struct ibmvnic_login_buffer *login = adapter->login_buf; 4424 u64 *tx_handle_array; 4425 u64 *rx_handle_array; 4426 int num_tx_pools; 4427 int num_rx_pools; 4428 u64 *size_array; 4429 int i; 4430 4431 /* CHECK: Test/set of login_pending does not need to be atomic 4432 * because only ibmvnic_tasklet tests/clears this. 4433 */ 4434 if (!adapter->login_pending) { 4435 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4436 return 0; 4437 } 4438 adapter->login_pending = false; 4439 4440 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4441 DMA_TO_DEVICE); 4442 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4443 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4444 4445 /* If the number of queues requested can't be allocated by the 4446 * server, the login response will return with code 1. We will need 4447 * to resend the login buffer with fewer queues requested. 4448 */ 4449 if (login_rsp_crq->generic.rc.code) { 4450 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4451 complete(&adapter->init_done); 4452 return 0; 4453 } 4454 4455 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4456 4457 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4458 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4459 netdev_dbg(adapter->netdev, "%016lx\n", 4460 ((unsigned long *)(adapter->login_rsp_buf))[i]); 4461 } 4462 4463 /* Sanity checks */ 4464 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4465 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4466 adapter->req_rx_add_queues != 4467 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4468 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4469 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4470 return -EIO; 4471 } 4472 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4473 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4474 /* variable buffer sizes are not supported, so just read the 4475 * first entry. 4476 */ 4477 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4478 4479 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4480 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4481 4482 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4483 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4484 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4485 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4486 4487 for (i = 0; i < num_tx_pools; i++) 4488 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4489 4490 for (i = 0; i < num_rx_pools; i++) 4491 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4492 4493 adapter->num_active_tx_scrqs = num_tx_pools; 4494 adapter->num_active_rx_scrqs = num_rx_pools; 4495 release_login_rsp_buffer(adapter); 4496 release_login_buffer(adapter); 4497 complete(&adapter->init_done); 4498 4499 return 0; 4500 } 4501 4502 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4503 struct ibmvnic_adapter *adapter) 4504 { 4505 struct device *dev = &adapter->vdev->dev; 4506 long rc; 4507 4508 rc = crq->request_unmap_rsp.rc.code; 4509 if (rc) 4510 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4511 } 4512 4513 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4514 struct ibmvnic_adapter *adapter) 4515 { 4516 struct net_device *netdev = adapter->netdev; 4517 struct device *dev = &adapter->vdev->dev; 4518 long rc; 4519 4520 rc = crq->query_map_rsp.rc.code; 4521 if (rc) { 4522 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4523 return; 4524 } 4525 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4526 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4527 crq->query_map_rsp.free_pages); 4528 } 4529 4530 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4531 struct ibmvnic_adapter *adapter) 4532 { 4533 struct net_device *netdev = adapter->netdev; 4534 struct device *dev = &adapter->vdev->dev; 4535 long rc; 4536 4537 atomic_dec(&adapter->running_cap_crqs); 4538 netdev_dbg(netdev, "Outstanding queries: %d\n", 4539 atomic_read(&adapter->running_cap_crqs)); 4540 rc = crq->query_capability.rc.code; 4541 if (rc) { 4542 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4543 goto out; 4544 } 4545 4546 switch (be16_to_cpu(crq->query_capability.capability)) { 4547 case MIN_TX_QUEUES: 4548 adapter->min_tx_queues = 4549 be64_to_cpu(crq->query_capability.number); 4550 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4551 adapter->min_tx_queues); 4552 break; 4553 case MIN_RX_QUEUES: 4554 adapter->min_rx_queues = 4555 be64_to_cpu(crq->query_capability.number); 4556 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4557 adapter->min_rx_queues); 4558 break; 4559 case MIN_RX_ADD_QUEUES: 4560 adapter->min_rx_add_queues = 4561 be64_to_cpu(crq->query_capability.number); 4562 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4563 adapter->min_rx_add_queues); 4564 break; 4565 case MAX_TX_QUEUES: 4566 adapter->max_tx_queues = 4567 be64_to_cpu(crq->query_capability.number); 4568 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4569 adapter->max_tx_queues); 4570 break; 4571 case MAX_RX_QUEUES: 4572 adapter->max_rx_queues = 4573 be64_to_cpu(crq->query_capability.number); 4574 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4575 adapter->max_rx_queues); 4576 break; 4577 case MAX_RX_ADD_QUEUES: 4578 adapter->max_rx_add_queues = 4579 be64_to_cpu(crq->query_capability.number); 4580 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4581 adapter->max_rx_add_queues); 4582 break; 4583 case MIN_TX_ENTRIES_PER_SUBCRQ: 4584 adapter->min_tx_entries_per_subcrq = 4585 be64_to_cpu(crq->query_capability.number); 4586 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4587 adapter->min_tx_entries_per_subcrq); 4588 break; 4589 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4590 adapter->min_rx_add_entries_per_subcrq = 4591 be64_to_cpu(crq->query_capability.number); 4592 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4593 adapter->min_rx_add_entries_per_subcrq); 4594 break; 4595 case MAX_TX_ENTRIES_PER_SUBCRQ: 4596 adapter->max_tx_entries_per_subcrq = 4597 be64_to_cpu(crq->query_capability.number); 4598 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4599 adapter->max_tx_entries_per_subcrq); 4600 break; 4601 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4602 adapter->max_rx_add_entries_per_subcrq = 4603 be64_to_cpu(crq->query_capability.number); 4604 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4605 adapter->max_rx_add_entries_per_subcrq); 4606 break; 4607 case TCP_IP_OFFLOAD: 4608 adapter->tcp_ip_offload = 4609 be64_to_cpu(crq->query_capability.number); 4610 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4611 adapter->tcp_ip_offload); 4612 break; 4613 case PROMISC_SUPPORTED: 4614 adapter->promisc_supported = 4615 be64_to_cpu(crq->query_capability.number); 4616 netdev_dbg(netdev, "promisc_supported = %lld\n", 4617 adapter->promisc_supported); 4618 break; 4619 case MIN_MTU: 4620 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4621 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4622 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4623 break; 4624 case MAX_MTU: 4625 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4626 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4627 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4628 break; 4629 case MAX_MULTICAST_FILTERS: 4630 adapter->max_multicast_filters = 4631 be64_to_cpu(crq->query_capability.number); 4632 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4633 adapter->max_multicast_filters); 4634 break; 4635 case VLAN_HEADER_INSERTION: 4636 adapter->vlan_header_insertion = 4637 be64_to_cpu(crq->query_capability.number); 4638 if (adapter->vlan_header_insertion) 4639 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4640 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4641 adapter->vlan_header_insertion); 4642 break; 4643 case RX_VLAN_HEADER_INSERTION: 4644 adapter->rx_vlan_header_insertion = 4645 be64_to_cpu(crq->query_capability.number); 4646 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4647 adapter->rx_vlan_header_insertion); 4648 break; 4649 case MAX_TX_SG_ENTRIES: 4650 adapter->max_tx_sg_entries = 4651 be64_to_cpu(crq->query_capability.number); 4652 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4653 adapter->max_tx_sg_entries); 4654 break; 4655 case RX_SG_SUPPORTED: 4656 adapter->rx_sg_supported = 4657 be64_to_cpu(crq->query_capability.number); 4658 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4659 adapter->rx_sg_supported); 4660 break; 4661 case OPT_TX_COMP_SUB_QUEUES: 4662 adapter->opt_tx_comp_sub_queues = 4663 be64_to_cpu(crq->query_capability.number); 4664 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4665 adapter->opt_tx_comp_sub_queues); 4666 break; 4667 case OPT_RX_COMP_QUEUES: 4668 adapter->opt_rx_comp_queues = 4669 be64_to_cpu(crq->query_capability.number); 4670 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4671 adapter->opt_rx_comp_queues); 4672 break; 4673 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4674 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4675 be64_to_cpu(crq->query_capability.number); 4676 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4677 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4678 break; 4679 case OPT_TX_ENTRIES_PER_SUBCRQ: 4680 adapter->opt_tx_entries_per_subcrq = 4681 be64_to_cpu(crq->query_capability.number); 4682 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4683 adapter->opt_tx_entries_per_subcrq); 4684 break; 4685 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4686 adapter->opt_rxba_entries_per_subcrq = 4687 be64_to_cpu(crq->query_capability.number); 4688 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4689 adapter->opt_rxba_entries_per_subcrq); 4690 break; 4691 case TX_RX_DESC_REQ: 4692 adapter->tx_rx_desc_req = crq->query_capability.number; 4693 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4694 adapter->tx_rx_desc_req); 4695 break; 4696 4697 default: 4698 netdev_err(netdev, "Got invalid cap rsp %d\n", 4699 crq->query_capability.capability); 4700 } 4701 4702 out: 4703 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4704 adapter->wait_capability = false; 4705 send_request_cap(adapter, 0); 4706 } 4707 } 4708 4709 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4710 { 4711 union ibmvnic_crq crq; 4712 int rc; 4713 4714 memset(&crq, 0, sizeof(crq)); 4715 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4716 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4717 4718 mutex_lock(&adapter->fw_lock); 4719 adapter->fw_done_rc = 0; 4720 reinit_completion(&adapter->fw_done); 4721 4722 rc = ibmvnic_send_crq(adapter, &crq); 4723 if (rc) { 4724 mutex_unlock(&adapter->fw_lock); 4725 return rc; 4726 } 4727 4728 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4729 if (rc) { 4730 mutex_unlock(&adapter->fw_lock); 4731 return rc; 4732 } 4733 4734 mutex_unlock(&adapter->fw_lock); 4735 return adapter->fw_done_rc ? -EIO : 0; 4736 } 4737 4738 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4739 struct ibmvnic_adapter *adapter) 4740 { 4741 struct net_device *netdev = adapter->netdev; 4742 int rc; 4743 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4744 4745 rc = crq->query_phys_parms_rsp.rc.code; 4746 if (rc) { 4747 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4748 return rc; 4749 } 4750 switch (rspeed) { 4751 case IBMVNIC_10MBPS: 4752 adapter->speed = SPEED_10; 4753 break; 4754 case IBMVNIC_100MBPS: 4755 adapter->speed = SPEED_100; 4756 break; 4757 case IBMVNIC_1GBPS: 4758 adapter->speed = SPEED_1000; 4759 break; 4760 case IBMVNIC_10GBPS: 4761 adapter->speed = SPEED_10000; 4762 break; 4763 case IBMVNIC_25GBPS: 4764 adapter->speed = SPEED_25000; 4765 break; 4766 case IBMVNIC_40GBPS: 4767 adapter->speed = SPEED_40000; 4768 break; 4769 case IBMVNIC_50GBPS: 4770 adapter->speed = SPEED_50000; 4771 break; 4772 case IBMVNIC_100GBPS: 4773 adapter->speed = SPEED_100000; 4774 break; 4775 case IBMVNIC_200GBPS: 4776 adapter->speed = SPEED_200000; 4777 break; 4778 default: 4779 if (netif_carrier_ok(netdev)) 4780 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4781 adapter->speed = SPEED_UNKNOWN; 4782 } 4783 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4784 adapter->duplex = DUPLEX_FULL; 4785 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4786 adapter->duplex = DUPLEX_HALF; 4787 else 4788 adapter->duplex = DUPLEX_UNKNOWN; 4789 4790 return rc; 4791 } 4792 4793 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4794 struct ibmvnic_adapter *adapter) 4795 { 4796 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4797 struct net_device *netdev = adapter->netdev; 4798 struct device *dev = &adapter->vdev->dev; 4799 u64 *u64_crq = (u64 *)crq; 4800 long rc; 4801 4802 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4803 (unsigned long)cpu_to_be64(u64_crq[0]), 4804 (unsigned long)cpu_to_be64(u64_crq[1])); 4805 switch (gen_crq->first) { 4806 case IBMVNIC_CRQ_INIT_RSP: 4807 switch (gen_crq->cmd) { 4808 case IBMVNIC_CRQ_INIT: 4809 dev_info(dev, "Partner initialized\n"); 4810 adapter->from_passive_init = true; 4811 /* Discard any stale login responses from prev reset. 4812 * CHECK: should we clear even on INIT_COMPLETE? 4813 */ 4814 adapter->login_pending = false; 4815 4816 if (!completion_done(&adapter->init_done)) { 4817 complete(&adapter->init_done); 4818 adapter->init_done_rc = -EIO; 4819 } 4820 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4821 if (rc && rc != -EBUSY) { 4822 /* We were unable to schedule the failover 4823 * reset either because the adapter was still 4824 * probing (eg: during kexec) or we could not 4825 * allocate memory. Clear the failover_pending 4826 * flag since no one else will. We ignore 4827 * EBUSY because it means either FAILOVER reset 4828 * is already scheduled or the adapter is 4829 * being removed. 4830 */ 4831 netdev_err(netdev, 4832 "Error %ld scheduling failover reset\n", 4833 rc); 4834 adapter->failover_pending = false; 4835 } 4836 break; 4837 case IBMVNIC_CRQ_INIT_COMPLETE: 4838 dev_info(dev, "Partner initialization complete\n"); 4839 adapter->crq.active = true; 4840 send_version_xchg(adapter); 4841 break; 4842 default: 4843 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4844 } 4845 return; 4846 case IBMVNIC_CRQ_XPORT_EVENT: 4847 netif_carrier_off(netdev); 4848 adapter->crq.active = false; 4849 /* terminate any thread waiting for a response 4850 * from the device 4851 */ 4852 if (!completion_done(&adapter->fw_done)) { 4853 adapter->fw_done_rc = -EIO; 4854 complete(&adapter->fw_done); 4855 } 4856 if (!completion_done(&adapter->stats_done)) 4857 complete(&adapter->stats_done); 4858 if (test_bit(0, &adapter->resetting)) 4859 adapter->force_reset_recovery = true; 4860 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4861 dev_info(dev, "Migrated, re-enabling adapter\n"); 4862 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4863 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4864 dev_info(dev, "Backing device failover detected\n"); 4865 adapter->failover_pending = true; 4866 } else { 4867 /* The adapter lost the connection */ 4868 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4869 gen_crq->cmd); 4870 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4871 } 4872 return; 4873 case IBMVNIC_CRQ_CMD_RSP: 4874 break; 4875 default: 4876 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4877 gen_crq->first); 4878 return; 4879 } 4880 4881 switch (gen_crq->cmd) { 4882 case VERSION_EXCHANGE_RSP: 4883 rc = crq->version_exchange_rsp.rc.code; 4884 if (rc) { 4885 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4886 break; 4887 } 4888 ibmvnic_version = 4889 be16_to_cpu(crq->version_exchange_rsp.version); 4890 dev_info(dev, "Partner protocol version is %d\n", 4891 ibmvnic_version); 4892 send_query_cap(adapter); 4893 break; 4894 case QUERY_CAPABILITY_RSP: 4895 handle_query_cap_rsp(crq, adapter); 4896 break; 4897 case QUERY_MAP_RSP: 4898 handle_query_map_rsp(crq, adapter); 4899 break; 4900 case REQUEST_MAP_RSP: 4901 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4902 complete(&adapter->fw_done); 4903 break; 4904 case REQUEST_UNMAP_RSP: 4905 handle_request_unmap_rsp(crq, adapter); 4906 break; 4907 case REQUEST_CAPABILITY_RSP: 4908 handle_request_cap_rsp(crq, adapter); 4909 break; 4910 case LOGIN_RSP: 4911 netdev_dbg(netdev, "Got Login Response\n"); 4912 handle_login_rsp(crq, adapter); 4913 break; 4914 case LOGICAL_LINK_STATE_RSP: 4915 netdev_dbg(netdev, 4916 "Got Logical Link State Response, state: %d rc: %d\n", 4917 crq->logical_link_state_rsp.link_state, 4918 crq->logical_link_state_rsp.rc.code); 4919 adapter->logical_link_state = 4920 crq->logical_link_state_rsp.link_state; 4921 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4922 complete(&adapter->init_done); 4923 break; 4924 case LINK_STATE_INDICATION: 4925 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4926 adapter->phys_link_state = 4927 crq->link_state_indication.phys_link_state; 4928 adapter->logical_link_state = 4929 crq->link_state_indication.logical_link_state; 4930 if (adapter->phys_link_state && adapter->logical_link_state) 4931 netif_carrier_on(netdev); 4932 else 4933 netif_carrier_off(netdev); 4934 break; 4935 case CHANGE_MAC_ADDR_RSP: 4936 netdev_dbg(netdev, "Got MAC address change Response\n"); 4937 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4938 break; 4939 case ERROR_INDICATION: 4940 netdev_dbg(netdev, "Got Error Indication\n"); 4941 handle_error_indication(crq, adapter); 4942 break; 4943 case REQUEST_STATISTICS_RSP: 4944 netdev_dbg(netdev, "Got Statistics Response\n"); 4945 complete(&adapter->stats_done); 4946 break; 4947 case QUERY_IP_OFFLOAD_RSP: 4948 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4949 handle_query_ip_offload_rsp(adapter); 4950 break; 4951 case MULTICAST_CTRL_RSP: 4952 netdev_dbg(netdev, "Got multicast control Response\n"); 4953 break; 4954 case CONTROL_IP_OFFLOAD_RSP: 4955 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4956 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4957 sizeof(adapter->ip_offload_ctrl), 4958 DMA_TO_DEVICE); 4959 complete(&adapter->init_done); 4960 break; 4961 case COLLECT_FW_TRACE_RSP: 4962 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4963 complete(&adapter->fw_done); 4964 break; 4965 case GET_VPD_SIZE_RSP: 4966 handle_vpd_size_rsp(crq, adapter); 4967 break; 4968 case GET_VPD_RSP: 4969 handle_vpd_rsp(crq, adapter); 4970 break; 4971 case QUERY_PHYS_PARMS_RSP: 4972 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4973 complete(&adapter->fw_done); 4974 break; 4975 default: 4976 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4977 gen_crq->cmd); 4978 } 4979 } 4980 4981 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4982 { 4983 struct ibmvnic_adapter *adapter = instance; 4984 4985 tasklet_schedule(&adapter->tasklet); 4986 return IRQ_HANDLED; 4987 } 4988 4989 static void ibmvnic_tasklet(struct tasklet_struct *t) 4990 { 4991 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 4992 struct ibmvnic_crq_queue *queue = &adapter->crq; 4993 union ibmvnic_crq *crq; 4994 unsigned long flags; 4995 bool done = false; 4996 4997 spin_lock_irqsave(&queue->lock, flags); 4998 while (!done) { 4999 /* Pull all the valid messages off the CRQ */ 5000 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5001 /* This barrier makes sure ibmvnic_next_crq()'s 5002 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 5003 * before ibmvnic_handle_crq()'s 5004 * switch(gen_crq->first) and switch(gen_crq->cmd). 5005 */ 5006 dma_rmb(); 5007 ibmvnic_handle_crq(crq, adapter); 5008 crq->generic.first = 0; 5009 } 5010 5011 /* remain in tasklet until all 5012 * capabilities responses are received 5013 */ 5014 if (!adapter->wait_capability) 5015 done = true; 5016 } 5017 /* if capabilities CRQ's were sent in this tasklet, the following 5018 * tasklet must wait until all responses are received 5019 */ 5020 if (atomic_read(&adapter->running_cap_crqs) != 0) 5021 adapter->wait_capability = true; 5022 spin_unlock_irqrestore(&queue->lock, flags); 5023 } 5024 5025 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5026 { 5027 struct vio_dev *vdev = adapter->vdev; 5028 int rc; 5029 5030 do { 5031 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5032 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5033 5034 if (rc) 5035 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5036 5037 return rc; 5038 } 5039 5040 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5041 { 5042 struct ibmvnic_crq_queue *crq = &adapter->crq; 5043 struct device *dev = &adapter->vdev->dev; 5044 struct vio_dev *vdev = adapter->vdev; 5045 int rc; 5046 5047 /* Close the CRQ */ 5048 do { 5049 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5050 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5051 5052 /* Clean out the queue */ 5053 if (!crq->msgs) 5054 return -EINVAL; 5055 5056 memset(crq->msgs, 0, PAGE_SIZE); 5057 crq->cur = 0; 5058 crq->active = false; 5059 5060 /* And re-open it again */ 5061 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5062 crq->msg_token, PAGE_SIZE); 5063 5064 if (rc == H_CLOSED) 5065 /* Adapter is good, but other end is not ready */ 5066 dev_warn(dev, "Partner adapter not ready\n"); 5067 else if (rc != 0) 5068 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5069 5070 return rc; 5071 } 5072 5073 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5074 { 5075 struct ibmvnic_crq_queue *crq = &adapter->crq; 5076 struct vio_dev *vdev = adapter->vdev; 5077 long rc; 5078 5079 if (!crq->msgs) 5080 return; 5081 5082 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5083 free_irq(vdev->irq, adapter); 5084 tasklet_kill(&adapter->tasklet); 5085 do { 5086 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5087 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5088 5089 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5090 DMA_BIDIRECTIONAL); 5091 free_page((unsigned long)crq->msgs); 5092 crq->msgs = NULL; 5093 crq->active = false; 5094 } 5095 5096 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5097 { 5098 struct ibmvnic_crq_queue *crq = &adapter->crq; 5099 struct device *dev = &adapter->vdev->dev; 5100 struct vio_dev *vdev = adapter->vdev; 5101 int rc, retrc = -ENOMEM; 5102 5103 if (crq->msgs) 5104 return 0; 5105 5106 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5107 /* Should we allocate more than one page? */ 5108 5109 if (!crq->msgs) 5110 return -ENOMEM; 5111 5112 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5113 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5114 DMA_BIDIRECTIONAL); 5115 if (dma_mapping_error(dev, crq->msg_token)) 5116 goto map_failed; 5117 5118 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5119 crq->msg_token, PAGE_SIZE); 5120 5121 if (rc == H_RESOURCE) 5122 /* maybe kexecing and resource is busy. try a reset */ 5123 rc = ibmvnic_reset_crq(adapter); 5124 retrc = rc; 5125 5126 if (rc == H_CLOSED) { 5127 dev_warn(dev, "Partner adapter not ready\n"); 5128 } else if (rc) { 5129 dev_warn(dev, "Error %d opening adapter\n", rc); 5130 goto reg_crq_failed; 5131 } 5132 5133 retrc = 0; 5134 5135 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5136 5137 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5138 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5139 adapter->vdev->unit_address); 5140 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5141 if (rc) { 5142 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5143 vdev->irq, rc); 5144 goto req_irq_failed; 5145 } 5146 5147 rc = vio_enable_interrupts(vdev); 5148 if (rc) { 5149 dev_err(dev, "Error %d enabling interrupts\n", rc); 5150 goto req_irq_failed; 5151 } 5152 5153 crq->cur = 0; 5154 spin_lock_init(&crq->lock); 5155 5156 return retrc; 5157 5158 req_irq_failed: 5159 tasklet_kill(&adapter->tasklet); 5160 do { 5161 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5162 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5163 reg_crq_failed: 5164 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5165 map_failed: 5166 free_page((unsigned long)crq->msgs); 5167 crq->msgs = NULL; 5168 return retrc; 5169 } 5170 5171 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5172 { 5173 struct device *dev = &adapter->vdev->dev; 5174 unsigned long timeout = msecs_to_jiffies(20000); 5175 u64 old_num_rx_queues, old_num_tx_queues; 5176 int rc; 5177 5178 adapter->from_passive_init = false; 5179 5180 if (reset) { 5181 old_num_rx_queues = adapter->req_rx_queues; 5182 old_num_tx_queues = adapter->req_tx_queues; 5183 reinit_completion(&adapter->init_done); 5184 } 5185 5186 adapter->init_done_rc = 0; 5187 rc = ibmvnic_send_crq_init(adapter); 5188 if (rc) { 5189 dev_err(dev, "Send crq init failed with error %d\n", rc); 5190 return rc; 5191 } 5192 5193 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5194 dev_err(dev, "Initialization sequence timed out\n"); 5195 return -1; 5196 } 5197 5198 if (adapter->init_done_rc) { 5199 release_crq_queue(adapter); 5200 return adapter->init_done_rc; 5201 } 5202 5203 if (adapter->from_passive_init) { 5204 adapter->state = VNIC_OPEN; 5205 adapter->from_passive_init = false; 5206 return -1; 5207 } 5208 5209 if (reset && 5210 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5211 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5212 if (adapter->req_rx_queues != old_num_rx_queues || 5213 adapter->req_tx_queues != old_num_tx_queues) { 5214 release_sub_crqs(adapter, 0); 5215 rc = init_sub_crqs(adapter); 5216 } else { 5217 rc = reset_sub_crq_queues(adapter); 5218 } 5219 } else { 5220 rc = init_sub_crqs(adapter); 5221 } 5222 5223 if (rc) { 5224 dev_err(dev, "Initialization of sub crqs failed\n"); 5225 release_crq_queue(adapter); 5226 return rc; 5227 } 5228 5229 rc = init_sub_crq_irqs(adapter); 5230 if (rc) { 5231 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5232 release_crq_queue(adapter); 5233 } 5234 5235 return rc; 5236 } 5237 5238 static struct device_attribute dev_attr_failover; 5239 5240 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5241 { 5242 struct ibmvnic_adapter *adapter; 5243 struct net_device *netdev; 5244 unsigned char *mac_addr_p; 5245 int rc; 5246 5247 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5248 dev->unit_address); 5249 5250 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5251 VETH_MAC_ADDR, NULL); 5252 if (!mac_addr_p) { 5253 dev_err(&dev->dev, 5254 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5255 __FILE__, __LINE__); 5256 return 0; 5257 } 5258 5259 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5260 IBMVNIC_MAX_QUEUES); 5261 if (!netdev) 5262 return -ENOMEM; 5263 5264 adapter = netdev_priv(netdev); 5265 adapter->state = VNIC_PROBING; 5266 dev_set_drvdata(&dev->dev, netdev); 5267 adapter->vdev = dev; 5268 adapter->netdev = netdev; 5269 adapter->login_pending = false; 5270 5271 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5272 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5273 netdev->irq = dev->irq; 5274 netdev->netdev_ops = &ibmvnic_netdev_ops; 5275 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5276 SET_NETDEV_DEV(netdev, &dev->dev); 5277 5278 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5279 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5280 __ibmvnic_delayed_reset); 5281 INIT_LIST_HEAD(&adapter->rwi_list); 5282 spin_lock_init(&adapter->rwi_lock); 5283 spin_lock_init(&adapter->state_lock); 5284 mutex_init(&adapter->fw_lock); 5285 init_completion(&adapter->init_done); 5286 init_completion(&adapter->fw_done); 5287 init_completion(&adapter->reset_done); 5288 init_completion(&adapter->stats_done); 5289 clear_bit(0, &adapter->resetting); 5290 5291 do { 5292 rc = init_crq_queue(adapter); 5293 if (rc) { 5294 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5295 rc); 5296 goto ibmvnic_init_fail; 5297 } 5298 5299 rc = ibmvnic_reset_init(adapter, false); 5300 if (rc && rc != EAGAIN) 5301 goto ibmvnic_init_fail; 5302 } while (rc == EAGAIN); 5303 5304 rc = init_stats_buffers(adapter); 5305 if (rc) 5306 goto ibmvnic_init_fail; 5307 5308 rc = init_stats_token(adapter); 5309 if (rc) 5310 goto ibmvnic_stats_fail; 5311 5312 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5313 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5314 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5315 5316 rc = device_create_file(&dev->dev, &dev_attr_failover); 5317 if (rc) 5318 goto ibmvnic_dev_file_err; 5319 5320 netif_carrier_off(netdev); 5321 rc = register_netdev(netdev); 5322 if (rc) { 5323 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5324 goto ibmvnic_register_fail; 5325 } 5326 dev_info(&dev->dev, "ibmvnic registered\n"); 5327 5328 adapter->state = VNIC_PROBED; 5329 5330 adapter->wait_for_reset = false; 5331 adapter->last_reset_time = jiffies; 5332 return 0; 5333 5334 ibmvnic_register_fail: 5335 device_remove_file(&dev->dev, &dev_attr_failover); 5336 5337 ibmvnic_dev_file_err: 5338 release_stats_token(adapter); 5339 5340 ibmvnic_stats_fail: 5341 release_stats_buffers(adapter); 5342 5343 ibmvnic_init_fail: 5344 release_sub_crqs(adapter, 1); 5345 release_crq_queue(adapter); 5346 mutex_destroy(&adapter->fw_lock); 5347 free_netdev(netdev); 5348 5349 return rc; 5350 } 5351 5352 static int ibmvnic_remove(struct vio_dev *dev) 5353 { 5354 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5355 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5356 unsigned long flags; 5357 5358 spin_lock_irqsave(&adapter->state_lock, flags); 5359 5360 /* If ibmvnic_reset() is scheduling a reset, wait for it to 5361 * finish. Then, set the state to REMOVING to prevent it from 5362 * scheduling any more work and to have reset functions ignore 5363 * any resets that have already been scheduled. Drop the lock 5364 * after setting state, so __ibmvnic_reset() which is called 5365 * from the flush_work() below, can make progress. 5366 */ 5367 spin_lock_irqsave(&adapter->rwi_lock, flags); 5368 adapter->state = VNIC_REMOVING; 5369 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 5370 5371 spin_unlock_irqrestore(&adapter->state_lock, flags); 5372 5373 flush_work(&adapter->ibmvnic_reset); 5374 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5375 5376 rtnl_lock(); 5377 unregister_netdevice(netdev); 5378 5379 release_resources(adapter); 5380 release_sub_crqs(adapter, 1); 5381 release_crq_queue(adapter); 5382 5383 release_stats_token(adapter); 5384 release_stats_buffers(adapter); 5385 5386 adapter->state = VNIC_REMOVED; 5387 5388 rtnl_unlock(); 5389 mutex_destroy(&adapter->fw_lock); 5390 device_remove_file(&dev->dev, &dev_attr_failover); 5391 free_netdev(netdev); 5392 dev_set_drvdata(&dev->dev, NULL); 5393 5394 return 0; 5395 } 5396 5397 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5398 const char *buf, size_t count) 5399 { 5400 struct net_device *netdev = dev_get_drvdata(dev); 5401 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5402 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5403 __be64 session_token; 5404 long rc; 5405 5406 if (!sysfs_streq(buf, "1")) 5407 return -EINVAL; 5408 5409 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5410 H_GET_SESSION_TOKEN, 0, 0, 0); 5411 if (rc) { 5412 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5413 rc); 5414 return -EINVAL; 5415 } 5416 5417 session_token = (__be64)retbuf[0]; 5418 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5419 be64_to_cpu(session_token)); 5420 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5421 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5422 if (rc) { 5423 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5424 rc); 5425 return -EINVAL; 5426 } 5427 5428 return count; 5429 } 5430 5431 static DEVICE_ATTR_WO(failover); 5432 5433 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5434 { 5435 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5436 struct ibmvnic_adapter *adapter; 5437 struct iommu_table *tbl; 5438 unsigned long ret = 0; 5439 int i; 5440 5441 tbl = get_iommu_table_base(&vdev->dev); 5442 5443 /* netdev inits at probe time along with the structures we need below*/ 5444 if (!netdev) 5445 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5446 5447 adapter = netdev_priv(netdev); 5448 5449 ret += PAGE_SIZE; /* the crq message queue */ 5450 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5451 5452 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5453 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5454 5455 for (i = 0; i < adapter->num_active_rx_pools; i++) 5456 ret += adapter->rx_pool[i].size * 5457 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5458 5459 return ret; 5460 } 5461 5462 static int ibmvnic_resume(struct device *dev) 5463 { 5464 struct net_device *netdev = dev_get_drvdata(dev); 5465 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5466 5467 if (adapter->state != VNIC_OPEN) 5468 return 0; 5469 5470 tasklet_schedule(&adapter->tasklet); 5471 5472 return 0; 5473 } 5474 5475 static const struct vio_device_id ibmvnic_device_table[] = { 5476 {"network", "IBM,vnic"}, 5477 {"", "" } 5478 }; 5479 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5480 5481 static const struct dev_pm_ops ibmvnic_pm_ops = { 5482 .resume = ibmvnic_resume 5483 }; 5484 5485 static struct vio_driver ibmvnic_driver = { 5486 .id_table = ibmvnic_device_table, 5487 .probe = ibmvnic_probe, 5488 .remove = ibmvnic_remove, 5489 .get_desired_dma = ibmvnic_get_desired_dma, 5490 .name = ibmvnic_driver_name, 5491 .pm = &ibmvnic_pm_ops, 5492 }; 5493 5494 /* module functions */ 5495 static int __init ibmvnic_module_init(void) 5496 { 5497 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5498 IBMVNIC_DRIVER_VERSION); 5499 5500 return vio_register_driver(&ibmvnic_driver); 5501 } 5502 5503 static void __exit ibmvnic_module_exit(void) 5504 { 5505 vio_unregister_driver(&ibmvnic_driver); 5506 } 5507 5508 module_init(ibmvnic_module_init); 5509 module_exit(ibmvnic_module_exit); 5510