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 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 251 adapter->reset_reason != VNIC_RESET_MOBILITY) 252 send_request_unmap(adapter, ltb->map_id); 253 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 254 } 255 256 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 257 struct ibmvnic_long_term_buff *ltb) 258 { 259 struct device *dev = &adapter->vdev->dev; 260 int rc; 261 262 memset(ltb->buff, 0, ltb->size); 263 264 mutex_lock(&adapter->fw_lock); 265 adapter->fw_done_rc = 0; 266 267 reinit_completion(&adapter->fw_done); 268 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 269 if (rc) { 270 mutex_unlock(&adapter->fw_lock); 271 return rc; 272 } 273 274 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 275 if (rc) { 276 dev_info(dev, 277 "Reset failed, long term map request timed out or aborted\n"); 278 mutex_unlock(&adapter->fw_lock); 279 return rc; 280 } 281 282 if (adapter->fw_done_rc) { 283 dev_info(dev, 284 "Reset failed, attempting to free and reallocate buffer\n"); 285 free_long_term_buff(adapter, ltb); 286 mutex_unlock(&adapter->fw_lock); 287 return alloc_long_term_buff(adapter, ltb, ltb->size); 288 } 289 mutex_unlock(&adapter->fw_lock); 290 return 0; 291 } 292 293 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 294 { 295 int i; 296 297 for (i = 0; i < adapter->num_active_rx_pools; i++) 298 adapter->rx_pool[i].active = 0; 299 } 300 301 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 302 struct ibmvnic_rx_pool *pool) 303 { 304 int count = pool->size - atomic_read(&pool->available); 305 u64 handle = adapter->rx_scrq[pool->index]->handle; 306 struct device *dev = &adapter->vdev->dev; 307 struct ibmvnic_ind_xmit_queue *ind_bufp; 308 struct ibmvnic_sub_crq_queue *rx_scrq; 309 union sub_crq *sub_crq; 310 int buffers_added = 0; 311 unsigned long lpar_rc; 312 struct sk_buff *skb; 313 unsigned int offset; 314 dma_addr_t dma_addr; 315 unsigned char *dst; 316 int shift = 0; 317 int index; 318 int i; 319 320 if (!pool->active) 321 return; 322 323 rx_scrq = adapter->rx_scrq[pool->index]; 324 ind_bufp = &rx_scrq->ind_buf; 325 for (i = 0; i < count; ++i) { 326 skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); 327 if (!skb) { 328 dev_err(dev, "Couldn't replenish rx buff\n"); 329 adapter->replenish_no_mem++; 330 break; 331 } 332 333 index = pool->free_map[pool->next_free]; 334 335 if (pool->rx_buff[index].skb) 336 dev_err(dev, "Inconsistent free_map!\n"); 337 338 /* Copy the skb to the long term mapped DMA buffer */ 339 offset = index * pool->buff_size; 340 dst = pool->long_term_buff.buff + offset; 341 memset(dst, 0, pool->buff_size); 342 dma_addr = pool->long_term_buff.addr + offset; 343 pool->rx_buff[index].data = dst; 344 345 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 346 pool->rx_buff[index].dma = dma_addr; 347 pool->rx_buff[index].skb = skb; 348 pool->rx_buff[index].pool_index = pool->index; 349 pool->rx_buff[index].size = pool->buff_size; 350 351 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 352 memset(sub_crq, 0, sizeof(*sub_crq)); 353 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 354 sub_crq->rx_add.correlator = 355 cpu_to_be64((u64)&pool->rx_buff[index]); 356 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 357 sub_crq->rx_add.map_id = pool->long_term_buff.map_id; 358 359 /* The length field of the sCRQ is defined to be 24 bits so the 360 * buffer size needs to be left shifted by a byte before it is 361 * converted to big endian to prevent the last byte from being 362 * truncated. 363 */ 364 #ifdef __LITTLE_ENDIAN__ 365 shift = 8; 366 #endif 367 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 368 pool->next_free = (pool->next_free + 1) % pool->size; 369 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 370 i == count - 1) { 371 lpar_rc = 372 send_subcrq_indirect(adapter, handle, 373 (u64)ind_bufp->indir_dma, 374 (u64)ind_bufp->index); 375 if (lpar_rc != H_SUCCESS) 376 goto failure; 377 buffers_added += ind_bufp->index; 378 adapter->replenish_add_buff_success += ind_bufp->index; 379 ind_bufp->index = 0; 380 } 381 } 382 atomic_add(buffers_added, &pool->available); 383 return; 384 385 failure: 386 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 387 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 388 for (i = ind_bufp->index - 1; i >= 0; --i) { 389 struct ibmvnic_rx_buff *rx_buff; 390 391 pool->next_free = pool->next_free == 0 ? 392 pool->size - 1 : pool->next_free - 1; 393 sub_crq = &ind_bufp->indir_arr[i]; 394 rx_buff = (struct ibmvnic_rx_buff *) 395 be64_to_cpu(sub_crq->rx_add.correlator); 396 index = (int)(rx_buff - pool->rx_buff); 397 pool->free_map[pool->next_free] = index; 398 dev_kfree_skb_any(pool->rx_buff[index].skb); 399 pool->rx_buff[index].skb = NULL; 400 } 401 ind_bufp->index = 0; 402 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 403 /* Disable buffer pool replenishment and report carrier off if 404 * queue is closed or pending failover. 405 * Firmware guarantees that a signal will be sent to the 406 * driver, triggering a reset. 407 */ 408 deactivate_rx_pools(adapter); 409 netif_carrier_off(adapter->netdev); 410 } 411 } 412 413 static void replenish_pools(struct ibmvnic_adapter *adapter) 414 { 415 int i; 416 417 adapter->replenish_task_cycles++; 418 for (i = 0; i < adapter->num_active_rx_pools; i++) { 419 if (adapter->rx_pool[i].active) 420 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 421 } 422 } 423 424 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 425 { 426 kfree(adapter->tx_stats_buffers); 427 kfree(adapter->rx_stats_buffers); 428 adapter->tx_stats_buffers = NULL; 429 adapter->rx_stats_buffers = NULL; 430 } 431 432 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 433 { 434 adapter->tx_stats_buffers = 435 kcalloc(IBMVNIC_MAX_QUEUES, 436 sizeof(struct ibmvnic_tx_queue_stats), 437 GFP_KERNEL); 438 if (!adapter->tx_stats_buffers) 439 return -ENOMEM; 440 441 adapter->rx_stats_buffers = 442 kcalloc(IBMVNIC_MAX_QUEUES, 443 sizeof(struct ibmvnic_rx_queue_stats), 444 GFP_KERNEL); 445 if (!adapter->rx_stats_buffers) 446 return -ENOMEM; 447 448 return 0; 449 } 450 451 static void release_stats_token(struct ibmvnic_adapter *adapter) 452 { 453 struct device *dev = &adapter->vdev->dev; 454 455 if (!adapter->stats_token) 456 return; 457 458 dma_unmap_single(dev, adapter->stats_token, 459 sizeof(struct ibmvnic_statistics), 460 DMA_FROM_DEVICE); 461 adapter->stats_token = 0; 462 } 463 464 static int init_stats_token(struct ibmvnic_adapter *adapter) 465 { 466 struct device *dev = &adapter->vdev->dev; 467 dma_addr_t stok; 468 469 stok = dma_map_single(dev, &adapter->stats, 470 sizeof(struct ibmvnic_statistics), 471 DMA_FROM_DEVICE); 472 if (dma_mapping_error(dev, stok)) { 473 dev_err(dev, "Couldn't map stats buffer\n"); 474 return -1; 475 } 476 477 adapter->stats_token = stok; 478 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 479 return 0; 480 } 481 482 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 483 { 484 struct ibmvnic_rx_pool *rx_pool; 485 u64 buff_size; 486 int rx_scrqs; 487 int i, j, rc; 488 489 if (!adapter->rx_pool) 490 return -1; 491 492 buff_size = adapter->cur_rx_buf_sz; 493 rx_scrqs = adapter->num_active_rx_pools; 494 for (i = 0; i < rx_scrqs; i++) { 495 rx_pool = &adapter->rx_pool[i]; 496 497 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 498 499 if (rx_pool->buff_size != buff_size) { 500 free_long_term_buff(adapter, &rx_pool->long_term_buff); 501 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 502 rc = alloc_long_term_buff(adapter, 503 &rx_pool->long_term_buff, 504 rx_pool->size * 505 rx_pool->buff_size); 506 } else { 507 rc = reset_long_term_buff(adapter, 508 &rx_pool->long_term_buff); 509 } 510 511 if (rc) 512 return rc; 513 514 for (j = 0; j < rx_pool->size; j++) 515 rx_pool->free_map[j] = j; 516 517 memset(rx_pool->rx_buff, 0, 518 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 519 520 atomic_set(&rx_pool->available, 0); 521 rx_pool->next_alloc = 0; 522 rx_pool->next_free = 0; 523 rx_pool->active = 1; 524 } 525 526 return 0; 527 } 528 529 static void release_rx_pools(struct ibmvnic_adapter *adapter) 530 { 531 struct ibmvnic_rx_pool *rx_pool; 532 int i, j; 533 534 if (!adapter->rx_pool) 535 return; 536 537 for (i = 0; i < adapter->num_active_rx_pools; i++) { 538 rx_pool = &adapter->rx_pool[i]; 539 540 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 541 542 kfree(rx_pool->free_map); 543 free_long_term_buff(adapter, &rx_pool->long_term_buff); 544 545 if (!rx_pool->rx_buff) 546 continue; 547 548 for (j = 0; j < rx_pool->size; j++) { 549 if (rx_pool->rx_buff[j].skb) { 550 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 551 rx_pool->rx_buff[j].skb = NULL; 552 } 553 } 554 555 kfree(rx_pool->rx_buff); 556 } 557 558 kfree(adapter->rx_pool); 559 adapter->rx_pool = NULL; 560 adapter->num_active_rx_pools = 0; 561 } 562 563 static int init_rx_pools(struct net_device *netdev) 564 { 565 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 566 struct device *dev = &adapter->vdev->dev; 567 struct ibmvnic_rx_pool *rx_pool; 568 int rxadd_subcrqs; 569 u64 buff_size; 570 int i, j; 571 572 rxadd_subcrqs = adapter->num_active_rx_scrqs; 573 buff_size = adapter->cur_rx_buf_sz; 574 575 adapter->rx_pool = kcalloc(rxadd_subcrqs, 576 sizeof(struct ibmvnic_rx_pool), 577 GFP_KERNEL); 578 if (!adapter->rx_pool) { 579 dev_err(dev, "Failed to allocate rx pools\n"); 580 return -1; 581 } 582 583 adapter->num_active_rx_pools = rxadd_subcrqs; 584 585 for (i = 0; i < rxadd_subcrqs; i++) { 586 rx_pool = &adapter->rx_pool[i]; 587 588 netdev_dbg(adapter->netdev, 589 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 590 i, adapter->req_rx_add_entries_per_subcrq, 591 buff_size); 592 593 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 594 rx_pool->index = i; 595 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 596 rx_pool->active = 1; 597 598 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 599 GFP_KERNEL); 600 if (!rx_pool->free_map) { 601 release_rx_pools(adapter); 602 return -1; 603 } 604 605 rx_pool->rx_buff = kcalloc(rx_pool->size, 606 sizeof(struct ibmvnic_rx_buff), 607 GFP_KERNEL); 608 if (!rx_pool->rx_buff) { 609 dev_err(dev, "Couldn't alloc rx buffers\n"); 610 release_rx_pools(adapter); 611 return -1; 612 } 613 614 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 615 rx_pool->size * rx_pool->buff_size)) { 616 release_rx_pools(adapter); 617 return -1; 618 } 619 620 for (j = 0; j < rx_pool->size; ++j) 621 rx_pool->free_map[j] = j; 622 623 atomic_set(&rx_pool->available, 0); 624 rx_pool->next_alloc = 0; 625 rx_pool->next_free = 0; 626 } 627 628 return 0; 629 } 630 631 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 632 struct ibmvnic_tx_pool *tx_pool) 633 { 634 int rc, i; 635 636 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 637 if (rc) 638 return rc; 639 640 memset(tx_pool->tx_buff, 0, 641 tx_pool->num_buffers * 642 sizeof(struct ibmvnic_tx_buff)); 643 644 for (i = 0; i < tx_pool->num_buffers; i++) 645 tx_pool->free_map[i] = i; 646 647 tx_pool->consumer_index = 0; 648 tx_pool->producer_index = 0; 649 650 return 0; 651 } 652 653 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 654 { 655 int tx_scrqs; 656 int i, rc; 657 658 if (!adapter->tx_pool) 659 return -1; 660 661 tx_scrqs = adapter->num_active_tx_pools; 662 for (i = 0; i < tx_scrqs; i++) { 663 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 664 if (rc) 665 return rc; 666 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 667 if (rc) 668 return rc; 669 } 670 671 return 0; 672 } 673 674 static void release_vpd_data(struct ibmvnic_adapter *adapter) 675 { 676 if (!adapter->vpd) 677 return; 678 679 kfree(adapter->vpd->buff); 680 kfree(adapter->vpd); 681 682 adapter->vpd = NULL; 683 } 684 685 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 686 struct ibmvnic_tx_pool *tx_pool) 687 { 688 kfree(tx_pool->tx_buff); 689 kfree(tx_pool->free_map); 690 free_long_term_buff(adapter, &tx_pool->long_term_buff); 691 } 692 693 static void release_tx_pools(struct ibmvnic_adapter *adapter) 694 { 695 int i; 696 697 if (!adapter->tx_pool) 698 return; 699 700 for (i = 0; i < adapter->num_active_tx_pools; i++) { 701 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 702 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 703 } 704 705 kfree(adapter->tx_pool); 706 adapter->tx_pool = NULL; 707 kfree(adapter->tso_pool); 708 adapter->tso_pool = NULL; 709 adapter->num_active_tx_pools = 0; 710 } 711 712 static int init_one_tx_pool(struct net_device *netdev, 713 struct ibmvnic_tx_pool *tx_pool, 714 int num_entries, int buf_size) 715 { 716 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 717 int i; 718 719 tx_pool->tx_buff = kcalloc(num_entries, 720 sizeof(struct ibmvnic_tx_buff), 721 GFP_KERNEL); 722 if (!tx_pool->tx_buff) 723 return -1; 724 725 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 726 num_entries * buf_size)) 727 return -1; 728 729 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 730 if (!tx_pool->free_map) 731 return -1; 732 733 for (i = 0; i < num_entries; i++) 734 tx_pool->free_map[i] = i; 735 736 tx_pool->consumer_index = 0; 737 tx_pool->producer_index = 0; 738 tx_pool->num_buffers = num_entries; 739 tx_pool->buf_size = buf_size; 740 741 return 0; 742 } 743 744 static int init_tx_pools(struct net_device *netdev) 745 { 746 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 747 int tx_subcrqs; 748 u64 buff_size; 749 int i, rc; 750 751 tx_subcrqs = adapter->num_active_tx_scrqs; 752 adapter->tx_pool = kcalloc(tx_subcrqs, 753 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 754 if (!adapter->tx_pool) 755 return -1; 756 757 adapter->tso_pool = kcalloc(tx_subcrqs, 758 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 759 if (!adapter->tso_pool) 760 return -1; 761 762 adapter->num_active_tx_pools = tx_subcrqs; 763 764 for (i = 0; i < tx_subcrqs; i++) { 765 buff_size = adapter->req_mtu + VLAN_HLEN; 766 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 767 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 768 adapter->req_tx_entries_per_subcrq, 769 buff_size); 770 if (rc) { 771 release_tx_pools(adapter); 772 return rc; 773 } 774 775 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 776 IBMVNIC_TSO_BUFS, 777 IBMVNIC_TSO_BUF_SZ); 778 if (rc) { 779 release_tx_pools(adapter); 780 return rc; 781 } 782 } 783 784 return 0; 785 } 786 787 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 788 { 789 int i; 790 791 if (adapter->napi_enabled) 792 return; 793 794 for (i = 0; i < adapter->req_rx_queues; i++) 795 napi_enable(&adapter->napi[i]); 796 797 adapter->napi_enabled = true; 798 } 799 800 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 801 { 802 int i; 803 804 if (!adapter->napi_enabled) 805 return; 806 807 for (i = 0; i < adapter->req_rx_queues; i++) { 808 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 809 napi_disable(&adapter->napi[i]); 810 } 811 812 adapter->napi_enabled = false; 813 } 814 815 static int init_napi(struct ibmvnic_adapter *adapter) 816 { 817 int i; 818 819 adapter->napi = kcalloc(adapter->req_rx_queues, 820 sizeof(struct napi_struct), GFP_KERNEL); 821 if (!adapter->napi) 822 return -ENOMEM; 823 824 for (i = 0; i < adapter->req_rx_queues; i++) { 825 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 826 netif_napi_add(adapter->netdev, &adapter->napi[i], 827 ibmvnic_poll, NAPI_POLL_WEIGHT); 828 } 829 830 adapter->num_active_rx_napi = adapter->req_rx_queues; 831 return 0; 832 } 833 834 static void release_napi(struct ibmvnic_adapter *adapter) 835 { 836 int i; 837 838 if (!adapter->napi) 839 return; 840 841 for (i = 0; i < adapter->num_active_rx_napi; i++) { 842 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 843 netif_napi_del(&adapter->napi[i]); 844 } 845 846 kfree(adapter->napi); 847 adapter->napi = NULL; 848 adapter->num_active_rx_napi = 0; 849 adapter->napi_enabled = false; 850 } 851 852 static int ibmvnic_login(struct net_device *netdev) 853 { 854 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 855 unsigned long timeout = msecs_to_jiffies(20000); 856 int retry_count = 0; 857 int retries = 10; 858 bool retry; 859 int rc; 860 861 do { 862 retry = false; 863 if (retry_count > retries) { 864 netdev_warn(netdev, "Login attempts exceeded\n"); 865 return -1; 866 } 867 868 adapter->init_done_rc = 0; 869 reinit_completion(&adapter->init_done); 870 rc = send_login(adapter); 871 if (rc) 872 return rc; 873 874 if (!wait_for_completion_timeout(&adapter->init_done, 875 timeout)) { 876 netdev_warn(netdev, "Login timed out, retrying...\n"); 877 retry = true; 878 adapter->init_done_rc = 0; 879 retry_count++; 880 continue; 881 } 882 883 if (adapter->init_done_rc == ABORTED) { 884 netdev_warn(netdev, "Login aborted, retrying...\n"); 885 retry = true; 886 adapter->init_done_rc = 0; 887 retry_count++; 888 /* FW or device may be busy, so 889 * wait a bit before retrying login 890 */ 891 msleep(500); 892 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 893 retry_count++; 894 release_sub_crqs(adapter, 1); 895 896 retry = true; 897 netdev_dbg(netdev, 898 "Received partial success, retrying...\n"); 899 adapter->init_done_rc = 0; 900 reinit_completion(&adapter->init_done); 901 send_query_cap(adapter); 902 if (!wait_for_completion_timeout(&adapter->init_done, 903 timeout)) { 904 netdev_warn(netdev, 905 "Capabilities query timed out\n"); 906 return -1; 907 } 908 909 rc = init_sub_crqs(adapter); 910 if (rc) { 911 netdev_warn(netdev, 912 "SCRQ initialization failed\n"); 913 return -1; 914 } 915 916 rc = init_sub_crq_irqs(adapter); 917 if (rc) { 918 netdev_warn(netdev, 919 "SCRQ irq initialization failed\n"); 920 return -1; 921 } 922 } else if (adapter->init_done_rc) { 923 netdev_warn(netdev, "Adapter login failed\n"); 924 return -1; 925 } 926 } while (retry); 927 928 __ibmvnic_set_mac(netdev, adapter->mac_addr); 929 930 return 0; 931 } 932 933 static void release_login_buffer(struct ibmvnic_adapter *adapter) 934 { 935 kfree(adapter->login_buf); 936 adapter->login_buf = NULL; 937 } 938 939 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 940 { 941 kfree(adapter->login_rsp_buf); 942 adapter->login_rsp_buf = NULL; 943 } 944 945 static void release_resources(struct ibmvnic_adapter *adapter) 946 { 947 release_vpd_data(adapter); 948 949 release_tx_pools(adapter); 950 release_rx_pools(adapter); 951 952 release_napi(adapter); 953 release_login_rsp_buffer(adapter); 954 } 955 956 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 957 { 958 struct net_device *netdev = adapter->netdev; 959 unsigned long timeout = msecs_to_jiffies(20000); 960 union ibmvnic_crq crq; 961 bool resend; 962 int rc; 963 964 netdev_dbg(netdev, "setting link state %d\n", link_state); 965 966 memset(&crq, 0, sizeof(crq)); 967 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 968 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 969 crq.logical_link_state.link_state = link_state; 970 971 do { 972 resend = false; 973 974 reinit_completion(&adapter->init_done); 975 rc = ibmvnic_send_crq(adapter, &crq); 976 if (rc) { 977 netdev_err(netdev, "Failed to set link state\n"); 978 return rc; 979 } 980 981 if (!wait_for_completion_timeout(&adapter->init_done, 982 timeout)) { 983 netdev_err(netdev, "timeout setting link state\n"); 984 return -1; 985 } 986 987 if (adapter->init_done_rc == PARTIALSUCCESS) { 988 /* Partuial success, delay and re-send */ 989 mdelay(1000); 990 resend = true; 991 } else if (adapter->init_done_rc) { 992 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 993 adapter->init_done_rc); 994 return adapter->init_done_rc; 995 } 996 } while (resend); 997 998 return 0; 999 } 1000 1001 static int set_real_num_queues(struct net_device *netdev) 1002 { 1003 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1004 int rc; 1005 1006 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1007 adapter->req_tx_queues, adapter->req_rx_queues); 1008 1009 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1010 if (rc) { 1011 netdev_err(netdev, "failed to set the number of tx queues\n"); 1012 return rc; 1013 } 1014 1015 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1016 if (rc) 1017 netdev_err(netdev, "failed to set the number of rx queues\n"); 1018 1019 return rc; 1020 } 1021 1022 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1023 { 1024 struct device *dev = &adapter->vdev->dev; 1025 union ibmvnic_crq crq; 1026 int len = 0; 1027 int rc; 1028 1029 if (adapter->vpd->buff) 1030 len = adapter->vpd->len; 1031 1032 mutex_lock(&adapter->fw_lock); 1033 adapter->fw_done_rc = 0; 1034 reinit_completion(&adapter->fw_done); 1035 1036 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1037 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1038 rc = ibmvnic_send_crq(adapter, &crq); 1039 if (rc) { 1040 mutex_unlock(&adapter->fw_lock); 1041 return rc; 1042 } 1043 1044 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1045 if (rc) { 1046 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1047 mutex_unlock(&adapter->fw_lock); 1048 return rc; 1049 } 1050 mutex_unlock(&adapter->fw_lock); 1051 1052 if (!adapter->vpd->len) 1053 return -ENODATA; 1054 1055 if (!adapter->vpd->buff) 1056 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1057 else if (adapter->vpd->len != len) 1058 adapter->vpd->buff = 1059 krealloc(adapter->vpd->buff, 1060 adapter->vpd->len, GFP_KERNEL); 1061 1062 if (!adapter->vpd->buff) { 1063 dev_err(dev, "Could allocate VPD buffer\n"); 1064 return -ENOMEM; 1065 } 1066 1067 adapter->vpd->dma_addr = 1068 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1069 DMA_FROM_DEVICE); 1070 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1071 dev_err(dev, "Could not map VPD buffer\n"); 1072 kfree(adapter->vpd->buff); 1073 adapter->vpd->buff = NULL; 1074 return -ENOMEM; 1075 } 1076 1077 mutex_lock(&adapter->fw_lock); 1078 adapter->fw_done_rc = 0; 1079 reinit_completion(&adapter->fw_done); 1080 1081 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1082 crq.get_vpd.cmd = GET_VPD; 1083 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1084 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1085 rc = ibmvnic_send_crq(adapter, &crq); 1086 if (rc) { 1087 kfree(adapter->vpd->buff); 1088 adapter->vpd->buff = NULL; 1089 mutex_unlock(&adapter->fw_lock); 1090 return rc; 1091 } 1092 1093 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1094 if (rc) { 1095 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1096 kfree(adapter->vpd->buff); 1097 adapter->vpd->buff = NULL; 1098 mutex_unlock(&adapter->fw_lock); 1099 return rc; 1100 } 1101 1102 mutex_unlock(&adapter->fw_lock); 1103 return 0; 1104 } 1105 1106 static int init_resources(struct ibmvnic_adapter *adapter) 1107 { 1108 struct net_device *netdev = adapter->netdev; 1109 int rc; 1110 1111 rc = set_real_num_queues(netdev); 1112 if (rc) 1113 return rc; 1114 1115 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1116 if (!adapter->vpd) 1117 return -ENOMEM; 1118 1119 /* Vital Product Data (VPD) */ 1120 rc = ibmvnic_get_vpd(adapter); 1121 if (rc) { 1122 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1123 return rc; 1124 } 1125 1126 adapter->map_id = 1; 1127 1128 rc = init_napi(adapter); 1129 if (rc) 1130 return rc; 1131 1132 send_query_map(adapter); 1133 1134 rc = init_rx_pools(netdev); 1135 if (rc) 1136 return rc; 1137 1138 rc = init_tx_pools(netdev); 1139 return rc; 1140 } 1141 1142 static int __ibmvnic_open(struct net_device *netdev) 1143 { 1144 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1145 enum vnic_state prev_state = adapter->state; 1146 int i, rc; 1147 1148 adapter->state = VNIC_OPENING; 1149 replenish_pools(adapter); 1150 ibmvnic_napi_enable(adapter); 1151 1152 /* We're ready to receive frames, enable the sub-crq interrupts and 1153 * set the logical link state to up 1154 */ 1155 for (i = 0; i < adapter->req_rx_queues; i++) { 1156 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1157 if (prev_state == VNIC_CLOSED) 1158 enable_irq(adapter->rx_scrq[i]->irq); 1159 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1160 } 1161 1162 for (i = 0; i < adapter->req_tx_queues; i++) { 1163 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1164 if (prev_state == VNIC_CLOSED) 1165 enable_irq(adapter->tx_scrq[i]->irq); 1166 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1167 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1168 } 1169 1170 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1171 if (rc) { 1172 for (i = 0; i < adapter->req_rx_queues; i++) 1173 napi_disable(&adapter->napi[i]); 1174 release_resources(adapter); 1175 return rc; 1176 } 1177 1178 netif_tx_start_all_queues(netdev); 1179 1180 if (prev_state == VNIC_CLOSED) { 1181 for (i = 0; i < adapter->req_rx_queues; i++) 1182 napi_schedule(&adapter->napi[i]); 1183 } 1184 1185 adapter->state = VNIC_OPEN; 1186 return rc; 1187 } 1188 1189 static int ibmvnic_open(struct net_device *netdev) 1190 { 1191 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1192 int rc; 1193 1194 /* If device failover is pending, just set device state and return. 1195 * Device operation will be handled by reset routine. 1196 */ 1197 if (adapter->failover_pending) { 1198 adapter->state = VNIC_OPEN; 1199 return 0; 1200 } 1201 1202 if (adapter->state != VNIC_CLOSED) { 1203 rc = ibmvnic_login(netdev); 1204 if (rc) 1205 goto out; 1206 1207 rc = init_resources(adapter); 1208 if (rc) { 1209 netdev_err(netdev, "failed to initialize resources\n"); 1210 release_resources(adapter); 1211 goto out; 1212 } 1213 } 1214 1215 rc = __ibmvnic_open(netdev); 1216 1217 out: 1218 /* 1219 * If open fails due to a pending failover, set device state and 1220 * return. Device operation will be handled by reset routine. 1221 */ 1222 if (rc && adapter->failover_pending) { 1223 adapter->state = VNIC_OPEN; 1224 rc = 0; 1225 } 1226 return rc; 1227 } 1228 1229 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1230 { 1231 struct ibmvnic_rx_pool *rx_pool; 1232 struct ibmvnic_rx_buff *rx_buff; 1233 u64 rx_entries; 1234 int rx_scrqs; 1235 int i, j; 1236 1237 if (!adapter->rx_pool) 1238 return; 1239 1240 rx_scrqs = adapter->num_active_rx_pools; 1241 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1242 1243 /* Free any remaining skbs in the rx buffer pools */ 1244 for (i = 0; i < rx_scrqs; i++) { 1245 rx_pool = &adapter->rx_pool[i]; 1246 if (!rx_pool || !rx_pool->rx_buff) 1247 continue; 1248 1249 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1250 for (j = 0; j < rx_entries; j++) { 1251 rx_buff = &rx_pool->rx_buff[j]; 1252 if (rx_buff && rx_buff->skb) { 1253 dev_kfree_skb_any(rx_buff->skb); 1254 rx_buff->skb = NULL; 1255 } 1256 } 1257 } 1258 } 1259 1260 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1261 struct ibmvnic_tx_pool *tx_pool) 1262 { 1263 struct ibmvnic_tx_buff *tx_buff; 1264 u64 tx_entries; 1265 int i; 1266 1267 if (!tx_pool || !tx_pool->tx_buff) 1268 return; 1269 1270 tx_entries = tx_pool->num_buffers; 1271 1272 for (i = 0; i < tx_entries; i++) { 1273 tx_buff = &tx_pool->tx_buff[i]; 1274 if (tx_buff && tx_buff->skb) { 1275 dev_kfree_skb_any(tx_buff->skb); 1276 tx_buff->skb = NULL; 1277 } 1278 } 1279 } 1280 1281 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1282 { 1283 int tx_scrqs; 1284 int i; 1285 1286 if (!adapter->tx_pool || !adapter->tso_pool) 1287 return; 1288 1289 tx_scrqs = adapter->num_active_tx_pools; 1290 1291 /* Free any remaining skbs in the tx buffer pools */ 1292 for (i = 0; i < tx_scrqs; i++) { 1293 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1294 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1295 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1296 } 1297 } 1298 1299 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1300 { 1301 struct net_device *netdev = adapter->netdev; 1302 int i; 1303 1304 if (adapter->tx_scrq) { 1305 for (i = 0; i < adapter->req_tx_queues; i++) 1306 if (adapter->tx_scrq[i]->irq) { 1307 netdev_dbg(netdev, 1308 "Disabling tx_scrq[%d] irq\n", i); 1309 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1310 disable_irq(adapter->tx_scrq[i]->irq); 1311 } 1312 } 1313 1314 if (adapter->rx_scrq) { 1315 for (i = 0; i < adapter->req_rx_queues; i++) { 1316 if (adapter->rx_scrq[i]->irq) { 1317 netdev_dbg(netdev, 1318 "Disabling rx_scrq[%d] irq\n", i); 1319 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1320 disable_irq(adapter->rx_scrq[i]->irq); 1321 } 1322 } 1323 } 1324 } 1325 1326 static void ibmvnic_cleanup(struct net_device *netdev) 1327 { 1328 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1329 1330 /* ensure that transmissions are stopped if called by do_reset */ 1331 if (test_bit(0, &adapter->resetting)) 1332 netif_tx_disable(netdev); 1333 else 1334 netif_tx_stop_all_queues(netdev); 1335 1336 ibmvnic_napi_disable(adapter); 1337 ibmvnic_disable_irqs(adapter); 1338 1339 clean_rx_pools(adapter); 1340 clean_tx_pools(adapter); 1341 } 1342 1343 static int __ibmvnic_close(struct net_device *netdev) 1344 { 1345 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1346 int rc = 0; 1347 1348 adapter->state = VNIC_CLOSING; 1349 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1350 if (rc) 1351 return rc; 1352 adapter->state = VNIC_CLOSED; 1353 return 0; 1354 } 1355 1356 static int ibmvnic_close(struct net_device *netdev) 1357 { 1358 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1359 int rc; 1360 1361 /* If device failover is pending, just set device state and return. 1362 * Device operation will be handled by reset routine. 1363 */ 1364 if (adapter->failover_pending) { 1365 adapter->state = VNIC_CLOSED; 1366 return 0; 1367 } 1368 1369 rc = __ibmvnic_close(netdev); 1370 ibmvnic_cleanup(netdev); 1371 1372 return rc; 1373 } 1374 1375 /** 1376 * build_hdr_data - creates L2/L3/L4 header data buffer 1377 * @hdr_field - bitfield determining needed headers 1378 * @skb - socket buffer 1379 * @hdr_len - array of header lengths 1380 * @tot_len - total length of data 1381 * 1382 * Reads hdr_field to determine which headers are needed by firmware. 1383 * Builds a buffer containing these headers. Saves individual header 1384 * lengths and total buffer length to be used to build descriptors. 1385 */ 1386 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1387 int *hdr_len, u8 *hdr_data) 1388 { 1389 int len = 0; 1390 u8 *hdr; 1391 1392 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1393 hdr_len[0] = sizeof(struct vlan_ethhdr); 1394 else 1395 hdr_len[0] = sizeof(struct ethhdr); 1396 1397 if (skb->protocol == htons(ETH_P_IP)) { 1398 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1399 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1400 hdr_len[2] = tcp_hdrlen(skb); 1401 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1402 hdr_len[2] = sizeof(struct udphdr); 1403 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1404 hdr_len[1] = sizeof(struct ipv6hdr); 1405 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1406 hdr_len[2] = tcp_hdrlen(skb); 1407 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1408 hdr_len[2] = sizeof(struct udphdr); 1409 } else if (skb->protocol == htons(ETH_P_ARP)) { 1410 hdr_len[1] = arp_hdr_len(skb->dev); 1411 hdr_len[2] = 0; 1412 } 1413 1414 memset(hdr_data, 0, 120); 1415 if ((hdr_field >> 6) & 1) { 1416 hdr = skb_mac_header(skb); 1417 memcpy(hdr_data, hdr, hdr_len[0]); 1418 len += hdr_len[0]; 1419 } 1420 1421 if ((hdr_field >> 5) & 1) { 1422 hdr = skb_network_header(skb); 1423 memcpy(hdr_data + len, hdr, hdr_len[1]); 1424 len += hdr_len[1]; 1425 } 1426 1427 if ((hdr_field >> 4) & 1) { 1428 hdr = skb_transport_header(skb); 1429 memcpy(hdr_data + len, hdr, hdr_len[2]); 1430 len += hdr_len[2]; 1431 } 1432 return len; 1433 } 1434 1435 /** 1436 * create_hdr_descs - create header and header extension descriptors 1437 * @hdr_field - bitfield determining needed headers 1438 * @data - buffer containing header data 1439 * @len - length of data buffer 1440 * @hdr_len - array of individual header lengths 1441 * @scrq_arr - descriptor array 1442 * 1443 * Creates header and, if needed, header extension descriptors and 1444 * places them in a descriptor array, scrq_arr 1445 */ 1446 1447 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1448 union sub_crq *scrq_arr) 1449 { 1450 union sub_crq hdr_desc; 1451 int tmp_len = len; 1452 int num_descs = 0; 1453 u8 *data, *cur; 1454 int tmp; 1455 1456 while (tmp_len > 0) { 1457 cur = hdr_data + len - tmp_len; 1458 1459 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1460 if (cur != hdr_data) { 1461 data = hdr_desc.hdr_ext.data; 1462 tmp = tmp_len > 29 ? 29 : tmp_len; 1463 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1464 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1465 hdr_desc.hdr_ext.len = tmp; 1466 } else { 1467 data = hdr_desc.hdr.data; 1468 tmp = tmp_len > 24 ? 24 : tmp_len; 1469 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1470 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1471 hdr_desc.hdr.len = tmp; 1472 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1473 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1474 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1475 hdr_desc.hdr.flag = hdr_field << 1; 1476 } 1477 memcpy(data, cur, tmp); 1478 tmp_len -= tmp; 1479 *scrq_arr = hdr_desc; 1480 scrq_arr++; 1481 num_descs++; 1482 } 1483 1484 return num_descs; 1485 } 1486 1487 /** 1488 * build_hdr_descs_arr - build a header descriptor array 1489 * @skb - socket buffer 1490 * @num_entries - number of descriptors to be sent 1491 * @subcrq - first TX descriptor 1492 * @hdr_field - bit field determining which headers will be sent 1493 * 1494 * This function will build a TX descriptor array with applicable 1495 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1496 */ 1497 1498 static void build_hdr_descs_arr(struct sk_buff *skb, 1499 union sub_crq *indir_arr, 1500 int *num_entries, u8 hdr_field) 1501 { 1502 int hdr_len[3] = {0, 0, 0}; 1503 u8 hdr_data[140] = {0}; 1504 int tot_len; 1505 1506 tot_len = build_hdr_data(hdr_field, skb, hdr_len, 1507 hdr_data); 1508 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1509 indir_arr + 1); 1510 } 1511 1512 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1513 struct net_device *netdev) 1514 { 1515 /* For some backing devices, mishandling of small packets 1516 * can result in a loss of connection or TX stall. Device 1517 * architects recommend that no packet should be smaller 1518 * than the minimum MTU value provided to the driver, so 1519 * pad any packets to that length 1520 */ 1521 if (skb->len < netdev->min_mtu) 1522 return skb_put_padto(skb, netdev->min_mtu); 1523 1524 return 0; 1525 } 1526 1527 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 1528 struct ibmvnic_sub_crq_queue *tx_scrq) 1529 { 1530 struct ibmvnic_ind_xmit_queue *ind_bufp; 1531 struct ibmvnic_tx_buff *tx_buff; 1532 struct ibmvnic_tx_pool *tx_pool; 1533 union sub_crq tx_scrq_entry; 1534 int queue_num; 1535 int entries; 1536 int index; 1537 int i; 1538 1539 ind_bufp = &tx_scrq->ind_buf; 1540 entries = (u64)ind_bufp->index; 1541 queue_num = tx_scrq->pool_index; 1542 1543 for (i = entries - 1; i >= 0; --i) { 1544 tx_scrq_entry = ind_bufp->indir_arr[i]; 1545 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 1546 continue; 1547 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 1548 if (index & IBMVNIC_TSO_POOL_MASK) { 1549 tx_pool = &adapter->tso_pool[queue_num]; 1550 index &= ~IBMVNIC_TSO_POOL_MASK; 1551 } else { 1552 tx_pool = &adapter->tx_pool[queue_num]; 1553 } 1554 tx_pool->free_map[tx_pool->consumer_index] = index; 1555 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1556 tx_pool->num_buffers - 1 : 1557 tx_pool->consumer_index - 1; 1558 tx_buff = &tx_pool->tx_buff[index]; 1559 adapter->netdev->stats.tx_packets--; 1560 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 1561 adapter->tx_stats_buffers[queue_num].packets--; 1562 adapter->tx_stats_buffers[queue_num].bytes -= 1563 tx_buff->skb->len; 1564 dev_kfree_skb_any(tx_buff->skb); 1565 tx_buff->skb = NULL; 1566 adapter->netdev->stats.tx_dropped++; 1567 } 1568 ind_bufp->index = 0; 1569 if (atomic_sub_return(entries, &tx_scrq->used) <= 1570 (adapter->req_tx_entries_per_subcrq / 2) && 1571 __netif_subqueue_stopped(adapter->netdev, queue_num)) { 1572 netif_wake_subqueue(adapter->netdev, queue_num); 1573 netdev_dbg(adapter->netdev, "Started queue %d\n", 1574 queue_num); 1575 } 1576 } 1577 1578 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 1579 struct ibmvnic_sub_crq_queue *tx_scrq) 1580 { 1581 struct ibmvnic_ind_xmit_queue *ind_bufp; 1582 u64 dma_addr; 1583 u64 entries; 1584 u64 handle; 1585 int rc; 1586 1587 ind_bufp = &tx_scrq->ind_buf; 1588 dma_addr = (u64)ind_bufp->indir_dma; 1589 entries = (u64)ind_bufp->index; 1590 handle = tx_scrq->handle; 1591 1592 if (!entries) 1593 return 0; 1594 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 1595 if (rc) 1596 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 1597 else 1598 ind_bufp->index = 0; 1599 return 0; 1600 } 1601 1602 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1603 { 1604 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1605 int queue_num = skb_get_queue_mapping(skb); 1606 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1607 struct device *dev = &adapter->vdev->dev; 1608 struct ibmvnic_ind_xmit_queue *ind_bufp; 1609 struct ibmvnic_tx_buff *tx_buff = NULL; 1610 struct ibmvnic_sub_crq_queue *tx_scrq; 1611 struct ibmvnic_tx_pool *tx_pool; 1612 unsigned int tx_send_failed = 0; 1613 netdev_tx_t ret = NETDEV_TX_OK; 1614 unsigned int tx_map_failed = 0; 1615 union sub_crq indir_arr[16]; 1616 unsigned int tx_dropped = 0; 1617 unsigned int tx_packets = 0; 1618 unsigned int tx_bytes = 0; 1619 dma_addr_t data_dma_addr; 1620 struct netdev_queue *txq; 1621 unsigned long lpar_rc; 1622 union sub_crq tx_crq; 1623 unsigned int offset; 1624 int num_entries = 1; 1625 unsigned char *dst; 1626 int index = 0; 1627 u8 proto = 0; 1628 1629 tx_scrq = adapter->tx_scrq[queue_num]; 1630 txq = netdev_get_tx_queue(netdev, queue_num); 1631 ind_bufp = &tx_scrq->ind_buf; 1632 1633 if (test_bit(0, &adapter->resetting)) { 1634 if (!netif_subqueue_stopped(netdev, skb)) 1635 netif_stop_subqueue(netdev, queue_num); 1636 dev_kfree_skb_any(skb); 1637 1638 tx_send_failed++; 1639 tx_dropped++; 1640 ret = NETDEV_TX_OK; 1641 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1642 goto out; 1643 } 1644 1645 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1646 tx_dropped++; 1647 tx_send_failed++; 1648 ret = NETDEV_TX_OK; 1649 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1650 goto out; 1651 } 1652 if (skb_is_gso(skb)) 1653 tx_pool = &adapter->tso_pool[queue_num]; 1654 else 1655 tx_pool = &adapter->tx_pool[queue_num]; 1656 1657 index = tx_pool->free_map[tx_pool->consumer_index]; 1658 1659 if (index == IBMVNIC_INVALID_MAP) { 1660 dev_kfree_skb_any(skb); 1661 tx_send_failed++; 1662 tx_dropped++; 1663 ret = NETDEV_TX_OK; 1664 ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1665 goto out; 1666 } 1667 1668 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1669 1670 offset = index * tx_pool->buf_size; 1671 dst = tx_pool->long_term_buff.buff + offset; 1672 memset(dst, 0, tx_pool->buf_size); 1673 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1674 1675 if (skb_shinfo(skb)->nr_frags) { 1676 int cur, i; 1677 1678 /* Copy the head */ 1679 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1680 cur = skb_headlen(skb); 1681 1682 /* Copy the frags */ 1683 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1684 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1685 1686 memcpy(dst + cur, 1687 page_address(skb_frag_page(frag)) + 1688 skb_frag_off(frag), skb_frag_size(frag)); 1689 cur += skb_frag_size(frag); 1690 } 1691 } else { 1692 skb_copy_from_linear_data(skb, dst, skb->len); 1693 } 1694 1695 tx_pool->consumer_index = 1696 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1697 1698 tx_buff = &tx_pool->tx_buff[index]; 1699 tx_buff->skb = skb; 1700 tx_buff->index = index; 1701 tx_buff->pool_index = queue_num; 1702 1703 memset(&tx_crq, 0, sizeof(tx_crq)); 1704 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1705 tx_crq.v1.type = IBMVNIC_TX_DESC; 1706 tx_crq.v1.n_crq_elem = 1; 1707 tx_crq.v1.n_sge = 1; 1708 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1709 1710 if (skb_is_gso(skb)) 1711 tx_crq.v1.correlator = 1712 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1713 else 1714 tx_crq.v1.correlator = cpu_to_be32(index); 1715 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1716 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1717 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1718 1719 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1720 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1721 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1722 } 1723 1724 if (skb->protocol == htons(ETH_P_IP)) { 1725 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1726 proto = ip_hdr(skb)->protocol; 1727 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1728 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1729 proto = ipv6_hdr(skb)->nexthdr; 1730 } 1731 1732 if (proto == IPPROTO_TCP) 1733 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1734 else if (proto == IPPROTO_UDP) 1735 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1736 1737 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1738 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1739 hdrs += 2; 1740 } 1741 if (skb_is_gso(skb)) { 1742 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1743 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1744 hdrs += 2; 1745 } 1746 1747 if ((*hdrs >> 7) & 1) 1748 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 1749 1750 tx_crq.v1.n_crq_elem = num_entries; 1751 tx_buff->num_entries = num_entries; 1752 /* flush buffer if current entry can not fit */ 1753 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 1754 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1755 if (lpar_rc != H_SUCCESS) 1756 goto tx_flush_err; 1757 } 1758 1759 indir_arr[0] = tx_crq; 1760 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 1761 num_entries * sizeof(struct ibmvnic_generic_scrq)); 1762 ind_bufp->index += num_entries; 1763 if (__netdev_tx_sent_queue(txq, skb->len, 1764 netdev_xmit_more() && 1765 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 1766 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq); 1767 if (lpar_rc != H_SUCCESS) 1768 goto tx_err; 1769 } 1770 1771 if (atomic_add_return(num_entries, &tx_scrq->used) 1772 >= adapter->req_tx_entries_per_subcrq) { 1773 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1774 netif_stop_subqueue(netdev, queue_num); 1775 } 1776 1777 tx_packets++; 1778 tx_bytes += skb->len; 1779 txq->trans_start = jiffies; 1780 ret = NETDEV_TX_OK; 1781 goto out; 1782 1783 tx_flush_err: 1784 dev_kfree_skb_any(skb); 1785 tx_buff->skb = NULL; 1786 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 1787 tx_pool->num_buffers - 1 : 1788 tx_pool->consumer_index - 1; 1789 tx_dropped++; 1790 tx_err: 1791 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1792 dev_err_ratelimited(dev, "tx: send failed\n"); 1793 1794 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1795 /* Disable TX and report carrier off if queue is closed 1796 * or pending failover. 1797 * Firmware guarantees that a signal will be sent to the 1798 * driver, triggering a reset or some other action. 1799 */ 1800 netif_tx_stop_all_queues(netdev); 1801 netif_carrier_off(netdev); 1802 } 1803 out: 1804 netdev->stats.tx_dropped += tx_dropped; 1805 netdev->stats.tx_bytes += tx_bytes; 1806 netdev->stats.tx_packets += tx_packets; 1807 adapter->tx_send_failed += tx_send_failed; 1808 adapter->tx_map_failed += tx_map_failed; 1809 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1810 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1811 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1812 1813 return ret; 1814 } 1815 1816 static void ibmvnic_set_multi(struct net_device *netdev) 1817 { 1818 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1819 struct netdev_hw_addr *ha; 1820 union ibmvnic_crq crq; 1821 1822 memset(&crq, 0, sizeof(crq)); 1823 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1824 crq.request_capability.cmd = REQUEST_CAPABILITY; 1825 1826 if (netdev->flags & IFF_PROMISC) { 1827 if (!adapter->promisc_supported) 1828 return; 1829 } else { 1830 if (netdev->flags & IFF_ALLMULTI) { 1831 /* Accept all multicast */ 1832 memset(&crq, 0, sizeof(crq)); 1833 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1834 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1835 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1836 ibmvnic_send_crq(adapter, &crq); 1837 } else if (netdev_mc_empty(netdev)) { 1838 /* Reject all multicast */ 1839 memset(&crq, 0, sizeof(crq)); 1840 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1841 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1842 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1843 ibmvnic_send_crq(adapter, &crq); 1844 } else { 1845 /* Accept one or more multicast(s) */ 1846 netdev_for_each_mc_addr(ha, netdev) { 1847 memset(&crq, 0, sizeof(crq)); 1848 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1849 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1850 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1851 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1852 ha->addr); 1853 ibmvnic_send_crq(adapter, &crq); 1854 } 1855 } 1856 } 1857 } 1858 1859 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1860 { 1861 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1862 union ibmvnic_crq crq; 1863 int rc; 1864 1865 if (!is_valid_ether_addr(dev_addr)) { 1866 rc = -EADDRNOTAVAIL; 1867 goto err; 1868 } 1869 1870 memset(&crq, 0, sizeof(crq)); 1871 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1872 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1873 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1874 1875 mutex_lock(&adapter->fw_lock); 1876 adapter->fw_done_rc = 0; 1877 reinit_completion(&adapter->fw_done); 1878 1879 rc = ibmvnic_send_crq(adapter, &crq); 1880 if (rc) { 1881 rc = -EIO; 1882 mutex_unlock(&adapter->fw_lock); 1883 goto err; 1884 } 1885 1886 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1887 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1888 if (rc || adapter->fw_done_rc) { 1889 rc = -EIO; 1890 mutex_unlock(&adapter->fw_lock); 1891 goto err; 1892 } 1893 mutex_unlock(&adapter->fw_lock); 1894 return 0; 1895 err: 1896 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1897 return rc; 1898 } 1899 1900 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1901 { 1902 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1903 struct sockaddr *addr = p; 1904 int rc; 1905 1906 rc = 0; 1907 if (!is_valid_ether_addr(addr->sa_data)) 1908 return -EADDRNOTAVAIL; 1909 1910 if (adapter->state != VNIC_PROBED) { 1911 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1912 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1913 } 1914 1915 return rc; 1916 } 1917 1918 /** 1919 * do_change_param_reset returns zero if we are able to keep processing reset 1920 * events, or non-zero if we hit a fatal error and must halt. 1921 */ 1922 static int do_change_param_reset(struct ibmvnic_adapter *adapter, 1923 struct ibmvnic_rwi *rwi, 1924 u32 reset_state) 1925 { 1926 struct net_device *netdev = adapter->netdev; 1927 int i, rc; 1928 1929 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n", 1930 rwi->reset_reason); 1931 1932 netif_carrier_off(netdev); 1933 adapter->reset_reason = rwi->reset_reason; 1934 1935 ibmvnic_cleanup(netdev); 1936 1937 if (reset_state == VNIC_OPEN) { 1938 rc = __ibmvnic_close(netdev); 1939 if (rc) 1940 goto out; 1941 } 1942 1943 release_resources(adapter); 1944 release_sub_crqs(adapter, 1); 1945 release_crq_queue(adapter); 1946 1947 adapter->state = VNIC_PROBED; 1948 1949 rc = init_crq_queue(adapter); 1950 1951 if (rc) { 1952 netdev_err(adapter->netdev, 1953 "Couldn't initialize crq. rc=%d\n", rc); 1954 return rc; 1955 } 1956 1957 rc = ibmvnic_reset_init(adapter, true); 1958 if (rc) { 1959 rc = IBMVNIC_INIT_FAILED; 1960 goto out; 1961 } 1962 1963 /* If the adapter was in PROBE state prior to the reset, 1964 * exit here. 1965 */ 1966 if (reset_state == VNIC_PROBED) 1967 goto out; 1968 1969 rc = ibmvnic_login(netdev); 1970 if (rc) { 1971 goto out; 1972 } 1973 1974 rc = init_resources(adapter); 1975 if (rc) 1976 goto out; 1977 1978 ibmvnic_disable_irqs(adapter); 1979 1980 adapter->state = VNIC_CLOSED; 1981 1982 if (reset_state == VNIC_CLOSED) 1983 return 0; 1984 1985 rc = __ibmvnic_open(netdev); 1986 if (rc) { 1987 rc = IBMVNIC_OPEN_FAILED; 1988 goto out; 1989 } 1990 1991 /* refresh device's multicast list */ 1992 ibmvnic_set_multi(netdev); 1993 1994 /* kick napi */ 1995 for (i = 0; i < adapter->req_rx_queues; i++) 1996 napi_schedule(&adapter->napi[i]); 1997 1998 out: 1999 if (rc) 2000 adapter->state = reset_state; 2001 return rc; 2002 } 2003 2004 /** 2005 * do_reset returns zero if we are able to keep processing reset events, or 2006 * non-zero if we hit a fatal error and must halt. 2007 */ 2008 static int do_reset(struct ibmvnic_adapter *adapter, 2009 struct ibmvnic_rwi *rwi, u32 reset_state) 2010 { 2011 u64 old_num_rx_queues, old_num_tx_queues; 2012 u64 old_num_rx_slots, old_num_tx_slots; 2013 struct net_device *netdev = adapter->netdev; 2014 int i, rc; 2015 2016 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 2017 rwi->reset_reason); 2018 2019 rtnl_lock(); 2020 /* 2021 * Now that we have the rtnl lock, clear any pending failover. 2022 * This will ensure ibmvnic_open() has either completed or will 2023 * block until failover is complete. 2024 */ 2025 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2026 adapter->failover_pending = false; 2027 2028 netif_carrier_off(netdev); 2029 adapter->reset_reason = rwi->reset_reason; 2030 2031 old_num_rx_queues = adapter->req_rx_queues; 2032 old_num_tx_queues = adapter->req_tx_queues; 2033 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2034 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2035 2036 ibmvnic_cleanup(netdev); 2037 2038 if (reset_state == VNIC_OPEN && 2039 adapter->reset_reason != VNIC_RESET_MOBILITY && 2040 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2041 adapter->state = VNIC_CLOSING; 2042 2043 /* Release the RTNL lock before link state change and 2044 * re-acquire after the link state change to allow 2045 * linkwatch_event to grab the RTNL lock and run during 2046 * a reset. 2047 */ 2048 rtnl_unlock(); 2049 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2050 rtnl_lock(); 2051 if (rc) 2052 goto out; 2053 2054 if (adapter->state != VNIC_CLOSING) { 2055 rc = -1; 2056 goto out; 2057 } 2058 2059 adapter->state = VNIC_CLOSED; 2060 } 2061 2062 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2063 /* remove the closed state so when we call open it appears 2064 * we are coming from the probed state. 2065 */ 2066 adapter->state = VNIC_PROBED; 2067 2068 if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2069 rc = ibmvnic_reenable_crq_queue(adapter); 2070 release_sub_crqs(adapter, 1); 2071 } else { 2072 rc = ibmvnic_reset_crq(adapter); 2073 if (rc == H_CLOSED || rc == H_SUCCESS) { 2074 rc = vio_enable_interrupts(adapter->vdev); 2075 if (rc) 2076 netdev_err(adapter->netdev, 2077 "Reset failed to enable interrupts. rc=%d\n", 2078 rc); 2079 } 2080 } 2081 2082 if (rc) { 2083 netdev_err(adapter->netdev, 2084 "Reset couldn't initialize crq. rc=%d\n", rc); 2085 goto out; 2086 } 2087 2088 rc = ibmvnic_reset_init(adapter, true); 2089 if (rc) { 2090 rc = IBMVNIC_INIT_FAILED; 2091 goto out; 2092 } 2093 2094 /* If the adapter was in PROBE state prior to the reset, 2095 * exit here. 2096 */ 2097 if (reset_state == VNIC_PROBED) { 2098 rc = 0; 2099 goto out; 2100 } 2101 2102 rc = ibmvnic_login(netdev); 2103 if (rc) { 2104 goto out; 2105 } 2106 2107 if (adapter->req_rx_queues != old_num_rx_queues || 2108 adapter->req_tx_queues != old_num_tx_queues || 2109 adapter->req_rx_add_entries_per_subcrq != 2110 old_num_rx_slots || 2111 adapter->req_tx_entries_per_subcrq != 2112 old_num_tx_slots || 2113 !adapter->rx_pool || 2114 !adapter->tso_pool || 2115 !adapter->tx_pool) { 2116 release_rx_pools(adapter); 2117 release_tx_pools(adapter); 2118 release_napi(adapter); 2119 release_vpd_data(adapter); 2120 2121 rc = init_resources(adapter); 2122 if (rc) 2123 goto out; 2124 2125 } else { 2126 rc = reset_tx_pools(adapter); 2127 if (rc) { 2128 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2129 rc); 2130 goto out; 2131 } 2132 2133 rc = reset_rx_pools(adapter); 2134 if (rc) { 2135 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2136 rc); 2137 goto out; 2138 } 2139 } 2140 ibmvnic_disable_irqs(adapter); 2141 } 2142 adapter->state = VNIC_CLOSED; 2143 2144 if (reset_state == VNIC_CLOSED) { 2145 rc = 0; 2146 goto out; 2147 } 2148 2149 rc = __ibmvnic_open(netdev); 2150 if (rc) { 2151 rc = IBMVNIC_OPEN_FAILED; 2152 goto out; 2153 } 2154 2155 /* refresh device's multicast list */ 2156 ibmvnic_set_multi(netdev); 2157 2158 /* kick napi */ 2159 for (i = 0; i < adapter->req_rx_queues; i++) 2160 napi_schedule(&adapter->napi[i]); 2161 2162 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2163 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2164 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2165 call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev); 2166 } 2167 2168 rc = 0; 2169 2170 out: 2171 /* restore the adapter state if reset failed */ 2172 if (rc) 2173 adapter->state = reset_state; 2174 rtnl_unlock(); 2175 2176 return rc; 2177 } 2178 2179 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2180 struct ibmvnic_rwi *rwi, u32 reset_state) 2181 { 2182 struct net_device *netdev = adapter->netdev; 2183 int rc; 2184 2185 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2186 rwi->reset_reason); 2187 2188 netif_carrier_off(netdev); 2189 adapter->reset_reason = rwi->reset_reason; 2190 2191 ibmvnic_cleanup(netdev); 2192 release_resources(adapter); 2193 release_sub_crqs(adapter, 0); 2194 release_crq_queue(adapter); 2195 2196 /* remove the closed state so when we call open it appears 2197 * we are coming from the probed state. 2198 */ 2199 adapter->state = VNIC_PROBED; 2200 2201 reinit_completion(&adapter->init_done); 2202 rc = init_crq_queue(adapter); 2203 if (rc) { 2204 netdev_err(adapter->netdev, 2205 "Couldn't initialize crq. rc=%d\n", rc); 2206 goto out; 2207 } 2208 2209 rc = ibmvnic_reset_init(adapter, false); 2210 if (rc) 2211 goto out; 2212 2213 /* If the adapter was in PROBE state prior to the reset, 2214 * exit here. 2215 */ 2216 if (reset_state == VNIC_PROBED) 2217 goto out; 2218 2219 rc = ibmvnic_login(netdev); 2220 if (rc) 2221 goto out; 2222 2223 rc = init_resources(adapter); 2224 if (rc) 2225 goto out; 2226 2227 ibmvnic_disable_irqs(adapter); 2228 adapter->state = VNIC_CLOSED; 2229 2230 if (reset_state == VNIC_CLOSED) 2231 goto out; 2232 2233 rc = __ibmvnic_open(netdev); 2234 if (rc) { 2235 rc = IBMVNIC_OPEN_FAILED; 2236 goto out; 2237 } 2238 2239 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2240 call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev); 2241 out: 2242 /* restore adapter state if reset failed */ 2243 if (rc) 2244 adapter->state = reset_state; 2245 return rc; 2246 } 2247 2248 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2249 { 2250 struct ibmvnic_rwi *rwi; 2251 unsigned long flags; 2252 2253 spin_lock_irqsave(&adapter->rwi_lock, flags); 2254 2255 if (!list_empty(&adapter->rwi_list)) { 2256 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2257 list); 2258 list_del(&rwi->list); 2259 } else { 2260 rwi = NULL; 2261 } 2262 2263 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2264 return rwi; 2265 } 2266 2267 static void __ibmvnic_reset(struct work_struct *work) 2268 { 2269 struct ibmvnic_rwi *rwi; 2270 struct ibmvnic_adapter *adapter; 2271 bool saved_state = false; 2272 unsigned long flags; 2273 u32 reset_state; 2274 int rc = 0; 2275 2276 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2277 2278 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2279 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2280 IBMVNIC_RESET_DELAY); 2281 return; 2282 } 2283 2284 rwi = get_next_rwi(adapter); 2285 while (rwi) { 2286 spin_lock_irqsave(&adapter->state_lock, flags); 2287 2288 if (adapter->state == VNIC_REMOVING || 2289 adapter->state == VNIC_REMOVED) { 2290 spin_unlock_irqrestore(&adapter->state_lock, flags); 2291 kfree(rwi); 2292 rc = EBUSY; 2293 break; 2294 } 2295 2296 if (!saved_state) { 2297 reset_state = adapter->state; 2298 saved_state = true; 2299 } 2300 spin_unlock_irqrestore(&adapter->state_lock, flags); 2301 2302 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2303 /* CHANGE_PARAM requestor holds rtnl_lock */ 2304 rc = do_change_param_reset(adapter, rwi, reset_state); 2305 } else if (adapter->force_reset_recovery) { 2306 /* 2307 * Since we are doing a hard reset now, clear the 2308 * failover_pending flag so we don't ignore any 2309 * future MOBILITY or other resets. 2310 */ 2311 adapter->failover_pending = false; 2312 2313 /* Transport event occurred during previous reset */ 2314 if (adapter->wait_for_reset) { 2315 /* Previous was CHANGE_PARAM; caller locked */ 2316 adapter->force_reset_recovery = false; 2317 rc = do_hard_reset(adapter, rwi, reset_state); 2318 } else { 2319 rtnl_lock(); 2320 adapter->force_reset_recovery = false; 2321 rc = do_hard_reset(adapter, rwi, reset_state); 2322 rtnl_unlock(); 2323 } 2324 if (rc) { 2325 /* give backing device time to settle down */ 2326 netdev_dbg(adapter->netdev, 2327 "[S:%d] Hard reset failed, waiting 60 secs\n", 2328 adapter->state); 2329 set_current_state(TASK_UNINTERRUPTIBLE); 2330 schedule_timeout(60 * HZ); 2331 } 2332 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL && 2333 adapter->from_passive_init)) { 2334 rc = do_reset(adapter, rwi, reset_state); 2335 } 2336 kfree(rwi); 2337 adapter->last_reset_time = jiffies; 2338 2339 if (rc) 2340 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 2341 2342 rwi = get_next_rwi(adapter); 2343 2344 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2345 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2346 adapter->force_reset_recovery = true; 2347 } 2348 2349 if (adapter->wait_for_reset) { 2350 adapter->reset_done_rc = rc; 2351 complete(&adapter->reset_done); 2352 } 2353 2354 clear_bit_unlock(0, &adapter->resetting); 2355 } 2356 2357 static void __ibmvnic_delayed_reset(struct work_struct *work) 2358 { 2359 struct ibmvnic_adapter *adapter; 2360 2361 adapter = container_of(work, struct ibmvnic_adapter, 2362 ibmvnic_delayed_reset.work); 2363 __ibmvnic_reset(&adapter->ibmvnic_reset); 2364 } 2365 2366 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2367 enum ibmvnic_reset_reason reason) 2368 { 2369 struct list_head *entry, *tmp_entry; 2370 struct ibmvnic_rwi *rwi, *tmp; 2371 struct net_device *netdev = adapter->netdev; 2372 unsigned long flags; 2373 int ret; 2374 2375 /* 2376 * If failover is pending don't schedule any other reset. 2377 * Instead let the failover complete. If there is already a 2378 * a failover reset scheduled, we will detect and drop the 2379 * duplicate reset when walking the ->rwi_list below. 2380 */ 2381 if (adapter->state == VNIC_REMOVING || 2382 adapter->state == VNIC_REMOVED || 2383 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2384 ret = EBUSY; 2385 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2386 goto err; 2387 } 2388 2389 if (adapter->state == VNIC_PROBING) { 2390 netdev_warn(netdev, "Adapter reset during probe\n"); 2391 ret = adapter->init_done_rc = EAGAIN; 2392 goto err; 2393 } 2394 2395 spin_lock_irqsave(&adapter->rwi_lock, flags); 2396 2397 list_for_each(entry, &adapter->rwi_list) { 2398 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2399 if (tmp->reset_reason == reason) { 2400 netdev_dbg(netdev, "Skipping matching reset\n"); 2401 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2402 ret = EBUSY; 2403 goto err; 2404 } 2405 } 2406 2407 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2408 if (!rwi) { 2409 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2410 ibmvnic_close(netdev); 2411 ret = ENOMEM; 2412 goto err; 2413 } 2414 /* if we just received a transport event, 2415 * flush reset queue and process this reset 2416 */ 2417 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2418 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2419 list_del(entry); 2420 } 2421 rwi->reset_reason = reason; 2422 list_add_tail(&rwi->list, &adapter->rwi_list); 2423 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2424 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2425 schedule_work(&adapter->ibmvnic_reset); 2426 2427 return 0; 2428 err: 2429 return -ret; 2430 } 2431 2432 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2433 { 2434 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2435 2436 if (test_bit(0, &adapter->resetting)) { 2437 netdev_err(adapter->netdev, 2438 "Adapter is resetting, skip timeout reset\n"); 2439 return; 2440 } 2441 /* No queuing up reset until at least 5 seconds (default watchdog val) 2442 * after last reset 2443 */ 2444 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 2445 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 2446 return; 2447 } 2448 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2449 } 2450 2451 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2452 struct ibmvnic_rx_buff *rx_buff) 2453 { 2454 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2455 2456 rx_buff->skb = NULL; 2457 2458 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2459 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2460 2461 atomic_dec(&pool->available); 2462 } 2463 2464 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2465 { 2466 struct ibmvnic_sub_crq_queue *rx_scrq; 2467 struct ibmvnic_adapter *adapter; 2468 struct net_device *netdev; 2469 int frames_processed; 2470 int scrq_num; 2471 2472 netdev = napi->dev; 2473 adapter = netdev_priv(netdev); 2474 scrq_num = (int)(napi - adapter->napi); 2475 frames_processed = 0; 2476 rx_scrq = adapter->rx_scrq[scrq_num]; 2477 2478 restart_poll: 2479 while (frames_processed < budget) { 2480 struct sk_buff *skb; 2481 struct ibmvnic_rx_buff *rx_buff; 2482 union sub_crq *next; 2483 u32 length; 2484 u16 offset; 2485 u8 flags = 0; 2486 2487 if (unlikely(test_bit(0, &adapter->resetting) && 2488 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2489 enable_scrq_irq(adapter, rx_scrq); 2490 napi_complete_done(napi, frames_processed); 2491 return frames_processed; 2492 } 2493 2494 if (!pending_scrq(adapter, rx_scrq)) 2495 break; 2496 /* The queue entry at the current index is peeked at above 2497 * to determine that there is a valid descriptor awaiting 2498 * processing. We want to be sure that the current slot 2499 * holds a valid descriptor before reading its contents. 2500 */ 2501 dma_rmb(); 2502 next = ibmvnic_next_scrq(adapter, rx_scrq); 2503 rx_buff = 2504 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2505 rx_comp.correlator); 2506 /* do error checking */ 2507 if (next->rx_comp.rc) { 2508 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2509 be16_to_cpu(next->rx_comp.rc)); 2510 /* free the entry */ 2511 next->rx_comp.first = 0; 2512 dev_kfree_skb_any(rx_buff->skb); 2513 remove_buff_from_pool(adapter, rx_buff); 2514 continue; 2515 } else if (!rx_buff->skb) { 2516 /* free the entry */ 2517 next->rx_comp.first = 0; 2518 remove_buff_from_pool(adapter, rx_buff); 2519 continue; 2520 } 2521 2522 length = be32_to_cpu(next->rx_comp.len); 2523 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2524 flags = next->rx_comp.flags; 2525 skb = rx_buff->skb; 2526 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2527 length); 2528 2529 /* VLAN Header has been stripped by the system firmware and 2530 * needs to be inserted by the driver 2531 */ 2532 if (adapter->rx_vlan_header_insertion && 2533 (flags & IBMVNIC_VLAN_STRIPPED)) 2534 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2535 ntohs(next->rx_comp.vlan_tci)); 2536 2537 /* free the entry */ 2538 next->rx_comp.first = 0; 2539 remove_buff_from_pool(adapter, rx_buff); 2540 2541 skb_put(skb, length); 2542 skb->protocol = eth_type_trans(skb, netdev); 2543 skb_record_rx_queue(skb, scrq_num); 2544 2545 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2546 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2547 skb->ip_summed = CHECKSUM_UNNECESSARY; 2548 } 2549 2550 length = skb->len; 2551 napi_gro_receive(napi, skb); /* send it up */ 2552 netdev->stats.rx_packets++; 2553 netdev->stats.rx_bytes += length; 2554 adapter->rx_stats_buffers[scrq_num].packets++; 2555 adapter->rx_stats_buffers[scrq_num].bytes += length; 2556 frames_processed++; 2557 } 2558 2559 if (adapter->state != VNIC_CLOSING && 2560 ((atomic_read(&adapter->rx_pool[scrq_num].available) < 2561 adapter->req_rx_add_entries_per_subcrq / 2) || 2562 frames_processed < budget)) 2563 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2564 if (frames_processed < budget) { 2565 if (napi_complete_done(napi, frames_processed)) { 2566 enable_scrq_irq(adapter, rx_scrq); 2567 if (pending_scrq(adapter, rx_scrq)) { 2568 rmb(); 2569 if (napi_reschedule(napi)) { 2570 disable_scrq_irq(adapter, rx_scrq); 2571 goto restart_poll; 2572 } 2573 } 2574 } 2575 } 2576 return frames_processed; 2577 } 2578 2579 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2580 { 2581 int rc, ret; 2582 2583 adapter->fallback.mtu = adapter->req_mtu; 2584 adapter->fallback.rx_queues = adapter->req_rx_queues; 2585 adapter->fallback.tx_queues = adapter->req_tx_queues; 2586 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2587 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2588 2589 reinit_completion(&adapter->reset_done); 2590 adapter->wait_for_reset = true; 2591 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2592 2593 if (rc) { 2594 ret = rc; 2595 goto out; 2596 } 2597 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2598 if (rc) { 2599 ret = -ENODEV; 2600 goto out; 2601 } 2602 2603 ret = 0; 2604 if (adapter->reset_done_rc) { 2605 ret = -EIO; 2606 adapter->desired.mtu = adapter->fallback.mtu; 2607 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2608 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2609 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2610 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2611 2612 reinit_completion(&adapter->reset_done); 2613 adapter->wait_for_reset = true; 2614 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2615 if (rc) { 2616 ret = rc; 2617 goto out; 2618 } 2619 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2620 60000); 2621 if (rc) { 2622 ret = -ENODEV; 2623 goto out; 2624 } 2625 } 2626 out: 2627 adapter->wait_for_reset = false; 2628 2629 return ret; 2630 } 2631 2632 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2633 { 2634 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2635 2636 adapter->desired.mtu = new_mtu + ETH_HLEN; 2637 2638 return wait_for_reset(adapter); 2639 } 2640 2641 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2642 struct net_device *dev, 2643 netdev_features_t features) 2644 { 2645 /* Some backing hardware adapters can not 2646 * handle packets with a MSS less than 224 2647 * or with only one segment. 2648 */ 2649 if (skb_is_gso(skb)) { 2650 if (skb_shinfo(skb)->gso_size < 224 || 2651 skb_shinfo(skb)->gso_segs == 1) 2652 features &= ~NETIF_F_GSO_MASK; 2653 } 2654 2655 return features; 2656 } 2657 2658 static const struct net_device_ops ibmvnic_netdev_ops = { 2659 .ndo_open = ibmvnic_open, 2660 .ndo_stop = ibmvnic_close, 2661 .ndo_start_xmit = ibmvnic_xmit, 2662 .ndo_set_rx_mode = ibmvnic_set_multi, 2663 .ndo_set_mac_address = ibmvnic_set_mac, 2664 .ndo_validate_addr = eth_validate_addr, 2665 .ndo_tx_timeout = ibmvnic_tx_timeout, 2666 .ndo_change_mtu = ibmvnic_change_mtu, 2667 .ndo_features_check = ibmvnic_features_check, 2668 }; 2669 2670 /* ethtool functions */ 2671 2672 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2673 struct ethtool_link_ksettings *cmd) 2674 { 2675 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2676 int rc; 2677 2678 rc = send_query_phys_parms(adapter); 2679 if (rc) { 2680 adapter->speed = SPEED_UNKNOWN; 2681 adapter->duplex = DUPLEX_UNKNOWN; 2682 } 2683 cmd->base.speed = adapter->speed; 2684 cmd->base.duplex = adapter->duplex; 2685 cmd->base.port = PORT_FIBRE; 2686 cmd->base.phy_address = 0; 2687 cmd->base.autoneg = AUTONEG_ENABLE; 2688 2689 return 0; 2690 } 2691 2692 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2693 struct ethtool_drvinfo *info) 2694 { 2695 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2696 2697 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2698 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2699 strlcpy(info->fw_version, adapter->fw_version, 2700 sizeof(info->fw_version)); 2701 } 2702 2703 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2704 { 2705 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2706 2707 return adapter->msg_enable; 2708 } 2709 2710 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2711 { 2712 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2713 2714 adapter->msg_enable = data; 2715 } 2716 2717 static u32 ibmvnic_get_link(struct net_device *netdev) 2718 { 2719 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2720 2721 /* Don't need to send a query because we request a logical link up at 2722 * init and then we wait for link state indications 2723 */ 2724 return adapter->logical_link_state; 2725 } 2726 2727 static void ibmvnic_get_ringparam(struct net_device *netdev, 2728 struct ethtool_ringparam *ring) 2729 { 2730 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2731 2732 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2733 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2734 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2735 } else { 2736 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2737 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2738 } 2739 ring->rx_mini_max_pending = 0; 2740 ring->rx_jumbo_max_pending = 0; 2741 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2742 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2743 ring->rx_mini_pending = 0; 2744 ring->rx_jumbo_pending = 0; 2745 } 2746 2747 static int ibmvnic_set_ringparam(struct net_device *netdev, 2748 struct ethtool_ringparam *ring) 2749 { 2750 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2751 int ret; 2752 2753 ret = 0; 2754 adapter->desired.rx_entries = ring->rx_pending; 2755 adapter->desired.tx_entries = ring->tx_pending; 2756 2757 ret = wait_for_reset(adapter); 2758 2759 if (!ret && 2760 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2761 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2762 netdev_info(netdev, 2763 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2764 ring->rx_pending, ring->tx_pending, 2765 adapter->req_rx_add_entries_per_subcrq, 2766 adapter->req_tx_entries_per_subcrq); 2767 return ret; 2768 } 2769 2770 static void ibmvnic_get_channels(struct net_device *netdev, 2771 struct ethtool_channels *channels) 2772 { 2773 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2774 2775 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2776 channels->max_rx = adapter->max_rx_queues; 2777 channels->max_tx = adapter->max_tx_queues; 2778 } else { 2779 channels->max_rx = IBMVNIC_MAX_QUEUES; 2780 channels->max_tx = IBMVNIC_MAX_QUEUES; 2781 } 2782 2783 channels->max_other = 0; 2784 channels->max_combined = 0; 2785 channels->rx_count = adapter->req_rx_queues; 2786 channels->tx_count = adapter->req_tx_queues; 2787 channels->other_count = 0; 2788 channels->combined_count = 0; 2789 } 2790 2791 static int ibmvnic_set_channels(struct net_device *netdev, 2792 struct ethtool_channels *channels) 2793 { 2794 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2795 int ret; 2796 2797 ret = 0; 2798 adapter->desired.rx_queues = channels->rx_count; 2799 adapter->desired.tx_queues = channels->tx_count; 2800 2801 ret = wait_for_reset(adapter); 2802 2803 if (!ret && 2804 (adapter->req_rx_queues != channels->rx_count || 2805 adapter->req_tx_queues != channels->tx_count)) 2806 netdev_info(netdev, 2807 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2808 channels->rx_count, channels->tx_count, 2809 adapter->req_rx_queues, adapter->req_tx_queues); 2810 return ret; 2811 2812 } 2813 2814 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2815 { 2816 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2817 int i; 2818 2819 switch (stringset) { 2820 case ETH_SS_STATS: 2821 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2822 i++, data += ETH_GSTRING_LEN) 2823 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2824 2825 for (i = 0; i < adapter->req_tx_queues; i++) { 2826 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2827 data += ETH_GSTRING_LEN; 2828 2829 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2830 data += ETH_GSTRING_LEN; 2831 2832 snprintf(data, ETH_GSTRING_LEN, 2833 "tx%d_dropped_packets", i); 2834 data += ETH_GSTRING_LEN; 2835 } 2836 2837 for (i = 0; i < adapter->req_rx_queues; i++) { 2838 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2839 data += ETH_GSTRING_LEN; 2840 2841 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2842 data += ETH_GSTRING_LEN; 2843 2844 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2845 data += ETH_GSTRING_LEN; 2846 } 2847 break; 2848 2849 case ETH_SS_PRIV_FLAGS: 2850 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2851 strcpy(data + i * ETH_GSTRING_LEN, 2852 ibmvnic_priv_flags[i]); 2853 break; 2854 default: 2855 return; 2856 } 2857 } 2858 2859 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2860 { 2861 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2862 2863 switch (sset) { 2864 case ETH_SS_STATS: 2865 return ARRAY_SIZE(ibmvnic_stats) + 2866 adapter->req_tx_queues * NUM_TX_STATS + 2867 adapter->req_rx_queues * NUM_RX_STATS; 2868 case ETH_SS_PRIV_FLAGS: 2869 return ARRAY_SIZE(ibmvnic_priv_flags); 2870 default: 2871 return -EOPNOTSUPP; 2872 } 2873 } 2874 2875 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2876 struct ethtool_stats *stats, u64 *data) 2877 { 2878 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2879 union ibmvnic_crq crq; 2880 int i, j; 2881 int rc; 2882 2883 memset(&crq, 0, sizeof(crq)); 2884 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2885 crq.request_statistics.cmd = REQUEST_STATISTICS; 2886 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2887 crq.request_statistics.len = 2888 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2889 2890 /* Wait for data to be written */ 2891 reinit_completion(&adapter->stats_done); 2892 rc = ibmvnic_send_crq(adapter, &crq); 2893 if (rc) 2894 return; 2895 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2896 if (rc) 2897 return; 2898 2899 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2900 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2901 ibmvnic_stats[i].offset)); 2902 2903 for (j = 0; j < adapter->req_tx_queues; j++) { 2904 data[i] = adapter->tx_stats_buffers[j].packets; 2905 i++; 2906 data[i] = adapter->tx_stats_buffers[j].bytes; 2907 i++; 2908 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2909 i++; 2910 } 2911 2912 for (j = 0; j < adapter->req_rx_queues; j++) { 2913 data[i] = adapter->rx_stats_buffers[j].packets; 2914 i++; 2915 data[i] = adapter->rx_stats_buffers[j].bytes; 2916 i++; 2917 data[i] = adapter->rx_stats_buffers[j].interrupts; 2918 i++; 2919 } 2920 } 2921 2922 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2923 { 2924 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2925 2926 return adapter->priv_flags; 2927 } 2928 2929 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2930 { 2931 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2932 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2933 2934 if (which_maxes) 2935 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2936 else 2937 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2938 2939 return 0; 2940 } 2941 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2942 .get_drvinfo = ibmvnic_get_drvinfo, 2943 .get_msglevel = ibmvnic_get_msglevel, 2944 .set_msglevel = ibmvnic_set_msglevel, 2945 .get_link = ibmvnic_get_link, 2946 .get_ringparam = ibmvnic_get_ringparam, 2947 .set_ringparam = ibmvnic_set_ringparam, 2948 .get_channels = ibmvnic_get_channels, 2949 .set_channels = ibmvnic_set_channels, 2950 .get_strings = ibmvnic_get_strings, 2951 .get_sset_count = ibmvnic_get_sset_count, 2952 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2953 .get_link_ksettings = ibmvnic_get_link_ksettings, 2954 .get_priv_flags = ibmvnic_get_priv_flags, 2955 .set_priv_flags = ibmvnic_set_priv_flags, 2956 }; 2957 2958 /* Routines for managing CRQs/sCRQs */ 2959 2960 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2961 struct ibmvnic_sub_crq_queue *scrq) 2962 { 2963 int rc; 2964 2965 if (!scrq) { 2966 netdev_dbg(adapter->netdev, 2967 "Invalid scrq reset. irq (%d) or msgs (%p).\n", 2968 scrq->irq, scrq->msgs); 2969 return -EINVAL; 2970 } 2971 2972 if (scrq->irq) { 2973 free_irq(scrq->irq, scrq); 2974 irq_dispose_mapping(scrq->irq); 2975 scrq->irq = 0; 2976 } 2977 2978 if (scrq->msgs) { 2979 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2980 atomic_set(&scrq->used, 0); 2981 scrq->cur = 0; 2982 scrq->ind_buf.index = 0; 2983 } else { 2984 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 2985 return -EINVAL; 2986 } 2987 2988 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2989 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2990 return rc; 2991 } 2992 2993 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2994 { 2995 int i, rc; 2996 2997 if (!adapter->tx_scrq || !adapter->rx_scrq) 2998 return -EINVAL; 2999 3000 for (i = 0; i < adapter->req_tx_queues; i++) { 3001 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3002 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3003 if (rc) 3004 return rc; 3005 } 3006 3007 for (i = 0; i < adapter->req_rx_queues; i++) { 3008 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3009 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3010 if (rc) 3011 return rc; 3012 } 3013 3014 return rc; 3015 } 3016 3017 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3018 struct ibmvnic_sub_crq_queue *scrq, 3019 bool do_h_free) 3020 { 3021 struct device *dev = &adapter->vdev->dev; 3022 long rc; 3023 3024 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3025 3026 if (do_h_free) { 3027 /* Close the sub-crqs */ 3028 do { 3029 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3030 adapter->vdev->unit_address, 3031 scrq->crq_num); 3032 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3033 3034 if (rc) { 3035 netdev_err(adapter->netdev, 3036 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3037 scrq->crq_num, rc); 3038 } 3039 } 3040 3041 dma_free_coherent(dev, 3042 IBMVNIC_IND_ARR_SZ, 3043 scrq->ind_buf.indir_arr, 3044 scrq->ind_buf.indir_dma); 3045 3046 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3047 DMA_BIDIRECTIONAL); 3048 free_pages((unsigned long)scrq->msgs, 2); 3049 kfree(scrq); 3050 } 3051 3052 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 3053 *adapter) 3054 { 3055 struct device *dev = &adapter->vdev->dev; 3056 struct ibmvnic_sub_crq_queue *scrq; 3057 int rc; 3058 3059 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 3060 if (!scrq) 3061 return NULL; 3062 3063 scrq->msgs = 3064 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 3065 if (!scrq->msgs) { 3066 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 3067 goto zero_page_failed; 3068 } 3069 3070 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 3071 DMA_BIDIRECTIONAL); 3072 if (dma_mapping_error(dev, scrq->msg_token)) { 3073 dev_warn(dev, "Couldn't map crq queue messages page\n"); 3074 goto map_failed; 3075 } 3076 3077 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3078 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3079 3080 if (rc == H_RESOURCE) 3081 rc = ibmvnic_reset_crq(adapter); 3082 3083 if (rc == H_CLOSED) { 3084 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 3085 } else if (rc) { 3086 dev_warn(dev, "Error %d registering sub-crq\n", rc); 3087 goto reg_failed; 3088 } 3089 3090 scrq->adapter = adapter; 3091 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 3092 scrq->ind_buf.index = 0; 3093 3094 scrq->ind_buf.indir_arr = 3095 dma_alloc_coherent(dev, 3096 IBMVNIC_IND_ARR_SZ, 3097 &scrq->ind_buf.indir_dma, 3098 GFP_KERNEL); 3099 3100 if (!scrq->ind_buf.indir_arr) 3101 goto indir_failed; 3102 3103 spin_lock_init(&scrq->lock); 3104 3105 netdev_dbg(adapter->netdev, 3106 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 3107 scrq->crq_num, scrq->hw_irq, scrq->irq); 3108 3109 return scrq; 3110 3111 indir_failed: 3112 do { 3113 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3114 adapter->vdev->unit_address, 3115 scrq->crq_num); 3116 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 3117 reg_failed: 3118 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3119 DMA_BIDIRECTIONAL); 3120 map_failed: 3121 free_pages((unsigned long)scrq->msgs, 2); 3122 zero_page_failed: 3123 kfree(scrq); 3124 3125 return NULL; 3126 } 3127 3128 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 3129 { 3130 int i; 3131 3132 if (adapter->tx_scrq) { 3133 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 3134 if (!adapter->tx_scrq[i]) 3135 continue; 3136 3137 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3138 i); 3139 if (adapter->tx_scrq[i]->irq) { 3140 free_irq(adapter->tx_scrq[i]->irq, 3141 adapter->tx_scrq[i]); 3142 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3143 adapter->tx_scrq[i]->irq = 0; 3144 } 3145 3146 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3147 do_h_free); 3148 } 3149 3150 kfree(adapter->tx_scrq); 3151 adapter->tx_scrq = NULL; 3152 adapter->num_active_tx_scrqs = 0; 3153 } 3154 3155 if (adapter->rx_scrq) { 3156 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3157 if (!adapter->rx_scrq[i]) 3158 continue; 3159 3160 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3161 i); 3162 if (adapter->rx_scrq[i]->irq) { 3163 free_irq(adapter->rx_scrq[i]->irq, 3164 adapter->rx_scrq[i]); 3165 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3166 adapter->rx_scrq[i]->irq = 0; 3167 } 3168 3169 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3170 do_h_free); 3171 } 3172 3173 kfree(adapter->rx_scrq); 3174 adapter->rx_scrq = NULL; 3175 adapter->num_active_rx_scrqs = 0; 3176 } 3177 } 3178 3179 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3180 struct ibmvnic_sub_crq_queue *scrq) 3181 { 3182 struct device *dev = &adapter->vdev->dev; 3183 unsigned long rc; 3184 3185 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3186 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3187 if (rc) 3188 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3189 scrq->hw_irq, rc); 3190 return rc; 3191 } 3192 3193 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3194 struct ibmvnic_sub_crq_queue *scrq) 3195 { 3196 struct device *dev = &adapter->vdev->dev; 3197 unsigned long rc; 3198 3199 if (scrq->hw_irq > 0x100000000ULL) { 3200 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3201 return 1; 3202 } 3203 3204 if (test_bit(0, &adapter->resetting) && 3205 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3206 u64 val = (0xff000000) | scrq->hw_irq; 3207 3208 rc = plpar_hcall_norets(H_EOI, val); 3209 /* H_EOI would fail with rc = H_FUNCTION when running 3210 * in XIVE mode which is expected, but not an error. 3211 */ 3212 if (rc && (rc != H_FUNCTION)) 3213 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3214 val, rc); 3215 } 3216 3217 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3218 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3219 if (rc) 3220 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3221 scrq->hw_irq, rc); 3222 return rc; 3223 } 3224 3225 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3226 struct ibmvnic_sub_crq_queue *scrq) 3227 { 3228 struct device *dev = &adapter->vdev->dev; 3229 struct ibmvnic_tx_pool *tx_pool; 3230 struct ibmvnic_tx_buff *txbuff; 3231 struct netdev_queue *txq; 3232 union sub_crq *next; 3233 int index; 3234 int i; 3235 3236 restart_loop: 3237 while (pending_scrq(adapter, scrq)) { 3238 unsigned int pool = scrq->pool_index; 3239 int num_entries = 0; 3240 int total_bytes = 0; 3241 int num_packets = 0; 3242 3243 /* The queue entry at the current index is peeked at above 3244 * to determine that there is a valid descriptor awaiting 3245 * processing. We want to be sure that the current slot 3246 * holds a valid descriptor before reading its contents. 3247 */ 3248 dma_rmb(); 3249 3250 next = ibmvnic_next_scrq(adapter, scrq); 3251 for (i = 0; i < next->tx_comp.num_comps; i++) { 3252 if (next->tx_comp.rcs[i]) 3253 dev_err(dev, "tx error %x\n", 3254 next->tx_comp.rcs[i]); 3255 index = be32_to_cpu(next->tx_comp.correlators[i]); 3256 if (index & IBMVNIC_TSO_POOL_MASK) { 3257 tx_pool = &adapter->tso_pool[pool]; 3258 index &= ~IBMVNIC_TSO_POOL_MASK; 3259 } else { 3260 tx_pool = &adapter->tx_pool[pool]; 3261 } 3262 3263 txbuff = &tx_pool->tx_buff[index]; 3264 num_packets++; 3265 num_entries += txbuff->num_entries; 3266 if (txbuff->skb) { 3267 total_bytes += txbuff->skb->len; 3268 dev_consume_skb_irq(txbuff->skb); 3269 txbuff->skb = NULL; 3270 } else { 3271 netdev_warn(adapter->netdev, 3272 "TX completion received with NULL socket buffer\n"); 3273 } 3274 tx_pool->free_map[tx_pool->producer_index] = index; 3275 tx_pool->producer_index = 3276 (tx_pool->producer_index + 1) % 3277 tx_pool->num_buffers; 3278 } 3279 /* remove tx_comp scrq*/ 3280 next->tx_comp.first = 0; 3281 3282 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 3283 netdev_tx_completed_queue(txq, num_packets, total_bytes); 3284 3285 if (atomic_sub_return(num_entries, &scrq->used) <= 3286 (adapter->req_tx_entries_per_subcrq / 2) && 3287 __netif_subqueue_stopped(adapter->netdev, 3288 scrq->pool_index)) { 3289 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3290 netdev_dbg(adapter->netdev, "Started queue %d\n", 3291 scrq->pool_index); 3292 } 3293 } 3294 3295 enable_scrq_irq(adapter, scrq); 3296 3297 if (pending_scrq(adapter, scrq)) { 3298 disable_scrq_irq(adapter, scrq); 3299 goto restart_loop; 3300 } 3301 3302 return 0; 3303 } 3304 3305 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3306 { 3307 struct ibmvnic_sub_crq_queue *scrq = instance; 3308 struct ibmvnic_adapter *adapter = scrq->adapter; 3309 3310 disable_scrq_irq(adapter, scrq); 3311 ibmvnic_complete_tx(adapter, scrq); 3312 3313 return IRQ_HANDLED; 3314 } 3315 3316 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3317 { 3318 struct ibmvnic_sub_crq_queue *scrq = instance; 3319 struct ibmvnic_adapter *adapter = scrq->adapter; 3320 3321 /* When booting a kdump kernel we can hit pending interrupts 3322 * prior to completing driver initialization. 3323 */ 3324 if (unlikely(adapter->state != VNIC_OPEN)) 3325 return IRQ_NONE; 3326 3327 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3328 3329 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3330 disable_scrq_irq(adapter, scrq); 3331 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3332 } 3333 3334 return IRQ_HANDLED; 3335 } 3336 3337 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3338 { 3339 struct device *dev = &adapter->vdev->dev; 3340 struct ibmvnic_sub_crq_queue *scrq; 3341 int i = 0, j = 0; 3342 int rc = 0; 3343 3344 for (i = 0; i < adapter->req_tx_queues; i++) { 3345 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3346 i); 3347 scrq = adapter->tx_scrq[i]; 3348 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3349 3350 if (!scrq->irq) { 3351 rc = -EINVAL; 3352 dev_err(dev, "Error mapping irq\n"); 3353 goto req_tx_irq_failed; 3354 } 3355 3356 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3357 adapter->vdev->unit_address, i); 3358 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3359 0, scrq->name, scrq); 3360 3361 if (rc) { 3362 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3363 scrq->irq, rc); 3364 irq_dispose_mapping(scrq->irq); 3365 goto req_tx_irq_failed; 3366 } 3367 } 3368 3369 for (i = 0; i < adapter->req_rx_queues; i++) { 3370 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3371 i); 3372 scrq = adapter->rx_scrq[i]; 3373 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3374 if (!scrq->irq) { 3375 rc = -EINVAL; 3376 dev_err(dev, "Error mapping irq\n"); 3377 goto req_rx_irq_failed; 3378 } 3379 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3380 adapter->vdev->unit_address, i); 3381 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3382 0, scrq->name, scrq); 3383 if (rc) { 3384 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3385 scrq->irq, rc); 3386 irq_dispose_mapping(scrq->irq); 3387 goto req_rx_irq_failed; 3388 } 3389 } 3390 return rc; 3391 3392 req_rx_irq_failed: 3393 for (j = 0; j < i; j++) { 3394 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3395 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3396 } 3397 i = adapter->req_tx_queues; 3398 req_tx_irq_failed: 3399 for (j = 0; j < i; j++) { 3400 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3401 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3402 } 3403 release_sub_crqs(adapter, 1); 3404 return rc; 3405 } 3406 3407 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3408 { 3409 struct device *dev = &adapter->vdev->dev; 3410 struct ibmvnic_sub_crq_queue **allqueues; 3411 int registered_queues = 0; 3412 int total_queues; 3413 int more = 0; 3414 int i; 3415 3416 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3417 3418 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3419 if (!allqueues) 3420 return -1; 3421 3422 for (i = 0; i < total_queues; i++) { 3423 allqueues[i] = init_sub_crq_queue(adapter); 3424 if (!allqueues[i]) { 3425 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3426 break; 3427 } 3428 registered_queues++; 3429 } 3430 3431 /* Make sure we were able to register the minimum number of queues */ 3432 if (registered_queues < 3433 adapter->min_tx_queues + adapter->min_rx_queues) { 3434 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3435 goto tx_failed; 3436 } 3437 3438 /* Distribute the failed allocated queues*/ 3439 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3440 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3441 switch (i % 3) { 3442 case 0: 3443 if (adapter->req_rx_queues > adapter->min_rx_queues) 3444 adapter->req_rx_queues--; 3445 else 3446 more++; 3447 break; 3448 case 1: 3449 if (adapter->req_tx_queues > adapter->min_tx_queues) 3450 adapter->req_tx_queues--; 3451 else 3452 more++; 3453 break; 3454 } 3455 } 3456 3457 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3458 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3459 if (!adapter->tx_scrq) 3460 goto tx_failed; 3461 3462 for (i = 0; i < adapter->req_tx_queues; i++) { 3463 adapter->tx_scrq[i] = allqueues[i]; 3464 adapter->tx_scrq[i]->pool_index = i; 3465 adapter->num_active_tx_scrqs++; 3466 } 3467 3468 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3469 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3470 if (!adapter->rx_scrq) 3471 goto rx_failed; 3472 3473 for (i = 0; i < adapter->req_rx_queues; i++) { 3474 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3475 adapter->rx_scrq[i]->scrq_num = i; 3476 adapter->num_active_rx_scrqs++; 3477 } 3478 3479 kfree(allqueues); 3480 return 0; 3481 3482 rx_failed: 3483 kfree(adapter->tx_scrq); 3484 adapter->tx_scrq = NULL; 3485 tx_failed: 3486 for (i = 0; i < registered_queues; i++) 3487 release_sub_crq_queue(adapter, allqueues[i], 1); 3488 kfree(allqueues); 3489 return -1; 3490 } 3491 3492 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3493 { 3494 struct device *dev = &adapter->vdev->dev; 3495 union ibmvnic_crq crq; 3496 int max_entries; 3497 3498 if (!retry) { 3499 /* Sub-CRQ entries are 32 byte long */ 3500 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3501 3502 if (adapter->min_tx_entries_per_subcrq > entries_page || 3503 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3504 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3505 return; 3506 } 3507 3508 if (adapter->desired.mtu) 3509 adapter->req_mtu = adapter->desired.mtu; 3510 else 3511 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3512 3513 if (!adapter->desired.tx_entries) 3514 adapter->desired.tx_entries = 3515 adapter->max_tx_entries_per_subcrq; 3516 if (!adapter->desired.rx_entries) 3517 adapter->desired.rx_entries = 3518 adapter->max_rx_add_entries_per_subcrq; 3519 3520 max_entries = IBMVNIC_MAX_LTB_SIZE / 3521 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3522 3523 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3524 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3525 adapter->desired.tx_entries = max_entries; 3526 } 3527 3528 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3529 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3530 adapter->desired.rx_entries = max_entries; 3531 } 3532 3533 if (adapter->desired.tx_entries) 3534 adapter->req_tx_entries_per_subcrq = 3535 adapter->desired.tx_entries; 3536 else 3537 adapter->req_tx_entries_per_subcrq = 3538 adapter->max_tx_entries_per_subcrq; 3539 3540 if (adapter->desired.rx_entries) 3541 adapter->req_rx_add_entries_per_subcrq = 3542 adapter->desired.rx_entries; 3543 else 3544 adapter->req_rx_add_entries_per_subcrq = 3545 adapter->max_rx_add_entries_per_subcrq; 3546 3547 if (adapter->desired.tx_queues) 3548 adapter->req_tx_queues = 3549 adapter->desired.tx_queues; 3550 else 3551 adapter->req_tx_queues = 3552 adapter->opt_tx_comp_sub_queues; 3553 3554 if (adapter->desired.rx_queues) 3555 adapter->req_rx_queues = 3556 adapter->desired.rx_queues; 3557 else 3558 adapter->req_rx_queues = 3559 adapter->opt_rx_comp_queues; 3560 3561 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3562 } 3563 3564 memset(&crq, 0, sizeof(crq)); 3565 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3566 crq.request_capability.cmd = REQUEST_CAPABILITY; 3567 3568 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3569 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3570 atomic_inc(&adapter->running_cap_crqs); 3571 ibmvnic_send_crq(adapter, &crq); 3572 3573 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3574 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3575 atomic_inc(&adapter->running_cap_crqs); 3576 ibmvnic_send_crq(adapter, &crq); 3577 3578 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3579 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3580 atomic_inc(&adapter->running_cap_crqs); 3581 ibmvnic_send_crq(adapter, &crq); 3582 3583 crq.request_capability.capability = 3584 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3585 crq.request_capability.number = 3586 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3587 atomic_inc(&adapter->running_cap_crqs); 3588 ibmvnic_send_crq(adapter, &crq); 3589 3590 crq.request_capability.capability = 3591 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3592 crq.request_capability.number = 3593 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3594 atomic_inc(&adapter->running_cap_crqs); 3595 ibmvnic_send_crq(adapter, &crq); 3596 3597 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3598 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3599 atomic_inc(&adapter->running_cap_crqs); 3600 ibmvnic_send_crq(adapter, &crq); 3601 3602 if (adapter->netdev->flags & IFF_PROMISC) { 3603 if (adapter->promisc_supported) { 3604 crq.request_capability.capability = 3605 cpu_to_be16(PROMISC_REQUESTED); 3606 crq.request_capability.number = cpu_to_be64(1); 3607 atomic_inc(&adapter->running_cap_crqs); 3608 ibmvnic_send_crq(adapter, &crq); 3609 } 3610 } else { 3611 crq.request_capability.capability = 3612 cpu_to_be16(PROMISC_REQUESTED); 3613 crq.request_capability.number = cpu_to_be64(0); 3614 atomic_inc(&adapter->running_cap_crqs); 3615 ibmvnic_send_crq(adapter, &crq); 3616 } 3617 } 3618 3619 static int pending_scrq(struct ibmvnic_adapter *adapter, 3620 struct ibmvnic_sub_crq_queue *scrq) 3621 { 3622 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3623 3624 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3625 return 1; 3626 else 3627 return 0; 3628 } 3629 3630 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3631 struct ibmvnic_sub_crq_queue *scrq) 3632 { 3633 union sub_crq *entry; 3634 unsigned long flags; 3635 3636 spin_lock_irqsave(&scrq->lock, flags); 3637 entry = &scrq->msgs[scrq->cur]; 3638 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3639 if (++scrq->cur == scrq->size) 3640 scrq->cur = 0; 3641 } else { 3642 entry = NULL; 3643 } 3644 spin_unlock_irqrestore(&scrq->lock, flags); 3645 3646 /* Ensure that the entire buffer descriptor has been 3647 * loaded before reading its contents 3648 */ 3649 dma_rmb(); 3650 3651 return entry; 3652 } 3653 3654 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3655 { 3656 struct ibmvnic_crq_queue *queue = &adapter->crq; 3657 union ibmvnic_crq *crq; 3658 3659 crq = &queue->msgs[queue->cur]; 3660 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3661 if (++queue->cur == queue->size) 3662 queue->cur = 0; 3663 } else { 3664 crq = NULL; 3665 } 3666 3667 return crq; 3668 } 3669 3670 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3671 { 3672 switch (rc) { 3673 case H_PARAMETER: 3674 dev_warn_ratelimited(dev, 3675 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3676 func, rc); 3677 break; 3678 case H_CLOSED: 3679 dev_warn_ratelimited(dev, 3680 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3681 func, rc); 3682 break; 3683 default: 3684 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3685 break; 3686 } 3687 } 3688 3689 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3690 u64 remote_handle, u64 ioba, u64 num_entries) 3691 { 3692 unsigned int ua = adapter->vdev->unit_address; 3693 struct device *dev = &adapter->vdev->dev; 3694 int rc; 3695 3696 /* Make sure the hypervisor sees the complete request */ 3697 mb(); 3698 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3699 cpu_to_be64(remote_handle), 3700 ioba, num_entries); 3701 3702 if (rc) 3703 print_subcrq_error(dev, rc, __func__); 3704 3705 return rc; 3706 } 3707 3708 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3709 union ibmvnic_crq *crq) 3710 { 3711 unsigned int ua = adapter->vdev->unit_address; 3712 struct device *dev = &adapter->vdev->dev; 3713 u64 *u64_crq = (u64 *)crq; 3714 int rc; 3715 3716 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3717 (unsigned long int)cpu_to_be64(u64_crq[0]), 3718 (unsigned long int)cpu_to_be64(u64_crq[1])); 3719 3720 if (!adapter->crq.active && 3721 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3722 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3723 return -EINVAL; 3724 } 3725 3726 /* Make sure the hypervisor sees the complete request */ 3727 mb(); 3728 3729 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3730 cpu_to_be64(u64_crq[0]), 3731 cpu_to_be64(u64_crq[1])); 3732 3733 if (rc) { 3734 if (rc == H_CLOSED) { 3735 dev_warn(dev, "CRQ Queue closed\n"); 3736 /* do not reset, report the fail, wait for passive init from server */ 3737 } 3738 3739 dev_warn(dev, "Send error (rc=%d)\n", rc); 3740 } 3741 3742 return rc; 3743 } 3744 3745 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3746 { 3747 struct device *dev = &adapter->vdev->dev; 3748 union ibmvnic_crq crq; 3749 int retries = 100; 3750 int rc; 3751 3752 memset(&crq, 0, sizeof(crq)); 3753 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3754 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3755 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3756 3757 do { 3758 rc = ibmvnic_send_crq(adapter, &crq); 3759 if (rc != H_CLOSED) 3760 break; 3761 retries--; 3762 msleep(50); 3763 3764 } while (retries > 0); 3765 3766 if (rc) { 3767 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3768 return rc; 3769 } 3770 3771 return 0; 3772 } 3773 3774 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3775 { 3776 union ibmvnic_crq crq; 3777 3778 memset(&crq, 0, sizeof(crq)); 3779 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3780 crq.version_exchange.cmd = VERSION_EXCHANGE; 3781 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3782 3783 return ibmvnic_send_crq(adapter, &crq); 3784 } 3785 3786 struct vnic_login_client_data { 3787 u8 type; 3788 __be16 len; 3789 char name[]; 3790 } __packed; 3791 3792 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3793 { 3794 int len; 3795 3796 /* Calculate the amount of buffer space needed for the 3797 * vnic client data in the login buffer. There are four entries, 3798 * OS name, LPAR name, device name, and a null last entry. 3799 */ 3800 len = 4 * sizeof(struct vnic_login_client_data); 3801 len += 6; /* "Linux" plus NULL */ 3802 len += strlen(utsname()->nodename) + 1; 3803 len += strlen(adapter->netdev->name) + 1; 3804 3805 return len; 3806 } 3807 3808 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3809 struct vnic_login_client_data *vlcd) 3810 { 3811 const char *os_name = "Linux"; 3812 int len; 3813 3814 /* Type 1 - LPAR OS */ 3815 vlcd->type = 1; 3816 len = strlen(os_name) + 1; 3817 vlcd->len = cpu_to_be16(len); 3818 strncpy(vlcd->name, os_name, len); 3819 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3820 3821 /* Type 2 - LPAR name */ 3822 vlcd->type = 2; 3823 len = strlen(utsname()->nodename) + 1; 3824 vlcd->len = cpu_to_be16(len); 3825 strncpy(vlcd->name, utsname()->nodename, len); 3826 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3827 3828 /* Type 3 - device name */ 3829 vlcd->type = 3; 3830 len = strlen(adapter->netdev->name) + 1; 3831 vlcd->len = cpu_to_be16(len); 3832 strncpy(vlcd->name, adapter->netdev->name, len); 3833 } 3834 3835 static int send_login(struct ibmvnic_adapter *adapter) 3836 { 3837 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3838 struct ibmvnic_login_buffer *login_buffer; 3839 struct device *dev = &adapter->vdev->dev; 3840 struct vnic_login_client_data *vlcd; 3841 dma_addr_t rsp_buffer_token; 3842 dma_addr_t buffer_token; 3843 size_t rsp_buffer_size; 3844 union ibmvnic_crq crq; 3845 int client_data_len; 3846 size_t buffer_size; 3847 __be64 *tx_list_p; 3848 __be64 *rx_list_p; 3849 int rc; 3850 int i; 3851 3852 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3853 netdev_err(adapter->netdev, 3854 "RX or TX queues are not allocated, device login failed\n"); 3855 return -1; 3856 } 3857 3858 release_login_rsp_buffer(adapter); 3859 client_data_len = vnic_client_data_len(adapter); 3860 3861 buffer_size = 3862 sizeof(struct ibmvnic_login_buffer) + 3863 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3864 client_data_len; 3865 3866 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3867 if (!login_buffer) 3868 goto buf_alloc_failed; 3869 3870 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3871 DMA_TO_DEVICE); 3872 if (dma_mapping_error(dev, buffer_token)) { 3873 dev_err(dev, "Couldn't map login buffer\n"); 3874 goto buf_map_failed; 3875 } 3876 3877 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3878 sizeof(u64) * adapter->req_tx_queues + 3879 sizeof(u64) * adapter->req_rx_queues + 3880 sizeof(u64) * adapter->req_rx_queues + 3881 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3882 3883 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3884 if (!login_rsp_buffer) 3885 goto buf_rsp_alloc_failed; 3886 3887 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3888 rsp_buffer_size, DMA_FROM_DEVICE); 3889 if (dma_mapping_error(dev, rsp_buffer_token)) { 3890 dev_err(dev, "Couldn't map login rsp buffer\n"); 3891 goto buf_rsp_map_failed; 3892 } 3893 3894 adapter->login_buf = login_buffer; 3895 adapter->login_buf_token = buffer_token; 3896 adapter->login_buf_sz = buffer_size; 3897 adapter->login_rsp_buf = login_rsp_buffer; 3898 adapter->login_rsp_buf_token = rsp_buffer_token; 3899 adapter->login_rsp_buf_sz = rsp_buffer_size; 3900 3901 login_buffer->len = cpu_to_be32(buffer_size); 3902 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3903 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3904 login_buffer->off_txcomp_subcrqs = 3905 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3906 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3907 login_buffer->off_rxcomp_subcrqs = 3908 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3909 sizeof(u64) * adapter->req_tx_queues); 3910 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3911 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3912 3913 tx_list_p = (__be64 *)((char *)login_buffer + 3914 sizeof(struct ibmvnic_login_buffer)); 3915 rx_list_p = (__be64 *)((char *)login_buffer + 3916 sizeof(struct ibmvnic_login_buffer) + 3917 sizeof(u64) * adapter->req_tx_queues); 3918 3919 for (i = 0; i < adapter->req_tx_queues; i++) { 3920 if (adapter->tx_scrq[i]) { 3921 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3922 crq_num); 3923 } 3924 } 3925 3926 for (i = 0; i < adapter->req_rx_queues; i++) { 3927 if (adapter->rx_scrq[i]) { 3928 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3929 crq_num); 3930 } 3931 } 3932 3933 /* Insert vNIC login client data */ 3934 vlcd = (struct vnic_login_client_data *) 3935 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3936 login_buffer->client_data_offset = 3937 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3938 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3939 3940 vnic_add_client_data(adapter, vlcd); 3941 3942 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3943 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3944 netdev_dbg(adapter->netdev, "%016lx\n", 3945 ((unsigned long int *)(adapter->login_buf))[i]); 3946 } 3947 3948 memset(&crq, 0, sizeof(crq)); 3949 crq.login.first = IBMVNIC_CRQ_CMD; 3950 crq.login.cmd = LOGIN; 3951 crq.login.ioba = cpu_to_be32(buffer_token); 3952 crq.login.len = cpu_to_be32(buffer_size); 3953 3954 adapter->login_pending = true; 3955 rc = ibmvnic_send_crq(adapter, &crq); 3956 if (rc) { 3957 adapter->login_pending = false; 3958 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 3959 goto buf_rsp_map_failed; 3960 } 3961 3962 return 0; 3963 3964 buf_rsp_map_failed: 3965 kfree(login_rsp_buffer); 3966 adapter->login_rsp_buf = NULL; 3967 buf_rsp_alloc_failed: 3968 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3969 buf_map_failed: 3970 kfree(login_buffer); 3971 adapter->login_buf = NULL; 3972 buf_alloc_failed: 3973 return -1; 3974 } 3975 3976 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3977 u32 len, u8 map_id) 3978 { 3979 union ibmvnic_crq crq; 3980 3981 memset(&crq, 0, sizeof(crq)); 3982 crq.request_map.first = IBMVNIC_CRQ_CMD; 3983 crq.request_map.cmd = REQUEST_MAP; 3984 crq.request_map.map_id = map_id; 3985 crq.request_map.ioba = cpu_to_be32(addr); 3986 crq.request_map.len = cpu_to_be32(len); 3987 return ibmvnic_send_crq(adapter, &crq); 3988 } 3989 3990 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3991 { 3992 union ibmvnic_crq crq; 3993 3994 memset(&crq, 0, sizeof(crq)); 3995 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3996 crq.request_unmap.cmd = REQUEST_UNMAP; 3997 crq.request_unmap.map_id = map_id; 3998 return ibmvnic_send_crq(adapter, &crq); 3999 } 4000 4001 static void send_query_map(struct ibmvnic_adapter *adapter) 4002 { 4003 union ibmvnic_crq crq; 4004 4005 memset(&crq, 0, sizeof(crq)); 4006 crq.query_map.first = IBMVNIC_CRQ_CMD; 4007 crq.query_map.cmd = QUERY_MAP; 4008 ibmvnic_send_crq(adapter, &crq); 4009 } 4010 4011 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 4012 static void send_query_cap(struct ibmvnic_adapter *adapter) 4013 { 4014 union ibmvnic_crq crq; 4015 4016 atomic_set(&adapter->running_cap_crqs, 0); 4017 memset(&crq, 0, sizeof(crq)); 4018 crq.query_capability.first = IBMVNIC_CRQ_CMD; 4019 crq.query_capability.cmd = QUERY_CAPABILITY; 4020 4021 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 4022 atomic_inc(&adapter->running_cap_crqs); 4023 ibmvnic_send_crq(adapter, &crq); 4024 4025 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 4026 atomic_inc(&adapter->running_cap_crqs); 4027 ibmvnic_send_crq(adapter, &crq); 4028 4029 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 4030 atomic_inc(&adapter->running_cap_crqs); 4031 ibmvnic_send_crq(adapter, &crq); 4032 4033 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 4034 atomic_inc(&adapter->running_cap_crqs); 4035 ibmvnic_send_crq(adapter, &crq); 4036 4037 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 4038 atomic_inc(&adapter->running_cap_crqs); 4039 ibmvnic_send_crq(adapter, &crq); 4040 4041 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 4042 atomic_inc(&adapter->running_cap_crqs); 4043 ibmvnic_send_crq(adapter, &crq); 4044 4045 crq.query_capability.capability = 4046 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 4047 atomic_inc(&adapter->running_cap_crqs); 4048 ibmvnic_send_crq(adapter, &crq); 4049 4050 crq.query_capability.capability = 4051 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 4052 atomic_inc(&adapter->running_cap_crqs); 4053 ibmvnic_send_crq(adapter, &crq); 4054 4055 crq.query_capability.capability = 4056 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 4057 atomic_inc(&adapter->running_cap_crqs); 4058 ibmvnic_send_crq(adapter, &crq); 4059 4060 crq.query_capability.capability = 4061 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 4062 atomic_inc(&adapter->running_cap_crqs); 4063 ibmvnic_send_crq(adapter, &crq); 4064 4065 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 4066 atomic_inc(&adapter->running_cap_crqs); 4067 ibmvnic_send_crq(adapter, &crq); 4068 4069 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 4070 atomic_inc(&adapter->running_cap_crqs); 4071 ibmvnic_send_crq(adapter, &crq); 4072 4073 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 4074 atomic_inc(&adapter->running_cap_crqs); 4075 ibmvnic_send_crq(adapter, &crq); 4076 4077 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 4078 atomic_inc(&adapter->running_cap_crqs); 4079 ibmvnic_send_crq(adapter, &crq); 4080 4081 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 4082 atomic_inc(&adapter->running_cap_crqs); 4083 ibmvnic_send_crq(adapter, &crq); 4084 4085 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 4086 atomic_inc(&adapter->running_cap_crqs); 4087 ibmvnic_send_crq(adapter, &crq); 4088 4089 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 4090 atomic_inc(&adapter->running_cap_crqs); 4091 ibmvnic_send_crq(adapter, &crq); 4092 4093 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 4094 atomic_inc(&adapter->running_cap_crqs); 4095 ibmvnic_send_crq(adapter, &crq); 4096 4097 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 4098 atomic_inc(&adapter->running_cap_crqs); 4099 ibmvnic_send_crq(adapter, &crq); 4100 4101 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 4102 atomic_inc(&adapter->running_cap_crqs); 4103 ibmvnic_send_crq(adapter, &crq); 4104 4105 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 4106 atomic_inc(&adapter->running_cap_crqs); 4107 ibmvnic_send_crq(adapter, &crq); 4108 4109 crq.query_capability.capability = 4110 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 4111 atomic_inc(&adapter->running_cap_crqs); 4112 ibmvnic_send_crq(adapter, &crq); 4113 4114 crq.query_capability.capability = 4115 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 4116 atomic_inc(&adapter->running_cap_crqs); 4117 ibmvnic_send_crq(adapter, &crq); 4118 4119 crq.query_capability.capability = 4120 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 4121 atomic_inc(&adapter->running_cap_crqs); 4122 ibmvnic_send_crq(adapter, &crq); 4123 4124 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 4125 atomic_inc(&adapter->running_cap_crqs); 4126 ibmvnic_send_crq(adapter, &crq); 4127 } 4128 4129 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4130 { 4131 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4132 struct device *dev = &adapter->vdev->dev; 4133 union ibmvnic_crq crq; 4134 4135 adapter->ip_offload_tok = 4136 dma_map_single(dev, 4137 &adapter->ip_offload_buf, 4138 buf_sz, 4139 DMA_FROM_DEVICE); 4140 4141 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4142 if (!firmware_has_feature(FW_FEATURE_CMO)) 4143 dev_err(dev, "Couldn't map offload buffer\n"); 4144 return; 4145 } 4146 4147 memset(&crq, 0, sizeof(crq)); 4148 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4149 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4150 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4151 crq.query_ip_offload.ioba = 4152 cpu_to_be32(adapter->ip_offload_tok); 4153 4154 ibmvnic_send_crq(adapter, &crq); 4155 } 4156 4157 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4158 { 4159 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4160 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4161 struct device *dev = &adapter->vdev->dev; 4162 netdev_features_t old_hw_features = 0; 4163 union ibmvnic_crq crq; 4164 4165 adapter->ip_offload_ctrl_tok = 4166 dma_map_single(dev, 4167 ctrl_buf, 4168 sizeof(adapter->ip_offload_ctrl), 4169 DMA_TO_DEVICE); 4170 4171 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4172 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4173 return; 4174 } 4175 4176 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4177 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4178 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4179 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4180 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4181 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4182 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4183 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4184 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4185 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4186 4187 /* large_rx disabled for now, additional features needed */ 4188 ctrl_buf->large_rx_ipv4 = 0; 4189 ctrl_buf->large_rx_ipv6 = 0; 4190 4191 if (adapter->state != VNIC_PROBING) { 4192 old_hw_features = adapter->netdev->hw_features; 4193 adapter->netdev->hw_features = 0; 4194 } 4195 4196 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4197 4198 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4199 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4200 4201 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4202 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4203 4204 if ((adapter->netdev->features & 4205 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4206 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4207 4208 if (buf->large_tx_ipv4) 4209 adapter->netdev->hw_features |= NETIF_F_TSO; 4210 if (buf->large_tx_ipv6) 4211 adapter->netdev->hw_features |= NETIF_F_TSO6; 4212 4213 if (adapter->state == VNIC_PROBING) { 4214 adapter->netdev->features |= adapter->netdev->hw_features; 4215 } else if (old_hw_features != adapter->netdev->hw_features) { 4216 netdev_features_t tmp = 0; 4217 4218 /* disable features no longer supported */ 4219 adapter->netdev->features &= adapter->netdev->hw_features; 4220 /* turn on features now supported if previously enabled */ 4221 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4222 adapter->netdev->hw_features; 4223 adapter->netdev->features |= 4224 tmp & adapter->netdev->wanted_features; 4225 } 4226 4227 memset(&crq, 0, sizeof(crq)); 4228 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4229 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4230 crq.control_ip_offload.len = 4231 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4232 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4233 ibmvnic_send_crq(adapter, &crq); 4234 } 4235 4236 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4237 struct ibmvnic_adapter *adapter) 4238 { 4239 struct device *dev = &adapter->vdev->dev; 4240 4241 if (crq->get_vpd_size_rsp.rc.code) { 4242 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4243 crq->get_vpd_size_rsp.rc.code); 4244 complete(&adapter->fw_done); 4245 return; 4246 } 4247 4248 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4249 complete(&adapter->fw_done); 4250 } 4251 4252 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4253 struct ibmvnic_adapter *adapter) 4254 { 4255 struct device *dev = &adapter->vdev->dev; 4256 unsigned char *substr = NULL; 4257 u8 fw_level_len = 0; 4258 4259 memset(adapter->fw_version, 0, 32); 4260 4261 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4262 DMA_FROM_DEVICE); 4263 4264 if (crq->get_vpd_rsp.rc.code) { 4265 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4266 crq->get_vpd_rsp.rc.code); 4267 goto complete; 4268 } 4269 4270 /* get the position of the firmware version info 4271 * located after the ASCII 'RM' substring in the buffer 4272 */ 4273 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4274 if (!substr) { 4275 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4276 goto complete; 4277 } 4278 4279 /* get length of firmware level ASCII substring */ 4280 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4281 fw_level_len = *(substr + 2); 4282 } else { 4283 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4284 goto complete; 4285 } 4286 4287 /* copy firmware version string from vpd into adapter */ 4288 if ((substr + 3 + fw_level_len) < 4289 (adapter->vpd->buff + adapter->vpd->len)) { 4290 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4291 } else { 4292 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4293 } 4294 4295 complete: 4296 if (adapter->fw_version[0] == '\0') 4297 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4298 complete(&adapter->fw_done); 4299 } 4300 4301 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4302 { 4303 struct device *dev = &adapter->vdev->dev; 4304 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4305 int i; 4306 4307 dma_unmap_single(dev, adapter->ip_offload_tok, 4308 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4309 4310 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4311 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4312 netdev_dbg(adapter->netdev, "%016lx\n", 4313 ((unsigned long int *)(buf))[i]); 4314 4315 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4316 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4317 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4318 buf->tcp_ipv4_chksum); 4319 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4320 buf->tcp_ipv6_chksum); 4321 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4322 buf->udp_ipv4_chksum); 4323 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4324 buf->udp_ipv6_chksum); 4325 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4326 buf->large_tx_ipv4); 4327 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4328 buf->large_tx_ipv6); 4329 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4330 buf->large_rx_ipv4); 4331 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4332 buf->large_rx_ipv6); 4333 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4334 buf->max_ipv4_header_size); 4335 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4336 buf->max_ipv6_header_size); 4337 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4338 buf->max_tcp_header_size); 4339 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4340 buf->max_udp_header_size); 4341 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4342 buf->max_large_tx_size); 4343 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4344 buf->max_large_rx_size); 4345 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4346 buf->ipv6_extension_header); 4347 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4348 buf->tcp_pseudosum_req); 4349 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4350 buf->num_ipv6_ext_headers); 4351 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4352 buf->off_ipv6_ext_headers); 4353 4354 send_control_ip_offload(adapter); 4355 } 4356 4357 static const char *ibmvnic_fw_err_cause(u16 cause) 4358 { 4359 switch (cause) { 4360 case ADAPTER_PROBLEM: 4361 return "adapter problem"; 4362 case BUS_PROBLEM: 4363 return "bus problem"; 4364 case FW_PROBLEM: 4365 return "firmware problem"; 4366 case DD_PROBLEM: 4367 return "device driver problem"; 4368 case EEH_RECOVERY: 4369 return "EEH recovery"; 4370 case FW_UPDATED: 4371 return "firmware updated"; 4372 case LOW_MEMORY: 4373 return "low Memory"; 4374 default: 4375 return "unknown"; 4376 } 4377 } 4378 4379 static void handle_error_indication(union ibmvnic_crq *crq, 4380 struct ibmvnic_adapter *adapter) 4381 { 4382 struct device *dev = &adapter->vdev->dev; 4383 u16 cause; 4384 4385 cause = be16_to_cpu(crq->error_indication.error_cause); 4386 4387 dev_warn_ratelimited(dev, 4388 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4389 crq->error_indication.flags 4390 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4391 ibmvnic_fw_err_cause(cause)); 4392 4393 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4394 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4395 else 4396 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4397 } 4398 4399 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4400 struct ibmvnic_adapter *adapter) 4401 { 4402 struct net_device *netdev = adapter->netdev; 4403 struct device *dev = &adapter->vdev->dev; 4404 long rc; 4405 4406 rc = crq->change_mac_addr_rsp.rc.code; 4407 if (rc) { 4408 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4409 goto out; 4410 } 4411 /* crq->change_mac_addr.mac_addr is the requested one 4412 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4413 */ 4414 ether_addr_copy(netdev->dev_addr, 4415 &crq->change_mac_addr_rsp.mac_addr[0]); 4416 ether_addr_copy(adapter->mac_addr, 4417 &crq->change_mac_addr_rsp.mac_addr[0]); 4418 out: 4419 complete(&adapter->fw_done); 4420 return rc; 4421 } 4422 4423 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4424 struct ibmvnic_adapter *adapter) 4425 { 4426 struct device *dev = &adapter->vdev->dev; 4427 u64 *req_value; 4428 char *name; 4429 4430 atomic_dec(&adapter->running_cap_crqs); 4431 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4432 case REQ_TX_QUEUES: 4433 req_value = &adapter->req_tx_queues; 4434 name = "tx"; 4435 break; 4436 case REQ_RX_QUEUES: 4437 req_value = &adapter->req_rx_queues; 4438 name = "rx"; 4439 break; 4440 case REQ_RX_ADD_QUEUES: 4441 req_value = &adapter->req_rx_add_queues; 4442 name = "rx_add"; 4443 break; 4444 case REQ_TX_ENTRIES_PER_SUBCRQ: 4445 req_value = &adapter->req_tx_entries_per_subcrq; 4446 name = "tx_entries_per_subcrq"; 4447 break; 4448 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4449 req_value = &adapter->req_rx_add_entries_per_subcrq; 4450 name = "rx_add_entries_per_subcrq"; 4451 break; 4452 case REQ_MTU: 4453 req_value = &adapter->req_mtu; 4454 name = "mtu"; 4455 break; 4456 case PROMISC_REQUESTED: 4457 req_value = &adapter->promisc; 4458 name = "promisc"; 4459 break; 4460 default: 4461 dev_err(dev, "Got invalid cap request rsp %d\n", 4462 crq->request_capability.capability); 4463 return; 4464 } 4465 4466 switch (crq->request_capability_rsp.rc.code) { 4467 case SUCCESS: 4468 break; 4469 case PARTIALSUCCESS: 4470 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4471 *req_value, 4472 (long int)be64_to_cpu(crq->request_capability_rsp. 4473 number), name); 4474 4475 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4476 REQ_MTU) { 4477 pr_err("mtu of %llu is not supported. Reverting.\n", 4478 *req_value); 4479 *req_value = adapter->fallback.mtu; 4480 } else { 4481 *req_value = 4482 be64_to_cpu(crq->request_capability_rsp.number); 4483 } 4484 4485 send_request_cap(adapter, 1); 4486 return; 4487 default: 4488 dev_err(dev, "Error %d in request cap rsp\n", 4489 crq->request_capability_rsp.rc.code); 4490 return; 4491 } 4492 4493 /* Done receiving requested capabilities, query IP offload support */ 4494 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4495 adapter->wait_capability = false; 4496 send_query_ip_offload(adapter); 4497 } 4498 } 4499 4500 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4501 struct ibmvnic_adapter *adapter) 4502 { 4503 struct device *dev = &adapter->vdev->dev; 4504 struct net_device *netdev = adapter->netdev; 4505 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4506 struct ibmvnic_login_buffer *login = adapter->login_buf; 4507 u64 *tx_handle_array; 4508 u64 *rx_handle_array; 4509 int num_tx_pools; 4510 int num_rx_pools; 4511 u64 *size_array; 4512 int i; 4513 4514 /* CHECK: Test/set of login_pending does not need to be atomic 4515 * because only ibmvnic_tasklet tests/clears this. 4516 */ 4517 if (!adapter->login_pending) { 4518 netdev_warn(netdev, "Ignoring unexpected login response\n"); 4519 return 0; 4520 } 4521 adapter->login_pending = false; 4522 4523 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4524 DMA_TO_DEVICE); 4525 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4526 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4527 4528 /* If the number of queues requested can't be allocated by the 4529 * server, the login response will return with code 1. We will need 4530 * to resend the login buffer with fewer queues requested. 4531 */ 4532 if (login_rsp_crq->generic.rc.code) { 4533 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4534 complete(&adapter->init_done); 4535 return 0; 4536 } 4537 4538 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4539 4540 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4541 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4542 netdev_dbg(adapter->netdev, "%016lx\n", 4543 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4544 } 4545 4546 /* Sanity checks */ 4547 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4548 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4549 adapter->req_rx_add_queues != 4550 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4551 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4552 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4553 return -EIO; 4554 } 4555 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4556 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4557 /* variable buffer sizes are not supported, so just read the 4558 * first entry. 4559 */ 4560 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4561 4562 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4563 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4564 4565 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4566 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4567 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4568 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4569 4570 for (i = 0; i < num_tx_pools; i++) 4571 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4572 4573 for (i = 0; i < num_rx_pools; i++) 4574 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4575 4576 adapter->num_active_tx_scrqs = num_tx_pools; 4577 adapter->num_active_rx_scrqs = num_rx_pools; 4578 release_login_rsp_buffer(adapter); 4579 release_login_buffer(adapter); 4580 complete(&adapter->init_done); 4581 4582 return 0; 4583 } 4584 4585 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4586 struct ibmvnic_adapter *adapter) 4587 { 4588 struct device *dev = &adapter->vdev->dev; 4589 long rc; 4590 4591 rc = crq->request_unmap_rsp.rc.code; 4592 if (rc) 4593 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4594 } 4595 4596 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4597 struct ibmvnic_adapter *adapter) 4598 { 4599 struct net_device *netdev = adapter->netdev; 4600 struct device *dev = &adapter->vdev->dev; 4601 long rc; 4602 4603 rc = crq->query_map_rsp.rc.code; 4604 if (rc) { 4605 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4606 return; 4607 } 4608 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4609 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4610 crq->query_map_rsp.free_pages); 4611 } 4612 4613 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4614 struct ibmvnic_adapter *adapter) 4615 { 4616 struct net_device *netdev = adapter->netdev; 4617 struct device *dev = &adapter->vdev->dev; 4618 long rc; 4619 4620 atomic_dec(&adapter->running_cap_crqs); 4621 netdev_dbg(netdev, "Outstanding queries: %d\n", 4622 atomic_read(&adapter->running_cap_crqs)); 4623 rc = crq->query_capability.rc.code; 4624 if (rc) { 4625 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4626 goto out; 4627 } 4628 4629 switch (be16_to_cpu(crq->query_capability.capability)) { 4630 case MIN_TX_QUEUES: 4631 adapter->min_tx_queues = 4632 be64_to_cpu(crq->query_capability.number); 4633 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4634 adapter->min_tx_queues); 4635 break; 4636 case MIN_RX_QUEUES: 4637 adapter->min_rx_queues = 4638 be64_to_cpu(crq->query_capability.number); 4639 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4640 adapter->min_rx_queues); 4641 break; 4642 case MIN_RX_ADD_QUEUES: 4643 adapter->min_rx_add_queues = 4644 be64_to_cpu(crq->query_capability.number); 4645 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4646 adapter->min_rx_add_queues); 4647 break; 4648 case MAX_TX_QUEUES: 4649 adapter->max_tx_queues = 4650 be64_to_cpu(crq->query_capability.number); 4651 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4652 adapter->max_tx_queues); 4653 break; 4654 case MAX_RX_QUEUES: 4655 adapter->max_rx_queues = 4656 be64_to_cpu(crq->query_capability.number); 4657 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4658 adapter->max_rx_queues); 4659 break; 4660 case MAX_RX_ADD_QUEUES: 4661 adapter->max_rx_add_queues = 4662 be64_to_cpu(crq->query_capability.number); 4663 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4664 adapter->max_rx_add_queues); 4665 break; 4666 case MIN_TX_ENTRIES_PER_SUBCRQ: 4667 adapter->min_tx_entries_per_subcrq = 4668 be64_to_cpu(crq->query_capability.number); 4669 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4670 adapter->min_tx_entries_per_subcrq); 4671 break; 4672 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4673 adapter->min_rx_add_entries_per_subcrq = 4674 be64_to_cpu(crq->query_capability.number); 4675 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4676 adapter->min_rx_add_entries_per_subcrq); 4677 break; 4678 case MAX_TX_ENTRIES_PER_SUBCRQ: 4679 adapter->max_tx_entries_per_subcrq = 4680 be64_to_cpu(crq->query_capability.number); 4681 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4682 adapter->max_tx_entries_per_subcrq); 4683 break; 4684 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4685 adapter->max_rx_add_entries_per_subcrq = 4686 be64_to_cpu(crq->query_capability.number); 4687 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4688 adapter->max_rx_add_entries_per_subcrq); 4689 break; 4690 case TCP_IP_OFFLOAD: 4691 adapter->tcp_ip_offload = 4692 be64_to_cpu(crq->query_capability.number); 4693 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4694 adapter->tcp_ip_offload); 4695 break; 4696 case PROMISC_SUPPORTED: 4697 adapter->promisc_supported = 4698 be64_to_cpu(crq->query_capability.number); 4699 netdev_dbg(netdev, "promisc_supported = %lld\n", 4700 adapter->promisc_supported); 4701 break; 4702 case MIN_MTU: 4703 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4704 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4705 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4706 break; 4707 case MAX_MTU: 4708 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4709 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4710 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4711 break; 4712 case MAX_MULTICAST_FILTERS: 4713 adapter->max_multicast_filters = 4714 be64_to_cpu(crq->query_capability.number); 4715 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4716 adapter->max_multicast_filters); 4717 break; 4718 case VLAN_HEADER_INSERTION: 4719 adapter->vlan_header_insertion = 4720 be64_to_cpu(crq->query_capability.number); 4721 if (adapter->vlan_header_insertion) 4722 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4723 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4724 adapter->vlan_header_insertion); 4725 break; 4726 case RX_VLAN_HEADER_INSERTION: 4727 adapter->rx_vlan_header_insertion = 4728 be64_to_cpu(crq->query_capability.number); 4729 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4730 adapter->rx_vlan_header_insertion); 4731 break; 4732 case MAX_TX_SG_ENTRIES: 4733 adapter->max_tx_sg_entries = 4734 be64_to_cpu(crq->query_capability.number); 4735 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4736 adapter->max_tx_sg_entries); 4737 break; 4738 case RX_SG_SUPPORTED: 4739 adapter->rx_sg_supported = 4740 be64_to_cpu(crq->query_capability.number); 4741 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4742 adapter->rx_sg_supported); 4743 break; 4744 case OPT_TX_COMP_SUB_QUEUES: 4745 adapter->opt_tx_comp_sub_queues = 4746 be64_to_cpu(crq->query_capability.number); 4747 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4748 adapter->opt_tx_comp_sub_queues); 4749 break; 4750 case OPT_RX_COMP_QUEUES: 4751 adapter->opt_rx_comp_queues = 4752 be64_to_cpu(crq->query_capability.number); 4753 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4754 adapter->opt_rx_comp_queues); 4755 break; 4756 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4757 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4758 be64_to_cpu(crq->query_capability.number); 4759 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4760 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4761 break; 4762 case OPT_TX_ENTRIES_PER_SUBCRQ: 4763 adapter->opt_tx_entries_per_subcrq = 4764 be64_to_cpu(crq->query_capability.number); 4765 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4766 adapter->opt_tx_entries_per_subcrq); 4767 break; 4768 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4769 adapter->opt_rxba_entries_per_subcrq = 4770 be64_to_cpu(crq->query_capability.number); 4771 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4772 adapter->opt_rxba_entries_per_subcrq); 4773 break; 4774 case TX_RX_DESC_REQ: 4775 adapter->tx_rx_desc_req = crq->query_capability.number; 4776 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4777 adapter->tx_rx_desc_req); 4778 break; 4779 4780 default: 4781 netdev_err(netdev, "Got invalid cap rsp %d\n", 4782 crq->query_capability.capability); 4783 } 4784 4785 out: 4786 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4787 adapter->wait_capability = false; 4788 send_request_cap(adapter, 0); 4789 } 4790 } 4791 4792 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4793 { 4794 union ibmvnic_crq crq; 4795 int rc; 4796 4797 memset(&crq, 0, sizeof(crq)); 4798 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4799 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4800 4801 mutex_lock(&adapter->fw_lock); 4802 adapter->fw_done_rc = 0; 4803 reinit_completion(&adapter->fw_done); 4804 4805 rc = ibmvnic_send_crq(adapter, &crq); 4806 if (rc) { 4807 mutex_unlock(&adapter->fw_lock); 4808 return rc; 4809 } 4810 4811 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4812 if (rc) { 4813 mutex_unlock(&adapter->fw_lock); 4814 return rc; 4815 } 4816 4817 mutex_unlock(&adapter->fw_lock); 4818 return adapter->fw_done_rc ? -EIO : 0; 4819 } 4820 4821 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4822 struct ibmvnic_adapter *adapter) 4823 { 4824 struct net_device *netdev = adapter->netdev; 4825 int rc; 4826 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4827 4828 rc = crq->query_phys_parms_rsp.rc.code; 4829 if (rc) { 4830 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4831 return rc; 4832 } 4833 switch (rspeed) { 4834 case IBMVNIC_10MBPS: 4835 adapter->speed = SPEED_10; 4836 break; 4837 case IBMVNIC_100MBPS: 4838 adapter->speed = SPEED_100; 4839 break; 4840 case IBMVNIC_1GBPS: 4841 adapter->speed = SPEED_1000; 4842 break; 4843 case IBMVNIC_10GBPS: 4844 adapter->speed = SPEED_10000; 4845 break; 4846 case IBMVNIC_25GBPS: 4847 adapter->speed = SPEED_25000; 4848 break; 4849 case IBMVNIC_40GBPS: 4850 adapter->speed = SPEED_40000; 4851 break; 4852 case IBMVNIC_50GBPS: 4853 adapter->speed = SPEED_50000; 4854 break; 4855 case IBMVNIC_100GBPS: 4856 adapter->speed = SPEED_100000; 4857 break; 4858 case IBMVNIC_200GBPS: 4859 adapter->speed = SPEED_200000; 4860 break; 4861 default: 4862 if (netif_carrier_ok(netdev)) 4863 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4864 adapter->speed = SPEED_UNKNOWN; 4865 } 4866 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4867 adapter->duplex = DUPLEX_FULL; 4868 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4869 adapter->duplex = DUPLEX_HALF; 4870 else 4871 adapter->duplex = DUPLEX_UNKNOWN; 4872 4873 return rc; 4874 } 4875 4876 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4877 struct ibmvnic_adapter *adapter) 4878 { 4879 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4880 struct net_device *netdev = adapter->netdev; 4881 struct device *dev = &adapter->vdev->dev; 4882 u64 *u64_crq = (u64 *)crq; 4883 long rc; 4884 4885 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4886 (unsigned long int)cpu_to_be64(u64_crq[0]), 4887 (unsigned long int)cpu_to_be64(u64_crq[1])); 4888 switch (gen_crq->first) { 4889 case IBMVNIC_CRQ_INIT_RSP: 4890 switch (gen_crq->cmd) { 4891 case IBMVNIC_CRQ_INIT: 4892 dev_info(dev, "Partner initialized\n"); 4893 adapter->from_passive_init = true; 4894 /* Discard any stale login responses from prev reset. 4895 * CHECK: should we clear even on INIT_COMPLETE? 4896 */ 4897 adapter->login_pending = false; 4898 4899 if (!completion_done(&adapter->init_done)) { 4900 complete(&adapter->init_done); 4901 adapter->init_done_rc = -EIO; 4902 } 4903 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4904 break; 4905 case IBMVNIC_CRQ_INIT_COMPLETE: 4906 dev_info(dev, "Partner initialization complete\n"); 4907 adapter->crq.active = true; 4908 send_version_xchg(adapter); 4909 break; 4910 default: 4911 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4912 } 4913 return; 4914 case IBMVNIC_CRQ_XPORT_EVENT: 4915 netif_carrier_off(netdev); 4916 adapter->crq.active = false; 4917 /* terminate any thread waiting for a response 4918 * from the device 4919 */ 4920 if (!completion_done(&adapter->fw_done)) { 4921 adapter->fw_done_rc = -EIO; 4922 complete(&adapter->fw_done); 4923 } 4924 if (!completion_done(&adapter->stats_done)) 4925 complete(&adapter->stats_done); 4926 if (test_bit(0, &adapter->resetting)) 4927 adapter->force_reset_recovery = true; 4928 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4929 dev_info(dev, "Migrated, re-enabling adapter\n"); 4930 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4931 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4932 dev_info(dev, "Backing device failover detected\n"); 4933 adapter->failover_pending = true; 4934 } else { 4935 /* The adapter lost the connection */ 4936 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4937 gen_crq->cmd); 4938 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4939 } 4940 return; 4941 case IBMVNIC_CRQ_CMD_RSP: 4942 break; 4943 default: 4944 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4945 gen_crq->first); 4946 return; 4947 } 4948 4949 switch (gen_crq->cmd) { 4950 case VERSION_EXCHANGE_RSP: 4951 rc = crq->version_exchange_rsp.rc.code; 4952 if (rc) { 4953 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4954 break; 4955 } 4956 ibmvnic_version = 4957 be16_to_cpu(crq->version_exchange_rsp.version); 4958 dev_info(dev, "Partner protocol version is %d\n", 4959 ibmvnic_version); 4960 send_query_cap(adapter); 4961 break; 4962 case QUERY_CAPABILITY_RSP: 4963 handle_query_cap_rsp(crq, adapter); 4964 break; 4965 case QUERY_MAP_RSP: 4966 handle_query_map_rsp(crq, adapter); 4967 break; 4968 case REQUEST_MAP_RSP: 4969 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4970 complete(&adapter->fw_done); 4971 break; 4972 case REQUEST_UNMAP_RSP: 4973 handle_request_unmap_rsp(crq, adapter); 4974 break; 4975 case REQUEST_CAPABILITY_RSP: 4976 handle_request_cap_rsp(crq, adapter); 4977 break; 4978 case LOGIN_RSP: 4979 netdev_dbg(netdev, "Got Login Response\n"); 4980 handle_login_rsp(crq, adapter); 4981 break; 4982 case LOGICAL_LINK_STATE_RSP: 4983 netdev_dbg(netdev, 4984 "Got Logical Link State Response, state: %d rc: %d\n", 4985 crq->logical_link_state_rsp.link_state, 4986 crq->logical_link_state_rsp.rc.code); 4987 adapter->logical_link_state = 4988 crq->logical_link_state_rsp.link_state; 4989 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4990 complete(&adapter->init_done); 4991 break; 4992 case LINK_STATE_INDICATION: 4993 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4994 adapter->phys_link_state = 4995 crq->link_state_indication.phys_link_state; 4996 adapter->logical_link_state = 4997 crq->link_state_indication.logical_link_state; 4998 if (adapter->phys_link_state && adapter->logical_link_state) 4999 netif_carrier_on(netdev); 5000 else 5001 netif_carrier_off(netdev); 5002 break; 5003 case CHANGE_MAC_ADDR_RSP: 5004 netdev_dbg(netdev, "Got MAC address change Response\n"); 5005 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 5006 break; 5007 case ERROR_INDICATION: 5008 netdev_dbg(netdev, "Got Error Indication\n"); 5009 handle_error_indication(crq, adapter); 5010 break; 5011 case REQUEST_STATISTICS_RSP: 5012 netdev_dbg(netdev, "Got Statistics Response\n"); 5013 complete(&adapter->stats_done); 5014 break; 5015 case QUERY_IP_OFFLOAD_RSP: 5016 netdev_dbg(netdev, "Got Query IP offload Response\n"); 5017 handle_query_ip_offload_rsp(adapter); 5018 break; 5019 case MULTICAST_CTRL_RSP: 5020 netdev_dbg(netdev, "Got multicast control Response\n"); 5021 break; 5022 case CONTROL_IP_OFFLOAD_RSP: 5023 netdev_dbg(netdev, "Got Control IP offload Response\n"); 5024 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 5025 sizeof(adapter->ip_offload_ctrl), 5026 DMA_TO_DEVICE); 5027 complete(&adapter->init_done); 5028 break; 5029 case COLLECT_FW_TRACE_RSP: 5030 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 5031 complete(&adapter->fw_done); 5032 break; 5033 case GET_VPD_SIZE_RSP: 5034 handle_vpd_size_rsp(crq, adapter); 5035 break; 5036 case GET_VPD_RSP: 5037 handle_vpd_rsp(crq, adapter); 5038 break; 5039 case QUERY_PHYS_PARMS_RSP: 5040 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 5041 complete(&adapter->fw_done); 5042 break; 5043 default: 5044 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 5045 gen_crq->cmd); 5046 } 5047 } 5048 5049 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 5050 { 5051 struct ibmvnic_adapter *adapter = instance; 5052 5053 tasklet_schedule(&adapter->tasklet); 5054 return IRQ_HANDLED; 5055 } 5056 5057 static void ibmvnic_tasklet(struct tasklet_struct *t) 5058 { 5059 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 5060 struct ibmvnic_crq_queue *queue = &adapter->crq; 5061 union ibmvnic_crq *crq; 5062 unsigned long flags; 5063 bool done = false; 5064 5065 spin_lock_irqsave(&queue->lock, flags); 5066 while (!done) { 5067 /* Pull all the valid messages off the CRQ */ 5068 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 5069 ibmvnic_handle_crq(crq, adapter); 5070 crq->generic.first = 0; 5071 } 5072 5073 /* remain in tasklet until all 5074 * capabilities responses are received 5075 */ 5076 if (!adapter->wait_capability) 5077 done = true; 5078 } 5079 /* if capabilities CRQ's were sent in this tasklet, the following 5080 * tasklet must wait until all responses are received 5081 */ 5082 if (atomic_read(&adapter->running_cap_crqs) != 0) 5083 adapter->wait_capability = true; 5084 spin_unlock_irqrestore(&queue->lock, flags); 5085 } 5086 5087 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 5088 { 5089 struct vio_dev *vdev = adapter->vdev; 5090 int rc; 5091 5092 do { 5093 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 5094 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5095 5096 if (rc) 5097 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 5098 5099 return rc; 5100 } 5101 5102 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 5103 { 5104 struct ibmvnic_crq_queue *crq = &adapter->crq; 5105 struct device *dev = &adapter->vdev->dev; 5106 struct vio_dev *vdev = adapter->vdev; 5107 int rc; 5108 5109 /* Close the CRQ */ 5110 do { 5111 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5112 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5113 5114 /* Clean out the queue */ 5115 if (!crq->msgs) 5116 return -EINVAL; 5117 5118 memset(crq->msgs, 0, PAGE_SIZE); 5119 crq->cur = 0; 5120 crq->active = false; 5121 5122 /* And re-open it again */ 5123 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5124 crq->msg_token, PAGE_SIZE); 5125 5126 if (rc == H_CLOSED) 5127 /* Adapter is good, but other end is not ready */ 5128 dev_warn(dev, "Partner adapter not ready\n"); 5129 else if (rc != 0) 5130 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 5131 5132 return rc; 5133 } 5134 5135 static void release_crq_queue(struct ibmvnic_adapter *adapter) 5136 { 5137 struct ibmvnic_crq_queue *crq = &adapter->crq; 5138 struct vio_dev *vdev = adapter->vdev; 5139 long rc; 5140 5141 if (!crq->msgs) 5142 return; 5143 5144 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5145 free_irq(vdev->irq, adapter); 5146 tasklet_kill(&adapter->tasklet); 5147 do { 5148 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5149 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5150 5151 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5152 DMA_BIDIRECTIONAL); 5153 free_page((unsigned long)crq->msgs); 5154 crq->msgs = NULL; 5155 crq->active = false; 5156 } 5157 5158 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5159 { 5160 struct ibmvnic_crq_queue *crq = &adapter->crq; 5161 struct device *dev = &adapter->vdev->dev; 5162 struct vio_dev *vdev = adapter->vdev; 5163 int rc, retrc = -ENOMEM; 5164 5165 if (crq->msgs) 5166 return 0; 5167 5168 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5169 /* Should we allocate more than one page? */ 5170 5171 if (!crq->msgs) 5172 return -ENOMEM; 5173 5174 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5175 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5176 DMA_BIDIRECTIONAL); 5177 if (dma_mapping_error(dev, crq->msg_token)) 5178 goto map_failed; 5179 5180 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5181 crq->msg_token, PAGE_SIZE); 5182 5183 if (rc == H_RESOURCE) 5184 /* maybe kexecing and resource is busy. try a reset */ 5185 rc = ibmvnic_reset_crq(adapter); 5186 retrc = rc; 5187 5188 if (rc == H_CLOSED) { 5189 dev_warn(dev, "Partner adapter not ready\n"); 5190 } else if (rc) { 5191 dev_warn(dev, "Error %d opening adapter\n", rc); 5192 goto reg_crq_failed; 5193 } 5194 5195 retrc = 0; 5196 5197 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5198 5199 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5200 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5201 adapter->vdev->unit_address); 5202 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5203 if (rc) { 5204 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5205 vdev->irq, rc); 5206 goto req_irq_failed; 5207 } 5208 5209 rc = vio_enable_interrupts(vdev); 5210 if (rc) { 5211 dev_err(dev, "Error %d enabling interrupts\n", rc); 5212 goto req_irq_failed; 5213 } 5214 5215 crq->cur = 0; 5216 spin_lock_init(&crq->lock); 5217 5218 return retrc; 5219 5220 req_irq_failed: 5221 tasklet_kill(&adapter->tasklet); 5222 do { 5223 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5224 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5225 reg_crq_failed: 5226 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5227 map_failed: 5228 free_page((unsigned long)crq->msgs); 5229 crq->msgs = NULL; 5230 return retrc; 5231 } 5232 5233 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5234 { 5235 struct device *dev = &adapter->vdev->dev; 5236 unsigned long timeout = msecs_to_jiffies(20000); 5237 u64 old_num_rx_queues, old_num_tx_queues; 5238 int rc; 5239 5240 adapter->from_passive_init = false; 5241 5242 if (reset) { 5243 old_num_rx_queues = adapter->req_rx_queues; 5244 old_num_tx_queues = adapter->req_tx_queues; 5245 reinit_completion(&adapter->init_done); 5246 } 5247 5248 adapter->init_done_rc = 0; 5249 rc = ibmvnic_send_crq_init(adapter); 5250 if (rc) { 5251 dev_err(dev, "Send crq init failed with error %d\n", rc); 5252 return rc; 5253 } 5254 5255 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5256 dev_err(dev, "Initialization sequence timed out\n"); 5257 return -1; 5258 } 5259 5260 if (adapter->init_done_rc) { 5261 release_crq_queue(adapter); 5262 return adapter->init_done_rc; 5263 } 5264 5265 if (adapter->from_passive_init) { 5266 adapter->state = VNIC_OPEN; 5267 adapter->from_passive_init = false; 5268 return -1; 5269 } 5270 5271 if (reset && 5272 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5273 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5274 if (adapter->req_rx_queues != old_num_rx_queues || 5275 adapter->req_tx_queues != old_num_tx_queues) { 5276 release_sub_crqs(adapter, 0); 5277 rc = init_sub_crqs(adapter); 5278 } else { 5279 rc = reset_sub_crq_queues(adapter); 5280 } 5281 } else { 5282 rc = init_sub_crqs(adapter); 5283 } 5284 5285 if (rc) { 5286 dev_err(dev, "Initialization of sub crqs failed\n"); 5287 release_crq_queue(adapter); 5288 return rc; 5289 } 5290 5291 rc = init_sub_crq_irqs(adapter); 5292 if (rc) { 5293 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5294 release_crq_queue(adapter); 5295 } 5296 5297 return rc; 5298 } 5299 5300 static struct device_attribute dev_attr_failover; 5301 5302 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5303 { 5304 struct ibmvnic_adapter *adapter; 5305 struct net_device *netdev; 5306 unsigned char *mac_addr_p; 5307 int rc; 5308 5309 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5310 dev->unit_address); 5311 5312 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5313 VETH_MAC_ADDR, NULL); 5314 if (!mac_addr_p) { 5315 dev_err(&dev->dev, 5316 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5317 __FILE__, __LINE__); 5318 return 0; 5319 } 5320 5321 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5322 IBMVNIC_MAX_QUEUES); 5323 if (!netdev) 5324 return -ENOMEM; 5325 5326 adapter = netdev_priv(netdev); 5327 adapter->state = VNIC_PROBING; 5328 dev_set_drvdata(&dev->dev, netdev); 5329 adapter->vdev = dev; 5330 adapter->netdev = netdev; 5331 adapter->login_pending = false; 5332 5333 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5334 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5335 netdev->irq = dev->irq; 5336 netdev->netdev_ops = &ibmvnic_netdev_ops; 5337 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5338 SET_NETDEV_DEV(netdev, &dev->dev); 5339 5340 spin_lock_init(&adapter->stats_lock); 5341 5342 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5343 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5344 __ibmvnic_delayed_reset); 5345 INIT_LIST_HEAD(&adapter->rwi_list); 5346 spin_lock_init(&adapter->rwi_lock); 5347 spin_lock_init(&adapter->state_lock); 5348 mutex_init(&adapter->fw_lock); 5349 init_completion(&adapter->init_done); 5350 init_completion(&adapter->fw_done); 5351 init_completion(&adapter->reset_done); 5352 init_completion(&adapter->stats_done); 5353 clear_bit(0, &adapter->resetting); 5354 5355 do { 5356 rc = init_crq_queue(adapter); 5357 if (rc) { 5358 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5359 rc); 5360 goto ibmvnic_init_fail; 5361 } 5362 5363 rc = ibmvnic_reset_init(adapter, false); 5364 if (rc && rc != EAGAIN) 5365 goto ibmvnic_init_fail; 5366 } while (rc == EAGAIN); 5367 5368 rc = init_stats_buffers(adapter); 5369 if (rc) 5370 goto ibmvnic_init_fail; 5371 5372 rc = init_stats_token(adapter); 5373 if (rc) 5374 goto ibmvnic_stats_fail; 5375 5376 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5377 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5378 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5379 5380 rc = device_create_file(&dev->dev, &dev_attr_failover); 5381 if (rc) 5382 goto ibmvnic_dev_file_err; 5383 5384 netif_carrier_off(netdev); 5385 rc = register_netdev(netdev); 5386 if (rc) { 5387 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5388 goto ibmvnic_register_fail; 5389 } 5390 dev_info(&dev->dev, "ibmvnic registered\n"); 5391 5392 adapter->state = VNIC_PROBED; 5393 5394 adapter->wait_for_reset = false; 5395 adapter->last_reset_time = jiffies; 5396 return 0; 5397 5398 ibmvnic_register_fail: 5399 device_remove_file(&dev->dev, &dev_attr_failover); 5400 5401 ibmvnic_dev_file_err: 5402 release_stats_token(adapter); 5403 5404 ibmvnic_stats_fail: 5405 release_stats_buffers(adapter); 5406 5407 ibmvnic_init_fail: 5408 release_sub_crqs(adapter, 1); 5409 release_crq_queue(adapter); 5410 mutex_destroy(&adapter->fw_lock); 5411 free_netdev(netdev); 5412 5413 return rc; 5414 } 5415 5416 static int ibmvnic_remove(struct vio_dev *dev) 5417 { 5418 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5419 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5420 unsigned long flags; 5421 5422 spin_lock_irqsave(&adapter->state_lock, flags); 5423 if (test_bit(0, &adapter->resetting)) { 5424 spin_unlock_irqrestore(&adapter->state_lock, flags); 5425 return -EBUSY; 5426 } 5427 5428 adapter->state = VNIC_REMOVING; 5429 spin_unlock_irqrestore(&adapter->state_lock, flags); 5430 5431 flush_work(&adapter->ibmvnic_reset); 5432 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5433 5434 rtnl_lock(); 5435 unregister_netdevice(netdev); 5436 5437 release_resources(adapter); 5438 release_sub_crqs(adapter, 1); 5439 release_crq_queue(adapter); 5440 5441 release_stats_token(adapter); 5442 release_stats_buffers(adapter); 5443 5444 adapter->state = VNIC_REMOVED; 5445 5446 rtnl_unlock(); 5447 mutex_destroy(&adapter->fw_lock); 5448 device_remove_file(&dev->dev, &dev_attr_failover); 5449 free_netdev(netdev); 5450 dev_set_drvdata(&dev->dev, NULL); 5451 5452 return 0; 5453 } 5454 5455 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5456 const char *buf, size_t count) 5457 { 5458 struct net_device *netdev = dev_get_drvdata(dev); 5459 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5460 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5461 __be64 session_token; 5462 long rc; 5463 5464 if (!sysfs_streq(buf, "1")) 5465 return -EINVAL; 5466 5467 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5468 H_GET_SESSION_TOKEN, 0, 0, 0); 5469 if (rc) { 5470 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5471 rc); 5472 return -EINVAL; 5473 } 5474 5475 session_token = (__be64)retbuf[0]; 5476 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5477 be64_to_cpu(session_token)); 5478 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5479 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5480 if (rc) { 5481 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5482 rc); 5483 return -EINVAL; 5484 } 5485 5486 return count; 5487 } 5488 5489 static DEVICE_ATTR_WO(failover); 5490 5491 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5492 { 5493 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5494 struct ibmvnic_adapter *adapter; 5495 struct iommu_table *tbl; 5496 unsigned long ret = 0; 5497 int i; 5498 5499 tbl = get_iommu_table_base(&vdev->dev); 5500 5501 /* netdev inits at probe time along with the structures we need below*/ 5502 if (!netdev) 5503 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5504 5505 adapter = netdev_priv(netdev); 5506 5507 ret += PAGE_SIZE; /* the crq message queue */ 5508 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5509 5510 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5511 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5512 5513 for (i = 0; i < adapter->num_active_rx_pools; i++) 5514 ret += adapter->rx_pool[i].size * 5515 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5516 5517 return ret; 5518 } 5519 5520 static int ibmvnic_resume(struct device *dev) 5521 { 5522 struct net_device *netdev = dev_get_drvdata(dev); 5523 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5524 5525 if (adapter->state != VNIC_OPEN) 5526 return 0; 5527 5528 tasklet_schedule(&adapter->tasklet); 5529 5530 return 0; 5531 } 5532 5533 static const struct vio_device_id ibmvnic_device_table[] = { 5534 {"network", "IBM,vnic"}, 5535 {"", "" } 5536 }; 5537 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5538 5539 static const struct dev_pm_ops ibmvnic_pm_ops = { 5540 .resume = ibmvnic_resume 5541 }; 5542 5543 static struct vio_driver ibmvnic_driver = { 5544 .id_table = ibmvnic_device_table, 5545 .probe = ibmvnic_probe, 5546 .remove = ibmvnic_remove, 5547 .get_desired_dma = ibmvnic_get_desired_dma, 5548 .name = ibmvnic_driver_name, 5549 .pm = &ibmvnic_pm_ops, 5550 }; 5551 5552 /* module functions */ 5553 static int __init ibmvnic_module_init(void) 5554 { 5555 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5556 IBMVNIC_DRIVER_VERSION); 5557 5558 return vio_register_driver(&ibmvnic_driver); 5559 } 5560 5561 static void __exit ibmvnic_module_exit(void) 5562 { 5563 vio_unregister_driver(&ibmvnic_driver); 5564 } 5565 5566 module_init(ibmvnic_module_init); 5567 module_exit(ibmvnic_module_exit); 5568