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