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(struct ibmvnic_adapter *adapter, u64 remote_handle, 88 union sub_crq *sub_crq); 89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 91 static int enable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int disable_scrq_irq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static int pending_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 98 struct ibmvnic_sub_crq_queue *); 99 static int ibmvnic_poll(struct napi_struct *napi, int data); 100 static void send_query_map(struct ibmvnic_adapter *adapter); 101 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 102 static int send_request_unmap(struct ibmvnic_adapter *, u8); 103 static int send_login(struct ibmvnic_adapter *adapter); 104 static void send_query_cap(struct ibmvnic_adapter *adapter); 105 static int init_sub_crqs(struct ibmvnic_adapter *); 106 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 107 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 108 static void release_crq_queue(struct ibmvnic_adapter *); 109 static int __ibmvnic_set_mac(struct net_device *, u8 *); 110 static int init_crq_queue(struct ibmvnic_adapter *adapter); 111 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 112 113 struct ibmvnic_stat { 114 char name[ETH_GSTRING_LEN]; 115 int offset; 116 }; 117 118 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 119 offsetof(struct ibmvnic_statistics, stat)) 120 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 121 122 static const struct ibmvnic_stat ibmvnic_stats[] = { 123 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 124 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 125 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 126 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 127 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 128 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 129 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 130 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 131 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 132 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 133 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 134 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 135 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 136 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 137 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 138 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 139 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 140 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 141 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 142 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 143 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 144 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 145 }; 146 147 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 148 unsigned long length, unsigned long *number, 149 unsigned long *irq) 150 { 151 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 152 long rc; 153 154 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 155 *number = retbuf[0]; 156 *irq = retbuf[1]; 157 158 return rc; 159 } 160 161 /** 162 * ibmvnic_wait_for_completion - Check device state and wait for completion 163 * @adapter: private device data 164 * @comp_done: completion structure to wait for 165 * @timeout: time to wait in milliseconds 166 * 167 * Wait for a completion signal or until the timeout limit is reached 168 * while checking that the device is still active. 169 */ 170 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 171 struct completion *comp_done, 172 unsigned long timeout) 173 { 174 struct net_device *netdev; 175 unsigned long div_timeout; 176 u8 retry; 177 178 netdev = adapter->netdev; 179 retry = 5; 180 div_timeout = msecs_to_jiffies(timeout / retry); 181 while (true) { 182 if (!adapter->crq.active) { 183 netdev_err(netdev, "Device down!\n"); 184 return -ENODEV; 185 } 186 if (!retry--) 187 break; 188 if (wait_for_completion_timeout(comp_done, div_timeout)) 189 return 0; 190 } 191 netdev_err(netdev, "Operation timed out.\n"); 192 return -ETIMEDOUT; 193 } 194 195 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 196 struct ibmvnic_long_term_buff *ltb, int size) 197 { 198 struct device *dev = &adapter->vdev->dev; 199 int rc; 200 201 ltb->size = size; 202 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 203 GFP_KERNEL); 204 205 if (!ltb->buff) { 206 dev_err(dev, "Couldn't alloc long term buffer\n"); 207 return -ENOMEM; 208 } 209 ltb->map_id = adapter->map_id; 210 adapter->map_id++; 211 212 mutex_lock(&adapter->fw_lock); 213 adapter->fw_done_rc = 0; 214 reinit_completion(&adapter->fw_done); 215 rc = send_request_map(adapter, ltb->addr, 216 ltb->size, ltb->map_id); 217 if (rc) { 218 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 219 mutex_unlock(&adapter->fw_lock); 220 return rc; 221 } 222 223 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 224 if (rc) { 225 dev_err(dev, 226 "Long term map request aborted or timed out,rc = %d\n", 227 rc); 228 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 229 mutex_unlock(&adapter->fw_lock); 230 return rc; 231 } 232 233 if (adapter->fw_done_rc) { 234 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 235 adapter->fw_done_rc); 236 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 237 mutex_unlock(&adapter->fw_lock); 238 return -1; 239 } 240 mutex_unlock(&adapter->fw_lock); 241 return 0; 242 } 243 244 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 245 struct ibmvnic_long_term_buff *ltb) 246 { 247 struct device *dev = &adapter->vdev->dev; 248 249 if (!ltb->buff) 250 return; 251 252 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 253 adapter->reset_reason != VNIC_RESET_MOBILITY) 254 send_request_unmap(adapter, ltb->map_id); 255 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 256 } 257 258 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 259 struct ibmvnic_long_term_buff *ltb) 260 { 261 struct device *dev = &adapter->vdev->dev; 262 int rc; 263 264 memset(ltb->buff, 0, ltb->size); 265 266 mutex_lock(&adapter->fw_lock); 267 adapter->fw_done_rc = 0; 268 269 reinit_completion(&adapter->fw_done); 270 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 271 if (rc) { 272 mutex_unlock(&adapter->fw_lock); 273 return rc; 274 } 275 276 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 277 if (rc) { 278 dev_info(dev, 279 "Reset failed, long term map request timed out or aborted\n"); 280 mutex_unlock(&adapter->fw_lock); 281 return rc; 282 } 283 284 if (adapter->fw_done_rc) { 285 dev_info(dev, 286 "Reset failed, attempting to free and reallocate buffer\n"); 287 free_long_term_buff(adapter, ltb); 288 mutex_unlock(&adapter->fw_lock); 289 return alloc_long_term_buff(adapter, ltb, ltb->size); 290 } 291 mutex_unlock(&adapter->fw_lock); 292 return 0; 293 } 294 295 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 296 { 297 int i; 298 299 for (i = 0; i < adapter->num_active_rx_pools; i++) 300 adapter->rx_pool[i].active = 0; 301 } 302 303 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 304 struct ibmvnic_rx_pool *pool) 305 { 306 int count = pool->size - atomic_read(&pool->available); 307 u64 handle = adapter->rx_scrq[pool->index]->handle; 308 struct device *dev = &adapter->vdev->dev; 309 int buffers_added = 0; 310 unsigned long lpar_rc; 311 union sub_crq sub_crq; 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 for (i = 0; i < count; ++i) { 324 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 325 if (!skb) { 326 dev_err(dev, "Couldn't replenish rx buff\n"); 327 adapter->replenish_no_mem++; 328 break; 329 } 330 331 index = pool->free_map[pool->next_free]; 332 333 if (pool->rx_buff[index].skb) 334 dev_err(dev, "Inconsistent free_map!\n"); 335 336 /* Copy the skb to the long term mapped DMA buffer */ 337 offset = index * pool->buff_size; 338 dst = pool->long_term_buff.buff + offset; 339 memset(dst, 0, pool->buff_size); 340 dma_addr = pool->long_term_buff.addr + offset; 341 pool->rx_buff[index].data = dst; 342 343 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 344 pool->rx_buff[index].dma = dma_addr; 345 pool->rx_buff[index].skb = skb; 346 pool->rx_buff[index].pool_index = pool->index; 347 pool->rx_buff[index].size = pool->buff_size; 348 349 memset(&sub_crq, 0, sizeof(sub_crq)); 350 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 351 sub_crq.rx_add.correlator = 352 cpu_to_be64((u64)&pool->rx_buff[index]); 353 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 354 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 355 356 /* The length field of the sCRQ is defined to be 24 bits so the 357 * buffer size needs to be left shifted by a byte before it is 358 * converted to big endian to prevent the last byte from being 359 * truncated. 360 */ 361 #ifdef __LITTLE_ENDIAN__ 362 shift = 8; 363 #endif 364 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 365 366 lpar_rc = send_subcrq(adapter, handle, &sub_crq); 367 if (lpar_rc != H_SUCCESS) 368 goto failure; 369 370 buffers_added++; 371 adapter->replenish_add_buff_success++; 372 pool->next_free = (pool->next_free + 1) % pool->size; 373 } 374 atomic_add(buffers_added, &pool->available); 375 return; 376 377 failure: 378 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 379 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 380 pool->free_map[pool->next_free] = index; 381 pool->rx_buff[index].skb = NULL; 382 383 dev_kfree_skb_any(skb); 384 adapter->replenish_add_buff_failure++; 385 atomic_add(buffers_added, &pool->available); 386 387 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 388 /* Disable buffer pool replenishment and report carrier off if 389 * queue is closed or pending failover. 390 * Firmware guarantees that a signal will be sent to the 391 * driver, triggering a reset. 392 */ 393 deactivate_rx_pools(adapter); 394 netif_carrier_off(adapter->netdev); 395 } 396 } 397 398 static void replenish_pools(struct ibmvnic_adapter *adapter) 399 { 400 int i; 401 402 adapter->replenish_task_cycles++; 403 for (i = 0; i < adapter->num_active_rx_pools; i++) { 404 if (adapter->rx_pool[i].active) 405 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 406 } 407 } 408 409 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 410 { 411 kfree(adapter->tx_stats_buffers); 412 kfree(adapter->rx_stats_buffers); 413 adapter->tx_stats_buffers = NULL; 414 adapter->rx_stats_buffers = NULL; 415 } 416 417 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 418 { 419 adapter->tx_stats_buffers = 420 kcalloc(IBMVNIC_MAX_QUEUES, 421 sizeof(struct ibmvnic_tx_queue_stats), 422 GFP_KERNEL); 423 if (!adapter->tx_stats_buffers) 424 return -ENOMEM; 425 426 adapter->rx_stats_buffers = 427 kcalloc(IBMVNIC_MAX_QUEUES, 428 sizeof(struct ibmvnic_rx_queue_stats), 429 GFP_KERNEL); 430 if (!adapter->rx_stats_buffers) 431 return -ENOMEM; 432 433 return 0; 434 } 435 436 static void release_stats_token(struct ibmvnic_adapter *adapter) 437 { 438 struct device *dev = &adapter->vdev->dev; 439 440 if (!adapter->stats_token) 441 return; 442 443 dma_unmap_single(dev, adapter->stats_token, 444 sizeof(struct ibmvnic_statistics), 445 DMA_FROM_DEVICE); 446 adapter->stats_token = 0; 447 } 448 449 static int init_stats_token(struct ibmvnic_adapter *adapter) 450 { 451 struct device *dev = &adapter->vdev->dev; 452 dma_addr_t stok; 453 454 stok = dma_map_single(dev, &adapter->stats, 455 sizeof(struct ibmvnic_statistics), 456 DMA_FROM_DEVICE); 457 if (dma_mapping_error(dev, stok)) { 458 dev_err(dev, "Couldn't map stats buffer\n"); 459 return -1; 460 } 461 462 adapter->stats_token = stok; 463 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 464 return 0; 465 } 466 467 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 468 { 469 struct ibmvnic_rx_pool *rx_pool; 470 u64 buff_size; 471 int rx_scrqs; 472 int i, j, rc; 473 474 if (!adapter->rx_pool) 475 return -1; 476 477 buff_size = adapter->cur_rx_buf_sz; 478 rx_scrqs = adapter->num_active_rx_pools; 479 for (i = 0; i < rx_scrqs; i++) { 480 rx_pool = &adapter->rx_pool[i]; 481 482 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 483 484 if (rx_pool->buff_size != buff_size) { 485 free_long_term_buff(adapter, &rx_pool->long_term_buff); 486 rx_pool->buff_size = buff_size; 487 rc = alloc_long_term_buff(adapter, 488 &rx_pool->long_term_buff, 489 rx_pool->size * 490 rx_pool->buff_size); 491 } else { 492 rc = reset_long_term_buff(adapter, 493 &rx_pool->long_term_buff); 494 } 495 496 if (rc) 497 return rc; 498 499 for (j = 0; j < rx_pool->size; j++) 500 rx_pool->free_map[j] = j; 501 502 memset(rx_pool->rx_buff, 0, 503 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 504 505 atomic_set(&rx_pool->available, 0); 506 rx_pool->next_alloc = 0; 507 rx_pool->next_free = 0; 508 rx_pool->active = 1; 509 } 510 511 return 0; 512 } 513 514 static void release_rx_pools(struct ibmvnic_adapter *adapter) 515 { 516 struct ibmvnic_rx_pool *rx_pool; 517 int i, j; 518 519 if (!adapter->rx_pool) 520 return; 521 522 for (i = 0; i < adapter->num_active_rx_pools; i++) { 523 rx_pool = &adapter->rx_pool[i]; 524 525 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 526 527 kfree(rx_pool->free_map); 528 free_long_term_buff(adapter, &rx_pool->long_term_buff); 529 530 if (!rx_pool->rx_buff) 531 continue; 532 533 for (j = 0; j < rx_pool->size; j++) { 534 if (rx_pool->rx_buff[j].skb) { 535 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 536 rx_pool->rx_buff[j].skb = NULL; 537 } 538 } 539 540 kfree(rx_pool->rx_buff); 541 } 542 543 kfree(adapter->rx_pool); 544 adapter->rx_pool = NULL; 545 adapter->num_active_rx_pools = 0; 546 } 547 548 static int init_rx_pools(struct net_device *netdev) 549 { 550 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 551 struct device *dev = &adapter->vdev->dev; 552 struct ibmvnic_rx_pool *rx_pool; 553 int rxadd_subcrqs; 554 u64 buff_size; 555 int i, j; 556 557 rxadd_subcrqs = adapter->num_active_rx_scrqs; 558 buff_size = adapter->cur_rx_buf_sz; 559 560 adapter->rx_pool = kcalloc(rxadd_subcrqs, 561 sizeof(struct ibmvnic_rx_pool), 562 GFP_KERNEL); 563 if (!adapter->rx_pool) { 564 dev_err(dev, "Failed to allocate rx pools\n"); 565 return -1; 566 } 567 568 adapter->num_active_rx_pools = rxadd_subcrqs; 569 570 for (i = 0; i < rxadd_subcrqs; i++) { 571 rx_pool = &adapter->rx_pool[i]; 572 573 netdev_dbg(adapter->netdev, 574 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 575 i, adapter->req_rx_add_entries_per_subcrq, 576 buff_size); 577 578 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 579 rx_pool->index = i; 580 rx_pool->buff_size = buff_size; 581 rx_pool->active = 1; 582 583 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 584 GFP_KERNEL); 585 if (!rx_pool->free_map) { 586 release_rx_pools(adapter); 587 return -1; 588 } 589 590 rx_pool->rx_buff = kcalloc(rx_pool->size, 591 sizeof(struct ibmvnic_rx_buff), 592 GFP_KERNEL); 593 if (!rx_pool->rx_buff) { 594 dev_err(dev, "Couldn't alloc rx buffers\n"); 595 release_rx_pools(adapter); 596 return -1; 597 } 598 599 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 600 rx_pool->size * rx_pool->buff_size)) { 601 release_rx_pools(adapter); 602 return -1; 603 } 604 605 for (j = 0; j < rx_pool->size; ++j) 606 rx_pool->free_map[j] = j; 607 608 atomic_set(&rx_pool->available, 0); 609 rx_pool->next_alloc = 0; 610 rx_pool->next_free = 0; 611 } 612 613 return 0; 614 } 615 616 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 617 struct ibmvnic_tx_pool *tx_pool) 618 { 619 int rc, i; 620 621 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 622 if (rc) 623 return rc; 624 625 memset(tx_pool->tx_buff, 0, 626 tx_pool->num_buffers * 627 sizeof(struct ibmvnic_tx_buff)); 628 629 for (i = 0; i < tx_pool->num_buffers; i++) 630 tx_pool->free_map[i] = i; 631 632 tx_pool->consumer_index = 0; 633 tx_pool->producer_index = 0; 634 635 return 0; 636 } 637 638 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 639 { 640 int tx_scrqs; 641 int i, rc; 642 643 if (!adapter->tx_pool) 644 return -1; 645 646 tx_scrqs = adapter->num_active_tx_pools; 647 for (i = 0; i < tx_scrqs; i++) { 648 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 649 if (rc) 650 return rc; 651 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 652 if (rc) 653 return rc; 654 } 655 656 return 0; 657 } 658 659 static void release_vpd_data(struct ibmvnic_adapter *adapter) 660 { 661 if (!adapter->vpd) 662 return; 663 664 kfree(adapter->vpd->buff); 665 kfree(adapter->vpd); 666 667 adapter->vpd = NULL; 668 } 669 670 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 671 struct ibmvnic_tx_pool *tx_pool) 672 { 673 kfree(tx_pool->tx_buff); 674 kfree(tx_pool->free_map); 675 free_long_term_buff(adapter, &tx_pool->long_term_buff); 676 } 677 678 static void release_tx_pools(struct ibmvnic_adapter *adapter) 679 { 680 int i; 681 682 if (!adapter->tx_pool) 683 return; 684 685 for (i = 0; i < adapter->num_active_tx_pools; i++) { 686 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 687 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 688 } 689 690 kfree(adapter->tx_pool); 691 adapter->tx_pool = NULL; 692 kfree(adapter->tso_pool); 693 adapter->tso_pool = NULL; 694 adapter->num_active_tx_pools = 0; 695 } 696 697 static int init_one_tx_pool(struct net_device *netdev, 698 struct ibmvnic_tx_pool *tx_pool, 699 int num_entries, int buf_size) 700 { 701 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 702 int i; 703 704 tx_pool->tx_buff = kcalloc(num_entries, 705 sizeof(struct ibmvnic_tx_buff), 706 GFP_KERNEL); 707 if (!tx_pool->tx_buff) 708 return -1; 709 710 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 711 num_entries * buf_size)) 712 return -1; 713 714 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 715 if (!tx_pool->free_map) 716 return -1; 717 718 for (i = 0; i < num_entries; i++) 719 tx_pool->free_map[i] = i; 720 721 tx_pool->consumer_index = 0; 722 tx_pool->producer_index = 0; 723 tx_pool->num_buffers = num_entries; 724 tx_pool->buf_size = buf_size; 725 726 return 0; 727 } 728 729 static int init_tx_pools(struct net_device *netdev) 730 { 731 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 732 int tx_subcrqs; 733 int i, rc; 734 735 tx_subcrqs = adapter->num_active_tx_scrqs; 736 adapter->tx_pool = kcalloc(tx_subcrqs, 737 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 738 if (!adapter->tx_pool) 739 return -1; 740 741 adapter->tso_pool = kcalloc(tx_subcrqs, 742 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 743 if (!adapter->tso_pool) 744 return -1; 745 746 adapter->num_active_tx_pools = tx_subcrqs; 747 748 for (i = 0; i < tx_subcrqs; i++) { 749 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 750 adapter->req_tx_entries_per_subcrq, 751 adapter->req_mtu + VLAN_HLEN); 752 if (rc) { 753 release_tx_pools(adapter); 754 return rc; 755 } 756 757 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 758 IBMVNIC_TSO_BUFS, 759 IBMVNIC_TSO_BUF_SZ); 760 if (rc) { 761 release_tx_pools(adapter); 762 return rc; 763 } 764 } 765 766 return 0; 767 } 768 769 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 770 { 771 int i; 772 773 if (adapter->napi_enabled) 774 return; 775 776 for (i = 0; i < adapter->req_rx_queues; i++) 777 napi_enable(&adapter->napi[i]); 778 779 adapter->napi_enabled = true; 780 } 781 782 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 783 { 784 int i; 785 786 if (!adapter->napi_enabled) 787 return; 788 789 for (i = 0; i < adapter->req_rx_queues; i++) { 790 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 791 napi_disable(&adapter->napi[i]); 792 } 793 794 adapter->napi_enabled = false; 795 } 796 797 static int init_napi(struct ibmvnic_adapter *adapter) 798 { 799 int i; 800 801 adapter->napi = kcalloc(adapter->req_rx_queues, 802 sizeof(struct napi_struct), GFP_KERNEL); 803 if (!adapter->napi) 804 return -ENOMEM; 805 806 for (i = 0; i < adapter->req_rx_queues; i++) { 807 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 808 netif_napi_add(adapter->netdev, &adapter->napi[i], 809 ibmvnic_poll, NAPI_POLL_WEIGHT); 810 } 811 812 adapter->num_active_rx_napi = adapter->req_rx_queues; 813 return 0; 814 } 815 816 static void release_napi(struct ibmvnic_adapter *adapter) 817 { 818 int i; 819 820 if (!adapter->napi) 821 return; 822 823 for (i = 0; i < adapter->num_active_rx_napi; i++) { 824 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 825 netif_napi_del(&adapter->napi[i]); 826 } 827 828 kfree(adapter->napi); 829 adapter->napi = NULL; 830 adapter->num_active_rx_napi = 0; 831 adapter->napi_enabled = false; 832 } 833 834 static int ibmvnic_login(struct net_device *netdev) 835 { 836 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 837 unsigned long timeout = msecs_to_jiffies(30000); 838 int retry_count = 0; 839 int retries = 10; 840 bool retry; 841 int rc; 842 843 do { 844 retry = false; 845 if (retry_count > retries) { 846 netdev_warn(netdev, "Login attempts exceeded\n"); 847 return -1; 848 } 849 850 adapter->init_done_rc = 0; 851 reinit_completion(&adapter->init_done); 852 rc = send_login(adapter); 853 if (rc) { 854 netdev_warn(netdev, "Unable to login\n"); 855 return rc; 856 } 857 858 if (!wait_for_completion_timeout(&adapter->init_done, 859 timeout)) { 860 netdev_warn(netdev, "Login timed out, retrying...\n"); 861 retry = true; 862 adapter->init_done_rc = 0; 863 retry_count++; 864 continue; 865 } 866 867 if (adapter->init_done_rc == ABORTED) { 868 netdev_warn(netdev, "Login aborted, retrying...\n"); 869 retry = true; 870 adapter->init_done_rc = 0; 871 retry_count++; 872 /* FW or device may be busy, so 873 * wait a bit before retrying login 874 */ 875 msleep(500); 876 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 877 retry_count++; 878 release_sub_crqs(adapter, 1); 879 880 retry = true; 881 netdev_dbg(netdev, 882 "Received partial success, retrying...\n"); 883 adapter->init_done_rc = 0; 884 reinit_completion(&adapter->init_done); 885 send_query_cap(adapter); 886 if (!wait_for_completion_timeout(&adapter->init_done, 887 timeout)) { 888 netdev_warn(netdev, 889 "Capabilities query timed out\n"); 890 return -1; 891 } 892 893 rc = init_sub_crqs(adapter); 894 if (rc) { 895 netdev_warn(netdev, 896 "SCRQ initialization failed\n"); 897 return -1; 898 } 899 900 rc = init_sub_crq_irqs(adapter); 901 if (rc) { 902 netdev_warn(netdev, 903 "SCRQ irq initialization failed\n"); 904 return -1; 905 } 906 } else if (adapter->init_done_rc) { 907 netdev_warn(netdev, "Adapter login failed\n"); 908 return -1; 909 } 910 } while (retry); 911 912 __ibmvnic_set_mac(netdev, adapter->mac_addr); 913 914 return 0; 915 } 916 917 static void release_login_buffer(struct ibmvnic_adapter *adapter) 918 { 919 kfree(adapter->login_buf); 920 adapter->login_buf = NULL; 921 } 922 923 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 924 { 925 kfree(adapter->login_rsp_buf); 926 adapter->login_rsp_buf = NULL; 927 } 928 929 static void release_resources(struct ibmvnic_adapter *adapter) 930 { 931 release_vpd_data(adapter); 932 933 release_tx_pools(adapter); 934 release_rx_pools(adapter); 935 936 release_napi(adapter); 937 release_login_rsp_buffer(adapter); 938 } 939 940 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 941 { 942 struct net_device *netdev = adapter->netdev; 943 unsigned long timeout = msecs_to_jiffies(30000); 944 union ibmvnic_crq crq; 945 bool resend; 946 int rc; 947 948 netdev_dbg(netdev, "setting link state %d\n", link_state); 949 950 memset(&crq, 0, sizeof(crq)); 951 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 952 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 953 crq.logical_link_state.link_state = link_state; 954 955 do { 956 resend = false; 957 958 reinit_completion(&adapter->init_done); 959 rc = ibmvnic_send_crq(adapter, &crq); 960 if (rc) { 961 netdev_err(netdev, "Failed to set link state\n"); 962 return rc; 963 } 964 965 if (!wait_for_completion_timeout(&adapter->init_done, 966 timeout)) { 967 netdev_err(netdev, "timeout setting link state\n"); 968 return -1; 969 } 970 971 if (adapter->init_done_rc == PARTIALSUCCESS) { 972 /* Partuial success, delay and re-send */ 973 mdelay(1000); 974 resend = true; 975 } else if (adapter->init_done_rc) { 976 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 977 adapter->init_done_rc); 978 return adapter->init_done_rc; 979 } 980 } while (resend); 981 982 return 0; 983 } 984 985 static int set_real_num_queues(struct net_device *netdev) 986 { 987 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 988 int rc; 989 990 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 991 adapter->req_tx_queues, adapter->req_rx_queues); 992 993 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 994 if (rc) { 995 netdev_err(netdev, "failed to set the number of tx queues\n"); 996 return rc; 997 } 998 999 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1000 if (rc) 1001 netdev_err(netdev, "failed to set the number of rx queues\n"); 1002 1003 return rc; 1004 } 1005 1006 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1007 { 1008 struct device *dev = &adapter->vdev->dev; 1009 union ibmvnic_crq crq; 1010 int len = 0; 1011 int rc; 1012 1013 if (adapter->vpd->buff) 1014 len = adapter->vpd->len; 1015 1016 mutex_lock(&adapter->fw_lock); 1017 adapter->fw_done_rc = 0; 1018 reinit_completion(&adapter->fw_done); 1019 1020 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1021 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1022 rc = ibmvnic_send_crq(adapter, &crq); 1023 if (rc) { 1024 mutex_unlock(&adapter->fw_lock); 1025 return rc; 1026 } 1027 1028 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1029 if (rc) { 1030 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1031 mutex_unlock(&adapter->fw_lock); 1032 return rc; 1033 } 1034 mutex_unlock(&adapter->fw_lock); 1035 1036 if (!adapter->vpd->len) 1037 return -ENODATA; 1038 1039 if (!adapter->vpd->buff) 1040 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1041 else if (adapter->vpd->len != len) 1042 adapter->vpd->buff = 1043 krealloc(adapter->vpd->buff, 1044 adapter->vpd->len, GFP_KERNEL); 1045 1046 if (!adapter->vpd->buff) { 1047 dev_err(dev, "Could allocate VPD buffer\n"); 1048 return -ENOMEM; 1049 } 1050 1051 adapter->vpd->dma_addr = 1052 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1053 DMA_FROM_DEVICE); 1054 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1055 dev_err(dev, "Could not map VPD buffer\n"); 1056 kfree(adapter->vpd->buff); 1057 adapter->vpd->buff = NULL; 1058 return -ENOMEM; 1059 } 1060 1061 mutex_lock(&adapter->fw_lock); 1062 adapter->fw_done_rc = 0; 1063 reinit_completion(&adapter->fw_done); 1064 1065 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1066 crq.get_vpd.cmd = GET_VPD; 1067 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1068 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1069 rc = ibmvnic_send_crq(adapter, &crq); 1070 if (rc) { 1071 kfree(adapter->vpd->buff); 1072 adapter->vpd->buff = NULL; 1073 mutex_unlock(&adapter->fw_lock); 1074 return rc; 1075 } 1076 1077 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1078 if (rc) { 1079 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1080 kfree(adapter->vpd->buff); 1081 adapter->vpd->buff = NULL; 1082 mutex_unlock(&adapter->fw_lock); 1083 return rc; 1084 } 1085 1086 mutex_unlock(&adapter->fw_lock); 1087 return 0; 1088 } 1089 1090 static int init_resources(struct ibmvnic_adapter *adapter) 1091 { 1092 struct net_device *netdev = adapter->netdev; 1093 int rc; 1094 1095 rc = set_real_num_queues(netdev); 1096 if (rc) 1097 return rc; 1098 1099 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1100 if (!adapter->vpd) 1101 return -ENOMEM; 1102 1103 /* Vital Product Data (VPD) */ 1104 rc = ibmvnic_get_vpd(adapter); 1105 if (rc) { 1106 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1107 return rc; 1108 } 1109 1110 adapter->map_id = 1; 1111 1112 rc = init_napi(adapter); 1113 if (rc) 1114 return rc; 1115 1116 send_query_map(adapter); 1117 1118 rc = init_rx_pools(netdev); 1119 if (rc) 1120 return rc; 1121 1122 rc = init_tx_pools(netdev); 1123 return rc; 1124 } 1125 1126 static int __ibmvnic_open(struct net_device *netdev) 1127 { 1128 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1129 enum vnic_state prev_state = adapter->state; 1130 int i, rc; 1131 1132 adapter->state = VNIC_OPENING; 1133 replenish_pools(adapter); 1134 ibmvnic_napi_enable(adapter); 1135 1136 /* We're ready to receive frames, enable the sub-crq interrupts and 1137 * set the logical link state to up 1138 */ 1139 for (i = 0; i < adapter->req_rx_queues; i++) { 1140 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1141 if (prev_state == VNIC_CLOSED) 1142 enable_irq(adapter->rx_scrq[i]->irq); 1143 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1144 } 1145 1146 for (i = 0; i < adapter->req_tx_queues; i++) { 1147 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1148 if (prev_state == VNIC_CLOSED) 1149 enable_irq(adapter->tx_scrq[i]->irq); 1150 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1151 } 1152 1153 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1154 if (rc) { 1155 for (i = 0; i < adapter->req_rx_queues; i++) 1156 napi_disable(&adapter->napi[i]); 1157 release_resources(adapter); 1158 return rc; 1159 } 1160 1161 netif_tx_start_all_queues(netdev); 1162 1163 if (prev_state == VNIC_CLOSED) { 1164 for (i = 0; i < adapter->req_rx_queues; i++) 1165 napi_schedule(&adapter->napi[i]); 1166 } 1167 1168 adapter->state = VNIC_OPEN; 1169 return rc; 1170 } 1171 1172 static int ibmvnic_open(struct net_device *netdev) 1173 { 1174 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1175 int rc; 1176 1177 /* If device failover is pending, just set device state and return. 1178 * Device operation will be handled by reset routine. 1179 */ 1180 if (adapter->failover_pending) { 1181 adapter->state = VNIC_OPEN; 1182 return 0; 1183 } 1184 1185 if (adapter->state != VNIC_CLOSED) { 1186 rc = ibmvnic_login(netdev); 1187 if (rc) 1188 goto out; 1189 1190 rc = init_resources(adapter); 1191 if (rc) { 1192 netdev_err(netdev, "failed to initialize resources\n"); 1193 release_resources(adapter); 1194 goto out; 1195 } 1196 } 1197 1198 rc = __ibmvnic_open(netdev); 1199 1200 out: 1201 /* 1202 * If open fails due to a pending failover, set device state and 1203 * return. Device operation will be handled by reset routine. 1204 */ 1205 if (rc && adapter->failover_pending) { 1206 adapter->state = VNIC_OPEN; 1207 rc = 0; 1208 } 1209 return rc; 1210 } 1211 1212 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1213 { 1214 struct ibmvnic_rx_pool *rx_pool; 1215 struct ibmvnic_rx_buff *rx_buff; 1216 u64 rx_entries; 1217 int rx_scrqs; 1218 int i, j; 1219 1220 if (!adapter->rx_pool) 1221 return; 1222 1223 rx_scrqs = adapter->num_active_rx_pools; 1224 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1225 1226 /* Free any remaining skbs in the rx buffer pools */ 1227 for (i = 0; i < rx_scrqs; i++) { 1228 rx_pool = &adapter->rx_pool[i]; 1229 if (!rx_pool || !rx_pool->rx_buff) 1230 continue; 1231 1232 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1233 for (j = 0; j < rx_entries; j++) { 1234 rx_buff = &rx_pool->rx_buff[j]; 1235 if (rx_buff && rx_buff->skb) { 1236 dev_kfree_skb_any(rx_buff->skb); 1237 rx_buff->skb = NULL; 1238 } 1239 } 1240 } 1241 } 1242 1243 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1244 struct ibmvnic_tx_pool *tx_pool) 1245 { 1246 struct ibmvnic_tx_buff *tx_buff; 1247 u64 tx_entries; 1248 int i; 1249 1250 if (!tx_pool || !tx_pool->tx_buff) 1251 return; 1252 1253 tx_entries = tx_pool->num_buffers; 1254 1255 for (i = 0; i < tx_entries; i++) { 1256 tx_buff = &tx_pool->tx_buff[i]; 1257 if (tx_buff && tx_buff->skb) { 1258 dev_kfree_skb_any(tx_buff->skb); 1259 tx_buff->skb = NULL; 1260 } 1261 } 1262 } 1263 1264 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1265 { 1266 int tx_scrqs; 1267 int i; 1268 1269 if (!adapter->tx_pool || !adapter->tso_pool) 1270 return; 1271 1272 tx_scrqs = adapter->num_active_tx_pools; 1273 1274 /* Free any remaining skbs in the tx buffer pools */ 1275 for (i = 0; i < tx_scrqs; i++) { 1276 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1277 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1278 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1279 } 1280 } 1281 1282 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1283 { 1284 struct net_device *netdev = adapter->netdev; 1285 int i; 1286 1287 if (adapter->tx_scrq) { 1288 for (i = 0; i < adapter->req_tx_queues; i++) 1289 if (adapter->tx_scrq[i]->irq) { 1290 netdev_dbg(netdev, 1291 "Disabling tx_scrq[%d] irq\n", i); 1292 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1293 disable_irq(adapter->tx_scrq[i]->irq); 1294 } 1295 } 1296 1297 if (adapter->rx_scrq) { 1298 for (i = 0; i < adapter->req_rx_queues; i++) { 1299 if (adapter->rx_scrq[i]->irq) { 1300 netdev_dbg(netdev, 1301 "Disabling rx_scrq[%d] irq\n", i); 1302 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1303 disable_irq(adapter->rx_scrq[i]->irq); 1304 } 1305 } 1306 } 1307 } 1308 1309 static void ibmvnic_cleanup(struct net_device *netdev) 1310 { 1311 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1312 1313 /* ensure that transmissions are stopped if called by do_reset */ 1314 if (test_bit(0, &adapter->resetting)) 1315 netif_tx_disable(netdev); 1316 else 1317 netif_tx_stop_all_queues(netdev); 1318 1319 ibmvnic_napi_disable(adapter); 1320 ibmvnic_disable_irqs(adapter); 1321 1322 clean_rx_pools(adapter); 1323 clean_tx_pools(adapter); 1324 } 1325 1326 static int __ibmvnic_close(struct net_device *netdev) 1327 { 1328 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1329 int rc = 0; 1330 1331 adapter->state = VNIC_CLOSING; 1332 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1333 if (rc) 1334 return rc; 1335 adapter->state = VNIC_CLOSED; 1336 return 0; 1337 } 1338 1339 static int ibmvnic_close(struct net_device *netdev) 1340 { 1341 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1342 int rc; 1343 1344 /* If device failover is pending, just set device state and return. 1345 * Device operation will be handled by reset routine. 1346 */ 1347 if (adapter->failover_pending) { 1348 adapter->state = VNIC_CLOSED; 1349 return 0; 1350 } 1351 1352 rc = __ibmvnic_close(netdev); 1353 ibmvnic_cleanup(netdev); 1354 1355 return rc; 1356 } 1357 1358 /** 1359 * build_hdr_data - creates L2/L3/L4 header data buffer 1360 * @hdr_field - bitfield determining needed headers 1361 * @skb - socket buffer 1362 * @hdr_len - array of header lengths 1363 * @tot_len - total length of data 1364 * 1365 * Reads hdr_field to determine which headers are needed by firmware. 1366 * Builds a buffer containing these headers. Saves individual header 1367 * lengths and total buffer length to be used to build descriptors. 1368 */ 1369 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1370 int *hdr_len, u8 *hdr_data) 1371 { 1372 int len = 0; 1373 u8 *hdr; 1374 1375 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1376 hdr_len[0] = sizeof(struct vlan_ethhdr); 1377 else 1378 hdr_len[0] = sizeof(struct ethhdr); 1379 1380 if (skb->protocol == htons(ETH_P_IP)) { 1381 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1382 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1383 hdr_len[2] = tcp_hdrlen(skb); 1384 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1385 hdr_len[2] = sizeof(struct udphdr); 1386 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1387 hdr_len[1] = sizeof(struct ipv6hdr); 1388 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1389 hdr_len[2] = tcp_hdrlen(skb); 1390 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1391 hdr_len[2] = sizeof(struct udphdr); 1392 } else if (skb->protocol == htons(ETH_P_ARP)) { 1393 hdr_len[1] = arp_hdr_len(skb->dev); 1394 hdr_len[2] = 0; 1395 } 1396 1397 memset(hdr_data, 0, 120); 1398 if ((hdr_field >> 6) & 1) { 1399 hdr = skb_mac_header(skb); 1400 memcpy(hdr_data, hdr, hdr_len[0]); 1401 len += hdr_len[0]; 1402 } 1403 1404 if ((hdr_field >> 5) & 1) { 1405 hdr = skb_network_header(skb); 1406 memcpy(hdr_data + len, hdr, hdr_len[1]); 1407 len += hdr_len[1]; 1408 } 1409 1410 if ((hdr_field >> 4) & 1) { 1411 hdr = skb_transport_header(skb); 1412 memcpy(hdr_data + len, hdr, hdr_len[2]); 1413 len += hdr_len[2]; 1414 } 1415 return len; 1416 } 1417 1418 /** 1419 * create_hdr_descs - create header and header extension descriptors 1420 * @hdr_field - bitfield determining needed headers 1421 * @data - buffer containing header data 1422 * @len - length of data buffer 1423 * @hdr_len - array of individual header lengths 1424 * @scrq_arr - descriptor array 1425 * 1426 * Creates header and, if needed, header extension descriptors and 1427 * places them in a descriptor array, scrq_arr 1428 */ 1429 1430 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1431 union sub_crq *scrq_arr) 1432 { 1433 union sub_crq hdr_desc; 1434 int tmp_len = len; 1435 int num_descs = 0; 1436 u8 *data, *cur; 1437 int tmp; 1438 1439 while (tmp_len > 0) { 1440 cur = hdr_data + len - tmp_len; 1441 1442 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1443 if (cur != hdr_data) { 1444 data = hdr_desc.hdr_ext.data; 1445 tmp = tmp_len > 29 ? 29 : tmp_len; 1446 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1447 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1448 hdr_desc.hdr_ext.len = tmp; 1449 } else { 1450 data = hdr_desc.hdr.data; 1451 tmp = tmp_len > 24 ? 24 : tmp_len; 1452 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1453 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1454 hdr_desc.hdr.len = tmp; 1455 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1456 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1457 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1458 hdr_desc.hdr.flag = hdr_field << 1; 1459 } 1460 memcpy(data, cur, tmp); 1461 tmp_len -= tmp; 1462 *scrq_arr = hdr_desc; 1463 scrq_arr++; 1464 num_descs++; 1465 } 1466 1467 return num_descs; 1468 } 1469 1470 /** 1471 * build_hdr_descs_arr - build a header descriptor array 1472 * @skb - socket buffer 1473 * @num_entries - number of descriptors to be sent 1474 * @subcrq - first TX descriptor 1475 * @hdr_field - bit field determining which headers will be sent 1476 * 1477 * This function will build a TX descriptor array with applicable 1478 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1479 */ 1480 1481 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1482 int *num_entries, u8 hdr_field) 1483 { 1484 int hdr_len[3] = {0, 0, 0}; 1485 int tot_len; 1486 u8 *hdr_data = txbuff->hdr_data; 1487 1488 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1489 txbuff->hdr_data); 1490 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1491 txbuff->indir_arr + 1); 1492 } 1493 1494 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1495 struct net_device *netdev) 1496 { 1497 /* For some backing devices, mishandling of small packets 1498 * can result in a loss of connection or TX stall. Device 1499 * architects recommend that no packet should be smaller 1500 * than the minimum MTU value provided to the driver, so 1501 * pad any packets to that length 1502 */ 1503 if (skb->len < netdev->min_mtu) 1504 return skb_put_padto(skb, netdev->min_mtu); 1505 1506 return 0; 1507 } 1508 1509 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1510 { 1511 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1512 int queue_num = skb_get_queue_mapping(skb); 1513 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1514 struct device *dev = &adapter->vdev->dev; 1515 struct ibmvnic_tx_buff *tx_buff = NULL; 1516 struct ibmvnic_sub_crq_queue *tx_scrq; 1517 struct ibmvnic_tx_pool *tx_pool; 1518 unsigned int tx_send_failed = 0; 1519 unsigned int tx_map_failed = 0; 1520 unsigned int tx_dropped = 0; 1521 unsigned int tx_packets = 0; 1522 unsigned int tx_bytes = 0; 1523 dma_addr_t data_dma_addr; 1524 struct netdev_queue *txq; 1525 unsigned long lpar_rc; 1526 union sub_crq tx_crq; 1527 unsigned int offset; 1528 int num_entries = 1; 1529 unsigned char *dst; 1530 int index = 0; 1531 u8 proto = 0; 1532 u64 handle; 1533 netdev_tx_t ret = NETDEV_TX_OK; 1534 1535 if (test_bit(0, &adapter->resetting)) { 1536 if (!netif_subqueue_stopped(netdev, skb)) 1537 netif_stop_subqueue(netdev, queue_num); 1538 dev_kfree_skb_any(skb); 1539 1540 tx_send_failed++; 1541 tx_dropped++; 1542 ret = NETDEV_TX_OK; 1543 goto out; 1544 } 1545 1546 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1547 tx_dropped++; 1548 tx_send_failed++; 1549 ret = NETDEV_TX_OK; 1550 goto out; 1551 } 1552 if (skb_is_gso(skb)) 1553 tx_pool = &adapter->tso_pool[queue_num]; 1554 else 1555 tx_pool = &adapter->tx_pool[queue_num]; 1556 1557 tx_scrq = adapter->tx_scrq[queue_num]; 1558 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1559 handle = tx_scrq->handle; 1560 1561 index = tx_pool->free_map[tx_pool->consumer_index]; 1562 1563 if (index == IBMVNIC_INVALID_MAP) { 1564 dev_kfree_skb_any(skb); 1565 tx_send_failed++; 1566 tx_dropped++; 1567 ret = NETDEV_TX_OK; 1568 goto out; 1569 } 1570 1571 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1572 1573 offset = index * tx_pool->buf_size; 1574 dst = tx_pool->long_term_buff.buff + offset; 1575 memset(dst, 0, tx_pool->buf_size); 1576 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1577 1578 if (skb_shinfo(skb)->nr_frags) { 1579 int cur, i; 1580 1581 /* Copy the head */ 1582 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1583 cur = skb_headlen(skb); 1584 1585 /* Copy the frags */ 1586 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1587 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1588 1589 memcpy(dst + cur, 1590 page_address(skb_frag_page(frag)) + 1591 skb_frag_off(frag), skb_frag_size(frag)); 1592 cur += skb_frag_size(frag); 1593 } 1594 } else { 1595 skb_copy_from_linear_data(skb, dst, skb->len); 1596 } 1597 1598 tx_pool->consumer_index = 1599 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1600 1601 tx_buff = &tx_pool->tx_buff[index]; 1602 tx_buff->skb = skb; 1603 tx_buff->data_dma[0] = data_dma_addr; 1604 tx_buff->data_len[0] = skb->len; 1605 tx_buff->index = index; 1606 tx_buff->pool_index = queue_num; 1607 tx_buff->last_frag = true; 1608 1609 memset(&tx_crq, 0, sizeof(tx_crq)); 1610 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1611 tx_crq.v1.type = IBMVNIC_TX_DESC; 1612 tx_crq.v1.n_crq_elem = 1; 1613 tx_crq.v1.n_sge = 1; 1614 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1615 1616 if (skb_is_gso(skb)) 1617 tx_crq.v1.correlator = 1618 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1619 else 1620 tx_crq.v1.correlator = cpu_to_be32(index); 1621 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1622 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1623 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1624 1625 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1626 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1627 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1628 } 1629 1630 if (skb->protocol == htons(ETH_P_IP)) { 1631 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1632 proto = ip_hdr(skb)->protocol; 1633 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1634 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1635 proto = ipv6_hdr(skb)->nexthdr; 1636 } 1637 1638 if (proto == IPPROTO_TCP) 1639 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1640 else if (proto == IPPROTO_UDP) 1641 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1642 1643 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1644 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1645 hdrs += 2; 1646 } 1647 if (skb_is_gso(skb)) { 1648 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1649 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1650 hdrs += 2; 1651 } 1652 /* determine if l2/3/4 headers are sent to firmware */ 1653 if ((*hdrs >> 7) & 1) { 1654 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1655 tx_crq.v1.n_crq_elem = num_entries; 1656 tx_buff->num_entries = num_entries; 1657 tx_buff->indir_arr[0] = tx_crq; 1658 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1659 sizeof(tx_buff->indir_arr), 1660 DMA_TO_DEVICE); 1661 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1662 dev_kfree_skb_any(skb); 1663 tx_buff->skb = NULL; 1664 if (!firmware_has_feature(FW_FEATURE_CMO)) 1665 dev_err(dev, "tx: unable to map descriptor array\n"); 1666 tx_map_failed++; 1667 tx_dropped++; 1668 ret = NETDEV_TX_OK; 1669 goto tx_err_out; 1670 } 1671 lpar_rc = send_subcrq_indirect(adapter, handle, 1672 (u64)tx_buff->indir_dma, 1673 (u64)num_entries); 1674 dma_unmap_single(dev, tx_buff->indir_dma, 1675 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE); 1676 } else { 1677 tx_buff->num_entries = num_entries; 1678 lpar_rc = send_subcrq(adapter, handle, 1679 &tx_crq); 1680 } 1681 if (lpar_rc != H_SUCCESS) { 1682 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1683 dev_err_ratelimited(dev, "tx: send failed\n"); 1684 dev_kfree_skb_any(skb); 1685 tx_buff->skb = NULL; 1686 1687 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1688 /* Disable TX and report carrier off if queue is closed 1689 * or pending failover. 1690 * Firmware guarantees that a signal will be sent to the 1691 * driver, triggering a reset or some other action. 1692 */ 1693 netif_tx_stop_all_queues(netdev); 1694 netif_carrier_off(netdev); 1695 } 1696 1697 tx_send_failed++; 1698 tx_dropped++; 1699 ret = NETDEV_TX_OK; 1700 goto tx_err_out; 1701 } 1702 1703 if (atomic_add_return(num_entries, &tx_scrq->used) 1704 >= adapter->req_tx_entries_per_subcrq) { 1705 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1706 netif_stop_subqueue(netdev, queue_num); 1707 } 1708 1709 tx_packets++; 1710 tx_bytes += skb->len; 1711 txq->trans_start = jiffies; 1712 ret = NETDEV_TX_OK; 1713 goto out; 1714 1715 tx_err_out: 1716 /* roll back consumer index and map array*/ 1717 if (tx_pool->consumer_index == 0) 1718 tx_pool->consumer_index = 1719 tx_pool->num_buffers - 1; 1720 else 1721 tx_pool->consumer_index--; 1722 tx_pool->free_map[tx_pool->consumer_index] = index; 1723 out: 1724 netdev->stats.tx_dropped += tx_dropped; 1725 netdev->stats.tx_bytes += tx_bytes; 1726 netdev->stats.tx_packets += tx_packets; 1727 adapter->tx_send_failed += tx_send_failed; 1728 adapter->tx_map_failed += tx_map_failed; 1729 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1730 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1731 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1732 1733 return ret; 1734 } 1735 1736 static void ibmvnic_set_multi(struct net_device *netdev) 1737 { 1738 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1739 struct netdev_hw_addr *ha; 1740 union ibmvnic_crq crq; 1741 1742 memset(&crq, 0, sizeof(crq)); 1743 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1744 crq.request_capability.cmd = REQUEST_CAPABILITY; 1745 1746 if (netdev->flags & IFF_PROMISC) { 1747 if (!adapter->promisc_supported) 1748 return; 1749 } else { 1750 if (netdev->flags & IFF_ALLMULTI) { 1751 /* Accept all multicast */ 1752 memset(&crq, 0, sizeof(crq)); 1753 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1754 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1755 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1756 ibmvnic_send_crq(adapter, &crq); 1757 } else if (netdev_mc_empty(netdev)) { 1758 /* Reject all multicast */ 1759 memset(&crq, 0, sizeof(crq)); 1760 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1761 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1762 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1763 ibmvnic_send_crq(adapter, &crq); 1764 } else { 1765 /* Accept one or more multicast(s) */ 1766 netdev_for_each_mc_addr(ha, netdev) { 1767 memset(&crq, 0, sizeof(crq)); 1768 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1769 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1770 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1771 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1772 ha->addr); 1773 ibmvnic_send_crq(adapter, &crq); 1774 } 1775 } 1776 } 1777 } 1778 1779 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1780 { 1781 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1782 union ibmvnic_crq crq; 1783 int rc; 1784 1785 if (!is_valid_ether_addr(dev_addr)) { 1786 rc = -EADDRNOTAVAIL; 1787 goto err; 1788 } 1789 1790 memset(&crq, 0, sizeof(crq)); 1791 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1792 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1793 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1794 1795 mutex_lock(&adapter->fw_lock); 1796 adapter->fw_done_rc = 0; 1797 reinit_completion(&adapter->fw_done); 1798 1799 rc = ibmvnic_send_crq(adapter, &crq); 1800 if (rc) { 1801 rc = -EIO; 1802 mutex_unlock(&adapter->fw_lock); 1803 goto err; 1804 } 1805 1806 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1807 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1808 if (rc || adapter->fw_done_rc) { 1809 rc = -EIO; 1810 mutex_unlock(&adapter->fw_lock); 1811 goto err; 1812 } 1813 mutex_unlock(&adapter->fw_lock); 1814 return 0; 1815 err: 1816 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1817 return rc; 1818 } 1819 1820 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1821 { 1822 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1823 struct sockaddr *addr = p; 1824 int rc; 1825 1826 rc = 0; 1827 if (!is_valid_ether_addr(addr->sa_data)) 1828 return -EADDRNOTAVAIL; 1829 1830 if (adapter->state != VNIC_PROBED) { 1831 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1832 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1833 } 1834 1835 return rc; 1836 } 1837 1838 /** 1839 * do_change_param_reset returns zero if we are able to keep processing reset 1840 * events, or non-zero if we hit a fatal error and must halt. 1841 */ 1842 static int do_change_param_reset(struct ibmvnic_adapter *adapter, 1843 struct ibmvnic_rwi *rwi, 1844 u32 reset_state) 1845 { 1846 struct net_device *netdev = adapter->netdev; 1847 int i, rc; 1848 1849 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n", 1850 rwi->reset_reason); 1851 1852 netif_carrier_off(netdev); 1853 adapter->reset_reason = rwi->reset_reason; 1854 1855 ibmvnic_cleanup(netdev); 1856 1857 if (reset_state == VNIC_OPEN) { 1858 rc = __ibmvnic_close(netdev); 1859 if (rc) 1860 return rc; 1861 } 1862 1863 release_resources(adapter); 1864 release_sub_crqs(adapter, 1); 1865 release_crq_queue(adapter); 1866 1867 adapter->state = VNIC_PROBED; 1868 1869 rc = init_crq_queue(adapter); 1870 1871 if (rc) { 1872 netdev_err(adapter->netdev, 1873 "Couldn't initialize crq. rc=%d\n", rc); 1874 return rc; 1875 } 1876 1877 rc = ibmvnic_reset_init(adapter, true); 1878 if (rc) 1879 return IBMVNIC_INIT_FAILED; 1880 1881 /* If the adapter was in PROBE state prior to the reset, 1882 * exit here. 1883 */ 1884 if (reset_state == VNIC_PROBED) 1885 return 0; 1886 1887 rc = ibmvnic_login(netdev); 1888 if (rc) { 1889 adapter->state = reset_state; 1890 return rc; 1891 } 1892 1893 rc = init_resources(adapter); 1894 if (rc) 1895 return rc; 1896 1897 ibmvnic_disable_irqs(adapter); 1898 1899 adapter->state = VNIC_CLOSED; 1900 1901 if (reset_state == VNIC_CLOSED) 1902 return 0; 1903 1904 rc = __ibmvnic_open(netdev); 1905 if (rc) 1906 return IBMVNIC_OPEN_FAILED; 1907 1908 /* refresh device's multicast list */ 1909 ibmvnic_set_multi(netdev); 1910 1911 /* kick napi */ 1912 for (i = 0; i < adapter->req_rx_queues; i++) 1913 napi_schedule(&adapter->napi[i]); 1914 1915 return 0; 1916 } 1917 1918 /** 1919 * do_reset returns zero if we are able to keep processing reset events, or 1920 * non-zero if we hit a fatal error and must halt. 1921 */ 1922 static int do_reset(struct ibmvnic_adapter *adapter, 1923 struct ibmvnic_rwi *rwi, u32 reset_state) 1924 { 1925 u64 old_num_rx_queues, old_num_tx_queues; 1926 u64 old_num_rx_slots, old_num_tx_slots; 1927 struct net_device *netdev = adapter->netdev; 1928 int i, rc; 1929 1930 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1931 rwi->reset_reason); 1932 1933 rtnl_lock(); 1934 /* 1935 * Now that we have the rtnl lock, clear any pending failover. 1936 * This will ensure ibmvnic_open() has either completed or will 1937 * block until failover is complete. 1938 */ 1939 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 1940 adapter->failover_pending = false; 1941 1942 netif_carrier_off(netdev); 1943 adapter->reset_reason = rwi->reset_reason; 1944 1945 old_num_rx_queues = adapter->req_rx_queues; 1946 old_num_tx_queues = adapter->req_tx_queues; 1947 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1948 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1949 1950 ibmvnic_cleanup(netdev); 1951 1952 if (reset_state == VNIC_OPEN && 1953 adapter->reset_reason != VNIC_RESET_MOBILITY && 1954 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1955 adapter->state = VNIC_CLOSING; 1956 1957 /* Release the RTNL lock before link state change and 1958 * re-acquire after the link state change to allow 1959 * linkwatch_event to grab the RTNL lock and run during 1960 * a reset. 1961 */ 1962 rtnl_unlock(); 1963 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1964 rtnl_lock(); 1965 if (rc) 1966 goto out; 1967 1968 if (adapter->state != VNIC_CLOSING) { 1969 rc = -1; 1970 goto out; 1971 } 1972 1973 adapter->state = VNIC_CLOSED; 1974 } 1975 1976 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1977 /* remove the closed state so when we call open it appears 1978 * we are coming from the probed state. 1979 */ 1980 adapter->state = VNIC_PROBED; 1981 1982 if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1983 rc = ibmvnic_reenable_crq_queue(adapter); 1984 release_sub_crqs(adapter, 1); 1985 } else { 1986 rc = ibmvnic_reset_crq(adapter); 1987 if (rc == H_CLOSED || rc == H_SUCCESS) { 1988 rc = vio_enable_interrupts(adapter->vdev); 1989 if (rc) 1990 netdev_err(adapter->netdev, 1991 "Reset failed to enable interrupts. rc=%d\n", 1992 rc); 1993 } 1994 } 1995 1996 if (rc) { 1997 netdev_err(adapter->netdev, 1998 "Reset couldn't initialize crq. rc=%d\n", rc); 1999 goto out; 2000 } 2001 2002 rc = ibmvnic_reset_init(adapter, true); 2003 if (rc) { 2004 rc = IBMVNIC_INIT_FAILED; 2005 goto out; 2006 } 2007 2008 /* If the adapter was in PROBE state prior to the reset, 2009 * exit here. 2010 */ 2011 if (reset_state == VNIC_PROBED) { 2012 rc = 0; 2013 goto out; 2014 } 2015 2016 rc = ibmvnic_login(netdev); 2017 if (rc) { 2018 adapter->state = reset_state; 2019 goto out; 2020 } 2021 2022 if (adapter->req_rx_queues != old_num_rx_queues || 2023 adapter->req_tx_queues != old_num_tx_queues || 2024 adapter->req_rx_add_entries_per_subcrq != 2025 old_num_rx_slots || 2026 adapter->req_tx_entries_per_subcrq != 2027 old_num_tx_slots || 2028 !adapter->rx_pool || 2029 !adapter->tso_pool || 2030 !adapter->tx_pool) { 2031 release_rx_pools(adapter); 2032 release_tx_pools(adapter); 2033 release_napi(adapter); 2034 release_vpd_data(adapter); 2035 2036 rc = init_resources(adapter); 2037 if (rc) 2038 goto out; 2039 2040 } else { 2041 rc = reset_tx_pools(adapter); 2042 if (rc) { 2043 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2044 rc); 2045 goto out; 2046 } 2047 2048 rc = reset_rx_pools(adapter); 2049 if (rc) { 2050 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2051 rc); 2052 goto out; 2053 } 2054 } 2055 ibmvnic_disable_irqs(adapter); 2056 } 2057 adapter->state = VNIC_CLOSED; 2058 2059 if (reset_state == VNIC_CLOSED) { 2060 rc = 0; 2061 goto out; 2062 } 2063 2064 rc = __ibmvnic_open(netdev); 2065 if (rc) { 2066 rc = IBMVNIC_OPEN_FAILED; 2067 goto out; 2068 } 2069 2070 /* refresh device's multicast list */ 2071 ibmvnic_set_multi(netdev); 2072 2073 /* kick napi */ 2074 for (i = 0; i < adapter->req_rx_queues; i++) 2075 napi_schedule(&adapter->napi[i]); 2076 2077 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2078 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2079 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2080 call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev); 2081 } 2082 2083 rc = 0; 2084 2085 out: 2086 rtnl_unlock(); 2087 2088 return rc; 2089 } 2090 2091 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2092 struct ibmvnic_rwi *rwi, u32 reset_state) 2093 { 2094 struct net_device *netdev = adapter->netdev; 2095 int rc; 2096 2097 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2098 rwi->reset_reason); 2099 2100 netif_carrier_off(netdev); 2101 adapter->reset_reason = rwi->reset_reason; 2102 2103 ibmvnic_cleanup(netdev); 2104 release_resources(adapter); 2105 release_sub_crqs(adapter, 0); 2106 release_crq_queue(adapter); 2107 2108 /* remove the closed state so when we call open it appears 2109 * we are coming from the probed state. 2110 */ 2111 adapter->state = VNIC_PROBED; 2112 2113 reinit_completion(&adapter->init_done); 2114 rc = init_crq_queue(adapter); 2115 if (rc) { 2116 netdev_err(adapter->netdev, 2117 "Couldn't initialize crq. rc=%d\n", rc); 2118 return rc; 2119 } 2120 2121 rc = ibmvnic_reset_init(adapter, false); 2122 if (rc) 2123 return rc; 2124 2125 /* If the adapter was in PROBE state prior to the reset, 2126 * exit here. 2127 */ 2128 if (reset_state == VNIC_PROBED) 2129 return 0; 2130 2131 rc = ibmvnic_login(netdev); 2132 if (rc) { 2133 adapter->state = VNIC_PROBED; 2134 return 0; 2135 } 2136 2137 rc = init_resources(adapter); 2138 if (rc) 2139 return rc; 2140 2141 ibmvnic_disable_irqs(adapter); 2142 adapter->state = VNIC_CLOSED; 2143 2144 if (reset_state == VNIC_CLOSED) 2145 return 0; 2146 2147 rc = __ibmvnic_open(netdev); 2148 if (rc) 2149 return IBMVNIC_OPEN_FAILED; 2150 2151 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2152 call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev); 2153 2154 return 0; 2155 } 2156 2157 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2158 { 2159 struct ibmvnic_rwi *rwi; 2160 unsigned long flags; 2161 2162 spin_lock_irqsave(&adapter->rwi_lock, flags); 2163 2164 if (!list_empty(&adapter->rwi_list)) { 2165 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2166 list); 2167 list_del(&rwi->list); 2168 } else { 2169 rwi = NULL; 2170 } 2171 2172 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2173 return rwi; 2174 } 2175 2176 static void free_all_rwi(struct ibmvnic_adapter *adapter) 2177 { 2178 struct ibmvnic_rwi *rwi; 2179 2180 rwi = get_next_rwi(adapter); 2181 while (rwi) { 2182 kfree(rwi); 2183 rwi = get_next_rwi(adapter); 2184 } 2185 } 2186 2187 static void __ibmvnic_reset(struct work_struct *work) 2188 { 2189 struct ibmvnic_rwi *rwi; 2190 struct ibmvnic_adapter *adapter; 2191 bool saved_state = false; 2192 unsigned long flags; 2193 u32 reset_state; 2194 int rc = 0; 2195 2196 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2197 2198 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2199 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2200 IBMVNIC_RESET_DELAY); 2201 return; 2202 } 2203 2204 rwi = get_next_rwi(adapter); 2205 while (rwi) { 2206 spin_lock_irqsave(&adapter->state_lock, flags); 2207 2208 if (adapter->state == VNIC_REMOVING || 2209 adapter->state == VNIC_REMOVED) { 2210 spin_unlock_irqrestore(&adapter->state_lock, flags); 2211 kfree(rwi); 2212 rc = EBUSY; 2213 break; 2214 } 2215 2216 if (!saved_state) { 2217 reset_state = adapter->state; 2218 saved_state = true; 2219 } 2220 spin_unlock_irqrestore(&adapter->state_lock, flags); 2221 2222 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2223 /* CHANGE_PARAM requestor holds rtnl_lock */ 2224 rc = do_change_param_reset(adapter, rwi, reset_state); 2225 } else if (adapter->force_reset_recovery) { 2226 /* 2227 * Since we are doing a hard reset now, clear the 2228 * failover_pending flag so we don't ignore any 2229 * future MOBILITY or other resets. 2230 */ 2231 adapter->failover_pending = false; 2232 2233 /* Transport event occurred during previous reset */ 2234 if (adapter->wait_for_reset) { 2235 /* Previous was CHANGE_PARAM; caller locked */ 2236 adapter->force_reset_recovery = false; 2237 rc = do_hard_reset(adapter, rwi, reset_state); 2238 } else { 2239 rtnl_lock(); 2240 adapter->force_reset_recovery = false; 2241 rc = do_hard_reset(adapter, rwi, reset_state); 2242 rtnl_unlock(); 2243 } 2244 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL && 2245 adapter->from_passive_init)) { 2246 rc = do_reset(adapter, rwi, reset_state); 2247 } 2248 kfree(rwi); 2249 if (rc == IBMVNIC_OPEN_FAILED) { 2250 if (list_empty(&adapter->rwi_list)) 2251 adapter->state = VNIC_CLOSED; 2252 else 2253 adapter->state = reset_state; 2254 rc = 0; 2255 } else if (rc && rc != IBMVNIC_INIT_FAILED && 2256 !adapter->force_reset_recovery) 2257 break; 2258 2259 rwi = get_next_rwi(adapter); 2260 2261 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2262 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2263 adapter->force_reset_recovery = true; 2264 } 2265 2266 if (adapter->wait_for_reset) { 2267 adapter->reset_done_rc = rc; 2268 complete(&adapter->reset_done); 2269 } 2270 2271 if (rc) { 2272 netdev_dbg(adapter->netdev, "Reset failed\n"); 2273 free_all_rwi(adapter); 2274 } 2275 2276 clear_bit_unlock(0, &adapter->resetting); 2277 } 2278 2279 static void __ibmvnic_delayed_reset(struct work_struct *work) 2280 { 2281 struct ibmvnic_adapter *adapter; 2282 2283 adapter = container_of(work, struct ibmvnic_adapter, 2284 ibmvnic_delayed_reset.work); 2285 __ibmvnic_reset(&adapter->ibmvnic_reset); 2286 } 2287 2288 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2289 enum ibmvnic_reset_reason reason) 2290 { 2291 struct list_head *entry, *tmp_entry; 2292 struct ibmvnic_rwi *rwi, *tmp; 2293 struct net_device *netdev = adapter->netdev; 2294 unsigned long flags; 2295 int ret; 2296 2297 /* 2298 * If failover is pending don't schedule any other reset. 2299 * Instead let the failover complete. If there is already a 2300 * a failover reset scheduled, we will detect and drop the 2301 * duplicate reset when walking the ->rwi_list below. 2302 */ 2303 if (adapter->state == VNIC_REMOVING || 2304 adapter->state == VNIC_REMOVED || 2305 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2306 ret = EBUSY; 2307 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2308 goto err; 2309 } 2310 2311 if (adapter->state == VNIC_PROBING) { 2312 netdev_warn(netdev, "Adapter reset during probe\n"); 2313 ret = adapter->init_done_rc = EAGAIN; 2314 goto err; 2315 } 2316 2317 spin_lock_irqsave(&adapter->rwi_lock, flags); 2318 2319 list_for_each(entry, &adapter->rwi_list) { 2320 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2321 if (tmp->reset_reason == reason) { 2322 netdev_dbg(netdev, "Skipping matching reset\n"); 2323 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2324 ret = EBUSY; 2325 goto err; 2326 } 2327 } 2328 2329 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2330 if (!rwi) { 2331 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2332 ibmvnic_close(netdev); 2333 ret = ENOMEM; 2334 goto err; 2335 } 2336 /* if we just received a transport event, 2337 * flush reset queue and process this reset 2338 */ 2339 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2340 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2341 list_del(entry); 2342 } 2343 rwi->reset_reason = reason; 2344 list_add_tail(&rwi->list, &adapter->rwi_list); 2345 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2346 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2347 schedule_work(&adapter->ibmvnic_reset); 2348 2349 return 0; 2350 err: 2351 return -ret; 2352 } 2353 2354 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2355 { 2356 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2357 2358 if (test_bit(0, &adapter->resetting)) { 2359 netdev_err(adapter->netdev, 2360 "Adapter is resetting, skip timeout reset\n"); 2361 return; 2362 } 2363 2364 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2365 } 2366 2367 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2368 struct ibmvnic_rx_buff *rx_buff) 2369 { 2370 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2371 2372 rx_buff->skb = NULL; 2373 2374 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2375 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2376 2377 atomic_dec(&pool->available); 2378 } 2379 2380 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2381 { 2382 struct net_device *netdev = napi->dev; 2383 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2384 int scrq_num = (int)(napi - adapter->napi); 2385 int frames_processed = 0; 2386 2387 restart_poll: 2388 while (frames_processed < budget) { 2389 struct sk_buff *skb; 2390 struct ibmvnic_rx_buff *rx_buff; 2391 union sub_crq *next; 2392 u32 length; 2393 u16 offset; 2394 u8 flags = 0; 2395 2396 if (unlikely(test_bit(0, &adapter->resetting) && 2397 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2398 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2399 napi_complete_done(napi, frames_processed); 2400 return frames_processed; 2401 } 2402 2403 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2404 break; 2405 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2406 rx_buff = 2407 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2408 rx_comp.correlator); 2409 /* do error checking */ 2410 if (next->rx_comp.rc) { 2411 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2412 be16_to_cpu(next->rx_comp.rc)); 2413 /* free the entry */ 2414 next->rx_comp.first = 0; 2415 dev_kfree_skb_any(rx_buff->skb); 2416 remove_buff_from_pool(adapter, rx_buff); 2417 continue; 2418 } else if (!rx_buff->skb) { 2419 /* free the entry */ 2420 next->rx_comp.first = 0; 2421 remove_buff_from_pool(adapter, rx_buff); 2422 continue; 2423 } 2424 2425 length = be32_to_cpu(next->rx_comp.len); 2426 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2427 flags = next->rx_comp.flags; 2428 skb = rx_buff->skb; 2429 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2430 length); 2431 2432 /* VLAN Header has been stripped by the system firmware and 2433 * needs to be inserted by the driver 2434 */ 2435 if (adapter->rx_vlan_header_insertion && 2436 (flags & IBMVNIC_VLAN_STRIPPED)) 2437 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2438 ntohs(next->rx_comp.vlan_tci)); 2439 2440 /* free the entry */ 2441 next->rx_comp.first = 0; 2442 remove_buff_from_pool(adapter, rx_buff); 2443 2444 skb_put(skb, length); 2445 skb->protocol = eth_type_trans(skb, netdev); 2446 skb_record_rx_queue(skb, scrq_num); 2447 2448 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2449 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2450 skb->ip_summed = CHECKSUM_UNNECESSARY; 2451 } 2452 2453 length = skb->len; 2454 napi_gro_receive(napi, skb); /* send it up */ 2455 netdev->stats.rx_packets++; 2456 netdev->stats.rx_bytes += length; 2457 adapter->rx_stats_buffers[scrq_num].packets++; 2458 adapter->rx_stats_buffers[scrq_num].bytes += length; 2459 frames_processed++; 2460 } 2461 2462 if (adapter->state != VNIC_CLOSING) 2463 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2464 2465 if (frames_processed < budget) { 2466 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2467 napi_complete_done(napi, frames_processed); 2468 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2469 napi_reschedule(napi)) { 2470 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2471 goto restart_poll; 2472 } 2473 } 2474 return frames_processed; 2475 } 2476 2477 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2478 { 2479 int rc, ret; 2480 2481 adapter->fallback.mtu = adapter->req_mtu; 2482 adapter->fallback.rx_queues = adapter->req_rx_queues; 2483 adapter->fallback.tx_queues = adapter->req_tx_queues; 2484 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2485 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2486 2487 reinit_completion(&adapter->reset_done); 2488 adapter->wait_for_reset = true; 2489 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2490 2491 if (rc) { 2492 ret = rc; 2493 goto out; 2494 } 2495 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2496 if (rc) { 2497 ret = -ENODEV; 2498 goto out; 2499 } 2500 2501 ret = 0; 2502 if (adapter->reset_done_rc) { 2503 ret = -EIO; 2504 adapter->desired.mtu = adapter->fallback.mtu; 2505 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2506 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2507 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2508 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2509 2510 reinit_completion(&adapter->reset_done); 2511 adapter->wait_for_reset = true; 2512 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2513 if (rc) { 2514 ret = rc; 2515 goto out; 2516 } 2517 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2518 60000); 2519 if (rc) { 2520 ret = -ENODEV; 2521 goto out; 2522 } 2523 } 2524 out: 2525 adapter->wait_for_reset = false; 2526 2527 return ret; 2528 } 2529 2530 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2531 { 2532 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2533 2534 adapter->desired.mtu = new_mtu + ETH_HLEN; 2535 2536 return wait_for_reset(adapter); 2537 } 2538 2539 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2540 struct net_device *dev, 2541 netdev_features_t features) 2542 { 2543 /* Some backing hardware adapters can not 2544 * handle packets with a MSS less than 224 2545 * or with only one segment. 2546 */ 2547 if (skb_is_gso(skb)) { 2548 if (skb_shinfo(skb)->gso_size < 224 || 2549 skb_shinfo(skb)->gso_segs == 1) 2550 features &= ~NETIF_F_GSO_MASK; 2551 } 2552 2553 return features; 2554 } 2555 2556 static const struct net_device_ops ibmvnic_netdev_ops = { 2557 .ndo_open = ibmvnic_open, 2558 .ndo_stop = ibmvnic_close, 2559 .ndo_start_xmit = ibmvnic_xmit, 2560 .ndo_set_rx_mode = ibmvnic_set_multi, 2561 .ndo_set_mac_address = ibmvnic_set_mac, 2562 .ndo_validate_addr = eth_validate_addr, 2563 .ndo_tx_timeout = ibmvnic_tx_timeout, 2564 .ndo_change_mtu = ibmvnic_change_mtu, 2565 .ndo_features_check = ibmvnic_features_check, 2566 }; 2567 2568 /* ethtool functions */ 2569 2570 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2571 struct ethtool_link_ksettings *cmd) 2572 { 2573 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2574 int rc; 2575 2576 rc = send_query_phys_parms(adapter); 2577 if (rc) { 2578 adapter->speed = SPEED_UNKNOWN; 2579 adapter->duplex = DUPLEX_UNKNOWN; 2580 } 2581 cmd->base.speed = adapter->speed; 2582 cmd->base.duplex = adapter->duplex; 2583 cmd->base.port = PORT_FIBRE; 2584 cmd->base.phy_address = 0; 2585 cmd->base.autoneg = AUTONEG_ENABLE; 2586 2587 return 0; 2588 } 2589 2590 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2591 struct ethtool_drvinfo *info) 2592 { 2593 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2594 2595 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2596 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2597 strlcpy(info->fw_version, adapter->fw_version, 2598 sizeof(info->fw_version)); 2599 } 2600 2601 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2602 { 2603 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2604 2605 return adapter->msg_enable; 2606 } 2607 2608 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2609 { 2610 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2611 2612 adapter->msg_enable = data; 2613 } 2614 2615 static u32 ibmvnic_get_link(struct net_device *netdev) 2616 { 2617 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2618 2619 /* Don't need to send a query because we request a logical link up at 2620 * init and then we wait for link state indications 2621 */ 2622 return adapter->logical_link_state; 2623 } 2624 2625 static void ibmvnic_get_ringparam(struct net_device *netdev, 2626 struct ethtool_ringparam *ring) 2627 { 2628 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2629 2630 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2631 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2632 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2633 } else { 2634 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2635 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2636 } 2637 ring->rx_mini_max_pending = 0; 2638 ring->rx_jumbo_max_pending = 0; 2639 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2640 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2641 ring->rx_mini_pending = 0; 2642 ring->rx_jumbo_pending = 0; 2643 } 2644 2645 static int ibmvnic_set_ringparam(struct net_device *netdev, 2646 struct ethtool_ringparam *ring) 2647 { 2648 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2649 int ret; 2650 2651 ret = 0; 2652 adapter->desired.rx_entries = ring->rx_pending; 2653 adapter->desired.tx_entries = ring->tx_pending; 2654 2655 ret = wait_for_reset(adapter); 2656 2657 if (!ret && 2658 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2659 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2660 netdev_info(netdev, 2661 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2662 ring->rx_pending, ring->tx_pending, 2663 adapter->req_rx_add_entries_per_subcrq, 2664 adapter->req_tx_entries_per_subcrq); 2665 return ret; 2666 } 2667 2668 static void ibmvnic_get_channels(struct net_device *netdev, 2669 struct ethtool_channels *channels) 2670 { 2671 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2672 2673 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2674 channels->max_rx = adapter->max_rx_queues; 2675 channels->max_tx = adapter->max_tx_queues; 2676 } else { 2677 channels->max_rx = IBMVNIC_MAX_QUEUES; 2678 channels->max_tx = IBMVNIC_MAX_QUEUES; 2679 } 2680 2681 channels->max_other = 0; 2682 channels->max_combined = 0; 2683 channels->rx_count = adapter->req_rx_queues; 2684 channels->tx_count = adapter->req_tx_queues; 2685 channels->other_count = 0; 2686 channels->combined_count = 0; 2687 } 2688 2689 static int ibmvnic_set_channels(struct net_device *netdev, 2690 struct ethtool_channels *channels) 2691 { 2692 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2693 int ret; 2694 2695 ret = 0; 2696 adapter->desired.rx_queues = channels->rx_count; 2697 adapter->desired.tx_queues = channels->tx_count; 2698 2699 ret = wait_for_reset(adapter); 2700 2701 if (!ret && 2702 (adapter->req_rx_queues != channels->rx_count || 2703 adapter->req_tx_queues != channels->tx_count)) 2704 netdev_info(netdev, 2705 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2706 channels->rx_count, channels->tx_count, 2707 adapter->req_rx_queues, adapter->req_tx_queues); 2708 return ret; 2709 2710 } 2711 2712 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2713 { 2714 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2715 int i; 2716 2717 switch (stringset) { 2718 case ETH_SS_STATS: 2719 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2720 i++, data += ETH_GSTRING_LEN) 2721 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2722 2723 for (i = 0; i < adapter->req_tx_queues; i++) { 2724 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2725 data += ETH_GSTRING_LEN; 2726 2727 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2728 data += ETH_GSTRING_LEN; 2729 2730 snprintf(data, ETH_GSTRING_LEN, 2731 "tx%d_dropped_packets", i); 2732 data += ETH_GSTRING_LEN; 2733 } 2734 2735 for (i = 0; i < adapter->req_rx_queues; i++) { 2736 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2737 data += ETH_GSTRING_LEN; 2738 2739 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2740 data += ETH_GSTRING_LEN; 2741 2742 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2743 data += ETH_GSTRING_LEN; 2744 } 2745 break; 2746 2747 case ETH_SS_PRIV_FLAGS: 2748 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2749 strcpy(data + i * ETH_GSTRING_LEN, 2750 ibmvnic_priv_flags[i]); 2751 break; 2752 default: 2753 return; 2754 } 2755 } 2756 2757 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2758 { 2759 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2760 2761 switch (sset) { 2762 case ETH_SS_STATS: 2763 return ARRAY_SIZE(ibmvnic_stats) + 2764 adapter->req_tx_queues * NUM_TX_STATS + 2765 adapter->req_rx_queues * NUM_RX_STATS; 2766 case ETH_SS_PRIV_FLAGS: 2767 return ARRAY_SIZE(ibmvnic_priv_flags); 2768 default: 2769 return -EOPNOTSUPP; 2770 } 2771 } 2772 2773 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2774 struct ethtool_stats *stats, u64 *data) 2775 { 2776 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2777 union ibmvnic_crq crq; 2778 int i, j; 2779 int rc; 2780 2781 memset(&crq, 0, sizeof(crq)); 2782 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2783 crq.request_statistics.cmd = REQUEST_STATISTICS; 2784 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2785 crq.request_statistics.len = 2786 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2787 2788 /* Wait for data to be written */ 2789 reinit_completion(&adapter->stats_done); 2790 rc = ibmvnic_send_crq(adapter, &crq); 2791 if (rc) 2792 return; 2793 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2794 if (rc) 2795 return; 2796 2797 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2798 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2799 ibmvnic_stats[i].offset)); 2800 2801 for (j = 0; j < adapter->req_tx_queues; j++) { 2802 data[i] = adapter->tx_stats_buffers[j].packets; 2803 i++; 2804 data[i] = adapter->tx_stats_buffers[j].bytes; 2805 i++; 2806 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2807 i++; 2808 } 2809 2810 for (j = 0; j < adapter->req_rx_queues; j++) { 2811 data[i] = adapter->rx_stats_buffers[j].packets; 2812 i++; 2813 data[i] = adapter->rx_stats_buffers[j].bytes; 2814 i++; 2815 data[i] = adapter->rx_stats_buffers[j].interrupts; 2816 i++; 2817 } 2818 } 2819 2820 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2821 { 2822 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2823 2824 return adapter->priv_flags; 2825 } 2826 2827 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2828 { 2829 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2830 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2831 2832 if (which_maxes) 2833 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2834 else 2835 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2836 2837 return 0; 2838 } 2839 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2840 .get_drvinfo = ibmvnic_get_drvinfo, 2841 .get_msglevel = ibmvnic_get_msglevel, 2842 .set_msglevel = ibmvnic_set_msglevel, 2843 .get_link = ibmvnic_get_link, 2844 .get_ringparam = ibmvnic_get_ringparam, 2845 .set_ringparam = ibmvnic_set_ringparam, 2846 .get_channels = ibmvnic_get_channels, 2847 .set_channels = ibmvnic_set_channels, 2848 .get_strings = ibmvnic_get_strings, 2849 .get_sset_count = ibmvnic_get_sset_count, 2850 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2851 .get_link_ksettings = ibmvnic_get_link_ksettings, 2852 .get_priv_flags = ibmvnic_get_priv_flags, 2853 .set_priv_flags = ibmvnic_set_priv_flags, 2854 }; 2855 2856 /* Routines for managing CRQs/sCRQs */ 2857 2858 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2859 struct ibmvnic_sub_crq_queue *scrq) 2860 { 2861 int rc; 2862 2863 if (scrq->irq) { 2864 free_irq(scrq->irq, scrq); 2865 irq_dispose_mapping(scrq->irq); 2866 scrq->irq = 0; 2867 } 2868 2869 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2870 atomic_set(&scrq->used, 0); 2871 scrq->cur = 0; 2872 2873 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2874 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2875 return rc; 2876 } 2877 2878 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2879 { 2880 int i, rc; 2881 2882 if (!adapter->tx_scrq || !adapter->rx_scrq) 2883 return -EINVAL; 2884 2885 for (i = 0; i < adapter->req_tx_queues; i++) { 2886 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2887 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2888 if (rc) 2889 return rc; 2890 } 2891 2892 for (i = 0; i < adapter->req_rx_queues; i++) { 2893 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2894 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2895 if (rc) 2896 return rc; 2897 } 2898 2899 return rc; 2900 } 2901 2902 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2903 struct ibmvnic_sub_crq_queue *scrq, 2904 bool do_h_free) 2905 { 2906 struct device *dev = &adapter->vdev->dev; 2907 long rc; 2908 2909 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2910 2911 if (do_h_free) { 2912 /* Close the sub-crqs */ 2913 do { 2914 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2915 adapter->vdev->unit_address, 2916 scrq->crq_num); 2917 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2918 2919 if (rc) { 2920 netdev_err(adapter->netdev, 2921 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2922 scrq->crq_num, rc); 2923 } 2924 } 2925 2926 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2927 DMA_BIDIRECTIONAL); 2928 free_pages((unsigned long)scrq->msgs, 2); 2929 kfree(scrq); 2930 } 2931 2932 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2933 *adapter) 2934 { 2935 struct device *dev = &adapter->vdev->dev; 2936 struct ibmvnic_sub_crq_queue *scrq; 2937 int rc; 2938 2939 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2940 if (!scrq) 2941 return NULL; 2942 2943 scrq->msgs = 2944 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2945 if (!scrq->msgs) { 2946 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2947 goto zero_page_failed; 2948 } 2949 2950 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2951 DMA_BIDIRECTIONAL); 2952 if (dma_mapping_error(dev, scrq->msg_token)) { 2953 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2954 goto map_failed; 2955 } 2956 2957 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2958 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2959 2960 if (rc == H_RESOURCE) 2961 rc = ibmvnic_reset_crq(adapter); 2962 2963 if (rc == H_CLOSED) { 2964 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2965 } else if (rc) { 2966 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2967 goto reg_failed; 2968 } 2969 2970 scrq->adapter = adapter; 2971 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2972 spin_lock_init(&scrq->lock); 2973 2974 netdev_dbg(adapter->netdev, 2975 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2976 scrq->crq_num, scrq->hw_irq, scrq->irq); 2977 2978 return scrq; 2979 2980 reg_failed: 2981 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2982 DMA_BIDIRECTIONAL); 2983 map_failed: 2984 free_pages((unsigned long)scrq->msgs, 2); 2985 zero_page_failed: 2986 kfree(scrq); 2987 2988 return NULL; 2989 } 2990 2991 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2992 { 2993 int i; 2994 2995 if (adapter->tx_scrq) { 2996 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2997 if (!adapter->tx_scrq[i]) 2998 continue; 2999 3000 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 3001 i); 3002 if (adapter->tx_scrq[i]->irq) { 3003 free_irq(adapter->tx_scrq[i]->irq, 3004 adapter->tx_scrq[i]); 3005 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 3006 adapter->tx_scrq[i]->irq = 0; 3007 } 3008 3009 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 3010 do_h_free); 3011 } 3012 3013 kfree(adapter->tx_scrq); 3014 adapter->tx_scrq = NULL; 3015 adapter->num_active_tx_scrqs = 0; 3016 } 3017 3018 if (adapter->rx_scrq) { 3019 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3020 if (!adapter->rx_scrq[i]) 3021 continue; 3022 3023 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3024 i); 3025 if (adapter->rx_scrq[i]->irq) { 3026 free_irq(adapter->rx_scrq[i]->irq, 3027 adapter->rx_scrq[i]); 3028 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3029 adapter->rx_scrq[i]->irq = 0; 3030 } 3031 3032 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3033 do_h_free); 3034 } 3035 3036 kfree(adapter->rx_scrq); 3037 adapter->rx_scrq = NULL; 3038 adapter->num_active_rx_scrqs = 0; 3039 } 3040 } 3041 3042 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3043 struct ibmvnic_sub_crq_queue *scrq) 3044 { 3045 struct device *dev = &adapter->vdev->dev; 3046 unsigned long rc; 3047 3048 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3049 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3050 if (rc) 3051 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3052 scrq->hw_irq, rc); 3053 return rc; 3054 } 3055 3056 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3057 struct ibmvnic_sub_crq_queue *scrq) 3058 { 3059 struct device *dev = &adapter->vdev->dev; 3060 unsigned long rc; 3061 3062 if (scrq->hw_irq > 0x100000000ULL) { 3063 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3064 return 1; 3065 } 3066 3067 if (test_bit(0, &adapter->resetting) && 3068 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3069 u64 val = (0xff000000) | scrq->hw_irq; 3070 3071 rc = plpar_hcall_norets(H_EOI, val); 3072 /* H_EOI would fail with rc = H_FUNCTION when running 3073 * in XIVE mode which is expected, but not an error. 3074 */ 3075 if (rc && (rc != H_FUNCTION)) 3076 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3077 val, rc); 3078 } 3079 3080 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3081 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3082 if (rc) 3083 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3084 scrq->hw_irq, rc); 3085 return rc; 3086 } 3087 3088 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3089 struct ibmvnic_sub_crq_queue *scrq) 3090 { 3091 struct device *dev = &adapter->vdev->dev; 3092 struct ibmvnic_tx_pool *tx_pool; 3093 struct ibmvnic_tx_buff *txbuff; 3094 union sub_crq *next; 3095 int index; 3096 int i, j; 3097 3098 restart_loop: 3099 while (pending_scrq(adapter, scrq)) { 3100 unsigned int pool = scrq->pool_index; 3101 int num_entries = 0; 3102 3103 next = ibmvnic_next_scrq(adapter, scrq); 3104 for (i = 0; i < next->tx_comp.num_comps; i++) { 3105 if (next->tx_comp.rcs[i]) { 3106 dev_err(dev, "tx error %x\n", 3107 next->tx_comp.rcs[i]); 3108 continue; 3109 } 3110 index = be32_to_cpu(next->tx_comp.correlators[i]); 3111 if (index & IBMVNIC_TSO_POOL_MASK) { 3112 tx_pool = &adapter->tso_pool[pool]; 3113 index &= ~IBMVNIC_TSO_POOL_MASK; 3114 } else { 3115 tx_pool = &adapter->tx_pool[pool]; 3116 } 3117 3118 txbuff = &tx_pool->tx_buff[index]; 3119 3120 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 3121 if (!txbuff->data_dma[j]) 3122 continue; 3123 3124 txbuff->data_dma[j] = 0; 3125 } 3126 3127 if (txbuff->last_frag) { 3128 dev_kfree_skb_any(txbuff->skb); 3129 txbuff->skb = NULL; 3130 } 3131 3132 num_entries += txbuff->num_entries; 3133 3134 tx_pool->free_map[tx_pool->producer_index] = index; 3135 tx_pool->producer_index = 3136 (tx_pool->producer_index + 1) % 3137 tx_pool->num_buffers; 3138 } 3139 /* remove tx_comp scrq*/ 3140 next->tx_comp.first = 0; 3141 3142 if (atomic_sub_return(num_entries, &scrq->used) <= 3143 (adapter->req_tx_entries_per_subcrq / 2) && 3144 __netif_subqueue_stopped(adapter->netdev, 3145 scrq->pool_index)) { 3146 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3147 netdev_dbg(adapter->netdev, "Started queue %d\n", 3148 scrq->pool_index); 3149 } 3150 } 3151 3152 enable_scrq_irq(adapter, scrq); 3153 3154 if (pending_scrq(adapter, scrq)) { 3155 disable_scrq_irq(adapter, scrq); 3156 goto restart_loop; 3157 } 3158 3159 return 0; 3160 } 3161 3162 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3163 { 3164 struct ibmvnic_sub_crq_queue *scrq = instance; 3165 struct ibmvnic_adapter *adapter = scrq->adapter; 3166 3167 disable_scrq_irq(adapter, scrq); 3168 ibmvnic_complete_tx(adapter, scrq); 3169 3170 return IRQ_HANDLED; 3171 } 3172 3173 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3174 { 3175 struct ibmvnic_sub_crq_queue *scrq = instance; 3176 struct ibmvnic_adapter *adapter = scrq->adapter; 3177 3178 /* When booting a kdump kernel we can hit pending interrupts 3179 * prior to completing driver initialization. 3180 */ 3181 if (unlikely(adapter->state != VNIC_OPEN)) 3182 return IRQ_NONE; 3183 3184 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3185 3186 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3187 disable_scrq_irq(adapter, scrq); 3188 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3189 } 3190 3191 return IRQ_HANDLED; 3192 } 3193 3194 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3195 { 3196 struct device *dev = &adapter->vdev->dev; 3197 struct ibmvnic_sub_crq_queue *scrq; 3198 int i = 0, j = 0; 3199 int rc = 0; 3200 3201 for (i = 0; i < adapter->req_tx_queues; i++) { 3202 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3203 i); 3204 scrq = adapter->tx_scrq[i]; 3205 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3206 3207 if (!scrq->irq) { 3208 rc = -EINVAL; 3209 dev_err(dev, "Error mapping irq\n"); 3210 goto req_tx_irq_failed; 3211 } 3212 3213 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3214 adapter->vdev->unit_address, i); 3215 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3216 0, scrq->name, scrq); 3217 3218 if (rc) { 3219 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3220 scrq->irq, rc); 3221 irq_dispose_mapping(scrq->irq); 3222 goto req_tx_irq_failed; 3223 } 3224 } 3225 3226 for (i = 0; i < adapter->req_rx_queues; i++) { 3227 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3228 i); 3229 scrq = adapter->rx_scrq[i]; 3230 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3231 if (!scrq->irq) { 3232 rc = -EINVAL; 3233 dev_err(dev, "Error mapping irq\n"); 3234 goto req_rx_irq_failed; 3235 } 3236 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3237 adapter->vdev->unit_address, i); 3238 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3239 0, scrq->name, scrq); 3240 if (rc) { 3241 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3242 scrq->irq, rc); 3243 irq_dispose_mapping(scrq->irq); 3244 goto req_rx_irq_failed; 3245 } 3246 } 3247 return rc; 3248 3249 req_rx_irq_failed: 3250 for (j = 0; j < i; j++) { 3251 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3252 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3253 } 3254 i = adapter->req_tx_queues; 3255 req_tx_irq_failed: 3256 for (j = 0; j < i; j++) { 3257 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3258 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3259 } 3260 release_sub_crqs(adapter, 1); 3261 return rc; 3262 } 3263 3264 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3265 { 3266 struct device *dev = &adapter->vdev->dev; 3267 struct ibmvnic_sub_crq_queue **allqueues; 3268 int registered_queues = 0; 3269 int total_queues; 3270 int more = 0; 3271 int i; 3272 3273 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3274 3275 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3276 if (!allqueues) 3277 return -1; 3278 3279 for (i = 0; i < total_queues; i++) { 3280 allqueues[i] = init_sub_crq_queue(adapter); 3281 if (!allqueues[i]) { 3282 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3283 break; 3284 } 3285 registered_queues++; 3286 } 3287 3288 /* Make sure we were able to register the minimum number of queues */ 3289 if (registered_queues < 3290 adapter->min_tx_queues + adapter->min_rx_queues) { 3291 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3292 goto tx_failed; 3293 } 3294 3295 /* Distribute the failed allocated queues*/ 3296 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3297 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3298 switch (i % 3) { 3299 case 0: 3300 if (adapter->req_rx_queues > adapter->min_rx_queues) 3301 adapter->req_rx_queues--; 3302 else 3303 more++; 3304 break; 3305 case 1: 3306 if (adapter->req_tx_queues > adapter->min_tx_queues) 3307 adapter->req_tx_queues--; 3308 else 3309 more++; 3310 break; 3311 } 3312 } 3313 3314 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3315 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3316 if (!adapter->tx_scrq) 3317 goto tx_failed; 3318 3319 for (i = 0; i < adapter->req_tx_queues; i++) { 3320 adapter->tx_scrq[i] = allqueues[i]; 3321 adapter->tx_scrq[i]->pool_index = i; 3322 adapter->num_active_tx_scrqs++; 3323 } 3324 3325 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3326 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3327 if (!adapter->rx_scrq) 3328 goto rx_failed; 3329 3330 for (i = 0; i < adapter->req_rx_queues; i++) { 3331 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3332 adapter->rx_scrq[i]->scrq_num = i; 3333 adapter->num_active_rx_scrqs++; 3334 } 3335 3336 kfree(allqueues); 3337 return 0; 3338 3339 rx_failed: 3340 kfree(adapter->tx_scrq); 3341 adapter->tx_scrq = NULL; 3342 tx_failed: 3343 for (i = 0; i < registered_queues; i++) 3344 release_sub_crq_queue(adapter, allqueues[i], 1); 3345 kfree(allqueues); 3346 return -1; 3347 } 3348 3349 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3350 { 3351 struct device *dev = &adapter->vdev->dev; 3352 union ibmvnic_crq crq; 3353 int max_entries; 3354 3355 if (!retry) { 3356 /* Sub-CRQ entries are 32 byte long */ 3357 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3358 3359 if (adapter->min_tx_entries_per_subcrq > entries_page || 3360 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3361 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3362 return; 3363 } 3364 3365 if (adapter->desired.mtu) 3366 adapter->req_mtu = adapter->desired.mtu; 3367 else 3368 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3369 3370 if (!adapter->desired.tx_entries) 3371 adapter->desired.tx_entries = 3372 adapter->max_tx_entries_per_subcrq; 3373 if (!adapter->desired.rx_entries) 3374 adapter->desired.rx_entries = 3375 adapter->max_rx_add_entries_per_subcrq; 3376 3377 max_entries = IBMVNIC_MAX_LTB_SIZE / 3378 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3379 3380 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3381 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3382 adapter->desired.tx_entries = max_entries; 3383 } 3384 3385 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3386 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3387 adapter->desired.rx_entries = max_entries; 3388 } 3389 3390 if (adapter->desired.tx_entries) 3391 adapter->req_tx_entries_per_subcrq = 3392 adapter->desired.tx_entries; 3393 else 3394 adapter->req_tx_entries_per_subcrq = 3395 adapter->max_tx_entries_per_subcrq; 3396 3397 if (adapter->desired.rx_entries) 3398 adapter->req_rx_add_entries_per_subcrq = 3399 adapter->desired.rx_entries; 3400 else 3401 adapter->req_rx_add_entries_per_subcrq = 3402 adapter->max_rx_add_entries_per_subcrq; 3403 3404 if (adapter->desired.tx_queues) 3405 adapter->req_tx_queues = 3406 adapter->desired.tx_queues; 3407 else 3408 adapter->req_tx_queues = 3409 adapter->opt_tx_comp_sub_queues; 3410 3411 if (adapter->desired.rx_queues) 3412 adapter->req_rx_queues = 3413 adapter->desired.rx_queues; 3414 else 3415 adapter->req_rx_queues = 3416 adapter->opt_rx_comp_queues; 3417 3418 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3419 } 3420 3421 memset(&crq, 0, sizeof(crq)); 3422 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3423 crq.request_capability.cmd = REQUEST_CAPABILITY; 3424 3425 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3426 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3427 atomic_inc(&adapter->running_cap_crqs); 3428 ibmvnic_send_crq(adapter, &crq); 3429 3430 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3431 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3432 atomic_inc(&adapter->running_cap_crqs); 3433 ibmvnic_send_crq(adapter, &crq); 3434 3435 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3436 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3437 atomic_inc(&adapter->running_cap_crqs); 3438 ibmvnic_send_crq(adapter, &crq); 3439 3440 crq.request_capability.capability = 3441 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3442 crq.request_capability.number = 3443 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3444 atomic_inc(&adapter->running_cap_crqs); 3445 ibmvnic_send_crq(adapter, &crq); 3446 3447 crq.request_capability.capability = 3448 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3449 crq.request_capability.number = 3450 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3451 atomic_inc(&adapter->running_cap_crqs); 3452 ibmvnic_send_crq(adapter, &crq); 3453 3454 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3455 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3456 atomic_inc(&adapter->running_cap_crqs); 3457 ibmvnic_send_crq(adapter, &crq); 3458 3459 if (adapter->netdev->flags & IFF_PROMISC) { 3460 if (adapter->promisc_supported) { 3461 crq.request_capability.capability = 3462 cpu_to_be16(PROMISC_REQUESTED); 3463 crq.request_capability.number = cpu_to_be64(1); 3464 atomic_inc(&adapter->running_cap_crqs); 3465 ibmvnic_send_crq(adapter, &crq); 3466 } 3467 } else { 3468 crq.request_capability.capability = 3469 cpu_to_be16(PROMISC_REQUESTED); 3470 crq.request_capability.number = cpu_to_be64(0); 3471 atomic_inc(&adapter->running_cap_crqs); 3472 ibmvnic_send_crq(adapter, &crq); 3473 } 3474 } 3475 3476 static int pending_scrq(struct ibmvnic_adapter *adapter, 3477 struct ibmvnic_sub_crq_queue *scrq) 3478 { 3479 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3480 3481 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3482 return 1; 3483 else 3484 return 0; 3485 } 3486 3487 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3488 struct ibmvnic_sub_crq_queue *scrq) 3489 { 3490 union sub_crq *entry; 3491 unsigned long flags; 3492 3493 spin_lock_irqsave(&scrq->lock, flags); 3494 entry = &scrq->msgs[scrq->cur]; 3495 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3496 if (++scrq->cur == scrq->size) 3497 scrq->cur = 0; 3498 } else { 3499 entry = NULL; 3500 } 3501 spin_unlock_irqrestore(&scrq->lock, flags); 3502 3503 return entry; 3504 } 3505 3506 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3507 { 3508 struct ibmvnic_crq_queue *queue = &adapter->crq; 3509 union ibmvnic_crq *crq; 3510 3511 crq = &queue->msgs[queue->cur]; 3512 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3513 if (++queue->cur == queue->size) 3514 queue->cur = 0; 3515 } else { 3516 crq = NULL; 3517 } 3518 3519 return crq; 3520 } 3521 3522 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3523 { 3524 switch (rc) { 3525 case H_PARAMETER: 3526 dev_warn_ratelimited(dev, 3527 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3528 func, rc); 3529 break; 3530 case H_CLOSED: 3531 dev_warn_ratelimited(dev, 3532 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3533 func, rc); 3534 break; 3535 default: 3536 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3537 break; 3538 } 3539 } 3540 3541 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3542 union sub_crq *sub_crq) 3543 { 3544 unsigned int ua = adapter->vdev->unit_address; 3545 struct device *dev = &adapter->vdev->dev; 3546 u64 *u64_crq = (u64 *)sub_crq; 3547 int rc; 3548 3549 netdev_dbg(adapter->netdev, 3550 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3551 (unsigned long int)cpu_to_be64(remote_handle), 3552 (unsigned long int)cpu_to_be64(u64_crq[0]), 3553 (unsigned long int)cpu_to_be64(u64_crq[1]), 3554 (unsigned long int)cpu_to_be64(u64_crq[2]), 3555 (unsigned long int)cpu_to_be64(u64_crq[3])); 3556 3557 /* Make sure the hypervisor sees the complete request */ 3558 mb(); 3559 3560 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3561 cpu_to_be64(remote_handle), 3562 cpu_to_be64(u64_crq[0]), 3563 cpu_to_be64(u64_crq[1]), 3564 cpu_to_be64(u64_crq[2]), 3565 cpu_to_be64(u64_crq[3])); 3566 3567 if (rc) 3568 print_subcrq_error(dev, rc, __func__); 3569 3570 return rc; 3571 } 3572 3573 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3574 u64 remote_handle, u64 ioba, u64 num_entries) 3575 { 3576 unsigned int ua = adapter->vdev->unit_address; 3577 struct device *dev = &adapter->vdev->dev; 3578 int rc; 3579 3580 /* Make sure the hypervisor sees the complete request */ 3581 mb(); 3582 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3583 cpu_to_be64(remote_handle), 3584 ioba, num_entries); 3585 3586 if (rc) 3587 print_subcrq_error(dev, rc, __func__); 3588 3589 return rc; 3590 } 3591 3592 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3593 union ibmvnic_crq *crq) 3594 { 3595 unsigned int ua = adapter->vdev->unit_address; 3596 struct device *dev = &adapter->vdev->dev; 3597 u64 *u64_crq = (u64 *)crq; 3598 int rc; 3599 3600 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3601 (unsigned long int)cpu_to_be64(u64_crq[0]), 3602 (unsigned long int)cpu_to_be64(u64_crq[1])); 3603 3604 if (!adapter->crq.active && 3605 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3606 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3607 return -EINVAL; 3608 } 3609 3610 /* Make sure the hypervisor sees the complete request */ 3611 mb(); 3612 3613 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3614 cpu_to_be64(u64_crq[0]), 3615 cpu_to_be64(u64_crq[1])); 3616 3617 if (rc) { 3618 if (rc == H_CLOSED) { 3619 dev_warn(dev, "CRQ Queue closed\n"); 3620 /* do not reset, report the fail, wait for passive init from server */ 3621 } 3622 3623 dev_warn(dev, "Send error (rc=%d)\n", rc); 3624 } 3625 3626 return rc; 3627 } 3628 3629 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3630 { 3631 struct device *dev = &adapter->vdev->dev; 3632 union ibmvnic_crq crq; 3633 int retries = 100; 3634 int rc; 3635 3636 memset(&crq, 0, sizeof(crq)); 3637 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3638 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3639 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3640 3641 do { 3642 rc = ibmvnic_send_crq(adapter, &crq); 3643 if (rc != H_CLOSED) 3644 break; 3645 retries--; 3646 msleep(50); 3647 3648 } while (retries > 0); 3649 3650 if (rc) { 3651 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3652 return rc; 3653 } 3654 3655 return 0; 3656 } 3657 3658 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3659 { 3660 union ibmvnic_crq crq; 3661 3662 memset(&crq, 0, sizeof(crq)); 3663 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3664 crq.version_exchange.cmd = VERSION_EXCHANGE; 3665 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3666 3667 return ibmvnic_send_crq(adapter, &crq); 3668 } 3669 3670 struct vnic_login_client_data { 3671 u8 type; 3672 __be16 len; 3673 char name[]; 3674 } __packed; 3675 3676 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3677 { 3678 int len; 3679 3680 /* Calculate the amount of buffer space needed for the 3681 * vnic client data in the login buffer. There are four entries, 3682 * OS name, LPAR name, device name, and a null last entry. 3683 */ 3684 len = 4 * sizeof(struct vnic_login_client_data); 3685 len += 6; /* "Linux" plus NULL */ 3686 len += strlen(utsname()->nodename) + 1; 3687 len += strlen(adapter->netdev->name) + 1; 3688 3689 return len; 3690 } 3691 3692 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3693 struct vnic_login_client_data *vlcd) 3694 { 3695 const char *os_name = "Linux"; 3696 int len; 3697 3698 /* Type 1 - LPAR OS */ 3699 vlcd->type = 1; 3700 len = strlen(os_name) + 1; 3701 vlcd->len = cpu_to_be16(len); 3702 strncpy(vlcd->name, os_name, len); 3703 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3704 3705 /* Type 2 - LPAR name */ 3706 vlcd->type = 2; 3707 len = strlen(utsname()->nodename) + 1; 3708 vlcd->len = cpu_to_be16(len); 3709 strncpy(vlcd->name, utsname()->nodename, len); 3710 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3711 3712 /* Type 3 - device name */ 3713 vlcd->type = 3; 3714 len = strlen(adapter->netdev->name) + 1; 3715 vlcd->len = cpu_to_be16(len); 3716 strncpy(vlcd->name, adapter->netdev->name, len); 3717 } 3718 3719 static int send_login(struct ibmvnic_adapter *adapter) 3720 { 3721 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3722 struct ibmvnic_login_buffer *login_buffer; 3723 struct device *dev = &adapter->vdev->dev; 3724 dma_addr_t rsp_buffer_token; 3725 dma_addr_t buffer_token; 3726 size_t rsp_buffer_size; 3727 union ibmvnic_crq crq; 3728 size_t buffer_size; 3729 __be64 *tx_list_p; 3730 __be64 *rx_list_p; 3731 int client_data_len; 3732 struct vnic_login_client_data *vlcd; 3733 int i; 3734 3735 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3736 netdev_err(adapter->netdev, 3737 "RX or TX queues are not allocated, device login failed\n"); 3738 return -1; 3739 } 3740 3741 release_login_rsp_buffer(adapter); 3742 client_data_len = vnic_client_data_len(adapter); 3743 3744 buffer_size = 3745 sizeof(struct ibmvnic_login_buffer) + 3746 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3747 client_data_len; 3748 3749 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3750 if (!login_buffer) 3751 goto buf_alloc_failed; 3752 3753 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3754 DMA_TO_DEVICE); 3755 if (dma_mapping_error(dev, buffer_token)) { 3756 dev_err(dev, "Couldn't map login buffer\n"); 3757 goto buf_map_failed; 3758 } 3759 3760 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3761 sizeof(u64) * adapter->req_tx_queues + 3762 sizeof(u64) * adapter->req_rx_queues + 3763 sizeof(u64) * adapter->req_rx_queues + 3764 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3765 3766 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3767 if (!login_rsp_buffer) 3768 goto buf_rsp_alloc_failed; 3769 3770 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3771 rsp_buffer_size, DMA_FROM_DEVICE); 3772 if (dma_mapping_error(dev, rsp_buffer_token)) { 3773 dev_err(dev, "Couldn't map login rsp buffer\n"); 3774 goto buf_rsp_map_failed; 3775 } 3776 3777 adapter->login_buf = login_buffer; 3778 adapter->login_buf_token = buffer_token; 3779 adapter->login_buf_sz = buffer_size; 3780 adapter->login_rsp_buf = login_rsp_buffer; 3781 adapter->login_rsp_buf_token = rsp_buffer_token; 3782 adapter->login_rsp_buf_sz = rsp_buffer_size; 3783 3784 login_buffer->len = cpu_to_be32(buffer_size); 3785 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3786 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3787 login_buffer->off_txcomp_subcrqs = 3788 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3789 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3790 login_buffer->off_rxcomp_subcrqs = 3791 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3792 sizeof(u64) * adapter->req_tx_queues); 3793 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3794 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3795 3796 tx_list_p = (__be64 *)((char *)login_buffer + 3797 sizeof(struct ibmvnic_login_buffer)); 3798 rx_list_p = (__be64 *)((char *)login_buffer + 3799 sizeof(struct ibmvnic_login_buffer) + 3800 sizeof(u64) * adapter->req_tx_queues); 3801 3802 for (i = 0; i < adapter->req_tx_queues; i++) { 3803 if (adapter->tx_scrq[i]) { 3804 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3805 crq_num); 3806 } 3807 } 3808 3809 for (i = 0; i < adapter->req_rx_queues; i++) { 3810 if (adapter->rx_scrq[i]) { 3811 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3812 crq_num); 3813 } 3814 } 3815 3816 /* Insert vNIC login client data */ 3817 vlcd = (struct vnic_login_client_data *) 3818 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3819 login_buffer->client_data_offset = 3820 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3821 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3822 3823 vnic_add_client_data(adapter, vlcd); 3824 3825 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3826 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3827 netdev_dbg(adapter->netdev, "%016lx\n", 3828 ((unsigned long int *)(adapter->login_buf))[i]); 3829 } 3830 3831 memset(&crq, 0, sizeof(crq)); 3832 crq.login.first = IBMVNIC_CRQ_CMD; 3833 crq.login.cmd = LOGIN; 3834 crq.login.ioba = cpu_to_be32(buffer_token); 3835 crq.login.len = cpu_to_be32(buffer_size); 3836 ibmvnic_send_crq(adapter, &crq); 3837 3838 return 0; 3839 3840 buf_rsp_map_failed: 3841 kfree(login_rsp_buffer); 3842 buf_rsp_alloc_failed: 3843 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3844 buf_map_failed: 3845 kfree(login_buffer); 3846 buf_alloc_failed: 3847 return -1; 3848 } 3849 3850 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3851 u32 len, u8 map_id) 3852 { 3853 union ibmvnic_crq crq; 3854 3855 memset(&crq, 0, sizeof(crq)); 3856 crq.request_map.first = IBMVNIC_CRQ_CMD; 3857 crq.request_map.cmd = REQUEST_MAP; 3858 crq.request_map.map_id = map_id; 3859 crq.request_map.ioba = cpu_to_be32(addr); 3860 crq.request_map.len = cpu_to_be32(len); 3861 return ibmvnic_send_crq(adapter, &crq); 3862 } 3863 3864 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3865 { 3866 union ibmvnic_crq crq; 3867 3868 memset(&crq, 0, sizeof(crq)); 3869 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3870 crq.request_unmap.cmd = REQUEST_UNMAP; 3871 crq.request_unmap.map_id = map_id; 3872 return ibmvnic_send_crq(adapter, &crq); 3873 } 3874 3875 static void send_query_map(struct ibmvnic_adapter *adapter) 3876 { 3877 union ibmvnic_crq crq; 3878 3879 memset(&crq, 0, sizeof(crq)); 3880 crq.query_map.first = IBMVNIC_CRQ_CMD; 3881 crq.query_map.cmd = QUERY_MAP; 3882 ibmvnic_send_crq(adapter, &crq); 3883 } 3884 3885 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3886 static void send_query_cap(struct ibmvnic_adapter *adapter) 3887 { 3888 union ibmvnic_crq crq; 3889 3890 atomic_set(&adapter->running_cap_crqs, 0); 3891 memset(&crq, 0, sizeof(crq)); 3892 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3893 crq.query_capability.cmd = QUERY_CAPABILITY; 3894 3895 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3896 atomic_inc(&adapter->running_cap_crqs); 3897 ibmvnic_send_crq(adapter, &crq); 3898 3899 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3900 atomic_inc(&adapter->running_cap_crqs); 3901 ibmvnic_send_crq(adapter, &crq); 3902 3903 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3904 atomic_inc(&adapter->running_cap_crqs); 3905 ibmvnic_send_crq(adapter, &crq); 3906 3907 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3908 atomic_inc(&adapter->running_cap_crqs); 3909 ibmvnic_send_crq(adapter, &crq); 3910 3911 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3912 atomic_inc(&adapter->running_cap_crqs); 3913 ibmvnic_send_crq(adapter, &crq); 3914 3915 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3916 atomic_inc(&adapter->running_cap_crqs); 3917 ibmvnic_send_crq(adapter, &crq); 3918 3919 crq.query_capability.capability = 3920 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3921 atomic_inc(&adapter->running_cap_crqs); 3922 ibmvnic_send_crq(adapter, &crq); 3923 3924 crq.query_capability.capability = 3925 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3926 atomic_inc(&adapter->running_cap_crqs); 3927 ibmvnic_send_crq(adapter, &crq); 3928 3929 crq.query_capability.capability = 3930 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3931 atomic_inc(&adapter->running_cap_crqs); 3932 ibmvnic_send_crq(adapter, &crq); 3933 3934 crq.query_capability.capability = 3935 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3936 atomic_inc(&adapter->running_cap_crqs); 3937 ibmvnic_send_crq(adapter, &crq); 3938 3939 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3940 atomic_inc(&adapter->running_cap_crqs); 3941 ibmvnic_send_crq(adapter, &crq); 3942 3943 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3944 atomic_inc(&adapter->running_cap_crqs); 3945 ibmvnic_send_crq(adapter, &crq); 3946 3947 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3948 atomic_inc(&adapter->running_cap_crqs); 3949 ibmvnic_send_crq(adapter, &crq); 3950 3951 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3952 atomic_inc(&adapter->running_cap_crqs); 3953 ibmvnic_send_crq(adapter, &crq); 3954 3955 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3956 atomic_inc(&adapter->running_cap_crqs); 3957 ibmvnic_send_crq(adapter, &crq); 3958 3959 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3960 atomic_inc(&adapter->running_cap_crqs); 3961 ibmvnic_send_crq(adapter, &crq); 3962 3963 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3964 atomic_inc(&adapter->running_cap_crqs); 3965 ibmvnic_send_crq(adapter, &crq); 3966 3967 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3968 atomic_inc(&adapter->running_cap_crqs); 3969 ibmvnic_send_crq(adapter, &crq); 3970 3971 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3972 atomic_inc(&adapter->running_cap_crqs); 3973 ibmvnic_send_crq(adapter, &crq); 3974 3975 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3976 atomic_inc(&adapter->running_cap_crqs); 3977 ibmvnic_send_crq(adapter, &crq); 3978 3979 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3980 atomic_inc(&adapter->running_cap_crqs); 3981 ibmvnic_send_crq(adapter, &crq); 3982 3983 crq.query_capability.capability = 3984 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3985 atomic_inc(&adapter->running_cap_crqs); 3986 ibmvnic_send_crq(adapter, &crq); 3987 3988 crq.query_capability.capability = 3989 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3990 atomic_inc(&adapter->running_cap_crqs); 3991 ibmvnic_send_crq(adapter, &crq); 3992 3993 crq.query_capability.capability = 3994 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3995 atomic_inc(&adapter->running_cap_crqs); 3996 ibmvnic_send_crq(adapter, &crq); 3997 3998 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3999 atomic_inc(&adapter->running_cap_crqs); 4000 ibmvnic_send_crq(adapter, &crq); 4001 } 4002 4003 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 4004 { 4005 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4006 struct device *dev = &adapter->vdev->dev; 4007 union ibmvnic_crq crq; 4008 4009 adapter->ip_offload_tok = 4010 dma_map_single(dev, 4011 &adapter->ip_offload_buf, 4012 buf_sz, 4013 DMA_FROM_DEVICE); 4014 4015 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4016 if (!firmware_has_feature(FW_FEATURE_CMO)) 4017 dev_err(dev, "Couldn't map offload buffer\n"); 4018 return; 4019 } 4020 4021 memset(&crq, 0, sizeof(crq)); 4022 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4023 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4024 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4025 crq.query_ip_offload.ioba = 4026 cpu_to_be32(adapter->ip_offload_tok); 4027 4028 ibmvnic_send_crq(adapter, &crq); 4029 } 4030 4031 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4032 { 4033 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4034 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4035 struct device *dev = &adapter->vdev->dev; 4036 netdev_features_t old_hw_features = 0; 4037 union ibmvnic_crq crq; 4038 4039 adapter->ip_offload_ctrl_tok = 4040 dma_map_single(dev, 4041 ctrl_buf, 4042 sizeof(adapter->ip_offload_ctrl), 4043 DMA_TO_DEVICE); 4044 4045 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4046 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4047 return; 4048 } 4049 4050 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4051 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4052 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4053 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4054 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4055 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4056 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4057 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4058 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4059 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4060 4061 /* large_rx disabled for now, additional features needed */ 4062 ctrl_buf->large_rx_ipv4 = 0; 4063 ctrl_buf->large_rx_ipv6 = 0; 4064 4065 if (adapter->state != VNIC_PROBING) { 4066 old_hw_features = adapter->netdev->hw_features; 4067 adapter->netdev->hw_features = 0; 4068 } 4069 4070 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4071 4072 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4073 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4074 4075 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4076 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4077 4078 if ((adapter->netdev->features & 4079 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4080 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4081 4082 if (buf->large_tx_ipv4) 4083 adapter->netdev->hw_features |= NETIF_F_TSO; 4084 if (buf->large_tx_ipv6) 4085 adapter->netdev->hw_features |= NETIF_F_TSO6; 4086 4087 if (adapter->state == VNIC_PROBING) { 4088 adapter->netdev->features |= adapter->netdev->hw_features; 4089 } else if (old_hw_features != adapter->netdev->hw_features) { 4090 netdev_features_t tmp = 0; 4091 4092 /* disable features no longer supported */ 4093 adapter->netdev->features &= adapter->netdev->hw_features; 4094 /* turn on features now supported if previously enabled */ 4095 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4096 adapter->netdev->hw_features; 4097 adapter->netdev->features |= 4098 tmp & adapter->netdev->wanted_features; 4099 } 4100 4101 memset(&crq, 0, sizeof(crq)); 4102 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4103 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4104 crq.control_ip_offload.len = 4105 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4106 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4107 ibmvnic_send_crq(adapter, &crq); 4108 } 4109 4110 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4111 struct ibmvnic_adapter *adapter) 4112 { 4113 struct device *dev = &adapter->vdev->dev; 4114 4115 if (crq->get_vpd_size_rsp.rc.code) { 4116 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4117 crq->get_vpd_size_rsp.rc.code); 4118 complete(&adapter->fw_done); 4119 return; 4120 } 4121 4122 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4123 complete(&adapter->fw_done); 4124 } 4125 4126 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4127 struct ibmvnic_adapter *adapter) 4128 { 4129 struct device *dev = &adapter->vdev->dev; 4130 unsigned char *substr = NULL; 4131 u8 fw_level_len = 0; 4132 4133 memset(adapter->fw_version, 0, 32); 4134 4135 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4136 DMA_FROM_DEVICE); 4137 4138 if (crq->get_vpd_rsp.rc.code) { 4139 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4140 crq->get_vpd_rsp.rc.code); 4141 goto complete; 4142 } 4143 4144 /* get the position of the firmware version info 4145 * located after the ASCII 'RM' substring in the buffer 4146 */ 4147 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4148 if (!substr) { 4149 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4150 goto complete; 4151 } 4152 4153 /* get length of firmware level ASCII substring */ 4154 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4155 fw_level_len = *(substr + 2); 4156 } else { 4157 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4158 goto complete; 4159 } 4160 4161 /* copy firmware version string from vpd into adapter */ 4162 if ((substr + 3 + fw_level_len) < 4163 (adapter->vpd->buff + adapter->vpd->len)) { 4164 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4165 } else { 4166 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4167 } 4168 4169 complete: 4170 if (adapter->fw_version[0] == '\0') 4171 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4172 complete(&adapter->fw_done); 4173 } 4174 4175 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4176 { 4177 struct device *dev = &adapter->vdev->dev; 4178 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4179 int i; 4180 4181 dma_unmap_single(dev, adapter->ip_offload_tok, 4182 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4183 4184 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4185 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4186 netdev_dbg(adapter->netdev, "%016lx\n", 4187 ((unsigned long int *)(buf))[i]); 4188 4189 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4190 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4191 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4192 buf->tcp_ipv4_chksum); 4193 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4194 buf->tcp_ipv6_chksum); 4195 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4196 buf->udp_ipv4_chksum); 4197 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4198 buf->udp_ipv6_chksum); 4199 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4200 buf->large_tx_ipv4); 4201 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4202 buf->large_tx_ipv6); 4203 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4204 buf->large_rx_ipv4); 4205 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4206 buf->large_rx_ipv6); 4207 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4208 buf->max_ipv4_header_size); 4209 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4210 buf->max_ipv6_header_size); 4211 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4212 buf->max_tcp_header_size); 4213 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4214 buf->max_udp_header_size); 4215 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4216 buf->max_large_tx_size); 4217 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4218 buf->max_large_rx_size); 4219 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4220 buf->ipv6_extension_header); 4221 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4222 buf->tcp_pseudosum_req); 4223 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4224 buf->num_ipv6_ext_headers); 4225 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4226 buf->off_ipv6_ext_headers); 4227 4228 send_control_ip_offload(adapter); 4229 } 4230 4231 static const char *ibmvnic_fw_err_cause(u16 cause) 4232 { 4233 switch (cause) { 4234 case ADAPTER_PROBLEM: 4235 return "adapter problem"; 4236 case BUS_PROBLEM: 4237 return "bus problem"; 4238 case FW_PROBLEM: 4239 return "firmware problem"; 4240 case DD_PROBLEM: 4241 return "device driver problem"; 4242 case EEH_RECOVERY: 4243 return "EEH recovery"; 4244 case FW_UPDATED: 4245 return "firmware updated"; 4246 case LOW_MEMORY: 4247 return "low Memory"; 4248 default: 4249 return "unknown"; 4250 } 4251 } 4252 4253 static void handle_error_indication(union ibmvnic_crq *crq, 4254 struct ibmvnic_adapter *adapter) 4255 { 4256 struct device *dev = &adapter->vdev->dev; 4257 u16 cause; 4258 4259 cause = be16_to_cpu(crq->error_indication.error_cause); 4260 4261 dev_warn_ratelimited(dev, 4262 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4263 crq->error_indication.flags 4264 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4265 ibmvnic_fw_err_cause(cause)); 4266 4267 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4268 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4269 else 4270 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4271 } 4272 4273 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4274 struct ibmvnic_adapter *adapter) 4275 { 4276 struct net_device *netdev = adapter->netdev; 4277 struct device *dev = &adapter->vdev->dev; 4278 long rc; 4279 4280 rc = crq->change_mac_addr_rsp.rc.code; 4281 if (rc) { 4282 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4283 goto out; 4284 } 4285 /* crq->change_mac_addr.mac_addr is the requested one 4286 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4287 */ 4288 ether_addr_copy(netdev->dev_addr, 4289 &crq->change_mac_addr_rsp.mac_addr[0]); 4290 ether_addr_copy(adapter->mac_addr, 4291 &crq->change_mac_addr_rsp.mac_addr[0]); 4292 out: 4293 complete(&adapter->fw_done); 4294 return rc; 4295 } 4296 4297 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4298 struct ibmvnic_adapter *adapter) 4299 { 4300 struct device *dev = &adapter->vdev->dev; 4301 u64 *req_value; 4302 char *name; 4303 4304 atomic_dec(&adapter->running_cap_crqs); 4305 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4306 case REQ_TX_QUEUES: 4307 req_value = &adapter->req_tx_queues; 4308 name = "tx"; 4309 break; 4310 case REQ_RX_QUEUES: 4311 req_value = &adapter->req_rx_queues; 4312 name = "rx"; 4313 break; 4314 case REQ_RX_ADD_QUEUES: 4315 req_value = &adapter->req_rx_add_queues; 4316 name = "rx_add"; 4317 break; 4318 case REQ_TX_ENTRIES_PER_SUBCRQ: 4319 req_value = &adapter->req_tx_entries_per_subcrq; 4320 name = "tx_entries_per_subcrq"; 4321 break; 4322 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4323 req_value = &adapter->req_rx_add_entries_per_subcrq; 4324 name = "rx_add_entries_per_subcrq"; 4325 break; 4326 case REQ_MTU: 4327 req_value = &adapter->req_mtu; 4328 name = "mtu"; 4329 break; 4330 case PROMISC_REQUESTED: 4331 req_value = &adapter->promisc; 4332 name = "promisc"; 4333 break; 4334 default: 4335 dev_err(dev, "Got invalid cap request rsp %d\n", 4336 crq->request_capability.capability); 4337 return; 4338 } 4339 4340 switch (crq->request_capability_rsp.rc.code) { 4341 case SUCCESS: 4342 break; 4343 case PARTIALSUCCESS: 4344 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4345 *req_value, 4346 (long int)be64_to_cpu(crq->request_capability_rsp. 4347 number), name); 4348 4349 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4350 REQ_MTU) { 4351 pr_err("mtu of %llu is not supported. Reverting.\n", 4352 *req_value); 4353 *req_value = adapter->fallback.mtu; 4354 } else { 4355 *req_value = 4356 be64_to_cpu(crq->request_capability_rsp.number); 4357 } 4358 4359 send_request_cap(adapter, 1); 4360 return; 4361 default: 4362 dev_err(dev, "Error %d in request cap rsp\n", 4363 crq->request_capability_rsp.rc.code); 4364 return; 4365 } 4366 4367 /* Done receiving requested capabilities, query IP offload support */ 4368 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4369 adapter->wait_capability = false; 4370 send_query_ip_offload(adapter); 4371 } 4372 } 4373 4374 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4375 struct ibmvnic_adapter *adapter) 4376 { 4377 struct device *dev = &adapter->vdev->dev; 4378 struct net_device *netdev = adapter->netdev; 4379 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4380 struct ibmvnic_login_buffer *login = adapter->login_buf; 4381 u64 *tx_handle_array; 4382 u64 *rx_handle_array; 4383 int num_tx_pools; 4384 int num_rx_pools; 4385 u64 *size_array; 4386 int i; 4387 4388 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4389 DMA_TO_DEVICE); 4390 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4391 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4392 4393 /* If the number of queues requested can't be allocated by the 4394 * server, the login response will return with code 1. We will need 4395 * to resend the login buffer with fewer queues requested. 4396 */ 4397 if (login_rsp_crq->generic.rc.code) { 4398 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4399 complete(&adapter->init_done); 4400 return 0; 4401 } 4402 4403 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4404 4405 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4406 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4407 netdev_dbg(adapter->netdev, "%016lx\n", 4408 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4409 } 4410 4411 /* Sanity checks */ 4412 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4413 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4414 adapter->req_rx_add_queues != 4415 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4416 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4417 ibmvnic_remove(adapter->vdev); 4418 return -EIO; 4419 } 4420 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4421 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4422 /* variable buffer sizes are not supported, so just read the 4423 * first entry. 4424 */ 4425 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4426 4427 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4428 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4429 4430 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4431 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4432 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4433 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4434 4435 for (i = 0; i < num_tx_pools; i++) 4436 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4437 4438 for (i = 0; i < num_rx_pools; i++) 4439 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4440 4441 adapter->num_active_tx_scrqs = num_tx_pools; 4442 adapter->num_active_rx_scrqs = num_rx_pools; 4443 release_login_rsp_buffer(adapter); 4444 release_login_buffer(adapter); 4445 complete(&adapter->init_done); 4446 4447 return 0; 4448 } 4449 4450 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4451 struct ibmvnic_adapter *adapter) 4452 { 4453 struct device *dev = &adapter->vdev->dev; 4454 long rc; 4455 4456 rc = crq->request_unmap_rsp.rc.code; 4457 if (rc) 4458 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4459 } 4460 4461 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4462 struct ibmvnic_adapter *adapter) 4463 { 4464 struct net_device *netdev = adapter->netdev; 4465 struct device *dev = &adapter->vdev->dev; 4466 long rc; 4467 4468 rc = crq->query_map_rsp.rc.code; 4469 if (rc) { 4470 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4471 return; 4472 } 4473 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4474 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4475 crq->query_map_rsp.free_pages); 4476 } 4477 4478 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4479 struct ibmvnic_adapter *adapter) 4480 { 4481 struct net_device *netdev = adapter->netdev; 4482 struct device *dev = &adapter->vdev->dev; 4483 long rc; 4484 4485 atomic_dec(&adapter->running_cap_crqs); 4486 netdev_dbg(netdev, "Outstanding queries: %d\n", 4487 atomic_read(&adapter->running_cap_crqs)); 4488 rc = crq->query_capability.rc.code; 4489 if (rc) { 4490 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4491 goto out; 4492 } 4493 4494 switch (be16_to_cpu(crq->query_capability.capability)) { 4495 case MIN_TX_QUEUES: 4496 adapter->min_tx_queues = 4497 be64_to_cpu(crq->query_capability.number); 4498 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4499 adapter->min_tx_queues); 4500 break; 4501 case MIN_RX_QUEUES: 4502 adapter->min_rx_queues = 4503 be64_to_cpu(crq->query_capability.number); 4504 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4505 adapter->min_rx_queues); 4506 break; 4507 case MIN_RX_ADD_QUEUES: 4508 adapter->min_rx_add_queues = 4509 be64_to_cpu(crq->query_capability.number); 4510 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4511 adapter->min_rx_add_queues); 4512 break; 4513 case MAX_TX_QUEUES: 4514 adapter->max_tx_queues = 4515 be64_to_cpu(crq->query_capability.number); 4516 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4517 adapter->max_tx_queues); 4518 break; 4519 case MAX_RX_QUEUES: 4520 adapter->max_rx_queues = 4521 be64_to_cpu(crq->query_capability.number); 4522 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4523 adapter->max_rx_queues); 4524 break; 4525 case MAX_RX_ADD_QUEUES: 4526 adapter->max_rx_add_queues = 4527 be64_to_cpu(crq->query_capability.number); 4528 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4529 adapter->max_rx_add_queues); 4530 break; 4531 case MIN_TX_ENTRIES_PER_SUBCRQ: 4532 adapter->min_tx_entries_per_subcrq = 4533 be64_to_cpu(crq->query_capability.number); 4534 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4535 adapter->min_tx_entries_per_subcrq); 4536 break; 4537 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4538 adapter->min_rx_add_entries_per_subcrq = 4539 be64_to_cpu(crq->query_capability.number); 4540 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4541 adapter->min_rx_add_entries_per_subcrq); 4542 break; 4543 case MAX_TX_ENTRIES_PER_SUBCRQ: 4544 adapter->max_tx_entries_per_subcrq = 4545 be64_to_cpu(crq->query_capability.number); 4546 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4547 adapter->max_tx_entries_per_subcrq); 4548 break; 4549 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4550 adapter->max_rx_add_entries_per_subcrq = 4551 be64_to_cpu(crq->query_capability.number); 4552 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4553 adapter->max_rx_add_entries_per_subcrq); 4554 break; 4555 case TCP_IP_OFFLOAD: 4556 adapter->tcp_ip_offload = 4557 be64_to_cpu(crq->query_capability.number); 4558 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4559 adapter->tcp_ip_offload); 4560 break; 4561 case PROMISC_SUPPORTED: 4562 adapter->promisc_supported = 4563 be64_to_cpu(crq->query_capability.number); 4564 netdev_dbg(netdev, "promisc_supported = %lld\n", 4565 adapter->promisc_supported); 4566 break; 4567 case MIN_MTU: 4568 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4569 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4570 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4571 break; 4572 case MAX_MTU: 4573 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4574 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4575 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4576 break; 4577 case MAX_MULTICAST_FILTERS: 4578 adapter->max_multicast_filters = 4579 be64_to_cpu(crq->query_capability.number); 4580 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4581 adapter->max_multicast_filters); 4582 break; 4583 case VLAN_HEADER_INSERTION: 4584 adapter->vlan_header_insertion = 4585 be64_to_cpu(crq->query_capability.number); 4586 if (adapter->vlan_header_insertion) 4587 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4588 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4589 adapter->vlan_header_insertion); 4590 break; 4591 case RX_VLAN_HEADER_INSERTION: 4592 adapter->rx_vlan_header_insertion = 4593 be64_to_cpu(crq->query_capability.number); 4594 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4595 adapter->rx_vlan_header_insertion); 4596 break; 4597 case MAX_TX_SG_ENTRIES: 4598 adapter->max_tx_sg_entries = 4599 be64_to_cpu(crq->query_capability.number); 4600 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4601 adapter->max_tx_sg_entries); 4602 break; 4603 case RX_SG_SUPPORTED: 4604 adapter->rx_sg_supported = 4605 be64_to_cpu(crq->query_capability.number); 4606 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4607 adapter->rx_sg_supported); 4608 break; 4609 case OPT_TX_COMP_SUB_QUEUES: 4610 adapter->opt_tx_comp_sub_queues = 4611 be64_to_cpu(crq->query_capability.number); 4612 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4613 adapter->opt_tx_comp_sub_queues); 4614 break; 4615 case OPT_RX_COMP_QUEUES: 4616 adapter->opt_rx_comp_queues = 4617 be64_to_cpu(crq->query_capability.number); 4618 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4619 adapter->opt_rx_comp_queues); 4620 break; 4621 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4622 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4623 be64_to_cpu(crq->query_capability.number); 4624 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4625 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4626 break; 4627 case OPT_TX_ENTRIES_PER_SUBCRQ: 4628 adapter->opt_tx_entries_per_subcrq = 4629 be64_to_cpu(crq->query_capability.number); 4630 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4631 adapter->opt_tx_entries_per_subcrq); 4632 break; 4633 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4634 adapter->opt_rxba_entries_per_subcrq = 4635 be64_to_cpu(crq->query_capability.number); 4636 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4637 adapter->opt_rxba_entries_per_subcrq); 4638 break; 4639 case TX_RX_DESC_REQ: 4640 adapter->tx_rx_desc_req = crq->query_capability.number; 4641 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4642 adapter->tx_rx_desc_req); 4643 break; 4644 4645 default: 4646 netdev_err(netdev, "Got invalid cap rsp %d\n", 4647 crq->query_capability.capability); 4648 } 4649 4650 out: 4651 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4652 adapter->wait_capability = false; 4653 send_request_cap(adapter, 0); 4654 } 4655 } 4656 4657 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4658 { 4659 union ibmvnic_crq crq; 4660 int rc; 4661 4662 memset(&crq, 0, sizeof(crq)); 4663 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4664 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4665 4666 mutex_lock(&adapter->fw_lock); 4667 adapter->fw_done_rc = 0; 4668 reinit_completion(&adapter->fw_done); 4669 4670 rc = ibmvnic_send_crq(adapter, &crq); 4671 if (rc) { 4672 mutex_unlock(&adapter->fw_lock); 4673 return rc; 4674 } 4675 4676 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4677 if (rc) { 4678 mutex_unlock(&adapter->fw_lock); 4679 return rc; 4680 } 4681 4682 mutex_unlock(&adapter->fw_lock); 4683 return adapter->fw_done_rc ? -EIO : 0; 4684 } 4685 4686 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4687 struct ibmvnic_adapter *adapter) 4688 { 4689 struct net_device *netdev = adapter->netdev; 4690 int rc; 4691 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4692 4693 rc = crq->query_phys_parms_rsp.rc.code; 4694 if (rc) { 4695 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4696 return rc; 4697 } 4698 switch (rspeed) { 4699 case IBMVNIC_10MBPS: 4700 adapter->speed = SPEED_10; 4701 break; 4702 case IBMVNIC_100MBPS: 4703 adapter->speed = SPEED_100; 4704 break; 4705 case IBMVNIC_1GBPS: 4706 adapter->speed = SPEED_1000; 4707 break; 4708 case IBMVNIC_10GBPS: 4709 adapter->speed = SPEED_10000; 4710 break; 4711 case IBMVNIC_25GBPS: 4712 adapter->speed = SPEED_25000; 4713 break; 4714 case IBMVNIC_40GBPS: 4715 adapter->speed = SPEED_40000; 4716 break; 4717 case IBMVNIC_50GBPS: 4718 adapter->speed = SPEED_50000; 4719 break; 4720 case IBMVNIC_100GBPS: 4721 adapter->speed = SPEED_100000; 4722 break; 4723 case IBMVNIC_200GBPS: 4724 adapter->speed = SPEED_200000; 4725 break; 4726 default: 4727 if (netif_carrier_ok(netdev)) 4728 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4729 adapter->speed = SPEED_UNKNOWN; 4730 } 4731 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4732 adapter->duplex = DUPLEX_FULL; 4733 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4734 adapter->duplex = DUPLEX_HALF; 4735 else 4736 adapter->duplex = DUPLEX_UNKNOWN; 4737 4738 return rc; 4739 } 4740 4741 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4742 struct ibmvnic_adapter *adapter) 4743 { 4744 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4745 struct net_device *netdev = adapter->netdev; 4746 struct device *dev = &adapter->vdev->dev; 4747 u64 *u64_crq = (u64 *)crq; 4748 long rc; 4749 4750 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4751 (unsigned long int)cpu_to_be64(u64_crq[0]), 4752 (unsigned long int)cpu_to_be64(u64_crq[1])); 4753 switch (gen_crq->first) { 4754 case IBMVNIC_CRQ_INIT_RSP: 4755 switch (gen_crq->cmd) { 4756 case IBMVNIC_CRQ_INIT: 4757 dev_info(dev, "Partner initialized\n"); 4758 adapter->from_passive_init = true; 4759 if (!completion_done(&adapter->init_done)) { 4760 complete(&adapter->init_done); 4761 adapter->init_done_rc = -EIO; 4762 } 4763 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4764 break; 4765 case IBMVNIC_CRQ_INIT_COMPLETE: 4766 dev_info(dev, "Partner initialization complete\n"); 4767 adapter->crq.active = true; 4768 send_version_xchg(adapter); 4769 break; 4770 default: 4771 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4772 } 4773 return; 4774 case IBMVNIC_CRQ_XPORT_EVENT: 4775 netif_carrier_off(netdev); 4776 adapter->crq.active = false; 4777 /* terminate any thread waiting for a response 4778 * from the device 4779 */ 4780 if (!completion_done(&adapter->fw_done)) { 4781 adapter->fw_done_rc = -EIO; 4782 complete(&adapter->fw_done); 4783 } 4784 if (!completion_done(&adapter->stats_done)) 4785 complete(&adapter->stats_done); 4786 if (test_bit(0, &adapter->resetting)) 4787 adapter->force_reset_recovery = true; 4788 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4789 dev_info(dev, "Migrated, re-enabling adapter\n"); 4790 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4791 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4792 dev_info(dev, "Backing device failover detected\n"); 4793 adapter->failover_pending = true; 4794 } else { 4795 /* The adapter lost the connection */ 4796 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4797 gen_crq->cmd); 4798 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4799 } 4800 return; 4801 case IBMVNIC_CRQ_CMD_RSP: 4802 break; 4803 default: 4804 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4805 gen_crq->first); 4806 return; 4807 } 4808 4809 switch (gen_crq->cmd) { 4810 case VERSION_EXCHANGE_RSP: 4811 rc = crq->version_exchange_rsp.rc.code; 4812 if (rc) { 4813 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4814 break; 4815 } 4816 ibmvnic_version = 4817 be16_to_cpu(crq->version_exchange_rsp.version); 4818 dev_info(dev, "Partner protocol version is %d\n", 4819 ibmvnic_version); 4820 send_query_cap(adapter); 4821 break; 4822 case QUERY_CAPABILITY_RSP: 4823 handle_query_cap_rsp(crq, adapter); 4824 break; 4825 case QUERY_MAP_RSP: 4826 handle_query_map_rsp(crq, adapter); 4827 break; 4828 case REQUEST_MAP_RSP: 4829 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4830 complete(&adapter->fw_done); 4831 break; 4832 case REQUEST_UNMAP_RSP: 4833 handle_request_unmap_rsp(crq, adapter); 4834 break; 4835 case REQUEST_CAPABILITY_RSP: 4836 handle_request_cap_rsp(crq, adapter); 4837 break; 4838 case LOGIN_RSP: 4839 netdev_dbg(netdev, "Got Login Response\n"); 4840 handle_login_rsp(crq, adapter); 4841 break; 4842 case LOGICAL_LINK_STATE_RSP: 4843 netdev_dbg(netdev, 4844 "Got Logical Link State Response, state: %d rc: %d\n", 4845 crq->logical_link_state_rsp.link_state, 4846 crq->logical_link_state_rsp.rc.code); 4847 adapter->logical_link_state = 4848 crq->logical_link_state_rsp.link_state; 4849 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4850 complete(&adapter->init_done); 4851 break; 4852 case LINK_STATE_INDICATION: 4853 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4854 adapter->phys_link_state = 4855 crq->link_state_indication.phys_link_state; 4856 adapter->logical_link_state = 4857 crq->link_state_indication.logical_link_state; 4858 if (adapter->phys_link_state && adapter->logical_link_state) 4859 netif_carrier_on(netdev); 4860 else 4861 netif_carrier_off(netdev); 4862 break; 4863 case CHANGE_MAC_ADDR_RSP: 4864 netdev_dbg(netdev, "Got MAC address change Response\n"); 4865 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4866 break; 4867 case ERROR_INDICATION: 4868 netdev_dbg(netdev, "Got Error Indication\n"); 4869 handle_error_indication(crq, adapter); 4870 break; 4871 case REQUEST_STATISTICS_RSP: 4872 netdev_dbg(netdev, "Got Statistics Response\n"); 4873 complete(&adapter->stats_done); 4874 break; 4875 case QUERY_IP_OFFLOAD_RSP: 4876 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4877 handle_query_ip_offload_rsp(adapter); 4878 break; 4879 case MULTICAST_CTRL_RSP: 4880 netdev_dbg(netdev, "Got multicast control Response\n"); 4881 break; 4882 case CONTROL_IP_OFFLOAD_RSP: 4883 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4884 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4885 sizeof(adapter->ip_offload_ctrl), 4886 DMA_TO_DEVICE); 4887 complete(&adapter->init_done); 4888 break; 4889 case COLLECT_FW_TRACE_RSP: 4890 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4891 complete(&adapter->fw_done); 4892 break; 4893 case GET_VPD_SIZE_RSP: 4894 handle_vpd_size_rsp(crq, adapter); 4895 break; 4896 case GET_VPD_RSP: 4897 handle_vpd_rsp(crq, adapter); 4898 break; 4899 case QUERY_PHYS_PARMS_RSP: 4900 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4901 complete(&adapter->fw_done); 4902 break; 4903 default: 4904 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4905 gen_crq->cmd); 4906 } 4907 } 4908 4909 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4910 { 4911 struct ibmvnic_adapter *adapter = instance; 4912 4913 tasklet_schedule(&adapter->tasklet); 4914 return IRQ_HANDLED; 4915 } 4916 4917 static void ibmvnic_tasklet(struct tasklet_struct *t) 4918 { 4919 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 4920 struct ibmvnic_crq_queue *queue = &adapter->crq; 4921 union ibmvnic_crq *crq; 4922 unsigned long flags; 4923 bool done = false; 4924 4925 spin_lock_irqsave(&queue->lock, flags); 4926 while (!done) { 4927 /* Pull all the valid messages off the CRQ */ 4928 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4929 ibmvnic_handle_crq(crq, adapter); 4930 crq->generic.first = 0; 4931 } 4932 4933 /* remain in tasklet until all 4934 * capabilities responses are received 4935 */ 4936 if (!adapter->wait_capability) 4937 done = true; 4938 } 4939 /* if capabilities CRQ's were sent in this tasklet, the following 4940 * tasklet must wait until all responses are received 4941 */ 4942 if (atomic_read(&adapter->running_cap_crqs) != 0) 4943 adapter->wait_capability = true; 4944 spin_unlock_irqrestore(&queue->lock, flags); 4945 } 4946 4947 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4948 { 4949 struct vio_dev *vdev = adapter->vdev; 4950 int rc; 4951 4952 do { 4953 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4954 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4955 4956 if (rc) 4957 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4958 4959 return rc; 4960 } 4961 4962 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4963 { 4964 struct ibmvnic_crq_queue *crq = &adapter->crq; 4965 struct device *dev = &adapter->vdev->dev; 4966 struct vio_dev *vdev = adapter->vdev; 4967 int rc; 4968 4969 /* Close the CRQ */ 4970 do { 4971 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4972 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4973 4974 /* Clean out the queue */ 4975 if (!crq->msgs) 4976 return -EINVAL; 4977 4978 memset(crq->msgs, 0, PAGE_SIZE); 4979 crq->cur = 0; 4980 crq->active = false; 4981 4982 /* And re-open it again */ 4983 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4984 crq->msg_token, PAGE_SIZE); 4985 4986 if (rc == H_CLOSED) 4987 /* Adapter is good, but other end is not ready */ 4988 dev_warn(dev, "Partner adapter not ready\n"); 4989 else if (rc != 0) 4990 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4991 4992 return rc; 4993 } 4994 4995 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4996 { 4997 struct ibmvnic_crq_queue *crq = &adapter->crq; 4998 struct vio_dev *vdev = adapter->vdev; 4999 long rc; 5000 5001 if (!crq->msgs) 5002 return; 5003 5004 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 5005 free_irq(vdev->irq, adapter); 5006 tasklet_kill(&adapter->tasklet); 5007 do { 5008 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5009 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5010 5011 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 5012 DMA_BIDIRECTIONAL); 5013 free_page((unsigned long)crq->msgs); 5014 crq->msgs = NULL; 5015 crq->active = false; 5016 } 5017 5018 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5019 { 5020 struct ibmvnic_crq_queue *crq = &adapter->crq; 5021 struct device *dev = &adapter->vdev->dev; 5022 struct vio_dev *vdev = adapter->vdev; 5023 int rc, retrc = -ENOMEM; 5024 5025 if (crq->msgs) 5026 return 0; 5027 5028 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5029 /* Should we allocate more than one page? */ 5030 5031 if (!crq->msgs) 5032 return -ENOMEM; 5033 5034 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5035 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5036 DMA_BIDIRECTIONAL); 5037 if (dma_mapping_error(dev, crq->msg_token)) 5038 goto map_failed; 5039 5040 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5041 crq->msg_token, PAGE_SIZE); 5042 5043 if (rc == H_RESOURCE) 5044 /* maybe kexecing and resource is busy. try a reset */ 5045 rc = ibmvnic_reset_crq(adapter); 5046 retrc = rc; 5047 5048 if (rc == H_CLOSED) { 5049 dev_warn(dev, "Partner adapter not ready\n"); 5050 } else if (rc) { 5051 dev_warn(dev, "Error %d opening adapter\n", rc); 5052 goto reg_crq_failed; 5053 } 5054 5055 retrc = 0; 5056 5057 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5058 5059 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5060 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5061 adapter->vdev->unit_address); 5062 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5063 if (rc) { 5064 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5065 vdev->irq, rc); 5066 goto req_irq_failed; 5067 } 5068 5069 rc = vio_enable_interrupts(vdev); 5070 if (rc) { 5071 dev_err(dev, "Error %d enabling interrupts\n", rc); 5072 goto req_irq_failed; 5073 } 5074 5075 crq->cur = 0; 5076 spin_lock_init(&crq->lock); 5077 5078 return retrc; 5079 5080 req_irq_failed: 5081 tasklet_kill(&adapter->tasklet); 5082 do { 5083 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5084 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5085 reg_crq_failed: 5086 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5087 map_failed: 5088 free_page((unsigned long)crq->msgs); 5089 crq->msgs = NULL; 5090 return retrc; 5091 } 5092 5093 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5094 { 5095 struct device *dev = &adapter->vdev->dev; 5096 unsigned long timeout = msecs_to_jiffies(30000); 5097 u64 old_num_rx_queues, old_num_tx_queues; 5098 int rc; 5099 5100 adapter->from_passive_init = false; 5101 5102 if (reset) { 5103 old_num_rx_queues = adapter->req_rx_queues; 5104 old_num_tx_queues = adapter->req_tx_queues; 5105 reinit_completion(&adapter->init_done); 5106 } 5107 5108 adapter->init_done_rc = 0; 5109 rc = ibmvnic_send_crq_init(adapter); 5110 if (rc) { 5111 dev_err(dev, "Send crq init failed with error %d\n", rc); 5112 return rc; 5113 } 5114 5115 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5116 dev_err(dev, "Initialization sequence timed out\n"); 5117 return -1; 5118 } 5119 5120 if (adapter->init_done_rc) { 5121 release_crq_queue(adapter); 5122 return adapter->init_done_rc; 5123 } 5124 5125 if (adapter->from_passive_init) { 5126 adapter->state = VNIC_OPEN; 5127 adapter->from_passive_init = false; 5128 return -1; 5129 } 5130 5131 if (reset && 5132 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5133 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5134 if (adapter->req_rx_queues != old_num_rx_queues || 5135 adapter->req_tx_queues != old_num_tx_queues) { 5136 release_sub_crqs(adapter, 0); 5137 rc = init_sub_crqs(adapter); 5138 } else { 5139 rc = reset_sub_crq_queues(adapter); 5140 } 5141 } else { 5142 rc = init_sub_crqs(adapter); 5143 } 5144 5145 if (rc) { 5146 dev_err(dev, "Initialization of sub crqs failed\n"); 5147 release_crq_queue(adapter); 5148 return rc; 5149 } 5150 5151 rc = init_sub_crq_irqs(adapter); 5152 if (rc) { 5153 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5154 release_crq_queue(adapter); 5155 } 5156 5157 return rc; 5158 } 5159 5160 static struct device_attribute dev_attr_failover; 5161 5162 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5163 { 5164 struct ibmvnic_adapter *adapter; 5165 struct net_device *netdev; 5166 unsigned char *mac_addr_p; 5167 int rc; 5168 5169 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5170 dev->unit_address); 5171 5172 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5173 VETH_MAC_ADDR, NULL); 5174 if (!mac_addr_p) { 5175 dev_err(&dev->dev, 5176 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5177 __FILE__, __LINE__); 5178 return 0; 5179 } 5180 5181 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5182 IBMVNIC_MAX_QUEUES); 5183 if (!netdev) 5184 return -ENOMEM; 5185 5186 adapter = netdev_priv(netdev); 5187 adapter->state = VNIC_PROBING; 5188 dev_set_drvdata(&dev->dev, netdev); 5189 adapter->vdev = dev; 5190 adapter->netdev = netdev; 5191 5192 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5193 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5194 netdev->irq = dev->irq; 5195 netdev->netdev_ops = &ibmvnic_netdev_ops; 5196 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5197 SET_NETDEV_DEV(netdev, &dev->dev); 5198 5199 spin_lock_init(&adapter->stats_lock); 5200 5201 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5202 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5203 __ibmvnic_delayed_reset); 5204 INIT_LIST_HEAD(&adapter->rwi_list); 5205 spin_lock_init(&adapter->rwi_lock); 5206 spin_lock_init(&adapter->state_lock); 5207 mutex_init(&adapter->fw_lock); 5208 init_completion(&adapter->init_done); 5209 init_completion(&adapter->fw_done); 5210 init_completion(&adapter->reset_done); 5211 init_completion(&adapter->stats_done); 5212 clear_bit(0, &adapter->resetting); 5213 5214 do { 5215 rc = init_crq_queue(adapter); 5216 if (rc) { 5217 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5218 rc); 5219 goto ibmvnic_init_fail; 5220 } 5221 5222 rc = ibmvnic_reset_init(adapter, false); 5223 if (rc && rc != EAGAIN) 5224 goto ibmvnic_init_fail; 5225 } while (rc == EAGAIN); 5226 5227 rc = init_stats_buffers(adapter); 5228 if (rc) 5229 goto ibmvnic_init_fail; 5230 5231 rc = init_stats_token(adapter); 5232 if (rc) 5233 goto ibmvnic_stats_fail; 5234 5235 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5236 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5237 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5238 5239 rc = device_create_file(&dev->dev, &dev_attr_failover); 5240 if (rc) 5241 goto ibmvnic_dev_file_err; 5242 5243 netif_carrier_off(netdev); 5244 rc = register_netdev(netdev); 5245 if (rc) { 5246 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5247 goto ibmvnic_register_fail; 5248 } 5249 dev_info(&dev->dev, "ibmvnic registered\n"); 5250 5251 adapter->state = VNIC_PROBED; 5252 5253 adapter->wait_for_reset = false; 5254 5255 return 0; 5256 5257 ibmvnic_register_fail: 5258 device_remove_file(&dev->dev, &dev_attr_failover); 5259 5260 ibmvnic_dev_file_err: 5261 release_stats_token(adapter); 5262 5263 ibmvnic_stats_fail: 5264 release_stats_buffers(adapter); 5265 5266 ibmvnic_init_fail: 5267 release_sub_crqs(adapter, 1); 5268 release_crq_queue(adapter); 5269 mutex_destroy(&adapter->fw_lock); 5270 free_netdev(netdev); 5271 5272 return rc; 5273 } 5274 5275 static int ibmvnic_remove(struct vio_dev *dev) 5276 { 5277 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5278 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5279 unsigned long flags; 5280 5281 spin_lock_irqsave(&adapter->state_lock, flags); 5282 if (test_bit(0, &adapter->resetting)) { 5283 spin_unlock_irqrestore(&adapter->state_lock, flags); 5284 return -EBUSY; 5285 } 5286 5287 adapter->state = VNIC_REMOVING; 5288 spin_unlock_irqrestore(&adapter->state_lock, flags); 5289 5290 flush_work(&adapter->ibmvnic_reset); 5291 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5292 5293 rtnl_lock(); 5294 unregister_netdevice(netdev); 5295 5296 release_resources(adapter); 5297 release_sub_crqs(adapter, 1); 5298 release_crq_queue(adapter); 5299 5300 release_stats_token(adapter); 5301 release_stats_buffers(adapter); 5302 5303 adapter->state = VNIC_REMOVED; 5304 5305 rtnl_unlock(); 5306 mutex_destroy(&adapter->fw_lock); 5307 device_remove_file(&dev->dev, &dev_attr_failover); 5308 free_netdev(netdev); 5309 dev_set_drvdata(&dev->dev, NULL); 5310 5311 return 0; 5312 } 5313 5314 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5315 const char *buf, size_t count) 5316 { 5317 struct net_device *netdev = dev_get_drvdata(dev); 5318 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5319 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5320 __be64 session_token; 5321 long rc; 5322 5323 if (!sysfs_streq(buf, "1")) 5324 return -EINVAL; 5325 5326 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5327 H_GET_SESSION_TOKEN, 0, 0, 0); 5328 if (rc) { 5329 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5330 rc); 5331 return -EINVAL; 5332 } 5333 5334 session_token = (__be64)retbuf[0]; 5335 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5336 be64_to_cpu(session_token)); 5337 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5338 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5339 if (rc) { 5340 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5341 rc); 5342 return -EINVAL; 5343 } 5344 5345 return count; 5346 } 5347 5348 static DEVICE_ATTR_WO(failover); 5349 5350 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5351 { 5352 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5353 struct ibmvnic_adapter *adapter; 5354 struct iommu_table *tbl; 5355 unsigned long ret = 0; 5356 int i; 5357 5358 tbl = get_iommu_table_base(&vdev->dev); 5359 5360 /* netdev inits at probe time along with the structures we need below*/ 5361 if (!netdev) 5362 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5363 5364 adapter = netdev_priv(netdev); 5365 5366 ret += PAGE_SIZE; /* the crq message queue */ 5367 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5368 5369 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5370 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5371 5372 for (i = 0; i < adapter->num_active_rx_pools; i++) 5373 ret += adapter->rx_pool[i].size * 5374 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5375 5376 return ret; 5377 } 5378 5379 static int ibmvnic_resume(struct device *dev) 5380 { 5381 struct net_device *netdev = dev_get_drvdata(dev); 5382 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5383 5384 if (adapter->state != VNIC_OPEN) 5385 return 0; 5386 5387 tasklet_schedule(&adapter->tasklet); 5388 5389 return 0; 5390 } 5391 5392 static const struct vio_device_id ibmvnic_device_table[] = { 5393 {"network", "IBM,vnic"}, 5394 {"", "" } 5395 }; 5396 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5397 5398 static const struct dev_pm_ops ibmvnic_pm_ops = { 5399 .resume = ibmvnic_resume 5400 }; 5401 5402 static struct vio_driver ibmvnic_driver = { 5403 .id_table = ibmvnic_device_table, 5404 .probe = ibmvnic_probe, 5405 .remove = ibmvnic_remove, 5406 .get_desired_dma = ibmvnic_get_desired_dma, 5407 .name = ibmvnic_driver_name, 5408 .pm = &ibmvnic_pm_ops, 5409 }; 5410 5411 /* module functions */ 5412 static int __init ibmvnic_module_init(void) 5413 { 5414 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5415 IBMVNIC_DRIVER_VERSION); 5416 5417 return vio_register_driver(&ibmvnic_driver); 5418 } 5419 5420 static void __exit ibmvnic_module_exit(void) 5421 { 5422 vio_unregister_driver(&ibmvnic_driver); 5423 } 5424 5425 module_init(ibmvnic_module_init); 5426 module_exit(ibmvnic_module_exit); 5427