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_map_query(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_cap_queries(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_cap_queries(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_map_query(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 return rc; 1189 1190 rc = init_resources(adapter); 1191 if (rc) { 1192 netdev_err(netdev, "failed to initialize resources\n"); 1193 release_resources(adapter); 1194 return rc; 1195 } 1196 } 1197 1198 rc = __ibmvnic_open(netdev); 1199 1200 return rc; 1201 } 1202 1203 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1204 { 1205 struct ibmvnic_rx_pool *rx_pool; 1206 struct ibmvnic_rx_buff *rx_buff; 1207 u64 rx_entries; 1208 int rx_scrqs; 1209 int i, j; 1210 1211 if (!adapter->rx_pool) 1212 return; 1213 1214 rx_scrqs = adapter->num_active_rx_pools; 1215 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1216 1217 /* Free any remaining skbs in the rx buffer pools */ 1218 for (i = 0; i < rx_scrqs; i++) { 1219 rx_pool = &adapter->rx_pool[i]; 1220 if (!rx_pool || !rx_pool->rx_buff) 1221 continue; 1222 1223 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1224 for (j = 0; j < rx_entries; j++) { 1225 rx_buff = &rx_pool->rx_buff[j]; 1226 if (rx_buff && rx_buff->skb) { 1227 dev_kfree_skb_any(rx_buff->skb); 1228 rx_buff->skb = NULL; 1229 } 1230 } 1231 } 1232 } 1233 1234 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1235 struct ibmvnic_tx_pool *tx_pool) 1236 { 1237 struct ibmvnic_tx_buff *tx_buff; 1238 u64 tx_entries; 1239 int i; 1240 1241 if (!tx_pool || !tx_pool->tx_buff) 1242 return; 1243 1244 tx_entries = tx_pool->num_buffers; 1245 1246 for (i = 0; i < tx_entries; i++) { 1247 tx_buff = &tx_pool->tx_buff[i]; 1248 if (tx_buff && tx_buff->skb) { 1249 dev_kfree_skb_any(tx_buff->skb); 1250 tx_buff->skb = NULL; 1251 } 1252 } 1253 } 1254 1255 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1256 { 1257 int tx_scrqs; 1258 int i; 1259 1260 if (!adapter->tx_pool || !adapter->tso_pool) 1261 return; 1262 1263 tx_scrqs = adapter->num_active_tx_pools; 1264 1265 /* Free any remaining skbs in the tx buffer pools */ 1266 for (i = 0; i < tx_scrqs; i++) { 1267 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1268 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1269 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1270 } 1271 } 1272 1273 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1274 { 1275 struct net_device *netdev = adapter->netdev; 1276 int i; 1277 1278 if (adapter->tx_scrq) { 1279 for (i = 0; i < adapter->req_tx_queues; i++) 1280 if (adapter->tx_scrq[i]->irq) { 1281 netdev_dbg(netdev, 1282 "Disabling tx_scrq[%d] irq\n", i); 1283 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1284 disable_irq(adapter->tx_scrq[i]->irq); 1285 } 1286 } 1287 1288 if (adapter->rx_scrq) { 1289 for (i = 0; i < adapter->req_rx_queues; i++) { 1290 if (adapter->rx_scrq[i]->irq) { 1291 netdev_dbg(netdev, 1292 "Disabling rx_scrq[%d] irq\n", i); 1293 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1294 disable_irq(adapter->rx_scrq[i]->irq); 1295 } 1296 } 1297 } 1298 } 1299 1300 static void ibmvnic_cleanup(struct net_device *netdev) 1301 { 1302 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1303 1304 /* ensure that transmissions are stopped if called by do_reset */ 1305 if (test_bit(0, &adapter->resetting)) 1306 netif_tx_disable(netdev); 1307 else 1308 netif_tx_stop_all_queues(netdev); 1309 1310 ibmvnic_napi_disable(adapter); 1311 ibmvnic_disable_irqs(adapter); 1312 1313 clean_rx_pools(adapter); 1314 clean_tx_pools(adapter); 1315 } 1316 1317 static int __ibmvnic_close(struct net_device *netdev) 1318 { 1319 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1320 int rc = 0; 1321 1322 adapter->state = VNIC_CLOSING; 1323 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1324 if (rc) 1325 return rc; 1326 adapter->state = VNIC_CLOSED; 1327 return 0; 1328 } 1329 1330 static int ibmvnic_close(struct net_device *netdev) 1331 { 1332 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1333 int rc; 1334 1335 /* If device failover is pending, just set device state and return. 1336 * Device operation will be handled by reset routine. 1337 */ 1338 if (adapter->failover_pending) { 1339 adapter->state = VNIC_CLOSED; 1340 return 0; 1341 } 1342 1343 rc = __ibmvnic_close(netdev); 1344 ibmvnic_cleanup(netdev); 1345 1346 return rc; 1347 } 1348 1349 /** 1350 * build_hdr_data - creates L2/L3/L4 header data buffer 1351 * @hdr_field - bitfield determining needed headers 1352 * @skb - socket buffer 1353 * @hdr_len - array of header lengths 1354 * @tot_len - total length of data 1355 * 1356 * Reads hdr_field to determine which headers are needed by firmware. 1357 * Builds a buffer containing these headers. Saves individual header 1358 * lengths and total buffer length to be used to build descriptors. 1359 */ 1360 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1361 int *hdr_len, u8 *hdr_data) 1362 { 1363 int len = 0; 1364 u8 *hdr; 1365 1366 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1367 hdr_len[0] = sizeof(struct vlan_ethhdr); 1368 else 1369 hdr_len[0] = sizeof(struct ethhdr); 1370 1371 if (skb->protocol == htons(ETH_P_IP)) { 1372 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1373 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1374 hdr_len[2] = tcp_hdrlen(skb); 1375 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1376 hdr_len[2] = sizeof(struct udphdr); 1377 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1378 hdr_len[1] = sizeof(struct ipv6hdr); 1379 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1380 hdr_len[2] = tcp_hdrlen(skb); 1381 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1382 hdr_len[2] = sizeof(struct udphdr); 1383 } else if (skb->protocol == htons(ETH_P_ARP)) { 1384 hdr_len[1] = arp_hdr_len(skb->dev); 1385 hdr_len[2] = 0; 1386 } 1387 1388 memset(hdr_data, 0, 120); 1389 if ((hdr_field >> 6) & 1) { 1390 hdr = skb_mac_header(skb); 1391 memcpy(hdr_data, hdr, hdr_len[0]); 1392 len += hdr_len[0]; 1393 } 1394 1395 if ((hdr_field >> 5) & 1) { 1396 hdr = skb_network_header(skb); 1397 memcpy(hdr_data + len, hdr, hdr_len[1]); 1398 len += hdr_len[1]; 1399 } 1400 1401 if ((hdr_field >> 4) & 1) { 1402 hdr = skb_transport_header(skb); 1403 memcpy(hdr_data + len, hdr, hdr_len[2]); 1404 len += hdr_len[2]; 1405 } 1406 return len; 1407 } 1408 1409 /** 1410 * create_hdr_descs - create header and header extension descriptors 1411 * @hdr_field - bitfield determining needed headers 1412 * @data - buffer containing header data 1413 * @len - length of data buffer 1414 * @hdr_len - array of individual header lengths 1415 * @scrq_arr - descriptor array 1416 * 1417 * Creates header and, if needed, header extension descriptors and 1418 * places them in a descriptor array, scrq_arr 1419 */ 1420 1421 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1422 union sub_crq *scrq_arr) 1423 { 1424 union sub_crq hdr_desc; 1425 int tmp_len = len; 1426 int num_descs = 0; 1427 u8 *data, *cur; 1428 int tmp; 1429 1430 while (tmp_len > 0) { 1431 cur = hdr_data + len - tmp_len; 1432 1433 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1434 if (cur != hdr_data) { 1435 data = hdr_desc.hdr_ext.data; 1436 tmp = tmp_len > 29 ? 29 : tmp_len; 1437 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1438 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1439 hdr_desc.hdr_ext.len = tmp; 1440 } else { 1441 data = hdr_desc.hdr.data; 1442 tmp = tmp_len > 24 ? 24 : tmp_len; 1443 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1444 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1445 hdr_desc.hdr.len = tmp; 1446 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1447 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1448 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1449 hdr_desc.hdr.flag = hdr_field << 1; 1450 } 1451 memcpy(data, cur, tmp); 1452 tmp_len -= tmp; 1453 *scrq_arr = hdr_desc; 1454 scrq_arr++; 1455 num_descs++; 1456 } 1457 1458 return num_descs; 1459 } 1460 1461 /** 1462 * build_hdr_descs_arr - build a header descriptor array 1463 * @skb - socket buffer 1464 * @num_entries - number of descriptors to be sent 1465 * @subcrq - first TX descriptor 1466 * @hdr_field - bit field determining which headers will be sent 1467 * 1468 * This function will build a TX descriptor array with applicable 1469 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1470 */ 1471 1472 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1473 int *num_entries, u8 hdr_field) 1474 { 1475 int hdr_len[3] = {0, 0, 0}; 1476 int tot_len; 1477 u8 *hdr_data = txbuff->hdr_data; 1478 1479 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1480 txbuff->hdr_data); 1481 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1482 txbuff->indir_arr + 1); 1483 } 1484 1485 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1486 struct net_device *netdev) 1487 { 1488 /* For some backing devices, mishandling of small packets 1489 * can result in a loss of connection or TX stall. Device 1490 * architects recommend that no packet should be smaller 1491 * than the minimum MTU value provided to the driver, so 1492 * pad any packets to that length 1493 */ 1494 if (skb->len < netdev->min_mtu) 1495 return skb_put_padto(skb, netdev->min_mtu); 1496 1497 return 0; 1498 } 1499 1500 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1501 { 1502 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1503 int queue_num = skb_get_queue_mapping(skb); 1504 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1505 struct device *dev = &adapter->vdev->dev; 1506 struct ibmvnic_tx_buff *tx_buff = NULL; 1507 struct ibmvnic_sub_crq_queue *tx_scrq; 1508 struct ibmvnic_tx_pool *tx_pool; 1509 unsigned int tx_send_failed = 0; 1510 unsigned int tx_map_failed = 0; 1511 unsigned int tx_dropped = 0; 1512 unsigned int tx_packets = 0; 1513 unsigned int tx_bytes = 0; 1514 dma_addr_t data_dma_addr; 1515 struct netdev_queue *txq; 1516 unsigned long lpar_rc; 1517 union sub_crq tx_crq; 1518 unsigned int offset; 1519 int num_entries = 1; 1520 unsigned char *dst; 1521 int index = 0; 1522 u8 proto = 0; 1523 u64 handle; 1524 netdev_tx_t ret = NETDEV_TX_OK; 1525 1526 if (test_bit(0, &adapter->resetting)) { 1527 if (!netif_subqueue_stopped(netdev, skb)) 1528 netif_stop_subqueue(netdev, queue_num); 1529 dev_kfree_skb_any(skb); 1530 1531 tx_send_failed++; 1532 tx_dropped++; 1533 ret = NETDEV_TX_OK; 1534 goto out; 1535 } 1536 1537 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1538 tx_dropped++; 1539 tx_send_failed++; 1540 ret = NETDEV_TX_OK; 1541 goto out; 1542 } 1543 if (skb_is_gso(skb)) 1544 tx_pool = &adapter->tso_pool[queue_num]; 1545 else 1546 tx_pool = &adapter->tx_pool[queue_num]; 1547 1548 tx_scrq = adapter->tx_scrq[queue_num]; 1549 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1550 handle = tx_scrq->handle; 1551 1552 index = tx_pool->free_map[tx_pool->consumer_index]; 1553 1554 if (index == IBMVNIC_INVALID_MAP) { 1555 dev_kfree_skb_any(skb); 1556 tx_send_failed++; 1557 tx_dropped++; 1558 ret = NETDEV_TX_OK; 1559 goto out; 1560 } 1561 1562 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1563 1564 offset = index * tx_pool->buf_size; 1565 dst = tx_pool->long_term_buff.buff + offset; 1566 memset(dst, 0, tx_pool->buf_size); 1567 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1568 1569 if (skb_shinfo(skb)->nr_frags) { 1570 int cur, i; 1571 1572 /* Copy the head */ 1573 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1574 cur = skb_headlen(skb); 1575 1576 /* Copy the frags */ 1577 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1578 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1579 1580 memcpy(dst + cur, 1581 page_address(skb_frag_page(frag)) + 1582 skb_frag_off(frag), skb_frag_size(frag)); 1583 cur += skb_frag_size(frag); 1584 } 1585 } else { 1586 skb_copy_from_linear_data(skb, dst, skb->len); 1587 } 1588 1589 tx_pool->consumer_index = 1590 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1591 1592 tx_buff = &tx_pool->tx_buff[index]; 1593 tx_buff->skb = skb; 1594 tx_buff->data_dma[0] = data_dma_addr; 1595 tx_buff->data_len[0] = skb->len; 1596 tx_buff->index = index; 1597 tx_buff->pool_index = queue_num; 1598 tx_buff->last_frag = true; 1599 1600 memset(&tx_crq, 0, sizeof(tx_crq)); 1601 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1602 tx_crq.v1.type = IBMVNIC_TX_DESC; 1603 tx_crq.v1.n_crq_elem = 1; 1604 tx_crq.v1.n_sge = 1; 1605 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1606 1607 if (skb_is_gso(skb)) 1608 tx_crq.v1.correlator = 1609 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1610 else 1611 tx_crq.v1.correlator = cpu_to_be32(index); 1612 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1613 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1614 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1615 1616 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1617 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1618 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1619 } 1620 1621 if (skb->protocol == htons(ETH_P_IP)) { 1622 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1623 proto = ip_hdr(skb)->protocol; 1624 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1625 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1626 proto = ipv6_hdr(skb)->nexthdr; 1627 } 1628 1629 if (proto == IPPROTO_TCP) 1630 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1631 else if (proto == IPPROTO_UDP) 1632 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1633 1634 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1635 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1636 hdrs += 2; 1637 } 1638 if (skb_is_gso(skb)) { 1639 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1640 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1641 hdrs += 2; 1642 } 1643 /* determine if l2/3/4 headers are sent to firmware */ 1644 if ((*hdrs >> 7) & 1) { 1645 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1646 tx_crq.v1.n_crq_elem = num_entries; 1647 tx_buff->num_entries = num_entries; 1648 tx_buff->indir_arr[0] = tx_crq; 1649 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1650 sizeof(tx_buff->indir_arr), 1651 DMA_TO_DEVICE); 1652 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1653 dev_kfree_skb_any(skb); 1654 tx_buff->skb = NULL; 1655 if (!firmware_has_feature(FW_FEATURE_CMO)) 1656 dev_err(dev, "tx: unable to map descriptor array\n"); 1657 tx_map_failed++; 1658 tx_dropped++; 1659 ret = NETDEV_TX_OK; 1660 goto tx_err_out; 1661 } 1662 lpar_rc = send_subcrq_indirect(adapter, handle, 1663 (u64)tx_buff->indir_dma, 1664 (u64)num_entries); 1665 dma_unmap_single(dev, tx_buff->indir_dma, 1666 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE); 1667 } else { 1668 tx_buff->num_entries = num_entries; 1669 lpar_rc = send_subcrq(adapter, handle, 1670 &tx_crq); 1671 } 1672 if (lpar_rc != H_SUCCESS) { 1673 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1674 dev_err_ratelimited(dev, "tx: send failed\n"); 1675 dev_kfree_skb_any(skb); 1676 tx_buff->skb = NULL; 1677 1678 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1679 /* Disable TX and report carrier off if queue is closed 1680 * or pending failover. 1681 * Firmware guarantees that a signal will be sent to the 1682 * driver, triggering a reset or some other action. 1683 */ 1684 netif_tx_stop_all_queues(netdev); 1685 netif_carrier_off(netdev); 1686 } 1687 1688 tx_send_failed++; 1689 tx_dropped++; 1690 ret = NETDEV_TX_OK; 1691 goto tx_err_out; 1692 } 1693 1694 if (atomic_add_return(num_entries, &tx_scrq->used) 1695 >= adapter->req_tx_entries_per_subcrq) { 1696 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1697 netif_stop_subqueue(netdev, queue_num); 1698 } 1699 1700 tx_packets++; 1701 tx_bytes += skb->len; 1702 txq->trans_start = jiffies; 1703 ret = NETDEV_TX_OK; 1704 goto out; 1705 1706 tx_err_out: 1707 /* roll back consumer index and map array*/ 1708 if (tx_pool->consumer_index == 0) 1709 tx_pool->consumer_index = 1710 tx_pool->num_buffers - 1; 1711 else 1712 tx_pool->consumer_index--; 1713 tx_pool->free_map[tx_pool->consumer_index] = index; 1714 out: 1715 netdev->stats.tx_dropped += tx_dropped; 1716 netdev->stats.tx_bytes += tx_bytes; 1717 netdev->stats.tx_packets += tx_packets; 1718 adapter->tx_send_failed += tx_send_failed; 1719 adapter->tx_map_failed += tx_map_failed; 1720 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1721 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1722 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1723 1724 return ret; 1725 } 1726 1727 static void ibmvnic_set_multi(struct net_device *netdev) 1728 { 1729 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1730 struct netdev_hw_addr *ha; 1731 union ibmvnic_crq crq; 1732 1733 memset(&crq, 0, sizeof(crq)); 1734 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1735 crq.request_capability.cmd = REQUEST_CAPABILITY; 1736 1737 if (netdev->flags & IFF_PROMISC) { 1738 if (!adapter->promisc_supported) 1739 return; 1740 } else { 1741 if (netdev->flags & IFF_ALLMULTI) { 1742 /* Accept all multicast */ 1743 memset(&crq, 0, sizeof(crq)); 1744 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1745 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1746 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1747 ibmvnic_send_crq(adapter, &crq); 1748 } else if (netdev_mc_empty(netdev)) { 1749 /* Reject all multicast */ 1750 memset(&crq, 0, sizeof(crq)); 1751 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1752 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1753 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1754 ibmvnic_send_crq(adapter, &crq); 1755 } else { 1756 /* Accept one or more multicast(s) */ 1757 netdev_for_each_mc_addr(ha, netdev) { 1758 memset(&crq, 0, sizeof(crq)); 1759 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1760 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1761 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1762 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1763 ha->addr); 1764 ibmvnic_send_crq(adapter, &crq); 1765 } 1766 } 1767 } 1768 } 1769 1770 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1771 { 1772 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1773 union ibmvnic_crq crq; 1774 int rc; 1775 1776 if (!is_valid_ether_addr(dev_addr)) { 1777 rc = -EADDRNOTAVAIL; 1778 goto err; 1779 } 1780 1781 memset(&crq, 0, sizeof(crq)); 1782 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1783 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1784 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1785 1786 mutex_lock(&adapter->fw_lock); 1787 adapter->fw_done_rc = 0; 1788 reinit_completion(&adapter->fw_done); 1789 1790 rc = ibmvnic_send_crq(adapter, &crq); 1791 if (rc) { 1792 rc = -EIO; 1793 mutex_unlock(&adapter->fw_lock); 1794 goto err; 1795 } 1796 1797 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1798 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1799 if (rc || adapter->fw_done_rc) { 1800 rc = -EIO; 1801 mutex_unlock(&adapter->fw_lock); 1802 goto err; 1803 } 1804 mutex_unlock(&adapter->fw_lock); 1805 return 0; 1806 err: 1807 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1808 return rc; 1809 } 1810 1811 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1812 { 1813 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1814 struct sockaddr *addr = p; 1815 int rc; 1816 1817 rc = 0; 1818 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1819 if (adapter->state != VNIC_PROBED) 1820 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1821 1822 return rc; 1823 } 1824 1825 /** 1826 * do_change_param_reset returns zero if we are able to keep processing reset 1827 * events, or non-zero if we hit a fatal error and must halt. 1828 */ 1829 static int do_change_param_reset(struct ibmvnic_adapter *adapter, 1830 struct ibmvnic_rwi *rwi, 1831 u32 reset_state) 1832 { 1833 struct net_device *netdev = adapter->netdev; 1834 int i, rc; 1835 1836 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n", 1837 rwi->reset_reason); 1838 1839 netif_carrier_off(netdev); 1840 adapter->reset_reason = rwi->reset_reason; 1841 1842 ibmvnic_cleanup(netdev); 1843 1844 if (reset_state == VNIC_OPEN) { 1845 rc = __ibmvnic_close(netdev); 1846 if (rc) 1847 return rc; 1848 } 1849 1850 release_resources(adapter); 1851 release_sub_crqs(adapter, 1); 1852 release_crq_queue(adapter); 1853 1854 adapter->state = VNIC_PROBED; 1855 1856 rc = init_crq_queue(adapter); 1857 1858 if (rc) { 1859 netdev_err(adapter->netdev, 1860 "Couldn't initialize crq. rc=%d\n", rc); 1861 return rc; 1862 } 1863 1864 rc = ibmvnic_reset_init(adapter, true); 1865 if (rc) 1866 return IBMVNIC_INIT_FAILED; 1867 1868 /* If the adapter was in PROBE state prior to the reset, 1869 * exit here. 1870 */ 1871 if (reset_state == VNIC_PROBED) 1872 return 0; 1873 1874 rc = ibmvnic_login(netdev); 1875 if (rc) { 1876 adapter->state = reset_state; 1877 return rc; 1878 } 1879 1880 rc = init_resources(adapter); 1881 if (rc) 1882 return rc; 1883 1884 ibmvnic_disable_irqs(adapter); 1885 1886 adapter->state = VNIC_CLOSED; 1887 1888 if (reset_state == VNIC_CLOSED) 1889 return 0; 1890 1891 rc = __ibmvnic_open(netdev); 1892 if (rc) 1893 return IBMVNIC_OPEN_FAILED; 1894 1895 /* refresh device's multicast list */ 1896 ibmvnic_set_multi(netdev); 1897 1898 /* kick napi */ 1899 for (i = 0; i < adapter->req_rx_queues; i++) 1900 napi_schedule(&adapter->napi[i]); 1901 1902 return 0; 1903 } 1904 1905 /** 1906 * do_reset returns zero if we are able to keep processing reset events, or 1907 * non-zero if we hit a fatal error and must halt. 1908 */ 1909 static int do_reset(struct ibmvnic_adapter *adapter, 1910 struct ibmvnic_rwi *rwi, u32 reset_state) 1911 { 1912 u64 old_num_rx_queues, old_num_tx_queues; 1913 u64 old_num_rx_slots, old_num_tx_slots; 1914 struct net_device *netdev = adapter->netdev; 1915 int i, rc; 1916 1917 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1918 rwi->reset_reason); 1919 1920 rtnl_lock(); 1921 1922 netif_carrier_off(netdev); 1923 adapter->reset_reason = rwi->reset_reason; 1924 1925 old_num_rx_queues = adapter->req_rx_queues; 1926 old_num_tx_queues = adapter->req_tx_queues; 1927 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1928 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1929 1930 ibmvnic_cleanup(netdev); 1931 1932 if (reset_state == VNIC_OPEN && 1933 adapter->reset_reason != VNIC_RESET_MOBILITY && 1934 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1935 adapter->state = VNIC_CLOSING; 1936 1937 /* Release the RTNL lock before link state change and 1938 * re-acquire after the link state change to allow 1939 * linkwatch_event to grab the RTNL lock and run during 1940 * a reset. 1941 */ 1942 rtnl_unlock(); 1943 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1944 rtnl_lock(); 1945 if (rc) 1946 goto out; 1947 1948 if (adapter->state != VNIC_CLOSING) { 1949 rc = -1; 1950 goto out; 1951 } 1952 1953 adapter->state = VNIC_CLOSED; 1954 } 1955 1956 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1957 /* remove the closed state so when we call open it appears 1958 * we are coming from the probed state. 1959 */ 1960 adapter->state = VNIC_PROBED; 1961 1962 if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1963 rc = ibmvnic_reenable_crq_queue(adapter); 1964 release_sub_crqs(adapter, 1); 1965 } else { 1966 rc = ibmvnic_reset_crq(adapter); 1967 if (rc == H_CLOSED || rc == H_SUCCESS) { 1968 rc = vio_enable_interrupts(adapter->vdev); 1969 if (rc) 1970 netdev_err(adapter->netdev, 1971 "Reset failed to enable interrupts. rc=%d\n", 1972 rc); 1973 } 1974 } 1975 1976 if (rc) { 1977 netdev_err(adapter->netdev, 1978 "Reset couldn't initialize crq. rc=%d\n", rc); 1979 goto out; 1980 } 1981 1982 rc = ibmvnic_reset_init(adapter, true); 1983 if (rc) { 1984 rc = IBMVNIC_INIT_FAILED; 1985 goto out; 1986 } 1987 1988 /* If the adapter was in PROBE state prior to the reset, 1989 * exit here. 1990 */ 1991 if (reset_state == VNIC_PROBED) { 1992 rc = 0; 1993 goto out; 1994 } 1995 1996 rc = ibmvnic_login(netdev); 1997 if (rc) { 1998 adapter->state = reset_state; 1999 goto out; 2000 } 2001 2002 if (adapter->req_rx_queues != old_num_rx_queues || 2003 adapter->req_tx_queues != old_num_tx_queues || 2004 adapter->req_rx_add_entries_per_subcrq != 2005 old_num_rx_slots || 2006 adapter->req_tx_entries_per_subcrq != 2007 old_num_tx_slots || 2008 !adapter->rx_pool || 2009 !adapter->tso_pool || 2010 !adapter->tx_pool) { 2011 release_rx_pools(adapter); 2012 release_tx_pools(adapter); 2013 release_napi(adapter); 2014 release_vpd_data(adapter); 2015 2016 rc = init_resources(adapter); 2017 if (rc) 2018 goto out; 2019 2020 } else { 2021 rc = reset_tx_pools(adapter); 2022 if (rc) 2023 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2024 rc); 2025 goto out; 2026 2027 rc = reset_rx_pools(adapter); 2028 if (rc) 2029 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2030 rc); 2031 goto out; 2032 } 2033 ibmvnic_disable_irqs(adapter); 2034 } 2035 adapter->state = VNIC_CLOSED; 2036 2037 if (reset_state == VNIC_CLOSED) { 2038 rc = 0; 2039 goto out; 2040 } 2041 2042 rc = __ibmvnic_open(netdev); 2043 if (rc) { 2044 rc = IBMVNIC_OPEN_FAILED; 2045 goto out; 2046 } 2047 2048 /* refresh device's multicast list */ 2049 ibmvnic_set_multi(netdev); 2050 2051 /* kick napi */ 2052 for (i = 0; i < adapter->req_rx_queues; i++) 2053 napi_schedule(&adapter->napi[i]); 2054 2055 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 2056 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2057 2058 rc = 0; 2059 2060 out: 2061 rtnl_unlock(); 2062 2063 return rc; 2064 } 2065 2066 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2067 struct ibmvnic_rwi *rwi, u32 reset_state) 2068 { 2069 struct net_device *netdev = adapter->netdev; 2070 int rc; 2071 2072 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2073 rwi->reset_reason); 2074 2075 netif_carrier_off(netdev); 2076 adapter->reset_reason = rwi->reset_reason; 2077 2078 ibmvnic_cleanup(netdev); 2079 release_resources(adapter); 2080 release_sub_crqs(adapter, 0); 2081 release_crq_queue(adapter); 2082 2083 /* remove the closed state so when we call open it appears 2084 * we are coming from the probed state. 2085 */ 2086 adapter->state = VNIC_PROBED; 2087 2088 reinit_completion(&adapter->init_done); 2089 rc = init_crq_queue(adapter); 2090 if (rc) { 2091 netdev_err(adapter->netdev, 2092 "Couldn't initialize crq. rc=%d\n", rc); 2093 return rc; 2094 } 2095 2096 rc = ibmvnic_reset_init(adapter, false); 2097 if (rc) 2098 return rc; 2099 2100 /* If the adapter was in PROBE state prior to the reset, 2101 * exit here. 2102 */ 2103 if (reset_state == VNIC_PROBED) 2104 return 0; 2105 2106 rc = ibmvnic_login(netdev); 2107 if (rc) { 2108 adapter->state = VNIC_PROBED; 2109 return 0; 2110 } 2111 2112 rc = init_resources(adapter); 2113 if (rc) 2114 return rc; 2115 2116 ibmvnic_disable_irqs(adapter); 2117 adapter->state = VNIC_CLOSED; 2118 2119 if (reset_state == VNIC_CLOSED) 2120 return 0; 2121 2122 rc = __ibmvnic_open(netdev); 2123 if (rc) 2124 return IBMVNIC_OPEN_FAILED; 2125 2126 return 0; 2127 } 2128 2129 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2130 { 2131 struct ibmvnic_rwi *rwi; 2132 unsigned long flags; 2133 2134 spin_lock_irqsave(&adapter->rwi_lock, flags); 2135 2136 if (!list_empty(&adapter->rwi_list)) { 2137 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2138 list); 2139 list_del(&rwi->list); 2140 } else { 2141 rwi = NULL; 2142 } 2143 2144 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2145 return rwi; 2146 } 2147 2148 static void free_all_rwi(struct ibmvnic_adapter *adapter) 2149 { 2150 struct ibmvnic_rwi *rwi; 2151 2152 rwi = get_next_rwi(adapter); 2153 while (rwi) { 2154 kfree(rwi); 2155 rwi = get_next_rwi(adapter); 2156 } 2157 } 2158 2159 static void __ibmvnic_reset(struct work_struct *work) 2160 { 2161 struct ibmvnic_rwi *rwi; 2162 struct ibmvnic_adapter *adapter; 2163 bool saved_state = false; 2164 unsigned long flags; 2165 u32 reset_state; 2166 int rc = 0; 2167 2168 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2169 2170 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2171 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2172 IBMVNIC_RESET_DELAY); 2173 return; 2174 } 2175 2176 rwi = get_next_rwi(adapter); 2177 while (rwi) { 2178 spin_lock_irqsave(&adapter->state_lock, flags); 2179 2180 if (adapter->state == VNIC_REMOVING || 2181 adapter->state == VNIC_REMOVED) { 2182 spin_unlock_irqrestore(&adapter->state_lock, flags); 2183 kfree(rwi); 2184 rc = EBUSY; 2185 break; 2186 } 2187 2188 if (!saved_state) { 2189 reset_state = adapter->state; 2190 adapter->state = VNIC_RESETTING; 2191 saved_state = true; 2192 } 2193 spin_unlock_irqrestore(&adapter->state_lock, flags); 2194 2195 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2196 /* CHANGE_PARAM requestor holds rtnl_lock */ 2197 rc = do_change_param_reset(adapter, rwi, reset_state); 2198 } else if (adapter->force_reset_recovery) { 2199 /* Transport event occurred during previous reset */ 2200 if (adapter->wait_for_reset) { 2201 /* Previous was CHANGE_PARAM; caller locked */ 2202 adapter->force_reset_recovery = false; 2203 rc = do_hard_reset(adapter, rwi, reset_state); 2204 } else { 2205 rtnl_lock(); 2206 adapter->force_reset_recovery = false; 2207 rc = do_hard_reset(adapter, rwi, reset_state); 2208 rtnl_unlock(); 2209 } 2210 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL && 2211 adapter->from_passive_init)) { 2212 rc = do_reset(adapter, rwi, reset_state); 2213 } 2214 kfree(rwi); 2215 if (rc == IBMVNIC_OPEN_FAILED) { 2216 if (list_empty(&adapter->rwi_list)) 2217 adapter->state = VNIC_CLOSED; 2218 else 2219 adapter->state = reset_state; 2220 rc = 0; 2221 } else if (rc && rc != IBMVNIC_INIT_FAILED && 2222 !adapter->force_reset_recovery) 2223 break; 2224 2225 rwi = get_next_rwi(adapter); 2226 2227 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2228 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2229 adapter->force_reset_recovery = true; 2230 } 2231 2232 if (adapter->wait_for_reset) { 2233 adapter->reset_done_rc = rc; 2234 complete(&adapter->reset_done); 2235 } 2236 2237 if (rc) { 2238 netdev_dbg(adapter->netdev, "Reset failed\n"); 2239 free_all_rwi(adapter); 2240 } 2241 2242 clear_bit_unlock(0, &adapter->resetting); 2243 } 2244 2245 static void __ibmvnic_delayed_reset(struct work_struct *work) 2246 { 2247 struct ibmvnic_adapter *adapter; 2248 2249 adapter = container_of(work, struct ibmvnic_adapter, 2250 ibmvnic_delayed_reset.work); 2251 __ibmvnic_reset(&adapter->ibmvnic_reset); 2252 } 2253 2254 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2255 enum ibmvnic_reset_reason reason) 2256 { 2257 struct list_head *entry, *tmp_entry; 2258 struct ibmvnic_rwi *rwi, *tmp; 2259 struct net_device *netdev = adapter->netdev; 2260 unsigned long flags; 2261 int ret; 2262 2263 if (adapter->state == VNIC_REMOVING || 2264 adapter->state == VNIC_REMOVED || 2265 adapter->failover_pending) { 2266 ret = EBUSY; 2267 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2268 goto err; 2269 } 2270 2271 if (adapter->state == VNIC_PROBING) { 2272 netdev_warn(netdev, "Adapter reset during probe\n"); 2273 ret = adapter->init_done_rc = EAGAIN; 2274 goto err; 2275 } 2276 2277 spin_lock_irqsave(&adapter->rwi_lock, flags); 2278 2279 list_for_each(entry, &adapter->rwi_list) { 2280 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2281 if (tmp->reset_reason == reason) { 2282 netdev_dbg(netdev, "Skipping matching reset\n"); 2283 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2284 ret = EBUSY; 2285 goto err; 2286 } 2287 } 2288 2289 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2290 if (!rwi) { 2291 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2292 ibmvnic_close(netdev); 2293 ret = ENOMEM; 2294 goto err; 2295 } 2296 /* if we just received a transport event, 2297 * flush reset queue and process this reset 2298 */ 2299 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2300 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2301 list_del(entry); 2302 } 2303 rwi->reset_reason = reason; 2304 list_add_tail(&rwi->list, &adapter->rwi_list); 2305 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2306 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2307 schedule_work(&adapter->ibmvnic_reset); 2308 2309 return 0; 2310 err: 2311 return -ret; 2312 } 2313 2314 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2315 { 2316 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2317 2318 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2319 } 2320 2321 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2322 struct ibmvnic_rx_buff *rx_buff) 2323 { 2324 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2325 2326 rx_buff->skb = NULL; 2327 2328 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2329 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2330 2331 atomic_dec(&pool->available); 2332 } 2333 2334 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2335 { 2336 struct net_device *netdev = napi->dev; 2337 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2338 int scrq_num = (int)(napi - adapter->napi); 2339 int frames_processed = 0; 2340 2341 restart_poll: 2342 while (frames_processed < budget) { 2343 struct sk_buff *skb; 2344 struct ibmvnic_rx_buff *rx_buff; 2345 union sub_crq *next; 2346 u32 length; 2347 u16 offset; 2348 u8 flags = 0; 2349 2350 if (unlikely(test_bit(0, &adapter->resetting) && 2351 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2352 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2353 napi_complete_done(napi, frames_processed); 2354 return frames_processed; 2355 } 2356 2357 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2358 break; 2359 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2360 rx_buff = 2361 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2362 rx_comp.correlator); 2363 /* do error checking */ 2364 if (next->rx_comp.rc) { 2365 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2366 be16_to_cpu(next->rx_comp.rc)); 2367 /* free the entry */ 2368 next->rx_comp.first = 0; 2369 dev_kfree_skb_any(rx_buff->skb); 2370 remove_buff_from_pool(adapter, rx_buff); 2371 continue; 2372 } else if (!rx_buff->skb) { 2373 /* free the entry */ 2374 next->rx_comp.first = 0; 2375 remove_buff_from_pool(adapter, rx_buff); 2376 continue; 2377 } 2378 2379 length = be32_to_cpu(next->rx_comp.len); 2380 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2381 flags = next->rx_comp.flags; 2382 skb = rx_buff->skb; 2383 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2384 length); 2385 2386 /* VLAN Header has been stripped by the system firmware and 2387 * needs to be inserted by the driver 2388 */ 2389 if (adapter->rx_vlan_header_insertion && 2390 (flags & IBMVNIC_VLAN_STRIPPED)) 2391 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2392 ntohs(next->rx_comp.vlan_tci)); 2393 2394 /* free the entry */ 2395 next->rx_comp.first = 0; 2396 remove_buff_from_pool(adapter, rx_buff); 2397 2398 skb_put(skb, length); 2399 skb->protocol = eth_type_trans(skb, netdev); 2400 skb_record_rx_queue(skb, scrq_num); 2401 2402 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2403 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2404 skb->ip_summed = CHECKSUM_UNNECESSARY; 2405 } 2406 2407 length = skb->len; 2408 napi_gro_receive(napi, skb); /* send it up */ 2409 netdev->stats.rx_packets++; 2410 netdev->stats.rx_bytes += length; 2411 adapter->rx_stats_buffers[scrq_num].packets++; 2412 adapter->rx_stats_buffers[scrq_num].bytes += length; 2413 frames_processed++; 2414 } 2415 2416 if (adapter->state != VNIC_CLOSING) 2417 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2418 2419 if (frames_processed < budget) { 2420 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2421 napi_complete_done(napi, frames_processed); 2422 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2423 napi_reschedule(napi)) { 2424 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2425 goto restart_poll; 2426 } 2427 } 2428 return frames_processed; 2429 } 2430 2431 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2432 { 2433 int rc, ret; 2434 2435 adapter->fallback.mtu = adapter->req_mtu; 2436 adapter->fallback.rx_queues = adapter->req_rx_queues; 2437 adapter->fallback.tx_queues = adapter->req_tx_queues; 2438 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2439 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2440 2441 reinit_completion(&adapter->reset_done); 2442 adapter->wait_for_reset = true; 2443 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2444 2445 if (rc) { 2446 ret = rc; 2447 goto out; 2448 } 2449 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2450 if (rc) { 2451 ret = -ENODEV; 2452 goto out; 2453 } 2454 2455 ret = 0; 2456 if (adapter->reset_done_rc) { 2457 ret = -EIO; 2458 adapter->desired.mtu = adapter->fallback.mtu; 2459 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2460 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2461 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2462 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2463 2464 reinit_completion(&adapter->reset_done); 2465 adapter->wait_for_reset = true; 2466 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2467 if (rc) { 2468 ret = rc; 2469 goto out; 2470 } 2471 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2472 60000); 2473 if (rc) { 2474 ret = -ENODEV; 2475 goto out; 2476 } 2477 } 2478 out: 2479 adapter->wait_for_reset = false; 2480 2481 return ret; 2482 } 2483 2484 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2485 { 2486 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2487 2488 adapter->desired.mtu = new_mtu + ETH_HLEN; 2489 2490 return wait_for_reset(adapter); 2491 } 2492 2493 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2494 struct net_device *dev, 2495 netdev_features_t features) 2496 { 2497 /* Some backing hardware adapters can not 2498 * handle packets with a MSS less than 224 2499 * or with only one segment. 2500 */ 2501 if (skb_is_gso(skb)) { 2502 if (skb_shinfo(skb)->gso_size < 224 || 2503 skb_shinfo(skb)->gso_segs == 1) 2504 features &= ~NETIF_F_GSO_MASK; 2505 } 2506 2507 return features; 2508 } 2509 2510 static const struct net_device_ops ibmvnic_netdev_ops = { 2511 .ndo_open = ibmvnic_open, 2512 .ndo_stop = ibmvnic_close, 2513 .ndo_start_xmit = ibmvnic_xmit, 2514 .ndo_set_rx_mode = ibmvnic_set_multi, 2515 .ndo_set_mac_address = ibmvnic_set_mac, 2516 .ndo_validate_addr = eth_validate_addr, 2517 .ndo_tx_timeout = ibmvnic_tx_timeout, 2518 .ndo_change_mtu = ibmvnic_change_mtu, 2519 .ndo_features_check = ibmvnic_features_check, 2520 }; 2521 2522 /* ethtool functions */ 2523 2524 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2525 struct ethtool_link_ksettings *cmd) 2526 { 2527 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2528 int rc; 2529 2530 rc = send_query_phys_parms(adapter); 2531 if (rc) { 2532 adapter->speed = SPEED_UNKNOWN; 2533 adapter->duplex = DUPLEX_UNKNOWN; 2534 } 2535 cmd->base.speed = adapter->speed; 2536 cmd->base.duplex = adapter->duplex; 2537 cmd->base.port = PORT_FIBRE; 2538 cmd->base.phy_address = 0; 2539 cmd->base.autoneg = AUTONEG_ENABLE; 2540 2541 return 0; 2542 } 2543 2544 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2545 struct ethtool_drvinfo *info) 2546 { 2547 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2548 2549 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2550 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2551 strlcpy(info->fw_version, adapter->fw_version, 2552 sizeof(info->fw_version)); 2553 } 2554 2555 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2556 { 2557 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2558 2559 return adapter->msg_enable; 2560 } 2561 2562 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2563 { 2564 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2565 2566 adapter->msg_enable = data; 2567 } 2568 2569 static u32 ibmvnic_get_link(struct net_device *netdev) 2570 { 2571 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2572 2573 /* Don't need to send a query because we request a logical link up at 2574 * init and then we wait for link state indications 2575 */ 2576 return adapter->logical_link_state; 2577 } 2578 2579 static void ibmvnic_get_ringparam(struct net_device *netdev, 2580 struct ethtool_ringparam *ring) 2581 { 2582 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2583 2584 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2585 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2586 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2587 } else { 2588 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2589 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2590 } 2591 ring->rx_mini_max_pending = 0; 2592 ring->rx_jumbo_max_pending = 0; 2593 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2594 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2595 ring->rx_mini_pending = 0; 2596 ring->rx_jumbo_pending = 0; 2597 } 2598 2599 static int ibmvnic_set_ringparam(struct net_device *netdev, 2600 struct ethtool_ringparam *ring) 2601 { 2602 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2603 int ret; 2604 2605 ret = 0; 2606 adapter->desired.rx_entries = ring->rx_pending; 2607 adapter->desired.tx_entries = ring->tx_pending; 2608 2609 ret = wait_for_reset(adapter); 2610 2611 if (!ret && 2612 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2613 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2614 netdev_info(netdev, 2615 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2616 ring->rx_pending, ring->tx_pending, 2617 adapter->req_rx_add_entries_per_subcrq, 2618 adapter->req_tx_entries_per_subcrq); 2619 return ret; 2620 } 2621 2622 static void ibmvnic_get_channels(struct net_device *netdev, 2623 struct ethtool_channels *channels) 2624 { 2625 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2626 2627 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2628 channels->max_rx = adapter->max_rx_queues; 2629 channels->max_tx = adapter->max_tx_queues; 2630 } else { 2631 channels->max_rx = IBMVNIC_MAX_QUEUES; 2632 channels->max_tx = IBMVNIC_MAX_QUEUES; 2633 } 2634 2635 channels->max_other = 0; 2636 channels->max_combined = 0; 2637 channels->rx_count = adapter->req_rx_queues; 2638 channels->tx_count = adapter->req_tx_queues; 2639 channels->other_count = 0; 2640 channels->combined_count = 0; 2641 } 2642 2643 static int ibmvnic_set_channels(struct net_device *netdev, 2644 struct ethtool_channels *channels) 2645 { 2646 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2647 int ret; 2648 2649 ret = 0; 2650 adapter->desired.rx_queues = channels->rx_count; 2651 adapter->desired.tx_queues = channels->tx_count; 2652 2653 ret = wait_for_reset(adapter); 2654 2655 if (!ret && 2656 (adapter->req_rx_queues != channels->rx_count || 2657 adapter->req_tx_queues != channels->tx_count)) 2658 netdev_info(netdev, 2659 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2660 channels->rx_count, channels->tx_count, 2661 adapter->req_rx_queues, adapter->req_tx_queues); 2662 return ret; 2663 2664 } 2665 2666 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2667 { 2668 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2669 int i; 2670 2671 switch (stringset) { 2672 case ETH_SS_STATS: 2673 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2674 i++, data += ETH_GSTRING_LEN) 2675 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2676 2677 for (i = 0; i < adapter->req_tx_queues; i++) { 2678 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2679 data += ETH_GSTRING_LEN; 2680 2681 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2682 data += ETH_GSTRING_LEN; 2683 2684 snprintf(data, ETH_GSTRING_LEN, 2685 "tx%d_dropped_packets", i); 2686 data += ETH_GSTRING_LEN; 2687 } 2688 2689 for (i = 0; i < adapter->req_rx_queues; i++) { 2690 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2691 data += ETH_GSTRING_LEN; 2692 2693 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2694 data += ETH_GSTRING_LEN; 2695 2696 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2697 data += ETH_GSTRING_LEN; 2698 } 2699 break; 2700 2701 case ETH_SS_PRIV_FLAGS: 2702 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2703 strcpy(data + i * ETH_GSTRING_LEN, 2704 ibmvnic_priv_flags[i]); 2705 break; 2706 default: 2707 return; 2708 } 2709 } 2710 2711 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2712 { 2713 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2714 2715 switch (sset) { 2716 case ETH_SS_STATS: 2717 return ARRAY_SIZE(ibmvnic_stats) + 2718 adapter->req_tx_queues * NUM_TX_STATS + 2719 adapter->req_rx_queues * NUM_RX_STATS; 2720 case ETH_SS_PRIV_FLAGS: 2721 return ARRAY_SIZE(ibmvnic_priv_flags); 2722 default: 2723 return -EOPNOTSUPP; 2724 } 2725 } 2726 2727 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2728 struct ethtool_stats *stats, u64 *data) 2729 { 2730 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2731 union ibmvnic_crq crq; 2732 int i, j; 2733 int rc; 2734 2735 memset(&crq, 0, sizeof(crq)); 2736 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2737 crq.request_statistics.cmd = REQUEST_STATISTICS; 2738 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2739 crq.request_statistics.len = 2740 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2741 2742 /* Wait for data to be written */ 2743 reinit_completion(&adapter->stats_done); 2744 rc = ibmvnic_send_crq(adapter, &crq); 2745 if (rc) 2746 return; 2747 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2748 if (rc) 2749 return; 2750 2751 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2752 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2753 ibmvnic_stats[i].offset)); 2754 2755 for (j = 0; j < adapter->req_tx_queues; j++) { 2756 data[i] = adapter->tx_stats_buffers[j].packets; 2757 i++; 2758 data[i] = adapter->tx_stats_buffers[j].bytes; 2759 i++; 2760 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2761 i++; 2762 } 2763 2764 for (j = 0; j < adapter->req_rx_queues; j++) { 2765 data[i] = adapter->rx_stats_buffers[j].packets; 2766 i++; 2767 data[i] = adapter->rx_stats_buffers[j].bytes; 2768 i++; 2769 data[i] = adapter->rx_stats_buffers[j].interrupts; 2770 i++; 2771 } 2772 } 2773 2774 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2775 { 2776 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2777 2778 return adapter->priv_flags; 2779 } 2780 2781 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2782 { 2783 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2784 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2785 2786 if (which_maxes) 2787 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2788 else 2789 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2790 2791 return 0; 2792 } 2793 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2794 .get_drvinfo = ibmvnic_get_drvinfo, 2795 .get_msglevel = ibmvnic_get_msglevel, 2796 .set_msglevel = ibmvnic_set_msglevel, 2797 .get_link = ibmvnic_get_link, 2798 .get_ringparam = ibmvnic_get_ringparam, 2799 .set_ringparam = ibmvnic_set_ringparam, 2800 .get_channels = ibmvnic_get_channels, 2801 .set_channels = ibmvnic_set_channels, 2802 .get_strings = ibmvnic_get_strings, 2803 .get_sset_count = ibmvnic_get_sset_count, 2804 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2805 .get_link_ksettings = ibmvnic_get_link_ksettings, 2806 .get_priv_flags = ibmvnic_get_priv_flags, 2807 .set_priv_flags = ibmvnic_set_priv_flags, 2808 }; 2809 2810 /* Routines for managing CRQs/sCRQs */ 2811 2812 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2813 struct ibmvnic_sub_crq_queue *scrq) 2814 { 2815 int rc; 2816 2817 if (scrq->irq) { 2818 free_irq(scrq->irq, scrq); 2819 irq_dispose_mapping(scrq->irq); 2820 scrq->irq = 0; 2821 } 2822 2823 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2824 atomic_set(&scrq->used, 0); 2825 scrq->cur = 0; 2826 2827 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2828 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2829 return rc; 2830 } 2831 2832 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2833 { 2834 int i, rc; 2835 2836 for (i = 0; i < adapter->req_tx_queues; i++) { 2837 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2838 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2839 if (rc) 2840 return rc; 2841 } 2842 2843 for (i = 0; i < adapter->req_rx_queues; i++) { 2844 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2845 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2846 if (rc) 2847 return rc; 2848 } 2849 2850 return rc; 2851 } 2852 2853 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2854 struct ibmvnic_sub_crq_queue *scrq, 2855 bool do_h_free) 2856 { 2857 struct device *dev = &adapter->vdev->dev; 2858 long rc; 2859 2860 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2861 2862 if (do_h_free) { 2863 /* Close the sub-crqs */ 2864 do { 2865 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2866 adapter->vdev->unit_address, 2867 scrq->crq_num); 2868 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2869 2870 if (rc) { 2871 netdev_err(adapter->netdev, 2872 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2873 scrq->crq_num, rc); 2874 } 2875 } 2876 2877 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2878 DMA_BIDIRECTIONAL); 2879 free_pages((unsigned long)scrq->msgs, 2); 2880 kfree(scrq); 2881 } 2882 2883 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2884 *adapter) 2885 { 2886 struct device *dev = &adapter->vdev->dev; 2887 struct ibmvnic_sub_crq_queue *scrq; 2888 int rc; 2889 2890 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2891 if (!scrq) 2892 return NULL; 2893 2894 scrq->msgs = 2895 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2896 if (!scrq->msgs) { 2897 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2898 goto zero_page_failed; 2899 } 2900 2901 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2902 DMA_BIDIRECTIONAL); 2903 if (dma_mapping_error(dev, scrq->msg_token)) { 2904 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2905 goto map_failed; 2906 } 2907 2908 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2909 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2910 2911 if (rc == H_RESOURCE) 2912 rc = ibmvnic_reset_crq(adapter); 2913 2914 if (rc == H_CLOSED) { 2915 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2916 } else if (rc) { 2917 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2918 goto reg_failed; 2919 } 2920 2921 scrq->adapter = adapter; 2922 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2923 spin_lock_init(&scrq->lock); 2924 2925 netdev_dbg(adapter->netdev, 2926 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2927 scrq->crq_num, scrq->hw_irq, scrq->irq); 2928 2929 return scrq; 2930 2931 reg_failed: 2932 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2933 DMA_BIDIRECTIONAL); 2934 map_failed: 2935 free_pages((unsigned long)scrq->msgs, 2); 2936 zero_page_failed: 2937 kfree(scrq); 2938 2939 return NULL; 2940 } 2941 2942 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2943 { 2944 int i; 2945 2946 if (adapter->tx_scrq) { 2947 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2948 if (!adapter->tx_scrq[i]) 2949 continue; 2950 2951 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2952 i); 2953 if (adapter->tx_scrq[i]->irq) { 2954 free_irq(adapter->tx_scrq[i]->irq, 2955 adapter->tx_scrq[i]); 2956 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2957 adapter->tx_scrq[i]->irq = 0; 2958 } 2959 2960 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2961 do_h_free); 2962 } 2963 2964 kfree(adapter->tx_scrq); 2965 adapter->tx_scrq = NULL; 2966 adapter->num_active_tx_scrqs = 0; 2967 } 2968 2969 if (adapter->rx_scrq) { 2970 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2971 if (!adapter->rx_scrq[i]) 2972 continue; 2973 2974 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2975 i); 2976 if (adapter->rx_scrq[i]->irq) { 2977 free_irq(adapter->rx_scrq[i]->irq, 2978 adapter->rx_scrq[i]); 2979 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2980 adapter->rx_scrq[i]->irq = 0; 2981 } 2982 2983 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2984 do_h_free); 2985 } 2986 2987 kfree(adapter->rx_scrq); 2988 adapter->rx_scrq = NULL; 2989 adapter->num_active_rx_scrqs = 0; 2990 } 2991 } 2992 2993 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2994 struct ibmvnic_sub_crq_queue *scrq) 2995 { 2996 struct device *dev = &adapter->vdev->dev; 2997 unsigned long rc; 2998 2999 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3000 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3001 if (rc) 3002 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3003 scrq->hw_irq, rc); 3004 return rc; 3005 } 3006 3007 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3008 struct ibmvnic_sub_crq_queue *scrq) 3009 { 3010 struct device *dev = &adapter->vdev->dev; 3011 unsigned long rc; 3012 3013 if (scrq->hw_irq > 0x100000000ULL) { 3014 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3015 return 1; 3016 } 3017 3018 if (test_bit(0, &adapter->resetting) && 3019 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3020 u64 val = (0xff000000) | scrq->hw_irq; 3021 3022 rc = plpar_hcall_norets(H_EOI, val); 3023 /* H_EOI would fail with rc = H_FUNCTION when running 3024 * in XIVE mode which is expected, but not an error. 3025 */ 3026 if (rc && (rc != H_FUNCTION)) 3027 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3028 val, rc); 3029 } 3030 3031 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3032 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3033 if (rc) 3034 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3035 scrq->hw_irq, rc); 3036 return rc; 3037 } 3038 3039 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3040 struct ibmvnic_sub_crq_queue *scrq) 3041 { 3042 struct device *dev = &adapter->vdev->dev; 3043 struct ibmvnic_tx_pool *tx_pool; 3044 struct ibmvnic_tx_buff *txbuff; 3045 union sub_crq *next; 3046 int index; 3047 int i, j; 3048 3049 restart_loop: 3050 while (pending_scrq(adapter, scrq)) { 3051 unsigned int pool = scrq->pool_index; 3052 int num_entries = 0; 3053 3054 next = ibmvnic_next_scrq(adapter, scrq); 3055 for (i = 0; i < next->tx_comp.num_comps; i++) { 3056 if (next->tx_comp.rcs[i]) { 3057 dev_err(dev, "tx error %x\n", 3058 next->tx_comp.rcs[i]); 3059 continue; 3060 } 3061 index = be32_to_cpu(next->tx_comp.correlators[i]); 3062 if (index & IBMVNIC_TSO_POOL_MASK) { 3063 tx_pool = &adapter->tso_pool[pool]; 3064 index &= ~IBMVNIC_TSO_POOL_MASK; 3065 } else { 3066 tx_pool = &adapter->tx_pool[pool]; 3067 } 3068 3069 txbuff = &tx_pool->tx_buff[index]; 3070 3071 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 3072 if (!txbuff->data_dma[j]) 3073 continue; 3074 3075 txbuff->data_dma[j] = 0; 3076 } 3077 3078 if (txbuff->last_frag) { 3079 dev_kfree_skb_any(txbuff->skb); 3080 txbuff->skb = NULL; 3081 } 3082 3083 num_entries += txbuff->num_entries; 3084 3085 tx_pool->free_map[tx_pool->producer_index] = index; 3086 tx_pool->producer_index = 3087 (tx_pool->producer_index + 1) % 3088 tx_pool->num_buffers; 3089 } 3090 /* remove tx_comp scrq*/ 3091 next->tx_comp.first = 0; 3092 3093 if (atomic_sub_return(num_entries, &scrq->used) <= 3094 (adapter->req_tx_entries_per_subcrq / 2) && 3095 __netif_subqueue_stopped(adapter->netdev, 3096 scrq->pool_index)) { 3097 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3098 netdev_dbg(adapter->netdev, "Started queue %d\n", 3099 scrq->pool_index); 3100 } 3101 } 3102 3103 enable_scrq_irq(adapter, scrq); 3104 3105 if (pending_scrq(adapter, scrq)) { 3106 disable_scrq_irq(adapter, scrq); 3107 goto restart_loop; 3108 } 3109 3110 return 0; 3111 } 3112 3113 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3114 { 3115 struct ibmvnic_sub_crq_queue *scrq = instance; 3116 struct ibmvnic_adapter *adapter = scrq->adapter; 3117 3118 disable_scrq_irq(adapter, scrq); 3119 ibmvnic_complete_tx(adapter, scrq); 3120 3121 return IRQ_HANDLED; 3122 } 3123 3124 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3125 { 3126 struct ibmvnic_sub_crq_queue *scrq = instance; 3127 struct ibmvnic_adapter *adapter = scrq->adapter; 3128 3129 /* When booting a kdump kernel we can hit pending interrupts 3130 * prior to completing driver initialization. 3131 */ 3132 if (unlikely(adapter->state != VNIC_OPEN)) 3133 return IRQ_NONE; 3134 3135 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3136 3137 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3138 disable_scrq_irq(adapter, scrq); 3139 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3140 } 3141 3142 return IRQ_HANDLED; 3143 } 3144 3145 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3146 { 3147 struct device *dev = &adapter->vdev->dev; 3148 struct ibmvnic_sub_crq_queue *scrq; 3149 int i = 0, j = 0; 3150 int rc = 0; 3151 3152 for (i = 0; i < adapter->req_tx_queues; i++) { 3153 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3154 i); 3155 scrq = adapter->tx_scrq[i]; 3156 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3157 3158 if (!scrq->irq) { 3159 rc = -EINVAL; 3160 dev_err(dev, "Error mapping irq\n"); 3161 goto req_tx_irq_failed; 3162 } 3163 3164 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3165 adapter->vdev->unit_address, i); 3166 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3167 0, scrq->name, scrq); 3168 3169 if (rc) { 3170 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3171 scrq->irq, rc); 3172 irq_dispose_mapping(scrq->irq); 3173 goto req_tx_irq_failed; 3174 } 3175 } 3176 3177 for (i = 0; i < adapter->req_rx_queues; i++) { 3178 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3179 i); 3180 scrq = adapter->rx_scrq[i]; 3181 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3182 if (!scrq->irq) { 3183 rc = -EINVAL; 3184 dev_err(dev, "Error mapping irq\n"); 3185 goto req_rx_irq_failed; 3186 } 3187 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3188 adapter->vdev->unit_address, i); 3189 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3190 0, scrq->name, scrq); 3191 if (rc) { 3192 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3193 scrq->irq, rc); 3194 irq_dispose_mapping(scrq->irq); 3195 goto req_rx_irq_failed; 3196 } 3197 } 3198 return rc; 3199 3200 req_rx_irq_failed: 3201 for (j = 0; j < i; j++) { 3202 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3203 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3204 } 3205 i = adapter->req_tx_queues; 3206 req_tx_irq_failed: 3207 for (j = 0; j < i; j++) { 3208 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3209 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3210 } 3211 release_sub_crqs(adapter, 1); 3212 return rc; 3213 } 3214 3215 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3216 { 3217 struct device *dev = &adapter->vdev->dev; 3218 struct ibmvnic_sub_crq_queue **allqueues; 3219 int registered_queues = 0; 3220 int total_queues; 3221 int more = 0; 3222 int i; 3223 3224 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3225 3226 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3227 if (!allqueues) 3228 return -1; 3229 3230 for (i = 0; i < total_queues; i++) { 3231 allqueues[i] = init_sub_crq_queue(adapter); 3232 if (!allqueues[i]) { 3233 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3234 break; 3235 } 3236 registered_queues++; 3237 } 3238 3239 /* Make sure we were able to register the minimum number of queues */ 3240 if (registered_queues < 3241 adapter->min_tx_queues + adapter->min_rx_queues) { 3242 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3243 goto tx_failed; 3244 } 3245 3246 /* Distribute the failed allocated queues*/ 3247 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3248 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3249 switch (i % 3) { 3250 case 0: 3251 if (adapter->req_rx_queues > adapter->min_rx_queues) 3252 adapter->req_rx_queues--; 3253 else 3254 more++; 3255 break; 3256 case 1: 3257 if (adapter->req_tx_queues > adapter->min_tx_queues) 3258 adapter->req_tx_queues--; 3259 else 3260 more++; 3261 break; 3262 } 3263 } 3264 3265 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3266 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3267 if (!adapter->tx_scrq) 3268 goto tx_failed; 3269 3270 for (i = 0; i < adapter->req_tx_queues; i++) { 3271 adapter->tx_scrq[i] = allqueues[i]; 3272 adapter->tx_scrq[i]->pool_index = i; 3273 adapter->num_active_tx_scrqs++; 3274 } 3275 3276 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3277 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3278 if (!adapter->rx_scrq) 3279 goto rx_failed; 3280 3281 for (i = 0; i < adapter->req_rx_queues; i++) { 3282 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3283 adapter->rx_scrq[i]->scrq_num = i; 3284 adapter->num_active_rx_scrqs++; 3285 } 3286 3287 kfree(allqueues); 3288 return 0; 3289 3290 rx_failed: 3291 kfree(adapter->tx_scrq); 3292 adapter->tx_scrq = NULL; 3293 tx_failed: 3294 for (i = 0; i < registered_queues; i++) 3295 release_sub_crq_queue(adapter, allqueues[i], 1); 3296 kfree(allqueues); 3297 return -1; 3298 } 3299 3300 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3301 { 3302 struct device *dev = &adapter->vdev->dev; 3303 union ibmvnic_crq crq; 3304 int max_entries; 3305 3306 if (!retry) { 3307 /* Sub-CRQ entries are 32 byte long */ 3308 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3309 3310 if (adapter->min_tx_entries_per_subcrq > entries_page || 3311 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3312 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3313 return; 3314 } 3315 3316 if (adapter->desired.mtu) 3317 adapter->req_mtu = adapter->desired.mtu; 3318 else 3319 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3320 3321 if (!adapter->desired.tx_entries) 3322 adapter->desired.tx_entries = 3323 adapter->max_tx_entries_per_subcrq; 3324 if (!adapter->desired.rx_entries) 3325 adapter->desired.rx_entries = 3326 adapter->max_rx_add_entries_per_subcrq; 3327 3328 max_entries = IBMVNIC_MAX_LTB_SIZE / 3329 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3330 3331 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3332 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3333 adapter->desired.tx_entries = max_entries; 3334 } 3335 3336 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3337 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3338 adapter->desired.rx_entries = max_entries; 3339 } 3340 3341 if (adapter->desired.tx_entries) 3342 adapter->req_tx_entries_per_subcrq = 3343 adapter->desired.tx_entries; 3344 else 3345 adapter->req_tx_entries_per_subcrq = 3346 adapter->max_tx_entries_per_subcrq; 3347 3348 if (adapter->desired.rx_entries) 3349 adapter->req_rx_add_entries_per_subcrq = 3350 adapter->desired.rx_entries; 3351 else 3352 adapter->req_rx_add_entries_per_subcrq = 3353 adapter->max_rx_add_entries_per_subcrq; 3354 3355 if (adapter->desired.tx_queues) 3356 adapter->req_tx_queues = 3357 adapter->desired.tx_queues; 3358 else 3359 adapter->req_tx_queues = 3360 adapter->opt_tx_comp_sub_queues; 3361 3362 if (adapter->desired.rx_queues) 3363 adapter->req_rx_queues = 3364 adapter->desired.rx_queues; 3365 else 3366 adapter->req_rx_queues = 3367 adapter->opt_rx_comp_queues; 3368 3369 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3370 } 3371 3372 memset(&crq, 0, sizeof(crq)); 3373 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3374 crq.request_capability.cmd = REQUEST_CAPABILITY; 3375 3376 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3377 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3378 atomic_inc(&adapter->running_cap_crqs); 3379 ibmvnic_send_crq(adapter, &crq); 3380 3381 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3382 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3383 atomic_inc(&adapter->running_cap_crqs); 3384 ibmvnic_send_crq(adapter, &crq); 3385 3386 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3387 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3388 atomic_inc(&adapter->running_cap_crqs); 3389 ibmvnic_send_crq(adapter, &crq); 3390 3391 crq.request_capability.capability = 3392 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3393 crq.request_capability.number = 3394 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3395 atomic_inc(&adapter->running_cap_crqs); 3396 ibmvnic_send_crq(adapter, &crq); 3397 3398 crq.request_capability.capability = 3399 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3400 crq.request_capability.number = 3401 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3402 atomic_inc(&adapter->running_cap_crqs); 3403 ibmvnic_send_crq(adapter, &crq); 3404 3405 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3406 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3407 atomic_inc(&adapter->running_cap_crqs); 3408 ibmvnic_send_crq(adapter, &crq); 3409 3410 if (adapter->netdev->flags & IFF_PROMISC) { 3411 if (adapter->promisc_supported) { 3412 crq.request_capability.capability = 3413 cpu_to_be16(PROMISC_REQUESTED); 3414 crq.request_capability.number = cpu_to_be64(1); 3415 atomic_inc(&adapter->running_cap_crqs); 3416 ibmvnic_send_crq(adapter, &crq); 3417 } 3418 } else { 3419 crq.request_capability.capability = 3420 cpu_to_be16(PROMISC_REQUESTED); 3421 crq.request_capability.number = cpu_to_be64(0); 3422 atomic_inc(&adapter->running_cap_crqs); 3423 ibmvnic_send_crq(adapter, &crq); 3424 } 3425 } 3426 3427 static int pending_scrq(struct ibmvnic_adapter *adapter, 3428 struct ibmvnic_sub_crq_queue *scrq) 3429 { 3430 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3431 3432 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3433 return 1; 3434 else 3435 return 0; 3436 } 3437 3438 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3439 struct ibmvnic_sub_crq_queue *scrq) 3440 { 3441 union sub_crq *entry; 3442 unsigned long flags; 3443 3444 spin_lock_irqsave(&scrq->lock, flags); 3445 entry = &scrq->msgs[scrq->cur]; 3446 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3447 if (++scrq->cur == scrq->size) 3448 scrq->cur = 0; 3449 } else { 3450 entry = NULL; 3451 } 3452 spin_unlock_irqrestore(&scrq->lock, flags); 3453 3454 return entry; 3455 } 3456 3457 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3458 { 3459 struct ibmvnic_crq_queue *queue = &adapter->crq; 3460 union ibmvnic_crq *crq; 3461 3462 crq = &queue->msgs[queue->cur]; 3463 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3464 if (++queue->cur == queue->size) 3465 queue->cur = 0; 3466 } else { 3467 crq = NULL; 3468 } 3469 3470 return crq; 3471 } 3472 3473 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3474 { 3475 switch (rc) { 3476 case H_PARAMETER: 3477 dev_warn_ratelimited(dev, 3478 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3479 func, rc); 3480 break; 3481 case H_CLOSED: 3482 dev_warn_ratelimited(dev, 3483 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3484 func, rc); 3485 break; 3486 default: 3487 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3488 break; 3489 } 3490 } 3491 3492 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3493 union sub_crq *sub_crq) 3494 { 3495 unsigned int ua = adapter->vdev->unit_address; 3496 struct device *dev = &adapter->vdev->dev; 3497 u64 *u64_crq = (u64 *)sub_crq; 3498 int rc; 3499 3500 netdev_dbg(adapter->netdev, 3501 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3502 (unsigned long int)cpu_to_be64(remote_handle), 3503 (unsigned long int)cpu_to_be64(u64_crq[0]), 3504 (unsigned long int)cpu_to_be64(u64_crq[1]), 3505 (unsigned long int)cpu_to_be64(u64_crq[2]), 3506 (unsigned long int)cpu_to_be64(u64_crq[3])); 3507 3508 /* Make sure the hypervisor sees the complete request */ 3509 mb(); 3510 3511 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3512 cpu_to_be64(remote_handle), 3513 cpu_to_be64(u64_crq[0]), 3514 cpu_to_be64(u64_crq[1]), 3515 cpu_to_be64(u64_crq[2]), 3516 cpu_to_be64(u64_crq[3])); 3517 3518 if (rc) 3519 print_subcrq_error(dev, rc, __func__); 3520 3521 return rc; 3522 } 3523 3524 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3525 u64 remote_handle, u64 ioba, u64 num_entries) 3526 { 3527 unsigned int ua = adapter->vdev->unit_address; 3528 struct device *dev = &adapter->vdev->dev; 3529 int rc; 3530 3531 /* Make sure the hypervisor sees the complete request */ 3532 mb(); 3533 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3534 cpu_to_be64(remote_handle), 3535 ioba, num_entries); 3536 3537 if (rc) 3538 print_subcrq_error(dev, rc, __func__); 3539 3540 return rc; 3541 } 3542 3543 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3544 union ibmvnic_crq *crq) 3545 { 3546 unsigned int ua = adapter->vdev->unit_address; 3547 struct device *dev = &adapter->vdev->dev; 3548 u64 *u64_crq = (u64 *)crq; 3549 int rc; 3550 3551 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3552 (unsigned long int)cpu_to_be64(u64_crq[0]), 3553 (unsigned long int)cpu_to_be64(u64_crq[1])); 3554 3555 if (!adapter->crq.active && 3556 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3557 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3558 return -EINVAL; 3559 } 3560 3561 /* Make sure the hypervisor sees the complete request */ 3562 mb(); 3563 3564 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3565 cpu_to_be64(u64_crq[0]), 3566 cpu_to_be64(u64_crq[1])); 3567 3568 if (rc) { 3569 if (rc == H_CLOSED) { 3570 dev_warn(dev, "CRQ Queue closed\n"); 3571 /* do not reset, report the fail, wait for passive init from server */ 3572 } 3573 3574 dev_warn(dev, "Send error (rc=%d)\n", rc); 3575 } 3576 3577 return rc; 3578 } 3579 3580 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3581 { 3582 struct device *dev = &adapter->vdev->dev; 3583 union ibmvnic_crq crq; 3584 int retries = 100; 3585 int rc; 3586 3587 memset(&crq, 0, sizeof(crq)); 3588 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3589 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3590 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3591 3592 do { 3593 rc = ibmvnic_send_crq(adapter, &crq); 3594 if (rc != H_CLOSED) 3595 break; 3596 retries--; 3597 msleep(50); 3598 3599 } while (retries > 0); 3600 3601 if (rc) { 3602 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3603 return rc; 3604 } 3605 3606 return 0; 3607 } 3608 3609 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3610 { 3611 union ibmvnic_crq crq; 3612 3613 memset(&crq, 0, sizeof(crq)); 3614 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3615 crq.version_exchange.cmd = VERSION_EXCHANGE; 3616 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3617 3618 return ibmvnic_send_crq(adapter, &crq); 3619 } 3620 3621 struct vnic_login_client_data { 3622 u8 type; 3623 __be16 len; 3624 char name[]; 3625 } __packed; 3626 3627 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3628 { 3629 int len; 3630 3631 /* Calculate the amount of buffer space needed for the 3632 * vnic client data in the login buffer. There are four entries, 3633 * OS name, LPAR name, device name, and a null last entry. 3634 */ 3635 len = 4 * sizeof(struct vnic_login_client_data); 3636 len += 6; /* "Linux" plus NULL */ 3637 len += strlen(utsname()->nodename) + 1; 3638 len += strlen(adapter->netdev->name) + 1; 3639 3640 return len; 3641 } 3642 3643 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3644 struct vnic_login_client_data *vlcd) 3645 { 3646 const char *os_name = "Linux"; 3647 int len; 3648 3649 /* Type 1 - LPAR OS */ 3650 vlcd->type = 1; 3651 len = strlen(os_name) + 1; 3652 vlcd->len = cpu_to_be16(len); 3653 strncpy(vlcd->name, os_name, len); 3654 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3655 3656 /* Type 2 - LPAR name */ 3657 vlcd->type = 2; 3658 len = strlen(utsname()->nodename) + 1; 3659 vlcd->len = cpu_to_be16(len); 3660 strncpy(vlcd->name, utsname()->nodename, len); 3661 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3662 3663 /* Type 3 - device name */ 3664 vlcd->type = 3; 3665 len = strlen(adapter->netdev->name) + 1; 3666 vlcd->len = cpu_to_be16(len); 3667 strncpy(vlcd->name, adapter->netdev->name, len); 3668 } 3669 3670 static int send_login(struct ibmvnic_adapter *adapter) 3671 { 3672 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3673 struct ibmvnic_login_buffer *login_buffer; 3674 struct device *dev = &adapter->vdev->dev; 3675 dma_addr_t rsp_buffer_token; 3676 dma_addr_t buffer_token; 3677 size_t rsp_buffer_size; 3678 union ibmvnic_crq crq; 3679 size_t buffer_size; 3680 __be64 *tx_list_p; 3681 __be64 *rx_list_p; 3682 int client_data_len; 3683 struct vnic_login_client_data *vlcd; 3684 int i; 3685 3686 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3687 netdev_err(adapter->netdev, 3688 "RX or TX queues are not allocated, device login failed\n"); 3689 return -1; 3690 } 3691 3692 release_login_rsp_buffer(adapter); 3693 client_data_len = vnic_client_data_len(adapter); 3694 3695 buffer_size = 3696 sizeof(struct ibmvnic_login_buffer) + 3697 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3698 client_data_len; 3699 3700 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3701 if (!login_buffer) 3702 goto buf_alloc_failed; 3703 3704 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3705 DMA_TO_DEVICE); 3706 if (dma_mapping_error(dev, buffer_token)) { 3707 dev_err(dev, "Couldn't map login buffer\n"); 3708 goto buf_map_failed; 3709 } 3710 3711 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3712 sizeof(u64) * adapter->req_tx_queues + 3713 sizeof(u64) * adapter->req_rx_queues + 3714 sizeof(u64) * adapter->req_rx_queues + 3715 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3716 3717 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3718 if (!login_rsp_buffer) 3719 goto buf_rsp_alloc_failed; 3720 3721 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3722 rsp_buffer_size, DMA_FROM_DEVICE); 3723 if (dma_mapping_error(dev, rsp_buffer_token)) { 3724 dev_err(dev, "Couldn't map login rsp buffer\n"); 3725 goto buf_rsp_map_failed; 3726 } 3727 3728 adapter->login_buf = login_buffer; 3729 adapter->login_buf_token = buffer_token; 3730 adapter->login_buf_sz = buffer_size; 3731 adapter->login_rsp_buf = login_rsp_buffer; 3732 adapter->login_rsp_buf_token = rsp_buffer_token; 3733 adapter->login_rsp_buf_sz = rsp_buffer_size; 3734 3735 login_buffer->len = cpu_to_be32(buffer_size); 3736 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3737 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3738 login_buffer->off_txcomp_subcrqs = 3739 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3740 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3741 login_buffer->off_rxcomp_subcrqs = 3742 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3743 sizeof(u64) * adapter->req_tx_queues); 3744 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3745 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3746 3747 tx_list_p = (__be64 *)((char *)login_buffer + 3748 sizeof(struct ibmvnic_login_buffer)); 3749 rx_list_p = (__be64 *)((char *)login_buffer + 3750 sizeof(struct ibmvnic_login_buffer) + 3751 sizeof(u64) * adapter->req_tx_queues); 3752 3753 for (i = 0; i < adapter->req_tx_queues; i++) { 3754 if (adapter->tx_scrq[i]) { 3755 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3756 crq_num); 3757 } 3758 } 3759 3760 for (i = 0; i < adapter->req_rx_queues; i++) { 3761 if (adapter->rx_scrq[i]) { 3762 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3763 crq_num); 3764 } 3765 } 3766 3767 /* Insert vNIC login client data */ 3768 vlcd = (struct vnic_login_client_data *) 3769 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3770 login_buffer->client_data_offset = 3771 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3772 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3773 3774 vnic_add_client_data(adapter, vlcd); 3775 3776 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3777 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3778 netdev_dbg(adapter->netdev, "%016lx\n", 3779 ((unsigned long int *)(adapter->login_buf))[i]); 3780 } 3781 3782 memset(&crq, 0, sizeof(crq)); 3783 crq.login.first = IBMVNIC_CRQ_CMD; 3784 crq.login.cmd = LOGIN; 3785 crq.login.ioba = cpu_to_be32(buffer_token); 3786 crq.login.len = cpu_to_be32(buffer_size); 3787 ibmvnic_send_crq(adapter, &crq); 3788 3789 return 0; 3790 3791 buf_rsp_map_failed: 3792 kfree(login_rsp_buffer); 3793 buf_rsp_alloc_failed: 3794 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3795 buf_map_failed: 3796 kfree(login_buffer); 3797 buf_alloc_failed: 3798 return -1; 3799 } 3800 3801 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3802 u32 len, u8 map_id) 3803 { 3804 union ibmvnic_crq crq; 3805 3806 memset(&crq, 0, sizeof(crq)); 3807 crq.request_map.first = IBMVNIC_CRQ_CMD; 3808 crq.request_map.cmd = REQUEST_MAP; 3809 crq.request_map.map_id = map_id; 3810 crq.request_map.ioba = cpu_to_be32(addr); 3811 crq.request_map.len = cpu_to_be32(len); 3812 return ibmvnic_send_crq(adapter, &crq); 3813 } 3814 3815 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3816 { 3817 union ibmvnic_crq crq; 3818 3819 memset(&crq, 0, sizeof(crq)); 3820 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3821 crq.request_unmap.cmd = REQUEST_UNMAP; 3822 crq.request_unmap.map_id = map_id; 3823 return ibmvnic_send_crq(adapter, &crq); 3824 } 3825 3826 static void send_map_query(struct ibmvnic_adapter *adapter) 3827 { 3828 union ibmvnic_crq crq; 3829 3830 memset(&crq, 0, sizeof(crq)); 3831 crq.query_map.first = IBMVNIC_CRQ_CMD; 3832 crq.query_map.cmd = QUERY_MAP; 3833 ibmvnic_send_crq(adapter, &crq); 3834 } 3835 3836 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3837 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3838 { 3839 union ibmvnic_crq crq; 3840 3841 atomic_set(&adapter->running_cap_crqs, 0); 3842 memset(&crq, 0, sizeof(crq)); 3843 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3844 crq.query_capability.cmd = QUERY_CAPABILITY; 3845 3846 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3847 atomic_inc(&adapter->running_cap_crqs); 3848 ibmvnic_send_crq(adapter, &crq); 3849 3850 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3851 atomic_inc(&adapter->running_cap_crqs); 3852 ibmvnic_send_crq(adapter, &crq); 3853 3854 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3855 atomic_inc(&adapter->running_cap_crqs); 3856 ibmvnic_send_crq(adapter, &crq); 3857 3858 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3859 atomic_inc(&adapter->running_cap_crqs); 3860 ibmvnic_send_crq(adapter, &crq); 3861 3862 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3863 atomic_inc(&adapter->running_cap_crqs); 3864 ibmvnic_send_crq(adapter, &crq); 3865 3866 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3867 atomic_inc(&adapter->running_cap_crqs); 3868 ibmvnic_send_crq(adapter, &crq); 3869 3870 crq.query_capability.capability = 3871 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3872 atomic_inc(&adapter->running_cap_crqs); 3873 ibmvnic_send_crq(adapter, &crq); 3874 3875 crq.query_capability.capability = 3876 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3877 atomic_inc(&adapter->running_cap_crqs); 3878 ibmvnic_send_crq(adapter, &crq); 3879 3880 crq.query_capability.capability = 3881 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3882 atomic_inc(&adapter->running_cap_crqs); 3883 ibmvnic_send_crq(adapter, &crq); 3884 3885 crq.query_capability.capability = 3886 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3887 atomic_inc(&adapter->running_cap_crqs); 3888 ibmvnic_send_crq(adapter, &crq); 3889 3890 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3891 atomic_inc(&adapter->running_cap_crqs); 3892 ibmvnic_send_crq(adapter, &crq); 3893 3894 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3895 atomic_inc(&adapter->running_cap_crqs); 3896 ibmvnic_send_crq(adapter, &crq); 3897 3898 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3899 atomic_inc(&adapter->running_cap_crqs); 3900 ibmvnic_send_crq(adapter, &crq); 3901 3902 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3903 atomic_inc(&adapter->running_cap_crqs); 3904 ibmvnic_send_crq(adapter, &crq); 3905 3906 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3907 atomic_inc(&adapter->running_cap_crqs); 3908 ibmvnic_send_crq(adapter, &crq); 3909 3910 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3911 atomic_inc(&adapter->running_cap_crqs); 3912 ibmvnic_send_crq(adapter, &crq); 3913 3914 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3915 atomic_inc(&adapter->running_cap_crqs); 3916 ibmvnic_send_crq(adapter, &crq); 3917 3918 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3919 atomic_inc(&adapter->running_cap_crqs); 3920 ibmvnic_send_crq(adapter, &crq); 3921 3922 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3923 atomic_inc(&adapter->running_cap_crqs); 3924 ibmvnic_send_crq(adapter, &crq); 3925 3926 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3927 atomic_inc(&adapter->running_cap_crqs); 3928 ibmvnic_send_crq(adapter, &crq); 3929 3930 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3931 atomic_inc(&adapter->running_cap_crqs); 3932 ibmvnic_send_crq(adapter, &crq); 3933 3934 crq.query_capability.capability = 3935 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3936 atomic_inc(&adapter->running_cap_crqs); 3937 ibmvnic_send_crq(adapter, &crq); 3938 3939 crq.query_capability.capability = 3940 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3941 atomic_inc(&adapter->running_cap_crqs); 3942 ibmvnic_send_crq(adapter, &crq); 3943 3944 crq.query_capability.capability = 3945 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3946 atomic_inc(&adapter->running_cap_crqs); 3947 ibmvnic_send_crq(adapter, &crq); 3948 3949 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3950 atomic_inc(&adapter->running_cap_crqs); 3951 ibmvnic_send_crq(adapter, &crq); 3952 } 3953 3954 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3955 struct ibmvnic_adapter *adapter) 3956 { 3957 struct device *dev = &adapter->vdev->dev; 3958 3959 if (crq->get_vpd_size_rsp.rc.code) { 3960 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3961 crq->get_vpd_size_rsp.rc.code); 3962 complete(&adapter->fw_done); 3963 return; 3964 } 3965 3966 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3967 complete(&adapter->fw_done); 3968 } 3969 3970 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3971 struct ibmvnic_adapter *adapter) 3972 { 3973 struct device *dev = &adapter->vdev->dev; 3974 unsigned char *substr = NULL; 3975 u8 fw_level_len = 0; 3976 3977 memset(adapter->fw_version, 0, 32); 3978 3979 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3980 DMA_FROM_DEVICE); 3981 3982 if (crq->get_vpd_rsp.rc.code) { 3983 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3984 crq->get_vpd_rsp.rc.code); 3985 goto complete; 3986 } 3987 3988 /* get the position of the firmware version info 3989 * located after the ASCII 'RM' substring in the buffer 3990 */ 3991 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3992 if (!substr) { 3993 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3994 goto complete; 3995 } 3996 3997 /* get length of firmware level ASCII substring */ 3998 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3999 fw_level_len = *(substr + 2); 4000 } else { 4001 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4002 goto complete; 4003 } 4004 4005 /* copy firmware version string from vpd into adapter */ 4006 if ((substr + 3 + fw_level_len) < 4007 (adapter->vpd->buff + adapter->vpd->len)) { 4008 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4009 } else { 4010 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4011 } 4012 4013 complete: 4014 if (adapter->fw_version[0] == '\0') 4015 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4016 complete(&adapter->fw_done); 4017 } 4018 4019 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4020 { 4021 struct device *dev = &adapter->vdev->dev; 4022 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4023 netdev_features_t old_hw_features = 0; 4024 union ibmvnic_crq crq; 4025 int i; 4026 4027 dma_unmap_single(dev, adapter->ip_offload_tok, 4028 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4029 4030 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4031 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4032 netdev_dbg(adapter->netdev, "%016lx\n", 4033 ((unsigned long int *)(buf))[i]); 4034 4035 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4036 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4037 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4038 buf->tcp_ipv4_chksum); 4039 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4040 buf->tcp_ipv6_chksum); 4041 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4042 buf->udp_ipv4_chksum); 4043 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4044 buf->udp_ipv6_chksum); 4045 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4046 buf->large_tx_ipv4); 4047 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4048 buf->large_tx_ipv6); 4049 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4050 buf->large_rx_ipv4); 4051 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4052 buf->large_rx_ipv6); 4053 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4054 buf->max_ipv4_header_size); 4055 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4056 buf->max_ipv6_header_size); 4057 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4058 buf->max_tcp_header_size); 4059 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4060 buf->max_udp_header_size); 4061 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4062 buf->max_large_tx_size); 4063 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4064 buf->max_large_rx_size); 4065 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4066 buf->ipv6_extension_header); 4067 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4068 buf->tcp_pseudosum_req); 4069 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4070 buf->num_ipv6_ext_headers); 4071 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4072 buf->off_ipv6_ext_headers); 4073 4074 adapter->ip_offload_ctrl_tok = 4075 dma_map_single(dev, &adapter->ip_offload_ctrl, 4076 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 4077 4078 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4079 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4080 return; 4081 } 4082 4083 adapter->ip_offload_ctrl.len = 4084 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4085 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 4086 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 4087 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 4088 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4089 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 4090 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4091 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 4092 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 4093 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 4094 4095 /* large_rx disabled for now, additional features needed */ 4096 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 4097 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 4098 4099 if (adapter->state != VNIC_PROBING) { 4100 old_hw_features = adapter->netdev->hw_features; 4101 adapter->netdev->hw_features = 0; 4102 } 4103 4104 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4105 4106 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4107 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4108 4109 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4110 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4111 4112 if ((adapter->netdev->features & 4113 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4114 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4115 4116 if (buf->large_tx_ipv4) 4117 adapter->netdev->hw_features |= NETIF_F_TSO; 4118 if (buf->large_tx_ipv6) 4119 adapter->netdev->hw_features |= NETIF_F_TSO6; 4120 4121 if (adapter->state == VNIC_PROBING) { 4122 adapter->netdev->features |= adapter->netdev->hw_features; 4123 } else if (old_hw_features != adapter->netdev->hw_features) { 4124 netdev_features_t tmp = 0; 4125 4126 /* disable features no longer supported */ 4127 adapter->netdev->features &= adapter->netdev->hw_features; 4128 /* turn on features now supported if previously enabled */ 4129 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4130 adapter->netdev->hw_features; 4131 adapter->netdev->features |= 4132 tmp & adapter->netdev->wanted_features; 4133 } 4134 4135 memset(&crq, 0, sizeof(crq)); 4136 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4137 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4138 crq.control_ip_offload.len = 4139 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4140 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4141 ibmvnic_send_crq(adapter, &crq); 4142 } 4143 4144 static const char *ibmvnic_fw_err_cause(u16 cause) 4145 { 4146 switch (cause) { 4147 case ADAPTER_PROBLEM: 4148 return "adapter problem"; 4149 case BUS_PROBLEM: 4150 return "bus problem"; 4151 case FW_PROBLEM: 4152 return "firmware problem"; 4153 case DD_PROBLEM: 4154 return "device driver problem"; 4155 case EEH_RECOVERY: 4156 return "EEH recovery"; 4157 case FW_UPDATED: 4158 return "firmware updated"; 4159 case LOW_MEMORY: 4160 return "low Memory"; 4161 default: 4162 return "unknown"; 4163 } 4164 } 4165 4166 static void handle_error_indication(union ibmvnic_crq *crq, 4167 struct ibmvnic_adapter *adapter) 4168 { 4169 struct device *dev = &adapter->vdev->dev; 4170 u16 cause; 4171 4172 cause = be16_to_cpu(crq->error_indication.error_cause); 4173 4174 dev_warn_ratelimited(dev, 4175 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4176 crq->error_indication.flags 4177 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4178 ibmvnic_fw_err_cause(cause)); 4179 4180 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4181 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4182 else 4183 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4184 } 4185 4186 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4187 struct ibmvnic_adapter *adapter) 4188 { 4189 struct net_device *netdev = adapter->netdev; 4190 struct device *dev = &adapter->vdev->dev; 4191 long rc; 4192 4193 rc = crq->change_mac_addr_rsp.rc.code; 4194 if (rc) { 4195 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4196 goto out; 4197 } 4198 ether_addr_copy(netdev->dev_addr, 4199 &crq->change_mac_addr_rsp.mac_addr[0]); 4200 out: 4201 complete(&adapter->fw_done); 4202 return rc; 4203 } 4204 4205 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4206 struct ibmvnic_adapter *adapter) 4207 { 4208 struct device *dev = &adapter->vdev->dev; 4209 u64 *req_value; 4210 char *name; 4211 4212 atomic_dec(&adapter->running_cap_crqs); 4213 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4214 case REQ_TX_QUEUES: 4215 req_value = &adapter->req_tx_queues; 4216 name = "tx"; 4217 break; 4218 case REQ_RX_QUEUES: 4219 req_value = &adapter->req_rx_queues; 4220 name = "rx"; 4221 break; 4222 case REQ_RX_ADD_QUEUES: 4223 req_value = &adapter->req_rx_add_queues; 4224 name = "rx_add"; 4225 break; 4226 case REQ_TX_ENTRIES_PER_SUBCRQ: 4227 req_value = &adapter->req_tx_entries_per_subcrq; 4228 name = "tx_entries_per_subcrq"; 4229 break; 4230 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4231 req_value = &adapter->req_rx_add_entries_per_subcrq; 4232 name = "rx_add_entries_per_subcrq"; 4233 break; 4234 case REQ_MTU: 4235 req_value = &adapter->req_mtu; 4236 name = "mtu"; 4237 break; 4238 case PROMISC_REQUESTED: 4239 req_value = &adapter->promisc; 4240 name = "promisc"; 4241 break; 4242 default: 4243 dev_err(dev, "Got invalid cap request rsp %d\n", 4244 crq->request_capability.capability); 4245 return; 4246 } 4247 4248 switch (crq->request_capability_rsp.rc.code) { 4249 case SUCCESS: 4250 break; 4251 case PARTIALSUCCESS: 4252 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4253 *req_value, 4254 (long int)be64_to_cpu(crq->request_capability_rsp. 4255 number), name); 4256 4257 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4258 REQ_MTU) { 4259 pr_err("mtu of %llu is not supported. Reverting.\n", 4260 *req_value); 4261 *req_value = adapter->fallback.mtu; 4262 } else { 4263 *req_value = 4264 be64_to_cpu(crq->request_capability_rsp.number); 4265 } 4266 4267 ibmvnic_send_req_caps(adapter, 1); 4268 return; 4269 default: 4270 dev_err(dev, "Error %d in request cap rsp\n", 4271 crq->request_capability_rsp.rc.code); 4272 return; 4273 } 4274 4275 /* Done receiving requested capabilities, query IP offload support */ 4276 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4277 union ibmvnic_crq newcrq; 4278 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4279 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4280 &adapter->ip_offload_buf; 4281 4282 adapter->wait_capability = false; 4283 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4284 buf_sz, 4285 DMA_FROM_DEVICE); 4286 4287 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4288 if (!firmware_has_feature(FW_FEATURE_CMO)) 4289 dev_err(dev, "Couldn't map offload buffer\n"); 4290 return; 4291 } 4292 4293 memset(&newcrq, 0, sizeof(newcrq)); 4294 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4295 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4296 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4297 newcrq.query_ip_offload.ioba = 4298 cpu_to_be32(adapter->ip_offload_tok); 4299 4300 ibmvnic_send_crq(adapter, &newcrq); 4301 } 4302 } 4303 4304 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4305 struct ibmvnic_adapter *adapter) 4306 { 4307 struct device *dev = &adapter->vdev->dev; 4308 struct net_device *netdev = adapter->netdev; 4309 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4310 struct ibmvnic_login_buffer *login = adapter->login_buf; 4311 u64 *tx_handle_array; 4312 u64 *rx_handle_array; 4313 int num_tx_pools; 4314 int num_rx_pools; 4315 u64 *size_array; 4316 int i; 4317 4318 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4319 DMA_TO_DEVICE); 4320 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4321 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4322 4323 /* If the number of queues requested can't be allocated by the 4324 * server, the login response will return with code 1. We will need 4325 * to resend the login buffer with fewer queues requested. 4326 */ 4327 if (login_rsp_crq->generic.rc.code) { 4328 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4329 complete(&adapter->init_done); 4330 return 0; 4331 } 4332 4333 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4334 4335 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4336 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4337 netdev_dbg(adapter->netdev, "%016lx\n", 4338 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4339 } 4340 4341 /* Sanity checks */ 4342 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4343 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4344 adapter->req_rx_add_queues != 4345 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4346 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4347 ibmvnic_remove(adapter->vdev); 4348 return -EIO; 4349 } 4350 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4351 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4352 /* variable buffer sizes are not supported, so just read the 4353 * first entry. 4354 */ 4355 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4356 4357 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4358 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4359 4360 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4361 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4362 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4363 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4364 4365 for (i = 0; i < num_tx_pools; i++) 4366 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4367 4368 for (i = 0; i < num_rx_pools; i++) 4369 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4370 4371 adapter->num_active_tx_scrqs = num_tx_pools; 4372 adapter->num_active_rx_scrqs = num_rx_pools; 4373 release_login_rsp_buffer(adapter); 4374 release_login_buffer(adapter); 4375 complete(&adapter->init_done); 4376 4377 return 0; 4378 } 4379 4380 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4381 struct ibmvnic_adapter *adapter) 4382 { 4383 struct device *dev = &adapter->vdev->dev; 4384 long rc; 4385 4386 rc = crq->request_unmap_rsp.rc.code; 4387 if (rc) 4388 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4389 } 4390 4391 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4392 struct ibmvnic_adapter *adapter) 4393 { 4394 struct net_device *netdev = adapter->netdev; 4395 struct device *dev = &adapter->vdev->dev; 4396 long rc; 4397 4398 rc = crq->query_map_rsp.rc.code; 4399 if (rc) { 4400 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4401 return; 4402 } 4403 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4404 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4405 crq->query_map_rsp.free_pages); 4406 } 4407 4408 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4409 struct ibmvnic_adapter *adapter) 4410 { 4411 struct net_device *netdev = adapter->netdev; 4412 struct device *dev = &adapter->vdev->dev; 4413 long rc; 4414 4415 atomic_dec(&adapter->running_cap_crqs); 4416 netdev_dbg(netdev, "Outstanding queries: %d\n", 4417 atomic_read(&adapter->running_cap_crqs)); 4418 rc = crq->query_capability.rc.code; 4419 if (rc) { 4420 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4421 goto out; 4422 } 4423 4424 switch (be16_to_cpu(crq->query_capability.capability)) { 4425 case MIN_TX_QUEUES: 4426 adapter->min_tx_queues = 4427 be64_to_cpu(crq->query_capability.number); 4428 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4429 adapter->min_tx_queues); 4430 break; 4431 case MIN_RX_QUEUES: 4432 adapter->min_rx_queues = 4433 be64_to_cpu(crq->query_capability.number); 4434 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4435 adapter->min_rx_queues); 4436 break; 4437 case MIN_RX_ADD_QUEUES: 4438 adapter->min_rx_add_queues = 4439 be64_to_cpu(crq->query_capability.number); 4440 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4441 adapter->min_rx_add_queues); 4442 break; 4443 case MAX_TX_QUEUES: 4444 adapter->max_tx_queues = 4445 be64_to_cpu(crq->query_capability.number); 4446 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4447 adapter->max_tx_queues); 4448 break; 4449 case MAX_RX_QUEUES: 4450 adapter->max_rx_queues = 4451 be64_to_cpu(crq->query_capability.number); 4452 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4453 adapter->max_rx_queues); 4454 break; 4455 case MAX_RX_ADD_QUEUES: 4456 adapter->max_rx_add_queues = 4457 be64_to_cpu(crq->query_capability.number); 4458 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4459 adapter->max_rx_add_queues); 4460 break; 4461 case MIN_TX_ENTRIES_PER_SUBCRQ: 4462 adapter->min_tx_entries_per_subcrq = 4463 be64_to_cpu(crq->query_capability.number); 4464 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4465 adapter->min_tx_entries_per_subcrq); 4466 break; 4467 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4468 adapter->min_rx_add_entries_per_subcrq = 4469 be64_to_cpu(crq->query_capability.number); 4470 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4471 adapter->min_rx_add_entries_per_subcrq); 4472 break; 4473 case MAX_TX_ENTRIES_PER_SUBCRQ: 4474 adapter->max_tx_entries_per_subcrq = 4475 be64_to_cpu(crq->query_capability.number); 4476 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4477 adapter->max_tx_entries_per_subcrq); 4478 break; 4479 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4480 adapter->max_rx_add_entries_per_subcrq = 4481 be64_to_cpu(crq->query_capability.number); 4482 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4483 adapter->max_rx_add_entries_per_subcrq); 4484 break; 4485 case TCP_IP_OFFLOAD: 4486 adapter->tcp_ip_offload = 4487 be64_to_cpu(crq->query_capability.number); 4488 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4489 adapter->tcp_ip_offload); 4490 break; 4491 case PROMISC_SUPPORTED: 4492 adapter->promisc_supported = 4493 be64_to_cpu(crq->query_capability.number); 4494 netdev_dbg(netdev, "promisc_supported = %lld\n", 4495 adapter->promisc_supported); 4496 break; 4497 case MIN_MTU: 4498 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4499 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4500 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4501 break; 4502 case MAX_MTU: 4503 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4504 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4505 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4506 break; 4507 case MAX_MULTICAST_FILTERS: 4508 adapter->max_multicast_filters = 4509 be64_to_cpu(crq->query_capability.number); 4510 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4511 adapter->max_multicast_filters); 4512 break; 4513 case VLAN_HEADER_INSERTION: 4514 adapter->vlan_header_insertion = 4515 be64_to_cpu(crq->query_capability.number); 4516 if (adapter->vlan_header_insertion) 4517 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4518 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4519 adapter->vlan_header_insertion); 4520 break; 4521 case RX_VLAN_HEADER_INSERTION: 4522 adapter->rx_vlan_header_insertion = 4523 be64_to_cpu(crq->query_capability.number); 4524 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4525 adapter->rx_vlan_header_insertion); 4526 break; 4527 case MAX_TX_SG_ENTRIES: 4528 adapter->max_tx_sg_entries = 4529 be64_to_cpu(crq->query_capability.number); 4530 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4531 adapter->max_tx_sg_entries); 4532 break; 4533 case RX_SG_SUPPORTED: 4534 adapter->rx_sg_supported = 4535 be64_to_cpu(crq->query_capability.number); 4536 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4537 adapter->rx_sg_supported); 4538 break; 4539 case OPT_TX_COMP_SUB_QUEUES: 4540 adapter->opt_tx_comp_sub_queues = 4541 be64_to_cpu(crq->query_capability.number); 4542 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4543 adapter->opt_tx_comp_sub_queues); 4544 break; 4545 case OPT_RX_COMP_QUEUES: 4546 adapter->opt_rx_comp_queues = 4547 be64_to_cpu(crq->query_capability.number); 4548 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4549 adapter->opt_rx_comp_queues); 4550 break; 4551 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4552 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4553 be64_to_cpu(crq->query_capability.number); 4554 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4555 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4556 break; 4557 case OPT_TX_ENTRIES_PER_SUBCRQ: 4558 adapter->opt_tx_entries_per_subcrq = 4559 be64_to_cpu(crq->query_capability.number); 4560 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4561 adapter->opt_tx_entries_per_subcrq); 4562 break; 4563 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4564 adapter->opt_rxba_entries_per_subcrq = 4565 be64_to_cpu(crq->query_capability.number); 4566 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4567 adapter->opt_rxba_entries_per_subcrq); 4568 break; 4569 case TX_RX_DESC_REQ: 4570 adapter->tx_rx_desc_req = crq->query_capability.number; 4571 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4572 adapter->tx_rx_desc_req); 4573 break; 4574 4575 default: 4576 netdev_err(netdev, "Got invalid cap rsp %d\n", 4577 crq->query_capability.capability); 4578 } 4579 4580 out: 4581 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4582 adapter->wait_capability = false; 4583 ibmvnic_send_req_caps(adapter, 0); 4584 } 4585 } 4586 4587 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4588 { 4589 union ibmvnic_crq crq; 4590 int rc; 4591 4592 memset(&crq, 0, sizeof(crq)); 4593 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4594 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4595 4596 mutex_lock(&adapter->fw_lock); 4597 adapter->fw_done_rc = 0; 4598 reinit_completion(&adapter->fw_done); 4599 4600 rc = ibmvnic_send_crq(adapter, &crq); 4601 if (rc) { 4602 mutex_unlock(&adapter->fw_lock); 4603 return rc; 4604 } 4605 4606 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4607 if (rc) { 4608 mutex_unlock(&adapter->fw_lock); 4609 return rc; 4610 } 4611 4612 mutex_unlock(&adapter->fw_lock); 4613 return adapter->fw_done_rc ? -EIO : 0; 4614 } 4615 4616 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4617 struct ibmvnic_adapter *adapter) 4618 { 4619 struct net_device *netdev = adapter->netdev; 4620 int rc; 4621 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4622 4623 rc = crq->query_phys_parms_rsp.rc.code; 4624 if (rc) { 4625 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4626 return rc; 4627 } 4628 switch (rspeed) { 4629 case IBMVNIC_10MBPS: 4630 adapter->speed = SPEED_10; 4631 break; 4632 case IBMVNIC_100MBPS: 4633 adapter->speed = SPEED_100; 4634 break; 4635 case IBMVNIC_1GBPS: 4636 adapter->speed = SPEED_1000; 4637 break; 4638 case IBMVNIC_10GBP: 4639 adapter->speed = SPEED_10000; 4640 break; 4641 case IBMVNIC_25GBPS: 4642 adapter->speed = SPEED_25000; 4643 break; 4644 case IBMVNIC_40GBPS: 4645 adapter->speed = SPEED_40000; 4646 break; 4647 case IBMVNIC_50GBPS: 4648 adapter->speed = SPEED_50000; 4649 break; 4650 case IBMVNIC_100GBPS: 4651 adapter->speed = SPEED_100000; 4652 break; 4653 default: 4654 if (netif_carrier_ok(netdev)) 4655 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4656 adapter->speed = SPEED_UNKNOWN; 4657 } 4658 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4659 adapter->duplex = DUPLEX_FULL; 4660 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4661 adapter->duplex = DUPLEX_HALF; 4662 else 4663 adapter->duplex = DUPLEX_UNKNOWN; 4664 4665 return rc; 4666 } 4667 4668 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4669 struct ibmvnic_adapter *adapter) 4670 { 4671 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4672 struct net_device *netdev = adapter->netdev; 4673 struct device *dev = &adapter->vdev->dev; 4674 u64 *u64_crq = (u64 *)crq; 4675 long rc; 4676 4677 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4678 (unsigned long int)cpu_to_be64(u64_crq[0]), 4679 (unsigned long int)cpu_to_be64(u64_crq[1])); 4680 switch (gen_crq->first) { 4681 case IBMVNIC_CRQ_INIT_RSP: 4682 switch (gen_crq->cmd) { 4683 case IBMVNIC_CRQ_INIT: 4684 dev_info(dev, "Partner initialized\n"); 4685 adapter->from_passive_init = true; 4686 adapter->failover_pending = false; 4687 if (!completion_done(&adapter->init_done)) { 4688 complete(&adapter->init_done); 4689 adapter->init_done_rc = -EIO; 4690 } 4691 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4692 break; 4693 case IBMVNIC_CRQ_INIT_COMPLETE: 4694 dev_info(dev, "Partner initialization complete\n"); 4695 adapter->crq.active = true; 4696 send_version_xchg(adapter); 4697 break; 4698 default: 4699 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4700 } 4701 return; 4702 case IBMVNIC_CRQ_XPORT_EVENT: 4703 netif_carrier_off(netdev); 4704 adapter->crq.active = false; 4705 /* terminate any thread waiting for a response 4706 * from the device 4707 */ 4708 if (!completion_done(&adapter->fw_done)) { 4709 adapter->fw_done_rc = -EIO; 4710 complete(&adapter->fw_done); 4711 } 4712 if (!completion_done(&adapter->stats_done)) 4713 complete(&adapter->stats_done); 4714 if (test_bit(0, &adapter->resetting)) 4715 adapter->force_reset_recovery = true; 4716 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4717 dev_info(dev, "Migrated, re-enabling adapter\n"); 4718 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4719 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4720 dev_info(dev, "Backing device failover detected\n"); 4721 adapter->failover_pending = true; 4722 } else { 4723 /* The adapter lost the connection */ 4724 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4725 gen_crq->cmd); 4726 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4727 } 4728 return; 4729 case IBMVNIC_CRQ_CMD_RSP: 4730 break; 4731 default: 4732 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4733 gen_crq->first); 4734 return; 4735 } 4736 4737 switch (gen_crq->cmd) { 4738 case VERSION_EXCHANGE_RSP: 4739 rc = crq->version_exchange_rsp.rc.code; 4740 if (rc) { 4741 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4742 break; 4743 } 4744 ibmvnic_version = 4745 be16_to_cpu(crq->version_exchange_rsp.version); 4746 dev_info(dev, "Partner protocol version is %d\n", 4747 ibmvnic_version); 4748 send_cap_queries(adapter); 4749 break; 4750 case QUERY_CAPABILITY_RSP: 4751 handle_query_cap_rsp(crq, adapter); 4752 break; 4753 case QUERY_MAP_RSP: 4754 handle_query_map_rsp(crq, adapter); 4755 break; 4756 case REQUEST_MAP_RSP: 4757 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4758 complete(&adapter->fw_done); 4759 break; 4760 case REQUEST_UNMAP_RSP: 4761 handle_request_unmap_rsp(crq, adapter); 4762 break; 4763 case REQUEST_CAPABILITY_RSP: 4764 handle_request_cap_rsp(crq, adapter); 4765 break; 4766 case LOGIN_RSP: 4767 netdev_dbg(netdev, "Got Login Response\n"); 4768 handle_login_rsp(crq, adapter); 4769 break; 4770 case LOGICAL_LINK_STATE_RSP: 4771 netdev_dbg(netdev, 4772 "Got Logical Link State Response, state: %d rc: %d\n", 4773 crq->logical_link_state_rsp.link_state, 4774 crq->logical_link_state_rsp.rc.code); 4775 adapter->logical_link_state = 4776 crq->logical_link_state_rsp.link_state; 4777 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4778 complete(&adapter->init_done); 4779 break; 4780 case LINK_STATE_INDICATION: 4781 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4782 adapter->phys_link_state = 4783 crq->link_state_indication.phys_link_state; 4784 adapter->logical_link_state = 4785 crq->link_state_indication.logical_link_state; 4786 if (adapter->phys_link_state && adapter->logical_link_state) 4787 netif_carrier_on(netdev); 4788 else 4789 netif_carrier_off(netdev); 4790 break; 4791 case CHANGE_MAC_ADDR_RSP: 4792 netdev_dbg(netdev, "Got MAC address change Response\n"); 4793 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4794 break; 4795 case ERROR_INDICATION: 4796 netdev_dbg(netdev, "Got Error Indication\n"); 4797 handle_error_indication(crq, adapter); 4798 break; 4799 case REQUEST_STATISTICS_RSP: 4800 netdev_dbg(netdev, "Got Statistics Response\n"); 4801 complete(&adapter->stats_done); 4802 break; 4803 case QUERY_IP_OFFLOAD_RSP: 4804 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4805 handle_query_ip_offload_rsp(adapter); 4806 break; 4807 case MULTICAST_CTRL_RSP: 4808 netdev_dbg(netdev, "Got multicast control Response\n"); 4809 break; 4810 case CONTROL_IP_OFFLOAD_RSP: 4811 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4812 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4813 sizeof(adapter->ip_offload_ctrl), 4814 DMA_TO_DEVICE); 4815 complete(&adapter->init_done); 4816 break; 4817 case COLLECT_FW_TRACE_RSP: 4818 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4819 complete(&adapter->fw_done); 4820 break; 4821 case GET_VPD_SIZE_RSP: 4822 handle_vpd_size_rsp(crq, adapter); 4823 break; 4824 case GET_VPD_RSP: 4825 handle_vpd_rsp(crq, adapter); 4826 break; 4827 case QUERY_PHYS_PARMS_RSP: 4828 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4829 complete(&adapter->fw_done); 4830 break; 4831 default: 4832 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4833 gen_crq->cmd); 4834 } 4835 } 4836 4837 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4838 { 4839 struct ibmvnic_adapter *adapter = instance; 4840 4841 tasklet_schedule(&adapter->tasklet); 4842 return IRQ_HANDLED; 4843 } 4844 4845 static void ibmvnic_tasklet(void *data) 4846 { 4847 struct ibmvnic_adapter *adapter = data; 4848 struct ibmvnic_crq_queue *queue = &adapter->crq; 4849 union ibmvnic_crq *crq; 4850 unsigned long flags; 4851 bool done = false; 4852 4853 spin_lock_irqsave(&queue->lock, flags); 4854 while (!done) { 4855 /* Pull all the valid messages off the CRQ */ 4856 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4857 ibmvnic_handle_crq(crq, adapter); 4858 crq->generic.first = 0; 4859 } 4860 4861 /* remain in tasklet until all 4862 * capabilities responses are received 4863 */ 4864 if (!adapter->wait_capability) 4865 done = true; 4866 } 4867 /* if capabilities CRQ's were sent in this tasklet, the following 4868 * tasklet must wait until all responses are received 4869 */ 4870 if (atomic_read(&adapter->running_cap_crqs) != 0) 4871 adapter->wait_capability = true; 4872 spin_unlock_irqrestore(&queue->lock, flags); 4873 } 4874 4875 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4876 { 4877 struct vio_dev *vdev = adapter->vdev; 4878 int rc; 4879 4880 do { 4881 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4882 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4883 4884 if (rc) 4885 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4886 4887 return rc; 4888 } 4889 4890 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4891 { 4892 struct ibmvnic_crq_queue *crq = &adapter->crq; 4893 struct device *dev = &adapter->vdev->dev; 4894 struct vio_dev *vdev = adapter->vdev; 4895 int rc; 4896 4897 /* Close the CRQ */ 4898 do { 4899 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4900 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4901 4902 /* Clean out the queue */ 4903 memset(crq->msgs, 0, PAGE_SIZE); 4904 crq->cur = 0; 4905 crq->active = false; 4906 4907 /* And re-open it again */ 4908 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4909 crq->msg_token, PAGE_SIZE); 4910 4911 if (rc == H_CLOSED) 4912 /* Adapter is good, but other end is not ready */ 4913 dev_warn(dev, "Partner adapter not ready\n"); 4914 else if (rc != 0) 4915 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4916 4917 return rc; 4918 } 4919 4920 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4921 { 4922 struct ibmvnic_crq_queue *crq = &adapter->crq; 4923 struct vio_dev *vdev = adapter->vdev; 4924 long rc; 4925 4926 if (!crq->msgs) 4927 return; 4928 4929 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4930 free_irq(vdev->irq, adapter); 4931 tasklet_kill(&adapter->tasklet); 4932 do { 4933 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4934 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4935 4936 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4937 DMA_BIDIRECTIONAL); 4938 free_page((unsigned long)crq->msgs); 4939 crq->msgs = NULL; 4940 crq->active = false; 4941 } 4942 4943 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4944 { 4945 struct ibmvnic_crq_queue *crq = &adapter->crq; 4946 struct device *dev = &adapter->vdev->dev; 4947 struct vio_dev *vdev = adapter->vdev; 4948 int rc, retrc = -ENOMEM; 4949 4950 if (crq->msgs) 4951 return 0; 4952 4953 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4954 /* Should we allocate more than one page? */ 4955 4956 if (!crq->msgs) 4957 return -ENOMEM; 4958 4959 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4960 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4961 DMA_BIDIRECTIONAL); 4962 if (dma_mapping_error(dev, crq->msg_token)) 4963 goto map_failed; 4964 4965 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4966 crq->msg_token, PAGE_SIZE); 4967 4968 if (rc == H_RESOURCE) 4969 /* maybe kexecing and resource is busy. try a reset */ 4970 rc = ibmvnic_reset_crq(adapter); 4971 retrc = rc; 4972 4973 if (rc == H_CLOSED) { 4974 dev_warn(dev, "Partner adapter not ready\n"); 4975 } else if (rc) { 4976 dev_warn(dev, "Error %d opening adapter\n", rc); 4977 goto reg_crq_failed; 4978 } 4979 4980 retrc = 0; 4981 4982 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4983 (unsigned long)adapter); 4984 4985 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4986 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 4987 adapter->vdev->unit_address); 4988 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 4989 if (rc) { 4990 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4991 vdev->irq, rc); 4992 goto req_irq_failed; 4993 } 4994 4995 rc = vio_enable_interrupts(vdev); 4996 if (rc) { 4997 dev_err(dev, "Error %d enabling interrupts\n", rc); 4998 goto req_irq_failed; 4999 } 5000 5001 crq->cur = 0; 5002 spin_lock_init(&crq->lock); 5003 5004 return retrc; 5005 5006 req_irq_failed: 5007 tasklet_kill(&adapter->tasklet); 5008 do { 5009 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5010 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5011 reg_crq_failed: 5012 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5013 map_failed: 5014 free_page((unsigned long)crq->msgs); 5015 crq->msgs = NULL; 5016 return retrc; 5017 } 5018 5019 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5020 { 5021 struct device *dev = &adapter->vdev->dev; 5022 unsigned long timeout = msecs_to_jiffies(30000); 5023 u64 old_num_rx_queues, old_num_tx_queues; 5024 int rc; 5025 5026 adapter->from_passive_init = false; 5027 5028 if (reset) { 5029 old_num_rx_queues = adapter->req_rx_queues; 5030 old_num_tx_queues = adapter->req_tx_queues; 5031 reinit_completion(&adapter->init_done); 5032 } 5033 5034 adapter->init_done_rc = 0; 5035 rc = ibmvnic_send_crq_init(adapter); 5036 if (rc) { 5037 dev_err(dev, "Send crq init failed with error %d\n", rc); 5038 return rc; 5039 } 5040 5041 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5042 dev_err(dev, "Initialization sequence timed out\n"); 5043 return -1; 5044 } 5045 5046 if (adapter->init_done_rc) { 5047 release_crq_queue(adapter); 5048 return adapter->init_done_rc; 5049 } 5050 5051 if (reset && 5052 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5053 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5054 if (adapter->req_rx_queues != old_num_rx_queues || 5055 adapter->req_tx_queues != old_num_tx_queues) { 5056 release_sub_crqs(adapter, 0); 5057 rc = init_sub_crqs(adapter); 5058 } else { 5059 rc = reset_sub_crq_queues(adapter); 5060 } 5061 } else { 5062 rc = init_sub_crqs(adapter); 5063 } 5064 5065 if (rc) { 5066 dev_err(dev, "Initialization of sub crqs failed\n"); 5067 release_crq_queue(adapter); 5068 return rc; 5069 } 5070 5071 rc = init_sub_crq_irqs(adapter); 5072 if (rc) { 5073 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5074 release_crq_queue(adapter); 5075 } 5076 5077 return rc; 5078 } 5079 5080 static struct device_attribute dev_attr_failover; 5081 5082 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5083 { 5084 struct ibmvnic_adapter *adapter; 5085 struct net_device *netdev; 5086 unsigned char *mac_addr_p; 5087 int rc; 5088 5089 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5090 dev->unit_address); 5091 5092 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5093 VETH_MAC_ADDR, NULL); 5094 if (!mac_addr_p) { 5095 dev_err(&dev->dev, 5096 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5097 __FILE__, __LINE__); 5098 return 0; 5099 } 5100 5101 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5102 IBMVNIC_MAX_QUEUES); 5103 if (!netdev) 5104 return -ENOMEM; 5105 5106 adapter = netdev_priv(netdev); 5107 adapter->state = VNIC_PROBING; 5108 dev_set_drvdata(&dev->dev, netdev); 5109 adapter->vdev = dev; 5110 adapter->netdev = netdev; 5111 5112 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5113 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5114 netdev->irq = dev->irq; 5115 netdev->netdev_ops = &ibmvnic_netdev_ops; 5116 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5117 SET_NETDEV_DEV(netdev, &dev->dev); 5118 5119 spin_lock_init(&adapter->stats_lock); 5120 5121 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5122 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5123 __ibmvnic_delayed_reset); 5124 INIT_LIST_HEAD(&adapter->rwi_list); 5125 spin_lock_init(&adapter->rwi_lock); 5126 spin_lock_init(&adapter->state_lock); 5127 mutex_init(&adapter->fw_lock); 5128 init_completion(&adapter->init_done); 5129 init_completion(&adapter->fw_done); 5130 init_completion(&adapter->reset_done); 5131 init_completion(&adapter->stats_done); 5132 clear_bit(0, &adapter->resetting); 5133 5134 do { 5135 rc = init_crq_queue(adapter); 5136 if (rc) { 5137 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5138 rc); 5139 goto ibmvnic_init_fail; 5140 } 5141 5142 rc = ibmvnic_reset_init(adapter, false); 5143 if (rc && rc != EAGAIN) 5144 goto ibmvnic_init_fail; 5145 } while (rc == EAGAIN); 5146 5147 rc = init_stats_buffers(adapter); 5148 if (rc) 5149 goto ibmvnic_init_fail; 5150 5151 rc = init_stats_token(adapter); 5152 if (rc) 5153 goto ibmvnic_stats_fail; 5154 5155 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5156 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5157 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5158 5159 rc = device_create_file(&dev->dev, &dev_attr_failover); 5160 if (rc) 5161 goto ibmvnic_dev_file_err; 5162 5163 netif_carrier_off(netdev); 5164 rc = register_netdev(netdev); 5165 if (rc) { 5166 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5167 goto ibmvnic_register_fail; 5168 } 5169 dev_info(&dev->dev, "ibmvnic registered\n"); 5170 5171 adapter->state = VNIC_PROBED; 5172 5173 adapter->wait_for_reset = false; 5174 5175 return 0; 5176 5177 ibmvnic_register_fail: 5178 device_remove_file(&dev->dev, &dev_attr_failover); 5179 5180 ibmvnic_dev_file_err: 5181 release_stats_token(adapter); 5182 5183 ibmvnic_stats_fail: 5184 release_stats_buffers(adapter); 5185 5186 ibmvnic_init_fail: 5187 release_sub_crqs(adapter, 1); 5188 release_crq_queue(adapter); 5189 mutex_destroy(&adapter->fw_lock); 5190 free_netdev(netdev); 5191 5192 return rc; 5193 } 5194 5195 static int ibmvnic_remove(struct vio_dev *dev) 5196 { 5197 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5198 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5199 unsigned long flags; 5200 5201 spin_lock_irqsave(&adapter->state_lock, flags); 5202 if (adapter->state == VNIC_RESETTING) { 5203 spin_unlock_irqrestore(&adapter->state_lock, flags); 5204 return -EBUSY; 5205 } 5206 5207 adapter->state = VNIC_REMOVING; 5208 spin_unlock_irqrestore(&adapter->state_lock, flags); 5209 5210 flush_work(&adapter->ibmvnic_reset); 5211 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5212 5213 rtnl_lock(); 5214 unregister_netdevice(netdev); 5215 5216 release_resources(adapter); 5217 release_sub_crqs(adapter, 1); 5218 release_crq_queue(adapter); 5219 5220 release_stats_token(adapter); 5221 release_stats_buffers(adapter); 5222 5223 adapter->state = VNIC_REMOVED; 5224 5225 rtnl_unlock(); 5226 mutex_destroy(&adapter->fw_lock); 5227 device_remove_file(&dev->dev, &dev_attr_failover); 5228 free_netdev(netdev); 5229 dev_set_drvdata(&dev->dev, NULL); 5230 5231 return 0; 5232 } 5233 5234 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5235 const char *buf, size_t count) 5236 { 5237 struct net_device *netdev = dev_get_drvdata(dev); 5238 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5239 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5240 __be64 session_token; 5241 long rc; 5242 5243 if (!sysfs_streq(buf, "1")) 5244 return -EINVAL; 5245 5246 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5247 H_GET_SESSION_TOKEN, 0, 0, 0); 5248 if (rc) { 5249 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5250 rc); 5251 return -EINVAL; 5252 } 5253 5254 session_token = (__be64)retbuf[0]; 5255 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5256 be64_to_cpu(session_token)); 5257 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5258 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5259 if (rc) { 5260 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5261 rc); 5262 return -EINVAL; 5263 } 5264 5265 return count; 5266 } 5267 5268 static DEVICE_ATTR_WO(failover); 5269 5270 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5271 { 5272 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5273 struct ibmvnic_adapter *adapter; 5274 struct iommu_table *tbl; 5275 unsigned long ret = 0; 5276 int i; 5277 5278 tbl = get_iommu_table_base(&vdev->dev); 5279 5280 /* netdev inits at probe time along with the structures we need below*/ 5281 if (!netdev) 5282 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5283 5284 adapter = netdev_priv(netdev); 5285 5286 ret += PAGE_SIZE; /* the crq message queue */ 5287 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5288 5289 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5290 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5291 5292 for (i = 0; i < adapter->num_active_rx_pools; i++) 5293 ret += adapter->rx_pool[i].size * 5294 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5295 5296 return ret; 5297 } 5298 5299 static int ibmvnic_resume(struct device *dev) 5300 { 5301 struct net_device *netdev = dev_get_drvdata(dev); 5302 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5303 5304 if (adapter->state != VNIC_OPEN) 5305 return 0; 5306 5307 tasklet_schedule(&adapter->tasklet); 5308 5309 return 0; 5310 } 5311 5312 static const struct vio_device_id ibmvnic_device_table[] = { 5313 {"network", "IBM,vnic"}, 5314 {"", "" } 5315 }; 5316 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5317 5318 static const struct dev_pm_ops ibmvnic_pm_ops = { 5319 .resume = ibmvnic_resume 5320 }; 5321 5322 static struct vio_driver ibmvnic_driver = { 5323 .id_table = ibmvnic_device_table, 5324 .probe = ibmvnic_probe, 5325 .remove = ibmvnic_remove, 5326 .get_desired_dma = ibmvnic_get_desired_dma, 5327 .name = ibmvnic_driver_name, 5328 .pm = &ibmvnic_pm_ops, 5329 }; 5330 5331 /* module functions */ 5332 static int __init ibmvnic_module_init(void) 5333 { 5334 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5335 IBMVNIC_DRIVER_VERSION); 5336 5337 return vio_register_driver(&ibmvnic_driver); 5338 } 5339 5340 static void __exit ibmvnic_module_exit(void) 5341 { 5342 vio_unregister_driver(&ibmvnic_driver); 5343 } 5344 5345 module_init(ibmvnic_module_init); 5346 module_exit(ibmvnic_module_exit); 5347