1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/kthread.h> 57 #include <linux/seq_file.h> 58 #include <linux/interrupt.h> 59 #include <net/net_namespace.h> 60 #include <asm/hvcall.h> 61 #include <linux/atomic.h> 62 #include <asm/vio.h> 63 #include <asm/iommu.h> 64 #include <linux/uaccess.h> 65 #include <asm/firmware.h> 66 #include <linux/workqueue.h> 67 #include <linux/if_vlan.h> 68 #include <linux/utsname.h> 69 70 #include "ibmvnic.h" 71 72 static const char ibmvnic_driver_name[] = "ibmvnic"; 73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 74 75 MODULE_AUTHOR("Santiago Leon"); 76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 77 MODULE_LICENSE("GPL"); 78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 79 80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 81 static int ibmvnic_remove(struct vio_dev *); 82 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 87 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 88 union sub_crq *sub_crq); 89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 91 static int enable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int disable_scrq_irq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static int pending_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 98 struct ibmvnic_sub_crq_queue *); 99 static int ibmvnic_poll(struct napi_struct *napi, int data); 100 static void send_query_map(struct ibmvnic_adapter *adapter); 101 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 102 static int send_request_unmap(struct ibmvnic_adapter *, u8); 103 static int send_login(struct ibmvnic_adapter *adapter); 104 static void send_query_cap(struct ibmvnic_adapter *adapter); 105 static int init_sub_crqs(struct ibmvnic_adapter *); 106 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 107 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 108 static void release_crq_queue(struct ibmvnic_adapter *); 109 static int __ibmvnic_set_mac(struct net_device *, u8 *); 110 static int init_crq_queue(struct ibmvnic_adapter *adapter); 111 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 112 113 struct ibmvnic_stat { 114 char name[ETH_GSTRING_LEN]; 115 int offset; 116 }; 117 118 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 119 offsetof(struct ibmvnic_statistics, stat)) 120 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 121 122 static const struct ibmvnic_stat ibmvnic_stats[] = { 123 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 124 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 125 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 126 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 127 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 128 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 129 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 130 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 131 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 132 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 133 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 134 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 135 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 136 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 137 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 138 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 139 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 140 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 141 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 142 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 143 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 144 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 145 }; 146 147 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 148 unsigned long length, unsigned long *number, 149 unsigned long *irq) 150 { 151 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 152 long rc; 153 154 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 155 *number = retbuf[0]; 156 *irq = retbuf[1]; 157 158 return rc; 159 } 160 161 /** 162 * ibmvnic_wait_for_completion - Check device state and wait for completion 163 * @adapter: private device data 164 * @comp_done: completion structure to wait for 165 * @timeout: time to wait in milliseconds 166 * 167 * Wait for a completion signal or until the timeout limit is reached 168 * while checking that the device is still active. 169 */ 170 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 171 struct completion *comp_done, 172 unsigned long timeout) 173 { 174 struct net_device *netdev; 175 unsigned long div_timeout; 176 u8 retry; 177 178 netdev = adapter->netdev; 179 retry = 5; 180 div_timeout = msecs_to_jiffies(timeout / retry); 181 while (true) { 182 if (!adapter->crq.active) { 183 netdev_err(netdev, "Device down!\n"); 184 return -ENODEV; 185 } 186 if (!retry--) 187 break; 188 if (wait_for_completion_timeout(comp_done, div_timeout)) 189 return 0; 190 } 191 netdev_err(netdev, "Operation timed out.\n"); 192 return -ETIMEDOUT; 193 } 194 195 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 196 struct ibmvnic_long_term_buff *ltb, int size) 197 { 198 struct device *dev = &adapter->vdev->dev; 199 int rc; 200 201 ltb->size = size; 202 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 203 GFP_KERNEL); 204 205 if (!ltb->buff) { 206 dev_err(dev, "Couldn't alloc long term buffer\n"); 207 return -ENOMEM; 208 } 209 ltb->map_id = adapter->map_id; 210 adapter->map_id++; 211 212 mutex_lock(&adapter->fw_lock); 213 adapter->fw_done_rc = 0; 214 reinit_completion(&adapter->fw_done); 215 rc = send_request_map(adapter, ltb->addr, 216 ltb->size, ltb->map_id); 217 if (rc) { 218 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 219 mutex_unlock(&adapter->fw_lock); 220 return rc; 221 } 222 223 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 224 if (rc) { 225 dev_err(dev, 226 "Long term map request aborted or timed out,rc = %d\n", 227 rc); 228 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 229 mutex_unlock(&adapter->fw_lock); 230 return rc; 231 } 232 233 if (adapter->fw_done_rc) { 234 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 235 adapter->fw_done_rc); 236 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 237 mutex_unlock(&adapter->fw_lock); 238 return -1; 239 } 240 mutex_unlock(&adapter->fw_lock); 241 return 0; 242 } 243 244 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 245 struct ibmvnic_long_term_buff *ltb) 246 { 247 struct device *dev = &adapter->vdev->dev; 248 249 if (!ltb->buff) 250 return; 251 252 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 253 adapter->reset_reason != VNIC_RESET_MOBILITY) 254 send_request_unmap(adapter, ltb->map_id); 255 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 256 } 257 258 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 259 struct ibmvnic_long_term_buff *ltb) 260 { 261 struct device *dev = &adapter->vdev->dev; 262 int rc; 263 264 memset(ltb->buff, 0, ltb->size); 265 266 mutex_lock(&adapter->fw_lock); 267 adapter->fw_done_rc = 0; 268 269 reinit_completion(&adapter->fw_done); 270 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 271 if (rc) { 272 mutex_unlock(&adapter->fw_lock); 273 return rc; 274 } 275 276 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 277 if (rc) { 278 dev_info(dev, 279 "Reset failed, long term map request timed out or aborted\n"); 280 mutex_unlock(&adapter->fw_lock); 281 return rc; 282 } 283 284 if (adapter->fw_done_rc) { 285 dev_info(dev, 286 "Reset failed, attempting to free and reallocate buffer\n"); 287 free_long_term_buff(adapter, ltb); 288 mutex_unlock(&adapter->fw_lock); 289 return alloc_long_term_buff(adapter, ltb, ltb->size); 290 } 291 mutex_unlock(&adapter->fw_lock); 292 return 0; 293 } 294 295 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 296 { 297 int i; 298 299 for (i = 0; i < adapter->num_active_rx_pools; i++) 300 adapter->rx_pool[i].active = 0; 301 } 302 303 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 304 struct ibmvnic_rx_pool *pool) 305 { 306 int count = pool->size - atomic_read(&pool->available); 307 u64 handle = adapter->rx_scrq[pool->index]->handle; 308 struct device *dev = &adapter->vdev->dev; 309 int buffers_added = 0; 310 unsigned long lpar_rc; 311 union sub_crq sub_crq; 312 struct sk_buff *skb; 313 unsigned int offset; 314 dma_addr_t dma_addr; 315 unsigned char *dst; 316 int shift = 0; 317 int index; 318 int i; 319 320 if (!pool->active) 321 return; 322 323 for (i = 0; i < count; ++i) { 324 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 325 if (!skb) { 326 dev_err(dev, "Couldn't replenish rx buff\n"); 327 adapter->replenish_no_mem++; 328 break; 329 } 330 331 index = pool->free_map[pool->next_free]; 332 333 if (pool->rx_buff[index].skb) 334 dev_err(dev, "Inconsistent free_map!\n"); 335 336 /* Copy the skb to the long term mapped DMA buffer */ 337 offset = index * pool->buff_size; 338 dst = pool->long_term_buff.buff + offset; 339 memset(dst, 0, pool->buff_size); 340 dma_addr = pool->long_term_buff.addr + offset; 341 pool->rx_buff[index].data = dst; 342 343 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 344 pool->rx_buff[index].dma = dma_addr; 345 pool->rx_buff[index].skb = skb; 346 pool->rx_buff[index].pool_index = pool->index; 347 pool->rx_buff[index].size = pool->buff_size; 348 349 memset(&sub_crq, 0, sizeof(sub_crq)); 350 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 351 sub_crq.rx_add.correlator = 352 cpu_to_be64((u64)&pool->rx_buff[index]); 353 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 354 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 355 356 /* The length field of the sCRQ is defined to be 24 bits so the 357 * buffer size needs to be left shifted by a byte before it is 358 * converted to big endian to prevent the last byte from being 359 * truncated. 360 */ 361 #ifdef __LITTLE_ENDIAN__ 362 shift = 8; 363 #endif 364 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 365 366 lpar_rc = send_subcrq(adapter, handle, &sub_crq); 367 if (lpar_rc != H_SUCCESS) 368 goto failure; 369 370 buffers_added++; 371 adapter->replenish_add_buff_success++; 372 pool->next_free = (pool->next_free + 1) % pool->size; 373 } 374 atomic_add(buffers_added, &pool->available); 375 return; 376 377 failure: 378 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 379 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 380 pool->free_map[pool->next_free] = index; 381 pool->rx_buff[index].skb = NULL; 382 383 dev_kfree_skb_any(skb); 384 adapter->replenish_add_buff_failure++; 385 atomic_add(buffers_added, &pool->available); 386 387 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 388 /* Disable buffer pool replenishment and report carrier off if 389 * queue is closed or pending failover. 390 * Firmware guarantees that a signal will be sent to the 391 * driver, triggering a reset. 392 */ 393 deactivate_rx_pools(adapter); 394 netif_carrier_off(adapter->netdev); 395 } 396 } 397 398 static void replenish_pools(struct ibmvnic_adapter *adapter) 399 { 400 int i; 401 402 adapter->replenish_task_cycles++; 403 for (i = 0; i < adapter->num_active_rx_pools; i++) { 404 if (adapter->rx_pool[i].active) 405 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 406 } 407 } 408 409 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 410 { 411 kfree(adapter->tx_stats_buffers); 412 kfree(adapter->rx_stats_buffers); 413 adapter->tx_stats_buffers = NULL; 414 adapter->rx_stats_buffers = NULL; 415 } 416 417 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 418 { 419 adapter->tx_stats_buffers = 420 kcalloc(IBMVNIC_MAX_QUEUES, 421 sizeof(struct ibmvnic_tx_queue_stats), 422 GFP_KERNEL); 423 if (!adapter->tx_stats_buffers) 424 return -ENOMEM; 425 426 adapter->rx_stats_buffers = 427 kcalloc(IBMVNIC_MAX_QUEUES, 428 sizeof(struct ibmvnic_rx_queue_stats), 429 GFP_KERNEL); 430 if (!adapter->rx_stats_buffers) 431 return -ENOMEM; 432 433 return 0; 434 } 435 436 static void release_stats_token(struct ibmvnic_adapter *adapter) 437 { 438 struct device *dev = &adapter->vdev->dev; 439 440 if (!adapter->stats_token) 441 return; 442 443 dma_unmap_single(dev, adapter->stats_token, 444 sizeof(struct ibmvnic_statistics), 445 DMA_FROM_DEVICE); 446 adapter->stats_token = 0; 447 } 448 449 static int init_stats_token(struct ibmvnic_adapter *adapter) 450 { 451 struct device *dev = &adapter->vdev->dev; 452 dma_addr_t stok; 453 454 stok = dma_map_single(dev, &adapter->stats, 455 sizeof(struct ibmvnic_statistics), 456 DMA_FROM_DEVICE); 457 if (dma_mapping_error(dev, stok)) { 458 dev_err(dev, "Couldn't map stats buffer\n"); 459 return -1; 460 } 461 462 adapter->stats_token = stok; 463 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 464 return 0; 465 } 466 467 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 468 { 469 struct ibmvnic_rx_pool *rx_pool; 470 u64 buff_size; 471 int rx_scrqs; 472 int i, j, rc; 473 474 if (!adapter->rx_pool) 475 return -1; 476 477 buff_size = adapter->cur_rx_buf_sz; 478 rx_scrqs = adapter->num_active_rx_pools; 479 for (i = 0; i < rx_scrqs; i++) { 480 rx_pool = &adapter->rx_pool[i]; 481 482 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 483 484 if (rx_pool->buff_size != buff_size) { 485 free_long_term_buff(adapter, &rx_pool->long_term_buff); 486 rx_pool->buff_size = buff_size; 487 rc = alloc_long_term_buff(adapter, 488 &rx_pool->long_term_buff, 489 rx_pool->size * 490 rx_pool->buff_size); 491 } else { 492 rc = reset_long_term_buff(adapter, 493 &rx_pool->long_term_buff); 494 } 495 496 if (rc) 497 return rc; 498 499 for (j = 0; j < rx_pool->size; j++) 500 rx_pool->free_map[j] = j; 501 502 memset(rx_pool->rx_buff, 0, 503 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 504 505 atomic_set(&rx_pool->available, 0); 506 rx_pool->next_alloc = 0; 507 rx_pool->next_free = 0; 508 rx_pool->active = 1; 509 } 510 511 return 0; 512 } 513 514 static void release_rx_pools(struct ibmvnic_adapter *adapter) 515 { 516 struct ibmvnic_rx_pool *rx_pool; 517 int i, j; 518 519 if (!adapter->rx_pool) 520 return; 521 522 for (i = 0; i < adapter->num_active_rx_pools; i++) { 523 rx_pool = &adapter->rx_pool[i]; 524 525 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 526 527 kfree(rx_pool->free_map); 528 free_long_term_buff(adapter, &rx_pool->long_term_buff); 529 530 if (!rx_pool->rx_buff) 531 continue; 532 533 for (j = 0; j < rx_pool->size; j++) { 534 if (rx_pool->rx_buff[j].skb) { 535 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 536 rx_pool->rx_buff[j].skb = NULL; 537 } 538 } 539 540 kfree(rx_pool->rx_buff); 541 } 542 543 kfree(adapter->rx_pool); 544 adapter->rx_pool = NULL; 545 adapter->num_active_rx_pools = 0; 546 } 547 548 static int init_rx_pools(struct net_device *netdev) 549 { 550 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 551 struct device *dev = &adapter->vdev->dev; 552 struct ibmvnic_rx_pool *rx_pool; 553 int rxadd_subcrqs; 554 u64 buff_size; 555 int i, j; 556 557 rxadd_subcrqs = adapter->num_active_rx_scrqs; 558 buff_size = adapter->cur_rx_buf_sz; 559 560 adapter->rx_pool = kcalloc(rxadd_subcrqs, 561 sizeof(struct ibmvnic_rx_pool), 562 GFP_KERNEL); 563 if (!adapter->rx_pool) { 564 dev_err(dev, "Failed to allocate rx pools\n"); 565 return -1; 566 } 567 568 adapter->num_active_rx_pools = rxadd_subcrqs; 569 570 for (i = 0; i < rxadd_subcrqs; i++) { 571 rx_pool = &adapter->rx_pool[i]; 572 573 netdev_dbg(adapter->netdev, 574 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 575 i, adapter->req_rx_add_entries_per_subcrq, 576 buff_size); 577 578 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 579 rx_pool->index = i; 580 rx_pool->buff_size = buff_size; 581 rx_pool->active = 1; 582 583 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 584 GFP_KERNEL); 585 if (!rx_pool->free_map) { 586 release_rx_pools(adapter); 587 return -1; 588 } 589 590 rx_pool->rx_buff = kcalloc(rx_pool->size, 591 sizeof(struct ibmvnic_rx_buff), 592 GFP_KERNEL); 593 if (!rx_pool->rx_buff) { 594 dev_err(dev, "Couldn't alloc rx buffers\n"); 595 release_rx_pools(adapter); 596 return -1; 597 } 598 599 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 600 rx_pool->size * rx_pool->buff_size)) { 601 release_rx_pools(adapter); 602 return -1; 603 } 604 605 for (j = 0; j < rx_pool->size; ++j) 606 rx_pool->free_map[j] = j; 607 608 atomic_set(&rx_pool->available, 0); 609 rx_pool->next_alloc = 0; 610 rx_pool->next_free = 0; 611 } 612 613 return 0; 614 } 615 616 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 617 struct ibmvnic_tx_pool *tx_pool) 618 { 619 int rc, i; 620 621 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 622 if (rc) 623 return rc; 624 625 memset(tx_pool->tx_buff, 0, 626 tx_pool->num_buffers * 627 sizeof(struct ibmvnic_tx_buff)); 628 629 for (i = 0; i < tx_pool->num_buffers; i++) 630 tx_pool->free_map[i] = i; 631 632 tx_pool->consumer_index = 0; 633 tx_pool->producer_index = 0; 634 635 return 0; 636 } 637 638 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 639 { 640 int tx_scrqs; 641 int i, rc; 642 643 if (!adapter->tx_pool) 644 return -1; 645 646 tx_scrqs = adapter->num_active_tx_pools; 647 for (i = 0; i < tx_scrqs; i++) { 648 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 649 if (rc) 650 return rc; 651 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 652 if (rc) 653 return rc; 654 } 655 656 return 0; 657 } 658 659 static void release_vpd_data(struct ibmvnic_adapter *adapter) 660 { 661 if (!adapter->vpd) 662 return; 663 664 kfree(adapter->vpd->buff); 665 kfree(adapter->vpd); 666 667 adapter->vpd = NULL; 668 } 669 670 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 671 struct ibmvnic_tx_pool *tx_pool) 672 { 673 kfree(tx_pool->tx_buff); 674 kfree(tx_pool->free_map); 675 free_long_term_buff(adapter, &tx_pool->long_term_buff); 676 } 677 678 static void release_tx_pools(struct ibmvnic_adapter *adapter) 679 { 680 int i; 681 682 if (!adapter->tx_pool) 683 return; 684 685 for (i = 0; i < adapter->num_active_tx_pools; i++) { 686 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 687 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 688 } 689 690 kfree(adapter->tx_pool); 691 adapter->tx_pool = NULL; 692 kfree(adapter->tso_pool); 693 adapter->tso_pool = NULL; 694 adapter->num_active_tx_pools = 0; 695 } 696 697 static int init_one_tx_pool(struct net_device *netdev, 698 struct ibmvnic_tx_pool *tx_pool, 699 int num_entries, int buf_size) 700 { 701 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 702 int i; 703 704 tx_pool->tx_buff = kcalloc(num_entries, 705 sizeof(struct ibmvnic_tx_buff), 706 GFP_KERNEL); 707 if (!tx_pool->tx_buff) 708 return -1; 709 710 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 711 num_entries * buf_size)) 712 return -1; 713 714 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 715 if (!tx_pool->free_map) 716 return -1; 717 718 for (i = 0; i < num_entries; i++) 719 tx_pool->free_map[i] = i; 720 721 tx_pool->consumer_index = 0; 722 tx_pool->producer_index = 0; 723 tx_pool->num_buffers = num_entries; 724 tx_pool->buf_size = buf_size; 725 726 return 0; 727 } 728 729 static int init_tx_pools(struct net_device *netdev) 730 { 731 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 732 int tx_subcrqs; 733 int i, rc; 734 735 tx_subcrqs = adapter->num_active_tx_scrqs; 736 adapter->tx_pool = kcalloc(tx_subcrqs, 737 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 738 if (!adapter->tx_pool) 739 return -1; 740 741 adapter->tso_pool = kcalloc(tx_subcrqs, 742 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 743 if (!adapter->tso_pool) 744 return -1; 745 746 adapter->num_active_tx_pools = tx_subcrqs; 747 748 for (i = 0; i < tx_subcrqs; i++) { 749 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 750 adapter->req_tx_entries_per_subcrq, 751 adapter->req_mtu + VLAN_HLEN); 752 if (rc) { 753 release_tx_pools(adapter); 754 return rc; 755 } 756 757 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 758 IBMVNIC_TSO_BUFS, 759 IBMVNIC_TSO_BUF_SZ); 760 if (rc) { 761 release_tx_pools(adapter); 762 return rc; 763 } 764 } 765 766 return 0; 767 } 768 769 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 770 { 771 int i; 772 773 if (adapter->napi_enabled) 774 return; 775 776 for (i = 0; i < adapter->req_rx_queues; i++) 777 napi_enable(&adapter->napi[i]); 778 779 adapter->napi_enabled = true; 780 } 781 782 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 783 { 784 int i; 785 786 if (!adapter->napi_enabled) 787 return; 788 789 for (i = 0; i < adapter->req_rx_queues; i++) { 790 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 791 napi_disable(&adapter->napi[i]); 792 } 793 794 adapter->napi_enabled = false; 795 } 796 797 static int init_napi(struct ibmvnic_adapter *adapter) 798 { 799 int i; 800 801 adapter->napi = kcalloc(adapter->req_rx_queues, 802 sizeof(struct napi_struct), GFP_KERNEL); 803 if (!adapter->napi) 804 return -ENOMEM; 805 806 for (i = 0; i < adapter->req_rx_queues; i++) { 807 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 808 netif_napi_add(adapter->netdev, &adapter->napi[i], 809 ibmvnic_poll, NAPI_POLL_WEIGHT); 810 } 811 812 adapter->num_active_rx_napi = adapter->req_rx_queues; 813 return 0; 814 } 815 816 static void release_napi(struct ibmvnic_adapter *adapter) 817 { 818 int i; 819 820 if (!adapter->napi) 821 return; 822 823 for (i = 0; i < adapter->num_active_rx_napi; i++) { 824 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 825 netif_napi_del(&adapter->napi[i]); 826 } 827 828 kfree(adapter->napi); 829 adapter->napi = NULL; 830 adapter->num_active_rx_napi = 0; 831 adapter->napi_enabled = false; 832 } 833 834 static int ibmvnic_login(struct net_device *netdev) 835 { 836 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 837 unsigned long timeout = msecs_to_jiffies(30000); 838 int retry_count = 0; 839 int retries = 10; 840 bool retry; 841 int rc; 842 843 do { 844 retry = false; 845 if (retry_count > retries) { 846 netdev_warn(netdev, "Login attempts exceeded\n"); 847 return -1; 848 } 849 850 adapter->init_done_rc = 0; 851 reinit_completion(&adapter->init_done); 852 rc = send_login(adapter); 853 if (rc) { 854 netdev_warn(netdev, "Unable to login\n"); 855 return rc; 856 } 857 858 if (!wait_for_completion_timeout(&adapter->init_done, 859 timeout)) { 860 netdev_warn(netdev, "Login timed out, retrying...\n"); 861 retry = true; 862 adapter->init_done_rc = 0; 863 retry_count++; 864 continue; 865 } 866 867 if (adapter->init_done_rc == ABORTED) { 868 netdev_warn(netdev, "Login aborted, retrying...\n"); 869 retry = true; 870 adapter->init_done_rc = 0; 871 retry_count++; 872 /* FW or device may be busy, so 873 * wait a bit before retrying login 874 */ 875 msleep(500); 876 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 877 retry_count++; 878 release_sub_crqs(adapter, 1); 879 880 retry = true; 881 netdev_dbg(netdev, 882 "Received partial success, retrying...\n"); 883 adapter->init_done_rc = 0; 884 reinit_completion(&adapter->init_done); 885 send_query_cap(adapter); 886 if (!wait_for_completion_timeout(&adapter->init_done, 887 timeout)) { 888 netdev_warn(netdev, 889 "Capabilities query timed out\n"); 890 return -1; 891 } 892 893 rc = init_sub_crqs(adapter); 894 if (rc) { 895 netdev_warn(netdev, 896 "SCRQ initialization failed\n"); 897 return -1; 898 } 899 900 rc = init_sub_crq_irqs(adapter); 901 if (rc) { 902 netdev_warn(netdev, 903 "SCRQ irq initialization failed\n"); 904 return -1; 905 } 906 } else if (adapter->init_done_rc) { 907 netdev_warn(netdev, "Adapter login failed\n"); 908 return -1; 909 } 910 } while (retry); 911 912 __ibmvnic_set_mac(netdev, adapter->mac_addr); 913 914 return 0; 915 } 916 917 static void release_login_buffer(struct ibmvnic_adapter *adapter) 918 { 919 kfree(adapter->login_buf); 920 adapter->login_buf = NULL; 921 } 922 923 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 924 { 925 kfree(adapter->login_rsp_buf); 926 adapter->login_rsp_buf = NULL; 927 } 928 929 static void release_resources(struct ibmvnic_adapter *adapter) 930 { 931 release_vpd_data(adapter); 932 933 release_tx_pools(adapter); 934 release_rx_pools(adapter); 935 936 release_napi(adapter); 937 release_login_rsp_buffer(adapter); 938 } 939 940 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 941 { 942 struct net_device *netdev = adapter->netdev; 943 unsigned long timeout = msecs_to_jiffies(30000); 944 union ibmvnic_crq crq; 945 bool resend; 946 int rc; 947 948 netdev_dbg(netdev, "setting link state %d\n", link_state); 949 950 memset(&crq, 0, sizeof(crq)); 951 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 952 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 953 crq.logical_link_state.link_state = link_state; 954 955 do { 956 resend = false; 957 958 reinit_completion(&adapter->init_done); 959 rc = ibmvnic_send_crq(adapter, &crq); 960 if (rc) { 961 netdev_err(netdev, "Failed to set link state\n"); 962 return rc; 963 } 964 965 if (!wait_for_completion_timeout(&adapter->init_done, 966 timeout)) { 967 netdev_err(netdev, "timeout setting link state\n"); 968 return -1; 969 } 970 971 if (adapter->init_done_rc == PARTIALSUCCESS) { 972 /* Partuial success, delay and re-send */ 973 mdelay(1000); 974 resend = true; 975 } else if (adapter->init_done_rc) { 976 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 977 adapter->init_done_rc); 978 return adapter->init_done_rc; 979 } 980 } while (resend); 981 982 return 0; 983 } 984 985 static int set_real_num_queues(struct net_device *netdev) 986 { 987 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 988 int rc; 989 990 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 991 adapter->req_tx_queues, adapter->req_rx_queues); 992 993 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 994 if (rc) { 995 netdev_err(netdev, "failed to set the number of tx queues\n"); 996 return rc; 997 } 998 999 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1000 if (rc) 1001 netdev_err(netdev, "failed to set the number of rx queues\n"); 1002 1003 return rc; 1004 } 1005 1006 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1007 { 1008 struct device *dev = &adapter->vdev->dev; 1009 union ibmvnic_crq crq; 1010 int len = 0; 1011 int rc; 1012 1013 if (adapter->vpd->buff) 1014 len = adapter->vpd->len; 1015 1016 mutex_lock(&adapter->fw_lock); 1017 adapter->fw_done_rc = 0; 1018 reinit_completion(&adapter->fw_done); 1019 1020 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1021 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1022 rc = ibmvnic_send_crq(adapter, &crq); 1023 if (rc) { 1024 mutex_unlock(&adapter->fw_lock); 1025 return rc; 1026 } 1027 1028 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1029 if (rc) { 1030 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1031 mutex_unlock(&adapter->fw_lock); 1032 return rc; 1033 } 1034 mutex_unlock(&adapter->fw_lock); 1035 1036 if (!adapter->vpd->len) 1037 return -ENODATA; 1038 1039 if (!adapter->vpd->buff) 1040 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1041 else if (adapter->vpd->len != len) 1042 adapter->vpd->buff = 1043 krealloc(adapter->vpd->buff, 1044 adapter->vpd->len, GFP_KERNEL); 1045 1046 if (!adapter->vpd->buff) { 1047 dev_err(dev, "Could allocate VPD buffer\n"); 1048 return -ENOMEM; 1049 } 1050 1051 adapter->vpd->dma_addr = 1052 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1053 DMA_FROM_DEVICE); 1054 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1055 dev_err(dev, "Could not map VPD buffer\n"); 1056 kfree(adapter->vpd->buff); 1057 adapter->vpd->buff = NULL; 1058 return -ENOMEM; 1059 } 1060 1061 mutex_lock(&adapter->fw_lock); 1062 adapter->fw_done_rc = 0; 1063 reinit_completion(&adapter->fw_done); 1064 1065 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1066 crq.get_vpd.cmd = GET_VPD; 1067 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1068 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1069 rc = ibmvnic_send_crq(adapter, &crq); 1070 if (rc) { 1071 kfree(adapter->vpd->buff); 1072 adapter->vpd->buff = NULL; 1073 mutex_unlock(&adapter->fw_lock); 1074 return rc; 1075 } 1076 1077 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1078 if (rc) { 1079 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1080 kfree(adapter->vpd->buff); 1081 adapter->vpd->buff = NULL; 1082 mutex_unlock(&adapter->fw_lock); 1083 return rc; 1084 } 1085 1086 mutex_unlock(&adapter->fw_lock); 1087 return 0; 1088 } 1089 1090 static int init_resources(struct ibmvnic_adapter *adapter) 1091 { 1092 struct net_device *netdev = adapter->netdev; 1093 int rc; 1094 1095 rc = set_real_num_queues(netdev); 1096 if (rc) 1097 return rc; 1098 1099 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1100 if (!adapter->vpd) 1101 return -ENOMEM; 1102 1103 /* Vital Product Data (VPD) */ 1104 rc = ibmvnic_get_vpd(adapter); 1105 if (rc) { 1106 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1107 return rc; 1108 } 1109 1110 adapter->map_id = 1; 1111 1112 rc = init_napi(adapter); 1113 if (rc) 1114 return rc; 1115 1116 send_query_map(adapter); 1117 1118 rc = init_rx_pools(netdev); 1119 if (rc) 1120 return rc; 1121 1122 rc = init_tx_pools(netdev); 1123 return rc; 1124 } 1125 1126 static int __ibmvnic_open(struct net_device *netdev) 1127 { 1128 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1129 enum vnic_state prev_state = adapter->state; 1130 int i, rc; 1131 1132 adapter->state = VNIC_OPENING; 1133 replenish_pools(adapter); 1134 ibmvnic_napi_enable(adapter); 1135 1136 /* We're ready to receive frames, enable the sub-crq interrupts and 1137 * set the logical link state to up 1138 */ 1139 for (i = 0; i < adapter->req_rx_queues; i++) { 1140 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1141 if (prev_state == VNIC_CLOSED) 1142 enable_irq(adapter->rx_scrq[i]->irq); 1143 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1144 } 1145 1146 for (i = 0; i < adapter->req_tx_queues; i++) { 1147 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1148 if (prev_state == VNIC_CLOSED) 1149 enable_irq(adapter->tx_scrq[i]->irq); 1150 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1151 } 1152 1153 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1154 if (rc) { 1155 for (i = 0; i < adapter->req_rx_queues; i++) 1156 napi_disable(&adapter->napi[i]); 1157 release_resources(adapter); 1158 return rc; 1159 } 1160 1161 netif_tx_start_all_queues(netdev); 1162 1163 if (prev_state == VNIC_CLOSED) { 1164 for (i = 0; i < adapter->req_rx_queues; i++) 1165 napi_schedule(&adapter->napi[i]); 1166 } 1167 1168 adapter->state = VNIC_OPEN; 1169 return rc; 1170 } 1171 1172 static int ibmvnic_open(struct net_device *netdev) 1173 { 1174 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1175 int rc; 1176 1177 /* If device failover is pending, just set device state and return. 1178 * Device operation will be handled by reset routine. 1179 */ 1180 if (adapter->failover_pending) { 1181 adapter->state = VNIC_OPEN; 1182 return 0; 1183 } 1184 1185 if (adapter->state != VNIC_CLOSED) { 1186 rc = ibmvnic_login(netdev); 1187 if (rc) 1188 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 2028 rc = reset_rx_pools(adapter); 2029 if (rc) { 2030 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2031 rc); 2032 goto out; 2033 } 2034 } 2035 ibmvnic_disable_irqs(adapter); 2036 } 2037 adapter->state = VNIC_CLOSED; 2038 2039 if (reset_state == VNIC_CLOSED) { 2040 rc = 0; 2041 goto out; 2042 } 2043 2044 rc = __ibmvnic_open(netdev); 2045 if (rc) { 2046 rc = IBMVNIC_OPEN_FAILED; 2047 goto out; 2048 } 2049 2050 /* refresh device's multicast list */ 2051 ibmvnic_set_multi(netdev); 2052 2053 /* kick napi */ 2054 for (i = 0; i < adapter->req_rx_queues; i++) 2055 napi_schedule(&adapter->napi[i]); 2056 2057 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 2058 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2059 2060 rc = 0; 2061 2062 out: 2063 rtnl_unlock(); 2064 2065 return rc; 2066 } 2067 2068 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2069 struct ibmvnic_rwi *rwi, u32 reset_state) 2070 { 2071 struct net_device *netdev = adapter->netdev; 2072 int rc; 2073 2074 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2075 rwi->reset_reason); 2076 2077 netif_carrier_off(netdev); 2078 adapter->reset_reason = rwi->reset_reason; 2079 2080 ibmvnic_cleanup(netdev); 2081 release_resources(adapter); 2082 release_sub_crqs(adapter, 0); 2083 release_crq_queue(adapter); 2084 2085 /* remove the closed state so when we call open it appears 2086 * we are coming from the probed state. 2087 */ 2088 adapter->state = VNIC_PROBED; 2089 2090 reinit_completion(&adapter->init_done); 2091 rc = init_crq_queue(adapter); 2092 if (rc) { 2093 netdev_err(adapter->netdev, 2094 "Couldn't initialize crq. rc=%d\n", rc); 2095 return rc; 2096 } 2097 2098 rc = ibmvnic_reset_init(adapter, false); 2099 if (rc) 2100 return rc; 2101 2102 /* If the adapter was in PROBE state prior to the reset, 2103 * exit here. 2104 */ 2105 if (reset_state == VNIC_PROBED) 2106 return 0; 2107 2108 rc = ibmvnic_login(netdev); 2109 if (rc) { 2110 adapter->state = VNIC_PROBED; 2111 return 0; 2112 } 2113 2114 rc = init_resources(adapter); 2115 if (rc) 2116 return rc; 2117 2118 ibmvnic_disable_irqs(adapter); 2119 adapter->state = VNIC_CLOSED; 2120 2121 if (reset_state == VNIC_CLOSED) 2122 return 0; 2123 2124 rc = __ibmvnic_open(netdev); 2125 if (rc) 2126 return IBMVNIC_OPEN_FAILED; 2127 2128 return 0; 2129 } 2130 2131 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2132 { 2133 struct ibmvnic_rwi *rwi; 2134 unsigned long flags; 2135 2136 spin_lock_irqsave(&adapter->rwi_lock, flags); 2137 2138 if (!list_empty(&adapter->rwi_list)) { 2139 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2140 list); 2141 list_del(&rwi->list); 2142 } else { 2143 rwi = NULL; 2144 } 2145 2146 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2147 return rwi; 2148 } 2149 2150 static void free_all_rwi(struct ibmvnic_adapter *adapter) 2151 { 2152 struct ibmvnic_rwi *rwi; 2153 2154 rwi = get_next_rwi(adapter); 2155 while (rwi) { 2156 kfree(rwi); 2157 rwi = get_next_rwi(adapter); 2158 } 2159 } 2160 2161 static void __ibmvnic_reset(struct work_struct *work) 2162 { 2163 struct ibmvnic_rwi *rwi; 2164 struct ibmvnic_adapter *adapter; 2165 bool saved_state = false; 2166 unsigned long flags; 2167 u32 reset_state; 2168 int rc = 0; 2169 2170 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2171 2172 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2173 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2174 IBMVNIC_RESET_DELAY); 2175 return; 2176 } 2177 2178 rwi = get_next_rwi(adapter); 2179 while (rwi) { 2180 spin_lock_irqsave(&adapter->state_lock, flags); 2181 2182 if (adapter->state == VNIC_REMOVING || 2183 adapter->state == VNIC_REMOVED) { 2184 spin_unlock_irqrestore(&adapter->state_lock, flags); 2185 kfree(rwi); 2186 rc = EBUSY; 2187 break; 2188 } 2189 2190 if (!saved_state) { 2191 reset_state = adapter->state; 2192 adapter->state = VNIC_RESETTING; 2193 saved_state = true; 2194 } 2195 spin_unlock_irqrestore(&adapter->state_lock, flags); 2196 2197 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2198 /* CHANGE_PARAM requestor holds rtnl_lock */ 2199 rc = do_change_param_reset(adapter, rwi, reset_state); 2200 } else if (adapter->force_reset_recovery) { 2201 /* Transport event occurred during previous reset */ 2202 if (adapter->wait_for_reset) { 2203 /* Previous was CHANGE_PARAM; caller locked */ 2204 adapter->force_reset_recovery = false; 2205 rc = do_hard_reset(adapter, rwi, reset_state); 2206 } else { 2207 rtnl_lock(); 2208 adapter->force_reset_recovery = false; 2209 rc = do_hard_reset(adapter, rwi, reset_state); 2210 rtnl_unlock(); 2211 } 2212 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL && 2213 adapter->from_passive_init)) { 2214 rc = do_reset(adapter, rwi, reset_state); 2215 } 2216 kfree(rwi); 2217 if (rc == IBMVNIC_OPEN_FAILED) { 2218 if (list_empty(&adapter->rwi_list)) 2219 adapter->state = VNIC_CLOSED; 2220 else 2221 adapter->state = reset_state; 2222 rc = 0; 2223 } else if (rc && rc != IBMVNIC_INIT_FAILED && 2224 !adapter->force_reset_recovery) 2225 break; 2226 2227 rwi = get_next_rwi(adapter); 2228 2229 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2230 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2231 adapter->force_reset_recovery = true; 2232 } 2233 2234 if (adapter->wait_for_reset) { 2235 adapter->reset_done_rc = rc; 2236 complete(&adapter->reset_done); 2237 } 2238 2239 if (rc) { 2240 netdev_dbg(adapter->netdev, "Reset failed\n"); 2241 free_all_rwi(adapter); 2242 } 2243 2244 clear_bit_unlock(0, &adapter->resetting); 2245 } 2246 2247 static void __ibmvnic_delayed_reset(struct work_struct *work) 2248 { 2249 struct ibmvnic_adapter *adapter; 2250 2251 adapter = container_of(work, struct ibmvnic_adapter, 2252 ibmvnic_delayed_reset.work); 2253 __ibmvnic_reset(&adapter->ibmvnic_reset); 2254 } 2255 2256 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2257 enum ibmvnic_reset_reason reason) 2258 { 2259 struct list_head *entry, *tmp_entry; 2260 struct ibmvnic_rwi *rwi, *tmp; 2261 struct net_device *netdev = adapter->netdev; 2262 unsigned long flags; 2263 int ret; 2264 2265 if (adapter->state == VNIC_REMOVING || 2266 adapter->state == VNIC_REMOVED || 2267 adapter->failover_pending) { 2268 ret = EBUSY; 2269 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2270 goto err; 2271 } 2272 2273 if (adapter->state == VNIC_PROBING) { 2274 netdev_warn(netdev, "Adapter reset during probe\n"); 2275 ret = adapter->init_done_rc = EAGAIN; 2276 goto err; 2277 } 2278 2279 spin_lock_irqsave(&adapter->rwi_lock, flags); 2280 2281 list_for_each(entry, &adapter->rwi_list) { 2282 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2283 if (tmp->reset_reason == reason) { 2284 netdev_dbg(netdev, "Skipping matching reset\n"); 2285 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2286 ret = EBUSY; 2287 goto err; 2288 } 2289 } 2290 2291 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2292 if (!rwi) { 2293 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2294 ibmvnic_close(netdev); 2295 ret = ENOMEM; 2296 goto err; 2297 } 2298 /* if we just received a transport event, 2299 * flush reset queue and process this reset 2300 */ 2301 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2302 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2303 list_del(entry); 2304 } 2305 rwi->reset_reason = reason; 2306 list_add_tail(&rwi->list, &adapter->rwi_list); 2307 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2308 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2309 schedule_work(&adapter->ibmvnic_reset); 2310 2311 return 0; 2312 err: 2313 return -ret; 2314 } 2315 2316 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2317 { 2318 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2319 2320 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2321 } 2322 2323 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2324 struct ibmvnic_rx_buff *rx_buff) 2325 { 2326 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2327 2328 rx_buff->skb = NULL; 2329 2330 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2331 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2332 2333 atomic_dec(&pool->available); 2334 } 2335 2336 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2337 { 2338 struct net_device *netdev = napi->dev; 2339 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2340 int scrq_num = (int)(napi - adapter->napi); 2341 int frames_processed = 0; 2342 2343 restart_poll: 2344 while (frames_processed < budget) { 2345 struct sk_buff *skb; 2346 struct ibmvnic_rx_buff *rx_buff; 2347 union sub_crq *next; 2348 u32 length; 2349 u16 offset; 2350 u8 flags = 0; 2351 2352 if (unlikely(test_bit(0, &adapter->resetting) && 2353 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2354 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2355 napi_complete_done(napi, frames_processed); 2356 return frames_processed; 2357 } 2358 2359 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2360 break; 2361 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2362 rx_buff = 2363 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2364 rx_comp.correlator); 2365 /* do error checking */ 2366 if (next->rx_comp.rc) { 2367 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2368 be16_to_cpu(next->rx_comp.rc)); 2369 /* free the entry */ 2370 next->rx_comp.first = 0; 2371 dev_kfree_skb_any(rx_buff->skb); 2372 remove_buff_from_pool(adapter, rx_buff); 2373 continue; 2374 } else if (!rx_buff->skb) { 2375 /* free the entry */ 2376 next->rx_comp.first = 0; 2377 remove_buff_from_pool(adapter, rx_buff); 2378 continue; 2379 } 2380 2381 length = be32_to_cpu(next->rx_comp.len); 2382 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2383 flags = next->rx_comp.flags; 2384 skb = rx_buff->skb; 2385 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2386 length); 2387 2388 /* VLAN Header has been stripped by the system firmware and 2389 * needs to be inserted by the driver 2390 */ 2391 if (adapter->rx_vlan_header_insertion && 2392 (flags & IBMVNIC_VLAN_STRIPPED)) 2393 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2394 ntohs(next->rx_comp.vlan_tci)); 2395 2396 /* free the entry */ 2397 next->rx_comp.first = 0; 2398 remove_buff_from_pool(adapter, rx_buff); 2399 2400 skb_put(skb, length); 2401 skb->protocol = eth_type_trans(skb, netdev); 2402 skb_record_rx_queue(skb, scrq_num); 2403 2404 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2405 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2406 skb->ip_summed = CHECKSUM_UNNECESSARY; 2407 } 2408 2409 length = skb->len; 2410 napi_gro_receive(napi, skb); /* send it up */ 2411 netdev->stats.rx_packets++; 2412 netdev->stats.rx_bytes += length; 2413 adapter->rx_stats_buffers[scrq_num].packets++; 2414 adapter->rx_stats_buffers[scrq_num].bytes += length; 2415 frames_processed++; 2416 } 2417 2418 if (adapter->state != VNIC_CLOSING) 2419 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2420 2421 if (frames_processed < budget) { 2422 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2423 napi_complete_done(napi, frames_processed); 2424 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2425 napi_reschedule(napi)) { 2426 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2427 goto restart_poll; 2428 } 2429 } 2430 return frames_processed; 2431 } 2432 2433 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2434 { 2435 int rc, ret; 2436 2437 adapter->fallback.mtu = adapter->req_mtu; 2438 adapter->fallback.rx_queues = adapter->req_rx_queues; 2439 adapter->fallback.tx_queues = adapter->req_tx_queues; 2440 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2441 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2442 2443 reinit_completion(&adapter->reset_done); 2444 adapter->wait_for_reset = true; 2445 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2446 2447 if (rc) { 2448 ret = rc; 2449 goto out; 2450 } 2451 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2452 if (rc) { 2453 ret = -ENODEV; 2454 goto out; 2455 } 2456 2457 ret = 0; 2458 if (adapter->reset_done_rc) { 2459 ret = -EIO; 2460 adapter->desired.mtu = adapter->fallback.mtu; 2461 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2462 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2463 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2464 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2465 2466 reinit_completion(&adapter->reset_done); 2467 adapter->wait_for_reset = true; 2468 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2469 if (rc) { 2470 ret = rc; 2471 goto out; 2472 } 2473 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2474 60000); 2475 if (rc) { 2476 ret = -ENODEV; 2477 goto out; 2478 } 2479 } 2480 out: 2481 adapter->wait_for_reset = false; 2482 2483 return ret; 2484 } 2485 2486 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2487 { 2488 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2489 2490 adapter->desired.mtu = new_mtu + ETH_HLEN; 2491 2492 return wait_for_reset(adapter); 2493 } 2494 2495 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2496 struct net_device *dev, 2497 netdev_features_t features) 2498 { 2499 /* Some backing hardware adapters can not 2500 * handle packets with a MSS less than 224 2501 * or with only one segment. 2502 */ 2503 if (skb_is_gso(skb)) { 2504 if (skb_shinfo(skb)->gso_size < 224 || 2505 skb_shinfo(skb)->gso_segs == 1) 2506 features &= ~NETIF_F_GSO_MASK; 2507 } 2508 2509 return features; 2510 } 2511 2512 static const struct net_device_ops ibmvnic_netdev_ops = { 2513 .ndo_open = ibmvnic_open, 2514 .ndo_stop = ibmvnic_close, 2515 .ndo_start_xmit = ibmvnic_xmit, 2516 .ndo_set_rx_mode = ibmvnic_set_multi, 2517 .ndo_set_mac_address = ibmvnic_set_mac, 2518 .ndo_validate_addr = eth_validate_addr, 2519 .ndo_tx_timeout = ibmvnic_tx_timeout, 2520 .ndo_change_mtu = ibmvnic_change_mtu, 2521 .ndo_features_check = ibmvnic_features_check, 2522 }; 2523 2524 /* ethtool functions */ 2525 2526 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2527 struct ethtool_link_ksettings *cmd) 2528 { 2529 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2530 int rc; 2531 2532 rc = send_query_phys_parms(adapter); 2533 if (rc) { 2534 adapter->speed = SPEED_UNKNOWN; 2535 adapter->duplex = DUPLEX_UNKNOWN; 2536 } 2537 cmd->base.speed = adapter->speed; 2538 cmd->base.duplex = adapter->duplex; 2539 cmd->base.port = PORT_FIBRE; 2540 cmd->base.phy_address = 0; 2541 cmd->base.autoneg = AUTONEG_ENABLE; 2542 2543 return 0; 2544 } 2545 2546 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2547 struct ethtool_drvinfo *info) 2548 { 2549 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2550 2551 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2552 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2553 strlcpy(info->fw_version, adapter->fw_version, 2554 sizeof(info->fw_version)); 2555 } 2556 2557 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2558 { 2559 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2560 2561 return adapter->msg_enable; 2562 } 2563 2564 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2565 { 2566 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2567 2568 adapter->msg_enable = data; 2569 } 2570 2571 static u32 ibmvnic_get_link(struct net_device *netdev) 2572 { 2573 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2574 2575 /* Don't need to send a query because we request a logical link up at 2576 * init and then we wait for link state indications 2577 */ 2578 return adapter->logical_link_state; 2579 } 2580 2581 static void ibmvnic_get_ringparam(struct net_device *netdev, 2582 struct ethtool_ringparam *ring) 2583 { 2584 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2585 2586 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2587 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2588 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2589 } else { 2590 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2591 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2592 } 2593 ring->rx_mini_max_pending = 0; 2594 ring->rx_jumbo_max_pending = 0; 2595 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2596 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2597 ring->rx_mini_pending = 0; 2598 ring->rx_jumbo_pending = 0; 2599 } 2600 2601 static int ibmvnic_set_ringparam(struct net_device *netdev, 2602 struct ethtool_ringparam *ring) 2603 { 2604 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2605 int ret; 2606 2607 ret = 0; 2608 adapter->desired.rx_entries = ring->rx_pending; 2609 adapter->desired.tx_entries = ring->tx_pending; 2610 2611 ret = wait_for_reset(adapter); 2612 2613 if (!ret && 2614 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2615 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2616 netdev_info(netdev, 2617 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2618 ring->rx_pending, ring->tx_pending, 2619 adapter->req_rx_add_entries_per_subcrq, 2620 adapter->req_tx_entries_per_subcrq); 2621 return ret; 2622 } 2623 2624 static void ibmvnic_get_channels(struct net_device *netdev, 2625 struct ethtool_channels *channels) 2626 { 2627 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2628 2629 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2630 channels->max_rx = adapter->max_rx_queues; 2631 channels->max_tx = adapter->max_tx_queues; 2632 } else { 2633 channels->max_rx = IBMVNIC_MAX_QUEUES; 2634 channels->max_tx = IBMVNIC_MAX_QUEUES; 2635 } 2636 2637 channels->max_other = 0; 2638 channels->max_combined = 0; 2639 channels->rx_count = adapter->req_rx_queues; 2640 channels->tx_count = adapter->req_tx_queues; 2641 channels->other_count = 0; 2642 channels->combined_count = 0; 2643 } 2644 2645 static int ibmvnic_set_channels(struct net_device *netdev, 2646 struct ethtool_channels *channels) 2647 { 2648 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2649 int ret; 2650 2651 ret = 0; 2652 adapter->desired.rx_queues = channels->rx_count; 2653 adapter->desired.tx_queues = channels->tx_count; 2654 2655 ret = wait_for_reset(adapter); 2656 2657 if (!ret && 2658 (adapter->req_rx_queues != channels->rx_count || 2659 adapter->req_tx_queues != channels->tx_count)) 2660 netdev_info(netdev, 2661 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2662 channels->rx_count, channels->tx_count, 2663 adapter->req_rx_queues, adapter->req_tx_queues); 2664 return ret; 2665 2666 } 2667 2668 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2669 { 2670 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2671 int i; 2672 2673 switch (stringset) { 2674 case ETH_SS_STATS: 2675 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2676 i++, data += ETH_GSTRING_LEN) 2677 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2678 2679 for (i = 0; i < adapter->req_tx_queues; i++) { 2680 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2681 data += ETH_GSTRING_LEN; 2682 2683 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2684 data += ETH_GSTRING_LEN; 2685 2686 snprintf(data, ETH_GSTRING_LEN, 2687 "tx%d_dropped_packets", i); 2688 data += ETH_GSTRING_LEN; 2689 } 2690 2691 for (i = 0; i < adapter->req_rx_queues; i++) { 2692 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2693 data += ETH_GSTRING_LEN; 2694 2695 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2696 data += ETH_GSTRING_LEN; 2697 2698 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2699 data += ETH_GSTRING_LEN; 2700 } 2701 break; 2702 2703 case ETH_SS_PRIV_FLAGS: 2704 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2705 strcpy(data + i * ETH_GSTRING_LEN, 2706 ibmvnic_priv_flags[i]); 2707 break; 2708 default: 2709 return; 2710 } 2711 } 2712 2713 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2714 { 2715 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2716 2717 switch (sset) { 2718 case ETH_SS_STATS: 2719 return ARRAY_SIZE(ibmvnic_stats) + 2720 adapter->req_tx_queues * NUM_TX_STATS + 2721 adapter->req_rx_queues * NUM_RX_STATS; 2722 case ETH_SS_PRIV_FLAGS: 2723 return ARRAY_SIZE(ibmvnic_priv_flags); 2724 default: 2725 return -EOPNOTSUPP; 2726 } 2727 } 2728 2729 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2730 struct ethtool_stats *stats, u64 *data) 2731 { 2732 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2733 union ibmvnic_crq crq; 2734 int i, j; 2735 int rc; 2736 2737 memset(&crq, 0, sizeof(crq)); 2738 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2739 crq.request_statistics.cmd = REQUEST_STATISTICS; 2740 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2741 crq.request_statistics.len = 2742 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2743 2744 /* Wait for data to be written */ 2745 reinit_completion(&adapter->stats_done); 2746 rc = ibmvnic_send_crq(adapter, &crq); 2747 if (rc) 2748 return; 2749 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2750 if (rc) 2751 return; 2752 2753 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2754 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2755 ibmvnic_stats[i].offset)); 2756 2757 for (j = 0; j < adapter->req_tx_queues; j++) { 2758 data[i] = adapter->tx_stats_buffers[j].packets; 2759 i++; 2760 data[i] = adapter->tx_stats_buffers[j].bytes; 2761 i++; 2762 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2763 i++; 2764 } 2765 2766 for (j = 0; j < adapter->req_rx_queues; j++) { 2767 data[i] = adapter->rx_stats_buffers[j].packets; 2768 i++; 2769 data[i] = adapter->rx_stats_buffers[j].bytes; 2770 i++; 2771 data[i] = adapter->rx_stats_buffers[j].interrupts; 2772 i++; 2773 } 2774 } 2775 2776 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2777 { 2778 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2779 2780 return adapter->priv_flags; 2781 } 2782 2783 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2784 { 2785 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2786 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2787 2788 if (which_maxes) 2789 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2790 else 2791 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2792 2793 return 0; 2794 } 2795 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2796 .get_drvinfo = ibmvnic_get_drvinfo, 2797 .get_msglevel = ibmvnic_get_msglevel, 2798 .set_msglevel = ibmvnic_set_msglevel, 2799 .get_link = ibmvnic_get_link, 2800 .get_ringparam = ibmvnic_get_ringparam, 2801 .set_ringparam = ibmvnic_set_ringparam, 2802 .get_channels = ibmvnic_get_channels, 2803 .set_channels = ibmvnic_set_channels, 2804 .get_strings = ibmvnic_get_strings, 2805 .get_sset_count = ibmvnic_get_sset_count, 2806 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2807 .get_link_ksettings = ibmvnic_get_link_ksettings, 2808 .get_priv_flags = ibmvnic_get_priv_flags, 2809 .set_priv_flags = ibmvnic_set_priv_flags, 2810 }; 2811 2812 /* Routines for managing CRQs/sCRQs */ 2813 2814 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2815 struct ibmvnic_sub_crq_queue *scrq) 2816 { 2817 int rc; 2818 2819 if (scrq->irq) { 2820 free_irq(scrq->irq, scrq); 2821 irq_dispose_mapping(scrq->irq); 2822 scrq->irq = 0; 2823 } 2824 2825 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2826 atomic_set(&scrq->used, 0); 2827 scrq->cur = 0; 2828 2829 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2830 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2831 return rc; 2832 } 2833 2834 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2835 { 2836 int i, rc; 2837 2838 for (i = 0; i < adapter->req_tx_queues; i++) { 2839 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2840 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2841 if (rc) 2842 return rc; 2843 } 2844 2845 for (i = 0; i < adapter->req_rx_queues; i++) { 2846 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2847 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2848 if (rc) 2849 return rc; 2850 } 2851 2852 return rc; 2853 } 2854 2855 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2856 struct ibmvnic_sub_crq_queue *scrq, 2857 bool do_h_free) 2858 { 2859 struct device *dev = &adapter->vdev->dev; 2860 long rc; 2861 2862 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2863 2864 if (do_h_free) { 2865 /* Close the sub-crqs */ 2866 do { 2867 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2868 adapter->vdev->unit_address, 2869 scrq->crq_num); 2870 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2871 2872 if (rc) { 2873 netdev_err(adapter->netdev, 2874 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2875 scrq->crq_num, rc); 2876 } 2877 } 2878 2879 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2880 DMA_BIDIRECTIONAL); 2881 free_pages((unsigned long)scrq->msgs, 2); 2882 kfree(scrq); 2883 } 2884 2885 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2886 *adapter) 2887 { 2888 struct device *dev = &adapter->vdev->dev; 2889 struct ibmvnic_sub_crq_queue *scrq; 2890 int rc; 2891 2892 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2893 if (!scrq) 2894 return NULL; 2895 2896 scrq->msgs = 2897 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2898 if (!scrq->msgs) { 2899 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2900 goto zero_page_failed; 2901 } 2902 2903 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2904 DMA_BIDIRECTIONAL); 2905 if (dma_mapping_error(dev, scrq->msg_token)) { 2906 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2907 goto map_failed; 2908 } 2909 2910 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2911 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2912 2913 if (rc == H_RESOURCE) 2914 rc = ibmvnic_reset_crq(adapter); 2915 2916 if (rc == H_CLOSED) { 2917 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2918 } else if (rc) { 2919 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2920 goto reg_failed; 2921 } 2922 2923 scrq->adapter = adapter; 2924 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2925 spin_lock_init(&scrq->lock); 2926 2927 netdev_dbg(adapter->netdev, 2928 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2929 scrq->crq_num, scrq->hw_irq, scrq->irq); 2930 2931 return scrq; 2932 2933 reg_failed: 2934 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2935 DMA_BIDIRECTIONAL); 2936 map_failed: 2937 free_pages((unsigned long)scrq->msgs, 2); 2938 zero_page_failed: 2939 kfree(scrq); 2940 2941 return NULL; 2942 } 2943 2944 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2945 { 2946 int i; 2947 2948 if (adapter->tx_scrq) { 2949 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2950 if (!adapter->tx_scrq[i]) 2951 continue; 2952 2953 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2954 i); 2955 if (adapter->tx_scrq[i]->irq) { 2956 free_irq(adapter->tx_scrq[i]->irq, 2957 adapter->tx_scrq[i]); 2958 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2959 adapter->tx_scrq[i]->irq = 0; 2960 } 2961 2962 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2963 do_h_free); 2964 } 2965 2966 kfree(adapter->tx_scrq); 2967 adapter->tx_scrq = NULL; 2968 adapter->num_active_tx_scrqs = 0; 2969 } 2970 2971 if (adapter->rx_scrq) { 2972 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2973 if (!adapter->rx_scrq[i]) 2974 continue; 2975 2976 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2977 i); 2978 if (adapter->rx_scrq[i]->irq) { 2979 free_irq(adapter->rx_scrq[i]->irq, 2980 adapter->rx_scrq[i]); 2981 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2982 adapter->rx_scrq[i]->irq = 0; 2983 } 2984 2985 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2986 do_h_free); 2987 } 2988 2989 kfree(adapter->rx_scrq); 2990 adapter->rx_scrq = NULL; 2991 adapter->num_active_rx_scrqs = 0; 2992 } 2993 } 2994 2995 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2996 struct ibmvnic_sub_crq_queue *scrq) 2997 { 2998 struct device *dev = &adapter->vdev->dev; 2999 unsigned long rc; 3000 3001 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3002 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3003 if (rc) 3004 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3005 scrq->hw_irq, rc); 3006 return rc; 3007 } 3008 3009 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3010 struct ibmvnic_sub_crq_queue *scrq) 3011 { 3012 struct device *dev = &adapter->vdev->dev; 3013 unsigned long rc; 3014 3015 if (scrq->hw_irq > 0x100000000ULL) { 3016 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3017 return 1; 3018 } 3019 3020 if (test_bit(0, &adapter->resetting) && 3021 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3022 u64 val = (0xff000000) | scrq->hw_irq; 3023 3024 rc = plpar_hcall_norets(H_EOI, val); 3025 /* H_EOI would fail with rc = H_FUNCTION when running 3026 * in XIVE mode which is expected, but not an error. 3027 */ 3028 if (rc && (rc != H_FUNCTION)) 3029 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3030 val, rc); 3031 } 3032 3033 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3034 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3035 if (rc) 3036 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3037 scrq->hw_irq, rc); 3038 return rc; 3039 } 3040 3041 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3042 struct ibmvnic_sub_crq_queue *scrq) 3043 { 3044 struct device *dev = &adapter->vdev->dev; 3045 struct ibmvnic_tx_pool *tx_pool; 3046 struct ibmvnic_tx_buff *txbuff; 3047 union sub_crq *next; 3048 int index; 3049 int i, j; 3050 3051 restart_loop: 3052 while (pending_scrq(adapter, scrq)) { 3053 unsigned int pool = scrq->pool_index; 3054 int num_entries = 0; 3055 3056 next = ibmvnic_next_scrq(adapter, scrq); 3057 for (i = 0; i < next->tx_comp.num_comps; i++) { 3058 if (next->tx_comp.rcs[i]) { 3059 dev_err(dev, "tx error %x\n", 3060 next->tx_comp.rcs[i]); 3061 continue; 3062 } 3063 index = be32_to_cpu(next->tx_comp.correlators[i]); 3064 if (index & IBMVNIC_TSO_POOL_MASK) { 3065 tx_pool = &adapter->tso_pool[pool]; 3066 index &= ~IBMVNIC_TSO_POOL_MASK; 3067 } else { 3068 tx_pool = &adapter->tx_pool[pool]; 3069 } 3070 3071 txbuff = &tx_pool->tx_buff[index]; 3072 3073 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 3074 if (!txbuff->data_dma[j]) 3075 continue; 3076 3077 txbuff->data_dma[j] = 0; 3078 } 3079 3080 if (txbuff->last_frag) { 3081 dev_kfree_skb_any(txbuff->skb); 3082 txbuff->skb = NULL; 3083 } 3084 3085 num_entries += txbuff->num_entries; 3086 3087 tx_pool->free_map[tx_pool->producer_index] = index; 3088 tx_pool->producer_index = 3089 (tx_pool->producer_index + 1) % 3090 tx_pool->num_buffers; 3091 } 3092 /* remove tx_comp scrq*/ 3093 next->tx_comp.first = 0; 3094 3095 if (atomic_sub_return(num_entries, &scrq->used) <= 3096 (adapter->req_tx_entries_per_subcrq / 2) && 3097 __netif_subqueue_stopped(adapter->netdev, 3098 scrq->pool_index)) { 3099 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3100 netdev_dbg(adapter->netdev, "Started queue %d\n", 3101 scrq->pool_index); 3102 } 3103 } 3104 3105 enable_scrq_irq(adapter, scrq); 3106 3107 if (pending_scrq(adapter, scrq)) { 3108 disable_scrq_irq(adapter, scrq); 3109 goto restart_loop; 3110 } 3111 3112 return 0; 3113 } 3114 3115 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3116 { 3117 struct ibmvnic_sub_crq_queue *scrq = instance; 3118 struct ibmvnic_adapter *adapter = scrq->adapter; 3119 3120 disable_scrq_irq(adapter, scrq); 3121 ibmvnic_complete_tx(adapter, scrq); 3122 3123 return IRQ_HANDLED; 3124 } 3125 3126 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3127 { 3128 struct ibmvnic_sub_crq_queue *scrq = instance; 3129 struct ibmvnic_adapter *adapter = scrq->adapter; 3130 3131 /* When booting a kdump kernel we can hit pending interrupts 3132 * prior to completing driver initialization. 3133 */ 3134 if (unlikely(adapter->state != VNIC_OPEN)) 3135 return IRQ_NONE; 3136 3137 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3138 3139 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3140 disable_scrq_irq(adapter, scrq); 3141 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3142 } 3143 3144 return IRQ_HANDLED; 3145 } 3146 3147 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3148 { 3149 struct device *dev = &adapter->vdev->dev; 3150 struct ibmvnic_sub_crq_queue *scrq; 3151 int i = 0, j = 0; 3152 int rc = 0; 3153 3154 for (i = 0; i < adapter->req_tx_queues; i++) { 3155 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3156 i); 3157 scrq = adapter->tx_scrq[i]; 3158 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3159 3160 if (!scrq->irq) { 3161 rc = -EINVAL; 3162 dev_err(dev, "Error mapping irq\n"); 3163 goto req_tx_irq_failed; 3164 } 3165 3166 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3167 adapter->vdev->unit_address, i); 3168 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3169 0, scrq->name, scrq); 3170 3171 if (rc) { 3172 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3173 scrq->irq, rc); 3174 irq_dispose_mapping(scrq->irq); 3175 goto req_tx_irq_failed; 3176 } 3177 } 3178 3179 for (i = 0; i < adapter->req_rx_queues; i++) { 3180 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3181 i); 3182 scrq = adapter->rx_scrq[i]; 3183 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3184 if (!scrq->irq) { 3185 rc = -EINVAL; 3186 dev_err(dev, "Error mapping irq\n"); 3187 goto req_rx_irq_failed; 3188 } 3189 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3190 adapter->vdev->unit_address, i); 3191 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3192 0, scrq->name, scrq); 3193 if (rc) { 3194 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3195 scrq->irq, rc); 3196 irq_dispose_mapping(scrq->irq); 3197 goto req_rx_irq_failed; 3198 } 3199 } 3200 return rc; 3201 3202 req_rx_irq_failed: 3203 for (j = 0; j < i; j++) { 3204 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3205 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3206 } 3207 i = adapter->req_tx_queues; 3208 req_tx_irq_failed: 3209 for (j = 0; j < i; j++) { 3210 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3211 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3212 } 3213 release_sub_crqs(adapter, 1); 3214 return rc; 3215 } 3216 3217 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3218 { 3219 struct device *dev = &adapter->vdev->dev; 3220 struct ibmvnic_sub_crq_queue **allqueues; 3221 int registered_queues = 0; 3222 int total_queues; 3223 int more = 0; 3224 int i; 3225 3226 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3227 3228 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3229 if (!allqueues) 3230 return -1; 3231 3232 for (i = 0; i < total_queues; i++) { 3233 allqueues[i] = init_sub_crq_queue(adapter); 3234 if (!allqueues[i]) { 3235 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3236 break; 3237 } 3238 registered_queues++; 3239 } 3240 3241 /* Make sure we were able to register the minimum number of queues */ 3242 if (registered_queues < 3243 adapter->min_tx_queues + adapter->min_rx_queues) { 3244 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3245 goto tx_failed; 3246 } 3247 3248 /* Distribute the failed allocated queues*/ 3249 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3250 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3251 switch (i % 3) { 3252 case 0: 3253 if (adapter->req_rx_queues > adapter->min_rx_queues) 3254 adapter->req_rx_queues--; 3255 else 3256 more++; 3257 break; 3258 case 1: 3259 if (adapter->req_tx_queues > adapter->min_tx_queues) 3260 adapter->req_tx_queues--; 3261 else 3262 more++; 3263 break; 3264 } 3265 } 3266 3267 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3268 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3269 if (!adapter->tx_scrq) 3270 goto tx_failed; 3271 3272 for (i = 0; i < adapter->req_tx_queues; i++) { 3273 adapter->tx_scrq[i] = allqueues[i]; 3274 adapter->tx_scrq[i]->pool_index = i; 3275 adapter->num_active_tx_scrqs++; 3276 } 3277 3278 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3279 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3280 if (!adapter->rx_scrq) 3281 goto rx_failed; 3282 3283 for (i = 0; i < adapter->req_rx_queues; i++) { 3284 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3285 adapter->rx_scrq[i]->scrq_num = i; 3286 adapter->num_active_rx_scrqs++; 3287 } 3288 3289 kfree(allqueues); 3290 return 0; 3291 3292 rx_failed: 3293 kfree(adapter->tx_scrq); 3294 adapter->tx_scrq = NULL; 3295 tx_failed: 3296 for (i = 0; i < registered_queues; i++) 3297 release_sub_crq_queue(adapter, allqueues[i], 1); 3298 kfree(allqueues); 3299 return -1; 3300 } 3301 3302 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3303 { 3304 struct device *dev = &adapter->vdev->dev; 3305 union ibmvnic_crq crq; 3306 int max_entries; 3307 3308 if (!retry) { 3309 /* Sub-CRQ entries are 32 byte long */ 3310 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3311 3312 if (adapter->min_tx_entries_per_subcrq > entries_page || 3313 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3314 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3315 return; 3316 } 3317 3318 if (adapter->desired.mtu) 3319 adapter->req_mtu = adapter->desired.mtu; 3320 else 3321 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3322 3323 if (!adapter->desired.tx_entries) 3324 adapter->desired.tx_entries = 3325 adapter->max_tx_entries_per_subcrq; 3326 if (!adapter->desired.rx_entries) 3327 adapter->desired.rx_entries = 3328 adapter->max_rx_add_entries_per_subcrq; 3329 3330 max_entries = IBMVNIC_MAX_LTB_SIZE / 3331 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3332 3333 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3334 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3335 adapter->desired.tx_entries = max_entries; 3336 } 3337 3338 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3339 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3340 adapter->desired.rx_entries = max_entries; 3341 } 3342 3343 if (adapter->desired.tx_entries) 3344 adapter->req_tx_entries_per_subcrq = 3345 adapter->desired.tx_entries; 3346 else 3347 adapter->req_tx_entries_per_subcrq = 3348 adapter->max_tx_entries_per_subcrq; 3349 3350 if (adapter->desired.rx_entries) 3351 adapter->req_rx_add_entries_per_subcrq = 3352 adapter->desired.rx_entries; 3353 else 3354 adapter->req_rx_add_entries_per_subcrq = 3355 adapter->max_rx_add_entries_per_subcrq; 3356 3357 if (adapter->desired.tx_queues) 3358 adapter->req_tx_queues = 3359 adapter->desired.tx_queues; 3360 else 3361 adapter->req_tx_queues = 3362 adapter->opt_tx_comp_sub_queues; 3363 3364 if (adapter->desired.rx_queues) 3365 adapter->req_rx_queues = 3366 adapter->desired.rx_queues; 3367 else 3368 adapter->req_rx_queues = 3369 adapter->opt_rx_comp_queues; 3370 3371 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3372 } 3373 3374 memset(&crq, 0, sizeof(crq)); 3375 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3376 crq.request_capability.cmd = REQUEST_CAPABILITY; 3377 3378 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3379 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3380 atomic_inc(&adapter->running_cap_crqs); 3381 ibmvnic_send_crq(adapter, &crq); 3382 3383 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3384 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3385 atomic_inc(&adapter->running_cap_crqs); 3386 ibmvnic_send_crq(adapter, &crq); 3387 3388 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3389 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3390 atomic_inc(&adapter->running_cap_crqs); 3391 ibmvnic_send_crq(adapter, &crq); 3392 3393 crq.request_capability.capability = 3394 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3395 crq.request_capability.number = 3396 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3397 atomic_inc(&adapter->running_cap_crqs); 3398 ibmvnic_send_crq(adapter, &crq); 3399 3400 crq.request_capability.capability = 3401 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3402 crq.request_capability.number = 3403 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3404 atomic_inc(&adapter->running_cap_crqs); 3405 ibmvnic_send_crq(adapter, &crq); 3406 3407 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3408 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3409 atomic_inc(&adapter->running_cap_crqs); 3410 ibmvnic_send_crq(adapter, &crq); 3411 3412 if (adapter->netdev->flags & IFF_PROMISC) { 3413 if (adapter->promisc_supported) { 3414 crq.request_capability.capability = 3415 cpu_to_be16(PROMISC_REQUESTED); 3416 crq.request_capability.number = cpu_to_be64(1); 3417 atomic_inc(&adapter->running_cap_crqs); 3418 ibmvnic_send_crq(adapter, &crq); 3419 } 3420 } else { 3421 crq.request_capability.capability = 3422 cpu_to_be16(PROMISC_REQUESTED); 3423 crq.request_capability.number = cpu_to_be64(0); 3424 atomic_inc(&adapter->running_cap_crqs); 3425 ibmvnic_send_crq(adapter, &crq); 3426 } 3427 } 3428 3429 static int pending_scrq(struct ibmvnic_adapter *adapter, 3430 struct ibmvnic_sub_crq_queue *scrq) 3431 { 3432 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3433 3434 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3435 return 1; 3436 else 3437 return 0; 3438 } 3439 3440 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3441 struct ibmvnic_sub_crq_queue *scrq) 3442 { 3443 union sub_crq *entry; 3444 unsigned long flags; 3445 3446 spin_lock_irqsave(&scrq->lock, flags); 3447 entry = &scrq->msgs[scrq->cur]; 3448 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3449 if (++scrq->cur == scrq->size) 3450 scrq->cur = 0; 3451 } else { 3452 entry = NULL; 3453 } 3454 spin_unlock_irqrestore(&scrq->lock, flags); 3455 3456 return entry; 3457 } 3458 3459 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3460 { 3461 struct ibmvnic_crq_queue *queue = &adapter->crq; 3462 union ibmvnic_crq *crq; 3463 3464 crq = &queue->msgs[queue->cur]; 3465 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3466 if (++queue->cur == queue->size) 3467 queue->cur = 0; 3468 } else { 3469 crq = NULL; 3470 } 3471 3472 return crq; 3473 } 3474 3475 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3476 { 3477 switch (rc) { 3478 case H_PARAMETER: 3479 dev_warn_ratelimited(dev, 3480 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3481 func, rc); 3482 break; 3483 case H_CLOSED: 3484 dev_warn_ratelimited(dev, 3485 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3486 func, rc); 3487 break; 3488 default: 3489 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3490 break; 3491 } 3492 } 3493 3494 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3495 union sub_crq *sub_crq) 3496 { 3497 unsigned int ua = adapter->vdev->unit_address; 3498 struct device *dev = &adapter->vdev->dev; 3499 u64 *u64_crq = (u64 *)sub_crq; 3500 int rc; 3501 3502 netdev_dbg(adapter->netdev, 3503 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3504 (unsigned long int)cpu_to_be64(remote_handle), 3505 (unsigned long int)cpu_to_be64(u64_crq[0]), 3506 (unsigned long int)cpu_to_be64(u64_crq[1]), 3507 (unsigned long int)cpu_to_be64(u64_crq[2]), 3508 (unsigned long int)cpu_to_be64(u64_crq[3])); 3509 3510 /* Make sure the hypervisor sees the complete request */ 3511 mb(); 3512 3513 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3514 cpu_to_be64(remote_handle), 3515 cpu_to_be64(u64_crq[0]), 3516 cpu_to_be64(u64_crq[1]), 3517 cpu_to_be64(u64_crq[2]), 3518 cpu_to_be64(u64_crq[3])); 3519 3520 if (rc) 3521 print_subcrq_error(dev, rc, __func__); 3522 3523 return rc; 3524 } 3525 3526 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3527 u64 remote_handle, u64 ioba, u64 num_entries) 3528 { 3529 unsigned int ua = adapter->vdev->unit_address; 3530 struct device *dev = &adapter->vdev->dev; 3531 int rc; 3532 3533 /* Make sure the hypervisor sees the complete request */ 3534 mb(); 3535 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3536 cpu_to_be64(remote_handle), 3537 ioba, num_entries); 3538 3539 if (rc) 3540 print_subcrq_error(dev, rc, __func__); 3541 3542 return rc; 3543 } 3544 3545 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3546 union ibmvnic_crq *crq) 3547 { 3548 unsigned int ua = adapter->vdev->unit_address; 3549 struct device *dev = &adapter->vdev->dev; 3550 u64 *u64_crq = (u64 *)crq; 3551 int rc; 3552 3553 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3554 (unsigned long int)cpu_to_be64(u64_crq[0]), 3555 (unsigned long int)cpu_to_be64(u64_crq[1])); 3556 3557 if (!adapter->crq.active && 3558 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3559 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3560 return -EINVAL; 3561 } 3562 3563 /* Make sure the hypervisor sees the complete request */ 3564 mb(); 3565 3566 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3567 cpu_to_be64(u64_crq[0]), 3568 cpu_to_be64(u64_crq[1])); 3569 3570 if (rc) { 3571 if (rc == H_CLOSED) { 3572 dev_warn(dev, "CRQ Queue closed\n"); 3573 /* do not reset, report the fail, wait for passive init from server */ 3574 } 3575 3576 dev_warn(dev, "Send error (rc=%d)\n", rc); 3577 } 3578 3579 return rc; 3580 } 3581 3582 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3583 { 3584 struct device *dev = &adapter->vdev->dev; 3585 union ibmvnic_crq crq; 3586 int retries = 100; 3587 int rc; 3588 3589 memset(&crq, 0, sizeof(crq)); 3590 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3591 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3592 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3593 3594 do { 3595 rc = ibmvnic_send_crq(adapter, &crq); 3596 if (rc != H_CLOSED) 3597 break; 3598 retries--; 3599 msleep(50); 3600 3601 } while (retries > 0); 3602 3603 if (rc) { 3604 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3605 return rc; 3606 } 3607 3608 return 0; 3609 } 3610 3611 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3612 { 3613 union ibmvnic_crq crq; 3614 3615 memset(&crq, 0, sizeof(crq)); 3616 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3617 crq.version_exchange.cmd = VERSION_EXCHANGE; 3618 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3619 3620 return ibmvnic_send_crq(adapter, &crq); 3621 } 3622 3623 struct vnic_login_client_data { 3624 u8 type; 3625 __be16 len; 3626 char name[]; 3627 } __packed; 3628 3629 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3630 { 3631 int len; 3632 3633 /* Calculate the amount of buffer space needed for the 3634 * vnic client data in the login buffer. There are four entries, 3635 * OS name, LPAR name, device name, and a null last entry. 3636 */ 3637 len = 4 * sizeof(struct vnic_login_client_data); 3638 len += 6; /* "Linux" plus NULL */ 3639 len += strlen(utsname()->nodename) + 1; 3640 len += strlen(adapter->netdev->name) + 1; 3641 3642 return len; 3643 } 3644 3645 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3646 struct vnic_login_client_data *vlcd) 3647 { 3648 const char *os_name = "Linux"; 3649 int len; 3650 3651 /* Type 1 - LPAR OS */ 3652 vlcd->type = 1; 3653 len = strlen(os_name) + 1; 3654 vlcd->len = cpu_to_be16(len); 3655 strncpy(vlcd->name, os_name, len); 3656 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3657 3658 /* Type 2 - LPAR name */ 3659 vlcd->type = 2; 3660 len = strlen(utsname()->nodename) + 1; 3661 vlcd->len = cpu_to_be16(len); 3662 strncpy(vlcd->name, utsname()->nodename, len); 3663 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3664 3665 /* Type 3 - device name */ 3666 vlcd->type = 3; 3667 len = strlen(adapter->netdev->name) + 1; 3668 vlcd->len = cpu_to_be16(len); 3669 strncpy(vlcd->name, adapter->netdev->name, len); 3670 } 3671 3672 static int send_login(struct ibmvnic_adapter *adapter) 3673 { 3674 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3675 struct ibmvnic_login_buffer *login_buffer; 3676 struct device *dev = &adapter->vdev->dev; 3677 dma_addr_t rsp_buffer_token; 3678 dma_addr_t buffer_token; 3679 size_t rsp_buffer_size; 3680 union ibmvnic_crq crq; 3681 size_t buffer_size; 3682 __be64 *tx_list_p; 3683 __be64 *rx_list_p; 3684 int client_data_len; 3685 struct vnic_login_client_data *vlcd; 3686 int i; 3687 3688 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3689 netdev_err(adapter->netdev, 3690 "RX or TX queues are not allocated, device login failed\n"); 3691 return -1; 3692 } 3693 3694 release_login_rsp_buffer(adapter); 3695 client_data_len = vnic_client_data_len(adapter); 3696 3697 buffer_size = 3698 sizeof(struct ibmvnic_login_buffer) + 3699 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3700 client_data_len; 3701 3702 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3703 if (!login_buffer) 3704 goto buf_alloc_failed; 3705 3706 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3707 DMA_TO_DEVICE); 3708 if (dma_mapping_error(dev, buffer_token)) { 3709 dev_err(dev, "Couldn't map login buffer\n"); 3710 goto buf_map_failed; 3711 } 3712 3713 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3714 sizeof(u64) * adapter->req_tx_queues + 3715 sizeof(u64) * adapter->req_rx_queues + 3716 sizeof(u64) * adapter->req_rx_queues + 3717 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3718 3719 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3720 if (!login_rsp_buffer) 3721 goto buf_rsp_alloc_failed; 3722 3723 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3724 rsp_buffer_size, DMA_FROM_DEVICE); 3725 if (dma_mapping_error(dev, rsp_buffer_token)) { 3726 dev_err(dev, "Couldn't map login rsp buffer\n"); 3727 goto buf_rsp_map_failed; 3728 } 3729 3730 adapter->login_buf = login_buffer; 3731 adapter->login_buf_token = buffer_token; 3732 adapter->login_buf_sz = buffer_size; 3733 adapter->login_rsp_buf = login_rsp_buffer; 3734 adapter->login_rsp_buf_token = rsp_buffer_token; 3735 adapter->login_rsp_buf_sz = rsp_buffer_size; 3736 3737 login_buffer->len = cpu_to_be32(buffer_size); 3738 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3739 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3740 login_buffer->off_txcomp_subcrqs = 3741 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3742 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3743 login_buffer->off_rxcomp_subcrqs = 3744 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3745 sizeof(u64) * adapter->req_tx_queues); 3746 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3747 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3748 3749 tx_list_p = (__be64 *)((char *)login_buffer + 3750 sizeof(struct ibmvnic_login_buffer)); 3751 rx_list_p = (__be64 *)((char *)login_buffer + 3752 sizeof(struct ibmvnic_login_buffer) + 3753 sizeof(u64) * adapter->req_tx_queues); 3754 3755 for (i = 0; i < adapter->req_tx_queues; i++) { 3756 if (adapter->tx_scrq[i]) { 3757 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3758 crq_num); 3759 } 3760 } 3761 3762 for (i = 0; i < adapter->req_rx_queues; i++) { 3763 if (adapter->rx_scrq[i]) { 3764 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3765 crq_num); 3766 } 3767 } 3768 3769 /* Insert vNIC login client data */ 3770 vlcd = (struct vnic_login_client_data *) 3771 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3772 login_buffer->client_data_offset = 3773 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3774 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3775 3776 vnic_add_client_data(adapter, vlcd); 3777 3778 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3779 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3780 netdev_dbg(adapter->netdev, "%016lx\n", 3781 ((unsigned long int *)(adapter->login_buf))[i]); 3782 } 3783 3784 memset(&crq, 0, sizeof(crq)); 3785 crq.login.first = IBMVNIC_CRQ_CMD; 3786 crq.login.cmd = LOGIN; 3787 crq.login.ioba = cpu_to_be32(buffer_token); 3788 crq.login.len = cpu_to_be32(buffer_size); 3789 ibmvnic_send_crq(adapter, &crq); 3790 3791 return 0; 3792 3793 buf_rsp_map_failed: 3794 kfree(login_rsp_buffer); 3795 buf_rsp_alloc_failed: 3796 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3797 buf_map_failed: 3798 kfree(login_buffer); 3799 buf_alloc_failed: 3800 return -1; 3801 } 3802 3803 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3804 u32 len, u8 map_id) 3805 { 3806 union ibmvnic_crq crq; 3807 3808 memset(&crq, 0, sizeof(crq)); 3809 crq.request_map.first = IBMVNIC_CRQ_CMD; 3810 crq.request_map.cmd = REQUEST_MAP; 3811 crq.request_map.map_id = map_id; 3812 crq.request_map.ioba = cpu_to_be32(addr); 3813 crq.request_map.len = cpu_to_be32(len); 3814 return ibmvnic_send_crq(adapter, &crq); 3815 } 3816 3817 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3818 { 3819 union ibmvnic_crq crq; 3820 3821 memset(&crq, 0, sizeof(crq)); 3822 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3823 crq.request_unmap.cmd = REQUEST_UNMAP; 3824 crq.request_unmap.map_id = map_id; 3825 return ibmvnic_send_crq(adapter, &crq); 3826 } 3827 3828 static void send_query_map(struct ibmvnic_adapter *adapter) 3829 { 3830 union ibmvnic_crq crq; 3831 3832 memset(&crq, 0, sizeof(crq)); 3833 crq.query_map.first = IBMVNIC_CRQ_CMD; 3834 crq.query_map.cmd = QUERY_MAP; 3835 ibmvnic_send_crq(adapter, &crq); 3836 } 3837 3838 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3839 static void send_query_cap(struct ibmvnic_adapter *adapter) 3840 { 3841 union ibmvnic_crq crq; 3842 3843 atomic_set(&adapter->running_cap_crqs, 0); 3844 memset(&crq, 0, sizeof(crq)); 3845 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3846 crq.query_capability.cmd = QUERY_CAPABILITY; 3847 3848 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3849 atomic_inc(&adapter->running_cap_crqs); 3850 ibmvnic_send_crq(adapter, &crq); 3851 3852 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3853 atomic_inc(&adapter->running_cap_crqs); 3854 ibmvnic_send_crq(adapter, &crq); 3855 3856 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3857 atomic_inc(&adapter->running_cap_crqs); 3858 ibmvnic_send_crq(adapter, &crq); 3859 3860 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3861 atomic_inc(&adapter->running_cap_crqs); 3862 ibmvnic_send_crq(adapter, &crq); 3863 3864 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3865 atomic_inc(&adapter->running_cap_crqs); 3866 ibmvnic_send_crq(adapter, &crq); 3867 3868 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3869 atomic_inc(&adapter->running_cap_crqs); 3870 ibmvnic_send_crq(adapter, &crq); 3871 3872 crq.query_capability.capability = 3873 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3874 atomic_inc(&adapter->running_cap_crqs); 3875 ibmvnic_send_crq(adapter, &crq); 3876 3877 crq.query_capability.capability = 3878 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3879 atomic_inc(&adapter->running_cap_crqs); 3880 ibmvnic_send_crq(adapter, &crq); 3881 3882 crq.query_capability.capability = 3883 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3884 atomic_inc(&adapter->running_cap_crqs); 3885 ibmvnic_send_crq(adapter, &crq); 3886 3887 crq.query_capability.capability = 3888 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3889 atomic_inc(&adapter->running_cap_crqs); 3890 ibmvnic_send_crq(adapter, &crq); 3891 3892 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3893 atomic_inc(&adapter->running_cap_crqs); 3894 ibmvnic_send_crq(adapter, &crq); 3895 3896 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3897 atomic_inc(&adapter->running_cap_crqs); 3898 ibmvnic_send_crq(adapter, &crq); 3899 3900 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3901 atomic_inc(&adapter->running_cap_crqs); 3902 ibmvnic_send_crq(adapter, &crq); 3903 3904 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3905 atomic_inc(&adapter->running_cap_crqs); 3906 ibmvnic_send_crq(adapter, &crq); 3907 3908 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3909 atomic_inc(&adapter->running_cap_crqs); 3910 ibmvnic_send_crq(adapter, &crq); 3911 3912 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3913 atomic_inc(&adapter->running_cap_crqs); 3914 ibmvnic_send_crq(adapter, &crq); 3915 3916 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3917 atomic_inc(&adapter->running_cap_crqs); 3918 ibmvnic_send_crq(adapter, &crq); 3919 3920 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3921 atomic_inc(&adapter->running_cap_crqs); 3922 ibmvnic_send_crq(adapter, &crq); 3923 3924 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3925 atomic_inc(&adapter->running_cap_crqs); 3926 ibmvnic_send_crq(adapter, &crq); 3927 3928 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3929 atomic_inc(&adapter->running_cap_crqs); 3930 ibmvnic_send_crq(adapter, &crq); 3931 3932 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3933 atomic_inc(&adapter->running_cap_crqs); 3934 ibmvnic_send_crq(adapter, &crq); 3935 3936 crq.query_capability.capability = 3937 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3938 atomic_inc(&adapter->running_cap_crqs); 3939 ibmvnic_send_crq(adapter, &crq); 3940 3941 crq.query_capability.capability = 3942 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3943 atomic_inc(&adapter->running_cap_crqs); 3944 ibmvnic_send_crq(adapter, &crq); 3945 3946 crq.query_capability.capability = 3947 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3948 atomic_inc(&adapter->running_cap_crqs); 3949 ibmvnic_send_crq(adapter, &crq); 3950 3951 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3952 atomic_inc(&adapter->running_cap_crqs); 3953 ibmvnic_send_crq(adapter, &crq); 3954 } 3955 3956 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 3957 { 3958 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 3959 struct device *dev = &adapter->vdev->dev; 3960 union ibmvnic_crq crq; 3961 3962 adapter->ip_offload_tok = 3963 dma_map_single(dev, 3964 &adapter->ip_offload_buf, 3965 buf_sz, 3966 DMA_FROM_DEVICE); 3967 3968 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 3969 if (!firmware_has_feature(FW_FEATURE_CMO)) 3970 dev_err(dev, "Couldn't map offload buffer\n"); 3971 return; 3972 } 3973 3974 memset(&crq, 0, sizeof(crq)); 3975 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 3976 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 3977 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 3978 crq.query_ip_offload.ioba = 3979 cpu_to_be32(adapter->ip_offload_tok); 3980 3981 ibmvnic_send_crq(adapter, &crq); 3982 } 3983 3984 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 3985 { 3986 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 3987 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3988 struct device *dev = &adapter->vdev->dev; 3989 netdev_features_t old_hw_features = 0; 3990 union ibmvnic_crq crq; 3991 3992 adapter->ip_offload_ctrl_tok = 3993 dma_map_single(dev, 3994 ctrl_buf, 3995 sizeof(adapter->ip_offload_ctrl), 3996 DMA_TO_DEVICE); 3997 3998 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3999 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4000 return; 4001 } 4002 4003 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4004 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4005 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4006 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4007 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4008 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4009 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4010 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4011 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4012 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4013 4014 /* large_rx disabled for now, additional features needed */ 4015 ctrl_buf->large_rx_ipv4 = 0; 4016 ctrl_buf->large_rx_ipv6 = 0; 4017 4018 if (adapter->state != VNIC_PROBING) { 4019 old_hw_features = adapter->netdev->hw_features; 4020 adapter->netdev->hw_features = 0; 4021 } 4022 4023 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4024 4025 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4026 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4027 4028 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4029 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4030 4031 if ((adapter->netdev->features & 4032 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4033 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4034 4035 if (buf->large_tx_ipv4) 4036 adapter->netdev->hw_features |= NETIF_F_TSO; 4037 if (buf->large_tx_ipv6) 4038 adapter->netdev->hw_features |= NETIF_F_TSO6; 4039 4040 if (adapter->state == VNIC_PROBING) { 4041 adapter->netdev->features |= adapter->netdev->hw_features; 4042 } else if (old_hw_features != adapter->netdev->hw_features) { 4043 netdev_features_t tmp = 0; 4044 4045 /* disable features no longer supported */ 4046 adapter->netdev->features &= adapter->netdev->hw_features; 4047 /* turn on features now supported if previously enabled */ 4048 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4049 adapter->netdev->hw_features; 4050 adapter->netdev->features |= 4051 tmp & adapter->netdev->wanted_features; 4052 } 4053 4054 memset(&crq, 0, sizeof(crq)); 4055 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4056 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4057 crq.control_ip_offload.len = 4058 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4059 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4060 ibmvnic_send_crq(adapter, &crq); 4061 } 4062 4063 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4064 struct ibmvnic_adapter *adapter) 4065 { 4066 struct device *dev = &adapter->vdev->dev; 4067 4068 if (crq->get_vpd_size_rsp.rc.code) { 4069 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4070 crq->get_vpd_size_rsp.rc.code); 4071 complete(&adapter->fw_done); 4072 return; 4073 } 4074 4075 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4076 complete(&adapter->fw_done); 4077 } 4078 4079 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4080 struct ibmvnic_adapter *adapter) 4081 { 4082 struct device *dev = &adapter->vdev->dev; 4083 unsigned char *substr = NULL; 4084 u8 fw_level_len = 0; 4085 4086 memset(adapter->fw_version, 0, 32); 4087 4088 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4089 DMA_FROM_DEVICE); 4090 4091 if (crq->get_vpd_rsp.rc.code) { 4092 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4093 crq->get_vpd_rsp.rc.code); 4094 goto complete; 4095 } 4096 4097 /* get the position of the firmware version info 4098 * located after the ASCII 'RM' substring in the buffer 4099 */ 4100 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4101 if (!substr) { 4102 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4103 goto complete; 4104 } 4105 4106 /* get length of firmware level ASCII substring */ 4107 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4108 fw_level_len = *(substr + 2); 4109 } else { 4110 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4111 goto complete; 4112 } 4113 4114 /* copy firmware version string from vpd into adapter */ 4115 if ((substr + 3 + fw_level_len) < 4116 (adapter->vpd->buff + adapter->vpd->len)) { 4117 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4118 } else { 4119 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4120 } 4121 4122 complete: 4123 if (adapter->fw_version[0] == '\0') 4124 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4125 complete(&adapter->fw_done); 4126 } 4127 4128 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4129 { 4130 struct device *dev = &adapter->vdev->dev; 4131 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4132 int i; 4133 4134 dma_unmap_single(dev, adapter->ip_offload_tok, 4135 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4136 4137 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4138 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4139 netdev_dbg(adapter->netdev, "%016lx\n", 4140 ((unsigned long int *)(buf))[i]); 4141 4142 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4143 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4144 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4145 buf->tcp_ipv4_chksum); 4146 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4147 buf->tcp_ipv6_chksum); 4148 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4149 buf->udp_ipv4_chksum); 4150 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4151 buf->udp_ipv6_chksum); 4152 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4153 buf->large_tx_ipv4); 4154 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4155 buf->large_tx_ipv6); 4156 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4157 buf->large_rx_ipv4); 4158 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4159 buf->large_rx_ipv6); 4160 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4161 buf->max_ipv4_header_size); 4162 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4163 buf->max_ipv6_header_size); 4164 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4165 buf->max_tcp_header_size); 4166 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4167 buf->max_udp_header_size); 4168 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4169 buf->max_large_tx_size); 4170 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4171 buf->max_large_rx_size); 4172 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4173 buf->ipv6_extension_header); 4174 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4175 buf->tcp_pseudosum_req); 4176 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4177 buf->num_ipv6_ext_headers); 4178 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4179 buf->off_ipv6_ext_headers); 4180 4181 send_control_ip_offload(adapter); 4182 } 4183 4184 static const char *ibmvnic_fw_err_cause(u16 cause) 4185 { 4186 switch (cause) { 4187 case ADAPTER_PROBLEM: 4188 return "adapter problem"; 4189 case BUS_PROBLEM: 4190 return "bus problem"; 4191 case FW_PROBLEM: 4192 return "firmware problem"; 4193 case DD_PROBLEM: 4194 return "device driver problem"; 4195 case EEH_RECOVERY: 4196 return "EEH recovery"; 4197 case FW_UPDATED: 4198 return "firmware updated"; 4199 case LOW_MEMORY: 4200 return "low Memory"; 4201 default: 4202 return "unknown"; 4203 } 4204 } 4205 4206 static void handle_error_indication(union ibmvnic_crq *crq, 4207 struct ibmvnic_adapter *adapter) 4208 { 4209 struct device *dev = &adapter->vdev->dev; 4210 u16 cause; 4211 4212 cause = be16_to_cpu(crq->error_indication.error_cause); 4213 4214 dev_warn_ratelimited(dev, 4215 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4216 crq->error_indication.flags 4217 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4218 ibmvnic_fw_err_cause(cause)); 4219 4220 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4221 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4222 else 4223 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4224 } 4225 4226 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4227 struct ibmvnic_adapter *adapter) 4228 { 4229 struct net_device *netdev = adapter->netdev; 4230 struct device *dev = &adapter->vdev->dev; 4231 long rc; 4232 4233 rc = crq->change_mac_addr_rsp.rc.code; 4234 if (rc) { 4235 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4236 goto out; 4237 } 4238 ether_addr_copy(netdev->dev_addr, 4239 &crq->change_mac_addr_rsp.mac_addr[0]); 4240 out: 4241 complete(&adapter->fw_done); 4242 return rc; 4243 } 4244 4245 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4246 struct ibmvnic_adapter *adapter) 4247 { 4248 struct device *dev = &adapter->vdev->dev; 4249 u64 *req_value; 4250 char *name; 4251 4252 atomic_dec(&adapter->running_cap_crqs); 4253 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4254 case REQ_TX_QUEUES: 4255 req_value = &adapter->req_tx_queues; 4256 name = "tx"; 4257 break; 4258 case REQ_RX_QUEUES: 4259 req_value = &adapter->req_rx_queues; 4260 name = "rx"; 4261 break; 4262 case REQ_RX_ADD_QUEUES: 4263 req_value = &adapter->req_rx_add_queues; 4264 name = "rx_add"; 4265 break; 4266 case REQ_TX_ENTRIES_PER_SUBCRQ: 4267 req_value = &adapter->req_tx_entries_per_subcrq; 4268 name = "tx_entries_per_subcrq"; 4269 break; 4270 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4271 req_value = &adapter->req_rx_add_entries_per_subcrq; 4272 name = "rx_add_entries_per_subcrq"; 4273 break; 4274 case REQ_MTU: 4275 req_value = &adapter->req_mtu; 4276 name = "mtu"; 4277 break; 4278 case PROMISC_REQUESTED: 4279 req_value = &adapter->promisc; 4280 name = "promisc"; 4281 break; 4282 default: 4283 dev_err(dev, "Got invalid cap request rsp %d\n", 4284 crq->request_capability.capability); 4285 return; 4286 } 4287 4288 switch (crq->request_capability_rsp.rc.code) { 4289 case SUCCESS: 4290 break; 4291 case PARTIALSUCCESS: 4292 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4293 *req_value, 4294 (long int)be64_to_cpu(crq->request_capability_rsp. 4295 number), name); 4296 4297 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4298 REQ_MTU) { 4299 pr_err("mtu of %llu is not supported. Reverting.\n", 4300 *req_value); 4301 *req_value = adapter->fallback.mtu; 4302 } else { 4303 *req_value = 4304 be64_to_cpu(crq->request_capability_rsp.number); 4305 } 4306 4307 send_request_cap(adapter, 1); 4308 return; 4309 default: 4310 dev_err(dev, "Error %d in request cap rsp\n", 4311 crq->request_capability_rsp.rc.code); 4312 return; 4313 } 4314 4315 /* Done receiving requested capabilities, query IP offload support */ 4316 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4317 adapter->wait_capability = false; 4318 send_query_ip_offload(adapter); 4319 } 4320 } 4321 4322 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4323 struct ibmvnic_adapter *adapter) 4324 { 4325 struct device *dev = &adapter->vdev->dev; 4326 struct net_device *netdev = adapter->netdev; 4327 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4328 struct ibmvnic_login_buffer *login = adapter->login_buf; 4329 u64 *tx_handle_array; 4330 u64 *rx_handle_array; 4331 int num_tx_pools; 4332 int num_rx_pools; 4333 u64 *size_array; 4334 int i; 4335 4336 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4337 DMA_TO_DEVICE); 4338 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4339 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4340 4341 /* If the number of queues requested can't be allocated by the 4342 * server, the login response will return with code 1. We will need 4343 * to resend the login buffer with fewer queues requested. 4344 */ 4345 if (login_rsp_crq->generic.rc.code) { 4346 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4347 complete(&adapter->init_done); 4348 return 0; 4349 } 4350 4351 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4352 4353 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4354 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4355 netdev_dbg(adapter->netdev, "%016lx\n", 4356 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4357 } 4358 4359 /* Sanity checks */ 4360 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4361 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4362 adapter->req_rx_add_queues != 4363 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4364 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4365 ibmvnic_remove(adapter->vdev); 4366 return -EIO; 4367 } 4368 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4369 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4370 /* variable buffer sizes are not supported, so just read the 4371 * first entry. 4372 */ 4373 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4374 4375 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4376 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4377 4378 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4379 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4380 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4381 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4382 4383 for (i = 0; i < num_tx_pools; i++) 4384 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4385 4386 for (i = 0; i < num_rx_pools; i++) 4387 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4388 4389 adapter->num_active_tx_scrqs = num_tx_pools; 4390 adapter->num_active_rx_scrqs = num_rx_pools; 4391 release_login_rsp_buffer(adapter); 4392 release_login_buffer(adapter); 4393 complete(&adapter->init_done); 4394 4395 return 0; 4396 } 4397 4398 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4399 struct ibmvnic_adapter *adapter) 4400 { 4401 struct device *dev = &adapter->vdev->dev; 4402 long rc; 4403 4404 rc = crq->request_unmap_rsp.rc.code; 4405 if (rc) 4406 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4407 } 4408 4409 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4410 struct ibmvnic_adapter *adapter) 4411 { 4412 struct net_device *netdev = adapter->netdev; 4413 struct device *dev = &adapter->vdev->dev; 4414 long rc; 4415 4416 rc = crq->query_map_rsp.rc.code; 4417 if (rc) { 4418 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4419 return; 4420 } 4421 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4422 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4423 crq->query_map_rsp.free_pages); 4424 } 4425 4426 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4427 struct ibmvnic_adapter *adapter) 4428 { 4429 struct net_device *netdev = adapter->netdev; 4430 struct device *dev = &adapter->vdev->dev; 4431 long rc; 4432 4433 atomic_dec(&adapter->running_cap_crqs); 4434 netdev_dbg(netdev, "Outstanding queries: %d\n", 4435 atomic_read(&adapter->running_cap_crqs)); 4436 rc = crq->query_capability.rc.code; 4437 if (rc) { 4438 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4439 goto out; 4440 } 4441 4442 switch (be16_to_cpu(crq->query_capability.capability)) { 4443 case MIN_TX_QUEUES: 4444 adapter->min_tx_queues = 4445 be64_to_cpu(crq->query_capability.number); 4446 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4447 adapter->min_tx_queues); 4448 break; 4449 case MIN_RX_QUEUES: 4450 adapter->min_rx_queues = 4451 be64_to_cpu(crq->query_capability.number); 4452 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4453 adapter->min_rx_queues); 4454 break; 4455 case MIN_RX_ADD_QUEUES: 4456 adapter->min_rx_add_queues = 4457 be64_to_cpu(crq->query_capability.number); 4458 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4459 adapter->min_rx_add_queues); 4460 break; 4461 case MAX_TX_QUEUES: 4462 adapter->max_tx_queues = 4463 be64_to_cpu(crq->query_capability.number); 4464 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4465 adapter->max_tx_queues); 4466 break; 4467 case MAX_RX_QUEUES: 4468 adapter->max_rx_queues = 4469 be64_to_cpu(crq->query_capability.number); 4470 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4471 adapter->max_rx_queues); 4472 break; 4473 case MAX_RX_ADD_QUEUES: 4474 adapter->max_rx_add_queues = 4475 be64_to_cpu(crq->query_capability.number); 4476 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4477 adapter->max_rx_add_queues); 4478 break; 4479 case MIN_TX_ENTRIES_PER_SUBCRQ: 4480 adapter->min_tx_entries_per_subcrq = 4481 be64_to_cpu(crq->query_capability.number); 4482 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4483 adapter->min_tx_entries_per_subcrq); 4484 break; 4485 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4486 adapter->min_rx_add_entries_per_subcrq = 4487 be64_to_cpu(crq->query_capability.number); 4488 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4489 adapter->min_rx_add_entries_per_subcrq); 4490 break; 4491 case MAX_TX_ENTRIES_PER_SUBCRQ: 4492 adapter->max_tx_entries_per_subcrq = 4493 be64_to_cpu(crq->query_capability.number); 4494 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4495 adapter->max_tx_entries_per_subcrq); 4496 break; 4497 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4498 adapter->max_rx_add_entries_per_subcrq = 4499 be64_to_cpu(crq->query_capability.number); 4500 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4501 adapter->max_rx_add_entries_per_subcrq); 4502 break; 4503 case TCP_IP_OFFLOAD: 4504 adapter->tcp_ip_offload = 4505 be64_to_cpu(crq->query_capability.number); 4506 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4507 adapter->tcp_ip_offload); 4508 break; 4509 case PROMISC_SUPPORTED: 4510 adapter->promisc_supported = 4511 be64_to_cpu(crq->query_capability.number); 4512 netdev_dbg(netdev, "promisc_supported = %lld\n", 4513 adapter->promisc_supported); 4514 break; 4515 case MIN_MTU: 4516 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4517 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4518 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4519 break; 4520 case MAX_MTU: 4521 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4522 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4523 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4524 break; 4525 case MAX_MULTICAST_FILTERS: 4526 adapter->max_multicast_filters = 4527 be64_to_cpu(crq->query_capability.number); 4528 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4529 adapter->max_multicast_filters); 4530 break; 4531 case VLAN_HEADER_INSERTION: 4532 adapter->vlan_header_insertion = 4533 be64_to_cpu(crq->query_capability.number); 4534 if (adapter->vlan_header_insertion) 4535 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4536 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4537 adapter->vlan_header_insertion); 4538 break; 4539 case RX_VLAN_HEADER_INSERTION: 4540 adapter->rx_vlan_header_insertion = 4541 be64_to_cpu(crq->query_capability.number); 4542 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4543 adapter->rx_vlan_header_insertion); 4544 break; 4545 case MAX_TX_SG_ENTRIES: 4546 adapter->max_tx_sg_entries = 4547 be64_to_cpu(crq->query_capability.number); 4548 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4549 adapter->max_tx_sg_entries); 4550 break; 4551 case RX_SG_SUPPORTED: 4552 adapter->rx_sg_supported = 4553 be64_to_cpu(crq->query_capability.number); 4554 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4555 adapter->rx_sg_supported); 4556 break; 4557 case OPT_TX_COMP_SUB_QUEUES: 4558 adapter->opt_tx_comp_sub_queues = 4559 be64_to_cpu(crq->query_capability.number); 4560 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4561 adapter->opt_tx_comp_sub_queues); 4562 break; 4563 case OPT_RX_COMP_QUEUES: 4564 adapter->opt_rx_comp_queues = 4565 be64_to_cpu(crq->query_capability.number); 4566 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4567 adapter->opt_rx_comp_queues); 4568 break; 4569 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4570 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4571 be64_to_cpu(crq->query_capability.number); 4572 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4573 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4574 break; 4575 case OPT_TX_ENTRIES_PER_SUBCRQ: 4576 adapter->opt_tx_entries_per_subcrq = 4577 be64_to_cpu(crq->query_capability.number); 4578 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4579 adapter->opt_tx_entries_per_subcrq); 4580 break; 4581 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4582 adapter->opt_rxba_entries_per_subcrq = 4583 be64_to_cpu(crq->query_capability.number); 4584 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4585 adapter->opt_rxba_entries_per_subcrq); 4586 break; 4587 case TX_RX_DESC_REQ: 4588 adapter->tx_rx_desc_req = crq->query_capability.number; 4589 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4590 adapter->tx_rx_desc_req); 4591 break; 4592 4593 default: 4594 netdev_err(netdev, "Got invalid cap rsp %d\n", 4595 crq->query_capability.capability); 4596 } 4597 4598 out: 4599 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4600 adapter->wait_capability = false; 4601 send_request_cap(adapter, 0); 4602 } 4603 } 4604 4605 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4606 { 4607 union ibmvnic_crq crq; 4608 int rc; 4609 4610 memset(&crq, 0, sizeof(crq)); 4611 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4612 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4613 4614 mutex_lock(&adapter->fw_lock); 4615 adapter->fw_done_rc = 0; 4616 reinit_completion(&adapter->fw_done); 4617 4618 rc = ibmvnic_send_crq(adapter, &crq); 4619 if (rc) { 4620 mutex_unlock(&adapter->fw_lock); 4621 return rc; 4622 } 4623 4624 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4625 if (rc) { 4626 mutex_unlock(&adapter->fw_lock); 4627 return rc; 4628 } 4629 4630 mutex_unlock(&adapter->fw_lock); 4631 return adapter->fw_done_rc ? -EIO : 0; 4632 } 4633 4634 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4635 struct ibmvnic_adapter *adapter) 4636 { 4637 struct net_device *netdev = adapter->netdev; 4638 int rc; 4639 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4640 4641 rc = crq->query_phys_parms_rsp.rc.code; 4642 if (rc) { 4643 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4644 return rc; 4645 } 4646 switch (rspeed) { 4647 case IBMVNIC_10MBPS: 4648 adapter->speed = SPEED_10; 4649 break; 4650 case IBMVNIC_100MBPS: 4651 adapter->speed = SPEED_100; 4652 break; 4653 case IBMVNIC_1GBPS: 4654 adapter->speed = SPEED_1000; 4655 break; 4656 case IBMVNIC_10GBPS: 4657 adapter->speed = SPEED_10000; 4658 break; 4659 case IBMVNIC_25GBPS: 4660 adapter->speed = SPEED_25000; 4661 break; 4662 case IBMVNIC_40GBPS: 4663 adapter->speed = SPEED_40000; 4664 break; 4665 case IBMVNIC_50GBPS: 4666 adapter->speed = SPEED_50000; 4667 break; 4668 case IBMVNIC_100GBPS: 4669 adapter->speed = SPEED_100000; 4670 break; 4671 case IBMVNIC_200GBPS: 4672 adapter->speed = SPEED_200000; 4673 break; 4674 default: 4675 if (netif_carrier_ok(netdev)) 4676 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4677 adapter->speed = SPEED_UNKNOWN; 4678 } 4679 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4680 adapter->duplex = DUPLEX_FULL; 4681 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4682 adapter->duplex = DUPLEX_HALF; 4683 else 4684 adapter->duplex = DUPLEX_UNKNOWN; 4685 4686 return rc; 4687 } 4688 4689 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4690 struct ibmvnic_adapter *adapter) 4691 { 4692 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4693 struct net_device *netdev = adapter->netdev; 4694 struct device *dev = &adapter->vdev->dev; 4695 u64 *u64_crq = (u64 *)crq; 4696 long rc; 4697 4698 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4699 (unsigned long int)cpu_to_be64(u64_crq[0]), 4700 (unsigned long int)cpu_to_be64(u64_crq[1])); 4701 switch (gen_crq->first) { 4702 case IBMVNIC_CRQ_INIT_RSP: 4703 switch (gen_crq->cmd) { 4704 case IBMVNIC_CRQ_INIT: 4705 dev_info(dev, "Partner initialized\n"); 4706 adapter->from_passive_init = true; 4707 adapter->failover_pending = false; 4708 if (!completion_done(&adapter->init_done)) { 4709 complete(&adapter->init_done); 4710 adapter->init_done_rc = -EIO; 4711 } 4712 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4713 break; 4714 case IBMVNIC_CRQ_INIT_COMPLETE: 4715 dev_info(dev, "Partner initialization complete\n"); 4716 adapter->crq.active = true; 4717 send_version_xchg(adapter); 4718 break; 4719 default: 4720 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4721 } 4722 return; 4723 case IBMVNIC_CRQ_XPORT_EVENT: 4724 netif_carrier_off(netdev); 4725 adapter->crq.active = false; 4726 /* terminate any thread waiting for a response 4727 * from the device 4728 */ 4729 if (!completion_done(&adapter->fw_done)) { 4730 adapter->fw_done_rc = -EIO; 4731 complete(&adapter->fw_done); 4732 } 4733 if (!completion_done(&adapter->stats_done)) 4734 complete(&adapter->stats_done); 4735 if (test_bit(0, &adapter->resetting)) 4736 adapter->force_reset_recovery = true; 4737 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4738 dev_info(dev, "Migrated, re-enabling adapter\n"); 4739 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4740 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4741 dev_info(dev, "Backing device failover detected\n"); 4742 adapter->failover_pending = true; 4743 } else { 4744 /* The adapter lost the connection */ 4745 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4746 gen_crq->cmd); 4747 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4748 } 4749 return; 4750 case IBMVNIC_CRQ_CMD_RSP: 4751 break; 4752 default: 4753 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4754 gen_crq->first); 4755 return; 4756 } 4757 4758 switch (gen_crq->cmd) { 4759 case VERSION_EXCHANGE_RSP: 4760 rc = crq->version_exchange_rsp.rc.code; 4761 if (rc) { 4762 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4763 break; 4764 } 4765 ibmvnic_version = 4766 be16_to_cpu(crq->version_exchange_rsp.version); 4767 dev_info(dev, "Partner protocol version is %d\n", 4768 ibmvnic_version); 4769 send_query_cap(adapter); 4770 break; 4771 case QUERY_CAPABILITY_RSP: 4772 handle_query_cap_rsp(crq, adapter); 4773 break; 4774 case QUERY_MAP_RSP: 4775 handle_query_map_rsp(crq, adapter); 4776 break; 4777 case REQUEST_MAP_RSP: 4778 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4779 complete(&adapter->fw_done); 4780 break; 4781 case REQUEST_UNMAP_RSP: 4782 handle_request_unmap_rsp(crq, adapter); 4783 break; 4784 case REQUEST_CAPABILITY_RSP: 4785 handle_request_cap_rsp(crq, adapter); 4786 break; 4787 case LOGIN_RSP: 4788 netdev_dbg(netdev, "Got Login Response\n"); 4789 handle_login_rsp(crq, adapter); 4790 break; 4791 case LOGICAL_LINK_STATE_RSP: 4792 netdev_dbg(netdev, 4793 "Got Logical Link State Response, state: %d rc: %d\n", 4794 crq->logical_link_state_rsp.link_state, 4795 crq->logical_link_state_rsp.rc.code); 4796 adapter->logical_link_state = 4797 crq->logical_link_state_rsp.link_state; 4798 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4799 complete(&adapter->init_done); 4800 break; 4801 case LINK_STATE_INDICATION: 4802 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4803 adapter->phys_link_state = 4804 crq->link_state_indication.phys_link_state; 4805 adapter->logical_link_state = 4806 crq->link_state_indication.logical_link_state; 4807 if (adapter->phys_link_state && adapter->logical_link_state) 4808 netif_carrier_on(netdev); 4809 else 4810 netif_carrier_off(netdev); 4811 break; 4812 case CHANGE_MAC_ADDR_RSP: 4813 netdev_dbg(netdev, "Got MAC address change Response\n"); 4814 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4815 break; 4816 case ERROR_INDICATION: 4817 netdev_dbg(netdev, "Got Error Indication\n"); 4818 handle_error_indication(crq, adapter); 4819 break; 4820 case REQUEST_STATISTICS_RSP: 4821 netdev_dbg(netdev, "Got Statistics Response\n"); 4822 complete(&adapter->stats_done); 4823 break; 4824 case QUERY_IP_OFFLOAD_RSP: 4825 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4826 handle_query_ip_offload_rsp(adapter); 4827 break; 4828 case MULTICAST_CTRL_RSP: 4829 netdev_dbg(netdev, "Got multicast control Response\n"); 4830 break; 4831 case CONTROL_IP_OFFLOAD_RSP: 4832 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4833 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4834 sizeof(adapter->ip_offload_ctrl), 4835 DMA_TO_DEVICE); 4836 complete(&adapter->init_done); 4837 break; 4838 case COLLECT_FW_TRACE_RSP: 4839 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4840 complete(&adapter->fw_done); 4841 break; 4842 case GET_VPD_SIZE_RSP: 4843 handle_vpd_size_rsp(crq, adapter); 4844 break; 4845 case GET_VPD_RSP: 4846 handle_vpd_rsp(crq, adapter); 4847 break; 4848 case QUERY_PHYS_PARMS_RSP: 4849 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4850 complete(&adapter->fw_done); 4851 break; 4852 default: 4853 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4854 gen_crq->cmd); 4855 } 4856 } 4857 4858 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4859 { 4860 struct ibmvnic_adapter *adapter = instance; 4861 4862 tasklet_schedule(&adapter->tasklet); 4863 return IRQ_HANDLED; 4864 } 4865 4866 static void ibmvnic_tasklet(struct tasklet_struct *t) 4867 { 4868 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 4869 struct ibmvnic_crq_queue *queue = &adapter->crq; 4870 union ibmvnic_crq *crq; 4871 unsigned long flags; 4872 bool done = false; 4873 4874 spin_lock_irqsave(&queue->lock, flags); 4875 while (!done) { 4876 /* Pull all the valid messages off the CRQ */ 4877 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4878 ibmvnic_handle_crq(crq, adapter); 4879 crq->generic.first = 0; 4880 } 4881 4882 /* remain in tasklet until all 4883 * capabilities responses are received 4884 */ 4885 if (!adapter->wait_capability) 4886 done = true; 4887 } 4888 /* if capabilities CRQ's were sent in this tasklet, the following 4889 * tasklet must wait until all responses are received 4890 */ 4891 if (atomic_read(&adapter->running_cap_crqs) != 0) 4892 adapter->wait_capability = true; 4893 spin_unlock_irqrestore(&queue->lock, flags); 4894 } 4895 4896 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4897 { 4898 struct vio_dev *vdev = adapter->vdev; 4899 int rc; 4900 4901 do { 4902 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4903 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4904 4905 if (rc) 4906 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4907 4908 return rc; 4909 } 4910 4911 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4912 { 4913 struct ibmvnic_crq_queue *crq = &adapter->crq; 4914 struct device *dev = &adapter->vdev->dev; 4915 struct vio_dev *vdev = adapter->vdev; 4916 int rc; 4917 4918 /* Close the CRQ */ 4919 do { 4920 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4921 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4922 4923 /* Clean out the queue */ 4924 memset(crq->msgs, 0, PAGE_SIZE); 4925 crq->cur = 0; 4926 crq->active = false; 4927 4928 /* And re-open it again */ 4929 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4930 crq->msg_token, PAGE_SIZE); 4931 4932 if (rc == H_CLOSED) 4933 /* Adapter is good, but other end is not ready */ 4934 dev_warn(dev, "Partner adapter not ready\n"); 4935 else if (rc != 0) 4936 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4937 4938 return rc; 4939 } 4940 4941 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4942 { 4943 struct ibmvnic_crq_queue *crq = &adapter->crq; 4944 struct vio_dev *vdev = adapter->vdev; 4945 long rc; 4946 4947 if (!crq->msgs) 4948 return; 4949 4950 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4951 free_irq(vdev->irq, adapter); 4952 tasklet_kill(&adapter->tasklet); 4953 do { 4954 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4955 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4956 4957 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4958 DMA_BIDIRECTIONAL); 4959 free_page((unsigned long)crq->msgs); 4960 crq->msgs = NULL; 4961 crq->active = false; 4962 } 4963 4964 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4965 { 4966 struct ibmvnic_crq_queue *crq = &adapter->crq; 4967 struct device *dev = &adapter->vdev->dev; 4968 struct vio_dev *vdev = adapter->vdev; 4969 int rc, retrc = -ENOMEM; 4970 4971 if (crq->msgs) 4972 return 0; 4973 4974 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4975 /* Should we allocate more than one page? */ 4976 4977 if (!crq->msgs) 4978 return -ENOMEM; 4979 4980 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4981 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4982 DMA_BIDIRECTIONAL); 4983 if (dma_mapping_error(dev, crq->msg_token)) 4984 goto map_failed; 4985 4986 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4987 crq->msg_token, PAGE_SIZE); 4988 4989 if (rc == H_RESOURCE) 4990 /* maybe kexecing and resource is busy. try a reset */ 4991 rc = ibmvnic_reset_crq(adapter); 4992 retrc = rc; 4993 4994 if (rc == H_CLOSED) { 4995 dev_warn(dev, "Partner adapter not ready\n"); 4996 } else if (rc) { 4997 dev_warn(dev, "Error %d opening adapter\n", rc); 4998 goto reg_crq_failed; 4999 } 5000 5001 retrc = 0; 5002 5003 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5004 5005 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5006 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5007 adapter->vdev->unit_address); 5008 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5009 if (rc) { 5010 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5011 vdev->irq, rc); 5012 goto req_irq_failed; 5013 } 5014 5015 rc = vio_enable_interrupts(vdev); 5016 if (rc) { 5017 dev_err(dev, "Error %d enabling interrupts\n", rc); 5018 goto req_irq_failed; 5019 } 5020 5021 crq->cur = 0; 5022 spin_lock_init(&crq->lock); 5023 5024 return retrc; 5025 5026 req_irq_failed: 5027 tasklet_kill(&adapter->tasklet); 5028 do { 5029 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5030 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5031 reg_crq_failed: 5032 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5033 map_failed: 5034 free_page((unsigned long)crq->msgs); 5035 crq->msgs = NULL; 5036 return retrc; 5037 } 5038 5039 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5040 { 5041 struct device *dev = &adapter->vdev->dev; 5042 unsigned long timeout = msecs_to_jiffies(30000); 5043 u64 old_num_rx_queues, old_num_tx_queues; 5044 int rc; 5045 5046 adapter->from_passive_init = false; 5047 5048 if (reset) { 5049 old_num_rx_queues = adapter->req_rx_queues; 5050 old_num_tx_queues = adapter->req_tx_queues; 5051 reinit_completion(&adapter->init_done); 5052 } 5053 5054 adapter->init_done_rc = 0; 5055 rc = ibmvnic_send_crq_init(adapter); 5056 if (rc) { 5057 dev_err(dev, "Send crq init failed with error %d\n", rc); 5058 return rc; 5059 } 5060 5061 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5062 dev_err(dev, "Initialization sequence timed out\n"); 5063 return -1; 5064 } 5065 5066 if (adapter->init_done_rc) { 5067 release_crq_queue(adapter); 5068 return adapter->init_done_rc; 5069 } 5070 5071 if (adapter->from_passive_init) { 5072 adapter->state = VNIC_OPEN; 5073 adapter->from_passive_init = false; 5074 return -1; 5075 } 5076 5077 if (reset && 5078 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5079 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5080 if (adapter->req_rx_queues != old_num_rx_queues || 5081 adapter->req_tx_queues != old_num_tx_queues) { 5082 release_sub_crqs(adapter, 0); 5083 rc = init_sub_crqs(adapter); 5084 } else { 5085 rc = reset_sub_crq_queues(adapter); 5086 } 5087 } else { 5088 rc = init_sub_crqs(adapter); 5089 } 5090 5091 if (rc) { 5092 dev_err(dev, "Initialization of sub crqs failed\n"); 5093 release_crq_queue(adapter); 5094 return rc; 5095 } 5096 5097 rc = init_sub_crq_irqs(adapter); 5098 if (rc) { 5099 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5100 release_crq_queue(adapter); 5101 } 5102 5103 return rc; 5104 } 5105 5106 static struct device_attribute dev_attr_failover; 5107 5108 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5109 { 5110 struct ibmvnic_adapter *adapter; 5111 struct net_device *netdev; 5112 unsigned char *mac_addr_p; 5113 int rc; 5114 5115 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5116 dev->unit_address); 5117 5118 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5119 VETH_MAC_ADDR, NULL); 5120 if (!mac_addr_p) { 5121 dev_err(&dev->dev, 5122 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5123 __FILE__, __LINE__); 5124 return 0; 5125 } 5126 5127 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5128 IBMVNIC_MAX_QUEUES); 5129 if (!netdev) 5130 return -ENOMEM; 5131 5132 adapter = netdev_priv(netdev); 5133 adapter->state = VNIC_PROBING; 5134 dev_set_drvdata(&dev->dev, netdev); 5135 adapter->vdev = dev; 5136 adapter->netdev = netdev; 5137 5138 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5139 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5140 netdev->irq = dev->irq; 5141 netdev->netdev_ops = &ibmvnic_netdev_ops; 5142 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5143 SET_NETDEV_DEV(netdev, &dev->dev); 5144 5145 spin_lock_init(&adapter->stats_lock); 5146 5147 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5148 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5149 __ibmvnic_delayed_reset); 5150 INIT_LIST_HEAD(&adapter->rwi_list); 5151 spin_lock_init(&adapter->rwi_lock); 5152 spin_lock_init(&adapter->state_lock); 5153 mutex_init(&adapter->fw_lock); 5154 init_completion(&adapter->init_done); 5155 init_completion(&adapter->fw_done); 5156 init_completion(&adapter->reset_done); 5157 init_completion(&adapter->stats_done); 5158 clear_bit(0, &adapter->resetting); 5159 5160 do { 5161 rc = init_crq_queue(adapter); 5162 if (rc) { 5163 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5164 rc); 5165 goto ibmvnic_init_fail; 5166 } 5167 5168 rc = ibmvnic_reset_init(adapter, false); 5169 if (rc && rc != EAGAIN) 5170 goto ibmvnic_init_fail; 5171 } while (rc == EAGAIN); 5172 5173 rc = init_stats_buffers(adapter); 5174 if (rc) 5175 goto ibmvnic_init_fail; 5176 5177 rc = init_stats_token(adapter); 5178 if (rc) 5179 goto ibmvnic_stats_fail; 5180 5181 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5182 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5183 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5184 5185 rc = device_create_file(&dev->dev, &dev_attr_failover); 5186 if (rc) 5187 goto ibmvnic_dev_file_err; 5188 5189 netif_carrier_off(netdev); 5190 rc = register_netdev(netdev); 5191 if (rc) { 5192 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5193 goto ibmvnic_register_fail; 5194 } 5195 dev_info(&dev->dev, "ibmvnic registered\n"); 5196 5197 adapter->state = VNIC_PROBED; 5198 5199 adapter->wait_for_reset = false; 5200 5201 return 0; 5202 5203 ibmvnic_register_fail: 5204 device_remove_file(&dev->dev, &dev_attr_failover); 5205 5206 ibmvnic_dev_file_err: 5207 release_stats_token(adapter); 5208 5209 ibmvnic_stats_fail: 5210 release_stats_buffers(adapter); 5211 5212 ibmvnic_init_fail: 5213 release_sub_crqs(adapter, 1); 5214 release_crq_queue(adapter); 5215 mutex_destroy(&adapter->fw_lock); 5216 free_netdev(netdev); 5217 5218 return rc; 5219 } 5220 5221 static int ibmvnic_remove(struct vio_dev *dev) 5222 { 5223 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5224 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5225 unsigned long flags; 5226 5227 spin_lock_irqsave(&adapter->state_lock, flags); 5228 if (adapter->state == VNIC_RESETTING) { 5229 spin_unlock_irqrestore(&adapter->state_lock, flags); 5230 return -EBUSY; 5231 } 5232 5233 adapter->state = VNIC_REMOVING; 5234 spin_unlock_irqrestore(&adapter->state_lock, flags); 5235 5236 flush_work(&adapter->ibmvnic_reset); 5237 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5238 5239 rtnl_lock(); 5240 unregister_netdevice(netdev); 5241 5242 release_resources(adapter); 5243 release_sub_crqs(adapter, 1); 5244 release_crq_queue(adapter); 5245 5246 release_stats_token(adapter); 5247 release_stats_buffers(adapter); 5248 5249 adapter->state = VNIC_REMOVED; 5250 5251 rtnl_unlock(); 5252 mutex_destroy(&adapter->fw_lock); 5253 device_remove_file(&dev->dev, &dev_attr_failover); 5254 free_netdev(netdev); 5255 dev_set_drvdata(&dev->dev, NULL); 5256 5257 return 0; 5258 } 5259 5260 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5261 const char *buf, size_t count) 5262 { 5263 struct net_device *netdev = dev_get_drvdata(dev); 5264 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5265 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5266 __be64 session_token; 5267 long rc; 5268 5269 if (!sysfs_streq(buf, "1")) 5270 return -EINVAL; 5271 5272 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5273 H_GET_SESSION_TOKEN, 0, 0, 0); 5274 if (rc) { 5275 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5276 rc); 5277 return -EINVAL; 5278 } 5279 5280 session_token = (__be64)retbuf[0]; 5281 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5282 be64_to_cpu(session_token)); 5283 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5284 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5285 if (rc) { 5286 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5287 rc); 5288 return -EINVAL; 5289 } 5290 5291 return count; 5292 } 5293 5294 static DEVICE_ATTR_WO(failover); 5295 5296 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5297 { 5298 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5299 struct ibmvnic_adapter *adapter; 5300 struct iommu_table *tbl; 5301 unsigned long ret = 0; 5302 int i; 5303 5304 tbl = get_iommu_table_base(&vdev->dev); 5305 5306 /* netdev inits at probe time along with the structures we need below*/ 5307 if (!netdev) 5308 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5309 5310 adapter = netdev_priv(netdev); 5311 5312 ret += PAGE_SIZE; /* the crq message queue */ 5313 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5314 5315 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5316 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5317 5318 for (i = 0; i < adapter->num_active_rx_pools; i++) 5319 ret += adapter->rx_pool[i].size * 5320 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5321 5322 return ret; 5323 } 5324 5325 static int ibmvnic_resume(struct device *dev) 5326 { 5327 struct net_device *netdev = dev_get_drvdata(dev); 5328 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5329 5330 if (adapter->state != VNIC_OPEN) 5331 return 0; 5332 5333 tasklet_schedule(&adapter->tasklet); 5334 5335 return 0; 5336 } 5337 5338 static const struct vio_device_id ibmvnic_device_table[] = { 5339 {"network", "IBM,vnic"}, 5340 {"", "" } 5341 }; 5342 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5343 5344 static const struct dev_pm_ops ibmvnic_pm_ops = { 5345 .resume = ibmvnic_resume 5346 }; 5347 5348 static struct vio_driver ibmvnic_driver = { 5349 .id_table = ibmvnic_device_table, 5350 .probe = ibmvnic_probe, 5351 .remove = ibmvnic_remove, 5352 .get_desired_dma = ibmvnic_get_desired_dma, 5353 .name = ibmvnic_driver_name, 5354 .pm = &ibmvnic_pm_ops, 5355 }; 5356 5357 /* module functions */ 5358 static int __init ibmvnic_module_init(void) 5359 { 5360 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5361 IBMVNIC_DRIVER_VERSION); 5362 5363 return vio_register_driver(&ibmvnic_driver); 5364 } 5365 5366 static void __exit ibmvnic_module_exit(void) 5367 { 5368 vio_unregister_driver(&ibmvnic_driver); 5369 } 5370 5371 module_init(ibmvnic_module_init); 5372 module_exit(ibmvnic_module_exit); 5373