1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/kthread.h> 57 #include <linux/seq_file.h> 58 #include <linux/interrupt.h> 59 #include <net/net_namespace.h> 60 #include <asm/hvcall.h> 61 #include <linux/atomic.h> 62 #include <asm/vio.h> 63 #include <asm/iommu.h> 64 #include <linux/uaccess.h> 65 #include <asm/firmware.h> 66 #include <linux/workqueue.h> 67 #include <linux/if_vlan.h> 68 #include <linux/utsname.h> 69 70 #include "ibmvnic.h" 71 72 static const char ibmvnic_driver_name[] = "ibmvnic"; 73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 74 75 MODULE_AUTHOR("Santiago Leon"); 76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 77 MODULE_LICENSE("GPL"); 78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 79 80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 81 static int ibmvnic_remove(struct vio_dev *); 82 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 87 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 88 union sub_crq *sub_crq); 89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 91 static int enable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int disable_scrq_irq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static int pending_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 98 struct ibmvnic_sub_crq_queue *); 99 static int ibmvnic_poll(struct napi_struct *napi, int data); 100 static void send_query_map(struct ibmvnic_adapter *adapter); 101 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 102 static int send_request_unmap(struct ibmvnic_adapter *, u8); 103 static int send_login(struct ibmvnic_adapter *adapter); 104 static void send_query_cap(struct ibmvnic_adapter *adapter); 105 static int init_sub_crqs(struct ibmvnic_adapter *); 106 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 107 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 108 static void release_crq_queue(struct ibmvnic_adapter *); 109 static int __ibmvnic_set_mac(struct net_device *, u8 *); 110 static int init_crq_queue(struct ibmvnic_adapter *adapter); 111 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 112 113 struct ibmvnic_stat { 114 char name[ETH_GSTRING_LEN]; 115 int offset; 116 }; 117 118 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 119 offsetof(struct ibmvnic_statistics, stat)) 120 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 121 122 static const struct ibmvnic_stat ibmvnic_stats[] = { 123 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 124 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 125 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 126 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 127 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 128 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 129 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 130 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 131 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 132 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 133 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 134 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 135 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 136 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 137 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 138 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 139 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 140 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 141 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 142 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 143 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 144 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 145 }; 146 147 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 148 unsigned long length, unsigned long *number, 149 unsigned long *irq) 150 { 151 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 152 long rc; 153 154 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 155 *number = retbuf[0]; 156 *irq = retbuf[1]; 157 158 return rc; 159 } 160 161 /** 162 * ibmvnic_wait_for_completion - Check device state and wait for completion 163 * @adapter: private device data 164 * @comp_done: completion structure to wait for 165 * @timeout: time to wait in milliseconds 166 * 167 * Wait for a completion signal or until the timeout limit is reached 168 * while checking that the device is still active. 169 */ 170 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 171 struct completion *comp_done, 172 unsigned long timeout) 173 { 174 struct net_device *netdev; 175 unsigned long div_timeout; 176 u8 retry; 177 178 netdev = adapter->netdev; 179 retry = 5; 180 div_timeout = msecs_to_jiffies(timeout / retry); 181 while (true) { 182 if (!adapter->crq.active) { 183 netdev_err(netdev, "Device down!\n"); 184 return -ENODEV; 185 } 186 if (!retry--) 187 break; 188 if (wait_for_completion_timeout(comp_done, div_timeout)) 189 return 0; 190 } 191 netdev_err(netdev, "Operation timed out.\n"); 192 return -ETIMEDOUT; 193 } 194 195 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 196 struct ibmvnic_long_term_buff *ltb, int size) 197 { 198 struct device *dev = &adapter->vdev->dev; 199 int rc; 200 201 ltb->size = size; 202 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 203 GFP_KERNEL); 204 205 if (!ltb->buff) { 206 dev_err(dev, "Couldn't alloc long term buffer\n"); 207 return -ENOMEM; 208 } 209 ltb->map_id = adapter->map_id; 210 adapter->map_id++; 211 212 mutex_lock(&adapter->fw_lock); 213 adapter->fw_done_rc = 0; 214 reinit_completion(&adapter->fw_done); 215 rc = send_request_map(adapter, ltb->addr, 216 ltb->size, ltb->map_id); 217 if (rc) { 218 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 219 mutex_unlock(&adapter->fw_lock); 220 return rc; 221 } 222 223 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 224 if (rc) { 225 dev_err(dev, 226 "Long term map request aborted or timed out,rc = %d\n", 227 rc); 228 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 229 mutex_unlock(&adapter->fw_lock); 230 return rc; 231 } 232 233 if (adapter->fw_done_rc) { 234 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 235 adapter->fw_done_rc); 236 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 237 mutex_unlock(&adapter->fw_lock); 238 return -1; 239 } 240 mutex_unlock(&adapter->fw_lock); 241 return 0; 242 } 243 244 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 245 struct ibmvnic_long_term_buff *ltb) 246 { 247 struct device *dev = &adapter->vdev->dev; 248 249 if (!ltb->buff) 250 return; 251 252 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 253 adapter->reset_reason != VNIC_RESET_MOBILITY) 254 send_request_unmap(adapter, ltb->map_id); 255 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 256 } 257 258 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 259 struct ibmvnic_long_term_buff *ltb) 260 { 261 struct device *dev = &adapter->vdev->dev; 262 int rc; 263 264 memset(ltb->buff, 0, ltb->size); 265 266 mutex_lock(&adapter->fw_lock); 267 adapter->fw_done_rc = 0; 268 269 reinit_completion(&adapter->fw_done); 270 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 271 if (rc) { 272 mutex_unlock(&adapter->fw_lock); 273 return rc; 274 } 275 276 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 277 if (rc) { 278 dev_info(dev, 279 "Reset failed, long term map request timed out or aborted\n"); 280 mutex_unlock(&adapter->fw_lock); 281 return rc; 282 } 283 284 if (adapter->fw_done_rc) { 285 dev_info(dev, 286 "Reset failed, attempting to free and reallocate buffer\n"); 287 free_long_term_buff(adapter, ltb); 288 mutex_unlock(&adapter->fw_lock); 289 return alloc_long_term_buff(adapter, ltb, ltb->size); 290 } 291 mutex_unlock(&adapter->fw_lock); 292 return 0; 293 } 294 295 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 296 { 297 int i; 298 299 for (i = 0; i < adapter->num_active_rx_pools; i++) 300 adapter->rx_pool[i].active = 0; 301 } 302 303 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 304 struct ibmvnic_rx_pool *pool) 305 { 306 int count = pool->size - atomic_read(&pool->available); 307 u64 handle = adapter->rx_scrq[pool->index]->handle; 308 struct device *dev = &adapter->vdev->dev; 309 int buffers_added = 0; 310 unsigned long lpar_rc; 311 union sub_crq sub_crq; 312 struct sk_buff *skb; 313 unsigned int offset; 314 dma_addr_t dma_addr; 315 unsigned char *dst; 316 int shift = 0; 317 int index; 318 int i; 319 320 if (!pool->active) 321 return; 322 323 for (i = 0; i < count; ++i) { 324 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 325 if (!skb) { 326 dev_err(dev, "Couldn't replenish rx buff\n"); 327 adapter->replenish_no_mem++; 328 break; 329 } 330 331 index = pool->free_map[pool->next_free]; 332 333 if (pool->rx_buff[index].skb) 334 dev_err(dev, "Inconsistent free_map!\n"); 335 336 /* Copy the skb to the long term mapped DMA buffer */ 337 offset = index * pool->buff_size; 338 dst = pool->long_term_buff.buff + offset; 339 memset(dst, 0, pool->buff_size); 340 dma_addr = pool->long_term_buff.addr + offset; 341 pool->rx_buff[index].data = dst; 342 343 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 344 pool->rx_buff[index].dma = dma_addr; 345 pool->rx_buff[index].skb = skb; 346 pool->rx_buff[index].pool_index = pool->index; 347 pool->rx_buff[index].size = pool->buff_size; 348 349 memset(&sub_crq, 0, sizeof(sub_crq)); 350 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 351 sub_crq.rx_add.correlator = 352 cpu_to_be64((u64)&pool->rx_buff[index]); 353 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 354 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 355 356 /* The length field of the sCRQ is defined to be 24 bits so the 357 * buffer size needs to be left shifted by a byte before it is 358 * converted to big endian to prevent the last byte from being 359 * truncated. 360 */ 361 #ifdef __LITTLE_ENDIAN__ 362 shift = 8; 363 #endif 364 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 365 366 lpar_rc = send_subcrq(adapter, handle, &sub_crq); 367 if (lpar_rc != H_SUCCESS) 368 goto failure; 369 370 buffers_added++; 371 adapter->replenish_add_buff_success++; 372 pool->next_free = (pool->next_free + 1) % pool->size; 373 } 374 atomic_add(buffers_added, &pool->available); 375 return; 376 377 failure: 378 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 379 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 380 pool->free_map[pool->next_free] = index; 381 pool->rx_buff[index].skb = NULL; 382 383 dev_kfree_skb_any(skb); 384 adapter->replenish_add_buff_failure++; 385 atomic_add(buffers_added, &pool->available); 386 387 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 388 /* Disable buffer pool replenishment and report carrier off if 389 * queue is closed or pending failover. 390 * Firmware guarantees that a signal will be sent to the 391 * driver, triggering a reset. 392 */ 393 deactivate_rx_pools(adapter); 394 netif_carrier_off(adapter->netdev); 395 } 396 } 397 398 static void replenish_pools(struct ibmvnic_adapter *adapter) 399 { 400 int i; 401 402 adapter->replenish_task_cycles++; 403 for (i = 0; i < adapter->num_active_rx_pools; i++) { 404 if (adapter->rx_pool[i].active) 405 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 406 } 407 } 408 409 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 410 { 411 kfree(adapter->tx_stats_buffers); 412 kfree(adapter->rx_stats_buffers); 413 adapter->tx_stats_buffers = NULL; 414 adapter->rx_stats_buffers = NULL; 415 } 416 417 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 418 { 419 adapter->tx_stats_buffers = 420 kcalloc(IBMVNIC_MAX_QUEUES, 421 sizeof(struct ibmvnic_tx_queue_stats), 422 GFP_KERNEL); 423 if (!adapter->tx_stats_buffers) 424 return -ENOMEM; 425 426 adapter->rx_stats_buffers = 427 kcalloc(IBMVNIC_MAX_QUEUES, 428 sizeof(struct ibmvnic_rx_queue_stats), 429 GFP_KERNEL); 430 if (!adapter->rx_stats_buffers) 431 return -ENOMEM; 432 433 return 0; 434 } 435 436 static void release_stats_token(struct ibmvnic_adapter *adapter) 437 { 438 struct device *dev = &adapter->vdev->dev; 439 440 if (!adapter->stats_token) 441 return; 442 443 dma_unmap_single(dev, adapter->stats_token, 444 sizeof(struct ibmvnic_statistics), 445 DMA_FROM_DEVICE); 446 adapter->stats_token = 0; 447 } 448 449 static int init_stats_token(struct ibmvnic_adapter *adapter) 450 { 451 struct device *dev = &adapter->vdev->dev; 452 dma_addr_t stok; 453 454 stok = dma_map_single(dev, &adapter->stats, 455 sizeof(struct ibmvnic_statistics), 456 DMA_FROM_DEVICE); 457 if (dma_mapping_error(dev, stok)) { 458 dev_err(dev, "Couldn't map stats buffer\n"); 459 return -1; 460 } 461 462 adapter->stats_token = stok; 463 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 464 return 0; 465 } 466 467 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 468 { 469 struct ibmvnic_rx_pool *rx_pool; 470 u64 buff_size; 471 int rx_scrqs; 472 int i, j, rc; 473 474 if (!adapter->rx_pool) 475 return -1; 476 477 buff_size = adapter->cur_rx_buf_sz; 478 rx_scrqs = adapter->num_active_rx_pools; 479 for (i = 0; i < rx_scrqs; i++) { 480 rx_pool = &adapter->rx_pool[i]; 481 482 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 483 484 if (rx_pool->buff_size != buff_size) { 485 free_long_term_buff(adapter, &rx_pool->long_term_buff); 486 rx_pool->buff_size = buff_size; 487 rc = alloc_long_term_buff(adapter, 488 &rx_pool->long_term_buff, 489 rx_pool->size * 490 rx_pool->buff_size); 491 } else { 492 rc = reset_long_term_buff(adapter, 493 &rx_pool->long_term_buff); 494 } 495 496 if (rc) 497 return rc; 498 499 for (j = 0; j < rx_pool->size; j++) 500 rx_pool->free_map[j] = j; 501 502 memset(rx_pool->rx_buff, 0, 503 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 504 505 atomic_set(&rx_pool->available, 0); 506 rx_pool->next_alloc = 0; 507 rx_pool->next_free = 0; 508 rx_pool->active = 1; 509 } 510 511 return 0; 512 } 513 514 static void release_rx_pools(struct ibmvnic_adapter *adapter) 515 { 516 struct ibmvnic_rx_pool *rx_pool; 517 int i, j; 518 519 if (!adapter->rx_pool) 520 return; 521 522 for (i = 0; i < adapter->num_active_rx_pools; i++) { 523 rx_pool = &adapter->rx_pool[i]; 524 525 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 526 527 kfree(rx_pool->free_map); 528 free_long_term_buff(adapter, &rx_pool->long_term_buff); 529 530 if (!rx_pool->rx_buff) 531 continue; 532 533 for (j = 0; j < rx_pool->size; j++) { 534 if (rx_pool->rx_buff[j].skb) { 535 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 536 rx_pool->rx_buff[j].skb = NULL; 537 } 538 } 539 540 kfree(rx_pool->rx_buff); 541 } 542 543 kfree(adapter->rx_pool); 544 adapter->rx_pool = NULL; 545 adapter->num_active_rx_pools = 0; 546 } 547 548 static int init_rx_pools(struct net_device *netdev) 549 { 550 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 551 struct device *dev = &adapter->vdev->dev; 552 struct ibmvnic_rx_pool *rx_pool; 553 int rxadd_subcrqs; 554 u64 buff_size; 555 int i, j; 556 557 rxadd_subcrqs = adapter->num_active_rx_scrqs; 558 buff_size = adapter->cur_rx_buf_sz; 559 560 adapter->rx_pool = kcalloc(rxadd_subcrqs, 561 sizeof(struct ibmvnic_rx_pool), 562 GFP_KERNEL); 563 if (!adapter->rx_pool) { 564 dev_err(dev, "Failed to allocate rx pools\n"); 565 return -1; 566 } 567 568 adapter->num_active_rx_pools = rxadd_subcrqs; 569 570 for (i = 0; i < rxadd_subcrqs; i++) { 571 rx_pool = &adapter->rx_pool[i]; 572 573 netdev_dbg(adapter->netdev, 574 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 575 i, adapter->req_rx_add_entries_per_subcrq, 576 buff_size); 577 578 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 579 rx_pool->index = i; 580 rx_pool->buff_size = buff_size; 581 rx_pool->active = 1; 582 583 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 584 GFP_KERNEL); 585 if (!rx_pool->free_map) { 586 release_rx_pools(adapter); 587 return -1; 588 } 589 590 rx_pool->rx_buff = kcalloc(rx_pool->size, 591 sizeof(struct ibmvnic_rx_buff), 592 GFP_KERNEL); 593 if (!rx_pool->rx_buff) { 594 dev_err(dev, "Couldn't alloc rx buffers\n"); 595 release_rx_pools(adapter); 596 return -1; 597 } 598 599 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 600 rx_pool->size * rx_pool->buff_size)) { 601 release_rx_pools(adapter); 602 return -1; 603 } 604 605 for (j = 0; j < rx_pool->size; ++j) 606 rx_pool->free_map[j] = j; 607 608 atomic_set(&rx_pool->available, 0); 609 rx_pool->next_alloc = 0; 610 rx_pool->next_free = 0; 611 } 612 613 return 0; 614 } 615 616 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 617 struct ibmvnic_tx_pool *tx_pool) 618 { 619 int rc, i; 620 621 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 622 if (rc) 623 return rc; 624 625 memset(tx_pool->tx_buff, 0, 626 tx_pool->num_buffers * 627 sizeof(struct ibmvnic_tx_buff)); 628 629 for (i = 0; i < tx_pool->num_buffers; i++) 630 tx_pool->free_map[i] = i; 631 632 tx_pool->consumer_index = 0; 633 tx_pool->producer_index = 0; 634 635 return 0; 636 } 637 638 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 639 { 640 int tx_scrqs; 641 int i, rc; 642 643 if (!adapter->tx_pool) 644 return -1; 645 646 tx_scrqs = adapter->num_active_tx_pools; 647 for (i = 0; i < tx_scrqs; i++) { 648 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 649 if (rc) 650 return rc; 651 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 652 if (rc) 653 return rc; 654 } 655 656 return 0; 657 } 658 659 static void release_vpd_data(struct ibmvnic_adapter *adapter) 660 { 661 if (!adapter->vpd) 662 return; 663 664 kfree(adapter->vpd->buff); 665 kfree(adapter->vpd); 666 667 adapter->vpd = NULL; 668 } 669 670 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 671 struct ibmvnic_tx_pool *tx_pool) 672 { 673 kfree(tx_pool->tx_buff); 674 kfree(tx_pool->free_map); 675 free_long_term_buff(adapter, &tx_pool->long_term_buff); 676 } 677 678 static void release_tx_pools(struct ibmvnic_adapter *adapter) 679 { 680 int i; 681 682 if (!adapter->tx_pool) 683 return; 684 685 for (i = 0; i < adapter->num_active_tx_pools; i++) { 686 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 687 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 688 } 689 690 kfree(adapter->tx_pool); 691 adapter->tx_pool = NULL; 692 kfree(adapter->tso_pool); 693 adapter->tso_pool = NULL; 694 adapter->num_active_tx_pools = 0; 695 } 696 697 static int init_one_tx_pool(struct net_device *netdev, 698 struct ibmvnic_tx_pool *tx_pool, 699 int num_entries, int buf_size) 700 { 701 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 702 int i; 703 704 tx_pool->tx_buff = kcalloc(num_entries, 705 sizeof(struct ibmvnic_tx_buff), 706 GFP_KERNEL); 707 if (!tx_pool->tx_buff) 708 return -1; 709 710 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 711 num_entries * buf_size)) 712 return -1; 713 714 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 715 if (!tx_pool->free_map) 716 return -1; 717 718 for (i = 0; i < num_entries; i++) 719 tx_pool->free_map[i] = i; 720 721 tx_pool->consumer_index = 0; 722 tx_pool->producer_index = 0; 723 tx_pool->num_buffers = num_entries; 724 tx_pool->buf_size = buf_size; 725 726 return 0; 727 } 728 729 static int init_tx_pools(struct net_device *netdev) 730 { 731 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 732 int tx_subcrqs; 733 int i, rc; 734 735 tx_subcrqs = adapter->num_active_tx_scrqs; 736 adapter->tx_pool = kcalloc(tx_subcrqs, 737 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 738 if (!adapter->tx_pool) 739 return -1; 740 741 adapter->tso_pool = kcalloc(tx_subcrqs, 742 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 743 if (!adapter->tso_pool) 744 return -1; 745 746 adapter->num_active_tx_pools = tx_subcrqs; 747 748 for (i = 0; i < tx_subcrqs; i++) { 749 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 750 adapter->req_tx_entries_per_subcrq, 751 adapter->req_mtu + VLAN_HLEN); 752 if (rc) { 753 release_tx_pools(adapter); 754 return rc; 755 } 756 757 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 758 IBMVNIC_TSO_BUFS, 759 IBMVNIC_TSO_BUF_SZ); 760 if (rc) { 761 release_tx_pools(adapter); 762 return rc; 763 } 764 } 765 766 return 0; 767 } 768 769 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 770 { 771 int i; 772 773 if (adapter->napi_enabled) 774 return; 775 776 for (i = 0; i < adapter->req_rx_queues; i++) 777 napi_enable(&adapter->napi[i]); 778 779 adapter->napi_enabled = true; 780 } 781 782 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 783 { 784 int i; 785 786 if (!adapter->napi_enabled) 787 return; 788 789 for (i = 0; i < adapter->req_rx_queues; i++) { 790 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 791 napi_disable(&adapter->napi[i]); 792 } 793 794 adapter->napi_enabled = false; 795 } 796 797 static int init_napi(struct ibmvnic_adapter *adapter) 798 { 799 int i; 800 801 adapter->napi = kcalloc(adapter->req_rx_queues, 802 sizeof(struct napi_struct), GFP_KERNEL); 803 if (!adapter->napi) 804 return -ENOMEM; 805 806 for (i = 0; i < adapter->req_rx_queues; i++) { 807 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 808 netif_napi_add(adapter->netdev, &adapter->napi[i], 809 ibmvnic_poll, NAPI_POLL_WEIGHT); 810 } 811 812 adapter->num_active_rx_napi = adapter->req_rx_queues; 813 return 0; 814 } 815 816 static void release_napi(struct ibmvnic_adapter *adapter) 817 { 818 int i; 819 820 if (!adapter->napi) 821 return; 822 823 for (i = 0; i < adapter->num_active_rx_napi; i++) { 824 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 825 netif_napi_del(&adapter->napi[i]); 826 } 827 828 kfree(adapter->napi); 829 adapter->napi = NULL; 830 adapter->num_active_rx_napi = 0; 831 adapter->napi_enabled = false; 832 } 833 834 static int ibmvnic_login(struct net_device *netdev) 835 { 836 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 837 unsigned long timeout = msecs_to_jiffies(30000); 838 int retry_count = 0; 839 int retries = 10; 840 bool retry; 841 int rc; 842 843 do { 844 retry = false; 845 if (retry_count > retries) { 846 netdev_warn(netdev, "Login attempts exceeded\n"); 847 return -1; 848 } 849 850 adapter->init_done_rc = 0; 851 reinit_completion(&adapter->init_done); 852 rc = send_login(adapter); 853 if (rc) { 854 netdev_warn(netdev, "Unable to login\n"); 855 return rc; 856 } 857 858 if (!wait_for_completion_timeout(&adapter->init_done, 859 timeout)) { 860 netdev_warn(netdev, "Login timed out, retrying...\n"); 861 retry = true; 862 adapter->init_done_rc = 0; 863 retry_count++; 864 continue; 865 } 866 867 if (adapter->init_done_rc == ABORTED) { 868 netdev_warn(netdev, "Login aborted, retrying...\n"); 869 retry = true; 870 adapter->init_done_rc = 0; 871 retry_count++; 872 /* FW or device may be busy, so 873 * wait a bit before retrying login 874 */ 875 msleep(500); 876 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 877 retry_count++; 878 release_sub_crqs(adapter, 1); 879 880 retry = true; 881 netdev_dbg(netdev, 882 "Received partial success, retrying...\n"); 883 adapter->init_done_rc = 0; 884 reinit_completion(&adapter->init_done); 885 send_query_cap(adapter); 886 if (!wait_for_completion_timeout(&adapter->init_done, 887 timeout)) { 888 netdev_warn(netdev, 889 "Capabilities query timed out\n"); 890 return -1; 891 } 892 893 rc = init_sub_crqs(adapter); 894 if (rc) { 895 netdev_warn(netdev, 896 "SCRQ initialization failed\n"); 897 return -1; 898 } 899 900 rc = init_sub_crq_irqs(adapter); 901 if (rc) { 902 netdev_warn(netdev, 903 "SCRQ irq initialization failed\n"); 904 return -1; 905 } 906 } else if (adapter->init_done_rc) { 907 netdev_warn(netdev, "Adapter login failed\n"); 908 return -1; 909 } 910 } while (retry); 911 912 __ibmvnic_set_mac(netdev, adapter->mac_addr); 913 914 return 0; 915 } 916 917 static void release_login_buffer(struct ibmvnic_adapter *adapter) 918 { 919 kfree(adapter->login_buf); 920 adapter->login_buf = NULL; 921 } 922 923 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 924 { 925 kfree(adapter->login_rsp_buf); 926 adapter->login_rsp_buf = NULL; 927 } 928 929 static void release_resources(struct ibmvnic_adapter *adapter) 930 { 931 release_vpd_data(adapter); 932 933 release_tx_pools(adapter); 934 release_rx_pools(adapter); 935 936 release_napi(adapter); 937 release_login_rsp_buffer(adapter); 938 } 939 940 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 941 { 942 struct net_device *netdev = adapter->netdev; 943 unsigned long timeout = msecs_to_jiffies(30000); 944 union ibmvnic_crq crq; 945 bool resend; 946 int rc; 947 948 netdev_dbg(netdev, "setting link state %d\n", link_state); 949 950 memset(&crq, 0, sizeof(crq)); 951 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 952 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 953 crq.logical_link_state.link_state = link_state; 954 955 do { 956 resend = false; 957 958 reinit_completion(&adapter->init_done); 959 rc = ibmvnic_send_crq(adapter, &crq); 960 if (rc) { 961 netdev_err(netdev, "Failed to set link state\n"); 962 return rc; 963 } 964 965 if (!wait_for_completion_timeout(&adapter->init_done, 966 timeout)) { 967 netdev_err(netdev, "timeout setting link state\n"); 968 return -1; 969 } 970 971 if (adapter->init_done_rc == PARTIALSUCCESS) { 972 /* Partuial success, delay and re-send */ 973 mdelay(1000); 974 resend = true; 975 } else if (adapter->init_done_rc) { 976 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 977 adapter->init_done_rc); 978 return adapter->init_done_rc; 979 } 980 } while (resend); 981 982 return 0; 983 } 984 985 static int set_real_num_queues(struct net_device *netdev) 986 { 987 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 988 int rc; 989 990 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 991 adapter->req_tx_queues, adapter->req_rx_queues); 992 993 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 994 if (rc) { 995 netdev_err(netdev, "failed to set the number of tx queues\n"); 996 return rc; 997 } 998 999 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1000 if (rc) 1001 netdev_err(netdev, "failed to set the number of rx queues\n"); 1002 1003 return rc; 1004 } 1005 1006 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1007 { 1008 struct device *dev = &adapter->vdev->dev; 1009 union ibmvnic_crq crq; 1010 int len = 0; 1011 int rc; 1012 1013 if (adapter->vpd->buff) 1014 len = adapter->vpd->len; 1015 1016 mutex_lock(&adapter->fw_lock); 1017 adapter->fw_done_rc = 0; 1018 reinit_completion(&adapter->fw_done); 1019 1020 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1021 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1022 rc = ibmvnic_send_crq(adapter, &crq); 1023 if (rc) { 1024 mutex_unlock(&adapter->fw_lock); 1025 return rc; 1026 } 1027 1028 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1029 if (rc) { 1030 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1031 mutex_unlock(&adapter->fw_lock); 1032 return rc; 1033 } 1034 mutex_unlock(&adapter->fw_lock); 1035 1036 if (!adapter->vpd->len) 1037 return -ENODATA; 1038 1039 if (!adapter->vpd->buff) 1040 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1041 else if (adapter->vpd->len != len) 1042 adapter->vpd->buff = 1043 krealloc(adapter->vpd->buff, 1044 adapter->vpd->len, GFP_KERNEL); 1045 1046 if (!adapter->vpd->buff) { 1047 dev_err(dev, "Could allocate VPD buffer\n"); 1048 return -ENOMEM; 1049 } 1050 1051 adapter->vpd->dma_addr = 1052 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1053 DMA_FROM_DEVICE); 1054 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1055 dev_err(dev, "Could not map VPD buffer\n"); 1056 kfree(adapter->vpd->buff); 1057 adapter->vpd->buff = NULL; 1058 return -ENOMEM; 1059 } 1060 1061 mutex_lock(&adapter->fw_lock); 1062 adapter->fw_done_rc = 0; 1063 reinit_completion(&adapter->fw_done); 1064 1065 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1066 crq.get_vpd.cmd = GET_VPD; 1067 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1068 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1069 rc = ibmvnic_send_crq(adapter, &crq); 1070 if (rc) { 1071 kfree(adapter->vpd->buff); 1072 adapter->vpd->buff = NULL; 1073 mutex_unlock(&adapter->fw_lock); 1074 return rc; 1075 } 1076 1077 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1078 if (rc) { 1079 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1080 kfree(adapter->vpd->buff); 1081 adapter->vpd->buff = NULL; 1082 mutex_unlock(&adapter->fw_lock); 1083 return rc; 1084 } 1085 1086 mutex_unlock(&adapter->fw_lock); 1087 return 0; 1088 } 1089 1090 static int init_resources(struct ibmvnic_adapter *adapter) 1091 { 1092 struct net_device *netdev = adapter->netdev; 1093 int rc; 1094 1095 rc = set_real_num_queues(netdev); 1096 if (rc) 1097 return rc; 1098 1099 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1100 if (!adapter->vpd) 1101 return -ENOMEM; 1102 1103 /* Vital Product Data (VPD) */ 1104 rc = ibmvnic_get_vpd(adapter); 1105 if (rc) { 1106 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1107 return rc; 1108 } 1109 1110 adapter->map_id = 1; 1111 1112 rc = init_napi(adapter); 1113 if (rc) 1114 return rc; 1115 1116 send_query_map(adapter); 1117 1118 rc = init_rx_pools(netdev); 1119 if (rc) 1120 return rc; 1121 1122 rc = init_tx_pools(netdev); 1123 return rc; 1124 } 1125 1126 static int __ibmvnic_open(struct net_device *netdev) 1127 { 1128 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1129 enum vnic_state prev_state = adapter->state; 1130 int i, rc; 1131 1132 adapter->state = VNIC_OPENING; 1133 replenish_pools(adapter); 1134 ibmvnic_napi_enable(adapter); 1135 1136 /* We're ready to receive frames, enable the sub-crq interrupts and 1137 * set the logical link state to up 1138 */ 1139 for (i = 0; i < adapter->req_rx_queues; i++) { 1140 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1141 if (prev_state == VNIC_CLOSED) 1142 enable_irq(adapter->rx_scrq[i]->irq); 1143 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1144 } 1145 1146 for (i = 0; i < adapter->req_tx_queues; i++) { 1147 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1148 if (prev_state == VNIC_CLOSED) 1149 enable_irq(adapter->tx_scrq[i]->irq); 1150 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1151 } 1152 1153 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1154 if (rc) { 1155 for (i = 0; i < adapter->req_rx_queues; i++) 1156 napi_disable(&adapter->napi[i]); 1157 release_resources(adapter); 1158 return rc; 1159 } 1160 1161 netif_tx_start_all_queues(netdev); 1162 1163 if (prev_state == VNIC_CLOSED) { 1164 for (i = 0; i < adapter->req_rx_queues; i++) 1165 napi_schedule(&adapter->napi[i]); 1166 } 1167 1168 adapter->state = VNIC_OPEN; 1169 return rc; 1170 } 1171 1172 static int ibmvnic_open(struct net_device *netdev) 1173 { 1174 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1175 int rc; 1176 1177 /* If device failover is pending, just set device state and return. 1178 * Device operation will be handled by reset routine. 1179 */ 1180 if (adapter->failover_pending) { 1181 adapter->state = VNIC_OPEN; 1182 return 0; 1183 } 1184 1185 if (adapter->state != VNIC_CLOSED) { 1186 rc = ibmvnic_login(netdev); 1187 if (rc) 1188 goto out; 1189 1190 rc = init_resources(adapter); 1191 if (rc) { 1192 netdev_err(netdev, "failed to initialize resources\n"); 1193 release_resources(adapter); 1194 goto out; 1195 } 1196 } 1197 1198 rc = __ibmvnic_open(netdev); 1199 1200 out: 1201 /* 1202 * If open fails due to a pending failover, set device state and 1203 * return. Device operation will be handled by reset routine. 1204 */ 1205 if (rc && adapter->failover_pending) { 1206 adapter->state = VNIC_OPEN; 1207 rc = 0; 1208 } 1209 return rc; 1210 } 1211 1212 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1213 { 1214 struct ibmvnic_rx_pool *rx_pool; 1215 struct ibmvnic_rx_buff *rx_buff; 1216 u64 rx_entries; 1217 int rx_scrqs; 1218 int i, j; 1219 1220 if (!adapter->rx_pool) 1221 return; 1222 1223 rx_scrqs = adapter->num_active_rx_pools; 1224 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1225 1226 /* Free any remaining skbs in the rx buffer pools */ 1227 for (i = 0; i < rx_scrqs; i++) { 1228 rx_pool = &adapter->rx_pool[i]; 1229 if (!rx_pool || !rx_pool->rx_buff) 1230 continue; 1231 1232 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1233 for (j = 0; j < rx_entries; j++) { 1234 rx_buff = &rx_pool->rx_buff[j]; 1235 if (rx_buff && rx_buff->skb) { 1236 dev_kfree_skb_any(rx_buff->skb); 1237 rx_buff->skb = NULL; 1238 } 1239 } 1240 } 1241 } 1242 1243 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1244 struct ibmvnic_tx_pool *tx_pool) 1245 { 1246 struct ibmvnic_tx_buff *tx_buff; 1247 u64 tx_entries; 1248 int i; 1249 1250 if (!tx_pool || !tx_pool->tx_buff) 1251 return; 1252 1253 tx_entries = tx_pool->num_buffers; 1254 1255 for (i = 0; i < tx_entries; i++) { 1256 tx_buff = &tx_pool->tx_buff[i]; 1257 if (tx_buff && tx_buff->skb) { 1258 dev_kfree_skb_any(tx_buff->skb); 1259 tx_buff->skb = NULL; 1260 } 1261 } 1262 } 1263 1264 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1265 { 1266 int tx_scrqs; 1267 int i; 1268 1269 if (!adapter->tx_pool || !adapter->tso_pool) 1270 return; 1271 1272 tx_scrqs = adapter->num_active_tx_pools; 1273 1274 /* Free any remaining skbs in the tx buffer pools */ 1275 for (i = 0; i < tx_scrqs; i++) { 1276 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1277 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1278 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1279 } 1280 } 1281 1282 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1283 { 1284 struct net_device *netdev = adapter->netdev; 1285 int i; 1286 1287 if (adapter->tx_scrq) { 1288 for (i = 0; i < adapter->req_tx_queues; i++) 1289 if (adapter->tx_scrq[i]->irq) { 1290 netdev_dbg(netdev, 1291 "Disabling tx_scrq[%d] irq\n", i); 1292 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1293 disable_irq(adapter->tx_scrq[i]->irq); 1294 } 1295 } 1296 1297 if (adapter->rx_scrq) { 1298 for (i = 0; i < adapter->req_rx_queues; i++) { 1299 if (adapter->rx_scrq[i]->irq) { 1300 netdev_dbg(netdev, 1301 "Disabling rx_scrq[%d] irq\n", i); 1302 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1303 disable_irq(adapter->rx_scrq[i]->irq); 1304 } 1305 } 1306 } 1307 } 1308 1309 static void ibmvnic_cleanup(struct net_device *netdev) 1310 { 1311 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1312 1313 /* ensure that transmissions are stopped if called by do_reset */ 1314 if (test_bit(0, &adapter->resetting)) 1315 netif_tx_disable(netdev); 1316 else 1317 netif_tx_stop_all_queues(netdev); 1318 1319 ibmvnic_napi_disable(adapter); 1320 ibmvnic_disable_irqs(adapter); 1321 1322 clean_rx_pools(adapter); 1323 clean_tx_pools(adapter); 1324 } 1325 1326 static int __ibmvnic_close(struct net_device *netdev) 1327 { 1328 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1329 int rc = 0; 1330 1331 adapter->state = VNIC_CLOSING; 1332 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1333 if (rc) 1334 return rc; 1335 adapter->state = VNIC_CLOSED; 1336 return 0; 1337 } 1338 1339 static int ibmvnic_close(struct net_device *netdev) 1340 { 1341 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1342 int rc; 1343 1344 /* If device failover is pending, just set device state and return. 1345 * Device operation will be handled by reset routine. 1346 */ 1347 if (adapter->failover_pending) { 1348 adapter->state = VNIC_CLOSED; 1349 return 0; 1350 } 1351 1352 rc = __ibmvnic_close(netdev); 1353 ibmvnic_cleanup(netdev); 1354 1355 return rc; 1356 } 1357 1358 /** 1359 * build_hdr_data - creates L2/L3/L4 header data buffer 1360 * @hdr_field - bitfield determining needed headers 1361 * @skb - socket buffer 1362 * @hdr_len - array of header lengths 1363 * @tot_len - total length of data 1364 * 1365 * Reads hdr_field to determine which headers are needed by firmware. 1366 * Builds a buffer containing these headers. Saves individual header 1367 * lengths and total buffer length to be used to build descriptors. 1368 */ 1369 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1370 int *hdr_len, u8 *hdr_data) 1371 { 1372 int len = 0; 1373 u8 *hdr; 1374 1375 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1376 hdr_len[0] = sizeof(struct vlan_ethhdr); 1377 else 1378 hdr_len[0] = sizeof(struct ethhdr); 1379 1380 if (skb->protocol == htons(ETH_P_IP)) { 1381 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1382 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1383 hdr_len[2] = tcp_hdrlen(skb); 1384 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1385 hdr_len[2] = sizeof(struct udphdr); 1386 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1387 hdr_len[1] = sizeof(struct ipv6hdr); 1388 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1389 hdr_len[2] = tcp_hdrlen(skb); 1390 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1391 hdr_len[2] = sizeof(struct udphdr); 1392 } else if (skb->protocol == htons(ETH_P_ARP)) { 1393 hdr_len[1] = arp_hdr_len(skb->dev); 1394 hdr_len[2] = 0; 1395 } 1396 1397 memset(hdr_data, 0, 120); 1398 if ((hdr_field >> 6) & 1) { 1399 hdr = skb_mac_header(skb); 1400 memcpy(hdr_data, hdr, hdr_len[0]); 1401 len += hdr_len[0]; 1402 } 1403 1404 if ((hdr_field >> 5) & 1) { 1405 hdr = skb_network_header(skb); 1406 memcpy(hdr_data + len, hdr, hdr_len[1]); 1407 len += hdr_len[1]; 1408 } 1409 1410 if ((hdr_field >> 4) & 1) { 1411 hdr = skb_transport_header(skb); 1412 memcpy(hdr_data + len, hdr, hdr_len[2]); 1413 len += hdr_len[2]; 1414 } 1415 return len; 1416 } 1417 1418 /** 1419 * create_hdr_descs - create header and header extension descriptors 1420 * @hdr_field - bitfield determining needed headers 1421 * @data - buffer containing header data 1422 * @len - length of data buffer 1423 * @hdr_len - array of individual header lengths 1424 * @scrq_arr - descriptor array 1425 * 1426 * Creates header and, if needed, header extension descriptors and 1427 * places them in a descriptor array, scrq_arr 1428 */ 1429 1430 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1431 union sub_crq *scrq_arr) 1432 { 1433 union sub_crq hdr_desc; 1434 int tmp_len = len; 1435 int num_descs = 0; 1436 u8 *data, *cur; 1437 int tmp; 1438 1439 while (tmp_len > 0) { 1440 cur = hdr_data + len - tmp_len; 1441 1442 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1443 if (cur != hdr_data) { 1444 data = hdr_desc.hdr_ext.data; 1445 tmp = tmp_len > 29 ? 29 : tmp_len; 1446 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1447 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1448 hdr_desc.hdr_ext.len = tmp; 1449 } else { 1450 data = hdr_desc.hdr.data; 1451 tmp = tmp_len > 24 ? 24 : tmp_len; 1452 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1453 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1454 hdr_desc.hdr.len = tmp; 1455 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1456 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1457 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1458 hdr_desc.hdr.flag = hdr_field << 1; 1459 } 1460 memcpy(data, cur, tmp); 1461 tmp_len -= tmp; 1462 *scrq_arr = hdr_desc; 1463 scrq_arr++; 1464 num_descs++; 1465 } 1466 1467 return num_descs; 1468 } 1469 1470 /** 1471 * build_hdr_descs_arr - build a header descriptor array 1472 * @skb - socket buffer 1473 * @num_entries - number of descriptors to be sent 1474 * @subcrq - first TX descriptor 1475 * @hdr_field - bit field determining which headers will be sent 1476 * 1477 * This function will build a TX descriptor array with applicable 1478 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1479 */ 1480 1481 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1482 int *num_entries, u8 hdr_field) 1483 { 1484 int hdr_len[3] = {0, 0, 0}; 1485 int tot_len; 1486 u8 *hdr_data = txbuff->hdr_data; 1487 1488 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1489 txbuff->hdr_data); 1490 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1491 txbuff->indir_arr + 1); 1492 } 1493 1494 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1495 struct net_device *netdev) 1496 { 1497 /* For some backing devices, mishandling of small packets 1498 * can result in a loss of connection or TX stall. Device 1499 * architects recommend that no packet should be smaller 1500 * than the minimum MTU value provided to the driver, so 1501 * pad any packets to that length 1502 */ 1503 if (skb->len < netdev->min_mtu) 1504 return skb_put_padto(skb, netdev->min_mtu); 1505 1506 return 0; 1507 } 1508 1509 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1510 { 1511 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1512 int queue_num = skb_get_queue_mapping(skb); 1513 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1514 struct device *dev = &adapter->vdev->dev; 1515 struct ibmvnic_tx_buff *tx_buff = NULL; 1516 struct ibmvnic_sub_crq_queue *tx_scrq; 1517 struct ibmvnic_tx_pool *tx_pool; 1518 unsigned int tx_send_failed = 0; 1519 unsigned int tx_map_failed = 0; 1520 unsigned int tx_dropped = 0; 1521 unsigned int tx_packets = 0; 1522 unsigned int tx_bytes = 0; 1523 dma_addr_t data_dma_addr; 1524 struct netdev_queue *txq; 1525 unsigned long lpar_rc; 1526 union sub_crq tx_crq; 1527 unsigned int offset; 1528 int num_entries = 1; 1529 unsigned char *dst; 1530 int index = 0; 1531 u8 proto = 0; 1532 u64 handle; 1533 netdev_tx_t ret = NETDEV_TX_OK; 1534 1535 if (test_bit(0, &adapter->resetting)) { 1536 if (!netif_subqueue_stopped(netdev, skb)) 1537 netif_stop_subqueue(netdev, queue_num); 1538 dev_kfree_skb_any(skb); 1539 1540 tx_send_failed++; 1541 tx_dropped++; 1542 ret = NETDEV_TX_OK; 1543 goto out; 1544 } 1545 1546 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1547 tx_dropped++; 1548 tx_send_failed++; 1549 ret = NETDEV_TX_OK; 1550 goto out; 1551 } 1552 if (skb_is_gso(skb)) 1553 tx_pool = &adapter->tso_pool[queue_num]; 1554 else 1555 tx_pool = &adapter->tx_pool[queue_num]; 1556 1557 tx_scrq = adapter->tx_scrq[queue_num]; 1558 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1559 handle = tx_scrq->handle; 1560 1561 index = tx_pool->free_map[tx_pool->consumer_index]; 1562 1563 if (index == IBMVNIC_INVALID_MAP) { 1564 dev_kfree_skb_any(skb); 1565 tx_send_failed++; 1566 tx_dropped++; 1567 ret = NETDEV_TX_OK; 1568 goto out; 1569 } 1570 1571 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1572 1573 offset = index * tx_pool->buf_size; 1574 dst = tx_pool->long_term_buff.buff + offset; 1575 memset(dst, 0, tx_pool->buf_size); 1576 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1577 1578 if (skb_shinfo(skb)->nr_frags) { 1579 int cur, i; 1580 1581 /* Copy the head */ 1582 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1583 cur = skb_headlen(skb); 1584 1585 /* Copy the frags */ 1586 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1587 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1588 1589 memcpy(dst + cur, 1590 page_address(skb_frag_page(frag)) + 1591 skb_frag_off(frag), skb_frag_size(frag)); 1592 cur += skb_frag_size(frag); 1593 } 1594 } else { 1595 skb_copy_from_linear_data(skb, dst, skb->len); 1596 } 1597 1598 tx_pool->consumer_index = 1599 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1600 1601 tx_buff = &tx_pool->tx_buff[index]; 1602 tx_buff->skb = skb; 1603 tx_buff->data_dma[0] = data_dma_addr; 1604 tx_buff->data_len[0] = skb->len; 1605 tx_buff->index = index; 1606 tx_buff->pool_index = queue_num; 1607 tx_buff->last_frag = true; 1608 1609 memset(&tx_crq, 0, sizeof(tx_crq)); 1610 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1611 tx_crq.v1.type = IBMVNIC_TX_DESC; 1612 tx_crq.v1.n_crq_elem = 1; 1613 tx_crq.v1.n_sge = 1; 1614 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1615 1616 if (skb_is_gso(skb)) 1617 tx_crq.v1.correlator = 1618 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1619 else 1620 tx_crq.v1.correlator = cpu_to_be32(index); 1621 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1622 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1623 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1624 1625 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1626 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1627 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1628 } 1629 1630 if (skb->protocol == htons(ETH_P_IP)) { 1631 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1632 proto = ip_hdr(skb)->protocol; 1633 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1634 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1635 proto = ipv6_hdr(skb)->nexthdr; 1636 } 1637 1638 if (proto == IPPROTO_TCP) 1639 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1640 else if (proto == IPPROTO_UDP) 1641 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1642 1643 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1644 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1645 hdrs += 2; 1646 } 1647 if (skb_is_gso(skb)) { 1648 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1649 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1650 hdrs += 2; 1651 } 1652 /* determine if l2/3/4 headers are sent to firmware */ 1653 if ((*hdrs >> 7) & 1) { 1654 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1655 tx_crq.v1.n_crq_elem = num_entries; 1656 tx_buff->num_entries = num_entries; 1657 tx_buff->indir_arr[0] = tx_crq; 1658 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1659 sizeof(tx_buff->indir_arr), 1660 DMA_TO_DEVICE); 1661 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1662 dev_kfree_skb_any(skb); 1663 tx_buff->skb = NULL; 1664 if (!firmware_has_feature(FW_FEATURE_CMO)) 1665 dev_err(dev, "tx: unable to map descriptor array\n"); 1666 tx_map_failed++; 1667 tx_dropped++; 1668 ret = NETDEV_TX_OK; 1669 goto tx_err_out; 1670 } 1671 lpar_rc = send_subcrq_indirect(adapter, handle, 1672 (u64)tx_buff->indir_dma, 1673 (u64)num_entries); 1674 dma_unmap_single(dev, tx_buff->indir_dma, 1675 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE); 1676 } else { 1677 tx_buff->num_entries = num_entries; 1678 lpar_rc = send_subcrq(adapter, handle, 1679 &tx_crq); 1680 } 1681 if (lpar_rc != H_SUCCESS) { 1682 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1683 dev_err_ratelimited(dev, "tx: send failed\n"); 1684 dev_kfree_skb_any(skb); 1685 tx_buff->skb = NULL; 1686 1687 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1688 /* Disable TX and report carrier off if queue is closed 1689 * or pending failover. 1690 * Firmware guarantees that a signal will be sent to the 1691 * driver, triggering a reset or some other action. 1692 */ 1693 netif_tx_stop_all_queues(netdev); 1694 netif_carrier_off(netdev); 1695 } 1696 1697 tx_send_failed++; 1698 tx_dropped++; 1699 ret = NETDEV_TX_OK; 1700 goto tx_err_out; 1701 } 1702 1703 if (atomic_add_return(num_entries, &tx_scrq->used) 1704 >= adapter->req_tx_entries_per_subcrq) { 1705 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1706 netif_stop_subqueue(netdev, queue_num); 1707 } 1708 1709 tx_packets++; 1710 tx_bytes += skb->len; 1711 txq->trans_start = jiffies; 1712 ret = NETDEV_TX_OK; 1713 goto out; 1714 1715 tx_err_out: 1716 /* roll back consumer index and map array*/ 1717 if (tx_pool->consumer_index == 0) 1718 tx_pool->consumer_index = 1719 tx_pool->num_buffers - 1; 1720 else 1721 tx_pool->consumer_index--; 1722 tx_pool->free_map[tx_pool->consumer_index] = index; 1723 out: 1724 netdev->stats.tx_dropped += tx_dropped; 1725 netdev->stats.tx_bytes += tx_bytes; 1726 netdev->stats.tx_packets += tx_packets; 1727 adapter->tx_send_failed += tx_send_failed; 1728 adapter->tx_map_failed += tx_map_failed; 1729 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1730 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1731 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1732 1733 return ret; 1734 } 1735 1736 static void ibmvnic_set_multi(struct net_device *netdev) 1737 { 1738 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1739 struct netdev_hw_addr *ha; 1740 union ibmvnic_crq crq; 1741 1742 memset(&crq, 0, sizeof(crq)); 1743 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1744 crq.request_capability.cmd = REQUEST_CAPABILITY; 1745 1746 if (netdev->flags & IFF_PROMISC) { 1747 if (!adapter->promisc_supported) 1748 return; 1749 } else { 1750 if (netdev->flags & IFF_ALLMULTI) { 1751 /* Accept all multicast */ 1752 memset(&crq, 0, sizeof(crq)); 1753 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1754 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1755 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1756 ibmvnic_send_crq(adapter, &crq); 1757 } else if (netdev_mc_empty(netdev)) { 1758 /* Reject all multicast */ 1759 memset(&crq, 0, sizeof(crq)); 1760 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1761 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1762 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1763 ibmvnic_send_crq(adapter, &crq); 1764 } else { 1765 /* Accept one or more multicast(s) */ 1766 netdev_for_each_mc_addr(ha, netdev) { 1767 memset(&crq, 0, sizeof(crq)); 1768 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1769 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1770 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1771 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1772 ha->addr); 1773 ibmvnic_send_crq(adapter, &crq); 1774 } 1775 } 1776 } 1777 } 1778 1779 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1780 { 1781 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1782 union ibmvnic_crq crq; 1783 int rc; 1784 1785 if (!is_valid_ether_addr(dev_addr)) { 1786 rc = -EADDRNOTAVAIL; 1787 goto err; 1788 } 1789 1790 memset(&crq, 0, sizeof(crq)); 1791 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1792 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1793 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1794 1795 mutex_lock(&adapter->fw_lock); 1796 adapter->fw_done_rc = 0; 1797 reinit_completion(&adapter->fw_done); 1798 1799 rc = ibmvnic_send_crq(adapter, &crq); 1800 if (rc) { 1801 rc = -EIO; 1802 mutex_unlock(&adapter->fw_lock); 1803 goto err; 1804 } 1805 1806 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1807 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1808 if (rc || adapter->fw_done_rc) { 1809 rc = -EIO; 1810 mutex_unlock(&adapter->fw_lock); 1811 goto err; 1812 } 1813 mutex_unlock(&adapter->fw_lock); 1814 return 0; 1815 err: 1816 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1817 return rc; 1818 } 1819 1820 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1821 { 1822 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1823 struct sockaddr *addr = p; 1824 int rc; 1825 1826 rc = 0; 1827 if (!is_valid_ether_addr(addr->sa_data)) 1828 return -EADDRNOTAVAIL; 1829 1830 if (adapter->state != VNIC_PROBED) { 1831 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1832 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1833 } 1834 1835 return rc; 1836 } 1837 1838 /** 1839 * do_change_param_reset returns zero if we are able to keep processing reset 1840 * events, or non-zero if we hit a fatal error and must halt. 1841 */ 1842 static int do_change_param_reset(struct ibmvnic_adapter *adapter, 1843 struct ibmvnic_rwi *rwi, 1844 u32 reset_state) 1845 { 1846 struct net_device *netdev = adapter->netdev; 1847 int i, rc; 1848 1849 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n", 1850 rwi->reset_reason); 1851 1852 netif_carrier_off(netdev); 1853 adapter->reset_reason = rwi->reset_reason; 1854 1855 ibmvnic_cleanup(netdev); 1856 1857 if (reset_state == VNIC_OPEN) { 1858 rc = __ibmvnic_close(netdev); 1859 if (rc) 1860 return rc; 1861 } 1862 1863 release_resources(adapter); 1864 release_sub_crqs(adapter, 1); 1865 release_crq_queue(adapter); 1866 1867 adapter->state = VNIC_PROBED; 1868 1869 rc = init_crq_queue(adapter); 1870 1871 if (rc) { 1872 netdev_err(adapter->netdev, 1873 "Couldn't initialize crq. rc=%d\n", rc); 1874 return rc; 1875 } 1876 1877 rc = ibmvnic_reset_init(adapter, true); 1878 if (rc) 1879 return IBMVNIC_INIT_FAILED; 1880 1881 /* If the adapter was in PROBE state prior to the reset, 1882 * exit here. 1883 */ 1884 if (reset_state == VNIC_PROBED) 1885 return 0; 1886 1887 rc = ibmvnic_login(netdev); 1888 if (rc) { 1889 adapter->state = reset_state; 1890 return rc; 1891 } 1892 1893 rc = init_resources(adapter); 1894 if (rc) 1895 return rc; 1896 1897 ibmvnic_disable_irqs(adapter); 1898 1899 adapter->state = VNIC_CLOSED; 1900 1901 if (reset_state == VNIC_CLOSED) 1902 return 0; 1903 1904 rc = __ibmvnic_open(netdev); 1905 if (rc) 1906 return IBMVNIC_OPEN_FAILED; 1907 1908 /* refresh device's multicast list */ 1909 ibmvnic_set_multi(netdev); 1910 1911 /* kick napi */ 1912 for (i = 0; i < adapter->req_rx_queues; i++) 1913 napi_schedule(&adapter->napi[i]); 1914 1915 return 0; 1916 } 1917 1918 /** 1919 * do_reset returns zero if we are able to keep processing reset events, or 1920 * non-zero if we hit a fatal error and must halt. 1921 */ 1922 static int do_reset(struct ibmvnic_adapter *adapter, 1923 struct ibmvnic_rwi *rwi, u32 reset_state) 1924 { 1925 u64 old_num_rx_queues, old_num_tx_queues; 1926 u64 old_num_rx_slots, old_num_tx_slots; 1927 struct net_device *netdev = adapter->netdev; 1928 int i, rc; 1929 1930 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1931 rwi->reset_reason); 1932 1933 rtnl_lock(); 1934 /* 1935 * Now that we have the rtnl lock, clear any pending failover. 1936 * This will ensure ibmvnic_open() has either completed or will 1937 * block until failover is complete. 1938 */ 1939 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 1940 adapter->failover_pending = false; 1941 1942 netif_carrier_off(netdev); 1943 adapter->reset_reason = rwi->reset_reason; 1944 1945 old_num_rx_queues = adapter->req_rx_queues; 1946 old_num_tx_queues = adapter->req_tx_queues; 1947 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1948 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1949 1950 ibmvnic_cleanup(netdev); 1951 1952 if (reset_state == VNIC_OPEN && 1953 adapter->reset_reason != VNIC_RESET_MOBILITY && 1954 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1955 adapter->state = VNIC_CLOSING; 1956 1957 /* Release the RTNL lock before link state change and 1958 * re-acquire after the link state change to allow 1959 * linkwatch_event to grab the RTNL lock and run during 1960 * a reset. 1961 */ 1962 rtnl_unlock(); 1963 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1964 rtnl_lock(); 1965 if (rc) 1966 goto out; 1967 1968 if (adapter->state != VNIC_CLOSING) { 1969 rc = -1; 1970 goto out; 1971 } 1972 1973 adapter->state = VNIC_CLOSED; 1974 } 1975 1976 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1977 /* remove the closed state so when we call open it appears 1978 * we are coming from the probed state. 1979 */ 1980 adapter->state = VNIC_PROBED; 1981 1982 if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1983 rc = ibmvnic_reenable_crq_queue(adapter); 1984 release_sub_crqs(adapter, 1); 1985 } else { 1986 rc = ibmvnic_reset_crq(adapter); 1987 if (rc == H_CLOSED || rc == H_SUCCESS) { 1988 rc = vio_enable_interrupts(adapter->vdev); 1989 if (rc) 1990 netdev_err(adapter->netdev, 1991 "Reset failed to enable interrupts. rc=%d\n", 1992 rc); 1993 } 1994 } 1995 1996 if (rc) { 1997 netdev_err(adapter->netdev, 1998 "Reset couldn't initialize crq. rc=%d\n", rc); 1999 goto out; 2000 } 2001 2002 rc = ibmvnic_reset_init(adapter, true); 2003 if (rc) { 2004 rc = IBMVNIC_INIT_FAILED; 2005 goto out; 2006 } 2007 2008 /* If the adapter was in PROBE state prior to the reset, 2009 * exit here. 2010 */ 2011 if (reset_state == VNIC_PROBED) { 2012 rc = 0; 2013 goto out; 2014 } 2015 2016 rc = ibmvnic_login(netdev); 2017 if (rc) { 2018 adapter->state = reset_state; 2019 goto out; 2020 } 2021 2022 if (adapter->req_rx_queues != old_num_rx_queues || 2023 adapter->req_tx_queues != old_num_tx_queues || 2024 adapter->req_rx_add_entries_per_subcrq != 2025 old_num_rx_slots || 2026 adapter->req_tx_entries_per_subcrq != 2027 old_num_tx_slots || 2028 !adapter->rx_pool || 2029 !adapter->tso_pool || 2030 !adapter->tx_pool) { 2031 release_rx_pools(adapter); 2032 release_tx_pools(adapter); 2033 release_napi(adapter); 2034 release_vpd_data(adapter); 2035 2036 rc = init_resources(adapter); 2037 if (rc) 2038 goto out; 2039 2040 } else { 2041 rc = reset_tx_pools(adapter); 2042 if (rc) { 2043 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2044 rc); 2045 goto out; 2046 } 2047 2048 rc = reset_rx_pools(adapter); 2049 if (rc) { 2050 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2051 rc); 2052 goto out; 2053 } 2054 } 2055 ibmvnic_disable_irqs(adapter); 2056 } 2057 adapter->state = VNIC_CLOSED; 2058 2059 if (reset_state == VNIC_CLOSED) { 2060 rc = 0; 2061 goto out; 2062 } 2063 2064 rc = __ibmvnic_open(netdev); 2065 if (rc) { 2066 rc = IBMVNIC_OPEN_FAILED; 2067 goto out; 2068 } 2069 2070 /* refresh device's multicast list */ 2071 ibmvnic_set_multi(netdev); 2072 2073 /* kick napi */ 2074 for (i = 0; i < adapter->req_rx_queues; i++) 2075 napi_schedule(&adapter->napi[i]); 2076 2077 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 2078 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2079 2080 rc = 0; 2081 2082 out: 2083 rtnl_unlock(); 2084 2085 return rc; 2086 } 2087 2088 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2089 struct ibmvnic_rwi *rwi, u32 reset_state) 2090 { 2091 struct net_device *netdev = adapter->netdev; 2092 int rc; 2093 2094 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2095 rwi->reset_reason); 2096 2097 netif_carrier_off(netdev); 2098 adapter->reset_reason = rwi->reset_reason; 2099 2100 ibmvnic_cleanup(netdev); 2101 release_resources(adapter); 2102 release_sub_crqs(adapter, 0); 2103 release_crq_queue(adapter); 2104 2105 /* remove the closed state so when we call open it appears 2106 * we are coming from the probed state. 2107 */ 2108 adapter->state = VNIC_PROBED; 2109 2110 reinit_completion(&adapter->init_done); 2111 rc = init_crq_queue(adapter); 2112 if (rc) { 2113 netdev_err(adapter->netdev, 2114 "Couldn't initialize crq. rc=%d\n", rc); 2115 return rc; 2116 } 2117 2118 rc = ibmvnic_reset_init(adapter, false); 2119 if (rc) 2120 return rc; 2121 2122 /* If the adapter was in PROBE state prior to the reset, 2123 * exit here. 2124 */ 2125 if (reset_state == VNIC_PROBED) 2126 return 0; 2127 2128 rc = ibmvnic_login(netdev); 2129 if (rc) { 2130 adapter->state = VNIC_PROBED; 2131 return 0; 2132 } 2133 2134 rc = init_resources(adapter); 2135 if (rc) 2136 return rc; 2137 2138 ibmvnic_disable_irqs(adapter); 2139 adapter->state = VNIC_CLOSED; 2140 2141 if (reset_state == VNIC_CLOSED) 2142 return 0; 2143 2144 rc = __ibmvnic_open(netdev); 2145 if (rc) 2146 return IBMVNIC_OPEN_FAILED; 2147 2148 return 0; 2149 } 2150 2151 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2152 { 2153 struct ibmvnic_rwi *rwi; 2154 unsigned long flags; 2155 2156 spin_lock_irqsave(&adapter->rwi_lock, flags); 2157 2158 if (!list_empty(&adapter->rwi_list)) { 2159 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2160 list); 2161 list_del(&rwi->list); 2162 } else { 2163 rwi = NULL; 2164 } 2165 2166 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2167 return rwi; 2168 } 2169 2170 static void free_all_rwi(struct ibmvnic_adapter *adapter) 2171 { 2172 struct ibmvnic_rwi *rwi; 2173 2174 rwi = get_next_rwi(adapter); 2175 while (rwi) { 2176 kfree(rwi); 2177 rwi = get_next_rwi(adapter); 2178 } 2179 } 2180 2181 static void __ibmvnic_reset(struct work_struct *work) 2182 { 2183 struct ibmvnic_rwi *rwi; 2184 struct ibmvnic_adapter *adapter; 2185 bool saved_state = false; 2186 unsigned long flags; 2187 u32 reset_state; 2188 int rc = 0; 2189 2190 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2191 2192 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2193 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2194 IBMVNIC_RESET_DELAY); 2195 return; 2196 } 2197 2198 rwi = get_next_rwi(adapter); 2199 while (rwi) { 2200 spin_lock_irqsave(&adapter->state_lock, flags); 2201 2202 if (adapter->state == VNIC_REMOVING || 2203 adapter->state == VNIC_REMOVED) { 2204 spin_unlock_irqrestore(&adapter->state_lock, flags); 2205 kfree(rwi); 2206 rc = EBUSY; 2207 break; 2208 } 2209 2210 if (!saved_state) { 2211 reset_state = adapter->state; 2212 adapter->state = VNIC_RESETTING; 2213 saved_state = true; 2214 } 2215 spin_unlock_irqrestore(&adapter->state_lock, flags); 2216 2217 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2218 /* CHANGE_PARAM requestor holds rtnl_lock */ 2219 rc = do_change_param_reset(adapter, rwi, reset_state); 2220 } else if (adapter->force_reset_recovery) { 2221 /* 2222 * Since we are doing a hard reset now, clear the 2223 * failover_pending flag so we don't ignore any 2224 * future MOBILITY or other resets. 2225 */ 2226 adapter->failover_pending = false; 2227 2228 /* Transport event occurred during previous reset */ 2229 if (adapter->wait_for_reset) { 2230 /* Previous was CHANGE_PARAM; caller locked */ 2231 adapter->force_reset_recovery = false; 2232 rc = do_hard_reset(adapter, rwi, reset_state); 2233 } else { 2234 rtnl_lock(); 2235 adapter->force_reset_recovery = false; 2236 rc = do_hard_reset(adapter, rwi, reset_state); 2237 rtnl_unlock(); 2238 } 2239 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL && 2240 adapter->from_passive_init)) { 2241 rc = do_reset(adapter, rwi, reset_state); 2242 } 2243 kfree(rwi); 2244 if (rc == IBMVNIC_OPEN_FAILED) { 2245 if (list_empty(&adapter->rwi_list)) 2246 adapter->state = VNIC_CLOSED; 2247 else 2248 adapter->state = reset_state; 2249 rc = 0; 2250 } else if (rc && rc != IBMVNIC_INIT_FAILED && 2251 !adapter->force_reset_recovery) 2252 break; 2253 2254 rwi = get_next_rwi(adapter); 2255 2256 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2257 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2258 adapter->force_reset_recovery = true; 2259 } 2260 2261 if (adapter->wait_for_reset) { 2262 adapter->reset_done_rc = rc; 2263 complete(&adapter->reset_done); 2264 } 2265 2266 if (rc) { 2267 netdev_dbg(adapter->netdev, "Reset failed\n"); 2268 free_all_rwi(adapter); 2269 } 2270 2271 clear_bit_unlock(0, &adapter->resetting); 2272 } 2273 2274 static void __ibmvnic_delayed_reset(struct work_struct *work) 2275 { 2276 struct ibmvnic_adapter *adapter; 2277 2278 adapter = container_of(work, struct ibmvnic_adapter, 2279 ibmvnic_delayed_reset.work); 2280 __ibmvnic_reset(&adapter->ibmvnic_reset); 2281 } 2282 2283 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2284 enum ibmvnic_reset_reason reason) 2285 { 2286 struct list_head *entry, *tmp_entry; 2287 struct ibmvnic_rwi *rwi, *tmp; 2288 struct net_device *netdev = adapter->netdev; 2289 unsigned long flags; 2290 int ret; 2291 2292 /* 2293 * If failover is pending don't schedule any other reset. 2294 * Instead let the failover complete. If there is already a 2295 * a failover reset scheduled, we will detect and drop the 2296 * duplicate reset when walking the ->rwi_list below. 2297 */ 2298 if (adapter->state == VNIC_REMOVING || 2299 adapter->state == VNIC_REMOVED || 2300 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 2301 ret = EBUSY; 2302 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2303 goto err; 2304 } 2305 2306 if (adapter->state == VNIC_PROBING) { 2307 netdev_warn(netdev, "Adapter reset during probe\n"); 2308 ret = adapter->init_done_rc = EAGAIN; 2309 goto err; 2310 } 2311 2312 spin_lock_irqsave(&adapter->rwi_lock, flags); 2313 2314 list_for_each(entry, &adapter->rwi_list) { 2315 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2316 if (tmp->reset_reason == reason) { 2317 netdev_dbg(netdev, "Skipping matching reset\n"); 2318 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2319 ret = EBUSY; 2320 goto err; 2321 } 2322 } 2323 2324 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2325 if (!rwi) { 2326 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2327 ibmvnic_close(netdev); 2328 ret = ENOMEM; 2329 goto err; 2330 } 2331 /* if we just received a transport event, 2332 * flush reset queue and process this reset 2333 */ 2334 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2335 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2336 list_del(entry); 2337 } 2338 rwi->reset_reason = reason; 2339 list_add_tail(&rwi->list, &adapter->rwi_list); 2340 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2341 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2342 schedule_work(&adapter->ibmvnic_reset); 2343 2344 return 0; 2345 err: 2346 return -ret; 2347 } 2348 2349 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2350 { 2351 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2352 2353 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2354 } 2355 2356 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2357 struct ibmvnic_rx_buff *rx_buff) 2358 { 2359 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2360 2361 rx_buff->skb = NULL; 2362 2363 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2364 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2365 2366 atomic_dec(&pool->available); 2367 } 2368 2369 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2370 { 2371 struct net_device *netdev = napi->dev; 2372 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2373 int scrq_num = (int)(napi - adapter->napi); 2374 int frames_processed = 0; 2375 2376 restart_poll: 2377 while (frames_processed < budget) { 2378 struct sk_buff *skb; 2379 struct ibmvnic_rx_buff *rx_buff; 2380 union sub_crq *next; 2381 u32 length; 2382 u16 offset; 2383 u8 flags = 0; 2384 2385 if (unlikely(test_bit(0, &adapter->resetting) && 2386 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2387 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2388 napi_complete_done(napi, frames_processed); 2389 return frames_processed; 2390 } 2391 2392 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2393 break; 2394 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2395 rx_buff = 2396 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2397 rx_comp.correlator); 2398 /* do error checking */ 2399 if (next->rx_comp.rc) { 2400 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2401 be16_to_cpu(next->rx_comp.rc)); 2402 /* free the entry */ 2403 next->rx_comp.first = 0; 2404 dev_kfree_skb_any(rx_buff->skb); 2405 remove_buff_from_pool(adapter, rx_buff); 2406 continue; 2407 } else if (!rx_buff->skb) { 2408 /* free the entry */ 2409 next->rx_comp.first = 0; 2410 remove_buff_from_pool(adapter, rx_buff); 2411 continue; 2412 } 2413 2414 length = be32_to_cpu(next->rx_comp.len); 2415 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2416 flags = next->rx_comp.flags; 2417 skb = rx_buff->skb; 2418 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2419 length); 2420 2421 /* VLAN Header has been stripped by the system firmware and 2422 * needs to be inserted by the driver 2423 */ 2424 if (adapter->rx_vlan_header_insertion && 2425 (flags & IBMVNIC_VLAN_STRIPPED)) 2426 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2427 ntohs(next->rx_comp.vlan_tci)); 2428 2429 /* free the entry */ 2430 next->rx_comp.first = 0; 2431 remove_buff_from_pool(adapter, rx_buff); 2432 2433 skb_put(skb, length); 2434 skb->protocol = eth_type_trans(skb, netdev); 2435 skb_record_rx_queue(skb, scrq_num); 2436 2437 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2438 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2439 skb->ip_summed = CHECKSUM_UNNECESSARY; 2440 } 2441 2442 length = skb->len; 2443 napi_gro_receive(napi, skb); /* send it up */ 2444 netdev->stats.rx_packets++; 2445 netdev->stats.rx_bytes += length; 2446 adapter->rx_stats_buffers[scrq_num].packets++; 2447 adapter->rx_stats_buffers[scrq_num].bytes += length; 2448 frames_processed++; 2449 } 2450 2451 if (adapter->state != VNIC_CLOSING) 2452 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2453 2454 if (frames_processed < budget) { 2455 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2456 napi_complete_done(napi, frames_processed); 2457 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2458 napi_reschedule(napi)) { 2459 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2460 goto restart_poll; 2461 } 2462 } 2463 return frames_processed; 2464 } 2465 2466 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2467 { 2468 int rc, ret; 2469 2470 adapter->fallback.mtu = adapter->req_mtu; 2471 adapter->fallback.rx_queues = adapter->req_rx_queues; 2472 adapter->fallback.tx_queues = adapter->req_tx_queues; 2473 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2474 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2475 2476 reinit_completion(&adapter->reset_done); 2477 adapter->wait_for_reset = true; 2478 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2479 2480 if (rc) { 2481 ret = rc; 2482 goto out; 2483 } 2484 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2485 if (rc) { 2486 ret = -ENODEV; 2487 goto out; 2488 } 2489 2490 ret = 0; 2491 if (adapter->reset_done_rc) { 2492 ret = -EIO; 2493 adapter->desired.mtu = adapter->fallback.mtu; 2494 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2495 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2496 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2497 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2498 2499 reinit_completion(&adapter->reset_done); 2500 adapter->wait_for_reset = true; 2501 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2502 if (rc) { 2503 ret = rc; 2504 goto out; 2505 } 2506 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2507 60000); 2508 if (rc) { 2509 ret = -ENODEV; 2510 goto out; 2511 } 2512 } 2513 out: 2514 adapter->wait_for_reset = false; 2515 2516 return ret; 2517 } 2518 2519 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2520 { 2521 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2522 2523 adapter->desired.mtu = new_mtu + ETH_HLEN; 2524 2525 return wait_for_reset(adapter); 2526 } 2527 2528 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2529 struct net_device *dev, 2530 netdev_features_t features) 2531 { 2532 /* Some backing hardware adapters can not 2533 * handle packets with a MSS less than 224 2534 * or with only one segment. 2535 */ 2536 if (skb_is_gso(skb)) { 2537 if (skb_shinfo(skb)->gso_size < 224 || 2538 skb_shinfo(skb)->gso_segs == 1) 2539 features &= ~NETIF_F_GSO_MASK; 2540 } 2541 2542 return features; 2543 } 2544 2545 static const struct net_device_ops ibmvnic_netdev_ops = { 2546 .ndo_open = ibmvnic_open, 2547 .ndo_stop = ibmvnic_close, 2548 .ndo_start_xmit = ibmvnic_xmit, 2549 .ndo_set_rx_mode = ibmvnic_set_multi, 2550 .ndo_set_mac_address = ibmvnic_set_mac, 2551 .ndo_validate_addr = eth_validate_addr, 2552 .ndo_tx_timeout = ibmvnic_tx_timeout, 2553 .ndo_change_mtu = ibmvnic_change_mtu, 2554 .ndo_features_check = ibmvnic_features_check, 2555 }; 2556 2557 /* ethtool functions */ 2558 2559 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2560 struct ethtool_link_ksettings *cmd) 2561 { 2562 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2563 int rc; 2564 2565 rc = send_query_phys_parms(adapter); 2566 if (rc) { 2567 adapter->speed = SPEED_UNKNOWN; 2568 adapter->duplex = DUPLEX_UNKNOWN; 2569 } 2570 cmd->base.speed = adapter->speed; 2571 cmd->base.duplex = adapter->duplex; 2572 cmd->base.port = PORT_FIBRE; 2573 cmd->base.phy_address = 0; 2574 cmd->base.autoneg = AUTONEG_ENABLE; 2575 2576 return 0; 2577 } 2578 2579 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2580 struct ethtool_drvinfo *info) 2581 { 2582 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2583 2584 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2585 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2586 strlcpy(info->fw_version, adapter->fw_version, 2587 sizeof(info->fw_version)); 2588 } 2589 2590 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2591 { 2592 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2593 2594 return adapter->msg_enable; 2595 } 2596 2597 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2598 { 2599 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2600 2601 adapter->msg_enable = data; 2602 } 2603 2604 static u32 ibmvnic_get_link(struct net_device *netdev) 2605 { 2606 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2607 2608 /* Don't need to send a query because we request a logical link up at 2609 * init and then we wait for link state indications 2610 */ 2611 return adapter->logical_link_state; 2612 } 2613 2614 static void ibmvnic_get_ringparam(struct net_device *netdev, 2615 struct ethtool_ringparam *ring) 2616 { 2617 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2618 2619 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2620 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2621 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2622 } else { 2623 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2624 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2625 } 2626 ring->rx_mini_max_pending = 0; 2627 ring->rx_jumbo_max_pending = 0; 2628 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2629 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2630 ring->rx_mini_pending = 0; 2631 ring->rx_jumbo_pending = 0; 2632 } 2633 2634 static int ibmvnic_set_ringparam(struct net_device *netdev, 2635 struct ethtool_ringparam *ring) 2636 { 2637 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2638 int ret; 2639 2640 ret = 0; 2641 adapter->desired.rx_entries = ring->rx_pending; 2642 adapter->desired.tx_entries = ring->tx_pending; 2643 2644 ret = wait_for_reset(adapter); 2645 2646 if (!ret && 2647 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2648 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2649 netdev_info(netdev, 2650 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2651 ring->rx_pending, ring->tx_pending, 2652 adapter->req_rx_add_entries_per_subcrq, 2653 adapter->req_tx_entries_per_subcrq); 2654 return ret; 2655 } 2656 2657 static void ibmvnic_get_channels(struct net_device *netdev, 2658 struct ethtool_channels *channels) 2659 { 2660 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2661 2662 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2663 channels->max_rx = adapter->max_rx_queues; 2664 channels->max_tx = adapter->max_tx_queues; 2665 } else { 2666 channels->max_rx = IBMVNIC_MAX_QUEUES; 2667 channels->max_tx = IBMVNIC_MAX_QUEUES; 2668 } 2669 2670 channels->max_other = 0; 2671 channels->max_combined = 0; 2672 channels->rx_count = adapter->req_rx_queues; 2673 channels->tx_count = adapter->req_tx_queues; 2674 channels->other_count = 0; 2675 channels->combined_count = 0; 2676 } 2677 2678 static int ibmvnic_set_channels(struct net_device *netdev, 2679 struct ethtool_channels *channels) 2680 { 2681 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2682 int ret; 2683 2684 ret = 0; 2685 adapter->desired.rx_queues = channels->rx_count; 2686 adapter->desired.tx_queues = channels->tx_count; 2687 2688 ret = wait_for_reset(adapter); 2689 2690 if (!ret && 2691 (adapter->req_rx_queues != channels->rx_count || 2692 adapter->req_tx_queues != channels->tx_count)) 2693 netdev_info(netdev, 2694 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2695 channels->rx_count, channels->tx_count, 2696 adapter->req_rx_queues, adapter->req_tx_queues); 2697 return ret; 2698 2699 } 2700 2701 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2702 { 2703 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2704 int i; 2705 2706 switch (stringset) { 2707 case ETH_SS_STATS: 2708 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2709 i++, data += ETH_GSTRING_LEN) 2710 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2711 2712 for (i = 0; i < adapter->req_tx_queues; i++) { 2713 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2714 data += ETH_GSTRING_LEN; 2715 2716 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2717 data += ETH_GSTRING_LEN; 2718 2719 snprintf(data, ETH_GSTRING_LEN, 2720 "tx%d_dropped_packets", i); 2721 data += ETH_GSTRING_LEN; 2722 } 2723 2724 for (i = 0; i < adapter->req_rx_queues; i++) { 2725 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2726 data += ETH_GSTRING_LEN; 2727 2728 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2729 data += ETH_GSTRING_LEN; 2730 2731 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2732 data += ETH_GSTRING_LEN; 2733 } 2734 break; 2735 2736 case ETH_SS_PRIV_FLAGS: 2737 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2738 strcpy(data + i * ETH_GSTRING_LEN, 2739 ibmvnic_priv_flags[i]); 2740 break; 2741 default: 2742 return; 2743 } 2744 } 2745 2746 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2747 { 2748 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2749 2750 switch (sset) { 2751 case ETH_SS_STATS: 2752 return ARRAY_SIZE(ibmvnic_stats) + 2753 adapter->req_tx_queues * NUM_TX_STATS + 2754 adapter->req_rx_queues * NUM_RX_STATS; 2755 case ETH_SS_PRIV_FLAGS: 2756 return ARRAY_SIZE(ibmvnic_priv_flags); 2757 default: 2758 return -EOPNOTSUPP; 2759 } 2760 } 2761 2762 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2763 struct ethtool_stats *stats, u64 *data) 2764 { 2765 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2766 union ibmvnic_crq crq; 2767 int i, j; 2768 int rc; 2769 2770 memset(&crq, 0, sizeof(crq)); 2771 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2772 crq.request_statistics.cmd = REQUEST_STATISTICS; 2773 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2774 crq.request_statistics.len = 2775 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2776 2777 /* Wait for data to be written */ 2778 reinit_completion(&adapter->stats_done); 2779 rc = ibmvnic_send_crq(adapter, &crq); 2780 if (rc) 2781 return; 2782 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2783 if (rc) 2784 return; 2785 2786 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2787 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2788 ibmvnic_stats[i].offset)); 2789 2790 for (j = 0; j < adapter->req_tx_queues; j++) { 2791 data[i] = adapter->tx_stats_buffers[j].packets; 2792 i++; 2793 data[i] = adapter->tx_stats_buffers[j].bytes; 2794 i++; 2795 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2796 i++; 2797 } 2798 2799 for (j = 0; j < adapter->req_rx_queues; j++) { 2800 data[i] = adapter->rx_stats_buffers[j].packets; 2801 i++; 2802 data[i] = adapter->rx_stats_buffers[j].bytes; 2803 i++; 2804 data[i] = adapter->rx_stats_buffers[j].interrupts; 2805 i++; 2806 } 2807 } 2808 2809 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2810 { 2811 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2812 2813 return adapter->priv_flags; 2814 } 2815 2816 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2817 { 2818 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2819 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2820 2821 if (which_maxes) 2822 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2823 else 2824 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2825 2826 return 0; 2827 } 2828 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2829 .get_drvinfo = ibmvnic_get_drvinfo, 2830 .get_msglevel = ibmvnic_get_msglevel, 2831 .set_msglevel = ibmvnic_set_msglevel, 2832 .get_link = ibmvnic_get_link, 2833 .get_ringparam = ibmvnic_get_ringparam, 2834 .set_ringparam = ibmvnic_set_ringparam, 2835 .get_channels = ibmvnic_get_channels, 2836 .set_channels = ibmvnic_set_channels, 2837 .get_strings = ibmvnic_get_strings, 2838 .get_sset_count = ibmvnic_get_sset_count, 2839 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2840 .get_link_ksettings = ibmvnic_get_link_ksettings, 2841 .get_priv_flags = ibmvnic_get_priv_flags, 2842 .set_priv_flags = ibmvnic_set_priv_flags, 2843 }; 2844 2845 /* Routines for managing CRQs/sCRQs */ 2846 2847 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2848 struct ibmvnic_sub_crq_queue *scrq) 2849 { 2850 int rc; 2851 2852 if (scrq->irq) { 2853 free_irq(scrq->irq, scrq); 2854 irq_dispose_mapping(scrq->irq); 2855 scrq->irq = 0; 2856 } 2857 2858 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2859 atomic_set(&scrq->used, 0); 2860 scrq->cur = 0; 2861 2862 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2863 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2864 return rc; 2865 } 2866 2867 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2868 { 2869 int i, rc; 2870 2871 for (i = 0; i < adapter->req_tx_queues; i++) { 2872 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2873 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2874 if (rc) 2875 return rc; 2876 } 2877 2878 for (i = 0; i < adapter->req_rx_queues; i++) { 2879 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2880 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2881 if (rc) 2882 return rc; 2883 } 2884 2885 return rc; 2886 } 2887 2888 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2889 struct ibmvnic_sub_crq_queue *scrq, 2890 bool do_h_free) 2891 { 2892 struct device *dev = &adapter->vdev->dev; 2893 long rc; 2894 2895 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2896 2897 if (do_h_free) { 2898 /* Close the sub-crqs */ 2899 do { 2900 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2901 adapter->vdev->unit_address, 2902 scrq->crq_num); 2903 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2904 2905 if (rc) { 2906 netdev_err(adapter->netdev, 2907 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2908 scrq->crq_num, rc); 2909 } 2910 } 2911 2912 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2913 DMA_BIDIRECTIONAL); 2914 free_pages((unsigned long)scrq->msgs, 2); 2915 kfree(scrq); 2916 } 2917 2918 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2919 *adapter) 2920 { 2921 struct device *dev = &adapter->vdev->dev; 2922 struct ibmvnic_sub_crq_queue *scrq; 2923 int rc; 2924 2925 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2926 if (!scrq) 2927 return NULL; 2928 2929 scrq->msgs = 2930 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2931 if (!scrq->msgs) { 2932 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2933 goto zero_page_failed; 2934 } 2935 2936 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2937 DMA_BIDIRECTIONAL); 2938 if (dma_mapping_error(dev, scrq->msg_token)) { 2939 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2940 goto map_failed; 2941 } 2942 2943 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2944 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2945 2946 if (rc == H_RESOURCE) 2947 rc = ibmvnic_reset_crq(adapter); 2948 2949 if (rc == H_CLOSED) { 2950 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2951 } else if (rc) { 2952 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2953 goto reg_failed; 2954 } 2955 2956 scrq->adapter = adapter; 2957 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2958 spin_lock_init(&scrq->lock); 2959 2960 netdev_dbg(adapter->netdev, 2961 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2962 scrq->crq_num, scrq->hw_irq, scrq->irq); 2963 2964 return scrq; 2965 2966 reg_failed: 2967 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2968 DMA_BIDIRECTIONAL); 2969 map_failed: 2970 free_pages((unsigned long)scrq->msgs, 2); 2971 zero_page_failed: 2972 kfree(scrq); 2973 2974 return NULL; 2975 } 2976 2977 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2978 { 2979 int i; 2980 2981 if (adapter->tx_scrq) { 2982 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2983 if (!adapter->tx_scrq[i]) 2984 continue; 2985 2986 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2987 i); 2988 if (adapter->tx_scrq[i]->irq) { 2989 free_irq(adapter->tx_scrq[i]->irq, 2990 adapter->tx_scrq[i]); 2991 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2992 adapter->tx_scrq[i]->irq = 0; 2993 } 2994 2995 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2996 do_h_free); 2997 } 2998 2999 kfree(adapter->tx_scrq); 3000 adapter->tx_scrq = NULL; 3001 adapter->num_active_tx_scrqs = 0; 3002 } 3003 3004 if (adapter->rx_scrq) { 3005 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 3006 if (!adapter->rx_scrq[i]) 3007 continue; 3008 3009 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 3010 i); 3011 if (adapter->rx_scrq[i]->irq) { 3012 free_irq(adapter->rx_scrq[i]->irq, 3013 adapter->rx_scrq[i]); 3014 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 3015 adapter->rx_scrq[i]->irq = 0; 3016 } 3017 3018 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 3019 do_h_free); 3020 } 3021 3022 kfree(adapter->rx_scrq); 3023 adapter->rx_scrq = NULL; 3024 adapter->num_active_rx_scrqs = 0; 3025 } 3026 } 3027 3028 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3029 struct ibmvnic_sub_crq_queue *scrq) 3030 { 3031 struct device *dev = &adapter->vdev->dev; 3032 unsigned long rc; 3033 3034 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3035 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3036 if (rc) 3037 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3038 scrq->hw_irq, rc); 3039 return rc; 3040 } 3041 3042 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3043 struct ibmvnic_sub_crq_queue *scrq) 3044 { 3045 struct device *dev = &adapter->vdev->dev; 3046 unsigned long rc; 3047 3048 if (scrq->hw_irq > 0x100000000ULL) { 3049 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3050 return 1; 3051 } 3052 3053 if (test_bit(0, &adapter->resetting) && 3054 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3055 u64 val = (0xff000000) | scrq->hw_irq; 3056 3057 rc = plpar_hcall_norets(H_EOI, val); 3058 /* H_EOI would fail with rc = H_FUNCTION when running 3059 * in XIVE mode which is expected, but not an error. 3060 */ 3061 if (rc && (rc != H_FUNCTION)) 3062 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3063 val, rc); 3064 } 3065 3066 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3067 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3068 if (rc) 3069 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3070 scrq->hw_irq, rc); 3071 return rc; 3072 } 3073 3074 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3075 struct ibmvnic_sub_crq_queue *scrq) 3076 { 3077 struct device *dev = &adapter->vdev->dev; 3078 struct ibmvnic_tx_pool *tx_pool; 3079 struct ibmvnic_tx_buff *txbuff; 3080 union sub_crq *next; 3081 int index; 3082 int i, j; 3083 3084 restart_loop: 3085 while (pending_scrq(adapter, scrq)) { 3086 unsigned int pool = scrq->pool_index; 3087 int num_entries = 0; 3088 3089 next = ibmvnic_next_scrq(adapter, scrq); 3090 for (i = 0; i < next->tx_comp.num_comps; i++) { 3091 if (next->tx_comp.rcs[i]) { 3092 dev_err(dev, "tx error %x\n", 3093 next->tx_comp.rcs[i]); 3094 continue; 3095 } 3096 index = be32_to_cpu(next->tx_comp.correlators[i]); 3097 if (index & IBMVNIC_TSO_POOL_MASK) { 3098 tx_pool = &adapter->tso_pool[pool]; 3099 index &= ~IBMVNIC_TSO_POOL_MASK; 3100 } else { 3101 tx_pool = &adapter->tx_pool[pool]; 3102 } 3103 3104 txbuff = &tx_pool->tx_buff[index]; 3105 3106 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 3107 if (!txbuff->data_dma[j]) 3108 continue; 3109 3110 txbuff->data_dma[j] = 0; 3111 } 3112 3113 if (txbuff->last_frag) { 3114 dev_kfree_skb_any(txbuff->skb); 3115 txbuff->skb = NULL; 3116 } 3117 3118 num_entries += txbuff->num_entries; 3119 3120 tx_pool->free_map[tx_pool->producer_index] = index; 3121 tx_pool->producer_index = 3122 (tx_pool->producer_index + 1) % 3123 tx_pool->num_buffers; 3124 } 3125 /* remove tx_comp scrq*/ 3126 next->tx_comp.first = 0; 3127 3128 if (atomic_sub_return(num_entries, &scrq->used) <= 3129 (adapter->req_tx_entries_per_subcrq / 2) && 3130 __netif_subqueue_stopped(adapter->netdev, 3131 scrq->pool_index)) { 3132 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3133 netdev_dbg(adapter->netdev, "Started queue %d\n", 3134 scrq->pool_index); 3135 } 3136 } 3137 3138 enable_scrq_irq(adapter, scrq); 3139 3140 if (pending_scrq(adapter, scrq)) { 3141 disable_scrq_irq(adapter, scrq); 3142 goto restart_loop; 3143 } 3144 3145 return 0; 3146 } 3147 3148 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3149 { 3150 struct ibmvnic_sub_crq_queue *scrq = instance; 3151 struct ibmvnic_adapter *adapter = scrq->adapter; 3152 3153 disable_scrq_irq(adapter, scrq); 3154 ibmvnic_complete_tx(adapter, scrq); 3155 3156 return IRQ_HANDLED; 3157 } 3158 3159 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3160 { 3161 struct ibmvnic_sub_crq_queue *scrq = instance; 3162 struct ibmvnic_adapter *adapter = scrq->adapter; 3163 3164 /* When booting a kdump kernel we can hit pending interrupts 3165 * prior to completing driver initialization. 3166 */ 3167 if (unlikely(adapter->state != VNIC_OPEN)) 3168 return IRQ_NONE; 3169 3170 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3171 3172 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3173 disable_scrq_irq(adapter, scrq); 3174 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3175 } 3176 3177 return IRQ_HANDLED; 3178 } 3179 3180 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3181 { 3182 struct device *dev = &adapter->vdev->dev; 3183 struct ibmvnic_sub_crq_queue *scrq; 3184 int i = 0, j = 0; 3185 int rc = 0; 3186 3187 for (i = 0; i < adapter->req_tx_queues; i++) { 3188 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3189 i); 3190 scrq = adapter->tx_scrq[i]; 3191 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3192 3193 if (!scrq->irq) { 3194 rc = -EINVAL; 3195 dev_err(dev, "Error mapping irq\n"); 3196 goto req_tx_irq_failed; 3197 } 3198 3199 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3200 adapter->vdev->unit_address, i); 3201 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3202 0, scrq->name, scrq); 3203 3204 if (rc) { 3205 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3206 scrq->irq, rc); 3207 irq_dispose_mapping(scrq->irq); 3208 goto req_tx_irq_failed; 3209 } 3210 } 3211 3212 for (i = 0; i < adapter->req_rx_queues; i++) { 3213 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3214 i); 3215 scrq = adapter->rx_scrq[i]; 3216 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3217 if (!scrq->irq) { 3218 rc = -EINVAL; 3219 dev_err(dev, "Error mapping irq\n"); 3220 goto req_rx_irq_failed; 3221 } 3222 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3223 adapter->vdev->unit_address, i); 3224 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3225 0, scrq->name, scrq); 3226 if (rc) { 3227 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3228 scrq->irq, rc); 3229 irq_dispose_mapping(scrq->irq); 3230 goto req_rx_irq_failed; 3231 } 3232 } 3233 return rc; 3234 3235 req_rx_irq_failed: 3236 for (j = 0; j < i; j++) { 3237 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3238 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3239 } 3240 i = adapter->req_tx_queues; 3241 req_tx_irq_failed: 3242 for (j = 0; j < i; j++) { 3243 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3244 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3245 } 3246 release_sub_crqs(adapter, 1); 3247 return rc; 3248 } 3249 3250 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3251 { 3252 struct device *dev = &adapter->vdev->dev; 3253 struct ibmvnic_sub_crq_queue **allqueues; 3254 int registered_queues = 0; 3255 int total_queues; 3256 int more = 0; 3257 int i; 3258 3259 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3260 3261 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3262 if (!allqueues) 3263 return -1; 3264 3265 for (i = 0; i < total_queues; i++) { 3266 allqueues[i] = init_sub_crq_queue(adapter); 3267 if (!allqueues[i]) { 3268 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3269 break; 3270 } 3271 registered_queues++; 3272 } 3273 3274 /* Make sure we were able to register the minimum number of queues */ 3275 if (registered_queues < 3276 adapter->min_tx_queues + adapter->min_rx_queues) { 3277 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3278 goto tx_failed; 3279 } 3280 3281 /* Distribute the failed allocated queues*/ 3282 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3283 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3284 switch (i % 3) { 3285 case 0: 3286 if (adapter->req_rx_queues > adapter->min_rx_queues) 3287 adapter->req_rx_queues--; 3288 else 3289 more++; 3290 break; 3291 case 1: 3292 if (adapter->req_tx_queues > adapter->min_tx_queues) 3293 adapter->req_tx_queues--; 3294 else 3295 more++; 3296 break; 3297 } 3298 } 3299 3300 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3301 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3302 if (!adapter->tx_scrq) 3303 goto tx_failed; 3304 3305 for (i = 0; i < adapter->req_tx_queues; i++) { 3306 adapter->tx_scrq[i] = allqueues[i]; 3307 adapter->tx_scrq[i]->pool_index = i; 3308 adapter->num_active_tx_scrqs++; 3309 } 3310 3311 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3312 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3313 if (!adapter->rx_scrq) 3314 goto rx_failed; 3315 3316 for (i = 0; i < adapter->req_rx_queues; i++) { 3317 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3318 adapter->rx_scrq[i]->scrq_num = i; 3319 adapter->num_active_rx_scrqs++; 3320 } 3321 3322 kfree(allqueues); 3323 return 0; 3324 3325 rx_failed: 3326 kfree(adapter->tx_scrq); 3327 adapter->tx_scrq = NULL; 3328 tx_failed: 3329 for (i = 0; i < registered_queues; i++) 3330 release_sub_crq_queue(adapter, allqueues[i], 1); 3331 kfree(allqueues); 3332 return -1; 3333 } 3334 3335 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 3336 { 3337 struct device *dev = &adapter->vdev->dev; 3338 union ibmvnic_crq crq; 3339 int max_entries; 3340 3341 if (!retry) { 3342 /* Sub-CRQ entries are 32 byte long */ 3343 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3344 3345 if (adapter->min_tx_entries_per_subcrq > entries_page || 3346 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3347 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3348 return; 3349 } 3350 3351 if (adapter->desired.mtu) 3352 adapter->req_mtu = adapter->desired.mtu; 3353 else 3354 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3355 3356 if (!adapter->desired.tx_entries) 3357 adapter->desired.tx_entries = 3358 adapter->max_tx_entries_per_subcrq; 3359 if (!adapter->desired.rx_entries) 3360 adapter->desired.rx_entries = 3361 adapter->max_rx_add_entries_per_subcrq; 3362 3363 max_entries = IBMVNIC_MAX_LTB_SIZE / 3364 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3365 3366 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3367 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3368 adapter->desired.tx_entries = max_entries; 3369 } 3370 3371 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3372 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3373 adapter->desired.rx_entries = max_entries; 3374 } 3375 3376 if (adapter->desired.tx_entries) 3377 adapter->req_tx_entries_per_subcrq = 3378 adapter->desired.tx_entries; 3379 else 3380 adapter->req_tx_entries_per_subcrq = 3381 adapter->max_tx_entries_per_subcrq; 3382 3383 if (adapter->desired.rx_entries) 3384 adapter->req_rx_add_entries_per_subcrq = 3385 adapter->desired.rx_entries; 3386 else 3387 adapter->req_rx_add_entries_per_subcrq = 3388 adapter->max_rx_add_entries_per_subcrq; 3389 3390 if (adapter->desired.tx_queues) 3391 adapter->req_tx_queues = 3392 adapter->desired.tx_queues; 3393 else 3394 adapter->req_tx_queues = 3395 adapter->opt_tx_comp_sub_queues; 3396 3397 if (adapter->desired.rx_queues) 3398 adapter->req_rx_queues = 3399 adapter->desired.rx_queues; 3400 else 3401 adapter->req_rx_queues = 3402 adapter->opt_rx_comp_queues; 3403 3404 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3405 } 3406 3407 memset(&crq, 0, sizeof(crq)); 3408 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3409 crq.request_capability.cmd = REQUEST_CAPABILITY; 3410 3411 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3412 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3413 atomic_inc(&adapter->running_cap_crqs); 3414 ibmvnic_send_crq(adapter, &crq); 3415 3416 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3417 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3418 atomic_inc(&adapter->running_cap_crqs); 3419 ibmvnic_send_crq(adapter, &crq); 3420 3421 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3422 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3423 atomic_inc(&adapter->running_cap_crqs); 3424 ibmvnic_send_crq(adapter, &crq); 3425 3426 crq.request_capability.capability = 3427 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3428 crq.request_capability.number = 3429 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3430 atomic_inc(&adapter->running_cap_crqs); 3431 ibmvnic_send_crq(adapter, &crq); 3432 3433 crq.request_capability.capability = 3434 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3435 crq.request_capability.number = 3436 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3437 atomic_inc(&adapter->running_cap_crqs); 3438 ibmvnic_send_crq(adapter, &crq); 3439 3440 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3441 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3442 atomic_inc(&adapter->running_cap_crqs); 3443 ibmvnic_send_crq(adapter, &crq); 3444 3445 if (adapter->netdev->flags & IFF_PROMISC) { 3446 if (adapter->promisc_supported) { 3447 crq.request_capability.capability = 3448 cpu_to_be16(PROMISC_REQUESTED); 3449 crq.request_capability.number = cpu_to_be64(1); 3450 atomic_inc(&adapter->running_cap_crqs); 3451 ibmvnic_send_crq(adapter, &crq); 3452 } 3453 } else { 3454 crq.request_capability.capability = 3455 cpu_to_be16(PROMISC_REQUESTED); 3456 crq.request_capability.number = cpu_to_be64(0); 3457 atomic_inc(&adapter->running_cap_crqs); 3458 ibmvnic_send_crq(adapter, &crq); 3459 } 3460 } 3461 3462 static int pending_scrq(struct ibmvnic_adapter *adapter, 3463 struct ibmvnic_sub_crq_queue *scrq) 3464 { 3465 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3466 3467 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3468 return 1; 3469 else 3470 return 0; 3471 } 3472 3473 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3474 struct ibmvnic_sub_crq_queue *scrq) 3475 { 3476 union sub_crq *entry; 3477 unsigned long flags; 3478 3479 spin_lock_irqsave(&scrq->lock, flags); 3480 entry = &scrq->msgs[scrq->cur]; 3481 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3482 if (++scrq->cur == scrq->size) 3483 scrq->cur = 0; 3484 } else { 3485 entry = NULL; 3486 } 3487 spin_unlock_irqrestore(&scrq->lock, flags); 3488 3489 return entry; 3490 } 3491 3492 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3493 { 3494 struct ibmvnic_crq_queue *queue = &adapter->crq; 3495 union ibmvnic_crq *crq; 3496 3497 crq = &queue->msgs[queue->cur]; 3498 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3499 if (++queue->cur == queue->size) 3500 queue->cur = 0; 3501 } else { 3502 crq = NULL; 3503 } 3504 3505 return crq; 3506 } 3507 3508 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3509 { 3510 switch (rc) { 3511 case H_PARAMETER: 3512 dev_warn_ratelimited(dev, 3513 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3514 func, rc); 3515 break; 3516 case H_CLOSED: 3517 dev_warn_ratelimited(dev, 3518 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3519 func, rc); 3520 break; 3521 default: 3522 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3523 break; 3524 } 3525 } 3526 3527 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3528 union sub_crq *sub_crq) 3529 { 3530 unsigned int ua = adapter->vdev->unit_address; 3531 struct device *dev = &adapter->vdev->dev; 3532 u64 *u64_crq = (u64 *)sub_crq; 3533 int rc; 3534 3535 netdev_dbg(adapter->netdev, 3536 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3537 (unsigned long int)cpu_to_be64(remote_handle), 3538 (unsigned long int)cpu_to_be64(u64_crq[0]), 3539 (unsigned long int)cpu_to_be64(u64_crq[1]), 3540 (unsigned long int)cpu_to_be64(u64_crq[2]), 3541 (unsigned long int)cpu_to_be64(u64_crq[3])); 3542 3543 /* Make sure the hypervisor sees the complete request */ 3544 mb(); 3545 3546 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3547 cpu_to_be64(remote_handle), 3548 cpu_to_be64(u64_crq[0]), 3549 cpu_to_be64(u64_crq[1]), 3550 cpu_to_be64(u64_crq[2]), 3551 cpu_to_be64(u64_crq[3])); 3552 3553 if (rc) 3554 print_subcrq_error(dev, rc, __func__); 3555 3556 return rc; 3557 } 3558 3559 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3560 u64 remote_handle, u64 ioba, u64 num_entries) 3561 { 3562 unsigned int ua = adapter->vdev->unit_address; 3563 struct device *dev = &adapter->vdev->dev; 3564 int rc; 3565 3566 /* Make sure the hypervisor sees the complete request */ 3567 mb(); 3568 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3569 cpu_to_be64(remote_handle), 3570 ioba, num_entries); 3571 3572 if (rc) 3573 print_subcrq_error(dev, rc, __func__); 3574 3575 return rc; 3576 } 3577 3578 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3579 union ibmvnic_crq *crq) 3580 { 3581 unsigned int ua = adapter->vdev->unit_address; 3582 struct device *dev = &adapter->vdev->dev; 3583 u64 *u64_crq = (u64 *)crq; 3584 int rc; 3585 3586 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3587 (unsigned long int)cpu_to_be64(u64_crq[0]), 3588 (unsigned long int)cpu_to_be64(u64_crq[1])); 3589 3590 if (!adapter->crq.active && 3591 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3592 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3593 return -EINVAL; 3594 } 3595 3596 /* Make sure the hypervisor sees the complete request */ 3597 mb(); 3598 3599 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3600 cpu_to_be64(u64_crq[0]), 3601 cpu_to_be64(u64_crq[1])); 3602 3603 if (rc) { 3604 if (rc == H_CLOSED) { 3605 dev_warn(dev, "CRQ Queue closed\n"); 3606 /* do not reset, report the fail, wait for passive init from server */ 3607 } 3608 3609 dev_warn(dev, "Send error (rc=%d)\n", rc); 3610 } 3611 3612 return rc; 3613 } 3614 3615 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3616 { 3617 struct device *dev = &adapter->vdev->dev; 3618 union ibmvnic_crq crq; 3619 int retries = 100; 3620 int rc; 3621 3622 memset(&crq, 0, sizeof(crq)); 3623 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3624 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3625 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3626 3627 do { 3628 rc = ibmvnic_send_crq(adapter, &crq); 3629 if (rc != H_CLOSED) 3630 break; 3631 retries--; 3632 msleep(50); 3633 3634 } while (retries > 0); 3635 3636 if (rc) { 3637 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 3638 return rc; 3639 } 3640 3641 return 0; 3642 } 3643 3644 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3645 { 3646 union ibmvnic_crq crq; 3647 3648 memset(&crq, 0, sizeof(crq)); 3649 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3650 crq.version_exchange.cmd = VERSION_EXCHANGE; 3651 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3652 3653 return ibmvnic_send_crq(adapter, &crq); 3654 } 3655 3656 struct vnic_login_client_data { 3657 u8 type; 3658 __be16 len; 3659 char name[]; 3660 } __packed; 3661 3662 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3663 { 3664 int len; 3665 3666 /* Calculate the amount of buffer space needed for the 3667 * vnic client data in the login buffer. There are four entries, 3668 * OS name, LPAR name, device name, and a null last entry. 3669 */ 3670 len = 4 * sizeof(struct vnic_login_client_data); 3671 len += 6; /* "Linux" plus NULL */ 3672 len += strlen(utsname()->nodename) + 1; 3673 len += strlen(adapter->netdev->name) + 1; 3674 3675 return len; 3676 } 3677 3678 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3679 struct vnic_login_client_data *vlcd) 3680 { 3681 const char *os_name = "Linux"; 3682 int len; 3683 3684 /* Type 1 - LPAR OS */ 3685 vlcd->type = 1; 3686 len = strlen(os_name) + 1; 3687 vlcd->len = cpu_to_be16(len); 3688 strncpy(vlcd->name, os_name, len); 3689 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3690 3691 /* Type 2 - LPAR name */ 3692 vlcd->type = 2; 3693 len = strlen(utsname()->nodename) + 1; 3694 vlcd->len = cpu_to_be16(len); 3695 strncpy(vlcd->name, utsname()->nodename, len); 3696 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3697 3698 /* Type 3 - device name */ 3699 vlcd->type = 3; 3700 len = strlen(adapter->netdev->name) + 1; 3701 vlcd->len = cpu_to_be16(len); 3702 strncpy(vlcd->name, adapter->netdev->name, len); 3703 } 3704 3705 static int send_login(struct ibmvnic_adapter *adapter) 3706 { 3707 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3708 struct ibmvnic_login_buffer *login_buffer; 3709 struct device *dev = &adapter->vdev->dev; 3710 dma_addr_t rsp_buffer_token; 3711 dma_addr_t buffer_token; 3712 size_t rsp_buffer_size; 3713 union ibmvnic_crq crq; 3714 size_t buffer_size; 3715 __be64 *tx_list_p; 3716 __be64 *rx_list_p; 3717 int client_data_len; 3718 struct vnic_login_client_data *vlcd; 3719 int i; 3720 3721 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3722 netdev_err(adapter->netdev, 3723 "RX or TX queues are not allocated, device login failed\n"); 3724 return -1; 3725 } 3726 3727 release_login_rsp_buffer(adapter); 3728 client_data_len = vnic_client_data_len(adapter); 3729 3730 buffer_size = 3731 sizeof(struct ibmvnic_login_buffer) + 3732 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3733 client_data_len; 3734 3735 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3736 if (!login_buffer) 3737 goto buf_alloc_failed; 3738 3739 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3740 DMA_TO_DEVICE); 3741 if (dma_mapping_error(dev, buffer_token)) { 3742 dev_err(dev, "Couldn't map login buffer\n"); 3743 goto buf_map_failed; 3744 } 3745 3746 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3747 sizeof(u64) * adapter->req_tx_queues + 3748 sizeof(u64) * adapter->req_rx_queues + 3749 sizeof(u64) * adapter->req_rx_queues + 3750 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3751 3752 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3753 if (!login_rsp_buffer) 3754 goto buf_rsp_alloc_failed; 3755 3756 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3757 rsp_buffer_size, DMA_FROM_DEVICE); 3758 if (dma_mapping_error(dev, rsp_buffer_token)) { 3759 dev_err(dev, "Couldn't map login rsp buffer\n"); 3760 goto buf_rsp_map_failed; 3761 } 3762 3763 adapter->login_buf = login_buffer; 3764 adapter->login_buf_token = buffer_token; 3765 adapter->login_buf_sz = buffer_size; 3766 adapter->login_rsp_buf = login_rsp_buffer; 3767 adapter->login_rsp_buf_token = rsp_buffer_token; 3768 adapter->login_rsp_buf_sz = rsp_buffer_size; 3769 3770 login_buffer->len = cpu_to_be32(buffer_size); 3771 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3772 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3773 login_buffer->off_txcomp_subcrqs = 3774 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3775 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3776 login_buffer->off_rxcomp_subcrqs = 3777 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3778 sizeof(u64) * adapter->req_tx_queues); 3779 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3780 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3781 3782 tx_list_p = (__be64 *)((char *)login_buffer + 3783 sizeof(struct ibmvnic_login_buffer)); 3784 rx_list_p = (__be64 *)((char *)login_buffer + 3785 sizeof(struct ibmvnic_login_buffer) + 3786 sizeof(u64) * adapter->req_tx_queues); 3787 3788 for (i = 0; i < adapter->req_tx_queues; i++) { 3789 if (adapter->tx_scrq[i]) { 3790 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3791 crq_num); 3792 } 3793 } 3794 3795 for (i = 0; i < adapter->req_rx_queues; i++) { 3796 if (adapter->rx_scrq[i]) { 3797 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3798 crq_num); 3799 } 3800 } 3801 3802 /* Insert vNIC login client data */ 3803 vlcd = (struct vnic_login_client_data *) 3804 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3805 login_buffer->client_data_offset = 3806 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3807 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3808 3809 vnic_add_client_data(adapter, vlcd); 3810 3811 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3812 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3813 netdev_dbg(adapter->netdev, "%016lx\n", 3814 ((unsigned long int *)(adapter->login_buf))[i]); 3815 } 3816 3817 memset(&crq, 0, sizeof(crq)); 3818 crq.login.first = IBMVNIC_CRQ_CMD; 3819 crq.login.cmd = LOGIN; 3820 crq.login.ioba = cpu_to_be32(buffer_token); 3821 crq.login.len = cpu_to_be32(buffer_size); 3822 ibmvnic_send_crq(adapter, &crq); 3823 3824 return 0; 3825 3826 buf_rsp_map_failed: 3827 kfree(login_rsp_buffer); 3828 buf_rsp_alloc_failed: 3829 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3830 buf_map_failed: 3831 kfree(login_buffer); 3832 buf_alloc_failed: 3833 return -1; 3834 } 3835 3836 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3837 u32 len, u8 map_id) 3838 { 3839 union ibmvnic_crq crq; 3840 3841 memset(&crq, 0, sizeof(crq)); 3842 crq.request_map.first = IBMVNIC_CRQ_CMD; 3843 crq.request_map.cmd = REQUEST_MAP; 3844 crq.request_map.map_id = map_id; 3845 crq.request_map.ioba = cpu_to_be32(addr); 3846 crq.request_map.len = cpu_to_be32(len); 3847 return ibmvnic_send_crq(adapter, &crq); 3848 } 3849 3850 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3851 { 3852 union ibmvnic_crq crq; 3853 3854 memset(&crq, 0, sizeof(crq)); 3855 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3856 crq.request_unmap.cmd = REQUEST_UNMAP; 3857 crq.request_unmap.map_id = map_id; 3858 return ibmvnic_send_crq(adapter, &crq); 3859 } 3860 3861 static void send_query_map(struct ibmvnic_adapter *adapter) 3862 { 3863 union ibmvnic_crq crq; 3864 3865 memset(&crq, 0, sizeof(crq)); 3866 crq.query_map.first = IBMVNIC_CRQ_CMD; 3867 crq.query_map.cmd = QUERY_MAP; 3868 ibmvnic_send_crq(adapter, &crq); 3869 } 3870 3871 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3872 static void send_query_cap(struct ibmvnic_adapter *adapter) 3873 { 3874 union ibmvnic_crq crq; 3875 3876 atomic_set(&adapter->running_cap_crqs, 0); 3877 memset(&crq, 0, sizeof(crq)); 3878 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3879 crq.query_capability.cmd = QUERY_CAPABILITY; 3880 3881 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3882 atomic_inc(&adapter->running_cap_crqs); 3883 ibmvnic_send_crq(adapter, &crq); 3884 3885 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3886 atomic_inc(&adapter->running_cap_crqs); 3887 ibmvnic_send_crq(adapter, &crq); 3888 3889 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3890 atomic_inc(&adapter->running_cap_crqs); 3891 ibmvnic_send_crq(adapter, &crq); 3892 3893 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3894 atomic_inc(&adapter->running_cap_crqs); 3895 ibmvnic_send_crq(adapter, &crq); 3896 3897 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3898 atomic_inc(&adapter->running_cap_crqs); 3899 ibmvnic_send_crq(adapter, &crq); 3900 3901 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3902 atomic_inc(&adapter->running_cap_crqs); 3903 ibmvnic_send_crq(adapter, &crq); 3904 3905 crq.query_capability.capability = 3906 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3907 atomic_inc(&adapter->running_cap_crqs); 3908 ibmvnic_send_crq(adapter, &crq); 3909 3910 crq.query_capability.capability = 3911 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3912 atomic_inc(&adapter->running_cap_crqs); 3913 ibmvnic_send_crq(adapter, &crq); 3914 3915 crq.query_capability.capability = 3916 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3917 atomic_inc(&adapter->running_cap_crqs); 3918 ibmvnic_send_crq(adapter, &crq); 3919 3920 crq.query_capability.capability = 3921 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3922 atomic_inc(&adapter->running_cap_crqs); 3923 ibmvnic_send_crq(adapter, &crq); 3924 3925 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3926 atomic_inc(&adapter->running_cap_crqs); 3927 ibmvnic_send_crq(adapter, &crq); 3928 3929 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3930 atomic_inc(&adapter->running_cap_crqs); 3931 ibmvnic_send_crq(adapter, &crq); 3932 3933 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3934 atomic_inc(&adapter->running_cap_crqs); 3935 ibmvnic_send_crq(adapter, &crq); 3936 3937 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3938 atomic_inc(&adapter->running_cap_crqs); 3939 ibmvnic_send_crq(adapter, &crq); 3940 3941 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3942 atomic_inc(&adapter->running_cap_crqs); 3943 ibmvnic_send_crq(adapter, &crq); 3944 3945 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3946 atomic_inc(&adapter->running_cap_crqs); 3947 ibmvnic_send_crq(adapter, &crq); 3948 3949 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3950 atomic_inc(&adapter->running_cap_crqs); 3951 ibmvnic_send_crq(adapter, &crq); 3952 3953 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3954 atomic_inc(&adapter->running_cap_crqs); 3955 ibmvnic_send_crq(adapter, &crq); 3956 3957 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3958 atomic_inc(&adapter->running_cap_crqs); 3959 ibmvnic_send_crq(adapter, &crq); 3960 3961 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3962 atomic_inc(&adapter->running_cap_crqs); 3963 ibmvnic_send_crq(adapter, &crq); 3964 3965 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3966 atomic_inc(&adapter->running_cap_crqs); 3967 ibmvnic_send_crq(adapter, &crq); 3968 3969 crq.query_capability.capability = 3970 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3971 atomic_inc(&adapter->running_cap_crqs); 3972 ibmvnic_send_crq(adapter, &crq); 3973 3974 crq.query_capability.capability = 3975 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3976 atomic_inc(&adapter->running_cap_crqs); 3977 ibmvnic_send_crq(adapter, &crq); 3978 3979 crq.query_capability.capability = 3980 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3981 atomic_inc(&adapter->running_cap_crqs); 3982 ibmvnic_send_crq(adapter, &crq); 3983 3984 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3985 atomic_inc(&adapter->running_cap_crqs); 3986 ibmvnic_send_crq(adapter, &crq); 3987 } 3988 3989 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 3990 { 3991 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 3992 struct device *dev = &adapter->vdev->dev; 3993 union ibmvnic_crq crq; 3994 3995 adapter->ip_offload_tok = 3996 dma_map_single(dev, 3997 &adapter->ip_offload_buf, 3998 buf_sz, 3999 DMA_FROM_DEVICE); 4000 4001 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4002 if (!firmware_has_feature(FW_FEATURE_CMO)) 4003 dev_err(dev, "Couldn't map offload buffer\n"); 4004 return; 4005 } 4006 4007 memset(&crq, 0, sizeof(crq)); 4008 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4009 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4010 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 4011 crq.query_ip_offload.ioba = 4012 cpu_to_be32(adapter->ip_offload_tok); 4013 4014 ibmvnic_send_crq(adapter, &crq); 4015 } 4016 4017 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 4018 { 4019 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 4020 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4021 struct device *dev = &adapter->vdev->dev; 4022 netdev_features_t old_hw_features = 0; 4023 union ibmvnic_crq crq; 4024 4025 adapter->ip_offload_ctrl_tok = 4026 dma_map_single(dev, 4027 ctrl_buf, 4028 sizeof(adapter->ip_offload_ctrl), 4029 DMA_TO_DEVICE); 4030 4031 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4032 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4033 return; 4034 } 4035 4036 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4037 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 4038 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 4039 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 4040 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4041 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 4042 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4043 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 4044 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 4045 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 4046 4047 /* large_rx disabled for now, additional features needed */ 4048 ctrl_buf->large_rx_ipv4 = 0; 4049 ctrl_buf->large_rx_ipv6 = 0; 4050 4051 if (adapter->state != VNIC_PROBING) { 4052 old_hw_features = adapter->netdev->hw_features; 4053 adapter->netdev->hw_features = 0; 4054 } 4055 4056 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4057 4058 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4059 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4060 4061 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4062 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4063 4064 if ((adapter->netdev->features & 4065 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4066 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4067 4068 if (buf->large_tx_ipv4) 4069 adapter->netdev->hw_features |= NETIF_F_TSO; 4070 if (buf->large_tx_ipv6) 4071 adapter->netdev->hw_features |= NETIF_F_TSO6; 4072 4073 if (adapter->state == VNIC_PROBING) { 4074 adapter->netdev->features |= adapter->netdev->hw_features; 4075 } else if (old_hw_features != adapter->netdev->hw_features) { 4076 netdev_features_t tmp = 0; 4077 4078 /* disable features no longer supported */ 4079 adapter->netdev->features &= adapter->netdev->hw_features; 4080 /* turn on features now supported if previously enabled */ 4081 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4082 adapter->netdev->hw_features; 4083 adapter->netdev->features |= 4084 tmp & adapter->netdev->wanted_features; 4085 } 4086 4087 memset(&crq, 0, sizeof(crq)); 4088 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4089 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4090 crq.control_ip_offload.len = 4091 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4092 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4093 ibmvnic_send_crq(adapter, &crq); 4094 } 4095 4096 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 4097 struct ibmvnic_adapter *adapter) 4098 { 4099 struct device *dev = &adapter->vdev->dev; 4100 4101 if (crq->get_vpd_size_rsp.rc.code) { 4102 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 4103 crq->get_vpd_size_rsp.rc.code); 4104 complete(&adapter->fw_done); 4105 return; 4106 } 4107 4108 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 4109 complete(&adapter->fw_done); 4110 } 4111 4112 static void handle_vpd_rsp(union ibmvnic_crq *crq, 4113 struct ibmvnic_adapter *adapter) 4114 { 4115 struct device *dev = &adapter->vdev->dev; 4116 unsigned char *substr = NULL; 4117 u8 fw_level_len = 0; 4118 4119 memset(adapter->fw_version, 0, 32); 4120 4121 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 4122 DMA_FROM_DEVICE); 4123 4124 if (crq->get_vpd_rsp.rc.code) { 4125 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 4126 crq->get_vpd_rsp.rc.code); 4127 goto complete; 4128 } 4129 4130 /* get the position of the firmware version info 4131 * located after the ASCII 'RM' substring in the buffer 4132 */ 4133 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 4134 if (!substr) { 4135 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 4136 goto complete; 4137 } 4138 4139 /* get length of firmware level ASCII substring */ 4140 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 4141 fw_level_len = *(substr + 2); 4142 } else { 4143 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4144 goto complete; 4145 } 4146 4147 /* copy firmware version string from vpd into adapter */ 4148 if ((substr + 3 + fw_level_len) < 4149 (adapter->vpd->buff + adapter->vpd->len)) { 4150 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4151 } else { 4152 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4153 } 4154 4155 complete: 4156 if (adapter->fw_version[0] == '\0') 4157 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4158 complete(&adapter->fw_done); 4159 } 4160 4161 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4162 { 4163 struct device *dev = &adapter->vdev->dev; 4164 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4165 int i; 4166 4167 dma_unmap_single(dev, adapter->ip_offload_tok, 4168 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4169 4170 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4171 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4172 netdev_dbg(adapter->netdev, "%016lx\n", 4173 ((unsigned long int *)(buf))[i]); 4174 4175 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4176 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4177 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4178 buf->tcp_ipv4_chksum); 4179 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4180 buf->tcp_ipv6_chksum); 4181 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4182 buf->udp_ipv4_chksum); 4183 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4184 buf->udp_ipv6_chksum); 4185 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4186 buf->large_tx_ipv4); 4187 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4188 buf->large_tx_ipv6); 4189 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4190 buf->large_rx_ipv4); 4191 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4192 buf->large_rx_ipv6); 4193 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4194 buf->max_ipv4_header_size); 4195 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4196 buf->max_ipv6_header_size); 4197 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4198 buf->max_tcp_header_size); 4199 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4200 buf->max_udp_header_size); 4201 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4202 buf->max_large_tx_size); 4203 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4204 buf->max_large_rx_size); 4205 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4206 buf->ipv6_extension_header); 4207 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4208 buf->tcp_pseudosum_req); 4209 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4210 buf->num_ipv6_ext_headers); 4211 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4212 buf->off_ipv6_ext_headers); 4213 4214 send_control_ip_offload(adapter); 4215 } 4216 4217 static const char *ibmvnic_fw_err_cause(u16 cause) 4218 { 4219 switch (cause) { 4220 case ADAPTER_PROBLEM: 4221 return "adapter problem"; 4222 case BUS_PROBLEM: 4223 return "bus problem"; 4224 case FW_PROBLEM: 4225 return "firmware problem"; 4226 case DD_PROBLEM: 4227 return "device driver problem"; 4228 case EEH_RECOVERY: 4229 return "EEH recovery"; 4230 case FW_UPDATED: 4231 return "firmware updated"; 4232 case LOW_MEMORY: 4233 return "low Memory"; 4234 default: 4235 return "unknown"; 4236 } 4237 } 4238 4239 static void handle_error_indication(union ibmvnic_crq *crq, 4240 struct ibmvnic_adapter *adapter) 4241 { 4242 struct device *dev = &adapter->vdev->dev; 4243 u16 cause; 4244 4245 cause = be16_to_cpu(crq->error_indication.error_cause); 4246 4247 dev_warn_ratelimited(dev, 4248 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4249 crq->error_indication.flags 4250 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4251 ibmvnic_fw_err_cause(cause)); 4252 4253 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4254 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4255 else 4256 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4257 } 4258 4259 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4260 struct ibmvnic_adapter *adapter) 4261 { 4262 struct net_device *netdev = adapter->netdev; 4263 struct device *dev = &adapter->vdev->dev; 4264 long rc; 4265 4266 rc = crq->change_mac_addr_rsp.rc.code; 4267 if (rc) { 4268 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4269 goto out; 4270 } 4271 /* crq->change_mac_addr.mac_addr is the requested one 4272 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 4273 */ 4274 ether_addr_copy(netdev->dev_addr, 4275 &crq->change_mac_addr_rsp.mac_addr[0]); 4276 ether_addr_copy(adapter->mac_addr, 4277 &crq->change_mac_addr_rsp.mac_addr[0]); 4278 out: 4279 complete(&adapter->fw_done); 4280 return rc; 4281 } 4282 4283 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4284 struct ibmvnic_adapter *adapter) 4285 { 4286 struct device *dev = &adapter->vdev->dev; 4287 u64 *req_value; 4288 char *name; 4289 4290 atomic_dec(&adapter->running_cap_crqs); 4291 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4292 case REQ_TX_QUEUES: 4293 req_value = &adapter->req_tx_queues; 4294 name = "tx"; 4295 break; 4296 case REQ_RX_QUEUES: 4297 req_value = &adapter->req_rx_queues; 4298 name = "rx"; 4299 break; 4300 case REQ_RX_ADD_QUEUES: 4301 req_value = &adapter->req_rx_add_queues; 4302 name = "rx_add"; 4303 break; 4304 case REQ_TX_ENTRIES_PER_SUBCRQ: 4305 req_value = &adapter->req_tx_entries_per_subcrq; 4306 name = "tx_entries_per_subcrq"; 4307 break; 4308 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4309 req_value = &adapter->req_rx_add_entries_per_subcrq; 4310 name = "rx_add_entries_per_subcrq"; 4311 break; 4312 case REQ_MTU: 4313 req_value = &adapter->req_mtu; 4314 name = "mtu"; 4315 break; 4316 case PROMISC_REQUESTED: 4317 req_value = &adapter->promisc; 4318 name = "promisc"; 4319 break; 4320 default: 4321 dev_err(dev, "Got invalid cap request rsp %d\n", 4322 crq->request_capability.capability); 4323 return; 4324 } 4325 4326 switch (crq->request_capability_rsp.rc.code) { 4327 case SUCCESS: 4328 break; 4329 case PARTIALSUCCESS: 4330 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4331 *req_value, 4332 (long int)be64_to_cpu(crq->request_capability_rsp. 4333 number), name); 4334 4335 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4336 REQ_MTU) { 4337 pr_err("mtu of %llu is not supported. Reverting.\n", 4338 *req_value); 4339 *req_value = adapter->fallback.mtu; 4340 } else { 4341 *req_value = 4342 be64_to_cpu(crq->request_capability_rsp.number); 4343 } 4344 4345 send_request_cap(adapter, 1); 4346 return; 4347 default: 4348 dev_err(dev, "Error %d in request cap rsp\n", 4349 crq->request_capability_rsp.rc.code); 4350 return; 4351 } 4352 4353 /* Done receiving requested capabilities, query IP offload support */ 4354 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4355 adapter->wait_capability = false; 4356 send_query_ip_offload(adapter); 4357 } 4358 } 4359 4360 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4361 struct ibmvnic_adapter *adapter) 4362 { 4363 struct device *dev = &adapter->vdev->dev; 4364 struct net_device *netdev = adapter->netdev; 4365 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4366 struct ibmvnic_login_buffer *login = adapter->login_buf; 4367 u64 *tx_handle_array; 4368 u64 *rx_handle_array; 4369 int num_tx_pools; 4370 int num_rx_pools; 4371 u64 *size_array; 4372 int i; 4373 4374 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4375 DMA_TO_DEVICE); 4376 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4377 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4378 4379 /* If the number of queues requested can't be allocated by the 4380 * server, the login response will return with code 1. We will need 4381 * to resend the login buffer with fewer queues requested. 4382 */ 4383 if (login_rsp_crq->generic.rc.code) { 4384 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4385 complete(&adapter->init_done); 4386 return 0; 4387 } 4388 4389 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4390 4391 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4392 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4393 netdev_dbg(adapter->netdev, "%016lx\n", 4394 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4395 } 4396 4397 /* Sanity checks */ 4398 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4399 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4400 adapter->req_rx_add_queues != 4401 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4402 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4403 ibmvnic_remove(adapter->vdev); 4404 return -EIO; 4405 } 4406 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4407 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 4408 /* variable buffer sizes are not supported, so just read the 4409 * first entry. 4410 */ 4411 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 4412 4413 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 4414 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4415 4416 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4417 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 4418 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 4419 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 4420 4421 for (i = 0; i < num_tx_pools; i++) 4422 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 4423 4424 for (i = 0; i < num_rx_pools; i++) 4425 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 4426 4427 adapter->num_active_tx_scrqs = num_tx_pools; 4428 adapter->num_active_rx_scrqs = num_rx_pools; 4429 release_login_rsp_buffer(adapter); 4430 release_login_buffer(adapter); 4431 complete(&adapter->init_done); 4432 4433 return 0; 4434 } 4435 4436 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4437 struct ibmvnic_adapter *adapter) 4438 { 4439 struct device *dev = &adapter->vdev->dev; 4440 long rc; 4441 4442 rc = crq->request_unmap_rsp.rc.code; 4443 if (rc) 4444 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4445 } 4446 4447 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4448 struct ibmvnic_adapter *adapter) 4449 { 4450 struct net_device *netdev = adapter->netdev; 4451 struct device *dev = &adapter->vdev->dev; 4452 long rc; 4453 4454 rc = crq->query_map_rsp.rc.code; 4455 if (rc) { 4456 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4457 return; 4458 } 4459 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4460 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4461 crq->query_map_rsp.free_pages); 4462 } 4463 4464 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4465 struct ibmvnic_adapter *adapter) 4466 { 4467 struct net_device *netdev = adapter->netdev; 4468 struct device *dev = &adapter->vdev->dev; 4469 long rc; 4470 4471 atomic_dec(&adapter->running_cap_crqs); 4472 netdev_dbg(netdev, "Outstanding queries: %d\n", 4473 atomic_read(&adapter->running_cap_crqs)); 4474 rc = crq->query_capability.rc.code; 4475 if (rc) { 4476 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4477 goto out; 4478 } 4479 4480 switch (be16_to_cpu(crq->query_capability.capability)) { 4481 case MIN_TX_QUEUES: 4482 adapter->min_tx_queues = 4483 be64_to_cpu(crq->query_capability.number); 4484 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4485 adapter->min_tx_queues); 4486 break; 4487 case MIN_RX_QUEUES: 4488 adapter->min_rx_queues = 4489 be64_to_cpu(crq->query_capability.number); 4490 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4491 adapter->min_rx_queues); 4492 break; 4493 case MIN_RX_ADD_QUEUES: 4494 adapter->min_rx_add_queues = 4495 be64_to_cpu(crq->query_capability.number); 4496 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4497 adapter->min_rx_add_queues); 4498 break; 4499 case MAX_TX_QUEUES: 4500 adapter->max_tx_queues = 4501 be64_to_cpu(crq->query_capability.number); 4502 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4503 adapter->max_tx_queues); 4504 break; 4505 case MAX_RX_QUEUES: 4506 adapter->max_rx_queues = 4507 be64_to_cpu(crq->query_capability.number); 4508 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4509 adapter->max_rx_queues); 4510 break; 4511 case MAX_RX_ADD_QUEUES: 4512 adapter->max_rx_add_queues = 4513 be64_to_cpu(crq->query_capability.number); 4514 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4515 adapter->max_rx_add_queues); 4516 break; 4517 case MIN_TX_ENTRIES_PER_SUBCRQ: 4518 adapter->min_tx_entries_per_subcrq = 4519 be64_to_cpu(crq->query_capability.number); 4520 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4521 adapter->min_tx_entries_per_subcrq); 4522 break; 4523 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4524 adapter->min_rx_add_entries_per_subcrq = 4525 be64_to_cpu(crq->query_capability.number); 4526 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4527 adapter->min_rx_add_entries_per_subcrq); 4528 break; 4529 case MAX_TX_ENTRIES_PER_SUBCRQ: 4530 adapter->max_tx_entries_per_subcrq = 4531 be64_to_cpu(crq->query_capability.number); 4532 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4533 adapter->max_tx_entries_per_subcrq); 4534 break; 4535 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4536 adapter->max_rx_add_entries_per_subcrq = 4537 be64_to_cpu(crq->query_capability.number); 4538 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4539 adapter->max_rx_add_entries_per_subcrq); 4540 break; 4541 case TCP_IP_OFFLOAD: 4542 adapter->tcp_ip_offload = 4543 be64_to_cpu(crq->query_capability.number); 4544 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4545 adapter->tcp_ip_offload); 4546 break; 4547 case PROMISC_SUPPORTED: 4548 adapter->promisc_supported = 4549 be64_to_cpu(crq->query_capability.number); 4550 netdev_dbg(netdev, "promisc_supported = %lld\n", 4551 adapter->promisc_supported); 4552 break; 4553 case MIN_MTU: 4554 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4555 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4556 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4557 break; 4558 case MAX_MTU: 4559 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4560 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4561 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4562 break; 4563 case MAX_MULTICAST_FILTERS: 4564 adapter->max_multicast_filters = 4565 be64_to_cpu(crq->query_capability.number); 4566 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4567 adapter->max_multicast_filters); 4568 break; 4569 case VLAN_HEADER_INSERTION: 4570 adapter->vlan_header_insertion = 4571 be64_to_cpu(crq->query_capability.number); 4572 if (adapter->vlan_header_insertion) 4573 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4574 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4575 adapter->vlan_header_insertion); 4576 break; 4577 case RX_VLAN_HEADER_INSERTION: 4578 adapter->rx_vlan_header_insertion = 4579 be64_to_cpu(crq->query_capability.number); 4580 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4581 adapter->rx_vlan_header_insertion); 4582 break; 4583 case MAX_TX_SG_ENTRIES: 4584 adapter->max_tx_sg_entries = 4585 be64_to_cpu(crq->query_capability.number); 4586 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4587 adapter->max_tx_sg_entries); 4588 break; 4589 case RX_SG_SUPPORTED: 4590 adapter->rx_sg_supported = 4591 be64_to_cpu(crq->query_capability.number); 4592 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4593 adapter->rx_sg_supported); 4594 break; 4595 case OPT_TX_COMP_SUB_QUEUES: 4596 adapter->opt_tx_comp_sub_queues = 4597 be64_to_cpu(crq->query_capability.number); 4598 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4599 adapter->opt_tx_comp_sub_queues); 4600 break; 4601 case OPT_RX_COMP_QUEUES: 4602 adapter->opt_rx_comp_queues = 4603 be64_to_cpu(crq->query_capability.number); 4604 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4605 adapter->opt_rx_comp_queues); 4606 break; 4607 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4608 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4609 be64_to_cpu(crq->query_capability.number); 4610 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4611 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4612 break; 4613 case OPT_TX_ENTRIES_PER_SUBCRQ: 4614 adapter->opt_tx_entries_per_subcrq = 4615 be64_to_cpu(crq->query_capability.number); 4616 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4617 adapter->opt_tx_entries_per_subcrq); 4618 break; 4619 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4620 adapter->opt_rxba_entries_per_subcrq = 4621 be64_to_cpu(crq->query_capability.number); 4622 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4623 adapter->opt_rxba_entries_per_subcrq); 4624 break; 4625 case TX_RX_DESC_REQ: 4626 adapter->tx_rx_desc_req = crq->query_capability.number; 4627 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4628 adapter->tx_rx_desc_req); 4629 break; 4630 4631 default: 4632 netdev_err(netdev, "Got invalid cap rsp %d\n", 4633 crq->query_capability.capability); 4634 } 4635 4636 out: 4637 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4638 adapter->wait_capability = false; 4639 send_request_cap(adapter, 0); 4640 } 4641 } 4642 4643 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4644 { 4645 union ibmvnic_crq crq; 4646 int rc; 4647 4648 memset(&crq, 0, sizeof(crq)); 4649 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4650 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4651 4652 mutex_lock(&adapter->fw_lock); 4653 adapter->fw_done_rc = 0; 4654 reinit_completion(&adapter->fw_done); 4655 4656 rc = ibmvnic_send_crq(adapter, &crq); 4657 if (rc) { 4658 mutex_unlock(&adapter->fw_lock); 4659 return rc; 4660 } 4661 4662 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4663 if (rc) { 4664 mutex_unlock(&adapter->fw_lock); 4665 return rc; 4666 } 4667 4668 mutex_unlock(&adapter->fw_lock); 4669 return adapter->fw_done_rc ? -EIO : 0; 4670 } 4671 4672 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4673 struct ibmvnic_adapter *adapter) 4674 { 4675 struct net_device *netdev = adapter->netdev; 4676 int rc; 4677 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4678 4679 rc = crq->query_phys_parms_rsp.rc.code; 4680 if (rc) { 4681 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4682 return rc; 4683 } 4684 switch (rspeed) { 4685 case IBMVNIC_10MBPS: 4686 adapter->speed = SPEED_10; 4687 break; 4688 case IBMVNIC_100MBPS: 4689 adapter->speed = SPEED_100; 4690 break; 4691 case IBMVNIC_1GBPS: 4692 adapter->speed = SPEED_1000; 4693 break; 4694 case IBMVNIC_10GBPS: 4695 adapter->speed = SPEED_10000; 4696 break; 4697 case IBMVNIC_25GBPS: 4698 adapter->speed = SPEED_25000; 4699 break; 4700 case IBMVNIC_40GBPS: 4701 adapter->speed = SPEED_40000; 4702 break; 4703 case IBMVNIC_50GBPS: 4704 adapter->speed = SPEED_50000; 4705 break; 4706 case IBMVNIC_100GBPS: 4707 adapter->speed = SPEED_100000; 4708 break; 4709 case IBMVNIC_200GBPS: 4710 adapter->speed = SPEED_200000; 4711 break; 4712 default: 4713 if (netif_carrier_ok(netdev)) 4714 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4715 adapter->speed = SPEED_UNKNOWN; 4716 } 4717 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4718 adapter->duplex = DUPLEX_FULL; 4719 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4720 adapter->duplex = DUPLEX_HALF; 4721 else 4722 adapter->duplex = DUPLEX_UNKNOWN; 4723 4724 return rc; 4725 } 4726 4727 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4728 struct ibmvnic_adapter *adapter) 4729 { 4730 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4731 struct net_device *netdev = adapter->netdev; 4732 struct device *dev = &adapter->vdev->dev; 4733 u64 *u64_crq = (u64 *)crq; 4734 long rc; 4735 4736 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4737 (unsigned long int)cpu_to_be64(u64_crq[0]), 4738 (unsigned long int)cpu_to_be64(u64_crq[1])); 4739 switch (gen_crq->first) { 4740 case IBMVNIC_CRQ_INIT_RSP: 4741 switch (gen_crq->cmd) { 4742 case IBMVNIC_CRQ_INIT: 4743 dev_info(dev, "Partner initialized\n"); 4744 adapter->from_passive_init = true; 4745 if (!completion_done(&adapter->init_done)) { 4746 complete(&adapter->init_done); 4747 adapter->init_done_rc = -EIO; 4748 } 4749 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4750 break; 4751 case IBMVNIC_CRQ_INIT_COMPLETE: 4752 dev_info(dev, "Partner initialization complete\n"); 4753 adapter->crq.active = true; 4754 send_version_xchg(adapter); 4755 break; 4756 default: 4757 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4758 } 4759 return; 4760 case IBMVNIC_CRQ_XPORT_EVENT: 4761 netif_carrier_off(netdev); 4762 adapter->crq.active = false; 4763 /* terminate any thread waiting for a response 4764 * from the device 4765 */ 4766 if (!completion_done(&adapter->fw_done)) { 4767 adapter->fw_done_rc = -EIO; 4768 complete(&adapter->fw_done); 4769 } 4770 if (!completion_done(&adapter->stats_done)) 4771 complete(&adapter->stats_done); 4772 if (test_bit(0, &adapter->resetting)) 4773 adapter->force_reset_recovery = true; 4774 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4775 dev_info(dev, "Migrated, re-enabling adapter\n"); 4776 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4777 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4778 dev_info(dev, "Backing device failover detected\n"); 4779 adapter->failover_pending = true; 4780 } else { 4781 /* The adapter lost the connection */ 4782 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4783 gen_crq->cmd); 4784 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4785 } 4786 return; 4787 case IBMVNIC_CRQ_CMD_RSP: 4788 break; 4789 default: 4790 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4791 gen_crq->first); 4792 return; 4793 } 4794 4795 switch (gen_crq->cmd) { 4796 case VERSION_EXCHANGE_RSP: 4797 rc = crq->version_exchange_rsp.rc.code; 4798 if (rc) { 4799 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4800 break; 4801 } 4802 ibmvnic_version = 4803 be16_to_cpu(crq->version_exchange_rsp.version); 4804 dev_info(dev, "Partner protocol version is %d\n", 4805 ibmvnic_version); 4806 send_query_cap(adapter); 4807 break; 4808 case QUERY_CAPABILITY_RSP: 4809 handle_query_cap_rsp(crq, adapter); 4810 break; 4811 case QUERY_MAP_RSP: 4812 handle_query_map_rsp(crq, adapter); 4813 break; 4814 case REQUEST_MAP_RSP: 4815 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4816 complete(&adapter->fw_done); 4817 break; 4818 case REQUEST_UNMAP_RSP: 4819 handle_request_unmap_rsp(crq, adapter); 4820 break; 4821 case REQUEST_CAPABILITY_RSP: 4822 handle_request_cap_rsp(crq, adapter); 4823 break; 4824 case LOGIN_RSP: 4825 netdev_dbg(netdev, "Got Login Response\n"); 4826 handle_login_rsp(crq, adapter); 4827 break; 4828 case LOGICAL_LINK_STATE_RSP: 4829 netdev_dbg(netdev, 4830 "Got Logical Link State Response, state: %d rc: %d\n", 4831 crq->logical_link_state_rsp.link_state, 4832 crq->logical_link_state_rsp.rc.code); 4833 adapter->logical_link_state = 4834 crq->logical_link_state_rsp.link_state; 4835 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4836 complete(&adapter->init_done); 4837 break; 4838 case LINK_STATE_INDICATION: 4839 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4840 adapter->phys_link_state = 4841 crq->link_state_indication.phys_link_state; 4842 adapter->logical_link_state = 4843 crq->link_state_indication.logical_link_state; 4844 if (adapter->phys_link_state && adapter->logical_link_state) 4845 netif_carrier_on(netdev); 4846 else 4847 netif_carrier_off(netdev); 4848 break; 4849 case CHANGE_MAC_ADDR_RSP: 4850 netdev_dbg(netdev, "Got MAC address change Response\n"); 4851 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4852 break; 4853 case ERROR_INDICATION: 4854 netdev_dbg(netdev, "Got Error Indication\n"); 4855 handle_error_indication(crq, adapter); 4856 break; 4857 case REQUEST_STATISTICS_RSP: 4858 netdev_dbg(netdev, "Got Statistics Response\n"); 4859 complete(&adapter->stats_done); 4860 break; 4861 case QUERY_IP_OFFLOAD_RSP: 4862 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4863 handle_query_ip_offload_rsp(adapter); 4864 break; 4865 case MULTICAST_CTRL_RSP: 4866 netdev_dbg(netdev, "Got multicast control Response\n"); 4867 break; 4868 case CONTROL_IP_OFFLOAD_RSP: 4869 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4870 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4871 sizeof(adapter->ip_offload_ctrl), 4872 DMA_TO_DEVICE); 4873 complete(&adapter->init_done); 4874 break; 4875 case COLLECT_FW_TRACE_RSP: 4876 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4877 complete(&adapter->fw_done); 4878 break; 4879 case GET_VPD_SIZE_RSP: 4880 handle_vpd_size_rsp(crq, adapter); 4881 break; 4882 case GET_VPD_RSP: 4883 handle_vpd_rsp(crq, adapter); 4884 break; 4885 case QUERY_PHYS_PARMS_RSP: 4886 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4887 complete(&adapter->fw_done); 4888 break; 4889 default: 4890 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4891 gen_crq->cmd); 4892 } 4893 } 4894 4895 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4896 { 4897 struct ibmvnic_adapter *adapter = instance; 4898 4899 tasklet_schedule(&adapter->tasklet); 4900 return IRQ_HANDLED; 4901 } 4902 4903 static void ibmvnic_tasklet(struct tasklet_struct *t) 4904 { 4905 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 4906 struct ibmvnic_crq_queue *queue = &adapter->crq; 4907 union ibmvnic_crq *crq; 4908 unsigned long flags; 4909 bool done = false; 4910 4911 spin_lock_irqsave(&queue->lock, flags); 4912 while (!done) { 4913 /* Pull all the valid messages off the CRQ */ 4914 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4915 ibmvnic_handle_crq(crq, adapter); 4916 crq->generic.first = 0; 4917 } 4918 4919 /* remain in tasklet until all 4920 * capabilities responses are received 4921 */ 4922 if (!adapter->wait_capability) 4923 done = true; 4924 } 4925 /* if capabilities CRQ's were sent in this tasklet, the following 4926 * tasklet must wait until all responses are received 4927 */ 4928 if (atomic_read(&adapter->running_cap_crqs) != 0) 4929 adapter->wait_capability = true; 4930 spin_unlock_irqrestore(&queue->lock, flags); 4931 } 4932 4933 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4934 { 4935 struct vio_dev *vdev = adapter->vdev; 4936 int rc; 4937 4938 do { 4939 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4940 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4941 4942 if (rc) 4943 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4944 4945 return rc; 4946 } 4947 4948 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4949 { 4950 struct ibmvnic_crq_queue *crq = &adapter->crq; 4951 struct device *dev = &adapter->vdev->dev; 4952 struct vio_dev *vdev = adapter->vdev; 4953 int rc; 4954 4955 /* Close the CRQ */ 4956 do { 4957 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4958 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4959 4960 /* Clean out the queue */ 4961 memset(crq->msgs, 0, PAGE_SIZE); 4962 crq->cur = 0; 4963 crq->active = false; 4964 4965 /* And re-open it again */ 4966 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4967 crq->msg_token, PAGE_SIZE); 4968 4969 if (rc == H_CLOSED) 4970 /* Adapter is good, but other end is not ready */ 4971 dev_warn(dev, "Partner adapter not ready\n"); 4972 else if (rc != 0) 4973 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4974 4975 return rc; 4976 } 4977 4978 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4979 { 4980 struct ibmvnic_crq_queue *crq = &adapter->crq; 4981 struct vio_dev *vdev = adapter->vdev; 4982 long rc; 4983 4984 if (!crq->msgs) 4985 return; 4986 4987 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4988 free_irq(vdev->irq, adapter); 4989 tasklet_kill(&adapter->tasklet); 4990 do { 4991 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4992 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4993 4994 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4995 DMA_BIDIRECTIONAL); 4996 free_page((unsigned long)crq->msgs); 4997 crq->msgs = NULL; 4998 crq->active = false; 4999 } 5000 5001 static int init_crq_queue(struct ibmvnic_adapter *adapter) 5002 { 5003 struct ibmvnic_crq_queue *crq = &adapter->crq; 5004 struct device *dev = &adapter->vdev->dev; 5005 struct vio_dev *vdev = adapter->vdev; 5006 int rc, retrc = -ENOMEM; 5007 5008 if (crq->msgs) 5009 return 0; 5010 5011 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 5012 /* Should we allocate more than one page? */ 5013 5014 if (!crq->msgs) 5015 return -ENOMEM; 5016 5017 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 5018 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 5019 DMA_BIDIRECTIONAL); 5020 if (dma_mapping_error(dev, crq->msg_token)) 5021 goto map_failed; 5022 5023 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 5024 crq->msg_token, PAGE_SIZE); 5025 5026 if (rc == H_RESOURCE) 5027 /* maybe kexecing and resource is busy. try a reset */ 5028 rc = ibmvnic_reset_crq(adapter); 5029 retrc = rc; 5030 5031 if (rc == H_CLOSED) { 5032 dev_warn(dev, "Partner adapter not ready\n"); 5033 } else if (rc) { 5034 dev_warn(dev, "Error %d opening adapter\n", rc); 5035 goto reg_crq_failed; 5036 } 5037 5038 retrc = 0; 5039 5040 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 5041 5042 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 5043 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 5044 adapter->vdev->unit_address); 5045 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 5046 if (rc) { 5047 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 5048 vdev->irq, rc); 5049 goto req_irq_failed; 5050 } 5051 5052 rc = vio_enable_interrupts(vdev); 5053 if (rc) { 5054 dev_err(dev, "Error %d enabling interrupts\n", rc); 5055 goto req_irq_failed; 5056 } 5057 5058 crq->cur = 0; 5059 spin_lock_init(&crq->lock); 5060 5061 return retrc; 5062 5063 req_irq_failed: 5064 tasklet_kill(&adapter->tasklet); 5065 do { 5066 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 5067 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 5068 reg_crq_failed: 5069 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 5070 map_failed: 5071 free_page((unsigned long)crq->msgs); 5072 crq->msgs = NULL; 5073 return retrc; 5074 } 5075 5076 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 5077 { 5078 struct device *dev = &adapter->vdev->dev; 5079 unsigned long timeout = msecs_to_jiffies(30000); 5080 u64 old_num_rx_queues, old_num_tx_queues; 5081 int rc; 5082 5083 adapter->from_passive_init = false; 5084 5085 if (reset) { 5086 old_num_rx_queues = adapter->req_rx_queues; 5087 old_num_tx_queues = adapter->req_tx_queues; 5088 reinit_completion(&adapter->init_done); 5089 } 5090 5091 adapter->init_done_rc = 0; 5092 rc = ibmvnic_send_crq_init(adapter); 5093 if (rc) { 5094 dev_err(dev, "Send crq init failed with error %d\n", rc); 5095 return rc; 5096 } 5097 5098 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5099 dev_err(dev, "Initialization sequence timed out\n"); 5100 return -1; 5101 } 5102 5103 if (adapter->init_done_rc) { 5104 release_crq_queue(adapter); 5105 return adapter->init_done_rc; 5106 } 5107 5108 if (adapter->from_passive_init) { 5109 adapter->state = VNIC_OPEN; 5110 adapter->from_passive_init = false; 5111 return -1; 5112 } 5113 5114 if (reset && 5115 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5116 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5117 if (adapter->req_rx_queues != old_num_rx_queues || 5118 adapter->req_tx_queues != old_num_tx_queues) { 5119 release_sub_crqs(adapter, 0); 5120 rc = init_sub_crqs(adapter); 5121 } else { 5122 rc = reset_sub_crq_queues(adapter); 5123 } 5124 } else { 5125 rc = init_sub_crqs(adapter); 5126 } 5127 5128 if (rc) { 5129 dev_err(dev, "Initialization of sub crqs failed\n"); 5130 release_crq_queue(adapter); 5131 return rc; 5132 } 5133 5134 rc = init_sub_crq_irqs(adapter); 5135 if (rc) { 5136 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5137 release_crq_queue(adapter); 5138 } 5139 5140 return rc; 5141 } 5142 5143 static struct device_attribute dev_attr_failover; 5144 5145 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5146 { 5147 struct ibmvnic_adapter *adapter; 5148 struct net_device *netdev; 5149 unsigned char *mac_addr_p; 5150 int rc; 5151 5152 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5153 dev->unit_address); 5154 5155 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5156 VETH_MAC_ADDR, NULL); 5157 if (!mac_addr_p) { 5158 dev_err(&dev->dev, 5159 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5160 __FILE__, __LINE__); 5161 return 0; 5162 } 5163 5164 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5165 IBMVNIC_MAX_QUEUES); 5166 if (!netdev) 5167 return -ENOMEM; 5168 5169 adapter = netdev_priv(netdev); 5170 adapter->state = VNIC_PROBING; 5171 dev_set_drvdata(&dev->dev, netdev); 5172 adapter->vdev = dev; 5173 adapter->netdev = netdev; 5174 5175 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5176 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5177 netdev->irq = dev->irq; 5178 netdev->netdev_ops = &ibmvnic_netdev_ops; 5179 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5180 SET_NETDEV_DEV(netdev, &dev->dev); 5181 5182 spin_lock_init(&adapter->stats_lock); 5183 5184 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5185 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5186 __ibmvnic_delayed_reset); 5187 INIT_LIST_HEAD(&adapter->rwi_list); 5188 spin_lock_init(&adapter->rwi_lock); 5189 spin_lock_init(&adapter->state_lock); 5190 mutex_init(&adapter->fw_lock); 5191 init_completion(&adapter->init_done); 5192 init_completion(&adapter->fw_done); 5193 init_completion(&adapter->reset_done); 5194 init_completion(&adapter->stats_done); 5195 clear_bit(0, &adapter->resetting); 5196 5197 do { 5198 rc = init_crq_queue(adapter); 5199 if (rc) { 5200 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5201 rc); 5202 goto ibmvnic_init_fail; 5203 } 5204 5205 rc = ibmvnic_reset_init(adapter, false); 5206 if (rc && rc != EAGAIN) 5207 goto ibmvnic_init_fail; 5208 } while (rc == EAGAIN); 5209 5210 rc = init_stats_buffers(adapter); 5211 if (rc) 5212 goto ibmvnic_init_fail; 5213 5214 rc = init_stats_token(adapter); 5215 if (rc) 5216 goto ibmvnic_stats_fail; 5217 5218 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5219 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5220 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5221 5222 rc = device_create_file(&dev->dev, &dev_attr_failover); 5223 if (rc) 5224 goto ibmvnic_dev_file_err; 5225 5226 netif_carrier_off(netdev); 5227 rc = register_netdev(netdev); 5228 if (rc) { 5229 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5230 goto ibmvnic_register_fail; 5231 } 5232 dev_info(&dev->dev, "ibmvnic registered\n"); 5233 5234 adapter->state = VNIC_PROBED; 5235 5236 adapter->wait_for_reset = false; 5237 5238 return 0; 5239 5240 ibmvnic_register_fail: 5241 device_remove_file(&dev->dev, &dev_attr_failover); 5242 5243 ibmvnic_dev_file_err: 5244 release_stats_token(adapter); 5245 5246 ibmvnic_stats_fail: 5247 release_stats_buffers(adapter); 5248 5249 ibmvnic_init_fail: 5250 release_sub_crqs(adapter, 1); 5251 release_crq_queue(adapter); 5252 mutex_destroy(&adapter->fw_lock); 5253 free_netdev(netdev); 5254 5255 return rc; 5256 } 5257 5258 static int ibmvnic_remove(struct vio_dev *dev) 5259 { 5260 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5261 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5262 unsigned long flags; 5263 5264 spin_lock_irqsave(&adapter->state_lock, flags); 5265 if (adapter->state == VNIC_RESETTING) { 5266 spin_unlock_irqrestore(&adapter->state_lock, flags); 5267 return -EBUSY; 5268 } 5269 5270 adapter->state = VNIC_REMOVING; 5271 spin_unlock_irqrestore(&adapter->state_lock, flags); 5272 5273 flush_work(&adapter->ibmvnic_reset); 5274 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5275 5276 rtnl_lock(); 5277 unregister_netdevice(netdev); 5278 5279 release_resources(adapter); 5280 release_sub_crqs(adapter, 1); 5281 release_crq_queue(adapter); 5282 5283 release_stats_token(adapter); 5284 release_stats_buffers(adapter); 5285 5286 adapter->state = VNIC_REMOVED; 5287 5288 rtnl_unlock(); 5289 mutex_destroy(&adapter->fw_lock); 5290 device_remove_file(&dev->dev, &dev_attr_failover); 5291 free_netdev(netdev); 5292 dev_set_drvdata(&dev->dev, NULL); 5293 5294 return 0; 5295 } 5296 5297 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5298 const char *buf, size_t count) 5299 { 5300 struct net_device *netdev = dev_get_drvdata(dev); 5301 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5302 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5303 __be64 session_token; 5304 long rc; 5305 5306 if (!sysfs_streq(buf, "1")) 5307 return -EINVAL; 5308 5309 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5310 H_GET_SESSION_TOKEN, 0, 0, 0); 5311 if (rc) { 5312 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5313 rc); 5314 return -EINVAL; 5315 } 5316 5317 session_token = (__be64)retbuf[0]; 5318 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5319 be64_to_cpu(session_token)); 5320 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5321 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5322 if (rc) { 5323 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5324 rc); 5325 return -EINVAL; 5326 } 5327 5328 return count; 5329 } 5330 5331 static DEVICE_ATTR_WO(failover); 5332 5333 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5334 { 5335 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5336 struct ibmvnic_adapter *adapter; 5337 struct iommu_table *tbl; 5338 unsigned long ret = 0; 5339 int i; 5340 5341 tbl = get_iommu_table_base(&vdev->dev); 5342 5343 /* netdev inits at probe time along with the structures we need below*/ 5344 if (!netdev) 5345 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5346 5347 adapter = netdev_priv(netdev); 5348 5349 ret += PAGE_SIZE; /* the crq message queue */ 5350 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5351 5352 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5353 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5354 5355 for (i = 0; i < adapter->num_active_rx_pools; i++) 5356 ret += adapter->rx_pool[i].size * 5357 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5358 5359 return ret; 5360 } 5361 5362 static int ibmvnic_resume(struct device *dev) 5363 { 5364 struct net_device *netdev = dev_get_drvdata(dev); 5365 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5366 5367 if (adapter->state != VNIC_OPEN) 5368 return 0; 5369 5370 tasklet_schedule(&adapter->tasklet); 5371 5372 return 0; 5373 } 5374 5375 static const struct vio_device_id ibmvnic_device_table[] = { 5376 {"network", "IBM,vnic"}, 5377 {"", "" } 5378 }; 5379 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5380 5381 static const struct dev_pm_ops ibmvnic_pm_ops = { 5382 .resume = ibmvnic_resume 5383 }; 5384 5385 static struct vio_driver ibmvnic_driver = { 5386 .id_table = ibmvnic_device_table, 5387 .probe = ibmvnic_probe, 5388 .remove = ibmvnic_remove, 5389 .get_desired_dma = ibmvnic_get_desired_dma, 5390 .name = ibmvnic_driver_name, 5391 .pm = &ibmvnic_pm_ops, 5392 }; 5393 5394 /* module functions */ 5395 static int __init ibmvnic_module_init(void) 5396 { 5397 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5398 IBMVNIC_DRIVER_VERSION); 5399 5400 return vio_register_driver(&ibmvnic_driver); 5401 } 5402 5403 static void __exit ibmvnic_module_exit(void) 5404 { 5405 vio_unregister_driver(&ibmvnic_driver); 5406 } 5407 5408 module_init(ibmvnic_module_init); 5409 module_exit(ibmvnic_module_exit); 5410