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