1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/kthread.h> 57 #include <linux/seq_file.h> 58 #include <linux/interrupt.h> 59 #include <net/net_namespace.h> 60 #include <asm/hvcall.h> 61 #include <linux/atomic.h> 62 #include <asm/vio.h> 63 #include <asm/iommu.h> 64 #include <linux/uaccess.h> 65 #include <asm/firmware.h> 66 #include <linux/workqueue.h> 67 #include <linux/if_vlan.h> 68 #include <linux/utsname.h> 69 70 #include "ibmvnic.h" 71 72 static const char ibmvnic_driver_name[] = "ibmvnic"; 73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 74 75 MODULE_AUTHOR("Santiago Leon"); 76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 77 MODULE_LICENSE("GPL"); 78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 79 80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 81 static int ibmvnic_remove(struct vio_dev *); 82 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 87 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 88 union sub_crq *sub_crq); 89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 91 static int enable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int disable_scrq_irq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static int pending_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 98 struct ibmvnic_sub_crq_queue *); 99 static int ibmvnic_poll(struct napi_struct *napi, int data); 100 static void send_map_query(struct ibmvnic_adapter *adapter); 101 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 102 static int send_request_unmap(struct ibmvnic_adapter *, u8); 103 static int send_login(struct ibmvnic_adapter *adapter); 104 static void send_cap_queries(struct ibmvnic_adapter *adapter); 105 static int init_sub_crqs(struct ibmvnic_adapter *); 106 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 107 static int ibmvnic_init(struct ibmvnic_adapter *); 108 static int ibmvnic_reset_init(struct ibmvnic_adapter *); 109 static void release_crq_queue(struct ibmvnic_adapter *); 110 static int __ibmvnic_set_mac(struct net_device *, u8 *); 111 static int init_crq_queue(struct ibmvnic_adapter *adapter); 112 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 113 114 struct ibmvnic_stat { 115 char name[ETH_GSTRING_LEN]; 116 int offset; 117 }; 118 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 120 offsetof(struct ibmvnic_statistics, stat)) 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 122 123 static const struct ibmvnic_stat ibmvnic_stats[] = { 124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 146 }; 147 148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 149 unsigned long length, unsigned long *number, 150 unsigned long *irq) 151 { 152 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 153 long rc; 154 155 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 156 *number = retbuf[0]; 157 *irq = retbuf[1]; 158 159 return rc; 160 } 161 162 /** 163 * ibmvnic_wait_for_completion - Check device state and wait for completion 164 * @adapter: private device data 165 * @comp_done: completion structure to wait for 166 * @timeout: time to wait in milliseconds 167 * 168 * Wait for a completion signal or until the timeout limit is reached 169 * while checking that the device is still active. 170 */ 171 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 172 struct completion *comp_done, 173 unsigned long timeout) 174 { 175 struct net_device *netdev; 176 unsigned long div_timeout; 177 u8 retry; 178 179 netdev = adapter->netdev; 180 retry = 5; 181 div_timeout = msecs_to_jiffies(timeout / retry); 182 while (true) { 183 if (!adapter->crq.active) { 184 netdev_err(netdev, "Device down!\n"); 185 return -ENODEV; 186 } 187 if (!retry--) 188 break; 189 if (wait_for_completion_timeout(comp_done, div_timeout)) 190 return 0; 191 } 192 netdev_err(netdev, "Operation timed out.\n"); 193 return -ETIMEDOUT; 194 } 195 196 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 197 struct ibmvnic_long_term_buff *ltb, int size) 198 { 199 struct device *dev = &adapter->vdev->dev; 200 int rc; 201 202 ltb->size = size; 203 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 204 GFP_KERNEL); 205 206 if (!ltb->buff) { 207 dev_err(dev, "Couldn't alloc long term buffer\n"); 208 return -ENOMEM; 209 } 210 ltb->map_id = adapter->map_id; 211 adapter->map_id++; 212 213 mutex_lock(&adapter->fw_lock); 214 adapter->fw_done_rc = 0; 215 reinit_completion(&adapter->fw_done); 216 rc = send_request_map(adapter, ltb->addr, 217 ltb->size, ltb->map_id); 218 if (rc) { 219 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 220 mutex_unlock(&adapter->fw_lock); 221 return rc; 222 } 223 224 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 225 if (rc) { 226 dev_err(dev, 227 "Long term map request aborted or timed out,rc = %d\n", 228 rc); 229 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 230 mutex_unlock(&adapter->fw_lock); 231 return rc; 232 } 233 234 if (adapter->fw_done_rc) { 235 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 236 adapter->fw_done_rc); 237 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 238 mutex_unlock(&adapter->fw_lock); 239 return -1; 240 } 241 mutex_unlock(&adapter->fw_lock); 242 return 0; 243 } 244 245 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 246 struct ibmvnic_long_term_buff *ltb) 247 { 248 struct device *dev = &adapter->vdev->dev; 249 250 if (!ltb->buff) 251 return; 252 253 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 254 adapter->reset_reason != VNIC_RESET_MOBILITY) 255 send_request_unmap(adapter, ltb->map_id); 256 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 257 } 258 259 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 260 struct ibmvnic_long_term_buff *ltb) 261 { 262 struct device *dev = &adapter->vdev->dev; 263 int rc; 264 265 memset(ltb->buff, 0, ltb->size); 266 267 mutex_lock(&adapter->fw_lock); 268 adapter->fw_done_rc = 0; 269 270 reinit_completion(&adapter->fw_done); 271 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 272 if (rc) { 273 mutex_unlock(&adapter->fw_lock); 274 return rc; 275 } 276 277 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 278 if (rc) { 279 dev_info(dev, 280 "Reset failed, long term map request timed out or aborted\n"); 281 mutex_unlock(&adapter->fw_lock); 282 return rc; 283 } 284 285 if (adapter->fw_done_rc) { 286 dev_info(dev, 287 "Reset failed, attempting to free and reallocate buffer\n"); 288 free_long_term_buff(adapter, ltb); 289 mutex_unlock(&adapter->fw_lock); 290 return alloc_long_term_buff(adapter, ltb, ltb->size); 291 } 292 mutex_unlock(&adapter->fw_lock); 293 return 0; 294 } 295 296 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 297 { 298 int i; 299 300 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 301 i++) 302 adapter->rx_pool[i].active = 0; 303 } 304 305 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 306 struct ibmvnic_rx_pool *pool) 307 { 308 int count = pool->size - atomic_read(&pool->available); 309 struct device *dev = &adapter->vdev->dev; 310 int buffers_added = 0; 311 unsigned long lpar_rc; 312 union sub_crq sub_crq; 313 struct sk_buff *skb; 314 unsigned int offset; 315 dma_addr_t dma_addr; 316 unsigned char *dst; 317 u64 *handle_array; 318 int shift = 0; 319 int index; 320 int i; 321 322 if (!pool->active) 323 return; 324 325 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 326 be32_to_cpu(adapter->login_rsp_buf-> 327 off_rxadd_subcrqs)); 328 329 for (i = 0; i < count; ++i) { 330 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 331 if (!skb) { 332 dev_err(dev, "Couldn't replenish rx buff\n"); 333 adapter->replenish_no_mem++; 334 break; 335 } 336 337 index = pool->free_map[pool->next_free]; 338 339 if (pool->rx_buff[index].skb) 340 dev_err(dev, "Inconsistent free_map!\n"); 341 342 /* Copy the skb to the long term mapped DMA buffer */ 343 offset = index * pool->buff_size; 344 dst = pool->long_term_buff.buff + offset; 345 memset(dst, 0, pool->buff_size); 346 dma_addr = pool->long_term_buff.addr + offset; 347 pool->rx_buff[index].data = dst; 348 349 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 350 pool->rx_buff[index].dma = dma_addr; 351 pool->rx_buff[index].skb = skb; 352 pool->rx_buff[index].pool_index = pool->index; 353 pool->rx_buff[index].size = pool->buff_size; 354 355 memset(&sub_crq, 0, sizeof(sub_crq)); 356 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 357 sub_crq.rx_add.correlator = 358 cpu_to_be64((u64)&pool->rx_buff[index]); 359 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 360 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 361 362 /* The length field of the sCRQ is defined to be 24 bits so the 363 * buffer size needs to be left shifted by a byte before it is 364 * converted to big endian to prevent the last byte from being 365 * truncated. 366 */ 367 #ifdef __LITTLE_ENDIAN__ 368 shift = 8; 369 #endif 370 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 371 372 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 373 &sub_crq); 374 if (lpar_rc != H_SUCCESS) 375 goto failure; 376 377 buffers_added++; 378 adapter->replenish_add_buff_success++; 379 pool->next_free = (pool->next_free + 1) % pool->size; 380 } 381 atomic_add(buffers_added, &pool->available); 382 return; 383 384 failure: 385 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 386 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 387 pool->free_map[pool->next_free] = index; 388 pool->rx_buff[index].skb = NULL; 389 390 dev_kfree_skb_any(skb); 391 adapter->replenish_add_buff_failure++; 392 atomic_add(buffers_added, &pool->available); 393 394 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 395 /* Disable buffer pool replenishment and report carrier off if 396 * queue is closed or pending failover. 397 * Firmware guarantees that a signal will be sent to the 398 * driver, triggering a reset. 399 */ 400 deactivate_rx_pools(adapter); 401 netif_carrier_off(adapter->netdev); 402 } 403 } 404 405 static void replenish_pools(struct ibmvnic_adapter *adapter) 406 { 407 int i; 408 409 adapter->replenish_task_cycles++; 410 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 411 i++) { 412 if (adapter->rx_pool[i].active) 413 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 414 } 415 } 416 417 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 418 { 419 kfree(adapter->tx_stats_buffers); 420 kfree(adapter->rx_stats_buffers); 421 adapter->tx_stats_buffers = NULL; 422 adapter->rx_stats_buffers = NULL; 423 } 424 425 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 426 { 427 adapter->tx_stats_buffers = 428 kcalloc(IBMVNIC_MAX_QUEUES, 429 sizeof(struct ibmvnic_tx_queue_stats), 430 GFP_KERNEL); 431 if (!adapter->tx_stats_buffers) 432 return -ENOMEM; 433 434 adapter->rx_stats_buffers = 435 kcalloc(IBMVNIC_MAX_QUEUES, 436 sizeof(struct ibmvnic_rx_queue_stats), 437 GFP_KERNEL); 438 if (!adapter->rx_stats_buffers) 439 return -ENOMEM; 440 441 return 0; 442 } 443 444 static void release_stats_token(struct ibmvnic_adapter *adapter) 445 { 446 struct device *dev = &adapter->vdev->dev; 447 448 if (!adapter->stats_token) 449 return; 450 451 dma_unmap_single(dev, adapter->stats_token, 452 sizeof(struct ibmvnic_statistics), 453 DMA_FROM_DEVICE); 454 adapter->stats_token = 0; 455 } 456 457 static int init_stats_token(struct ibmvnic_adapter *adapter) 458 { 459 struct device *dev = &adapter->vdev->dev; 460 dma_addr_t stok; 461 462 stok = dma_map_single(dev, &adapter->stats, 463 sizeof(struct ibmvnic_statistics), 464 DMA_FROM_DEVICE); 465 if (dma_mapping_error(dev, stok)) { 466 dev_err(dev, "Couldn't map stats buffer\n"); 467 return -1; 468 } 469 470 adapter->stats_token = stok; 471 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 472 return 0; 473 } 474 475 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 476 { 477 struct ibmvnic_rx_pool *rx_pool; 478 int rx_scrqs; 479 int i, j, rc; 480 u64 *size_array; 481 482 if (!adapter->rx_pool) 483 return -1; 484 485 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 486 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 487 488 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 489 for (i = 0; i < rx_scrqs; i++) { 490 rx_pool = &adapter->rx_pool[i]; 491 492 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 493 494 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) { 495 free_long_term_buff(adapter, &rx_pool->long_term_buff); 496 rx_pool->buff_size = be64_to_cpu(size_array[i]); 497 rc = alloc_long_term_buff(adapter, 498 &rx_pool->long_term_buff, 499 rx_pool->size * 500 rx_pool->buff_size); 501 } else { 502 rc = reset_long_term_buff(adapter, 503 &rx_pool->long_term_buff); 504 } 505 506 if (rc) 507 return rc; 508 509 for (j = 0; j < rx_pool->size; j++) 510 rx_pool->free_map[j] = j; 511 512 memset(rx_pool->rx_buff, 0, 513 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 514 515 atomic_set(&rx_pool->available, 0); 516 rx_pool->next_alloc = 0; 517 rx_pool->next_free = 0; 518 rx_pool->active = 1; 519 } 520 521 return 0; 522 } 523 524 static void release_rx_pools(struct ibmvnic_adapter *adapter) 525 { 526 struct ibmvnic_rx_pool *rx_pool; 527 int i, j; 528 529 if (!adapter->rx_pool) 530 return; 531 532 for (i = 0; i < adapter->num_active_rx_pools; i++) { 533 rx_pool = &adapter->rx_pool[i]; 534 535 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 536 537 kfree(rx_pool->free_map); 538 free_long_term_buff(adapter, &rx_pool->long_term_buff); 539 540 if (!rx_pool->rx_buff) 541 continue; 542 543 for (j = 0; j < rx_pool->size; j++) { 544 if (rx_pool->rx_buff[j].skb) { 545 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 546 rx_pool->rx_buff[j].skb = NULL; 547 } 548 } 549 550 kfree(rx_pool->rx_buff); 551 } 552 553 kfree(adapter->rx_pool); 554 adapter->rx_pool = NULL; 555 adapter->num_active_rx_pools = 0; 556 } 557 558 static int init_rx_pools(struct net_device *netdev) 559 { 560 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 561 struct device *dev = &adapter->vdev->dev; 562 struct ibmvnic_rx_pool *rx_pool; 563 int rxadd_subcrqs; 564 u64 *size_array; 565 int i, j; 566 567 rxadd_subcrqs = 568 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 569 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 570 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 571 572 adapter->rx_pool = kcalloc(rxadd_subcrqs, 573 sizeof(struct ibmvnic_rx_pool), 574 GFP_KERNEL); 575 if (!adapter->rx_pool) { 576 dev_err(dev, "Failed to allocate rx pools\n"); 577 return -1; 578 } 579 580 adapter->num_active_rx_pools = rxadd_subcrqs; 581 582 for (i = 0; i < rxadd_subcrqs; i++) { 583 rx_pool = &adapter->rx_pool[i]; 584 585 netdev_dbg(adapter->netdev, 586 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 587 i, adapter->req_rx_add_entries_per_subcrq, 588 be64_to_cpu(size_array[i])); 589 590 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 591 rx_pool->index = i; 592 rx_pool->buff_size = be64_to_cpu(size_array[i]); 593 rx_pool->active = 1; 594 595 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 596 GFP_KERNEL); 597 if (!rx_pool->free_map) { 598 release_rx_pools(adapter); 599 return -1; 600 } 601 602 rx_pool->rx_buff = kcalloc(rx_pool->size, 603 sizeof(struct ibmvnic_rx_buff), 604 GFP_KERNEL); 605 if (!rx_pool->rx_buff) { 606 dev_err(dev, "Couldn't alloc rx buffers\n"); 607 release_rx_pools(adapter); 608 return -1; 609 } 610 611 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 612 rx_pool->size * rx_pool->buff_size)) { 613 release_rx_pools(adapter); 614 return -1; 615 } 616 617 for (j = 0; j < rx_pool->size; ++j) 618 rx_pool->free_map[j] = j; 619 620 atomic_set(&rx_pool->available, 0); 621 rx_pool->next_alloc = 0; 622 rx_pool->next_free = 0; 623 } 624 625 return 0; 626 } 627 628 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 629 struct ibmvnic_tx_pool *tx_pool) 630 { 631 int rc, i; 632 633 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 634 if (rc) 635 return rc; 636 637 memset(tx_pool->tx_buff, 0, 638 tx_pool->num_buffers * 639 sizeof(struct ibmvnic_tx_buff)); 640 641 for (i = 0; i < tx_pool->num_buffers; i++) 642 tx_pool->free_map[i] = i; 643 644 tx_pool->consumer_index = 0; 645 tx_pool->producer_index = 0; 646 647 return 0; 648 } 649 650 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 651 { 652 int tx_scrqs; 653 int i, rc; 654 655 if (!adapter->tx_pool) 656 return -1; 657 658 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 659 for (i = 0; i < tx_scrqs; i++) { 660 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 661 if (rc) 662 return rc; 663 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 664 if (rc) 665 return rc; 666 } 667 668 return 0; 669 } 670 671 static void release_vpd_data(struct ibmvnic_adapter *adapter) 672 { 673 if (!adapter->vpd) 674 return; 675 676 kfree(adapter->vpd->buff); 677 kfree(adapter->vpd); 678 679 adapter->vpd = NULL; 680 } 681 682 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 683 struct ibmvnic_tx_pool *tx_pool) 684 { 685 kfree(tx_pool->tx_buff); 686 kfree(tx_pool->free_map); 687 free_long_term_buff(adapter, &tx_pool->long_term_buff); 688 } 689 690 static void release_tx_pools(struct ibmvnic_adapter *adapter) 691 { 692 int i; 693 694 if (!adapter->tx_pool) 695 return; 696 697 for (i = 0; i < adapter->num_active_tx_pools; i++) { 698 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 699 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 700 } 701 702 kfree(adapter->tx_pool); 703 adapter->tx_pool = NULL; 704 kfree(adapter->tso_pool); 705 adapter->tso_pool = NULL; 706 adapter->num_active_tx_pools = 0; 707 } 708 709 static int init_one_tx_pool(struct net_device *netdev, 710 struct ibmvnic_tx_pool *tx_pool, 711 int num_entries, int buf_size) 712 { 713 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 714 int i; 715 716 tx_pool->tx_buff = kcalloc(num_entries, 717 sizeof(struct ibmvnic_tx_buff), 718 GFP_KERNEL); 719 if (!tx_pool->tx_buff) 720 return -1; 721 722 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 723 num_entries * buf_size)) 724 return -1; 725 726 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 727 if (!tx_pool->free_map) 728 return -1; 729 730 for (i = 0; i < num_entries; i++) 731 tx_pool->free_map[i] = i; 732 733 tx_pool->consumer_index = 0; 734 tx_pool->producer_index = 0; 735 tx_pool->num_buffers = num_entries; 736 tx_pool->buf_size = buf_size; 737 738 return 0; 739 } 740 741 static int init_tx_pools(struct net_device *netdev) 742 { 743 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 744 int tx_subcrqs; 745 int i, rc; 746 747 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 748 adapter->tx_pool = kcalloc(tx_subcrqs, 749 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 750 if (!adapter->tx_pool) 751 return -1; 752 753 adapter->tso_pool = kcalloc(tx_subcrqs, 754 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 755 if (!adapter->tso_pool) 756 return -1; 757 758 adapter->num_active_tx_pools = tx_subcrqs; 759 760 for (i = 0; i < tx_subcrqs; i++) { 761 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 762 adapter->req_tx_entries_per_subcrq, 763 adapter->req_mtu + VLAN_HLEN); 764 if (rc) { 765 release_tx_pools(adapter); 766 return rc; 767 } 768 769 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 770 IBMVNIC_TSO_BUFS, 771 IBMVNIC_TSO_BUF_SZ); 772 if (rc) { 773 release_tx_pools(adapter); 774 return rc; 775 } 776 } 777 778 return 0; 779 } 780 781 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 782 { 783 int i; 784 785 if (adapter->napi_enabled) 786 return; 787 788 for (i = 0; i < adapter->req_rx_queues; i++) 789 napi_enable(&adapter->napi[i]); 790 791 adapter->napi_enabled = true; 792 } 793 794 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 795 { 796 int i; 797 798 if (!adapter->napi_enabled) 799 return; 800 801 for (i = 0; i < adapter->req_rx_queues; i++) { 802 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 803 napi_disable(&adapter->napi[i]); 804 } 805 806 adapter->napi_enabled = false; 807 } 808 809 static int init_napi(struct ibmvnic_adapter *adapter) 810 { 811 int i; 812 813 adapter->napi = kcalloc(adapter->req_rx_queues, 814 sizeof(struct napi_struct), GFP_KERNEL); 815 if (!adapter->napi) 816 return -ENOMEM; 817 818 for (i = 0; i < adapter->req_rx_queues; i++) { 819 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 820 netif_napi_add(adapter->netdev, &adapter->napi[i], 821 ibmvnic_poll, NAPI_POLL_WEIGHT); 822 } 823 824 adapter->num_active_rx_napi = adapter->req_rx_queues; 825 return 0; 826 } 827 828 static void release_napi(struct ibmvnic_adapter *adapter) 829 { 830 int i; 831 832 if (!adapter->napi) 833 return; 834 835 for (i = 0; i < adapter->num_active_rx_napi; i++) { 836 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 837 netif_napi_del(&adapter->napi[i]); 838 } 839 840 kfree(adapter->napi); 841 adapter->napi = NULL; 842 adapter->num_active_rx_napi = 0; 843 adapter->napi_enabled = false; 844 } 845 846 static int ibmvnic_login(struct net_device *netdev) 847 { 848 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 849 unsigned long timeout = msecs_to_jiffies(30000); 850 int retry_count = 0; 851 int retries = 10; 852 bool retry; 853 int rc; 854 855 do { 856 retry = false; 857 if (retry_count > retries) { 858 netdev_warn(netdev, "Login attempts exceeded\n"); 859 return -1; 860 } 861 862 adapter->init_done_rc = 0; 863 reinit_completion(&adapter->init_done); 864 rc = send_login(adapter); 865 if (rc) { 866 netdev_warn(netdev, "Unable to login\n"); 867 return rc; 868 } 869 870 if (!wait_for_completion_timeout(&adapter->init_done, 871 timeout)) { 872 netdev_warn(netdev, "Login timed out, retrying...\n"); 873 retry = true; 874 adapter->init_done_rc = 0; 875 retry_count++; 876 continue; 877 } 878 879 if (adapter->init_done_rc == ABORTED) { 880 netdev_warn(netdev, "Login aborted, retrying...\n"); 881 retry = true; 882 adapter->init_done_rc = 0; 883 retry_count++; 884 /* FW or device may be busy, so 885 * wait a bit before retrying login 886 */ 887 msleep(500); 888 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 889 retry_count++; 890 release_sub_crqs(adapter, 1); 891 892 retry = true; 893 netdev_dbg(netdev, 894 "Received partial success, retrying...\n"); 895 adapter->init_done_rc = 0; 896 reinit_completion(&adapter->init_done); 897 send_cap_queries(adapter); 898 if (!wait_for_completion_timeout(&adapter->init_done, 899 timeout)) { 900 netdev_warn(netdev, 901 "Capabilities query timed out\n"); 902 return -1; 903 } 904 905 rc = init_sub_crqs(adapter); 906 if (rc) { 907 netdev_warn(netdev, 908 "SCRQ initialization failed\n"); 909 return -1; 910 } 911 912 rc = init_sub_crq_irqs(adapter); 913 if (rc) { 914 netdev_warn(netdev, 915 "SCRQ irq initialization failed\n"); 916 return -1; 917 } 918 } else if (adapter->init_done_rc) { 919 netdev_warn(netdev, "Adapter login failed\n"); 920 return -1; 921 } 922 } while (retry); 923 924 __ibmvnic_set_mac(netdev, adapter->mac_addr); 925 926 return 0; 927 } 928 929 static void release_login_buffer(struct ibmvnic_adapter *adapter) 930 { 931 kfree(adapter->login_buf); 932 adapter->login_buf = NULL; 933 } 934 935 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 936 { 937 kfree(adapter->login_rsp_buf); 938 adapter->login_rsp_buf = NULL; 939 } 940 941 static void release_resources(struct ibmvnic_adapter *adapter) 942 { 943 release_vpd_data(adapter); 944 945 release_tx_pools(adapter); 946 release_rx_pools(adapter); 947 948 release_napi(adapter); 949 release_login_rsp_buffer(adapter); 950 } 951 952 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 953 { 954 struct net_device *netdev = adapter->netdev; 955 unsigned long timeout = msecs_to_jiffies(30000); 956 union ibmvnic_crq crq; 957 bool resend; 958 int rc; 959 960 netdev_dbg(netdev, "setting link state %d\n", link_state); 961 962 memset(&crq, 0, sizeof(crq)); 963 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 964 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 965 crq.logical_link_state.link_state = link_state; 966 967 do { 968 resend = false; 969 970 reinit_completion(&adapter->init_done); 971 rc = ibmvnic_send_crq(adapter, &crq); 972 if (rc) { 973 netdev_err(netdev, "Failed to set link state\n"); 974 return rc; 975 } 976 977 if (!wait_for_completion_timeout(&adapter->init_done, 978 timeout)) { 979 netdev_err(netdev, "timeout setting link state\n"); 980 return -1; 981 } 982 983 if (adapter->init_done_rc == 1) { 984 /* Partuial success, delay and re-send */ 985 mdelay(1000); 986 resend = true; 987 } else if (adapter->init_done_rc) { 988 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 989 adapter->init_done_rc); 990 return adapter->init_done_rc; 991 } 992 } while (resend); 993 994 return 0; 995 } 996 997 static int set_real_num_queues(struct net_device *netdev) 998 { 999 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1000 int rc; 1001 1002 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1003 adapter->req_tx_queues, adapter->req_rx_queues); 1004 1005 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1006 if (rc) { 1007 netdev_err(netdev, "failed to set the number of tx queues\n"); 1008 return rc; 1009 } 1010 1011 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1012 if (rc) 1013 netdev_err(netdev, "failed to set the number of rx queues\n"); 1014 1015 return rc; 1016 } 1017 1018 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1019 { 1020 struct device *dev = &adapter->vdev->dev; 1021 union ibmvnic_crq crq; 1022 int len = 0; 1023 int rc; 1024 1025 if (adapter->vpd->buff) 1026 len = adapter->vpd->len; 1027 1028 mutex_lock(&adapter->fw_lock); 1029 adapter->fw_done_rc = 0; 1030 reinit_completion(&adapter->fw_done); 1031 1032 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1033 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1034 rc = ibmvnic_send_crq(adapter, &crq); 1035 if (rc) { 1036 mutex_unlock(&adapter->fw_lock); 1037 return rc; 1038 } 1039 1040 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1041 if (rc) { 1042 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1043 mutex_unlock(&adapter->fw_lock); 1044 return rc; 1045 } 1046 mutex_unlock(&adapter->fw_lock); 1047 1048 if (!adapter->vpd->len) 1049 return -ENODATA; 1050 1051 if (!adapter->vpd->buff) 1052 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1053 else if (adapter->vpd->len != len) 1054 adapter->vpd->buff = 1055 krealloc(adapter->vpd->buff, 1056 adapter->vpd->len, GFP_KERNEL); 1057 1058 if (!adapter->vpd->buff) { 1059 dev_err(dev, "Could allocate VPD buffer\n"); 1060 return -ENOMEM; 1061 } 1062 1063 adapter->vpd->dma_addr = 1064 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1065 DMA_FROM_DEVICE); 1066 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1067 dev_err(dev, "Could not map VPD buffer\n"); 1068 kfree(adapter->vpd->buff); 1069 adapter->vpd->buff = NULL; 1070 return -ENOMEM; 1071 } 1072 1073 mutex_lock(&adapter->fw_lock); 1074 adapter->fw_done_rc = 0; 1075 reinit_completion(&adapter->fw_done); 1076 1077 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1078 crq.get_vpd.cmd = GET_VPD; 1079 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1080 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1081 rc = ibmvnic_send_crq(adapter, &crq); 1082 if (rc) { 1083 kfree(adapter->vpd->buff); 1084 adapter->vpd->buff = NULL; 1085 mutex_unlock(&adapter->fw_lock); 1086 return rc; 1087 } 1088 1089 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1090 if (rc) { 1091 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1092 kfree(adapter->vpd->buff); 1093 adapter->vpd->buff = NULL; 1094 mutex_unlock(&adapter->fw_lock); 1095 return rc; 1096 } 1097 1098 mutex_unlock(&adapter->fw_lock); 1099 return 0; 1100 } 1101 1102 static int init_resources(struct ibmvnic_adapter *adapter) 1103 { 1104 struct net_device *netdev = adapter->netdev; 1105 int rc; 1106 1107 rc = set_real_num_queues(netdev); 1108 if (rc) 1109 return rc; 1110 1111 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1112 if (!adapter->vpd) 1113 return -ENOMEM; 1114 1115 /* Vital Product Data (VPD) */ 1116 rc = ibmvnic_get_vpd(adapter); 1117 if (rc) { 1118 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1119 return rc; 1120 } 1121 1122 adapter->map_id = 1; 1123 1124 rc = init_napi(adapter); 1125 if (rc) 1126 return rc; 1127 1128 send_map_query(adapter); 1129 1130 rc = init_rx_pools(netdev); 1131 if (rc) 1132 return rc; 1133 1134 rc = init_tx_pools(netdev); 1135 return rc; 1136 } 1137 1138 static int __ibmvnic_open(struct net_device *netdev) 1139 { 1140 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1141 enum vnic_state prev_state = adapter->state; 1142 int i, rc; 1143 1144 adapter->state = VNIC_OPENING; 1145 replenish_pools(adapter); 1146 ibmvnic_napi_enable(adapter); 1147 1148 /* We're ready to receive frames, enable the sub-crq interrupts and 1149 * set the logical link state to up 1150 */ 1151 for (i = 0; i < adapter->req_rx_queues; i++) { 1152 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1153 if (prev_state == VNIC_CLOSED) 1154 enable_irq(adapter->rx_scrq[i]->irq); 1155 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1156 } 1157 1158 for (i = 0; i < adapter->req_tx_queues; i++) { 1159 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1160 if (prev_state == VNIC_CLOSED) 1161 enable_irq(adapter->tx_scrq[i]->irq); 1162 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1163 } 1164 1165 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1166 if (rc) { 1167 for (i = 0; i < adapter->req_rx_queues; i++) 1168 napi_disable(&adapter->napi[i]); 1169 release_resources(adapter); 1170 return rc; 1171 } 1172 1173 netif_tx_start_all_queues(netdev); 1174 1175 if (prev_state == VNIC_CLOSED) { 1176 for (i = 0; i < adapter->req_rx_queues; i++) 1177 napi_schedule(&adapter->napi[i]); 1178 } 1179 1180 adapter->state = VNIC_OPEN; 1181 return rc; 1182 } 1183 1184 static int ibmvnic_open(struct net_device *netdev) 1185 { 1186 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1187 int rc; 1188 1189 /* If device failover is pending, just set device state and return. 1190 * Device operation will be handled by reset routine. 1191 */ 1192 if (adapter->failover_pending) { 1193 adapter->state = VNIC_OPEN; 1194 return 0; 1195 } 1196 1197 if (adapter->state != VNIC_CLOSED) { 1198 rc = ibmvnic_login(netdev); 1199 if (rc) 1200 return rc; 1201 1202 rc = init_resources(adapter); 1203 if (rc) { 1204 netdev_err(netdev, "failed to initialize resources\n"); 1205 release_resources(adapter); 1206 return rc; 1207 } 1208 } 1209 1210 rc = __ibmvnic_open(netdev); 1211 1212 return rc; 1213 } 1214 1215 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1216 { 1217 struct ibmvnic_rx_pool *rx_pool; 1218 struct ibmvnic_rx_buff *rx_buff; 1219 u64 rx_entries; 1220 int rx_scrqs; 1221 int i, j; 1222 1223 if (!adapter->rx_pool) 1224 return; 1225 1226 rx_scrqs = adapter->num_active_rx_pools; 1227 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1228 1229 /* Free any remaining skbs in the rx buffer pools */ 1230 for (i = 0; i < rx_scrqs; i++) { 1231 rx_pool = &adapter->rx_pool[i]; 1232 if (!rx_pool || !rx_pool->rx_buff) 1233 continue; 1234 1235 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1236 for (j = 0; j < rx_entries; j++) { 1237 rx_buff = &rx_pool->rx_buff[j]; 1238 if (rx_buff && rx_buff->skb) { 1239 dev_kfree_skb_any(rx_buff->skb); 1240 rx_buff->skb = NULL; 1241 } 1242 } 1243 } 1244 } 1245 1246 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1247 struct ibmvnic_tx_pool *tx_pool) 1248 { 1249 struct ibmvnic_tx_buff *tx_buff; 1250 u64 tx_entries; 1251 int i; 1252 1253 if (!tx_pool || !tx_pool->tx_buff) 1254 return; 1255 1256 tx_entries = tx_pool->num_buffers; 1257 1258 for (i = 0; i < tx_entries; i++) { 1259 tx_buff = &tx_pool->tx_buff[i]; 1260 if (tx_buff && tx_buff->skb) { 1261 dev_kfree_skb_any(tx_buff->skb); 1262 tx_buff->skb = NULL; 1263 } 1264 } 1265 } 1266 1267 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1268 { 1269 int tx_scrqs; 1270 int i; 1271 1272 if (!adapter->tx_pool || !adapter->tso_pool) 1273 return; 1274 1275 tx_scrqs = adapter->num_active_tx_pools; 1276 1277 /* Free any remaining skbs in the tx buffer pools */ 1278 for (i = 0; i < tx_scrqs; i++) { 1279 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1280 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1281 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1282 } 1283 } 1284 1285 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1286 { 1287 struct net_device *netdev = adapter->netdev; 1288 int i; 1289 1290 if (adapter->tx_scrq) { 1291 for (i = 0; i < adapter->req_tx_queues; i++) 1292 if (adapter->tx_scrq[i]->irq) { 1293 netdev_dbg(netdev, 1294 "Disabling tx_scrq[%d] irq\n", i); 1295 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1296 disable_irq(adapter->tx_scrq[i]->irq); 1297 } 1298 } 1299 1300 if (adapter->rx_scrq) { 1301 for (i = 0; i < adapter->req_rx_queues; i++) { 1302 if (adapter->rx_scrq[i]->irq) { 1303 netdev_dbg(netdev, 1304 "Disabling rx_scrq[%d] irq\n", i); 1305 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1306 disable_irq(adapter->rx_scrq[i]->irq); 1307 } 1308 } 1309 } 1310 } 1311 1312 static void ibmvnic_cleanup(struct net_device *netdev) 1313 { 1314 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1315 1316 /* ensure that transmissions are stopped if called by do_reset */ 1317 if (test_bit(0, &adapter->resetting)) 1318 netif_tx_disable(netdev); 1319 else 1320 netif_tx_stop_all_queues(netdev); 1321 1322 ibmvnic_napi_disable(adapter); 1323 ibmvnic_disable_irqs(adapter); 1324 1325 clean_rx_pools(adapter); 1326 clean_tx_pools(adapter); 1327 } 1328 1329 static int __ibmvnic_close(struct net_device *netdev) 1330 { 1331 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1332 int rc = 0; 1333 1334 adapter->state = VNIC_CLOSING; 1335 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1336 if (rc) 1337 return rc; 1338 adapter->state = VNIC_CLOSED; 1339 return 0; 1340 } 1341 1342 static int ibmvnic_close(struct net_device *netdev) 1343 { 1344 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1345 int rc; 1346 1347 /* If device failover is pending, just set device state and return. 1348 * Device operation will be handled by reset routine. 1349 */ 1350 if (adapter->failover_pending) { 1351 adapter->state = VNIC_CLOSED; 1352 return 0; 1353 } 1354 1355 rc = __ibmvnic_close(netdev); 1356 ibmvnic_cleanup(netdev); 1357 1358 return rc; 1359 } 1360 1361 /** 1362 * build_hdr_data - creates L2/L3/L4 header data buffer 1363 * @hdr_field - bitfield determining needed headers 1364 * @skb - socket buffer 1365 * @hdr_len - array of header lengths 1366 * @tot_len - total length of data 1367 * 1368 * Reads hdr_field to determine which headers are needed by firmware. 1369 * Builds a buffer containing these headers. Saves individual header 1370 * lengths and total buffer length to be used to build descriptors. 1371 */ 1372 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1373 int *hdr_len, u8 *hdr_data) 1374 { 1375 int len = 0; 1376 u8 *hdr; 1377 1378 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1379 hdr_len[0] = sizeof(struct vlan_ethhdr); 1380 else 1381 hdr_len[0] = sizeof(struct ethhdr); 1382 1383 if (skb->protocol == htons(ETH_P_IP)) { 1384 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1385 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1386 hdr_len[2] = tcp_hdrlen(skb); 1387 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1388 hdr_len[2] = sizeof(struct udphdr); 1389 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1390 hdr_len[1] = sizeof(struct ipv6hdr); 1391 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1392 hdr_len[2] = tcp_hdrlen(skb); 1393 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1394 hdr_len[2] = sizeof(struct udphdr); 1395 } else if (skb->protocol == htons(ETH_P_ARP)) { 1396 hdr_len[1] = arp_hdr_len(skb->dev); 1397 hdr_len[2] = 0; 1398 } 1399 1400 memset(hdr_data, 0, 120); 1401 if ((hdr_field >> 6) & 1) { 1402 hdr = skb_mac_header(skb); 1403 memcpy(hdr_data, hdr, hdr_len[0]); 1404 len += hdr_len[0]; 1405 } 1406 1407 if ((hdr_field >> 5) & 1) { 1408 hdr = skb_network_header(skb); 1409 memcpy(hdr_data + len, hdr, hdr_len[1]); 1410 len += hdr_len[1]; 1411 } 1412 1413 if ((hdr_field >> 4) & 1) { 1414 hdr = skb_transport_header(skb); 1415 memcpy(hdr_data + len, hdr, hdr_len[2]); 1416 len += hdr_len[2]; 1417 } 1418 return len; 1419 } 1420 1421 /** 1422 * create_hdr_descs - create header and header extension descriptors 1423 * @hdr_field - bitfield determining needed headers 1424 * @data - buffer containing header data 1425 * @len - length of data buffer 1426 * @hdr_len - array of individual header lengths 1427 * @scrq_arr - descriptor array 1428 * 1429 * Creates header and, if needed, header extension descriptors and 1430 * places them in a descriptor array, scrq_arr 1431 */ 1432 1433 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1434 union sub_crq *scrq_arr) 1435 { 1436 union sub_crq hdr_desc; 1437 int tmp_len = len; 1438 int num_descs = 0; 1439 u8 *data, *cur; 1440 int tmp; 1441 1442 while (tmp_len > 0) { 1443 cur = hdr_data + len - tmp_len; 1444 1445 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1446 if (cur != hdr_data) { 1447 data = hdr_desc.hdr_ext.data; 1448 tmp = tmp_len > 29 ? 29 : tmp_len; 1449 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1450 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1451 hdr_desc.hdr_ext.len = tmp; 1452 } else { 1453 data = hdr_desc.hdr.data; 1454 tmp = tmp_len > 24 ? 24 : tmp_len; 1455 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1456 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1457 hdr_desc.hdr.len = tmp; 1458 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1459 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1460 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1461 hdr_desc.hdr.flag = hdr_field << 1; 1462 } 1463 memcpy(data, cur, tmp); 1464 tmp_len -= tmp; 1465 *scrq_arr = hdr_desc; 1466 scrq_arr++; 1467 num_descs++; 1468 } 1469 1470 return num_descs; 1471 } 1472 1473 /** 1474 * build_hdr_descs_arr - build a header descriptor array 1475 * @skb - socket buffer 1476 * @num_entries - number of descriptors to be sent 1477 * @subcrq - first TX descriptor 1478 * @hdr_field - bit field determining which headers will be sent 1479 * 1480 * This function will build a TX descriptor array with applicable 1481 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1482 */ 1483 1484 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1485 int *num_entries, u8 hdr_field) 1486 { 1487 int hdr_len[3] = {0, 0, 0}; 1488 int tot_len; 1489 u8 *hdr_data = txbuff->hdr_data; 1490 1491 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1492 txbuff->hdr_data); 1493 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1494 txbuff->indir_arr + 1); 1495 } 1496 1497 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1498 struct net_device *netdev) 1499 { 1500 /* For some backing devices, mishandling of small packets 1501 * can result in a loss of connection or TX stall. Device 1502 * architects recommend that no packet should be smaller 1503 * than the minimum MTU value provided to the driver, so 1504 * pad any packets to that length 1505 */ 1506 if (skb->len < netdev->min_mtu) 1507 return skb_put_padto(skb, netdev->min_mtu); 1508 1509 return 0; 1510 } 1511 1512 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1513 { 1514 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1515 int queue_num = skb_get_queue_mapping(skb); 1516 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1517 struct device *dev = &adapter->vdev->dev; 1518 struct ibmvnic_tx_buff *tx_buff = NULL; 1519 struct ibmvnic_sub_crq_queue *tx_scrq; 1520 struct ibmvnic_tx_pool *tx_pool; 1521 unsigned int tx_send_failed = 0; 1522 unsigned int tx_map_failed = 0; 1523 unsigned int tx_dropped = 0; 1524 unsigned int tx_packets = 0; 1525 unsigned int tx_bytes = 0; 1526 dma_addr_t data_dma_addr; 1527 struct netdev_queue *txq; 1528 unsigned long lpar_rc; 1529 union sub_crq tx_crq; 1530 unsigned int offset; 1531 int num_entries = 1; 1532 unsigned char *dst; 1533 u64 *handle_array; 1534 int index = 0; 1535 u8 proto = 0; 1536 netdev_tx_t ret = NETDEV_TX_OK; 1537 1538 if (test_bit(0, &adapter->resetting)) { 1539 if (!netif_subqueue_stopped(netdev, skb)) 1540 netif_stop_subqueue(netdev, queue_num); 1541 dev_kfree_skb_any(skb); 1542 1543 tx_send_failed++; 1544 tx_dropped++; 1545 ret = NETDEV_TX_OK; 1546 goto out; 1547 } 1548 1549 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1550 tx_dropped++; 1551 tx_send_failed++; 1552 ret = NETDEV_TX_OK; 1553 goto out; 1554 } 1555 if (skb_is_gso(skb)) 1556 tx_pool = &adapter->tso_pool[queue_num]; 1557 else 1558 tx_pool = &adapter->tx_pool[queue_num]; 1559 1560 tx_scrq = adapter->tx_scrq[queue_num]; 1561 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1562 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1563 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1564 1565 index = tx_pool->free_map[tx_pool->consumer_index]; 1566 1567 if (index == IBMVNIC_INVALID_MAP) { 1568 dev_kfree_skb_any(skb); 1569 tx_send_failed++; 1570 tx_dropped++; 1571 ret = NETDEV_TX_OK; 1572 goto out; 1573 } 1574 1575 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1576 1577 offset = index * tx_pool->buf_size; 1578 dst = tx_pool->long_term_buff.buff + offset; 1579 memset(dst, 0, tx_pool->buf_size); 1580 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1581 1582 if (skb_shinfo(skb)->nr_frags) { 1583 int cur, i; 1584 1585 /* Copy the head */ 1586 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1587 cur = skb_headlen(skb); 1588 1589 /* Copy the frags */ 1590 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1591 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1592 1593 memcpy(dst + cur, 1594 page_address(skb_frag_page(frag)) + 1595 skb_frag_off(frag), skb_frag_size(frag)); 1596 cur += skb_frag_size(frag); 1597 } 1598 } else { 1599 skb_copy_from_linear_data(skb, dst, skb->len); 1600 } 1601 1602 tx_pool->consumer_index = 1603 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1604 1605 tx_buff = &tx_pool->tx_buff[index]; 1606 tx_buff->skb = skb; 1607 tx_buff->data_dma[0] = data_dma_addr; 1608 tx_buff->data_len[0] = skb->len; 1609 tx_buff->index = index; 1610 tx_buff->pool_index = queue_num; 1611 tx_buff->last_frag = true; 1612 1613 memset(&tx_crq, 0, sizeof(tx_crq)); 1614 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1615 tx_crq.v1.type = IBMVNIC_TX_DESC; 1616 tx_crq.v1.n_crq_elem = 1; 1617 tx_crq.v1.n_sge = 1; 1618 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1619 1620 if (skb_is_gso(skb)) 1621 tx_crq.v1.correlator = 1622 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1623 else 1624 tx_crq.v1.correlator = cpu_to_be32(index); 1625 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1626 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1627 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1628 1629 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1630 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1631 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1632 } 1633 1634 if (skb->protocol == htons(ETH_P_IP)) { 1635 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1636 proto = ip_hdr(skb)->protocol; 1637 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1638 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1639 proto = ipv6_hdr(skb)->nexthdr; 1640 } 1641 1642 if (proto == IPPROTO_TCP) 1643 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1644 else if (proto == IPPROTO_UDP) 1645 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1646 1647 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1648 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1649 hdrs += 2; 1650 } 1651 if (skb_is_gso(skb)) { 1652 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1653 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1654 hdrs += 2; 1655 } 1656 /* determine if l2/3/4 headers are sent to firmware */ 1657 if ((*hdrs >> 7) & 1) { 1658 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1659 tx_crq.v1.n_crq_elem = num_entries; 1660 tx_buff->num_entries = num_entries; 1661 tx_buff->indir_arr[0] = tx_crq; 1662 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1663 sizeof(tx_buff->indir_arr), 1664 DMA_TO_DEVICE); 1665 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1666 dev_kfree_skb_any(skb); 1667 tx_buff->skb = NULL; 1668 if (!firmware_has_feature(FW_FEATURE_CMO)) 1669 dev_err(dev, "tx: unable to map descriptor array\n"); 1670 tx_map_failed++; 1671 tx_dropped++; 1672 ret = NETDEV_TX_OK; 1673 goto tx_err_out; 1674 } 1675 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1676 (u64)tx_buff->indir_dma, 1677 (u64)num_entries); 1678 dma_unmap_single(dev, tx_buff->indir_dma, 1679 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE); 1680 } else { 1681 tx_buff->num_entries = num_entries; 1682 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1683 &tx_crq); 1684 } 1685 if (lpar_rc != H_SUCCESS) { 1686 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1687 dev_err_ratelimited(dev, "tx: send failed\n"); 1688 dev_kfree_skb_any(skb); 1689 tx_buff->skb = NULL; 1690 1691 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1692 /* Disable TX and report carrier off if queue is closed 1693 * or pending failover. 1694 * Firmware guarantees that a signal will be sent to the 1695 * driver, triggering a reset or some other action. 1696 */ 1697 netif_tx_stop_all_queues(netdev); 1698 netif_carrier_off(netdev); 1699 } 1700 1701 tx_send_failed++; 1702 tx_dropped++; 1703 ret = NETDEV_TX_OK; 1704 goto tx_err_out; 1705 } 1706 1707 if (atomic_add_return(num_entries, &tx_scrq->used) 1708 >= adapter->req_tx_entries_per_subcrq) { 1709 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1710 netif_stop_subqueue(netdev, queue_num); 1711 } 1712 1713 tx_packets++; 1714 tx_bytes += skb->len; 1715 txq->trans_start = jiffies; 1716 ret = NETDEV_TX_OK; 1717 goto out; 1718 1719 tx_err_out: 1720 /* roll back consumer index and map array*/ 1721 if (tx_pool->consumer_index == 0) 1722 tx_pool->consumer_index = 1723 tx_pool->num_buffers - 1; 1724 else 1725 tx_pool->consumer_index--; 1726 tx_pool->free_map[tx_pool->consumer_index] = index; 1727 out: 1728 netdev->stats.tx_dropped += tx_dropped; 1729 netdev->stats.tx_bytes += tx_bytes; 1730 netdev->stats.tx_packets += tx_packets; 1731 adapter->tx_send_failed += tx_send_failed; 1732 adapter->tx_map_failed += tx_map_failed; 1733 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1734 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1735 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1736 1737 return ret; 1738 } 1739 1740 static void ibmvnic_set_multi(struct net_device *netdev) 1741 { 1742 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1743 struct netdev_hw_addr *ha; 1744 union ibmvnic_crq crq; 1745 1746 memset(&crq, 0, sizeof(crq)); 1747 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1748 crq.request_capability.cmd = REQUEST_CAPABILITY; 1749 1750 if (netdev->flags & IFF_PROMISC) { 1751 if (!adapter->promisc_supported) 1752 return; 1753 } else { 1754 if (netdev->flags & IFF_ALLMULTI) { 1755 /* Accept all multicast */ 1756 memset(&crq, 0, sizeof(crq)); 1757 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1758 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1759 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1760 ibmvnic_send_crq(adapter, &crq); 1761 } else if (netdev_mc_empty(netdev)) { 1762 /* Reject all multicast */ 1763 memset(&crq, 0, sizeof(crq)); 1764 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1765 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1766 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1767 ibmvnic_send_crq(adapter, &crq); 1768 } else { 1769 /* Accept one or more multicast(s) */ 1770 netdev_for_each_mc_addr(ha, netdev) { 1771 memset(&crq, 0, sizeof(crq)); 1772 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1773 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1774 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1775 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1776 ha->addr); 1777 ibmvnic_send_crq(adapter, &crq); 1778 } 1779 } 1780 } 1781 } 1782 1783 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1784 { 1785 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1786 union ibmvnic_crq crq; 1787 int rc; 1788 1789 if (!is_valid_ether_addr(dev_addr)) { 1790 rc = -EADDRNOTAVAIL; 1791 goto err; 1792 } 1793 1794 memset(&crq, 0, sizeof(crq)); 1795 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1796 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1797 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1798 1799 mutex_lock(&adapter->fw_lock); 1800 adapter->fw_done_rc = 0; 1801 reinit_completion(&adapter->fw_done); 1802 1803 rc = ibmvnic_send_crq(adapter, &crq); 1804 if (rc) { 1805 rc = -EIO; 1806 mutex_unlock(&adapter->fw_lock); 1807 goto err; 1808 } 1809 1810 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1811 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1812 if (rc || adapter->fw_done_rc) { 1813 rc = -EIO; 1814 mutex_unlock(&adapter->fw_lock); 1815 goto err; 1816 } 1817 mutex_unlock(&adapter->fw_lock); 1818 return 0; 1819 err: 1820 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1821 return rc; 1822 } 1823 1824 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1825 { 1826 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1827 struct sockaddr *addr = p; 1828 int rc; 1829 1830 rc = 0; 1831 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1832 if (adapter->state != VNIC_PROBED) 1833 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1834 1835 return rc; 1836 } 1837 1838 /** 1839 * do_change_param_reset returns zero if we are able to keep processing reset 1840 * events, or non-zero if we hit a fatal error and must halt. 1841 */ 1842 static int do_change_param_reset(struct ibmvnic_adapter *adapter, 1843 struct ibmvnic_rwi *rwi, 1844 u32 reset_state) 1845 { 1846 struct net_device *netdev = adapter->netdev; 1847 int i, rc; 1848 1849 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n", 1850 rwi->reset_reason); 1851 1852 netif_carrier_off(netdev); 1853 adapter->reset_reason = rwi->reset_reason; 1854 1855 ibmvnic_cleanup(netdev); 1856 1857 if (reset_state == VNIC_OPEN) { 1858 rc = __ibmvnic_close(netdev); 1859 if (rc) 1860 return rc; 1861 } 1862 1863 release_resources(adapter); 1864 release_sub_crqs(adapter, 1); 1865 release_crq_queue(adapter); 1866 1867 adapter->state = VNIC_PROBED; 1868 1869 rc = init_crq_queue(adapter); 1870 1871 if (rc) { 1872 netdev_err(adapter->netdev, 1873 "Couldn't initialize crq. rc=%d\n", rc); 1874 return rc; 1875 } 1876 1877 rc = ibmvnic_reset_init(adapter); 1878 if (rc) 1879 return IBMVNIC_INIT_FAILED; 1880 1881 /* If the adapter was in PROBE state prior to the reset, 1882 * exit here. 1883 */ 1884 if (reset_state == VNIC_PROBED) 1885 return 0; 1886 1887 rc = ibmvnic_login(netdev); 1888 if (rc) { 1889 adapter->state = reset_state; 1890 return rc; 1891 } 1892 1893 rc = init_resources(adapter); 1894 if (rc) 1895 return rc; 1896 1897 ibmvnic_disable_irqs(adapter); 1898 1899 adapter->state = VNIC_CLOSED; 1900 1901 if (reset_state == VNIC_CLOSED) 1902 return 0; 1903 1904 rc = __ibmvnic_open(netdev); 1905 if (rc) 1906 return IBMVNIC_OPEN_FAILED; 1907 1908 /* refresh device's multicast list */ 1909 ibmvnic_set_multi(netdev); 1910 1911 /* kick napi */ 1912 for (i = 0; i < adapter->req_rx_queues; i++) 1913 napi_schedule(&adapter->napi[i]); 1914 1915 return 0; 1916 } 1917 1918 /** 1919 * do_reset returns zero if we are able to keep processing reset events, or 1920 * non-zero if we hit a fatal error and must halt. 1921 */ 1922 static int do_reset(struct ibmvnic_adapter *adapter, 1923 struct ibmvnic_rwi *rwi, u32 reset_state) 1924 { 1925 u64 old_num_rx_queues, old_num_tx_queues; 1926 u64 old_num_rx_slots, old_num_tx_slots; 1927 struct net_device *netdev = adapter->netdev; 1928 int i, rc; 1929 1930 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1931 rwi->reset_reason); 1932 1933 rtnl_lock(); 1934 1935 netif_carrier_off(netdev); 1936 adapter->reset_reason = rwi->reset_reason; 1937 1938 old_num_rx_queues = adapter->req_rx_queues; 1939 old_num_tx_queues = adapter->req_tx_queues; 1940 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1941 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1942 1943 ibmvnic_cleanup(netdev); 1944 1945 if (reset_state == VNIC_OPEN && 1946 adapter->reset_reason != VNIC_RESET_MOBILITY && 1947 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1948 adapter->state = VNIC_CLOSING; 1949 1950 /* Release the RTNL lock before link state change and 1951 * re-acquire after the link state change to allow 1952 * linkwatch_event to grab the RTNL lock and run during 1953 * a reset. 1954 */ 1955 rtnl_unlock(); 1956 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1957 rtnl_lock(); 1958 if (rc) 1959 goto out; 1960 1961 if (adapter->state != VNIC_CLOSING) { 1962 rc = -1; 1963 goto out; 1964 } 1965 1966 adapter->state = VNIC_CLOSED; 1967 } 1968 1969 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1970 /* remove the closed state so when we call open it appears 1971 * we are coming from the probed state. 1972 */ 1973 adapter->state = VNIC_PROBED; 1974 1975 if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1976 rc = ibmvnic_reenable_crq_queue(adapter); 1977 release_sub_crqs(adapter, 1); 1978 } else { 1979 rc = ibmvnic_reset_crq(adapter); 1980 if (rc == H_CLOSED || rc == H_SUCCESS) { 1981 rc = vio_enable_interrupts(adapter->vdev); 1982 if (rc) 1983 netdev_err(adapter->netdev, 1984 "Reset failed to enable interrupts. rc=%d\n", 1985 rc); 1986 } 1987 } 1988 1989 if (rc) { 1990 netdev_err(adapter->netdev, 1991 "Reset couldn't initialize crq. rc=%d\n", rc); 1992 goto out; 1993 } 1994 1995 rc = ibmvnic_reset_init(adapter); 1996 if (rc) { 1997 rc = IBMVNIC_INIT_FAILED; 1998 goto out; 1999 } 2000 2001 /* If the adapter was in PROBE state prior to the reset, 2002 * exit here. 2003 */ 2004 if (reset_state == VNIC_PROBED) { 2005 rc = 0; 2006 goto out; 2007 } 2008 2009 rc = ibmvnic_login(netdev); 2010 if (rc) { 2011 adapter->state = reset_state; 2012 goto out; 2013 } 2014 2015 if (adapter->req_rx_queues != old_num_rx_queues || 2016 adapter->req_tx_queues != old_num_tx_queues || 2017 adapter->req_rx_add_entries_per_subcrq != 2018 old_num_rx_slots || 2019 adapter->req_tx_entries_per_subcrq != 2020 old_num_tx_slots || 2021 !adapter->rx_pool || 2022 !adapter->tso_pool || 2023 !adapter->tx_pool) { 2024 release_rx_pools(adapter); 2025 release_tx_pools(adapter); 2026 release_napi(adapter); 2027 release_vpd_data(adapter); 2028 2029 rc = init_resources(adapter); 2030 if (rc) 2031 goto out; 2032 2033 } else { 2034 rc = reset_tx_pools(adapter); 2035 if (rc) 2036 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2037 rc); 2038 goto out; 2039 2040 rc = reset_rx_pools(adapter); 2041 if (rc) 2042 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2043 rc); 2044 goto out; 2045 } 2046 ibmvnic_disable_irqs(adapter); 2047 } 2048 adapter->state = VNIC_CLOSED; 2049 2050 if (reset_state == VNIC_CLOSED) { 2051 rc = 0; 2052 goto out; 2053 } 2054 2055 rc = __ibmvnic_open(netdev); 2056 if (rc) { 2057 rc = IBMVNIC_OPEN_FAILED; 2058 goto out; 2059 } 2060 2061 /* refresh device's multicast list */ 2062 ibmvnic_set_multi(netdev); 2063 2064 /* kick napi */ 2065 for (i = 0; i < adapter->req_rx_queues; i++) 2066 napi_schedule(&adapter->napi[i]); 2067 2068 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 2069 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2070 2071 rc = 0; 2072 2073 out: 2074 rtnl_unlock(); 2075 2076 return rc; 2077 } 2078 2079 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2080 struct ibmvnic_rwi *rwi, u32 reset_state) 2081 { 2082 struct net_device *netdev = adapter->netdev; 2083 int rc; 2084 2085 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2086 rwi->reset_reason); 2087 2088 netif_carrier_off(netdev); 2089 adapter->reset_reason = rwi->reset_reason; 2090 2091 ibmvnic_cleanup(netdev); 2092 release_resources(adapter); 2093 release_sub_crqs(adapter, 0); 2094 release_crq_queue(adapter); 2095 2096 /* remove the closed state so when we call open it appears 2097 * we are coming from the probed state. 2098 */ 2099 adapter->state = VNIC_PROBED; 2100 2101 reinit_completion(&adapter->init_done); 2102 rc = init_crq_queue(adapter); 2103 if (rc) { 2104 netdev_err(adapter->netdev, 2105 "Couldn't initialize crq. rc=%d\n", rc); 2106 return rc; 2107 } 2108 2109 rc = ibmvnic_init(adapter); 2110 if (rc) 2111 return rc; 2112 2113 /* If the adapter was in PROBE state prior to the reset, 2114 * exit here. 2115 */ 2116 if (reset_state == VNIC_PROBED) 2117 return 0; 2118 2119 rc = ibmvnic_login(netdev); 2120 if (rc) { 2121 adapter->state = VNIC_PROBED; 2122 return 0; 2123 } 2124 2125 rc = init_resources(adapter); 2126 if (rc) 2127 return rc; 2128 2129 ibmvnic_disable_irqs(adapter); 2130 adapter->state = VNIC_CLOSED; 2131 2132 if (reset_state == VNIC_CLOSED) 2133 return 0; 2134 2135 rc = __ibmvnic_open(netdev); 2136 if (rc) 2137 return IBMVNIC_OPEN_FAILED; 2138 2139 return 0; 2140 } 2141 2142 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2143 { 2144 struct ibmvnic_rwi *rwi; 2145 unsigned long flags; 2146 2147 spin_lock_irqsave(&adapter->rwi_lock, flags); 2148 2149 if (!list_empty(&adapter->rwi_list)) { 2150 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2151 list); 2152 list_del(&rwi->list); 2153 } else { 2154 rwi = NULL; 2155 } 2156 2157 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2158 return rwi; 2159 } 2160 2161 static void free_all_rwi(struct ibmvnic_adapter *adapter) 2162 { 2163 struct ibmvnic_rwi *rwi; 2164 2165 rwi = get_next_rwi(adapter); 2166 while (rwi) { 2167 kfree(rwi); 2168 rwi = get_next_rwi(adapter); 2169 } 2170 } 2171 2172 static void __ibmvnic_reset(struct work_struct *work) 2173 { 2174 struct ibmvnic_rwi *rwi; 2175 struct ibmvnic_adapter *adapter; 2176 bool saved_state = false; 2177 unsigned long flags; 2178 u32 reset_state; 2179 int rc = 0; 2180 2181 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2182 2183 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2184 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2185 IBMVNIC_RESET_DELAY); 2186 return; 2187 } 2188 2189 rwi = get_next_rwi(adapter); 2190 while (rwi) { 2191 spin_lock_irqsave(&adapter->state_lock, flags); 2192 2193 if (adapter->state == VNIC_REMOVING || 2194 adapter->state == VNIC_REMOVED) { 2195 spin_unlock_irqrestore(&adapter->state_lock, flags); 2196 kfree(rwi); 2197 rc = EBUSY; 2198 break; 2199 } 2200 2201 if (!saved_state) { 2202 reset_state = adapter->state; 2203 adapter->state = VNIC_RESETTING; 2204 saved_state = true; 2205 } 2206 spin_unlock_irqrestore(&adapter->state_lock, flags); 2207 2208 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2209 /* CHANGE_PARAM requestor holds rtnl_lock */ 2210 rc = do_change_param_reset(adapter, rwi, reset_state); 2211 } else if (adapter->force_reset_recovery) { 2212 /* Transport event occurred during previous reset */ 2213 if (adapter->wait_for_reset) { 2214 /* Previous was CHANGE_PARAM; caller locked */ 2215 adapter->force_reset_recovery = false; 2216 rc = do_hard_reset(adapter, rwi, reset_state); 2217 } else { 2218 rtnl_lock(); 2219 adapter->force_reset_recovery = false; 2220 rc = do_hard_reset(adapter, rwi, reset_state); 2221 rtnl_unlock(); 2222 } 2223 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL && 2224 adapter->from_passive_init)) { 2225 rc = do_reset(adapter, rwi, reset_state); 2226 } 2227 kfree(rwi); 2228 if (rc == IBMVNIC_OPEN_FAILED) { 2229 if (list_empty(&adapter->rwi_list)) 2230 adapter->state = VNIC_CLOSED; 2231 else 2232 adapter->state = reset_state; 2233 rc = 0; 2234 } else if (rc && rc != IBMVNIC_INIT_FAILED && 2235 !adapter->force_reset_recovery) 2236 break; 2237 2238 rwi = get_next_rwi(adapter); 2239 2240 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2241 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2242 adapter->force_reset_recovery = true; 2243 } 2244 2245 if (adapter->wait_for_reset) { 2246 adapter->reset_done_rc = rc; 2247 complete(&adapter->reset_done); 2248 } 2249 2250 if (rc) { 2251 netdev_dbg(adapter->netdev, "Reset failed\n"); 2252 free_all_rwi(adapter); 2253 } 2254 2255 clear_bit_unlock(0, &adapter->resetting); 2256 } 2257 2258 static void __ibmvnic_delayed_reset(struct work_struct *work) 2259 { 2260 struct ibmvnic_adapter *adapter; 2261 2262 adapter = container_of(work, struct ibmvnic_adapter, 2263 ibmvnic_delayed_reset.work); 2264 __ibmvnic_reset(&adapter->ibmvnic_reset); 2265 } 2266 2267 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2268 enum ibmvnic_reset_reason reason) 2269 { 2270 struct list_head *entry, *tmp_entry; 2271 struct ibmvnic_rwi *rwi, *tmp; 2272 struct net_device *netdev = adapter->netdev; 2273 unsigned long flags; 2274 int ret; 2275 2276 if (adapter->state == VNIC_REMOVING || 2277 adapter->state == VNIC_REMOVED || 2278 adapter->failover_pending) { 2279 ret = EBUSY; 2280 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2281 goto err; 2282 } 2283 2284 if (adapter->state == VNIC_PROBING) { 2285 netdev_warn(netdev, "Adapter reset during probe\n"); 2286 ret = adapter->init_done_rc = EAGAIN; 2287 goto err; 2288 } 2289 2290 spin_lock_irqsave(&adapter->rwi_lock, flags); 2291 2292 list_for_each(entry, &adapter->rwi_list) { 2293 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2294 if (tmp->reset_reason == reason) { 2295 netdev_dbg(netdev, "Skipping matching reset\n"); 2296 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2297 ret = EBUSY; 2298 goto err; 2299 } 2300 } 2301 2302 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2303 if (!rwi) { 2304 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2305 ibmvnic_close(netdev); 2306 ret = ENOMEM; 2307 goto err; 2308 } 2309 /* if we just received a transport event, 2310 * flush reset queue and process this reset 2311 */ 2312 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2313 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2314 list_del(entry); 2315 } 2316 rwi->reset_reason = reason; 2317 list_add_tail(&rwi->list, &adapter->rwi_list); 2318 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2319 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2320 schedule_work(&adapter->ibmvnic_reset); 2321 2322 return 0; 2323 err: 2324 return -ret; 2325 } 2326 2327 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2328 { 2329 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2330 2331 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2332 } 2333 2334 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2335 struct ibmvnic_rx_buff *rx_buff) 2336 { 2337 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2338 2339 rx_buff->skb = NULL; 2340 2341 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2342 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2343 2344 atomic_dec(&pool->available); 2345 } 2346 2347 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2348 { 2349 struct net_device *netdev = napi->dev; 2350 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2351 int scrq_num = (int)(napi - adapter->napi); 2352 int frames_processed = 0; 2353 2354 restart_poll: 2355 while (frames_processed < budget) { 2356 struct sk_buff *skb; 2357 struct ibmvnic_rx_buff *rx_buff; 2358 union sub_crq *next; 2359 u32 length; 2360 u16 offset; 2361 u8 flags = 0; 2362 2363 if (unlikely(test_bit(0, &adapter->resetting) && 2364 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2365 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2366 napi_complete_done(napi, frames_processed); 2367 return frames_processed; 2368 } 2369 2370 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2371 break; 2372 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2373 rx_buff = 2374 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2375 rx_comp.correlator); 2376 /* do error checking */ 2377 if (next->rx_comp.rc) { 2378 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2379 be16_to_cpu(next->rx_comp.rc)); 2380 /* free the entry */ 2381 next->rx_comp.first = 0; 2382 dev_kfree_skb_any(rx_buff->skb); 2383 remove_buff_from_pool(adapter, rx_buff); 2384 continue; 2385 } else if (!rx_buff->skb) { 2386 /* free the entry */ 2387 next->rx_comp.first = 0; 2388 remove_buff_from_pool(adapter, rx_buff); 2389 continue; 2390 } 2391 2392 length = be32_to_cpu(next->rx_comp.len); 2393 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2394 flags = next->rx_comp.flags; 2395 skb = rx_buff->skb; 2396 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2397 length); 2398 2399 /* VLAN Header has been stripped by the system firmware and 2400 * needs to be inserted by the driver 2401 */ 2402 if (adapter->rx_vlan_header_insertion && 2403 (flags & IBMVNIC_VLAN_STRIPPED)) 2404 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2405 ntohs(next->rx_comp.vlan_tci)); 2406 2407 /* free the entry */ 2408 next->rx_comp.first = 0; 2409 remove_buff_from_pool(adapter, rx_buff); 2410 2411 skb_put(skb, length); 2412 skb->protocol = eth_type_trans(skb, netdev); 2413 skb_record_rx_queue(skb, scrq_num); 2414 2415 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2416 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2417 skb->ip_summed = CHECKSUM_UNNECESSARY; 2418 } 2419 2420 length = skb->len; 2421 napi_gro_receive(napi, skb); /* send it up */ 2422 netdev->stats.rx_packets++; 2423 netdev->stats.rx_bytes += length; 2424 adapter->rx_stats_buffers[scrq_num].packets++; 2425 adapter->rx_stats_buffers[scrq_num].bytes += length; 2426 frames_processed++; 2427 } 2428 2429 if (adapter->state != VNIC_CLOSING) 2430 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2431 2432 if (frames_processed < budget) { 2433 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2434 napi_complete_done(napi, frames_processed); 2435 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2436 napi_reschedule(napi)) { 2437 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2438 goto restart_poll; 2439 } 2440 } 2441 return frames_processed; 2442 } 2443 2444 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2445 { 2446 int rc, ret; 2447 2448 adapter->fallback.mtu = adapter->req_mtu; 2449 adapter->fallback.rx_queues = adapter->req_rx_queues; 2450 adapter->fallback.tx_queues = adapter->req_tx_queues; 2451 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2452 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2453 2454 reinit_completion(&adapter->reset_done); 2455 adapter->wait_for_reset = true; 2456 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2457 2458 if (rc) { 2459 ret = rc; 2460 goto out; 2461 } 2462 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2463 if (rc) { 2464 ret = -ENODEV; 2465 goto out; 2466 } 2467 2468 ret = 0; 2469 if (adapter->reset_done_rc) { 2470 ret = -EIO; 2471 adapter->desired.mtu = adapter->fallback.mtu; 2472 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2473 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2474 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2475 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2476 2477 reinit_completion(&adapter->reset_done); 2478 adapter->wait_for_reset = true; 2479 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2480 if (rc) { 2481 ret = rc; 2482 goto out; 2483 } 2484 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2485 60000); 2486 if (rc) { 2487 ret = -ENODEV; 2488 goto out; 2489 } 2490 } 2491 out: 2492 adapter->wait_for_reset = false; 2493 2494 return ret; 2495 } 2496 2497 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2498 { 2499 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2500 2501 adapter->desired.mtu = new_mtu + ETH_HLEN; 2502 2503 return wait_for_reset(adapter); 2504 } 2505 2506 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2507 struct net_device *dev, 2508 netdev_features_t features) 2509 { 2510 /* Some backing hardware adapters can not 2511 * handle packets with a MSS less than 224 2512 * or with only one segment. 2513 */ 2514 if (skb_is_gso(skb)) { 2515 if (skb_shinfo(skb)->gso_size < 224 || 2516 skb_shinfo(skb)->gso_segs == 1) 2517 features &= ~NETIF_F_GSO_MASK; 2518 } 2519 2520 return features; 2521 } 2522 2523 static const struct net_device_ops ibmvnic_netdev_ops = { 2524 .ndo_open = ibmvnic_open, 2525 .ndo_stop = ibmvnic_close, 2526 .ndo_start_xmit = ibmvnic_xmit, 2527 .ndo_set_rx_mode = ibmvnic_set_multi, 2528 .ndo_set_mac_address = ibmvnic_set_mac, 2529 .ndo_validate_addr = eth_validate_addr, 2530 .ndo_tx_timeout = ibmvnic_tx_timeout, 2531 .ndo_change_mtu = ibmvnic_change_mtu, 2532 .ndo_features_check = ibmvnic_features_check, 2533 }; 2534 2535 /* ethtool functions */ 2536 2537 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2538 struct ethtool_link_ksettings *cmd) 2539 { 2540 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2541 int rc; 2542 2543 rc = send_query_phys_parms(adapter); 2544 if (rc) { 2545 adapter->speed = SPEED_UNKNOWN; 2546 adapter->duplex = DUPLEX_UNKNOWN; 2547 } 2548 cmd->base.speed = adapter->speed; 2549 cmd->base.duplex = adapter->duplex; 2550 cmd->base.port = PORT_FIBRE; 2551 cmd->base.phy_address = 0; 2552 cmd->base.autoneg = AUTONEG_ENABLE; 2553 2554 return 0; 2555 } 2556 2557 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2558 struct ethtool_drvinfo *info) 2559 { 2560 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2561 2562 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2563 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2564 strlcpy(info->fw_version, adapter->fw_version, 2565 sizeof(info->fw_version)); 2566 } 2567 2568 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2569 { 2570 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2571 2572 return adapter->msg_enable; 2573 } 2574 2575 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2576 { 2577 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2578 2579 adapter->msg_enable = data; 2580 } 2581 2582 static u32 ibmvnic_get_link(struct net_device *netdev) 2583 { 2584 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2585 2586 /* Don't need to send a query because we request a logical link up at 2587 * init and then we wait for link state indications 2588 */ 2589 return adapter->logical_link_state; 2590 } 2591 2592 static void ibmvnic_get_ringparam(struct net_device *netdev, 2593 struct ethtool_ringparam *ring) 2594 { 2595 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2596 2597 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2598 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2599 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2600 } else { 2601 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2602 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2603 } 2604 ring->rx_mini_max_pending = 0; 2605 ring->rx_jumbo_max_pending = 0; 2606 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2607 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2608 ring->rx_mini_pending = 0; 2609 ring->rx_jumbo_pending = 0; 2610 } 2611 2612 static int ibmvnic_set_ringparam(struct net_device *netdev, 2613 struct ethtool_ringparam *ring) 2614 { 2615 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2616 int ret; 2617 2618 ret = 0; 2619 adapter->desired.rx_entries = ring->rx_pending; 2620 adapter->desired.tx_entries = ring->tx_pending; 2621 2622 ret = wait_for_reset(adapter); 2623 2624 if (!ret && 2625 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2626 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2627 netdev_info(netdev, 2628 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2629 ring->rx_pending, ring->tx_pending, 2630 adapter->req_rx_add_entries_per_subcrq, 2631 adapter->req_tx_entries_per_subcrq); 2632 return ret; 2633 } 2634 2635 static void ibmvnic_get_channels(struct net_device *netdev, 2636 struct ethtool_channels *channels) 2637 { 2638 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2639 2640 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2641 channels->max_rx = adapter->max_rx_queues; 2642 channels->max_tx = adapter->max_tx_queues; 2643 } else { 2644 channels->max_rx = IBMVNIC_MAX_QUEUES; 2645 channels->max_tx = IBMVNIC_MAX_QUEUES; 2646 } 2647 2648 channels->max_other = 0; 2649 channels->max_combined = 0; 2650 channels->rx_count = adapter->req_rx_queues; 2651 channels->tx_count = adapter->req_tx_queues; 2652 channels->other_count = 0; 2653 channels->combined_count = 0; 2654 } 2655 2656 static int ibmvnic_set_channels(struct net_device *netdev, 2657 struct ethtool_channels *channels) 2658 { 2659 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2660 int ret; 2661 2662 ret = 0; 2663 adapter->desired.rx_queues = channels->rx_count; 2664 adapter->desired.tx_queues = channels->tx_count; 2665 2666 ret = wait_for_reset(adapter); 2667 2668 if (!ret && 2669 (adapter->req_rx_queues != channels->rx_count || 2670 adapter->req_tx_queues != channels->tx_count)) 2671 netdev_info(netdev, 2672 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2673 channels->rx_count, channels->tx_count, 2674 adapter->req_rx_queues, adapter->req_tx_queues); 2675 return ret; 2676 2677 } 2678 2679 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2680 { 2681 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2682 int i; 2683 2684 switch (stringset) { 2685 case ETH_SS_STATS: 2686 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2687 i++, data += ETH_GSTRING_LEN) 2688 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2689 2690 for (i = 0; i < adapter->req_tx_queues; i++) { 2691 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2692 data += ETH_GSTRING_LEN; 2693 2694 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2695 data += ETH_GSTRING_LEN; 2696 2697 snprintf(data, ETH_GSTRING_LEN, 2698 "tx%d_dropped_packets", i); 2699 data += ETH_GSTRING_LEN; 2700 } 2701 2702 for (i = 0; i < adapter->req_rx_queues; i++) { 2703 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2704 data += ETH_GSTRING_LEN; 2705 2706 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2707 data += ETH_GSTRING_LEN; 2708 2709 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2710 data += ETH_GSTRING_LEN; 2711 } 2712 break; 2713 2714 case ETH_SS_PRIV_FLAGS: 2715 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2716 strcpy(data + i * ETH_GSTRING_LEN, 2717 ibmvnic_priv_flags[i]); 2718 break; 2719 default: 2720 return; 2721 } 2722 } 2723 2724 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2725 { 2726 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2727 2728 switch (sset) { 2729 case ETH_SS_STATS: 2730 return ARRAY_SIZE(ibmvnic_stats) + 2731 adapter->req_tx_queues * NUM_TX_STATS + 2732 adapter->req_rx_queues * NUM_RX_STATS; 2733 case ETH_SS_PRIV_FLAGS: 2734 return ARRAY_SIZE(ibmvnic_priv_flags); 2735 default: 2736 return -EOPNOTSUPP; 2737 } 2738 } 2739 2740 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2741 struct ethtool_stats *stats, u64 *data) 2742 { 2743 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2744 union ibmvnic_crq crq; 2745 int i, j; 2746 int rc; 2747 2748 memset(&crq, 0, sizeof(crq)); 2749 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2750 crq.request_statistics.cmd = REQUEST_STATISTICS; 2751 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2752 crq.request_statistics.len = 2753 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2754 2755 /* Wait for data to be written */ 2756 reinit_completion(&adapter->stats_done); 2757 rc = ibmvnic_send_crq(adapter, &crq); 2758 if (rc) 2759 return; 2760 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2761 if (rc) 2762 return; 2763 2764 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2765 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2766 ibmvnic_stats[i].offset)); 2767 2768 for (j = 0; j < adapter->req_tx_queues; j++) { 2769 data[i] = adapter->tx_stats_buffers[j].packets; 2770 i++; 2771 data[i] = adapter->tx_stats_buffers[j].bytes; 2772 i++; 2773 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2774 i++; 2775 } 2776 2777 for (j = 0; j < adapter->req_rx_queues; j++) { 2778 data[i] = adapter->rx_stats_buffers[j].packets; 2779 i++; 2780 data[i] = adapter->rx_stats_buffers[j].bytes; 2781 i++; 2782 data[i] = adapter->rx_stats_buffers[j].interrupts; 2783 i++; 2784 } 2785 } 2786 2787 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2788 { 2789 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2790 2791 return adapter->priv_flags; 2792 } 2793 2794 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2795 { 2796 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2797 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2798 2799 if (which_maxes) 2800 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2801 else 2802 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2803 2804 return 0; 2805 } 2806 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2807 .get_drvinfo = ibmvnic_get_drvinfo, 2808 .get_msglevel = ibmvnic_get_msglevel, 2809 .set_msglevel = ibmvnic_set_msglevel, 2810 .get_link = ibmvnic_get_link, 2811 .get_ringparam = ibmvnic_get_ringparam, 2812 .set_ringparam = ibmvnic_set_ringparam, 2813 .get_channels = ibmvnic_get_channels, 2814 .set_channels = ibmvnic_set_channels, 2815 .get_strings = ibmvnic_get_strings, 2816 .get_sset_count = ibmvnic_get_sset_count, 2817 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2818 .get_link_ksettings = ibmvnic_get_link_ksettings, 2819 .get_priv_flags = ibmvnic_get_priv_flags, 2820 .set_priv_flags = ibmvnic_set_priv_flags, 2821 }; 2822 2823 /* Routines for managing CRQs/sCRQs */ 2824 2825 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2826 struct ibmvnic_sub_crq_queue *scrq) 2827 { 2828 int rc; 2829 2830 if (scrq->irq) { 2831 free_irq(scrq->irq, scrq); 2832 irq_dispose_mapping(scrq->irq); 2833 scrq->irq = 0; 2834 } 2835 2836 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2837 atomic_set(&scrq->used, 0); 2838 scrq->cur = 0; 2839 2840 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2841 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2842 return rc; 2843 } 2844 2845 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2846 { 2847 int i, rc; 2848 2849 for (i = 0; i < adapter->req_tx_queues; i++) { 2850 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2851 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2852 if (rc) 2853 return rc; 2854 } 2855 2856 for (i = 0; i < adapter->req_rx_queues; i++) { 2857 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2858 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2859 if (rc) 2860 return rc; 2861 } 2862 2863 return rc; 2864 } 2865 2866 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2867 struct ibmvnic_sub_crq_queue *scrq, 2868 bool do_h_free) 2869 { 2870 struct device *dev = &adapter->vdev->dev; 2871 long rc; 2872 2873 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2874 2875 if (do_h_free) { 2876 /* Close the sub-crqs */ 2877 do { 2878 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2879 adapter->vdev->unit_address, 2880 scrq->crq_num); 2881 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2882 2883 if (rc) { 2884 netdev_err(adapter->netdev, 2885 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2886 scrq->crq_num, rc); 2887 } 2888 } 2889 2890 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2891 DMA_BIDIRECTIONAL); 2892 free_pages((unsigned long)scrq->msgs, 2); 2893 kfree(scrq); 2894 } 2895 2896 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2897 *adapter) 2898 { 2899 struct device *dev = &adapter->vdev->dev; 2900 struct ibmvnic_sub_crq_queue *scrq; 2901 int rc; 2902 2903 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2904 if (!scrq) 2905 return NULL; 2906 2907 scrq->msgs = 2908 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2909 if (!scrq->msgs) { 2910 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2911 goto zero_page_failed; 2912 } 2913 2914 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2915 DMA_BIDIRECTIONAL); 2916 if (dma_mapping_error(dev, scrq->msg_token)) { 2917 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2918 goto map_failed; 2919 } 2920 2921 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2922 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2923 2924 if (rc == H_RESOURCE) 2925 rc = ibmvnic_reset_crq(adapter); 2926 2927 if (rc == H_CLOSED) { 2928 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2929 } else if (rc) { 2930 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2931 goto reg_failed; 2932 } 2933 2934 scrq->adapter = adapter; 2935 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2936 spin_lock_init(&scrq->lock); 2937 2938 netdev_dbg(adapter->netdev, 2939 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2940 scrq->crq_num, scrq->hw_irq, scrq->irq); 2941 2942 return scrq; 2943 2944 reg_failed: 2945 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2946 DMA_BIDIRECTIONAL); 2947 map_failed: 2948 free_pages((unsigned long)scrq->msgs, 2); 2949 zero_page_failed: 2950 kfree(scrq); 2951 2952 return NULL; 2953 } 2954 2955 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2956 { 2957 int i; 2958 2959 if (adapter->tx_scrq) { 2960 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2961 if (!adapter->tx_scrq[i]) 2962 continue; 2963 2964 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2965 i); 2966 if (adapter->tx_scrq[i]->irq) { 2967 free_irq(adapter->tx_scrq[i]->irq, 2968 adapter->tx_scrq[i]); 2969 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2970 adapter->tx_scrq[i]->irq = 0; 2971 } 2972 2973 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2974 do_h_free); 2975 } 2976 2977 kfree(adapter->tx_scrq); 2978 adapter->tx_scrq = NULL; 2979 adapter->num_active_tx_scrqs = 0; 2980 } 2981 2982 if (adapter->rx_scrq) { 2983 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2984 if (!adapter->rx_scrq[i]) 2985 continue; 2986 2987 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2988 i); 2989 if (adapter->rx_scrq[i]->irq) { 2990 free_irq(adapter->rx_scrq[i]->irq, 2991 adapter->rx_scrq[i]); 2992 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2993 adapter->rx_scrq[i]->irq = 0; 2994 } 2995 2996 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2997 do_h_free); 2998 } 2999 3000 kfree(adapter->rx_scrq); 3001 adapter->rx_scrq = NULL; 3002 adapter->num_active_rx_scrqs = 0; 3003 } 3004 } 3005 3006 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3007 struct ibmvnic_sub_crq_queue *scrq) 3008 { 3009 struct device *dev = &adapter->vdev->dev; 3010 unsigned long rc; 3011 3012 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3013 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3014 if (rc) 3015 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3016 scrq->hw_irq, rc); 3017 return rc; 3018 } 3019 3020 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3021 struct ibmvnic_sub_crq_queue *scrq) 3022 { 3023 struct device *dev = &adapter->vdev->dev; 3024 unsigned long rc; 3025 3026 if (scrq->hw_irq > 0x100000000ULL) { 3027 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3028 return 1; 3029 } 3030 3031 if (test_bit(0, &adapter->resetting) && 3032 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3033 u64 val = (0xff000000) | scrq->hw_irq; 3034 3035 rc = plpar_hcall_norets(H_EOI, val); 3036 /* H_EOI would fail with rc = H_FUNCTION when running 3037 * in XIVE mode which is expected, but not an error. 3038 */ 3039 if (rc && (rc != H_FUNCTION)) 3040 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3041 val, rc); 3042 } 3043 3044 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3045 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3046 if (rc) 3047 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3048 scrq->hw_irq, rc); 3049 return rc; 3050 } 3051 3052 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3053 struct ibmvnic_sub_crq_queue *scrq) 3054 { 3055 struct device *dev = &adapter->vdev->dev; 3056 struct ibmvnic_tx_pool *tx_pool; 3057 struct ibmvnic_tx_buff *txbuff; 3058 union sub_crq *next; 3059 int index; 3060 int i, j; 3061 3062 restart_loop: 3063 while (pending_scrq(adapter, scrq)) { 3064 unsigned int pool = scrq->pool_index; 3065 int num_entries = 0; 3066 3067 next = ibmvnic_next_scrq(adapter, scrq); 3068 for (i = 0; i < next->tx_comp.num_comps; i++) { 3069 if (next->tx_comp.rcs[i]) { 3070 dev_err(dev, "tx error %x\n", 3071 next->tx_comp.rcs[i]); 3072 continue; 3073 } 3074 index = be32_to_cpu(next->tx_comp.correlators[i]); 3075 if (index & IBMVNIC_TSO_POOL_MASK) { 3076 tx_pool = &adapter->tso_pool[pool]; 3077 index &= ~IBMVNIC_TSO_POOL_MASK; 3078 } else { 3079 tx_pool = &adapter->tx_pool[pool]; 3080 } 3081 3082 txbuff = &tx_pool->tx_buff[index]; 3083 3084 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 3085 if (!txbuff->data_dma[j]) 3086 continue; 3087 3088 txbuff->data_dma[j] = 0; 3089 } 3090 3091 if (txbuff->last_frag) { 3092 dev_kfree_skb_any(txbuff->skb); 3093 txbuff->skb = NULL; 3094 } 3095 3096 num_entries += txbuff->num_entries; 3097 3098 tx_pool->free_map[tx_pool->producer_index] = index; 3099 tx_pool->producer_index = 3100 (tx_pool->producer_index + 1) % 3101 tx_pool->num_buffers; 3102 } 3103 /* remove tx_comp scrq*/ 3104 next->tx_comp.first = 0; 3105 3106 if (atomic_sub_return(num_entries, &scrq->used) <= 3107 (adapter->req_tx_entries_per_subcrq / 2) && 3108 __netif_subqueue_stopped(adapter->netdev, 3109 scrq->pool_index)) { 3110 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3111 netdev_dbg(adapter->netdev, "Started queue %d\n", 3112 scrq->pool_index); 3113 } 3114 } 3115 3116 enable_scrq_irq(adapter, scrq); 3117 3118 if (pending_scrq(adapter, scrq)) { 3119 disable_scrq_irq(adapter, scrq); 3120 goto restart_loop; 3121 } 3122 3123 return 0; 3124 } 3125 3126 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3127 { 3128 struct ibmvnic_sub_crq_queue *scrq = instance; 3129 struct ibmvnic_adapter *adapter = scrq->adapter; 3130 3131 disable_scrq_irq(adapter, scrq); 3132 ibmvnic_complete_tx(adapter, scrq); 3133 3134 return IRQ_HANDLED; 3135 } 3136 3137 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3138 { 3139 struct ibmvnic_sub_crq_queue *scrq = instance; 3140 struct ibmvnic_adapter *adapter = scrq->adapter; 3141 3142 /* When booting a kdump kernel we can hit pending interrupts 3143 * prior to completing driver initialization. 3144 */ 3145 if (unlikely(adapter->state != VNIC_OPEN)) 3146 return IRQ_NONE; 3147 3148 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3149 3150 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3151 disable_scrq_irq(adapter, scrq); 3152 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3153 } 3154 3155 return IRQ_HANDLED; 3156 } 3157 3158 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3159 { 3160 struct device *dev = &adapter->vdev->dev; 3161 struct ibmvnic_sub_crq_queue *scrq; 3162 int i = 0, j = 0; 3163 int rc = 0; 3164 3165 for (i = 0; i < adapter->req_tx_queues; i++) { 3166 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3167 i); 3168 scrq = adapter->tx_scrq[i]; 3169 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3170 3171 if (!scrq->irq) { 3172 rc = -EINVAL; 3173 dev_err(dev, "Error mapping irq\n"); 3174 goto req_tx_irq_failed; 3175 } 3176 3177 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3178 adapter->vdev->unit_address, i); 3179 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3180 0, scrq->name, scrq); 3181 3182 if (rc) { 3183 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3184 scrq->irq, rc); 3185 irq_dispose_mapping(scrq->irq); 3186 goto req_tx_irq_failed; 3187 } 3188 } 3189 3190 for (i = 0; i < adapter->req_rx_queues; i++) { 3191 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3192 i); 3193 scrq = adapter->rx_scrq[i]; 3194 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3195 if (!scrq->irq) { 3196 rc = -EINVAL; 3197 dev_err(dev, "Error mapping irq\n"); 3198 goto req_rx_irq_failed; 3199 } 3200 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3201 adapter->vdev->unit_address, i); 3202 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3203 0, scrq->name, scrq); 3204 if (rc) { 3205 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3206 scrq->irq, rc); 3207 irq_dispose_mapping(scrq->irq); 3208 goto req_rx_irq_failed; 3209 } 3210 } 3211 return rc; 3212 3213 req_rx_irq_failed: 3214 for (j = 0; j < i; j++) { 3215 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3216 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3217 } 3218 i = adapter->req_tx_queues; 3219 req_tx_irq_failed: 3220 for (j = 0; j < i; j++) { 3221 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3222 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3223 } 3224 release_sub_crqs(adapter, 1); 3225 return rc; 3226 } 3227 3228 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3229 { 3230 struct device *dev = &adapter->vdev->dev; 3231 struct ibmvnic_sub_crq_queue **allqueues; 3232 int registered_queues = 0; 3233 int total_queues; 3234 int more = 0; 3235 int i; 3236 3237 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3238 3239 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3240 if (!allqueues) 3241 return -1; 3242 3243 for (i = 0; i < total_queues; i++) { 3244 allqueues[i] = init_sub_crq_queue(adapter); 3245 if (!allqueues[i]) { 3246 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3247 break; 3248 } 3249 registered_queues++; 3250 } 3251 3252 /* Make sure we were able to register the minimum number of queues */ 3253 if (registered_queues < 3254 adapter->min_tx_queues + adapter->min_rx_queues) { 3255 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3256 goto tx_failed; 3257 } 3258 3259 /* Distribute the failed allocated queues*/ 3260 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3261 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3262 switch (i % 3) { 3263 case 0: 3264 if (adapter->req_rx_queues > adapter->min_rx_queues) 3265 adapter->req_rx_queues--; 3266 else 3267 more++; 3268 break; 3269 case 1: 3270 if (adapter->req_tx_queues > adapter->min_tx_queues) 3271 adapter->req_tx_queues--; 3272 else 3273 more++; 3274 break; 3275 } 3276 } 3277 3278 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3279 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3280 if (!adapter->tx_scrq) 3281 goto tx_failed; 3282 3283 for (i = 0; i < adapter->req_tx_queues; i++) { 3284 adapter->tx_scrq[i] = allqueues[i]; 3285 adapter->tx_scrq[i]->pool_index = i; 3286 adapter->num_active_tx_scrqs++; 3287 } 3288 3289 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3290 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3291 if (!adapter->rx_scrq) 3292 goto rx_failed; 3293 3294 for (i = 0; i < adapter->req_rx_queues; i++) { 3295 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3296 adapter->rx_scrq[i]->scrq_num = i; 3297 adapter->num_active_rx_scrqs++; 3298 } 3299 3300 kfree(allqueues); 3301 return 0; 3302 3303 rx_failed: 3304 kfree(adapter->tx_scrq); 3305 adapter->tx_scrq = NULL; 3306 tx_failed: 3307 for (i = 0; i < registered_queues; i++) 3308 release_sub_crq_queue(adapter, allqueues[i], 1); 3309 kfree(allqueues); 3310 return -1; 3311 } 3312 3313 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3314 { 3315 struct device *dev = &adapter->vdev->dev; 3316 union ibmvnic_crq crq; 3317 int max_entries; 3318 3319 if (!retry) { 3320 /* Sub-CRQ entries are 32 byte long */ 3321 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3322 3323 if (adapter->min_tx_entries_per_subcrq > entries_page || 3324 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3325 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3326 return; 3327 } 3328 3329 if (adapter->desired.mtu) 3330 adapter->req_mtu = adapter->desired.mtu; 3331 else 3332 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3333 3334 if (!adapter->desired.tx_entries) 3335 adapter->desired.tx_entries = 3336 adapter->max_tx_entries_per_subcrq; 3337 if (!adapter->desired.rx_entries) 3338 adapter->desired.rx_entries = 3339 adapter->max_rx_add_entries_per_subcrq; 3340 3341 max_entries = IBMVNIC_MAX_LTB_SIZE / 3342 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3343 3344 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3345 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3346 adapter->desired.tx_entries = max_entries; 3347 } 3348 3349 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3350 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3351 adapter->desired.rx_entries = max_entries; 3352 } 3353 3354 if (adapter->desired.tx_entries) 3355 adapter->req_tx_entries_per_subcrq = 3356 adapter->desired.tx_entries; 3357 else 3358 adapter->req_tx_entries_per_subcrq = 3359 adapter->max_tx_entries_per_subcrq; 3360 3361 if (adapter->desired.rx_entries) 3362 adapter->req_rx_add_entries_per_subcrq = 3363 adapter->desired.rx_entries; 3364 else 3365 adapter->req_rx_add_entries_per_subcrq = 3366 adapter->max_rx_add_entries_per_subcrq; 3367 3368 if (adapter->desired.tx_queues) 3369 adapter->req_tx_queues = 3370 adapter->desired.tx_queues; 3371 else 3372 adapter->req_tx_queues = 3373 adapter->opt_tx_comp_sub_queues; 3374 3375 if (adapter->desired.rx_queues) 3376 adapter->req_rx_queues = 3377 adapter->desired.rx_queues; 3378 else 3379 adapter->req_rx_queues = 3380 adapter->opt_rx_comp_queues; 3381 3382 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3383 } 3384 3385 memset(&crq, 0, sizeof(crq)); 3386 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3387 crq.request_capability.cmd = REQUEST_CAPABILITY; 3388 3389 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3390 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3391 atomic_inc(&adapter->running_cap_crqs); 3392 ibmvnic_send_crq(adapter, &crq); 3393 3394 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3395 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3396 atomic_inc(&adapter->running_cap_crqs); 3397 ibmvnic_send_crq(adapter, &crq); 3398 3399 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3400 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3401 atomic_inc(&adapter->running_cap_crqs); 3402 ibmvnic_send_crq(adapter, &crq); 3403 3404 crq.request_capability.capability = 3405 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3406 crq.request_capability.number = 3407 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3408 atomic_inc(&adapter->running_cap_crqs); 3409 ibmvnic_send_crq(adapter, &crq); 3410 3411 crq.request_capability.capability = 3412 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3413 crq.request_capability.number = 3414 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3415 atomic_inc(&adapter->running_cap_crqs); 3416 ibmvnic_send_crq(adapter, &crq); 3417 3418 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3419 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3420 atomic_inc(&adapter->running_cap_crqs); 3421 ibmvnic_send_crq(adapter, &crq); 3422 3423 if (adapter->netdev->flags & IFF_PROMISC) { 3424 if (adapter->promisc_supported) { 3425 crq.request_capability.capability = 3426 cpu_to_be16(PROMISC_REQUESTED); 3427 crq.request_capability.number = cpu_to_be64(1); 3428 atomic_inc(&adapter->running_cap_crqs); 3429 ibmvnic_send_crq(adapter, &crq); 3430 } 3431 } else { 3432 crq.request_capability.capability = 3433 cpu_to_be16(PROMISC_REQUESTED); 3434 crq.request_capability.number = cpu_to_be64(0); 3435 atomic_inc(&adapter->running_cap_crqs); 3436 ibmvnic_send_crq(adapter, &crq); 3437 } 3438 } 3439 3440 static int pending_scrq(struct ibmvnic_adapter *adapter, 3441 struct ibmvnic_sub_crq_queue *scrq) 3442 { 3443 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3444 3445 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3446 return 1; 3447 else 3448 return 0; 3449 } 3450 3451 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3452 struct ibmvnic_sub_crq_queue *scrq) 3453 { 3454 union sub_crq *entry; 3455 unsigned long flags; 3456 3457 spin_lock_irqsave(&scrq->lock, flags); 3458 entry = &scrq->msgs[scrq->cur]; 3459 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3460 if (++scrq->cur == scrq->size) 3461 scrq->cur = 0; 3462 } else { 3463 entry = NULL; 3464 } 3465 spin_unlock_irqrestore(&scrq->lock, flags); 3466 3467 return entry; 3468 } 3469 3470 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3471 { 3472 struct ibmvnic_crq_queue *queue = &adapter->crq; 3473 union ibmvnic_crq *crq; 3474 3475 crq = &queue->msgs[queue->cur]; 3476 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3477 if (++queue->cur == queue->size) 3478 queue->cur = 0; 3479 } else { 3480 crq = NULL; 3481 } 3482 3483 return crq; 3484 } 3485 3486 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3487 { 3488 switch (rc) { 3489 case H_PARAMETER: 3490 dev_warn_ratelimited(dev, 3491 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3492 func, rc); 3493 break; 3494 case H_CLOSED: 3495 dev_warn_ratelimited(dev, 3496 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3497 func, rc); 3498 break; 3499 default: 3500 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3501 break; 3502 } 3503 } 3504 3505 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3506 union sub_crq *sub_crq) 3507 { 3508 unsigned int ua = adapter->vdev->unit_address; 3509 struct device *dev = &adapter->vdev->dev; 3510 u64 *u64_crq = (u64 *)sub_crq; 3511 int rc; 3512 3513 netdev_dbg(adapter->netdev, 3514 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3515 (unsigned long int)cpu_to_be64(remote_handle), 3516 (unsigned long int)cpu_to_be64(u64_crq[0]), 3517 (unsigned long int)cpu_to_be64(u64_crq[1]), 3518 (unsigned long int)cpu_to_be64(u64_crq[2]), 3519 (unsigned long int)cpu_to_be64(u64_crq[3])); 3520 3521 /* Make sure the hypervisor sees the complete request */ 3522 mb(); 3523 3524 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3525 cpu_to_be64(remote_handle), 3526 cpu_to_be64(u64_crq[0]), 3527 cpu_to_be64(u64_crq[1]), 3528 cpu_to_be64(u64_crq[2]), 3529 cpu_to_be64(u64_crq[3])); 3530 3531 if (rc) 3532 print_subcrq_error(dev, rc, __func__); 3533 3534 return rc; 3535 } 3536 3537 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3538 u64 remote_handle, u64 ioba, u64 num_entries) 3539 { 3540 unsigned int ua = adapter->vdev->unit_address; 3541 struct device *dev = &adapter->vdev->dev; 3542 int rc; 3543 3544 /* Make sure the hypervisor sees the complete request */ 3545 mb(); 3546 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3547 cpu_to_be64(remote_handle), 3548 ioba, num_entries); 3549 3550 if (rc) 3551 print_subcrq_error(dev, rc, __func__); 3552 3553 return rc; 3554 } 3555 3556 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3557 union ibmvnic_crq *crq) 3558 { 3559 unsigned int ua = adapter->vdev->unit_address; 3560 struct device *dev = &adapter->vdev->dev; 3561 u64 *u64_crq = (u64 *)crq; 3562 int rc; 3563 3564 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3565 (unsigned long int)cpu_to_be64(u64_crq[0]), 3566 (unsigned long int)cpu_to_be64(u64_crq[1])); 3567 3568 if (!adapter->crq.active && 3569 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3570 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3571 return -EINVAL; 3572 } 3573 3574 /* Make sure the hypervisor sees the complete request */ 3575 mb(); 3576 3577 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3578 cpu_to_be64(u64_crq[0]), 3579 cpu_to_be64(u64_crq[1])); 3580 3581 if (rc) { 3582 if (rc == H_CLOSED) { 3583 dev_warn(dev, "CRQ Queue closed\n"); 3584 if (test_bit(0, &adapter->resetting)) 3585 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3586 } 3587 3588 dev_warn(dev, "Send error (rc=%d)\n", rc); 3589 } 3590 3591 return rc; 3592 } 3593 3594 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3595 { 3596 union ibmvnic_crq crq; 3597 3598 memset(&crq, 0, sizeof(crq)); 3599 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3600 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3601 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3602 3603 return ibmvnic_send_crq(adapter, &crq); 3604 } 3605 3606 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3607 { 3608 union ibmvnic_crq crq; 3609 3610 memset(&crq, 0, sizeof(crq)); 3611 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3612 crq.version_exchange.cmd = VERSION_EXCHANGE; 3613 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3614 3615 return ibmvnic_send_crq(adapter, &crq); 3616 } 3617 3618 struct vnic_login_client_data { 3619 u8 type; 3620 __be16 len; 3621 char name[]; 3622 } __packed; 3623 3624 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3625 { 3626 int len; 3627 3628 /* Calculate the amount of buffer space needed for the 3629 * vnic client data in the login buffer. There are four entries, 3630 * OS name, LPAR name, device name, and a null last entry. 3631 */ 3632 len = 4 * sizeof(struct vnic_login_client_data); 3633 len += 6; /* "Linux" plus NULL */ 3634 len += strlen(utsname()->nodename) + 1; 3635 len += strlen(adapter->netdev->name) + 1; 3636 3637 return len; 3638 } 3639 3640 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3641 struct vnic_login_client_data *vlcd) 3642 { 3643 const char *os_name = "Linux"; 3644 int len; 3645 3646 /* Type 1 - LPAR OS */ 3647 vlcd->type = 1; 3648 len = strlen(os_name) + 1; 3649 vlcd->len = cpu_to_be16(len); 3650 strncpy(vlcd->name, os_name, len); 3651 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3652 3653 /* Type 2 - LPAR name */ 3654 vlcd->type = 2; 3655 len = strlen(utsname()->nodename) + 1; 3656 vlcd->len = cpu_to_be16(len); 3657 strncpy(vlcd->name, utsname()->nodename, len); 3658 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3659 3660 /* Type 3 - device name */ 3661 vlcd->type = 3; 3662 len = strlen(adapter->netdev->name) + 1; 3663 vlcd->len = cpu_to_be16(len); 3664 strncpy(vlcd->name, adapter->netdev->name, len); 3665 } 3666 3667 static int send_login(struct ibmvnic_adapter *adapter) 3668 { 3669 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3670 struct ibmvnic_login_buffer *login_buffer; 3671 struct device *dev = &adapter->vdev->dev; 3672 dma_addr_t rsp_buffer_token; 3673 dma_addr_t buffer_token; 3674 size_t rsp_buffer_size; 3675 union ibmvnic_crq crq; 3676 size_t buffer_size; 3677 __be64 *tx_list_p; 3678 __be64 *rx_list_p; 3679 int client_data_len; 3680 struct vnic_login_client_data *vlcd; 3681 int i; 3682 3683 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3684 netdev_err(adapter->netdev, 3685 "RX or TX queues are not allocated, device login failed\n"); 3686 return -1; 3687 } 3688 3689 release_login_rsp_buffer(adapter); 3690 client_data_len = vnic_client_data_len(adapter); 3691 3692 buffer_size = 3693 sizeof(struct ibmvnic_login_buffer) + 3694 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3695 client_data_len; 3696 3697 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3698 if (!login_buffer) 3699 goto buf_alloc_failed; 3700 3701 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3702 DMA_TO_DEVICE); 3703 if (dma_mapping_error(dev, buffer_token)) { 3704 dev_err(dev, "Couldn't map login buffer\n"); 3705 goto buf_map_failed; 3706 } 3707 3708 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3709 sizeof(u64) * adapter->req_tx_queues + 3710 sizeof(u64) * adapter->req_rx_queues + 3711 sizeof(u64) * adapter->req_rx_queues + 3712 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3713 3714 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3715 if (!login_rsp_buffer) 3716 goto buf_rsp_alloc_failed; 3717 3718 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3719 rsp_buffer_size, DMA_FROM_DEVICE); 3720 if (dma_mapping_error(dev, rsp_buffer_token)) { 3721 dev_err(dev, "Couldn't map login rsp buffer\n"); 3722 goto buf_rsp_map_failed; 3723 } 3724 3725 adapter->login_buf = login_buffer; 3726 adapter->login_buf_token = buffer_token; 3727 adapter->login_buf_sz = buffer_size; 3728 adapter->login_rsp_buf = login_rsp_buffer; 3729 adapter->login_rsp_buf_token = rsp_buffer_token; 3730 adapter->login_rsp_buf_sz = rsp_buffer_size; 3731 3732 login_buffer->len = cpu_to_be32(buffer_size); 3733 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3734 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3735 login_buffer->off_txcomp_subcrqs = 3736 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3737 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3738 login_buffer->off_rxcomp_subcrqs = 3739 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3740 sizeof(u64) * adapter->req_tx_queues); 3741 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3742 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3743 3744 tx_list_p = (__be64 *)((char *)login_buffer + 3745 sizeof(struct ibmvnic_login_buffer)); 3746 rx_list_p = (__be64 *)((char *)login_buffer + 3747 sizeof(struct ibmvnic_login_buffer) + 3748 sizeof(u64) * adapter->req_tx_queues); 3749 3750 for (i = 0; i < adapter->req_tx_queues; i++) { 3751 if (adapter->tx_scrq[i]) { 3752 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3753 crq_num); 3754 } 3755 } 3756 3757 for (i = 0; i < adapter->req_rx_queues; i++) { 3758 if (adapter->rx_scrq[i]) { 3759 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3760 crq_num); 3761 } 3762 } 3763 3764 /* Insert vNIC login client data */ 3765 vlcd = (struct vnic_login_client_data *) 3766 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3767 login_buffer->client_data_offset = 3768 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3769 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3770 3771 vnic_add_client_data(adapter, vlcd); 3772 3773 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3774 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3775 netdev_dbg(adapter->netdev, "%016lx\n", 3776 ((unsigned long int *)(adapter->login_buf))[i]); 3777 } 3778 3779 memset(&crq, 0, sizeof(crq)); 3780 crq.login.first = IBMVNIC_CRQ_CMD; 3781 crq.login.cmd = LOGIN; 3782 crq.login.ioba = cpu_to_be32(buffer_token); 3783 crq.login.len = cpu_to_be32(buffer_size); 3784 ibmvnic_send_crq(adapter, &crq); 3785 3786 return 0; 3787 3788 buf_rsp_map_failed: 3789 kfree(login_rsp_buffer); 3790 buf_rsp_alloc_failed: 3791 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3792 buf_map_failed: 3793 kfree(login_buffer); 3794 buf_alloc_failed: 3795 return -1; 3796 } 3797 3798 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3799 u32 len, u8 map_id) 3800 { 3801 union ibmvnic_crq crq; 3802 3803 memset(&crq, 0, sizeof(crq)); 3804 crq.request_map.first = IBMVNIC_CRQ_CMD; 3805 crq.request_map.cmd = REQUEST_MAP; 3806 crq.request_map.map_id = map_id; 3807 crq.request_map.ioba = cpu_to_be32(addr); 3808 crq.request_map.len = cpu_to_be32(len); 3809 return ibmvnic_send_crq(adapter, &crq); 3810 } 3811 3812 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3813 { 3814 union ibmvnic_crq crq; 3815 3816 memset(&crq, 0, sizeof(crq)); 3817 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3818 crq.request_unmap.cmd = REQUEST_UNMAP; 3819 crq.request_unmap.map_id = map_id; 3820 return ibmvnic_send_crq(adapter, &crq); 3821 } 3822 3823 static void send_map_query(struct ibmvnic_adapter *adapter) 3824 { 3825 union ibmvnic_crq crq; 3826 3827 memset(&crq, 0, sizeof(crq)); 3828 crq.query_map.first = IBMVNIC_CRQ_CMD; 3829 crq.query_map.cmd = QUERY_MAP; 3830 ibmvnic_send_crq(adapter, &crq); 3831 } 3832 3833 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3834 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3835 { 3836 union ibmvnic_crq crq; 3837 3838 atomic_set(&adapter->running_cap_crqs, 0); 3839 memset(&crq, 0, sizeof(crq)); 3840 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3841 crq.query_capability.cmd = QUERY_CAPABILITY; 3842 3843 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3844 atomic_inc(&adapter->running_cap_crqs); 3845 ibmvnic_send_crq(adapter, &crq); 3846 3847 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3848 atomic_inc(&adapter->running_cap_crqs); 3849 ibmvnic_send_crq(adapter, &crq); 3850 3851 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3852 atomic_inc(&adapter->running_cap_crqs); 3853 ibmvnic_send_crq(adapter, &crq); 3854 3855 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3856 atomic_inc(&adapter->running_cap_crqs); 3857 ibmvnic_send_crq(adapter, &crq); 3858 3859 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3860 atomic_inc(&adapter->running_cap_crqs); 3861 ibmvnic_send_crq(adapter, &crq); 3862 3863 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3864 atomic_inc(&adapter->running_cap_crqs); 3865 ibmvnic_send_crq(adapter, &crq); 3866 3867 crq.query_capability.capability = 3868 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3869 atomic_inc(&adapter->running_cap_crqs); 3870 ibmvnic_send_crq(adapter, &crq); 3871 3872 crq.query_capability.capability = 3873 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3874 atomic_inc(&adapter->running_cap_crqs); 3875 ibmvnic_send_crq(adapter, &crq); 3876 3877 crq.query_capability.capability = 3878 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3879 atomic_inc(&adapter->running_cap_crqs); 3880 ibmvnic_send_crq(adapter, &crq); 3881 3882 crq.query_capability.capability = 3883 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3884 atomic_inc(&adapter->running_cap_crqs); 3885 ibmvnic_send_crq(adapter, &crq); 3886 3887 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3888 atomic_inc(&adapter->running_cap_crqs); 3889 ibmvnic_send_crq(adapter, &crq); 3890 3891 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3892 atomic_inc(&adapter->running_cap_crqs); 3893 ibmvnic_send_crq(adapter, &crq); 3894 3895 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3896 atomic_inc(&adapter->running_cap_crqs); 3897 ibmvnic_send_crq(adapter, &crq); 3898 3899 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3900 atomic_inc(&adapter->running_cap_crqs); 3901 ibmvnic_send_crq(adapter, &crq); 3902 3903 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3904 atomic_inc(&adapter->running_cap_crqs); 3905 ibmvnic_send_crq(adapter, &crq); 3906 3907 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3908 atomic_inc(&adapter->running_cap_crqs); 3909 ibmvnic_send_crq(adapter, &crq); 3910 3911 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3912 atomic_inc(&adapter->running_cap_crqs); 3913 ibmvnic_send_crq(adapter, &crq); 3914 3915 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3916 atomic_inc(&adapter->running_cap_crqs); 3917 ibmvnic_send_crq(adapter, &crq); 3918 3919 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3920 atomic_inc(&adapter->running_cap_crqs); 3921 ibmvnic_send_crq(adapter, &crq); 3922 3923 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3924 atomic_inc(&adapter->running_cap_crqs); 3925 ibmvnic_send_crq(adapter, &crq); 3926 3927 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3928 atomic_inc(&adapter->running_cap_crqs); 3929 ibmvnic_send_crq(adapter, &crq); 3930 3931 crq.query_capability.capability = 3932 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3933 atomic_inc(&adapter->running_cap_crqs); 3934 ibmvnic_send_crq(adapter, &crq); 3935 3936 crq.query_capability.capability = 3937 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3938 atomic_inc(&adapter->running_cap_crqs); 3939 ibmvnic_send_crq(adapter, &crq); 3940 3941 crq.query_capability.capability = 3942 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3943 atomic_inc(&adapter->running_cap_crqs); 3944 ibmvnic_send_crq(adapter, &crq); 3945 3946 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3947 atomic_inc(&adapter->running_cap_crqs); 3948 ibmvnic_send_crq(adapter, &crq); 3949 } 3950 3951 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3952 struct ibmvnic_adapter *adapter) 3953 { 3954 struct device *dev = &adapter->vdev->dev; 3955 3956 if (crq->get_vpd_size_rsp.rc.code) { 3957 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3958 crq->get_vpd_size_rsp.rc.code); 3959 complete(&adapter->fw_done); 3960 return; 3961 } 3962 3963 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3964 complete(&adapter->fw_done); 3965 } 3966 3967 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3968 struct ibmvnic_adapter *adapter) 3969 { 3970 struct device *dev = &adapter->vdev->dev; 3971 unsigned char *substr = NULL; 3972 u8 fw_level_len = 0; 3973 3974 memset(adapter->fw_version, 0, 32); 3975 3976 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3977 DMA_FROM_DEVICE); 3978 3979 if (crq->get_vpd_rsp.rc.code) { 3980 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3981 crq->get_vpd_rsp.rc.code); 3982 goto complete; 3983 } 3984 3985 /* get the position of the firmware version info 3986 * located after the ASCII 'RM' substring in the buffer 3987 */ 3988 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3989 if (!substr) { 3990 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3991 goto complete; 3992 } 3993 3994 /* get length of firmware level ASCII substring */ 3995 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3996 fw_level_len = *(substr + 2); 3997 } else { 3998 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3999 goto complete; 4000 } 4001 4002 /* copy firmware version string from vpd into adapter */ 4003 if ((substr + 3 + fw_level_len) < 4004 (adapter->vpd->buff + adapter->vpd->len)) { 4005 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4006 } else { 4007 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4008 } 4009 4010 complete: 4011 if (adapter->fw_version[0] == '\0') 4012 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4013 complete(&adapter->fw_done); 4014 } 4015 4016 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4017 { 4018 struct device *dev = &adapter->vdev->dev; 4019 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4020 netdev_features_t old_hw_features = 0; 4021 union ibmvnic_crq crq; 4022 int i; 4023 4024 dma_unmap_single(dev, adapter->ip_offload_tok, 4025 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4026 4027 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4028 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4029 netdev_dbg(adapter->netdev, "%016lx\n", 4030 ((unsigned long int *)(buf))[i]); 4031 4032 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4033 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4034 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4035 buf->tcp_ipv4_chksum); 4036 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4037 buf->tcp_ipv6_chksum); 4038 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4039 buf->udp_ipv4_chksum); 4040 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4041 buf->udp_ipv6_chksum); 4042 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4043 buf->large_tx_ipv4); 4044 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4045 buf->large_tx_ipv6); 4046 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4047 buf->large_rx_ipv4); 4048 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4049 buf->large_rx_ipv6); 4050 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4051 buf->max_ipv4_header_size); 4052 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4053 buf->max_ipv6_header_size); 4054 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4055 buf->max_tcp_header_size); 4056 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4057 buf->max_udp_header_size); 4058 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4059 buf->max_large_tx_size); 4060 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4061 buf->max_large_rx_size); 4062 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4063 buf->ipv6_extension_header); 4064 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4065 buf->tcp_pseudosum_req); 4066 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4067 buf->num_ipv6_ext_headers); 4068 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4069 buf->off_ipv6_ext_headers); 4070 4071 adapter->ip_offload_ctrl_tok = 4072 dma_map_single(dev, &adapter->ip_offload_ctrl, 4073 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 4074 4075 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4076 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4077 return; 4078 } 4079 4080 adapter->ip_offload_ctrl.len = 4081 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4082 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 4083 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 4084 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 4085 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4086 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 4087 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4088 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 4089 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 4090 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 4091 4092 /* large_rx disabled for now, additional features needed */ 4093 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 4094 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 4095 4096 if (adapter->state != VNIC_PROBING) { 4097 old_hw_features = adapter->netdev->hw_features; 4098 adapter->netdev->hw_features = 0; 4099 } 4100 4101 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4102 4103 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4104 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4105 4106 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4107 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4108 4109 if ((adapter->netdev->features & 4110 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4111 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4112 4113 if (buf->large_tx_ipv4) 4114 adapter->netdev->hw_features |= NETIF_F_TSO; 4115 if (buf->large_tx_ipv6) 4116 adapter->netdev->hw_features |= NETIF_F_TSO6; 4117 4118 if (adapter->state == VNIC_PROBING) { 4119 adapter->netdev->features |= adapter->netdev->hw_features; 4120 } else if (old_hw_features != adapter->netdev->hw_features) { 4121 netdev_features_t tmp = 0; 4122 4123 /* disable features no longer supported */ 4124 adapter->netdev->features &= adapter->netdev->hw_features; 4125 /* turn on features now supported if previously enabled */ 4126 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4127 adapter->netdev->hw_features; 4128 adapter->netdev->features |= 4129 tmp & adapter->netdev->wanted_features; 4130 } 4131 4132 memset(&crq, 0, sizeof(crq)); 4133 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4134 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4135 crq.control_ip_offload.len = 4136 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4137 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4138 ibmvnic_send_crq(adapter, &crq); 4139 } 4140 4141 static const char *ibmvnic_fw_err_cause(u16 cause) 4142 { 4143 switch (cause) { 4144 case ADAPTER_PROBLEM: 4145 return "adapter problem"; 4146 case BUS_PROBLEM: 4147 return "bus problem"; 4148 case FW_PROBLEM: 4149 return "firmware problem"; 4150 case DD_PROBLEM: 4151 return "device driver problem"; 4152 case EEH_RECOVERY: 4153 return "EEH recovery"; 4154 case FW_UPDATED: 4155 return "firmware updated"; 4156 case LOW_MEMORY: 4157 return "low Memory"; 4158 default: 4159 return "unknown"; 4160 } 4161 } 4162 4163 static void handle_error_indication(union ibmvnic_crq *crq, 4164 struct ibmvnic_adapter *adapter) 4165 { 4166 struct device *dev = &adapter->vdev->dev; 4167 u16 cause; 4168 4169 cause = be16_to_cpu(crq->error_indication.error_cause); 4170 4171 dev_warn_ratelimited(dev, 4172 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4173 crq->error_indication.flags 4174 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4175 ibmvnic_fw_err_cause(cause)); 4176 4177 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4178 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4179 else 4180 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4181 } 4182 4183 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4184 struct ibmvnic_adapter *adapter) 4185 { 4186 struct net_device *netdev = adapter->netdev; 4187 struct device *dev = &adapter->vdev->dev; 4188 long rc; 4189 4190 rc = crq->change_mac_addr_rsp.rc.code; 4191 if (rc) { 4192 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4193 goto out; 4194 } 4195 ether_addr_copy(netdev->dev_addr, 4196 &crq->change_mac_addr_rsp.mac_addr[0]); 4197 out: 4198 complete(&adapter->fw_done); 4199 return rc; 4200 } 4201 4202 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4203 struct ibmvnic_adapter *adapter) 4204 { 4205 struct device *dev = &adapter->vdev->dev; 4206 u64 *req_value; 4207 char *name; 4208 4209 atomic_dec(&adapter->running_cap_crqs); 4210 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4211 case REQ_TX_QUEUES: 4212 req_value = &adapter->req_tx_queues; 4213 name = "tx"; 4214 break; 4215 case REQ_RX_QUEUES: 4216 req_value = &adapter->req_rx_queues; 4217 name = "rx"; 4218 break; 4219 case REQ_RX_ADD_QUEUES: 4220 req_value = &adapter->req_rx_add_queues; 4221 name = "rx_add"; 4222 break; 4223 case REQ_TX_ENTRIES_PER_SUBCRQ: 4224 req_value = &adapter->req_tx_entries_per_subcrq; 4225 name = "tx_entries_per_subcrq"; 4226 break; 4227 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4228 req_value = &adapter->req_rx_add_entries_per_subcrq; 4229 name = "rx_add_entries_per_subcrq"; 4230 break; 4231 case REQ_MTU: 4232 req_value = &adapter->req_mtu; 4233 name = "mtu"; 4234 break; 4235 case PROMISC_REQUESTED: 4236 req_value = &adapter->promisc; 4237 name = "promisc"; 4238 break; 4239 default: 4240 dev_err(dev, "Got invalid cap request rsp %d\n", 4241 crq->request_capability.capability); 4242 return; 4243 } 4244 4245 switch (crq->request_capability_rsp.rc.code) { 4246 case SUCCESS: 4247 break; 4248 case PARTIALSUCCESS: 4249 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4250 *req_value, 4251 (long int)be64_to_cpu(crq->request_capability_rsp. 4252 number), name); 4253 4254 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4255 REQ_MTU) { 4256 pr_err("mtu of %llu is not supported. Reverting.\n", 4257 *req_value); 4258 *req_value = adapter->fallback.mtu; 4259 } else { 4260 *req_value = 4261 be64_to_cpu(crq->request_capability_rsp.number); 4262 } 4263 4264 ibmvnic_send_req_caps(adapter, 1); 4265 return; 4266 default: 4267 dev_err(dev, "Error %d in request cap rsp\n", 4268 crq->request_capability_rsp.rc.code); 4269 return; 4270 } 4271 4272 /* Done receiving requested capabilities, query IP offload support */ 4273 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4274 union ibmvnic_crq newcrq; 4275 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4276 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4277 &adapter->ip_offload_buf; 4278 4279 adapter->wait_capability = false; 4280 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4281 buf_sz, 4282 DMA_FROM_DEVICE); 4283 4284 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4285 if (!firmware_has_feature(FW_FEATURE_CMO)) 4286 dev_err(dev, "Couldn't map offload buffer\n"); 4287 return; 4288 } 4289 4290 memset(&newcrq, 0, sizeof(newcrq)); 4291 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4292 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4293 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4294 newcrq.query_ip_offload.ioba = 4295 cpu_to_be32(adapter->ip_offload_tok); 4296 4297 ibmvnic_send_crq(adapter, &newcrq); 4298 } 4299 } 4300 4301 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4302 struct ibmvnic_adapter *adapter) 4303 { 4304 struct device *dev = &adapter->vdev->dev; 4305 struct net_device *netdev = adapter->netdev; 4306 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4307 struct ibmvnic_login_buffer *login = adapter->login_buf; 4308 int i; 4309 4310 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4311 DMA_TO_DEVICE); 4312 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4313 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4314 4315 /* If the number of queues requested can't be allocated by the 4316 * server, the login response will return with code 1. We will need 4317 * to resend the login buffer with fewer queues requested. 4318 */ 4319 if (login_rsp_crq->generic.rc.code) { 4320 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4321 complete(&adapter->init_done); 4322 return 0; 4323 } 4324 4325 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4326 4327 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4328 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4329 netdev_dbg(adapter->netdev, "%016lx\n", 4330 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4331 } 4332 4333 /* Sanity checks */ 4334 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4335 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4336 adapter->req_rx_add_queues != 4337 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4338 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4339 ibmvnic_remove(adapter->vdev); 4340 return -EIO; 4341 } 4342 release_login_buffer(adapter); 4343 complete(&adapter->init_done); 4344 4345 return 0; 4346 } 4347 4348 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4349 struct ibmvnic_adapter *adapter) 4350 { 4351 struct device *dev = &adapter->vdev->dev; 4352 long rc; 4353 4354 rc = crq->request_unmap_rsp.rc.code; 4355 if (rc) 4356 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4357 } 4358 4359 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4360 struct ibmvnic_adapter *adapter) 4361 { 4362 struct net_device *netdev = adapter->netdev; 4363 struct device *dev = &adapter->vdev->dev; 4364 long rc; 4365 4366 rc = crq->query_map_rsp.rc.code; 4367 if (rc) { 4368 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4369 return; 4370 } 4371 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4372 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4373 crq->query_map_rsp.free_pages); 4374 } 4375 4376 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4377 struct ibmvnic_adapter *adapter) 4378 { 4379 struct net_device *netdev = adapter->netdev; 4380 struct device *dev = &adapter->vdev->dev; 4381 long rc; 4382 4383 atomic_dec(&adapter->running_cap_crqs); 4384 netdev_dbg(netdev, "Outstanding queries: %d\n", 4385 atomic_read(&adapter->running_cap_crqs)); 4386 rc = crq->query_capability.rc.code; 4387 if (rc) { 4388 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4389 goto out; 4390 } 4391 4392 switch (be16_to_cpu(crq->query_capability.capability)) { 4393 case MIN_TX_QUEUES: 4394 adapter->min_tx_queues = 4395 be64_to_cpu(crq->query_capability.number); 4396 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4397 adapter->min_tx_queues); 4398 break; 4399 case MIN_RX_QUEUES: 4400 adapter->min_rx_queues = 4401 be64_to_cpu(crq->query_capability.number); 4402 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4403 adapter->min_rx_queues); 4404 break; 4405 case MIN_RX_ADD_QUEUES: 4406 adapter->min_rx_add_queues = 4407 be64_to_cpu(crq->query_capability.number); 4408 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4409 adapter->min_rx_add_queues); 4410 break; 4411 case MAX_TX_QUEUES: 4412 adapter->max_tx_queues = 4413 be64_to_cpu(crq->query_capability.number); 4414 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4415 adapter->max_tx_queues); 4416 break; 4417 case MAX_RX_QUEUES: 4418 adapter->max_rx_queues = 4419 be64_to_cpu(crq->query_capability.number); 4420 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4421 adapter->max_rx_queues); 4422 break; 4423 case MAX_RX_ADD_QUEUES: 4424 adapter->max_rx_add_queues = 4425 be64_to_cpu(crq->query_capability.number); 4426 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4427 adapter->max_rx_add_queues); 4428 break; 4429 case MIN_TX_ENTRIES_PER_SUBCRQ: 4430 adapter->min_tx_entries_per_subcrq = 4431 be64_to_cpu(crq->query_capability.number); 4432 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4433 adapter->min_tx_entries_per_subcrq); 4434 break; 4435 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4436 adapter->min_rx_add_entries_per_subcrq = 4437 be64_to_cpu(crq->query_capability.number); 4438 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4439 adapter->min_rx_add_entries_per_subcrq); 4440 break; 4441 case MAX_TX_ENTRIES_PER_SUBCRQ: 4442 adapter->max_tx_entries_per_subcrq = 4443 be64_to_cpu(crq->query_capability.number); 4444 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4445 adapter->max_tx_entries_per_subcrq); 4446 break; 4447 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4448 adapter->max_rx_add_entries_per_subcrq = 4449 be64_to_cpu(crq->query_capability.number); 4450 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4451 adapter->max_rx_add_entries_per_subcrq); 4452 break; 4453 case TCP_IP_OFFLOAD: 4454 adapter->tcp_ip_offload = 4455 be64_to_cpu(crq->query_capability.number); 4456 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4457 adapter->tcp_ip_offload); 4458 break; 4459 case PROMISC_SUPPORTED: 4460 adapter->promisc_supported = 4461 be64_to_cpu(crq->query_capability.number); 4462 netdev_dbg(netdev, "promisc_supported = %lld\n", 4463 adapter->promisc_supported); 4464 break; 4465 case MIN_MTU: 4466 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4467 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4468 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4469 break; 4470 case MAX_MTU: 4471 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4472 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4473 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4474 break; 4475 case MAX_MULTICAST_FILTERS: 4476 adapter->max_multicast_filters = 4477 be64_to_cpu(crq->query_capability.number); 4478 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4479 adapter->max_multicast_filters); 4480 break; 4481 case VLAN_HEADER_INSERTION: 4482 adapter->vlan_header_insertion = 4483 be64_to_cpu(crq->query_capability.number); 4484 if (adapter->vlan_header_insertion) 4485 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4486 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4487 adapter->vlan_header_insertion); 4488 break; 4489 case RX_VLAN_HEADER_INSERTION: 4490 adapter->rx_vlan_header_insertion = 4491 be64_to_cpu(crq->query_capability.number); 4492 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4493 adapter->rx_vlan_header_insertion); 4494 break; 4495 case MAX_TX_SG_ENTRIES: 4496 adapter->max_tx_sg_entries = 4497 be64_to_cpu(crq->query_capability.number); 4498 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4499 adapter->max_tx_sg_entries); 4500 break; 4501 case RX_SG_SUPPORTED: 4502 adapter->rx_sg_supported = 4503 be64_to_cpu(crq->query_capability.number); 4504 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4505 adapter->rx_sg_supported); 4506 break; 4507 case OPT_TX_COMP_SUB_QUEUES: 4508 adapter->opt_tx_comp_sub_queues = 4509 be64_to_cpu(crq->query_capability.number); 4510 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4511 adapter->opt_tx_comp_sub_queues); 4512 break; 4513 case OPT_RX_COMP_QUEUES: 4514 adapter->opt_rx_comp_queues = 4515 be64_to_cpu(crq->query_capability.number); 4516 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4517 adapter->opt_rx_comp_queues); 4518 break; 4519 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4520 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4521 be64_to_cpu(crq->query_capability.number); 4522 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4523 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4524 break; 4525 case OPT_TX_ENTRIES_PER_SUBCRQ: 4526 adapter->opt_tx_entries_per_subcrq = 4527 be64_to_cpu(crq->query_capability.number); 4528 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4529 adapter->opt_tx_entries_per_subcrq); 4530 break; 4531 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4532 adapter->opt_rxba_entries_per_subcrq = 4533 be64_to_cpu(crq->query_capability.number); 4534 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4535 adapter->opt_rxba_entries_per_subcrq); 4536 break; 4537 case TX_RX_DESC_REQ: 4538 adapter->tx_rx_desc_req = crq->query_capability.number; 4539 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4540 adapter->tx_rx_desc_req); 4541 break; 4542 4543 default: 4544 netdev_err(netdev, "Got invalid cap rsp %d\n", 4545 crq->query_capability.capability); 4546 } 4547 4548 out: 4549 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4550 adapter->wait_capability = false; 4551 ibmvnic_send_req_caps(adapter, 0); 4552 } 4553 } 4554 4555 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4556 { 4557 union ibmvnic_crq crq; 4558 int rc; 4559 4560 memset(&crq, 0, sizeof(crq)); 4561 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4562 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4563 4564 mutex_lock(&adapter->fw_lock); 4565 adapter->fw_done_rc = 0; 4566 reinit_completion(&adapter->fw_done); 4567 4568 rc = ibmvnic_send_crq(adapter, &crq); 4569 if (rc) { 4570 mutex_unlock(&adapter->fw_lock); 4571 return rc; 4572 } 4573 4574 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4575 if (rc) { 4576 mutex_unlock(&adapter->fw_lock); 4577 return rc; 4578 } 4579 4580 mutex_unlock(&adapter->fw_lock); 4581 return adapter->fw_done_rc ? -EIO : 0; 4582 } 4583 4584 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4585 struct ibmvnic_adapter *adapter) 4586 { 4587 struct net_device *netdev = adapter->netdev; 4588 int rc; 4589 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4590 4591 rc = crq->query_phys_parms_rsp.rc.code; 4592 if (rc) { 4593 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4594 return rc; 4595 } 4596 switch (rspeed) { 4597 case IBMVNIC_10MBPS: 4598 adapter->speed = SPEED_10; 4599 break; 4600 case IBMVNIC_100MBPS: 4601 adapter->speed = SPEED_100; 4602 break; 4603 case IBMVNIC_1GBPS: 4604 adapter->speed = SPEED_1000; 4605 break; 4606 case IBMVNIC_10GBP: 4607 adapter->speed = SPEED_10000; 4608 break; 4609 case IBMVNIC_25GBPS: 4610 adapter->speed = SPEED_25000; 4611 break; 4612 case IBMVNIC_40GBPS: 4613 adapter->speed = SPEED_40000; 4614 break; 4615 case IBMVNIC_50GBPS: 4616 adapter->speed = SPEED_50000; 4617 break; 4618 case IBMVNIC_100GBPS: 4619 adapter->speed = SPEED_100000; 4620 break; 4621 default: 4622 if (netif_carrier_ok(netdev)) 4623 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4624 adapter->speed = SPEED_UNKNOWN; 4625 } 4626 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4627 adapter->duplex = DUPLEX_FULL; 4628 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4629 adapter->duplex = DUPLEX_HALF; 4630 else 4631 adapter->duplex = DUPLEX_UNKNOWN; 4632 4633 return rc; 4634 } 4635 4636 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4637 struct ibmvnic_adapter *adapter) 4638 { 4639 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4640 struct net_device *netdev = adapter->netdev; 4641 struct device *dev = &adapter->vdev->dev; 4642 u64 *u64_crq = (u64 *)crq; 4643 long rc; 4644 4645 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4646 (unsigned long int)cpu_to_be64(u64_crq[0]), 4647 (unsigned long int)cpu_to_be64(u64_crq[1])); 4648 switch (gen_crq->first) { 4649 case IBMVNIC_CRQ_INIT_RSP: 4650 switch (gen_crq->cmd) { 4651 case IBMVNIC_CRQ_INIT: 4652 dev_info(dev, "Partner initialized\n"); 4653 adapter->from_passive_init = true; 4654 adapter->failover_pending = false; 4655 if (!completion_done(&adapter->init_done)) { 4656 complete(&adapter->init_done); 4657 adapter->init_done_rc = -EIO; 4658 } 4659 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4660 break; 4661 case IBMVNIC_CRQ_INIT_COMPLETE: 4662 dev_info(dev, "Partner initialization complete\n"); 4663 adapter->crq.active = true; 4664 send_version_xchg(adapter); 4665 break; 4666 default: 4667 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4668 } 4669 return; 4670 case IBMVNIC_CRQ_XPORT_EVENT: 4671 netif_carrier_off(netdev); 4672 adapter->crq.active = false; 4673 /* terminate any thread waiting for a response 4674 * from the device 4675 */ 4676 if (!completion_done(&adapter->fw_done)) { 4677 adapter->fw_done_rc = -EIO; 4678 complete(&adapter->fw_done); 4679 } 4680 if (!completion_done(&adapter->stats_done)) 4681 complete(&adapter->stats_done); 4682 if (test_bit(0, &adapter->resetting)) 4683 adapter->force_reset_recovery = true; 4684 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4685 dev_info(dev, "Migrated, re-enabling adapter\n"); 4686 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4687 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4688 dev_info(dev, "Backing device failover detected\n"); 4689 adapter->failover_pending = true; 4690 } else { 4691 /* The adapter lost the connection */ 4692 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4693 gen_crq->cmd); 4694 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4695 } 4696 return; 4697 case IBMVNIC_CRQ_CMD_RSP: 4698 break; 4699 default: 4700 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4701 gen_crq->first); 4702 return; 4703 } 4704 4705 switch (gen_crq->cmd) { 4706 case VERSION_EXCHANGE_RSP: 4707 rc = crq->version_exchange_rsp.rc.code; 4708 if (rc) { 4709 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4710 break; 4711 } 4712 ibmvnic_version = 4713 be16_to_cpu(crq->version_exchange_rsp.version); 4714 dev_info(dev, "Partner protocol version is %d\n", 4715 ibmvnic_version); 4716 send_cap_queries(adapter); 4717 break; 4718 case QUERY_CAPABILITY_RSP: 4719 handle_query_cap_rsp(crq, adapter); 4720 break; 4721 case QUERY_MAP_RSP: 4722 handle_query_map_rsp(crq, adapter); 4723 break; 4724 case REQUEST_MAP_RSP: 4725 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4726 complete(&adapter->fw_done); 4727 break; 4728 case REQUEST_UNMAP_RSP: 4729 handle_request_unmap_rsp(crq, adapter); 4730 break; 4731 case REQUEST_CAPABILITY_RSP: 4732 handle_request_cap_rsp(crq, adapter); 4733 break; 4734 case LOGIN_RSP: 4735 netdev_dbg(netdev, "Got Login Response\n"); 4736 handle_login_rsp(crq, adapter); 4737 break; 4738 case LOGICAL_LINK_STATE_RSP: 4739 netdev_dbg(netdev, 4740 "Got Logical Link State Response, state: %d rc: %d\n", 4741 crq->logical_link_state_rsp.link_state, 4742 crq->logical_link_state_rsp.rc.code); 4743 adapter->logical_link_state = 4744 crq->logical_link_state_rsp.link_state; 4745 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4746 complete(&adapter->init_done); 4747 break; 4748 case LINK_STATE_INDICATION: 4749 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4750 adapter->phys_link_state = 4751 crq->link_state_indication.phys_link_state; 4752 adapter->logical_link_state = 4753 crq->link_state_indication.logical_link_state; 4754 if (adapter->phys_link_state && adapter->logical_link_state) 4755 netif_carrier_on(netdev); 4756 else 4757 netif_carrier_off(netdev); 4758 break; 4759 case CHANGE_MAC_ADDR_RSP: 4760 netdev_dbg(netdev, "Got MAC address change Response\n"); 4761 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4762 break; 4763 case ERROR_INDICATION: 4764 netdev_dbg(netdev, "Got Error Indication\n"); 4765 handle_error_indication(crq, adapter); 4766 break; 4767 case REQUEST_STATISTICS_RSP: 4768 netdev_dbg(netdev, "Got Statistics Response\n"); 4769 complete(&adapter->stats_done); 4770 break; 4771 case QUERY_IP_OFFLOAD_RSP: 4772 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4773 handle_query_ip_offload_rsp(adapter); 4774 break; 4775 case MULTICAST_CTRL_RSP: 4776 netdev_dbg(netdev, "Got multicast control Response\n"); 4777 break; 4778 case CONTROL_IP_OFFLOAD_RSP: 4779 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4780 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4781 sizeof(adapter->ip_offload_ctrl), 4782 DMA_TO_DEVICE); 4783 complete(&adapter->init_done); 4784 break; 4785 case COLLECT_FW_TRACE_RSP: 4786 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4787 complete(&adapter->fw_done); 4788 break; 4789 case GET_VPD_SIZE_RSP: 4790 handle_vpd_size_rsp(crq, adapter); 4791 break; 4792 case GET_VPD_RSP: 4793 handle_vpd_rsp(crq, adapter); 4794 break; 4795 case QUERY_PHYS_PARMS_RSP: 4796 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4797 complete(&adapter->fw_done); 4798 break; 4799 default: 4800 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4801 gen_crq->cmd); 4802 } 4803 } 4804 4805 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4806 { 4807 struct ibmvnic_adapter *adapter = instance; 4808 4809 tasklet_schedule(&adapter->tasklet); 4810 return IRQ_HANDLED; 4811 } 4812 4813 static void ibmvnic_tasklet(void *data) 4814 { 4815 struct ibmvnic_adapter *adapter = data; 4816 struct ibmvnic_crq_queue *queue = &adapter->crq; 4817 union ibmvnic_crq *crq; 4818 unsigned long flags; 4819 bool done = false; 4820 4821 spin_lock_irqsave(&queue->lock, flags); 4822 while (!done) { 4823 /* Pull all the valid messages off the CRQ */ 4824 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4825 ibmvnic_handle_crq(crq, adapter); 4826 crq->generic.first = 0; 4827 } 4828 4829 /* remain in tasklet until all 4830 * capabilities responses are received 4831 */ 4832 if (!adapter->wait_capability) 4833 done = true; 4834 } 4835 /* if capabilities CRQ's were sent in this tasklet, the following 4836 * tasklet must wait until all responses are received 4837 */ 4838 if (atomic_read(&adapter->running_cap_crqs) != 0) 4839 adapter->wait_capability = true; 4840 spin_unlock_irqrestore(&queue->lock, flags); 4841 } 4842 4843 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4844 { 4845 struct vio_dev *vdev = adapter->vdev; 4846 int rc; 4847 4848 do { 4849 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4850 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4851 4852 if (rc) 4853 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4854 4855 return rc; 4856 } 4857 4858 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4859 { 4860 struct ibmvnic_crq_queue *crq = &adapter->crq; 4861 struct device *dev = &adapter->vdev->dev; 4862 struct vio_dev *vdev = adapter->vdev; 4863 int rc; 4864 4865 /* Close the CRQ */ 4866 do { 4867 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4868 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4869 4870 /* Clean out the queue */ 4871 memset(crq->msgs, 0, PAGE_SIZE); 4872 crq->cur = 0; 4873 crq->active = false; 4874 4875 /* And re-open it again */ 4876 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4877 crq->msg_token, PAGE_SIZE); 4878 4879 if (rc == H_CLOSED) 4880 /* Adapter is good, but other end is not ready */ 4881 dev_warn(dev, "Partner adapter not ready\n"); 4882 else if (rc != 0) 4883 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4884 4885 return rc; 4886 } 4887 4888 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4889 { 4890 struct ibmvnic_crq_queue *crq = &adapter->crq; 4891 struct vio_dev *vdev = adapter->vdev; 4892 long rc; 4893 4894 if (!crq->msgs) 4895 return; 4896 4897 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4898 free_irq(vdev->irq, adapter); 4899 tasklet_kill(&adapter->tasklet); 4900 do { 4901 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4902 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4903 4904 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4905 DMA_BIDIRECTIONAL); 4906 free_page((unsigned long)crq->msgs); 4907 crq->msgs = NULL; 4908 crq->active = false; 4909 } 4910 4911 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4912 { 4913 struct ibmvnic_crq_queue *crq = &adapter->crq; 4914 struct device *dev = &adapter->vdev->dev; 4915 struct vio_dev *vdev = adapter->vdev; 4916 int rc, retrc = -ENOMEM; 4917 4918 if (crq->msgs) 4919 return 0; 4920 4921 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4922 /* Should we allocate more than one page? */ 4923 4924 if (!crq->msgs) 4925 return -ENOMEM; 4926 4927 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4928 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4929 DMA_BIDIRECTIONAL); 4930 if (dma_mapping_error(dev, crq->msg_token)) 4931 goto map_failed; 4932 4933 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4934 crq->msg_token, PAGE_SIZE); 4935 4936 if (rc == H_RESOURCE) 4937 /* maybe kexecing and resource is busy. try a reset */ 4938 rc = ibmvnic_reset_crq(adapter); 4939 retrc = rc; 4940 4941 if (rc == H_CLOSED) { 4942 dev_warn(dev, "Partner adapter not ready\n"); 4943 } else if (rc) { 4944 dev_warn(dev, "Error %d opening adapter\n", rc); 4945 goto reg_crq_failed; 4946 } 4947 4948 retrc = 0; 4949 4950 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4951 (unsigned long)adapter); 4952 4953 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4954 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 4955 adapter->vdev->unit_address); 4956 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 4957 if (rc) { 4958 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4959 vdev->irq, rc); 4960 goto req_irq_failed; 4961 } 4962 4963 rc = vio_enable_interrupts(vdev); 4964 if (rc) { 4965 dev_err(dev, "Error %d enabling interrupts\n", rc); 4966 goto req_irq_failed; 4967 } 4968 4969 crq->cur = 0; 4970 spin_lock_init(&crq->lock); 4971 4972 return retrc; 4973 4974 req_irq_failed: 4975 tasklet_kill(&adapter->tasklet); 4976 do { 4977 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4978 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4979 reg_crq_failed: 4980 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4981 map_failed: 4982 free_page((unsigned long)crq->msgs); 4983 crq->msgs = NULL; 4984 return retrc; 4985 } 4986 4987 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4988 { 4989 struct device *dev = &adapter->vdev->dev; 4990 unsigned long timeout = msecs_to_jiffies(30000); 4991 u64 old_num_rx_queues, old_num_tx_queues; 4992 int rc; 4993 4994 adapter->from_passive_init = false; 4995 4996 old_num_rx_queues = adapter->req_rx_queues; 4997 old_num_tx_queues = adapter->req_tx_queues; 4998 4999 reinit_completion(&adapter->init_done); 5000 adapter->init_done_rc = 0; 5001 ibmvnic_send_crq_init(adapter); 5002 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5003 dev_err(dev, "Initialization sequence timed out\n"); 5004 return -1; 5005 } 5006 5007 if (adapter->init_done_rc) { 5008 release_crq_queue(adapter); 5009 return adapter->init_done_rc; 5010 } 5011 5012 if (adapter->from_passive_init) { 5013 adapter->state = VNIC_OPEN; 5014 adapter->from_passive_init = false; 5015 return -1; 5016 } 5017 5018 if (test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5019 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5020 if (adapter->req_rx_queues != old_num_rx_queues || 5021 adapter->req_tx_queues != old_num_tx_queues) { 5022 release_sub_crqs(adapter, 0); 5023 rc = init_sub_crqs(adapter); 5024 } else { 5025 rc = reset_sub_crq_queues(adapter); 5026 } 5027 } else { 5028 rc = init_sub_crqs(adapter); 5029 } 5030 5031 if (rc) { 5032 dev_err(dev, "Initialization of sub crqs failed\n"); 5033 release_crq_queue(adapter); 5034 return rc; 5035 } 5036 5037 rc = init_sub_crq_irqs(adapter); 5038 if (rc) { 5039 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5040 release_crq_queue(adapter); 5041 } 5042 5043 return rc; 5044 } 5045 5046 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 5047 { 5048 struct device *dev = &adapter->vdev->dev; 5049 unsigned long timeout = msecs_to_jiffies(30000); 5050 int rc; 5051 5052 adapter->from_passive_init = false; 5053 5054 adapter->init_done_rc = 0; 5055 ibmvnic_send_crq_init(adapter); 5056 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5057 dev_err(dev, "Initialization sequence timed out\n"); 5058 return -1; 5059 } 5060 5061 if (adapter->init_done_rc) { 5062 release_crq_queue(adapter); 5063 return adapter->init_done_rc; 5064 } 5065 5066 if (adapter->from_passive_init) { 5067 adapter->state = VNIC_OPEN; 5068 adapter->from_passive_init = false; 5069 return -1; 5070 } 5071 5072 rc = init_sub_crqs(adapter); 5073 if (rc) { 5074 dev_err(dev, "Initialization of sub crqs failed\n"); 5075 release_crq_queue(adapter); 5076 return rc; 5077 } 5078 5079 rc = init_sub_crq_irqs(adapter); 5080 if (rc) { 5081 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5082 release_crq_queue(adapter); 5083 } 5084 5085 return rc; 5086 } 5087 5088 static struct device_attribute dev_attr_failover; 5089 5090 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5091 { 5092 struct ibmvnic_adapter *adapter; 5093 struct net_device *netdev; 5094 unsigned char *mac_addr_p; 5095 int rc; 5096 5097 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5098 dev->unit_address); 5099 5100 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5101 VETH_MAC_ADDR, NULL); 5102 if (!mac_addr_p) { 5103 dev_err(&dev->dev, 5104 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5105 __FILE__, __LINE__); 5106 return 0; 5107 } 5108 5109 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5110 IBMVNIC_MAX_QUEUES); 5111 if (!netdev) 5112 return -ENOMEM; 5113 5114 adapter = netdev_priv(netdev); 5115 adapter->state = VNIC_PROBING; 5116 dev_set_drvdata(&dev->dev, netdev); 5117 adapter->vdev = dev; 5118 adapter->netdev = netdev; 5119 5120 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5121 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5122 netdev->irq = dev->irq; 5123 netdev->netdev_ops = &ibmvnic_netdev_ops; 5124 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5125 SET_NETDEV_DEV(netdev, &dev->dev); 5126 5127 spin_lock_init(&adapter->stats_lock); 5128 5129 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5130 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5131 __ibmvnic_delayed_reset); 5132 INIT_LIST_HEAD(&adapter->rwi_list); 5133 spin_lock_init(&adapter->rwi_lock); 5134 spin_lock_init(&adapter->state_lock); 5135 mutex_init(&adapter->fw_lock); 5136 init_completion(&adapter->init_done); 5137 init_completion(&adapter->fw_done); 5138 init_completion(&adapter->reset_done); 5139 init_completion(&adapter->stats_done); 5140 clear_bit(0, &adapter->resetting); 5141 5142 do { 5143 rc = init_crq_queue(adapter); 5144 if (rc) { 5145 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5146 rc); 5147 goto ibmvnic_init_fail; 5148 } 5149 5150 rc = ibmvnic_init(adapter); 5151 if (rc && rc != EAGAIN) 5152 goto ibmvnic_init_fail; 5153 } while (rc == EAGAIN); 5154 5155 rc = init_stats_buffers(adapter); 5156 if (rc) 5157 goto ibmvnic_init_fail; 5158 5159 rc = init_stats_token(adapter); 5160 if (rc) 5161 goto ibmvnic_stats_fail; 5162 5163 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5164 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5165 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5166 5167 rc = device_create_file(&dev->dev, &dev_attr_failover); 5168 if (rc) 5169 goto ibmvnic_dev_file_err; 5170 5171 netif_carrier_off(netdev); 5172 rc = register_netdev(netdev); 5173 if (rc) { 5174 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5175 goto ibmvnic_register_fail; 5176 } 5177 dev_info(&dev->dev, "ibmvnic registered\n"); 5178 5179 adapter->state = VNIC_PROBED; 5180 5181 adapter->wait_for_reset = false; 5182 5183 return 0; 5184 5185 ibmvnic_register_fail: 5186 device_remove_file(&dev->dev, &dev_attr_failover); 5187 5188 ibmvnic_dev_file_err: 5189 release_stats_token(adapter); 5190 5191 ibmvnic_stats_fail: 5192 release_stats_buffers(adapter); 5193 5194 ibmvnic_init_fail: 5195 release_sub_crqs(adapter, 1); 5196 release_crq_queue(adapter); 5197 mutex_destroy(&adapter->fw_lock); 5198 free_netdev(netdev); 5199 5200 return rc; 5201 } 5202 5203 static int ibmvnic_remove(struct vio_dev *dev) 5204 { 5205 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5206 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5207 unsigned long flags; 5208 5209 spin_lock_irqsave(&adapter->state_lock, flags); 5210 if (adapter->state == VNIC_RESETTING) { 5211 spin_unlock_irqrestore(&adapter->state_lock, flags); 5212 return -EBUSY; 5213 } 5214 5215 adapter->state = VNIC_REMOVING; 5216 spin_unlock_irqrestore(&adapter->state_lock, flags); 5217 5218 flush_work(&adapter->ibmvnic_reset); 5219 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5220 5221 rtnl_lock(); 5222 unregister_netdevice(netdev); 5223 5224 release_resources(adapter); 5225 release_sub_crqs(adapter, 1); 5226 release_crq_queue(adapter); 5227 5228 release_stats_token(adapter); 5229 release_stats_buffers(adapter); 5230 5231 adapter->state = VNIC_REMOVED; 5232 5233 rtnl_unlock(); 5234 mutex_destroy(&adapter->fw_lock); 5235 device_remove_file(&dev->dev, &dev_attr_failover); 5236 free_netdev(netdev); 5237 dev_set_drvdata(&dev->dev, NULL); 5238 5239 return 0; 5240 } 5241 5242 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5243 const char *buf, size_t count) 5244 { 5245 struct net_device *netdev = dev_get_drvdata(dev); 5246 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5247 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5248 __be64 session_token; 5249 long rc; 5250 5251 if (!sysfs_streq(buf, "1")) 5252 return -EINVAL; 5253 5254 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5255 H_GET_SESSION_TOKEN, 0, 0, 0); 5256 if (rc) { 5257 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5258 rc); 5259 return -EINVAL; 5260 } 5261 5262 session_token = (__be64)retbuf[0]; 5263 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5264 be64_to_cpu(session_token)); 5265 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5266 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5267 if (rc) { 5268 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5269 rc); 5270 return -EINVAL; 5271 } 5272 5273 return count; 5274 } 5275 5276 static DEVICE_ATTR_WO(failover); 5277 5278 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5279 { 5280 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5281 struct ibmvnic_adapter *adapter; 5282 struct iommu_table *tbl; 5283 unsigned long ret = 0; 5284 int i; 5285 5286 tbl = get_iommu_table_base(&vdev->dev); 5287 5288 /* netdev inits at probe time along with the structures we need below*/ 5289 if (!netdev) 5290 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5291 5292 adapter = netdev_priv(netdev); 5293 5294 ret += PAGE_SIZE; /* the crq message queue */ 5295 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5296 5297 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5298 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5299 5300 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5301 i++) 5302 ret += adapter->rx_pool[i].size * 5303 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5304 5305 return ret; 5306 } 5307 5308 static int ibmvnic_resume(struct device *dev) 5309 { 5310 struct net_device *netdev = dev_get_drvdata(dev); 5311 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5312 5313 if (adapter->state != VNIC_OPEN) 5314 return 0; 5315 5316 tasklet_schedule(&adapter->tasklet); 5317 5318 return 0; 5319 } 5320 5321 static const struct vio_device_id ibmvnic_device_table[] = { 5322 {"network", "IBM,vnic"}, 5323 {"", "" } 5324 }; 5325 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5326 5327 static const struct dev_pm_ops ibmvnic_pm_ops = { 5328 .resume = ibmvnic_resume 5329 }; 5330 5331 static struct vio_driver ibmvnic_driver = { 5332 .id_table = ibmvnic_device_table, 5333 .probe = ibmvnic_probe, 5334 .remove = ibmvnic_remove, 5335 .get_desired_dma = ibmvnic_get_desired_dma, 5336 .name = ibmvnic_driver_name, 5337 .pm = &ibmvnic_pm_ops, 5338 }; 5339 5340 /* module functions */ 5341 static int __init ibmvnic_module_init(void) 5342 { 5343 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5344 IBMVNIC_DRIVER_VERSION); 5345 5346 return vio_register_driver(&ibmvnic_driver); 5347 } 5348 5349 static void __exit ibmvnic_module_exit(void) 5350 { 5351 vio_unregister_driver(&ibmvnic_driver); 5352 } 5353 5354 module_init(ibmvnic_module_init); 5355 module_exit(ibmvnic_module_exit); 5356