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