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