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 { 2193 rc = do_reset(adapter, rwi, reset_state); 2194 } 2195 kfree(rwi); 2196 if (rc == IBMVNIC_OPEN_FAILED) { 2197 if (list_empty(&adapter->rwi_list)) 2198 adapter->state = VNIC_CLOSED; 2199 else 2200 adapter->state = reset_state; 2201 rc = 0; 2202 } else if (rc && rc != IBMVNIC_INIT_FAILED && 2203 !adapter->force_reset_recovery) 2204 break; 2205 2206 rwi = get_next_rwi(adapter); 2207 2208 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2209 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2210 adapter->force_reset_recovery = true; 2211 } 2212 2213 if (adapter->wait_for_reset) { 2214 adapter->reset_done_rc = rc; 2215 complete(&adapter->reset_done); 2216 } 2217 2218 if (rc) { 2219 netdev_dbg(adapter->netdev, "Reset failed\n"); 2220 free_all_rwi(adapter); 2221 } 2222 2223 clear_bit_unlock(0, &adapter->resetting); 2224 } 2225 2226 static void __ibmvnic_delayed_reset(struct work_struct *work) 2227 { 2228 struct ibmvnic_adapter *adapter; 2229 2230 adapter = container_of(work, struct ibmvnic_adapter, 2231 ibmvnic_delayed_reset.work); 2232 __ibmvnic_reset(&adapter->ibmvnic_reset); 2233 } 2234 2235 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2236 enum ibmvnic_reset_reason reason) 2237 { 2238 struct list_head *entry, *tmp_entry; 2239 struct ibmvnic_rwi *rwi, *tmp; 2240 struct net_device *netdev = adapter->netdev; 2241 unsigned long flags; 2242 int ret; 2243 2244 if (adapter->state == VNIC_REMOVING || 2245 adapter->state == VNIC_REMOVED || 2246 adapter->failover_pending) { 2247 ret = EBUSY; 2248 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2249 goto err; 2250 } 2251 2252 if (adapter->state == VNIC_PROBING) { 2253 netdev_warn(netdev, "Adapter reset during probe\n"); 2254 ret = adapter->init_done_rc = EAGAIN; 2255 goto err; 2256 } 2257 2258 spin_lock_irqsave(&adapter->rwi_lock, flags); 2259 2260 list_for_each(entry, &adapter->rwi_list) { 2261 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2262 if (tmp->reset_reason == reason) { 2263 netdev_dbg(netdev, "Skipping matching reset\n"); 2264 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2265 ret = EBUSY; 2266 goto err; 2267 } 2268 } 2269 2270 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2271 if (!rwi) { 2272 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2273 ibmvnic_close(netdev); 2274 ret = ENOMEM; 2275 goto err; 2276 } 2277 /* if we just received a transport event, 2278 * flush reset queue and process this reset 2279 */ 2280 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2281 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2282 list_del(entry); 2283 } 2284 rwi->reset_reason = reason; 2285 list_add_tail(&rwi->list, &adapter->rwi_list); 2286 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2287 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2288 schedule_work(&adapter->ibmvnic_reset); 2289 2290 return 0; 2291 err: 2292 return -ret; 2293 } 2294 2295 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2296 { 2297 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2298 2299 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2300 } 2301 2302 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2303 struct ibmvnic_rx_buff *rx_buff) 2304 { 2305 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2306 2307 rx_buff->skb = NULL; 2308 2309 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2310 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2311 2312 atomic_dec(&pool->available); 2313 } 2314 2315 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2316 { 2317 struct net_device *netdev = napi->dev; 2318 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2319 int scrq_num = (int)(napi - adapter->napi); 2320 int frames_processed = 0; 2321 2322 restart_poll: 2323 while (frames_processed < budget) { 2324 struct sk_buff *skb; 2325 struct ibmvnic_rx_buff *rx_buff; 2326 union sub_crq *next; 2327 u32 length; 2328 u16 offset; 2329 u8 flags = 0; 2330 2331 if (unlikely(test_bit(0, &adapter->resetting) && 2332 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2333 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2334 napi_complete_done(napi, frames_processed); 2335 return frames_processed; 2336 } 2337 2338 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2339 break; 2340 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2341 rx_buff = 2342 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2343 rx_comp.correlator); 2344 /* do error checking */ 2345 if (next->rx_comp.rc) { 2346 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2347 be16_to_cpu(next->rx_comp.rc)); 2348 /* free the entry */ 2349 next->rx_comp.first = 0; 2350 dev_kfree_skb_any(rx_buff->skb); 2351 remove_buff_from_pool(adapter, rx_buff); 2352 continue; 2353 } else if (!rx_buff->skb) { 2354 /* free the entry */ 2355 next->rx_comp.first = 0; 2356 remove_buff_from_pool(adapter, rx_buff); 2357 continue; 2358 } 2359 2360 length = be32_to_cpu(next->rx_comp.len); 2361 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2362 flags = next->rx_comp.flags; 2363 skb = rx_buff->skb; 2364 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2365 length); 2366 2367 /* VLAN Header has been stripped by the system firmware and 2368 * needs to be inserted by the driver 2369 */ 2370 if (adapter->rx_vlan_header_insertion && 2371 (flags & IBMVNIC_VLAN_STRIPPED)) 2372 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2373 ntohs(next->rx_comp.vlan_tci)); 2374 2375 /* free the entry */ 2376 next->rx_comp.first = 0; 2377 remove_buff_from_pool(adapter, rx_buff); 2378 2379 skb_put(skb, length); 2380 skb->protocol = eth_type_trans(skb, netdev); 2381 skb_record_rx_queue(skb, scrq_num); 2382 2383 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2384 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2385 skb->ip_summed = CHECKSUM_UNNECESSARY; 2386 } 2387 2388 length = skb->len; 2389 napi_gro_receive(napi, skb); /* send it up */ 2390 netdev->stats.rx_packets++; 2391 netdev->stats.rx_bytes += length; 2392 adapter->rx_stats_buffers[scrq_num].packets++; 2393 adapter->rx_stats_buffers[scrq_num].bytes += length; 2394 frames_processed++; 2395 } 2396 2397 if (adapter->state != VNIC_CLOSING) 2398 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2399 2400 if (frames_processed < budget) { 2401 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2402 napi_complete_done(napi, frames_processed); 2403 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2404 napi_reschedule(napi)) { 2405 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2406 goto restart_poll; 2407 } 2408 } 2409 return frames_processed; 2410 } 2411 2412 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2413 { 2414 int rc, ret; 2415 2416 adapter->fallback.mtu = adapter->req_mtu; 2417 adapter->fallback.rx_queues = adapter->req_rx_queues; 2418 adapter->fallback.tx_queues = adapter->req_tx_queues; 2419 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2420 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2421 2422 reinit_completion(&adapter->reset_done); 2423 adapter->wait_for_reset = true; 2424 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2425 2426 if (rc) { 2427 ret = rc; 2428 goto out; 2429 } 2430 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2431 if (rc) { 2432 ret = -ENODEV; 2433 goto out; 2434 } 2435 2436 ret = 0; 2437 if (adapter->reset_done_rc) { 2438 ret = -EIO; 2439 adapter->desired.mtu = adapter->fallback.mtu; 2440 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2441 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2442 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2443 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2444 2445 reinit_completion(&adapter->reset_done); 2446 adapter->wait_for_reset = true; 2447 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2448 if (rc) { 2449 ret = rc; 2450 goto out; 2451 } 2452 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2453 60000); 2454 if (rc) { 2455 ret = -ENODEV; 2456 goto out; 2457 } 2458 } 2459 out: 2460 adapter->wait_for_reset = false; 2461 2462 return ret; 2463 } 2464 2465 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2466 { 2467 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2468 2469 adapter->desired.mtu = new_mtu + ETH_HLEN; 2470 2471 return wait_for_reset(adapter); 2472 } 2473 2474 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2475 struct net_device *dev, 2476 netdev_features_t features) 2477 { 2478 /* Some backing hardware adapters can not 2479 * handle packets with a MSS less than 224 2480 * or with only one segment. 2481 */ 2482 if (skb_is_gso(skb)) { 2483 if (skb_shinfo(skb)->gso_size < 224 || 2484 skb_shinfo(skb)->gso_segs == 1) 2485 features &= ~NETIF_F_GSO_MASK; 2486 } 2487 2488 return features; 2489 } 2490 2491 static const struct net_device_ops ibmvnic_netdev_ops = { 2492 .ndo_open = ibmvnic_open, 2493 .ndo_stop = ibmvnic_close, 2494 .ndo_start_xmit = ibmvnic_xmit, 2495 .ndo_set_rx_mode = ibmvnic_set_multi, 2496 .ndo_set_mac_address = ibmvnic_set_mac, 2497 .ndo_validate_addr = eth_validate_addr, 2498 .ndo_tx_timeout = ibmvnic_tx_timeout, 2499 .ndo_change_mtu = ibmvnic_change_mtu, 2500 .ndo_features_check = ibmvnic_features_check, 2501 }; 2502 2503 /* ethtool functions */ 2504 2505 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2506 struct ethtool_link_ksettings *cmd) 2507 { 2508 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2509 int rc; 2510 2511 rc = send_query_phys_parms(adapter); 2512 if (rc) { 2513 adapter->speed = SPEED_UNKNOWN; 2514 adapter->duplex = DUPLEX_UNKNOWN; 2515 } 2516 cmd->base.speed = adapter->speed; 2517 cmd->base.duplex = adapter->duplex; 2518 cmd->base.port = PORT_FIBRE; 2519 cmd->base.phy_address = 0; 2520 cmd->base.autoneg = AUTONEG_ENABLE; 2521 2522 return 0; 2523 } 2524 2525 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2526 struct ethtool_drvinfo *info) 2527 { 2528 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2529 2530 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2531 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2532 strlcpy(info->fw_version, adapter->fw_version, 2533 sizeof(info->fw_version)); 2534 } 2535 2536 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2537 { 2538 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2539 2540 return adapter->msg_enable; 2541 } 2542 2543 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2544 { 2545 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2546 2547 adapter->msg_enable = data; 2548 } 2549 2550 static u32 ibmvnic_get_link(struct net_device *netdev) 2551 { 2552 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2553 2554 /* Don't need to send a query because we request a logical link up at 2555 * init and then we wait for link state indications 2556 */ 2557 return adapter->logical_link_state; 2558 } 2559 2560 static void ibmvnic_get_ringparam(struct net_device *netdev, 2561 struct ethtool_ringparam *ring) 2562 { 2563 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2564 2565 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2566 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2567 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2568 } else { 2569 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2570 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2571 } 2572 ring->rx_mini_max_pending = 0; 2573 ring->rx_jumbo_max_pending = 0; 2574 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2575 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2576 ring->rx_mini_pending = 0; 2577 ring->rx_jumbo_pending = 0; 2578 } 2579 2580 static int ibmvnic_set_ringparam(struct net_device *netdev, 2581 struct ethtool_ringparam *ring) 2582 { 2583 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2584 int ret; 2585 2586 ret = 0; 2587 adapter->desired.rx_entries = ring->rx_pending; 2588 adapter->desired.tx_entries = ring->tx_pending; 2589 2590 ret = wait_for_reset(adapter); 2591 2592 if (!ret && 2593 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2594 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2595 netdev_info(netdev, 2596 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2597 ring->rx_pending, ring->tx_pending, 2598 adapter->req_rx_add_entries_per_subcrq, 2599 adapter->req_tx_entries_per_subcrq); 2600 return ret; 2601 } 2602 2603 static void ibmvnic_get_channels(struct net_device *netdev, 2604 struct ethtool_channels *channels) 2605 { 2606 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2607 2608 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2609 channels->max_rx = adapter->max_rx_queues; 2610 channels->max_tx = adapter->max_tx_queues; 2611 } else { 2612 channels->max_rx = IBMVNIC_MAX_QUEUES; 2613 channels->max_tx = IBMVNIC_MAX_QUEUES; 2614 } 2615 2616 channels->max_other = 0; 2617 channels->max_combined = 0; 2618 channels->rx_count = adapter->req_rx_queues; 2619 channels->tx_count = adapter->req_tx_queues; 2620 channels->other_count = 0; 2621 channels->combined_count = 0; 2622 } 2623 2624 static int ibmvnic_set_channels(struct net_device *netdev, 2625 struct ethtool_channels *channels) 2626 { 2627 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2628 int ret; 2629 2630 ret = 0; 2631 adapter->desired.rx_queues = channels->rx_count; 2632 adapter->desired.tx_queues = channels->tx_count; 2633 2634 ret = wait_for_reset(adapter); 2635 2636 if (!ret && 2637 (adapter->req_rx_queues != channels->rx_count || 2638 adapter->req_tx_queues != channels->tx_count)) 2639 netdev_info(netdev, 2640 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2641 channels->rx_count, channels->tx_count, 2642 adapter->req_rx_queues, adapter->req_tx_queues); 2643 return ret; 2644 2645 } 2646 2647 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2648 { 2649 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2650 int i; 2651 2652 switch (stringset) { 2653 case ETH_SS_STATS: 2654 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2655 i++, data += ETH_GSTRING_LEN) 2656 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2657 2658 for (i = 0; i < adapter->req_tx_queues; i++) { 2659 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2660 data += ETH_GSTRING_LEN; 2661 2662 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2663 data += ETH_GSTRING_LEN; 2664 2665 snprintf(data, ETH_GSTRING_LEN, 2666 "tx%d_dropped_packets", i); 2667 data += ETH_GSTRING_LEN; 2668 } 2669 2670 for (i = 0; i < adapter->req_rx_queues; i++) { 2671 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2672 data += ETH_GSTRING_LEN; 2673 2674 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2675 data += ETH_GSTRING_LEN; 2676 2677 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2678 data += ETH_GSTRING_LEN; 2679 } 2680 break; 2681 2682 case ETH_SS_PRIV_FLAGS: 2683 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2684 strcpy(data + i * ETH_GSTRING_LEN, 2685 ibmvnic_priv_flags[i]); 2686 break; 2687 default: 2688 return; 2689 } 2690 } 2691 2692 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2693 { 2694 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2695 2696 switch (sset) { 2697 case ETH_SS_STATS: 2698 return ARRAY_SIZE(ibmvnic_stats) + 2699 adapter->req_tx_queues * NUM_TX_STATS + 2700 adapter->req_rx_queues * NUM_RX_STATS; 2701 case ETH_SS_PRIV_FLAGS: 2702 return ARRAY_SIZE(ibmvnic_priv_flags); 2703 default: 2704 return -EOPNOTSUPP; 2705 } 2706 } 2707 2708 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2709 struct ethtool_stats *stats, u64 *data) 2710 { 2711 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2712 union ibmvnic_crq crq; 2713 int i, j; 2714 int rc; 2715 2716 memset(&crq, 0, sizeof(crq)); 2717 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2718 crq.request_statistics.cmd = REQUEST_STATISTICS; 2719 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2720 crq.request_statistics.len = 2721 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2722 2723 /* Wait for data to be written */ 2724 reinit_completion(&adapter->stats_done); 2725 rc = ibmvnic_send_crq(adapter, &crq); 2726 if (rc) 2727 return; 2728 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2729 if (rc) 2730 return; 2731 2732 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2733 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2734 ibmvnic_stats[i].offset)); 2735 2736 for (j = 0; j < adapter->req_tx_queues; j++) { 2737 data[i] = adapter->tx_stats_buffers[j].packets; 2738 i++; 2739 data[i] = adapter->tx_stats_buffers[j].bytes; 2740 i++; 2741 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2742 i++; 2743 } 2744 2745 for (j = 0; j < adapter->req_rx_queues; j++) { 2746 data[i] = adapter->rx_stats_buffers[j].packets; 2747 i++; 2748 data[i] = adapter->rx_stats_buffers[j].bytes; 2749 i++; 2750 data[i] = adapter->rx_stats_buffers[j].interrupts; 2751 i++; 2752 } 2753 } 2754 2755 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2756 { 2757 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2758 2759 return adapter->priv_flags; 2760 } 2761 2762 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2763 { 2764 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2765 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2766 2767 if (which_maxes) 2768 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2769 else 2770 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2771 2772 return 0; 2773 } 2774 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2775 .get_drvinfo = ibmvnic_get_drvinfo, 2776 .get_msglevel = ibmvnic_get_msglevel, 2777 .set_msglevel = ibmvnic_set_msglevel, 2778 .get_link = ibmvnic_get_link, 2779 .get_ringparam = ibmvnic_get_ringparam, 2780 .set_ringparam = ibmvnic_set_ringparam, 2781 .get_channels = ibmvnic_get_channels, 2782 .set_channels = ibmvnic_set_channels, 2783 .get_strings = ibmvnic_get_strings, 2784 .get_sset_count = ibmvnic_get_sset_count, 2785 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2786 .get_link_ksettings = ibmvnic_get_link_ksettings, 2787 .get_priv_flags = ibmvnic_get_priv_flags, 2788 .set_priv_flags = ibmvnic_set_priv_flags, 2789 }; 2790 2791 /* Routines for managing CRQs/sCRQs */ 2792 2793 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2794 struct ibmvnic_sub_crq_queue *scrq) 2795 { 2796 int rc; 2797 2798 if (scrq->irq) { 2799 free_irq(scrq->irq, scrq); 2800 irq_dispose_mapping(scrq->irq); 2801 scrq->irq = 0; 2802 } 2803 2804 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2805 atomic_set(&scrq->used, 0); 2806 scrq->cur = 0; 2807 2808 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2809 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2810 return rc; 2811 } 2812 2813 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2814 { 2815 int i, rc; 2816 2817 for (i = 0; i < adapter->req_tx_queues; i++) { 2818 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2819 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2820 if (rc) 2821 return rc; 2822 } 2823 2824 for (i = 0; i < adapter->req_rx_queues; i++) { 2825 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2826 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2827 if (rc) 2828 return rc; 2829 } 2830 2831 return rc; 2832 } 2833 2834 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2835 struct ibmvnic_sub_crq_queue *scrq, 2836 bool do_h_free) 2837 { 2838 struct device *dev = &adapter->vdev->dev; 2839 long rc; 2840 2841 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2842 2843 if (do_h_free) { 2844 /* Close the sub-crqs */ 2845 do { 2846 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2847 adapter->vdev->unit_address, 2848 scrq->crq_num); 2849 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2850 2851 if (rc) { 2852 netdev_err(adapter->netdev, 2853 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2854 scrq->crq_num, rc); 2855 } 2856 } 2857 2858 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2859 DMA_BIDIRECTIONAL); 2860 free_pages((unsigned long)scrq->msgs, 2); 2861 kfree(scrq); 2862 } 2863 2864 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2865 *adapter) 2866 { 2867 struct device *dev = &adapter->vdev->dev; 2868 struct ibmvnic_sub_crq_queue *scrq; 2869 int rc; 2870 2871 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2872 if (!scrq) 2873 return NULL; 2874 2875 scrq->msgs = 2876 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2877 if (!scrq->msgs) { 2878 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2879 goto zero_page_failed; 2880 } 2881 2882 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2883 DMA_BIDIRECTIONAL); 2884 if (dma_mapping_error(dev, scrq->msg_token)) { 2885 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2886 goto map_failed; 2887 } 2888 2889 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2890 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2891 2892 if (rc == H_RESOURCE) 2893 rc = ibmvnic_reset_crq(adapter); 2894 2895 if (rc == H_CLOSED) { 2896 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2897 } else if (rc) { 2898 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2899 goto reg_failed; 2900 } 2901 2902 scrq->adapter = adapter; 2903 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2904 spin_lock_init(&scrq->lock); 2905 2906 netdev_dbg(adapter->netdev, 2907 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2908 scrq->crq_num, scrq->hw_irq, scrq->irq); 2909 2910 return scrq; 2911 2912 reg_failed: 2913 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2914 DMA_BIDIRECTIONAL); 2915 map_failed: 2916 free_pages((unsigned long)scrq->msgs, 2); 2917 zero_page_failed: 2918 kfree(scrq); 2919 2920 return NULL; 2921 } 2922 2923 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2924 { 2925 int i; 2926 2927 if (adapter->tx_scrq) { 2928 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2929 if (!adapter->tx_scrq[i]) 2930 continue; 2931 2932 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2933 i); 2934 if (adapter->tx_scrq[i]->irq) { 2935 free_irq(adapter->tx_scrq[i]->irq, 2936 adapter->tx_scrq[i]); 2937 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2938 adapter->tx_scrq[i]->irq = 0; 2939 } 2940 2941 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2942 do_h_free); 2943 } 2944 2945 kfree(adapter->tx_scrq); 2946 adapter->tx_scrq = NULL; 2947 adapter->num_active_tx_scrqs = 0; 2948 } 2949 2950 if (adapter->rx_scrq) { 2951 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2952 if (!adapter->rx_scrq[i]) 2953 continue; 2954 2955 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2956 i); 2957 if (adapter->rx_scrq[i]->irq) { 2958 free_irq(adapter->rx_scrq[i]->irq, 2959 adapter->rx_scrq[i]); 2960 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2961 adapter->rx_scrq[i]->irq = 0; 2962 } 2963 2964 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2965 do_h_free); 2966 } 2967 2968 kfree(adapter->rx_scrq); 2969 adapter->rx_scrq = NULL; 2970 adapter->num_active_rx_scrqs = 0; 2971 } 2972 } 2973 2974 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2975 struct ibmvnic_sub_crq_queue *scrq) 2976 { 2977 struct device *dev = &adapter->vdev->dev; 2978 unsigned long rc; 2979 2980 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2981 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2982 if (rc) 2983 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2984 scrq->hw_irq, rc); 2985 return rc; 2986 } 2987 2988 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2989 struct ibmvnic_sub_crq_queue *scrq) 2990 { 2991 struct device *dev = &adapter->vdev->dev; 2992 unsigned long rc; 2993 2994 if (scrq->hw_irq > 0x100000000ULL) { 2995 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2996 return 1; 2997 } 2998 2999 if (test_bit(0, &adapter->resetting) && 3000 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3001 u64 val = (0xff000000) | scrq->hw_irq; 3002 3003 rc = plpar_hcall_norets(H_EOI, val); 3004 /* H_EOI would fail with rc = H_FUNCTION when running 3005 * in XIVE mode which is expected, but not an error. 3006 */ 3007 if (rc && (rc != H_FUNCTION)) 3008 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3009 val, rc); 3010 } 3011 3012 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3013 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3014 if (rc) 3015 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3016 scrq->hw_irq, rc); 3017 return rc; 3018 } 3019 3020 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3021 struct ibmvnic_sub_crq_queue *scrq) 3022 { 3023 struct device *dev = &adapter->vdev->dev; 3024 struct ibmvnic_tx_pool *tx_pool; 3025 struct ibmvnic_tx_buff *txbuff; 3026 union sub_crq *next; 3027 int index; 3028 int i, j; 3029 3030 restart_loop: 3031 while (pending_scrq(adapter, scrq)) { 3032 unsigned int pool = scrq->pool_index; 3033 int num_entries = 0; 3034 3035 next = ibmvnic_next_scrq(adapter, scrq); 3036 for (i = 0; i < next->tx_comp.num_comps; i++) { 3037 if (next->tx_comp.rcs[i]) { 3038 dev_err(dev, "tx error %x\n", 3039 next->tx_comp.rcs[i]); 3040 continue; 3041 } 3042 index = be32_to_cpu(next->tx_comp.correlators[i]); 3043 if (index & IBMVNIC_TSO_POOL_MASK) { 3044 tx_pool = &adapter->tso_pool[pool]; 3045 index &= ~IBMVNIC_TSO_POOL_MASK; 3046 } else { 3047 tx_pool = &adapter->tx_pool[pool]; 3048 } 3049 3050 txbuff = &tx_pool->tx_buff[index]; 3051 3052 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 3053 if (!txbuff->data_dma[j]) 3054 continue; 3055 3056 txbuff->data_dma[j] = 0; 3057 } 3058 3059 if (txbuff->last_frag) { 3060 dev_kfree_skb_any(txbuff->skb); 3061 txbuff->skb = NULL; 3062 } 3063 3064 num_entries += txbuff->num_entries; 3065 3066 tx_pool->free_map[tx_pool->producer_index] = index; 3067 tx_pool->producer_index = 3068 (tx_pool->producer_index + 1) % 3069 tx_pool->num_buffers; 3070 } 3071 /* remove tx_comp scrq*/ 3072 next->tx_comp.first = 0; 3073 3074 if (atomic_sub_return(num_entries, &scrq->used) <= 3075 (adapter->req_tx_entries_per_subcrq / 2) && 3076 __netif_subqueue_stopped(adapter->netdev, 3077 scrq->pool_index)) { 3078 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3079 netdev_dbg(adapter->netdev, "Started queue %d\n", 3080 scrq->pool_index); 3081 } 3082 } 3083 3084 enable_scrq_irq(adapter, scrq); 3085 3086 if (pending_scrq(adapter, scrq)) { 3087 disable_scrq_irq(adapter, scrq); 3088 goto restart_loop; 3089 } 3090 3091 return 0; 3092 } 3093 3094 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3095 { 3096 struct ibmvnic_sub_crq_queue *scrq = instance; 3097 struct ibmvnic_adapter *adapter = scrq->adapter; 3098 3099 disable_scrq_irq(adapter, scrq); 3100 ibmvnic_complete_tx(adapter, scrq); 3101 3102 return IRQ_HANDLED; 3103 } 3104 3105 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3106 { 3107 struct ibmvnic_sub_crq_queue *scrq = instance; 3108 struct ibmvnic_adapter *adapter = scrq->adapter; 3109 3110 /* When booting a kdump kernel we can hit pending interrupts 3111 * prior to completing driver initialization. 3112 */ 3113 if (unlikely(adapter->state != VNIC_OPEN)) 3114 return IRQ_NONE; 3115 3116 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3117 3118 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3119 disable_scrq_irq(adapter, scrq); 3120 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3121 } 3122 3123 return IRQ_HANDLED; 3124 } 3125 3126 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3127 { 3128 struct device *dev = &adapter->vdev->dev; 3129 struct ibmvnic_sub_crq_queue *scrq; 3130 int i = 0, j = 0; 3131 int rc = 0; 3132 3133 for (i = 0; i < adapter->req_tx_queues; i++) { 3134 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3135 i); 3136 scrq = adapter->tx_scrq[i]; 3137 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3138 3139 if (!scrq->irq) { 3140 rc = -EINVAL; 3141 dev_err(dev, "Error mapping irq\n"); 3142 goto req_tx_irq_failed; 3143 } 3144 3145 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3146 adapter->vdev->unit_address, i); 3147 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3148 0, scrq->name, scrq); 3149 3150 if (rc) { 3151 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3152 scrq->irq, rc); 3153 irq_dispose_mapping(scrq->irq); 3154 goto req_tx_irq_failed; 3155 } 3156 } 3157 3158 for (i = 0; i < adapter->req_rx_queues; i++) { 3159 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3160 i); 3161 scrq = adapter->rx_scrq[i]; 3162 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3163 if (!scrq->irq) { 3164 rc = -EINVAL; 3165 dev_err(dev, "Error mapping irq\n"); 3166 goto req_rx_irq_failed; 3167 } 3168 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3169 adapter->vdev->unit_address, i); 3170 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3171 0, scrq->name, scrq); 3172 if (rc) { 3173 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3174 scrq->irq, rc); 3175 irq_dispose_mapping(scrq->irq); 3176 goto req_rx_irq_failed; 3177 } 3178 } 3179 return rc; 3180 3181 req_rx_irq_failed: 3182 for (j = 0; j < i; j++) { 3183 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3184 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3185 } 3186 i = adapter->req_tx_queues; 3187 req_tx_irq_failed: 3188 for (j = 0; j < i; j++) { 3189 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3190 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3191 } 3192 release_sub_crqs(adapter, 1); 3193 return rc; 3194 } 3195 3196 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3197 { 3198 struct device *dev = &adapter->vdev->dev; 3199 struct ibmvnic_sub_crq_queue **allqueues; 3200 int registered_queues = 0; 3201 int total_queues; 3202 int more = 0; 3203 int i; 3204 3205 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3206 3207 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3208 if (!allqueues) 3209 return -1; 3210 3211 for (i = 0; i < total_queues; i++) { 3212 allqueues[i] = init_sub_crq_queue(adapter); 3213 if (!allqueues[i]) { 3214 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3215 break; 3216 } 3217 registered_queues++; 3218 } 3219 3220 /* Make sure we were able to register the minimum number of queues */ 3221 if (registered_queues < 3222 adapter->min_tx_queues + adapter->min_rx_queues) { 3223 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3224 goto tx_failed; 3225 } 3226 3227 /* Distribute the failed allocated queues*/ 3228 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3229 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3230 switch (i % 3) { 3231 case 0: 3232 if (adapter->req_rx_queues > adapter->min_rx_queues) 3233 adapter->req_rx_queues--; 3234 else 3235 more++; 3236 break; 3237 case 1: 3238 if (adapter->req_tx_queues > adapter->min_tx_queues) 3239 adapter->req_tx_queues--; 3240 else 3241 more++; 3242 break; 3243 } 3244 } 3245 3246 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3247 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3248 if (!adapter->tx_scrq) 3249 goto tx_failed; 3250 3251 for (i = 0; i < adapter->req_tx_queues; i++) { 3252 adapter->tx_scrq[i] = allqueues[i]; 3253 adapter->tx_scrq[i]->pool_index = i; 3254 adapter->num_active_tx_scrqs++; 3255 } 3256 3257 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3258 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3259 if (!adapter->rx_scrq) 3260 goto rx_failed; 3261 3262 for (i = 0; i < adapter->req_rx_queues; i++) { 3263 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3264 adapter->rx_scrq[i]->scrq_num = i; 3265 adapter->num_active_rx_scrqs++; 3266 } 3267 3268 kfree(allqueues); 3269 return 0; 3270 3271 rx_failed: 3272 kfree(adapter->tx_scrq); 3273 adapter->tx_scrq = NULL; 3274 tx_failed: 3275 for (i = 0; i < registered_queues; i++) 3276 release_sub_crq_queue(adapter, allqueues[i], 1); 3277 kfree(allqueues); 3278 return -1; 3279 } 3280 3281 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3282 { 3283 struct device *dev = &adapter->vdev->dev; 3284 union ibmvnic_crq crq; 3285 int max_entries; 3286 3287 if (!retry) { 3288 /* Sub-CRQ entries are 32 byte long */ 3289 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3290 3291 if (adapter->min_tx_entries_per_subcrq > entries_page || 3292 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3293 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3294 return; 3295 } 3296 3297 if (adapter->desired.mtu) 3298 adapter->req_mtu = adapter->desired.mtu; 3299 else 3300 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3301 3302 if (!adapter->desired.tx_entries) 3303 adapter->desired.tx_entries = 3304 adapter->max_tx_entries_per_subcrq; 3305 if (!adapter->desired.rx_entries) 3306 adapter->desired.rx_entries = 3307 adapter->max_rx_add_entries_per_subcrq; 3308 3309 max_entries = IBMVNIC_MAX_LTB_SIZE / 3310 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3311 3312 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3313 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3314 adapter->desired.tx_entries = max_entries; 3315 } 3316 3317 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3318 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3319 adapter->desired.rx_entries = max_entries; 3320 } 3321 3322 if (adapter->desired.tx_entries) 3323 adapter->req_tx_entries_per_subcrq = 3324 adapter->desired.tx_entries; 3325 else 3326 adapter->req_tx_entries_per_subcrq = 3327 adapter->max_tx_entries_per_subcrq; 3328 3329 if (adapter->desired.rx_entries) 3330 adapter->req_rx_add_entries_per_subcrq = 3331 adapter->desired.rx_entries; 3332 else 3333 adapter->req_rx_add_entries_per_subcrq = 3334 adapter->max_rx_add_entries_per_subcrq; 3335 3336 if (adapter->desired.tx_queues) 3337 adapter->req_tx_queues = 3338 adapter->desired.tx_queues; 3339 else 3340 adapter->req_tx_queues = 3341 adapter->opt_tx_comp_sub_queues; 3342 3343 if (adapter->desired.rx_queues) 3344 adapter->req_rx_queues = 3345 adapter->desired.rx_queues; 3346 else 3347 adapter->req_rx_queues = 3348 adapter->opt_rx_comp_queues; 3349 3350 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3351 } 3352 3353 memset(&crq, 0, sizeof(crq)); 3354 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3355 crq.request_capability.cmd = REQUEST_CAPABILITY; 3356 3357 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3358 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3359 atomic_inc(&adapter->running_cap_crqs); 3360 ibmvnic_send_crq(adapter, &crq); 3361 3362 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3363 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3364 atomic_inc(&adapter->running_cap_crqs); 3365 ibmvnic_send_crq(adapter, &crq); 3366 3367 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3368 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3369 atomic_inc(&adapter->running_cap_crqs); 3370 ibmvnic_send_crq(adapter, &crq); 3371 3372 crq.request_capability.capability = 3373 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3374 crq.request_capability.number = 3375 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3376 atomic_inc(&adapter->running_cap_crqs); 3377 ibmvnic_send_crq(adapter, &crq); 3378 3379 crq.request_capability.capability = 3380 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3381 crq.request_capability.number = 3382 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3383 atomic_inc(&adapter->running_cap_crqs); 3384 ibmvnic_send_crq(adapter, &crq); 3385 3386 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3387 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3388 atomic_inc(&adapter->running_cap_crqs); 3389 ibmvnic_send_crq(adapter, &crq); 3390 3391 if (adapter->netdev->flags & IFF_PROMISC) { 3392 if (adapter->promisc_supported) { 3393 crq.request_capability.capability = 3394 cpu_to_be16(PROMISC_REQUESTED); 3395 crq.request_capability.number = cpu_to_be64(1); 3396 atomic_inc(&adapter->running_cap_crqs); 3397 ibmvnic_send_crq(adapter, &crq); 3398 } 3399 } else { 3400 crq.request_capability.capability = 3401 cpu_to_be16(PROMISC_REQUESTED); 3402 crq.request_capability.number = cpu_to_be64(0); 3403 atomic_inc(&adapter->running_cap_crqs); 3404 ibmvnic_send_crq(adapter, &crq); 3405 } 3406 } 3407 3408 static int pending_scrq(struct ibmvnic_adapter *adapter, 3409 struct ibmvnic_sub_crq_queue *scrq) 3410 { 3411 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3412 3413 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3414 return 1; 3415 else 3416 return 0; 3417 } 3418 3419 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3420 struct ibmvnic_sub_crq_queue *scrq) 3421 { 3422 union sub_crq *entry; 3423 unsigned long flags; 3424 3425 spin_lock_irqsave(&scrq->lock, flags); 3426 entry = &scrq->msgs[scrq->cur]; 3427 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3428 if (++scrq->cur == scrq->size) 3429 scrq->cur = 0; 3430 } else { 3431 entry = NULL; 3432 } 3433 spin_unlock_irqrestore(&scrq->lock, flags); 3434 3435 return entry; 3436 } 3437 3438 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3439 { 3440 struct ibmvnic_crq_queue *queue = &adapter->crq; 3441 union ibmvnic_crq *crq; 3442 3443 crq = &queue->msgs[queue->cur]; 3444 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3445 if (++queue->cur == queue->size) 3446 queue->cur = 0; 3447 } else { 3448 crq = NULL; 3449 } 3450 3451 return crq; 3452 } 3453 3454 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3455 { 3456 switch (rc) { 3457 case H_PARAMETER: 3458 dev_warn_ratelimited(dev, 3459 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3460 func, rc); 3461 break; 3462 case H_CLOSED: 3463 dev_warn_ratelimited(dev, 3464 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3465 func, rc); 3466 break; 3467 default: 3468 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3469 break; 3470 } 3471 } 3472 3473 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3474 union sub_crq *sub_crq) 3475 { 3476 unsigned int ua = adapter->vdev->unit_address; 3477 struct device *dev = &adapter->vdev->dev; 3478 u64 *u64_crq = (u64 *)sub_crq; 3479 int rc; 3480 3481 netdev_dbg(adapter->netdev, 3482 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3483 (unsigned long int)cpu_to_be64(remote_handle), 3484 (unsigned long int)cpu_to_be64(u64_crq[0]), 3485 (unsigned long int)cpu_to_be64(u64_crq[1]), 3486 (unsigned long int)cpu_to_be64(u64_crq[2]), 3487 (unsigned long int)cpu_to_be64(u64_crq[3])); 3488 3489 /* Make sure the hypervisor sees the complete request */ 3490 mb(); 3491 3492 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3493 cpu_to_be64(remote_handle), 3494 cpu_to_be64(u64_crq[0]), 3495 cpu_to_be64(u64_crq[1]), 3496 cpu_to_be64(u64_crq[2]), 3497 cpu_to_be64(u64_crq[3])); 3498 3499 if (rc) 3500 print_subcrq_error(dev, rc, __func__); 3501 3502 return rc; 3503 } 3504 3505 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3506 u64 remote_handle, u64 ioba, u64 num_entries) 3507 { 3508 unsigned int ua = adapter->vdev->unit_address; 3509 struct device *dev = &adapter->vdev->dev; 3510 int rc; 3511 3512 /* Make sure the hypervisor sees the complete request */ 3513 mb(); 3514 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3515 cpu_to_be64(remote_handle), 3516 ioba, num_entries); 3517 3518 if (rc) 3519 print_subcrq_error(dev, rc, __func__); 3520 3521 return rc; 3522 } 3523 3524 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3525 union ibmvnic_crq *crq) 3526 { 3527 unsigned int ua = adapter->vdev->unit_address; 3528 struct device *dev = &adapter->vdev->dev; 3529 u64 *u64_crq = (u64 *)crq; 3530 int rc; 3531 3532 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3533 (unsigned long int)cpu_to_be64(u64_crq[0]), 3534 (unsigned long int)cpu_to_be64(u64_crq[1])); 3535 3536 if (!adapter->crq.active && 3537 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3538 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3539 return -EINVAL; 3540 } 3541 3542 /* Make sure the hypervisor sees the complete request */ 3543 mb(); 3544 3545 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3546 cpu_to_be64(u64_crq[0]), 3547 cpu_to_be64(u64_crq[1])); 3548 3549 if (rc) { 3550 if (rc == H_CLOSED) { 3551 dev_warn(dev, "CRQ Queue closed\n"); 3552 if (test_bit(0, &adapter->resetting)) 3553 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3554 } 3555 3556 dev_warn(dev, "Send error (rc=%d)\n", rc); 3557 } 3558 3559 return rc; 3560 } 3561 3562 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3563 { 3564 union ibmvnic_crq crq; 3565 3566 memset(&crq, 0, sizeof(crq)); 3567 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3568 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3569 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3570 3571 return ibmvnic_send_crq(adapter, &crq); 3572 } 3573 3574 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3575 { 3576 union ibmvnic_crq crq; 3577 3578 memset(&crq, 0, sizeof(crq)); 3579 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3580 crq.version_exchange.cmd = VERSION_EXCHANGE; 3581 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3582 3583 return ibmvnic_send_crq(adapter, &crq); 3584 } 3585 3586 struct vnic_login_client_data { 3587 u8 type; 3588 __be16 len; 3589 char name[]; 3590 } __packed; 3591 3592 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3593 { 3594 int len; 3595 3596 /* Calculate the amount of buffer space needed for the 3597 * vnic client data in the login buffer. There are four entries, 3598 * OS name, LPAR name, device name, and a null last entry. 3599 */ 3600 len = 4 * sizeof(struct vnic_login_client_data); 3601 len += 6; /* "Linux" plus NULL */ 3602 len += strlen(utsname()->nodename) + 1; 3603 len += strlen(adapter->netdev->name) + 1; 3604 3605 return len; 3606 } 3607 3608 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3609 struct vnic_login_client_data *vlcd) 3610 { 3611 const char *os_name = "Linux"; 3612 int len; 3613 3614 /* Type 1 - LPAR OS */ 3615 vlcd->type = 1; 3616 len = strlen(os_name) + 1; 3617 vlcd->len = cpu_to_be16(len); 3618 strncpy(vlcd->name, os_name, len); 3619 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3620 3621 /* Type 2 - LPAR name */ 3622 vlcd->type = 2; 3623 len = strlen(utsname()->nodename) + 1; 3624 vlcd->len = cpu_to_be16(len); 3625 strncpy(vlcd->name, utsname()->nodename, len); 3626 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3627 3628 /* Type 3 - device name */ 3629 vlcd->type = 3; 3630 len = strlen(adapter->netdev->name) + 1; 3631 vlcd->len = cpu_to_be16(len); 3632 strncpy(vlcd->name, adapter->netdev->name, len); 3633 } 3634 3635 static int send_login(struct ibmvnic_adapter *adapter) 3636 { 3637 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3638 struct ibmvnic_login_buffer *login_buffer; 3639 struct device *dev = &adapter->vdev->dev; 3640 dma_addr_t rsp_buffer_token; 3641 dma_addr_t buffer_token; 3642 size_t rsp_buffer_size; 3643 union ibmvnic_crq crq; 3644 size_t buffer_size; 3645 __be64 *tx_list_p; 3646 __be64 *rx_list_p; 3647 int client_data_len; 3648 struct vnic_login_client_data *vlcd; 3649 int i; 3650 3651 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3652 netdev_err(adapter->netdev, 3653 "RX or TX queues are not allocated, device login failed\n"); 3654 return -1; 3655 } 3656 3657 release_login_rsp_buffer(adapter); 3658 client_data_len = vnic_client_data_len(adapter); 3659 3660 buffer_size = 3661 sizeof(struct ibmvnic_login_buffer) + 3662 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3663 client_data_len; 3664 3665 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3666 if (!login_buffer) 3667 goto buf_alloc_failed; 3668 3669 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3670 DMA_TO_DEVICE); 3671 if (dma_mapping_error(dev, buffer_token)) { 3672 dev_err(dev, "Couldn't map login buffer\n"); 3673 goto buf_map_failed; 3674 } 3675 3676 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3677 sizeof(u64) * adapter->req_tx_queues + 3678 sizeof(u64) * adapter->req_rx_queues + 3679 sizeof(u64) * adapter->req_rx_queues + 3680 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3681 3682 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3683 if (!login_rsp_buffer) 3684 goto buf_rsp_alloc_failed; 3685 3686 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3687 rsp_buffer_size, DMA_FROM_DEVICE); 3688 if (dma_mapping_error(dev, rsp_buffer_token)) { 3689 dev_err(dev, "Couldn't map login rsp buffer\n"); 3690 goto buf_rsp_map_failed; 3691 } 3692 3693 adapter->login_buf = login_buffer; 3694 adapter->login_buf_token = buffer_token; 3695 adapter->login_buf_sz = buffer_size; 3696 adapter->login_rsp_buf = login_rsp_buffer; 3697 adapter->login_rsp_buf_token = rsp_buffer_token; 3698 adapter->login_rsp_buf_sz = rsp_buffer_size; 3699 3700 login_buffer->len = cpu_to_be32(buffer_size); 3701 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3702 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3703 login_buffer->off_txcomp_subcrqs = 3704 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3705 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3706 login_buffer->off_rxcomp_subcrqs = 3707 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3708 sizeof(u64) * adapter->req_tx_queues); 3709 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3710 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3711 3712 tx_list_p = (__be64 *)((char *)login_buffer + 3713 sizeof(struct ibmvnic_login_buffer)); 3714 rx_list_p = (__be64 *)((char *)login_buffer + 3715 sizeof(struct ibmvnic_login_buffer) + 3716 sizeof(u64) * adapter->req_tx_queues); 3717 3718 for (i = 0; i < adapter->req_tx_queues; i++) { 3719 if (adapter->tx_scrq[i]) { 3720 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3721 crq_num); 3722 } 3723 } 3724 3725 for (i = 0; i < adapter->req_rx_queues; i++) { 3726 if (adapter->rx_scrq[i]) { 3727 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3728 crq_num); 3729 } 3730 } 3731 3732 /* Insert vNIC login client data */ 3733 vlcd = (struct vnic_login_client_data *) 3734 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3735 login_buffer->client_data_offset = 3736 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3737 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3738 3739 vnic_add_client_data(adapter, vlcd); 3740 3741 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3742 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3743 netdev_dbg(adapter->netdev, "%016lx\n", 3744 ((unsigned long int *)(adapter->login_buf))[i]); 3745 } 3746 3747 memset(&crq, 0, sizeof(crq)); 3748 crq.login.first = IBMVNIC_CRQ_CMD; 3749 crq.login.cmd = LOGIN; 3750 crq.login.ioba = cpu_to_be32(buffer_token); 3751 crq.login.len = cpu_to_be32(buffer_size); 3752 ibmvnic_send_crq(adapter, &crq); 3753 3754 return 0; 3755 3756 buf_rsp_map_failed: 3757 kfree(login_rsp_buffer); 3758 buf_rsp_alloc_failed: 3759 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3760 buf_map_failed: 3761 kfree(login_buffer); 3762 buf_alloc_failed: 3763 return -1; 3764 } 3765 3766 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3767 u32 len, u8 map_id) 3768 { 3769 union ibmvnic_crq crq; 3770 3771 memset(&crq, 0, sizeof(crq)); 3772 crq.request_map.first = IBMVNIC_CRQ_CMD; 3773 crq.request_map.cmd = REQUEST_MAP; 3774 crq.request_map.map_id = map_id; 3775 crq.request_map.ioba = cpu_to_be32(addr); 3776 crq.request_map.len = cpu_to_be32(len); 3777 return ibmvnic_send_crq(adapter, &crq); 3778 } 3779 3780 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3781 { 3782 union ibmvnic_crq crq; 3783 3784 memset(&crq, 0, sizeof(crq)); 3785 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3786 crq.request_unmap.cmd = REQUEST_UNMAP; 3787 crq.request_unmap.map_id = map_id; 3788 return ibmvnic_send_crq(adapter, &crq); 3789 } 3790 3791 static void send_map_query(struct ibmvnic_adapter *adapter) 3792 { 3793 union ibmvnic_crq crq; 3794 3795 memset(&crq, 0, sizeof(crq)); 3796 crq.query_map.first = IBMVNIC_CRQ_CMD; 3797 crq.query_map.cmd = QUERY_MAP; 3798 ibmvnic_send_crq(adapter, &crq); 3799 } 3800 3801 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3802 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3803 { 3804 union ibmvnic_crq crq; 3805 3806 atomic_set(&adapter->running_cap_crqs, 0); 3807 memset(&crq, 0, sizeof(crq)); 3808 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3809 crq.query_capability.cmd = QUERY_CAPABILITY; 3810 3811 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3812 atomic_inc(&adapter->running_cap_crqs); 3813 ibmvnic_send_crq(adapter, &crq); 3814 3815 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3816 atomic_inc(&adapter->running_cap_crqs); 3817 ibmvnic_send_crq(adapter, &crq); 3818 3819 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3820 atomic_inc(&adapter->running_cap_crqs); 3821 ibmvnic_send_crq(adapter, &crq); 3822 3823 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3824 atomic_inc(&adapter->running_cap_crqs); 3825 ibmvnic_send_crq(adapter, &crq); 3826 3827 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3828 atomic_inc(&adapter->running_cap_crqs); 3829 ibmvnic_send_crq(adapter, &crq); 3830 3831 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3832 atomic_inc(&adapter->running_cap_crqs); 3833 ibmvnic_send_crq(adapter, &crq); 3834 3835 crq.query_capability.capability = 3836 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3837 atomic_inc(&adapter->running_cap_crqs); 3838 ibmvnic_send_crq(adapter, &crq); 3839 3840 crq.query_capability.capability = 3841 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3842 atomic_inc(&adapter->running_cap_crqs); 3843 ibmvnic_send_crq(adapter, &crq); 3844 3845 crq.query_capability.capability = 3846 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3847 atomic_inc(&adapter->running_cap_crqs); 3848 ibmvnic_send_crq(adapter, &crq); 3849 3850 crq.query_capability.capability = 3851 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3852 atomic_inc(&adapter->running_cap_crqs); 3853 ibmvnic_send_crq(adapter, &crq); 3854 3855 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3856 atomic_inc(&adapter->running_cap_crqs); 3857 ibmvnic_send_crq(adapter, &crq); 3858 3859 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3860 atomic_inc(&adapter->running_cap_crqs); 3861 ibmvnic_send_crq(adapter, &crq); 3862 3863 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3864 atomic_inc(&adapter->running_cap_crqs); 3865 ibmvnic_send_crq(adapter, &crq); 3866 3867 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3868 atomic_inc(&adapter->running_cap_crqs); 3869 ibmvnic_send_crq(adapter, &crq); 3870 3871 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3872 atomic_inc(&adapter->running_cap_crqs); 3873 ibmvnic_send_crq(adapter, &crq); 3874 3875 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3876 atomic_inc(&adapter->running_cap_crqs); 3877 ibmvnic_send_crq(adapter, &crq); 3878 3879 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3880 atomic_inc(&adapter->running_cap_crqs); 3881 ibmvnic_send_crq(adapter, &crq); 3882 3883 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3884 atomic_inc(&adapter->running_cap_crqs); 3885 ibmvnic_send_crq(adapter, &crq); 3886 3887 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3888 atomic_inc(&adapter->running_cap_crqs); 3889 ibmvnic_send_crq(adapter, &crq); 3890 3891 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3892 atomic_inc(&adapter->running_cap_crqs); 3893 ibmvnic_send_crq(adapter, &crq); 3894 3895 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3896 atomic_inc(&adapter->running_cap_crqs); 3897 ibmvnic_send_crq(adapter, &crq); 3898 3899 crq.query_capability.capability = 3900 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3901 atomic_inc(&adapter->running_cap_crqs); 3902 ibmvnic_send_crq(adapter, &crq); 3903 3904 crq.query_capability.capability = 3905 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3906 atomic_inc(&adapter->running_cap_crqs); 3907 ibmvnic_send_crq(adapter, &crq); 3908 3909 crq.query_capability.capability = 3910 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3911 atomic_inc(&adapter->running_cap_crqs); 3912 ibmvnic_send_crq(adapter, &crq); 3913 3914 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3915 atomic_inc(&adapter->running_cap_crqs); 3916 ibmvnic_send_crq(adapter, &crq); 3917 } 3918 3919 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3920 struct ibmvnic_adapter *adapter) 3921 { 3922 struct device *dev = &adapter->vdev->dev; 3923 3924 if (crq->get_vpd_size_rsp.rc.code) { 3925 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3926 crq->get_vpd_size_rsp.rc.code); 3927 complete(&adapter->fw_done); 3928 return; 3929 } 3930 3931 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3932 complete(&adapter->fw_done); 3933 } 3934 3935 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3936 struct ibmvnic_adapter *adapter) 3937 { 3938 struct device *dev = &adapter->vdev->dev; 3939 unsigned char *substr = NULL; 3940 u8 fw_level_len = 0; 3941 3942 memset(adapter->fw_version, 0, 32); 3943 3944 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3945 DMA_FROM_DEVICE); 3946 3947 if (crq->get_vpd_rsp.rc.code) { 3948 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3949 crq->get_vpd_rsp.rc.code); 3950 goto complete; 3951 } 3952 3953 /* get the position of the firmware version info 3954 * located after the ASCII 'RM' substring in the buffer 3955 */ 3956 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3957 if (!substr) { 3958 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3959 goto complete; 3960 } 3961 3962 /* get length of firmware level ASCII substring */ 3963 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3964 fw_level_len = *(substr + 2); 3965 } else { 3966 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3967 goto complete; 3968 } 3969 3970 /* copy firmware version string from vpd into adapter */ 3971 if ((substr + 3 + fw_level_len) < 3972 (adapter->vpd->buff + adapter->vpd->len)) { 3973 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3974 } else { 3975 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3976 } 3977 3978 complete: 3979 if (adapter->fw_version[0] == '\0') 3980 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3981 complete(&adapter->fw_done); 3982 } 3983 3984 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3985 { 3986 struct device *dev = &adapter->vdev->dev; 3987 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3988 netdev_features_t old_hw_features = 0; 3989 union ibmvnic_crq crq; 3990 int i; 3991 3992 dma_unmap_single(dev, adapter->ip_offload_tok, 3993 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3994 3995 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3996 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3997 netdev_dbg(adapter->netdev, "%016lx\n", 3998 ((unsigned long int *)(buf))[i]); 3999 4000 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4001 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4002 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4003 buf->tcp_ipv4_chksum); 4004 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4005 buf->tcp_ipv6_chksum); 4006 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4007 buf->udp_ipv4_chksum); 4008 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4009 buf->udp_ipv6_chksum); 4010 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4011 buf->large_tx_ipv4); 4012 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4013 buf->large_tx_ipv6); 4014 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4015 buf->large_rx_ipv4); 4016 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4017 buf->large_rx_ipv6); 4018 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4019 buf->max_ipv4_header_size); 4020 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4021 buf->max_ipv6_header_size); 4022 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4023 buf->max_tcp_header_size); 4024 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4025 buf->max_udp_header_size); 4026 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4027 buf->max_large_tx_size); 4028 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4029 buf->max_large_rx_size); 4030 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4031 buf->ipv6_extension_header); 4032 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4033 buf->tcp_pseudosum_req); 4034 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4035 buf->num_ipv6_ext_headers); 4036 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4037 buf->off_ipv6_ext_headers); 4038 4039 adapter->ip_offload_ctrl_tok = 4040 dma_map_single(dev, &adapter->ip_offload_ctrl, 4041 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 4042 4043 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4044 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4045 return; 4046 } 4047 4048 adapter->ip_offload_ctrl.len = 4049 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4050 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 4051 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 4052 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 4053 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4054 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 4055 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4056 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 4057 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 4058 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 4059 4060 /* large_rx disabled for now, additional features needed */ 4061 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 4062 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 4063 4064 if (adapter->state != VNIC_PROBING) { 4065 old_hw_features = adapter->netdev->hw_features; 4066 adapter->netdev->hw_features = 0; 4067 } 4068 4069 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4070 4071 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4072 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4073 4074 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4075 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4076 4077 if ((adapter->netdev->features & 4078 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4079 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4080 4081 if (buf->large_tx_ipv4) 4082 adapter->netdev->hw_features |= NETIF_F_TSO; 4083 if (buf->large_tx_ipv6) 4084 adapter->netdev->hw_features |= NETIF_F_TSO6; 4085 4086 if (adapter->state == VNIC_PROBING) { 4087 adapter->netdev->features |= adapter->netdev->hw_features; 4088 } else if (old_hw_features != adapter->netdev->hw_features) { 4089 netdev_features_t tmp = 0; 4090 4091 /* disable features no longer supported */ 4092 adapter->netdev->features &= adapter->netdev->hw_features; 4093 /* turn on features now supported if previously enabled */ 4094 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4095 adapter->netdev->hw_features; 4096 adapter->netdev->features |= 4097 tmp & adapter->netdev->wanted_features; 4098 } 4099 4100 memset(&crq, 0, sizeof(crq)); 4101 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4102 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4103 crq.control_ip_offload.len = 4104 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4105 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4106 ibmvnic_send_crq(adapter, &crq); 4107 } 4108 4109 static const char *ibmvnic_fw_err_cause(u16 cause) 4110 { 4111 switch (cause) { 4112 case ADAPTER_PROBLEM: 4113 return "adapter problem"; 4114 case BUS_PROBLEM: 4115 return "bus problem"; 4116 case FW_PROBLEM: 4117 return "firmware problem"; 4118 case DD_PROBLEM: 4119 return "device driver problem"; 4120 case EEH_RECOVERY: 4121 return "EEH recovery"; 4122 case FW_UPDATED: 4123 return "firmware updated"; 4124 case LOW_MEMORY: 4125 return "low Memory"; 4126 default: 4127 return "unknown"; 4128 } 4129 } 4130 4131 static void handle_error_indication(union ibmvnic_crq *crq, 4132 struct ibmvnic_adapter *adapter) 4133 { 4134 struct device *dev = &adapter->vdev->dev; 4135 u16 cause; 4136 4137 cause = be16_to_cpu(crq->error_indication.error_cause); 4138 4139 dev_warn_ratelimited(dev, 4140 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4141 crq->error_indication.flags 4142 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4143 ibmvnic_fw_err_cause(cause)); 4144 4145 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4146 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4147 else 4148 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4149 } 4150 4151 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4152 struct ibmvnic_adapter *adapter) 4153 { 4154 struct net_device *netdev = adapter->netdev; 4155 struct device *dev = &adapter->vdev->dev; 4156 long rc; 4157 4158 rc = crq->change_mac_addr_rsp.rc.code; 4159 if (rc) { 4160 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4161 goto out; 4162 } 4163 ether_addr_copy(netdev->dev_addr, 4164 &crq->change_mac_addr_rsp.mac_addr[0]); 4165 out: 4166 complete(&adapter->fw_done); 4167 return rc; 4168 } 4169 4170 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4171 struct ibmvnic_adapter *adapter) 4172 { 4173 struct device *dev = &adapter->vdev->dev; 4174 u64 *req_value; 4175 char *name; 4176 4177 atomic_dec(&adapter->running_cap_crqs); 4178 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4179 case REQ_TX_QUEUES: 4180 req_value = &adapter->req_tx_queues; 4181 name = "tx"; 4182 break; 4183 case REQ_RX_QUEUES: 4184 req_value = &adapter->req_rx_queues; 4185 name = "rx"; 4186 break; 4187 case REQ_RX_ADD_QUEUES: 4188 req_value = &adapter->req_rx_add_queues; 4189 name = "rx_add"; 4190 break; 4191 case REQ_TX_ENTRIES_PER_SUBCRQ: 4192 req_value = &adapter->req_tx_entries_per_subcrq; 4193 name = "tx_entries_per_subcrq"; 4194 break; 4195 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4196 req_value = &adapter->req_rx_add_entries_per_subcrq; 4197 name = "rx_add_entries_per_subcrq"; 4198 break; 4199 case REQ_MTU: 4200 req_value = &adapter->req_mtu; 4201 name = "mtu"; 4202 break; 4203 case PROMISC_REQUESTED: 4204 req_value = &adapter->promisc; 4205 name = "promisc"; 4206 break; 4207 default: 4208 dev_err(dev, "Got invalid cap request rsp %d\n", 4209 crq->request_capability.capability); 4210 return; 4211 } 4212 4213 switch (crq->request_capability_rsp.rc.code) { 4214 case SUCCESS: 4215 break; 4216 case PARTIALSUCCESS: 4217 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4218 *req_value, 4219 (long int)be64_to_cpu(crq->request_capability_rsp. 4220 number), name); 4221 4222 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4223 REQ_MTU) { 4224 pr_err("mtu of %llu is not supported. Reverting.\n", 4225 *req_value); 4226 *req_value = adapter->fallback.mtu; 4227 } else { 4228 *req_value = 4229 be64_to_cpu(crq->request_capability_rsp.number); 4230 } 4231 4232 ibmvnic_send_req_caps(adapter, 1); 4233 return; 4234 default: 4235 dev_err(dev, "Error %d in request cap rsp\n", 4236 crq->request_capability_rsp.rc.code); 4237 return; 4238 } 4239 4240 /* Done receiving requested capabilities, query IP offload support */ 4241 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4242 union ibmvnic_crq newcrq; 4243 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4244 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4245 &adapter->ip_offload_buf; 4246 4247 adapter->wait_capability = false; 4248 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4249 buf_sz, 4250 DMA_FROM_DEVICE); 4251 4252 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4253 if (!firmware_has_feature(FW_FEATURE_CMO)) 4254 dev_err(dev, "Couldn't map offload buffer\n"); 4255 return; 4256 } 4257 4258 memset(&newcrq, 0, sizeof(newcrq)); 4259 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4260 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4261 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4262 newcrq.query_ip_offload.ioba = 4263 cpu_to_be32(adapter->ip_offload_tok); 4264 4265 ibmvnic_send_crq(adapter, &newcrq); 4266 } 4267 } 4268 4269 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4270 struct ibmvnic_adapter *adapter) 4271 { 4272 struct device *dev = &adapter->vdev->dev; 4273 struct net_device *netdev = adapter->netdev; 4274 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4275 struct ibmvnic_login_buffer *login = adapter->login_buf; 4276 int i; 4277 4278 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4279 DMA_TO_DEVICE); 4280 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4281 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4282 4283 /* If the number of queues requested can't be allocated by the 4284 * server, the login response will return with code 1. We will need 4285 * to resend the login buffer with fewer queues requested. 4286 */ 4287 if (login_rsp_crq->generic.rc.code) { 4288 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4289 complete(&adapter->init_done); 4290 return 0; 4291 } 4292 4293 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4294 4295 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4296 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4297 netdev_dbg(adapter->netdev, "%016lx\n", 4298 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4299 } 4300 4301 /* Sanity checks */ 4302 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4303 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4304 adapter->req_rx_add_queues != 4305 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4306 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4307 ibmvnic_remove(adapter->vdev); 4308 return -EIO; 4309 } 4310 release_login_buffer(adapter); 4311 complete(&adapter->init_done); 4312 4313 return 0; 4314 } 4315 4316 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4317 struct ibmvnic_adapter *adapter) 4318 { 4319 struct device *dev = &adapter->vdev->dev; 4320 long rc; 4321 4322 rc = crq->request_unmap_rsp.rc.code; 4323 if (rc) 4324 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4325 } 4326 4327 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4328 struct ibmvnic_adapter *adapter) 4329 { 4330 struct net_device *netdev = adapter->netdev; 4331 struct device *dev = &adapter->vdev->dev; 4332 long rc; 4333 4334 rc = crq->query_map_rsp.rc.code; 4335 if (rc) { 4336 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4337 return; 4338 } 4339 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4340 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4341 crq->query_map_rsp.free_pages); 4342 } 4343 4344 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4345 struct ibmvnic_adapter *adapter) 4346 { 4347 struct net_device *netdev = adapter->netdev; 4348 struct device *dev = &adapter->vdev->dev; 4349 long rc; 4350 4351 atomic_dec(&adapter->running_cap_crqs); 4352 netdev_dbg(netdev, "Outstanding queries: %d\n", 4353 atomic_read(&adapter->running_cap_crqs)); 4354 rc = crq->query_capability.rc.code; 4355 if (rc) { 4356 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4357 goto out; 4358 } 4359 4360 switch (be16_to_cpu(crq->query_capability.capability)) { 4361 case MIN_TX_QUEUES: 4362 adapter->min_tx_queues = 4363 be64_to_cpu(crq->query_capability.number); 4364 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4365 adapter->min_tx_queues); 4366 break; 4367 case MIN_RX_QUEUES: 4368 adapter->min_rx_queues = 4369 be64_to_cpu(crq->query_capability.number); 4370 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4371 adapter->min_rx_queues); 4372 break; 4373 case MIN_RX_ADD_QUEUES: 4374 adapter->min_rx_add_queues = 4375 be64_to_cpu(crq->query_capability.number); 4376 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4377 adapter->min_rx_add_queues); 4378 break; 4379 case MAX_TX_QUEUES: 4380 adapter->max_tx_queues = 4381 be64_to_cpu(crq->query_capability.number); 4382 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4383 adapter->max_tx_queues); 4384 break; 4385 case MAX_RX_QUEUES: 4386 adapter->max_rx_queues = 4387 be64_to_cpu(crq->query_capability.number); 4388 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4389 adapter->max_rx_queues); 4390 break; 4391 case MAX_RX_ADD_QUEUES: 4392 adapter->max_rx_add_queues = 4393 be64_to_cpu(crq->query_capability.number); 4394 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4395 adapter->max_rx_add_queues); 4396 break; 4397 case MIN_TX_ENTRIES_PER_SUBCRQ: 4398 adapter->min_tx_entries_per_subcrq = 4399 be64_to_cpu(crq->query_capability.number); 4400 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4401 adapter->min_tx_entries_per_subcrq); 4402 break; 4403 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4404 adapter->min_rx_add_entries_per_subcrq = 4405 be64_to_cpu(crq->query_capability.number); 4406 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4407 adapter->min_rx_add_entries_per_subcrq); 4408 break; 4409 case MAX_TX_ENTRIES_PER_SUBCRQ: 4410 adapter->max_tx_entries_per_subcrq = 4411 be64_to_cpu(crq->query_capability.number); 4412 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4413 adapter->max_tx_entries_per_subcrq); 4414 break; 4415 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4416 adapter->max_rx_add_entries_per_subcrq = 4417 be64_to_cpu(crq->query_capability.number); 4418 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4419 adapter->max_rx_add_entries_per_subcrq); 4420 break; 4421 case TCP_IP_OFFLOAD: 4422 adapter->tcp_ip_offload = 4423 be64_to_cpu(crq->query_capability.number); 4424 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4425 adapter->tcp_ip_offload); 4426 break; 4427 case PROMISC_SUPPORTED: 4428 adapter->promisc_supported = 4429 be64_to_cpu(crq->query_capability.number); 4430 netdev_dbg(netdev, "promisc_supported = %lld\n", 4431 adapter->promisc_supported); 4432 break; 4433 case MIN_MTU: 4434 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4435 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4436 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4437 break; 4438 case MAX_MTU: 4439 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4440 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4441 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4442 break; 4443 case MAX_MULTICAST_FILTERS: 4444 adapter->max_multicast_filters = 4445 be64_to_cpu(crq->query_capability.number); 4446 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4447 adapter->max_multicast_filters); 4448 break; 4449 case VLAN_HEADER_INSERTION: 4450 adapter->vlan_header_insertion = 4451 be64_to_cpu(crq->query_capability.number); 4452 if (adapter->vlan_header_insertion) 4453 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4454 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4455 adapter->vlan_header_insertion); 4456 break; 4457 case RX_VLAN_HEADER_INSERTION: 4458 adapter->rx_vlan_header_insertion = 4459 be64_to_cpu(crq->query_capability.number); 4460 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4461 adapter->rx_vlan_header_insertion); 4462 break; 4463 case MAX_TX_SG_ENTRIES: 4464 adapter->max_tx_sg_entries = 4465 be64_to_cpu(crq->query_capability.number); 4466 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4467 adapter->max_tx_sg_entries); 4468 break; 4469 case RX_SG_SUPPORTED: 4470 adapter->rx_sg_supported = 4471 be64_to_cpu(crq->query_capability.number); 4472 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4473 adapter->rx_sg_supported); 4474 break; 4475 case OPT_TX_COMP_SUB_QUEUES: 4476 adapter->opt_tx_comp_sub_queues = 4477 be64_to_cpu(crq->query_capability.number); 4478 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4479 adapter->opt_tx_comp_sub_queues); 4480 break; 4481 case OPT_RX_COMP_QUEUES: 4482 adapter->opt_rx_comp_queues = 4483 be64_to_cpu(crq->query_capability.number); 4484 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4485 adapter->opt_rx_comp_queues); 4486 break; 4487 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4488 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4489 be64_to_cpu(crq->query_capability.number); 4490 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4491 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4492 break; 4493 case OPT_TX_ENTRIES_PER_SUBCRQ: 4494 adapter->opt_tx_entries_per_subcrq = 4495 be64_to_cpu(crq->query_capability.number); 4496 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4497 adapter->opt_tx_entries_per_subcrq); 4498 break; 4499 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4500 adapter->opt_rxba_entries_per_subcrq = 4501 be64_to_cpu(crq->query_capability.number); 4502 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4503 adapter->opt_rxba_entries_per_subcrq); 4504 break; 4505 case TX_RX_DESC_REQ: 4506 adapter->tx_rx_desc_req = crq->query_capability.number; 4507 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4508 adapter->tx_rx_desc_req); 4509 break; 4510 4511 default: 4512 netdev_err(netdev, "Got invalid cap rsp %d\n", 4513 crq->query_capability.capability); 4514 } 4515 4516 out: 4517 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4518 adapter->wait_capability = false; 4519 ibmvnic_send_req_caps(adapter, 0); 4520 } 4521 } 4522 4523 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4524 { 4525 union ibmvnic_crq crq; 4526 int rc; 4527 4528 memset(&crq, 0, sizeof(crq)); 4529 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4530 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4531 4532 mutex_lock(&adapter->fw_lock); 4533 adapter->fw_done_rc = 0; 4534 reinit_completion(&adapter->fw_done); 4535 4536 rc = ibmvnic_send_crq(adapter, &crq); 4537 if (rc) { 4538 mutex_unlock(&adapter->fw_lock); 4539 return rc; 4540 } 4541 4542 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4543 if (rc) { 4544 mutex_unlock(&adapter->fw_lock); 4545 return rc; 4546 } 4547 4548 mutex_unlock(&adapter->fw_lock); 4549 return adapter->fw_done_rc ? -EIO : 0; 4550 } 4551 4552 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4553 struct ibmvnic_adapter *adapter) 4554 { 4555 struct net_device *netdev = adapter->netdev; 4556 int rc; 4557 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4558 4559 rc = crq->query_phys_parms_rsp.rc.code; 4560 if (rc) { 4561 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4562 return rc; 4563 } 4564 switch (rspeed) { 4565 case IBMVNIC_10MBPS: 4566 adapter->speed = SPEED_10; 4567 break; 4568 case IBMVNIC_100MBPS: 4569 adapter->speed = SPEED_100; 4570 break; 4571 case IBMVNIC_1GBPS: 4572 adapter->speed = SPEED_1000; 4573 break; 4574 case IBMVNIC_10GBP: 4575 adapter->speed = SPEED_10000; 4576 break; 4577 case IBMVNIC_25GBPS: 4578 adapter->speed = SPEED_25000; 4579 break; 4580 case IBMVNIC_40GBPS: 4581 adapter->speed = SPEED_40000; 4582 break; 4583 case IBMVNIC_50GBPS: 4584 adapter->speed = SPEED_50000; 4585 break; 4586 case IBMVNIC_100GBPS: 4587 adapter->speed = SPEED_100000; 4588 break; 4589 default: 4590 if (netif_carrier_ok(netdev)) 4591 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4592 adapter->speed = SPEED_UNKNOWN; 4593 } 4594 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4595 adapter->duplex = DUPLEX_FULL; 4596 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4597 adapter->duplex = DUPLEX_HALF; 4598 else 4599 adapter->duplex = DUPLEX_UNKNOWN; 4600 4601 return rc; 4602 } 4603 4604 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4605 struct ibmvnic_adapter *adapter) 4606 { 4607 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4608 struct net_device *netdev = adapter->netdev; 4609 struct device *dev = &adapter->vdev->dev; 4610 u64 *u64_crq = (u64 *)crq; 4611 long rc; 4612 4613 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4614 (unsigned long int)cpu_to_be64(u64_crq[0]), 4615 (unsigned long int)cpu_to_be64(u64_crq[1])); 4616 switch (gen_crq->first) { 4617 case IBMVNIC_CRQ_INIT_RSP: 4618 switch (gen_crq->cmd) { 4619 case IBMVNIC_CRQ_INIT: 4620 dev_info(dev, "Partner initialized\n"); 4621 adapter->from_passive_init = true; 4622 adapter->failover_pending = false; 4623 if (!completion_done(&adapter->init_done)) { 4624 complete(&adapter->init_done); 4625 adapter->init_done_rc = -EIO; 4626 } 4627 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4628 break; 4629 case IBMVNIC_CRQ_INIT_COMPLETE: 4630 dev_info(dev, "Partner initialization complete\n"); 4631 adapter->crq.active = true; 4632 send_version_xchg(adapter); 4633 break; 4634 default: 4635 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4636 } 4637 return; 4638 case IBMVNIC_CRQ_XPORT_EVENT: 4639 netif_carrier_off(netdev); 4640 adapter->crq.active = false; 4641 /* terminate any thread waiting for a response 4642 * from the device 4643 */ 4644 if (!completion_done(&adapter->fw_done)) { 4645 adapter->fw_done_rc = -EIO; 4646 complete(&adapter->fw_done); 4647 } 4648 if (!completion_done(&adapter->stats_done)) 4649 complete(&adapter->stats_done); 4650 if (test_bit(0, &adapter->resetting)) 4651 adapter->force_reset_recovery = true; 4652 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4653 dev_info(dev, "Migrated, re-enabling adapter\n"); 4654 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4655 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4656 dev_info(dev, "Backing device failover detected\n"); 4657 adapter->failover_pending = true; 4658 } else { 4659 /* The adapter lost the connection */ 4660 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4661 gen_crq->cmd); 4662 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4663 } 4664 return; 4665 case IBMVNIC_CRQ_CMD_RSP: 4666 break; 4667 default: 4668 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4669 gen_crq->first); 4670 return; 4671 } 4672 4673 switch (gen_crq->cmd) { 4674 case VERSION_EXCHANGE_RSP: 4675 rc = crq->version_exchange_rsp.rc.code; 4676 if (rc) { 4677 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4678 break; 4679 } 4680 dev_info(dev, "Partner protocol version is %d\n", 4681 crq->version_exchange_rsp.version); 4682 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4683 ibmvnic_version) 4684 ibmvnic_version = 4685 be16_to_cpu(crq->version_exchange_rsp.version); 4686 send_cap_queries(adapter); 4687 break; 4688 case QUERY_CAPABILITY_RSP: 4689 handle_query_cap_rsp(crq, adapter); 4690 break; 4691 case QUERY_MAP_RSP: 4692 handle_query_map_rsp(crq, adapter); 4693 break; 4694 case REQUEST_MAP_RSP: 4695 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4696 complete(&adapter->fw_done); 4697 break; 4698 case REQUEST_UNMAP_RSP: 4699 handle_request_unmap_rsp(crq, adapter); 4700 break; 4701 case REQUEST_CAPABILITY_RSP: 4702 handle_request_cap_rsp(crq, adapter); 4703 break; 4704 case LOGIN_RSP: 4705 netdev_dbg(netdev, "Got Login Response\n"); 4706 handle_login_rsp(crq, adapter); 4707 break; 4708 case LOGICAL_LINK_STATE_RSP: 4709 netdev_dbg(netdev, 4710 "Got Logical Link State Response, state: %d rc: %d\n", 4711 crq->logical_link_state_rsp.link_state, 4712 crq->logical_link_state_rsp.rc.code); 4713 adapter->logical_link_state = 4714 crq->logical_link_state_rsp.link_state; 4715 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4716 complete(&adapter->init_done); 4717 break; 4718 case LINK_STATE_INDICATION: 4719 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4720 adapter->phys_link_state = 4721 crq->link_state_indication.phys_link_state; 4722 adapter->logical_link_state = 4723 crq->link_state_indication.logical_link_state; 4724 if (adapter->phys_link_state && adapter->logical_link_state) 4725 netif_carrier_on(netdev); 4726 else 4727 netif_carrier_off(netdev); 4728 break; 4729 case CHANGE_MAC_ADDR_RSP: 4730 netdev_dbg(netdev, "Got MAC address change Response\n"); 4731 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4732 break; 4733 case ERROR_INDICATION: 4734 netdev_dbg(netdev, "Got Error Indication\n"); 4735 handle_error_indication(crq, adapter); 4736 break; 4737 case REQUEST_STATISTICS_RSP: 4738 netdev_dbg(netdev, "Got Statistics Response\n"); 4739 complete(&adapter->stats_done); 4740 break; 4741 case QUERY_IP_OFFLOAD_RSP: 4742 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4743 handle_query_ip_offload_rsp(adapter); 4744 break; 4745 case MULTICAST_CTRL_RSP: 4746 netdev_dbg(netdev, "Got multicast control Response\n"); 4747 break; 4748 case CONTROL_IP_OFFLOAD_RSP: 4749 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4750 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4751 sizeof(adapter->ip_offload_ctrl), 4752 DMA_TO_DEVICE); 4753 complete(&adapter->init_done); 4754 break; 4755 case COLLECT_FW_TRACE_RSP: 4756 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4757 complete(&adapter->fw_done); 4758 break; 4759 case GET_VPD_SIZE_RSP: 4760 handle_vpd_size_rsp(crq, adapter); 4761 break; 4762 case GET_VPD_RSP: 4763 handle_vpd_rsp(crq, adapter); 4764 break; 4765 case QUERY_PHYS_PARMS_RSP: 4766 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4767 complete(&adapter->fw_done); 4768 break; 4769 default: 4770 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4771 gen_crq->cmd); 4772 } 4773 } 4774 4775 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4776 { 4777 struct ibmvnic_adapter *adapter = instance; 4778 4779 tasklet_schedule(&adapter->tasklet); 4780 return IRQ_HANDLED; 4781 } 4782 4783 static void ibmvnic_tasklet(void *data) 4784 { 4785 struct ibmvnic_adapter *adapter = data; 4786 struct ibmvnic_crq_queue *queue = &adapter->crq; 4787 union ibmvnic_crq *crq; 4788 unsigned long flags; 4789 bool done = false; 4790 4791 spin_lock_irqsave(&queue->lock, flags); 4792 while (!done) { 4793 /* Pull all the valid messages off the CRQ */ 4794 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4795 ibmvnic_handle_crq(crq, adapter); 4796 crq->generic.first = 0; 4797 } 4798 4799 /* remain in tasklet until all 4800 * capabilities responses are received 4801 */ 4802 if (!adapter->wait_capability) 4803 done = true; 4804 } 4805 /* if capabilities CRQ's were sent in this tasklet, the following 4806 * tasklet must wait until all responses are received 4807 */ 4808 if (atomic_read(&adapter->running_cap_crqs) != 0) 4809 adapter->wait_capability = true; 4810 spin_unlock_irqrestore(&queue->lock, flags); 4811 } 4812 4813 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4814 { 4815 struct vio_dev *vdev = adapter->vdev; 4816 int rc; 4817 4818 do { 4819 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4820 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4821 4822 if (rc) 4823 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4824 4825 return rc; 4826 } 4827 4828 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4829 { 4830 struct ibmvnic_crq_queue *crq = &adapter->crq; 4831 struct device *dev = &adapter->vdev->dev; 4832 struct vio_dev *vdev = adapter->vdev; 4833 int rc; 4834 4835 /* Close the CRQ */ 4836 do { 4837 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4838 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4839 4840 /* Clean out the queue */ 4841 memset(crq->msgs, 0, PAGE_SIZE); 4842 crq->cur = 0; 4843 crq->active = false; 4844 4845 /* And re-open it again */ 4846 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4847 crq->msg_token, PAGE_SIZE); 4848 4849 if (rc == H_CLOSED) 4850 /* Adapter is good, but other end is not ready */ 4851 dev_warn(dev, "Partner adapter not ready\n"); 4852 else if (rc != 0) 4853 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4854 4855 return rc; 4856 } 4857 4858 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4859 { 4860 struct ibmvnic_crq_queue *crq = &adapter->crq; 4861 struct vio_dev *vdev = adapter->vdev; 4862 long rc; 4863 4864 if (!crq->msgs) 4865 return; 4866 4867 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4868 free_irq(vdev->irq, adapter); 4869 tasklet_kill(&adapter->tasklet); 4870 do { 4871 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4872 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4873 4874 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4875 DMA_BIDIRECTIONAL); 4876 free_page((unsigned long)crq->msgs); 4877 crq->msgs = NULL; 4878 crq->active = false; 4879 } 4880 4881 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4882 { 4883 struct ibmvnic_crq_queue *crq = &adapter->crq; 4884 struct device *dev = &adapter->vdev->dev; 4885 struct vio_dev *vdev = adapter->vdev; 4886 int rc, retrc = -ENOMEM; 4887 4888 if (crq->msgs) 4889 return 0; 4890 4891 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4892 /* Should we allocate more than one page? */ 4893 4894 if (!crq->msgs) 4895 return -ENOMEM; 4896 4897 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4898 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4899 DMA_BIDIRECTIONAL); 4900 if (dma_mapping_error(dev, crq->msg_token)) 4901 goto map_failed; 4902 4903 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4904 crq->msg_token, PAGE_SIZE); 4905 4906 if (rc == H_RESOURCE) 4907 /* maybe kexecing and resource is busy. try a reset */ 4908 rc = ibmvnic_reset_crq(adapter); 4909 retrc = rc; 4910 4911 if (rc == H_CLOSED) { 4912 dev_warn(dev, "Partner adapter not ready\n"); 4913 } else if (rc) { 4914 dev_warn(dev, "Error %d opening adapter\n", rc); 4915 goto reg_crq_failed; 4916 } 4917 4918 retrc = 0; 4919 4920 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4921 (unsigned long)adapter); 4922 4923 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4924 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 4925 adapter->vdev->unit_address); 4926 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 4927 if (rc) { 4928 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4929 vdev->irq, rc); 4930 goto req_irq_failed; 4931 } 4932 4933 rc = vio_enable_interrupts(vdev); 4934 if (rc) { 4935 dev_err(dev, "Error %d enabling interrupts\n", rc); 4936 goto req_irq_failed; 4937 } 4938 4939 crq->cur = 0; 4940 spin_lock_init(&crq->lock); 4941 4942 return retrc; 4943 4944 req_irq_failed: 4945 tasklet_kill(&adapter->tasklet); 4946 do { 4947 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4948 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4949 reg_crq_failed: 4950 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4951 map_failed: 4952 free_page((unsigned long)crq->msgs); 4953 crq->msgs = NULL; 4954 return retrc; 4955 } 4956 4957 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4958 { 4959 struct device *dev = &adapter->vdev->dev; 4960 unsigned long timeout = msecs_to_jiffies(30000); 4961 u64 old_num_rx_queues, old_num_tx_queues; 4962 int rc; 4963 4964 adapter->from_passive_init = false; 4965 4966 old_num_rx_queues = adapter->req_rx_queues; 4967 old_num_tx_queues = adapter->req_tx_queues; 4968 4969 reinit_completion(&adapter->init_done); 4970 adapter->init_done_rc = 0; 4971 ibmvnic_send_crq_init(adapter); 4972 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4973 dev_err(dev, "Initialization sequence timed out\n"); 4974 return -1; 4975 } 4976 4977 if (adapter->init_done_rc) { 4978 release_crq_queue(adapter); 4979 return adapter->init_done_rc; 4980 } 4981 4982 if (adapter->from_passive_init) { 4983 adapter->state = VNIC_OPEN; 4984 adapter->from_passive_init = false; 4985 return -1; 4986 } 4987 4988 if (test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 4989 adapter->reset_reason != VNIC_RESET_MOBILITY) { 4990 if (adapter->req_rx_queues != old_num_rx_queues || 4991 adapter->req_tx_queues != old_num_tx_queues) { 4992 release_sub_crqs(adapter, 0); 4993 rc = init_sub_crqs(adapter); 4994 } else { 4995 rc = reset_sub_crq_queues(adapter); 4996 } 4997 } else { 4998 rc = init_sub_crqs(adapter); 4999 } 5000 5001 if (rc) { 5002 dev_err(dev, "Initialization of sub crqs failed\n"); 5003 release_crq_queue(adapter); 5004 return rc; 5005 } 5006 5007 rc = init_sub_crq_irqs(adapter); 5008 if (rc) { 5009 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5010 release_crq_queue(adapter); 5011 } 5012 5013 return rc; 5014 } 5015 5016 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 5017 { 5018 struct device *dev = &adapter->vdev->dev; 5019 unsigned long timeout = msecs_to_jiffies(30000); 5020 int rc; 5021 5022 adapter->from_passive_init = false; 5023 5024 adapter->init_done_rc = 0; 5025 ibmvnic_send_crq_init(adapter); 5026 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5027 dev_err(dev, "Initialization sequence timed out\n"); 5028 return -1; 5029 } 5030 5031 if (adapter->init_done_rc) { 5032 release_crq_queue(adapter); 5033 return adapter->init_done_rc; 5034 } 5035 5036 if (adapter->from_passive_init) { 5037 adapter->state = VNIC_OPEN; 5038 adapter->from_passive_init = false; 5039 return -1; 5040 } 5041 5042 rc = init_sub_crqs(adapter); 5043 if (rc) { 5044 dev_err(dev, "Initialization of sub crqs failed\n"); 5045 release_crq_queue(adapter); 5046 return rc; 5047 } 5048 5049 rc = init_sub_crq_irqs(adapter); 5050 if (rc) { 5051 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5052 release_crq_queue(adapter); 5053 } 5054 5055 return rc; 5056 } 5057 5058 static struct device_attribute dev_attr_failover; 5059 5060 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5061 { 5062 struct ibmvnic_adapter *adapter; 5063 struct net_device *netdev; 5064 unsigned char *mac_addr_p; 5065 int rc; 5066 5067 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5068 dev->unit_address); 5069 5070 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5071 VETH_MAC_ADDR, NULL); 5072 if (!mac_addr_p) { 5073 dev_err(&dev->dev, 5074 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5075 __FILE__, __LINE__); 5076 return 0; 5077 } 5078 5079 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5080 IBMVNIC_MAX_QUEUES); 5081 if (!netdev) 5082 return -ENOMEM; 5083 5084 adapter = netdev_priv(netdev); 5085 adapter->state = VNIC_PROBING; 5086 dev_set_drvdata(&dev->dev, netdev); 5087 adapter->vdev = dev; 5088 adapter->netdev = netdev; 5089 5090 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5091 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5092 netdev->irq = dev->irq; 5093 netdev->netdev_ops = &ibmvnic_netdev_ops; 5094 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5095 SET_NETDEV_DEV(netdev, &dev->dev); 5096 5097 spin_lock_init(&adapter->stats_lock); 5098 5099 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5100 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5101 __ibmvnic_delayed_reset); 5102 INIT_LIST_HEAD(&adapter->rwi_list); 5103 spin_lock_init(&adapter->rwi_lock); 5104 spin_lock_init(&adapter->state_lock); 5105 mutex_init(&adapter->fw_lock); 5106 init_completion(&adapter->init_done); 5107 init_completion(&adapter->fw_done); 5108 init_completion(&adapter->reset_done); 5109 init_completion(&adapter->stats_done); 5110 clear_bit(0, &adapter->resetting); 5111 5112 do { 5113 rc = init_crq_queue(adapter); 5114 if (rc) { 5115 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5116 rc); 5117 goto ibmvnic_init_fail; 5118 } 5119 5120 rc = ibmvnic_init(adapter); 5121 if (rc && rc != EAGAIN) 5122 goto ibmvnic_init_fail; 5123 } while (rc == EAGAIN); 5124 5125 rc = init_stats_buffers(adapter); 5126 if (rc) 5127 goto ibmvnic_init_fail; 5128 5129 rc = init_stats_token(adapter); 5130 if (rc) 5131 goto ibmvnic_stats_fail; 5132 5133 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5134 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5135 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5136 5137 rc = device_create_file(&dev->dev, &dev_attr_failover); 5138 if (rc) 5139 goto ibmvnic_dev_file_err; 5140 5141 netif_carrier_off(netdev); 5142 rc = register_netdev(netdev); 5143 if (rc) { 5144 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5145 goto ibmvnic_register_fail; 5146 } 5147 dev_info(&dev->dev, "ibmvnic registered\n"); 5148 5149 adapter->state = VNIC_PROBED; 5150 5151 adapter->wait_for_reset = false; 5152 5153 return 0; 5154 5155 ibmvnic_register_fail: 5156 device_remove_file(&dev->dev, &dev_attr_failover); 5157 5158 ibmvnic_dev_file_err: 5159 release_stats_token(adapter); 5160 5161 ibmvnic_stats_fail: 5162 release_stats_buffers(adapter); 5163 5164 ibmvnic_init_fail: 5165 release_sub_crqs(adapter, 1); 5166 release_crq_queue(adapter); 5167 mutex_destroy(&adapter->fw_lock); 5168 free_netdev(netdev); 5169 5170 return rc; 5171 } 5172 5173 static int ibmvnic_remove(struct vio_dev *dev) 5174 { 5175 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5176 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5177 unsigned long flags; 5178 5179 spin_lock_irqsave(&adapter->state_lock, flags); 5180 if (adapter->state == VNIC_RESETTING) { 5181 spin_unlock_irqrestore(&adapter->state_lock, flags); 5182 return -EBUSY; 5183 } 5184 5185 adapter->state = VNIC_REMOVING; 5186 spin_unlock_irqrestore(&adapter->state_lock, flags); 5187 5188 rtnl_lock(); 5189 unregister_netdevice(netdev); 5190 5191 release_resources(adapter); 5192 release_sub_crqs(adapter, 1); 5193 release_crq_queue(adapter); 5194 5195 release_stats_token(adapter); 5196 release_stats_buffers(adapter); 5197 5198 adapter->state = VNIC_REMOVED; 5199 5200 rtnl_unlock(); 5201 mutex_destroy(&adapter->fw_lock); 5202 device_remove_file(&dev->dev, &dev_attr_failover); 5203 free_netdev(netdev); 5204 dev_set_drvdata(&dev->dev, NULL); 5205 5206 return 0; 5207 } 5208 5209 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5210 const char *buf, size_t count) 5211 { 5212 struct net_device *netdev = dev_get_drvdata(dev); 5213 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5214 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5215 __be64 session_token; 5216 long rc; 5217 5218 if (!sysfs_streq(buf, "1")) 5219 return -EINVAL; 5220 5221 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5222 H_GET_SESSION_TOKEN, 0, 0, 0); 5223 if (rc) { 5224 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5225 rc); 5226 return -EINVAL; 5227 } 5228 5229 session_token = (__be64)retbuf[0]; 5230 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5231 be64_to_cpu(session_token)); 5232 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5233 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5234 if (rc) { 5235 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5236 rc); 5237 return -EINVAL; 5238 } 5239 5240 return count; 5241 } 5242 5243 static DEVICE_ATTR_WO(failover); 5244 5245 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5246 { 5247 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5248 struct ibmvnic_adapter *adapter; 5249 struct iommu_table *tbl; 5250 unsigned long ret = 0; 5251 int i; 5252 5253 tbl = get_iommu_table_base(&vdev->dev); 5254 5255 /* netdev inits at probe time along with the structures we need below*/ 5256 if (!netdev) 5257 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5258 5259 adapter = netdev_priv(netdev); 5260 5261 ret += PAGE_SIZE; /* the crq message queue */ 5262 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5263 5264 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5265 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5266 5267 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5268 i++) 5269 ret += adapter->rx_pool[i].size * 5270 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5271 5272 return ret; 5273 } 5274 5275 static int ibmvnic_resume(struct device *dev) 5276 { 5277 struct net_device *netdev = dev_get_drvdata(dev); 5278 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5279 5280 if (adapter->state != VNIC_OPEN) 5281 return 0; 5282 5283 tasklet_schedule(&adapter->tasklet); 5284 5285 return 0; 5286 } 5287 5288 static const struct vio_device_id ibmvnic_device_table[] = { 5289 {"network", "IBM,vnic"}, 5290 {"", "" } 5291 }; 5292 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5293 5294 static const struct dev_pm_ops ibmvnic_pm_ops = { 5295 .resume = ibmvnic_resume 5296 }; 5297 5298 static struct vio_driver ibmvnic_driver = { 5299 .id_table = ibmvnic_device_table, 5300 .probe = ibmvnic_probe, 5301 .remove = ibmvnic_remove, 5302 .get_desired_dma = ibmvnic_get_desired_dma, 5303 .name = ibmvnic_driver_name, 5304 .pm = &ibmvnic_pm_ops, 5305 }; 5306 5307 /* module functions */ 5308 static int __init ibmvnic_module_init(void) 5309 { 5310 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5311 IBMVNIC_DRIVER_VERSION); 5312 5313 return vio_register_driver(&ibmvnic_driver); 5314 } 5315 5316 static void __exit ibmvnic_module_exit(void) 5317 { 5318 vio_unregister_driver(&ibmvnic_driver); 5319 } 5320 5321 module_init(ibmvnic_module_init); 5322 module_exit(ibmvnic_module_exit); 5323