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