1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/kthread.h> 57 #include <linux/seq_file.h> 58 #include <linux/interrupt.h> 59 #include <net/net_namespace.h> 60 #include <asm/hvcall.h> 61 #include <linux/atomic.h> 62 #include <asm/vio.h> 63 #include <asm/iommu.h> 64 #include <linux/uaccess.h> 65 #include <asm/firmware.h> 66 #include <linux/workqueue.h> 67 #include <linux/if_vlan.h> 68 #include <linux/utsname.h> 69 70 #include "ibmvnic.h" 71 72 static const char ibmvnic_driver_name[] = "ibmvnic"; 73 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 74 75 MODULE_AUTHOR("Santiago Leon"); 76 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 77 MODULE_LICENSE("GPL"); 78 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 79 80 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 81 static int ibmvnic_remove(struct vio_dev *); 82 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 83 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 84 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 85 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 86 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 87 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 88 union sub_crq *sub_crq); 89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 91 static int enable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int disable_scrq_irq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static int pending_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 98 struct ibmvnic_sub_crq_queue *); 99 static int ibmvnic_poll(struct napi_struct *napi, int data); 100 static void send_map_query(struct ibmvnic_adapter *adapter); 101 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 102 static int send_request_unmap(struct ibmvnic_adapter *, u8); 103 static int send_login(struct ibmvnic_adapter *adapter); 104 static void send_cap_queries(struct ibmvnic_adapter *adapter); 105 static int init_sub_crqs(struct ibmvnic_adapter *); 106 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 107 static int ibmvnic_init(struct ibmvnic_adapter *); 108 static int ibmvnic_reset_init(struct ibmvnic_adapter *); 109 static void release_crq_queue(struct ibmvnic_adapter *); 110 static int __ibmvnic_set_mac(struct net_device *, u8 *); 111 static int init_crq_queue(struct ibmvnic_adapter *adapter); 112 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 113 114 struct ibmvnic_stat { 115 char name[ETH_GSTRING_LEN]; 116 int offset; 117 }; 118 119 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 120 offsetof(struct ibmvnic_statistics, stat)) 121 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 122 123 static const struct ibmvnic_stat ibmvnic_stats[] = { 124 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 125 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 126 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 127 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 128 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 129 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 130 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 131 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 132 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 133 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 134 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 135 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 136 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 137 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 138 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 139 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 140 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 141 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 142 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 143 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 144 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 145 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 146 }; 147 148 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 149 unsigned long length, unsigned long *number, 150 unsigned long *irq) 151 { 152 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 153 long rc; 154 155 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 156 *number = retbuf[0]; 157 *irq = retbuf[1]; 158 159 return rc; 160 } 161 162 /** 163 * ibmvnic_wait_for_completion - Check device state and wait for completion 164 * @adapter: private device data 165 * @comp_done: completion structure to wait for 166 * @timeout: time to wait in milliseconds 167 * 168 * Wait for a completion signal or until the timeout limit is reached 169 * while checking that the device is still active. 170 */ 171 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 172 struct completion *comp_done, 173 unsigned long timeout) 174 { 175 struct net_device *netdev; 176 unsigned long div_timeout; 177 u8 retry; 178 179 netdev = adapter->netdev; 180 retry = 5; 181 div_timeout = msecs_to_jiffies(timeout / retry); 182 while (true) { 183 if (!adapter->crq.active) { 184 netdev_err(netdev, "Device down!\n"); 185 return -ENODEV; 186 } 187 if (!retry--) 188 break; 189 if (wait_for_completion_timeout(comp_done, div_timeout)) 190 return 0; 191 } 192 netdev_err(netdev, "Operation timed out.\n"); 193 return -ETIMEDOUT; 194 } 195 196 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 197 struct ibmvnic_long_term_buff *ltb, int size) 198 { 199 struct device *dev = &adapter->vdev->dev; 200 int rc; 201 202 ltb->size = size; 203 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 204 GFP_KERNEL); 205 206 if (!ltb->buff) { 207 dev_err(dev, "Couldn't alloc long term buffer\n"); 208 return -ENOMEM; 209 } 210 ltb->map_id = adapter->map_id; 211 adapter->map_id++; 212 213 mutex_lock(&adapter->fw_lock); 214 adapter->fw_done_rc = 0; 215 reinit_completion(&adapter->fw_done); 216 rc = send_request_map(adapter, ltb->addr, 217 ltb->size, ltb->map_id); 218 if (rc) { 219 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 220 mutex_unlock(&adapter->fw_lock); 221 return rc; 222 } 223 224 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 225 if (rc) { 226 dev_err(dev, 227 "Long term map request aborted or timed out,rc = %d\n", 228 rc); 229 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 230 mutex_unlock(&adapter->fw_lock); 231 return rc; 232 } 233 234 if (adapter->fw_done_rc) { 235 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 236 adapter->fw_done_rc); 237 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 238 mutex_unlock(&adapter->fw_lock); 239 return -1; 240 } 241 mutex_unlock(&adapter->fw_lock); 242 return 0; 243 } 244 245 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 246 struct ibmvnic_long_term_buff *ltb) 247 { 248 struct device *dev = &adapter->vdev->dev; 249 250 if (!ltb->buff) 251 return; 252 253 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 254 adapter->reset_reason != VNIC_RESET_MOBILITY) 255 send_request_unmap(adapter, ltb->map_id); 256 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 257 } 258 259 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 260 struct ibmvnic_long_term_buff *ltb) 261 { 262 struct device *dev = &adapter->vdev->dev; 263 int rc; 264 265 memset(ltb->buff, 0, ltb->size); 266 267 mutex_lock(&adapter->fw_lock); 268 adapter->fw_done_rc = 0; 269 270 reinit_completion(&adapter->fw_done); 271 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 272 if (rc) { 273 mutex_unlock(&adapter->fw_lock); 274 return rc; 275 } 276 277 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 278 if (rc) { 279 dev_info(dev, 280 "Reset failed, long term map request timed out or aborted\n"); 281 mutex_unlock(&adapter->fw_lock); 282 return rc; 283 } 284 285 if (adapter->fw_done_rc) { 286 dev_info(dev, 287 "Reset failed, attempting to free and reallocate buffer\n"); 288 free_long_term_buff(adapter, ltb); 289 mutex_unlock(&adapter->fw_lock); 290 return alloc_long_term_buff(adapter, ltb, ltb->size); 291 } 292 mutex_unlock(&adapter->fw_lock); 293 return 0; 294 } 295 296 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 297 { 298 int i; 299 300 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 301 i++) 302 adapter->rx_pool[i].active = 0; 303 } 304 305 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 306 struct ibmvnic_rx_pool *pool) 307 { 308 int count = pool->size - atomic_read(&pool->available); 309 struct device *dev = &adapter->vdev->dev; 310 int buffers_added = 0; 311 unsigned long lpar_rc; 312 union sub_crq sub_crq; 313 struct sk_buff *skb; 314 unsigned int offset; 315 dma_addr_t dma_addr; 316 unsigned char *dst; 317 u64 *handle_array; 318 int shift = 0; 319 int index; 320 int i; 321 322 if (!pool->active) 323 return; 324 325 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 326 be32_to_cpu(adapter->login_rsp_buf-> 327 off_rxadd_subcrqs)); 328 329 for (i = 0; i < count; ++i) { 330 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 331 if (!skb) { 332 dev_err(dev, "Couldn't replenish rx buff\n"); 333 adapter->replenish_no_mem++; 334 break; 335 } 336 337 index = pool->free_map[pool->next_free]; 338 339 if (pool->rx_buff[index].skb) 340 dev_err(dev, "Inconsistent free_map!\n"); 341 342 /* Copy the skb to the long term mapped DMA buffer */ 343 offset = index * pool->buff_size; 344 dst = pool->long_term_buff.buff + offset; 345 memset(dst, 0, pool->buff_size); 346 dma_addr = pool->long_term_buff.addr + offset; 347 pool->rx_buff[index].data = dst; 348 349 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 350 pool->rx_buff[index].dma = dma_addr; 351 pool->rx_buff[index].skb = skb; 352 pool->rx_buff[index].pool_index = pool->index; 353 pool->rx_buff[index].size = pool->buff_size; 354 355 memset(&sub_crq, 0, sizeof(sub_crq)); 356 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 357 sub_crq.rx_add.correlator = 358 cpu_to_be64((u64)&pool->rx_buff[index]); 359 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 360 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 361 362 /* The length field of the sCRQ is defined to be 24 bits so the 363 * buffer size needs to be left shifted by a byte before it is 364 * converted to big endian to prevent the last byte from being 365 * truncated. 366 */ 367 #ifdef __LITTLE_ENDIAN__ 368 shift = 8; 369 #endif 370 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 371 372 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 373 &sub_crq); 374 if (lpar_rc != H_SUCCESS) 375 goto failure; 376 377 buffers_added++; 378 adapter->replenish_add_buff_success++; 379 pool->next_free = (pool->next_free + 1) % pool->size; 380 } 381 atomic_add(buffers_added, &pool->available); 382 return; 383 384 failure: 385 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 386 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 387 pool->free_map[pool->next_free] = index; 388 pool->rx_buff[index].skb = NULL; 389 390 dev_kfree_skb_any(skb); 391 adapter->replenish_add_buff_failure++; 392 atomic_add(buffers_added, &pool->available); 393 394 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 395 /* Disable buffer pool replenishment and report carrier off if 396 * queue is closed or pending failover. 397 * Firmware guarantees that a signal will be sent to the 398 * driver, triggering a reset. 399 */ 400 deactivate_rx_pools(adapter); 401 netif_carrier_off(adapter->netdev); 402 } 403 } 404 405 static void replenish_pools(struct ibmvnic_adapter *adapter) 406 { 407 int i; 408 409 adapter->replenish_task_cycles++; 410 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 411 i++) { 412 if (adapter->rx_pool[i].active) 413 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 414 } 415 } 416 417 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 418 { 419 kfree(adapter->tx_stats_buffers); 420 kfree(adapter->rx_stats_buffers); 421 adapter->tx_stats_buffers = NULL; 422 adapter->rx_stats_buffers = NULL; 423 } 424 425 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 426 { 427 adapter->tx_stats_buffers = 428 kcalloc(IBMVNIC_MAX_QUEUES, 429 sizeof(struct ibmvnic_tx_queue_stats), 430 GFP_KERNEL); 431 if (!adapter->tx_stats_buffers) 432 return -ENOMEM; 433 434 adapter->rx_stats_buffers = 435 kcalloc(IBMVNIC_MAX_QUEUES, 436 sizeof(struct ibmvnic_rx_queue_stats), 437 GFP_KERNEL); 438 if (!adapter->rx_stats_buffers) 439 return -ENOMEM; 440 441 return 0; 442 } 443 444 static void release_stats_token(struct ibmvnic_adapter *adapter) 445 { 446 struct device *dev = &adapter->vdev->dev; 447 448 if (!adapter->stats_token) 449 return; 450 451 dma_unmap_single(dev, adapter->stats_token, 452 sizeof(struct ibmvnic_statistics), 453 DMA_FROM_DEVICE); 454 adapter->stats_token = 0; 455 } 456 457 static int init_stats_token(struct ibmvnic_adapter *adapter) 458 { 459 struct device *dev = &adapter->vdev->dev; 460 dma_addr_t stok; 461 462 stok = dma_map_single(dev, &adapter->stats, 463 sizeof(struct ibmvnic_statistics), 464 DMA_FROM_DEVICE); 465 if (dma_mapping_error(dev, stok)) { 466 dev_err(dev, "Couldn't map stats buffer\n"); 467 return -1; 468 } 469 470 adapter->stats_token = stok; 471 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 472 return 0; 473 } 474 475 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 476 { 477 struct ibmvnic_rx_pool *rx_pool; 478 int rx_scrqs; 479 int i, j, rc; 480 u64 *size_array; 481 482 if (!adapter->rx_pool) 483 return -1; 484 485 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 486 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 487 488 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 489 for (i = 0; i < rx_scrqs; i++) { 490 rx_pool = &adapter->rx_pool[i]; 491 492 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 493 494 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) { 495 free_long_term_buff(adapter, &rx_pool->long_term_buff); 496 rx_pool->buff_size = be64_to_cpu(size_array[i]); 497 rc = alloc_long_term_buff(adapter, 498 &rx_pool->long_term_buff, 499 rx_pool->size * 500 rx_pool->buff_size); 501 } else { 502 rc = reset_long_term_buff(adapter, 503 &rx_pool->long_term_buff); 504 } 505 506 if (rc) 507 return rc; 508 509 for (j = 0; j < rx_pool->size; j++) 510 rx_pool->free_map[j] = j; 511 512 memset(rx_pool->rx_buff, 0, 513 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 514 515 atomic_set(&rx_pool->available, 0); 516 rx_pool->next_alloc = 0; 517 rx_pool->next_free = 0; 518 rx_pool->active = 1; 519 } 520 521 return 0; 522 } 523 524 static void release_rx_pools(struct ibmvnic_adapter *adapter) 525 { 526 struct ibmvnic_rx_pool *rx_pool; 527 int i, j; 528 529 if (!adapter->rx_pool) 530 return; 531 532 for (i = 0; i < adapter->num_active_rx_pools; i++) { 533 rx_pool = &adapter->rx_pool[i]; 534 535 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 536 537 kfree(rx_pool->free_map); 538 free_long_term_buff(adapter, &rx_pool->long_term_buff); 539 540 if (!rx_pool->rx_buff) 541 continue; 542 543 for (j = 0; j < rx_pool->size; j++) { 544 if (rx_pool->rx_buff[j].skb) { 545 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 546 rx_pool->rx_buff[j].skb = NULL; 547 } 548 } 549 550 kfree(rx_pool->rx_buff); 551 } 552 553 kfree(adapter->rx_pool); 554 adapter->rx_pool = NULL; 555 adapter->num_active_rx_pools = 0; 556 } 557 558 static int init_rx_pools(struct net_device *netdev) 559 { 560 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 561 struct device *dev = &adapter->vdev->dev; 562 struct ibmvnic_rx_pool *rx_pool; 563 int rxadd_subcrqs; 564 u64 *size_array; 565 int i, j; 566 567 rxadd_subcrqs = 568 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 569 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 570 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 571 572 adapter->rx_pool = kcalloc(rxadd_subcrqs, 573 sizeof(struct ibmvnic_rx_pool), 574 GFP_KERNEL); 575 if (!adapter->rx_pool) { 576 dev_err(dev, "Failed to allocate rx pools\n"); 577 return -1; 578 } 579 580 adapter->num_active_rx_pools = rxadd_subcrqs; 581 582 for (i = 0; i < rxadd_subcrqs; i++) { 583 rx_pool = &adapter->rx_pool[i]; 584 585 netdev_dbg(adapter->netdev, 586 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 587 i, adapter->req_rx_add_entries_per_subcrq, 588 be64_to_cpu(size_array[i])); 589 590 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 591 rx_pool->index = i; 592 rx_pool->buff_size = be64_to_cpu(size_array[i]); 593 rx_pool->active = 1; 594 595 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 596 GFP_KERNEL); 597 if (!rx_pool->free_map) { 598 release_rx_pools(adapter); 599 return -1; 600 } 601 602 rx_pool->rx_buff = kcalloc(rx_pool->size, 603 sizeof(struct ibmvnic_rx_buff), 604 GFP_KERNEL); 605 if (!rx_pool->rx_buff) { 606 dev_err(dev, "Couldn't alloc rx buffers\n"); 607 release_rx_pools(adapter); 608 return -1; 609 } 610 611 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 612 rx_pool->size * rx_pool->buff_size)) { 613 release_rx_pools(adapter); 614 return -1; 615 } 616 617 for (j = 0; j < rx_pool->size; ++j) 618 rx_pool->free_map[j] = j; 619 620 atomic_set(&rx_pool->available, 0); 621 rx_pool->next_alloc = 0; 622 rx_pool->next_free = 0; 623 } 624 625 return 0; 626 } 627 628 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 629 struct ibmvnic_tx_pool *tx_pool) 630 { 631 int rc, i; 632 633 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 634 if (rc) 635 return rc; 636 637 memset(tx_pool->tx_buff, 0, 638 tx_pool->num_buffers * 639 sizeof(struct ibmvnic_tx_buff)); 640 641 for (i = 0; i < tx_pool->num_buffers; i++) 642 tx_pool->free_map[i] = i; 643 644 tx_pool->consumer_index = 0; 645 tx_pool->producer_index = 0; 646 647 return 0; 648 } 649 650 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 651 { 652 int tx_scrqs; 653 int i, rc; 654 655 if (!adapter->tx_pool) 656 return -1; 657 658 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 659 for (i = 0; i < tx_scrqs; i++) { 660 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 661 if (rc) 662 return rc; 663 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 664 if (rc) 665 return rc; 666 } 667 668 return 0; 669 } 670 671 static void release_vpd_data(struct ibmvnic_adapter *adapter) 672 { 673 if (!adapter->vpd) 674 return; 675 676 kfree(adapter->vpd->buff); 677 kfree(adapter->vpd); 678 679 adapter->vpd = NULL; 680 } 681 682 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 683 struct ibmvnic_tx_pool *tx_pool) 684 { 685 kfree(tx_pool->tx_buff); 686 kfree(tx_pool->free_map); 687 free_long_term_buff(adapter, &tx_pool->long_term_buff); 688 } 689 690 static void release_tx_pools(struct ibmvnic_adapter *adapter) 691 { 692 int i; 693 694 if (!adapter->tx_pool) 695 return; 696 697 for (i = 0; i < adapter->num_active_tx_pools; i++) { 698 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 699 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 700 } 701 702 kfree(adapter->tx_pool); 703 adapter->tx_pool = NULL; 704 kfree(adapter->tso_pool); 705 adapter->tso_pool = NULL; 706 adapter->num_active_tx_pools = 0; 707 } 708 709 static int init_one_tx_pool(struct net_device *netdev, 710 struct ibmvnic_tx_pool *tx_pool, 711 int num_entries, int buf_size) 712 { 713 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 714 int i; 715 716 tx_pool->tx_buff = kcalloc(num_entries, 717 sizeof(struct ibmvnic_tx_buff), 718 GFP_KERNEL); 719 if (!tx_pool->tx_buff) 720 return -1; 721 722 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 723 num_entries * buf_size)) 724 return -1; 725 726 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 727 if (!tx_pool->free_map) 728 return -1; 729 730 for (i = 0; i < num_entries; i++) 731 tx_pool->free_map[i] = i; 732 733 tx_pool->consumer_index = 0; 734 tx_pool->producer_index = 0; 735 tx_pool->num_buffers = num_entries; 736 tx_pool->buf_size = buf_size; 737 738 return 0; 739 } 740 741 static int init_tx_pools(struct net_device *netdev) 742 { 743 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 744 int tx_subcrqs; 745 int i, rc; 746 747 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 748 adapter->tx_pool = kcalloc(tx_subcrqs, 749 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 750 if (!adapter->tx_pool) 751 return -1; 752 753 adapter->tso_pool = kcalloc(tx_subcrqs, 754 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 755 if (!adapter->tso_pool) 756 return -1; 757 758 adapter->num_active_tx_pools = tx_subcrqs; 759 760 for (i = 0; i < tx_subcrqs; i++) { 761 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 762 adapter->req_tx_entries_per_subcrq, 763 adapter->req_mtu + VLAN_HLEN); 764 if (rc) { 765 release_tx_pools(adapter); 766 return rc; 767 } 768 769 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 770 IBMVNIC_TSO_BUFS, 771 IBMVNIC_TSO_BUF_SZ); 772 if (rc) { 773 release_tx_pools(adapter); 774 return rc; 775 } 776 } 777 778 return 0; 779 } 780 781 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 782 { 783 int i; 784 785 if (adapter->napi_enabled) 786 return; 787 788 for (i = 0; i < adapter->req_rx_queues; i++) 789 napi_enable(&adapter->napi[i]); 790 791 adapter->napi_enabled = true; 792 } 793 794 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 795 { 796 int i; 797 798 if (!adapter->napi_enabled) 799 return; 800 801 for (i = 0; i < adapter->req_rx_queues; i++) { 802 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 803 napi_disable(&adapter->napi[i]); 804 } 805 806 adapter->napi_enabled = false; 807 } 808 809 static int init_napi(struct ibmvnic_adapter *adapter) 810 { 811 int i; 812 813 adapter->napi = kcalloc(adapter->req_rx_queues, 814 sizeof(struct napi_struct), GFP_KERNEL); 815 if (!adapter->napi) 816 return -ENOMEM; 817 818 for (i = 0; i < adapter->req_rx_queues; i++) { 819 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 820 netif_napi_add(adapter->netdev, &adapter->napi[i], 821 ibmvnic_poll, NAPI_POLL_WEIGHT); 822 } 823 824 adapter->num_active_rx_napi = adapter->req_rx_queues; 825 return 0; 826 } 827 828 static void release_napi(struct ibmvnic_adapter *adapter) 829 { 830 int i; 831 832 if (!adapter->napi) 833 return; 834 835 for (i = 0; i < adapter->num_active_rx_napi; i++) { 836 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 837 netif_napi_del(&adapter->napi[i]); 838 } 839 840 kfree(adapter->napi); 841 adapter->napi = NULL; 842 adapter->num_active_rx_napi = 0; 843 adapter->napi_enabled = false; 844 } 845 846 static int ibmvnic_login(struct net_device *netdev) 847 { 848 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 849 unsigned long timeout = msecs_to_jiffies(30000); 850 int retry_count = 0; 851 int retries = 10; 852 bool retry; 853 int rc; 854 855 do { 856 retry = false; 857 if (retry_count > retries) { 858 netdev_warn(netdev, "Login attempts exceeded\n"); 859 return -1; 860 } 861 862 adapter->init_done_rc = 0; 863 reinit_completion(&adapter->init_done); 864 rc = send_login(adapter); 865 if (rc) { 866 netdev_warn(netdev, "Unable to login\n"); 867 return rc; 868 } 869 870 if (!wait_for_completion_timeout(&adapter->init_done, 871 timeout)) { 872 netdev_warn(netdev, "Login timed out, retrying...\n"); 873 retry = true; 874 adapter->init_done_rc = 0; 875 retry_count++; 876 continue; 877 } 878 879 if (adapter->init_done_rc == ABORTED) { 880 netdev_warn(netdev, "Login aborted, retrying...\n"); 881 retry = true; 882 adapter->init_done_rc = 0; 883 retry_count++; 884 /* FW or device may be busy, so 885 * wait a bit before retrying login 886 */ 887 msleep(500); 888 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 889 retry_count++; 890 release_sub_crqs(adapter, 1); 891 892 retry = true; 893 netdev_dbg(netdev, 894 "Received partial success, retrying...\n"); 895 adapter->init_done_rc = 0; 896 reinit_completion(&adapter->init_done); 897 send_cap_queries(adapter); 898 if (!wait_for_completion_timeout(&adapter->init_done, 899 timeout)) { 900 netdev_warn(netdev, 901 "Capabilities query timed out\n"); 902 return -1; 903 } 904 905 rc = init_sub_crqs(adapter); 906 if (rc) { 907 netdev_warn(netdev, 908 "SCRQ initialization failed\n"); 909 return -1; 910 } 911 912 rc = init_sub_crq_irqs(adapter); 913 if (rc) { 914 netdev_warn(netdev, 915 "SCRQ irq initialization failed\n"); 916 return -1; 917 } 918 } else if (adapter->init_done_rc) { 919 netdev_warn(netdev, "Adapter login failed\n"); 920 return -1; 921 } 922 } while (retry); 923 924 __ibmvnic_set_mac(netdev, adapter->mac_addr); 925 926 return 0; 927 } 928 929 static void release_login_buffer(struct ibmvnic_adapter *adapter) 930 { 931 kfree(adapter->login_buf); 932 adapter->login_buf = NULL; 933 } 934 935 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 936 { 937 kfree(adapter->login_rsp_buf); 938 adapter->login_rsp_buf = NULL; 939 } 940 941 static void release_resources(struct ibmvnic_adapter *adapter) 942 { 943 release_vpd_data(adapter); 944 945 release_tx_pools(adapter); 946 release_rx_pools(adapter); 947 948 release_napi(adapter); 949 release_login_rsp_buffer(adapter); 950 } 951 952 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 953 { 954 struct net_device *netdev = adapter->netdev; 955 unsigned long timeout = msecs_to_jiffies(30000); 956 union ibmvnic_crq crq; 957 bool resend; 958 int rc; 959 960 netdev_dbg(netdev, "setting link state %d\n", link_state); 961 962 memset(&crq, 0, sizeof(crq)); 963 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 964 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 965 crq.logical_link_state.link_state = link_state; 966 967 do { 968 resend = false; 969 970 reinit_completion(&adapter->init_done); 971 rc = ibmvnic_send_crq(adapter, &crq); 972 if (rc) { 973 netdev_err(netdev, "Failed to set link state\n"); 974 return rc; 975 } 976 977 if (!wait_for_completion_timeout(&adapter->init_done, 978 timeout)) { 979 netdev_err(netdev, "timeout setting link state\n"); 980 return -1; 981 } 982 983 if (adapter->init_done_rc == 1) { 984 /* Partuial success, delay and re-send */ 985 mdelay(1000); 986 resend = true; 987 } else if (adapter->init_done_rc) { 988 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 989 adapter->init_done_rc); 990 return adapter->init_done_rc; 991 } 992 } while (resend); 993 994 return 0; 995 } 996 997 static int set_real_num_queues(struct net_device *netdev) 998 { 999 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1000 int rc; 1001 1002 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1003 adapter->req_tx_queues, adapter->req_rx_queues); 1004 1005 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1006 if (rc) { 1007 netdev_err(netdev, "failed to set the number of tx queues\n"); 1008 return rc; 1009 } 1010 1011 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1012 if (rc) 1013 netdev_err(netdev, "failed to set the number of rx queues\n"); 1014 1015 return rc; 1016 } 1017 1018 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1019 { 1020 struct device *dev = &adapter->vdev->dev; 1021 union ibmvnic_crq crq; 1022 int len = 0; 1023 int rc; 1024 1025 if (adapter->vpd->buff) 1026 len = adapter->vpd->len; 1027 1028 mutex_lock(&adapter->fw_lock); 1029 adapter->fw_done_rc = 0; 1030 reinit_completion(&adapter->fw_done); 1031 1032 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1033 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1034 rc = ibmvnic_send_crq(adapter, &crq); 1035 if (rc) { 1036 mutex_unlock(&adapter->fw_lock); 1037 return rc; 1038 } 1039 1040 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1041 if (rc) { 1042 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1043 mutex_unlock(&adapter->fw_lock); 1044 return rc; 1045 } 1046 mutex_unlock(&adapter->fw_lock); 1047 1048 if (!adapter->vpd->len) 1049 return -ENODATA; 1050 1051 if (!adapter->vpd->buff) 1052 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1053 else if (adapter->vpd->len != len) 1054 adapter->vpd->buff = 1055 krealloc(adapter->vpd->buff, 1056 adapter->vpd->len, GFP_KERNEL); 1057 1058 if (!adapter->vpd->buff) { 1059 dev_err(dev, "Could allocate VPD buffer\n"); 1060 return -ENOMEM; 1061 } 1062 1063 adapter->vpd->dma_addr = 1064 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1065 DMA_FROM_DEVICE); 1066 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1067 dev_err(dev, "Could not map VPD buffer\n"); 1068 kfree(adapter->vpd->buff); 1069 adapter->vpd->buff = NULL; 1070 return -ENOMEM; 1071 } 1072 1073 mutex_lock(&adapter->fw_lock); 1074 adapter->fw_done_rc = 0; 1075 reinit_completion(&adapter->fw_done); 1076 1077 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1078 crq.get_vpd.cmd = GET_VPD; 1079 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1080 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1081 rc = ibmvnic_send_crq(adapter, &crq); 1082 if (rc) { 1083 kfree(adapter->vpd->buff); 1084 adapter->vpd->buff = NULL; 1085 mutex_unlock(&adapter->fw_lock); 1086 return rc; 1087 } 1088 1089 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1090 if (rc) { 1091 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1092 kfree(adapter->vpd->buff); 1093 adapter->vpd->buff = NULL; 1094 mutex_unlock(&adapter->fw_lock); 1095 return rc; 1096 } 1097 1098 mutex_unlock(&adapter->fw_lock); 1099 return 0; 1100 } 1101 1102 static int init_resources(struct ibmvnic_adapter *adapter) 1103 { 1104 struct net_device *netdev = adapter->netdev; 1105 int rc; 1106 1107 rc = set_real_num_queues(netdev); 1108 if (rc) 1109 return rc; 1110 1111 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1112 if (!adapter->vpd) 1113 return -ENOMEM; 1114 1115 /* Vital Product Data (VPD) */ 1116 rc = ibmvnic_get_vpd(adapter); 1117 if (rc) { 1118 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1119 return rc; 1120 } 1121 1122 adapter->map_id = 1; 1123 1124 rc = init_napi(adapter); 1125 if (rc) 1126 return rc; 1127 1128 send_map_query(adapter); 1129 1130 rc = init_rx_pools(netdev); 1131 if (rc) 1132 return rc; 1133 1134 rc = init_tx_pools(netdev); 1135 return rc; 1136 } 1137 1138 static int __ibmvnic_open(struct net_device *netdev) 1139 { 1140 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1141 enum vnic_state prev_state = adapter->state; 1142 int i, rc; 1143 1144 adapter->state = VNIC_OPENING; 1145 replenish_pools(adapter); 1146 ibmvnic_napi_enable(adapter); 1147 1148 /* We're ready to receive frames, enable the sub-crq interrupts and 1149 * set the logical link state to up 1150 */ 1151 for (i = 0; i < adapter->req_rx_queues; i++) { 1152 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1153 if (prev_state == VNIC_CLOSED) 1154 enable_irq(adapter->rx_scrq[i]->irq); 1155 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1156 } 1157 1158 for (i = 0; i < adapter->req_tx_queues; i++) { 1159 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1160 if (prev_state == VNIC_CLOSED) 1161 enable_irq(adapter->tx_scrq[i]->irq); 1162 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1163 } 1164 1165 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1166 if (rc) { 1167 for (i = 0; i < adapter->req_rx_queues; i++) 1168 napi_disable(&adapter->napi[i]); 1169 release_resources(adapter); 1170 return rc; 1171 } 1172 1173 netif_tx_start_all_queues(netdev); 1174 1175 if (prev_state == VNIC_CLOSED) { 1176 for (i = 0; i < adapter->req_rx_queues; i++) 1177 napi_schedule(&adapter->napi[i]); 1178 } 1179 1180 adapter->state = VNIC_OPEN; 1181 return rc; 1182 } 1183 1184 static int ibmvnic_open(struct net_device *netdev) 1185 { 1186 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1187 int rc; 1188 1189 /* If device failover is pending, just set device state and return. 1190 * Device operation will be handled by reset routine. 1191 */ 1192 if (adapter->failover_pending) { 1193 adapter->state = VNIC_OPEN; 1194 return 0; 1195 } 1196 1197 if (adapter->state != VNIC_CLOSED) { 1198 rc = ibmvnic_login(netdev); 1199 if (rc) 1200 return rc; 1201 1202 rc = init_resources(adapter); 1203 if (rc) { 1204 netdev_err(netdev, "failed to initialize resources\n"); 1205 release_resources(adapter); 1206 return rc; 1207 } 1208 } 1209 1210 rc = __ibmvnic_open(netdev); 1211 1212 return rc; 1213 } 1214 1215 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1216 { 1217 struct ibmvnic_rx_pool *rx_pool; 1218 struct ibmvnic_rx_buff *rx_buff; 1219 u64 rx_entries; 1220 int rx_scrqs; 1221 int i, j; 1222 1223 if (!adapter->rx_pool) 1224 return; 1225 1226 rx_scrqs = adapter->num_active_rx_pools; 1227 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1228 1229 /* Free any remaining skbs in the rx buffer pools */ 1230 for (i = 0; i < rx_scrqs; i++) { 1231 rx_pool = &adapter->rx_pool[i]; 1232 if (!rx_pool || !rx_pool->rx_buff) 1233 continue; 1234 1235 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1236 for (j = 0; j < rx_entries; j++) { 1237 rx_buff = &rx_pool->rx_buff[j]; 1238 if (rx_buff && rx_buff->skb) { 1239 dev_kfree_skb_any(rx_buff->skb); 1240 rx_buff->skb = NULL; 1241 } 1242 } 1243 } 1244 } 1245 1246 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1247 struct ibmvnic_tx_pool *tx_pool) 1248 { 1249 struct ibmvnic_tx_buff *tx_buff; 1250 u64 tx_entries; 1251 int i; 1252 1253 if (!tx_pool || !tx_pool->tx_buff) 1254 return; 1255 1256 tx_entries = tx_pool->num_buffers; 1257 1258 for (i = 0; i < tx_entries; i++) { 1259 tx_buff = &tx_pool->tx_buff[i]; 1260 if (tx_buff && tx_buff->skb) { 1261 dev_kfree_skb_any(tx_buff->skb); 1262 tx_buff->skb = NULL; 1263 } 1264 } 1265 } 1266 1267 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1268 { 1269 int tx_scrqs; 1270 int i; 1271 1272 if (!adapter->tx_pool || !adapter->tso_pool) 1273 return; 1274 1275 tx_scrqs = adapter->num_active_tx_pools; 1276 1277 /* Free any remaining skbs in the tx buffer pools */ 1278 for (i = 0; i < tx_scrqs; i++) { 1279 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1280 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1281 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1282 } 1283 } 1284 1285 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1286 { 1287 struct net_device *netdev = adapter->netdev; 1288 int i; 1289 1290 if (adapter->tx_scrq) { 1291 for (i = 0; i < adapter->req_tx_queues; i++) 1292 if (adapter->tx_scrq[i]->irq) { 1293 netdev_dbg(netdev, 1294 "Disabling tx_scrq[%d] irq\n", i); 1295 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1296 disable_irq(adapter->tx_scrq[i]->irq); 1297 } 1298 } 1299 1300 if (adapter->rx_scrq) { 1301 for (i = 0; i < adapter->req_rx_queues; i++) { 1302 if (adapter->rx_scrq[i]->irq) { 1303 netdev_dbg(netdev, 1304 "Disabling rx_scrq[%d] irq\n", i); 1305 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1306 disable_irq(adapter->rx_scrq[i]->irq); 1307 } 1308 } 1309 } 1310 } 1311 1312 static void ibmvnic_cleanup(struct net_device *netdev) 1313 { 1314 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1315 1316 /* ensure that transmissions are stopped if called by do_reset */ 1317 if (test_bit(0, &adapter->resetting)) 1318 netif_tx_disable(netdev); 1319 else 1320 netif_tx_stop_all_queues(netdev); 1321 1322 ibmvnic_napi_disable(adapter); 1323 ibmvnic_disable_irqs(adapter); 1324 1325 clean_rx_pools(adapter); 1326 clean_tx_pools(adapter); 1327 } 1328 1329 static int __ibmvnic_close(struct net_device *netdev) 1330 { 1331 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1332 int rc = 0; 1333 1334 adapter->state = VNIC_CLOSING; 1335 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1336 if (rc) 1337 return rc; 1338 adapter->state = VNIC_CLOSED; 1339 return 0; 1340 } 1341 1342 static int ibmvnic_close(struct net_device *netdev) 1343 { 1344 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1345 int rc; 1346 1347 /* If device failover is pending, just set device state and return. 1348 * Device operation will be handled by reset routine. 1349 */ 1350 if (adapter->failover_pending) { 1351 adapter->state = VNIC_CLOSED; 1352 return 0; 1353 } 1354 1355 rc = __ibmvnic_close(netdev); 1356 ibmvnic_cleanup(netdev); 1357 1358 return rc; 1359 } 1360 1361 /** 1362 * build_hdr_data - creates L2/L3/L4 header data buffer 1363 * @hdr_field - bitfield determining needed headers 1364 * @skb - socket buffer 1365 * @hdr_len - array of header lengths 1366 * @tot_len - total length of data 1367 * 1368 * Reads hdr_field to determine which headers are needed by firmware. 1369 * Builds a buffer containing these headers. Saves individual header 1370 * lengths and total buffer length to be used to build descriptors. 1371 */ 1372 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1373 int *hdr_len, u8 *hdr_data) 1374 { 1375 int len = 0; 1376 u8 *hdr; 1377 1378 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1379 hdr_len[0] = sizeof(struct vlan_ethhdr); 1380 else 1381 hdr_len[0] = sizeof(struct ethhdr); 1382 1383 if (skb->protocol == htons(ETH_P_IP)) { 1384 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1385 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1386 hdr_len[2] = tcp_hdrlen(skb); 1387 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1388 hdr_len[2] = sizeof(struct udphdr); 1389 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1390 hdr_len[1] = sizeof(struct ipv6hdr); 1391 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1392 hdr_len[2] = tcp_hdrlen(skb); 1393 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1394 hdr_len[2] = sizeof(struct udphdr); 1395 } else if (skb->protocol == htons(ETH_P_ARP)) { 1396 hdr_len[1] = arp_hdr_len(skb->dev); 1397 hdr_len[2] = 0; 1398 } 1399 1400 memset(hdr_data, 0, 120); 1401 if ((hdr_field >> 6) & 1) { 1402 hdr = skb_mac_header(skb); 1403 memcpy(hdr_data, hdr, hdr_len[0]); 1404 len += hdr_len[0]; 1405 } 1406 1407 if ((hdr_field >> 5) & 1) { 1408 hdr = skb_network_header(skb); 1409 memcpy(hdr_data + len, hdr, hdr_len[1]); 1410 len += hdr_len[1]; 1411 } 1412 1413 if ((hdr_field >> 4) & 1) { 1414 hdr = skb_transport_header(skb); 1415 memcpy(hdr_data + len, hdr, hdr_len[2]); 1416 len += hdr_len[2]; 1417 } 1418 return len; 1419 } 1420 1421 /** 1422 * create_hdr_descs - create header and header extension descriptors 1423 * @hdr_field - bitfield determining needed headers 1424 * @data - buffer containing header data 1425 * @len - length of data buffer 1426 * @hdr_len - array of individual header lengths 1427 * @scrq_arr - descriptor array 1428 * 1429 * Creates header and, if needed, header extension descriptors and 1430 * places them in a descriptor array, scrq_arr 1431 */ 1432 1433 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1434 union sub_crq *scrq_arr) 1435 { 1436 union sub_crq hdr_desc; 1437 int tmp_len = len; 1438 int num_descs = 0; 1439 u8 *data, *cur; 1440 int tmp; 1441 1442 while (tmp_len > 0) { 1443 cur = hdr_data + len - tmp_len; 1444 1445 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1446 if (cur != hdr_data) { 1447 data = hdr_desc.hdr_ext.data; 1448 tmp = tmp_len > 29 ? 29 : tmp_len; 1449 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1450 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1451 hdr_desc.hdr_ext.len = tmp; 1452 } else { 1453 data = hdr_desc.hdr.data; 1454 tmp = tmp_len > 24 ? 24 : tmp_len; 1455 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1456 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1457 hdr_desc.hdr.len = tmp; 1458 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1459 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1460 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1461 hdr_desc.hdr.flag = hdr_field << 1; 1462 } 1463 memcpy(data, cur, tmp); 1464 tmp_len -= tmp; 1465 *scrq_arr = hdr_desc; 1466 scrq_arr++; 1467 num_descs++; 1468 } 1469 1470 return num_descs; 1471 } 1472 1473 /** 1474 * build_hdr_descs_arr - build a header descriptor array 1475 * @skb - socket buffer 1476 * @num_entries - number of descriptors to be sent 1477 * @subcrq - first TX descriptor 1478 * @hdr_field - bit field determining which headers will be sent 1479 * 1480 * This function will build a TX descriptor array with applicable 1481 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1482 */ 1483 1484 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1485 int *num_entries, u8 hdr_field) 1486 { 1487 int hdr_len[3] = {0, 0, 0}; 1488 int tot_len; 1489 u8 *hdr_data = txbuff->hdr_data; 1490 1491 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1492 txbuff->hdr_data); 1493 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1494 txbuff->indir_arr + 1); 1495 } 1496 1497 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1498 struct net_device *netdev) 1499 { 1500 /* For some backing devices, mishandling of small packets 1501 * can result in a loss of connection or TX stall. Device 1502 * architects recommend that no packet should be smaller 1503 * than the minimum MTU value provided to the driver, so 1504 * pad any packets to that length 1505 */ 1506 if (skb->len < netdev->min_mtu) 1507 return skb_put_padto(skb, netdev->min_mtu); 1508 1509 return 0; 1510 } 1511 1512 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1513 { 1514 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1515 int queue_num = skb_get_queue_mapping(skb); 1516 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1517 struct device *dev = &adapter->vdev->dev; 1518 struct ibmvnic_tx_buff *tx_buff = NULL; 1519 struct ibmvnic_sub_crq_queue *tx_scrq; 1520 struct ibmvnic_tx_pool *tx_pool; 1521 unsigned int tx_send_failed = 0; 1522 unsigned int tx_map_failed = 0; 1523 unsigned int tx_dropped = 0; 1524 unsigned int tx_packets = 0; 1525 unsigned int tx_bytes = 0; 1526 dma_addr_t data_dma_addr; 1527 struct netdev_queue *txq; 1528 unsigned long lpar_rc; 1529 union sub_crq tx_crq; 1530 unsigned int offset; 1531 int num_entries = 1; 1532 unsigned char *dst; 1533 u64 *handle_array; 1534 int index = 0; 1535 u8 proto = 0; 1536 netdev_tx_t ret = NETDEV_TX_OK; 1537 1538 if (test_bit(0, &adapter->resetting)) { 1539 if (!netif_subqueue_stopped(netdev, skb)) 1540 netif_stop_subqueue(netdev, queue_num); 1541 dev_kfree_skb_any(skb); 1542 1543 tx_send_failed++; 1544 tx_dropped++; 1545 ret = NETDEV_TX_OK; 1546 goto out; 1547 } 1548 1549 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1550 tx_dropped++; 1551 tx_send_failed++; 1552 ret = NETDEV_TX_OK; 1553 goto out; 1554 } 1555 if (skb_is_gso(skb)) 1556 tx_pool = &adapter->tso_pool[queue_num]; 1557 else 1558 tx_pool = &adapter->tx_pool[queue_num]; 1559 1560 tx_scrq = adapter->tx_scrq[queue_num]; 1561 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1562 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1563 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1564 1565 index = tx_pool->free_map[tx_pool->consumer_index]; 1566 1567 if (index == IBMVNIC_INVALID_MAP) { 1568 dev_kfree_skb_any(skb); 1569 tx_send_failed++; 1570 tx_dropped++; 1571 ret = NETDEV_TX_OK; 1572 goto out; 1573 } 1574 1575 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1576 1577 offset = index * tx_pool->buf_size; 1578 dst = tx_pool->long_term_buff.buff + offset; 1579 memset(dst, 0, tx_pool->buf_size); 1580 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1581 1582 if (skb_shinfo(skb)->nr_frags) { 1583 int cur, i; 1584 1585 /* Copy the head */ 1586 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1587 cur = skb_headlen(skb); 1588 1589 /* Copy the frags */ 1590 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1591 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1592 1593 memcpy(dst + cur, 1594 page_address(skb_frag_page(frag)) + 1595 skb_frag_off(frag), skb_frag_size(frag)); 1596 cur += skb_frag_size(frag); 1597 } 1598 } else { 1599 skb_copy_from_linear_data(skb, dst, skb->len); 1600 } 1601 1602 tx_pool->consumer_index = 1603 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1604 1605 tx_buff = &tx_pool->tx_buff[index]; 1606 tx_buff->skb = skb; 1607 tx_buff->data_dma[0] = data_dma_addr; 1608 tx_buff->data_len[0] = skb->len; 1609 tx_buff->index = index; 1610 tx_buff->pool_index = queue_num; 1611 tx_buff->last_frag = true; 1612 1613 memset(&tx_crq, 0, sizeof(tx_crq)); 1614 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1615 tx_crq.v1.type = IBMVNIC_TX_DESC; 1616 tx_crq.v1.n_crq_elem = 1; 1617 tx_crq.v1.n_sge = 1; 1618 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1619 1620 if (skb_is_gso(skb)) 1621 tx_crq.v1.correlator = 1622 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1623 else 1624 tx_crq.v1.correlator = cpu_to_be32(index); 1625 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1626 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1627 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1628 1629 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1630 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1631 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1632 } 1633 1634 if (skb->protocol == htons(ETH_P_IP)) { 1635 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1636 proto = ip_hdr(skb)->protocol; 1637 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1638 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1639 proto = ipv6_hdr(skb)->nexthdr; 1640 } 1641 1642 if (proto == IPPROTO_TCP) 1643 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1644 else if (proto == IPPROTO_UDP) 1645 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1646 1647 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1648 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1649 hdrs += 2; 1650 } 1651 if (skb_is_gso(skb)) { 1652 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1653 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1654 hdrs += 2; 1655 } 1656 /* determine if l2/3/4 headers are sent to firmware */ 1657 if ((*hdrs >> 7) & 1) { 1658 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1659 tx_crq.v1.n_crq_elem = num_entries; 1660 tx_buff->num_entries = num_entries; 1661 tx_buff->indir_arr[0] = tx_crq; 1662 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1663 sizeof(tx_buff->indir_arr), 1664 DMA_TO_DEVICE); 1665 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1666 dev_kfree_skb_any(skb); 1667 tx_buff->skb = NULL; 1668 if (!firmware_has_feature(FW_FEATURE_CMO)) 1669 dev_err(dev, "tx: unable to map descriptor array\n"); 1670 tx_map_failed++; 1671 tx_dropped++; 1672 ret = NETDEV_TX_OK; 1673 goto tx_err_out; 1674 } 1675 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1676 (u64)tx_buff->indir_dma, 1677 (u64)num_entries); 1678 dma_unmap_single(dev, tx_buff->indir_dma, 1679 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE); 1680 } else { 1681 tx_buff->num_entries = num_entries; 1682 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1683 &tx_crq); 1684 } 1685 if (lpar_rc != H_SUCCESS) { 1686 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1687 dev_err_ratelimited(dev, "tx: send failed\n"); 1688 dev_kfree_skb_any(skb); 1689 tx_buff->skb = NULL; 1690 1691 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1692 /* Disable TX and report carrier off if queue is closed 1693 * or pending failover. 1694 * Firmware guarantees that a signal will be sent to the 1695 * driver, triggering a reset or some other action. 1696 */ 1697 netif_tx_stop_all_queues(netdev); 1698 netif_carrier_off(netdev); 1699 } 1700 1701 tx_send_failed++; 1702 tx_dropped++; 1703 ret = NETDEV_TX_OK; 1704 goto tx_err_out; 1705 } 1706 1707 if (atomic_add_return(num_entries, &tx_scrq->used) 1708 >= adapter->req_tx_entries_per_subcrq) { 1709 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1710 netif_stop_subqueue(netdev, queue_num); 1711 } 1712 1713 tx_packets++; 1714 tx_bytes += skb->len; 1715 txq->trans_start = jiffies; 1716 ret = NETDEV_TX_OK; 1717 goto out; 1718 1719 tx_err_out: 1720 /* roll back consumer index and map array*/ 1721 if (tx_pool->consumer_index == 0) 1722 tx_pool->consumer_index = 1723 tx_pool->num_buffers - 1; 1724 else 1725 tx_pool->consumer_index--; 1726 tx_pool->free_map[tx_pool->consumer_index] = index; 1727 out: 1728 netdev->stats.tx_dropped += tx_dropped; 1729 netdev->stats.tx_bytes += tx_bytes; 1730 netdev->stats.tx_packets += tx_packets; 1731 adapter->tx_send_failed += tx_send_failed; 1732 adapter->tx_map_failed += tx_map_failed; 1733 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1734 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1735 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1736 1737 return ret; 1738 } 1739 1740 static void ibmvnic_set_multi(struct net_device *netdev) 1741 { 1742 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1743 struct netdev_hw_addr *ha; 1744 union ibmvnic_crq crq; 1745 1746 memset(&crq, 0, sizeof(crq)); 1747 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1748 crq.request_capability.cmd = REQUEST_CAPABILITY; 1749 1750 if (netdev->flags & IFF_PROMISC) { 1751 if (!adapter->promisc_supported) 1752 return; 1753 } else { 1754 if (netdev->flags & IFF_ALLMULTI) { 1755 /* Accept all multicast */ 1756 memset(&crq, 0, sizeof(crq)); 1757 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1758 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1759 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1760 ibmvnic_send_crq(adapter, &crq); 1761 } else if (netdev_mc_empty(netdev)) { 1762 /* Reject all multicast */ 1763 memset(&crq, 0, sizeof(crq)); 1764 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1765 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1766 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1767 ibmvnic_send_crq(adapter, &crq); 1768 } else { 1769 /* Accept one or more multicast(s) */ 1770 netdev_for_each_mc_addr(ha, netdev) { 1771 memset(&crq, 0, sizeof(crq)); 1772 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1773 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1774 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1775 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1776 ha->addr); 1777 ibmvnic_send_crq(adapter, &crq); 1778 } 1779 } 1780 } 1781 } 1782 1783 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1784 { 1785 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1786 union ibmvnic_crq crq; 1787 int rc; 1788 1789 if (!is_valid_ether_addr(dev_addr)) { 1790 rc = -EADDRNOTAVAIL; 1791 goto err; 1792 } 1793 1794 memset(&crq, 0, sizeof(crq)); 1795 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1796 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1797 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1798 1799 mutex_lock(&adapter->fw_lock); 1800 adapter->fw_done_rc = 0; 1801 reinit_completion(&adapter->fw_done); 1802 1803 rc = ibmvnic_send_crq(adapter, &crq); 1804 if (rc) { 1805 rc = -EIO; 1806 mutex_unlock(&adapter->fw_lock); 1807 goto err; 1808 } 1809 1810 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1811 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1812 if (rc || adapter->fw_done_rc) { 1813 rc = -EIO; 1814 mutex_unlock(&adapter->fw_lock); 1815 goto err; 1816 } 1817 mutex_unlock(&adapter->fw_lock); 1818 return 0; 1819 err: 1820 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1821 return rc; 1822 } 1823 1824 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1825 { 1826 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1827 struct sockaddr *addr = p; 1828 int rc; 1829 1830 rc = 0; 1831 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1832 if (adapter->state != VNIC_PROBED) 1833 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1834 1835 return rc; 1836 } 1837 1838 /** 1839 * do_change_param_reset returns zero if we are able to keep processing reset 1840 * events, or non-zero if we hit a fatal error and must halt. 1841 */ 1842 static int do_change_param_reset(struct ibmvnic_adapter *adapter, 1843 struct ibmvnic_rwi *rwi, 1844 u32 reset_state) 1845 { 1846 struct net_device *netdev = adapter->netdev; 1847 int i, rc; 1848 1849 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n", 1850 rwi->reset_reason); 1851 1852 netif_carrier_off(netdev); 1853 adapter->reset_reason = rwi->reset_reason; 1854 1855 ibmvnic_cleanup(netdev); 1856 1857 if (reset_state == VNIC_OPEN) { 1858 rc = __ibmvnic_close(netdev); 1859 if (rc) 1860 return rc; 1861 } 1862 1863 release_resources(adapter); 1864 release_sub_crqs(adapter, 1); 1865 release_crq_queue(adapter); 1866 1867 adapter->state = VNIC_PROBED; 1868 1869 rc = init_crq_queue(adapter); 1870 1871 if (rc) { 1872 netdev_err(adapter->netdev, 1873 "Couldn't initialize crq. rc=%d\n", rc); 1874 return rc; 1875 } 1876 1877 rc = ibmvnic_reset_init(adapter); 1878 if (rc) 1879 return IBMVNIC_INIT_FAILED; 1880 1881 /* If the adapter was in PROBE state prior to the reset, 1882 * exit here. 1883 */ 1884 if (reset_state == VNIC_PROBED) 1885 return 0; 1886 1887 rc = ibmvnic_login(netdev); 1888 if (rc) { 1889 adapter->state = reset_state; 1890 return rc; 1891 } 1892 1893 rc = init_resources(adapter); 1894 if (rc) 1895 return rc; 1896 1897 ibmvnic_disable_irqs(adapter); 1898 1899 adapter->state = VNIC_CLOSED; 1900 1901 if (reset_state == VNIC_CLOSED) 1902 return 0; 1903 1904 rc = __ibmvnic_open(netdev); 1905 if (rc) 1906 return IBMVNIC_OPEN_FAILED; 1907 1908 /* refresh device's multicast list */ 1909 ibmvnic_set_multi(netdev); 1910 1911 /* kick napi */ 1912 for (i = 0; i < adapter->req_rx_queues; i++) 1913 napi_schedule(&adapter->napi[i]); 1914 1915 return 0; 1916 } 1917 1918 /** 1919 * do_reset returns zero if we are able to keep processing reset events, or 1920 * non-zero if we hit a fatal error and must halt. 1921 */ 1922 static int do_reset(struct ibmvnic_adapter *adapter, 1923 struct ibmvnic_rwi *rwi, u32 reset_state) 1924 { 1925 u64 old_num_rx_queues, old_num_tx_queues; 1926 u64 old_num_rx_slots, old_num_tx_slots; 1927 struct net_device *netdev = adapter->netdev; 1928 int i, rc; 1929 1930 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1931 rwi->reset_reason); 1932 1933 rtnl_lock(); 1934 1935 netif_carrier_off(netdev); 1936 adapter->reset_reason = rwi->reset_reason; 1937 1938 old_num_rx_queues = adapter->req_rx_queues; 1939 old_num_tx_queues = adapter->req_tx_queues; 1940 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1941 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1942 1943 ibmvnic_cleanup(netdev); 1944 1945 if (reset_state == VNIC_OPEN && 1946 adapter->reset_reason != VNIC_RESET_MOBILITY && 1947 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1948 adapter->state = VNIC_CLOSING; 1949 1950 /* Release the RTNL lock before link state change and 1951 * re-acquire after the link state change to allow 1952 * linkwatch_event to grab the RTNL lock and run during 1953 * a reset. 1954 */ 1955 rtnl_unlock(); 1956 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1957 rtnl_lock(); 1958 if (rc) 1959 goto out; 1960 1961 if (adapter->state != VNIC_CLOSING) { 1962 rc = -1; 1963 goto out; 1964 } 1965 1966 adapter->state = VNIC_CLOSED; 1967 } 1968 1969 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1970 /* remove the closed state so when we call open it appears 1971 * we are coming from the probed state. 1972 */ 1973 adapter->state = VNIC_PROBED; 1974 1975 if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1976 rc = ibmvnic_reenable_crq_queue(adapter); 1977 release_sub_crqs(adapter, 1); 1978 } else { 1979 rc = ibmvnic_reset_crq(adapter); 1980 if (rc == H_CLOSED || rc == H_SUCCESS) { 1981 rc = vio_enable_interrupts(adapter->vdev); 1982 if (rc) 1983 netdev_err(adapter->netdev, 1984 "Reset failed to enable interrupts. rc=%d\n", 1985 rc); 1986 } 1987 } 1988 1989 if (rc) { 1990 netdev_err(adapter->netdev, 1991 "Reset couldn't initialize crq. rc=%d\n", rc); 1992 goto out; 1993 } 1994 1995 rc = ibmvnic_reset_init(adapter); 1996 if (rc) { 1997 rc = IBMVNIC_INIT_FAILED; 1998 goto out; 1999 } 2000 2001 /* If the adapter was in PROBE state prior to the reset, 2002 * exit here. 2003 */ 2004 if (reset_state == VNIC_PROBED) { 2005 rc = 0; 2006 goto out; 2007 } 2008 2009 rc = ibmvnic_login(netdev); 2010 if (rc) { 2011 adapter->state = reset_state; 2012 goto out; 2013 } 2014 2015 if (adapter->req_rx_queues != old_num_rx_queues || 2016 adapter->req_tx_queues != old_num_tx_queues || 2017 adapter->req_rx_add_entries_per_subcrq != 2018 old_num_rx_slots || 2019 adapter->req_tx_entries_per_subcrq != 2020 old_num_tx_slots || 2021 !adapter->rx_pool || 2022 !adapter->tso_pool || 2023 !adapter->tx_pool) { 2024 release_rx_pools(adapter); 2025 release_tx_pools(adapter); 2026 release_napi(adapter); 2027 release_vpd_data(adapter); 2028 2029 rc = init_resources(adapter); 2030 if (rc) 2031 goto out; 2032 2033 } else { 2034 rc = reset_tx_pools(adapter); 2035 if (rc) { 2036 netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n", 2037 rc); 2038 goto out; 2039 } 2040 2041 rc = reset_rx_pools(adapter); 2042 if (rc) { 2043 netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n", 2044 rc); 2045 goto out; 2046 } 2047 } 2048 ibmvnic_disable_irqs(adapter); 2049 } 2050 adapter->state = VNIC_CLOSED; 2051 2052 if (reset_state == VNIC_CLOSED) { 2053 rc = 0; 2054 goto out; 2055 } 2056 2057 rc = __ibmvnic_open(netdev); 2058 if (rc) { 2059 rc = IBMVNIC_OPEN_FAILED; 2060 goto out; 2061 } 2062 2063 /* refresh device's multicast list */ 2064 ibmvnic_set_multi(netdev); 2065 2066 /* kick napi */ 2067 for (i = 0; i < adapter->req_rx_queues; i++) 2068 napi_schedule(&adapter->napi[i]); 2069 2070 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 2071 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 2072 2073 rc = 0; 2074 2075 out: 2076 rtnl_unlock(); 2077 2078 return rc; 2079 } 2080 2081 static int do_hard_reset(struct ibmvnic_adapter *adapter, 2082 struct ibmvnic_rwi *rwi, u32 reset_state) 2083 { 2084 struct net_device *netdev = adapter->netdev; 2085 int rc; 2086 2087 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 2088 rwi->reset_reason); 2089 2090 netif_carrier_off(netdev); 2091 adapter->reset_reason = rwi->reset_reason; 2092 2093 ibmvnic_cleanup(netdev); 2094 release_resources(adapter); 2095 release_sub_crqs(adapter, 0); 2096 release_crq_queue(adapter); 2097 2098 /* remove the closed state so when we call open it appears 2099 * we are coming from the probed state. 2100 */ 2101 adapter->state = VNIC_PROBED; 2102 2103 reinit_completion(&adapter->init_done); 2104 rc = init_crq_queue(adapter); 2105 if (rc) { 2106 netdev_err(adapter->netdev, 2107 "Couldn't initialize crq. rc=%d\n", rc); 2108 return rc; 2109 } 2110 2111 rc = ibmvnic_init(adapter); 2112 if (rc) 2113 return rc; 2114 2115 /* If the adapter was in PROBE state prior to the reset, 2116 * exit here. 2117 */ 2118 if (reset_state == VNIC_PROBED) 2119 return 0; 2120 2121 rc = ibmvnic_login(netdev); 2122 if (rc) { 2123 adapter->state = VNIC_PROBED; 2124 return 0; 2125 } 2126 2127 rc = init_resources(adapter); 2128 if (rc) 2129 return rc; 2130 2131 ibmvnic_disable_irqs(adapter); 2132 adapter->state = VNIC_CLOSED; 2133 2134 if (reset_state == VNIC_CLOSED) 2135 return 0; 2136 2137 rc = __ibmvnic_open(netdev); 2138 if (rc) 2139 return IBMVNIC_OPEN_FAILED; 2140 2141 return 0; 2142 } 2143 2144 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2145 { 2146 struct ibmvnic_rwi *rwi; 2147 unsigned long flags; 2148 2149 spin_lock_irqsave(&adapter->rwi_lock, flags); 2150 2151 if (!list_empty(&adapter->rwi_list)) { 2152 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2153 list); 2154 list_del(&rwi->list); 2155 } else { 2156 rwi = NULL; 2157 } 2158 2159 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2160 return rwi; 2161 } 2162 2163 static void free_all_rwi(struct ibmvnic_adapter *adapter) 2164 { 2165 struct ibmvnic_rwi *rwi; 2166 2167 rwi = get_next_rwi(adapter); 2168 while (rwi) { 2169 kfree(rwi); 2170 rwi = get_next_rwi(adapter); 2171 } 2172 } 2173 2174 static void __ibmvnic_reset(struct work_struct *work) 2175 { 2176 struct ibmvnic_rwi *rwi; 2177 struct ibmvnic_adapter *adapter; 2178 bool saved_state = false; 2179 unsigned long flags; 2180 u32 reset_state; 2181 int rc = 0; 2182 2183 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2184 2185 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2186 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2187 IBMVNIC_RESET_DELAY); 2188 return; 2189 } 2190 2191 rwi = get_next_rwi(adapter); 2192 while (rwi) { 2193 spin_lock_irqsave(&adapter->state_lock, flags); 2194 2195 if (adapter->state == VNIC_REMOVING || 2196 adapter->state == VNIC_REMOVED) { 2197 spin_unlock_irqrestore(&adapter->state_lock, flags); 2198 kfree(rwi); 2199 rc = EBUSY; 2200 break; 2201 } 2202 2203 if (!saved_state) { 2204 reset_state = adapter->state; 2205 adapter->state = VNIC_RESETTING; 2206 saved_state = true; 2207 } 2208 spin_unlock_irqrestore(&adapter->state_lock, flags); 2209 2210 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2211 /* CHANGE_PARAM requestor holds rtnl_lock */ 2212 rc = do_change_param_reset(adapter, rwi, reset_state); 2213 } else if (adapter->force_reset_recovery) { 2214 /* Transport event occurred during previous reset */ 2215 if (adapter->wait_for_reset) { 2216 /* Previous was CHANGE_PARAM; caller locked */ 2217 adapter->force_reset_recovery = false; 2218 rc = do_hard_reset(adapter, rwi, reset_state); 2219 } else { 2220 rtnl_lock(); 2221 adapter->force_reset_recovery = false; 2222 rc = do_hard_reset(adapter, rwi, reset_state); 2223 rtnl_unlock(); 2224 } 2225 } else if (!(rwi->reset_reason == VNIC_RESET_FATAL && 2226 adapter->from_passive_init)) { 2227 rc = do_reset(adapter, rwi, reset_state); 2228 } 2229 kfree(rwi); 2230 if (rc == IBMVNIC_OPEN_FAILED) { 2231 if (list_empty(&adapter->rwi_list)) 2232 adapter->state = VNIC_CLOSED; 2233 else 2234 adapter->state = reset_state; 2235 rc = 0; 2236 } else if (rc && rc != IBMVNIC_INIT_FAILED && 2237 !adapter->force_reset_recovery) 2238 break; 2239 2240 rwi = get_next_rwi(adapter); 2241 2242 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2243 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2244 adapter->force_reset_recovery = true; 2245 } 2246 2247 if (adapter->wait_for_reset) { 2248 adapter->reset_done_rc = rc; 2249 complete(&adapter->reset_done); 2250 } 2251 2252 if (rc) { 2253 netdev_dbg(adapter->netdev, "Reset failed\n"); 2254 free_all_rwi(adapter); 2255 } 2256 2257 clear_bit_unlock(0, &adapter->resetting); 2258 } 2259 2260 static void __ibmvnic_delayed_reset(struct work_struct *work) 2261 { 2262 struct ibmvnic_adapter *adapter; 2263 2264 adapter = container_of(work, struct ibmvnic_adapter, 2265 ibmvnic_delayed_reset.work); 2266 __ibmvnic_reset(&adapter->ibmvnic_reset); 2267 } 2268 2269 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2270 enum ibmvnic_reset_reason reason) 2271 { 2272 struct list_head *entry, *tmp_entry; 2273 struct ibmvnic_rwi *rwi, *tmp; 2274 struct net_device *netdev = adapter->netdev; 2275 unsigned long flags; 2276 int ret; 2277 2278 if (adapter->state == VNIC_REMOVING || 2279 adapter->state == VNIC_REMOVED || 2280 adapter->failover_pending) { 2281 ret = EBUSY; 2282 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2283 goto err; 2284 } 2285 2286 if (adapter->state == VNIC_PROBING) { 2287 netdev_warn(netdev, "Adapter reset during probe\n"); 2288 ret = adapter->init_done_rc = EAGAIN; 2289 goto err; 2290 } 2291 2292 spin_lock_irqsave(&adapter->rwi_lock, flags); 2293 2294 list_for_each(entry, &adapter->rwi_list) { 2295 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2296 if (tmp->reset_reason == reason) { 2297 netdev_dbg(netdev, "Skipping matching reset\n"); 2298 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2299 ret = EBUSY; 2300 goto err; 2301 } 2302 } 2303 2304 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2305 if (!rwi) { 2306 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2307 ibmvnic_close(netdev); 2308 ret = ENOMEM; 2309 goto err; 2310 } 2311 /* if we just received a transport event, 2312 * flush reset queue and process this reset 2313 */ 2314 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2315 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2316 list_del(entry); 2317 } 2318 rwi->reset_reason = reason; 2319 list_add_tail(&rwi->list, &adapter->rwi_list); 2320 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2321 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2322 schedule_work(&adapter->ibmvnic_reset); 2323 2324 return 0; 2325 err: 2326 return -ret; 2327 } 2328 2329 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 2330 { 2331 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2332 2333 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2334 } 2335 2336 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2337 struct ibmvnic_rx_buff *rx_buff) 2338 { 2339 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2340 2341 rx_buff->skb = NULL; 2342 2343 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2344 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2345 2346 atomic_dec(&pool->available); 2347 } 2348 2349 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2350 { 2351 struct net_device *netdev = napi->dev; 2352 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2353 int scrq_num = (int)(napi - adapter->napi); 2354 int frames_processed = 0; 2355 2356 restart_poll: 2357 while (frames_processed < budget) { 2358 struct sk_buff *skb; 2359 struct ibmvnic_rx_buff *rx_buff; 2360 union sub_crq *next; 2361 u32 length; 2362 u16 offset; 2363 u8 flags = 0; 2364 2365 if (unlikely(test_bit(0, &adapter->resetting) && 2366 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2367 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2368 napi_complete_done(napi, frames_processed); 2369 return frames_processed; 2370 } 2371 2372 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2373 break; 2374 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2375 rx_buff = 2376 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2377 rx_comp.correlator); 2378 /* do error checking */ 2379 if (next->rx_comp.rc) { 2380 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2381 be16_to_cpu(next->rx_comp.rc)); 2382 /* free the entry */ 2383 next->rx_comp.first = 0; 2384 dev_kfree_skb_any(rx_buff->skb); 2385 remove_buff_from_pool(adapter, rx_buff); 2386 continue; 2387 } else if (!rx_buff->skb) { 2388 /* free the entry */ 2389 next->rx_comp.first = 0; 2390 remove_buff_from_pool(adapter, rx_buff); 2391 continue; 2392 } 2393 2394 length = be32_to_cpu(next->rx_comp.len); 2395 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2396 flags = next->rx_comp.flags; 2397 skb = rx_buff->skb; 2398 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2399 length); 2400 2401 /* VLAN Header has been stripped by the system firmware and 2402 * needs to be inserted by the driver 2403 */ 2404 if (adapter->rx_vlan_header_insertion && 2405 (flags & IBMVNIC_VLAN_STRIPPED)) 2406 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2407 ntohs(next->rx_comp.vlan_tci)); 2408 2409 /* free the entry */ 2410 next->rx_comp.first = 0; 2411 remove_buff_from_pool(adapter, rx_buff); 2412 2413 skb_put(skb, length); 2414 skb->protocol = eth_type_trans(skb, netdev); 2415 skb_record_rx_queue(skb, scrq_num); 2416 2417 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2418 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2419 skb->ip_summed = CHECKSUM_UNNECESSARY; 2420 } 2421 2422 length = skb->len; 2423 napi_gro_receive(napi, skb); /* send it up */ 2424 netdev->stats.rx_packets++; 2425 netdev->stats.rx_bytes += length; 2426 adapter->rx_stats_buffers[scrq_num].packets++; 2427 adapter->rx_stats_buffers[scrq_num].bytes += length; 2428 frames_processed++; 2429 } 2430 2431 if (adapter->state != VNIC_CLOSING) 2432 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2433 2434 if (frames_processed < budget) { 2435 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2436 napi_complete_done(napi, frames_processed); 2437 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2438 napi_reschedule(napi)) { 2439 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2440 goto restart_poll; 2441 } 2442 } 2443 return frames_processed; 2444 } 2445 2446 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2447 { 2448 int rc, ret; 2449 2450 adapter->fallback.mtu = adapter->req_mtu; 2451 adapter->fallback.rx_queues = adapter->req_rx_queues; 2452 adapter->fallback.tx_queues = adapter->req_tx_queues; 2453 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2454 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2455 2456 reinit_completion(&adapter->reset_done); 2457 adapter->wait_for_reset = true; 2458 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2459 2460 if (rc) { 2461 ret = rc; 2462 goto out; 2463 } 2464 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 2465 if (rc) { 2466 ret = -ENODEV; 2467 goto out; 2468 } 2469 2470 ret = 0; 2471 if (adapter->reset_done_rc) { 2472 ret = -EIO; 2473 adapter->desired.mtu = adapter->fallback.mtu; 2474 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2475 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2476 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2477 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2478 2479 reinit_completion(&adapter->reset_done); 2480 adapter->wait_for_reset = true; 2481 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2482 if (rc) { 2483 ret = rc; 2484 goto out; 2485 } 2486 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 2487 60000); 2488 if (rc) { 2489 ret = -ENODEV; 2490 goto out; 2491 } 2492 } 2493 out: 2494 adapter->wait_for_reset = false; 2495 2496 return ret; 2497 } 2498 2499 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2500 { 2501 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2502 2503 adapter->desired.mtu = new_mtu + ETH_HLEN; 2504 2505 return wait_for_reset(adapter); 2506 } 2507 2508 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2509 struct net_device *dev, 2510 netdev_features_t features) 2511 { 2512 /* Some backing hardware adapters can not 2513 * handle packets with a MSS less than 224 2514 * or with only one segment. 2515 */ 2516 if (skb_is_gso(skb)) { 2517 if (skb_shinfo(skb)->gso_size < 224 || 2518 skb_shinfo(skb)->gso_segs == 1) 2519 features &= ~NETIF_F_GSO_MASK; 2520 } 2521 2522 return features; 2523 } 2524 2525 static const struct net_device_ops ibmvnic_netdev_ops = { 2526 .ndo_open = ibmvnic_open, 2527 .ndo_stop = ibmvnic_close, 2528 .ndo_start_xmit = ibmvnic_xmit, 2529 .ndo_set_rx_mode = ibmvnic_set_multi, 2530 .ndo_set_mac_address = ibmvnic_set_mac, 2531 .ndo_validate_addr = eth_validate_addr, 2532 .ndo_tx_timeout = ibmvnic_tx_timeout, 2533 .ndo_change_mtu = ibmvnic_change_mtu, 2534 .ndo_features_check = ibmvnic_features_check, 2535 }; 2536 2537 /* ethtool functions */ 2538 2539 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2540 struct ethtool_link_ksettings *cmd) 2541 { 2542 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2543 int rc; 2544 2545 rc = send_query_phys_parms(adapter); 2546 if (rc) { 2547 adapter->speed = SPEED_UNKNOWN; 2548 adapter->duplex = DUPLEX_UNKNOWN; 2549 } 2550 cmd->base.speed = adapter->speed; 2551 cmd->base.duplex = adapter->duplex; 2552 cmd->base.port = PORT_FIBRE; 2553 cmd->base.phy_address = 0; 2554 cmd->base.autoneg = AUTONEG_ENABLE; 2555 2556 return 0; 2557 } 2558 2559 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2560 struct ethtool_drvinfo *info) 2561 { 2562 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2563 2564 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2565 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2566 strlcpy(info->fw_version, adapter->fw_version, 2567 sizeof(info->fw_version)); 2568 } 2569 2570 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2571 { 2572 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2573 2574 return adapter->msg_enable; 2575 } 2576 2577 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2578 { 2579 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2580 2581 adapter->msg_enable = data; 2582 } 2583 2584 static u32 ibmvnic_get_link(struct net_device *netdev) 2585 { 2586 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2587 2588 /* Don't need to send a query because we request a logical link up at 2589 * init and then we wait for link state indications 2590 */ 2591 return adapter->logical_link_state; 2592 } 2593 2594 static void ibmvnic_get_ringparam(struct net_device *netdev, 2595 struct ethtool_ringparam *ring) 2596 { 2597 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2598 2599 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2600 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2601 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2602 } else { 2603 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2604 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2605 } 2606 ring->rx_mini_max_pending = 0; 2607 ring->rx_jumbo_max_pending = 0; 2608 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2609 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2610 ring->rx_mini_pending = 0; 2611 ring->rx_jumbo_pending = 0; 2612 } 2613 2614 static int ibmvnic_set_ringparam(struct net_device *netdev, 2615 struct ethtool_ringparam *ring) 2616 { 2617 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2618 int ret; 2619 2620 ret = 0; 2621 adapter->desired.rx_entries = ring->rx_pending; 2622 adapter->desired.tx_entries = ring->tx_pending; 2623 2624 ret = wait_for_reset(adapter); 2625 2626 if (!ret && 2627 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2628 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2629 netdev_info(netdev, 2630 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2631 ring->rx_pending, ring->tx_pending, 2632 adapter->req_rx_add_entries_per_subcrq, 2633 adapter->req_tx_entries_per_subcrq); 2634 return ret; 2635 } 2636 2637 static void ibmvnic_get_channels(struct net_device *netdev, 2638 struct ethtool_channels *channels) 2639 { 2640 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2641 2642 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2643 channels->max_rx = adapter->max_rx_queues; 2644 channels->max_tx = adapter->max_tx_queues; 2645 } else { 2646 channels->max_rx = IBMVNIC_MAX_QUEUES; 2647 channels->max_tx = IBMVNIC_MAX_QUEUES; 2648 } 2649 2650 channels->max_other = 0; 2651 channels->max_combined = 0; 2652 channels->rx_count = adapter->req_rx_queues; 2653 channels->tx_count = adapter->req_tx_queues; 2654 channels->other_count = 0; 2655 channels->combined_count = 0; 2656 } 2657 2658 static int ibmvnic_set_channels(struct net_device *netdev, 2659 struct ethtool_channels *channels) 2660 { 2661 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2662 int ret; 2663 2664 ret = 0; 2665 adapter->desired.rx_queues = channels->rx_count; 2666 adapter->desired.tx_queues = channels->tx_count; 2667 2668 ret = wait_for_reset(adapter); 2669 2670 if (!ret && 2671 (adapter->req_rx_queues != channels->rx_count || 2672 adapter->req_tx_queues != channels->tx_count)) 2673 netdev_info(netdev, 2674 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2675 channels->rx_count, channels->tx_count, 2676 adapter->req_rx_queues, adapter->req_tx_queues); 2677 return ret; 2678 2679 } 2680 2681 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2682 { 2683 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2684 int i; 2685 2686 switch (stringset) { 2687 case ETH_SS_STATS: 2688 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2689 i++, data += ETH_GSTRING_LEN) 2690 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2691 2692 for (i = 0; i < adapter->req_tx_queues; i++) { 2693 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2694 data += ETH_GSTRING_LEN; 2695 2696 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2697 data += ETH_GSTRING_LEN; 2698 2699 snprintf(data, ETH_GSTRING_LEN, 2700 "tx%d_dropped_packets", i); 2701 data += ETH_GSTRING_LEN; 2702 } 2703 2704 for (i = 0; i < adapter->req_rx_queues; i++) { 2705 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2706 data += ETH_GSTRING_LEN; 2707 2708 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2709 data += ETH_GSTRING_LEN; 2710 2711 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2712 data += ETH_GSTRING_LEN; 2713 } 2714 break; 2715 2716 case ETH_SS_PRIV_FLAGS: 2717 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2718 strcpy(data + i * ETH_GSTRING_LEN, 2719 ibmvnic_priv_flags[i]); 2720 break; 2721 default: 2722 return; 2723 } 2724 } 2725 2726 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2727 { 2728 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2729 2730 switch (sset) { 2731 case ETH_SS_STATS: 2732 return ARRAY_SIZE(ibmvnic_stats) + 2733 adapter->req_tx_queues * NUM_TX_STATS + 2734 adapter->req_rx_queues * NUM_RX_STATS; 2735 case ETH_SS_PRIV_FLAGS: 2736 return ARRAY_SIZE(ibmvnic_priv_flags); 2737 default: 2738 return -EOPNOTSUPP; 2739 } 2740 } 2741 2742 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2743 struct ethtool_stats *stats, u64 *data) 2744 { 2745 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2746 union ibmvnic_crq crq; 2747 int i, j; 2748 int rc; 2749 2750 memset(&crq, 0, sizeof(crq)); 2751 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2752 crq.request_statistics.cmd = REQUEST_STATISTICS; 2753 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2754 crq.request_statistics.len = 2755 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2756 2757 /* Wait for data to be written */ 2758 reinit_completion(&adapter->stats_done); 2759 rc = ibmvnic_send_crq(adapter, &crq); 2760 if (rc) 2761 return; 2762 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 2763 if (rc) 2764 return; 2765 2766 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2767 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2768 ibmvnic_stats[i].offset)); 2769 2770 for (j = 0; j < adapter->req_tx_queues; j++) { 2771 data[i] = adapter->tx_stats_buffers[j].packets; 2772 i++; 2773 data[i] = adapter->tx_stats_buffers[j].bytes; 2774 i++; 2775 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2776 i++; 2777 } 2778 2779 for (j = 0; j < adapter->req_rx_queues; j++) { 2780 data[i] = adapter->rx_stats_buffers[j].packets; 2781 i++; 2782 data[i] = adapter->rx_stats_buffers[j].bytes; 2783 i++; 2784 data[i] = adapter->rx_stats_buffers[j].interrupts; 2785 i++; 2786 } 2787 } 2788 2789 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2790 { 2791 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2792 2793 return adapter->priv_flags; 2794 } 2795 2796 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2797 { 2798 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2799 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2800 2801 if (which_maxes) 2802 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2803 else 2804 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2805 2806 return 0; 2807 } 2808 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2809 .get_drvinfo = ibmvnic_get_drvinfo, 2810 .get_msglevel = ibmvnic_get_msglevel, 2811 .set_msglevel = ibmvnic_set_msglevel, 2812 .get_link = ibmvnic_get_link, 2813 .get_ringparam = ibmvnic_get_ringparam, 2814 .set_ringparam = ibmvnic_set_ringparam, 2815 .get_channels = ibmvnic_get_channels, 2816 .set_channels = ibmvnic_set_channels, 2817 .get_strings = ibmvnic_get_strings, 2818 .get_sset_count = ibmvnic_get_sset_count, 2819 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2820 .get_link_ksettings = ibmvnic_get_link_ksettings, 2821 .get_priv_flags = ibmvnic_get_priv_flags, 2822 .set_priv_flags = ibmvnic_set_priv_flags, 2823 }; 2824 2825 /* Routines for managing CRQs/sCRQs */ 2826 2827 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2828 struct ibmvnic_sub_crq_queue *scrq) 2829 { 2830 int rc; 2831 2832 if (scrq->irq) { 2833 free_irq(scrq->irq, scrq); 2834 irq_dispose_mapping(scrq->irq); 2835 scrq->irq = 0; 2836 } 2837 2838 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2839 atomic_set(&scrq->used, 0); 2840 scrq->cur = 0; 2841 2842 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2843 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2844 return rc; 2845 } 2846 2847 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2848 { 2849 int i, rc; 2850 2851 for (i = 0; i < adapter->req_tx_queues; i++) { 2852 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2853 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2854 if (rc) 2855 return rc; 2856 } 2857 2858 for (i = 0; i < adapter->req_rx_queues; i++) { 2859 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2860 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2861 if (rc) 2862 return rc; 2863 } 2864 2865 return rc; 2866 } 2867 2868 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2869 struct ibmvnic_sub_crq_queue *scrq, 2870 bool do_h_free) 2871 { 2872 struct device *dev = &adapter->vdev->dev; 2873 long rc; 2874 2875 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2876 2877 if (do_h_free) { 2878 /* Close the sub-crqs */ 2879 do { 2880 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2881 adapter->vdev->unit_address, 2882 scrq->crq_num); 2883 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2884 2885 if (rc) { 2886 netdev_err(adapter->netdev, 2887 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2888 scrq->crq_num, rc); 2889 } 2890 } 2891 2892 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2893 DMA_BIDIRECTIONAL); 2894 free_pages((unsigned long)scrq->msgs, 2); 2895 kfree(scrq); 2896 } 2897 2898 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2899 *adapter) 2900 { 2901 struct device *dev = &adapter->vdev->dev; 2902 struct ibmvnic_sub_crq_queue *scrq; 2903 int rc; 2904 2905 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2906 if (!scrq) 2907 return NULL; 2908 2909 scrq->msgs = 2910 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2911 if (!scrq->msgs) { 2912 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2913 goto zero_page_failed; 2914 } 2915 2916 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2917 DMA_BIDIRECTIONAL); 2918 if (dma_mapping_error(dev, scrq->msg_token)) { 2919 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2920 goto map_failed; 2921 } 2922 2923 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2924 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2925 2926 if (rc == H_RESOURCE) 2927 rc = ibmvnic_reset_crq(adapter); 2928 2929 if (rc == H_CLOSED) { 2930 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2931 } else if (rc) { 2932 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2933 goto reg_failed; 2934 } 2935 2936 scrq->adapter = adapter; 2937 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2938 spin_lock_init(&scrq->lock); 2939 2940 netdev_dbg(adapter->netdev, 2941 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2942 scrq->crq_num, scrq->hw_irq, scrq->irq); 2943 2944 return scrq; 2945 2946 reg_failed: 2947 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2948 DMA_BIDIRECTIONAL); 2949 map_failed: 2950 free_pages((unsigned long)scrq->msgs, 2); 2951 zero_page_failed: 2952 kfree(scrq); 2953 2954 return NULL; 2955 } 2956 2957 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2958 { 2959 int i; 2960 2961 if (adapter->tx_scrq) { 2962 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2963 if (!adapter->tx_scrq[i]) 2964 continue; 2965 2966 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2967 i); 2968 if (adapter->tx_scrq[i]->irq) { 2969 free_irq(adapter->tx_scrq[i]->irq, 2970 adapter->tx_scrq[i]); 2971 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2972 adapter->tx_scrq[i]->irq = 0; 2973 } 2974 2975 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2976 do_h_free); 2977 } 2978 2979 kfree(adapter->tx_scrq); 2980 adapter->tx_scrq = NULL; 2981 adapter->num_active_tx_scrqs = 0; 2982 } 2983 2984 if (adapter->rx_scrq) { 2985 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2986 if (!adapter->rx_scrq[i]) 2987 continue; 2988 2989 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2990 i); 2991 if (adapter->rx_scrq[i]->irq) { 2992 free_irq(adapter->rx_scrq[i]->irq, 2993 adapter->rx_scrq[i]); 2994 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2995 adapter->rx_scrq[i]->irq = 0; 2996 } 2997 2998 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2999 do_h_free); 3000 } 3001 3002 kfree(adapter->rx_scrq); 3003 adapter->rx_scrq = NULL; 3004 adapter->num_active_rx_scrqs = 0; 3005 } 3006 } 3007 3008 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 3009 struct ibmvnic_sub_crq_queue *scrq) 3010 { 3011 struct device *dev = &adapter->vdev->dev; 3012 unsigned long rc; 3013 3014 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3015 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3016 if (rc) 3017 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 3018 scrq->hw_irq, rc); 3019 return rc; 3020 } 3021 3022 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 3023 struct ibmvnic_sub_crq_queue *scrq) 3024 { 3025 struct device *dev = &adapter->vdev->dev; 3026 unsigned long rc; 3027 3028 if (scrq->hw_irq > 0x100000000ULL) { 3029 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 3030 return 1; 3031 } 3032 3033 if (test_bit(0, &adapter->resetting) && 3034 adapter->reset_reason == VNIC_RESET_MOBILITY) { 3035 u64 val = (0xff000000) | scrq->hw_irq; 3036 3037 rc = plpar_hcall_norets(H_EOI, val); 3038 /* H_EOI would fail with rc = H_FUNCTION when running 3039 * in XIVE mode which is expected, but not an error. 3040 */ 3041 if (rc && (rc != H_FUNCTION)) 3042 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 3043 val, rc); 3044 } 3045 3046 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 3047 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 3048 if (rc) 3049 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 3050 scrq->hw_irq, rc); 3051 return rc; 3052 } 3053 3054 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 3055 struct ibmvnic_sub_crq_queue *scrq) 3056 { 3057 struct device *dev = &adapter->vdev->dev; 3058 struct ibmvnic_tx_pool *tx_pool; 3059 struct ibmvnic_tx_buff *txbuff; 3060 union sub_crq *next; 3061 int index; 3062 int i, j; 3063 3064 restart_loop: 3065 while (pending_scrq(adapter, scrq)) { 3066 unsigned int pool = scrq->pool_index; 3067 int num_entries = 0; 3068 3069 next = ibmvnic_next_scrq(adapter, scrq); 3070 for (i = 0; i < next->tx_comp.num_comps; i++) { 3071 if (next->tx_comp.rcs[i]) { 3072 dev_err(dev, "tx error %x\n", 3073 next->tx_comp.rcs[i]); 3074 continue; 3075 } 3076 index = be32_to_cpu(next->tx_comp.correlators[i]); 3077 if (index & IBMVNIC_TSO_POOL_MASK) { 3078 tx_pool = &adapter->tso_pool[pool]; 3079 index &= ~IBMVNIC_TSO_POOL_MASK; 3080 } else { 3081 tx_pool = &adapter->tx_pool[pool]; 3082 } 3083 3084 txbuff = &tx_pool->tx_buff[index]; 3085 3086 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 3087 if (!txbuff->data_dma[j]) 3088 continue; 3089 3090 txbuff->data_dma[j] = 0; 3091 } 3092 3093 if (txbuff->last_frag) { 3094 dev_kfree_skb_any(txbuff->skb); 3095 txbuff->skb = NULL; 3096 } 3097 3098 num_entries += txbuff->num_entries; 3099 3100 tx_pool->free_map[tx_pool->producer_index] = index; 3101 tx_pool->producer_index = 3102 (tx_pool->producer_index + 1) % 3103 tx_pool->num_buffers; 3104 } 3105 /* remove tx_comp scrq*/ 3106 next->tx_comp.first = 0; 3107 3108 if (atomic_sub_return(num_entries, &scrq->used) <= 3109 (adapter->req_tx_entries_per_subcrq / 2) && 3110 __netif_subqueue_stopped(adapter->netdev, 3111 scrq->pool_index)) { 3112 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 3113 netdev_dbg(adapter->netdev, "Started queue %d\n", 3114 scrq->pool_index); 3115 } 3116 } 3117 3118 enable_scrq_irq(adapter, scrq); 3119 3120 if (pending_scrq(adapter, scrq)) { 3121 disable_scrq_irq(adapter, scrq); 3122 goto restart_loop; 3123 } 3124 3125 return 0; 3126 } 3127 3128 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 3129 { 3130 struct ibmvnic_sub_crq_queue *scrq = instance; 3131 struct ibmvnic_adapter *adapter = scrq->adapter; 3132 3133 disable_scrq_irq(adapter, scrq); 3134 ibmvnic_complete_tx(adapter, scrq); 3135 3136 return IRQ_HANDLED; 3137 } 3138 3139 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 3140 { 3141 struct ibmvnic_sub_crq_queue *scrq = instance; 3142 struct ibmvnic_adapter *adapter = scrq->adapter; 3143 3144 /* When booting a kdump kernel we can hit pending interrupts 3145 * prior to completing driver initialization. 3146 */ 3147 if (unlikely(adapter->state != VNIC_OPEN)) 3148 return IRQ_NONE; 3149 3150 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 3151 3152 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 3153 disable_scrq_irq(adapter, scrq); 3154 __napi_schedule(&adapter->napi[scrq->scrq_num]); 3155 } 3156 3157 return IRQ_HANDLED; 3158 } 3159 3160 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3161 { 3162 struct device *dev = &adapter->vdev->dev; 3163 struct ibmvnic_sub_crq_queue *scrq; 3164 int i = 0, j = 0; 3165 int rc = 0; 3166 3167 for (i = 0; i < adapter->req_tx_queues; i++) { 3168 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3169 i); 3170 scrq = adapter->tx_scrq[i]; 3171 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3172 3173 if (!scrq->irq) { 3174 rc = -EINVAL; 3175 dev_err(dev, "Error mapping irq\n"); 3176 goto req_tx_irq_failed; 3177 } 3178 3179 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3180 adapter->vdev->unit_address, i); 3181 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3182 0, scrq->name, scrq); 3183 3184 if (rc) { 3185 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3186 scrq->irq, rc); 3187 irq_dispose_mapping(scrq->irq); 3188 goto req_tx_irq_failed; 3189 } 3190 } 3191 3192 for (i = 0; i < adapter->req_rx_queues; i++) { 3193 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3194 i); 3195 scrq = adapter->rx_scrq[i]; 3196 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3197 if (!scrq->irq) { 3198 rc = -EINVAL; 3199 dev_err(dev, "Error mapping irq\n"); 3200 goto req_rx_irq_failed; 3201 } 3202 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3203 adapter->vdev->unit_address, i); 3204 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3205 0, scrq->name, scrq); 3206 if (rc) { 3207 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3208 scrq->irq, rc); 3209 irq_dispose_mapping(scrq->irq); 3210 goto req_rx_irq_failed; 3211 } 3212 } 3213 return rc; 3214 3215 req_rx_irq_failed: 3216 for (j = 0; j < i; j++) { 3217 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3218 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3219 } 3220 i = adapter->req_tx_queues; 3221 req_tx_irq_failed: 3222 for (j = 0; j < i; j++) { 3223 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3224 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 3225 } 3226 release_sub_crqs(adapter, 1); 3227 return rc; 3228 } 3229 3230 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3231 { 3232 struct device *dev = &adapter->vdev->dev; 3233 struct ibmvnic_sub_crq_queue **allqueues; 3234 int registered_queues = 0; 3235 int total_queues; 3236 int more = 0; 3237 int i; 3238 3239 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3240 3241 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3242 if (!allqueues) 3243 return -1; 3244 3245 for (i = 0; i < total_queues; i++) { 3246 allqueues[i] = init_sub_crq_queue(adapter); 3247 if (!allqueues[i]) { 3248 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3249 break; 3250 } 3251 registered_queues++; 3252 } 3253 3254 /* Make sure we were able to register the minimum number of queues */ 3255 if (registered_queues < 3256 adapter->min_tx_queues + adapter->min_rx_queues) { 3257 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3258 goto tx_failed; 3259 } 3260 3261 /* Distribute the failed allocated queues*/ 3262 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3263 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3264 switch (i % 3) { 3265 case 0: 3266 if (adapter->req_rx_queues > adapter->min_rx_queues) 3267 adapter->req_rx_queues--; 3268 else 3269 more++; 3270 break; 3271 case 1: 3272 if (adapter->req_tx_queues > adapter->min_tx_queues) 3273 adapter->req_tx_queues--; 3274 else 3275 more++; 3276 break; 3277 } 3278 } 3279 3280 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3281 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3282 if (!adapter->tx_scrq) 3283 goto tx_failed; 3284 3285 for (i = 0; i < adapter->req_tx_queues; i++) { 3286 adapter->tx_scrq[i] = allqueues[i]; 3287 adapter->tx_scrq[i]->pool_index = i; 3288 adapter->num_active_tx_scrqs++; 3289 } 3290 3291 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3292 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3293 if (!adapter->rx_scrq) 3294 goto rx_failed; 3295 3296 for (i = 0; i < adapter->req_rx_queues; i++) { 3297 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3298 adapter->rx_scrq[i]->scrq_num = i; 3299 adapter->num_active_rx_scrqs++; 3300 } 3301 3302 kfree(allqueues); 3303 return 0; 3304 3305 rx_failed: 3306 kfree(adapter->tx_scrq); 3307 adapter->tx_scrq = NULL; 3308 tx_failed: 3309 for (i = 0; i < registered_queues; i++) 3310 release_sub_crq_queue(adapter, allqueues[i], 1); 3311 kfree(allqueues); 3312 return -1; 3313 } 3314 3315 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3316 { 3317 struct device *dev = &adapter->vdev->dev; 3318 union ibmvnic_crq crq; 3319 int max_entries; 3320 3321 if (!retry) { 3322 /* Sub-CRQ entries are 32 byte long */ 3323 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3324 3325 if (adapter->min_tx_entries_per_subcrq > entries_page || 3326 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3327 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3328 return; 3329 } 3330 3331 if (adapter->desired.mtu) 3332 adapter->req_mtu = adapter->desired.mtu; 3333 else 3334 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3335 3336 if (!adapter->desired.tx_entries) 3337 adapter->desired.tx_entries = 3338 adapter->max_tx_entries_per_subcrq; 3339 if (!adapter->desired.rx_entries) 3340 adapter->desired.rx_entries = 3341 adapter->max_rx_add_entries_per_subcrq; 3342 3343 max_entries = IBMVNIC_MAX_LTB_SIZE / 3344 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3345 3346 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3347 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3348 adapter->desired.tx_entries = max_entries; 3349 } 3350 3351 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3352 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3353 adapter->desired.rx_entries = max_entries; 3354 } 3355 3356 if (adapter->desired.tx_entries) 3357 adapter->req_tx_entries_per_subcrq = 3358 adapter->desired.tx_entries; 3359 else 3360 adapter->req_tx_entries_per_subcrq = 3361 adapter->max_tx_entries_per_subcrq; 3362 3363 if (adapter->desired.rx_entries) 3364 adapter->req_rx_add_entries_per_subcrq = 3365 adapter->desired.rx_entries; 3366 else 3367 adapter->req_rx_add_entries_per_subcrq = 3368 adapter->max_rx_add_entries_per_subcrq; 3369 3370 if (adapter->desired.tx_queues) 3371 adapter->req_tx_queues = 3372 adapter->desired.tx_queues; 3373 else 3374 adapter->req_tx_queues = 3375 adapter->opt_tx_comp_sub_queues; 3376 3377 if (adapter->desired.rx_queues) 3378 adapter->req_rx_queues = 3379 adapter->desired.rx_queues; 3380 else 3381 adapter->req_rx_queues = 3382 adapter->opt_rx_comp_queues; 3383 3384 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3385 } 3386 3387 memset(&crq, 0, sizeof(crq)); 3388 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3389 crq.request_capability.cmd = REQUEST_CAPABILITY; 3390 3391 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3392 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3393 atomic_inc(&adapter->running_cap_crqs); 3394 ibmvnic_send_crq(adapter, &crq); 3395 3396 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3397 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3398 atomic_inc(&adapter->running_cap_crqs); 3399 ibmvnic_send_crq(adapter, &crq); 3400 3401 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3402 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3403 atomic_inc(&adapter->running_cap_crqs); 3404 ibmvnic_send_crq(adapter, &crq); 3405 3406 crq.request_capability.capability = 3407 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3408 crq.request_capability.number = 3409 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3410 atomic_inc(&adapter->running_cap_crqs); 3411 ibmvnic_send_crq(adapter, &crq); 3412 3413 crq.request_capability.capability = 3414 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3415 crq.request_capability.number = 3416 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3417 atomic_inc(&adapter->running_cap_crqs); 3418 ibmvnic_send_crq(adapter, &crq); 3419 3420 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3421 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3422 atomic_inc(&adapter->running_cap_crqs); 3423 ibmvnic_send_crq(adapter, &crq); 3424 3425 if (adapter->netdev->flags & IFF_PROMISC) { 3426 if (adapter->promisc_supported) { 3427 crq.request_capability.capability = 3428 cpu_to_be16(PROMISC_REQUESTED); 3429 crq.request_capability.number = cpu_to_be64(1); 3430 atomic_inc(&adapter->running_cap_crqs); 3431 ibmvnic_send_crq(adapter, &crq); 3432 } 3433 } else { 3434 crq.request_capability.capability = 3435 cpu_to_be16(PROMISC_REQUESTED); 3436 crq.request_capability.number = cpu_to_be64(0); 3437 atomic_inc(&adapter->running_cap_crqs); 3438 ibmvnic_send_crq(adapter, &crq); 3439 } 3440 } 3441 3442 static int pending_scrq(struct ibmvnic_adapter *adapter, 3443 struct ibmvnic_sub_crq_queue *scrq) 3444 { 3445 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3446 3447 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3448 return 1; 3449 else 3450 return 0; 3451 } 3452 3453 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3454 struct ibmvnic_sub_crq_queue *scrq) 3455 { 3456 union sub_crq *entry; 3457 unsigned long flags; 3458 3459 spin_lock_irqsave(&scrq->lock, flags); 3460 entry = &scrq->msgs[scrq->cur]; 3461 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3462 if (++scrq->cur == scrq->size) 3463 scrq->cur = 0; 3464 } else { 3465 entry = NULL; 3466 } 3467 spin_unlock_irqrestore(&scrq->lock, flags); 3468 3469 return entry; 3470 } 3471 3472 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3473 { 3474 struct ibmvnic_crq_queue *queue = &adapter->crq; 3475 union ibmvnic_crq *crq; 3476 3477 crq = &queue->msgs[queue->cur]; 3478 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3479 if (++queue->cur == queue->size) 3480 queue->cur = 0; 3481 } else { 3482 crq = NULL; 3483 } 3484 3485 return crq; 3486 } 3487 3488 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3489 { 3490 switch (rc) { 3491 case H_PARAMETER: 3492 dev_warn_ratelimited(dev, 3493 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3494 func, rc); 3495 break; 3496 case H_CLOSED: 3497 dev_warn_ratelimited(dev, 3498 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3499 func, rc); 3500 break; 3501 default: 3502 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3503 break; 3504 } 3505 } 3506 3507 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3508 union sub_crq *sub_crq) 3509 { 3510 unsigned int ua = adapter->vdev->unit_address; 3511 struct device *dev = &adapter->vdev->dev; 3512 u64 *u64_crq = (u64 *)sub_crq; 3513 int rc; 3514 3515 netdev_dbg(adapter->netdev, 3516 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3517 (unsigned long int)cpu_to_be64(remote_handle), 3518 (unsigned long int)cpu_to_be64(u64_crq[0]), 3519 (unsigned long int)cpu_to_be64(u64_crq[1]), 3520 (unsigned long int)cpu_to_be64(u64_crq[2]), 3521 (unsigned long int)cpu_to_be64(u64_crq[3])); 3522 3523 /* Make sure the hypervisor sees the complete request */ 3524 mb(); 3525 3526 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3527 cpu_to_be64(remote_handle), 3528 cpu_to_be64(u64_crq[0]), 3529 cpu_to_be64(u64_crq[1]), 3530 cpu_to_be64(u64_crq[2]), 3531 cpu_to_be64(u64_crq[3])); 3532 3533 if (rc) 3534 print_subcrq_error(dev, rc, __func__); 3535 3536 return rc; 3537 } 3538 3539 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3540 u64 remote_handle, u64 ioba, u64 num_entries) 3541 { 3542 unsigned int ua = adapter->vdev->unit_address; 3543 struct device *dev = &adapter->vdev->dev; 3544 int rc; 3545 3546 /* Make sure the hypervisor sees the complete request */ 3547 mb(); 3548 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3549 cpu_to_be64(remote_handle), 3550 ioba, num_entries); 3551 3552 if (rc) 3553 print_subcrq_error(dev, rc, __func__); 3554 3555 return rc; 3556 } 3557 3558 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3559 union ibmvnic_crq *crq) 3560 { 3561 unsigned int ua = adapter->vdev->unit_address; 3562 struct device *dev = &adapter->vdev->dev; 3563 u64 *u64_crq = (u64 *)crq; 3564 int rc; 3565 3566 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3567 (unsigned long int)cpu_to_be64(u64_crq[0]), 3568 (unsigned long int)cpu_to_be64(u64_crq[1])); 3569 3570 if (!adapter->crq.active && 3571 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3572 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3573 return -EINVAL; 3574 } 3575 3576 /* Make sure the hypervisor sees the complete request */ 3577 mb(); 3578 3579 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3580 cpu_to_be64(u64_crq[0]), 3581 cpu_to_be64(u64_crq[1])); 3582 3583 if (rc) { 3584 if (rc == H_CLOSED) { 3585 dev_warn(dev, "CRQ Queue closed\n"); 3586 if (test_bit(0, &adapter->resetting)) 3587 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3588 } 3589 3590 dev_warn(dev, "Send error (rc=%d)\n", rc); 3591 } 3592 3593 return rc; 3594 } 3595 3596 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3597 { 3598 union ibmvnic_crq crq; 3599 3600 memset(&crq, 0, sizeof(crq)); 3601 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3602 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3603 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3604 3605 return ibmvnic_send_crq(adapter, &crq); 3606 } 3607 3608 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3609 { 3610 union ibmvnic_crq crq; 3611 3612 memset(&crq, 0, sizeof(crq)); 3613 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3614 crq.version_exchange.cmd = VERSION_EXCHANGE; 3615 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3616 3617 return ibmvnic_send_crq(adapter, &crq); 3618 } 3619 3620 struct vnic_login_client_data { 3621 u8 type; 3622 __be16 len; 3623 char name[]; 3624 } __packed; 3625 3626 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3627 { 3628 int len; 3629 3630 /* Calculate the amount of buffer space needed for the 3631 * vnic client data in the login buffer. There are four entries, 3632 * OS name, LPAR name, device name, and a null last entry. 3633 */ 3634 len = 4 * sizeof(struct vnic_login_client_data); 3635 len += 6; /* "Linux" plus NULL */ 3636 len += strlen(utsname()->nodename) + 1; 3637 len += strlen(adapter->netdev->name) + 1; 3638 3639 return len; 3640 } 3641 3642 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3643 struct vnic_login_client_data *vlcd) 3644 { 3645 const char *os_name = "Linux"; 3646 int len; 3647 3648 /* Type 1 - LPAR OS */ 3649 vlcd->type = 1; 3650 len = strlen(os_name) + 1; 3651 vlcd->len = cpu_to_be16(len); 3652 strncpy(vlcd->name, os_name, len); 3653 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3654 3655 /* Type 2 - LPAR name */ 3656 vlcd->type = 2; 3657 len = strlen(utsname()->nodename) + 1; 3658 vlcd->len = cpu_to_be16(len); 3659 strncpy(vlcd->name, utsname()->nodename, len); 3660 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3661 3662 /* Type 3 - device name */ 3663 vlcd->type = 3; 3664 len = strlen(adapter->netdev->name) + 1; 3665 vlcd->len = cpu_to_be16(len); 3666 strncpy(vlcd->name, adapter->netdev->name, len); 3667 } 3668 3669 static int send_login(struct ibmvnic_adapter *adapter) 3670 { 3671 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3672 struct ibmvnic_login_buffer *login_buffer; 3673 struct device *dev = &adapter->vdev->dev; 3674 dma_addr_t rsp_buffer_token; 3675 dma_addr_t buffer_token; 3676 size_t rsp_buffer_size; 3677 union ibmvnic_crq crq; 3678 size_t buffer_size; 3679 __be64 *tx_list_p; 3680 __be64 *rx_list_p; 3681 int client_data_len; 3682 struct vnic_login_client_data *vlcd; 3683 int i; 3684 3685 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3686 netdev_err(adapter->netdev, 3687 "RX or TX queues are not allocated, device login failed\n"); 3688 return -1; 3689 } 3690 3691 release_login_rsp_buffer(adapter); 3692 client_data_len = vnic_client_data_len(adapter); 3693 3694 buffer_size = 3695 sizeof(struct ibmvnic_login_buffer) + 3696 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3697 client_data_len; 3698 3699 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3700 if (!login_buffer) 3701 goto buf_alloc_failed; 3702 3703 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3704 DMA_TO_DEVICE); 3705 if (dma_mapping_error(dev, buffer_token)) { 3706 dev_err(dev, "Couldn't map login buffer\n"); 3707 goto buf_map_failed; 3708 } 3709 3710 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3711 sizeof(u64) * adapter->req_tx_queues + 3712 sizeof(u64) * adapter->req_rx_queues + 3713 sizeof(u64) * adapter->req_rx_queues + 3714 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3715 3716 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3717 if (!login_rsp_buffer) 3718 goto buf_rsp_alloc_failed; 3719 3720 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3721 rsp_buffer_size, DMA_FROM_DEVICE); 3722 if (dma_mapping_error(dev, rsp_buffer_token)) { 3723 dev_err(dev, "Couldn't map login rsp buffer\n"); 3724 goto buf_rsp_map_failed; 3725 } 3726 3727 adapter->login_buf = login_buffer; 3728 adapter->login_buf_token = buffer_token; 3729 adapter->login_buf_sz = buffer_size; 3730 adapter->login_rsp_buf = login_rsp_buffer; 3731 adapter->login_rsp_buf_token = rsp_buffer_token; 3732 adapter->login_rsp_buf_sz = rsp_buffer_size; 3733 3734 login_buffer->len = cpu_to_be32(buffer_size); 3735 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3736 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3737 login_buffer->off_txcomp_subcrqs = 3738 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3739 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3740 login_buffer->off_rxcomp_subcrqs = 3741 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3742 sizeof(u64) * adapter->req_tx_queues); 3743 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3744 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3745 3746 tx_list_p = (__be64 *)((char *)login_buffer + 3747 sizeof(struct ibmvnic_login_buffer)); 3748 rx_list_p = (__be64 *)((char *)login_buffer + 3749 sizeof(struct ibmvnic_login_buffer) + 3750 sizeof(u64) * adapter->req_tx_queues); 3751 3752 for (i = 0; i < adapter->req_tx_queues; i++) { 3753 if (adapter->tx_scrq[i]) { 3754 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3755 crq_num); 3756 } 3757 } 3758 3759 for (i = 0; i < adapter->req_rx_queues; i++) { 3760 if (adapter->rx_scrq[i]) { 3761 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3762 crq_num); 3763 } 3764 } 3765 3766 /* Insert vNIC login client data */ 3767 vlcd = (struct vnic_login_client_data *) 3768 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3769 login_buffer->client_data_offset = 3770 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3771 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3772 3773 vnic_add_client_data(adapter, vlcd); 3774 3775 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3776 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3777 netdev_dbg(adapter->netdev, "%016lx\n", 3778 ((unsigned long int *)(adapter->login_buf))[i]); 3779 } 3780 3781 memset(&crq, 0, sizeof(crq)); 3782 crq.login.first = IBMVNIC_CRQ_CMD; 3783 crq.login.cmd = LOGIN; 3784 crq.login.ioba = cpu_to_be32(buffer_token); 3785 crq.login.len = cpu_to_be32(buffer_size); 3786 ibmvnic_send_crq(adapter, &crq); 3787 3788 return 0; 3789 3790 buf_rsp_map_failed: 3791 kfree(login_rsp_buffer); 3792 buf_rsp_alloc_failed: 3793 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3794 buf_map_failed: 3795 kfree(login_buffer); 3796 buf_alloc_failed: 3797 return -1; 3798 } 3799 3800 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3801 u32 len, u8 map_id) 3802 { 3803 union ibmvnic_crq crq; 3804 3805 memset(&crq, 0, sizeof(crq)); 3806 crq.request_map.first = IBMVNIC_CRQ_CMD; 3807 crq.request_map.cmd = REQUEST_MAP; 3808 crq.request_map.map_id = map_id; 3809 crq.request_map.ioba = cpu_to_be32(addr); 3810 crq.request_map.len = cpu_to_be32(len); 3811 return ibmvnic_send_crq(adapter, &crq); 3812 } 3813 3814 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3815 { 3816 union ibmvnic_crq crq; 3817 3818 memset(&crq, 0, sizeof(crq)); 3819 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3820 crq.request_unmap.cmd = REQUEST_UNMAP; 3821 crq.request_unmap.map_id = map_id; 3822 return ibmvnic_send_crq(adapter, &crq); 3823 } 3824 3825 static void send_map_query(struct ibmvnic_adapter *adapter) 3826 { 3827 union ibmvnic_crq crq; 3828 3829 memset(&crq, 0, sizeof(crq)); 3830 crq.query_map.first = IBMVNIC_CRQ_CMD; 3831 crq.query_map.cmd = QUERY_MAP; 3832 ibmvnic_send_crq(adapter, &crq); 3833 } 3834 3835 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3836 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3837 { 3838 union ibmvnic_crq crq; 3839 3840 atomic_set(&adapter->running_cap_crqs, 0); 3841 memset(&crq, 0, sizeof(crq)); 3842 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3843 crq.query_capability.cmd = QUERY_CAPABILITY; 3844 3845 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3846 atomic_inc(&adapter->running_cap_crqs); 3847 ibmvnic_send_crq(adapter, &crq); 3848 3849 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3850 atomic_inc(&adapter->running_cap_crqs); 3851 ibmvnic_send_crq(adapter, &crq); 3852 3853 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3854 atomic_inc(&adapter->running_cap_crqs); 3855 ibmvnic_send_crq(adapter, &crq); 3856 3857 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3858 atomic_inc(&adapter->running_cap_crqs); 3859 ibmvnic_send_crq(adapter, &crq); 3860 3861 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3862 atomic_inc(&adapter->running_cap_crqs); 3863 ibmvnic_send_crq(adapter, &crq); 3864 3865 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3866 atomic_inc(&adapter->running_cap_crqs); 3867 ibmvnic_send_crq(adapter, &crq); 3868 3869 crq.query_capability.capability = 3870 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3871 atomic_inc(&adapter->running_cap_crqs); 3872 ibmvnic_send_crq(adapter, &crq); 3873 3874 crq.query_capability.capability = 3875 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3876 atomic_inc(&adapter->running_cap_crqs); 3877 ibmvnic_send_crq(adapter, &crq); 3878 3879 crq.query_capability.capability = 3880 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3881 atomic_inc(&adapter->running_cap_crqs); 3882 ibmvnic_send_crq(adapter, &crq); 3883 3884 crq.query_capability.capability = 3885 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3886 atomic_inc(&adapter->running_cap_crqs); 3887 ibmvnic_send_crq(adapter, &crq); 3888 3889 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3890 atomic_inc(&adapter->running_cap_crqs); 3891 ibmvnic_send_crq(adapter, &crq); 3892 3893 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3894 atomic_inc(&adapter->running_cap_crqs); 3895 ibmvnic_send_crq(adapter, &crq); 3896 3897 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3898 atomic_inc(&adapter->running_cap_crqs); 3899 ibmvnic_send_crq(adapter, &crq); 3900 3901 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3902 atomic_inc(&adapter->running_cap_crqs); 3903 ibmvnic_send_crq(adapter, &crq); 3904 3905 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3906 atomic_inc(&adapter->running_cap_crqs); 3907 ibmvnic_send_crq(adapter, &crq); 3908 3909 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3910 atomic_inc(&adapter->running_cap_crqs); 3911 ibmvnic_send_crq(adapter, &crq); 3912 3913 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3914 atomic_inc(&adapter->running_cap_crqs); 3915 ibmvnic_send_crq(adapter, &crq); 3916 3917 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3918 atomic_inc(&adapter->running_cap_crqs); 3919 ibmvnic_send_crq(adapter, &crq); 3920 3921 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3922 atomic_inc(&adapter->running_cap_crqs); 3923 ibmvnic_send_crq(adapter, &crq); 3924 3925 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3926 atomic_inc(&adapter->running_cap_crqs); 3927 ibmvnic_send_crq(adapter, &crq); 3928 3929 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3930 atomic_inc(&adapter->running_cap_crqs); 3931 ibmvnic_send_crq(adapter, &crq); 3932 3933 crq.query_capability.capability = 3934 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3935 atomic_inc(&adapter->running_cap_crqs); 3936 ibmvnic_send_crq(adapter, &crq); 3937 3938 crq.query_capability.capability = 3939 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3940 atomic_inc(&adapter->running_cap_crqs); 3941 ibmvnic_send_crq(adapter, &crq); 3942 3943 crq.query_capability.capability = 3944 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3945 atomic_inc(&adapter->running_cap_crqs); 3946 ibmvnic_send_crq(adapter, &crq); 3947 3948 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3949 atomic_inc(&adapter->running_cap_crqs); 3950 ibmvnic_send_crq(adapter, &crq); 3951 } 3952 3953 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3954 struct ibmvnic_adapter *adapter) 3955 { 3956 struct device *dev = &adapter->vdev->dev; 3957 3958 if (crq->get_vpd_size_rsp.rc.code) { 3959 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3960 crq->get_vpd_size_rsp.rc.code); 3961 complete(&adapter->fw_done); 3962 return; 3963 } 3964 3965 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3966 complete(&adapter->fw_done); 3967 } 3968 3969 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3970 struct ibmvnic_adapter *adapter) 3971 { 3972 struct device *dev = &adapter->vdev->dev; 3973 unsigned char *substr = NULL; 3974 u8 fw_level_len = 0; 3975 3976 memset(adapter->fw_version, 0, 32); 3977 3978 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3979 DMA_FROM_DEVICE); 3980 3981 if (crq->get_vpd_rsp.rc.code) { 3982 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3983 crq->get_vpd_rsp.rc.code); 3984 goto complete; 3985 } 3986 3987 /* get the position of the firmware version info 3988 * located after the ASCII 'RM' substring in the buffer 3989 */ 3990 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3991 if (!substr) { 3992 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3993 goto complete; 3994 } 3995 3996 /* get length of firmware level ASCII substring */ 3997 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3998 fw_level_len = *(substr + 2); 3999 } else { 4000 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 4001 goto complete; 4002 } 4003 4004 /* copy firmware version string from vpd into adapter */ 4005 if ((substr + 3 + fw_level_len) < 4006 (adapter->vpd->buff + adapter->vpd->len)) { 4007 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 4008 } else { 4009 dev_info(dev, "FW substr extrapolated VPD buff\n"); 4010 } 4011 4012 complete: 4013 if (adapter->fw_version[0] == '\0') 4014 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 4015 complete(&adapter->fw_done); 4016 } 4017 4018 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 4019 { 4020 struct device *dev = &adapter->vdev->dev; 4021 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 4022 netdev_features_t old_hw_features = 0; 4023 union ibmvnic_crq crq; 4024 int i; 4025 4026 dma_unmap_single(dev, adapter->ip_offload_tok, 4027 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 4028 4029 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 4030 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 4031 netdev_dbg(adapter->netdev, "%016lx\n", 4032 ((unsigned long int *)(buf))[i]); 4033 4034 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 4035 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 4036 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 4037 buf->tcp_ipv4_chksum); 4038 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 4039 buf->tcp_ipv6_chksum); 4040 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 4041 buf->udp_ipv4_chksum); 4042 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 4043 buf->udp_ipv6_chksum); 4044 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 4045 buf->large_tx_ipv4); 4046 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 4047 buf->large_tx_ipv6); 4048 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 4049 buf->large_rx_ipv4); 4050 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 4051 buf->large_rx_ipv6); 4052 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 4053 buf->max_ipv4_header_size); 4054 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 4055 buf->max_ipv6_header_size); 4056 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 4057 buf->max_tcp_header_size); 4058 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 4059 buf->max_udp_header_size); 4060 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 4061 buf->max_large_tx_size); 4062 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 4063 buf->max_large_rx_size); 4064 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 4065 buf->ipv6_extension_header); 4066 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 4067 buf->tcp_pseudosum_req); 4068 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 4069 buf->num_ipv6_ext_headers); 4070 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 4071 buf->off_ipv6_ext_headers); 4072 4073 adapter->ip_offload_ctrl_tok = 4074 dma_map_single(dev, &adapter->ip_offload_ctrl, 4075 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 4076 4077 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 4078 dev_err(dev, "Couldn't map ip offload control buffer\n"); 4079 return; 4080 } 4081 4082 adapter->ip_offload_ctrl.len = 4083 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4084 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 4085 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 4086 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 4087 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 4088 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 4089 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 4090 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 4091 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 4092 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 4093 4094 /* large_rx disabled for now, additional features needed */ 4095 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 4096 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 4097 4098 if (adapter->state != VNIC_PROBING) { 4099 old_hw_features = adapter->netdev->hw_features; 4100 adapter->netdev->hw_features = 0; 4101 } 4102 4103 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 4104 4105 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 4106 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 4107 4108 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 4109 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 4110 4111 if ((adapter->netdev->features & 4112 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 4113 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 4114 4115 if (buf->large_tx_ipv4) 4116 adapter->netdev->hw_features |= NETIF_F_TSO; 4117 if (buf->large_tx_ipv6) 4118 adapter->netdev->hw_features |= NETIF_F_TSO6; 4119 4120 if (adapter->state == VNIC_PROBING) { 4121 adapter->netdev->features |= adapter->netdev->hw_features; 4122 } else if (old_hw_features != adapter->netdev->hw_features) { 4123 netdev_features_t tmp = 0; 4124 4125 /* disable features no longer supported */ 4126 adapter->netdev->features &= adapter->netdev->hw_features; 4127 /* turn on features now supported if previously enabled */ 4128 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 4129 adapter->netdev->hw_features; 4130 adapter->netdev->features |= 4131 tmp & adapter->netdev->wanted_features; 4132 } 4133 4134 memset(&crq, 0, sizeof(crq)); 4135 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 4136 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 4137 crq.control_ip_offload.len = 4138 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 4139 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 4140 ibmvnic_send_crq(adapter, &crq); 4141 } 4142 4143 static const char *ibmvnic_fw_err_cause(u16 cause) 4144 { 4145 switch (cause) { 4146 case ADAPTER_PROBLEM: 4147 return "adapter problem"; 4148 case BUS_PROBLEM: 4149 return "bus problem"; 4150 case FW_PROBLEM: 4151 return "firmware problem"; 4152 case DD_PROBLEM: 4153 return "device driver problem"; 4154 case EEH_RECOVERY: 4155 return "EEH recovery"; 4156 case FW_UPDATED: 4157 return "firmware updated"; 4158 case LOW_MEMORY: 4159 return "low Memory"; 4160 default: 4161 return "unknown"; 4162 } 4163 } 4164 4165 static void handle_error_indication(union ibmvnic_crq *crq, 4166 struct ibmvnic_adapter *adapter) 4167 { 4168 struct device *dev = &adapter->vdev->dev; 4169 u16 cause; 4170 4171 cause = be16_to_cpu(crq->error_indication.error_cause); 4172 4173 dev_warn_ratelimited(dev, 4174 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4175 crq->error_indication.flags 4176 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4177 ibmvnic_fw_err_cause(cause)); 4178 4179 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4180 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4181 else 4182 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4183 } 4184 4185 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4186 struct ibmvnic_adapter *adapter) 4187 { 4188 struct net_device *netdev = adapter->netdev; 4189 struct device *dev = &adapter->vdev->dev; 4190 long rc; 4191 4192 rc = crq->change_mac_addr_rsp.rc.code; 4193 if (rc) { 4194 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4195 goto out; 4196 } 4197 ether_addr_copy(netdev->dev_addr, 4198 &crq->change_mac_addr_rsp.mac_addr[0]); 4199 out: 4200 complete(&adapter->fw_done); 4201 return rc; 4202 } 4203 4204 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4205 struct ibmvnic_adapter *adapter) 4206 { 4207 struct device *dev = &adapter->vdev->dev; 4208 u64 *req_value; 4209 char *name; 4210 4211 atomic_dec(&adapter->running_cap_crqs); 4212 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4213 case REQ_TX_QUEUES: 4214 req_value = &adapter->req_tx_queues; 4215 name = "tx"; 4216 break; 4217 case REQ_RX_QUEUES: 4218 req_value = &adapter->req_rx_queues; 4219 name = "rx"; 4220 break; 4221 case REQ_RX_ADD_QUEUES: 4222 req_value = &adapter->req_rx_add_queues; 4223 name = "rx_add"; 4224 break; 4225 case REQ_TX_ENTRIES_PER_SUBCRQ: 4226 req_value = &adapter->req_tx_entries_per_subcrq; 4227 name = "tx_entries_per_subcrq"; 4228 break; 4229 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4230 req_value = &adapter->req_rx_add_entries_per_subcrq; 4231 name = "rx_add_entries_per_subcrq"; 4232 break; 4233 case REQ_MTU: 4234 req_value = &adapter->req_mtu; 4235 name = "mtu"; 4236 break; 4237 case PROMISC_REQUESTED: 4238 req_value = &adapter->promisc; 4239 name = "promisc"; 4240 break; 4241 default: 4242 dev_err(dev, "Got invalid cap request rsp %d\n", 4243 crq->request_capability.capability); 4244 return; 4245 } 4246 4247 switch (crq->request_capability_rsp.rc.code) { 4248 case SUCCESS: 4249 break; 4250 case PARTIALSUCCESS: 4251 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4252 *req_value, 4253 (long int)be64_to_cpu(crq->request_capability_rsp. 4254 number), name); 4255 4256 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4257 REQ_MTU) { 4258 pr_err("mtu of %llu is not supported. Reverting.\n", 4259 *req_value); 4260 *req_value = adapter->fallback.mtu; 4261 } else { 4262 *req_value = 4263 be64_to_cpu(crq->request_capability_rsp.number); 4264 } 4265 4266 ibmvnic_send_req_caps(adapter, 1); 4267 return; 4268 default: 4269 dev_err(dev, "Error %d in request cap rsp\n", 4270 crq->request_capability_rsp.rc.code); 4271 return; 4272 } 4273 4274 /* Done receiving requested capabilities, query IP offload support */ 4275 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4276 union ibmvnic_crq newcrq; 4277 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4278 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4279 &adapter->ip_offload_buf; 4280 4281 adapter->wait_capability = false; 4282 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4283 buf_sz, 4284 DMA_FROM_DEVICE); 4285 4286 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4287 if (!firmware_has_feature(FW_FEATURE_CMO)) 4288 dev_err(dev, "Couldn't map offload buffer\n"); 4289 return; 4290 } 4291 4292 memset(&newcrq, 0, sizeof(newcrq)); 4293 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4294 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4295 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4296 newcrq.query_ip_offload.ioba = 4297 cpu_to_be32(adapter->ip_offload_tok); 4298 4299 ibmvnic_send_crq(adapter, &newcrq); 4300 } 4301 } 4302 4303 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4304 struct ibmvnic_adapter *adapter) 4305 { 4306 struct device *dev = &adapter->vdev->dev; 4307 struct net_device *netdev = adapter->netdev; 4308 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4309 struct ibmvnic_login_buffer *login = adapter->login_buf; 4310 int i; 4311 4312 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4313 DMA_TO_DEVICE); 4314 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4315 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4316 4317 /* If the number of queues requested can't be allocated by the 4318 * server, the login response will return with code 1. We will need 4319 * to resend the login buffer with fewer queues requested. 4320 */ 4321 if (login_rsp_crq->generic.rc.code) { 4322 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4323 complete(&adapter->init_done); 4324 return 0; 4325 } 4326 4327 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4328 4329 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4330 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4331 netdev_dbg(adapter->netdev, "%016lx\n", 4332 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4333 } 4334 4335 /* Sanity checks */ 4336 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4337 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4338 adapter->req_rx_add_queues != 4339 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4340 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4341 ibmvnic_remove(adapter->vdev); 4342 return -EIO; 4343 } 4344 release_login_buffer(adapter); 4345 complete(&adapter->init_done); 4346 4347 return 0; 4348 } 4349 4350 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4351 struct ibmvnic_adapter *adapter) 4352 { 4353 struct device *dev = &adapter->vdev->dev; 4354 long rc; 4355 4356 rc = crq->request_unmap_rsp.rc.code; 4357 if (rc) 4358 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4359 } 4360 4361 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4362 struct ibmvnic_adapter *adapter) 4363 { 4364 struct net_device *netdev = adapter->netdev; 4365 struct device *dev = &adapter->vdev->dev; 4366 long rc; 4367 4368 rc = crq->query_map_rsp.rc.code; 4369 if (rc) { 4370 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4371 return; 4372 } 4373 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4374 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4375 crq->query_map_rsp.free_pages); 4376 } 4377 4378 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4379 struct ibmvnic_adapter *adapter) 4380 { 4381 struct net_device *netdev = adapter->netdev; 4382 struct device *dev = &adapter->vdev->dev; 4383 long rc; 4384 4385 atomic_dec(&adapter->running_cap_crqs); 4386 netdev_dbg(netdev, "Outstanding queries: %d\n", 4387 atomic_read(&adapter->running_cap_crqs)); 4388 rc = crq->query_capability.rc.code; 4389 if (rc) { 4390 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4391 goto out; 4392 } 4393 4394 switch (be16_to_cpu(crq->query_capability.capability)) { 4395 case MIN_TX_QUEUES: 4396 adapter->min_tx_queues = 4397 be64_to_cpu(crq->query_capability.number); 4398 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4399 adapter->min_tx_queues); 4400 break; 4401 case MIN_RX_QUEUES: 4402 adapter->min_rx_queues = 4403 be64_to_cpu(crq->query_capability.number); 4404 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4405 adapter->min_rx_queues); 4406 break; 4407 case MIN_RX_ADD_QUEUES: 4408 adapter->min_rx_add_queues = 4409 be64_to_cpu(crq->query_capability.number); 4410 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4411 adapter->min_rx_add_queues); 4412 break; 4413 case MAX_TX_QUEUES: 4414 adapter->max_tx_queues = 4415 be64_to_cpu(crq->query_capability.number); 4416 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4417 adapter->max_tx_queues); 4418 break; 4419 case MAX_RX_QUEUES: 4420 adapter->max_rx_queues = 4421 be64_to_cpu(crq->query_capability.number); 4422 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4423 adapter->max_rx_queues); 4424 break; 4425 case MAX_RX_ADD_QUEUES: 4426 adapter->max_rx_add_queues = 4427 be64_to_cpu(crq->query_capability.number); 4428 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4429 adapter->max_rx_add_queues); 4430 break; 4431 case MIN_TX_ENTRIES_PER_SUBCRQ: 4432 adapter->min_tx_entries_per_subcrq = 4433 be64_to_cpu(crq->query_capability.number); 4434 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4435 adapter->min_tx_entries_per_subcrq); 4436 break; 4437 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4438 adapter->min_rx_add_entries_per_subcrq = 4439 be64_to_cpu(crq->query_capability.number); 4440 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4441 adapter->min_rx_add_entries_per_subcrq); 4442 break; 4443 case MAX_TX_ENTRIES_PER_SUBCRQ: 4444 adapter->max_tx_entries_per_subcrq = 4445 be64_to_cpu(crq->query_capability.number); 4446 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4447 adapter->max_tx_entries_per_subcrq); 4448 break; 4449 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4450 adapter->max_rx_add_entries_per_subcrq = 4451 be64_to_cpu(crq->query_capability.number); 4452 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4453 adapter->max_rx_add_entries_per_subcrq); 4454 break; 4455 case TCP_IP_OFFLOAD: 4456 adapter->tcp_ip_offload = 4457 be64_to_cpu(crq->query_capability.number); 4458 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4459 adapter->tcp_ip_offload); 4460 break; 4461 case PROMISC_SUPPORTED: 4462 adapter->promisc_supported = 4463 be64_to_cpu(crq->query_capability.number); 4464 netdev_dbg(netdev, "promisc_supported = %lld\n", 4465 adapter->promisc_supported); 4466 break; 4467 case MIN_MTU: 4468 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4469 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4470 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4471 break; 4472 case MAX_MTU: 4473 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4474 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4475 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4476 break; 4477 case MAX_MULTICAST_FILTERS: 4478 adapter->max_multicast_filters = 4479 be64_to_cpu(crq->query_capability.number); 4480 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4481 adapter->max_multicast_filters); 4482 break; 4483 case VLAN_HEADER_INSERTION: 4484 adapter->vlan_header_insertion = 4485 be64_to_cpu(crq->query_capability.number); 4486 if (adapter->vlan_header_insertion) 4487 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4488 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4489 adapter->vlan_header_insertion); 4490 break; 4491 case RX_VLAN_HEADER_INSERTION: 4492 adapter->rx_vlan_header_insertion = 4493 be64_to_cpu(crq->query_capability.number); 4494 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4495 adapter->rx_vlan_header_insertion); 4496 break; 4497 case MAX_TX_SG_ENTRIES: 4498 adapter->max_tx_sg_entries = 4499 be64_to_cpu(crq->query_capability.number); 4500 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4501 adapter->max_tx_sg_entries); 4502 break; 4503 case RX_SG_SUPPORTED: 4504 adapter->rx_sg_supported = 4505 be64_to_cpu(crq->query_capability.number); 4506 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4507 adapter->rx_sg_supported); 4508 break; 4509 case OPT_TX_COMP_SUB_QUEUES: 4510 adapter->opt_tx_comp_sub_queues = 4511 be64_to_cpu(crq->query_capability.number); 4512 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4513 adapter->opt_tx_comp_sub_queues); 4514 break; 4515 case OPT_RX_COMP_QUEUES: 4516 adapter->opt_rx_comp_queues = 4517 be64_to_cpu(crq->query_capability.number); 4518 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4519 adapter->opt_rx_comp_queues); 4520 break; 4521 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4522 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4523 be64_to_cpu(crq->query_capability.number); 4524 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4525 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4526 break; 4527 case OPT_TX_ENTRIES_PER_SUBCRQ: 4528 adapter->opt_tx_entries_per_subcrq = 4529 be64_to_cpu(crq->query_capability.number); 4530 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4531 adapter->opt_tx_entries_per_subcrq); 4532 break; 4533 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4534 adapter->opt_rxba_entries_per_subcrq = 4535 be64_to_cpu(crq->query_capability.number); 4536 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4537 adapter->opt_rxba_entries_per_subcrq); 4538 break; 4539 case TX_RX_DESC_REQ: 4540 adapter->tx_rx_desc_req = crq->query_capability.number; 4541 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4542 adapter->tx_rx_desc_req); 4543 break; 4544 4545 default: 4546 netdev_err(netdev, "Got invalid cap rsp %d\n", 4547 crq->query_capability.capability); 4548 } 4549 4550 out: 4551 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4552 adapter->wait_capability = false; 4553 ibmvnic_send_req_caps(adapter, 0); 4554 } 4555 } 4556 4557 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4558 { 4559 union ibmvnic_crq crq; 4560 int rc; 4561 4562 memset(&crq, 0, sizeof(crq)); 4563 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4564 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4565 4566 mutex_lock(&adapter->fw_lock); 4567 adapter->fw_done_rc = 0; 4568 reinit_completion(&adapter->fw_done); 4569 4570 rc = ibmvnic_send_crq(adapter, &crq); 4571 if (rc) { 4572 mutex_unlock(&adapter->fw_lock); 4573 return rc; 4574 } 4575 4576 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 4577 if (rc) { 4578 mutex_unlock(&adapter->fw_lock); 4579 return rc; 4580 } 4581 4582 mutex_unlock(&adapter->fw_lock); 4583 return adapter->fw_done_rc ? -EIO : 0; 4584 } 4585 4586 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4587 struct ibmvnic_adapter *adapter) 4588 { 4589 struct net_device *netdev = adapter->netdev; 4590 int rc; 4591 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4592 4593 rc = crq->query_phys_parms_rsp.rc.code; 4594 if (rc) { 4595 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4596 return rc; 4597 } 4598 switch (rspeed) { 4599 case IBMVNIC_10MBPS: 4600 adapter->speed = SPEED_10; 4601 break; 4602 case IBMVNIC_100MBPS: 4603 adapter->speed = SPEED_100; 4604 break; 4605 case IBMVNIC_1GBPS: 4606 adapter->speed = SPEED_1000; 4607 break; 4608 case IBMVNIC_10GBP: 4609 adapter->speed = SPEED_10000; 4610 break; 4611 case IBMVNIC_25GBPS: 4612 adapter->speed = SPEED_25000; 4613 break; 4614 case IBMVNIC_40GBPS: 4615 adapter->speed = SPEED_40000; 4616 break; 4617 case IBMVNIC_50GBPS: 4618 adapter->speed = SPEED_50000; 4619 break; 4620 case IBMVNIC_100GBPS: 4621 adapter->speed = SPEED_100000; 4622 break; 4623 default: 4624 if (netif_carrier_ok(netdev)) 4625 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4626 adapter->speed = SPEED_UNKNOWN; 4627 } 4628 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4629 adapter->duplex = DUPLEX_FULL; 4630 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4631 adapter->duplex = DUPLEX_HALF; 4632 else 4633 adapter->duplex = DUPLEX_UNKNOWN; 4634 4635 return rc; 4636 } 4637 4638 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4639 struct ibmvnic_adapter *adapter) 4640 { 4641 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4642 struct net_device *netdev = adapter->netdev; 4643 struct device *dev = &adapter->vdev->dev; 4644 u64 *u64_crq = (u64 *)crq; 4645 long rc; 4646 4647 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4648 (unsigned long int)cpu_to_be64(u64_crq[0]), 4649 (unsigned long int)cpu_to_be64(u64_crq[1])); 4650 switch (gen_crq->first) { 4651 case IBMVNIC_CRQ_INIT_RSP: 4652 switch (gen_crq->cmd) { 4653 case IBMVNIC_CRQ_INIT: 4654 dev_info(dev, "Partner initialized\n"); 4655 adapter->from_passive_init = true; 4656 adapter->failover_pending = false; 4657 if (!completion_done(&adapter->init_done)) { 4658 complete(&adapter->init_done); 4659 adapter->init_done_rc = -EIO; 4660 } 4661 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4662 break; 4663 case IBMVNIC_CRQ_INIT_COMPLETE: 4664 dev_info(dev, "Partner initialization complete\n"); 4665 adapter->crq.active = true; 4666 send_version_xchg(adapter); 4667 break; 4668 default: 4669 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4670 } 4671 return; 4672 case IBMVNIC_CRQ_XPORT_EVENT: 4673 netif_carrier_off(netdev); 4674 adapter->crq.active = false; 4675 /* terminate any thread waiting for a response 4676 * from the device 4677 */ 4678 if (!completion_done(&adapter->fw_done)) { 4679 adapter->fw_done_rc = -EIO; 4680 complete(&adapter->fw_done); 4681 } 4682 if (!completion_done(&adapter->stats_done)) 4683 complete(&adapter->stats_done); 4684 if (test_bit(0, &adapter->resetting)) 4685 adapter->force_reset_recovery = true; 4686 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4687 dev_info(dev, "Migrated, re-enabling adapter\n"); 4688 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4689 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4690 dev_info(dev, "Backing device failover detected\n"); 4691 adapter->failover_pending = true; 4692 } else { 4693 /* The adapter lost the connection */ 4694 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4695 gen_crq->cmd); 4696 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4697 } 4698 return; 4699 case IBMVNIC_CRQ_CMD_RSP: 4700 break; 4701 default: 4702 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4703 gen_crq->first); 4704 return; 4705 } 4706 4707 switch (gen_crq->cmd) { 4708 case VERSION_EXCHANGE_RSP: 4709 rc = crq->version_exchange_rsp.rc.code; 4710 if (rc) { 4711 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4712 break; 4713 } 4714 ibmvnic_version = 4715 be16_to_cpu(crq->version_exchange_rsp.version); 4716 dev_info(dev, "Partner protocol version is %d\n", 4717 ibmvnic_version); 4718 send_cap_queries(adapter); 4719 break; 4720 case QUERY_CAPABILITY_RSP: 4721 handle_query_cap_rsp(crq, adapter); 4722 break; 4723 case QUERY_MAP_RSP: 4724 handle_query_map_rsp(crq, adapter); 4725 break; 4726 case REQUEST_MAP_RSP: 4727 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4728 complete(&adapter->fw_done); 4729 break; 4730 case REQUEST_UNMAP_RSP: 4731 handle_request_unmap_rsp(crq, adapter); 4732 break; 4733 case REQUEST_CAPABILITY_RSP: 4734 handle_request_cap_rsp(crq, adapter); 4735 break; 4736 case LOGIN_RSP: 4737 netdev_dbg(netdev, "Got Login Response\n"); 4738 handle_login_rsp(crq, adapter); 4739 break; 4740 case LOGICAL_LINK_STATE_RSP: 4741 netdev_dbg(netdev, 4742 "Got Logical Link State Response, state: %d rc: %d\n", 4743 crq->logical_link_state_rsp.link_state, 4744 crq->logical_link_state_rsp.rc.code); 4745 adapter->logical_link_state = 4746 crq->logical_link_state_rsp.link_state; 4747 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4748 complete(&adapter->init_done); 4749 break; 4750 case LINK_STATE_INDICATION: 4751 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4752 adapter->phys_link_state = 4753 crq->link_state_indication.phys_link_state; 4754 adapter->logical_link_state = 4755 crq->link_state_indication.logical_link_state; 4756 if (adapter->phys_link_state && adapter->logical_link_state) 4757 netif_carrier_on(netdev); 4758 else 4759 netif_carrier_off(netdev); 4760 break; 4761 case CHANGE_MAC_ADDR_RSP: 4762 netdev_dbg(netdev, "Got MAC address change Response\n"); 4763 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4764 break; 4765 case ERROR_INDICATION: 4766 netdev_dbg(netdev, "Got Error Indication\n"); 4767 handle_error_indication(crq, adapter); 4768 break; 4769 case REQUEST_STATISTICS_RSP: 4770 netdev_dbg(netdev, "Got Statistics Response\n"); 4771 complete(&adapter->stats_done); 4772 break; 4773 case QUERY_IP_OFFLOAD_RSP: 4774 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4775 handle_query_ip_offload_rsp(adapter); 4776 break; 4777 case MULTICAST_CTRL_RSP: 4778 netdev_dbg(netdev, "Got multicast control Response\n"); 4779 break; 4780 case CONTROL_IP_OFFLOAD_RSP: 4781 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4782 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4783 sizeof(adapter->ip_offload_ctrl), 4784 DMA_TO_DEVICE); 4785 complete(&adapter->init_done); 4786 break; 4787 case COLLECT_FW_TRACE_RSP: 4788 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4789 complete(&adapter->fw_done); 4790 break; 4791 case GET_VPD_SIZE_RSP: 4792 handle_vpd_size_rsp(crq, adapter); 4793 break; 4794 case GET_VPD_RSP: 4795 handle_vpd_rsp(crq, adapter); 4796 break; 4797 case QUERY_PHYS_PARMS_RSP: 4798 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4799 complete(&adapter->fw_done); 4800 break; 4801 default: 4802 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4803 gen_crq->cmd); 4804 } 4805 } 4806 4807 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4808 { 4809 struct ibmvnic_adapter *adapter = instance; 4810 4811 tasklet_schedule(&adapter->tasklet); 4812 return IRQ_HANDLED; 4813 } 4814 4815 static void ibmvnic_tasklet(void *data) 4816 { 4817 struct ibmvnic_adapter *adapter = data; 4818 struct ibmvnic_crq_queue *queue = &adapter->crq; 4819 union ibmvnic_crq *crq; 4820 unsigned long flags; 4821 bool done = false; 4822 4823 spin_lock_irqsave(&queue->lock, flags); 4824 while (!done) { 4825 /* Pull all the valid messages off the CRQ */ 4826 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4827 ibmvnic_handle_crq(crq, adapter); 4828 crq->generic.first = 0; 4829 } 4830 4831 /* remain in tasklet until all 4832 * capabilities responses are received 4833 */ 4834 if (!adapter->wait_capability) 4835 done = true; 4836 } 4837 /* if capabilities CRQ's were sent in this tasklet, the following 4838 * tasklet must wait until all responses are received 4839 */ 4840 if (atomic_read(&adapter->running_cap_crqs) != 0) 4841 adapter->wait_capability = true; 4842 spin_unlock_irqrestore(&queue->lock, flags); 4843 } 4844 4845 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4846 { 4847 struct vio_dev *vdev = adapter->vdev; 4848 int rc; 4849 4850 do { 4851 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4852 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4853 4854 if (rc) 4855 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4856 4857 return rc; 4858 } 4859 4860 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4861 { 4862 struct ibmvnic_crq_queue *crq = &adapter->crq; 4863 struct device *dev = &adapter->vdev->dev; 4864 struct vio_dev *vdev = adapter->vdev; 4865 int rc; 4866 4867 /* Close the CRQ */ 4868 do { 4869 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4870 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4871 4872 /* Clean out the queue */ 4873 memset(crq->msgs, 0, PAGE_SIZE); 4874 crq->cur = 0; 4875 crq->active = false; 4876 4877 /* And re-open it again */ 4878 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4879 crq->msg_token, PAGE_SIZE); 4880 4881 if (rc == H_CLOSED) 4882 /* Adapter is good, but other end is not ready */ 4883 dev_warn(dev, "Partner adapter not ready\n"); 4884 else if (rc != 0) 4885 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4886 4887 return rc; 4888 } 4889 4890 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4891 { 4892 struct ibmvnic_crq_queue *crq = &adapter->crq; 4893 struct vio_dev *vdev = adapter->vdev; 4894 long rc; 4895 4896 if (!crq->msgs) 4897 return; 4898 4899 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4900 free_irq(vdev->irq, adapter); 4901 tasklet_kill(&adapter->tasklet); 4902 do { 4903 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4904 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4905 4906 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4907 DMA_BIDIRECTIONAL); 4908 free_page((unsigned long)crq->msgs); 4909 crq->msgs = NULL; 4910 crq->active = false; 4911 } 4912 4913 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4914 { 4915 struct ibmvnic_crq_queue *crq = &adapter->crq; 4916 struct device *dev = &adapter->vdev->dev; 4917 struct vio_dev *vdev = adapter->vdev; 4918 int rc, retrc = -ENOMEM; 4919 4920 if (crq->msgs) 4921 return 0; 4922 4923 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4924 /* Should we allocate more than one page? */ 4925 4926 if (!crq->msgs) 4927 return -ENOMEM; 4928 4929 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4930 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4931 DMA_BIDIRECTIONAL); 4932 if (dma_mapping_error(dev, crq->msg_token)) 4933 goto map_failed; 4934 4935 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4936 crq->msg_token, PAGE_SIZE); 4937 4938 if (rc == H_RESOURCE) 4939 /* maybe kexecing and resource is busy. try a reset */ 4940 rc = ibmvnic_reset_crq(adapter); 4941 retrc = rc; 4942 4943 if (rc == H_CLOSED) { 4944 dev_warn(dev, "Partner adapter not ready\n"); 4945 } else if (rc) { 4946 dev_warn(dev, "Error %d opening adapter\n", rc); 4947 goto reg_crq_failed; 4948 } 4949 4950 retrc = 0; 4951 4952 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4953 (unsigned long)adapter); 4954 4955 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4956 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 4957 adapter->vdev->unit_address); 4958 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 4959 if (rc) { 4960 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4961 vdev->irq, rc); 4962 goto req_irq_failed; 4963 } 4964 4965 rc = vio_enable_interrupts(vdev); 4966 if (rc) { 4967 dev_err(dev, "Error %d enabling interrupts\n", rc); 4968 goto req_irq_failed; 4969 } 4970 4971 crq->cur = 0; 4972 spin_lock_init(&crq->lock); 4973 4974 return retrc; 4975 4976 req_irq_failed: 4977 tasklet_kill(&adapter->tasklet); 4978 do { 4979 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4980 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4981 reg_crq_failed: 4982 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4983 map_failed: 4984 free_page((unsigned long)crq->msgs); 4985 crq->msgs = NULL; 4986 return retrc; 4987 } 4988 4989 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4990 { 4991 struct device *dev = &adapter->vdev->dev; 4992 unsigned long timeout = msecs_to_jiffies(30000); 4993 u64 old_num_rx_queues, old_num_tx_queues; 4994 int rc; 4995 4996 adapter->from_passive_init = false; 4997 4998 old_num_rx_queues = adapter->req_rx_queues; 4999 old_num_tx_queues = adapter->req_tx_queues; 5000 5001 reinit_completion(&adapter->init_done); 5002 adapter->init_done_rc = 0; 5003 ibmvnic_send_crq_init(adapter); 5004 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5005 dev_err(dev, "Initialization sequence timed out\n"); 5006 return -1; 5007 } 5008 5009 if (adapter->init_done_rc) { 5010 release_crq_queue(adapter); 5011 return adapter->init_done_rc; 5012 } 5013 5014 if (adapter->from_passive_init) { 5015 adapter->state = VNIC_OPEN; 5016 adapter->from_passive_init = false; 5017 return -1; 5018 } 5019 5020 if (test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 5021 adapter->reset_reason != VNIC_RESET_MOBILITY) { 5022 if (adapter->req_rx_queues != old_num_rx_queues || 5023 adapter->req_tx_queues != old_num_tx_queues) { 5024 release_sub_crqs(adapter, 0); 5025 rc = init_sub_crqs(adapter); 5026 } else { 5027 rc = reset_sub_crq_queues(adapter); 5028 } 5029 } else { 5030 rc = init_sub_crqs(adapter); 5031 } 5032 5033 if (rc) { 5034 dev_err(dev, "Initialization of sub crqs failed\n"); 5035 release_crq_queue(adapter); 5036 return rc; 5037 } 5038 5039 rc = init_sub_crq_irqs(adapter); 5040 if (rc) { 5041 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5042 release_crq_queue(adapter); 5043 } 5044 5045 return rc; 5046 } 5047 5048 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 5049 { 5050 struct device *dev = &adapter->vdev->dev; 5051 unsigned long timeout = msecs_to_jiffies(30000); 5052 int rc; 5053 5054 adapter->from_passive_init = false; 5055 5056 adapter->init_done_rc = 0; 5057 ibmvnic_send_crq_init(adapter); 5058 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 5059 dev_err(dev, "Initialization sequence timed out\n"); 5060 return -1; 5061 } 5062 5063 if (adapter->init_done_rc) { 5064 release_crq_queue(adapter); 5065 return adapter->init_done_rc; 5066 } 5067 5068 if (adapter->from_passive_init) { 5069 adapter->state = VNIC_OPEN; 5070 adapter->from_passive_init = false; 5071 return -1; 5072 } 5073 5074 rc = init_sub_crqs(adapter); 5075 if (rc) { 5076 dev_err(dev, "Initialization of sub crqs failed\n"); 5077 release_crq_queue(adapter); 5078 return rc; 5079 } 5080 5081 rc = init_sub_crq_irqs(adapter); 5082 if (rc) { 5083 dev_err(dev, "Failed to initialize sub crq irqs\n"); 5084 release_crq_queue(adapter); 5085 } 5086 5087 return rc; 5088 } 5089 5090 static struct device_attribute dev_attr_failover; 5091 5092 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 5093 { 5094 struct ibmvnic_adapter *adapter; 5095 struct net_device *netdev; 5096 unsigned char *mac_addr_p; 5097 int rc; 5098 5099 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 5100 dev->unit_address); 5101 5102 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 5103 VETH_MAC_ADDR, NULL); 5104 if (!mac_addr_p) { 5105 dev_err(&dev->dev, 5106 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 5107 __FILE__, __LINE__); 5108 return 0; 5109 } 5110 5111 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 5112 IBMVNIC_MAX_QUEUES); 5113 if (!netdev) 5114 return -ENOMEM; 5115 5116 adapter = netdev_priv(netdev); 5117 adapter->state = VNIC_PROBING; 5118 dev_set_drvdata(&dev->dev, netdev); 5119 adapter->vdev = dev; 5120 adapter->netdev = netdev; 5121 5122 ether_addr_copy(adapter->mac_addr, mac_addr_p); 5123 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 5124 netdev->irq = dev->irq; 5125 netdev->netdev_ops = &ibmvnic_netdev_ops; 5126 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 5127 SET_NETDEV_DEV(netdev, &dev->dev); 5128 5129 spin_lock_init(&adapter->stats_lock); 5130 5131 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 5132 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 5133 __ibmvnic_delayed_reset); 5134 INIT_LIST_HEAD(&adapter->rwi_list); 5135 spin_lock_init(&adapter->rwi_lock); 5136 spin_lock_init(&adapter->state_lock); 5137 mutex_init(&adapter->fw_lock); 5138 init_completion(&adapter->init_done); 5139 init_completion(&adapter->fw_done); 5140 init_completion(&adapter->reset_done); 5141 init_completion(&adapter->stats_done); 5142 clear_bit(0, &adapter->resetting); 5143 5144 do { 5145 rc = init_crq_queue(adapter); 5146 if (rc) { 5147 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 5148 rc); 5149 goto ibmvnic_init_fail; 5150 } 5151 5152 rc = ibmvnic_init(adapter); 5153 if (rc && rc != EAGAIN) 5154 goto ibmvnic_init_fail; 5155 } while (rc == EAGAIN); 5156 5157 rc = init_stats_buffers(adapter); 5158 if (rc) 5159 goto ibmvnic_init_fail; 5160 5161 rc = init_stats_token(adapter); 5162 if (rc) 5163 goto ibmvnic_stats_fail; 5164 5165 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5166 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5167 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5168 5169 rc = device_create_file(&dev->dev, &dev_attr_failover); 5170 if (rc) 5171 goto ibmvnic_dev_file_err; 5172 5173 netif_carrier_off(netdev); 5174 rc = register_netdev(netdev); 5175 if (rc) { 5176 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 5177 goto ibmvnic_register_fail; 5178 } 5179 dev_info(&dev->dev, "ibmvnic registered\n"); 5180 5181 adapter->state = VNIC_PROBED; 5182 5183 adapter->wait_for_reset = false; 5184 5185 return 0; 5186 5187 ibmvnic_register_fail: 5188 device_remove_file(&dev->dev, &dev_attr_failover); 5189 5190 ibmvnic_dev_file_err: 5191 release_stats_token(adapter); 5192 5193 ibmvnic_stats_fail: 5194 release_stats_buffers(adapter); 5195 5196 ibmvnic_init_fail: 5197 release_sub_crqs(adapter, 1); 5198 release_crq_queue(adapter); 5199 mutex_destroy(&adapter->fw_lock); 5200 free_netdev(netdev); 5201 5202 return rc; 5203 } 5204 5205 static int ibmvnic_remove(struct vio_dev *dev) 5206 { 5207 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5208 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5209 unsigned long flags; 5210 5211 spin_lock_irqsave(&adapter->state_lock, flags); 5212 if (adapter->state == VNIC_RESETTING) { 5213 spin_unlock_irqrestore(&adapter->state_lock, flags); 5214 return -EBUSY; 5215 } 5216 5217 adapter->state = VNIC_REMOVING; 5218 spin_unlock_irqrestore(&adapter->state_lock, flags); 5219 5220 flush_work(&adapter->ibmvnic_reset); 5221 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 5222 5223 rtnl_lock(); 5224 unregister_netdevice(netdev); 5225 5226 release_resources(adapter); 5227 release_sub_crqs(adapter, 1); 5228 release_crq_queue(adapter); 5229 5230 release_stats_token(adapter); 5231 release_stats_buffers(adapter); 5232 5233 adapter->state = VNIC_REMOVED; 5234 5235 rtnl_unlock(); 5236 mutex_destroy(&adapter->fw_lock); 5237 device_remove_file(&dev->dev, &dev_attr_failover); 5238 free_netdev(netdev); 5239 dev_set_drvdata(&dev->dev, NULL); 5240 5241 return 0; 5242 } 5243 5244 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5245 const char *buf, size_t count) 5246 { 5247 struct net_device *netdev = dev_get_drvdata(dev); 5248 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5249 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5250 __be64 session_token; 5251 long rc; 5252 5253 if (!sysfs_streq(buf, "1")) 5254 return -EINVAL; 5255 5256 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5257 H_GET_SESSION_TOKEN, 0, 0, 0); 5258 if (rc) { 5259 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5260 rc); 5261 return -EINVAL; 5262 } 5263 5264 session_token = (__be64)retbuf[0]; 5265 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5266 be64_to_cpu(session_token)); 5267 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5268 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5269 if (rc) { 5270 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5271 rc); 5272 return -EINVAL; 5273 } 5274 5275 return count; 5276 } 5277 5278 static DEVICE_ATTR_WO(failover); 5279 5280 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5281 { 5282 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5283 struct ibmvnic_adapter *adapter; 5284 struct iommu_table *tbl; 5285 unsigned long ret = 0; 5286 int i; 5287 5288 tbl = get_iommu_table_base(&vdev->dev); 5289 5290 /* netdev inits at probe time along with the structures we need below*/ 5291 if (!netdev) 5292 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5293 5294 adapter = netdev_priv(netdev); 5295 5296 ret += PAGE_SIZE; /* the crq message queue */ 5297 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5298 5299 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5300 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5301 5302 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5303 i++) 5304 ret += adapter->rx_pool[i].size * 5305 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5306 5307 return ret; 5308 } 5309 5310 static int ibmvnic_resume(struct device *dev) 5311 { 5312 struct net_device *netdev = dev_get_drvdata(dev); 5313 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5314 5315 if (adapter->state != VNIC_OPEN) 5316 return 0; 5317 5318 tasklet_schedule(&adapter->tasklet); 5319 5320 return 0; 5321 } 5322 5323 static const struct vio_device_id ibmvnic_device_table[] = { 5324 {"network", "IBM,vnic"}, 5325 {"", "" } 5326 }; 5327 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5328 5329 static const struct dev_pm_ops ibmvnic_pm_ops = { 5330 .resume = ibmvnic_resume 5331 }; 5332 5333 static struct vio_driver ibmvnic_driver = { 5334 .id_table = ibmvnic_device_table, 5335 .probe = ibmvnic_probe, 5336 .remove = ibmvnic_remove, 5337 .get_desired_dma = ibmvnic_get_desired_dma, 5338 .name = ibmvnic_driver_name, 5339 .pm = &ibmvnic_pm_ops, 5340 }; 5341 5342 /* module functions */ 5343 static int __init ibmvnic_module_init(void) 5344 { 5345 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5346 IBMVNIC_DRIVER_VERSION); 5347 5348 return vio_register_driver(&ibmvnic_driver); 5349 } 5350 5351 static void __exit ibmvnic_module_exit(void) 5352 { 5353 vio_unregister_driver(&ibmvnic_driver); 5354 } 5355 5356 module_init(ibmvnic_module_init); 5357 module_exit(ibmvnic_module_exit); 5358