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