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