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