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 skb_frag_off(frag), 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 dma_unmap_single(dev, tx_buff->indir_dma, 1572 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE); 1573 } else { 1574 tx_buff->num_entries = num_entries; 1575 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1576 &tx_crq); 1577 } 1578 if (lpar_rc != H_SUCCESS) { 1579 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1580 dev_err_ratelimited(dev, "tx: send failed\n"); 1581 dev_kfree_skb_any(skb); 1582 tx_buff->skb = NULL; 1583 1584 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1585 /* Disable TX and report carrier off if queue is closed 1586 * or pending failover. 1587 * Firmware guarantees that a signal will be sent to the 1588 * driver, triggering a reset or some other action. 1589 */ 1590 netif_tx_stop_all_queues(netdev); 1591 netif_carrier_off(netdev); 1592 } 1593 1594 tx_send_failed++; 1595 tx_dropped++; 1596 ret = NETDEV_TX_OK; 1597 goto tx_err_out; 1598 } 1599 1600 if (atomic_add_return(num_entries, &tx_scrq->used) 1601 >= adapter->req_tx_entries_per_subcrq) { 1602 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1603 netif_stop_subqueue(netdev, queue_num); 1604 } 1605 1606 tx_packets++; 1607 tx_bytes += skb->len; 1608 txq->trans_start = jiffies; 1609 ret = NETDEV_TX_OK; 1610 goto out; 1611 1612 tx_err_out: 1613 /* roll back consumer index and map array*/ 1614 if (tx_pool->consumer_index == 0) 1615 tx_pool->consumer_index = 1616 tx_pool->num_buffers - 1; 1617 else 1618 tx_pool->consumer_index--; 1619 tx_pool->free_map[tx_pool->consumer_index] = index; 1620 out: 1621 netdev->stats.tx_dropped += tx_dropped; 1622 netdev->stats.tx_bytes += tx_bytes; 1623 netdev->stats.tx_packets += tx_packets; 1624 adapter->tx_send_failed += tx_send_failed; 1625 adapter->tx_map_failed += tx_map_failed; 1626 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1627 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1628 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1629 1630 return ret; 1631 } 1632 1633 static void ibmvnic_set_multi(struct net_device *netdev) 1634 { 1635 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1636 struct netdev_hw_addr *ha; 1637 union ibmvnic_crq crq; 1638 1639 memset(&crq, 0, sizeof(crq)); 1640 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1641 crq.request_capability.cmd = REQUEST_CAPABILITY; 1642 1643 if (netdev->flags & IFF_PROMISC) { 1644 if (!adapter->promisc_supported) 1645 return; 1646 } else { 1647 if (netdev->flags & IFF_ALLMULTI) { 1648 /* Accept all multicast */ 1649 memset(&crq, 0, sizeof(crq)); 1650 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1651 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1652 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1653 ibmvnic_send_crq(adapter, &crq); 1654 } else if (netdev_mc_empty(netdev)) { 1655 /* Reject all multicast */ 1656 memset(&crq, 0, sizeof(crq)); 1657 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1658 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1659 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1660 ibmvnic_send_crq(adapter, &crq); 1661 } else { 1662 /* Accept one or more multicast(s) */ 1663 netdev_for_each_mc_addr(ha, netdev) { 1664 memset(&crq, 0, sizeof(crq)); 1665 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1666 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1667 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1668 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1669 ha->addr); 1670 ibmvnic_send_crq(adapter, &crq); 1671 } 1672 } 1673 } 1674 } 1675 1676 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1677 { 1678 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1679 union ibmvnic_crq crq; 1680 int rc; 1681 1682 if (!is_valid_ether_addr(dev_addr)) { 1683 rc = -EADDRNOTAVAIL; 1684 goto err; 1685 } 1686 1687 memset(&crq, 0, sizeof(crq)); 1688 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1689 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1690 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1691 1692 init_completion(&adapter->fw_done); 1693 rc = ibmvnic_send_crq(adapter, &crq); 1694 if (rc) { 1695 rc = -EIO; 1696 goto err; 1697 } 1698 1699 wait_for_completion(&adapter->fw_done); 1700 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1701 if (adapter->fw_done_rc) { 1702 rc = -EIO; 1703 goto err; 1704 } 1705 1706 return 0; 1707 err: 1708 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1709 return rc; 1710 } 1711 1712 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1713 { 1714 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1715 struct sockaddr *addr = p; 1716 int rc; 1717 1718 rc = 0; 1719 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1720 if (adapter->state != VNIC_PROBED) 1721 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1722 1723 return rc; 1724 } 1725 1726 /** 1727 * do_reset returns zero if we are able to keep processing reset events, or 1728 * non-zero if we hit a fatal error and must halt. 1729 */ 1730 static int do_reset(struct ibmvnic_adapter *adapter, 1731 struct ibmvnic_rwi *rwi, u32 reset_state) 1732 { 1733 u64 old_num_rx_queues, old_num_tx_queues; 1734 u64 old_num_rx_slots, old_num_tx_slots; 1735 struct net_device *netdev = adapter->netdev; 1736 int i, rc; 1737 1738 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1739 rwi->reset_reason); 1740 1741 netif_carrier_off(netdev); 1742 adapter->reset_reason = rwi->reset_reason; 1743 1744 old_num_rx_queues = adapter->req_rx_queues; 1745 old_num_tx_queues = adapter->req_tx_queues; 1746 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1747 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1748 1749 ibmvnic_cleanup(netdev); 1750 1751 if (reset_state == VNIC_OPEN && 1752 adapter->reset_reason != VNIC_RESET_MOBILITY && 1753 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1754 rc = __ibmvnic_close(netdev); 1755 if (rc) 1756 return rc; 1757 } 1758 1759 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1760 adapter->wait_for_reset) { 1761 release_resources(adapter); 1762 release_sub_crqs(adapter, 1); 1763 release_crq_queue(adapter); 1764 } 1765 1766 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1767 /* remove the closed state so when we call open it appears 1768 * we are coming from the probed state. 1769 */ 1770 adapter->state = VNIC_PROBED; 1771 1772 if (adapter->wait_for_reset) { 1773 rc = init_crq_queue(adapter); 1774 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1775 rc = ibmvnic_reenable_crq_queue(adapter); 1776 release_sub_crqs(adapter, 1); 1777 } else { 1778 rc = ibmvnic_reset_crq(adapter); 1779 if (!rc) 1780 rc = vio_enable_interrupts(adapter->vdev); 1781 } 1782 1783 if (rc) { 1784 netdev_err(adapter->netdev, 1785 "Couldn't initialize crq. rc=%d\n", rc); 1786 return rc; 1787 } 1788 1789 rc = ibmvnic_reset_init(adapter); 1790 if (rc) 1791 return IBMVNIC_INIT_FAILED; 1792 1793 /* If the adapter was in PROBE state prior to the reset, 1794 * exit here. 1795 */ 1796 if (reset_state == VNIC_PROBED) 1797 return 0; 1798 1799 rc = ibmvnic_login(netdev); 1800 if (rc) { 1801 adapter->state = reset_state; 1802 return rc; 1803 } 1804 1805 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1806 adapter->wait_for_reset) { 1807 rc = init_resources(adapter); 1808 if (rc) 1809 return rc; 1810 } else if (adapter->req_rx_queues != old_num_rx_queues || 1811 adapter->req_tx_queues != old_num_tx_queues || 1812 adapter->req_rx_add_entries_per_subcrq != 1813 old_num_rx_slots || 1814 adapter->req_tx_entries_per_subcrq != 1815 old_num_tx_slots) { 1816 release_rx_pools(adapter); 1817 release_tx_pools(adapter); 1818 release_napi(adapter); 1819 release_vpd_data(adapter); 1820 1821 rc = init_resources(adapter); 1822 if (rc) 1823 return rc; 1824 1825 } else { 1826 rc = reset_tx_pools(adapter); 1827 if (rc) 1828 return rc; 1829 1830 rc = reset_rx_pools(adapter); 1831 if (rc) 1832 return rc; 1833 } 1834 ibmvnic_disable_irqs(adapter); 1835 } 1836 adapter->state = VNIC_CLOSED; 1837 1838 if (reset_state == VNIC_CLOSED) 1839 return 0; 1840 1841 rc = __ibmvnic_open(netdev); 1842 if (rc) { 1843 if (list_empty(&adapter->rwi_list)) 1844 adapter->state = VNIC_CLOSED; 1845 else 1846 adapter->state = reset_state; 1847 1848 return 0; 1849 } 1850 1851 /* refresh device's multicast list */ 1852 ibmvnic_set_multi(netdev); 1853 1854 /* kick napi */ 1855 for (i = 0; i < adapter->req_rx_queues; i++) 1856 napi_schedule(&adapter->napi[i]); 1857 1858 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 1859 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) 1860 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 1861 1862 return 0; 1863 } 1864 1865 static int do_hard_reset(struct ibmvnic_adapter *adapter, 1866 struct ibmvnic_rwi *rwi, u32 reset_state) 1867 { 1868 struct net_device *netdev = adapter->netdev; 1869 int rc; 1870 1871 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 1872 rwi->reset_reason); 1873 1874 netif_carrier_off(netdev); 1875 adapter->reset_reason = rwi->reset_reason; 1876 1877 ibmvnic_cleanup(netdev); 1878 release_resources(adapter); 1879 release_sub_crqs(adapter, 0); 1880 release_crq_queue(adapter); 1881 1882 /* remove the closed state so when we call open it appears 1883 * we are coming from the probed state. 1884 */ 1885 adapter->state = VNIC_PROBED; 1886 1887 reinit_completion(&adapter->init_done); 1888 rc = init_crq_queue(adapter); 1889 if (rc) { 1890 netdev_err(adapter->netdev, 1891 "Couldn't initialize crq. rc=%d\n", rc); 1892 return rc; 1893 } 1894 1895 rc = ibmvnic_init(adapter); 1896 if (rc) 1897 return rc; 1898 1899 /* If the adapter was in PROBE state prior to the reset, 1900 * exit here. 1901 */ 1902 if (reset_state == VNIC_PROBED) 1903 return 0; 1904 1905 rc = ibmvnic_login(netdev); 1906 if (rc) { 1907 adapter->state = VNIC_PROBED; 1908 return 0; 1909 } 1910 1911 rc = init_resources(adapter); 1912 if (rc) 1913 return rc; 1914 1915 ibmvnic_disable_irqs(adapter); 1916 adapter->state = VNIC_CLOSED; 1917 1918 if (reset_state == VNIC_CLOSED) 1919 return 0; 1920 1921 rc = __ibmvnic_open(netdev); 1922 if (rc) { 1923 if (list_empty(&adapter->rwi_list)) 1924 adapter->state = VNIC_CLOSED; 1925 else 1926 adapter->state = reset_state; 1927 1928 return 0; 1929 } 1930 1931 return 0; 1932 } 1933 1934 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1935 { 1936 struct ibmvnic_rwi *rwi; 1937 unsigned long flags; 1938 1939 spin_lock_irqsave(&adapter->rwi_lock, flags); 1940 1941 if (!list_empty(&adapter->rwi_list)) { 1942 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1943 list); 1944 list_del(&rwi->list); 1945 } else { 1946 rwi = NULL; 1947 } 1948 1949 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 1950 return rwi; 1951 } 1952 1953 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1954 { 1955 struct ibmvnic_rwi *rwi; 1956 1957 rwi = get_next_rwi(adapter); 1958 while (rwi) { 1959 kfree(rwi); 1960 rwi = get_next_rwi(adapter); 1961 } 1962 } 1963 1964 static void __ibmvnic_reset(struct work_struct *work) 1965 { 1966 struct ibmvnic_rwi *rwi; 1967 struct ibmvnic_adapter *adapter; 1968 bool we_lock_rtnl = false; 1969 u32 reset_state; 1970 int rc = 0; 1971 1972 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1973 1974 /* netif_set_real_num_xx_queues needs to take rtnl lock here 1975 * unless wait_for_reset is set, in which case the rtnl lock 1976 * has already been taken before initializing the reset 1977 */ 1978 if (!adapter->wait_for_reset) { 1979 rtnl_lock(); 1980 we_lock_rtnl = true; 1981 } 1982 reset_state = adapter->state; 1983 1984 rwi = get_next_rwi(adapter); 1985 while (rwi) { 1986 if (adapter->state == VNIC_REMOVING || 1987 adapter->state == VNIC_REMOVED) 1988 goto out; 1989 1990 if (adapter->force_reset_recovery) { 1991 adapter->force_reset_recovery = false; 1992 rc = do_hard_reset(adapter, rwi, reset_state); 1993 } else { 1994 rc = do_reset(adapter, rwi, reset_state); 1995 } 1996 kfree(rwi); 1997 if (rc && rc != IBMVNIC_INIT_FAILED && 1998 !adapter->force_reset_recovery) 1999 break; 2000 2001 rwi = get_next_rwi(adapter); 2002 } 2003 2004 if (adapter->wait_for_reset) { 2005 adapter->wait_for_reset = false; 2006 adapter->reset_done_rc = rc; 2007 complete(&adapter->reset_done); 2008 } 2009 2010 if (rc) { 2011 netdev_dbg(adapter->netdev, "Reset failed\n"); 2012 free_all_rwi(adapter); 2013 } 2014 out: 2015 adapter->resetting = false; 2016 if (we_lock_rtnl) 2017 rtnl_unlock(); 2018 } 2019 2020 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2021 enum ibmvnic_reset_reason reason) 2022 { 2023 struct list_head *entry, *tmp_entry; 2024 struct ibmvnic_rwi *rwi, *tmp; 2025 struct net_device *netdev = adapter->netdev; 2026 unsigned long flags; 2027 int ret; 2028 2029 if (adapter->state == VNIC_REMOVING || 2030 adapter->state == VNIC_REMOVED || 2031 adapter->failover_pending) { 2032 ret = EBUSY; 2033 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2034 goto err; 2035 } 2036 2037 if (adapter->state == VNIC_PROBING) { 2038 netdev_warn(netdev, "Adapter reset during probe\n"); 2039 ret = adapter->init_done_rc = EAGAIN; 2040 goto err; 2041 } 2042 2043 spin_lock_irqsave(&adapter->rwi_lock, flags); 2044 2045 list_for_each(entry, &adapter->rwi_list) { 2046 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2047 if (tmp->reset_reason == reason) { 2048 netdev_dbg(netdev, "Skipping matching reset\n"); 2049 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2050 ret = EBUSY; 2051 goto err; 2052 } 2053 } 2054 2055 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2056 if (!rwi) { 2057 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2058 ibmvnic_close(netdev); 2059 ret = ENOMEM; 2060 goto err; 2061 } 2062 /* if we just received a transport event, 2063 * flush reset queue and process this reset 2064 */ 2065 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2066 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2067 list_del(entry); 2068 } 2069 rwi->reset_reason = reason; 2070 list_add_tail(&rwi->list, &adapter->rwi_list); 2071 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2072 adapter->resetting = true; 2073 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2074 schedule_work(&adapter->ibmvnic_reset); 2075 2076 return 0; 2077 err: 2078 if (adapter->wait_for_reset) 2079 adapter->wait_for_reset = false; 2080 return -ret; 2081 } 2082 2083 static void ibmvnic_tx_timeout(struct net_device *dev) 2084 { 2085 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2086 2087 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2088 } 2089 2090 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2091 struct ibmvnic_rx_buff *rx_buff) 2092 { 2093 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2094 2095 rx_buff->skb = NULL; 2096 2097 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2098 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2099 2100 atomic_dec(&pool->available); 2101 } 2102 2103 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2104 { 2105 struct net_device *netdev = napi->dev; 2106 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2107 int scrq_num = (int)(napi - adapter->napi); 2108 int frames_processed = 0; 2109 2110 restart_poll: 2111 while (frames_processed < budget) { 2112 struct sk_buff *skb; 2113 struct ibmvnic_rx_buff *rx_buff; 2114 union sub_crq *next; 2115 u32 length; 2116 u16 offset; 2117 u8 flags = 0; 2118 2119 if (unlikely(adapter->resetting && 2120 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2121 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2122 napi_complete_done(napi, frames_processed); 2123 return frames_processed; 2124 } 2125 2126 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2127 break; 2128 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2129 rx_buff = 2130 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2131 rx_comp.correlator); 2132 /* do error checking */ 2133 if (next->rx_comp.rc) { 2134 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2135 be16_to_cpu(next->rx_comp.rc)); 2136 /* free the entry */ 2137 next->rx_comp.first = 0; 2138 dev_kfree_skb_any(rx_buff->skb); 2139 remove_buff_from_pool(adapter, rx_buff); 2140 continue; 2141 } else if (!rx_buff->skb) { 2142 /* free the entry */ 2143 next->rx_comp.first = 0; 2144 remove_buff_from_pool(adapter, rx_buff); 2145 continue; 2146 } 2147 2148 length = be32_to_cpu(next->rx_comp.len); 2149 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2150 flags = next->rx_comp.flags; 2151 skb = rx_buff->skb; 2152 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2153 length); 2154 2155 /* VLAN Header has been stripped by the system firmware and 2156 * needs to be inserted by the driver 2157 */ 2158 if (adapter->rx_vlan_header_insertion && 2159 (flags & IBMVNIC_VLAN_STRIPPED)) 2160 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2161 ntohs(next->rx_comp.vlan_tci)); 2162 2163 /* free the entry */ 2164 next->rx_comp.first = 0; 2165 remove_buff_from_pool(adapter, rx_buff); 2166 2167 skb_put(skb, length); 2168 skb->protocol = eth_type_trans(skb, netdev); 2169 skb_record_rx_queue(skb, scrq_num); 2170 2171 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2172 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2173 skb->ip_summed = CHECKSUM_UNNECESSARY; 2174 } 2175 2176 length = skb->len; 2177 napi_gro_receive(napi, skb); /* send it up */ 2178 netdev->stats.rx_packets++; 2179 netdev->stats.rx_bytes += length; 2180 adapter->rx_stats_buffers[scrq_num].packets++; 2181 adapter->rx_stats_buffers[scrq_num].bytes += length; 2182 frames_processed++; 2183 } 2184 2185 if (adapter->state != VNIC_CLOSING) 2186 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2187 2188 if (frames_processed < budget) { 2189 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2190 napi_complete_done(napi, frames_processed); 2191 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2192 napi_reschedule(napi)) { 2193 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2194 goto restart_poll; 2195 } 2196 } 2197 return frames_processed; 2198 } 2199 2200 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2201 { 2202 int rc, ret; 2203 2204 adapter->fallback.mtu = adapter->req_mtu; 2205 adapter->fallback.rx_queues = adapter->req_rx_queues; 2206 adapter->fallback.tx_queues = adapter->req_tx_queues; 2207 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2208 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2209 2210 init_completion(&adapter->reset_done); 2211 adapter->wait_for_reset = true; 2212 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2213 if (rc) 2214 return rc; 2215 wait_for_completion(&adapter->reset_done); 2216 2217 ret = 0; 2218 if (adapter->reset_done_rc) { 2219 ret = -EIO; 2220 adapter->desired.mtu = adapter->fallback.mtu; 2221 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2222 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2223 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2224 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2225 2226 init_completion(&adapter->reset_done); 2227 adapter->wait_for_reset = true; 2228 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2229 if (rc) 2230 return ret; 2231 wait_for_completion(&adapter->reset_done); 2232 } 2233 adapter->wait_for_reset = false; 2234 2235 return ret; 2236 } 2237 2238 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2239 { 2240 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2241 2242 adapter->desired.mtu = new_mtu + ETH_HLEN; 2243 2244 return wait_for_reset(adapter); 2245 } 2246 2247 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2248 struct net_device *dev, 2249 netdev_features_t features) 2250 { 2251 /* Some backing hardware adapters can not 2252 * handle packets with a MSS less than 224 2253 * or with only one segment. 2254 */ 2255 if (skb_is_gso(skb)) { 2256 if (skb_shinfo(skb)->gso_size < 224 || 2257 skb_shinfo(skb)->gso_segs == 1) 2258 features &= ~NETIF_F_GSO_MASK; 2259 } 2260 2261 return features; 2262 } 2263 2264 static const struct net_device_ops ibmvnic_netdev_ops = { 2265 .ndo_open = ibmvnic_open, 2266 .ndo_stop = ibmvnic_close, 2267 .ndo_start_xmit = ibmvnic_xmit, 2268 .ndo_set_rx_mode = ibmvnic_set_multi, 2269 .ndo_set_mac_address = ibmvnic_set_mac, 2270 .ndo_validate_addr = eth_validate_addr, 2271 .ndo_tx_timeout = ibmvnic_tx_timeout, 2272 .ndo_change_mtu = ibmvnic_change_mtu, 2273 .ndo_features_check = ibmvnic_features_check, 2274 }; 2275 2276 /* ethtool functions */ 2277 2278 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2279 struct ethtool_link_ksettings *cmd) 2280 { 2281 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2282 int rc; 2283 2284 rc = send_query_phys_parms(adapter); 2285 if (rc) { 2286 adapter->speed = SPEED_UNKNOWN; 2287 adapter->duplex = DUPLEX_UNKNOWN; 2288 } 2289 cmd->base.speed = adapter->speed; 2290 cmd->base.duplex = adapter->duplex; 2291 cmd->base.port = PORT_FIBRE; 2292 cmd->base.phy_address = 0; 2293 cmd->base.autoneg = AUTONEG_ENABLE; 2294 2295 return 0; 2296 } 2297 2298 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2299 struct ethtool_drvinfo *info) 2300 { 2301 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2302 2303 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2304 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2305 strlcpy(info->fw_version, adapter->fw_version, 2306 sizeof(info->fw_version)); 2307 } 2308 2309 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2310 { 2311 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2312 2313 return adapter->msg_enable; 2314 } 2315 2316 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2317 { 2318 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2319 2320 adapter->msg_enable = data; 2321 } 2322 2323 static u32 ibmvnic_get_link(struct net_device *netdev) 2324 { 2325 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2326 2327 /* Don't need to send a query because we request a logical link up at 2328 * init and then we wait for link state indications 2329 */ 2330 return adapter->logical_link_state; 2331 } 2332 2333 static void ibmvnic_get_ringparam(struct net_device *netdev, 2334 struct ethtool_ringparam *ring) 2335 { 2336 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2337 2338 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2339 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2340 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2341 } else { 2342 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2343 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2344 } 2345 ring->rx_mini_max_pending = 0; 2346 ring->rx_jumbo_max_pending = 0; 2347 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2348 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2349 ring->rx_mini_pending = 0; 2350 ring->rx_jumbo_pending = 0; 2351 } 2352 2353 static int ibmvnic_set_ringparam(struct net_device *netdev, 2354 struct ethtool_ringparam *ring) 2355 { 2356 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2357 int ret; 2358 2359 ret = 0; 2360 adapter->desired.rx_entries = ring->rx_pending; 2361 adapter->desired.tx_entries = ring->tx_pending; 2362 2363 ret = wait_for_reset(adapter); 2364 2365 if (!ret && 2366 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2367 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2368 netdev_info(netdev, 2369 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2370 ring->rx_pending, ring->tx_pending, 2371 adapter->req_rx_add_entries_per_subcrq, 2372 adapter->req_tx_entries_per_subcrq); 2373 return ret; 2374 } 2375 2376 static void ibmvnic_get_channels(struct net_device *netdev, 2377 struct ethtool_channels *channels) 2378 { 2379 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2380 2381 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2382 channels->max_rx = adapter->max_rx_queues; 2383 channels->max_tx = adapter->max_tx_queues; 2384 } else { 2385 channels->max_rx = IBMVNIC_MAX_QUEUES; 2386 channels->max_tx = IBMVNIC_MAX_QUEUES; 2387 } 2388 2389 channels->max_other = 0; 2390 channels->max_combined = 0; 2391 channels->rx_count = adapter->req_rx_queues; 2392 channels->tx_count = adapter->req_tx_queues; 2393 channels->other_count = 0; 2394 channels->combined_count = 0; 2395 } 2396 2397 static int ibmvnic_set_channels(struct net_device *netdev, 2398 struct ethtool_channels *channels) 2399 { 2400 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2401 int ret; 2402 2403 ret = 0; 2404 adapter->desired.rx_queues = channels->rx_count; 2405 adapter->desired.tx_queues = channels->tx_count; 2406 2407 ret = wait_for_reset(adapter); 2408 2409 if (!ret && 2410 (adapter->req_rx_queues != channels->rx_count || 2411 adapter->req_tx_queues != channels->tx_count)) 2412 netdev_info(netdev, 2413 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2414 channels->rx_count, channels->tx_count, 2415 adapter->req_rx_queues, adapter->req_tx_queues); 2416 return ret; 2417 2418 } 2419 2420 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2421 { 2422 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2423 int i; 2424 2425 switch (stringset) { 2426 case ETH_SS_STATS: 2427 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2428 i++, data += ETH_GSTRING_LEN) 2429 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2430 2431 for (i = 0; i < adapter->req_tx_queues; i++) { 2432 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2433 data += ETH_GSTRING_LEN; 2434 2435 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2436 data += ETH_GSTRING_LEN; 2437 2438 snprintf(data, ETH_GSTRING_LEN, 2439 "tx%d_dropped_packets", i); 2440 data += ETH_GSTRING_LEN; 2441 } 2442 2443 for (i = 0; i < adapter->req_rx_queues; i++) { 2444 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2445 data += ETH_GSTRING_LEN; 2446 2447 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2448 data += ETH_GSTRING_LEN; 2449 2450 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2451 data += ETH_GSTRING_LEN; 2452 } 2453 break; 2454 2455 case ETH_SS_PRIV_FLAGS: 2456 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2457 strcpy(data + i * ETH_GSTRING_LEN, 2458 ibmvnic_priv_flags[i]); 2459 break; 2460 default: 2461 return; 2462 } 2463 } 2464 2465 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2466 { 2467 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2468 2469 switch (sset) { 2470 case ETH_SS_STATS: 2471 return ARRAY_SIZE(ibmvnic_stats) + 2472 adapter->req_tx_queues * NUM_TX_STATS + 2473 adapter->req_rx_queues * NUM_RX_STATS; 2474 case ETH_SS_PRIV_FLAGS: 2475 return ARRAY_SIZE(ibmvnic_priv_flags); 2476 default: 2477 return -EOPNOTSUPP; 2478 } 2479 } 2480 2481 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2482 struct ethtool_stats *stats, u64 *data) 2483 { 2484 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2485 union ibmvnic_crq crq; 2486 int i, j; 2487 int rc; 2488 2489 memset(&crq, 0, sizeof(crq)); 2490 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2491 crq.request_statistics.cmd = REQUEST_STATISTICS; 2492 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2493 crq.request_statistics.len = 2494 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2495 2496 /* Wait for data to be written */ 2497 init_completion(&adapter->stats_done); 2498 rc = ibmvnic_send_crq(adapter, &crq); 2499 if (rc) 2500 return; 2501 wait_for_completion(&adapter->stats_done); 2502 2503 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2504 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2505 ibmvnic_stats[i].offset)); 2506 2507 for (j = 0; j < adapter->req_tx_queues; j++) { 2508 data[i] = adapter->tx_stats_buffers[j].packets; 2509 i++; 2510 data[i] = adapter->tx_stats_buffers[j].bytes; 2511 i++; 2512 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2513 i++; 2514 } 2515 2516 for (j = 0; j < adapter->req_rx_queues; j++) { 2517 data[i] = adapter->rx_stats_buffers[j].packets; 2518 i++; 2519 data[i] = adapter->rx_stats_buffers[j].bytes; 2520 i++; 2521 data[i] = adapter->rx_stats_buffers[j].interrupts; 2522 i++; 2523 } 2524 } 2525 2526 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2527 { 2528 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2529 2530 return adapter->priv_flags; 2531 } 2532 2533 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2534 { 2535 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2536 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2537 2538 if (which_maxes) 2539 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2540 else 2541 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2542 2543 return 0; 2544 } 2545 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2546 .get_drvinfo = ibmvnic_get_drvinfo, 2547 .get_msglevel = ibmvnic_get_msglevel, 2548 .set_msglevel = ibmvnic_set_msglevel, 2549 .get_link = ibmvnic_get_link, 2550 .get_ringparam = ibmvnic_get_ringparam, 2551 .set_ringparam = ibmvnic_set_ringparam, 2552 .get_channels = ibmvnic_get_channels, 2553 .set_channels = ibmvnic_set_channels, 2554 .get_strings = ibmvnic_get_strings, 2555 .get_sset_count = ibmvnic_get_sset_count, 2556 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2557 .get_link_ksettings = ibmvnic_get_link_ksettings, 2558 .get_priv_flags = ibmvnic_get_priv_flags, 2559 .set_priv_flags = ibmvnic_set_priv_flags, 2560 }; 2561 2562 /* Routines for managing CRQs/sCRQs */ 2563 2564 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2565 struct ibmvnic_sub_crq_queue *scrq) 2566 { 2567 int rc; 2568 2569 if (scrq->irq) { 2570 free_irq(scrq->irq, scrq); 2571 irq_dispose_mapping(scrq->irq); 2572 scrq->irq = 0; 2573 } 2574 2575 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2576 atomic_set(&scrq->used, 0); 2577 scrq->cur = 0; 2578 2579 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2580 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2581 return rc; 2582 } 2583 2584 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2585 { 2586 int i, rc; 2587 2588 for (i = 0; i < adapter->req_tx_queues; i++) { 2589 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2590 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2591 if (rc) 2592 return rc; 2593 } 2594 2595 for (i = 0; i < adapter->req_rx_queues; i++) { 2596 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2597 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2598 if (rc) 2599 return rc; 2600 } 2601 2602 return rc; 2603 } 2604 2605 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2606 struct ibmvnic_sub_crq_queue *scrq, 2607 bool do_h_free) 2608 { 2609 struct device *dev = &adapter->vdev->dev; 2610 long rc; 2611 2612 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2613 2614 if (do_h_free) { 2615 /* Close the sub-crqs */ 2616 do { 2617 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2618 adapter->vdev->unit_address, 2619 scrq->crq_num); 2620 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2621 2622 if (rc) { 2623 netdev_err(adapter->netdev, 2624 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2625 scrq->crq_num, rc); 2626 } 2627 } 2628 2629 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2630 DMA_BIDIRECTIONAL); 2631 free_pages((unsigned long)scrq->msgs, 2); 2632 kfree(scrq); 2633 } 2634 2635 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2636 *adapter) 2637 { 2638 struct device *dev = &adapter->vdev->dev; 2639 struct ibmvnic_sub_crq_queue *scrq; 2640 int rc; 2641 2642 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2643 if (!scrq) 2644 return NULL; 2645 2646 scrq->msgs = 2647 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2648 if (!scrq->msgs) { 2649 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2650 goto zero_page_failed; 2651 } 2652 2653 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2654 DMA_BIDIRECTIONAL); 2655 if (dma_mapping_error(dev, scrq->msg_token)) { 2656 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2657 goto map_failed; 2658 } 2659 2660 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2661 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2662 2663 if (rc == H_RESOURCE) 2664 rc = ibmvnic_reset_crq(adapter); 2665 2666 if (rc == H_CLOSED) { 2667 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2668 } else if (rc) { 2669 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2670 goto reg_failed; 2671 } 2672 2673 scrq->adapter = adapter; 2674 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2675 spin_lock_init(&scrq->lock); 2676 2677 netdev_dbg(adapter->netdev, 2678 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2679 scrq->crq_num, scrq->hw_irq, scrq->irq); 2680 2681 return scrq; 2682 2683 reg_failed: 2684 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2685 DMA_BIDIRECTIONAL); 2686 map_failed: 2687 free_pages((unsigned long)scrq->msgs, 2); 2688 zero_page_failed: 2689 kfree(scrq); 2690 2691 return NULL; 2692 } 2693 2694 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2695 { 2696 int i; 2697 2698 if (adapter->tx_scrq) { 2699 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2700 if (!adapter->tx_scrq[i]) 2701 continue; 2702 2703 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2704 i); 2705 if (adapter->tx_scrq[i]->irq) { 2706 free_irq(adapter->tx_scrq[i]->irq, 2707 adapter->tx_scrq[i]); 2708 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2709 adapter->tx_scrq[i]->irq = 0; 2710 } 2711 2712 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2713 do_h_free); 2714 } 2715 2716 kfree(adapter->tx_scrq); 2717 adapter->tx_scrq = NULL; 2718 adapter->num_active_tx_scrqs = 0; 2719 } 2720 2721 if (adapter->rx_scrq) { 2722 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2723 if (!adapter->rx_scrq[i]) 2724 continue; 2725 2726 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2727 i); 2728 if (adapter->rx_scrq[i]->irq) { 2729 free_irq(adapter->rx_scrq[i]->irq, 2730 adapter->rx_scrq[i]); 2731 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2732 adapter->rx_scrq[i]->irq = 0; 2733 } 2734 2735 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2736 do_h_free); 2737 } 2738 2739 kfree(adapter->rx_scrq); 2740 adapter->rx_scrq = NULL; 2741 adapter->num_active_rx_scrqs = 0; 2742 } 2743 } 2744 2745 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2746 struct ibmvnic_sub_crq_queue *scrq) 2747 { 2748 struct device *dev = &adapter->vdev->dev; 2749 unsigned long rc; 2750 2751 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2752 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2753 if (rc) 2754 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2755 scrq->hw_irq, rc); 2756 return rc; 2757 } 2758 2759 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2760 struct ibmvnic_sub_crq_queue *scrq) 2761 { 2762 struct device *dev = &adapter->vdev->dev; 2763 unsigned long rc; 2764 2765 if (scrq->hw_irq > 0x100000000ULL) { 2766 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2767 return 1; 2768 } 2769 2770 if (adapter->resetting && 2771 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2772 u64 val = (0xff000000) | scrq->hw_irq; 2773 2774 rc = plpar_hcall_norets(H_EOI, val); 2775 if (rc) 2776 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 2777 val, rc); 2778 } 2779 2780 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2781 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2782 if (rc) 2783 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2784 scrq->hw_irq, rc); 2785 return rc; 2786 } 2787 2788 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2789 struct ibmvnic_sub_crq_queue *scrq) 2790 { 2791 struct device *dev = &adapter->vdev->dev; 2792 struct ibmvnic_tx_pool *tx_pool; 2793 struct ibmvnic_tx_buff *txbuff; 2794 union sub_crq *next; 2795 int index; 2796 int i, j; 2797 2798 restart_loop: 2799 while (pending_scrq(adapter, scrq)) { 2800 unsigned int pool = scrq->pool_index; 2801 int num_entries = 0; 2802 2803 next = ibmvnic_next_scrq(adapter, scrq); 2804 for (i = 0; i < next->tx_comp.num_comps; i++) { 2805 if (next->tx_comp.rcs[i]) { 2806 dev_err(dev, "tx error %x\n", 2807 next->tx_comp.rcs[i]); 2808 continue; 2809 } 2810 index = be32_to_cpu(next->tx_comp.correlators[i]); 2811 if (index & IBMVNIC_TSO_POOL_MASK) { 2812 tx_pool = &adapter->tso_pool[pool]; 2813 index &= ~IBMVNIC_TSO_POOL_MASK; 2814 } else { 2815 tx_pool = &adapter->tx_pool[pool]; 2816 } 2817 2818 txbuff = &tx_pool->tx_buff[index]; 2819 2820 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2821 if (!txbuff->data_dma[j]) 2822 continue; 2823 2824 txbuff->data_dma[j] = 0; 2825 } 2826 2827 if (txbuff->last_frag) { 2828 dev_kfree_skb_any(txbuff->skb); 2829 txbuff->skb = NULL; 2830 } 2831 2832 num_entries += txbuff->num_entries; 2833 2834 tx_pool->free_map[tx_pool->producer_index] = index; 2835 tx_pool->producer_index = 2836 (tx_pool->producer_index + 1) % 2837 tx_pool->num_buffers; 2838 } 2839 /* remove tx_comp scrq*/ 2840 next->tx_comp.first = 0; 2841 2842 if (atomic_sub_return(num_entries, &scrq->used) <= 2843 (adapter->req_tx_entries_per_subcrq / 2) && 2844 __netif_subqueue_stopped(adapter->netdev, 2845 scrq->pool_index)) { 2846 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2847 netdev_dbg(adapter->netdev, "Started queue %d\n", 2848 scrq->pool_index); 2849 } 2850 } 2851 2852 enable_scrq_irq(adapter, scrq); 2853 2854 if (pending_scrq(adapter, scrq)) { 2855 disable_scrq_irq(adapter, scrq); 2856 goto restart_loop; 2857 } 2858 2859 return 0; 2860 } 2861 2862 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2863 { 2864 struct ibmvnic_sub_crq_queue *scrq = instance; 2865 struct ibmvnic_adapter *adapter = scrq->adapter; 2866 2867 disable_scrq_irq(adapter, scrq); 2868 ibmvnic_complete_tx(adapter, scrq); 2869 2870 return IRQ_HANDLED; 2871 } 2872 2873 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2874 { 2875 struct ibmvnic_sub_crq_queue *scrq = instance; 2876 struct ibmvnic_adapter *adapter = scrq->adapter; 2877 2878 /* When booting a kdump kernel we can hit pending interrupts 2879 * prior to completing driver initialization. 2880 */ 2881 if (unlikely(adapter->state != VNIC_OPEN)) 2882 return IRQ_NONE; 2883 2884 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2885 2886 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2887 disable_scrq_irq(adapter, scrq); 2888 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2889 } 2890 2891 return IRQ_HANDLED; 2892 } 2893 2894 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2895 { 2896 struct device *dev = &adapter->vdev->dev; 2897 struct ibmvnic_sub_crq_queue *scrq; 2898 int i = 0, j = 0; 2899 int rc = 0; 2900 2901 for (i = 0; i < adapter->req_tx_queues; i++) { 2902 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2903 i); 2904 scrq = adapter->tx_scrq[i]; 2905 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2906 2907 if (!scrq->irq) { 2908 rc = -EINVAL; 2909 dev_err(dev, "Error mapping irq\n"); 2910 goto req_tx_irq_failed; 2911 } 2912 2913 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 2914 adapter->vdev->unit_address, i); 2915 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2916 0, scrq->name, scrq); 2917 2918 if (rc) { 2919 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2920 scrq->irq, rc); 2921 irq_dispose_mapping(scrq->irq); 2922 goto req_tx_irq_failed; 2923 } 2924 } 2925 2926 for (i = 0; i < adapter->req_rx_queues; i++) { 2927 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2928 i); 2929 scrq = adapter->rx_scrq[i]; 2930 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2931 if (!scrq->irq) { 2932 rc = -EINVAL; 2933 dev_err(dev, "Error mapping irq\n"); 2934 goto req_rx_irq_failed; 2935 } 2936 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 2937 adapter->vdev->unit_address, i); 2938 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2939 0, scrq->name, scrq); 2940 if (rc) { 2941 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2942 scrq->irq, rc); 2943 irq_dispose_mapping(scrq->irq); 2944 goto req_rx_irq_failed; 2945 } 2946 } 2947 return rc; 2948 2949 req_rx_irq_failed: 2950 for (j = 0; j < i; j++) { 2951 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2952 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2953 } 2954 i = adapter->req_tx_queues; 2955 req_tx_irq_failed: 2956 for (j = 0; j < i; j++) { 2957 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2958 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2959 } 2960 release_sub_crqs(adapter, 1); 2961 return rc; 2962 } 2963 2964 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2965 { 2966 struct device *dev = &adapter->vdev->dev; 2967 struct ibmvnic_sub_crq_queue **allqueues; 2968 int registered_queues = 0; 2969 int total_queues; 2970 int more = 0; 2971 int i; 2972 2973 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2974 2975 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2976 if (!allqueues) 2977 return -1; 2978 2979 for (i = 0; i < total_queues; i++) { 2980 allqueues[i] = init_sub_crq_queue(adapter); 2981 if (!allqueues[i]) { 2982 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2983 break; 2984 } 2985 registered_queues++; 2986 } 2987 2988 /* Make sure we were able to register the minimum number of queues */ 2989 if (registered_queues < 2990 adapter->min_tx_queues + adapter->min_rx_queues) { 2991 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 2992 goto tx_failed; 2993 } 2994 2995 /* Distribute the failed allocated queues*/ 2996 for (i = 0; i < total_queues - registered_queues + more ; i++) { 2997 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 2998 switch (i % 3) { 2999 case 0: 3000 if (adapter->req_rx_queues > adapter->min_rx_queues) 3001 adapter->req_rx_queues--; 3002 else 3003 more++; 3004 break; 3005 case 1: 3006 if (adapter->req_tx_queues > adapter->min_tx_queues) 3007 adapter->req_tx_queues--; 3008 else 3009 more++; 3010 break; 3011 } 3012 } 3013 3014 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3015 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3016 if (!adapter->tx_scrq) 3017 goto tx_failed; 3018 3019 for (i = 0; i < adapter->req_tx_queues; i++) { 3020 adapter->tx_scrq[i] = allqueues[i]; 3021 adapter->tx_scrq[i]->pool_index = i; 3022 adapter->num_active_tx_scrqs++; 3023 } 3024 3025 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3026 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3027 if (!adapter->rx_scrq) 3028 goto rx_failed; 3029 3030 for (i = 0; i < adapter->req_rx_queues; i++) { 3031 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3032 adapter->rx_scrq[i]->scrq_num = i; 3033 adapter->num_active_rx_scrqs++; 3034 } 3035 3036 kfree(allqueues); 3037 return 0; 3038 3039 rx_failed: 3040 kfree(adapter->tx_scrq); 3041 adapter->tx_scrq = NULL; 3042 tx_failed: 3043 for (i = 0; i < registered_queues; i++) 3044 release_sub_crq_queue(adapter, allqueues[i], 1); 3045 kfree(allqueues); 3046 return -1; 3047 } 3048 3049 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3050 { 3051 struct device *dev = &adapter->vdev->dev; 3052 union ibmvnic_crq crq; 3053 int max_entries; 3054 3055 if (!retry) { 3056 /* Sub-CRQ entries are 32 byte long */ 3057 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3058 3059 if (adapter->min_tx_entries_per_subcrq > entries_page || 3060 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3061 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3062 return; 3063 } 3064 3065 if (adapter->desired.mtu) 3066 adapter->req_mtu = adapter->desired.mtu; 3067 else 3068 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3069 3070 if (!adapter->desired.tx_entries) 3071 adapter->desired.tx_entries = 3072 adapter->max_tx_entries_per_subcrq; 3073 if (!adapter->desired.rx_entries) 3074 adapter->desired.rx_entries = 3075 adapter->max_rx_add_entries_per_subcrq; 3076 3077 max_entries = IBMVNIC_MAX_LTB_SIZE / 3078 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3079 3080 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3081 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3082 adapter->desired.tx_entries = max_entries; 3083 } 3084 3085 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3086 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3087 adapter->desired.rx_entries = max_entries; 3088 } 3089 3090 if (adapter->desired.tx_entries) 3091 adapter->req_tx_entries_per_subcrq = 3092 adapter->desired.tx_entries; 3093 else 3094 adapter->req_tx_entries_per_subcrq = 3095 adapter->max_tx_entries_per_subcrq; 3096 3097 if (adapter->desired.rx_entries) 3098 adapter->req_rx_add_entries_per_subcrq = 3099 adapter->desired.rx_entries; 3100 else 3101 adapter->req_rx_add_entries_per_subcrq = 3102 adapter->max_rx_add_entries_per_subcrq; 3103 3104 if (adapter->desired.tx_queues) 3105 adapter->req_tx_queues = 3106 adapter->desired.tx_queues; 3107 else 3108 adapter->req_tx_queues = 3109 adapter->opt_tx_comp_sub_queues; 3110 3111 if (adapter->desired.rx_queues) 3112 adapter->req_rx_queues = 3113 adapter->desired.rx_queues; 3114 else 3115 adapter->req_rx_queues = 3116 adapter->opt_rx_comp_queues; 3117 3118 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3119 } 3120 3121 memset(&crq, 0, sizeof(crq)); 3122 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3123 crq.request_capability.cmd = REQUEST_CAPABILITY; 3124 3125 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3126 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3127 atomic_inc(&adapter->running_cap_crqs); 3128 ibmvnic_send_crq(adapter, &crq); 3129 3130 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3131 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3132 atomic_inc(&adapter->running_cap_crqs); 3133 ibmvnic_send_crq(adapter, &crq); 3134 3135 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3136 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3137 atomic_inc(&adapter->running_cap_crqs); 3138 ibmvnic_send_crq(adapter, &crq); 3139 3140 crq.request_capability.capability = 3141 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3142 crq.request_capability.number = 3143 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3144 atomic_inc(&adapter->running_cap_crqs); 3145 ibmvnic_send_crq(adapter, &crq); 3146 3147 crq.request_capability.capability = 3148 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3149 crq.request_capability.number = 3150 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3151 atomic_inc(&adapter->running_cap_crqs); 3152 ibmvnic_send_crq(adapter, &crq); 3153 3154 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3155 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3156 atomic_inc(&adapter->running_cap_crqs); 3157 ibmvnic_send_crq(adapter, &crq); 3158 3159 if (adapter->netdev->flags & IFF_PROMISC) { 3160 if (adapter->promisc_supported) { 3161 crq.request_capability.capability = 3162 cpu_to_be16(PROMISC_REQUESTED); 3163 crq.request_capability.number = cpu_to_be64(1); 3164 atomic_inc(&adapter->running_cap_crqs); 3165 ibmvnic_send_crq(adapter, &crq); 3166 } 3167 } else { 3168 crq.request_capability.capability = 3169 cpu_to_be16(PROMISC_REQUESTED); 3170 crq.request_capability.number = cpu_to_be64(0); 3171 atomic_inc(&adapter->running_cap_crqs); 3172 ibmvnic_send_crq(adapter, &crq); 3173 } 3174 } 3175 3176 static int pending_scrq(struct ibmvnic_adapter *adapter, 3177 struct ibmvnic_sub_crq_queue *scrq) 3178 { 3179 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3180 3181 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3182 return 1; 3183 else 3184 return 0; 3185 } 3186 3187 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3188 struct ibmvnic_sub_crq_queue *scrq) 3189 { 3190 union sub_crq *entry; 3191 unsigned long flags; 3192 3193 spin_lock_irqsave(&scrq->lock, flags); 3194 entry = &scrq->msgs[scrq->cur]; 3195 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3196 if (++scrq->cur == scrq->size) 3197 scrq->cur = 0; 3198 } else { 3199 entry = NULL; 3200 } 3201 spin_unlock_irqrestore(&scrq->lock, flags); 3202 3203 return entry; 3204 } 3205 3206 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3207 { 3208 struct ibmvnic_crq_queue *queue = &adapter->crq; 3209 union ibmvnic_crq *crq; 3210 3211 crq = &queue->msgs[queue->cur]; 3212 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3213 if (++queue->cur == queue->size) 3214 queue->cur = 0; 3215 } else { 3216 crq = NULL; 3217 } 3218 3219 return crq; 3220 } 3221 3222 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3223 { 3224 switch (rc) { 3225 case H_PARAMETER: 3226 dev_warn_ratelimited(dev, 3227 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3228 func, rc); 3229 break; 3230 case H_CLOSED: 3231 dev_warn_ratelimited(dev, 3232 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3233 func, rc); 3234 break; 3235 default: 3236 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3237 break; 3238 } 3239 } 3240 3241 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3242 union sub_crq *sub_crq) 3243 { 3244 unsigned int ua = adapter->vdev->unit_address; 3245 struct device *dev = &adapter->vdev->dev; 3246 u64 *u64_crq = (u64 *)sub_crq; 3247 int rc; 3248 3249 netdev_dbg(adapter->netdev, 3250 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3251 (unsigned long int)cpu_to_be64(remote_handle), 3252 (unsigned long int)cpu_to_be64(u64_crq[0]), 3253 (unsigned long int)cpu_to_be64(u64_crq[1]), 3254 (unsigned long int)cpu_to_be64(u64_crq[2]), 3255 (unsigned long int)cpu_to_be64(u64_crq[3])); 3256 3257 /* Make sure the hypervisor sees the complete request */ 3258 mb(); 3259 3260 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3261 cpu_to_be64(remote_handle), 3262 cpu_to_be64(u64_crq[0]), 3263 cpu_to_be64(u64_crq[1]), 3264 cpu_to_be64(u64_crq[2]), 3265 cpu_to_be64(u64_crq[3])); 3266 3267 if (rc) 3268 print_subcrq_error(dev, rc, __func__); 3269 3270 return rc; 3271 } 3272 3273 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3274 u64 remote_handle, u64 ioba, u64 num_entries) 3275 { 3276 unsigned int ua = adapter->vdev->unit_address; 3277 struct device *dev = &adapter->vdev->dev; 3278 int rc; 3279 3280 /* Make sure the hypervisor sees the complete request */ 3281 mb(); 3282 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3283 cpu_to_be64(remote_handle), 3284 ioba, num_entries); 3285 3286 if (rc) 3287 print_subcrq_error(dev, rc, __func__); 3288 3289 return rc; 3290 } 3291 3292 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3293 union ibmvnic_crq *crq) 3294 { 3295 unsigned int ua = adapter->vdev->unit_address; 3296 struct device *dev = &adapter->vdev->dev; 3297 u64 *u64_crq = (u64 *)crq; 3298 int rc; 3299 3300 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3301 (unsigned long int)cpu_to_be64(u64_crq[0]), 3302 (unsigned long int)cpu_to_be64(u64_crq[1])); 3303 3304 if (!adapter->crq.active && 3305 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3306 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3307 return -EINVAL; 3308 } 3309 3310 /* Make sure the hypervisor sees the complete request */ 3311 mb(); 3312 3313 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3314 cpu_to_be64(u64_crq[0]), 3315 cpu_to_be64(u64_crq[1])); 3316 3317 if (rc) { 3318 if (rc == H_CLOSED) { 3319 dev_warn(dev, "CRQ Queue closed\n"); 3320 if (adapter->resetting) 3321 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3322 } 3323 3324 dev_warn(dev, "Send error (rc=%d)\n", rc); 3325 } 3326 3327 return rc; 3328 } 3329 3330 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3331 { 3332 union ibmvnic_crq crq; 3333 3334 memset(&crq, 0, sizeof(crq)); 3335 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3336 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3337 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3338 3339 return ibmvnic_send_crq(adapter, &crq); 3340 } 3341 3342 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3343 { 3344 union ibmvnic_crq crq; 3345 3346 memset(&crq, 0, sizeof(crq)); 3347 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3348 crq.version_exchange.cmd = VERSION_EXCHANGE; 3349 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3350 3351 return ibmvnic_send_crq(adapter, &crq); 3352 } 3353 3354 struct vnic_login_client_data { 3355 u8 type; 3356 __be16 len; 3357 char name[]; 3358 } __packed; 3359 3360 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3361 { 3362 int len; 3363 3364 /* Calculate the amount of buffer space needed for the 3365 * vnic client data in the login buffer. There are four entries, 3366 * OS name, LPAR name, device name, and a null last entry. 3367 */ 3368 len = 4 * sizeof(struct vnic_login_client_data); 3369 len += 6; /* "Linux" plus NULL */ 3370 len += strlen(utsname()->nodename) + 1; 3371 len += strlen(adapter->netdev->name) + 1; 3372 3373 return len; 3374 } 3375 3376 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3377 struct vnic_login_client_data *vlcd) 3378 { 3379 const char *os_name = "Linux"; 3380 int len; 3381 3382 /* Type 1 - LPAR OS */ 3383 vlcd->type = 1; 3384 len = strlen(os_name) + 1; 3385 vlcd->len = cpu_to_be16(len); 3386 strncpy(vlcd->name, os_name, len); 3387 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3388 3389 /* Type 2 - LPAR name */ 3390 vlcd->type = 2; 3391 len = strlen(utsname()->nodename) + 1; 3392 vlcd->len = cpu_to_be16(len); 3393 strncpy(vlcd->name, utsname()->nodename, len); 3394 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3395 3396 /* Type 3 - device name */ 3397 vlcd->type = 3; 3398 len = strlen(adapter->netdev->name) + 1; 3399 vlcd->len = cpu_to_be16(len); 3400 strncpy(vlcd->name, adapter->netdev->name, len); 3401 } 3402 3403 static int send_login(struct ibmvnic_adapter *adapter) 3404 { 3405 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3406 struct ibmvnic_login_buffer *login_buffer; 3407 struct device *dev = &adapter->vdev->dev; 3408 dma_addr_t rsp_buffer_token; 3409 dma_addr_t buffer_token; 3410 size_t rsp_buffer_size; 3411 union ibmvnic_crq crq; 3412 size_t buffer_size; 3413 __be64 *tx_list_p; 3414 __be64 *rx_list_p; 3415 int client_data_len; 3416 struct vnic_login_client_data *vlcd; 3417 int i; 3418 3419 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3420 netdev_err(adapter->netdev, 3421 "RX or TX queues are not allocated, device login failed\n"); 3422 return -1; 3423 } 3424 3425 release_login_rsp_buffer(adapter); 3426 client_data_len = vnic_client_data_len(adapter); 3427 3428 buffer_size = 3429 sizeof(struct ibmvnic_login_buffer) + 3430 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3431 client_data_len; 3432 3433 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3434 if (!login_buffer) 3435 goto buf_alloc_failed; 3436 3437 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3438 DMA_TO_DEVICE); 3439 if (dma_mapping_error(dev, buffer_token)) { 3440 dev_err(dev, "Couldn't map login buffer\n"); 3441 goto buf_map_failed; 3442 } 3443 3444 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3445 sizeof(u64) * adapter->req_tx_queues + 3446 sizeof(u64) * adapter->req_rx_queues + 3447 sizeof(u64) * adapter->req_rx_queues + 3448 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3449 3450 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3451 if (!login_rsp_buffer) 3452 goto buf_rsp_alloc_failed; 3453 3454 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3455 rsp_buffer_size, DMA_FROM_DEVICE); 3456 if (dma_mapping_error(dev, rsp_buffer_token)) { 3457 dev_err(dev, "Couldn't map login rsp buffer\n"); 3458 goto buf_rsp_map_failed; 3459 } 3460 3461 adapter->login_buf = login_buffer; 3462 adapter->login_buf_token = buffer_token; 3463 adapter->login_buf_sz = buffer_size; 3464 adapter->login_rsp_buf = login_rsp_buffer; 3465 adapter->login_rsp_buf_token = rsp_buffer_token; 3466 adapter->login_rsp_buf_sz = rsp_buffer_size; 3467 3468 login_buffer->len = cpu_to_be32(buffer_size); 3469 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3470 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3471 login_buffer->off_txcomp_subcrqs = 3472 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3473 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3474 login_buffer->off_rxcomp_subcrqs = 3475 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3476 sizeof(u64) * adapter->req_tx_queues); 3477 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3478 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3479 3480 tx_list_p = (__be64 *)((char *)login_buffer + 3481 sizeof(struct ibmvnic_login_buffer)); 3482 rx_list_p = (__be64 *)((char *)login_buffer + 3483 sizeof(struct ibmvnic_login_buffer) + 3484 sizeof(u64) * adapter->req_tx_queues); 3485 3486 for (i = 0; i < adapter->req_tx_queues; i++) { 3487 if (adapter->tx_scrq[i]) { 3488 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3489 crq_num); 3490 } 3491 } 3492 3493 for (i = 0; i < adapter->req_rx_queues; i++) { 3494 if (adapter->rx_scrq[i]) { 3495 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3496 crq_num); 3497 } 3498 } 3499 3500 /* Insert vNIC login client data */ 3501 vlcd = (struct vnic_login_client_data *) 3502 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3503 login_buffer->client_data_offset = 3504 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3505 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3506 3507 vnic_add_client_data(adapter, vlcd); 3508 3509 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3510 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3511 netdev_dbg(adapter->netdev, "%016lx\n", 3512 ((unsigned long int *)(adapter->login_buf))[i]); 3513 } 3514 3515 memset(&crq, 0, sizeof(crq)); 3516 crq.login.first = IBMVNIC_CRQ_CMD; 3517 crq.login.cmd = LOGIN; 3518 crq.login.ioba = cpu_to_be32(buffer_token); 3519 crq.login.len = cpu_to_be32(buffer_size); 3520 ibmvnic_send_crq(adapter, &crq); 3521 3522 return 0; 3523 3524 buf_rsp_map_failed: 3525 kfree(login_rsp_buffer); 3526 buf_rsp_alloc_failed: 3527 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3528 buf_map_failed: 3529 kfree(login_buffer); 3530 buf_alloc_failed: 3531 return -1; 3532 } 3533 3534 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3535 u32 len, u8 map_id) 3536 { 3537 union ibmvnic_crq crq; 3538 3539 memset(&crq, 0, sizeof(crq)); 3540 crq.request_map.first = IBMVNIC_CRQ_CMD; 3541 crq.request_map.cmd = REQUEST_MAP; 3542 crq.request_map.map_id = map_id; 3543 crq.request_map.ioba = cpu_to_be32(addr); 3544 crq.request_map.len = cpu_to_be32(len); 3545 return ibmvnic_send_crq(adapter, &crq); 3546 } 3547 3548 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3549 { 3550 union ibmvnic_crq crq; 3551 3552 memset(&crq, 0, sizeof(crq)); 3553 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3554 crq.request_unmap.cmd = REQUEST_UNMAP; 3555 crq.request_unmap.map_id = map_id; 3556 return ibmvnic_send_crq(adapter, &crq); 3557 } 3558 3559 static void send_map_query(struct ibmvnic_adapter *adapter) 3560 { 3561 union ibmvnic_crq crq; 3562 3563 memset(&crq, 0, sizeof(crq)); 3564 crq.query_map.first = IBMVNIC_CRQ_CMD; 3565 crq.query_map.cmd = QUERY_MAP; 3566 ibmvnic_send_crq(adapter, &crq); 3567 } 3568 3569 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3570 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3571 { 3572 union ibmvnic_crq crq; 3573 3574 atomic_set(&adapter->running_cap_crqs, 0); 3575 memset(&crq, 0, sizeof(crq)); 3576 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3577 crq.query_capability.cmd = QUERY_CAPABILITY; 3578 3579 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3580 atomic_inc(&adapter->running_cap_crqs); 3581 ibmvnic_send_crq(adapter, &crq); 3582 3583 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3584 atomic_inc(&adapter->running_cap_crqs); 3585 ibmvnic_send_crq(adapter, &crq); 3586 3587 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3588 atomic_inc(&adapter->running_cap_crqs); 3589 ibmvnic_send_crq(adapter, &crq); 3590 3591 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3592 atomic_inc(&adapter->running_cap_crqs); 3593 ibmvnic_send_crq(adapter, &crq); 3594 3595 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3596 atomic_inc(&adapter->running_cap_crqs); 3597 ibmvnic_send_crq(adapter, &crq); 3598 3599 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3600 atomic_inc(&adapter->running_cap_crqs); 3601 ibmvnic_send_crq(adapter, &crq); 3602 3603 crq.query_capability.capability = 3604 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3605 atomic_inc(&adapter->running_cap_crqs); 3606 ibmvnic_send_crq(adapter, &crq); 3607 3608 crq.query_capability.capability = 3609 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3610 atomic_inc(&adapter->running_cap_crqs); 3611 ibmvnic_send_crq(adapter, &crq); 3612 3613 crq.query_capability.capability = 3614 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3615 atomic_inc(&adapter->running_cap_crqs); 3616 ibmvnic_send_crq(adapter, &crq); 3617 3618 crq.query_capability.capability = 3619 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3620 atomic_inc(&adapter->running_cap_crqs); 3621 ibmvnic_send_crq(adapter, &crq); 3622 3623 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3624 atomic_inc(&adapter->running_cap_crqs); 3625 ibmvnic_send_crq(adapter, &crq); 3626 3627 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3628 atomic_inc(&adapter->running_cap_crqs); 3629 ibmvnic_send_crq(adapter, &crq); 3630 3631 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3632 atomic_inc(&adapter->running_cap_crqs); 3633 ibmvnic_send_crq(adapter, &crq); 3634 3635 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3636 atomic_inc(&adapter->running_cap_crqs); 3637 ibmvnic_send_crq(adapter, &crq); 3638 3639 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3640 atomic_inc(&adapter->running_cap_crqs); 3641 ibmvnic_send_crq(adapter, &crq); 3642 3643 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3644 atomic_inc(&adapter->running_cap_crqs); 3645 ibmvnic_send_crq(adapter, &crq); 3646 3647 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3648 atomic_inc(&adapter->running_cap_crqs); 3649 ibmvnic_send_crq(adapter, &crq); 3650 3651 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3652 atomic_inc(&adapter->running_cap_crqs); 3653 ibmvnic_send_crq(adapter, &crq); 3654 3655 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3656 atomic_inc(&adapter->running_cap_crqs); 3657 ibmvnic_send_crq(adapter, &crq); 3658 3659 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3660 atomic_inc(&adapter->running_cap_crqs); 3661 ibmvnic_send_crq(adapter, &crq); 3662 3663 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3664 atomic_inc(&adapter->running_cap_crqs); 3665 ibmvnic_send_crq(adapter, &crq); 3666 3667 crq.query_capability.capability = 3668 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3669 atomic_inc(&adapter->running_cap_crqs); 3670 ibmvnic_send_crq(adapter, &crq); 3671 3672 crq.query_capability.capability = 3673 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3674 atomic_inc(&adapter->running_cap_crqs); 3675 ibmvnic_send_crq(adapter, &crq); 3676 3677 crq.query_capability.capability = 3678 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3679 atomic_inc(&adapter->running_cap_crqs); 3680 ibmvnic_send_crq(adapter, &crq); 3681 3682 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3683 atomic_inc(&adapter->running_cap_crqs); 3684 ibmvnic_send_crq(adapter, &crq); 3685 } 3686 3687 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3688 struct ibmvnic_adapter *adapter) 3689 { 3690 struct device *dev = &adapter->vdev->dev; 3691 3692 if (crq->get_vpd_size_rsp.rc.code) { 3693 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3694 crq->get_vpd_size_rsp.rc.code); 3695 complete(&adapter->fw_done); 3696 return; 3697 } 3698 3699 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3700 complete(&adapter->fw_done); 3701 } 3702 3703 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3704 struct ibmvnic_adapter *adapter) 3705 { 3706 struct device *dev = &adapter->vdev->dev; 3707 unsigned char *substr = NULL; 3708 u8 fw_level_len = 0; 3709 3710 memset(adapter->fw_version, 0, 32); 3711 3712 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3713 DMA_FROM_DEVICE); 3714 3715 if (crq->get_vpd_rsp.rc.code) { 3716 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3717 crq->get_vpd_rsp.rc.code); 3718 goto complete; 3719 } 3720 3721 /* get the position of the firmware version info 3722 * located after the ASCII 'RM' substring in the buffer 3723 */ 3724 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3725 if (!substr) { 3726 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3727 goto complete; 3728 } 3729 3730 /* get length of firmware level ASCII substring */ 3731 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3732 fw_level_len = *(substr + 2); 3733 } else { 3734 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3735 goto complete; 3736 } 3737 3738 /* copy firmware version string from vpd into adapter */ 3739 if ((substr + 3 + fw_level_len) < 3740 (adapter->vpd->buff + adapter->vpd->len)) { 3741 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3742 } else { 3743 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3744 } 3745 3746 complete: 3747 if (adapter->fw_version[0] == '\0') 3748 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3749 complete(&adapter->fw_done); 3750 } 3751 3752 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3753 { 3754 struct device *dev = &adapter->vdev->dev; 3755 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3756 netdev_features_t old_hw_features = 0; 3757 union ibmvnic_crq crq; 3758 int i; 3759 3760 dma_unmap_single(dev, adapter->ip_offload_tok, 3761 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3762 3763 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3764 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3765 netdev_dbg(adapter->netdev, "%016lx\n", 3766 ((unsigned long int *)(buf))[i]); 3767 3768 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3769 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3770 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3771 buf->tcp_ipv4_chksum); 3772 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3773 buf->tcp_ipv6_chksum); 3774 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3775 buf->udp_ipv4_chksum); 3776 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3777 buf->udp_ipv6_chksum); 3778 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3779 buf->large_tx_ipv4); 3780 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3781 buf->large_tx_ipv6); 3782 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3783 buf->large_rx_ipv4); 3784 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3785 buf->large_rx_ipv6); 3786 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3787 buf->max_ipv4_header_size); 3788 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3789 buf->max_ipv6_header_size); 3790 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3791 buf->max_tcp_header_size); 3792 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3793 buf->max_udp_header_size); 3794 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3795 buf->max_large_tx_size); 3796 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3797 buf->max_large_rx_size); 3798 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3799 buf->ipv6_extension_header); 3800 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3801 buf->tcp_pseudosum_req); 3802 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3803 buf->num_ipv6_ext_headers); 3804 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3805 buf->off_ipv6_ext_headers); 3806 3807 adapter->ip_offload_ctrl_tok = 3808 dma_map_single(dev, &adapter->ip_offload_ctrl, 3809 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3810 3811 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3812 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3813 return; 3814 } 3815 3816 adapter->ip_offload_ctrl.len = 3817 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3818 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3819 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3820 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3821 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3822 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3823 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3824 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3825 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3826 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3827 3828 /* large_rx disabled for now, additional features needed */ 3829 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3830 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3831 3832 if (adapter->state != VNIC_PROBING) { 3833 old_hw_features = adapter->netdev->hw_features; 3834 adapter->netdev->hw_features = 0; 3835 } 3836 3837 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 3838 3839 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3840 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 3841 3842 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3843 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 3844 3845 if ((adapter->netdev->features & 3846 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3847 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 3848 3849 if (buf->large_tx_ipv4) 3850 adapter->netdev->hw_features |= NETIF_F_TSO; 3851 if (buf->large_tx_ipv6) 3852 adapter->netdev->hw_features |= NETIF_F_TSO6; 3853 3854 if (adapter->state == VNIC_PROBING) { 3855 adapter->netdev->features |= adapter->netdev->hw_features; 3856 } else if (old_hw_features != adapter->netdev->hw_features) { 3857 netdev_features_t tmp = 0; 3858 3859 /* disable features no longer supported */ 3860 adapter->netdev->features &= adapter->netdev->hw_features; 3861 /* turn on features now supported if previously enabled */ 3862 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 3863 adapter->netdev->hw_features; 3864 adapter->netdev->features |= 3865 tmp & adapter->netdev->wanted_features; 3866 } 3867 3868 memset(&crq, 0, sizeof(crq)); 3869 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3870 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3871 crq.control_ip_offload.len = 3872 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3873 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3874 ibmvnic_send_crq(adapter, &crq); 3875 } 3876 3877 static const char *ibmvnic_fw_err_cause(u16 cause) 3878 { 3879 switch (cause) { 3880 case ADAPTER_PROBLEM: 3881 return "adapter problem"; 3882 case BUS_PROBLEM: 3883 return "bus problem"; 3884 case FW_PROBLEM: 3885 return "firmware problem"; 3886 case DD_PROBLEM: 3887 return "device driver problem"; 3888 case EEH_RECOVERY: 3889 return "EEH recovery"; 3890 case FW_UPDATED: 3891 return "firmware updated"; 3892 case LOW_MEMORY: 3893 return "low Memory"; 3894 default: 3895 return "unknown"; 3896 } 3897 } 3898 3899 static void handle_error_indication(union ibmvnic_crq *crq, 3900 struct ibmvnic_adapter *adapter) 3901 { 3902 struct device *dev = &adapter->vdev->dev; 3903 u16 cause; 3904 3905 cause = be16_to_cpu(crq->error_indication.error_cause); 3906 3907 dev_warn_ratelimited(dev, 3908 "Firmware reports %serror, cause: %s. Starting recovery...\n", 3909 crq->error_indication.flags 3910 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3911 ibmvnic_fw_err_cause(cause)); 3912 3913 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3914 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3915 else 3916 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3917 } 3918 3919 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3920 struct ibmvnic_adapter *adapter) 3921 { 3922 struct net_device *netdev = adapter->netdev; 3923 struct device *dev = &adapter->vdev->dev; 3924 long rc; 3925 3926 rc = crq->change_mac_addr_rsp.rc.code; 3927 if (rc) { 3928 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3929 goto out; 3930 } 3931 ether_addr_copy(netdev->dev_addr, 3932 &crq->change_mac_addr_rsp.mac_addr[0]); 3933 out: 3934 complete(&adapter->fw_done); 3935 return rc; 3936 } 3937 3938 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3939 struct ibmvnic_adapter *adapter) 3940 { 3941 struct device *dev = &adapter->vdev->dev; 3942 u64 *req_value; 3943 char *name; 3944 3945 atomic_dec(&adapter->running_cap_crqs); 3946 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3947 case REQ_TX_QUEUES: 3948 req_value = &adapter->req_tx_queues; 3949 name = "tx"; 3950 break; 3951 case REQ_RX_QUEUES: 3952 req_value = &adapter->req_rx_queues; 3953 name = "rx"; 3954 break; 3955 case REQ_RX_ADD_QUEUES: 3956 req_value = &adapter->req_rx_add_queues; 3957 name = "rx_add"; 3958 break; 3959 case REQ_TX_ENTRIES_PER_SUBCRQ: 3960 req_value = &adapter->req_tx_entries_per_subcrq; 3961 name = "tx_entries_per_subcrq"; 3962 break; 3963 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3964 req_value = &adapter->req_rx_add_entries_per_subcrq; 3965 name = "rx_add_entries_per_subcrq"; 3966 break; 3967 case REQ_MTU: 3968 req_value = &adapter->req_mtu; 3969 name = "mtu"; 3970 break; 3971 case PROMISC_REQUESTED: 3972 req_value = &adapter->promisc; 3973 name = "promisc"; 3974 break; 3975 default: 3976 dev_err(dev, "Got invalid cap request rsp %d\n", 3977 crq->request_capability.capability); 3978 return; 3979 } 3980 3981 switch (crq->request_capability_rsp.rc.code) { 3982 case SUCCESS: 3983 break; 3984 case PARTIALSUCCESS: 3985 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3986 *req_value, 3987 (long int)be64_to_cpu(crq->request_capability_rsp. 3988 number), name); 3989 3990 if (be16_to_cpu(crq->request_capability_rsp.capability) == 3991 REQ_MTU) { 3992 pr_err("mtu of %llu is not supported. Reverting.\n", 3993 *req_value); 3994 *req_value = adapter->fallback.mtu; 3995 } else { 3996 *req_value = 3997 be64_to_cpu(crq->request_capability_rsp.number); 3998 } 3999 4000 ibmvnic_send_req_caps(adapter, 1); 4001 return; 4002 default: 4003 dev_err(dev, "Error %d in request cap rsp\n", 4004 crq->request_capability_rsp.rc.code); 4005 return; 4006 } 4007 4008 /* Done receiving requested capabilities, query IP offload support */ 4009 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4010 union ibmvnic_crq newcrq; 4011 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4012 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4013 &adapter->ip_offload_buf; 4014 4015 adapter->wait_capability = false; 4016 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4017 buf_sz, 4018 DMA_FROM_DEVICE); 4019 4020 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4021 if (!firmware_has_feature(FW_FEATURE_CMO)) 4022 dev_err(dev, "Couldn't map offload buffer\n"); 4023 return; 4024 } 4025 4026 memset(&newcrq, 0, sizeof(newcrq)); 4027 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4028 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4029 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4030 newcrq.query_ip_offload.ioba = 4031 cpu_to_be32(adapter->ip_offload_tok); 4032 4033 ibmvnic_send_crq(adapter, &newcrq); 4034 } 4035 } 4036 4037 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4038 struct ibmvnic_adapter *adapter) 4039 { 4040 struct device *dev = &adapter->vdev->dev; 4041 struct net_device *netdev = adapter->netdev; 4042 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4043 struct ibmvnic_login_buffer *login = adapter->login_buf; 4044 int i; 4045 4046 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4047 DMA_TO_DEVICE); 4048 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4049 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4050 4051 /* If the number of queues requested can't be allocated by the 4052 * server, the login response will return with code 1. We will need 4053 * to resend the login buffer with fewer queues requested. 4054 */ 4055 if (login_rsp_crq->generic.rc.code) { 4056 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4057 complete(&adapter->init_done); 4058 return 0; 4059 } 4060 4061 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4062 4063 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4064 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4065 netdev_dbg(adapter->netdev, "%016lx\n", 4066 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4067 } 4068 4069 /* Sanity checks */ 4070 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4071 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4072 adapter->req_rx_add_queues != 4073 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4074 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4075 ibmvnic_remove(adapter->vdev); 4076 return -EIO; 4077 } 4078 release_login_buffer(adapter); 4079 complete(&adapter->init_done); 4080 4081 return 0; 4082 } 4083 4084 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4085 struct ibmvnic_adapter *adapter) 4086 { 4087 struct device *dev = &adapter->vdev->dev; 4088 long rc; 4089 4090 rc = crq->request_unmap_rsp.rc.code; 4091 if (rc) 4092 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4093 } 4094 4095 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4096 struct ibmvnic_adapter *adapter) 4097 { 4098 struct net_device *netdev = adapter->netdev; 4099 struct device *dev = &adapter->vdev->dev; 4100 long rc; 4101 4102 rc = crq->query_map_rsp.rc.code; 4103 if (rc) { 4104 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4105 return; 4106 } 4107 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4108 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4109 crq->query_map_rsp.free_pages); 4110 } 4111 4112 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4113 struct ibmvnic_adapter *adapter) 4114 { 4115 struct net_device *netdev = adapter->netdev; 4116 struct device *dev = &adapter->vdev->dev; 4117 long rc; 4118 4119 atomic_dec(&adapter->running_cap_crqs); 4120 netdev_dbg(netdev, "Outstanding queries: %d\n", 4121 atomic_read(&adapter->running_cap_crqs)); 4122 rc = crq->query_capability.rc.code; 4123 if (rc) { 4124 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4125 goto out; 4126 } 4127 4128 switch (be16_to_cpu(crq->query_capability.capability)) { 4129 case MIN_TX_QUEUES: 4130 adapter->min_tx_queues = 4131 be64_to_cpu(crq->query_capability.number); 4132 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4133 adapter->min_tx_queues); 4134 break; 4135 case MIN_RX_QUEUES: 4136 adapter->min_rx_queues = 4137 be64_to_cpu(crq->query_capability.number); 4138 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4139 adapter->min_rx_queues); 4140 break; 4141 case MIN_RX_ADD_QUEUES: 4142 adapter->min_rx_add_queues = 4143 be64_to_cpu(crq->query_capability.number); 4144 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4145 adapter->min_rx_add_queues); 4146 break; 4147 case MAX_TX_QUEUES: 4148 adapter->max_tx_queues = 4149 be64_to_cpu(crq->query_capability.number); 4150 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4151 adapter->max_tx_queues); 4152 break; 4153 case MAX_RX_QUEUES: 4154 adapter->max_rx_queues = 4155 be64_to_cpu(crq->query_capability.number); 4156 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4157 adapter->max_rx_queues); 4158 break; 4159 case MAX_RX_ADD_QUEUES: 4160 adapter->max_rx_add_queues = 4161 be64_to_cpu(crq->query_capability.number); 4162 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4163 adapter->max_rx_add_queues); 4164 break; 4165 case MIN_TX_ENTRIES_PER_SUBCRQ: 4166 adapter->min_tx_entries_per_subcrq = 4167 be64_to_cpu(crq->query_capability.number); 4168 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4169 adapter->min_tx_entries_per_subcrq); 4170 break; 4171 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4172 adapter->min_rx_add_entries_per_subcrq = 4173 be64_to_cpu(crq->query_capability.number); 4174 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4175 adapter->min_rx_add_entries_per_subcrq); 4176 break; 4177 case MAX_TX_ENTRIES_PER_SUBCRQ: 4178 adapter->max_tx_entries_per_subcrq = 4179 be64_to_cpu(crq->query_capability.number); 4180 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4181 adapter->max_tx_entries_per_subcrq); 4182 break; 4183 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4184 adapter->max_rx_add_entries_per_subcrq = 4185 be64_to_cpu(crq->query_capability.number); 4186 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4187 adapter->max_rx_add_entries_per_subcrq); 4188 break; 4189 case TCP_IP_OFFLOAD: 4190 adapter->tcp_ip_offload = 4191 be64_to_cpu(crq->query_capability.number); 4192 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4193 adapter->tcp_ip_offload); 4194 break; 4195 case PROMISC_SUPPORTED: 4196 adapter->promisc_supported = 4197 be64_to_cpu(crq->query_capability.number); 4198 netdev_dbg(netdev, "promisc_supported = %lld\n", 4199 adapter->promisc_supported); 4200 break; 4201 case MIN_MTU: 4202 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4203 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4204 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4205 break; 4206 case MAX_MTU: 4207 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4208 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4209 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4210 break; 4211 case MAX_MULTICAST_FILTERS: 4212 adapter->max_multicast_filters = 4213 be64_to_cpu(crq->query_capability.number); 4214 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4215 adapter->max_multicast_filters); 4216 break; 4217 case VLAN_HEADER_INSERTION: 4218 adapter->vlan_header_insertion = 4219 be64_to_cpu(crq->query_capability.number); 4220 if (adapter->vlan_header_insertion) 4221 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4222 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4223 adapter->vlan_header_insertion); 4224 break; 4225 case RX_VLAN_HEADER_INSERTION: 4226 adapter->rx_vlan_header_insertion = 4227 be64_to_cpu(crq->query_capability.number); 4228 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4229 adapter->rx_vlan_header_insertion); 4230 break; 4231 case MAX_TX_SG_ENTRIES: 4232 adapter->max_tx_sg_entries = 4233 be64_to_cpu(crq->query_capability.number); 4234 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4235 adapter->max_tx_sg_entries); 4236 break; 4237 case RX_SG_SUPPORTED: 4238 adapter->rx_sg_supported = 4239 be64_to_cpu(crq->query_capability.number); 4240 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4241 adapter->rx_sg_supported); 4242 break; 4243 case OPT_TX_COMP_SUB_QUEUES: 4244 adapter->opt_tx_comp_sub_queues = 4245 be64_to_cpu(crq->query_capability.number); 4246 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4247 adapter->opt_tx_comp_sub_queues); 4248 break; 4249 case OPT_RX_COMP_QUEUES: 4250 adapter->opt_rx_comp_queues = 4251 be64_to_cpu(crq->query_capability.number); 4252 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4253 adapter->opt_rx_comp_queues); 4254 break; 4255 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4256 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4257 be64_to_cpu(crq->query_capability.number); 4258 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4259 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4260 break; 4261 case OPT_TX_ENTRIES_PER_SUBCRQ: 4262 adapter->opt_tx_entries_per_subcrq = 4263 be64_to_cpu(crq->query_capability.number); 4264 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4265 adapter->opt_tx_entries_per_subcrq); 4266 break; 4267 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4268 adapter->opt_rxba_entries_per_subcrq = 4269 be64_to_cpu(crq->query_capability.number); 4270 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4271 adapter->opt_rxba_entries_per_subcrq); 4272 break; 4273 case TX_RX_DESC_REQ: 4274 adapter->tx_rx_desc_req = crq->query_capability.number; 4275 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4276 adapter->tx_rx_desc_req); 4277 break; 4278 4279 default: 4280 netdev_err(netdev, "Got invalid cap rsp %d\n", 4281 crq->query_capability.capability); 4282 } 4283 4284 out: 4285 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4286 adapter->wait_capability = false; 4287 ibmvnic_send_req_caps(adapter, 0); 4288 } 4289 } 4290 4291 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4292 { 4293 union ibmvnic_crq crq; 4294 int rc; 4295 4296 memset(&crq, 0, sizeof(crq)); 4297 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4298 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4299 init_completion(&adapter->fw_done); 4300 rc = ibmvnic_send_crq(adapter, &crq); 4301 if (rc) 4302 return rc; 4303 wait_for_completion(&adapter->fw_done); 4304 return adapter->fw_done_rc ? -EIO : 0; 4305 } 4306 4307 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4308 struct ibmvnic_adapter *adapter) 4309 { 4310 struct net_device *netdev = adapter->netdev; 4311 int rc; 4312 4313 rc = crq->query_phys_parms_rsp.rc.code; 4314 if (rc) { 4315 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4316 return rc; 4317 } 4318 switch (cpu_to_be32(crq->query_phys_parms_rsp.speed)) { 4319 case IBMVNIC_10MBPS: 4320 adapter->speed = SPEED_10; 4321 break; 4322 case IBMVNIC_100MBPS: 4323 adapter->speed = SPEED_100; 4324 break; 4325 case IBMVNIC_1GBPS: 4326 adapter->speed = SPEED_1000; 4327 break; 4328 case IBMVNIC_10GBP: 4329 adapter->speed = SPEED_10000; 4330 break; 4331 case IBMVNIC_25GBPS: 4332 adapter->speed = SPEED_25000; 4333 break; 4334 case IBMVNIC_40GBPS: 4335 adapter->speed = SPEED_40000; 4336 break; 4337 case IBMVNIC_50GBPS: 4338 adapter->speed = SPEED_50000; 4339 break; 4340 case IBMVNIC_100GBPS: 4341 adapter->speed = SPEED_100000; 4342 break; 4343 default: 4344 netdev_warn(netdev, "Unknown speed 0x%08x\n", 4345 cpu_to_be32(crq->query_phys_parms_rsp.speed)); 4346 adapter->speed = SPEED_UNKNOWN; 4347 } 4348 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4349 adapter->duplex = DUPLEX_FULL; 4350 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4351 adapter->duplex = DUPLEX_HALF; 4352 else 4353 adapter->duplex = DUPLEX_UNKNOWN; 4354 4355 return rc; 4356 } 4357 4358 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4359 struct ibmvnic_adapter *adapter) 4360 { 4361 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4362 struct net_device *netdev = adapter->netdev; 4363 struct device *dev = &adapter->vdev->dev; 4364 u64 *u64_crq = (u64 *)crq; 4365 long rc; 4366 4367 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4368 (unsigned long int)cpu_to_be64(u64_crq[0]), 4369 (unsigned long int)cpu_to_be64(u64_crq[1])); 4370 switch (gen_crq->first) { 4371 case IBMVNIC_CRQ_INIT_RSP: 4372 switch (gen_crq->cmd) { 4373 case IBMVNIC_CRQ_INIT: 4374 dev_info(dev, "Partner initialized\n"); 4375 adapter->from_passive_init = true; 4376 adapter->failover_pending = false; 4377 if (!completion_done(&adapter->init_done)) { 4378 complete(&adapter->init_done); 4379 adapter->init_done_rc = -EIO; 4380 } 4381 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4382 break; 4383 case IBMVNIC_CRQ_INIT_COMPLETE: 4384 dev_info(dev, "Partner initialization complete\n"); 4385 adapter->crq.active = true; 4386 send_version_xchg(adapter); 4387 break; 4388 default: 4389 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4390 } 4391 return; 4392 case IBMVNIC_CRQ_XPORT_EVENT: 4393 netif_carrier_off(netdev); 4394 adapter->crq.active = false; 4395 if (adapter->resetting) 4396 adapter->force_reset_recovery = true; 4397 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4398 dev_info(dev, "Migrated, re-enabling adapter\n"); 4399 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4400 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4401 dev_info(dev, "Backing device failover detected\n"); 4402 adapter->failover_pending = true; 4403 } else { 4404 /* The adapter lost the connection */ 4405 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4406 gen_crq->cmd); 4407 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4408 } 4409 return; 4410 case IBMVNIC_CRQ_CMD_RSP: 4411 break; 4412 default: 4413 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4414 gen_crq->first); 4415 return; 4416 } 4417 4418 switch (gen_crq->cmd) { 4419 case VERSION_EXCHANGE_RSP: 4420 rc = crq->version_exchange_rsp.rc.code; 4421 if (rc) { 4422 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4423 break; 4424 } 4425 dev_info(dev, "Partner protocol version is %d\n", 4426 crq->version_exchange_rsp.version); 4427 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4428 ibmvnic_version) 4429 ibmvnic_version = 4430 be16_to_cpu(crq->version_exchange_rsp.version); 4431 send_cap_queries(adapter); 4432 break; 4433 case QUERY_CAPABILITY_RSP: 4434 handle_query_cap_rsp(crq, adapter); 4435 break; 4436 case QUERY_MAP_RSP: 4437 handle_query_map_rsp(crq, adapter); 4438 break; 4439 case REQUEST_MAP_RSP: 4440 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4441 complete(&adapter->fw_done); 4442 break; 4443 case REQUEST_UNMAP_RSP: 4444 handle_request_unmap_rsp(crq, adapter); 4445 break; 4446 case REQUEST_CAPABILITY_RSP: 4447 handle_request_cap_rsp(crq, adapter); 4448 break; 4449 case LOGIN_RSP: 4450 netdev_dbg(netdev, "Got Login Response\n"); 4451 handle_login_rsp(crq, adapter); 4452 break; 4453 case LOGICAL_LINK_STATE_RSP: 4454 netdev_dbg(netdev, 4455 "Got Logical Link State Response, state: %d rc: %d\n", 4456 crq->logical_link_state_rsp.link_state, 4457 crq->logical_link_state_rsp.rc.code); 4458 adapter->logical_link_state = 4459 crq->logical_link_state_rsp.link_state; 4460 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4461 complete(&adapter->init_done); 4462 break; 4463 case LINK_STATE_INDICATION: 4464 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4465 adapter->phys_link_state = 4466 crq->link_state_indication.phys_link_state; 4467 adapter->logical_link_state = 4468 crq->link_state_indication.logical_link_state; 4469 if (adapter->phys_link_state && adapter->logical_link_state) 4470 netif_carrier_on(netdev); 4471 else 4472 netif_carrier_off(netdev); 4473 break; 4474 case CHANGE_MAC_ADDR_RSP: 4475 netdev_dbg(netdev, "Got MAC address change Response\n"); 4476 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4477 break; 4478 case ERROR_INDICATION: 4479 netdev_dbg(netdev, "Got Error Indication\n"); 4480 handle_error_indication(crq, adapter); 4481 break; 4482 case REQUEST_STATISTICS_RSP: 4483 netdev_dbg(netdev, "Got Statistics Response\n"); 4484 complete(&adapter->stats_done); 4485 break; 4486 case QUERY_IP_OFFLOAD_RSP: 4487 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4488 handle_query_ip_offload_rsp(adapter); 4489 break; 4490 case MULTICAST_CTRL_RSP: 4491 netdev_dbg(netdev, "Got multicast control Response\n"); 4492 break; 4493 case CONTROL_IP_OFFLOAD_RSP: 4494 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4495 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4496 sizeof(adapter->ip_offload_ctrl), 4497 DMA_TO_DEVICE); 4498 complete(&adapter->init_done); 4499 break; 4500 case COLLECT_FW_TRACE_RSP: 4501 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4502 complete(&adapter->fw_done); 4503 break; 4504 case GET_VPD_SIZE_RSP: 4505 handle_vpd_size_rsp(crq, adapter); 4506 break; 4507 case GET_VPD_RSP: 4508 handle_vpd_rsp(crq, adapter); 4509 break; 4510 case QUERY_PHYS_PARMS_RSP: 4511 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4512 complete(&adapter->fw_done); 4513 break; 4514 default: 4515 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4516 gen_crq->cmd); 4517 } 4518 } 4519 4520 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4521 { 4522 struct ibmvnic_adapter *adapter = instance; 4523 4524 tasklet_schedule(&adapter->tasklet); 4525 return IRQ_HANDLED; 4526 } 4527 4528 static void ibmvnic_tasklet(void *data) 4529 { 4530 struct ibmvnic_adapter *adapter = data; 4531 struct ibmvnic_crq_queue *queue = &adapter->crq; 4532 union ibmvnic_crq *crq; 4533 unsigned long flags; 4534 bool done = false; 4535 4536 spin_lock_irqsave(&queue->lock, flags); 4537 while (!done) { 4538 /* Pull all the valid messages off the CRQ */ 4539 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4540 ibmvnic_handle_crq(crq, adapter); 4541 crq->generic.first = 0; 4542 } 4543 4544 /* remain in tasklet until all 4545 * capabilities responses are received 4546 */ 4547 if (!adapter->wait_capability) 4548 done = true; 4549 } 4550 /* if capabilities CRQ's were sent in this tasklet, the following 4551 * tasklet must wait until all responses are received 4552 */ 4553 if (atomic_read(&adapter->running_cap_crqs) != 0) 4554 adapter->wait_capability = true; 4555 spin_unlock_irqrestore(&queue->lock, flags); 4556 } 4557 4558 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4559 { 4560 struct vio_dev *vdev = adapter->vdev; 4561 int rc; 4562 4563 do { 4564 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4565 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4566 4567 if (rc) 4568 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4569 4570 return rc; 4571 } 4572 4573 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4574 { 4575 struct ibmvnic_crq_queue *crq = &adapter->crq; 4576 struct device *dev = &adapter->vdev->dev; 4577 struct vio_dev *vdev = adapter->vdev; 4578 int rc; 4579 4580 /* Close the CRQ */ 4581 do { 4582 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4583 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4584 4585 /* Clean out the queue */ 4586 memset(crq->msgs, 0, PAGE_SIZE); 4587 crq->cur = 0; 4588 crq->active = false; 4589 4590 /* And re-open it again */ 4591 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4592 crq->msg_token, PAGE_SIZE); 4593 4594 if (rc == H_CLOSED) 4595 /* Adapter is good, but other end is not ready */ 4596 dev_warn(dev, "Partner adapter not ready\n"); 4597 else if (rc != 0) 4598 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4599 4600 return rc; 4601 } 4602 4603 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4604 { 4605 struct ibmvnic_crq_queue *crq = &adapter->crq; 4606 struct vio_dev *vdev = adapter->vdev; 4607 long rc; 4608 4609 if (!crq->msgs) 4610 return; 4611 4612 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4613 free_irq(vdev->irq, adapter); 4614 tasklet_kill(&adapter->tasklet); 4615 do { 4616 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4617 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4618 4619 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4620 DMA_BIDIRECTIONAL); 4621 free_page((unsigned long)crq->msgs); 4622 crq->msgs = NULL; 4623 crq->active = false; 4624 } 4625 4626 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4627 { 4628 struct ibmvnic_crq_queue *crq = &adapter->crq; 4629 struct device *dev = &adapter->vdev->dev; 4630 struct vio_dev *vdev = adapter->vdev; 4631 int rc, retrc = -ENOMEM; 4632 4633 if (crq->msgs) 4634 return 0; 4635 4636 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4637 /* Should we allocate more than one page? */ 4638 4639 if (!crq->msgs) 4640 return -ENOMEM; 4641 4642 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4643 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4644 DMA_BIDIRECTIONAL); 4645 if (dma_mapping_error(dev, crq->msg_token)) 4646 goto map_failed; 4647 4648 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4649 crq->msg_token, PAGE_SIZE); 4650 4651 if (rc == H_RESOURCE) 4652 /* maybe kexecing and resource is busy. try a reset */ 4653 rc = ibmvnic_reset_crq(adapter); 4654 retrc = rc; 4655 4656 if (rc == H_CLOSED) { 4657 dev_warn(dev, "Partner adapter not ready\n"); 4658 } else if (rc) { 4659 dev_warn(dev, "Error %d opening adapter\n", rc); 4660 goto reg_crq_failed; 4661 } 4662 4663 retrc = 0; 4664 4665 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4666 (unsigned long)adapter); 4667 4668 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4669 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 4670 adapter->vdev->unit_address); 4671 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 4672 if (rc) { 4673 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4674 vdev->irq, rc); 4675 goto req_irq_failed; 4676 } 4677 4678 rc = vio_enable_interrupts(vdev); 4679 if (rc) { 4680 dev_err(dev, "Error %d enabling interrupts\n", rc); 4681 goto req_irq_failed; 4682 } 4683 4684 crq->cur = 0; 4685 spin_lock_init(&crq->lock); 4686 4687 return retrc; 4688 4689 req_irq_failed: 4690 tasklet_kill(&adapter->tasklet); 4691 do { 4692 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4693 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4694 reg_crq_failed: 4695 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4696 map_failed: 4697 free_page((unsigned long)crq->msgs); 4698 crq->msgs = NULL; 4699 return retrc; 4700 } 4701 4702 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4703 { 4704 struct device *dev = &adapter->vdev->dev; 4705 unsigned long timeout = msecs_to_jiffies(30000); 4706 u64 old_num_rx_queues, old_num_tx_queues; 4707 int rc; 4708 4709 adapter->from_passive_init = false; 4710 4711 old_num_rx_queues = adapter->req_rx_queues; 4712 old_num_tx_queues = adapter->req_tx_queues; 4713 4714 reinit_completion(&adapter->init_done); 4715 adapter->init_done_rc = 0; 4716 ibmvnic_send_crq_init(adapter); 4717 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4718 dev_err(dev, "Initialization sequence timed out\n"); 4719 return -1; 4720 } 4721 4722 if (adapter->init_done_rc) { 4723 release_crq_queue(adapter); 4724 return adapter->init_done_rc; 4725 } 4726 4727 if (adapter->from_passive_init) { 4728 adapter->state = VNIC_OPEN; 4729 adapter->from_passive_init = false; 4730 return -1; 4731 } 4732 4733 if (adapter->resetting && !adapter->wait_for_reset && 4734 adapter->reset_reason != VNIC_RESET_MOBILITY) { 4735 if (adapter->req_rx_queues != old_num_rx_queues || 4736 adapter->req_tx_queues != old_num_tx_queues) { 4737 release_sub_crqs(adapter, 0); 4738 rc = init_sub_crqs(adapter); 4739 } else { 4740 rc = reset_sub_crq_queues(adapter); 4741 } 4742 } else { 4743 rc = init_sub_crqs(adapter); 4744 } 4745 4746 if (rc) { 4747 dev_err(dev, "Initialization of sub crqs failed\n"); 4748 release_crq_queue(adapter); 4749 return rc; 4750 } 4751 4752 rc = init_sub_crq_irqs(adapter); 4753 if (rc) { 4754 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4755 release_crq_queue(adapter); 4756 } 4757 4758 return rc; 4759 } 4760 4761 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4762 { 4763 struct device *dev = &adapter->vdev->dev; 4764 unsigned long timeout = msecs_to_jiffies(30000); 4765 int rc; 4766 4767 adapter->from_passive_init = false; 4768 4769 adapter->init_done_rc = 0; 4770 ibmvnic_send_crq_init(adapter); 4771 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4772 dev_err(dev, "Initialization sequence timed out\n"); 4773 return -1; 4774 } 4775 4776 if (adapter->init_done_rc) { 4777 release_crq_queue(adapter); 4778 return adapter->init_done_rc; 4779 } 4780 4781 if (adapter->from_passive_init) { 4782 adapter->state = VNIC_OPEN; 4783 adapter->from_passive_init = false; 4784 return -1; 4785 } 4786 4787 rc = init_sub_crqs(adapter); 4788 if (rc) { 4789 dev_err(dev, "Initialization of sub crqs failed\n"); 4790 release_crq_queue(adapter); 4791 return rc; 4792 } 4793 4794 rc = init_sub_crq_irqs(adapter); 4795 if (rc) { 4796 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4797 release_crq_queue(adapter); 4798 } 4799 4800 return rc; 4801 } 4802 4803 static struct device_attribute dev_attr_failover; 4804 4805 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4806 { 4807 struct ibmvnic_adapter *adapter; 4808 struct net_device *netdev; 4809 unsigned char *mac_addr_p; 4810 int rc; 4811 4812 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4813 dev->unit_address); 4814 4815 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4816 VETH_MAC_ADDR, NULL); 4817 if (!mac_addr_p) { 4818 dev_err(&dev->dev, 4819 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4820 __FILE__, __LINE__); 4821 return 0; 4822 } 4823 4824 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4825 IBMVNIC_MAX_QUEUES); 4826 if (!netdev) 4827 return -ENOMEM; 4828 4829 adapter = netdev_priv(netdev); 4830 adapter->state = VNIC_PROBING; 4831 dev_set_drvdata(&dev->dev, netdev); 4832 adapter->vdev = dev; 4833 adapter->netdev = netdev; 4834 4835 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4836 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4837 netdev->irq = dev->irq; 4838 netdev->netdev_ops = &ibmvnic_netdev_ops; 4839 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4840 SET_NETDEV_DEV(netdev, &dev->dev); 4841 4842 spin_lock_init(&adapter->stats_lock); 4843 4844 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4845 INIT_LIST_HEAD(&adapter->rwi_list); 4846 spin_lock_init(&adapter->rwi_lock); 4847 init_completion(&adapter->init_done); 4848 adapter->resetting = false; 4849 4850 do { 4851 rc = init_crq_queue(adapter); 4852 if (rc) { 4853 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 4854 rc); 4855 goto ibmvnic_init_fail; 4856 } 4857 4858 rc = ibmvnic_init(adapter); 4859 if (rc && rc != EAGAIN) 4860 goto ibmvnic_init_fail; 4861 } while (rc == EAGAIN); 4862 4863 rc = init_stats_buffers(adapter); 4864 if (rc) 4865 goto ibmvnic_init_fail; 4866 4867 rc = init_stats_token(adapter); 4868 if (rc) 4869 goto ibmvnic_stats_fail; 4870 4871 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4872 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4873 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4874 4875 rc = device_create_file(&dev->dev, &dev_attr_failover); 4876 if (rc) 4877 goto ibmvnic_dev_file_err; 4878 4879 netif_carrier_off(netdev); 4880 rc = register_netdev(netdev); 4881 if (rc) { 4882 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4883 goto ibmvnic_register_fail; 4884 } 4885 dev_info(&dev->dev, "ibmvnic registered\n"); 4886 4887 adapter->state = VNIC_PROBED; 4888 4889 adapter->wait_for_reset = false; 4890 4891 return 0; 4892 4893 ibmvnic_register_fail: 4894 device_remove_file(&dev->dev, &dev_attr_failover); 4895 4896 ibmvnic_dev_file_err: 4897 release_stats_token(adapter); 4898 4899 ibmvnic_stats_fail: 4900 release_stats_buffers(adapter); 4901 4902 ibmvnic_init_fail: 4903 release_sub_crqs(adapter, 1); 4904 release_crq_queue(adapter); 4905 free_netdev(netdev); 4906 4907 return rc; 4908 } 4909 4910 static int ibmvnic_remove(struct vio_dev *dev) 4911 { 4912 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4913 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4914 4915 adapter->state = VNIC_REMOVING; 4916 rtnl_lock(); 4917 unregister_netdevice(netdev); 4918 4919 release_resources(adapter); 4920 release_sub_crqs(adapter, 1); 4921 release_crq_queue(adapter); 4922 4923 release_stats_token(adapter); 4924 release_stats_buffers(adapter); 4925 4926 adapter->state = VNIC_REMOVED; 4927 4928 rtnl_unlock(); 4929 device_remove_file(&dev->dev, &dev_attr_failover); 4930 free_netdev(netdev); 4931 dev_set_drvdata(&dev->dev, NULL); 4932 4933 return 0; 4934 } 4935 4936 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4937 const char *buf, size_t count) 4938 { 4939 struct net_device *netdev = dev_get_drvdata(dev); 4940 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4941 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4942 __be64 session_token; 4943 long rc; 4944 4945 if (!sysfs_streq(buf, "1")) 4946 return -EINVAL; 4947 4948 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4949 H_GET_SESSION_TOKEN, 0, 0, 0); 4950 if (rc) { 4951 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4952 rc); 4953 return -EINVAL; 4954 } 4955 4956 session_token = (__be64)retbuf[0]; 4957 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4958 be64_to_cpu(session_token)); 4959 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4960 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4961 if (rc) { 4962 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4963 rc); 4964 return -EINVAL; 4965 } 4966 4967 return count; 4968 } 4969 4970 static DEVICE_ATTR_WO(failover); 4971 4972 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4973 { 4974 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4975 struct ibmvnic_adapter *adapter; 4976 struct iommu_table *tbl; 4977 unsigned long ret = 0; 4978 int i; 4979 4980 tbl = get_iommu_table_base(&vdev->dev); 4981 4982 /* netdev inits at probe time along with the structures we need below*/ 4983 if (!netdev) 4984 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4985 4986 adapter = netdev_priv(netdev); 4987 4988 ret += PAGE_SIZE; /* the crq message queue */ 4989 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4990 4991 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4992 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4993 4994 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4995 i++) 4996 ret += adapter->rx_pool[i].size * 4997 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4998 4999 return ret; 5000 } 5001 5002 static int ibmvnic_resume(struct device *dev) 5003 { 5004 struct net_device *netdev = dev_get_drvdata(dev); 5005 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5006 5007 if (adapter->state != VNIC_OPEN) 5008 return 0; 5009 5010 tasklet_schedule(&adapter->tasklet); 5011 5012 return 0; 5013 } 5014 5015 static const struct vio_device_id ibmvnic_device_table[] = { 5016 {"network", "IBM,vnic"}, 5017 {"", "" } 5018 }; 5019 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5020 5021 static const struct dev_pm_ops ibmvnic_pm_ops = { 5022 .resume = ibmvnic_resume 5023 }; 5024 5025 static struct vio_driver ibmvnic_driver = { 5026 .id_table = ibmvnic_device_table, 5027 .probe = ibmvnic_probe, 5028 .remove = ibmvnic_remove, 5029 .get_desired_dma = ibmvnic_get_desired_dma, 5030 .name = ibmvnic_driver_name, 5031 .pm = &ibmvnic_pm_ops, 5032 }; 5033 5034 /* module functions */ 5035 static int __init ibmvnic_module_init(void) 5036 { 5037 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5038 IBMVNIC_DRIVER_VERSION); 5039 5040 return vio_register_driver(&ibmvnic_driver); 5041 } 5042 5043 static void __exit ibmvnic_module_exit(void) 5044 { 5045 vio_unregister_driver(&ibmvnic_driver); 5046 } 5047 5048 module_init(ibmvnic_module_init); 5049 module_exit(ibmvnic_module_exit); 5050