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