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 (test_bit(0, &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 (test_bit(0, &adapter->resetting)) { 1432 if (!netif_subqueue_stopped(netdev, skb)) 1433 netif_stop_subqueue(netdev, queue_num); 1434 dev_kfree_skb_any(skb); 1435 1436 tx_send_failed++; 1437 tx_dropped++; 1438 ret = NETDEV_TX_OK; 1439 goto out; 1440 } 1441 1442 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1443 tx_dropped++; 1444 tx_send_failed++; 1445 ret = NETDEV_TX_OK; 1446 goto out; 1447 } 1448 if (skb_is_gso(skb)) 1449 tx_pool = &adapter->tso_pool[queue_num]; 1450 else 1451 tx_pool = &adapter->tx_pool[queue_num]; 1452 1453 tx_scrq = adapter->tx_scrq[queue_num]; 1454 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1455 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1456 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1457 1458 index = tx_pool->free_map[tx_pool->consumer_index]; 1459 1460 if (index == IBMVNIC_INVALID_MAP) { 1461 dev_kfree_skb_any(skb); 1462 tx_send_failed++; 1463 tx_dropped++; 1464 ret = NETDEV_TX_OK; 1465 goto out; 1466 } 1467 1468 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1469 1470 offset = index * tx_pool->buf_size; 1471 dst = tx_pool->long_term_buff.buff + offset; 1472 memset(dst, 0, tx_pool->buf_size); 1473 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1474 1475 if (skb_shinfo(skb)->nr_frags) { 1476 int cur, i; 1477 1478 /* Copy the head */ 1479 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1480 cur = skb_headlen(skb); 1481 1482 /* Copy the frags */ 1483 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1484 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1485 1486 memcpy(dst + cur, 1487 page_address(skb_frag_page(frag)) + 1488 skb_frag_off(frag), skb_frag_size(frag)); 1489 cur += skb_frag_size(frag); 1490 } 1491 } else { 1492 skb_copy_from_linear_data(skb, dst, skb->len); 1493 } 1494 1495 tx_pool->consumer_index = 1496 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1497 1498 tx_buff = &tx_pool->tx_buff[index]; 1499 tx_buff->skb = skb; 1500 tx_buff->data_dma[0] = data_dma_addr; 1501 tx_buff->data_len[0] = skb->len; 1502 tx_buff->index = index; 1503 tx_buff->pool_index = queue_num; 1504 tx_buff->last_frag = true; 1505 1506 memset(&tx_crq, 0, sizeof(tx_crq)); 1507 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1508 tx_crq.v1.type = IBMVNIC_TX_DESC; 1509 tx_crq.v1.n_crq_elem = 1; 1510 tx_crq.v1.n_sge = 1; 1511 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1512 1513 if (skb_is_gso(skb)) 1514 tx_crq.v1.correlator = 1515 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1516 else 1517 tx_crq.v1.correlator = cpu_to_be32(index); 1518 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1519 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1520 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1521 1522 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1523 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1524 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1525 } 1526 1527 if (skb->protocol == htons(ETH_P_IP)) { 1528 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1529 proto = ip_hdr(skb)->protocol; 1530 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1531 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1532 proto = ipv6_hdr(skb)->nexthdr; 1533 } 1534 1535 if (proto == IPPROTO_TCP) 1536 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1537 else if (proto == IPPROTO_UDP) 1538 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1539 1540 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1541 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1542 hdrs += 2; 1543 } 1544 if (skb_is_gso(skb)) { 1545 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1546 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1547 hdrs += 2; 1548 } 1549 /* determine if l2/3/4 headers are sent to firmware */ 1550 if ((*hdrs >> 7) & 1) { 1551 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1552 tx_crq.v1.n_crq_elem = num_entries; 1553 tx_buff->num_entries = num_entries; 1554 tx_buff->indir_arr[0] = tx_crq; 1555 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1556 sizeof(tx_buff->indir_arr), 1557 DMA_TO_DEVICE); 1558 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1559 dev_kfree_skb_any(skb); 1560 tx_buff->skb = NULL; 1561 if (!firmware_has_feature(FW_FEATURE_CMO)) 1562 dev_err(dev, "tx: unable to map descriptor array\n"); 1563 tx_map_failed++; 1564 tx_dropped++; 1565 ret = NETDEV_TX_OK; 1566 goto tx_err_out; 1567 } 1568 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1569 (u64)tx_buff->indir_dma, 1570 (u64)num_entries); 1571 dma_unmap_single(dev, tx_buff->indir_dma, 1572 sizeof(tx_buff->indir_arr), DMA_TO_DEVICE); 1573 } else { 1574 tx_buff->num_entries = num_entries; 1575 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1576 &tx_crq); 1577 } 1578 if (lpar_rc != H_SUCCESS) { 1579 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1580 dev_err_ratelimited(dev, "tx: send failed\n"); 1581 dev_kfree_skb_any(skb); 1582 tx_buff->skb = NULL; 1583 1584 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1585 /* Disable TX and report carrier off if queue is closed 1586 * or pending failover. 1587 * Firmware guarantees that a signal will be sent to the 1588 * driver, triggering a reset or some other action. 1589 */ 1590 netif_tx_stop_all_queues(netdev); 1591 netif_carrier_off(netdev); 1592 } 1593 1594 tx_send_failed++; 1595 tx_dropped++; 1596 ret = NETDEV_TX_OK; 1597 goto tx_err_out; 1598 } 1599 1600 if (atomic_add_return(num_entries, &tx_scrq->used) 1601 >= adapter->req_tx_entries_per_subcrq) { 1602 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1603 netif_stop_subqueue(netdev, queue_num); 1604 } 1605 1606 tx_packets++; 1607 tx_bytes += skb->len; 1608 txq->trans_start = jiffies; 1609 ret = NETDEV_TX_OK; 1610 goto out; 1611 1612 tx_err_out: 1613 /* roll back consumer index and map array*/ 1614 if (tx_pool->consumer_index == 0) 1615 tx_pool->consumer_index = 1616 tx_pool->num_buffers - 1; 1617 else 1618 tx_pool->consumer_index--; 1619 tx_pool->free_map[tx_pool->consumer_index] = index; 1620 out: 1621 netdev->stats.tx_dropped += tx_dropped; 1622 netdev->stats.tx_bytes += tx_bytes; 1623 netdev->stats.tx_packets += tx_packets; 1624 adapter->tx_send_failed += tx_send_failed; 1625 adapter->tx_map_failed += tx_map_failed; 1626 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1627 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1628 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1629 1630 return ret; 1631 } 1632 1633 static void ibmvnic_set_multi(struct net_device *netdev) 1634 { 1635 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1636 struct netdev_hw_addr *ha; 1637 union ibmvnic_crq crq; 1638 1639 memset(&crq, 0, sizeof(crq)); 1640 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1641 crq.request_capability.cmd = REQUEST_CAPABILITY; 1642 1643 if (netdev->flags & IFF_PROMISC) { 1644 if (!adapter->promisc_supported) 1645 return; 1646 } else { 1647 if (netdev->flags & IFF_ALLMULTI) { 1648 /* Accept all multicast */ 1649 memset(&crq, 0, sizeof(crq)); 1650 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1651 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1652 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1653 ibmvnic_send_crq(adapter, &crq); 1654 } else if (netdev_mc_empty(netdev)) { 1655 /* Reject all multicast */ 1656 memset(&crq, 0, sizeof(crq)); 1657 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1658 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1659 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1660 ibmvnic_send_crq(adapter, &crq); 1661 } else { 1662 /* Accept one or more multicast(s) */ 1663 netdev_for_each_mc_addr(ha, netdev) { 1664 memset(&crq, 0, sizeof(crq)); 1665 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1666 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1667 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1668 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1669 ha->addr); 1670 ibmvnic_send_crq(adapter, &crq); 1671 } 1672 } 1673 } 1674 } 1675 1676 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 1677 { 1678 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1679 union ibmvnic_crq crq; 1680 int rc; 1681 1682 if (!is_valid_ether_addr(dev_addr)) { 1683 rc = -EADDRNOTAVAIL; 1684 goto err; 1685 } 1686 1687 memset(&crq, 0, sizeof(crq)); 1688 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1689 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1690 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 1691 1692 init_completion(&adapter->fw_done); 1693 rc = ibmvnic_send_crq(adapter, &crq); 1694 if (rc) { 1695 rc = -EIO; 1696 goto err; 1697 } 1698 1699 wait_for_completion(&adapter->fw_done); 1700 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1701 if (adapter->fw_done_rc) { 1702 rc = -EIO; 1703 goto err; 1704 } 1705 1706 return 0; 1707 err: 1708 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 1709 return rc; 1710 } 1711 1712 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1713 { 1714 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1715 struct sockaddr *addr = p; 1716 int rc; 1717 1718 rc = 0; 1719 ether_addr_copy(adapter->mac_addr, addr->sa_data); 1720 if (adapter->state != VNIC_PROBED) 1721 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 1722 1723 return rc; 1724 } 1725 1726 /** 1727 * do_change_param_reset returns zero if we are able to keep processing reset 1728 * events, or non-zero if we hit a fatal error and must halt. 1729 */ 1730 static int do_change_param_reset(struct ibmvnic_adapter *adapter, 1731 struct ibmvnic_rwi *rwi, 1732 u32 reset_state) 1733 { 1734 struct net_device *netdev = adapter->netdev; 1735 int i, rc; 1736 1737 netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n", 1738 rwi->reset_reason); 1739 1740 netif_carrier_off(netdev); 1741 adapter->reset_reason = rwi->reset_reason; 1742 1743 ibmvnic_cleanup(netdev); 1744 1745 if (reset_state == VNIC_OPEN) { 1746 rc = __ibmvnic_close(netdev); 1747 if (rc) 1748 return rc; 1749 } 1750 1751 release_resources(adapter); 1752 release_sub_crqs(adapter, 1); 1753 release_crq_queue(adapter); 1754 1755 adapter->state = VNIC_PROBED; 1756 1757 rc = init_crq_queue(adapter); 1758 1759 if (rc) { 1760 netdev_err(adapter->netdev, 1761 "Couldn't initialize crq. rc=%d\n", rc); 1762 return rc; 1763 } 1764 1765 rc = ibmvnic_reset_init(adapter); 1766 if (rc) 1767 return IBMVNIC_INIT_FAILED; 1768 1769 /* If the adapter was in PROBE state prior to the reset, 1770 * exit here. 1771 */ 1772 if (reset_state == VNIC_PROBED) 1773 return 0; 1774 1775 rc = ibmvnic_login(netdev); 1776 if (rc) { 1777 adapter->state = reset_state; 1778 return rc; 1779 } 1780 1781 rc = init_resources(adapter); 1782 if (rc) 1783 return rc; 1784 1785 ibmvnic_disable_irqs(adapter); 1786 1787 adapter->state = VNIC_CLOSED; 1788 1789 if (reset_state == VNIC_CLOSED) 1790 return 0; 1791 1792 rc = __ibmvnic_open(netdev); 1793 if (rc) 1794 return IBMVNIC_OPEN_FAILED; 1795 1796 /* refresh device's multicast list */ 1797 ibmvnic_set_multi(netdev); 1798 1799 /* kick napi */ 1800 for (i = 0; i < adapter->req_rx_queues; i++) 1801 napi_schedule(&adapter->napi[i]); 1802 1803 return 0; 1804 } 1805 1806 /** 1807 * do_reset returns zero if we are able to keep processing reset events, or 1808 * non-zero if we hit a fatal error and must halt. 1809 */ 1810 static int do_reset(struct ibmvnic_adapter *adapter, 1811 struct ibmvnic_rwi *rwi, u32 reset_state) 1812 { 1813 u64 old_num_rx_queues, old_num_tx_queues; 1814 u64 old_num_rx_slots, old_num_tx_slots; 1815 struct net_device *netdev = adapter->netdev; 1816 int i, rc; 1817 1818 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1819 rwi->reset_reason); 1820 1821 rtnl_lock(); 1822 1823 netif_carrier_off(netdev); 1824 adapter->reset_reason = rwi->reset_reason; 1825 1826 old_num_rx_queues = adapter->req_rx_queues; 1827 old_num_tx_queues = adapter->req_tx_queues; 1828 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1829 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1830 1831 ibmvnic_cleanup(netdev); 1832 1833 if (reset_state == VNIC_OPEN && 1834 adapter->reset_reason != VNIC_RESET_MOBILITY && 1835 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1836 adapter->state = VNIC_CLOSING; 1837 1838 /* Release the RTNL lock before link state change and 1839 * re-acquire after the link state change to allow 1840 * linkwatch_event to grab the RTNL lock and run during 1841 * a reset. 1842 */ 1843 rtnl_unlock(); 1844 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1845 rtnl_lock(); 1846 if (rc) 1847 goto out; 1848 1849 if (adapter->state != VNIC_CLOSING) { 1850 rc = -1; 1851 goto out; 1852 } 1853 1854 adapter->state = VNIC_CLOSED; 1855 } 1856 1857 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1858 /* remove the closed state so when we call open it appears 1859 * we are coming from the probed state. 1860 */ 1861 adapter->state = VNIC_PROBED; 1862 1863 if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1864 rc = ibmvnic_reenable_crq_queue(adapter); 1865 release_sub_crqs(adapter, 1); 1866 } else { 1867 rc = ibmvnic_reset_crq(adapter); 1868 if (!rc) 1869 rc = vio_enable_interrupts(adapter->vdev); 1870 } 1871 1872 if (rc) { 1873 netdev_err(adapter->netdev, 1874 "Couldn't initialize crq. rc=%d\n", rc); 1875 goto out; 1876 } 1877 1878 rc = ibmvnic_reset_init(adapter); 1879 if (rc) { 1880 rc = IBMVNIC_INIT_FAILED; 1881 goto out; 1882 } 1883 1884 /* If the adapter was in PROBE state prior to the reset, 1885 * exit here. 1886 */ 1887 if (reset_state == VNIC_PROBED) { 1888 rc = 0; 1889 goto out; 1890 } 1891 1892 rc = ibmvnic_login(netdev); 1893 if (rc) { 1894 adapter->state = reset_state; 1895 goto out; 1896 } 1897 1898 if (adapter->req_rx_queues != old_num_rx_queues || 1899 adapter->req_tx_queues != old_num_tx_queues || 1900 adapter->req_rx_add_entries_per_subcrq != 1901 old_num_rx_slots || 1902 adapter->req_tx_entries_per_subcrq != 1903 old_num_tx_slots) { 1904 release_rx_pools(adapter); 1905 release_tx_pools(adapter); 1906 release_napi(adapter); 1907 release_vpd_data(adapter); 1908 1909 rc = init_resources(adapter); 1910 if (rc) 1911 goto out; 1912 1913 } else { 1914 rc = reset_tx_pools(adapter); 1915 if (rc) 1916 goto out; 1917 1918 rc = reset_rx_pools(adapter); 1919 if (rc) 1920 goto out; 1921 } 1922 ibmvnic_disable_irqs(adapter); 1923 } 1924 adapter->state = VNIC_CLOSED; 1925 1926 if (reset_state == VNIC_CLOSED) { 1927 rc = 0; 1928 goto out; 1929 } 1930 1931 rc = __ibmvnic_open(netdev); 1932 if (rc) { 1933 rc = IBMVNIC_OPEN_FAILED; 1934 goto out; 1935 } 1936 1937 /* refresh device's multicast list */ 1938 ibmvnic_set_multi(netdev); 1939 1940 /* kick napi */ 1941 for (i = 0; i < adapter->req_rx_queues; i++) 1942 napi_schedule(&adapter->napi[i]); 1943 1944 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 1945 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 1946 1947 rc = 0; 1948 1949 out: 1950 rtnl_unlock(); 1951 1952 return rc; 1953 } 1954 1955 static int do_hard_reset(struct ibmvnic_adapter *adapter, 1956 struct ibmvnic_rwi *rwi, u32 reset_state) 1957 { 1958 struct net_device *netdev = adapter->netdev; 1959 int rc; 1960 1961 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 1962 rwi->reset_reason); 1963 1964 netif_carrier_off(netdev); 1965 adapter->reset_reason = rwi->reset_reason; 1966 1967 ibmvnic_cleanup(netdev); 1968 release_resources(adapter); 1969 release_sub_crqs(adapter, 0); 1970 release_crq_queue(adapter); 1971 1972 /* remove the closed state so when we call open it appears 1973 * we are coming from the probed state. 1974 */ 1975 adapter->state = VNIC_PROBED; 1976 1977 reinit_completion(&adapter->init_done); 1978 rc = init_crq_queue(adapter); 1979 if (rc) { 1980 netdev_err(adapter->netdev, 1981 "Couldn't initialize crq. rc=%d\n", rc); 1982 return rc; 1983 } 1984 1985 rc = ibmvnic_init(adapter); 1986 if (rc) 1987 return rc; 1988 1989 /* If the adapter was in PROBE state prior to the reset, 1990 * exit here. 1991 */ 1992 if (reset_state == VNIC_PROBED) 1993 return 0; 1994 1995 rc = ibmvnic_login(netdev); 1996 if (rc) { 1997 adapter->state = VNIC_PROBED; 1998 return 0; 1999 } 2000 2001 rc = init_resources(adapter); 2002 if (rc) 2003 return rc; 2004 2005 ibmvnic_disable_irqs(adapter); 2006 adapter->state = VNIC_CLOSED; 2007 2008 if (reset_state == VNIC_CLOSED) 2009 return 0; 2010 2011 rc = __ibmvnic_open(netdev); 2012 if (rc) 2013 return IBMVNIC_OPEN_FAILED; 2014 2015 return 0; 2016 } 2017 2018 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 2019 { 2020 struct ibmvnic_rwi *rwi; 2021 unsigned long flags; 2022 2023 spin_lock_irqsave(&adapter->rwi_lock, flags); 2024 2025 if (!list_empty(&adapter->rwi_list)) { 2026 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 2027 list); 2028 list_del(&rwi->list); 2029 } else { 2030 rwi = NULL; 2031 } 2032 2033 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2034 return rwi; 2035 } 2036 2037 static void free_all_rwi(struct ibmvnic_adapter *adapter) 2038 { 2039 struct ibmvnic_rwi *rwi; 2040 2041 rwi = get_next_rwi(adapter); 2042 while (rwi) { 2043 kfree(rwi); 2044 rwi = get_next_rwi(adapter); 2045 } 2046 } 2047 2048 static void __ibmvnic_reset(struct work_struct *work) 2049 { 2050 struct ibmvnic_rwi *rwi; 2051 struct ibmvnic_adapter *adapter; 2052 u32 reset_state; 2053 int rc = 0; 2054 2055 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 2056 2057 if (test_and_set_bit_lock(0, &adapter->resetting)) { 2058 schedule_delayed_work(&adapter->ibmvnic_delayed_reset, 2059 IBMVNIC_RESET_DELAY); 2060 return; 2061 } 2062 2063 reset_state = adapter->state; 2064 2065 rwi = get_next_rwi(adapter); 2066 while (rwi) { 2067 if (adapter->state == VNIC_REMOVING || 2068 adapter->state == VNIC_REMOVED) { 2069 kfree(rwi); 2070 rc = EBUSY; 2071 break; 2072 } 2073 2074 if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2075 /* CHANGE_PARAM requestor holds rtnl_lock */ 2076 rc = do_change_param_reset(adapter, rwi, reset_state); 2077 } else if (adapter->force_reset_recovery) { 2078 /* Transport event occurred during previous reset */ 2079 if (adapter->wait_for_reset) { 2080 /* Previous was CHANGE_PARAM; caller locked */ 2081 adapter->force_reset_recovery = false; 2082 rc = do_hard_reset(adapter, rwi, reset_state); 2083 } else { 2084 rtnl_lock(); 2085 adapter->force_reset_recovery = false; 2086 rc = do_hard_reset(adapter, rwi, reset_state); 2087 rtnl_unlock(); 2088 } 2089 } else { 2090 rc = do_reset(adapter, rwi, reset_state); 2091 } 2092 kfree(rwi); 2093 if (rc == IBMVNIC_OPEN_FAILED) { 2094 if (list_empty(&adapter->rwi_list)) 2095 adapter->state = VNIC_CLOSED; 2096 else 2097 adapter->state = reset_state; 2098 rc = 0; 2099 } else if (rc && rc != IBMVNIC_INIT_FAILED && 2100 !adapter->force_reset_recovery) 2101 break; 2102 2103 rwi = get_next_rwi(adapter); 2104 2105 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 2106 rwi->reset_reason == VNIC_RESET_MOBILITY)) 2107 adapter->force_reset_recovery = true; 2108 } 2109 2110 if (adapter->wait_for_reset) { 2111 adapter->reset_done_rc = rc; 2112 complete(&adapter->reset_done); 2113 } 2114 2115 if (rc) { 2116 netdev_dbg(adapter->netdev, "Reset failed\n"); 2117 free_all_rwi(adapter); 2118 } 2119 2120 clear_bit_unlock(0, &adapter->resetting); 2121 } 2122 2123 static void __ibmvnic_delayed_reset(struct work_struct *work) 2124 { 2125 struct ibmvnic_adapter *adapter; 2126 2127 adapter = container_of(work, struct ibmvnic_adapter, 2128 ibmvnic_delayed_reset.work); 2129 __ibmvnic_reset(&adapter->ibmvnic_reset); 2130 } 2131 2132 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2133 enum ibmvnic_reset_reason reason) 2134 { 2135 struct list_head *entry, *tmp_entry; 2136 struct ibmvnic_rwi *rwi, *tmp; 2137 struct net_device *netdev = adapter->netdev; 2138 unsigned long flags; 2139 int ret; 2140 2141 if (adapter->state == VNIC_REMOVING || 2142 adapter->state == VNIC_REMOVED || 2143 adapter->failover_pending) { 2144 ret = EBUSY; 2145 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2146 goto err; 2147 } 2148 2149 if (adapter->state == VNIC_PROBING) { 2150 netdev_warn(netdev, "Adapter reset during probe\n"); 2151 ret = adapter->init_done_rc = EAGAIN; 2152 goto err; 2153 } 2154 2155 spin_lock_irqsave(&adapter->rwi_lock, flags); 2156 2157 list_for_each(entry, &adapter->rwi_list) { 2158 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2159 if (tmp->reset_reason == reason) { 2160 netdev_dbg(netdev, "Skipping matching reset\n"); 2161 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2162 ret = EBUSY; 2163 goto err; 2164 } 2165 } 2166 2167 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2168 if (!rwi) { 2169 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2170 ibmvnic_close(netdev); 2171 ret = ENOMEM; 2172 goto err; 2173 } 2174 /* if we just received a transport event, 2175 * flush reset queue and process this reset 2176 */ 2177 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2178 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2179 list_del(entry); 2180 } 2181 rwi->reset_reason = reason; 2182 list_add_tail(&rwi->list, &adapter->rwi_list); 2183 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2184 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2185 schedule_work(&adapter->ibmvnic_reset); 2186 2187 return 0; 2188 err: 2189 return -ret; 2190 } 2191 2192 static void ibmvnic_tx_timeout(struct net_device *dev) 2193 { 2194 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2195 2196 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2197 } 2198 2199 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2200 struct ibmvnic_rx_buff *rx_buff) 2201 { 2202 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2203 2204 rx_buff->skb = NULL; 2205 2206 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2207 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2208 2209 atomic_dec(&pool->available); 2210 } 2211 2212 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2213 { 2214 struct net_device *netdev = napi->dev; 2215 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2216 int scrq_num = (int)(napi - adapter->napi); 2217 int frames_processed = 0; 2218 2219 restart_poll: 2220 while (frames_processed < budget) { 2221 struct sk_buff *skb; 2222 struct ibmvnic_rx_buff *rx_buff; 2223 union sub_crq *next; 2224 u32 length; 2225 u16 offset; 2226 u8 flags = 0; 2227 2228 if (unlikely(test_bit(0, &adapter->resetting) && 2229 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2230 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2231 napi_complete_done(napi, frames_processed); 2232 return frames_processed; 2233 } 2234 2235 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2236 break; 2237 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2238 rx_buff = 2239 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2240 rx_comp.correlator); 2241 /* do error checking */ 2242 if (next->rx_comp.rc) { 2243 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2244 be16_to_cpu(next->rx_comp.rc)); 2245 /* free the entry */ 2246 next->rx_comp.first = 0; 2247 dev_kfree_skb_any(rx_buff->skb); 2248 remove_buff_from_pool(adapter, rx_buff); 2249 continue; 2250 } else if (!rx_buff->skb) { 2251 /* free the entry */ 2252 next->rx_comp.first = 0; 2253 remove_buff_from_pool(adapter, rx_buff); 2254 continue; 2255 } 2256 2257 length = be32_to_cpu(next->rx_comp.len); 2258 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2259 flags = next->rx_comp.flags; 2260 skb = rx_buff->skb; 2261 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2262 length); 2263 2264 /* VLAN Header has been stripped by the system firmware and 2265 * needs to be inserted by the driver 2266 */ 2267 if (adapter->rx_vlan_header_insertion && 2268 (flags & IBMVNIC_VLAN_STRIPPED)) 2269 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2270 ntohs(next->rx_comp.vlan_tci)); 2271 2272 /* free the entry */ 2273 next->rx_comp.first = 0; 2274 remove_buff_from_pool(adapter, rx_buff); 2275 2276 skb_put(skb, length); 2277 skb->protocol = eth_type_trans(skb, netdev); 2278 skb_record_rx_queue(skb, scrq_num); 2279 2280 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2281 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2282 skb->ip_summed = CHECKSUM_UNNECESSARY; 2283 } 2284 2285 length = skb->len; 2286 napi_gro_receive(napi, skb); /* send it up */ 2287 netdev->stats.rx_packets++; 2288 netdev->stats.rx_bytes += length; 2289 adapter->rx_stats_buffers[scrq_num].packets++; 2290 adapter->rx_stats_buffers[scrq_num].bytes += length; 2291 frames_processed++; 2292 } 2293 2294 if (adapter->state != VNIC_CLOSING) 2295 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2296 2297 if (frames_processed < budget) { 2298 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2299 napi_complete_done(napi, frames_processed); 2300 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2301 napi_reschedule(napi)) { 2302 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2303 goto restart_poll; 2304 } 2305 } 2306 return frames_processed; 2307 } 2308 2309 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2310 { 2311 int rc, ret; 2312 2313 adapter->fallback.mtu = adapter->req_mtu; 2314 adapter->fallback.rx_queues = adapter->req_rx_queues; 2315 adapter->fallback.tx_queues = adapter->req_tx_queues; 2316 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2317 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2318 2319 init_completion(&adapter->reset_done); 2320 adapter->wait_for_reset = true; 2321 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2322 if (rc) 2323 return rc; 2324 wait_for_completion(&adapter->reset_done); 2325 2326 ret = 0; 2327 if (adapter->reset_done_rc) { 2328 ret = -EIO; 2329 adapter->desired.mtu = adapter->fallback.mtu; 2330 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2331 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2332 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2333 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2334 2335 init_completion(&adapter->reset_done); 2336 adapter->wait_for_reset = true; 2337 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2338 if (rc) 2339 return ret; 2340 wait_for_completion(&adapter->reset_done); 2341 } 2342 adapter->wait_for_reset = false; 2343 2344 return ret; 2345 } 2346 2347 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2348 { 2349 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2350 2351 adapter->desired.mtu = new_mtu + ETH_HLEN; 2352 2353 return wait_for_reset(adapter); 2354 } 2355 2356 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2357 struct net_device *dev, 2358 netdev_features_t features) 2359 { 2360 /* Some backing hardware adapters can not 2361 * handle packets with a MSS less than 224 2362 * or with only one segment. 2363 */ 2364 if (skb_is_gso(skb)) { 2365 if (skb_shinfo(skb)->gso_size < 224 || 2366 skb_shinfo(skb)->gso_segs == 1) 2367 features &= ~NETIF_F_GSO_MASK; 2368 } 2369 2370 return features; 2371 } 2372 2373 static const struct net_device_ops ibmvnic_netdev_ops = { 2374 .ndo_open = ibmvnic_open, 2375 .ndo_stop = ibmvnic_close, 2376 .ndo_start_xmit = ibmvnic_xmit, 2377 .ndo_set_rx_mode = ibmvnic_set_multi, 2378 .ndo_set_mac_address = ibmvnic_set_mac, 2379 .ndo_validate_addr = eth_validate_addr, 2380 .ndo_tx_timeout = ibmvnic_tx_timeout, 2381 .ndo_change_mtu = ibmvnic_change_mtu, 2382 .ndo_features_check = ibmvnic_features_check, 2383 }; 2384 2385 /* ethtool functions */ 2386 2387 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2388 struct ethtool_link_ksettings *cmd) 2389 { 2390 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2391 int rc; 2392 2393 rc = send_query_phys_parms(adapter); 2394 if (rc) { 2395 adapter->speed = SPEED_UNKNOWN; 2396 adapter->duplex = DUPLEX_UNKNOWN; 2397 } 2398 cmd->base.speed = adapter->speed; 2399 cmd->base.duplex = adapter->duplex; 2400 cmd->base.port = PORT_FIBRE; 2401 cmd->base.phy_address = 0; 2402 cmd->base.autoneg = AUTONEG_ENABLE; 2403 2404 return 0; 2405 } 2406 2407 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2408 struct ethtool_drvinfo *info) 2409 { 2410 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2411 2412 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2413 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2414 strlcpy(info->fw_version, adapter->fw_version, 2415 sizeof(info->fw_version)); 2416 } 2417 2418 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2419 { 2420 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2421 2422 return adapter->msg_enable; 2423 } 2424 2425 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2426 { 2427 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2428 2429 adapter->msg_enable = data; 2430 } 2431 2432 static u32 ibmvnic_get_link(struct net_device *netdev) 2433 { 2434 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2435 2436 /* Don't need to send a query because we request a logical link up at 2437 * init and then we wait for link state indications 2438 */ 2439 return adapter->logical_link_state; 2440 } 2441 2442 static void ibmvnic_get_ringparam(struct net_device *netdev, 2443 struct ethtool_ringparam *ring) 2444 { 2445 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2446 2447 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2448 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2449 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2450 } else { 2451 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2452 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2453 } 2454 ring->rx_mini_max_pending = 0; 2455 ring->rx_jumbo_max_pending = 0; 2456 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2457 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2458 ring->rx_mini_pending = 0; 2459 ring->rx_jumbo_pending = 0; 2460 } 2461 2462 static int ibmvnic_set_ringparam(struct net_device *netdev, 2463 struct ethtool_ringparam *ring) 2464 { 2465 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2466 int ret; 2467 2468 ret = 0; 2469 adapter->desired.rx_entries = ring->rx_pending; 2470 adapter->desired.tx_entries = ring->tx_pending; 2471 2472 ret = wait_for_reset(adapter); 2473 2474 if (!ret && 2475 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2476 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2477 netdev_info(netdev, 2478 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2479 ring->rx_pending, ring->tx_pending, 2480 adapter->req_rx_add_entries_per_subcrq, 2481 adapter->req_tx_entries_per_subcrq); 2482 return ret; 2483 } 2484 2485 static void ibmvnic_get_channels(struct net_device *netdev, 2486 struct ethtool_channels *channels) 2487 { 2488 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2489 2490 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2491 channels->max_rx = adapter->max_rx_queues; 2492 channels->max_tx = adapter->max_tx_queues; 2493 } else { 2494 channels->max_rx = IBMVNIC_MAX_QUEUES; 2495 channels->max_tx = IBMVNIC_MAX_QUEUES; 2496 } 2497 2498 channels->max_other = 0; 2499 channels->max_combined = 0; 2500 channels->rx_count = adapter->req_rx_queues; 2501 channels->tx_count = adapter->req_tx_queues; 2502 channels->other_count = 0; 2503 channels->combined_count = 0; 2504 } 2505 2506 static int ibmvnic_set_channels(struct net_device *netdev, 2507 struct ethtool_channels *channels) 2508 { 2509 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2510 int ret; 2511 2512 ret = 0; 2513 adapter->desired.rx_queues = channels->rx_count; 2514 adapter->desired.tx_queues = channels->tx_count; 2515 2516 ret = wait_for_reset(adapter); 2517 2518 if (!ret && 2519 (adapter->req_rx_queues != channels->rx_count || 2520 adapter->req_tx_queues != channels->tx_count)) 2521 netdev_info(netdev, 2522 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2523 channels->rx_count, channels->tx_count, 2524 adapter->req_rx_queues, adapter->req_tx_queues); 2525 return ret; 2526 2527 } 2528 2529 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2530 { 2531 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2532 int i; 2533 2534 switch (stringset) { 2535 case ETH_SS_STATS: 2536 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2537 i++, data += ETH_GSTRING_LEN) 2538 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2539 2540 for (i = 0; i < adapter->req_tx_queues; i++) { 2541 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2542 data += ETH_GSTRING_LEN; 2543 2544 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2545 data += ETH_GSTRING_LEN; 2546 2547 snprintf(data, ETH_GSTRING_LEN, 2548 "tx%d_dropped_packets", i); 2549 data += ETH_GSTRING_LEN; 2550 } 2551 2552 for (i = 0; i < adapter->req_rx_queues; i++) { 2553 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2554 data += ETH_GSTRING_LEN; 2555 2556 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2557 data += ETH_GSTRING_LEN; 2558 2559 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2560 data += ETH_GSTRING_LEN; 2561 } 2562 break; 2563 2564 case ETH_SS_PRIV_FLAGS: 2565 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2566 strcpy(data + i * ETH_GSTRING_LEN, 2567 ibmvnic_priv_flags[i]); 2568 break; 2569 default: 2570 return; 2571 } 2572 } 2573 2574 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2575 { 2576 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2577 2578 switch (sset) { 2579 case ETH_SS_STATS: 2580 return ARRAY_SIZE(ibmvnic_stats) + 2581 adapter->req_tx_queues * NUM_TX_STATS + 2582 adapter->req_rx_queues * NUM_RX_STATS; 2583 case ETH_SS_PRIV_FLAGS: 2584 return ARRAY_SIZE(ibmvnic_priv_flags); 2585 default: 2586 return -EOPNOTSUPP; 2587 } 2588 } 2589 2590 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2591 struct ethtool_stats *stats, u64 *data) 2592 { 2593 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2594 union ibmvnic_crq crq; 2595 int i, j; 2596 int rc; 2597 2598 memset(&crq, 0, sizeof(crq)); 2599 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2600 crq.request_statistics.cmd = REQUEST_STATISTICS; 2601 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2602 crq.request_statistics.len = 2603 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2604 2605 /* Wait for data to be written */ 2606 init_completion(&adapter->stats_done); 2607 rc = ibmvnic_send_crq(adapter, &crq); 2608 if (rc) 2609 return; 2610 wait_for_completion(&adapter->stats_done); 2611 2612 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2613 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2614 ibmvnic_stats[i].offset)); 2615 2616 for (j = 0; j < adapter->req_tx_queues; j++) { 2617 data[i] = adapter->tx_stats_buffers[j].packets; 2618 i++; 2619 data[i] = adapter->tx_stats_buffers[j].bytes; 2620 i++; 2621 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2622 i++; 2623 } 2624 2625 for (j = 0; j < adapter->req_rx_queues; j++) { 2626 data[i] = adapter->rx_stats_buffers[j].packets; 2627 i++; 2628 data[i] = adapter->rx_stats_buffers[j].bytes; 2629 i++; 2630 data[i] = adapter->rx_stats_buffers[j].interrupts; 2631 i++; 2632 } 2633 } 2634 2635 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2636 { 2637 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2638 2639 return adapter->priv_flags; 2640 } 2641 2642 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2643 { 2644 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2645 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2646 2647 if (which_maxes) 2648 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2649 else 2650 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2651 2652 return 0; 2653 } 2654 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2655 .get_drvinfo = ibmvnic_get_drvinfo, 2656 .get_msglevel = ibmvnic_get_msglevel, 2657 .set_msglevel = ibmvnic_set_msglevel, 2658 .get_link = ibmvnic_get_link, 2659 .get_ringparam = ibmvnic_get_ringparam, 2660 .set_ringparam = ibmvnic_set_ringparam, 2661 .get_channels = ibmvnic_get_channels, 2662 .set_channels = ibmvnic_set_channels, 2663 .get_strings = ibmvnic_get_strings, 2664 .get_sset_count = ibmvnic_get_sset_count, 2665 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2666 .get_link_ksettings = ibmvnic_get_link_ksettings, 2667 .get_priv_flags = ibmvnic_get_priv_flags, 2668 .set_priv_flags = ibmvnic_set_priv_flags, 2669 }; 2670 2671 /* Routines for managing CRQs/sCRQs */ 2672 2673 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2674 struct ibmvnic_sub_crq_queue *scrq) 2675 { 2676 int rc; 2677 2678 if (scrq->irq) { 2679 free_irq(scrq->irq, scrq); 2680 irq_dispose_mapping(scrq->irq); 2681 scrq->irq = 0; 2682 } 2683 2684 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2685 atomic_set(&scrq->used, 0); 2686 scrq->cur = 0; 2687 2688 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2689 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2690 return rc; 2691 } 2692 2693 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2694 { 2695 int i, rc; 2696 2697 for (i = 0; i < adapter->req_tx_queues; i++) { 2698 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2699 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2700 if (rc) 2701 return rc; 2702 } 2703 2704 for (i = 0; i < adapter->req_rx_queues; i++) { 2705 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2706 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2707 if (rc) 2708 return rc; 2709 } 2710 2711 return rc; 2712 } 2713 2714 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2715 struct ibmvnic_sub_crq_queue *scrq, 2716 bool do_h_free) 2717 { 2718 struct device *dev = &adapter->vdev->dev; 2719 long rc; 2720 2721 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2722 2723 if (do_h_free) { 2724 /* Close the sub-crqs */ 2725 do { 2726 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2727 adapter->vdev->unit_address, 2728 scrq->crq_num); 2729 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2730 2731 if (rc) { 2732 netdev_err(adapter->netdev, 2733 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2734 scrq->crq_num, rc); 2735 } 2736 } 2737 2738 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2739 DMA_BIDIRECTIONAL); 2740 free_pages((unsigned long)scrq->msgs, 2); 2741 kfree(scrq); 2742 } 2743 2744 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2745 *adapter) 2746 { 2747 struct device *dev = &adapter->vdev->dev; 2748 struct ibmvnic_sub_crq_queue *scrq; 2749 int rc; 2750 2751 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2752 if (!scrq) 2753 return NULL; 2754 2755 scrq->msgs = 2756 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2757 if (!scrq->msgs) { 2758 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2759 goto zero_page_failed; 2760 } 2761 2762 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2763 DMA_BIDIRECTIONAL); 2764 if (dma_mapping_error(dev, scrq->msg_token)) { 2765 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2766 goto map_failed; 2767 } 2768 2769 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2770 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2771 2772 if (rc == H_RESOURCE) 2773 rc = ibmvnic_reset_crq(adapter); 2774 2775 if (rc == H_CLOSED) { 2776 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2777 } else if (rc) { 2778 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2779 goto reg_failed; 2780 } 2781 2782 scrq->adapter = adapter; 2783 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2784 spin_lock_init(&scrq->lock); 2785 2786 netdev_dbg(adapter->netdev, 2787 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2788 scrq->crq_num, scrq->hw_irq, scrq->irq); 2789 2790 return scrq; 2791 2792 reg_failed: 2793 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2794 DMA_BIDIRECTIONAL); 2795 map_failed: 2796 free_pages((unsigned long)scrq->msgs, 2); 2797 zero_page_failed: 2798 kfree(scrq); 2799 2800 return NULL; 2801 } 2802 2803 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2804 { 2805 int i; 2806 2807 if (adapter->tx_scrq) { 2808 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2809 if (!adapter->tx_scrq[i]) 2810 continue; 2811 2812 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2813 i); 2814 if (adapter->tx_scrq[i]->irq) { 2815 free_irq(adapter->tx_scrq[i]->irq, 2816 adapter->tx_scrq[i]); 2817 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2818 adapter->tx_scrq[i]->irq = 0; 2819 } 2820 2821 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2822 do_h_free); 2823 } 2824 2825 kfree(adapter->tx_scrq); 2826 adapter->tx_scrq = NULL; 2827 adapter->num_active_tx_scrqs = 0; 2828 } 2829 2830 if (adapter->rx_scrq) { 2831 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2832 if (!adapter->rx_scrq[i]) 2833 continue; 2834 2835 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2836 i); 2837 if (adapter->rx_scrq[i]->irq) { 2838 free_irq(adapter->rx_scrq[i]->irq, 2839 adapter->rx_scrq[i]); 2840 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2841 adapter->rx_scrq[i]->irq = 0; 2842 } 2843 2844 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2845 do_h_free); 2846 } 2847 2848 kfree(adapter->rx_scrq); 2849 adapter->rx_scrq = NULL; 2850 adapter->num_active_rx_scrqs = 0; 2851 } 2852 } 2853 2854 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2855 struct ibmvnic_sub_crq_queue *scrq) 2856 { 2857 struct device *dev = &adapter->vdev->dev; 2858 unsigned long rc; 2859 2860 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2861 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2862 if (rc) 2863 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2864 scrq->hw_irq, rc); 2865 return rc; 2866 } 2867 2868 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2869 struct ibmvnic_sub_crq_queue *scrq) 2870 { 2871 struct device *dev = &adapter->vdev->dev; 2872 unsigned long rc; 2873 2874 if (scrq->hw_irq > 0x100000000ULL) { 2875 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2876 return 1; 2877 } 2878 2879 if (test_bit(0, &adapter->resetting) && 2880 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2881 struct irq_desc *desc = irq_to_desc(scrq->irq); 2882 struct irq_chip *chip = irq_desc_get_chip(desc); 2883 2884 chip->irq_eoi(&desc->irq_data); 2885 } 2886 2887 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2888 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2889 if (rc) 2890 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2891 scrq->hw_irq, rc); 2892 return rc; 2893 } 2894 2895 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2896 struct ibmvnic_sub_crq_queue *scrq) 2897 { 2898 struct device *dev = &adapter->vdev->dev; 2899 struct ibmvnic_tx_pool *tx_pool; 2900 struct ibmvnic_tx_buff *txbuff; 2901 union sub_crq *next; 2902 int index; 2903 int i, j; 2904 2905 restart_loop: 2906 while (pending_scrq(adapter, scrq)) { 2907 unsigned int pool = scrq->pool_index; 2908 int num_entries = 0; 2909 2910 next = ibmvnic_next_scrq(adapter, scrq); 2911 for (i = 0; i < next->tx_comp.num_comps; i++) { 2912 if (next->tx_comp.rcs[i]) { 2913 dev_err(dev, "tx error %x\n", 2914 next->tx_comp.rcs[i]); 2915 continue; 2916 } 2917 index = be32_to_cpu(next->tx_comp.correlators[i]); 2918 if (index & IBMVNIC_TSO_POOL_MASK) { 2919 tx_pool = &adapter->tso_pool[pool]; 2920 index &= ~IBMVNIC_TSO_POOL_MASK; 2921 } else { 2922 tx_pool = &adapter->tx_pool[pool]; 2923 } 2924 2925 txbuff = &tx_pool->tx_buff[index]; 2926 2927 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2928 if (!txbuff->data_dma[j]) 2929 continue; 2930 2931 txbuff->data_dma[j] = 0; 2932 } 2933 2934 if (txbuff->last_frag) { 2935 dev_kfree_skb_any(txbuff->skb); 2936 txbuff->skb = NULL; 2937 } 2938 2939 num_entries += txbuff->num_entries; 2940 2941 tx_pool->free_map[tx_pool->producer_index] = index; 2942 tx_pool->producer_index = 2943 (tx_pool->producer_index + 1) % 2944 tx_pool->num_buffers; 2945 } 2946 /* remove tx_comp scrq*/ 2947 next->tx_comp.first = 0; 2948 2949 if (atomic_sub_return(num_entries, &scrq->used) <= 2950 (adapter->req_tx_entries_per_subcrq / 2) && 2951 __netif_subqueue_stopped(adapter->netdev, 2952 scrq->pool_index)) { 2953 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2954 netdev_dbg(adapter->netdev, "Started queue %d\n", 2955 scrq->pool_index); 2956 } 2957 } 2958 2959 enable_scrq_irq(adapter, scrq); 2960 2961 if (pending_scrq(adapter, scrq)) { 2962 disable_scrq_irq(adapter, scrq); 2963 goto restart_loop; 2964 } 2965 2966 return 0; 2967 } 2968 2969 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2970 { 2971 struct ibmvnic_sub_crq_queue *scrq = instance; 2972 struct ibmvnic_adapter *adapter = scrq->adapter; 2973 2974 disable_scrq_irq(adapter, scrq); 2975 ibmvnic_complete_tx(adapter, scrq); 2976 2977 return IRQ_HANDLED; 2978 } 2979 2980 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2981 { 2982 struct ibmvnic_sub_crq_queue *scrq = instance; 2983 struct ibmvnic_adapter *adapter = scrq->adapter; 2984 2985 /* When booting a kdump kernel we can hit pending interrupts 2986 * prior to completing driver initialization. 2987 */ 2988 if (unlikely(adapter->state != VNIC_OPEN)) 2989 return IRQ_NONE; 2990 2991 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2992 2993 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2994 disable_scrq_irq(adapter, scrq); 2995 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2996 } 2997 2998 return IRQ_HANDLED; 2999 } 3000 3001 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 3002 { 3003 struct device *dev = &adapter->vdev->dev; 3004 struct ibmvnic_sub_crq_queue *scrq; 3005 int i = 0, j = 0; 3006 int rc = 0; 3007 3008 for (i = 0; i < adapter->req_tx_queues; i++) { 3009 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 3010 i); 3011 scrq = adapter->tx_scrq[i]; 3012 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3013 3014 if (!scrq->irq) { 3015 rc = -EINVAL; 3016 dev_err(dev, "Error mapping irq\n"); 3017 goto req_tx_irq_failed; 3018 } 3019 3020 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 3021 adapter->vdev->unit_address, i); 3022 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 3023 0, scrq->name, scrq); 3024 3025 if (rc) { 3026 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 3027 scrq->irq, rc); 3028 irq_dispose_mapping(scrq->irq); 3029 goto req_tx_irq_failed; 3030 } 3031 } 3032 3033 for (i = 0; i < adapter->req_rx_queues; i++) { 3034 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 3035 i); 3036 scrq = adapter->rx_scrq[i]; 3037 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 3038 if (!scrq->irq) { 3039 rc = -EINVAL; 3040 dev_err(dev, "Error mapping irq\n"); 3041 goto req_rx_irq_failed; 3042 } 3043 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 3044 adapter->vdev->unit_address, i); 3045 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 3046 0, scrq->name, scrq); 3047 if (rc) { 3048 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 3049 scrq->irq, rc); 3050 irq_dispose_mapping(scrq->irq); 3051 goto req_rx_irq_failed; 3052 } 3053 } 3054 return rc; 3055 3056 req_rx_irq_failed: 3057 for (j = 0; j < i; j++) { 3058 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 3059 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3060 } 3061 i = adapter->req_tx_queues; 3062 req_tx_irq_failed: 3063 for (j = 0; j < i; j++) { 3064 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 3065 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 3066 } 3067 release_sub_crqs(adapter, 1); 3068 return rc; 3069 } 3070 3071 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 3072 { 3073 struct device *dev = &adapter->vdev->dev; 3074 struct ibmvnic_sub_crq_queue **allqueues; 3075 int registered_queues = 0; 3076 int total_queues; 3077 int more = 0; 3078 int i; 3079 3080 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 3081 3082 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 3083 if (!allqueues) 3084 return -1; 3085 3086 for (i = 0; i < total_queues; i++) { 3087 allqueues[i] = init_sub_crq_queue(adapter); 3088 if (!allqueues[i]) { 3089 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 3090 break; 3091 } 3092 registered_queues++; 3093 } 3094 3095 /* Make sure we were able to register the minimum number of queues */ 3096 if (registered_queues < 3097 adapter->min_tx_queues + adapter->min_rx_queues) { 3098 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3099 goto tx_failed; 3100 } 3101 3102 /* Distribute the failed allocated queues*/ 3103 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3104 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3105 switch (i % 3) { 3106 case 0: 3107 if (adapter->req_rx_queues > adapter->min_rx_queues) 3108 adapter->req_rx_queues--; 3109 else 3110 more++; 3111 break; 3112 case 1: 3113 if (adapter->req_tx_queues > adapter->min_tx_queues) 3114 adapter->req_tx_queues--; 3115 else 3116 more++; 3117 break; 3118 } 3119 } 3120 3121 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3122 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3123 if (!adapter->tx_scrq) 3124 goto tx_failed; 3125 3126 for (i = 0; i < adapter->req_tx_queues; i++) { 3127 adapter->tx_scrq[i] = allqueues[i]; 3128 adapter->tx_scrq[i]->pool_index = i; 3129 adapter->num_active_tx_scrqs++; 3130 } 3131 3132 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3133 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3134 if (!adapter->rx_scrq) 3135 goto rx_failed; 3136 3137 for (i = 0; i < adapter->req_rx_queues; i++) { 3138 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3139 adapter->rx_scrq[i]->scrq_num = i; 3140 adapter->num_active_rx_scrqs++; 3141 } 3142 3143 kfree(allqueues); 3144 return 0; 3145 3146 rx_failed: 3147 kfree(adapter->tx_scrq); 3148 adapter->tx_scrq = NULL; 3149 tx_failed: 3150 for (i = 0; i < registered_queues; i++) 3151 release_sub_crq_queue(adapter, allqueues[i], 1); 3152 kfree(allqueues); 3153 return -1; 3154 } 3155 3156 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3157 { 3158 struct device *dev = &adapter->vdev->dev; 3159 union ibmvnic_crq crq; 3160 int max_entries; 3161 3162 if (!retry) { 3163 /* Sub-CRQ entries are 32 byte long */ 3164 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3165 3166 if (adapter->min_tx_entries_per_subcrq > entries_page || 3167 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3168 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3169 return; 3170 } 3171 3172 if (adapter->desired.mtu) 3173 adapter->req_mtu = adapter->desired.mtu; 3174 else 3175 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3176 3177 if (!adapter->desired.tx_entries) 3178 adapter->desired.tx_entries = 3179 adapter->max_tx_entries_per_subcrq; 3180 if (!adapter->desired.rx_entries) 3181 adapter->desired.rx_entries = 3182 adapter->max_rx_add_entries_per_subcrq; 3183 3184 max_entries = IBMVNIC_MAX_LTB_SIZE / 3185 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3186 3187 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3188 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3189 adapter->desired.tx_entries = max_entries; 3190 } 3191 3192 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3193 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3194 adapter->desired.rx_entries = max_entries; 3195 } 3196 3197 if (adapter->desired.tx_entries) 3198 adapter->req_tx_entries_per_subcrq = 3199 adapter->desired.tx_entries; 3200 else 3201 adapter->req_tx_entries_per_subcrq = 3202 adapter->max_tx_entries_per_subcrq; 3203 3204 if (adapter->desired.rx_entries) 3205 adapter->req_rx_add_entries_per_subcrq = 3206 adapter->desired.rx_entries; 3207 else 3208 adapter->req_rx_add_entries_per_subcrq = 3209 adapter->max_rx_add_entries_per_subcrq; 3210 3211 if (adapter->desired.tx_queues) 3212 adapter->req_tx_queues = 3213 adapter->desired.tx_queues; 3214 else 3215 adapter->req_tx_queues = 3216 adapter->opt_tx_comp_sub_queues; 3217 3218 if (adapter->desired.rx_queues) 3219 adapter->req_rx_queues = 3220 adapter->desired.rx_queues; 3221 else 3222 adapter->req_rx_queues = 3223 adapter->opt_rx_comp_queues; 3224 3225 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3226 } 3227 3228 memset(&crq, 0, sizeof(crq)); 3229 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3230 crq.request_capability.cmd = REQUEST_CAPABILITY; 3231 3232 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3233 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3234 atomic_inc(&adapter->running_cap_crqs); 3235 ibmvnic_send_crq(adapter, &crq); 3236 3237 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3238 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3239 atomic_inc(&adapter->running_cap_crqs); 3240 ibmvnic_send_crq(adapter, &crq); 3241 3242 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3243 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3244 atomic_inc(&adapter->running_cap_crqs); 3245 ibmvnic_send_crq(adapter, &crq); 3246 3247 crq.request_capability.capability = 3248 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3249 crq.request_capability.number = 3250 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3251 atomic_inc(&adapter->running_cap_crqs); 3252 ibmvnic_send_crq(adapter, &crq); 3253 3254 crq.request_capability.capability = 3255 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3256 crq.request_capability.number = 3257 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3258 atomic_inc(&adapter->running_cap_crqs); 3259 ibmvnic_send_crq(adapter, &crq); 3260 3261 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3262 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3263 atomic_inc(&adapter->running_cap_crqs); 3264 ibmvnic_send_crq(adapter, &crq); 3265 3266 if (adapter->netdev->flags & IFF_PROMISC) { 3267 if (adapter->promisc_supported) { 3268 crq.request_capability.capability = 3269 cpu_to_be16(PROMISC_REQUESTED); 3270 crq.request_capability.number = cpu_to_be64(1); 3271 atomic_inc(&adapter->running_cap_crqs); 3272 ibmvnic_send_crq(adapter, &crq); 3273 } 3274 } else { 3275 crq.request_capability.capability = 3276 cpu_to_be16(PROMISC_REQUESTED); 3277 crq.request_capability.number = cpu_to_be64(0); 3278 atomic_inc(&adapter->running_cap_crqs); 3279 ibmvnic_send_crq(adapter, &crq); 3280 } 3281 } 3282 3283 static int pending_scrq(struct ibmvnic_adapter *adapter, 3284 struct ibmvnic_sub_crq_queue *scrq) 3285 { 3286 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3287 3288 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3289 return 1; 3290 else 3291 return 0; 3292 } 3293 3294 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3295 struct ibmvnic_sub_crq_queue *scrq) 3296 { 3297 union sub_crq *entry; 3298 unsigned long flags; 3299 3300 spin_lock_irqsave(&scrq->lock, flags); 3301 entry = &scrq->msgs[scrq->cur]; 3302 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3303 if (++scrq->cur == scrq->size) 3304 scrq->cur = 0; 3305 } else { 3306 entry = NULL; 3307 } 3308 spin_unlock_irqrestore(&scrq->lock, flags); 3309 3310 return entry; 3311 } 3312 3313 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3314 { 3315 struct ibmvnic_crq_queue *queue = &adapter->crq; 3316 union ibmvnic_crq *crq; 3317 3318 crq = &queue->msgs[queue->cur]; 3319 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3320 if (++queue->cur == queue->size) 3321 queue->cur = 0; 3322 } else { 3323 crq = NULL; 3324 } 3325 3326 return crq; 3327 } 3328 3329 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3330 { 3331 switch (rc) { 3332 case H_PARAMETER: 3333 dev_warn_ratelimited(dev, 3334 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3335 func, rc); 3336 break; 3337 case H_CLOSED: 3338 dev_warn_ratelimited(dev, 3339 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3340 func, rc); 3341 break; 3342 default: 3343 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3344 break; 3345 } 3346 } 3347 3348 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3349 union sub_crq *sub_crq) 3350 { 3351 unsigned int ua = adapter->vdev->unit_address; 3352 struct device *dev = &adapter->vdev->dev; 3353 u64 *u64_crq = (u64 *)sub_crq; 3354 int rc; 3355 3356 netdev_dbg(adapter->netdev, 3357 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3358 (unsigned long int)cpu_to_be64(remote_handle), 3359 (unsigned long int)cpu_to_be64(u64_crq[0]), 3360 (unsigned long int)cpu_to_be64(u64_crq[1]), 3361 (unsigned long int)cpu_to_be64(u64_crq[2]), 3362 (unsigned long int)cpu_to_be64(u64_crq[3])); 3363 3364 /* Make sure the hypervisor sees the complete request */ 3365 mb(); 3366 3367 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3368 cpu_to_be64(remote_handle), 3369 cpu_to_be64(u64_crq[0]), 3370 cpu_to_be64(u64_crq[1]), 3371 cpu_to_be64(u64_crq[2]), 3372 cpu_to_be64(u64_crq[3])); 3373 3374 if (rc) 3375 print_subcrq_error(dev, rc, __func__); 3376 3377 return rc; 3378 } 3379 3380 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3381 u64 remote_handle, u64 ioba, u64 num_entries) 3382 { 3383 unsigned int ua = adapter->vdev->unit_address; 3384 struct device *dev = &adapter->vdev->dev; 3385 int rc; 3386 3387 /* Make sure the hypervisor sees the complete request */ 3388 mb(); 3389 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3390 cpu_to_be64(remote_handle), 3391 ioba, num_entries); 3392 3393 if (rc) 3394 print_subcrq_error(dev, rc, __func__); 3395 3396 return rc; 3397 } 3398 3399 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3400 union ibmvnic_crq *crq) 3401 { 3402 unsigned int ua = adapter->vdev->unit_address; 3403 struct device *dev = &adapter->vdev->dev; 3404 u64 *u64_crq = (u64 *)crq; 3405 int rc; 3406 3407 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3408 (unsigned long int)cpu_to_be64(u64_crq[0]), 3409 (unsigned long int)cpu_to_be64(u64_crq[1])); 3410 3411 if (!adapter->crq.active && 3412 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3413 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3414 return -EINVAL; 3415 } 3416 3417 /* Make sure the hypervisor sees the complete request */ 3418 mb(); 3419 3420 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3421 cpu_to_be64(u64_crq[0]), 3422 cpu_to_be64(u64_crq[1])); 3423 3424 if (rc) { 3425 if (rc == H_CLOSED) { 3426 dev_warn(dev, "CRQ Queue closed\n"); 3427 if (test_bit(0, &adapter->resetting)) 3428 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3429 } 3430 3431 dev_warn(dev, "Send error (rc=%d)\n", rc); 3432 } 3433 3434 return rc; 3435 } 3436 3437 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3438 { 3439 union ibmvnic_crq crq; 3440 3441 memset(&crq, 0, sizeof(crq)); 3442 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3443 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3444 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3445 3446 return ibmvnic_send_crq(adapter, &crq); 3447 } 3448 3449 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3450 { 3451 union ibmvnic_crq crq; 3452 3453 memset(&crq, 0, sizeof(crq)); 3454 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3455 crq.version_exchange.cmd = VERSION_EXCHANGE; 3456 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3457 3458 return ibmvnic_send_crq(adapter, &crq); 3459 } 3460 3461 struct vnic_login_client_data { 3462 u8 type; 3463 __be16 len; 3464 char name[]; 3465 } __packed; 3466 3467 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3468 { 3469 int len; 3470 3471 /* Calculate the amount of buffer space needed for the 3472 * vnic client data in the login buffer. There are four entries, 3473 * OS name, LPAR name, device name, and a null last entry. 3474 */ 3475 len = 4 * sizeof(struct vnic_login_client_data); 3476 len += 6; /* "Linux" plus NULL */ 3477 len += strlen(utsname()->nodename) + 1; 3478 len += strlen(adapter->netdev->name) + 1; 3479 3480 return len; 3481 } 3482 3483 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3484 struct vnic_login_client_data *vlcd) 3485 { 3486 const char *os_name = "Linux"; 3487 int len; 3488 3489 /* Type 1 - LPAR OS */ 3490 vlcd->type = 1; 3491 len = strlen(os_name) + 1; 3492 vlcd->len = cpu_to_be16(len); 3493 strncpy(vlcd->name, os_name, len); 3494 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3495 3496 /* Type 2 - LPAR name */ 3497 vlcd->type = 2; 3498 len = strlen(utsname()->nodename) + 1; 3499 vlcd->len = cpu_to_be16(len); 3500 strncpy(vlcd->name, utsname()->nodename, len); 3501 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3502 3503 /* Type 3 - device name */ 3504 vlcd->type = 3; 3505 len = strlen(adapter->netdev->name) + 1; 3506 vlcd->len = cpu_to_be16(len); 3507 strncpy(vlcd->name, adapter->netdev->name, len); 3508 } 3509 3510 static int send_login(struct ibmvnic_adapter *adapter) 3511 { 3512 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3513 struct ibmvnic_login_buffer *login_buffer; 3514 struct device *dev = &adapter->vdev->dev; 3515 dma_addr_t rsp_buffer_token; 3516 dma_addr_t buffer_token; 3517 size_t rsp_buffer_size; 3518 union ibmvnic_crq crq; 3519 size_t buffer_size; 3520 __be64 *tx_list_p; 3521 __be64 *rx_list_p; 3522 int client_data_len; 3523 struct vnic_login_client_data *vlcd; 3524 int i; 3525 3526 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3527 netdev_err(adapter->netdev, 3528 "RX or TX queues are not allocated, device login failed\n"); 3529 return -1; 3530 } 3531 3532 release_login_rsp_buffer(adapter); 3533 client_data_len = vnic_client_data_len(adapter); 3534 3535 buffer_size = 3536 sizeof(struct ibmvnic_login_buffer) + 3537 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3538 client_data_len; 3539 3540 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3541 if (!login_buffer) 3542 goto buf_alloc_failed; 3543 3544 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3545 DMA_TO_DEVICE); 3546 if (dma_mapping_error(dev, buffer_token)) { 3547 dev_err(dev, "Couldn't map login buffer\n"); 3548 goto buf_map_failed; 3549 } 3550 3551 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3552 sizeof(u64) * adapter->req_tx_queues + 3553 sizeof(u64) * adapter->req_rx_queues + 3554 sizeof(u64) * adapter->req_rx_queues + 3555 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3556 3557 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3558 if (!login_rsp_buffer) 3559 goto buf_rsp_alloc_failed; 3560 3561 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3562 rsp_buffer_size, DMA_FROM_DEVICE); 3563 if (dma_mapping_error(dev, rsp_buffer_token)) { 3564 dev_err(dev, "Couldn't map login rsp buffer\n"); 3565 goto buf_rsp_map_failed; 3566 } 3567 3568 adapter->login_buf = login_buffer; 3569 adapter->login_buf_token = buffer_token; 3570 adapter->login_buf_sz = buffer_size; 3571 adapter->login_rsp_buf = login_rsp_buffer; 3572 adapter->login_rsp_buf_token = rsp_buffer_token; 3573 adapter->login_rsp_buf_sz = rsp_buffer_size; 3574 3575 login_buffer->len = cpu_to_be32(buffer_size); 3576 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3577 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3578 login_buffer->off_txcomp_subcrqs = 3579 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3580 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3581 login_buffer->off_rxcomp_subcrqs = 3582 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3583 sizeof(u64) * adapter->req_tx_queues); 3584 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3585 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3586 3587 tx_list_p = (__be64 *)((char *)login_buffer + 3588 sizeof(struct ibmvnic_login_buffer)); 3589 rx_list_p = (__be64 *)((char *)login_buffer + 3590 sizeof(struct ibmvnic_login_buffer) + 3591 sizeof(u64) * adapter->req_tx_queues); 3592 3593 for (i = 0; i < adapter->req_tx_queues; i++) { 3594 if (adapter->tx_scrq[i]) { 3595 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3596 crq_num); 3597 } 3598 } 3599 3600 for (i = 0; i < adapter->req_rx_queues; i++) { 3601 if (adapter->rx_scrq[i]) { 3602 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3603 crq_num); 3604 } 3605 } 3606 3607 /* Insert vNIC login client data */ 3608 vlcd = (struct vnic_login_client_data *) 3609 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3610 login_buffer->client_data_offset = 3611 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3612 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3613 3614 vnic_add_client_data(adapter, vlcd); 3615 3616 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3617 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3618 netdev_dbg(adapter->netdev, "%016lx\n", 3619 ((unsigned long int *)(adapter->login_buf))[i]); 3620 } 3621 3622 memset(&crq, 0, sizeof(crq)); 3623 crq.login.first = IBMVNIC_CRQ_CMD; 3624 crq.login.cmd = LOGIN; 3625 crq.login.ioba = cpu_to_be32(buffer_token); 3626 crq.login.len = cpu_to_be32(buffer_size); 3627 ibmvnic_send_crq(adapter, &crq); 3628 3629 return 0; 3630 3631 buf_rsp_map_failed: 3632 kfree(login_rsp_buffer); 3633 buf_rsp_alloc_failed: 3634 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3635 buf_map_failed: 3636 kfree(login_buffer); 3637 buf_alloc_failed: 3638 return -1; 3639 } 3640 3641 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3642 u32 len, u8 map_id) 3643 { 3644 union ibmvnic_crq crq; 3645 3646 memset(&crq, 0, sizeof(crq)); 3647 crq.request_map.first = IBMVNIC_CRQ_CMD; 3648 crq.request_map.cmd = REQUEST_MAP; 3649 crq.request_map.map_id = map_id; 3650 crq.request_map.ioba = cpu_to_be32(addr); 3651 crq.request_map.len = cpu_to_be32(len); 3652 return ibmvnic_send_crq(adapter, &crq); 3653 } 3654 3655 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3656 { 3657 union ibmvnic_crq crq; 3658 3659 memset(&crq, 0, sizeof(crq)); 3660 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3661 crq.request_unmap.cmd = REQUEST_UNMAP; 3662 crq.request_unmap.map_id = map_id; 3663 return ibmvnic_send_crq(adapter, &crq); 3664 } 3665 3666 static void send_map_query(struct ibmvnic_adapter *adapter) 3667 { 3668 union ibmvnic_crq crq; 3669 3670 memset(&crq, 0, sizeof(crq)); 3671 crq.query_map.first = IBMVNIC_CRQ_CMD; 3672 crq.query_map.cmd = QUERY_MAP; 3673 ibmvnic_send_crq(adapter, &crq); 3674 } 3675 3676 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3677 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3678 { 3679 union ibmvnic_crq crq; 3680 3681 atomic_set(&adapter->running_cap_crqs, 0); 3682 memset(&crq, 0, sizeof(crq)); 3683 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3684 crq.query_capability.cmd = QUERY_CAPABILITY; 3685 3686 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3687 atomic_inc(&adapter->running_cap_crqs); 3688 ibmvnic_send_crq(adapter, &crq); 3689 3690 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3691 atomic_inc(&adapter->running_cap_crqs); 3692 ibmvnic_send_crq(adapter, &crq); 3693 3694 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3695 atomic_inc(&adapter->running_cap_crqs); 3696 ibmvnic_send_crq(adapter, &crq); 3697 3698 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3699 atomic_inc(&adapter->running_cap_crqs); 3700 ibmvnic_send_crq(adapter, &crq); 3701 3702 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3703 atomic_inc(&adapter->running_cap_crqs); 3704 ibmvnic_send_crq(adapter, &crq); 3705 3706 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3707 atomic_inc(&adapter->running_cap_crqs); 3708 ibmvnic_send_crq(adapter, &crq); 3709 3710 crq.query_capability.capability = 3711 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3712 atomic_inc(&adapter->running_cap_crqs); 3713 ibmvnic_send_crq(adapter, &crq); 3714 3715 crq.query_capability.capability = 3716 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3717 atomic_inc(&adapter->running_cap_crqs); 3718 ibmvnic_send_crq(adapter, &crq); 3719 3720 crq.query_capability.capability = 3721 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3722 atomic_inc(&adapter->running_cap_crqs); 3723 ibmvnic_send_crq(adapter, &crq); 3724 3725 crq.query_capability.capability = 3726 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3727 atomic_inc(&adapter->running_cap_crqs); 3728 ibmvnic_send_crq(adapter, &crq); 3729 3730 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3731 atomic_inc(&adapter->running_cap_crqs); 3732 ibmvnic_send_crq(adapter, &crq); 3733 3734 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3735 atomic_inc(&adapter->running_cap_crqs); 3736 ibmvnic_send_crq(adapter, &crq); 3737 3738 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3739 atomic_inc(&adapter->running_cap_crqs); 3740 ibmvnic_send_crq(adapter, &crq); 3741 3742 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3743 atomic_inc(&adapter->running_cap_crqs); 3744 ibmvnic_send_crq(adapter, &crq); 3745 3746 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3747 atomic_inc(&adapter->running_cap_crqs); 3748 ibmvnic_send_crq(adapter, &crq); 3749 3750 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3751 atomic_inc(&adapter->running_cap_crqs); 3752 ibmvnic_send_crq(adapter, &crq); 3753 3754 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3755 atomic_inc(&adapter->running_cap_crqs); 3756 ibmvnic_send_crq(adapter, &crq); 3757 3758 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3759 atomic_inc(&adapter->running_cap_crqs); 3760 ibmvnic_send_crq(adapter, &crq); 3761 3762 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3763 atomic_inc(&adapter->running_cap_crqs); 3764 ibmvnic_send_crq(adapter, &crq); 3765 3766 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3767 atomic_inc(&adapter->running_cap_crqs); 3768 ibmvnic_send_crq(adapter, &crq); 3769 3770 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3771 atomic_inc(&adapter->running_cap_crqs); 3772 ibmvnic_send_crq(adapter, &crq); 3773 3774 crq.query_capability.capability = 3775 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3776 atomic_inc(&adapter->running_cap_crqs); 3777 ibmvnic_send_crq(adapter, &crq); 3778 3779 crq.query_capability.capability = 3780 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3781 atomic_inc(&adapter->running_cap_crqs); 3782 ibmvnic_send_crq(adapter, &crq); 3783 3784 crq.query_capability.capability = 3785 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3786 atomic_inc(&adapter->running_cap_crqs); 3787 ibmvnic_send_crq(adapter, &crq); 3788 3789 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3790 atomic_inc(&adapter->running_cap_crqs); 3791 ibmvnic_send_crq(adapter, &crq); 3792 } 3793 3794 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3795 struct ibmvnic_adapter *adapter) 3796 { 3797 struct device *dev = &adapter->vdev->dev; 3798 3799 if (crq->get_vpd_size_rsp.rc.code) { 3800 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3801 crq->get_vpd_size_rsp.rc.code); 3802 complete(&adapter->fw_done); 3803 return; 3804 } 3805 3806 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3807 complete(&adapter->fw_done); 3808 } 3809 3810 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3811 struct ibmvnic_adapter *adapter) 3812 { 3813 struct device *dev = &adapter->vdev->dev; 3814 unsigned char *substr = NULL; 3815 u8 fw_level_len = 0; 3816 3817 memset(adapter->fw_version, 0, 32); 3818 3819 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3820 DMA_FROM_DEVICE); 3821 3822 if (crq->get_vpd_rsp.rc.code) { 3823 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3824 crq->get_vpd_rsp.rc.code); 3825 goto complete; 3826 } 3827 3828 /* get the position of the firmware version info 3829 * located after the ASCII 'RM' substring in the buffer 3830 */ 3831 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3832 if (!substr) { 3833 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3834 goto complete; 3835 } 3836 3837 /* get length of firmware level ASCII substring */ 3838 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3839 fw_level_len = *(substr + 2); 3840 } else { 3841 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3842 goto complete; 3843 } 3844 3845 /* copy firmware version string from vpd into adapter */ 3846 if ((substr + 3 + fw_level_len) < 3847 (adapter->vpd->buff + adapter->vpd->len)) { 3848 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3849 } else { 3850 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3851 } 3852 3853 complete: 3854 if (adapter->fw_version[0] == '\0') 3855 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3856 complete(&adapter->fw_done); 3857 } 3858 3859 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3860 { 3861 struct device *dev = &adapter->vdev->dev; 3862 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3863 netdev_features_t old_hw_features = 0; 3864 union ibmvnic_crq crq; 3865 int i; 3866 3867 dma_unmap_single(dev, adapter->ip_offload_tok, 3868 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3869 3870 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3871 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3872 netdev_dbg(adapter->netdev, "%016lx\n", 3873 ((unsigned long int *)(buf))[i]); 3874 3875 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3876 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3877 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3878 buf->tcp_ipv4_chksum); 3879 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3880 buf->tcp_ipv6_chksum); 3881 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3882 buf->udp_ipv4_chksum); 3883 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3884 buf->udp_ipv6_chksum); 3885 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3886 buf->large_tx_ipv4); 3887 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3888 buf->large_tx_ipv6); 3889 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3890 buf->large_rx_ipv4); 3891 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3892 buf->large_rx_ipv6); 3893 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3894 buf->max_ipv4_header_size); 3895 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3896 buf->max_ipv6_header_size); 3897 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3898 buf->max_tcp_header_size); 3899 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3900 buf->max_udp_header_size); 3901 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3902 buf->max_large_tx_size); 3903 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3904 buf->max_large_rx_size); 3905 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3906 buf->ipv6_extension_header); 3907 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3908 buf->tcp_pseudosum_req); 3909 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3910 buf->num_ipv6_ext_headers); 3911 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3912 buf->off_ipv6_ext_headers); 3913 3914 adapter->ip_offload_ctrl_tok = 3915 dma_map_single(dev, &adapter->ip_offload_ctrl, 3916 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3917 3918 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3919 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3920 return; 3921 } 3922 3923 adapter->ip_offload_ctrl.len = 3924 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3925 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3926 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3927 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3928 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3929 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3930 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3931 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3932 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3933 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3934 3935 /* large_rx disabled for now, additional features needed */ 3936 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3937 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3938 3939 if (adapter->state != VNIC_PROBING) { 3940 old_hw_features = adapter->netdev->hw_features; 3941 adapter->netdev->hw_features = 0; 3942 } 3943 3944 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 3945 3946 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3947 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 3948 3949 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3950 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 3951 3952 if ((adapter->netdev->features & 3953 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3954 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 3955 3956 if (buf->large_tx_ipv4) 3957 adapter->netdev->hw_features |= NETIF_F_TSO; 3958 if (buf->large_tx_ipv6) 3959 adapter->netdev->hw_features |= NETIF_F_TSO6; 3960 3961 if (adapter->state == VNIC_PROBING) { 3962 adapter->netdev->features |= adapter->netdev->hw_features; 3963 } else if (old_hw_features != adapter->netdev->hw_features) { 3964 netdev_features_t tmp = 0; 3965 3966 /* disable features no longer supported */ 3967 adapter->netdev->features &= adapter->netdev->hw_features; 3968 /* turn on features now supported if previously enabled */ 3969 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 3970 adapter->netdev->hw_features; 3971 adapter->netdev->features |= 3972 tmp & adapter->netdev->wanted_features; 3973 } 3974 3975 memset(&crq, 0, sizeof(crq)); 3976 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3977 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3978 crq.control_ip_offload.len = 3979 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3980 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3981 ibmvnic_send_crq(adapter, &crq); 3982 } 3983 3984 static const char *ibmvnic_fw_err_cause(u16 cause) 3985 { 3986 switch (cause) { 3987 case ADAPTER_PROBLEM: 3988 return "adapter problem"; 3989 case BUS_PROBLEM: 3990 return "bus problem"; 3991 case FW_PROBLEM: 3992 return "firmware problem"; 3993 case DD_PROBLEM: 3994 return "device driver problem"; 3995 case EEH_RECOVERY: 3996 return "EEH recovery"; 3997 case FW_UPDATED: 3998 return "firmware updated"; 3999 case LOW_MEMORY: 4000 return "low Memory"; 4001 default: 4002 return "unknown"; 4003 } 4004 } 4005 4006 static void handle_error_indication(union ibmvnic_crq *crq, 4007 struct ibmvnic_adapter *adapter) 4008 { 4009 struct device *dev = &adapter->vdev->dev; 4010 u16 cause; 4011 4012 cause = be16_to_cpu(crq->error_indication.error_cause); 4013 4014 dev_warn_ratelimited(dev, 4015 "Firmware reports %serror, cause: %s. Starting recovery...\n", 4016 crq->error_indication.flags 4017 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 4018 ibmvnic_fw_err_cause(cause)); 4019 4020 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 4021 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4022 else 4023 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 4024 } 4025 4026 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 4027 struct ibmvnic_adapter *adapter) 4028 { 4029 struct net_device *netdev = adapter->netdev; 4030 struct device *dev = &adapter->vdev->dev; 4031 long rc; 4032 4033 rc = crq->change_mac_addr_rsp.rc.code; 4034 if (rc) { 4035 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 4036 goto out; 4037 } 4038 ether_addr_copy(netdev->dev_addr, 4039 &crq->change_mac_addr_rsp.mac_addr[0]); 4040 out: 4041 complete(&adapter->fw_done); 4042 return rc; 4043 } 4044 4045 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 4046 struct ibmvnic_adapter *adapter) 4047 { 4048 struct device *dev = &adapter->vdev->dev; 4049 u64 *req_value; 4050 char *name; 4051 4052 atomic_dec(&adapter->running_cap_crqs); 4053 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 4054 case REQ_TX_QUEUES: 4055 req_value = &adapter->req_tx_queues; 4056 name = "tx"; 4057 break; 4058 case REQ_RX_QUEUES: 4059 req_value = &adapter->req_rx_queues; 4060 name = "rx"; 4061 break; 4062 case REQ_RX_ADD_QUEUES: 4063 req_value = &adapter->req_rx_add_queues; 4064 name = "rx_add"; 4065 break; 4066 case REQ_TX_ENTRIES_PER_SUBCRQ: 4067 req_value = &adapter->req_tx_entries_per_subcrq; 4068 name = "tx_entries_per_subcrq"; 4069 break; 4070 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 4071 req_value = &adapter->req_rx_add_entries_per_subcrq; 4072 name = "rx_add_entries_per_subcrq"; 4073 break; 4074 case REQ_MTU: 4075 req_value = &adapter->req_mtu; 4076 name = "mtu"; 4077 break; 4078 case PROMISC_REQUESTED: 4079 req_value = &adapter->promisc; 4080 name = "promisc"; 4081 break; 4082 default: 4083 dev_err(dev, "Got invalid cap request rsp %d\n", 4084 crq->request_capability.capability); 4085 return; 4086 } 4087 4088 switch (crq->request_capability_rsp.rc.code) { 4089 case SUCCESS: 4090 break; 4091 case PARTIALSUCCESS: 4092 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 4093 *req_value, 4094 (long int)be64_to_cpu(crq->request_capability_rsp. 4095 number), name); 4096 4097 if (be16_to_cpu(crq->request_capability_rsp.capability) == 4098 REQ_MTU) { 4099 pr_err("mtu of %llu is not supported. Reverting.\n", 4100 *req_value); 4101 *req_value = adapter->fallback.mtu; 4102 } else { 4103 *req_value = 4104 be64_to_cpu(crq->request_capability_rsp.number); 4105 } 4106 4107 ibmvnic_send_req_caps(adapter, 1); 4108 return; 4109 default: 4110 dev_err(dev, "Error %d in request cap rsp\n", 4111 crq->request_capability_rsp.rc.code); 4112 return; 4113 } 4114 4115 /* Done receiving requested capabilities, query IP offload support */ 4116 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4117 union ibmvnic_crq newcrq; 4118 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4119 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4120 &adapter->ip_offload_buf; 4121 4122 adapter->wait_capability = false; 4123 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4124 buf_sz, 4125 DMA_FROM_DEVICE); 4126 4127 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4128 if (!firmware_has_feature(FW_FEATURE_CMO)) 4129 dev_err(dev, "Couldn't map offload buffer\n"); 4130 return; 4131 } 4132 4133 memset(&newcrq, 0, sizeof(newcrq)); 4134 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4135 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4136 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4137 newcrq.query_ip_offload.ioba = 4138 cpu_to_be32(adapter->ip_offload_tok); 4139 4140 ibmvnic_send_crq(adapter, &newcrq); 4141 } 4142 } 4143 4144 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4145 struct ibmvnic_adapter *adapter) 4146 { 4147 struct device *dev = &adapter->vdev->dev; 4148 struct net_device *netdev = adapter->netdev; 4149 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4150 struct ibmvnic_login_buffer *login = adapter->login_buf; 4151 int i; 4152 4153 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4154 DMA_TO_DEVICE); 4155 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4156 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4157 4158 /* If the number of queues requested can't be allocated by the 4159 * server, the login response will return with code 1. We will need 4160 * to resend the login buffer with fewer queues requested. 4161 */ 4162 if (login_rsp_crq->generic.rc.code) { 4163 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4164 complete(&adapter->init_done); 4165 return 0; 4166 } 4167 4168 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4169 4170 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4171 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4172 netdev_dbg(adapter->netdev, "%016lx\n", 4173 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4174 } 4175 4176 /* Sanity checks */ 4177 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4178 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4179 adapter->req_rx_add_queues != 4180 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4181 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4182 ibmvnic_remove(adapter->vdev); 4183 return -EIO; 4184 } 4185 release_login_buffer(adapter); 4186 complete(&adapter->init_done); 4187 4188 return 0; 4189 } 4190 4191 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4192 struct ibmvnic_adapter *adapter) 4193 { 4194 struct device *dev = &adapter->vdev->dev; 4195 long rc; 4196 4197 rc = crq->request_unmap_rsp.rc.code; 4198 if (rc) 4199 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4200 } 4201 4202 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4203 struct ibmvnic_adapter *adapter) 4204 { 4205 struct net_device *netdev = adapter->netdev; 4206 struct device *dev = &adapter->vdev->dev; 4207 long rc; 4208 4209 rc = crq->query_map_rsp.rc.code; 4210 if (rc) { 4211 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4212 return; 4213 } 4214 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4215 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4216 crq->query_map_rsp.free_pages); 4217 } 4218 4219 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4220 struct ibmvnic_adapter *adapter) 4221 { 4222 struct net_device *netdev = adapter->netdev; 4223 struct device *dev = &adapter->vdev->dev; 4224 long rc; 4225 4226 atomic_dec(&adapter->running_cap_crqs); 4227 netdev_dbg(netdev, "Outstanding queries: %d\n", 4228 atomic_read(&adapter->running_cap_crqs)); 4229 rc = crq->query_capability.rc.code; 4230 if (rc) { 4231 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4232 goto out; 4233 } 4234 4235 switch (be16_to_cpu(crq->query_capability.capability)) { 4236 case MIN_TX_QUEUES: 4237 adapter->min_tx_queues = 4238 be64_to_cpu(crq->query_capability.number); 4239 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4240 adapter->min_tx_queues); 4241 break; 4242 case MIN_RX_QUEUES: 4243 adapter->min_rx_queues = 4244 be64_to_cpu(crq->query_capability.number); 4245 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4246 adapter->min_rx_queues); 4247 break; 4248 case MIN_RX_ADD_QUEUES: 4249 adapter->min_rx_add_queues = 4250 be64_to_cpu(crq->query_capability.number); 4251 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4252 adapter->min_rx_add_queues); 4253 break; 4254 case MAX_TX_QUEUES: 4255 adapter->max_tx_queues = 4256 be64_to_cpu(crq->query_capability.number); 4257 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4258 adapter->max_tx_queues); 4259 break; 4260 case MAX_RX_QUEUES: 4261 adapter->max_rx_queues = 4262 be64_to_cpu(crq->query_capability.number); 4263 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4264 adapter->max_rx_queues); 4265 break; 4266 case MAX_RX_ADD_QUEUES: 4267 adapter->max_rx_add_queues = 4268 be64_to_cpu(crq->query_capability.number); 4269 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4270 adapter->max_rx_add_queues); 4271 break; 4272 case MIN_TX_ENTRIES_PER_SUBCRQ: 4273 adapter->min_tx_entries_per_subcrq = 4274 be64_to_cpu(crq->query_capability.number); 4275 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4276 adapter->min_tx_entries_per_subcrq); 4277 break; 4278 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4279 adapter->min_rx_add_entries_per_subcrq = 4280 be64_to_cpu(crq->query_capability.number); 4281 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4282 adapter->min_rx_add_entries_per_subcrq); 4283 break; 4284 case MAX_TX_ENTRIES_PER_SUBCRQ: 4285 adapter->max_tx_entries_per_subcrq = 4286 be64_to_cpu(crq->query_capability.number); 4287 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4288 adapter->max_tx_entries_per_subcrq); 4289 break; 4290 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4291 adapter->max_rx_add_entries_per_subcrq = 4292 be64_to_cpu(crq->query_capability.number); 4293 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4294 adapter->max_rx_add_entries_per_subcrq); 4295 break; 4296 case TCP_IP_OFFLOAD: 4297 adapter->tcp_ip_offload = 4298 be64_to_cpu(crq->query_capability.number); 4299 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4300 adapter->tcp_ip_offload); 4301 break; 4302 case PROMISC_SUPPORTED: 4303 adapter->promisc_supported = 4304 be64_to_cpu(crq->query_capability.number); 4305 netdev_dbg(netdev, "promisc_supported = %lld\n", 4306 adapter->promisc_supported); 4307 break; 4308 case MIN_MTU: 4309 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4310 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4311 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4312 break; 4313 case MAX_MTU: 4314 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4315 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4316 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4317 break; 4318 case MAX_MULTICAST_FILTERS: 4319 adapter->max_multicast_filters = 4320 be64_to_cpu(crq->query_capability.number); 4321 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4322 adapter->max_multicast_filters); 4323 break; 4324 case VLAN_HEADER_INSERTION: 4325 adapter->vlan_header_insertion = 4326 be64_to_cpu(crq->query_capability.number); 4327 if (adapter->vlan_header_insertion) 4328 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4329 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4330 adapter->vlan_header_insertion); 4331 break; 4332 case RX_VLAN_HEADER_INSERTION: 4333 adapter->rx_vlan_header_insertion = 4334 be64_to_cpu(crq->query_capability.number); 4335 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4336 adapter->rx_vlan_header_insertion); 4337 break; 4338 case MAX_TX_SG_ENTRIES: 4339 adapter->max_tx_sg_entries = 4340 be64_to_cpu(crq->query_capability.number); 4341 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4342 adapter->max_tx_sg_entries); 4343 break; 4344 case RX_SG_SUPPORTED: 4345 adapter->rx_sg_supported = 4346 be64_to_cpu(crq->query_capability.number); 4347 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4348 adapter->rx_sg_supported); 4349 break; 4350 case OPT_TX_COMP_SUB_QUEUES: 4351 adapter->opt_tx_comp_sub_queues = 4352 be64_to_cpu(crq->query_capability.number); 4353 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4354 adapter->opt_tx_comp_sub_queues); 4355 break; 4356 case OPT_RX_COMP_QUEUES: 4357 adapter->opt_rx_comp_queues = 4358 be64_to_cpu(crq->query_capability.number); 4359 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4360 adapter->opt_rx_comp_queues); 4361 break; 4362 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4363 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4364 be64_to_cpu(crq->query_capability.number); 4365 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4366 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4367 break; 4368 case OPT_TX_ENTRIES_PER_SUBCRQ: 4369 adapter->opt_tx_entries_per_subcrq = 4370 be64_to_cpu(crq->query_capability.number); 4371 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4372 adapter->opt_tx_entries_per_subcrq); 4373 break; 4374 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4375 adapter->opt_rxba_entries_per_subcrq = 4376 be64_to_cpu(crq->query_capability.number); 4377 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4378 adapter->opt_rxba_entries_per_subcrq); 4379 break; 4380 case TX_RX_DESC_REQ: 4381 adapter->tx_rx_desc_req = crq->query_capability.number; 4382 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4383 adapter->tx_rx_desc_req); 4384 break; 4385 4386 default: 4387 netdev_err(netdev, "Got invalid cap rsp %d\n", 4388 crq->query_capability.capability); 4389 } 4390 4391 out: 4392 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4393 adapter->wait_capability = false; 4394 ibmvnic_send_req_caps(adapter, 0); 4395 } 4396 } 4397 4398 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 4399 { 4400 union ibmvnic_crq crq; 4401 int rc; 4402 4403 memset(&crq, 0, sizeof(crq)); 4404 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 4405 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 4406 init_completion(&adapter->fw_done); 4407 rc = ibmvnic_send_crq(adapter, &crq); 4408 if (rc) 4409 return rc; 4410 wait_for_completion(&adapter->fw_done); 4411 return adapter->fw_done_rc ? -EIO : 0; 4412 } 4413 4414 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 4415 struct ibmvnic_adapter *adapter) 4416 { 4417 struct net_device *netdev = adapter->netdev; 4418 int rc; 4419 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 4420 4421 rc = crq->query_phys_parms_rsp.rc.code; 4422 if (rc) { 4423 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 4424 return rc; 4425 } 4426 switch (rspeed) { 4427 case IBMVNIC_10MBPS: 4428 adapter->speed = SPEED_10; 4429 break; 4430 case IBMVNIC_100MBPS: 4431 adapter->speed = SPEED_100; 4432 break; 4433 case IBMVNIC_1GBPS: 4434 adapter->speed = SPEED_1000; 4435 break; 4436 case IBMVNIC_10GBP: 4437 adapter->speed = SPEED_10000; 4438 break; 4439 case IBMVNIC_25GBPS: 4440 adapter->speed = SPEED_25000; 4441 break; 4442 case IBMVNIC_40GBPS: 4443 adapter->speed = SPEED_40000; 4444 break; 4445 case IBMVNIC_50GBPS: 4446 adapter->speed = SPEED_50000; 4447 break; 4448 case IBMVNIC_100GBPS: 4449 adapter->speed = SPEED_100000; 4450 break; 4451 default: 4452 if (netif_carrier_ok(netdev)) 4453 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 4454 adapter->speed = SPEED_UNKNOWN; 4455 } 4456 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 4457 adapter->duplex = DUPLEX_FULL; 4458 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 4459 adapter->duplex = DUPLEX_HALF; 4460 else 4461 adapter->duplex = DUPLEX_UNKNOWN; 4462 4463 return rc; 4464 } 4465 4466 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4467 struct ibmvnic_adapter *adapter) 4468 { 4469 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4470 struct net_device *netdev = adapter->netdev; 4471 struct device *dev = &adapter->vdev->dev; 4472 u64 *u64_crq = (u64 *)crq; 4473 long rc; 4474 4475 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4476 (unsigned long int)cpu_to_be64(u64_crq[0]), 4477 (unsigned long int)cpu_to_be64(u64_crq[1])); 4478 switch (gen_crq->first) { 4479 case IBMVNIC_CRQ_INIT_RSP: 4480 switch (gen_crq->cmd) { 4481 case IBMVNIC_CRQ_INIT: 4482 dev_info(dev, "Partner initialized\n"); 4483 adapter->from_passive_init = true; 4484 adapter->failover_pending = false; 4485 if (!completion_done(&adapter->init_done)) { 4486 complete(&adapter->init_done); 4487 adapter->init_done_rc = -EIO; 4488 } 4489 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4490 break; 4491 case IBMVNIC_CRQ_INIT_COMPLETE: 4492 dev_info(dev, "Partner initialization complete\n"); 4493 adapter->crq.active = true; 4494 send_version_xchg(adapter); 4495 break; 4496 default: 4497 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4498 } 4499 return; 4500 case IBMVNIC_CRQ_XPORT_EVENT: 4501 netif_carrier_off(netdev); 4502 adapter->crq.active = false; 4503 if (test_bit(0, &adapter->resetting)) 4504 adapter->force_reset_recovery = true; 4505 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4506 dev_info(dev, "Migrated, re-enabling adapter\n"); 4507 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4508 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4509 dev_info(dev, "Backing device failover detected\n"); 4510 adapter->failover_pending = true; 4511 } else { 4512 /* The adapter lost the connection */ 4513 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4514 gen_crq->cmd); 4515 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4516 } 4517 return; 4518 case IBMVNIC_CRQ_CMD_RSP: 4519 break; 4520 default: 4521 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4522 gen_crq->first); 4523 return; 4524 } 4525 4526 switch (gen_crq->cmd) { 4527 case VERSION_EXCHANGE_RSP: 4528 rc = crq->version_exchange_rsp.rc.code; 4529 if (rc) { 4530 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4531 break; 4532 } 4533 dev_info(dev, "Partner protocol version is %d\n", 4534 crq->version_exchange_rsp.version); 4535 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4536 ibmvnic_version) 4537 ibmvnic_version = 4538 be16_to_cpu(crq->version_exchange_rsp.version); 4539 send_cap_queries(adapter); 4540 break; 4541 case QUERY_CAPABILITY_RSP: 4542 handle_query_cap_rsp(crq, adapter); 4543 break; 4544 case QUERY_MAP_RSP: 4545 handle_query_map_rsp(crq, adapter); 4546 break; 4547 case REQUEST_MAP_RSP: 4548 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4549 complete(&adapter->fw_done); 4550 break; 4551 case REQUEST_UNMAP_RSP: 4552 handle_request_unmap_rsp(crq, adapter); 4553 break; 4554 case REQUEST_CAPABILITY_RSP: 4555 handle_request_cap_rsp(crq, adapter); 4556 break; 4557 case LOGIN_RSP: 4558 netdev_dbg(netdev, "Got Login Response\n"); 4559 handle_login_rsp(crq, adapter); 4560 break; 4561 case LOGICAL_LINK_STATE_RSP: 4562 netdev_dbg(netdev, 4563 "Got Logical Link State Response, state: %d rc: %d\n", 4564 crq->logical_link_state_rsp.link_state, 4565 crq->logical_link_state_rsp.rc.code); 4566 adapter->logical_link_state = 4567 crq->logical_link_state_rsp.link_state; 4568 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4569 complete(&adapter->init_done); 4570 break; 4571 case LINK_STATE_INDICATION: 4572 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4573 adapter->phys_link_state = 4574 crq->link_state_indication.phys_link_state; 4575 adapter->logical_link_state = 4576 crq->link_state_indication.logical_link_state; 4577 if (adapter->phys_link_state && adapter->logical_link_state) 4578 netif_carrier_on(netdev); 4579 else 4580 netif_carrier_off(netdev); 4581 break; 4582 case CHANGE_MAC_ADDR_RSP: 4583 netdev_dbg(netdev, "Got MAC address change Response\n"); 4584 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4585 break; 4586 case ERROR_INDICATION: 4587 netdev_dbg(netdev, "Got Error Indication\n"); 4588 handle_error_indication(crq, adapter); 4589 break; 4590 case REQUEST_STATISTICS_RSP: 4591 netdev_dbg(netdev, "Got Statistics Response\n"); 4592 complete(&adapter->stats_done); 4593 break; 4594 case QUERY_IP_OFFLOAD_RSP: 4595 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4596 handle_query_ip_offload_rsp(adapter); 4597 break; 4598 case MULTICAST_CTRL_RSP: 4599 netdev_dbg(netdev, "Got multicast control Response\n"); 4600 break; 4601 case CONTROL_IP_OFFLOAD_RSP: 4602 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4603 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4604 sizeof(adapter->ip_offload_ctrl), 4605 DMA_TO_DEVICE); 4606 complete(&adapter->init_done); 4607 break; 4608 case COLLECT_FW_TRACE_RSP: 4609 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4610 complete(&adapter->fw_done); 4611 break; 4612 case GET_VPD_SIZE_RSP: 4613 handle_vpd_size_rsp(crq, adapter); 4614 break; 4615 case GET_VPD_RSP: 4616 handle_vpd_rsp(crq, adapter); 4617 break; 4618 case QUERY_PHYS_PARMS_RSP: 4619 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 4620 complete(&adapter->fw_done); 4621 break; 4622 default: 4623 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4624 gen_crq->cmd); 4625 } 4626 } 4627 4628 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4629 { 4630 struct ibmvnic_adapter *adapter = instance; 4631 4632 tasklet_schedule(&adapter->tasklet); 4633 return IRQ_HANDLED; 4634 } 4635 4636 static void ibmvnic_tasklet(void *data) 4637 { 4638 struct ibmvnic_adapter *adapter = data; 4639 struct ibmvnic_crq_queue *queue = &adapter->crq; 4640 union ibmvnic_crq *crq; 4641 unsigned long flags; 4642 bool done = false; 4643 4644 spin_lock_irqsave(&queue->lock, flags); 4645 while (!done) { 4646 /* Pull all the valid messages off the CRQ */ 4647 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4648 ibmvnic_handle_crq(crq, adapter); 4649 crq->generic.first = 0; 4650 } 4651 4652 /* remain in tasklet until all 4653 * capabilities responses are received 4654 */ 4655 if (!adapter->wait_capability) 4656 done = true; 4657 } 4658 /* if capabilities CRQ's were sent in this tasklet, the following 4659 * tasklet must wait until all responses are received 4660 */ 4661 if (atomic_read(&adapter->running_cap_crqs) != 0) 4662 adapter->wait_capability = true; 4663 spin_unlock_irqrestore(&queue->lock, flags); 4664 } 4665 4666 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4667 { 4668 struct vio_dev *vdev = adapter->vdev; 4669 int rc; 4670 4671 do { 4672 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4673 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4674 4675 if (rc) 4676 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4677 4678 return rc; 4679 } 4680 4681 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4682 { 4683 struct ibmvnic_crq_queue *crq = &adapter->crq; 4684 struct device *dev = &adapter->vdev->dev; 4685 struct vio_dev *vdev = adapter->vdev; 4686 int rc; 4687 4688 /* Close the CRQ */ 4689 do { 4690 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4691 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4692 4693 /* Clean out the queue */ 4694 memset(crq->msgs, 0, PAGE_SIZE); 4695 crq->cur = 0; 4696 crq->active = false; 4697 4698 /* And re-open it again */ 4699 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4700 crq->msg_token, PAGE_SIZE); 4701 4702 if (rc == H_CLOSED) 4703 /* Adapter is good, but other end is not ready */ 4704 dev_warn(dev, "Partner adapter not ready\n"); 4705 else if (rc != 0) 4706 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4707 4708 return rc; 4709 } 4710 4711 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4712 { 4713 struct ibmvnic_crq_queue *crq = &adapter->crq; 4714 struct vio_dev *vdev = adapter->vdev; 4715 long rc; 4716 4717 if (!crq->msgs) 4718 return; 4719 4720 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4721 free_irq(vdev->irq, adapter); 4722 tasklet_kill(&adapter->tasklet); 4723 do { 4724 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4725 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4726 4727 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4728 DMA_BIDIRECTIONAL); 4729 free_page((unsigned long)crq->msgs); 4730 crq->msgs = NULL; 4731 crq->active = false; 4732 } 4733 4734 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4735 { 4736 struct ibmvnic_crq_queue *crq = &adapter->crq; 4737 struct device *dev = &adapter->vdev->dev; 4738 struct vio_dev *vdev = adapter->vdev; 4739 int rc, retrc = -ENOMEM; 4740 4741 if (crq->msgs) 4742 return 0; 4743 4744 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4745 /* Should we allocate more than one page? */ 4746 4747 if (!crq->msgs) 4748 return -ENOMEM; 4749 4750 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4751 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4752 DMA_BIDIRECTIONAL); 4753 if (dma_mapping_error(dev, crq->msg_token)) 4754 goto map_failed; 4755 4756 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4757 crq->msg_token, PAGE_SIZE); 4758 4759 if (rc == H_RESOURCE) 4760 /* maybe kexecing and resource is busy. try a reset */ 4761 rc = ibmvnic_reset_crq(adapter); 4762 retrc = rc; 4763 4764 if (rc == H_CLOSED) { 4765 dev_warn(dev, "Partner adapter not ready\n"); 4766 } else if (rc) { 4767 dev_warn(dev, "Error %d opening adapter\n", rc); 4768 goto reg_crq_failed; 4769 } 4770 4771 retrc = 0; 4772 4773 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4774 (unsigned long)adapter); 4775 4776 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4777 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 4778 adapter->vdev->unit_address); 4779 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 4780 if (rc) { 4781 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4782 vdev->irq, rc); 4783 goto req_irq_failed; 4784 } 4785 4786 rc = vio_enable_interrupts(vdev); 4787 if (rc) { 4788 dev_err(dev, "Error %d enabling interrupts\n", rc); 4789 goto req_irq_failed; 4790 } 4791 4792 crq->cur = 0; 4793 spin_lock_init(&crq->lock); 4794 4795 return retrc; 4796 4797 req_irq_failed: 4798 tasklet_kill(&adapter->tasklet); 4799 do { 4800 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4801 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4802 reg_crq_failed: 4803 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4804 map_failed: 4805 free_page((unsigned long)crq->msgs); 4806 crq->msgs = NULL; 4807 return retrc; 4808 } 4809 4810 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4811 { 4812 struct device *dev = &adapter->vdev->dev; 4813 unsigned long timeout = msecs_to_jiffies(30000); 4814 u64 old_num_rx_queues, old_num_tx_queues; 4815 int rc; 4816 4817 adapter->from_passive_init = false; 4818 4819 old_num_rx_queues = adapter->req_rx_queues; 4820 old_num_tx_queues = adapter->req_tx_queues; 4821 4822 reinit_completion(&adapter->init_done); 4823 adapter->init_done_rc = 0; 4824 ibmvnic_send_crq_init(adapter); 4825 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4826 dev_err(dev, "Initialization sequence timed out\n"); 4827 return -1; 4828 } 4829 4830 if (adapter->init_done_rc) { 4831 release_crq_queue(adapter); 4832 return adapter->init_done_rc; 4833 } 4834 4835 if (adapter->from_passive_init) { 4836 adapter->state = VNIC_OPEN; 4837 adapter->from_passive_init = false; 4838 return -1; 4839 } 4840 4841 if (test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 4842 adapter->reset_reason != VNIC_RESET_MOBILITY) { 4843 if (adapter->req_rx_queues != old_num_rx_queues || 4844 adapter->req_tx_queues != old_num_tx_queues) { 4845 release_sub_crqs(adapter, 0); 4846 rc = init_sub_crqs(adapter); 4847 } else { 4848 rc = reset_sub_crq_queues(adapter); 4849 } 4850 } else { 4851 rc = init_sub_crqs(adapter); 4852 } 4853 4854 if (rc) { 4855 dev_err(dev, "Initialization of sub crqs failed\n"); 4856 release_crq_queue(adapter); 4857 return rc; 4858 } 4859 4860 rc = init_sub_crq_irqs(adapter); 4861 if (rc) { 4862 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4863 release_crq_queue(adapter); 4864 } 4865 4866 return rc; 4867 } 4868 4869 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4870 { 4871 struct device *dev = &adapter->vdev->dev; 4872 unsigned long timeout = msecs_to_jiffies(30000); 4873 int rc; 4874 4875 adapter->from_passive_init = false; 4876 4877 adapter->init_done_rc = 0; 4878 ibmvnic_send_crq_init(adapter); 4879 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4880 dev_err(dev, "Initialization sequence timed out\n"); 4881 return -1; 4882 } 4883 4884 if (adapter->init_done_rc) { 4885 release_crq_queue(adapter); 4886 return adapter->init_done_rc; 4887 } 4888 4889 if (adapter->from_passive_init) { 4890 adapter->state = VNIC_OPEN; 4891 adapter->from_passive_init = false; 4892 return -1; 4893 } 4894 4895 rc = init_sub_crqs(adapter); 4896 if (rc) { 4897 dev_err(dev, "Initialization of sub crqs failed\n"); 4898 release_crq_queue(adapter); 4899 return rc; 4900 } 4901 4902 rc = init_sub_crq_irqs(adapter); 4903 if (rc) { 4904 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4905 release_crq_queue(adapter); 4906 } 4907 4908 return rc; 4909 } 4910 4911 static struct device_attribute dev_attr_failover; 4912 4913 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4914 { 4915 struct ibmvnic_adapter *adapter; 4916 struct net_device *netdev; 4917 unsigned char *mac_addr_p; 4918 int rc; 4919 4920 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4921 dev->unit_address); 4922 4923 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4924 VETH_MAC_ADDR, NULL); 4925 if (!mac_addr_p) { 4926 dev_err(&dev->dev, 4927 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4928 __FILE__, __LINE__); 4929 return 0; 4930 } 4931 4932 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4933 IBMVNIC_MAX_QUEUES); 4934 if (!netdev) 4935 return -ENOMEM; 4936 4937 adapter = netdev_priv(netdev); 4938 adapter->state = VNIC_PROBING; 4939 dev_set_drvdata(&dev->dev, netdev); 4940 adapter->vdev = dev; 4941 adapter->netdev = netdev; 4942 4943 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4944 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4945 netdev->irq = dev->irq; 4946 netdev->netdev_ops = &ibmvnic_netdev_ops; 4947 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4948 SET_NETDEV_DEV(netdev, &dev->dev); 4949 4950 spin_lock_init(&adapter->stats_lock); 4951 4952 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4953 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 4954 __ibmvnic_delayed_reset); 4955 INIT_LIST_HEAD(&adapter->rwi_list); 4956 spin_lock_init(&adapter->rwi_lock); 4957 init_completion(&adapter->init_done); 4958 clear_bit(0, &adapter->resetting); 4959 4960 do { 4961 rc = init_crq_queue(adapter); 4962 if (rc) { 4963 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 4964 rc); 4965 goto ibmvnic_init_fail; 4966 } 4967 4968 rc = ibmvnic_init(adapter); 4969 if (rc && rc != EAGAIN) 4970 goto ibmvnic_init_fail; 4971 } while (rc == EAGAIN); 4972 4973 rc = init_stats_buffers(adapter); 4974 if (rc) 4975 goto ibmvnic_init_fail; 4976 4977 rc = init_stats_token(adapter); 4978 if (rc) 4979 goto ibmvnic_stats_fail; 4980 4981 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4982 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4983 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4984 4985 rc = device_create_file(&dev->dev, &dev_attr_failover); 4986 if (rc) 4987 goto ibmvnic_dev_file_err; 4988 4989 netif_carrier_off(netdev); 4990 rc = register_netdev(netdev); 4991 if (rc) { 4992 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4993 goto ibmvnic_register_fail; 4994 } 4995 dev_info(&dev->dev, "ibmvnic registered\n"); 4996 4997 adapter->state = VNIC_PROBED; 4998 4999 adapter->wait_for_reset = false; 5000 5001 return 0; 5002 5003 ibmvnic_register_fail: 5004 device_remove_file(&dev->dev, &dev_attr_failover); 5005 5006 ibmvnic_dev_file_err: 5007 release_stats_token(adapter); 5008 5009 ibmvnic_stats_fail: 5010 release_stats_buffers(adapter); 5011 5012 ibmvnic_init_fail: 5013 release_sub_crqs(adapter, 1); 5014 release_crq_queue(adapter); 5015 free_netdev(netdev); 5016 5017 return rc; 5018 } 5019 5020 static int ibmvnic_remove(struct vio_dev *dev) 5021 { 5022 struct net_device *netdev = dev_get_drvdata(&dev->dev); 5023 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5024 5025 adapter->state = VNIC_REMOVING; 5026 rtnl_lock(); 5027 unregister_netdevice(netdev); 5028 5029 release_resources(adapter); 5030 release_sub_crqs(adapter, 1); 5031 release_crq_queue(adapter); 5032 5033 release_stats_token(adapter); 5034 release_stats_buffers(adapter); 5035 5036 adapter->state = VNIC_REMOVED; 5037 5038 rtnl_unlock(); 5039 device_remove_file(&dev->dev, &dev_attr_failover); 5040 free_netdev(netdev); 5041 dev_set_drvdata(&dev->dev, NULL); 5042 5043 return 0; 5044 } 5045 5046 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 5047 const char *buf, size_t count) 5048 { 5049 struct net_device *netdev = dev_get_drvdata(dev); 5050 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5051 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 5052 __be64 session_token; 5053 long rc; 5054 5055 if (!sysfs_streq(buf, "1")) 5056 return -EINVAL; 5057 5058 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 5059 H_GET_SESSION_TOKEN, 0, 0, 0); 5060 if (rc) { 5061 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 5062 rc); 5063 return -EINVAL; 5064 } 5065 5066 session_token = (__be64)retbuf[0]; 5067 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 5068 be64_to_cpu(session_token)); 5069 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 5070 H_SESSION_ERR_DETECTED, session_token, 0, 0); 5071 if (rc) { 5072 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 5073 rc); 5074 return -EINVAL; 5075 } 5076 5077 return count; 5078 } 5079 5080 static DEVICE_ATTR_WO(failover); 5081 5082 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 5083 { 5084 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 5085 struct ibmvnic_adapter *adapter; 5086 struct iommu_table *tbl; 5087 unsigned long ret = 0; 5088 int i; 5089 5090 tbl = get_iommu_table_base(&vdev->dev); 5091 5092 /* netdev inits at probe time along with the structures we need below*/ 5093 if (!netdev) 5094 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 5095 5096 adapter = netdev_priv(netdev); 5097 5098 ret += PAGE_SIZE; /* the crq message queue */ 5099 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 5100 5101 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 5102 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 5103 5104 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5105 i++) 5106 ret += adapter->rx_pool[i].size * 5107 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 5108 5109 return ret; 5110 } 5111 5112 static int ibmvnic_resume(struct device *dev) 5113 { 5114 struct net_device *netdev = dev_get_drvdata(dev); 5115 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 5116 5117 if (adapter->state != VNIC_OPEN) 5118 return 0; 5119 5120 tasklet_schedule(&adapter->tasklet); 5121 5122 return 0; 5123 } 5124 5125 static const struct vio_device_id ibmvnic_device_table[] = { 5126 {"network", "IBM,vnic"}, 5127 {"", "" } 5128 }; 5129 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 5130 5131 static const struct dev_pm_ops ibmvnic_pm_ops = { 5132 .resume = ibmvnic_resume 5133 }; 5134 5135 static struct vio_driver ibmvnic_driver = { 5136 .id_table = ibmvnic_device_table, 5137 .probe = ibmvnic_probe, 5138 .remove = ibmvnic_remove, 5139 .get_desired_dma = ibmvnic_get_desired_dma, 5140 .name = ibmvnic_driver_name, 5141 .pm = &ibmvnic_pm_ops, 5142 }; 5143 5144 /* module functions */ 5145 static int __init ibmvnic_module_init(void) 5146 { 5147 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 5148 IBMVNIC_DRIVER_VERSION); 5149 5150 return vio_register_driver(&ibmvnic_driver); 5151 } 5152 5153 static void __exit ibmvnic_module_exit(void) 5154 { 5155 vio_unregister_driver(&ibmvnic_driver); 5156 } 5157 5158 module_init(ibmvnic_module_init); 5159 module_exit(ibmvnic_module_exit); 5160