1 /**************************************************************************/ 2 /* */ 3 /* IBM System i and System p Virtual NIC Device Driver */ 4 /* Copyright (C) 2014 IBM Corp. */ 5 /* Santiago Leon (santi_leon@yahoo.com) */ 6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 7 /* John Allen (jallen@linux.vnet.ibm.com) */ 8 /* */ 9 /* This program is free software; you can redistribute it and/or modify */ 10 /* it under the terms of the GNU General Public License as published by */ 11 /* the Free Software Foundation; either version 2 of the License, or */ 12 /* (at your option) any later version. */ 13 /* */ 14 /* This program is distributed in the hope that it will be useful, */ 15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 17 /* GNU General Public License for more details. */ 18 /* */ 19 /* You should have received a copy of the GNU General Public License */ 20 /* along with this program. */ 21 /* */ 22 /* This module contains the implementation of a virtual ethernet device */ 23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 24 /* option of the RS/6000 Platform Architecture to interface with virtual */ 25 /* ethernet NICs that are presented to the partition by the hypervisor. */ 26 /* */ 27 /* Messages are passed between the VNIC driver and the VNIC server using */ 28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 29 /* issue and receive commands that initiate communication with the server */ 30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 31 /* are used by the driver to notify the server that a packet is */ 32 /* ready for transmission or that a buffer has been added to receive a */ 33 /* packet. Subsequently, sCRQs are used by the server to notify the */ 34 /* driver that a packet transmission has been completed or that a packet */ 35 /* has been received and placed in a waiting buffer. */ 36 /* */ 37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 38 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 39 /* or receive has been completed, the VNIC driver is required to use */ 40 /* "long term mapping". This entails that large, continuous DMA mapped */ 41 /* buffers are allocated on driver initialization and these buffers are */ 42 /* then continuously reused to pass skbs to and from the VNIC server. */ 43 /* */ 44 /**************************************************************************/ 45 46 #include <linux/module.h> 47 #include <linux/moduleparam.h> 48 #include <linux/types.h> 49 #include <linux/errno.h> 50 #include <linux/completion.h> 51 #include <linux/ioport.h> 52 #include <linux/dma-mapping.h> 53 #include <linux/kernel.h> 54 #include <linux/netdevice.h> 55 #include <linux/etherdevice.h> 56 #include <linux/skbuff.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/mm.h> 60 #include <linux/ethtool.h> 61 #include <linux/proc_fs.h> 62 #include <linux/if_arp.h> 63 #include <linux/in.h> 64 #include <linux/ip.h> 65 #include <linux/ipv6.h> 66 #include <linux/irq.h> 67 #include <linux/kthread.h> 68 #include <linux/seq_file.h> 69 #include <linux/interrupt.h> 70 #include <net/net_namespace.h> 71 #include <asm/hvcall.h> 72 #include <linux/atomic.h> 73 #include <asm/vio.h> 74 #include <asm/iommu.h> 75 #include <linux/uaccess.h> 76 #include <asm/firmware.h> 77 #include <linux/workqueue.h> 78 #include <linux/if_vlan.h> 79 #include <linux/utsname.h> 80 81 #include "ibmvnic.h" 82 83 static const char ibmvnic_driver_name[] = "ibmvnic"; 84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 85 86 MODULE_AUTHOR("Santiago Leon"); 87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 88 MODULE_LICENSE("GPL"); 89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 90 91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 92 static int ibmvnic_remove(struct vio_dev *); 93 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 99 union sub_crq *sub_crq); 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 102 static int enable_scrq_irq(struct ibmvnic_adapter *, 103 struct ibmvnic_sub_crq_queue *); 104 static int disable_scrq_irq(struct ibmvnic_adapter *, 105 struct ibmvnic_sub_crq_queue *); 106 static int pending_scrq(struct ibmvnic_adapter *, 107 struct ibmvnic_sub_crq_queue *); 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 109 struct ibmvnic_sub_crq_queue *); 110 static int ibmvnic_poll(struct napi_struct *napi, int data); 111 static void send_map_query(struct ibmvnic_adapter *adapter); 112 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 113 static void send_request_unmap(struct ibmvnic_adapter *, u8); 114 static int send_login(struct ibmvnic_adapter *adapter); 115 static void send_cap_queries(struct ibmvnic_adapter *adapter); 116 static int init_sub_crqs(struct ibmvnic_adapter *); 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 118 static int ibmvnic_init(struct ibmvnic_adapter *); 119 static void release_crq_queue(struct ibmvnic_adapter *); 120 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p); 121 122 struct ibmvnic_stat { 123 char name[ETH_GSTRING_LEN]; 124 int offset; 125 }; 126 127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 128 offsetof(struct ibmvnic_statistics, stat)) 129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 130 131 static const struct ibmvnic_stat ibmvnic_stats[] = { 132 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 133 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 134 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 135 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 136 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 137 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 138 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 139 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 140 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 141 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 142 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 143 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 144 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 145 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 146 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 147 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 148 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 149 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 150 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 151 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 152 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 153 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 154 }; 155 156 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 157 unsigned long length, unsigned long *number, 158 unsigned long *irq) 159 { 160 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 161 long rc; 162 163 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 164 *number = retbuf[0]; 165 *irq = retbuf[1]; 166 167 return rc; 168 } 169 170 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 171 struct ibmvnic_long_term_buff *ltb, int size) 172 { 173 struct device *dev = &adapter->vdev->dev; 174 175 ltb->size = size; 176 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 177 GFP_KERNEL); 178 179 if (!ltb->buff) { 180 dev_err(dev, "Couldn't alloc long term buffer\n"); 181 return -ENOMEM; 182 } 183 ltb->map_id = adapter->map_id; 184 adapter->map_id++; 185 186 init_completion(&adapter->fw_done); 187 send_request_map(adapter, ltb->addr, 188 ltb->size, ltb->map_id); 189 wait_for_completion(&adapter->fw_done); 190 191 if (adapter->fw_done_rc) { 192 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 193 adapter->fw_done_rc); 194 return -1; 195 } 196 return 0; 197 } 198 199 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 200 struct ibmvnic_long_term_buff *ltb) 201 { 202 struct device *dev = &adapter->vdev->dev; 203 204 if (!ltb->buff) 205 return; 206 207 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 208 adapter->reset_reason != VNIC_RESET_MOBILITY) 209 send_request_unmap(adapter, ltb->map_id); 210 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 211 } 212 213 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 214 struct ibmvnic_long_term_buff *ltb) 215 { 216 memset(ltb->buff, 0, ltb->size); 217 218 init_completion(&adapter->fw_done); 219 send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 220 wait_for_completion(&adapter->fw_done); 221 222 if (adapter->fw_done_rc) { 223 dev_info(&adapter->vdev->dev, 224 "Reset failed, attempting to free and reallocate buffer\n"); 225 free_long_term_buff(adapter, ltb); 226 return alloc_long_term_buff(adapter, ltb, ltb->size); 227 } 228 return 0; 229 } 230 231 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 232 { 233 int i; 234 235 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 236 i++) 237 adapter->rx_pool[i].active = 0; 238 } 239 240 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 241 struct ibmvnic_rx_pool *pool) 242 { 243 int count = pool->size - atomic_read(&pool->available); 244 struct device *dev = &adapter->vdev->dev; 245 int buffers_added = 0; 246 unsigned long lpar_rc; 247 union sub_crq sub_crq; 248 struct sk_buff *skb; 249 unsigned int offset; 250 dma_addr_t dma_addr; 251 unsigned char *dst; 252 u64 *handle_array; 253 int shift = 0; 254 int index; 255 int i; 256 257 if (!pool->active) 258 return; 259 260 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 261 be32_to_cpu(adapter->login_rsp_buf-> 262 off_rxadd_subcrqs)); 263 264 for (i = 0; i < count; ++i) { 265 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 266 if (!skb) { 267 dev_err(dev, "Couldn't replenish rx buff\n"); 268 adapter->replenish_no_mem++; 269 break; 270 } 271 272 index = pool->free_map[pool->next_free]; 273 274 if (pool->rx_buff[index].skb) 275 dev_err(dev, "Inconsistent free_map!\n"); 276 277 /* Copy the skb to the long term mapped DMA buffer */ 278 offset = index * pool->buff_size; 279 dst = pool->long_term_buff.buff + offset; 280 memset(dst, 0, pool->buff_size); 281 dma_addr = pool->long_term_buff.addr + offset; 282 pool->rx_buff[index].data = dst; 283 284 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 285 pool->rx_buff[index].dma = dma_addr; 286 pool->rx_buff[index].skb = skb; 287 pool->rx_buff[index].pool_index = pool->index; 288 pool->rx_buff[index].size = pool->buff_size; 289 290 memset(&sub_crq, 0, sizeof(sub_crq)); 291 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 292 sub_crq.rx_add.correlator = 293 cpu_to_be64((u64)&pool->rx_buff[index]); 294 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 295 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 296 297 /* The length field of the sCRQ is defined to be 24 bits so the 298 * buffer size needs to be left shifted by a byte before it is 299 * converted to big endian to prevent the last byte from being 300 * truncated. 301 */ 302 #ifdef __LITTLE_ENDIAN__ 303 shift = 8; 304 #endif 305 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 306 307 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 308 &sub_crq); 309 if (lpar_rc != H_SUCCESS) 310 goto failure; 311 312 buffers_added++; 313 adapter->replenish_add_buff_success++; 314 pool->next_free = (pool->next_free + 1) % pool->size; 315 } 316 atomic_add(buffers_added, &pool->available); 317 return; 318 319 failure: 320 dev_info(dev, "replenish pools failure\n"); 321 pool->free_map[pool->next_free] = index; 322 pool->rx_buff[index].skb = NULL; 323 if (!dma_mapping_error(dev, dma_addr)) 324 dma_unmap_single(dev, dma_addr, pool->buff_size, 325 DMA_FROM_DEVICE); 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) { 332 /* Disable buffer pool replenishment and report carrier off if 333 * queue is closed. Firmware guarantees that a signal will 334 * be sent to the driver, triggering a reset. 335 */ 336 deactivate_rx_pools(adapter); 337 netif_carrier_off(adapter->netdev); 338 } 339 } 340 341 static void replenish_pools(struct ibmvnic_adapter *adapter) 342 { 343 int i; 344 345 adapter->replenish_task_cycles++; 346 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 347 i++) { 348 if (adapter->rx_pool[i].active) 349 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 350 } 351 } 352 353 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 354 { 355 kfree(adapter->tx_stats_buffers); 356 kfree(adapter->rx_stats_buffers); 357 adapter->tx_stats_buffers = NULL; 358 adapter->rx_stats_buffers = NULL; 359 } 360 361 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 362 { 363 adapter->tx_stats_buffers = 364 kcalloc(IBMVNIC_MAX_QUEUES, 365 sizeof(struct ibmvnic_tx_queue_stats), 366 GFP_KERNEL); 367 if (!adapter->tx_stats_buffers) 368 return -ENOMEM; 369 370 adapter->rx_stats_buffers = 371 kcalloc(IBMVNIC_MAX_QUEUES, 372 sizeof(struct ibmvnic_rx_queue_stats), 373 GFP_KERNEL); 374 if (!adapter->rx_stats_buffers) 375 return -ENOMEM; 376 377 return 0; 378 } 379 380 static void release_stats_token(struct ibmvnic_adapter *adapter) 381 { 382 struct device *dev = &adapter->vdev->dev; 383 384 if (!adapter->stats_token) 385 return; 386 387 dma_unmap_single(dev, adapter->stats_token, 388 sizeof(struct ibmvnic_statistics), 389 DMA_FROM_DEVICE); 390 adapter->stats_token = 0; 391 } 392 393 static int init_stats_token(struct ibmvnic_adapter *adapter) 394 { 395 struct device *dev = &adapter->vdev->dev; 396 dma_addr_t stok; 397 398 stok = dma_map_single(dev, &adapter->stats, 399 sizeof(struct ibmvnic_statistics), 400 DMA_FROM_DEVICE); 401 if (dma_mapping_error(dev, stok)) { 402 dev_err(dev, "Couldn't map stats buffer\n"); 403 return -1; 404 } 405 406 adapter->stats_token = stok; 407 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 408 return 0; 409 } 410 411 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 412 { 413 struct ibmvnic_rx_pool *rx_pool; 414 int rx_scrqs; 415 int i, j, rc; 416 u64 *size_array; 417 418 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 419 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 420 421 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 422 for (i = 0; i < rx_scrqs; i++) { 423 rx_pool = &adapter->rx_pool[i]; 424 425 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 426 427 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) { 428 free_long_term_buff(adapter, &rx_pool->long_term_buff); 429 rx_pool->buff_size = be64_to_cpu(size_array[i]); 430 alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 431 rx_pool->size * 432 rx_pool->buff_size); 433 } else { 434 rc = reset_long_term_buff(adapter, 435 &rx_pool->long_term_buff); 436 } 437 438 if (rc) 439 return rc; 440 441 for (j = 0; j < rx_pool->size; j++) 442 rx_pool->free_map[j] = j; 443 444 memset(rx_pool->rx_buff, 0, 445 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 446 447 atomic_set(&rx_pool->available, 0); 448 rx_pool->next_alloc = 0; 449 rx_pool->next_free = 0; 450 rx_pool->active = 1; 451 } 452 453 return 0; 454 } 455 456 static void release_rx_pools(struct ibmvnic_adapter *adapter) 457 { 458 struct ibmvnic_rx_pool *rx_pool; 459 int i, j; 460 461 if (!adapter->rx_pool) 462 return; 463 464 for (i = 0; i < adapter->num_active_rx_pools; i++) { 465 rx_pool = &adapter->rx_pool[i]; 466 467 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 468 469 kfree(rx_pool->free_map); 470 free_long_term_buff(adapter, &rx_pool->long_term_buff); 471 472 if (!rx_pool->rx_buff) 473 continue; 474 475 for (j = 0; j < rx_pool->size; j++) { 476 if (rx_pool->rx_buff[j].skb) { 477 dev_kfree_skb_any(rx_pool->rx_buff[i].skb); 478 rx_pool->rx_buff[i].skb = NULL; 479 } 480 } 481 482 kfree(rx_pool->rx_buff); 483 } 484 485 kfree(adapter->rx_pool); 486 adapter->rx_pool = NULL; 487 adapter->num_active_rx_pools = 0; 488 } 489 490 static int init_rx_pools(struct net_device *netdev) 491 { 492 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 493 struct device *dev = &adapter->vdev->dev; 494 struct ibmvnic_rx_pool *rx_pool; 495 int rxadd_subcrqs; 496 u64 *size_array; 497 int i, j; 498 499 rxadd_subcrqs = 500 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 501 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 502 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 503 504 adapter->rx_pool = kcalloc(rxadd_subcrqs, 505 sizeof(struct ibmvnic_rx_pool), 506 GFP_KERNEL); 507 if (!adapter->rx_pool) { 508 dev_err(dev, "Failed to allocate rx pools\n"); 509 return -1; 510 } 511 512 adapter->num_active_rx_pools = rxadd_subcrqs; 513 514 for (i = 0; i < rxadd_subcrqs; i++) { 515 rx_pool = &adapter->rx_pool[i]; 516 517 netdev_dbg(adapter->netdev, 518 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 519 i, adapter->req_rx_add_entries_per_subcrq, 520 be64_to_cpu(size_array[i])); 521 522 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 523 rx_pool->index = i; 524 rx_pool->buff_size = be64_to_cpu(size_array[i]); 525 rx_pool->active = 1; 526 527 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 528 GFP_KERNEL); 529 if (!rx_pool->free_map) { 530 release_rx_pools(adapter); 531 return -1; 532 } 533 534 rx_pool->rx_buff = kcalloc(rx_pool->size, 535 sizeof(struct ibmvnic_rx_buff), 536 GFP_KERNEL); 537 if (!rx_pool->rx_buff) { 538 dev_err(dev, "Couldn't alloc rx buffers\n"); 539 release_rx_pools(adapter); 540 return -1; 541 } 542 543 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 544 rx_pool->size * rx_pool->buff_size)) { 545 release_rx_pools(adapter); 546 return -1; 547 } 548 549 for (j = 0; j < rx_pool->size; ++j) 550 rx_pool->free_map[j] = j; 551 552 atomic_set(&rx_pool->available, 0); 553 rx_pool->next_alloc = 0; 554 rx_pool->next_free = 0; 555 } 556 557 return 0; 558 } 559 560 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 561 struct ibmvnic_tx_pool *tx_pool) 562 { 563 int rc, i; 564 565 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 566 if (rc) 567 return rc; 568 569 memset(tx_pool->tx_buff, 0, 570 tx_pool->num_buffers * 571 sizeof(struct ibmvnic_tx_buff)); 572 573 for (i = 0; i < tx_pool->num_buffers; i++) 574 tx_pool->free_map[i] = i; 575 576 tx_pool->consumer_index = 0; 577 tx_pool->producer_index = 0; 578 579 return 0; 580 } 581 582 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 583 { 584 int tx_scrqs; 585 int i, rc; 586 587 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 588 for (i = 0; i < tx_scrqs; i++) { 589 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 590 if (rc) 591 return rc; 592 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 593 if (rc) 594 return rc; 595 } 596 597 return 0; 598 } 599 600 static void release_vpd_data(struct ibmvnic_adapter *adapter) 601 { 602 if (!adapter->vpd) 603 return; 604 605 kfree(adapter->vpd->buff); 606 kfree(adapter->vpd); 607 608 adapter->vpd = NULL; 609 } 610 611 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 612 struct ibmvnic_tx_pool *tx_pool) 613 { 614 kfree(tx_pool->tx_buff); 615 kfree(tx_pool->free_map); 616 free_long_term_buff(adapter, &tx_pool->long_term_buff); 617 } 618 619 static void release_tx_pools(struct ibmvnic_adapter *adapter) 620 { 621 int i; 622 623 if (!adapter->tx_pool) 624 return; 625 626 for (i = 0; i < adapter->num_active_tx_pools; i++) { 627 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 628 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 629 } 630 631 kfree(adapter->tx_pool); 632 adapter->tx_pool = NULL; 633 kfree(adapter->tso_pool); 634 adapter->tso_pool = NULL; 635 adapter->num_active_tx_pools = 0; 636 } 637 638 static int init_one_tx_pool(struct net_device *netdev, 639 struct ibmvnic_tx_pool *tx_pool, 640 int num_entries, int buf_size) 641 { 642 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 643 int i; 644 645 tx_pool->tx_buff = kcalloc(num_entries, 646 sizeof(struct ibmvnic_tx_buff), 647 GFP_KERNEL); 648 if (!tx_pool->tx_buff) 649 return -1; 650 651 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 652 num_entries * buf_size)) 653 return -1; 654 655 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 656 if (!tx_pool->free_map) 657 return -1; 658 659 for (i = 0; i < num_entries; i++) 660 tx_pool->free_map[i] = i; 661 662 tx_pool->consumer_index = 0; 663 tx_pool->producer_index = 0; 664 tx_pool->num_buffers = num_entries; 665 tx_pool->buf_size = buf_size; 666 667 return 0; 668 } 669 670 static int init_tx_pools(struct net_device *netdev) 671 { 672 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 673 int tx_subcrqs; 674 int i, rc; 675 676 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 677 adapter->tx_pool = kcalloc(tx_subcrqs, 678 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 679 if (!adapter->tx_pool) 680 return -1; 681 682 adapter->tso_pool = kcalloc(tx_subcrqs, 683 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 684 if (!adapter->tso_pool) 685 return -1; 686 687 adapter->num_active_tx_pools = tx_subcrqs; 688 689 for (i = 0; i < tx_subcrqs; i++) { 690 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 691 adapter->req_tx_entries_per_subcrq, 692 adapter->req_mtu + VLAN_HLEN); 693 if (rc) { 694 release_tx_pools(adapter); 695 return rc; 696 } 697 698 init_one_tx_pool(netdev, &adapter->tso_pool[i], 699 IBMVNIC_TSO_BUFS, 700 IBMVNIC_TSO_BUF_SZ); 701 if (rc) { 702 release_tx_pools(adapter); 703 return rc; 704 } 705 } 706 707 return 0; 708 } 709 710 static void release_error_buffers(struct ibmvnic_adapter *adapter) 711 { 712 struct device *dev = &adapter->vdev->dev; 713 struct ibmvnic_error_buff *error_buff, *tmp; 714 unsigned long flags; 715 716 spin_lock_irqsave(&adapter->error_list_lock, flags); 717 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) { 718 list_del(&error_buff->list); 719 dma_unmap_single(dev, error_buff->dma, error_buff->len, 720 DMA_FROM_DEVICE); 721 kfree(error_buff->buff); 722 kfree(error_buff); 723 } 724 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 725 } 726 727 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 728 { 729 int i; 730 731 if (adapter->napi_enabled) 732 return; 733 734 for (i = 0; i < adapter->req_rx_queues; i++) 735 napi_enable(&adapter->napi[i]); 736 737 adapter->napi_enabled = true; 738 } 739 740 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 741 { 742 int i; 743 744 if (!adapter->napi_enabled) 745 return; 746 747 for (i = 0; i < adapter->req_rx_queues; i++) { 748 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 749 napi_disable(&adapter->napi[i]); 750 } 751 752 adapter->napi_enabled = false; 753 } 754 755 static int init_napi(struct ibmvnic_adapter *adapter) 756 { 757 int i; 758 759 adapter->napi = kcalloc(adapter->req_rx_queues, 760 sizeof(struct napi_struct), GFP_KERNEL); 761 if (!adapter->napi) 762 return -ENOMEM; 763 764 for (i = 0; i < adapter->req_rx_queues; i++) { 765 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 766 netif_napi_add(adapter->netdev, &adapter->napi[i], 767 ibmvnic_poll, NAPI_POLL_WEIGHT); 768 } 769 770 adapter->num_active_rx_napi = adapter->req_rx_queues; 771 return 0; 772 } 773 774 static void release_napi(struct ibmvnic_adapter *adapter) 775 { 776 int i; 777 778 if (!adapter->napi) 779 return; 780 781 for (i = 0; i < adapter->num_active_rx_napi; i++) { 782 if (&adapter->napi[i]) { 783 netdev_dbg(adapter->netdev, 784 "Releasing napi[%d]\n", i); 785 netif_napi_del(&adapter->napi[i]); 786 } 787 } 788 789 kfree(adapter->napi); 790 adapter->napi = NULL; 791 adapter->num_active_rx_napi = 0; 792 } 793 794 static int ibmvnic_login(struct net_device *netdev) 795 { 796 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 797 unsigned long timeout = msecs_to_jiffies(30000); 798 struct device *dev = &adapter->vdev->dev; 799 int rc; 800 801 do { 802 if (adapter->renegotiate) { 803 adapter->renegotiate = false; 804 release_sub_crqs(adapter, 1); 805 806 reinit_completion(&adapter->init_done); 807 send_cap_queries(adapter); 808 if (!wait_for_completion_timeout(&adapter->init_done, 809 timeout)) { 810 dev_err(dev, "Capabilities query timeout\n"); 811 return -1; 812 } 813 rc = init_sub_crqs(adapter); 814 if (rc) { 815 dev_err(dev, 816 "Initialization of SCRQ's failed\n"); 817 return -1; 818 } 819 rc = init_sub_crq_irqs(adapter); 820 if (rc) { 821 dev_err(dev, 822 "Initialization of SCRQ's irqs failed\n"); 823 return -1; 824 } 825 } 826 827 reinit_completion(&adapter->init_done); 828 rc = send_login(adapter); 829 if (rc) { 830 dev_err(dev, "Unable to attempt device login\n"); 831 return rc; 832 } else if (!wait_for_completion_timeout(&adapter->init_done, 833 timeout)) { 834 dev_err(dev, "Login timeout\n"); 835 return -1; 836 } 837 } while (adapter->renegotiate); 838 839 /* handle pending MAC address changes after successful login */ 840 if (adapter->mac_change_pending) { 841 __ibmvnic_set_mac(netdev, &adapter->desired.mac); 842 adapter->mac_change_pending = false; 843 } 844 845 return 0; 846 } 847 848 static void release_login_buffer(struct ibmvnic_adapter *adapter) 849 { 850 kfree(adapter->login_buf); 851 adapter->login_buf = NULL; 852 } 853 854 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 855 { 856 kfree(adapter->login_rsp_buf); 857 adapter->login_rsp_buf = NULL; 858 } 859 860 static void release_resources(struct ibmvnic_adapter *adapter) 861 { 862 release_vpd_data(adapter); 863 864 release_tx_pools(adapter); 865 release_rx_pools(adapter); 866 867 release_error_buffers(adapter); 868 release_napi(adapter); 869 release_login_rsp_buffer(adapter); 870 } 871 872 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 873 { 874 struct net_device *netdev = adapter->netdev; 875 unsigned long timeout = msecs_to_jiffies(30000); 876 union ibmvnic_crq crq; 877 bool resend; 878 int rc; 879 880 netdev_dbg(netdev, "setting link state %d\n", link_state); 881 882 memset(&crq, 0, sizeof(crq)); 883 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 884 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 885 crq.logical_link_state.link_state = link_state; 886 887 do { 888 resend = false; 889 890 reinit_completion(&adapter->init_done); 891 rc = ibmvnic_send_crq(adapter, &crq); 892 if (rc) { 893 netdev_err(netdev, "Failed to set link state\n"); 894 return rc; 895 } 896 897 if (!wait_for_completion_timeout(&adapter->init_done, 898 timeout)) { 899 netdev_err(netdev, "timeout setting link state\n"); 900 return -1; 901 } 902 903 if (adapter->init_done_rc == 1) { 904 /* Partuial success, delay and re-send */ 905 mdelay(1000); 906 resend = true; 907 } 908 } while (resend); 909 910 return 0; 911 } 912 913 static int set_real_num_queues(struct net_device *netdev) 914 { 915 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 916 int rc; 917 918 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 919 adapter->req_tx_queues, adapter->req_rx_queues); 920 921 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 922 if (rc) { 923 netdev_err(netdev, "failed to set the number of tx queues\n"); 924 return rc; 925 } 926 927 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 928 if (rc) 929 netdev_err(netdev, "failed to set the number of rx queues\n"); 930 931 return rc; 932 } 933 934 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 935 { 936 struct device *dev = &adapter->vdev->dev; 937 union ibmvnic_crq crq; 938 int len = 0; 939 940 if (adapter->vpd->buff) 941 len = adapter->vpd->len; 942 943 init_completion(&adapter->fw_done); 944 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 945 crq.get_vpd_size.cmd = GET_VPD_SIZE; 946 ibmvnic_send_crq(adapter, &crq); 947 wait_for_completion(&adapter->fw_done); 948 949 if (!adapter->vpd->len) 950 return -ENODATA; 951 952 if (!adapter->vpd->buff) 953 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 954 else if (adapter->vpd->len != len) 955 adapter->vpd->buff = 956 krealloc(adapter->vpd->buff, 957 adapter->vpd->len, GFP_KERNEL); 958 959 if (!adapter->vpd->buff) { 960 dev_err(dev, "Could allocate VPD buffer\n"); 961 return -ENOMEM; 962 } 963 964 adapter->vpd->dma_addr = 965 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 966 DMA_FROM_DEVICE); 967 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 968 dev_err(dev, "Could not map VPD buffer\n"); 969 kfree(adapter->vpd->buff); 970 adapter->vpd->buff = NULL; 971 return -ENOMEM; 972 } 973 974 reinit_completion(&adapter->fw_done); 975 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 976 crq.get_vpd.cmd = GET_VPD; 977 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 978 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 979 ibmvnic_send_crq(adapter, &crq); 980 wait_for_completion(&adapter->fw_done); 981 982 return 0; 983 } 984 985 static int init_resources(struct ibmvnic_adapter *adapter) 986 { 987 struct net_device *netdev = adapter->netdev; 988 int rc; 989 990 rc = set_real_num_queues(netdev); 991 if (rc) 992 return rc; 993 994 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 995 if (!adapter->vpd) 996 return -ENOMEM; 997 998 /* Vital Product Data (VPD) */ 999 rc = ibmvnic_get_vpd(adapter); 1000 if (rc) { 1001 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1002 return rc; 1003 } 1004 1005 adapter->map_id = 1; 1006 1007 rc = init_napi(adapter); 1008 if (rc) 1009 return rc; 1010 1011 send_map_query(adapter); 1012 1013 rc = init_rx_pools(netdev); 1014 if (rc) 1015 return rc; 1016 1017 rc = init_tx_pools(netdev); 1018 return rc; 1019 } 1020 1021 static int __ibmvnic_open(struct net_device *netdev) 1022 { 1023 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1024 enum vnic_state prev_state = adapter->state; 1025 int i, rc; 1026 1027 adapter->state = VNIC_OPENING; 1028 replenish_pools(adapter); 1029 ibmvnic_napi_enable(adapter); 1030 1031 /* We're ready to receive frames, enable the sub-crq interrupts and 1032 * set the logical link state to up 1033 */ 1034 for (i = 0; i < adapter->req_rx_queues; i++) { 1035 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1036 if (prev_state == VNIC_CLOSED) 1037 enable_irq(adapter->rx_scrq[i]->irq); 1038 else 1039 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1040 } 1041 1042 for (i = 0; i < adapter->req_tx_queues; i++) { 1043 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1044 if (prev_state == VNIC_CLOSED) 1045 enable_irq(adapter->tx_scrq[i]->irq); 1046 else 1047 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1048 } 1049 1050 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1051 if (rc) { 1052 for (i = 0; i < adapter->req_rx_queues; i++) 1053 napi_disable(&adapter->napi[i]); 1054 release_resources(adapter); 1055 return rc; 1056 } 1057 1058 netif_tx_start_all_queues(netdev); 1059 1060 if (prev_state == VNIC_CLOSED) { 1061 for (i = 0; i < adapter->req_rx_queues; i++) 1062 napi_schedule(&adapter->napi[i]); 1063 } 1064 1065 adapter->state = VNIC_OPEN; 1066 return rc; 1067 } 1068 1069 static int ibmvnic_open(struct net_device *netdev) 1070 { 1071 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1072 int rc; 1073 1074 mutex_lock(&adapter->reset_lock); 1075 1076 if (adapter->state != VNIC_CLOSED) { 1077 rc = ibmvnic_login(netdev); 1078 if (rc) { 1079 mutex_unlock(&adapter->reset_lock); 1080 return rc; 1081 } 1082 1083 rc = init_resources(adapter); 1084 if (rc) { 1085 netdev_err(netdev, "failed to initialize resources\n"); 1086 release_resources(adapter); 1087 mutex_unlock(&adapter->reset_lock); 1088 return rc; 1089 } 1090 } 1091 1092 rc = __ibmvnic_open(netdev); 1093 netif_carrier_on(netdev); 1094 1095 mutex_unlock(&adapter->reset_lock); 1096 1097 return rc; 1098 } 1099 1100 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1101 { 1102 struct ibmvnic_rx_pool *rx_pool; 1103 struct ibmvnic_rx_buff *rx_buff; 1104 u64 rx_entries; 1105 int rx_scrqs; 1106 int i, j; 1107 1108 if (!adapter->rx_pool) 1109 return; 1110 1111 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 1112 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1113 1114 /* Free any remaining skbs in the rx buffer pools */ 1115 for (i = 0; i < rx_scrqs; i++) { 1116 rx_pool = &adapter->rx_pool[i]; 1117 if (!rx_pool || !rx_pool->rx_buff) 1118 continue; 1119 1120 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1121 for (j = 0; j < rx_entries; j++) { 1122 rx_buff = &rx_pool->rx_buff[j]; 1123 if (rx_buff && rx_buff->skb) { 1124 dev_kfree_skb_any(rx_buff->skb); 1125 rx_buff->skb = NULL; 1126 } 1127 } 1128 } 1129 } 1130 1131 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1132 struct ibmvnic_tx_pool *tx_pool) 1133 { 1134 struct ibmvnic_tx_buff *tx_buff; 1135 u64 tx_entries; 1136 int i; 1137 1138 if (!tx_pool || !tx_pool->tx_buff) 1139 return; 1140 1141 tx_entries = tx_pool->num_buffers; 1142 1143 for (i = 0; i < tx_entries; i++) { 1144 tx_buff = &tx_pool->tx_buff[i]; 1145 if (tx_buff && tx_buff->skb) { 1146 dev_kfree_skb_any(tx_buff->skb); 1147 tx_buff->skb = NULL; 1148 } 1149 } 1150 } 1151 1152 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1153 { 1154 int tx_scrqs; 1155 int i; 1156 1157 if (!adapter->tx_pool || !adapter->tso_pool) 1158 return; 1159 1160 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 1161 1162 /* Free any remaining skbs in the tx buffer pools */ 1163 for (i = 0; i < tx_scrqs; i++) { 1164 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1165 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1166 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1167 } 1168 } 1169 1170 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1171 { 1172 struct net_device *netdev = adapter->netdev; 1173 int i; 1174 1175 if (adapter->tx_scrq) { 1176 for (i = 0; i < adapter->req_tx_queues; i++) 1177 if (adapter->tx_scrq[i]->irq) { 1178 netdev_dbg(netdev, 1179 "Disabling tx_scrq[%d] irq\n", i); 1180 disable_irq(adapter->tx_scrq[i]->irq); 1181 } 1182 } 1183 1184 if (adapter->rx_scrq) { 1185 for (i = 0; i < adapter->req_rx_queues; i++) { 1186 if (adapter->rx_scrq[i]->irq) { 1187 netdev_dbg(netdev, 1188 "Disabling rx_scrq[%d] irq\n", i); 1189 disable_irq(adapter->rx_scrq[i]->irq); 1190 } 1191 } 1192 } 1193 } 1194 1195 static void ibmvnic_cleanup(struct net_device *netdev) 1196 { 1197 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1198 1199 /* ensure that transmissions are stopped if called by do_reset */ 1200 if (adapter->resetting) 1201 netif_tx_disable(netdev); 1202 else 1203 netif_tx_stop_all_queues(netdev); 1204 1205 ibmvnic_napi_disable(adapter); 1206 ibmvnic_disable_irqs(adapter); 1207 1208 clean_rx_pools(adapter); 1209 clean_tx_pools(adapter); 1210 } 1211 1212 static int __ibmvnic_close(struct net_device *netdev) 1213 { 1214 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1215 int rc = 0; 1216 1217 adapter->state = VNIC_CLOSING; 1218 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1219 if (rc) 1220 return rc; 1221 ibmvnic_cleanup(netdev); 1222 adapter->state = VNIC_CLOSED; 1223 return 0; 1224 } 1225 1226 static int ibmvnic_close(struct net_device *netdev) 1227 { 1228 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1229 int rc; 1230 1231 mutex_lock(&adapter->reset_lock); 1232 rc = __ibmvnic_close(netdev); 1233 mutex_unlock(&adapter->reset_lock); 1234 1235 return rc; 1236 } 1237 1238 /** 1239 * build_hdr_data - creates L2/L3/L4 header data buffer 1240 * @hdr_field - bitfield determining needed headers 1241 * @skb - socket buffer 1242 * @hdr_len - array of header lengths 1243 * @tot_len - total length of data 1244 * 1245 * Reads hdr_field to determine which headers are needed by firmware. 1246 * Builds a buffer containing these headers. Saves individual header 1247 * lengths and total buffer length to be used to build descriptors. 1248 */ 1249 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1250 int *hdr_len, u8 *hdr_data) 1251 { 1252 int len = 0; 1253 u8 *hdr; 1254 1255 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1256 hdr_len[0] = sizeof(struct vlan_ethhdr); 1257 else 1258 hdr_len[0] = sizeof(struct ethhdr); 1259 1260 if (skb->protocol == htons(ETH_P_IP)) { 1261 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1262 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1263 hdr_len[2] = tcp_hdrlen(skb); 1264 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1265 hdr_len[2] = sizeof(struct udphdr); 1266 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1267 hdr_len[1] = sizeof(struct ipv6hdr); 1268 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1269 hdr_len[2] = tcp_hdrlen(skb); 1270 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1271 hdr_len[2] = sizeof(struct udphdr); 1272 } else if (skb->protocol == htons(ETH_P_ARP)) { 1273 hdr_len[1] = arp_hdr_len(skb->dev); 1274 hdr_len[2] = 0; 1275 } 1276 1277 memset(hdr_data, 0, 120); 1278 if ((hdr_field >> 6) & 1) { 1279 hdr = skb_mac_header(skb); 1280 memcpy(hdr_data, hdr, hdr_len[0]); 1281 len += hdr_len[0]; 1282 } 1283 1284 if ((hdr_field >> 5) & 1) { 1285 hdr = skb_network_header(skb); 1286 memcpy(hdr_data + len, hdr, hdr_len[1]); 1287 len += hdr_len[1]; 1288 } 1289 1290 if ((hdr_field >> 4) & 1) { 1291 hdr = skb_transport_header(skb); 1292 memcpy(hdr_data + len, hdr, hdr_len[2]); 1293 len += hdr_len[2]; 1294 } 1295 return len; 1296 } 1297 1298 /** 1299 * create_hdr_descs - create header and header extension descriptors 1300 * @hdr_field - bitfield determining needed headers 1301 * @data - buffer containing header data 1302 * @len - length of data buffer 1303 * @hdr_len - array of individual header lengths 1304 * @scrq_arr - descriptor array 1305 * 1306 * Creates header and, if needed, header extension descriptors and 1307 * places them in a descriptor array, scrq_arr 1308 */ 1309 1310 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1311 union sub_crq *scrq_arr) 1312 { 1313 union sub_crq hdr_desc; 1314 int tmp_len = len; 1315 int num_descs = 0; 1316 u8 *data, *cur; 1317 int tmp; 1318 1319 while (tmp_len > 0) { 1320 cur = hdr_data + len - tmp_len; 1321 1322 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1323 if (cur != hdr_data) { 1324 data = hdr_desc.hdr_ext.data; 1325 tmp = tmp_len > 29 ? 29 : tmp_len; 1326 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1327 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1328 hdr_desc.hdr_ext.len = tmp; 1329 } else { 1330 data = hdr_desc.hdr.data; 1331 tmp = tmp_len > 24 ? 24 : tmp_len; 1332 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1333 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1334 hdr_desc.hdr.len = tmp; 1335 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1336 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1337 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1338 hdr_desc.hdr.flag = hdr_field << 1; 1339 } 1340 memcpy(data, cur, tmp); 1341 tmp_len -= tmp; 1342 *scrq_arr = hdr_desc; 1343 scrq_arr++; 1344 num_descs++; 1345 } 1346 1347 return num_descs; 1348 } 1349 1350 /** 1351 * build_hdr_descs_arr - build a header descriptor array 1352 * @skb - socket buffer 1353 * @num_entries - number of descriptors to be sent 1354 * @subcrq - first TX descriptor 1355 * @hdr_field - bit field determining which headers will be sent 1356 * 1357 * This function will build a TX descriptor array with applicable 1358 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1359 */ 1360 1361 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1362 int *num_entries, u8 hdr_field) 1363 { 1364 int hdr_len[3] = {0, 0, 0}; 1365 int tot_len; 1366 u8 *hdr_data = txbuff->hdr_data; 1367 1368 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1369 txbuff->hdr_data); 1370 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1371 txbuff->indir_arr + 1); 1372 } 1373 1374 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1375 struct net_device *netdev) 1376 { 1377 /* For some backing devices, mishandling of small packets 1378 * can result in a loss of connection or TX stall. Device 1379 * architects recommend that no packet should be smaller 1380 * than the minimum MTU value provided to the driver, so 1381 * pad any packets to that length 1382 */ 1383 if (skb->len < netdev->min_mtu) 1384 return skb_put_padto(skb, netdev->min_mtu); 1385 1386 return 0; 1387 } 1388 1389 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1390 { 1391 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1392 int queue_num = skb_get_queue_mapping(skb); 1393 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1394 struct device *dev = &adapter->vdev->dev; 1395 struct ibmvnic_tx_buff *tx_buff = NULL; 1396 struct ibmvnic_sub_crq_queue *tx_scrq; 1397 struct ibmvnic_tx_pool *tx_pool; 1398 unsigned int tx_send_failed = 0; 1399 unsigned int tx_map_failed = 0; 1400 unsigned int tx_dropped = 0; 1401 unsigned int tx_packets = 0; 1402 unsigned int tx_bytes = 0; 1403 dma_addr_t data_dma_addr; 1404 struct netdev_queue *txq; 1405 unsigned long lpar_rc; 1406 union sub_crq tx_crq; 1407 unsigned int offset; 1408 int num_entries = 1; 1409 unsigned char *dst; 1410 u64 *handle_array; 1411 int index = 0; 1412 u8 proto = 0; 1413 int ret = 0; 1414 1415 if (adapter->resetting) { 1416 if (!netif_subqueue_stopped(netdev, skb)) 1417 netif_stop_subqueue(netdev, queue_num); 1418 dev_kfree_skb_any(skb); 1419 1420 tx_send_failed++; 1421 tx_dropped++; 1422 ret = NETDEV_TX_OK; 1423 goto out; 1424 } 1425 1426 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1427 tx_dropped++; 1428 tx_send_failed++; 1429 ret = NETDEV_TX_OK; 1430 goto out; 1431 } 1432 if (skb_is_gso(skb)) 1433 tx_pool = &adapter->tso_pool[queue_num]; 1434 else 1435 tx_pool = &adapter->tx_pool[queue_num]; 1436 1437 tx_scrq = adapter->tx_scrq[queue_num]; 1438 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1439 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1440 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1441 1442 index = tx_pool->free_map[tx_pool->consumer_index]; 1443 1444 if (index == IBMVNIC_INVALID_MAP) { 1445 dev_kfree_skb_any(skb); 1446 tx_send_failed++; 1447 tx_dropped++; 1448 ret = NETDEV_TX_OK; 1449 goto out; 1450 } 1451 1452 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1453 1454 offset = index * tx_pool->buf_size; 1455 dst = tx_pool->long_term_buff.buff + offset; 1456 memset(dst, 0, tx_pool->buf_size); 1457 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1458 1459 if (skb_shinfo(skb)->nr_frags) { 1460 int cur, i; 1461 1462 /* Copy the head */ 1463 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1464 cur = skb_headlen(skb); 1465 1466 /* Copy the frags */ 1467 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1468 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1469 1470 memcpy(dst + cur, 1471 page_address(skb_frag_page(frag)) + 1472 frag->page_offset, skb_frag_size(frag)); 1473 cur += skb_frag_size(frag); 1474 } 1475 } else { 1476 skb_copy_from_linear_data(skb, dst, skb->len); 1477 } 1478 1479 tx_pool->consumer_index = 1480 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1481 1482 tx_buff = &tx_pool->tx_buff[index]; 1483 tx_buff->skb = skb; 1484 tx_buff->data_dma[0] = data_dma_addr; 1485 tx_buff->data_len[0] = skb->len; 1486 tx_buff->index = index; 1487 tx_buff->pool_index = queue_num; 1488 tx_buff->last_frag = true; 1489 1490 memset(&tx_crq, 0, sizeof(tx_crq)); 1491 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1492 tx_crq.v1.type = IBMVNIC_TX_DESC; 1493 tx_crq.v1.n_crq_elem = 1; 1494 tx_crq.v1.n_sge = 1; 1495 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1496 1497 if (skb_is_gso(skb)) 1498 tx_crq.v1.correlator = 1499 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1500 else 1501 tx_crq.v1.correlator = cpu_to_be32(index); 1502 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1503 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1504 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1505 1506 if (adapter->vlan_header_insertion) { 1507 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1508 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1509 } 1510 1511 if (skb->protocol == htons(ETH_P_IP)) { 1512 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1513 proto = ip_hdr(skb)->protocol; 1514 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1515 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1516 proto = ipv6_hdr(skb)->nexthdr; 1517 } 1518 1519 if (proto == IPPROTO_TCP) 1520 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1521 else if (proto == IPPROTO_UDP) 1522 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1523 1524 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1525 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1526 hdrs += 2; 1527 } 1528 if (skb_is_gso(skb)) { 1529 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1530 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1531 hdrs += 2; 1532 } 1533 /* determine if l2/3/4 headers are sent to firmware */ 1534 if ((*hdrs >> 7) & 1) { 1535 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1536 tx_crq.v1.n_crq_elem = num_entries; 1537 tx_buff->num_entries = num_entries; 1538 tx_buff->indir_arr[0] = tx_crq; 1539 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1540 sizeof(tx_buff->indir_arr), 1541 DMA_TO_DEVICE); 1542 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1543 dev_kfree_skb_any(skb); 1544 tx_buff->skb = NULL; 1545 if (!firmware_has_feature(FW_FEATURE_CMO)) 1546 dev_err(dev, "tx: unable to map descriptor array\n"); 1547 tx_map_failed++; 1548 tx_dropped++; 1549 ret = NETDEV_TX_OK; 1550 goto tx_err_out; 1551 } 1552 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1553 (u64)tx_buff->indir_dma, 1554 (u64)num_entries); 1555 } else { 1556 tx_buff->num_entries = num_entries; 1557 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1558 &tx_crq); 1559 } 1560 if (lpar_rc != H_SUCCESS) { 1561 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 1562 dev_kfree_skb_any(skb); 1563 tx_buff->skb = NULL; 1564 1565 if (lpar_rc == H_CLOSED) { 1566 /* Disable TX and report carrier off if queue is closed. 1567 * Firmware guarantees that a signal will be sent to the 1568 * driver, triggering a reset or some other action. 1569 */ 1570 netif_tx_stop_all_queues(netdev); 1571 netif_carrier_off(netdev); 1572 } 1573 1574 tx_send_failed++; 1575 tx_dropped++; 1576 ret = NETDEV_TX_OK; 1577 goto tx_err_out; 1578 } 1579 1580 if (atomic_add_return(num_entries, &tx_scrq->used) 1581 >= adapter->req_tx_entries_per_subcrq) { 1582 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1583 netif_stop_subqueue(netdev, queue_num); 1584 } 1585 1586 tx_packets++; 1587 tx_bytes += skb->len; 1588 txq->trans_start = jiffies; 1589 ret = NETDEV_TX_OK; 1590 goto out; 1591 1592 tx_err_out: 1593 /* roll back consumer index and map array*/ 1594 if (tx_pool->consumer_index == 0) 1595 tx_pool->consumer_index = 1596 tx_pool->num_buffers - 1; 1597 else 1598 tx_pool->consumer_index--; 1599 tx_pool->free_map[tx_pool->consumer_index] = index; 1600 out: 1601 netdev->stats.tx_dropped += tx_dropped; 1602 netdev->stats.tx_bytes += tx_bytes; 1603 netdev->stats.tx_packets += tx_packets; 1604 adapter->tx_send_failed += tx_send_failed; 1605 adapter->tx_map_failed += tx_map_failed; 1606 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1607 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1608 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1609 1610 return ret; 1611 } 1612 1613 static void ibmvnic_set_multi(struct net_device *netdev) 1614 { 1615 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1616 struct netdev_hw_addr *ha; 1617 union ibmvnic_crq crq; 1618 1619 memset(&crq, 0, sizeof(crq)); 1620 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1621 crq.request_capability.cmd = REQUEST_CAPABILITY; 1622 1623 if (netdev->flags & IFF_PROMISC) { 1624 if (!adapter->promisc_supported) 1625 return; 1626 } else { 1627 if (netdev->flags & IFF_ALLMULTI) { 1628 /* Accept all multicast */ 1629 memset(&crq, 0, sizeof(crq)); 1630 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1631 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1632 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1633 ibmvnic_send_crq(adapter, &crq); 1634 } else if (netdev_mc_empty(netdev)) { 1635 /* Reject all multicast */ 1636 memset(&crq, 0, sizeof(crq)); 1637 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1638 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1639 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1640 ibmvnic_send_crq(adapter, &crq); 1641 } else { 1642 /* Accept one or more multicast(s) */ 1643 netdev_for_each_mc_addr(ha, netdev) { 1644 memset(&crq, 0, sizeof(crq)); 1645 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1646 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1647 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1648 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1649 ha->addr); 1650 ibmvnic_send_crq(adapter, &crq); 1651 } 1652 } 1653 } 1654 } 1655 1656 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p) 1657 { 1658 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1659 struct sockaddr *addr = p; 1660 union ibmvnic_crq crq; 1661 1662 if (!is_valid_ether_addr(addr->sa_data)) 1663 return -EADDRNOTAVAIL; 1664 1665 memset(&crq, 0, sizeof(crq)); 1666 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1667 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1668 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1669 1670 init_completion(&adapter->fw_done); 1671 ibmvnic_send_crq(adapter, &crq); 1672 wait_for_completion(&adapter->fw_done); 1673 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1674 return adapter->fw_done_rc ? -EIO : 0; 1675 } 1676 1677 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1678 { 1679 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1680 struct sockaddr *addr = p; 1681 int rc; 1682 1683 if (adapter->state == VNIC_PROBED) { 1684 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); 1685 adapter->mac_change_pending = true; 1686 return 0; 1687 } 1688 1689 rc = __ibmvnic_set_mac(netdev, addr); 1690 1691 return rc; 1692 } 1693 1694 /** 1695 * do_reset returns zero if we are able to keep processing reset events, or 1696 * non-zero if we hit a fatal error and must halt. 1697 */ 1698 static int do_reset(struct ibmvnic_adapter *adapter, 1699 struct ibmvnic_rwi *rwi, u32 reset_state) 1700 { 1701 u64 old_num_rx_queues, old_num_tx_queues; 1702 struct net_device *netdev = adapter->netdev; 1703 int i, rc; 1704 1705 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1706 rwi->reset_reason); 1707 1708 netif_carrier_off(netdev); 1709 adapter->reset_reason = rwi->reset_reason; 1710 1711 old_num_rx_queues = adapter->req_rx_queues; 1712 old_num_tx_queues = adapter->req_tx_queues; 1713 1714 if (rwi->reset_reason == VNIC_RESET_MOBILITY) { 1715 rc = ibmvnic_reenable_crq_queue(adapter); 1716 if (rc) 1717 return 0; 1718 ibmvnic_cleanup(netdev); 1719 } else if (rwi->reset_reason == VNIC_RESET_FAILOVER) { 1720 ibmvnic_cleanup(netdev); 1721 } else { 1722 rc = __ibmvnic_close(netdev); 1723 if (rc) 1724 return rc; 1725 } 1726 1727 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1728 adapter->wait_for_reset) { 1729 release_resources(adapter); 1730 release_sub_crqs(adapter, 1); 1731 release_crq_queue(adapter); 1732 } 1733 1734 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1735 /* remove the closed state so when we call open it appears 1736 * we are coming from the probed state. 1737 */ 1738 adapter->state = VNIC_PROBED; 1739 1740 rc = ibmvnic_init(adapter); 1741 if (rc) 1742 return IBMVNIC_INIT_FAILED; 1743 1744 /* If the adapter was in PROBE state prior to the reset, 1745 * exit here. 1746 */ 1747 if (reset_state == VNIC_PROBED) 1748 return 0; 1749 1750 rc = ibmvnic_login(netdev); 1751 if (rc) { 1752 adapter->state = VNIC_PROBED; 1753 return 0; 1754 } 1755 1756 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1757 adapter->wait_for_reset) { 1758 rc = init_resources(adapter); 1759 if (rc) 1760 return rc; 1761 } else if (adapter->req_rx_queues != old_num_rx_queues || 1762 adapter->req_tx_queues != old_num_tx_queues) { 1763 adapter->map_id = 1; 1764 release_rx_pools(adapter); 1765 release_tx_pools(adapter); 1766 init_rx_pools(netdev); 1767 init_tx_pools(netdev); 1768 1769 release_napi(adapter); 1770 init_napi(adapter); 1771 } else { 1772 rc = reset_tx_pools(adapter); 1773 if (rc) 1774 return rc; 1775 1776 rc = reset_rx_pools(adapter); 1777 if (rc) 1778 return rc; 1779 } 1780 } 1781 1782 ibmvnic_disable_irqs(adapter); 1783 adapter->state = VNIC_CLOSED; 1784 1785 if (reset_state == VNIC_CLOSED) 1786 return 0; 1787 1788 rc = __ibmvnic_open(netdev); 1789 if (rc) { 1790 if (list_empty(&adapter->rwi_list)) 1791 adapter->state = VNIC_CLOSED; 1792 else 1793 adapter->state = reset_state; 1794 1795 return 0; 1796 } 1797 1798 /* kick napi */ 1799 for (i = 0; i < adapter->req_rx_queues; i++) 1800 napi_schedule(&adapter->napi[i]); 1801 1802 if (adapter->reset_reason != VNIC_RESET_FAILOVER) 1803 netdev_notify_peers(netdev); 1804 1805 netif_carrier_on(netdev); 1806 1807 return 0; 1808 } 1809 1810 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1811 { 1812 struct ibmvnic_rwi *rwi; 1813 1814 mutex_lock(&adapter->rwi_lock); 1815 1816 if (!list_empty(&adapter->rwi_list)) { 1817 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1818 list); 1819 list_del(&rwi->list); 1820 } else { 1821 rwi = NULL; 1822 } 1823 1824 mutex_unlock(&adapter->rwi_lock); 1825 return rwi; 1826 } 1827 1828 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1829 { 1830 struct ibmvnic_rwi *rwi; 1831 1832 rwi = get_next_rwi(adapter); 1833 while (rwi) { 1834 kfree(rwi); 1835 rwi = get_next_rwi(adapter); 1836 } 1837 } 1838 1839 static void __ibmvnic_reset(struct work_struct *work) 1840 { 1841 struct ibmvnic_rwi *rwi; 1842 struct ibmvnic_adapter *adapter; 1843 struct net_device *netdev; 1844 u32 reset_state; 1845 int rc = 0; 1846 1847 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1848 netdev = adapter->netdev; 1849 1850 mutex_lock(&adapter->reset_lock); 1851 adapter->resetting = true; 1852 reset_state = adapter->state; 1853 1854 rwi = get_next_rwi(adapter); 1855 while (rwi) { 1856 rc = do_reset(adapter, rwi, reset_state); 1857 kfree(rwi); 1858 if (rc && rc != IBMVNIC_INIT_FAILED) 1859 break; 1860 1861 rwi = get_next_rwi(adapter); 1862 } 1863 1864 if (adapter->wait_for_reset) { 1865 adapter->wait_for_reset = false; 1866 adapter->reset_done_rc = rc; 1867 complete(&adapter->reset_done); 1868 } 1869 1870 if (rc) { 1871 netdev_dbg(adapter->netdev, "Reset failed\n"); 1872 free_all_rwi(adapter); 1873 mutex_unlock(&adapter->reset_lock); 1874 return; 1875 } 1876 1877 adapter->resetting = false; 1878 mutex_unlock(&adapter->reset_lock); 1879 } 1880 1881 static void ibmvnic_reset(struct ibmvnic_adapter *adapter, 1882 enum ibmvnic_reset_reason reason) 1883 { 1884 struct ibmvnic_rwi *rwi, *tmp; 1885 struct net_device *netdev = adapter->netdev; 1886 struct list_head *entry; 1887 1888 if (adapter->state == VNIC_REMOVING || 1889 adapter->state == VNIC_REMOVED) { 1890 netdev_dbg(netdev, "Adapter removing, skipping reset\n"); 1891 return; 1892 } 1893 1894 if (adapter->state == VNIC_PROBING) { 1895 netdev_warn(netdev, "Adapter reset during probe\n"); 1896 adapter->init_done_rc = EAGAIN; 1897 return; 1898 } 1899 1900 mutex_lock(&adapter->rwi_lock); 1901 1902 list_for_each(entry, &adapter->rwi_list) { 1903 tmp = list_entry(entry, struct ibmvnic_rwi, list); 1904 if (tmp->reset_reason == reason) { 1905 netdev_dbg(netdev, "Skipping matching reset\n"); 1906 mutex_unlock(&adapter->rwi_lock); 1907 return; 1908 } 1909 } 1910 1911 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL); 1912 if (!rwi) { 1913 mutex_unlock(&adapter->rwi_lock); 1914 ibmvnic_close(netdev); 1915 return; 1916 } 1917 1918 rwi->reset_reason = reason; 1919 list_add_tail(&rwi->list, &adapter->rwi_list); 1920 mutex_unlock(&adapter->rwi_lock); 1921 1922 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 1923 schedule_work(&adapter->ibmvnic_reset); 1924 } 1925 1926 static void ibmvnic_tx_timeout(struct net_device *dev) 1927 { 1928 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1929 1930 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 1931 } 1932 1933 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 1934 struct ibmvnic_rx_buff *rx_buff) 1935 { 1936 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 1937 1938 rx_buff->skb = NULL; 1939 1940 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 1941 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 1942 1943 atomic_dec(&pool->available); 1944 } 1945 1946 static int ibmvnic_poll(struct napi_struct *napi, int budget) 1947 { 1948 struct net_device *netdev = napi->dev; 1949 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1950 int scrq_num = (int)(napi - adapter->napi); 1951 int frames_processed = 0; 1952 1953 restart_poll: 1954 while (frames_processed < budget) { 1955 struct sk_buff *skb; 1956 struct ibmvnic_rx_buff *rx_buff; 1957 union sub_crq *next; 1958 u32 length; 1959 u16 offset; 1960 u8 flags = 0; 1961 1962 if (unlikely(adapter->resetting && 1963 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 1964 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1965 napi_complete_done(napi, frames_processed); 1966 return frames_processed; 1967 } 1968 1969 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 1970 break; 1971 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 1972 rx_buff = 1973 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 1974 rx_comp.correlator); 1975 /* do error checking */ 1976 if (next->rx_comp.rc) { 1977 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 1978 be16_to_cpu(next->rx_comp.rc)); 1979 /* free the entry */ 1980 next->rx_comp.first = 0; 1981 dev_kfree_skb_any(rx_buff->skb); 1982 remove_buff_from_pool(adapter, rx_buff); 1983 continue; 1984 } else if (!rx_buff->skb) { 1985 /* free the entry */ 1986 next->rx_comp.first = 0; 1987 remove_buff_from_pool(adapter, rx_buff); 1988 continue; 1989 } 1990 1991 length = be32_to_cpu(next->rx_comp.len); 1992 offset = be16_to_cpu(next->rx_comp.off_frame_data); 1993 flags = next->rx_comp.flags; 1994 skb = rx_buff->skb; 1995 skb_copy_to_linear_data(skb, rx_buff->data + offset, 1996 length); 1997 1998 /* VLAN Header has been stripped by the system firmware and 1999 * needs to be inserted by the driver 2000 */ 2001 if (adapter->rx_vlan_header_insertion && 2002 (flags & IBMVNIC_VLAN_STRIPPED)) 2003 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2004 ntohs(next->rx_comp.vlan_tci)); 2005 2006 /* free the entry */ 2007 next->rx_comp.first = 0; 2008 remove_buff_from_pool(adapter, rx_buff); 2009 2010 skb_put(skb, length); 2011 skb->protocol = eth_type_trans(skb, netdev); 2012 skb_record_rx_queue(skb, scrq_num); 2013 2014 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2015 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2016 skb->ip_summed = CHECKSUM_UNNECESSARY; 2017 } 2018 2019 length = skb->len; 2020 napi_gro_receive(napi, skb); /* send it up */ 2021 netdev->stats.rx_packets++; 2022 netdev->stats.rx_bytes += length; 2023 adapter->rx_stats_buffers[scrq_num].packets++; 2024 adapter->rx_stats_buffers[scrq_num].bytes += length; 2025 frames_processed++; 2026 } 2027 2028 if (adapter->state != VNIC_CLOSING) 2029 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2030 2031 if (frames_processed < budget) { 2032 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2033 napi_complete_done(napi, frames_processed); 2034 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2035 napi_reschedule(napi)) { 2036 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2037 goto restart_poll; 2038 } 2039 } 2040 return frames_processed; 2041 } 2042 2043 #ifdef CONFIG_NET_POLL_CONTROLLER 2044 static void ibmvnic_netpoll_controller(struct net_device *dev) 2045 { 2046 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2047 int i; 2048 2049 replenish_pools(netdev_priv(dev)); 2050 for (i = 0; i < adapter->req_rx_queues; i++) 2051 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 2052 adapter->rx_scrq[i]); 2053 } 2054 #endif 2055 2056 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2057 { 2058 adapter->fallback.mtu = adapter->req_mtu; 2059 adapter->fallback.rx_queues = adapter->req_rx_queues; 2060 adapter->fallback.tx_queues = adapter->req_tx_queues; 2061 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2062 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2063 2064 init_completion(&adapter->reset_done); 2065 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2066 adapter->wait_for_reset = true; 2067 wait_for_completion(&adapter->reset_done); 2068 2069 if (adapter->reset_done_rc) { 2070 adapter->desired.mtu = adapter->fallback.mtu; 2071 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2072 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2073 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2074 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2075 2076 init_completion(&adapter->reset_done); 2077 ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2078 wait_for_completion(&adapter->reset_done); 2079 } 2080 adapter->wait_for_reset = false; 2081 2082 return adapter->reset_done_rc; 2083 } 2084 2085 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2086 { 2087 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2088 2089 adapter->desired.mtu = new_mtu + ETH_HLEN; 2090 2091 return wait_for_reset(adapter); 2092 } 2093 2094 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2095 struct net_device *dev, 2096 netdev_features_t features) 2097 { 2098 /* Some backing hardware adapters can not 2099 * handle packets with a MSS less than 224 2100 * or with only one segment. 2101 */ 2102 if (skb_is_gso(skb)) { 2103 if (skb_shinfo(skb)->gso_size < 224 || 2104 skb_shinfo(skb)->gso_segs == 1) 2105 features &= ~NETIF_F_GSO_MASK; 2106 } 2107 2108 return features; 2109 } 2110 2111 static const struct net_device_ops ibmvnic_netdev_ops = { 2112 .ndo_open = ibmvnic_open, 2113 .ndo_stop = ibmvnic_close, 2114 .ndo_start_xmit = ibmvnic_xmit, 2115 .ndo_set_rx_mode = ibmvnic_set_multi, 2116 .ndo_set_mac_address = ibmvnic_set_mac, 2117 .ndo_validate_addr = eth_validate_addr, 2118 .ndo_tx_timeout = ibmvnic_tx_timeout, 2119 #ifdef CONFIG_NET_POLL_CONTROLLER 2120 .ndo_poll_controller = ibmvnic_netpoll_controller, 2121 #endif 2122 .ndo_change_mtu = ibmvnic_change_mtu, 2123 .ndo_features_check = ibmvnic_features_check, 2124 }; 2125 2126 /* ethtool functions */ 2127 2128 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2129 struct ethtool_link_ksettings *cmd) 2130 { 2131 u32 supported, advertising; 2132 2133 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 2134 SUPPORTED_FIBRE); 2135 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 2136 ADVERTISED_FIBRE); 2137 cmd->base.speed = SPEED_1000; 2138 cmd->base.duplex = DUPLEX_FULL; 2139 cmd->base.port = PORT_FIBRE; 2140 cmd->base.phy_address = 0; 2141 cmd->base.autoneg = AUTONEG_ENABLE; 2142 2143 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 2144 supported); 2145 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 2146 advertising); 2147 2148 return 0; 2149 } 2150 2151 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2152 struct ethtool_drvinfo *info) 2153 { 2154 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2155 2156 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2157 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2158 strlcpy(info->fw_version, adapter->fw_version, 2159 sizeof(info->fw_version)); 2160 } 2161 2162 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2163 { 2164 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2165 2166 return adapter->msg_enable; 2167 } 2168 2169 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2170 { 2171 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2172 2173 adapter->msg_enable = data; 2174 } 2175 2176 static u32 ibmvnic_get_link(struct net_device *netdev) 2177 { 2178 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2179 2180 /* Don't need to send a query because we request a logical link up at 2181 * init and then we wait for link state indications 2182 */ 2183 return adapter->logical_link_state; 2184 } 2185 2186 static void ibmvnic_get_ringparam(struct net_device *netdev, 2187 struct ethtool_ringparam *ring) 2188 { 2189 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2190 2191 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2192 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2193 ring->rx_mini_max_pending = 0; 2194 ring->rx_jumbo_max_pending = 0; 2195 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2196 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2197 ring->rx_mini_pending = 0; 2198 ring->rx_jumbo_pending = 0; 2199 } 2200 2201 static int ibmvnic_set_ringparam(struct net_device *netdev, 2202 struct ethtool_ringparam *ring) 2203 { 2204 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2205 2206 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 2207 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 2208 netdev_err(netdev, "Invalid request.\n"); 2209 netdev_err(netdev, "Max tx buffers = %llu\n", 2210 adapter->max_rx_add_entries_per_subcrq); 2211 netdev_err(netdev, "Max rx buffers = %llu\n", 2212 adapter->max_tx_entries_per_subcrq); 2213 return -EINVAL; 2214 } 2215 2216 adapter->desired.rx_entries = ring->rx_pending; 2217 adapter->desired.tx_entries = ring->tx_pending; 2218 2219 return wait_for_reset(adapter); 2220 } 2221 2222 static void ibmvnic_get_channels(struct net_device *netdev, 2223 struct ethtool_channels *channels) 2224 { 2225 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2226 2227 channels->max_rx = adapter->max_rx_queues; 2228 channels->max_tx = adapter->max_tx_queues; 2229 channels->max_other = 0; 2230 channels->max_combined = 0; 2231 channels->rx_count = adapter->req_rx_queues; 2232 channels->tx_count = adapter->req_tx_queues; 2233 channels->other_count = 0; 2234 channels->combined_count = 0; 2235 } 2236 2237 static int ibmvnic_set_channels(struct net_device *netdev, 2238 struct ethtool_channels *channels) 2239 { 2240 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2241 2242 adapter->desired.rx_queues = channels->rx_count; 2243 adapter->desired.tx_queues = channels->tx_count; 2244 2245 return wait_for_reset(adapter); 2246 } 2247 2248 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2249 { 2250 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2251 int i; 2252 2253 if (stringset != ETH_SS_STATS) 2254 return; 2255 2256 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 2257 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2258 2259 for (i = 0; i < adapter->req_tx_queues; i++) { 2260 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2261 data += ETH_GSTRING_LEN; 2262 2263 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2264 data += ETH_GSTRING_LEN; 2265 2266 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); 2267 data += ETH_GSTRING_LEN; 2268 } 2269 2270 for (i = 0; i < adapter->req_rx_queues; i++) { 2271 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2272 data += ETH_GSTRING_LEN; 2273 2274 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2275 data += ETH_GSTRING_LEN; 2276 2277 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2278 data += ETH_GSTRING_LEN; 2279 } 2280 } 2281 2282 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2283 { 2284 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2285 2286 switch (sset) { 2287 case ETH_SS_STATS: 2288 return ARRAY_SIZE(ibmvnic_stats) + 2289 adapter->req_tx_queues * NUM_TX_STATS + 2290 adapter->req_rx_queues * NUM_RX_STATS; 2291 default: 2292 return -EOPNOTSUPP; 2293 } 2294 } 2295 2296 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2297 struct ethtool_stats *stats, u64 *data) 2298 { 2299 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2300 union ibmvnic_crq crq; 2301 int i, j; 2302 2303 memset(&crq, 0, sizeof(crq)); 2304 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2305 crq.request_statistics.cmd = REQUEST_STATISTICS; 2306 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2307 crq.request_statistics.len = 2308 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2309 2310 /* Wait for data to be written */ 2311 init_completion(&adapter->stats_done); 2312 ibmvnic_send_crq(adapter, &crq); 2313 wait_for_completion(&adapter->stats_done); 2314 2315 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2316 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2317 ibmvnic_stats[i].offset)); 2318 2319 for (j = 0; j < adapter->req_tx_queues; j++) { 2320 data[i] = adapter->tx_stats_buffers[j].packets; 2321 i++; 2322 data[i] = adapter->tx_stats_buffers[j].bytes; 2323 i++; 2324 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2325 i++; 2326 } 2327 2328 for (j = 0; j < adapter->req_rx_queues; j++) { 2329 data[i] = adapter->rx_stats_buffers[j].packets; 2330 i++; 2331 data[i] = adapter->rx_stats_buffers[j].bytes; 2332 i++; 2333 data[i] = adapter->rx_stats_buffers[j].interrupts; 2334 i++; 2335 } 2336 } 2337 2338 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2339 .get_drvinfo = ibmvnic_get_drvinfo, 2340 .get_msglevel = ibmvnic_get_msglevel, 2341 .set_msglevel = ibmvnic_set_msglevel, 2342 .get_link = ibmvnic_get_link, 2343 .get_ringparam = ibmvnic_get_ringparam, 2344 .set_ringparam = ibmvnic_set_ringparam, 2345 .get_channels = ibmvnic_get_channels, 2346 .set_channels = ibmvnic_set_channels, 2347 .get_strings = ibmvnic_get_strings, 2348 .get_sset_count = ibmvnic_get_sset_count, 2349 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2350 .get_link_ksettings = ibmvnic_get_link_ksettings, 2351 }; 2352 2353 /* Routines for managing CRQs/sCRQs */ 2354 2355 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2356 struct ibmvnic_sub_crq_queue *scrq) 2357 { 2358 int rc; 2359 2360 if (scrq->irq) { 2361 free_irq(scrq->irq, scrq); 2362 irq_dispose_mapping(scrq->irq); 2363 scrq->irq = 0; 2364 } 2365 2366 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2367 scrq->cur = 0; 2368 2369 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2370 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2371 return rc; 2372 } 2373 2374 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2375 { 2376 int i, rc; 2377 2378 for (i = 0; i < adapter->req_tx_queues; i++) { 2379 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2380 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2381 if (rc) 2382 return rc; 2383 } 2384 2385 for (i = 0; i < adapter->req_rx_queues; i++) { 2386 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2387 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2388 if (rc) 2389 return rc; 2390 } 2391 2392 return rc; 2393 } 2394 2395 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2396 struct ibmvnic_sub_crq_queue *scrq, 2397 bool do_h_free) 2398 { 2399 struct device *dev = &adapter->vdev->dev; 2400 long rc; 2401 2402 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2403 2404 if (do_h_free) { 2405 /* Close the sub-crqs */ 2406 do { 2407 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2408 adapter->vdev->unit_address, 2409 scrq->crq_num); 2410 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2411 2412 if (rc) { 2413 netdev_err(adapter->netdev, 2414 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2415 scrq->crq_num, rc); 2416 } 2417 } 2418 2419 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2420 DMA_BIDIRECTIONAL); 2421 free_pages((unsigned long)scrq->msgs, 2); 2422 kfree(scrq); 2423 } 2424 2425 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2426 *adapter) 2427 { 2428 struct device *dev = &adapter->vdev->dev; 2429 struct ibmvnic_sub_crq_queue *scrq; 2430 int rc; 2431 2432 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2433 if (!scrq) 2434 return NULL; 2435 2436 scrq->msgs = 2437 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2438 if (!scrq->msgs) { 2439 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2440 goto zero_page_failed; 2441 } 2442 2443 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2444 DMA_BIDIRECTIONAL); 2445 if (dma_mapping_error(dev, scrq->msg_token)) { 2446 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2447 goto map_failed; 2448 } 2449 2450 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2451 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2452 2453 if (rc == H_RESOURCE) 2454 rc = ibmvnic_reset_crq(adapter); 2455 2456 if (rc == H_CLOSED) { 2457 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2458 } else if (rc) { 2459 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2460 goto reg_failed; 2461 } 2462 2463 scrq->adapter = adapter; 2464 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2465 spin_lock_init(&scrq->lock); 2466 2467 netdev_dbg(adapter->netdev, 2468 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2469 scrq->crq_num, scrq->hw_irq, scrq->irq); 2470 2471 return scrq; 2472 2473 reg_failed: 2474 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2475 DMA_BIDIRECTIONAL); 2476 map_failed: 2477 free_pages((unsigned long)scrq->msgs, 2); 2478 zero_page_failed: 2479 kfree(scrq); 2480 2481 return NULL; 2482 } 2483 2484 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2485 { 2486 int i; 2487 2488 if (adapter->tx_scrq) { 2489 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2490 if (!adapter->tx_scrq[i]) 2491 continue; 2492 2493 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2494 i); 2495 if (adapter->tx_scrq[i]->irq) { 2496 free_irq(adapter->tx_scrq[i]->irq, 2497 adapter->tx_scrq[i]); 2498 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2499 adapter->tx_scrq[i]->irq = 0; 2500 } 2501 2502 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2503 do_h_free); 2504 } 2505 2506 kfree(adapter->tx_scrq); 2507 adapter->tx_scrq = NULL; 2508 adapter->num_active_tx_scrqs = 0; 2509 } 2510 2511 if (adapter->rx_scrq) { 2512 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2513 if (!adapter->rx_scrq[i]) 2514 continue; 2515 2516 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2517 i); 2518 if (adapter->rx_scrq[i]->irq) { 2519 free_irq(adapter->rx_scrq[i]->irq, 2520 adapter->rx_scrq[i]); 2521 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2522 adapter->rx_scrq[i]->irq = 0; 2523 } 2524 2525 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2526 do_h_free); 2527 } 2528 2529 kfree(adapter->rx_scrq); 2530 adapter->rx_scrq = NULL; 2531 adapter->num_active_rx_scrqs = 0; 2532 } 2533 } 2534 2535 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2536 struct ibmvnic_sub_crq_queue *scrq) 2537 { 2538 struct device *dev = &adapter->vdev->dev; 2539 unsigned long rc; 2540 2541 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2542 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2543 if (rc) 2544 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2545 scrq->hw_irq, rc); 2546 return rc; 2547 } 2548 2549 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2550 struct ibmvnic_sub_crq_queue *scrq) 2551 { 2552 struct device *dev = &adapter->vdev->dev; 2553 unsigned long rc; 2554 2555 if (scrq->hw_irq > 0x100000000ULL) { 2556 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2557 return 1; 2558 } 2559 2560 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2561 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2562 if (rc) 2563 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2564 scrq->hw_irq, rc); 2565 return rc; 2566 } 2567 2568 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2569 struct ibmvnic_sub_crq_queue *scrq) 2570 { 2571 struct device *dev = &adapter->vdev->dev; 2572 struct ibmvnic_tx_pool *tx_pool; 2573 struct ibmvnic_tx_buff *txbuff; 2574 union sub_crq *next; 2575 int index; 2576 int i, j; 2577 u8 first; 2578 2579 restart_loop: 2580 while (pending_scrq(adapter, scrq)) { 2581 unsigned int pool = scrq->pool_index; 2582 int num_entries = 0; 2583 2584 next = ibmvnic_next_scrq(adapter, scrq); 2585 for (i = 0; i < next->tx_comp.num_comps; i++) { 2586 if (next->tx_comp.rcs[i]) { 2587 dev_err(dev, "tx error %x\n", 2588 next->tx_comp.rcs[i]); 2589 continue; 2590 } 2591 index = be32_to_cpu(next->tx_comp.correlators[i]); 2592 if (index & IBMVNIC_TSO_POOL_MASK) { 2593 tx_pool = &adapter->tso_pool[pool]; 2594 index &= ~IBMVNIC_TSO_POOL_MASK; 2595 } else { 2596 tx_pool = &adapter->tx_pool[pool]; 2597 } 2598 2599 txbuff = &tx_pool->tx_buff[index]; 2600 2601 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2602 if (!txbuff->data_dma[j]) 2603 continue; 2604 2605 txbuff->data_dma[j] = 0; 2606 } 2607 /* if sub_crq was sent indirectly */ 2608 first = txbuff->indir_arr[0].generic.first; 2609 if (first == IBMVNIC_CRQ_CMD) { 2610 dma_unmap_single(dev, txbuff->indir_dma, 2611 sizeof(txbuff->indir_arr), 2612 DMA_TO_DEVICE); 2613 } 2614 2615 if (txbuff->last_frag) { 2616 dev_kfree_skb_any(txbuff->skb); 2617 txbuff->skb = NULL; 2618 } 2619 2620 num_entries += txbuff->num_entries; 2621 2622 tx_pool->free_map[tx_pool->producer_index] = index; 2623 tx_pool->producer_index = 2624 (tx_pool->producer_index + 1) % 2625 tx_pool->num_buffers; 2626 } 2627 /* remove tx_comp scrq*/ 2628 next->tx_comp.first = 0; 2629 2630 if (atomic_sub_return(num_entries, &scrq->used) <= 2631 (adapter->req_tx_entries_per_subcrq / 2) && 2632 __netif_subqueue_stopped(adapter->netdev, 2633 scrq->pool_index)) { 2634 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2635 netdev_dbg(adapter->netdev, "Started queue %d\n", 2636 scrq->pool_index); 2637 } 2638 } 2639 2640 enable_scrq_irq(adapter, scrq); 2641 2642 if (pending_scrq(adapter, scrq)) { 2643 disable_scrq_irq(adapter, scrq); 2644 goto restart_loop; 2645 } 2646 2647 return 0; 2648 } 2649 2650 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2651 { 2652 struct ibmvnic_sub_crq_queue *scrq = instance; 2653 struct ibmvnic_adapter *adapter = scrq->adapter; 2654 2655 disable_scrq_irq(adapter, scrq); 2656 ibmvnic_complete_tx(adapter, scrq); 2657 2658 return IRQ_HANDLED; 2659 } 2660 2661 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2662 { 2663 struct ibmvnic_sub_crq_queue *scrq = instance; 2664 struct ibmvnic_adapter *adapter = scrq->adapter; 2665 2666 /* When booting a kdump kernel we can hit pending interrupts 2667 * prior to completing driver initialization. 2668 */ 2669 if (unlikely(adapter->state != VNIC_OPEN)) 2670 return IRQ_NONE; 2671 2672 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2673 2674 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2675 disable_scrq_irq(adapter, scrq); 2676 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2677 } 2678 2679 return IRQ_HANDLED; 2680 } 2681 2682 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2683 { 2684 struct device *dev = &adapter->vdev->dev; 2685 struct ibmvnic_sub_crq_queue *scrq; 2686 int i = 0, j = 0; 2687 int rc = 0; 2688 2689 for (i = 0; i < adapter->req_tx_queues; i++) { 2690 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2691 i); 2692 scrq = adapter->tx_scrq[i]; 2693 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2694 2695 if (!scrq->irq) { 2696 rc = -EINVAL; 2697 dev_err(dev, "Error mapping irq\n"); 2698 goto req_tx_irq_failed; 2699 } 2700 2701 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2702 0, "ibmvnic_tx", scrq); 2703 2704 if (rc) { 2705 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2706 scrq->irq, rc); 2707 irq_dispose_mapping(scrq->irq); 2708 goto req_tx_irq_failed; 2709 } 2710 } 2711 2712 for (i = 0; i < adapter->req_rx_queues; i++) { 2713 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2714 i); 2715 scrq = adapter->rx_scrq[i]; 2716 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2717 if (!scrq->irq) { 2718 rc = -EINVAL; 2719 dev_err(dev, "Error mapping irq\n"); 2720 goto req_rx_irq_failed; 2721 } 2722 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2723 0, "ibmvnic_rx", scrq); 2724 if (rc) { 2725 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2726 scrq->irq, rc); 2727 irq_dispose_mapping(scrq->irq); 2728 goto req_rx_irq_failed; 2729 } 2730 } 2731 return rc; 2732 2733 req_rx_irq_failed: 2734 for (j = 0; j < i; j++) { 2735 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2736 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2737 } 2738 i = adapter->req_tx_queues; 2739 req_tx_irq_failed: 2740 for (j = 0; j < i; j++) { 2741 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2742 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2743 } 2744 release_sub_crqs(adapter, 1); 2745 return rc; 2746 } 2747 2748 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2749 { 2750 struct device *dev = &adapter->vdev->dev; 2751 struct ibmvnic_sub_crq_queue **allqueues; 2752 int registered_queues = 0; 2753 int total_queues; 2754 int more = 0; 2755 int i; 2756 2757 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2758 2759 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2760 if (!allqueues) 2761 return -1; 2762 2763 for (i = 0; i < total_queues; i++) { 2764 allqueues[i] = init_sub_crq_queue(adapter); 2765 if (!allqueues[i]) { 2766 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2767 break; 2768 } 2769 registered_queues++; 2770 } 2771 2772 /* Make sure we were able to register the minimum number of queues */ 2773 if (registered_queues < 2774 adapter->min_tx_queues + adapter->min_rx_queues) { 2775 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 2776 goto tx_failed; 2777 } 2778 2779 /* Distribute the failed allocated queues*/ 2780 for (i = 0; i < total_queues - registered_queues + more ; i++) { 2781 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 2782 switch (i % 3) { 2783 case 0: 2784 if (adapter->req_rx_queues > adapter->min_rx_queues) 2785 adapter->req_rx_queues--; 2786 else 2787 more++; 2788 break; 2789 case 1: 2790 if (adapter->req_tx_queues > adapter->min_tx_queues) 2791 adapter->req_tx_queues--; 2792 else 2793 more++; 2794 break; 2795 } 2796 } 2797 2798 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 2799 sizeof(*adapter->tx_scrq), GFP_KERNEL); 2800 if (!adapter->tx_scrq) 2801 goto tx_failed; 2802 2803 for (i = 0; i < adapter->req_tx_queues; i++) { 2804 adapter->tx_scrq[i] = allqueues[i]; 2805 adapter->tx_scrq[i]->pool_index = i; 2806 adapter->num_active_tx_scrqs++; 2807 } 2808 2809 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 2810 sizeof(*adapter->rx_scrq), GFP_KERNEL); 2811 if (!adapter->rx_scrq) 2812 goto rx_failed; 2813 2814 for (i = 0; i < adapter->req_rx_queues; i++) { 2815 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 2816 adapter->rx_scrq[i]->scrq_num = i; 2817 adapter->num_active_rx_scrqs++; 2818 } 2819 2820 kfree(allqueues); 2821 return 0; 2822 2823 rx_failed: 2824 kfree(adapter->tx_scrq); 2825 adapter->tx_scrq = NULL; 2826 tx_failed: 2827 for (i = 0; i < registered_queues; i++) 2828 release_sub_crq_queue(adapter, allqueues[i], 1); 2829 kfree(allqueues); 2830 return -1; 2831 } 2832 2833 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 2834 { 2835 struct device *dev = &adapter->vdev->dev; 2836 union ibmvnic_crq crq; 2837 int max_entries; 2838 2839 if (!retry) { 2840 /* Sub-CRQ entries are 32 byte long */ 2841 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 2842 2843 if (adapter->min_tx_entries_per_subcrq > entries_page || 2844 adapter->min_rx_add_entries_per_subcrq > entries_page) { 2845 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 2846 return; 2847 } 2848 2849 if (adapter->desired.mtu) 2850 adapter->req_mtu = adapter->desired.mtu; 2851 else 2852 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 2853 2854 if (!adapter->desired.tx_entries) 2855 adapter->desired.tx_entries = 2856 adapter->max_tx_entries_per_subcrq; 2857 if (!adapter->desired.rx_entries) 2858 adapter->desired.rx_entries = 2859 adapter->max_rx_add_entries_per_subcrq; 2860 2861 max_entries = IBMVNIC_MAX_LTB_SIZE / 2862 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 2863 2864 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 2865 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 2866 adapter->desired.tx_entries = max_entries; 2867 } 2868 2869 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 2870 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 2871 adapter->desired.rx_entries = max_entries; 2872 } 2873 2874 if (adapter->desired.tx_entries) 2875 adapter->req_tx_entries_per_subcrq = 2876 adapter->desired.tx_entries; 2877 else 2878 adapter->req_tx_entries_per_subcrq = 2879 adapter->max_tx_entries_per_subcrq; 2880 2881 if (adapter->desired.rx_entries) 2882 adapter->req_rx_add_entries_per_subcrq = 2883 adapter->desired.rx_entries; 2884 else 2885 adapter->req_rx_add_entries_per_subcrq = 2886 adapter->max_rx_add_entries_per_subcrq; 2887 2888 if (adapter->desired.tx_queues) 2889 adapter->req_tx_queues = 2890 adapter->desired.tx_queues; 2891 else 2892 adapter->req_tx_queues = 2893 adapter->opt_tx_comp_sub_queues; 2894 2895 if (adapter->desired.rx_queues) 2896 adapter->req_rx_queues = 2897 adapter->desired.rx_queues; 2898 else 2899 adapter->req_rx_queues = 2900 adapter->opt_rx_comp_queues; 2901 2902 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 2903 } 2904 2905 memset(&crq, 0, sizeof(crq)); 2906 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2907 crq.request_capability.cmd = REQUEST_CAPABILITY; 2908 2909 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 2910 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 2911 atomic_inc(&adapter->running_cap_crqs); 2912 ibmvnic_send_crq(adapter, &crq); 2913 2914 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 2915 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 2916 atomic_inc(&adapter->running_cap_crqs); 2917 ibmvnic_send_crq(adapter, &crq); 2918 2919 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 2920 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 2921 atomic_inc(&adapter->running_cap_crqs); 2922 ibmvnic_send_crq(adapter, &crq); 2923 2924 crq.request_capability.capability = 2925 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 2926 crq.request_capability.number = 2927 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 2928 atomic_inc(&adapter->running_cap_crqs); 2929 ibmvnic_send_crq(adapter, &crq); 2930 2931 crq.request_capability.capability = 2932 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 2933 crq.request_capability.number = 2934 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 2935 atomic_inc(&adapter->running_cap_crqs); 2936 ibmvnic_send_crq(adapter, &crq); 2937 2938 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 2939 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 2940 atomic_inc(&adapter->running_cap_crqs); 2941 ibmvnic_send_crq(adapter, &crq); 2942 2943 if (adapter->netdev->flags & IFF_PROMISC) { 2944 if (adapter->promisc_supported) { 2945 crq.request_capability.capability = 2946 cpu_to_be16(PROMISC_REQUESTED); 2947 crq.request_capability.number = cpu_to_be64(1); 2948 atomic_inc(&adapter->running_cap_crqs); 2949 ibmvnic_send_crq(adapter, &crq); 2950 } 2951 } else { 2952 crq.request_capability.capability = 2953 cpu_to_be16(PROMISC_REQUESTED); 2954 crq.request_capability.number = cpu_to_be64(0); 2955 atomic_inc(&adapter->running_cap_crqs); 2956 ibmvnic_send_crq(adapter, &crq); 2957 } 2958 } 2959 2960 static int pending_scrq(struct ibmvnic_adapter *adapter, 2961 struct ibmvnic_sub_crq_queue *scrq) 2962 { 2963 union sub_crq *entry = &scrq->msgs[scrq->cur]; 2964 2965 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 2966 return 1; 2967 else 2968 return 0; 2969 } 2970 2971 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 2972 struct ibmvnic_sub_crq_queue *scrq) 2973 { 2974 union sub_crq *entry; 2975 unsigned long flags; 2976 2977 spin_lock_irqsave(&scrq->lock, flags); 2978 entry = &scrq->msgs[scrq->cur]; 2979 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2980 if (++scrq->cur == scrq->size) 2981 scrq->cur = 0; 2982 } else { 2983 entry = NULL; 2984 } 2985 spin_unlock_irqrestore(&scrq->lock, flags); 2986 2987 return entry; 2988 } 2989 2990 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 2991 { 2992 struct ibmvnic_crq_queue *queue = &adapter->crq; 2993 union ibmvnic_crq *crq; 2994 2995 crq = &queue->msgs[queue->cur]; 2996 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2997 if (++queue->cur == queue->size) 2998 queue->cur = 0; 2999 } else { 3000 crq = NULL; 3001 } 3002 3003 return crq; 3004 } 3005 3006 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3007 union sub_crq *sub_crq) 3008 { 3009 unsigned int ua = adapter->vdev->unit_address; 3010 struct device *dev = &adapter->vdev->dev; 3011 u64 *u64_crq = (u64 *)sub_crq; 3012 int rc; 3013 3014 netdev_dbg(adapter->netdev, 3015 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3016 (unsigned long int)cpu_to_be64(remote_handle), 3017 (unsigned long int)cpu_to_be64(u64_crq[0]), 3018 (unsigned long int)cpu_to_be64(u64_crq[1]), 3019 (unsigned long int)cpu_to_be64(u64_crq[2]), 3020 (unsigned long int)cpu_to_be64(u64_crq[3])); 3021 3022 /* Make sure the hypervisor sees the complete request */ 3023 mb(); 3024 3025 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3026 cpu_to_be64(remote_handle), 3027 cpu_to_be64(u64_crq[0]), 3028 cpu_to_be64(u64_crq[1]), 3029 cpu_to_be64(u64_crq[2]), 3030 cpu_to_be64(u64_crq[3])); 3031 3032 if (rc) { 3033 if (rc == H_CLOSED) 3034 dev_warn(dev, "CRQ Queue closed\n"); 3035 dev_err(dev, "Send error (rc=%d)\n", rc); 3036 } 3037 3038 return rc; 3039 } 3040 3041 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3042 u64 remote_handle, u64 ioba, u64 num_entries) 3043 { 3044 unsigned int ua = adapter->vdev->unit_address; 3045 struct device *dev = &adapter->vdev->dev; 3046 int rc; 3047 3048 /* Make sure the hypervisor sees the complete request */ 3049 mb(); 3050 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3051 cpu_to_be64(remote_handle), 3052 ioba, num_entries); 3053 3054 if (rc) { 3055 if (rc == H_CLOSED) 3056 dev_warn(dev, "CRQ Queue closed\n"); 3057 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 3058 } 3059 3060 return rc; 3061 } 3062 3063 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3064 union ibmvnic_crq *crq) 3065 { 3066 unsigned int ua = adapter->vdev->unit_address; 3067 struct device *dev = &adapter->vdev->dev; 3068 u64 *u64_crq = (u64 *)crq; 3069 int rc; 3070 3071 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3072 (unsigned long int)cpu_to_be64(u64_crq[0]), 3073 (unsigned long int)cpu_to_be64(u64_crq[1])); 3074 3075 /* Make sure the hypervisor sees the complete request */ 3076 mb(); 3077 3078 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3079 cpu_to_be64(u64_crq[0]), 3080 cpu_to_be64(u64_crq[1])); 3081 3082 if (rc) { 3083 if (rc == H_CLOSED) { 3084 dev_warn(dev, "CRQ Queue closed\n"); 3085 if (adapter->resetting) 3086 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3087 } 3088 3089 dev_warn(dev, "Send error (rc=%d)\n", rc); 3090 } 3091 3092 return rc; 3093 } 3094 3095 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3096 { 3097 union ibmvnic_crq crq; 3098 3099 memset(&crq, 0, sizeof(crq)); 3100 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3101 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3102 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3103 3104 return ibmvnic_send_crq(adapter, &crq); 3105 } 3106 3107 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3108 { 3109 union ibmvnic_crq crq; 3110 3111 memset(&crq, 0, sizeof(crq)); 3112 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3113 crq.version_exchange.cmd = VERSION_EXCHANGE; 3114 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3115 3116 return ibmvnic_send_crq(adapter, &crq); 3117 } 3118 3119 struct vnic_login_client_data { 3120 u8 type; 3121 __be16 len; 3122 char name; 3123 } __packed; 3124 3125 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3126 { 3127 int len; 3128 3129 /* Calculate the amount of buffer space needed for the 3130 * vnic client data in the login buffer. There are four entries, 3131 * OS name, LPAR name, device name, and a null last entry. 3132 */ 3133 len = 4 * sizeof(struct vnic_login_client_data); 3134 len += 6; /* "Linux" plus NULL */ 3135 len += strlen(utsname()->nodename) + 1; 3136 len += strlen(adapter->netdev->name) + 1; 3137 3138 return len; 3139 } 3140 3141 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3142 struct vnic_login_client_data *vlcd) 3143 { 3144 const char *os_name = "Linux"; 3145 int len; 3146 3147 /* Type 1 - LPAR OS */ 3148 vlcd->type = 1; 3149 len = strlen(os_name) + 1; 3150 vlcd->len = cpu_to_be16(len); 3151 strncpy(&vlcd->name, os_name, len); 3152 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len); 3153 3154 /* Type 2 - LPAR name */ 3155 vlcd->type = 2; 3156 len = strlen(utsname()->nodename) + 1; 3157 vlcd->len = cpu_to_be16(len); 3158 strncpy(&vlcd->name, utsname()->nodename, len); 3159 vlcd = (struct vnic_login_client_data *)((char *)&vlcd->name + len); 3160 3161 /* Type 3 - device name */ 3162 vlcd->type = 3; 3163 len = strlen(adapter->netdev->name) + 1; 3164 vlcd->len = cpu_to_be16(len); 3165 strncpy(&vlcd->name, adapter->netdev->name, len); 3166 } 3167 3168 static int send_login(struct ibmvnic_adapter *adapter) 3169 { 3170 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3171 struct ibmvnic_login_buffer *login_buffer; 3172 struct device *dev = &adapter->vdev->dev; 3173 dma_addr_t rsp_buffer_token; 3174 dma_addr_t buffer_token; 3175 size_t rsp_buffer_size; 3176 union ibmvnic_crq crq; 3177 size_t buffer_size; 3178 __be64 *tx_list_p; 3179 __be64 *rx_list_p; 3180 int client_data_len; 3181 struct vnic_login_client_data *vlcd; 3182 int i; 3183 3184 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3185 netdev_err(adapter->netdev, 3186 "RX or TX queues are not allocated, device login failed\n"); 3187 return -1; 3188 } 3189 3190 release_login_rsp_buffer(adapter); 3191 client_data_len = vnic_client_data_len(adapter); 3192 3193 buffer_size = 3194 sizeof(struct ibmvnic_login_buffer) + 3195 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3196 client_data_len; 3197 3198 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3199 if (!login_buffer) 3200 goto buf_alloc_failed; 3201 3202 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3203 DMA_TO_DEVICE); 3204 if (dma_mapping_error(dev, buffer_token)) { 3205 dev_err(dev, "Couldn't map login buffer\n"); 3206 goto buf_map_failed; 3207 } 3208 3209 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3210 sizeof(u64) * adapter->req_tx_queues + 3211 sizeof(u64) * adapter->req_rx_queues + 3212 sizeof(u64) * adapter->req_rx_queues + 3213 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3214 3215 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3216 if (!login_rsp_buffer) 3217 goto buf_rsp_alloc_failed; 3218 3219 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3220 rsp_buffer_size, DMA_FROM_DEVICE); 3221 if (dma_mapping_error(dev, rsp_buffer_token)) { 3222 dev_err(dev, "Couldn't map login rsp buffer\n"); 3223 goto buf_rsp_map_failed; 3224 } 3225 3226 adapter->login_buf = login_buffer; 3227 adapter->login_buf_token = buffer_token; 3228 adapter->login_buf_sz = buffer_size; 3229 adapter->login_rsp_buf = login_rsp_buffer; 3230 adapter->login_rsp_buf_token = rsp_buffer_token; 3231 adapter->login_rsp_buf_sz = rsp_buffer_size; 3232 3233 login_buffer->len = cpu_to_be32(buffer_size); 3234 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3235 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3236 login_buffer->off_txcomp_subcrqs = 3237 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3238 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3239 login_buffer->off_rxcomp_subcrqs = 3240 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3241 sizeof(u64) * adapter->req_tx_queues); 3242 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3243 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3244 3245 tx_list_p = (__be64 *)((char *)login_buffer + 3246 sizeof(struct ibmvnic_login_buffer)); 3247 rx_list_p = (__be64 *)((char *)login_buffer + 3248 sizeof(struct ibmvnic_login_buffer) + 3249 sizeof(u64) * adapter->req_tx_queues); 3250 3251 for (i = 0; i < adapter->req_tx_queues; i++) { 3252 if (adapter->tx_scrq[i]) { 3253 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3254 crq_num); 3255 } 3256 } 3257 3258 for (i = 0; i < adapter->req_rx_queues; i++) { 3259 if (adapter->rx_scrq[i]) { 3260 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3261 crq_num); 3262 } 3263 } 3264 3265 /* Insert vNIC login client data */ 3266 vlcd = (struct vnic_login_client_data *) 3267 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3268 login_buffer->client_data_offset = 3269 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3270 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3271 3272 vnic_add_client_data(adapter, vlcd); 3273 3274 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3275 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3276 netdev_dbg(adapter->netdev, "%016lx\n", 3277 ((unsigned long int *)(adapter->login_buf))[i]); 3278 } 3279 3280 memset(&crq, 0, sizeof(crq)); 3281 crq.login.first = IBMVNIC_CRQ_CMD; 3282 crq.login.cmd = LOGIN; 3283 crq.login.ioba = cpu_to_be32(buffer_token); 3284 crq.login.len = cpu_to_be32(buffer_size); 3285 ibmvnic_send_crq(adapter, &crq); 3286 3287 return 0; 3288 3289 buf_rsp_map_failed: 3290 kfree(login_rsp_buffer); 3291 buf_rsp_alloc_failed: 3292 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3293 buf_map_failed: 3294 kfree(login_buffer); 3295 buf_alloc_failed: 3296 return -1; 3297 } 3298 3299 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3300 u32 len, u8 map_id) 3301 { 3302 union ibmvnic_crq crq; 3303 3304 memset(&crq, 0, sizeof(crq)); 3305 crq.request_map.first = IBMVNIC_CRQ_CMD; 3306 crq.request_map.cmd = REQUEST_MAP; 3307 crq.request_map.map_id = map_id; 3308 crq.request_map.ioba = cpu_to_be32(addr); 3309 crq.request_map.len = cpu_to_be32(len); 3310 ibmvnic_send_crq(adapter, &crq); 3311 } 3312 3313 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3314 { 3315 union ibmvnic_crq crq; 3316 3317 memset(&crq, 0, sizeof(crq)); 3318 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3319 crq.request_unmap.cmd = REQUEST_UNMAP; 3320 crq.request_unmap.map_id = map_id; 3321 ibmvnic_send_crq(adapter, &crq); 3322 } 3323 3324 static void send_map_query(struct ibmvnic_adapter *adapter) 3325 { 3326 union ibmvnic_crq crq; 3327 3328 memset(&crq, 0, sizeof(crq)); 3329 crq.query_map.first = IBMVNIC_CRQ_CMD; 3330 crq.query_map.cmd = QUERY_MAP; 3331 ibmvnic_send_crq(adapter, &crq); 3332 } 3333 3334 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3335 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3336 { 3337 union ibmvnic_crq crq; 3338 3339 atomic_set(&adapter->running_cap_crqs, 0); 3340 memset(&crq, 0, sizeof(crq)); 3341 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3342 crq.query_capability.cmd = QUERY_CAPABILITY; 3343 3344 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3345 atomic_inc(&adapter->running_cap_crqs); 3346 ibmvnic_send_crq(adapter, &crq); 3347 3348 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3349 atomic_inc(&adapter->running_cap_crqs); 3350 ibmvnic_send_crq(adapter, &crq); 3351 3352 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3353 atomic_inc(&adapter->running_cap_crqs); 3354 ibmvnic_send_crq(adapter, &crq); 3355 3356 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3357 atomic_inc(&adapter->running_cap_crqs); 3358 ibmvnic_send_crq(adapter, &crq); 3359 3360 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3361 atomic_inc(&adapter->running_cap_crqs); 3362 ibmvnic_send_crq(adapter, &crq); 3363 3364 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3365 atomic_inc(&adapter->running_cap_crqs); 3366 ibmvnic_send_crq(adapter, &crq); 3367 3368 crq.query_capability.capability = 3369 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3370 atomic_inc(&adapter->running_cap_crqs); 3371 ibmvnic_send_crq(adapter, &crq); 3372 3373 crq.query_capability.capability = 3374 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3375 atomic_inc(&adapter->running_cap_crqs); 3376 ibmvnic_send_crq(adapter, &crq); 3377 3378 crq.query_capability.capability = 3379 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3380 atomic_inc(&adapter->running_cap_crqs); 3381 ibmvnic_send_crq(adapter, &crq); 3382 3383 crq.query_capability.capability = 3384 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3385 atomic_inc(&adapter->running_cap_crqs); 3386 ibmvnic_send_crq(adapter, &crq); 3387 3388 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3389 atomic_inc(&adapter->running_cap_crqs); 3390 ibmvnic_send_crq(adapter, &crq); 3391 3392 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3393 atomic_inc(&adapter->running_cap_crqs); 3394 ibmvnic_send_crq(adapter, &crq); 3395 3396 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3397 atomic_inc(&adapter->running_cap_crqs); 3398 ibmvnic_send_crq(adapter, &crq); 3399 3400 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3401 atomic_inc(&adapter->running_cap_crqs); 3402 ibmvnic_send_crq(adapter, &crq); 3403 3404 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3405 atomic_inc(&adapter->running_cap_crqs); 3406 ibmvnic_send_crq(adapter, &crq); 3407 3408 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3409 atomic_inc(&adapter->running_cap_crqs); 3410 ibmvnic_send_crq(adapter, &crq); 3411 3412 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3413 atomic_inc(&adapter->running_cap_crqs); 3414 ibmvnic_send_crq(adapter, &crq); 3415 3416 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3417 atomic_inc(&adapter->running_cap_crqs); 3418 ibmvnic_send_crq(adapter, &crq); 3419 3420 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3421 atomic_inc(&adapter->running_cap_crqs); 3422 ibmvnic_send_crq(adapter, &crq); 3423 3424 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3425 atomic_inc(&adapter->running_cap_crqs); 3426 ibmvnic_send_crq(adapter, &crq); 3427 3428 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3429 atomic_inc(&adapter->running_cap_crqs); 3430 ibmvnic_send_crq(adapter, &crq); 3431 3432 crq.query_capability.capability = 3433 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3434 atomic_inc(&adapter->running_cap_crqs); 3435 ibmvnic_send_crq(adapter, &crq); 3436 3437 crq.query_capability.capability = 3438 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3439 atomic_inc(&adapter->running_cap_crqs); 3440 ibmvnic_send_crq(adapter, &crq); 3441 3442 crq.query_capability.capability = 3443 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3444 atomic_inc(&adapter->running_cap_crqs); 3445 ibmvnic_send_crq(adapter, &crq); 3446 3447 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3448 atomic_inc(&adapter->running_cap_crqs); 3449 ibmvnic_send_crq(adapter, &crq); 3450 } 3451 3452 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3453 struct ibmvnic_adapter *adapter) 3454 { 3455 struct device *dev = &adapter->vdev->dev; 3456 3457 if (crq->get_vpd_size_rsp.rc.code) { 3458 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3459 crq->get_vpd_size_rsp.rc.code); 3460 complete(&adapter->fw_done); 3461 return; 3462 } 3463 3464 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3465 complete(&adapter->fw_done); 3466 } 3467 3468 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3469 struct ibmvnic_adapter *adapter) 3470 { 3471 struct device *dev = &adapter->vdev->dev; 3472 unsigned char *substr = NULL; 3473 u8 fw_level_len = 0; 3474 3475 memset(adapter->fw_version, 0, 32); 3476 3477 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3478 DMA_FROM_DEVICE); 3479 3480 if (crq->get_vpd_rsp.rc.code) { 3481 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3482 crq->get_vpd_rsp.rc.code); 3483 goto complete; 3484 } 3485 3486 /* get the position of the firmware version info 3487 * located after the ASCII 'RM' substring in the buffer 3488 */ 3489 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3490 if (!substr) { 3491 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3492 goto complete; 3493 } 3494 3495 /* get length of firmware level ASCII substring */ 3496 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3497 fw_level_len = *(substr + 2); 3498 } else { 3499 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3500 goto complete; 3501 } 3502 3503 /* copy firmware version string from vpd into adapter */ 3504 if ((substr + 3 + fw_level_len) < 3505 (adapter->vpd->buff + adapter->vpd->len)) { 3506 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3507 } else { 3508 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3509 } 3510 3511 complete: 3512 if (adapter->fw_version[0] == '\0') 3513 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3514 complete(&adapter->fw_done); 3515 } 3516 3517 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3518 { 3519 struct device *dev = &adapter->vdev->dev; 3520 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3521 union ibmvnic_crq crq; 3522 int i; 3523 3524 dma_unmap_single(dev, adapter->ip_offload_tok, 3525 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3526 3527 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3528 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3529 netdev_dbg(adapter->netdev, "%016lx\n", 3530 ((unsigned long int *)(buf))[i]); 3531 3532 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3533 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3534 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3535 buf->tcp_ipv4_chksum); 3536 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3537 buf->tcp_ipv6_chksum); 3538 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3539 buf->udp_ipv4_chksum); 3540 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3541 buf->udp_ipv6_chksum); 3542 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3543 buf->large_tx_ipv4); 3544 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3545 buf->large_tx_ipv6); 3546 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3547 buf->large_rx_ipv4); 3548 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3549 buf->large_rx_ipv6); 3550 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3551 buf->max_ipv4_header_size); 3552 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3553 buf->max_ipv6_header_size); 3554 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3555 buf->max_tcp_header_size); 3556 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3557 buf->max_udp_header_size); 3558 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3559 buf->max_large_tx_size); 3560 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3561 buf->max_large_rx_size); 3562 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3563 buf->ipv6_extension_header); 3564 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3565 buf->tcp_pseudosum_req); 3566 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3567 buf->num_ipv6_ext_headers); 3568 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3569 buf->off_ipv6_ext_headers); 3570 3571 adapter->ip_offload_ctrl_tok = 3572 dma_map_single(dev, &adapter->ip_offload_ctrl, 3573 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3574 3575 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3576 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3577 return; 3578 } 3579 3580 adapter->ip_offload_ctrl.len = 3581 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3582 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3583 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3584 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3585 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3586 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3587 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3588 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3589 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3590 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3591 3592 /* large_rx disabled for now, additional features needed */ 3593 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3594 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3595 3596 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; 3597 3598 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3599 adapter->netdev->features |= NETIF_F_IP_CSUM; 3600 3601 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3602 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 3603 3604 if ((adapter->netdev->features & 3605 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3606 adapter->netdev->features |= NETIF_F_RXCSUM; 3607 3608 if (buf->large_tx_ipv4) 3609 adapter->netdev->features |= NETIF_F_TSO; 3610 if (buf->large_tx_ipv6) 3611 adapter->netdev->features |= NETIF_F_TSO6; 3612 3613 adapter->netdev->hw_features |= adapter->netdev->features; 3614 3615 memset(&crq, 0, sizeof(crq)); 3616 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3617 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3618 crq.control_ip_offload.len = 3619 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3620 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3621 ibmvnic_send_crq(adapter, &crq); 3622 } 3623 3624 static void handle_error_info_rsp(union ibmvnic_crq *crq, 3625 struct ibmvnic_adapter *adapter) 3626 { 3627 struct device *dev = &adapter->vdev->dev; 3628 struct ibmvnic_error_buff *error_buff, *tmp; 3629 unsigned long flags; 3630 bool found = false; 3631 int i; 3632 3633 if (!crq->request_error_rsp.rc.code) { 3634 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 3635 crq->request_error_rsp.rc.code); 3636 return; 3637 } 3638 3639 spin_lock_irqsave(&adapter->error_list_lock, flags); 3640 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 3641 if (error_buff->error_id == crq->request_error_rsp.error_id) { 3642 found = true; 3643 list_del(&error_buff->list); 3644 break; 3645 } 3646 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3647 3648 if (!found) { 3649 dev_err(dev, "Couldn't find error id %x\n", 3650 be32_to_cpu(crq->request_error_rsp.error_id)); 3651 return; 3652 } 3653 3654 dev_err(dev, "Detailed info for error id %x:", 3655 be32_to_cpu(crq->request_error_rsp.error_id)); 3656 3657 for (i = 0; i < error_buff->len; i++) { 3658 pr_cont("%02x", (int)error_buff->buff[i]); 3659 if (i % 8 == 7) 3660 pr_cont(" "); 3661 } 3662 pr_cont("\n"); 3663 3664 dma_unmap_single(dev, error_buff->dma, error_buff->len, 3665 DMA_FROM_DEVICE); 3666 kfree(error_buff->buff); 3667 kfree(error_buff); 3668 } 3669 3670 static void request_error_information(struct ibmvnic_adapter *adapter, 3671 union ibmvnic_crq *err_crq) 3672 { 3673 struct device *dev = &adapter->vdev->dev; 3674 struct net_device *netdev = adapter->netdev; 3675 struct ibmvnic_error_buff *error_buff; 3676 unsigned long timeout = msecs_to_jiffies(30000); 3677 union ibmvnic_crq crq; 3678 unsigned long flags; 3679 int rc, detail_len; 3680 3681 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 3682 if (!error_buff) 3683 return; 3684 3685 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz); 3686 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 3687 if (!error_buff->buff) { 3688 kfree(error_buff); 3689 return; 3690 } 3691 3692 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 3693 DMA_FROM_DEVICE); 3694 if (dma_mapping_error(dev, error_buff->dma)) { 3695 netdev_err(netdev, "Couldn't map error buffer\n"); 3696 kfree(error_buff->buff); 3697 kfree(error_buff); 3698 return; 3699 } 3700 3701 error_buff->len = detail_len; 3702 error_buff->error_id = err_crq->error_indication.error_id; 3703 3704 spin_lock_irqsave(&adapter->error_list_lock, flags); 3705 list_add_tail(&error_buff->list, &adapter->errors); 3706 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3707 3708 memset(&crq, 0, sizeof(crq)); 3709 crq.request_error_info.first = IBMVNIC_CRQ_CMD; 3710 crq.request_error_info.cmd = REQUEST_ERROR_INFO; 3711 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 3712 crq.request_error_info.len = cpu_to_be32(detail_len); 3713 crq.request_error_info.error_id = err_crq->error_indication.error_id; 3714 3715 rc = ibmvnic_send_crq(adapter, &crq); 3716 if (rc) { 3717 netdev_err(netdev, "failed to request error information\n"); 3718 goto err_info_fail; 3719 } 3720 3721 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3722 netdev_err(netdev, "timeout waiting for error information\n"); 3723 goto err_info_fail; 3724 } 3725 3726 return; 3727 3728 err_info_fail: 3729 spin_lock_irqsave(&adapter->error_list_lock, flags); 3730 list_del(&error_buff->list); 3731 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 3732 3733 kfree(error_buff->buff); 3734 kfree(error_buff); 3735 } 3736 3737 static void handle_error_indication(union ibmvnic_crq *crq, 3738 struct ibmvnic_adapter *adapter) 3739 { 3740 struct device *dev = &adapter->vdev->dev; 3741 3742 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 3743 crq->error_indication.flags 3744 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3745 be32_to_cpu(crq->error_indication.error_id), 3746 be16_to_cpu(crq->error_indication.error_cause)); 3747 3748 if (be32_to_cpu(crq->error_indication.error_id)) 3749 request_error_information(adapter, crq); 3750 3751 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3752 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3753 else 3754 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3755 } 3756 3757 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3758 struct ibmvnic_adapter *adapter) 3759 { 3760 struct net_device *netdev = adapter->netdev; 3761 struct device *dev = &adapter->vdev->dev; 3762 long rc; 3763 3764 rc = crq->change_mac_addr_rsp.rc.code; 3765 if (rc) { 3766 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3767 goto out; 3768 } 3769 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 3770 ETH_ALEN); 3771 out: 3772 complete(&adapter->fw_done); 3773 return rc; 3774 } 3775 3776 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3777 struct ibmvnic_adapter *adapter) 3778 { 3779 struct device *dev = &adapter->vdev->dev; 3780 u64 *req_value; 3781 char *name; 3782 3783 atomic_dec(&adapter->running_cap_crqs); 3784 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3785 case REQ_TX_QUEUES: 3786 req_value = &adapter->req_tx_queues; 3787 name = "tx"; 3788 break; 3789 case REQ_RX_QUEUES: 3790 req_value = &adapter->req_rx_queues; 3791 name = "rx"; 3792 break; 3793 case REQ_RX_ADD_QUEUES: 3794 req_value = &adapter->req_rx_add_queues; 3795 name = "rx_add"; 3796 break; 3797 case REQ_TX_ENTRIES_PER_SUBCRQ: 3798 req_value = &adapter->req_tx_entries_per_subcrq; 3799 name = "tx_entries_per_subcrq"; 3800 break; 3801 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3802 req_value = &adapter->req_rx_add_entries_per_subcrq; 3803 name = "rx_add_entries_per_subcrq"; 3804 break; 3805 case REQ_MTU: 3806 req_value = &adapter->req_mtu; 3807 name = "mtu"; 3808 break; 3809 case PROMISC_REQUESTED: 3810 req_value = &adapter->promisc; 3811 name = "promisc"; 3812 break; 3813 default: 3814 dev_err(dev, "Got invalid cap request rsp %d\n", 3815 crq->request_capability.capability); 3816 return; 3817 } 3818 3819 switch (crq->request_capability_rsp.rc.code) { 3820 case SUCCESS: 3821 break; 3822 case PARTIALSUCCESS: 3823 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3824 *req_value, 3825 (long int)be64_to_cpu(crq->request_capability_rsp. 3826 number), name); 3827 3828 if (be16_to_cpu(crq->request_capability_rsp.capability) == 3829 REQ_MTU) { 3830 pr_err("mtu of %llu is not supported. Reverting.\n", 3831 *req_value); 3832 *req_value = adapter->fallback.mtu; 3833 } else { 3834 *req_value = 3835 be64_to_cpu(crq->request_capability_rsp.number); 3836 } 3837 3838 ibmvnic_send_req_caps(adapter, 1); 3839 return; 3840 default: 3841 dev_err(dev, "Error %d in request cap rsp\n", 3842 crq->request_capability_rsp.rc.code); 3843 return; 3844 } 3845 3846 /* Done receiving requested capabilities, query IP offload support */ 3847 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3848 union ibmvnic_crq newcrq; 3849 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 3850 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 3851 &adapter->ip_offload_buf; 3852 3853 adapter->wait_capability = false; 3854 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 3855 buf_sz, 3856 DMA_FROM_DEVICE); 3857 3858 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 3859 if (!firmware_has_feature(FW_FEATURE_CMO)) 3860 dev_err(dev, "Couldn't map offload buffer\n"); 3861 return; 3862 } 3863 3864 memset(&newcrq, 0, sizeof(newcrq)); 3865 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 3866 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 3867 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 3868 newcrq.query_ip_offload.ioba = 3869 cpu_to_be32(adapter->ip_offload_tok); 3870 3871 ibmvnic_send_crq(adapter, &newcrq); 3872 } 3873 } 3874 3875 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 3876 struct ibmvnic_adapter *adapter) 3877 { 3878 struct device *dev = &adapter->vdev->dev; 3879 struct net_device *netdev = adapter->netdev; 3880 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 3881 struct ibmvnic_login_buffer *login = adapter->login_buf; 3882 int i; 3883 3884 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 3885 DMA_BIDIRECTIONAL); 3886 dma_unmap_single(dev, adapter->login_rsp_buf_token, 3887 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 3888 3889 /* If the number of queues requested can't be allocated by the 3890 * server, the login response will return with code 1. We will need 3891 * to resend the login buffer with fewer queues requested. 3892 */ 3893 if (login_rsp_crq->generic.rc.code) { 3894 adapter->renegotiate = true; 3895 complete(&adapter->init_done); 3896 return 0; 3897 } 3898 3899 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3900 3901 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 3902 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 3903 netdev_dbg(adapter->netdev, "%016lx\n", 3904 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 3905 } 3906 3907 /* Sanity checks */ 3908 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 3909 (be32_to_cpu(login->num_rxcomp_subcrqs) * 3910 adapter->req_rx_add_queues != 3911 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 3912 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 3913 ibmvnic_remove(adapter->vdev); 3914 return -EIO; 3915 } 3916 release_login_buffer(adapter); 3917 complete(&adapter->init_done); 3918 3919 return 0; 3920 } 3921 3922 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 3923 struct ibmvnic_adapter *adapter) 3924 { 3925 struct device *dev = &adapter->vdev->dev; 3926 long rc; 3927 3928 rc = crq->request_unmap_rsp.rc.code; 3929 if (rc) 3930 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 3931 } 3932 3933 static void handle_query_map_rsp(union ibmvnic_crq *crq, 3934 struct ibmvnic_adapter *adapter) 3935 { 3936 struct net_device *netdev = adapter->netdev; 3937 struct device *dev = &adapter->vdev->dev; 3938 long rc; 3939 3940 rc = crq->query_map_rsp.rc.code; 3941 if (rc) { 3942 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 3943 return; 3944 } 3945 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 3946 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 3947 crq->query_map_rsp.free_pages); 3948 } 3949 3950 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 3951 struct ibmvnic_adapter *adapter) 3952 { 3953 struct net_device *netdev = adapter->netdev; 3954 struct device *dev = &adapter->vdev->dev; 3955 long rc; 3956 3957 atomic_dec(&adapter->running_cap_crqs); 3958 netdev_dbg(netdev, "Outstanding queries: %d\n", 3959 atomic_read(&adapter->running_cap_crqs)); 3960 rc = crq->query_capability.rc.code; 3961 if (rc) { 3962 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 3963 goto out; 3964 } 3965 3966 switch (be16_to_cpu(crq->query_capability.capability)) { 3967 case MIN_TX_QUEUES: 3968 adapter->min_tx_queues = 3969 be64_to_cpu(crq->query_capability.number); 3970 netdev_dbg(netdev, "min_tx_queues = %lld\n", 3971 adapter->min_tx_queues); 3972 break; 3973 case MIN_RX_QUEUES: 3974 adapter->min_rx_queues = 3975 be64_to_cpu(crq->query_capability.number); 3976 netdev_dbg(netdev, "min_rx_queues = %lld\n", 3977 adapter->min_rx_queues); 3978 break; 3979 case MIN_RX_ADD_QUEUES: 3980 adapter->min_rx_add_queues = 3981 be64_to_cpu(crq->query_capability.number); 3982 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 3983 adapter->min_rx_add_queues); 3984 break; 3985 case MAX_TX_QUEUES: 3986 adapter->max_tx_queues = 3987 be64_to_cpu(crq->query_capability.number); 3988 netdev_dbg(netdev, "max_tx_queues = %lld\n", 3989 adapter->max_tx_queues); 3990 break; 3991 case MAX_RX_QUEUES: 3992 adapter->max_rx_queues = 3993 be64_to_cpu(crq->query_capability.number); 3994 netdev_dbg(netdev, "max_rx_queues = %lld\n", 3995 adapter->max_rx_queues); 3996 break; 3997 case MAX_RX_ADD_QUEUES: 3998 adapter->max_rx_add_queues = 3999 be64_to_cpu(crq->query_capability.number); 4000 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4001 adapter->max_rx_add_queues); 4002 break; 4003 case MIN_TX_ENTRIES_PER_SUBCRQ: 4004 adapter->min_tx_entries_per_subcrq = 4005 be64_to_cpu(crq->query_capability.number); 4006 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4007 adapter->min_tx_entries_per_subcrq); 4008 break; 4009 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4010 adapter->min_rx_add_entries_per_subcrq = 4011 be64_to_cpu(crq->query_capability.number); 4012 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4013 adapter->min_rx_add_entries_per_subcrq); 4014 break; 4015 case MAX_TX_ENTRIES_PER_SUBCRQ: 4016 adapter->max_tx_entries_per_subcrq = 4017 be64_to_cpu(crq->query_capability.number); 4018 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4019 adapter->max_tx_entries_per_subcrq); 4020 break; 4021 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4022 adapter->max_rx_add_entries_per_subcrq = 4023 be64_to_cpu(crq->query_capability.number); 4024 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4025 adapter->max_rx_add_entries_per_subcrq); 4026 break; 4027 case TCP_IP_OFFLOAD: 4028 adapter->tcp_ip_offload = 4029 be64_to_cpu(crq->query_capability.number); 4030 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4031 adapter->tcp_ip_offload); 4032 break; 4033 case PROMISC_SUPPORTED: 4034 adapter->promisc_supported = 4035 be64_to_cpu(crq->query_capability.number); 4036 netdev_dbg(netdev, "promisc_supported = %lld\n", 4037 adapter->promisc_supported); 4038 break; 4039 case MIN_MTU: 4040 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4041 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4042 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4043 break; 4044 case MAX_MTU: 4045 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4046 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4047 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4048 break; 4049 case MAX_MULTICAST_FILTERS: 4050 adapter->max_multicast_filters = 4051 be64_to_cpu(crq->query_capability.number); 4052 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4053 adapter->max_multicast_filters); 4054 break; 4055 case VLAN_HEADER_INSERTION: 4056 adapter->vlan_header_insertion = 4057 be64_to_cpu(crq->query_capability.number); 4058 if (adapter->vlan_header_insertion) 4059 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4060 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4061 adapter->vlan_header_insertion); 4062 break; 4063 case RX_VLAN_HEADER_INSERTION: 4064 adapter->rx_vlan_header_insertion = 4065 be64_to_cpu(crq->query_capability.number); 4066 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4067 adapter->rx_vlan_header_insertion); 4068 break; 4069 case MAX_TX_SG_ENTRIES: 4070 adapter->max_tx_sg_entries = 4071 be64_to_cpu(crq->query_capability.number); 4072 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4073 adapter->max_tx_sg_entries); 4074 break; 4075 case RX_SG_SUPPORTED: 4076 adapter->rx_sg_supported = 4077 be64_to_cpu(crq->query_capability.number); 4078 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4079 adapter->rx_sg_supported); 4080 break; 4081 case OPT_TX_COMP_SUB_QUEUES: 4082 adapter->opt_tx_comp_sub_queues = 4083 be64_to_cpu(crq->query_capability.number); 4084 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4085 adapter->opt_tx_comp_sub_queues); 4086 break; 4087 case OPT_RX_COMP_QUEUES: 4088 adapter->opt_rx_comp_queues = 4089 be64_to_cpu(crq->query_capability.number); 4090 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4091 adapter->opt_rx_comp_queues); 4092 break; 4093 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4094 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4095 be64_to_cpu(crq->query_capability.number); 4096 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4097 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4098 break; 4099 case OPT_TX_ENTRIES_PER_SUBCRQ: 4100 adapter->opt_tx_entries_per_subcrq = 4101 be64_to_cpu(crq->query_capability.number); 4102 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4103 adapter->opt_tx_entries_per_subcrq); 4104 break; 4105 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4106 adapter->opt_rxba_entries_per_subcrq = 4107 be64_to_cpu(crq->query_capability.number); 4108 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4109 adapter->opt_rxba_entries_per_subcrq); 4110 break; 4111 case TX_RX_DESC_REQ: 4112 adapter->tx_rx_desc_req = crq->query_capability.number; 4113 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4114 adapter->tx_rx_desc_req); 4115 break; 4116 4117 default: 4118 netdev_err(netdev, "Got invalid cap rsp %d\n", 4119 crq->query_capability.capability); 4120 } 4121 4122 out: 4123 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4124 adapter->wait_capability = false; 4125 ibmvnic_send_req_caps(adapter, 0); 4126 } 4127 } 4128 4129 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4130 struct ibmvnic_adapter *adapter) 4131 { 4132 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4133 struct net_device *netdev = adapter->netdev; 4134 struct device *dev = &adapter->vdev->dev; 4135 u64 *u64_crq = (u64 *)crq; 4136 long rc; 4137 4138 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4139 (unsigned long int)cpu_to_be64(u64_crq[0]), 4140 (unsigned long int)cpu_to_be64(u64_crq[1])); 4141 switch (gen_crq->first) { 4142 case IBMVNIC_CRQ_INIT_RSP: 4143 switch (gen_crq->cmd) { 4144 case IBMVNIC_CRQ_INIT: 4145 dev_info(dev, "Partner initialized\n"); 4146 adapter->from_passive_init = true; 4147 complete(&adapter->init_done); 4148 break; 4149 case IBMVNIC_CRQ_INIT_COMPLETE: 4150 dev_info(dev, "Partner initialization complete\n"); 4151 send_version_xchg(adapter); 4152 break; 4153 default: 4154 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4155 } 4156 return; 4157 case IBMVNIC_CRQ_XPORT_EVENT: 4158 netif_carrier_off(netdev); 4159 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4160 dev_info(dev, "Migrated, re-enabling adapter\n"); 4161 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4162 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4163 dev_info(dev, "Backing device failover detected\n"); 4164 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4165 } else { 4166 /* The adapter lost the connection */ 4167 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4168 gen_crq->cmd); 4169 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4170 } 4171 return; 4172 case IBMVNIC_CRQ_CMD_RSP: 4173 break; 4174 default: 4175 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4176 gen_crq->first); 4177 return; 4178 } 4179 4180 switch (gen_crq->cmd) { 4181 case VERSION_EXCHANGE_RSP: 4182 rc = crq->version_exchange_rsp.rc.code; 4183 if (rc) { 4184 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4185 break; 4186 } 4187 dev_info(dev, "Partner protocol version is %d\n", 4188 crq->version_exchange_rsp.version); 4189 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4190 ibmvnic_version) 4191 ibmvnic_version = 4192 be16_to_cpu(crq->version_exchange_rsp.version); 4193 send_cap_queries(adapter); 4194 break; 4195 case QUERY_CAPABILITY_RSP: 4196 handle_query_cap_rsp(crq, adapter); 4197 break; 4198 case QUERY_MAP_RSP: 4199 handle_query_map_rsp(crq, adapter); 4200 break; 4201 case REQUEST_MAP_RSP: 4202 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4203 complete(&adapter->fw_done); 4204 break; 4205 case REQUEST_UNMAP_RSP: 4206 handle_request_unmap_rsp(crq, adapter); 4207 break; 4208 case REQUEST_CAPABILITY_RSP: 4209 handle_request_cap_rsp(crq, adapter); 4210 break; 4211 case LOGIN_RSP: 4212 netdev_dbg(netdev, "Got Login Response\n"); 4213 handle_login_rsp(crq, adapter); 4214 break; 4215 case LOGICAL_LINK_STATE_RSP: 4216 netdev_dbg(netdev, 4217 "Got Logical Link State Response, state: %d rc: %d\n", 4218 crq->logical_link_state_rsp.link_state, 4219 crq->logical_link_state_rsp.rc.code); 4220 adapter->logical_link_state = 4221 crq->logical_link_state_rsp.link_state; 4222 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4223 complete(&adapter->init_done); 4224 break; 4225 case LINK_STATE_INDICATION: 4226 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4227 adapter->phys_link_state = 4228 crq->link_state_indication.phys_link_state; 4229 adapter->logical_link_state = 4230 crq->link_state_indication.logical_link_state; 4231 break; 4232 case CHANGE_MAC_ADDR_RSP: 4233 netdev_dbg(netdev, "Got MAC address change Response\n"); 4234 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4235 break; 4236 case ERROR_INDICATION: 4237 netdev_dbg(netdev, "Got Error Indication\n"); 4238 handle_error_indication(crq, adapter); 4239 break; 4240 case REQUEST_ERROR_RSP: 4241 netdev_dbg(netdev, "Got Error Detail Response\n"); 4242 handle_error_info_rsp(crq, adapter); 4243 break; 4244 case REQUEST_STATISTICS_RSP: 4245 netdev_dbg(netdev, "Got Statistics Response\n"); 4246 complete(&adapter->stats_done); 4247 break; 4248 case QUERY_IP_OFFLOAD_RSP: 4249 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4250 handle_query_ip_offload_rsp(adapter); 4251 break; 4252 case MULTICAST_CTRL_RSP: 4253 netdev_dbg(netdev, "Got multicast control Response\n"); 4254 break; 4255 case CONTROL_IP_OFFLOAD_RSP: 4256 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4257 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4258 sizeof(adapter->ip_offload_ctrl), 4259 DMA_TO_DEVICE); 4260 complete(&adapter->init_done); 4261 break; 4262 case COLLECT_FW_TRACE_RSP: 4263 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4264 complete(&adapter->fw_done); 4265 break; 4266 case GET_VPD_SIZE_RSP: 4267 handle_vpd_size_rsp(crq, adapter); 4268 break; 4269 case GET_VPD_RSP: 4270 handle_vpd_rsp(crq, adapter); 4271 break; 4272 default: 4273 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4274 gen_crq->cmd); 4275 } 4276 } 4277 4278 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4279 { 4280 struct ibmvnic_adapter *adapter = instance; 4281 4282 tasklet_schedule(&adapter->tasklet); 4283 return IRQ_HANDLED; 4284 } 4285 4286 static void ibmvnic_tasklet(void *data) 4287 { 4288 struct ibmvnic_adapter *adapter = data; 4289 struct ibmvnic_crq_queue *queue = &adapter->crq; 4290 union ibmvnic_crq *crq; 4291 unsigned long flags; 4292 bool done = false; 4293 4294 spin_lock_irqsave(&queue->lock, flags); 4295 while (!done) { 4296 /* Pull all the valid messages off the CRQ */ 4297 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4298 ibmvnic_handle_crq(crq, adapter); 4299 crq->generic.first = 0; 4300 } 4301 4302 /* remain in tasklet until all 4303 * capabilities responses are received 4304 */ 4305 if (!adapter->wait_capability) 4306 done = true; 4307 } 4308 /* if capabilities CRQ's were sent in this tasklet, the following 4309 * tasklet must wait until all responses are received 4310 */ 4311 if (atomic_read(&adapter->running_cap_crqs) != 0) 4312 adapter->wait_capability = true; 4313 spin_unlock_irqrestore(&queue->lock, flags); 4314 } 4315 4316 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4317 { 4318 struct vio_dev *vdev = adapter->vdev; 4319 int rc; 4320 4321 do { 4322 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4323 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4324 4325 if (rc) 4326 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4327 4328 return rc; 4329 } 4330 4331 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4332 { 4333 struct ibmvnic_crq_queue *crq = &adapter->crq; 4334 struct device *dev = &adapter->vdev->dev; 4335 struct vio_dev *vdev = adapter->vdev; 4336 int rc; 4337 4338 /* Close the CRQ */ 4339 do { 4340 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4341 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4342 4343 /* Clean out the queue */ 4344 memset(crq->msgs, 0, PAGE_SIZE); 4345 crq->cur = 0; 4346 4347 /* And re-open it again */ 4348 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4349 crq->msg_token, PAGE_SIZE); 4350 4351 if (rc == H_CLOSED) 4352 /* Adapter is good, but other end is not ready */ 4353 dev_warn(dev, "Partner adapter not ready\n"); 4354 else if (rc != 0) 4355 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4356 4357 return rc; 4358 } 4359 4360 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4361 { 4362 struct ibmvnic_crq_queue *crq = &adapter->crq; 4363 struct vio_dev *vdev = adapter->vdev; 4364 long rc; 4365 4366 if (!crq->msgs) 4367 return; 4368 4369 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4370 free_irq(vdev->irq, adapter); 4371 tasklet_kill(&adapter->tasklet); 4372 do { 4373 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4374 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4375 4376 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4377 DMA_BIDIRECTIONAL); 4378 free_page((unsigned long)crq->msgs); 4379 crq->msgs = NULL; 4380 } 4381 4382 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4383 { 4384 struct ibmvnic_crq_queue *crq = &adapter->crq; 4385 struct device *dev = &adapter->vdev->dev; 4386 struct vio_dev *vdev = adapter->vdev; 4387 int rc, retrc = -ENOMEM; 4388 4389 if (crq->msgs) 4390 return 0; 4391 4392 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4393 /* Should we allocate more than one page? */ 4394 4395 if (!crq->msgs) 4396 return -ENOMEM; 4397 4398 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4399 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4400 DMA_BIDIRECTIONAL); 4401 if (dma_mapping_error(dev, crq->msg_token)) 4402 goto map_failed; 4403 4404 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4405 crq->msg_token, PAGE_SIZE); 4406 4407 if (rc == H_RESOURCE) 4408 /* maybe kexecing and resource is busy. try a reset */ 4409 rc = ibmvnic_reset_crq(adapter); 4410 retrc = rc; 4411 4412 if (rc == H_CLOSED) { 4413 dev_warn(dev, "Partner adapter not ready\n"); 4414 } else if (rc) { 4415 dev_warn(dev, "Error %d opening adapter\n", rc); 4416 goto reg_crq_failed; 4417 } 4418 4419 retrc = 0; 4420 4421 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4422 (unsigned long)adapter); 4423 4424 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4425 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 4426 adapter); 4427 if (rc) { 4428 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4429 vdev->irq, rc); 4430 goto req_irq_failed; 4431 } 4432 4433 rc = vio_enable_interrupts(vdev); 4434 if (rc) { 4435 dev_err(dev, "Error %d enabling interrupts\n", rc); 4436 goto req_irq_failed; 4437 } 4438 4439 crq->cur = 0; 4440 spin_lock_init(&crq->lock); 4441 4442 return retrc; 4443 4444 req_irq_failed: 4445 tasklet_kill(&adapter->tasklet); 4446 do { 4447 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4448 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4449 reg_crq_failed: 4450 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4451 map_failed: 4452 free_page((unsigned long)crq->msgs); 4453 crq->msgs = NULL; 4454 return retrc; 4455 } 4456 4457 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4458 { 4459 struct device *dev = &adapter->vdev->dev; 4460 unsigned long timeout = msecs_to_jiffies(30000); 4461 u64 old_num_rx_queues, old_num_tx_queues; 4462 int rc; 4463 4464 if (adapter->resetting && !adapter->wait_for_reset) { 4465 rc = ibmvnic_reset_crq(adapter); 4466 if (!rc) 4467 rc = vio_enable_interrupts(adapter->vdev); 4468 } else { 4469 rc = init_crq_queue(adapter); 4470 } 4471 4472 if (rc) { 4473 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 4474 return rc; 4475 } 4476 4477 adapter->from_passive_init = false; 4478 4479 old_num_rx_queues = adapter->req_rx_queues; 4480 old_num_tx_queues = adapter->req_tx_queues; 4481 4482 init_completion(&adapter->init_done); 4483 adapter->init_done_rc = 0; 4484 ibmvnic_send_crq_init(adapter); 4485 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4486 dev_err(dev, "Initialization sequence timed out\n"); 4487 return -1; 4488 } 4489 4490 if (adapter->init_done_rc) { 4491 release_crq_queue(adapter); 4492 return adapter->init_done_rc; 4493 } 4494 4495 if (adapter->from_passive_init) { 4496 adapter->state = VNIC_OPEN; 4497 adapter->from_passive_init = false; 4498 return -1; 4499 } 4500 4501 if (adapter->resetting && !adapter->wait_for_reset) { 4502 if (adapter->req_rx_queues != old_num_rx_queues || 4503 adapter->req_tx_queues != old_num_tx_queues) { 4504 release_sub_crqs(adapter, 0); 4505 rc = init_sub_crqs(adapter); 4506 } else { 4507 rc = reset_sub_crq_queues(adapter); 4508 } 4509 } else { 4510 rc = init_sub_crqs(adapter); 4511 } 4512 4513 if (rc) { 4514 dev_err(dev, "Initialization of sub crqs failed\n"); 4515 release_crq_queue(adapter); 4516 return rc; 4517 } 4518 4519 rc = init_sub_crq_irqs(adapter); 4520 if (rc) { 4521 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4522 release_crq_queue(adapter); 4523 } 4524 4525 rc = init_stats_buffers(adapter); 4526 if (rc) 4527 return rc; 4528 4529 rc = init_stats_token(adapter); 4530 if (rc) 4531 return rc; 4532 4533 return rc; 4534 } 4535 4536 static struct device_attribute dev_attr_failover; 4537 4538 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4539 { 4540 struct ibmvnic_adapter *adapter; 4541 struct net_device *netdev; 4542 unsigned char *mac_addr_p; 4543 int rc; 4544 4545 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4546 dev->unit_address); 4547 4548 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4549 VETH_MAC_ADDR, NULL); 4550 if (!mac_addr_p) { 4551 dev_err(&dev->dev, 4552 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4553 __FILE__, __LINE__); 4554 return 0; 4555 } 4556 4557 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4558 IBMVNIC_MAX_QUEUES); 4559 if (!netdev) 4560 return -ENOMEM; 4561 4562 adapter = netdev_priv(netdev); 4563 adapter->state = VNIC_PROBING; 4564 dev_set_drvdata(&dev->dev, netdev); 4565 adapter->vdev = dev; 4566 adapter->netdev = netdev; 4567 4568 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4569 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4570 netdev->irq = dev->irq; 4571 netdev->netdev_ops = &ibmvnic_netdev_ops; 4572 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4573 SET_NETDEV_DEV(netdev, &dev->dev); 4574 4575 spin_lock_init(&adapter->stats_lock); 4576 4577 INIT_LIST_HEAD(&adapter->errors); 4578 spin_lock_init(&adapter->error_list_lock); 4579 4580 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4581 INIT_LIST_HEAD(&adapter->rwi_list); 4582 mutex_init(&adapter->reset_lock); 4583 mutex_init(&adapter->rwi_lock); 4584 adapter->resetting = false; 4585 4586 adapter->mac_change_pending = false; 4587 4588 do { 4589 rc = ibmvnic_init(adapter); 4590 if (rc && rc != EAGAIN) 4591 goto ibmvnic_init_fail; 4592 } while (rc == EAGAIN); 4593 4594 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4595 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4596 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4597 4598 rc = device_create_file(&dev->dev, &dev_attr_failover); 4599 if (rc) 4600 goto ibmvnic_init_fail; 4601 4602 netif_carrier_off(netdev); 4603 rc = register_netdev(netdev); 4604 if (rc) { 4605 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4606 goto ibmvnic_register_fail; 4607 } 4608 dev_info(&dev->dev, "ibmvnic registered\n"); 4609 4610 adapter->state = VNIC_PROBED; 4611 4612 adapter->wait_for_reset = false; 4613 4614 return 0; 4615 4616 ibmvnic_register_fail: 4617 device_remove_file(&dev->dev, &dev_attr_failover); 4618 4619 ibmvnic_init_fail: 4620 release_sub_crqs(adapter, 1); 4621 release_crq_queue(adapter); 4622 free_netdev(netdev); 4623 4624 return rc; 4625 } 4626 4627 static int ibmvnic_remove(struct vio_dev *dev) 4628 { 4629 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4630 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4631 4632 adapter->state = VNIC_REMOVING; 4633 unregister_netdev(netdev); 4634 mutex_lock(&adapter->reset_lock); 4635 4636 release_resources(adapter); 4637 release_sub_crqs(adapter, 1); 4638 release_crq_queue(adapter); 4639 4640 release_stats_token(adapter); 4641 release_stats_buffers(adapter); 4642 4643 adapter->state = VNIC_REMOVED; 4644 4645 mutex_unlock(&adapter->reset_lock); 4646 device_remove_file(&dev->dev, &dev_attr_failover); 4647 free_netdev(netdev); 4648 dev_set_drvdata(&dev->dev, NULL); 4649 4650 return 0; 4651 } 4652 4653 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4654 const char *buf, size_t count) 4655 { 4656 struct net_device *netdev = dev_get_drvdata(dev); 4657 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4658 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4659 __be64 session_token; 4660 long rc; 4661 4662 if (!sysfs_streq(buf, "1")) 4663 return -EINVAL; 4664 4665 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4666 H_GET_SESSION_TOKEN, 0, 0, 0); 4667 if (rc) { 4668 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4669 rc); 4670 return -EINVAL; 4671 } 4672 4673 session_token = (__be64)retbuf[0]; 4674 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4675 be64_to_cpu(session_token)); 4676 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4677 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4678 if (rc) { 4679 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4680 rc); 4681 return -EINVAL; 4682 } 4683 4684 return count; 4685 } 4686 4687 static DEVICE_ATTR_WO(failover); 4688 4689 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4690 { 4691 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4692 struct ibmvnic_adapter *adapter; 4693 struct iommu_table *tbl; 4694 unsigned long ret = 0; 4695 int i; 4696 4697 tbl = get_iommu_table_base(&vdev->dev); 4698 4699 /* netdev inits at probe time along with the structures we need below*/ 4700 if (!netdev) 4701 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4702 4703 adapter = netdev_priv(netdev); 4704 4705 ret += PAGE_SIZE; /* the crq message queue */ 4706 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4707 4708 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4709 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4710 4711 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4712 i++) 4713 ret += adapter->rx_pool[i].size * 4714 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4715 4716 return ret; 4717 } 4718 4719 static int ibmvnic_resume(struct device *dev) 4720 { 4721 struct net_device *netdev = dev_get_drvdata(dev); 4722 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4723 4724 if (adapter->state != VNIC_OPEN) 4725 return 0; 4726 4727 tasklet_schedule(&adapter->tasklet); 4728 4729 return 0; 4730 } 4731 4732 static const struct vio_device_id ibmvnic_device_table[] = { 4733 {"network", "IBM,vnic"}, 4734 {"", "" } 4735 }; 4736 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 4737 4738 static const struct dev_pm_ops ibmvnic_pm_ops = { 4739 .resume = ibmvnic_resume 4740 }; 4741 4742 static struct vio_driver ibmvnic_driver = { 4743 .id_table = ibmvnic_device_table, 4744 .probe = ibmvnic_probe, 4745 .remove = ibmvnic_remove, 4746 .get_desired_dma = ibmvnic_get_desired_dma, 4747 .name = ibmvnic_driver_name, 4748 .pm = &ibmvnic_pm_ops, 4749 }; 4750 4751 /* module functions */ 4752 static int __init ibmvnic_module_init(void) 4753 { 4754 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 4755 IBMVNIC_DRIVER_VERSION); 4756 4757 return vio_register_driver(&ibmvnic_driver); 4758 } 4759 4760 static void __exit ibmvnic_module_exit(void) 4761 { 4762 vio_unregister_driver(&ibmvnic_driver); 4763 } 4764 4765 module_init(ibmvnic_module_init); 4766 module_exit(ibmvnic_module_exit); 4767