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/in.h> 63 #include <linux/ip.h> 64 #include <linux/ipv6.h> 65 #include <linux/irq.h> 66 #include <linux/kthread.h> 67 #include <linux/seq_file.h> 68 #include <linux/interrupt.h> 69 #include <net/net_namespace.h> 70 #include <asm/hvcall.h> 71 #include <linux/atomic.h> 72 #include <asm/vio.h> 73 #include <asm/iommu.h> 74 #include <linux/uaccess.h> 75 #include <asm/firmware.h> 76 #include <linux/workqueue.h> 77 #include <linux/if_vlan.h> 78 79 #include "ibmvnic.h" 80 81 static const char ibmvnic_driver_name[] = "ibmvnic"; 82 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 83 84 MODULE_AUTHOR("Santiago Leon <santi_leon@yahoo.com>"); 85 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 86 MODULE_LICENSE("GPL"); 87 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 88 89 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 90 static int ibmvnic_remove(struct vio_dev *); 91 static void release_sub_crqs(struct ibmvnic_adapter *); 92 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 93 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 94 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 95 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 96 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 97 union sub_crq *sub_crq); 98 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 99 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 100 static int enable_scrq_irq(struct ibmvnic_adapter *, 101 struct ibmvnic_sub_crq_queue *); 102 static int disable_scrq_irq(struct ibmvnic_adapter *, 103 struct ibmvnic_sub_crq_queue *); 104 static int pending_scrq(struct ibmvnic_adapter *, 105 struct ibmvnic_sub_crq_queue *); 106 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 107 struct ibmvnic_sub_crq_queue *); 108 static int ibmvnic_poll(struct napi_struct *napi, int data); 109 static void send_map_query(struct ibmvnic_adapter *adapter); 110 static void send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 111 static void send_request_unmap(struct ibmvnic_adapter *, u8); 112 static void send_login(struct ibmvnic_adapter *adapter); 113 static void send_cap_queries(struct ibmvnic_adapter *adapter); 114 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 115 static int ibmvnic_init(struct ibmvnic_adapter *); 116 static void release_crq_queue(struct ibmvnic_adapter *); 117 118 struct ibmvnic_stat { 119 char name[ETH_GSTRING_LEN]; 120 int offset; 121 }; 122 123 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 124 offsetof(struct ibmvnic_statistics, stat)) 125 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 126 127 static const struct ibmvnic_stat ibmvnic_stats[] = { 128 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 129 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 130 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 131 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 132 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 133 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 134 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 135 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 136 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 137 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 138 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 139 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 140 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 141 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 142 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 143 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 144 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 145 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 146 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 147 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 148 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 149 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 150 }; 151 152 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 153 unsigned long length, unsigned long *number, 154 unsigned long *irq) 155 { 156 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 157 long rc; 158 159 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 160 *number = retbuf[0]; 161 *irq = retbuf[1]; 162 163 return rc; 164 } 165 166 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 167 struct ibmvnic_long_term_buff *ltb, int size) 168 { 169 struct device *dev = &adapter->vdev->dev; 170 171 ltb->size = size; 172 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 173 GFP_KERNEL); 174 175 if (!ltb->buff) { 176 dev_err(dev, "Couldn't alloc long term buffer\n"); 177 return -ENOMEM; 178 } 179 ltb->map_id = adapter->map_id; 180 adapter->map_id++; 181 182 init_completion(&adapter->fw_done); 183 send_request_map(adapter, ltb->addr, 184 ltb->size, ltb->map_id); 185 wait_for_completion(&adapter->fw_done); 186 return 0; 187 } 188 189 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 190 struct ibmvnic_long_term_buff *ltb) 191 { 192 struct device *dev = &adapter->vdev->dev; 193 194 if (!ltb->buff) 195 return; 196 197 if (!adapter->failover) 198 send_request_unmap(adapter, ltb->map_id); 199 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 200 } 201 202 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 203 struct ibmvnic_rx_pool *pool) 204 { 205 int count = pool->size - atomic_read(&pool->available); 206 struct device *dev = &adapter->vdev->dev; 207 int buffers_added = 0; 208 unsigned long lpar_rc; 209 union sub_crq sub_crq; 210 struct sk_buff *skb; 211 unsigned int offset; 212 dma_addr_t dma_addr; 213 unsigned char *dst; 214 u64 *handle_array; 215 int shift = 0; 216 int index; 217 int i; 218 219 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 220 be32_to_cpu(adapter->login_rsp_buf-> 221 off_rxadd_subcrqs)); 222 223 for (i = 0; i < count; ++i) { 224 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 225 if (!skb) { 226 dev_err(dev, "Couldn't replenish rx buff\n"); 227 adapter->replenish_no_mem++; 228 break; 229 } 230 231 index = pool->free_map[pool->next_free]; 232 233 if (pool->rx_buff[index].skb) 234 dev_err(dev, "Inconsistent free_map!\n"); 235 236 /* Copy the skb to the long term mapped DMA buffer */ 237 offset = index * pool->buff_size; 238 dst = pool->long_term_buff.buff + offset; 239 memset(dst, 0, pool->buff_size); 240 dma_addr = pool->long_term_buff.addr + offset; 241 pool->rx_buff[index].data = dst; 242 243 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 244 pool->rx_buff[index].dma = dma_addr; 245 pool->rx_buff[index].skb = skb; 246 pool->rx_buff[index].pool_index = pool->index; 247 pool->rx_buff[index].size = pool->buff_size; 248 249 memset(&sub_crq, 0, sizeof(sub_crq)); 250 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 251 sub_crq.rx_add.correlator = 252 cpu_to_be64((u64)&pool->rx_buff[index]); 253 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 254 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 255 256 /* The length field of the sCRQ is defined to be 24 bits so the 257 * buffer size needs to be left shifted by a byte before it is 258 * converted to big endian to prevent the last byte from being 259 * truncated. 260 */ 261 #ifdef __LITTLE_ENDIAN__ 262 shift = 8; 263 #endif 264 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 265 266 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 267 &sub_crq); 268 if (lpar_rc != H_SUCCESS) 269 goto failure; 270 271 buffers_added++; 272 adapter->replenish_add_buff_success++; 273 pool->next_free = (pool->next_free + 1) % pool->size; 274 } 275 atomic_add(buffers_added, &pool->available); 276 return; 277 278 failure: 279 dev_info(dev, "replenish pools failure\n"); 280 pool->free_map[pool->next_free] = index; 281 pool->rx_buff[index].skb = NULL; 282 if (!dma_mapping_error(dev, dma_addr)) 283 dma_unmap_single(dev, dma_addr, pool->buff_size, 284 DMA_FROM_DEVICE); 285 286 dev_kfree_skb_any(skb); 287 adapter->replenish_add_buff_failure++; 288 atomic_add(buffers_added, &pool->available); 289 } 290 291 static void replenish_pools(struct ibmvnic_adapter *adapter) 292 { 293 int i; 294 295 if (adapter->migrated) 296 return; 297 298 adapter->replenish_task_cycles++; 299 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 300 i++) { 301 if (adapter->rx_pool[i].active) 302 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 303 } 304 } 305 306 static void release_stats_token(struct ibmvnic_adapter *adapter) 307 { 308 struct device *dev = &adapter->vdev->dev; 309 310 if (!adapter->stats_token) 311 return; 312 313 dma_unmap_single(dev, adapter->stats_token, 314 sizeof(struct ibmvnic_statistics), 315 DMA_FROM_DEVICE); 316 adapter->stats_token = 0; 317 } 318 319 static int init_stats_token(struct ibmvnic_adapter *adapter) 320 { 321 struct device *dev = &adapter->vdev->dev; 322 dma_addr_t stok; 323 324 stok = dma_map_single(dev, &adapter->stats, 325 sizeof(struct ibmvnic_statistics), 326 DMA_FROM_DEVICE); 327 if (dma_mapping_error(dev, stok)) { 328 dev_err(dev, "Couldn't map stats buffer\n"); 329 return -1; 330 } 331 332 adapter->stats_token = stok; 333 return 0; 334 } 335 336 static void release_rx_pools(struct ibmvnic_adapter *adapter) 337 { 338 struct ibmvnic_rx_pool *rx_pool; 339 int rx_scrqs; 340 int i, j; 341 342 if (!adapter->rx_pool) 343 return; 344 345 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 346 for (i = 0; i < rx_scrqs; i++) { 347 rx_pool = &adapter->rx_pool[i]; 348 349 kfree(rx_pool->free_map); 350 free_long_term_buff(adapter, &rx_pool->long_term_buff); 351 352 if (!rx_pool->rx_buff) 353 continue; 354 355 for (j = 0; j < rx_pool->size; j++) { 356 if (rx_pool->rx_buff[j].skb) { 357 dev_kfree_skb_any(rx_pool->rx_buff[i].skb); 358 rx_pool->rx_buff[i].skb = NULL; 359 } 360 } 361 362 kfree(rx_pool->rx_buff); 363 } 364 365 kfree(adapter->rx_pool); 366 adapter->rx_pool = NULL; 367 } 368 369 static int init_rx_pools(struct net_device *netdev) 370 { 371 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 372 struct device *dev = &adapter->vdev->dev; 373 struct ibmvnic_rx_pool *rx_pool; 374 int rxadd_subcrqs; 375 u64 *size_array; 376 int i, j; 377 378 rxadd_subcrqs = 379 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 380 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 381 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 382 383 adapter->rx_pool = kcalloc(rxadd_subcrqs, 384 sizeof(struct ibmvnic_rx_pool), 385 GFP_KERNEL); 386 if (!adapter->rx_pool) { 387 dev_err(dev, "Failed to allocate rx pools\n"); 388 return -1; 389 } 390 391 for (i = 0; i < rxadd_subcrqs; i++) { 392 rx_pool = &adapter->rx_pool[i]; 393 394 netdev_dbg(adapter->netdev, 395 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n", 396 i, adapter->req_rx_add_entries_per_subcrq, 397 be64_to_cpu(size_array[i])); 398 399 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 400 rx_pool->index = i; 401 rx_pool->buff_size = be64_to_cpu(size_array[i]); 402 rx_pool->active = 1; 403 404 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 405 GFP_KERNEL); 406 if (!rx_pool->free_map) { 407 release_rx_pools(adapter); 408 return -1; 409 } 410 411 rx_pool->rx_buff = kcalloc(rx_pool->size, 412 sizeof(struct ibmvnic_rx_buff), 413 GFP_KERNEL); 414 if (!rx_pool->rx_buff) { 415 dev_err(dev, "Couldn't alloc rx buffers\n"); 416 release_rx_pools(adapter); 417 return -1; 418 } 419 420 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 421 rx_pool->size * rx_pool->buff_size)) { 422 release_rx_pools(adapter); 423 return -1; 424 } 425 426 for (j = 0; j < rx_pool->size; ++j) 427 rx_pool->free_map[j] = j; 428 429 atomic_set(&rx_pool->available, 0); 430 rx_pool->next_alloc = 0; 431 rx_pool->next_free = 0; 432 } 433 434 return 0; 435 } 436 437 static void release_tx_pools(struct ibmvnic_adapter *adapter) 438 { 439 struct ibmvnic_tx_pool *tx_pool; 440 int i, tx_scrqs; 441 442 if (!adapter->tx_pool) 443 return; 444 445 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 446 for (i = 0; i < tx_scrqs; i++) { 447 tx_pool = &adapter->tx_pool[i]; 448 kfree(tx_pool->tx_buff); 449 free_long_term_buff(adapter, &tx_pool->long_term_buff); 450 kfree(tx_pool->free_map); 451 } 452 453 kfree(adapter->tx_pool); 454 adapter->tx_pool = NULL; 455 } 456 457 static int init_tx_pools(struct net_device *netdev) 458 { 459 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 460 struct device *dev = &adapter->vdev->dev; 461 struct ibmvnic_tx_pool *tx_pool; 462 int tx_subcrqs; 463 int i, j; 464 465 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 466 adapter->tx_pool = kcalloc(tx_subcrqs, 467 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 468 if (!adapter->tx_pool) 469 return -1; 470 471 for (i = 0; i < tx_subcrqs; i++) { 472 tx_pool = &adapter->tx_pool[i]; 473 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq, 474 sizeof(struct ibmvnic_tx_buff), 475 GFP_KERNEL); 476 if (!tx_pool->tx_buff) { 477 dev_err(dev, "tx pool buffer allocation failed\n"); 478 release_tx_pools(adapter); 479 return -1; 480 } 481 482 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 483 adapter->req_tx_entries_per_subcrq * 484 adapter->req_mtu)) { 485 release_tx_pools(adapter); 486 return -1; 487 } 488 489 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq, 490 sizeof(int), GFP_KERNEL); 491 if (!tx_pool->free_map) { 492 release_tx_pools(adapter); 493 return -1; 494 } 495 496 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 497 tx_pool->free_map[j] = j; 498 499 tx_pool->consumer_index = 0; 500 tx_pool->producer_index = 0; 501 } 502 503 return 0; 504 } 505 506 static void release_error_buffers(struct ibmvnic_adapter *adapter) 507 { 508 struct device *dev = &adapter->vdev->dev; 509 struct ibmvnic_error_buff *error_buff, *tmp; 510 unsigned long flags; 511 512 spin_lock_irqsave(&adapter->error_list_lock, flags); 513 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) { 514 list_del(&error_buff->list); 515 dma_unmap_single(dev, error_buff->dma, error_buff->len, 516 DMA_FROM_DEVICE); 517 kfree(error_buff->buff); 518 kfree(error_buff); 519 } 520 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 521 } 522 523 static int ibmvnic_login(struct net_device *netdev) 524 { 525 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 526 unsigned long timeout = msecs_to_jiffies(30000); 527 struct device *dev = &adapter->vdev->dev; 528 529 do { 530 if (adapter->renegotiate) { 531 adapter->renegotiate = false; 532 release_sub_crqs(adapter); 533 534 reinit_completion(&adapter->init_done); 535 send_cap_queries(adapter); 536 if (!wait_for_completion_timeout(&adapter->init_done, 537 timeout)) { 538 dev_err(dev, "Capabilities query timeout\n"); 539 return -1; 540 } 541 } 542 543 reinit_completion(&adapter->init_done); 544 send_login(adapter); 545 if (!wait_for_completion_timeout(&adapter->init_done, 546 timeout)) { 547 dev_err(dev, "Login timeout\n"); 548 return -1; 549 } 550 } while (adapter->renegotiate); 551 552 return 0; 553 } 554 555 static void release_resources(struct ibmvnic_adapter *adapter) 556 { 557 release_tx_pools(adapter); 558 release_rx_pools(adapter); 559 560 release_stats_token(adapter); 561 release_error_buffers(adapter); 562 } 563 564 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 565 { 566 struct net_device *netdev = adapter->netdev; 567 unsigned long timeout = msecs_to_jiffies(30000); 568 union ibmvnic_crq crq; 569 bool resend; 570 int rc; 571 572 if (adapter->logical_link_state == link_state) { 573 netdev_dbg(netdev, "Link state already %d\n", link_state); 574 return 0; 575 } 576 577 netdev_err(netdev, "setting link state %d\n", link_state); 578 memset(&crq, 0, sizeof(crq)); 579 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 580 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 581 crq.logical_link_state.link_state = link_state; 582 583 do { 584 resend = false; 585 586 reinit_completion(&adapter->init_done); 587 rc = ibmvnic_send_crq(adapter, &crq); 588 if (rc) { 589 netdev_err(netdev, "Failed to set link state\n"); 590 return rc; 591 } 592 593 if (!wait_for_completion_timeout(&adapter->init_done, 594 timeout)) { 595 netdev_err(netdev, "timeout setting link state\n"); 596 return -1; 597 } 598 599 if (adapter->init_done_rc == 1) { 600 /* Partuial success, delay and re-send */ 601 mdelay(1000); 602 resend = true; 603 } 604 } while (resend); 605 606 return 0; 607 } 608 609 static int set_real_num_queues(struct net_device *netdev) 610 { 611 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 612 int rc; 613 614 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 615 if (rc) { 616 netdev_err(netdev, "failed to set the number of tx queues\n"); 617 return rc; 618 } 619 620 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 621 if (rc) 622 netdev_err(netdev, "failed to set the number of rx queues\n"); 623 624 return rc; 625 } 626 627 static int ibmvnic_open(struct net_device *netdev) 628 { 629 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 630 struct device *dev = &adapter->vdev->dev; 631 int rc = 0; 632 int i; 633 634 if (adapter->is_closed) { 635 rc = ibmvnic_init(adapter); 636 if (rc) 637 return rc; 638 } 639 640 rc = ibmvnic_login(netdev); 641 if (rc) 642 return rc; 643 644 rc = set_real_num_queues(netdev); 645 if (rc) 646 return rc; 647 648 rc = init_sub_crq_irqs(adapter); 649 if (rc) { 650 dev_err(dev, "failed to initialize sub crq irqs\n"); 651 return -1; 652 } 653 654 rc = init_stats_token(adapter); 655 if (rc) 656 return rc; 657 658 adapter->map_id = 1; 659 adapter->napi = kcalloc(adapter->req_rx_queues, 660 sizeof(struct napi_struct), GFP_KERNEL); 661 if (!adapter->napi) 662 goto ibmvnic_open_fail; 663 for (i = 0; i < adapter->req_rx_queues; i++) { 664 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, 665 NAPI_POLL_WEIGHT); 666 napi_enable(&adapter->napi[i]); 667 } 668 669 send_map_query(adapter); 670 671 rc = init_rx_pools(netdev); 672 if (rc) 673 goto ibmvnic_open_fail; 674 675 rc = init_tx_pools(netdev); 676 if (rc) 677 goto ibmvnic_open_fail; 678 679 replenish_pools(adapter); 680 681 /* We're ready to receive frames, enable the sub-crq interrupts and 682 * set the logical link state to up 683 */ 684 for (i = 0; i < adapter->req_rx_queues; i++) 685 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 686 687 for (i = 0; i < adapter->req_tx_queues; i++) 688 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 689 690 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 691 if (rc) 692 goto ibmvnic_open_fail; 693 694 netif_tx_start_all_queues(netdev); 695 adapter->is_closed = false; 696 697 return 0; 698 699 ibmvnic_open_fail: 700 for (i = 0; i < adapter->req_rx_queues; i++) 701 napi_disable(&adapter->napi[i]); 702 release_resources(adapter); 703 return -ENOMEM; 704 } 705 706 static void disable_sub_crqs(struct ibmvnic_adapter *adapter) 707 { 708 int i; 709 710 if (adapter->tx_scrq) { 711 for (i = 0; i < adapter->req_tx_queues; i++) 712 if (adapter->tx_scrq[i]) 713 disable_irq(adapter->tx_scrq[i]->irq); 714 } 715 716 if (adapter->rx_scrq) { 717 for (i = 0; i < adapter->req_rx_queues; i++) 718 if (adapter->rx_scrq[i]) 719 disable_irq(adapter->rx_scrq[i]->irq); 720 } 721 } 722 723 static int ibmvnic_close(struct net_device *netdev) 724 { 725 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 726 int rc = 0; 727 int i; 728 729 adapter->closing = true; 730 disable_sub_crqs(adapter); 731 732 if (adapter->napi) { 733 for (i = 0; i < adapter->req_rx_queues; i++) 734 napi_disable(&adapter->napi[i]); 735 } 736 737 if (!adapter->failover) 738 netif_tx_stop_all_queues(netdev); 739 740 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 741 742 release_resources(adapter); 743 744 adapter->is_closed = true; 745 adapter->closing = false; 746 return rc; 747 } 748 749 /** 750 * build_hdr_data - creates L2/L3/L4 header data buffer 751 * @hdr_field - bitfield determining needed headers 752 * @skb - socket buffer 753 * @hdr_len - array of header lengths 754 * @tot_len - total length of data 755 * 756 * Reads hdr_field to determine which headers are needed by firmware. 757 * Builds a buffer containing these headers. Saves individual header 758 * lengths and total buffer length to be used to build descriptors. 759 */ 760 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 761 int *hdr_len, u8 *hdr_data) 762 { 763 int len = 0; 764 u8 *hdr; 765 766 hdr_len[0] = sizeof(struct ethhdr); 767 768 if (skb->protocol == htons(ETH_P_IP)) { 769 hdr_len[1] = ip_hdr(skb)->ihl * 4; 770 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 771 hdr_len[2] = tcp_hdrlen(skb); 772 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 773 hdr_len[2] = sizeof(struct udphdr); 774 } else if (skb->protocol == htons(ETH_P_IPV6)) { 775 hdr_len[1] = sizeof(struct ipv6hdr); 776 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 777 hdr_len[2] = tcp_hdrlen(skb); 778 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 779 hdr_len[2] = sizeof(struct udphdr); 780 } 781 782 memset(hdr_data, 0, 120); 783 if ((hdr_field >> 6) & 1) { 784 hdr = skb_mac_header(skb); 785 memcpy(hdr_data, hdr, hdr_len[0]); 786 len += hdr_len[0]; 787 } 788 789 if ((hdr_field >> 5) & 1) { 790 hdr = skb_network_header(skb); 791 memcpy(hdr_data + len, hdr, hdr_len[1]); 792 len += hdr_len[1]; 793 } 794 795 if ((hdr_field >> 4) & 1) { 796 hdr = skb_transport_header(skb); 797 memcpy(hdr_data + len, hdr, hdr_len[2]); 798 len += hdr_len[2]; 799 } 800 return len; 801 } 802 803 /** 804 * create_hdr_descs - create header and header extension descriptors 805 * @hdr_field - bitfield determining needed headers 806 * @data - buffer containing header data 807 * @len - length of data buffer 808 * @hdr_len - array of individual header lengths 809 * @scrq_arr - descriptor array 810 * 811 * Creates header and, if needed, header extension descriptors and 812 * places them in a descriptor array, scrq_arr 813 */ 814 815 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 816 union sub_crq *scrq_arr) 817 { 818 union sub_crq hdr_desc; 819 int tmp_len = len; 820 u8 *data, *cur; 821 int tmp; 822 823 while (tmp_len > 0) { 824 cur = hdr_data + len - tmp_len; 825 826 memset(&hdr_desc, 0, sizeof(hdr_desc)); 827 if (cur != hdr_data) { 828 data = hdr_desc.hdr_ext.data; 829 tmp = tmp_len > 29 ? 29 : tmp_len; 830 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 831 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 832 hdr_desc.hdr_ext.len = tmp; 833 } else { 834 data = hdr_desc.hdr.data; 835 tmp = tmp_len > 24 ? 24 : tmp_len; 836 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 837 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 838 hdr_desc.hdr.len = tmp; 839 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 840 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 841 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 842 hdr_desc.hdr.flag = hdr_field << 1; 843 } 844 memcpy(data, cur, tmp); 845 tmp_len -= tmp; 846 *scrq_arr = hdr_desc; 847 scrq_arr++; 848 } 849 } 850 851 /** 852 * build_hdr_descs_arr - build a header descriptor array 853 * @skb - socket buffer 854 * @num_entries - number of descriptors to be sent 855 * @subcrq - first TX descriptor 856 * @hdr_field - bit field determining which headers will be sent 857 * 858 * This function will build a TX descriptor array with applicable 859 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 860 */ 861 862 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 863 int *num_entries, u8 hdr_field) 864 { 865 int hdr_len[3] = {0, 0, 0}; 866 int tot_len, len; 867 u8 *hdr_data = txbuff->hdr_data; 868 869 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 870 txbuff->hdr_data); 871 len = tot_len; 872 len -= 24; 873 if (len > 0) 874 num_entries += len % 29 ? len / 29 + 1 : len / 29; 875 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 876 txbuff->indir_arr + 1); 877 } 878 879 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 880 { 881 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 882 int queue_num = skb_get_queue_mapping(skb); 883 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 884 struct device *dev = &adapter->vdev->dev; 885 struct ibmvnic_tx_buff *tx_buff = NULL; 886 struct ibmvnic_sub_crq_queue *tx_scrq; 887 struct ibmvnic_tx_pool *tx_pool; 888 unsigned int tx_send_failed = 0; 889 unsigned int tx_map_failed = 0; 890 unsigned int tx_dropped = 0; 891 unsigned int tx_packets = 0; 892 unsigned int tx_bytes = 0; 893 dma_addr_t data_dma_addr; 894 struct netdev_queue *txq; 895 unsigned long lpar_rc; 896 union sub_crq tx_crq; 897 unsigned int offset; 898 int num_entries = 1; 899 unsigned char *dst; 900 u64 *handle_array; 901 int index = 0; 902 int ret = 0; 903 904 tx_pool = &adapter->tx_pool[queue_num]; 905 tx_scrq = adapter->tx_scrq[queue_num]; 906 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 907 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 908 be32_to_cpu(adapter->login_rsp_buf-> 909 off_txsubm_subcrqs)); 910 if (adapter->migrated) { 911 if (!netif_subqueue_stopped(netdev, skb)) 912 netif_stop_subqueue(netdev, queue_num); 913 dev_kfree_skb_any(skb); 914 915 tx_send_failed++; 916 tx_dropped++; 917 ret = NETDEV_TX_OK; 918 goto out; 919 } 920 921 index = tx_pool->free_map[tx_pool->consumer_index]; 922 offset = index * adapter->req_mtu; 923 dst = tx_pool->long_term_buff.buff + offset; 924 memset(dst, 0, adapter->req_mtu); 925 skb_copy_from_linear_data(skb, dst, skb->len); 926 data_dma_addr = tx_pool->long_term_buff.addr + offset; 927 928 tx_pool->consumer_index = 929 (tx_pool->consumer_index + 1) % 930 adapter->req_tx_entries_per_subcrq; 931 932 tx_buff = &tx_pool->tx_buff[index]; 933 tx_buff->skb = skb; 934 tx_buff->data_dma[0] = data_dma_addr; 935 tx_buff->data_len[0] = skb->len; 936 tx_buff->index = index; 937 tx_buff->pool_index = queue_num; 938 tx_buff->last_frag = true; 939 940 memset(&tx_crq, 0, sizeof(tx_crq)); 941 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 942 tx_crq.v1.type = IBMVNIC_TX_DESC; 943 tx_crq.v1.n_crq_elem = 1; 944 tx_crq.v1.n_sge = 1; 945 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 946 tx_crq.v1.correlator = cpu_to_be32(index); 947 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 948 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 949 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 950 951 if (adapter->vlan_header_insertion) { 952 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 953 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 954 } 955 956 if (skb->protocol == htons(ETH_P_IP)) { 957 if (ip_hdr(skb)->version == 4) 958 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 959 else if (ip_hdr(skb)->version == 6) 960 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 961 962 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 963 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 964 else if (ip_hdr(skb)->protocol != IPPROTO_TCP) 965 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 966 } 967 968 if (skb->ip_summed == CHECKSUM_PARTIAL) { 969 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 970 hdrs += 2; 971 } 972 /* determine if l2/3/4 headers are sent to firmware */ 973 if ((*hdrs >> 7) & 1 && 974 (skb->protocol == htons(ETH_P_IP) || 975 skb->protocol == htons(ETH_P_IPV6))) { 976 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 977 tx_crq.v1.n_crq_elem = num_entries; 978 tx_buff->indir_arr[0] = tx_crq; 979 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 980 sizeof(tx_buff->indir_arr), 981 DMA_TO_DEVICE); 982 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 983 dev_kfree_skb_any(skb); 984 tx_buff->skb = NULL; 985 if (!firmware_has_feature(FW_FEATURE_CMO)) 986 dev_err(dev, "tx: unable to map descriptor array\n"); 987 tx_map_failed++; 988 tx_dropped++; 989 ret = NETDEV_TX_OK; 990 goto out; 991 } 992 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 993 (u64)tx_buff->indir_dma, 994 (u64)num_entries); 995 } else { 996 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 997 &tx_crq); 998 } 999 if (lpar_rc != H_SUCCESS) { 1000 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 1001 1002 if (tx_pool->consumer_index == 0) 1003 tx_pool->consumer_index = 1004 adapter->req_tx_entries_per_subcrq - 1; 1005 else 1006 tx_pool->consumer_index--; 1007 1008 dev_kfree_skb_any(skb); 1009 tx_buff->skb = NULL; 1010 1011 if (lpar_rc == H_CLOSED) 1012 netif_stop_subqueue(netdev, queue_num); 1013 1014 tx_send_failed++; 1015 tx_dropped++; 1016 ret = NETDEV_TX_OK; 1017 goto out; 1018 } 1019 1020 if (atomic_inc_return(&tx_scrq->used) 1021 >= adapter->req_tx_entries_per_subcrq) { 1022 netdev_info(netdev, "Stopping queue %d\n", queue_num); 1023 netif_stop_subqueue(netdev, queue_num); 1024 } 1025 1026 tx_packets++; 1027 tx_bytes += skb->len; 1028 txq->trans_start = jiffies; 1029 ret = NETDEV_TX_OK; 1030 1031 out: 1032 netdev->stats.tx_dropped += tx_dropped; 1033 netdev->stats.tx_bytes += tx_bytes; 1034 netdev->stats.tx_packets += tx_packets; 1035 adapter->tx_send_failed += tx_send_failed; 1036 adapter->tx_map_failed += tx_map_failed; 1037 1038 return ret; 1039 } 1040 1041 static void ibmvnic_set_multi(struct net_device *netdev) 1042 { 1043 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1044 struct netdev_hw_addr *ha; 1045 union ibmvnic_crq crq; 1046 1047 memset(&crq, 0, sizeof(crq)); 1048 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1049 crq.request_capability.cmd = REQUEST_CAPABILITY; 1050 1051 if (netdev->flags & IFF_PROMISC) { 1052 if (!adapter->promisc_supported) 1053 return; 1054 } else { 1055 if (netdev->flags & IFF_ALLMULTI) { 1056 /* Accept all multicast */ 1057 memset(&crq, 0, sizeof(crq)); 1058 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1059 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1060 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1061 ibmvnic_send_crq(adapter, &crq); 1062 } else if (netdev_mc_empty(netdev)) { 1063 /* Reject all multicast */ 1064 memset(&crq, 0, sizeof(crq)); 1065 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1066 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1067 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1068 ibmvnic_send_crq(adapter, &crq); 1069 } else { 1070 /* Accept one or more multicast(s) */ 1071 netdev_for_each_mc_addr(ha, netdev) { 1072 memset(&crq, 0, sizeof(crq)); 1073 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1074 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1075 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1076 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1077 ha->addr); 1078 ibmvnic_send_crq(adapter, &crq); 1079 } 1080 } 1081 } 1082 } 1083 1084 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1085 { 1086 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1087 struct sockaddr *addr = p; 1088 union ibmvnic_crq crq; 1089 1090 if (!is_valid_ether_addr(addr->sa_data)) 1091 return -EADDRNOTAVAIL; 1092 1093 memset(&crq, 0, sizeof(crq)); 1094 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1095 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1096 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1097 ibmvnic_send_crq(adapter, &crq); 1098 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1099 return 0; 1100 } 1101 1102 static void ibmvnic_tx_timeout(struct net_device *dev) 1103 { 1104 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1105 int rc; 1106 1107 /* Adapter timed out, resetting it */ 1108 release_sub_crqs(adapter); 1109 rc = ibmvnic_reset_crq(adapter); 1110 if (rc) 1111 dev_err(&adapter->vdev->dev, "Adapter timeout, reset failed\n"); 1112 else 1113 ibmvnic_send_crq_init(adapter); 1114 } 1115 1116 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 1117 struct ibmvnic_rx_buff *rx_buff) 1118 { 1119 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 1120 1121 rx_buff->skb = NULL; 1122 1123 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 1124 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 1125 1126 atomic_dec(&pool->available); 1127 } 1128 1129 static int ibmvnic_poll(struct napi_struct *napi, int budget) 1130 { 1131 struct net_device *netdev = napi->dev; 1132 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1133 int scrq_num = (int)(napi - adapter->napi); 1134 int frames_processed = 0; 1135 restart_poll: 1136 while (frames_processed < budget) { 1137 struct sk_buff *skb; 1138 struct ibmvnic_rx_buff *rx_buff; 1139 union sub_crq *next; 1140 u32 length; 1141 u16 offset; 1142 u8 flags = 0; 1143 1144 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 1145 break; 1146 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 1147 rx_buff = 1148 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 1149 rx_comp.correlator); 1150 /* do error checking */ 1151 if (next->rx_comp.rc) { 1152 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); 1153 /* free the entry */ 1154 next->rx_comp.first = 0; 1155 remove_buff_from_pool(adapter, rx_buff); 1156 break; 1157 } 1158 1159 length = be32_to_cpu(next->rx_comp.len); 1160 offset = be16_to_cpu(next->rx_comp.off_frame_data); 1161 flags = next->rx_comp.flags; 1162 skb = rx_buff->skb; 1163 skb_copy_to_linear_data(skb, rx_buff->data + offset, 1164 length); 1165 1166 /* VLAN Header has been stripped by the system firmware and 1167 * needs to be inserted by the driver 1168 */ 1169 if (adapter->rx_vlan_header_insertion && 1170 (flags & IBMVNIC_VLAN_STRIPPED)) 1171 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1172 ntohs(next->rx_comp.vlan_tci)); 1173 1174 /* free the entry */ 1175 next->rx_comp.first = 0; 1176 remove_buff_from_pool(adapter, rx_buff); 1177 1178 skb_put(skb, length); 1179 skb->protocol = eth_type_trans(skb, netdev); 1180 1181 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 1182 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 1183 skb->ip_summed = CHECKSUM_UNNECESSARY; 1184 } 1185 1186 length = skb->len; 1187 napi_gro_receive(napi, skb); /* send it up */ 1188 netdev->stats.rx_packets++; 1189 netdev->stats.rx_bytes += length; 1190 frames_processed++; 1191 } 1192 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 1193 1194 if (frames_processed < budget) { 1195 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1196 napi_complete_done(napi, frames_processed); 1197 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1198 napi_reschedule(napi)) { 1199 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1200 goto restart_poll; 1201 } 1202 } 1203 return frames_processed; 1204 } 1205 1206 #ifdef CONFIG_NET_POLL_CONTROLLER 1207 static void ibmvnic_netpoll_controller(struct net_device *dev) 1208 { 1209 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1210 int i; 1211 1212 replenish_pools(netdev_priv(dev)); 1213 for (i = 0; i < adapter->req_rx_queues; i++) 1214 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1215 adapter->rx_scrq[i]); 1216 } 1217 #endif 1218 1219 static const struct net_device_ops ibmvnic_netdev_ops = { 1220 .ndo_open = ibmvnic_open, 1221 .ndo_stop = ibmvnic_close, 1222 .ndo_start_xmit = ibmvnic_xmit, 1223 .ndo_set_rx_mode = ibmvnic_set_multi, 1224 .ndo_set_mac_address = ibmvnic_set_mac, 1225 .ndo_validate_addr = eth_validate_addr, 1226 .ndo_tx_timeout = ibmvnic_tx_timeout, 1227 #ifdef CONFIG_NET_POLL_CONTROLLER 1228 .ndo_poll_controller = ibmvnic_netpoll_controller, 1229 #endif 1230 }; 1231 1232 /* ethtool functions */ 1233 1234 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 1235 struct ethtool_link_ksettings *cmd) 1236 { 1237 u32 supported, advertising; 1238 1239 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 1240 SUPPORTED_FIBRE); 1241 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 1242 ADVERTISED_FIBRE); 1243 cmd->base.speed = SPEED_1000; 1244 cmd->base.duplex = DUPLEX_FULL; 1245 cmd->base.port = PORT_FIBRE; 1246 cmd->base.phy_address = 0; 1247 cmd->base.autoneg = AUTONEG_ENABLE; 1248 1249 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1250 supported); 1251 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1252 advertising); 1253 1254 return 0; 1255 } 1256 1257 static void ibmvnic_get_drvinfo(struct net_device *dev, 1258 struct ethtool_drvinfo *info) 1259 { 1260 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 1261 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 1262 } 1263 1264 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 1265 { 1266 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1267 1268 return adapter->msg_enable; 1269 } 1270 1271 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 1272 { 1273 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1274 1275 adapter->msg_enable = data; 1276 } 1277 1278 static u32 ibmvnic_get_link(struct net_device *netdev) 1279 { 1280 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1281 1282 /* Don't need to send a query because we request a logical link up at 1283 * init and then we wait for link state indications 1284 */ 1285 return adapter->logical_link_state; 1286 } 1287 1288 static void ibmvnic_get_ringparam(struct net_device *netdev, 1289 struct ethtool_ringparam *ring) 1290 { 1291 ring->rx_max_pending = 0; 1292 ring->tx_max_pending = 0; 1293 ring->rx_mini_max_pending = 0; 1294 ring->rx_jumbo_max_pending = 0; 1295 ring->rx_pending = 0; 1296 ring->tx_pending = 0; 1297 ring->rx_mini_pending = 0; 1298 ring->rx_jumbo_pending = 0; 1299 } 1300 1301 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 1302 { 1303 int i; 1304 1305 if (stringset != ETH_SS_STATS) 1306 return; 1307 1308 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 1309 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 1310 } 1311 1312 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 1313 { 1314 switch (sset) { 1315 case ETH_SS_STATS: 1316 return ARRAY_SIZE(ibmvnic_stats); 1317 default: 1318 return -EOPNOTSUPP; 1319 } 1320 } 1321 1322 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 1323 struct ethtool_stats *stats, u64 *data) 1324 { 1325 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1326 union ibmvnic_crq crq; 1327 int i; 1328 1329 memset(&crq, 0, sizeof(crq)); 1330 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 1331 crq.request_statistics.cmd = REQUEST_STATISTICS; 1332 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 1333 crq.request_statistics.len = 1334 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 1335 1336 /* Wait for data to be written */ 1337 init_completion(&adapter->stats_done); 1338 ibmvnic_send_crq(adapter, &crq); 1339 wait_for_completion(&adapter->stats_done); 1340 1341 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 1342 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); 1343 } 1344 1345 static const struct ethtool_ops ibmvnic_ethtool_ops = { 1346 .get_drvinfo = ibmvnic_get_drvinfo, 1347 .get_msglevel = ibmvnic_get_msglevel, 1348 .set_msglevel = ibmvnic_set_msglevel, 1349 .get_link = ibmvnic_get_link, 1350 .get_ringparam = ibmvnic_get_ringparam, 1351 .get_strings = ibmvnic_get_strings, 1352 .get_sset_count = ibmvnic_get_sset_count, 1353 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 1354 .get_link_ksettings = ibmvnic_get_link_ksettings, 1355 }; 1356 1357 /* Routines for managing CRQs/sCRQs */ 1358 1359 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 1360 struct ibmvnic_sub_crq_queue *scrq) 1361 { 1362 struct device *dev = &adapter->vdev->dev; 1363 long rc; 1364 1365 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 1366 1367 /* Close the sub-crqs */ 1368 do { 1369 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 1370 adapter->vdev->unit_address, 1371 scrq->crq_num); 1372 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 1373 1374 if (rc) { 1375 netdev_err(adapter->netdev, 1376 "Failed to release sub-CRQ %16lx, rc = %ld\n", 1377 scrq->crq_num, rc); 1378 } 1379 1380 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1381 DMA_BIDIRECTIONAL); 1382 free_pages((unsigned long)scrq->msgs, 2); 1383 kfree(scrq); 1384 } 1385 1386 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 1387 *adapter) 1388 { 1389 struct device *dev = &adapter->vdev->dev; 1390 struct ibmvnic_sub_crq_queue *scrq; 1391 int rc; 1392 1393 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 1394 if (!scrq) 1395 return NULL; 1396 1397 scrq->msgs = 1398 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 1399 if (!scrq->msgs) { 1400 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 1401 goto zero_page_failed; 1402 } 1403 1404 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 1405 DMA_BIDIRECTIONAL); 1406 if (dma_mapping_error(dev, scrq->msg_token)) { 1407 dev_warn(dev, "Couldn't map crq queue messages page\n"); 1408 goto map_failed; 1409 } 1410 1411 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1412 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1413 1414 if (rc == H_RESOURCE) 1415 rc = ibmvnic_reset_crq(adapter); 1416 1417 if (rc == H_CLOSED) { 1418 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 1419 } else if (rc) { 1420 dev_warn(dev, "Error %d registering sub-crq\n", rc); 1421 goto reg_failed; 1422 } 1423 1424 scrq->adapter = adapter; 1425 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 1426 spin_lock_init(&scrq->lock); 1427 1428 netdev_dbg(adapter->netdev, 1429 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 1430 scrq->crq_num, scrq->hw_irq, scrq->irq); 1431 1432 return scrq; 1433 1434 reg_failed: 1435 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1436 DMA_BIDIRECTIONAL); 1437 map_failed: 1438 free_pages((unsigned long)scrq->msgs, 2); 1439 zero_page_failed: 1440 kfree(scrq); 1441 1442 return NULL; 1443 } 1444 1445 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 1446 { 1447 int i; 1448 1449 if (adapter->tx_scrq) { 1450 for (i = 0; i < adapter->req_tx_queues; i++) { 1451 if (!adapter->tx_scrq[i]) 1452 continue; 1453 1454 if (adapter->tx_scrq[i]->irq) { 1455 free_irq(adapter->tx_scrq[i]->irq, 1456 adapter->tx_scrq[i]); 1457 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 1458 adapter->tx_scrq[i]->irq = 0; 1459 } 1460 1461 release_sub_crq_queue(adapter, adapter->tx_scrq[i]); 1462 } 1463 1464 kfree(adapter->tx_scrq); 1465 adapter->tx_scrq = NULL; 1466 } 1467 1468 if (adapter->rx_scrq) { 1469 for (i = 0; i < adapter->req_rx_queues; i++) { 1470 if (!adapter->rx_scrq[i]) 1471 continue; 1472 1473 if (adapter->rx_scrq[i]->irq) { 1474 free_irq(adapter->rx_scrq[i]->irq, 1475 adapter->rx_scrq[i]); 1476 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 1477 adapter->rx_scrq[i]->irq = 0; 1478 } 1479 1480 release_sub_crq_queue(adapter, adapter->rx_scrq[i]); 1481 } 1482 1483 kfree(adapter->rx_scrq); 1484 adapter->rx_scrq = NULL; 1485 } 1486 } 1487 1488 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 1489 struct ibmvnic_sub_crq_queue *scrq) 1490 { 1491 struct device *dev = &adapter->vdev->dev; 1492 unsigned long rc; 1493 1494 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1495 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1496 if (rc) 1497 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 1498 scrq->hw_irq, rc); 1499 return rc; 1500 } 1501 1502 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 1503 struct ibmvnic_sub_crq_queue *scrq) 1504 { 1505 struct device *dev = &adapter->vdev->dev; 1506 unsigned long rc; 1507 1508 if (scrq->hw_irq > 0x100000000ULL) { 1509 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 1510 return 1; 1511 } 1512 1513 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1514 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1515 if (rc) 1516 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 1517 scrq->hw_irq, rc); 1518 return rc; 1519 } 1520 1521 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 1522 struct ibmvnic_sub_crq_queue *scrq) 1523 { 1524 struct device *dev = &adapter->vdev->dev; 1525 struct ibmvnic_tx_buff *txbuff; 1526 union sub_crq *next; 1527 int index; 1528 int i, j; 1529 u8 first; 1530 1531 restart_loop: 1532 while (pending_scrq(adapter, scrq)) { 1533 unsigned int pool = scrq->pool_index; 1534 1535 next = ibmvnic_next_scrq(adapter, scrq); 1536 for (i = 0; i < next->tx_comp.num_comps; i++) { 1537 if (next->tx_comp.rcs[i]) { 1538 dev_err(dev, "tx error %x\n", 1539 next->tx_comp.rcs[i]); 1540 continue; 1541 } 1542 index = be32_to_cpu(next->tx_comp.correlators[i]); 1543 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 1544 1545 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 1546 if (!txbuff->data_dma[j]) 1547 continue; 1548 1549 txbuff->data_dma[j] = 0; 1550 } 1551 /* if sub_crq was sent indirectly */ 1552 first = txbuff->indir_arr[0].generic.first; 1553 if (first == IBMVNIC_CRQ_CMD) { 1554 dma_unmap_single(dev, txbuff->indir_dma, 1555 sizeof(txbuff->indir_arr), 1556 DMA_TO_DEVICE); 1557 } 1558 1559 if (txbuff->last_frag) { 1560 if (atomic_sub_return(next->tx_comp.num_comps, 1561 &scrq->used) <= 1562 (adapter->req_tx_entries_per_subcrq / 2) && 1563 netif_subqueue_stopped(adapter->netdev, 1564 txbuff->skb)) { 1565 netif_wake_subqueue(adapter->netdev, 1566 scrq->pool_index); 1567 netdev_dbg(adapter->netdev, 1568 "Started queue %d\n", 1569 scrq->pool_index); 1570 } 1571 1572 dev_kfree_skb_any(txbuff->skb); 1573 } 1574 1575 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 1576 producer_index] = index; 1577 adapter->tx_pool[pool].producer_index = 1578 (adapter->tx_pool[pool].producer_index + 1) % 1579 adapter->req_tx_entries_per_subcrq; 1580 } 1581 /* remove tx_comp scrq*/ 1582 next->tx_comp.first = 0; 1583 } 1584 1585 enable_scrq_irq(adapter, scrq); 1586 1587 if (pending_scrq(adapter, scrq)) { 1588 disable_scrq_irq(adapter, scrq); 1589 goto restart_loop; 1590 } 1591 1592 return 0; 1593 } 1594 1595 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 1596 { 1597 struct ibmvnic_sub_crq_queue *scrq = instance; 1598 struct ibmvnic_adapter *adapter = scrq->adapter; 1599 1600 disable_scrq_irq(adapter, scrq); 1601 ibmvnic_complete_tx(adapter, scrq); 1602 1603 return IRQ_HANDLED; 1604 } 1605 1606 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 1607 { 1608 struct ibmvnic_sub_crq_queue *scrq = instance; 1609 struct ibmvnic_adapter *adapter = scrq->adapter; 1610 1611 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 1612 disable_scrq_irq(adapter, scrq); 1613 __napi_schedule(&adapter->napi[scrq->scrq_num]); 1614 } 1615 1616 return IRQ_HANDLED; 1617 } 1618 1619 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 1620 { 1621 struct device *dev = &adapter->vdev->dev; 1622 struct ibmvnic_sub_crq_queue *scrq; 1623 int i = 0, j = 0; 1624 int rc = 0; 1625 1626 for (i = 0; i < adapter->req_tx_queues; i++) { 1627 scrq = adapter->tx_scrq[i]; 1628 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1629 1630 if (!scrq->irq) { 1631 rc = -EINVAL; 1632 dev_err(dev, "Error mapping irq\n"); 1633 goto req_tx_irq_failed; 1634 } 1635 1636 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 1637 0, "ibmvnic_tx", scrq); 1638 1639 if (rc) { 1640 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 1641 scrq->irq, rc); 1642 irq_dispose_mapping(scrq->irq); 1643 goto req_rx_irq_failed; 1644 } 1645 } 1646 1647 for (i = 0; i < adapter->req_rx_queues; i++) { 1648 scrq = adapter->rx_scrq[i]; 1649 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1650 if (!scrq->irq) { 1651 rc = -EINVAL; 1652 dev_err(dev, "Error mapping irq\n"); 1653 goto req_rx_irq_failed; 1654 } 1655 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 1656 0, "ibmvnic_rx", scrq); 1657 if (rc) { 1658 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 1659 scrq->irq, rc); 1660 irq_dispose_mapping(scrq->irq); 1661 goto req_rx_irq_failed; 1662 } 1663 } 1664 return rc; 1665 1666 req_rx_irq_failed: 1667 for (j = 0; j < i; j++) { 1668 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 1669 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1670 } 1671 i = adapter->req_tx_queues; 1672 req_tx_irq_failed: 1673 for (j = 0; j < i; j++) { 1674 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 1675 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1676 } 1677 release_sub_crqs(adapter); 1678 return rc; 1679 } 1680 1681 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 1682 { 1683 struct device *dev = &adapter->vdev->dev; 1684 struct ibmvnic_sub_crq_queue **allqueues; 1685 int registered_queues = 0; 1686 int total_queues; 1687 int more = 0; 1688 int i; 1689 1690 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 1691 1692 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 1693 if (!allqueues) 1694 return -1; 1695 1696 for (i = 0; i < total_queues; i++) { 1697 allqueues[i] = init_sub_crq_queue(adapter); 1698 if (!allqueues[i]) { 1699 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 1700 break; 1701 } 1702 registered_queues++; 1703 } 1704 1705 /* Make sure we were able to register the minimum number of queues */ 1706 if (registered_queues < 1707 adapter->min_tx_queues + adapter->min_rx_queues) { 1708 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 1709 goto tx_failed; 1710 } 1711 1712 /* Distribute the failed allocated queues*/ 1713 for (i = 0; i < total_queues - registered_queues + more ; i++) { 1714 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 1715 switch (i % 3) { 1716 case 0: 1717 if (adapter->req_rx_queues > adapter->min_rx_queues) 1718 adapter->req_rx_queues--; 1719 else 1720 more++; 1721 break; 1722 case 1: 1723 if (adapter->req_tx_queues > adapter->min_tx_queues) 1724 adapter->req_tx_queues--; 1725 else 1726 more++; 1727 break; 1728 } 1729 } 1730 1731 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 1732 sizeof(*adapter->tx_scrq), GFP_KERNEL); 1733 if (!adapter->tx_scrq) 1734 goto tx_failed; 1735 1736 for (i = 0; i < adapter->req_tx_queues; i++) { 1737 adapter->tx_scrq[i] = allqueues[i]; 1738 adapter->tx_scrq[i]->pool_index = i; 1739 } 1740 1741 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 1742 sizeof(*adapter->rx_scrq), GFP_KERNEL); 1743 if (!adapter->rx_scrq) 1744 goto rx_failed; 1745 1746 for (i = 0; i < adapter->req_rx_queues; i++) { 1747 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 1748 adapter->rx_scrq[i]->scrq_num = i; 1749 } 1750 1751 kfree(allqueues); 1752 return 0; 1753 1754 rx_failed: 1755 kfree(adapter->tx_scrq); 1756 adapter->tx_scrq = NULL; 1757 tx_failed: 1758 for (i = 0; i < registered_queues; i++) 1759 release_sub_crq_queue(adapter, allqueues[i]); 1760 kfree(allqueues); 1761 return -1; 1762 } 1763 1764 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 1765 { 1766 struct device *dev = &adapter->vdev->dev; 1767 union ibmvnic_crq crq; 1768 1769 if (!retry) { 1770 /* Sub-CRQ entries are 32 byte long */ 1771 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 1772 1773 if (adapter->min_tx_entries_per_subcrq > entries_page || 1774 adapter->min_rx_add_entries_per_subcrq > entries_page) { 1775 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 1776 return; 1777 } 1778 1779 /* Get the minimum between the queried max and the entries 1780 * that fit in our PAGE_SIZE 1781 */ 1782 adapter->req_tx_entries_per_subcrq = 1783 adapter->max_tx_entries_per_subcrq > entries_page ? 1784 entries_page : adapter->max_tx_entries_per_subcrq; 1785 adapter->req_rx_add_entries_per_subcrq = 1786 adapter->max_rx_add_entries_per_subcrq > entries_page ? 1787 entries_page : adapter->max_rx_add_entries_per_subcrq; 1788 1789 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; 1790 adapter->req_rx_queues = adapter->opt_rx_comp_queues; 1791 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 1792 1793 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 1794 } 1795 1796 memset(&crq, 0, sizeof(crq)); 1797 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1798 crq.request_capability.cmd = REQUEST_CAPABILITY; 1799 1800 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 1801 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 1802 atomic_inc(&adapter->running_cap_crqs); 1803 ibmvnic_send_crq(adapter, &crq); 1804 1805 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 1806 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 1807 atomic_inc(&adapter->running_cap_crqs); 1808 ibmvnic_send_crq(adapter, &crq); 1809 1810 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 1811 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 1812 atomic_inc(&adapter->running_cap_crqs); 1813 ibmvnic_send_crq(adapter, &crq); 1814 1815 crq.request_capability.capability = 1816 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 1817 crq.request_capability.number = 1818 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 1819 atomic_inc(&adapter->running_cap_crqs); 1820 ibmvnic_send_crq(adapter, &crq); 1821 1822 crq.request_capability.capability = 1823 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 1824 crq.request_capability.number = 1825 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 1826 atomic_inc(&adapter->running_cap_crqs); 1827 ibmvnic_send_crq(adapter, &crq); 1828 1829 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 1830 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 1831 atomic_inc(&adapter->running_cap_crqs); 1832 ibmvnic_send_crq(adapter, &crq); 1833 1834 if (adapter->netdev->flags & IFF_PROMISC) { 1835 if (adapter->promisc_supported) { 1836 crq.request_capability.capability = 1837 cpu_to_be16(PROMISC_REQUESTED); 1838 crq.request_capability.number = cpu_to_be64(1); 1839 atomic_inc(&adapter->running_cap_crqs); 1840 ibmvnic_send_crq(adapter, &crq); 1841 } 1842 } else { 1843 crq.request_capability.capability = 1844 cpu_to_be16(PROMISC_REQUESTED); 1845 crq.request_capability.number = cpu_to_be64(0); 1846 atomic_inc(&adapter->running_cap_crqs); 1847 ibmvnic_send_crq(adapter, &crq); 1848 } 1849 } 1850 1851 static int pending_scrq(struct ibmvnic_adapter *adapter, 1852 struct ibmvnic_sub_crq_queue *scrq) 1853 { 1854 union sub_crq *entry = &scrq->msgs[scrq->cur]; 1855 1856 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || adapter->closing) 1857 return 1; 1858 else 1859 return 0; 1860 } 1861 1862 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 1863 struct ibmvnic_sub_crq_queue *scrq) 1864 { 1865 union sub_crq *entry; 1866 unsigned long flags; 1867 1868 spin_lock_irqsave(&scrq->lock, flags); 1869 entry = &scrq->msgs[scrq->cur]; 1870 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1871 if (++scrq->cur == scrq->size) 1872 scrq->cur = 0; 1873 } else { 1874 entry = NULL; 1875 } 1876 spin_unlock_irqrestore(&scrq->lock, flags); 1877 1878 return entry; 1879 } 1880 1881 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 1882 { 1883 struct ibmvnic_crq_queue *queue = &adapter->crq; 1884 union ibmvnic_crq *crq; 1885 1886 crq = &queue->msgs[queue->cur]; 1887 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 1888 if (++queue->cur == queue->size) 1889 queue->cur = 0; 1890 } else { 1891 crq = NULL; 1892 } 1893 1894 return crq; 1895 } 1896 1897 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 1898 union sub_crq *sub_crq) 1899 { 1900 unsigned int ua = adapter->vdev->unit_address; 1901 struct device *dev = &adapter->vdev->dev; 1902 u64 *u64_crq = (u64 *)sub_crq; 1903 int rc; 1904 1905 netdev_dbg(adapter->netdev, 1906 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 1907 (unsigned long int)cpu_to_be64(remote_handle), 1908 (unsigned long int)cpu_to_be64(u64_crq[0]), 1909 (unsigned long int)cpu_to_be64(u64_crq[1]), 1910 (unsigned long int)cpu_to_be64(u64_crq[2]), 1911 (unsigned long int)cpu_to_be64(u64_crq[3])); 1912 1913 /* Make sure the hypervisor sees the complete request */ 1914 mb(); 1915 1916 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 1917 cpu_to_be64(remote_handle), 1918 cpu_to_be64(u64_crq[0]), 1919 cpu_to_be64(u64_crq[1]), 1920 cpu_to_be64(u64_crq[2]), 1921 cpu_to_be64(u64_crq[3])); 1922 1923 if (rc) { 1924 if (rc == H_CLOSED) 1925 dev_warn(dev, "CRQ Queue closed\n"); 1926 dev_err(dev, "Send error (rc=%d)\n", rc); 1927 } 1928 1929 return rc; 1930 } 1931 1932 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 1933 u64 remote_handle, u64 ioba, u64 num_entries) 1934 { 1935 unsigned int ua = adapter->vdev->unit_address; 1936 struct device *dev = &adapter->vdev->dev; 1937 int rc; 1938 1939 /* Make sure the hypervisor sees the complete request */ 1940 mb(); 1941 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 1942 cpu_to_be64(remote_handle), 1943 ioba, num_entries); 1944 1945 if (rc) { 1946 if (rc == H_CLOSED) 1947 dev_warn(dev, "CRQ Queue closed\n"); 1948 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 1949 } 1950 1951 return rc; 1952 } 1953 1954 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 1955 union ibmvnic_crq *crq) 1956 { 1957 unsigned int ua = adapter->vdev->unit_address; 1958 struct device *dev = &adapter->vdev->dev; 1959 u64 *u64_crq = (u64 *)crq; 1960 int rc; 1961 1962 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 1963 (unsigned long int)cpu_to_be64(u64_crq[0]), 1964 (unsigned long int)cpu_to_be64(u64_crq[1])); 1965 1966 /* Make sure the hypervisor sees the complete request */ 1967 mb(); 1968 1969 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 1970 cpu_to_be64(u64_crq[0]), 1971 cpu_to_be64(u64_crq[1])); 1972 1973 if (rc) { 1974 if (rc == H_CLOSED) 1975 dev_warn(dev, "CRQ Queue closed\n"); 1976 dev_warn(dev, "Send error (rc=%d)\n", rc); 1977 } 1978 1979 return rc; 1980 } 1981 1982 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 1983 { 1984 union ibmvnic_crq crq; 1985 1986 memset(&crq, 0, sizeof(crq)); 1987 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 1988 crq.generic.cmd = IBMVNIC_CRQ_INIT; 1989 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 1990 1991 return ibmvnic_send_crq(adapter, &crq); 1992 } 1993 1994 static int ibmvnic_send_crq_init_complete(struct ibmvnic_adapter *adapter) 1995 { 1996 union ibmvnic_crq crq; 1997 1998 memset(&crq, 0, sizeof(crq)); 1999 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 2000 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 2001 netdev_dbg(adapter->netdev, "Sending CRQ init complete\n"); 2002 2003 return ibmvnic_send_crq(adapter, &crq); 2004 } 2005 2006 static int send_version_xchg(struct ibmvnic_adapter *adapter) 2007 { 2008 union ibmvnic_crq crq; 2009 2010 memset(&crq, 0, sizeof(crq)); 2011 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 2012 crq.version_exchange.cmd = VERSION_EXCHANGE; 2013 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 2014 2015 return ibmvnic_send_crq(adapter, &crq); 2016 } 2017 2018 static void send_login(struct ibmvnic_adapter *adapter) 2019 { 2020 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 2021 struct ibmvnic_login_buffer *login_buffer; 2022 struct device *dev = &adapter->vdev->dev; 2023 dma_addr_t rsp_buffer_token; 2024 dma_addr_t buffer_token; 2025 size_t rsp_buffer_size; 2026 union ibmvnic_crq crq; 2027 size_t buffer_size; 2028 __be64 *tx_list_p; 2029 __be64 *rx_list_p; 2030 int i; 2031 2032 buffer_size = 2033 sizeof(struct ibmvnic_login_buffer) + 2034 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); 2035 2036 login_buffer = kmalloc(buffer_size, GFP_ATOMIC); 2037 if (!login_buffer) 2038 goto buf_alloc_failed; 2039 2040 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 2041 DMA_TO_DEVICE); 2042 if (dma_mapping_error(dev, buffer_token)) { 2043 dev_err(dev, "Couldn't map login buffer\n"); 2044 goto buf_map_failed; 2045 } 2046 2047 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 2048 sizeof(u64) * adapter->req_tx_queues + 2049 sizeof(u64) * adapter->req_rx_queues + 2050 sizeof(u64) * adapter->req_rx_queues + 2051 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 2052 2053 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 2054 if (!login_rsp_buffer) 2055 goto buf_rsp_alloc_failed; 2056 2057 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 2058 rsp_buffer_size, DMA_FROM_DEVICE); 2059 if (dma_mapping_error(dev, rsp_buffer_token)) { 2060 dev_err(dev, "Couldn't map login rsp buffer\n"); 2061 goto buf_rsp_map_failed; 2062 } 2063 2064 adapter->login_buf = login_buffer; 2065 adapter->login_buf_token = buffer_token; 2066 adapter->login_buf_sz = buffer_size; 2067 adapter->login_rsp_buf = login_rsp_buffer; 2068 adapter->login_rsp_buf_token = rsp_buffer_token; 2069 adapter->login_rsp_buf_sz = rsp_buffer_size; 2070 2071 login_buffer->len = cpu_to_be32(buffer_size); 2072 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 2073 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 2074 login_buffer->off_txcomp_subcrqs = 2075 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 2076 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 2077 login_buffer->off_rxcomp_subcrqs = 2078 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 2079 sizeof(u64) * adapter->req_tx_queues); 2080 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 2081 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 2082 2083 tx_list_p = (__be64 *)((char *)login_buffer + 2084 sizeof(struct ibmvnic_login_buffer)); 2085 rx_list_p = (__be64 *)((char *)login_buffer + 2086 sizeof(struct ibmvnic_login_buffer) + 2087 sizeof(u64) * adapter->req_tx_queues); 2088 2089 for (i = 0; i < adapter->req_tx_queues; i++) { 2090 if (adapter->tx_scrq[i]) { 2091 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 2092 crq_num); 2093 } 2094 } 2095 2096 for (i = 0; i < adapter->req_rx_queues; i++) { 2097 if (adapter->rx_scrq[i]) { 2098 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 2099 crq_num); 2100 } 2101 } 2102 2103 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 2104 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 2105 netdev_dbg(adapter->netdev, "%016lx\n", 2106 ((unsigned long int *)(adapter->login_buf))[i]); 2107 } 2108 2109 memset(&crq, 0, sizeof(crq)); 2110 crq.login.first = IBMVNIC_CRQ_CMD; 2111 crq.login.cmd = LOGIN; 2112 crq.login.ioba = cpu_to_be32(buffer_token); 2113 crq.login.len = cpu_to_be32(buffer_size); 2114 ibmvnic_send_crq(adapter, &crq); 2115 2116 return; 2117 2118 buf_rsp_map_failed: 2119 kfree(login_rsp_buffer); 2120 buf_rsp_alloc_failed: 2121 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 2122 buf_map_failed: 2123 kfree(login_buffer); 2124 buf_alloc_failed: 2125 return; 2126 } 2127 2128 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 2129 u32 len, u8 map_id) 2130 { 2131 union ibmvnic_crq crq; 2132 2133 memset(&crq, 0, sizeof(crq)); 2134 crq.request_map.first = IBMVNIC_CRQ_CMD; 2135 crq.request_map.cmd = REQUEST_MAP; 2136 crq.request_map.map_id = map_id; 2137 crq.request_map.ioba = cpu_to_be32(addr); 2138 crq.request_map.len = cpu_to_be32(len); 2139 ibmvnic_send_crq(adapter, &crq); 2140 } 2141 2142 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 2143 { 2144 union ibmvnic_crq crq; 2145 2146 memset(&crq, 0, sizeof(crq)); 2147 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 2148 crq.request_unmap.cmd = REQUEST_UNMAP; 2149 crq.request_unmap.map_id = map_id; 2150 ibmvnic_send_crq(adapter, &crq); 2151 } 2152 2153 static void send_map_query(struct ibmvnic_adapter *adapter) 2154 { 2155 union ibmvnic_crq crq; 2156 2157 memset(&crq, 0, sizeof(crq)); 2158 crq.query_map.first = IBMVNIC_CRQ_CMD; 2159 crq.query_map.cmd = QUERY_MAP; 2160 ibmvnic_send_crq(adapter, &crq); 2161 } 2162 2163 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 2164 static void send_cap_queries(struct ibmvnic_adapter *adapter) 2165 { 2166 union ibmvnic_crq crq; 2167 2168 atomic_set(&adapter->running_cap_crqs, 0); 2169 memset(&crq, 0, sizeof(crq)); 2170 crq.query_capability.first = IBMVNIC_CRQ_CMD; 2171 crq.query_capability.cmd = QUERY_CAPABILITY; 2172 2173 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 2174 atomic_inc(&adapter->running_cap_crqs); 2175 ibmvnic_send_crq(adapter, &crq); 2176 2177 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 2178 atomic_inc(&adapter->running_cap_crqs); 2179 ibmvnic_send_crq(adapter, &crq); 2180 2181 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 2182 atomic_inc(&adapter->running_cap_crqs); 2183 ibmvnic_send_crq(adapter, &crq); 2184 2185 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 2186 atomic_inc(&adapter->running_cap_crqs); 2187 ibmvnic_send_crq(adapter, &crq); 2188 2189 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 2190 atomic_inc(&adapter->running_cap_crqs); 2191 ibmvnic_send_crq(adapter, &crq); 2192 2193 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 2194 atomic_inc(&adapter->running_cap_crqs); 2195 ibmvnic_send_crq(adapter, &crq); 2196 2197 crq.query_capability.capability = 2198 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 2199 atomic_inc(&adapter->running_cap_crqs); 2200 ibmvnic_send_crq(adapter, &crq); 2201 2202 crq.query_capability.capability = 2203 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 2204 atomic_inc(&adapter->running_cap_crqs); 2205 ibmvnic_send_crq(adapter, &crq); 2206 2207 crq.query_capability.capability = 2208 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 2209 atomic_inc(&adapter->running_cap_crqs); 2210 ibmvnic_send_crq(adapter, &crq); 2211 2212 crq.query_capability.capability = 2213 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 2214 atomic_inc(&adapter->running_cap_crqs); 2215 ibmvnic_send_crq(adapter, &crq); 2216 2217 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 2218 atomic_inc(&adapter->running_cap_crqs); 2219 ibmvnic_send_crq(adapter, &crq); 2220 2221 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 2222 atomic_inc(&adapter->running_cap_crqs); 2223 ibmvnic_send_crq(adapter, &crq); 2224 2225 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 2226 atomic_inc(&adapter->running_cap_crqs); 2227 ibmvnic_send_crq(adapter, &crq); 2228 2229 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 2230 atomic_inc(&adapter->running_cap_crqs); 2231 ibmvnic_send_crq(adapter, &crq); 2232 2233 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 2234 atomic_inc(&adapter->running_cap_crqs); 2235 ibmvnic_send_crq(adapter, &crq); 2236 2237 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 2238 atomic_inc(&adapter->running_cap_crqs); 2239 ibmvnic_send_crq(adapter, &crq); 2240 2241 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 2242 atomic_inc(&adapter->running_cap_crqs); 2243 ibmvnic_send_crq(adapter, &crq); 2244 2245 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 2246 atomic_inc(&adapter->running_cap_crqs); 2247 ibmvnic_send_crq(adapter, &crq); 2248 2249 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 2250 atomic_inc(&adapter->running_cap_crqs); 2251 ibmvnic_send_crq(adapter, &crq); 2252 2253 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 2254 atomic_inc(&adapter->running_cap_crqs); 2255 ibmvnic_send_crq(adapter, &crq); 2256 2257 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 2258 atomic_inc(&adapter->running_cap_crqs); 2259 ibmvnic_send_crq(adapter, &crq); 2260 2261 crq.query_capability.capability = 2262 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 2263 atomic_inc(&adapter->running_cap_crqs); 2264 ibmvnic_send_crq(adapter, &crq); 2265 2266 crq.query_capability.capability = 2267 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 2268 atomic_inc(&adapter->running_cap_crqs); 2269 ibmvnic_send_crq(adapter, &crq); 2270 2271 crq.query_capability.capability = 2272 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 2273 atomic_inc(&adapter->running_cap_crqs); 2274 ibmvnic_send_crq(adapter, &crq); 2275 2276 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 2277 atomic_inc(&adapter->running_cap_crqs); 2278 ibmvnic_send_crq(adapter, &crq); 2279 } 2280 2281 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 2282 { 2283 struct device *dev = &adapter->vdev->dev; 2284 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 2285 union ibmvnic_crq crq; 2286 int i; 2287 2288 dma_unmap_single(dev, adapter->ip_offload_tok, 2289 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 2290 2291 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 2292 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 2293 netdev_dbg(adapter->netdev, "%016lx\n", 2294 ((unsigned long int *)(buf))[i]); 2295 2296 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 2297 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 2298 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 2299 buf->tcp_ipv4_chksum); 2300 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 2301 buf->tcp_ipv6_chksum); 2302 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 2303 buf->udp_ipv4_chksum); 2304 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 2305 buf->udp_ipv6_chksum); 2306 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 2307 buf->large_tx_ipv4); 2308 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 2309 buf->large_tx_ipv6); 2310 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 2311 buf->large_rx_ipv4); 2312 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 2313 buf->large_rx_ipv6); 2314 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 2315 buf->max_ipv4_header_size); 2316 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 2317 buf->max_ipv6_header_size); 2318 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 2319 buf->max_tcp_header_size); 2320 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 2321 buf->max_udp_header_size); 2322 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 2323 buf->max_large_tx_size); 2324 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 2325 buf->max_large_rx_size); 2326 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 2327 buf->ipv6_extension_header); 2328 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 2329 buf->tcp_pseudosum_req); 2330 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 2331 buf->num_ipv6_ext_headers); 2332 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 2333 buf->off_ipv6_ext_headers); 2334 2335 adapter->ip_offload_ctrl_tok = 2336 dma_map_single(dev, &adapter->ip_offload_ctrl, 2337 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 2338 2339 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 2340 dev_err(dev, "Couldn't map ip offload control buffer\n"); 2341 return; 2342 } 2343 2344 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 2345 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 2346 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 2347 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 2348 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 2349 2350 /* large_tx/rx disabled for now, additional features needed */ 2351 adapter->ip_offload_ctrl.large_tx_ipv4 = 0; 2352 adapter->ip_offload_ctrl.large_tx_ipv6 = 0; 2353 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 2354 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 2355 2356 adapter->netdev->features = NETIF_F_GSO; 2357 2358 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 2359 adapter->netdev->features |= NETIF_F_IP_CSUM; 2360 2361 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 2362 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 2363 2364 if ((adapter->netdev->features & 2365 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 2366 adapter->netdev->features |= NETIF_F_RXCSUM; 2367 2368 memset(&crq, 0, sizeof(crq)); 2369 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 2370 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 2371 crq.control_ip_offload.len = 2372 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 2373 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 2374 ibmvnic_send_crq(adapter, &crq); 2375 } 2376 2377 static void handle_error_info_rsp(union ibmvnic_crq *crq, 2378 struct ibmvnic_adapter *adapter) 2379 { 2380 struct device *dev = &adapter->vdev->dev; 2381 struct ibmvnic_error_buff *error_buff, *tmp; 2382 unsigned long flags; 2383 bool found = false; 2384 int i; 2385 2386 if (!crq->request_error_rsp.rc.code) { 2387 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 2388 crq->request_error_rsp.rc.code); 2389 return; 2390 } 2391 2392 spin_lock_irqsave(&adapter->error_list_lock, flags); 2393 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 2394 if (error_buff->error_id == crq->request_error_rsp.error_id) { 2395 found = true; 2396 list_del(&error_buff->list); 2397 break; 2398 } 2399 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2400 2401 if (!found) { 2402 dev_err(dev, "Couldn't find error id %x\n", 2403 be32_to_cpu(crq->request_error_rsp.error_id)); 2404 return; 2405 } 2406 2407 dev_err(dev, "Detailed info for error id %x:", 2408 be32_to_cpu(crq->request_error_rsp.error_id)); 2409 2410 for (i = 0; i < error_buff->len; i++) { 2411 pr_cont("%02x", (int)error_buff->buff[i]); 2412 if (i % 8 == 7) 2413 pr_cont(" "); 2414 } 2415 pr_cont("\n"); 2416 2417 dma_unmap_single(dev, error_buff->dma, error_buff->len, 2418 DMA_FROM_DEVICE); 2419 kfree(error_buff->buff); 2420 kfree(error_buff); 2421 } 2422 2423 static void request_error_information(struct ibmvnic_adapter *adapter, 2424 union ibmvnic_crq *err_crq) 2425 { 2426 struct device *dev = &adapter->vdev->dev; 2427 struct net_device *netdev = adapter->netdev; 2428 struct ibmvnic_error_buff *error_buff; 2429 unsigned long timeout = msecs_to_jiffies(30000); 2430 union ibmvnic_crq crq; 2431 unsigned long flags; 2432 int rc, detail_len; 2433 2434 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 2435 if (!error_buff) 2436 return; 2437 2438 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz); 2439 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 2440 if (!error_buff->buff) { 2441 kfree(error_buff); 2442 return; 2443 } 2444 2445 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 2446 DMA_FROM_DEVICE); 2447 if (dma_mapping_error(dev, error_buff->dma)) { 2448 netdev_err(netdev, "Couldn't map error buffer\n"); 2449 kfree(error_buff->buff); 2450 kfree(error_buff); 2451 return; 2452 } 2453 2454 error_buff->len = detail_len; 2455 error_buff->error_id = err_crq->error_indication.error_id; 2456 2457 spin_lock_irqsave(&adapter->error_list_lock, flags); 2458 list_add_tail(&error_buff->list, &adapter->errors); 2459 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2460 2461 memset(&crq, 0, sizeof(crq)); 2462 crq.request_error_info.first = IBMVNIC_CRQ_CMD; 2463 crq.request_error_info.cmd = REQUEST_ERROR_INFO; 2464 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 2465 crq.request_error_info.len = cpu_to_be32(detail_len); 2466 crq.request_error_info.error_id = err_crq->error_indication.error_id; 2467 2468 rc = ibmvnic_send_crq(adapter, &crq); 2469 if (rc) { 2470 netdev_err(netdev, "failed to request error information\n"); 2471 goto err_info_fail; 2472 } 2473 2474 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2475 netdev_err(netdev, "timeout waiting for error information\n"); 2476 goto err_info_fail; 2477 } 2478 2479 return; 2480 2481 err_info_fail: 2482 spin_lock_irqsave(&adapter->error_list_lock, flags); 2483 list_del(&error_buff->list); 2484 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2485 2486 kfree(error_buff->buff); 2487 kfree(error_buff); 2488 } 2489 2490 static void handle_error_indication(union ibmvnic_crq *crq, 2491 struct ibmvnic_adapter *adapter) 2492 { 2493 struct device *dev = &adapter->vdev->dev; 2494 2495 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 2496 crq->error_indication.flags 2497 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 2498 be32_to_cpu(crq->error_indication.error_id), 2499 be16_to_cpu(crq->error_indication.error_cause)); 2500 2501 if (be32_to_cpu(crq->error_indication.error_id)) 2502 request_error_information(adapter, crq); 2503 } 2504 2505 static void handle_change_mac_rsp(union ibmvnic_crq *crq, 2506 struct ibmvnic_adapter *adapter) 2507 { 2508 struct net_device *netdev = adapter->netdev; 2509 struct device *dev = &adapter->vdev->dev; 2510 long rc; 2511 2512 rc = crq->change_mac_addr_rsp.rc.code; 2513 if (rc) { 2514 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 2515 return; 2516 } 2517 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 2518 ETH_ALEN); 2519 } 2520 2521 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 2522 struct ibmvnic_adapter *adapter) 2523 { 2524 struct device *dev = &adapter->vdev->dev; 2525 u64 *req_value; 2526 char *name; 2527 2528 atomic_dec(&adapter->running_cap_crqs); 2529 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 2530 case REQ_TX_QUEUES: 2531 req_value = &adapter->req_tx_queues; 2532 name = "tx"; 2533 break; 2534 case REQ_RX_QUEUES: 2535 req_value = &adapter->req_rx_queues; 2536 name = "rx"; 2537 break; 2538 case REQ_RX_ADD_QUEUES: 2539 req_value = &adapter->req_rx_add_queues; 2540 name = "rx_add"; 2541 break; 2542 case REQ_TX_ENTRIES_PER_SUBCRQ: 2543 req_value = &adapter->req_tx_entries_per_subcrq; 2544 name = "tx_entries_per_subcrq"; 2545 break; 2546 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 2547 req_value = &adapter->req_rx_add_entries_per_subcrq; 2548 name = "rx_add_entries_per_subcrq"; 2549 break; 2550 case REQ_MTU: 2551 req_value = &adapter->req_mtu; 2552 name = "mtu"; 2553 break; 2554 case PROMISC_REQUESTED: 2555 req_value = &adapter->promisc; 2556 name = "promisc"; 2557 break; 2558 default: 2559 dev_err(dev, "Got invalid cap request rsp %d\n", 2560 crq->request_capability.capability); 2561 return; 2562 } 2563 2564 switch (crq->request_capability_rsp.rc.code) { 2565 case SUCCESS: 2566 break; 2567 case PARTIALSUCCESS: 2568 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 2569 *req_value, 2570 (long int)be64_to_cpu(crq->request_capability_rsp. 2571 number), name); 2572 release_sub_crqs(adapter); 2573 *req_value = be64_to_cpu(crq->request_capability_rsp.number); 2574 ibmvnic_send_req_caps(adapter, 1); 2575 return; 2576 default: 2577 dev_err(dev, "Error %d in request cap rsp\n", 2578 crq->request_capability_rsp.rc.code); 2579 return; 2580 } 2581 2582 /* Done receiving requested capabilities, query IP offload support */ 2583 if (atomic_read(&adapter->running_cap_crqs) == 0) { 2584 union ibmvnic_crq newcrq; 2585 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 2586 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 2587 &adapter->ip_offload_buf; 2588 2589 adapter->wait_capability = false; 2590 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 2591 buf_sz, 2592 DMA_FROM_DEVICE); 2593 2594 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 2595 if (!firmware_has_feature(FW_FEATURE_CMO)) 2596 dev_err(dev, "Couldn't map offload buffer\n"); 2597 return; 2598 } 2599 2600 memset(&newcrq, 0, sizeof(newcrq)); 2601 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 2602 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 2603 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 2604 newcrq.query_ip_offload.ioba = 2605 cpu_to_be32(adapter->ip_offload_tok); 2606 2607 ibmvnic_send_crq(adapter, &newcrq); 2608 } 2609 } 2610 2611 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 2612 struct ibmvnic_adapter *adapter) 2613 { 2614 struct device *dev = &adapter->vdev->dev; 2615 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 2616 struct ibmvnic_login_buffer *login = adapter->login_buf; 2617 int i; 2618 2619 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 2620 DMA_BIDIRECTIONAL); 2621 dma_unmap_single(dev, adapter->login_rsp_buf_token, 2622 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 2623 2624 /* If the number of queues requested can't be allocated by the 2625 * server, the login response will return with code 1. We will need 2626 * to resend the login buffer with fewer queues requested. 2627 */ 2628 if (login_rsp_crq->generic.rc.code) { 2629 adapter->renegotiate = true; 2630 complete(&adapter->init_done); 2631 return 0; 2632 } 2633 2634 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 2635 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 2636 netdev_dbg(adapter->netdev, "%016lx\n", 2637 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 2638 } 2639 2640 /* Sanity checks */ 2641 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 2642 (be32_to_cpu(login->num_rxcomp_subcrqs) * 2643 adapter->req_rx_add_queues != 2644 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 2645 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 2646 ibmvnic_remove(adapter->vdev); 2647 return -EIO; 2648 } 2649 complete(&adapter->init_done); 2650 2651 return 0; 2652 } 2653 2654 static void handle_request_map_rsp(union ibmvnic_crq *crq, 2655 struct ibmvnic_adapter *adapter) 2656 { 2657 struct device *dev = &adapter->vdev->dev; 2658 u8 map_id = crq->request_map_rsp.map_id; 2659 int tx_subcrqs; 2660 int rx_subcrqs; 2661 long rc; 2662 int i; 2663 2664 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 2665 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 2666 2667 rc = crq->request_map_rsp.rc.code; 2668 if (rc) { 2669 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc); 2670 adapter->map_id--; 2671 /* need to find and zero tx/rx_pool map_id */ 2672 for (i = 0; i < tx_subcrqs; i++) { 2673 if (adapter->tx_pool[i].long_term_buff.map_id == map_id) 2674 adapter->tx_pool[i].long_term_buff.map_id = 0; 2675 } 2676 for (i = 0; i < rx_subcrqs; i++) { 2677 if (adapter->rx_pool[i].long_term_buff.map_id == map_id) 2678 adapter->rx_pool[i].long_term_buff.map_id = 0; 2679 } 2680 } 2681 complete(&adapter->fw_done); 2682 } 2683 2684 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 2685 struct ibmvnic_adapter *adapter) 2686 { 2687 struct device *dev = &adapter->vdev->dev; 2688 long rc; 2689 2690 rc = crq->request_unmap_rsp.rc.code; 2691 if (rc) 2692 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 2693 } 2694 2695 static void handle_query_map_rsp(union ibmvnic_crq *crq, 2696 struct ibmvnic_adapter *adapter) 2697 { 2698 struct net_device *netdev = adapter->netdev; 2699 struct device *dev = &adapter->vdev->dev; 2700 long rc; 2701 2702 rc = crq->query_map_rsp.rc.code; 2703 if (rc) { 2704 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 2705 return; 2706 } 2707 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 2708 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 2709 crq->query_map_rsp.free_pages); 2710 } 2711 2712 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 2713 struct ibmvnic_adapter *adapter) 2714 { 2715 struct net_device *netdev = adapter->netdev; 2716 struct device *dev = &adapter->vdev->dev; 2717 long rc; 2718 2719 atomic_dec(&adapter->running_cap_crqs); 2720 netdev_dbg(netdev, "Outstanding queries: %d\n", 2721 atomic_read(&adapter->running_cap_crqs)); 2722 rc = crq->query_capability.rc.code; 2723 if (rc) { 2724 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 2725 goto out; 2726 } 2727 2728 switch (be16_to_cpu(crq->query_capability.capability)) { 2729 case MIN_TX_QUEUES: 2730 adapter->min_tx_queues = 2731 be64_to_cpu(crq->query_capability.number); 2732 netdev_dbg(netdev, "min_tx_queues = %lld\n", 2733 adapter->min_tx_queues); 2734 break; 2735 case MIN_RX_QUEUES: 2736 adapter->min_rx_queues = 2737 be64_to_cpu(crq->query_capability.number); 2738 netdev_dbg(netdev, "min_rx_queues = %lld\n", 2739 adapter->min_rx_queues); 2740 break; 2741 case MIN_RX_ADD_QUEUES: 2742 adapter->min_rx_add_queues = 2743 be64_to_cpu(crq->query_capability.number); 2744 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 2745 adapter->min_rx_add_queues); 2746 break; 2747 case MAX_TX_QUEUES: 2748 adapter->max_tx_queues = 2749 be64_to_cpu(crq->query_capability.number); 2750 netdev_dbg(netdev, "max_tx_queues = %lld\n", 2751 adapter->max_tx_queues); 2752 break; 2753 case MAX_RX_QUEUES: 2754 adapter->max_rx_queues = 2755 be64_to_cpu(crq->query_capability.number); 2756 netdev_dbg(netdev, "max_rx_queues = %lld\n", 2757 adapter->max_rx_queues); 2758 break; 2759 case MAX_RX_ADD_QUEUES: 2760 adapter->max_rx_add_queues = 2761 be64_to_cpu(crq->query_capability.number); 2762 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 2763 adapter->max_rx_add_queues); 2764 break; 2765 case MIN_TX_ENTRIES_PER_SUBCRQ: 2766 adapter->min_tx_entries_per_subcrq = 2767 be64_to_cpu(crq->query_capability.number); 2768 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 2769 adapter->min_tx_entries_per_subcrq); 2770 break; 2771 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 2772 adapter->min_rx_add_entries_per_subcrq = 2773 be64_to_cpu(crq->query_capability.number); 2774 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 2775 adapter->min_rx_add_entries_per_subcrq); 2776 break; 2777 case MAX_TX_ENTRIES_PER_SUBCRQ: 2778 adapter->max_tx_entries_per_subcrq = 2779 be64_to_cpu(crq->query_capability.number); 2780 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 2781 adapter->max_tx_entries_per_subcrq); 2782 break; 2783 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 2784 adapter->max_rx_add_entries_per_subcrq = 2785 be64_to_cpu(crq->query_capability.number); 2786 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 2787 adapter->max_rx_add_entries_per_subcrq); 2788 break; 2789 case TCP_IP_OFFLOAD: 2790 adapter->tcp_ip_offload = 2791 be64_to_cpu(crq->query_capability.number); 2792 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 2793 adapter->tcp_ip_offload); 2794 break; 2795 case PROMISC_SUPPORTED: 2796 adapter->promisc_supported = 2797 be64_to_cpu(crq->query_capability.number); 2798 netdev_dbg(netdev, "promisc_supported = %lld\n", 2799 adapter->promisc_supported); 2800 break; 2801 case MIN_MTU: 2802 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 2803 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 2804 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 2805 break; 2806 case MAX_MTU: 2807 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 2808 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 2809 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 2810 break; 2811 case MAX_MULTICAST_FILTERS: 2812 adapter->max_multicast_filters = 2813 be64_to_cpu(crq->query_capability.number); 2814 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 2815 adapter->max_multicast_filters); 2816 break; 2817 case VLAN_HEADER_INSERTION: 2818 adapter->vlan_header_insertion = 2819 be64_to_cpu(crq->query_capability.number); 2820 if (adapter->vlan_header_insertion) 2821 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 2822 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 2823 adapter->vlan_header_insertion); 2824 break; 2825 case RX_VLAN_HEADER_INSERTION: 2826 adapter->rx_vlan_header_insertion = 2827 be64_to_cpu(crq->query_capability.number); 2828 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 2829 adapter->rx_vlan_header_insertion); 2830 break; 2831 case MAX_TX_SG_ENTRIES: 2832 adapter->max_tx_sg_entries = 2833 be64_to_cpu(crq->query_capability.number); 2834 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 2835 adapter->max_tx_sg_entries); 2836 break; 2837 case RX_SG_SUPPORTED: 2838 adapter->rx_sg_supported = 2839 be64_to_cpu(crq->query_capability.number); 2840 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 2841 adapter->rx_sg_supported); 2842 break; 2843 case OPT_TX_COMP_SUB_QUEUES: 2844 adapter->opt_tx_comp_sub_queues = 2845 be64_to_cpu(crq->query_capability.number); 2846 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 2847 adapter->opt_tx_comp_sub_queues); 2848 break; 2849 case OPT_RX_COMP_QUEUES: 2850 adapter->opt_rx_comp_queues = 2851 be64_to_cpu(crq->query_capability.number); 2852 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 2853 adapter->opt_rx_comp_queues); 2854 break; 2855 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 2856 adapter->opt_rx_bufadd_q_per_rx_comp_q = 2857 be64_to_cpu(crq->query_capability.number); 2858 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 2859 adapter->opt_rx_bufadd_q_per_rx_comp_q); 2860 break; 2861 case OPT_TX_ENTRIES_PER_SUBCRQ: 2862 adapter->opt_tx_entries_per_subcrq = 2863 be64_to_cpu(crq->query_capability.number); 2864 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 2865 adapter->opt_tx_entries_per_subcrq); 2866 break; 2867 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 2868 adapter->opt_rxba_entries_per_subcrq = 2869 be64_to_cpu(crq->query_capability.number); 2870 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 2871 adapter->opt_rxba_entries_per_subcrq); 2872 break; 2873 case TX_RX_DESC_REQ: 2874 adapter->tx_rx_desc_req = crq->query_capability.number; 2875 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 2876 adapter->tx_rx_desc_req); 2877 break; 2878 2879 default: 2880 netdev_err(netdev, "Got invalid cap rsp %d\n", 2881 crq->query_capability.capability); 2882 } 2883 2884 out: 2885 if (atomic_read(&adapter->running_cap_crqs) == 0) { 2886 adapter->wait_capability = false; 2887 ibmvnic_send_req_caps(adapter, 0); 2888 } 2889 } 2890 2891 static void ibmvnic_xport_event(struct work_struct *work) 2892 { 2893 struct ibmvnic_adapter *adapter = container_of(work, 2894 struct ibmvnic_adapter, 2895 ibmvnic_xport); 2896 struct device *dev = &adapter->vdev->dev; 2897 long rc; 2898 2899 release_sub_crqs(adapter); 2900 if (adapter->migrated) { 2901 rc = ibmvnic_reenable_crq_queue(adapter); 2902 if (rc) 2903 dev_err(dev, "Error after enable rc=%ld\n", rc); 2904 adapter->migrated = false; 2905 rc = ibmvnic_send_crq_init(adapter); 2906 if (rc) 2907 dev_err(dev, "Error sending init rc=%ld\n", rc); 2908 } 2909 } 2910 2911 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 2912 struct ibmvnic_adapter *adapter) 2913 { 2914 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 2915 struct net_device *netdev = adapter->netdev; 2916 struct device *dev = &adapter->vdev->dev; 2917 u64 *u64_crq = (u64 *)crq; 2918 long rc; 2919 2920 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 2921 (unsigned long int)cpu_to_be64(u64_crq[0]), 2922 (unsigned long int)cpu_to_be64(u64_crq[1])); 2923 switch (gen_crq->first) { 2924 case IBMVNIC_CRQ_INIT_RSP: 2925 switch (gen_crq->cmd) { 2926 case IBMVNIC_CRQ_INIT: 2927 dev_info(dev, "Partner initialized\n"); 2928 /* Send back a response */ 2929 rc = ibmvnic_send_crq_init_complete(adapter); 2930 if (!rc) 2931 schedule_work(&adapter->vnic_crq_init); 2932 else 2933 dev_err(dev, "Can't send initrsp rc=%ld\n", rc); 2934 break; 2935 case IBMVNIC_CRQ_INIT_COMPLETE: 2936 dev_info(dev, "Partner initialization complete\n"); 2937 send_version_xchg(adapter); 2938 break; 2939 default: 2940 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 2941 } 2942 return; 2943 case IBMVNIC_CRQ_XPORT_EVENT: 2944 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 2945 dev_info(dev, "Re-enabling adapter\n"); 2946 adapter->migrated = true; 2947 schedule_work(&adapter->ibmvnic_xport); 2948 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 2949 dev_info(dev, "Backing device failover detected\n"); 2950 netif_carrier_off(netdev); 2951 adapter->failover = true; 2952 } else { 2953 /* The adapter lost the connection */ 2954 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 2955 gen_crq->cmd); 2956 schedule_work(&adapter->ibmvnic_xport); 2957 } 2958 return; 2959 case IBMVNIC_CRQ_CMD_RSP: 2960 break; 2961 default: 2962 dev_err(dev, "Got an invalid msg type 0x%02x\n", 2963 gen_crq->first); 2964 return; 2965 } 2966 2967 switch (gen_crq->cmd) { 2968 case VERSION_EXCHANGE_RSP: 2969 rc = crq->version_exchange_rsp.rc.code; 2970 if (rc) { 2971 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 2972 break; 2973 } 2974 dev_info(dev, "Partner protocol version is %d\n", 2975 crq->version_exchange_rsp.version); 2976 if (be16_to_cpu(crq->version_exchange_rsp.version) < 2977 ibmvnic_version) 2978 ibmvnic_version = 2979 be16_to_cpu(crq->version_exchange_rsp.version); 2980 send_cap_queries(adapter); 2981 break; 2982 case QUERY_CAPABILITY_RSP: 2983 handle_query_cap_rsp(crq, adapter); 2984 break; 2985 case QUERY_MAP_RSP: 2986 handle_query_map_rsp(crq, adapter); 2987 break; 2988 case REQUEST_MAP_RSP: 2989 handle_request_map_rsp(crq, adapter); 2990 break; 2991 case REQUEST_UNMAP_RSP: 2992 handle_request_unmap_rsp(crq, adapter); 2993 break; 2994 case REQUEST_CAPABILITY_RSP: 2995 handle_request_cap_rsp(crq, adapter); 2996 break; 2997 case LOGIN_RSP: 2998 netdev_dbg(netdev, "Got Login Response\n"); 2999 handle_login_rsp(crq, adapter); 3000 break; 3001 case LOGICAL_LINK_STATE_RSP: 3002 netdev_dbg(netdev, 3003 "Got Logical Link State Response, state: %d rc: %d\n", 3004 crq->logical_link_state_rsp.link_state, 3005 crq->logical_link_state_rsp.rc.code); 3006 adapter->logical_link_state = 3007 crq->logical_link_state_rsp.link_state; 3008 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 3009 complete(&adapter->init_done); 3010 break; 3011 case LINK_STATE_INDICATION: 3012 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 3013 adapter->phys_link_state = 3014 crq->link_state_indication.phys_link_state; 3015 adapter->logical_link_state = 3016 crq->link_state_indication.logical_link_state; 3017 break; 3018 case CHANGE_MAC_ADDR_RSP: 3019 netdev_dbg(netdev, "Got MAC address change Response\n"); 3020 handle_change_mac_rsp(crq, adapter); 3021 break; 3022 case ERROR_INDICATION: 3023 netdev_dbg(netdev, "Got Error Indication\n"); 3024 handle_error_indication(crq, adapter); 3025 break; 3026 case REQUEST_ERROR_RSP: 3027 netdev_dbg(netdev, "Got Error Detail Response\n"); 3028 handle_error_info_rsp(crq, adapter); 3029 break; 3030 case REQUEST_STATISTICS_RSP: 3031 netdev_dbg(netdev, "Got Statistics Response\n"); 3032 complete(&adapter->stats_done); 3033 break; 3034 case QUERY_IP_OFFLOAD_RSP: 3035 netdev_dbg(netdev, "Got Query IP offload Response\n"); 3036 handle_query_ip_offload_rsp(adapter); 3037 break; 3038 case MULTICAST_CTRL_RSP: 3039 netdev_dbg(netdev, "Got multicast control Response\n"); 3040 break; 3041 case CONTROL_IP_OFFLOAD_RSP: 3042 netdev_dbg(netdev, "Got Control IP offload Response\n"); 3043 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 3044 sizeof(adapter->ip_offload_ctrl), 3045 DMA_TO_DEVICE); 3046 complete(&adapter->init_done); 3047 break; 3048 case COLLECT_FW_TRACE_RSP: 3049 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 3050 complete(&adapter->fw_done); 3051 break; 3052 default: 3053 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 3054 gen_crq->cmd); 3055 } 3056 } 3057 3058 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 3059 { 3060 struct ibmvnic_adapter *adapter = instance; 3061 3062 tasklet_schedule(&adapter->tasklet); 3063 return IRQ_HANDLED; 3064 } 3065 3066 static void ibmvnic_tasklet(void *data) 3067 { 3068 struct ibmvnic_adapter *adapter = data; 3069 struct ibmvnic_crq_queue *queue = &adapter->crq; 3070 union ibmvnic_crq *crq; 3071 unsigned long flags; 3072 bool done = false; 3073 3074 spin_lock_irqsave(&queue->lock, flags); 3075 while (!done) { 3076 /* Pull all the valid messages off the CRQ */ 3077 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 3078 ibmvnic_handle_crq(crq, adapter); 3079 crq->generic.first = 0; 3080 } 3081 3082 /* remain in tasklet until all 3083 * capabilities responses are received 3084 */ 3085 if (!adapter->wait_capability) 3086 done = true; 3087 } 3088 /* if capabilities CRQ's were sent in this tasklet, the following 3089 * tasklet must wait until all responses are received 3090 */ 3091 if (atomic_read(&adapter->running_cap_crqs) != 0) 3092 adapter->wait_capability = true; 3093 spin_unlock_irqrestore(&queue->lock, flags); 3094 } 3095 3096 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 3097 { 3098 struct vio_dev *vdev = adapter->vdev; 3099 int rc; 3100 3101 do { 3102 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 3103 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3104 3105 if (rc) 3106 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 3107 3108 return rc; 3109 } 3110 3111 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 3112 { 3113 struct ibmvnic_crq_queue *crq = &adapter->crq; 3114 struct device *dev = &adapter->vdev->dev; 3115 struct vio_dev *vdev = adapter->vdev; 3116 int rc; 3117 3118 /* Close the CRQ */ 3119 do { 3120 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3121 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3122 3123 /* Clean out the queue */ 3124 memset(crq->msgs, 0, PAGE_SIZE); 3125 crq->cur = 0; 3126 3127 /* And re-open it again */ 3128 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3129 crq->msg_token, PAGE_SIZE); 3130 3131 if (rc == H_CLOSED) 3132 /* Adapter is good, but other end is not ready */ 3133 dev_warn(dev, "Partner adapter not ready\n"); 3134 else if (rc != 0) 3135 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 3136 3137 return rc; 3138 } 3139 3140 static void release_crq_queue(struct ibmvnic_adapter *adapter) 3141 { 3142 struct ibmvnic_crq_queue *crq = &adapter->crq; 3143 struct vio_dev *vdev = adapter->vdev; 3144 long rc; 3145 3146 if (!crq->msgs) 3147 return; 3148 3149 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 3150 free_irq(vdev->irq, adapter); 3151 tasklet_kill(&adapter->tasklet); 3152 do { 3153 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3154 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3155 3156 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 3157 DMA_BIDIRECTIONAL); 3158 free_page((unsigned long)crq->msgs); 3159 crq->msgs = NULL; 3160 } 3161 3162 static int init_crq_queue(struct ibmvnic_adapter *adapter) 3163 { 3164 struct ibmvnic_crq_queue *crq = &adapter->crq; 3165 struct device *dev = &adapter->vdev->dev; 3166 struct vio_dev *vdev = adapter->vdev; 3167 int rc, retrc = -ENOMEM; 3168 3169 if (crq->msgs) 3170 return 0; 3171 3172 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 3173 /* Should we allocate more than one page? */ 3174 3175 if (!crq->msgs) 3176 return -ENOMEM; 3177 3178 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3179 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 3180 DMA_BIDIRECTIONAL); 3181 if (dma_mapping_error(dev, crq->msg_token)) 3182 goto map_failed; 3183 3184 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3185 crq->msg_token, PAGE_SIZE); 3186 3187 if (rc == H_RESOURCE) 3188 /* maybe kexecing and resource is busy. try a reset */ 3189 rc = ibmvnic_reset_crq(adapter); 3190 retrc = rc; 3191 3192 if (rc == H_CLOSED) { 3193 dev_warn(dev, "Partner adapter not ready\n"); 3194 } else if (rc) { 3195 dev_warn(dev, "Error %d opening adapter\n", rc); 3196 goto reg_crq_failed; 3197 } 3198 3199 retrc = 0; 3200 3201 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 3202 (unsigned long)adapter); 3203 3204 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 3205 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 3206 adapter); 3207 if (rc) { 3208 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 3209 vdev->irq, rc); 3210 goto req_irq_failed; 3211 } 3212 3213 rc = vio_enable_interrupts(vdev); 3214 if (rc) { 3215 dev_err(dev, "Error %d enabling interrupts\n", rc); 3216 goto req_irq_failed; 3217 } 3218 3219 crq->cur = 0; 3220 spin_lock_init(&crq->lock); 3221 3222 return retrc; 3223 3224 req_irq_failed: 3225 tasklet_kill(&adapter->tasklet); 3226 do { 3227 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3228 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3229 reg_crq_failed: 3230 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3231 map_failed: 3232 free_page((unsigned long)crq->msgs); 3233 crq->msgs = NULL; 3234 return retrc; 3235 } 3236 3237 static void handle_crq_init_rsp(struct work_struct *work) 3238 { 3239 struct ibmvnic_adapter *adapter = container_of(work, 3240 struct ibmvnic_adapter, 3241 vnic_crq_init); 3242 struct device *dev = &adapter->vdev->dev; 3243 struct net_device *netdev = adapter->netdev; 3244 unsigned long timeout = msecs_to_jiffies(30000); 3245 bool restart = false; 3246 int rc; 3247 3248 if (adapter->failover) { 3249 release_sub_crqs(adapter); 3250 if (netif_running(netdev)) { 3251 netif_tx_disable(netdev); 3252 ibmvnic_close(netdev); 3253 restart = true; 3254 } 3255 } 3256 3257 reinit_completion(&adapter->init_done); 3258 send_version_xchg(adapter); 3259 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3260 dev_err(dev, "Passive init timeout\n"); 3261 goto task_failed; 3262 } 3263 3264 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3265 3266 if (adapter->failover) { 3267 adapter->failover = false; 3268 if (restart) { 3269 rc = ibmvnic_open(netdev); 3270 if (rc) 3271 goto restart_failed; 3272 } 3273 netif_carrier_on(netdev); 3274 return; 3275 } 3276 3277 rc = register_netdev(netdev); 3278 if (rc) { 3279 dev_err(dev, 3280 "failed to register netdev rc=%d\n", rc); 3281 goto register_failed; 3282 } 3283 dev_info(dev, "ibmvnic registered\n"); 3284 3285 return; 3286 3287 restart_failed: 3288 dev_err(dev, "Failed to restart ibmvnic, rc=%d\n", rc); 3289 register_failed: 3290 release_sub_crqs(adapter); 3291 task_failed: 3292 dev_err(dev, "Passive initialization was not successful\n"); 3293 } 3294 3295 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 3296 { 3297 struct device *dev = &adapter->vdev->dev; 3298 unsigned long timeout = msecs_to_jiffies(30000); 3299 int rc; 3300 3301 rc = init_crq_queue(adapter); 3302 if (rc) { 3303 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 3304 return rc; 3305 } 3306 3307 init_completion(&adapter->init_done); 3308 ibmvnic_send_crq_init(adapter); 3309 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3310 dev_err(dev, "Initialization sequence timed out\n"); 3311 release_crq_queue(adapter); 3312 return -1; 3313 } 3314 3315 rc = init_sub_crqs(adapter); 3316 if (rc) { 3317 dev_err(dev, "Initialization of sub crqs failed\n"); 3318 release_crq_queue(adapter); 3319 } 3320 3321 return rc; 3322 } 3323 3324 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 3325 { 3326 struct ibmvnic_adapter *adapter; 3327 struct net_device *netdev; 3328 unsigned char *mac_addr_p; 3329 int rc; 3330 3331 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 3332 dev->unit_address); 3333 3334 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 3335 VETH_MAC_ADDR, NULL); 3336 if (!mac_addr_p) { 3337 dev_err(&dev->dev, 3338 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 3339 __FILE__, __LINE__); 3340 return 0; 3341 } 3342 3343 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 3344 IBMVNIC_MAX_TX_QUEUES); 3345 if (!netdev) 3346 return -ENOMEM; 3347 3348 adapter = netdev_priv(netdev); 3349 dev_set_drvdata(&dev->dev, netdev); 3350 adapter->vdev = dev; 3351 adapter->netdev = netdev; 3352 adapter->failover = false; 3353 3354 ether_addr_copy(adapter->mac_addr, mac_addr_p); 3355 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 3356 netdev->irq = dev->irq; 3357 netdev->netdev_ops = &ibmvnic_netdev_ops; 3358 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 3359 SET_NETDEV_DEV(netdev, &dev->dev); 3360 3361 INIT_WORK(&adapter->vnic_crq_init, handle_crq_init_rsp); 3362 INIT_WORK(&adapter->ibmvnic_xport, ibmvnic_xport_event); 3363 3364 spin_lock_init(&adapter->stats_lock); 3365 3366 INIT_LIST_HEAD(&adapter->errors); 3367 spin_lock_init(&adapter->error_list_lock); 3368 3369 rc = ibmvnic_init(adapter); 3370 if (rc) { 3371 free_netdev(netdev); 3372 return rc; 3373 } 3374 3375 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3376 adapter->is_closed = false; 3377 3378 rc = register_netdev(netdev); 3379 if (rc) { 3380 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 3381 free_netdev(netdev); 3382 return rc; 3383 } 3384 dev_info(&dev->dev, "ibmvnic registered\n"); 3385 3386 return 0; 3387 } 3388 3389 static int ibmvnic_remove(struct vio_dev *dev) 3390 { 3391 struct net_device *netdev = dev_get_drvdata(&dev->dev); 3392 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3393 3394 unregister_netdev(netdev); 3395 3396 release_resources(adapter); 3397 release_sub_crqs(adapter); 3398 release_crq_queue(adapter); 3399 3400 free_netdev(netdev); 3401 dev_set_drvdata(&dev->dev, NULL); 3402 3403 return 0; 3404 } 3405 3406 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 3407 { 3408 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 3409 struct ibmvnic_adapter *adapter; 3410 struct iommu_table *tbl; 3411 unsigned long ret = 0; 3412 int i; 3413 3414 tbl = get_iommu_table_base(&vdev->dev); 3415 3416 /* netdev inits at probe time along with the structures we need below*/ 3417 if (!netdev) 3418 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 3419 3420 adapter = netdev_priv(netdev); 3421 3422 ret += PAGE_SIZE; /* the crq message queue */ 3423 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 3424 3425 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 3426 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 3427 3428 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 3429 i++) 3430 ret += adapter->rx_pool[i].size * 3431 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 3432 3433 return ret; 3434 } 3435 3436 static int ibmvnic_resume(struct device *dev) 3437 { 3438 struct net_device *netdev = dev_get_drvdata(dev); 3439 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3440 int i; 3441 3442 /* kick the interrupt handlers just in case we lost an interrupt */ 3443 for (i = 0; i < adapter->req_rx_queues; i++) 3444 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 3445 adapter->rx_scrq[i]); 3446 3447 return 0; 3448 } 3449 3450 static struct vio_device_id ibmvnic_device_table[] = { 3451 {"network", "IBM,vnic"}, 3452 {"", "" } 3453 }; 3454 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 3455 3456 static const struct dev_pm_ops ibmvnic_pm_ops = { 3457 .resume = ibmvnic_resume 3458 }; 3459 3460 static struct vio_driver ibmvnic_driver = { 3461 .id_table = ibmvnic_device_table, 3462 .probe = ibmvnic_probe, 3463 .remove = ibmvnic_remove, 3464 .get_desired_dma = ibmvnic_get_desired_dma, 3465 .name = ibmvnic_driver_name, 3466 .pm = &ibmvnic_pm_ops, 3467 }; 3468 3469 /* module functions */ 3470 static int __init ibmvnic_module_init(void) 3471 { 3472 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 3473 IBMVNIC_DRIVER_VERSION); 3474 3475 return vio_register_driver(&ibmvnic_driver); 3476 } 3477 3478 static void __exit ibmvnic_module_exit(void) 3479 { 3480 vio_unregister_driver(&ibmvnic_driver); 3481 } 3482 3483 module_init(ibmvnic_module_init); 3484 module_exit(ibmvnic_module_exit); 3485