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->reset_reason != VNIC_RESET_FAILOVER && 198 adapter->reset_reason != VNIC_RESET_MOBILITY) 199 send_request_unmap(adapter, ltb->map_id); 200 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 201 } 202 203 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 204 struct ibmvnic_rx_pool *pool) 205 { 206 int count = pool->size - atomic_read(&pool->available); 207 struct device *dev = &adapter->vdev->dev; 208 int buffers_added = 0; 209 unsigned long lpar_rc; 210 union sub_crq sub_crq; 211 struct sk_buff *skb; 212 unsigned int offset; 213 dma_addr_t dma_addr; 214 unsigned char *dst; 215 u64 *handle_array; 216 int shift = 0; 217 int index; 218 int i; 219 220 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 221 be32_to_cpu(adapter->login_rsp_buf-> 222 off_rxadd_subcrqs)); 223 224 for (i = 0; i < count; ++i) { 225 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 226 if (!skb) { 227 dev_err(dev, "Couldn't replenish rx buff\n"); 228 adapter->replenish_no_mem++; 229 break; 230 } 231 232 index = pool->free_map[pool->next_free]; 233 234 if (pool->rx_buff[index].skb) 235 dev_err(dev, "Inconsistent free_map!\n"); 236 237 /* Copy the skb to the long term mapped DMA buffer */ 238 offset = index * pool->buff_size; 239 dst = pool->long_term_buff.buff + offset; 240 memset(dst, 0, pool->buff_size); 241 dma_addr = pool->long_term_buff.addr + offset; 242 pool->rx_buff[index].data = dst; 243 244 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 245 pool->rx_buff[index].dma = dma_addr; 246 pool->rx_buff[index].skb = skb; 247 pool->rx_buff[index].pool_index = pool->index; 248 pool->rx_buff[index].size = pool->buff_size; 249 250 memset(&sub_crq, 0, sizeof(sub_crq)); 251 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 252 sub_crq.rx_add.correlator = 253 cpu_to_be64((u64)&pool->rx_buff[index]); 254 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 255 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 256 257 /* The length field of the sCRQ is defined to be 24 bits so the 258 * buffer size needs to be left shifted by a byte before it is 259 * converted to big endian to prevent the last byte from being 260 * truncated. 261 */ 262 #ifdef __LITTLE_ENDIAN__ 263 shift = 8; 264 #endif 265 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 266 267 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 268 &sub_crq); 269 if (lpar_rc != H_SUCCESS) 270 goto failure; 271 272 buffers_added++; 273 adapter->replenish_add_buff_success++; 274 pool->next_free = (pool->next_free + 1) % pool->size; 275 } 276 atomic_add(buffers_added, &pool->available); 277 return; 278 279 failure: 280 dev_info(dev, "replenish pools failure\n"); 281 pool->free_map[pool->next_free] = index; 282 pool->rx_buff[index].skb = NULL; 283 if (!dma_mapping_error(dev, dma_addr)) 284 dma_unmap_single(dev, dma_addr, pool->buff_size, 285 DMA_FROM_DEVICE); 286 287 dev_kfree_skb_any(skb); 288 adapter->replenish_add_buff_failure++; 289 atomic_add(buffers_added, &pool->available); 290 } 291 292 static void replenish_pools(struct ibmvnic_adapter *adapter) 293 { 294 int i; 295 296 adapter->replenish_task_cycles++; 297 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 298 i++) { 299 if (adapter->rx_pool[i].active) 300 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 301 } 302 } 303 304 static void release_stats_token(struct ibmvnic_adapter *adapter) 305 { 306 struct device *dev = &adapter->vdev->dev; 307 308 if (!adapter->stats_token) 309 return; 310 311 dma_unmap_single(dev, adapter->stats_token, 312 sizeof(struct ibmvnic_statistics), 313 DMA_FROM_DEVICE); 314 adapter->stats_token = 0; 315 } 316 317 static int init_stats_token(struct ibmvnic_adapter *adapter) 318 { 319 struct device *dev = &adapter->vdev->dev; 320 dma_addr_t stok; 321 322 stok = dma_map_single(dev, &adapter->stats, 323 sizeof(struct ibmvnic_statistics), 324 DMA_FROM_DEVICE); 325 if (dma_mapping_error(dev, stok)) { 326 dev_err(dev, "Couldn't map stats buffer\n"); 327 return -1; 328 } 329 330 adapter->stats_token = stok; 331 return 0; 332 } 333 334 static void release_rx_pools(struct ibmvnic_adapter *adapter) 335 { 336 struct ibmvnic_rx_pool *rx_pool; 337 int rx_scrqs; 338 int i, j; 339 340 if (!adapter->rx_pool) 341 return; 342 343 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 344 for (i = 0; i < rx_scrqs; i++) { 345 rx_pool = &adapter->rx_pool[i]; 346 347 kfree(rx_pool->free_map); 348 free_long_term_buff(adapter, &rx_pool->long_term_buff); 349 350 if (!rx_pool->rx_buff) 351 continue; 352 353 for (j = 0; j < rx_pool->size; j++) { 354 if (rx_pool->rx_buff[j].skb) { 355 dev_kfree_skb_any(rx_pool->rx_buff[i].skb); 356 rx_pool->rx_buff[i].skb = NULL; 357 } 358 } 359 360 kfree(rx_pool->rx_buff); 361 } 362 363 kfree(adapter->rx_pool); 364 adapter->rx_pool = NULL; 365 } 366 367 static int init_rx_pools(struct net_device *netdev) 368 { 369 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 370 struct device *dev = &adapter->vdev->dev; 371 struct ibmvnic_rx_pool *rx_pool; 372 int rxadd_subcrqs; 373 u64 *size_array; 374 int i, j; 375 376 rxadd_subcrqs = 377 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 378 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 379 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 380 381 adapter->rx_pool = kcalloc(rxadd_subcrqs, 382 sizeof(struct ibmvnic_rx_pool), 383 GFP_KERNEL); 384 if (!adapter->rx_pool) { 385 dev_err(dev, "Failed to allocate rx pools\n"); 386 return -1; 387 } 388 389 for (i = 0; i < rxadd_subcrqs; i++) { 390 rx_pool = &adapter->rx_pool[i]; 391 392 netdev_dbg(adapter->netdev, 393 "Initializing rx_pool %d, %lld buffs, %lld bytes each\n", 394 i, adapter->req_rx_add_entries_per_subcrq, 395 be64_to_cpu(size_array[i])); 396 397 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 398 rx_pool->index = i; 399 rx_pool->buff_size = be64_to_cpu(size_array[i]); 400 rx_pool->active = 1; 401 402 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 403 GFP_KERNEL); 404 if (!rx_pool->free_map) { 405 release_rx_pools(adapter); 406 return -1; 407 } 408 409 rx_pool->rx_buff = kcalloc(rx_pool->size, 410 sizeof(struct ibmvnic_rx_buff), 411 GFP_KERNEL); 412 if (!rx_pool->rx_buff) { 413 dev_err(dev, "Couldn't alloc rx buffers\n"); 414 release_rx_pools(adapter); 415 return -1; 416 } 417 418 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 419 rx_pool->size * rx_pool->buff_size)) { 420 release_rx_pools(adapter); 421 return -1; 422 } 423 424 for (j = 0; j < rx_pool->size; ++j) 425 rx_pool->free_map[j] = j; 426 427 atomic_set(&rx_pool->available, 0); 428 rx_pool->next_alloc = 0; 429 rx_pool->next_free = 0; 430 } 431 432 return 0; 433 } 434 435 static void release_tx_pools(struct ibmvnic_adapter *adapter) 436 { 437 struct ibmvnic_tx_pool *tx_pool; 438 int i, tx_scrqs; 439 440 if (!adapter->tx_pool) 441 return; 442 443 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 444 for (i = 0; i < tx_scrqs; i++) { 445 tx_pool = &adapter->tx_pool[i]; 446 kfree(tx_pool->tx_buff); 447 free_long_term_buff(adapter, &tx_pool->long_term_buff); 448 kfree(tx_pool->free_map); 449 } 450 451 kfree(adapter->tx_pool); 452 adapter->tx_pool = NULL; 453 } 454 455 static int init_tx_pools(struct net_device *netdev) 456 { 457 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 458 struct device *dev = &adapter->vdev->dev; 459 struct ibmvnic_tx_pool *tx_pool; 460 int tx_subcrqs; 461 int i, j; 462 463 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 464 adapter->tx_pool = kcalloc(tx_subcrqs, 465 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 466 if (!adapter->tx_pool) 467 return -1; 468 469 for (i = 0; i < tx_subcrqs; i++) { 470 tx_pool = &adapter->tx_pool[i]; 471 tx_pool->tx_buff = kcalloc(adapter->req_tx_entries_per_subcrq, 472 sizeof(struct ibmvnic_tx_buff), 473 GFP_KERNEL); 474 if (!tx_pool->tx_buff) { 475 dev_err(dev, "tx pool buffer allocation failed\n"); 476 release_tx_pools(adapter); 477 return -1; 478 } 479 480 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 481 adapter->req_tx_entries_per_subcrq * 482 adapter->req_mtu)) { 483 release_tx_pools(adapter); 484 return -1; 485 } 486 487 tx_pool->free_map = kcalloc(adapter->req_tx_entries_per_subcrq, 488 sizeof(int), GFP_KERNEL); 489 if (!tx_pool->free_map) { 490 release_tx_pools(adapter); 491 return -1; 492 } 493 494 for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) 495 tx_pool->free_map[j] = j; 496 497 tx_pool->consumer_index = 0; 498 tx_pool->producer_index = 0; 499 } 500 501 return 0; 502 } 503 504 static void release_error_buffers(struct ibmvnic_adapter *adapter) 505 { 506 struct device *dev = &adapter->vdev->dev; 507 struct ibmvnic_error_buff *error_buff, *tmp; 508 unsigned long flags; 509 510 spin_lock_irqsave(&adapter->error_list_lock, flags); 511 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) { 512 list_del(&error_buff->list); 513 dma_unmap_single(dev, error_buff->dma, error_buff->len, 514 DMA_FROM_DEVICE); 515 kfree(error_buff->buff); 516 kfree(error_buff); 517 } 518 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 519 } 520 521 static int ibmvnic_login(struct net_device *netdev) 522 { 523 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 524 unsigned long timeout = msecs_to_jiffies(30000); 525 struct device *dev = &adapter->vdev->dev; 526 527 do { 528 if (adapter->renegotiate) { 529 adapter->renegotiate = false; 530 release_sub_crqs(adapter); 531 532 reinit_completion(&adapter->init_done); 533 send_cap_queries(adapter); 534 if (!wait_for_completion_timeout(&adapter->init_done, 535 timeout)) { 536 dev_err(dev, "Capabilities query timeout\n"); 537 return -1; 538 } 539 } 540 541 reinit_completion(&adapter->init_done); 542 send_login(adapter); 543 if (!wait_for_completion_timeout(&adapter->init_done, 544 timeout)) { 545 dev_err(dev, "Login timeout\n"); 546 return -1; 547 } 548 } while (adapter->renegotiate); 549 550 return 0; 551 } 552 553 static void release_resources(struct ibmvnic_adapter *adapter) 554 { 555 int i; 556 557 release_tx_pools(adapter); 558 release_rx_pools(adapter); 559 560 release_stats_token(adapter); 561 release_error_buffers(adapter); 562 563 if (adapter->napi) { 564 for (i = 0; i < adapter->req_rx_queues; i++) { 565 if (&adapter->napi[i]) 566 netif_napi_del(&adapter->napi[i]); 567 } 568 } 569 } 570 571 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 572 { 573 struct net_device *netdev = adapter->netdev; 574 unsigned long timeout = msecs_to_jiffies(30000); 575 union ibmvnic_crq crq; 576 bool resend; 577 int rc; 578 579 netdev_err(netdev, "setting link state %d\n", link_state); 580 memset(&crq, 0, sizeof(crq)); 581 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 582 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 583 crq.logical_link_state.link_state = link_state; 584 585 do { 586 resend = false; 587 588 reinit_completion(&adapter->init_done); 589 rc = ibmvnic_send_crq(adapter, &crq); 590 if (rc) { 591 netdev_err(netdev, "Failed to set link state\n"); 592 return rc; 593 } 594 595 if (!wait_for_completion_timeout(&adapter->init_done, 596 timeout)) { 597 netdev_err(netdev, "timeout setting link state\n"); 598 return -1; 599 } 600 601 if (adapter->init_done_rc == 1) { 602 /* Partuial success, delay and re-send */ 603 mdelay(1000); 604 resend = true; 605 } 606 } while (resend); 607 608 return 0; 609 } 610 611 static int set_real_num_queues(struct net_device *netdev) 612 { 613 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 614 int rc; 615 616 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 617 if (rc) { 618 netdev_err(netdev, "failed to set the number of tx queues\n"); 619 return rc; 620 } 621 622 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 623 if (rc) 624 netdev_err(netdev, "failed to set the number of rx queues\n"); 625 626 return rc; 627 } 628 629 static int init_resources(struct ibmvnic_adapter *adapter) 630 { 631 struct net_device *netdev = adapter->netdev; 632 int i, rc; 633 634 rc = set_real_num_queues(netdev); 635 if (rc) 636 return rc; 637 638 rc = init_sub_crq_irqs(adapter); 639 if (rc) { 640 netdev_err(netdev, "failed to initialize sub crq irqs\n"); 641 return -1; 642 } 643 644 rc = init_stats_token(adapter); 645 if (rc) 646 return rc; 647 648 adapter->map_id = 1; 649 adapter->napi = kcalloc(adapter->req_rx_queues, 650 sizeof(struct napi_struct), GFP_KERNEL); 651 if (!adapter->napi) 652 return -ENOMEM; 653 654 for (i = 0; i < adapter->req_rx_queues; i++) { 655 netif_napi_add(netdev, &adapter->napi[i], ibmvnic_poll, 656 NAPI_POLL_WEIGHT); 657 } 658 659 send_map_query(adapter); 660 661 rc = init_rx_pools(netdev); 662 if (rc) 663 return rc; 664 665 rc = init_tx_pools(netdev); 666 return rc; 667 } 668 669 static int __ibmvnic_open(struct net_device *netdev) 670 { 671 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 672 enum vnic_state prev_state = adapter->state; 673 int i, rc; 674 675 adapter->state = VNIC_OPENING; 676 replenish_pools(adapter); 677 678 for (i = 0; i < adapter->req_rx_queues; i++) 679 napi_enable(&adapter->napi[i]); 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 if (prev_state == VNIC_CLOSED) 686 enable_irq(adapter->rx_scrq[i]->irq); 687 else 688 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 689 } 690 691 for (i = 0; i < adapter->req_tx_queues; i++) { 692 if (prev_state == VNIC_CLOSED) 693 enable_irq(adapter->tx_scrq[i]->irq); 694 else 695 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 696 } 697 698 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 699 if (rc) { 700 for (i = 0; i < adapter->req_rx_queues; i++) 701 napi_disable(&adapter->napi[i]); 702 release_resources(adapter); 703 return rc; 704 } 705 706 netif_tx_start_all_queues(netdev); 707 708 if (prev_state == VNIC_CLOSED) { 709 for (i = 0; i < adapter->req_rx_queues; i++) 710 napi_schedule(&adapter->napi[i]); 711 } 712 713 adapter->state = VNIC_OPEN; 714 return rc; 715 } 716 717 static int ibmvnic_open(struct net_device *netdev) 718 { 719 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 720 int rc; 721 722 mutex_lock(&adapter->reset_lock); 723 724 if (adapter->state != VNIC_CLOSED) { 725 rc = ibmvnic_login(netdev); 726 if (rc) { 727 mutex_unlock(&adapter->reset_lock); 728 return rc; 729 } 730 731 rc = init_resources(adapter); 732 if (rc) { 733 netdev_err(netdev, "failed to initialize resources\n"); 734 release_resources(adapter); 735 mutex_unlock(&adapter->reset_lock); 736 return rc; 737 } 738 } 739 740 rc = __ibmvnic_open(netdev); 741 mutex_unlock(&adapter->reset_lock); 742 743 return rc; 744 } 745 746 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 747 { 748 struct ibmvnic_tx_pool *tx_pool; 749 u64 tx_entries; 750 int tx_scrqs; 751 int i, j; 752 753 if (!adapter->tx_pool) 754 return; 755 756 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 757 tx_entries = adapter->req_tx_entries_per_subcrq; 758 759 /* Free any remaining skbs in the tx buffer pools */ 760 for (i = 0; i < tx_scrqs; i++) { 761 tx_pool = &adapter->tx_pool[i]; 762 if (!tx_pool) 763 continue; 764 765 for (j = 0; j < tx_entries; j++) { 766 if (tx_pool->tx_buff[j].skb) { 767 dev_kfree_skb_any(tx_pool->tx_buff[j].skb); 768 tx_pool->tx_buff[j].skb = NULL; 769 } 770 } 771 } 772 } 773 774 static int __ibmvnic_close(struct net_device *netdev) 775 { 776 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 777 int rc = 0; 778 int i; 779 780 adapter->state = VNIC_CLOSING; 781 netif_tx_stop_all_queues(netdev); 782 783 if (adapter->napi) { 784 for (i = 0; i < adapter->req_rx_queues; i++) 785 napi_disable(&adapter->napi[i]); 786 } 787 788 clean_tx_pools(adapter); 789 790 if (adapter->tx_scrq) { 791 for (i = 0; i < adapter->req_tx_queues; i++) 792 if (adapter->tx_scrq[i]->irq) 793 disable_irq(adapter->tx_scrq[i]->irq); 794 } 795 796 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 797 if (rc) 798 return rc; 799 800 if (adapter->rx_scrq) { 801 for (i = 0; i < adapter->req_rx_queues; i++) { 802 int retries = 10; 803 804 while (pending_scrq(adapter, adapter->rx_scrq[i])) { 805 retries--; 806 mdelay(100); 807 808 if (retries == 0) 809 break; 810 } 811 812 if (adapter->rx_scrq[i]->irq) 813 disable_irq(adapter->rx_scrq[i]->irq); 814 } 815 } 816 817 adapter->state = VNIC_CLOSED; 818 return rc; 819 } 820 821 static int ibmvnic_close(struct net_device *netdev) 822 { 823 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 824 int rc; 825 826 mutex_lock(&adapter->reset_lock); 827 rc = __ibmvnic_close(netdev); 828 mutex_unlock(&adapter->reset_lock); 829 830 return rc; 831 } 832 833 /** 834 * build_hdr_data - creates L2/L3/L4 header data buffer 835 * @hdr_field - bitfield determining needed headers 836 * @skb - socket buffer 837 * @hdr_len - array of header lengths 838 * @tot_len - total length of data 839 * 840 * Reads hdr_field to determine which headers are needed by firmware. 841 * Builds a buffer containing these headers. Saves individual header 842 * lengths and total buffer length to be used to build descriptors. 843 */ 844 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 845 int *hdr_len, u8 *hdr_data) 846 { 847 int len = 0; 848 u8 *hdr; 849 850 hdr_len[0] = sizeof(struct ethhdr); 851 852 if (skb->protocol == htons(ETH_P_IP)) { 853 hdr_len[1] = ip_hdr(skb)->ihl * 4; 854 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 855 hdr_len[2] = tcp_hdrlen(skb); 856 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 857 hdr_len[2] = sizeof(struct udphdr); 858 } else if (skb->protocol == htons(ETH_P_IPV6)) { 859 hdr_len[1] = sizeof(struct ipv6hdr); 860 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 861 hdr_len[2] = tcp_hdrlen(skb); 862 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 863 hdr_len[2] = sizeof(struct udphdr); 864 } 865 866 memset(hdr_data, 0, 120); 867 if ((hdr_field >> 6) & 1) { 868 hdr = skb_mac_header(skb); 869 memcpy(hdr_data, hdr, hdr_len[0]); 870 len += hdr_len[0]; 871 } 872 873 if ((hdr_field >> 5) & 1) { 874 hdr = skb_network_header(skb); 875 memcpy(hdr_data + len, hdr, hdr_len[1]); 876 len += hdr_len[1]; 877 } 878 879 if ((hdr_field >> 4) & 1) { 880 hdr = skb_transport_header(skb); 881 memcpy(hdr_data + len, hdr, hdr_len[2]); 882 len += hdr_len[2]; 883 } 884 return len; 885 } 886 887 /** 888 * create_hdr_descs - create header and header extension descriptors 889 * @hdr_field - bitfield determining needed headers 890 * @data - buffer containing header data 891 * @len - length of data buffer 892 * @hdr_len - array of individual header lengths 893 * @scrq_arr - descriptor array 894 * 895 * Creates header and, if needed, header extension descriptors and 896 * places them in a descriptor array, scrq_arr 897 */ 898 899 static void create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 900 union sub_crq *scrq_arr) 901 { 902 union sub_crq hdr_desc; 903 int tmp_len = len; 904 u8 *data, *cur; 905 int tmp; 906 907 while (tmp_len > 0) { 908 cur = hdr_data + len - tmp_len; 909 910 memset(&hdr_desc, 0, sizeof(hdr_desc)); 911 if (cur != hdr_data) { 912 data = hdr_desc.hdr_ext.data; 913 tmp = tmp_len > 29 ? 29 : tmp_len; 914 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 915 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 916 hdr_desc.hdr_ext.len = tmp; 917 } else { 918 data = hdr_desc.hdr.data; 919 tmp = tmp_len > 24 ? 24 : tmp_len; 920 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 921 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 922 hdr_desc.hdr.len = tmp; 923 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 924 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 925 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 926 hdr_desc.hdr.flag = hdr_field << 1; 927 } 928 memcpy(data, cur, tmp); 929 tmp_len -= tmp; 930 *scrq_arr = hdr_desc; 931 scrq_arr++; 932 } 933 } 934 935 /** 936 * build_hdr_descs_arr - build a header descriptor array 937 * @skb - socket buffer 938 * @num_entries - number of descriptors to be sent 939 * @subcrq - first TX descriptor 940 * @hdr_field - bit field determining which headers will be sent 941 * 942 * This function will build a TX descriptor array with applicable 943 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 944 */ 945 946 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 947 int *num_entries, u8 hdr_field) 948 { 949 int hdr_len[3] = {0, 0, 0}; 950 int tot_len, len; 951 u8 *hdr_data = txbuff->hdr_data; 952 953 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 954 txbuff->hdr_data); 955 len = tot_len; 956 len -= 24; 957 if (len > 0) 958 num_entries += len % 29 ? len / 29 + 1 : len / 29; 959 create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 960 txbuff->indir_arr + 1); 961 } 962 963 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 964 { 965 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 966 int queue_num = skb_get_queue_mapping(skb); 967 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 968 struct device *dev = &adapter->vdev->dev; 969 struct ibmvnic_tx_buff *tx_buff = NULL; 970 struct ibmvnic_sub_crq_queue *tx_scrq; 971 struct ibmvnic_tx_pool *tx_pool; 972 unsigned int tx_send_failed = 0; 973 unsigned int tx_map_failed = 0; 974 unsigned int tx_dropped = 0; 975 unsigned int tx_packets = 0; 976 unsigned int tx_bytes = 0; 977 dma_addr_t data_dma_addr; 978 struct netdev_queue *txq; 979 unsigned long lpar_rc; 980 union sub_crq tx_crq; 981 unsigned int offset; 982 int num_entries = 1; 983 unsigned char *dst; 984 u64 *handle_array; 985 int index = 0; 986 int ret = 0; 987 988 if (adapter->resetting) { 989 if (!netif_subqueue_stopped(netdev, skb)) 990 netif_stop_subqueue(netdev, queue_num); 991 dev_kfree_skb_any(skb); 992 993 tx_send_failed++; 994 tx_dropped++; 995 ret = NETDEV_TX_OK; 996 goto out; 997 } 998 999 tx_pool = &adapter->tx_pool[queue_num]; 1000 tx_scrq = adapter->tx_scrq[queue_num]; 1001 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1002 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1003 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1004 1005 index = tx_pool->free_map[tx_pool->consumer_index]; 1006 offset = index * adapter->req_mtu; 1007 dst = tx_pool->long_term_buff.buff + offset; 1008 memset(dst, 0, adapter->req_mtu); 1009 skb_copy_from_linear_data(skb, dst, skb->len); 1010 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1011 1012 tx_pool->consumer_index = 1013 (tx_pool->consumer_index + 1) % 1014 adapter->req_tx_entries_per_subcrq; 1015 1016 tx_buff = &tx_pool->tx_buff[index]; 1017 tx_buff->skb = skb; 1018 tx_buff->data_dma[0] = data_dma_addr; 1019 tx_buff->data_len[0] = skb->len; 1020 tx_buff->index = index; 1021 tx_buff->pool_index = queue_num; 1022 tx_buff->last_frag = true; 1023 1024 memset(&tx_crq, 0, sizeof(tx_crq)); 1025 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1026 tx_crq.v1.type = IBMVNIC_TX_DESC; 1027 tx_crq.v1.n_crq_elem = 1; 1028 tx_crq.v1.n_sge = 1; 1029 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1030 tx_crq.v1.correlator = cpu_to_be32(index); 1031 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1032 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1033 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1034 1035 if (adapter->vlan_header_insertion) { 1036 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1037 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1038 } 1039 1040 if (skb->protocol == htons(ETH_P_IP)) { 1041 if (ip_hdr(skb)->version == 4) 1042 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1043 else if (ip_hdr(skb)->version == 6) 1044 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1045 1046 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1047 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1048 else if (ip_hdr(skb)->protocol != IPPROTO_TCP) 1049 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1050 } 1051 1052 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1053 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1054 hdrs += 2; 1055 } 1056 /* determine if l2/3/4 headers are sent to firmware */ 1057 if ((*hdrs >> 7) & 1 && 1058 (skb->protocol == htons(ETH_P_IP) || 1059 skb->protocol == htons(ETH_P_IPV6))) { 1060 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1061 tx_crq.v1.n_crq_elem = num_entries; 1062 tx_buff->indir_arr[0] = tx_crq; 1063 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1064 sizeof(tx_buff->indir_arr), 1065 DMA_TO_DEVICE); 1066 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1067 dev_kfree_skb_any(skb); 1068 tx_buff->skb = NULL; 1069 if (!firmware_has_feature(FW_FEATURE_CMO)) 1070 dev_err(dev, "tx: unable to map descriptor array\n"); 1071 tx_map_failed++; 1072 tx_dropped++; 1073 ret = NETDEV_TX_OK; 1074 goto out; 1075 } 1076 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1077 (u64)tx_buff->indir_dma, 1078 (u64)num_entries); 1079 } else { 1080 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1081 &tx_crq); 1082 } 1083 if (lpar_rc != H_SUCCESS) { 1084 dev_err(dev, "tx failed with code %ld\n", lpar_rc); 1085 1086 if (tx_pool->consumer_index == 0) 1087 tx_pool->consumer_index = 1088 adapter->req_tx_entries_per_subcrq - 1; 1089 else 1090 tx_pool->consumer_index--; 1091 1092 dev_kfree_skb_any(skb); 1093 tx_buff->skb = NULL; 1094 1095 if (lpar_rc == H_CLOSED) 1096 netif_stop_subqueue(netdev, queue_num); 1097 1098 tx_send_failed++; 1099 tx_dropped++; 1100 ret = NETDEV_TX_OK; 1101 goto out; 1102 } 1103 1104 if (atomic_inc_return(&tx_scrq->used) 1105 >= adapter->req_tx_entries_per_subcrq) { 1106 netdev_info(netdev, "Stopping queue %d\n", queue_num); 1107 netif_stop_subqueue(netdev, queue_num); 1108 } 1109 1110 tx_packets++; 1111 tx_bytes += skb->len; 1112 txq->trans_start = jiffies; 1113 ret = NETDEV_TX_OK; 1114 1115 out: 1116 netdev->stats.tx_dropped += tx_dropped; 1117 netdev->stats.tx_bytes += tx_bytes; 1118 netdev->stats.tx_packets += tx_packets; 1119 adapter->tx_send_failed += tx_send_failed; 1120 adapter->tx_map_failed += tx_map_failed; 1121 1122 return ret; 1123 } 1124 1125 static void ibmvnic_set_multi(struct net_device *netdev) 1126 { 1127 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1128 struct netdev_hw_addr *ha; 1129 union ibmvnic_crq crq; 1130 1131 memset(&crq, 0, sizeof(crq)); 1132 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1133 crq.request_capability.cmd = REQUEST_CAPABILITY; 1134 1135 if (netdev->flags & IFF_PROMISC) { 1136 if (!adapter->promisc_supported) 1137 return; 1138 } else { 1139 if (netdev->flags & IFF_ALLMULTI) { 1140 /* Accept all multicast */ 1141 memset(&crq, 0, sizeof(crq)); 1142 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1143 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1144 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1145 ibmvnic_send_crq(adapter, &crq); 1146 } else if (netdev_mc_empty(netdev)) { 1147 /* Reject all multicast */ 1148 memset(&crq, 0, sizeof(crq)); 1149 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1150 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1151 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1152 ibmvnic_send_crq(adapter, &crq); 1153 } else { 1154 /* Accept one or more multicast(s) */ 1155 netdev_for_each_mc_addr(ha, netdev) { 1156 memset(&crq, 0, sizeof(crq)); 1157 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1158 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1159 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1160 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1161 ha->addr); 1162 ibmvnic_send_crq(adapter, &crq); 1163 } 1164 } 1165 } 1166 } 1167 1168 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1169 { 1170 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1171 struct sockaddr *addr = p; 1172 union ibmvnic_crq crq; 1173 1174 if (!is_valid_ether_addr(addr->sa_data)) 1175 return -EADDRNOTAVAIL; 1176 1177 memset(&crq, 0, sizeof(crq)); 1178 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1179 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1180 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1181 ibmvnic_send_crq(adapter, &crq); 1182 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1183 return 0; 1184 } 1185 1186 /** 1187 * do_reset returns zero if we are able to keep processing reset events, or 1188 * non-zero if we hit a fatal error and must halt. 1189 */ 1190 static int do_reset(struct ibmvnic_adapter *adapter, 1191 struct ibmvnic_rwi *rwi, u32 reset_state) 1192 { 1193 struct net_device *netdev = adapter->netdev; 1194 int i, rc; 1195 1196 netif_carrier_off(netdev); 1197 adapter->reset_reason = rwi->reset_reason; 1198 1199 if (rwi->reset_reason == VNIC_RESET_MOBILITY) { 1200 rc = ibmvnic_reenable_crq_queue(adapter); 1201 if (rc) 1202 return 0; 1203 } 1204 1205 rc = __ibmvnic_close(netdev); 1206 if (rc) 1207 return rc; 1208 1209 /* remove the closed state so when we call open it appears 1210 * we are coming from the probed state. 1211 */ 1212 adapter->state = VNIC_PROBED; 1213 1214 release_resources(adapter); 1215 release_sub_crqs(adapter); 1216 release_crq_queue(adapter); 1217 1218 rc = ibmvnic_init(adapter); 1219 if (rc) 1220 return 0; 1221 1222 /* If the adapter was in PROBE state prior to the reset, exit here. */ 1223 if (reset_state == VNIC_PROBED) 1224 return 0; 1225 1226 rc = ibmvnic_login(netdev); 1227 if (rc) { 1228 adapter->state = VNIC_PROBED; 1229 return 0; 1230 } 1231 1232 rtnl_lock(); 1233 rc = init_resources(adapter); 1234 rtnl_unlock(); 1235 if (rc) 1236 return rc; 1237 1238 if (reset_state == VNIC_CLOSED) 1239 return 0; 1240 1241 rc = __ibmvnic_open(netdev); 1242 if (rc) { 1243 if (list_empty(&adapter->rwi_list)) 1244 adapter->state = VNIC_CLOSED; 1245 else 1246 adapter->state = reset_state; 1247 1248 return 0; 1249 } 1250 1251 netif_carrier_on(netdev); 1252 1253 /* kick napi */ 1254 for (i = 0; i < adapter->req_rx_queues; i++) 1255 napi_schedule(&adapter->napi[i]); 1256 1257 return 0; 1258 } 1259 1260 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1261 { 1262 struct ibmvnic_rwi *rwi; 1263 1264 mutex_lock(&adapter->rwi_lock); 1265 1266 if (!list_empty(&adapter->rwi_list)) { 1267 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1268 list); 1269 list_del(&rwi->list); 1270 } else { 1271 rwi = NULL; 1272 } 1273 1274 mutex_unlock(&adapter->rwi_lock); 1275 return rwi; 1276 } 1277 1278 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1279 { 1280 struct ibmvnic_rwi *rwi; 1281 1282 rwi = get_next_rwi(adapter); 1283 while (rwi) { 1284 kfree(rwi); 1285 rwi = get_next_rwi(adapter); 1286 } 1287 } 1288 1289 static void __ibmvnic_reset(struct work_struct *work) 1290 { 1291 struct ibmvnic_rwi *rwi; 1292 struct ibmvnic_adapter *adapter; 1293 struct net_device *netdev; 1294 u32 reset_state; 1295 int rc; 1296 1297 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1298 netdev = adapter->netdev; 1299 1300 mutex_lock(&adapter->reset_lock); 1301 adapter->resetting = true; 1302 reset_state = adapter->state; 1303 1304 rwi = get_next_rwi(adapter); 1305 while (rwi) { 1306 rc = do_reset(adapter, rwi, reset_state); 1307 kfree(rwi); 1308 if (rc) 1309 break; 1310 1311 rwi = get_next_rwi(adapter); 1312 } 1313 1314 if (rc) { 1315 free_all_rwi(adapter); 1316 return; 1317 } 1318 1319 adapter->resetting = false; 1320 mutex_unlock(&adapter->reset_lock); 1321 } 1322 1323 static void ibmvnic_reset(struct ibmvnic_adapter *adapter, 1324 enum ibmvnic_reset_reason reason) 1325 { 1326 struct ibmvnic_rwi *rwi, *tmp; 1327 struct net_device *netdev = adapter->netdev; 1328 struct list_head *entry; 1329 1330 if (adapter->state == VNIC_REMOVING || 1331 adapter->state == VNIC_REMOVED) { 1332 netdev_dbg(netdev, "Adapter removing, skipping reset\n"); 1333 return; 1334 } 1335 1336 mutex_lock(&adapter->rwi_lock); 1337 1338 list_for_each(entry, &adapter->rwi_list) { 1339 tmp = list_entry(entry, struct ibmvnic_rwi, list); 1340 if (tmp->reset_reason == reason) { 1341 netdev_err(netdev, "Matching reset found, skipping\n"); 1342 mutex_unlock(&adapter->rwi_lock); 1343 return; 1344 } 1345 } 1346 1347 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL); 1348 if (!rwi) { 1349 mutex_unlock(&adapter->rwi_lock); 1350 ibmvnic_close(netdev); 1351 return; 1352 } 1353 1354 rwi->reset_reason = reason; 1355 list_add_tail(&rwi->list, &adapter->rwi_list); 1356 mutex_unlock(&adapter->rwi_lock); 1357 schedule_work(&adapter->ibmvnic_reset); 1358 } 1359 1360 static void ibmvnic_tx_timeout(struct net_device *dev) 1361 { 1362 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1363 1364 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 1365 } 1366 1367 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 1368 struct ibmvnic_rx_buff *rx_buff) 1369 { 1370 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 1371 1372 rx_buff->skb = NULL; 1373 1374 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 1375 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 1376 1377 atomic_dec(&pool->available); 1378 } 1379 1380 static int ibmvnic_poll(struct napi_struct *napi, int budget) 1381 { 1382 struct net_device *netdev = napi->dev; 1383 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1384 int scrq_num = (int)(napi - adapter->napi); 1385 int frames_processed = 0; 1386 restart_poll: 1387 while (frames_processed < budget) { 1388 struct sk_buff *skb; 1389 struct ibmvnic_rx_buff *rx_buff; 1390 union sub_crq *next; 1391 u32 length; 1392 u16 offset; 1393 u8 flags = 0; 1394 1395 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 1396 break; 1397 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 1398 rx_buff = 1399 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 1400 rx_comp.correlator); 1401 /* do error checking */ 1402 if (next->rx_comp.rc) { 1403 netdev_err(netdev, "rx error %x\n", next->rx_comp.rc); 1404 /* free the entry */ 1405 next->rx_comp.first = 0; 1406 remove_buff_from_pool(adapter, rx_buff); 1407 continue; 1408 } 1409 1410 length = be32_to_cpu(next->rx_comp.len); 1411 offset = be16_to_cpu(next->rx_comp.off_frame_data); 1412 flags = next->rx_comp.flags; 1413 skb = rx_buff->skb; 1414 skb_copy_to_linear_data(skb, rx_buff->data + offset, 1415 length); 1416 1417 /* VLAN Header has been stripped by the system firmware and 1418 * needs to be inserted by the driver 1419 */ 1420 if (adapter->rx_vlan_header_insertion && 1421 (flags & IBMVNIC_VLAN_STRIPPED)) 1422 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1423 ntohs(next->rx_comp.vlan_tci)); 1424 1425 /* free the entry */ 1426 next->rx_comp.first = 0; 1427 remove_buff_from_pool(adapter, rx_buff); 1428 1429 skb_put(skb, length); 1430 skb->protocol = eth_type_trans(skb, netdev); 1431 skb_record_rx_queue(skb, scrq_num); 1432 1433 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 1434 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 1435 skb->ip_summed = CHECKSUM_UNNECESSARY; 1436 } 1437 1438 length = skb->len; 1439 napi_gro_receive(napi, skb); /* send it up */ 1440 netdev->stats.rx_packets++; 1441 netdev->stats.rx_bytes += length; 1442 frames_processed++; 1443 } 1444 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 1445 1446 if (frames_processed < budget) { 1447 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1448 napi_complete_done(napi, frames_processed); 1449 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 1450 napi_reschedule(napi)) { 1451 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 1452 goto restart_poll; 1453 } 1454 } 1455 return frames_processed; 1456 } 1457 1458 #ifdef CONFIG_NET_POLL_CONTROLLER 1459 static void ibmvnic_netpoll_controller(struct net_device *dev) 1460 { 1461 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1462 int i; 1463 1464 replenish_pools(netdev_priv(dev)); 1465 for (i = 0; i < adapter->req_rx_queues; i++) 1466 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 1467 adapter->rx_scrq[i]); 1468 } 1469 #endif 1470 1471 static const struct net_device_ops ibmvnic_netdev_ops = { 1472 .ndo_open = ibmvnic_open, 1473 .ndo_stop = ibmvnic_close, 1474 .ndo_start_xmit = ibmvnic_xmit, 1475 .ndo_set_rx_mode = ibmvnic_set_multi, 1476 .ndo_set_mac_address = ibmvnic_set_mac, 1477 .ndo_validate_addr = eth_validate_addr, 1478 .ndo_tx_timeout = ibmvnic_tx_timeout, 1479 #ifdef CONFIG_NET_POLL_CONTROLLER 1480 .ndo_poll_controller = ibmvnic_netpoll_controller, 1481 #endif 1482 }; 1483 1484 /* ethtool functions */ 1485 1486 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 1487 struct ethtool_link_ksettings *cmd) 1488 { 1489 u32 supported, advertising; 1490 1491 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 1492 SUPPORTED_FIBRE); 1493 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 1494 ADVERTISED_FIBRE); 1495 cmd->base.speed = SPEED_1000; 1496 cmd->base.duplex = DUPLEX_FULL; 1497 cmd->base.port = PORT_FIBRE; 1498 cmd->base.phy_address = 0; 1499 cmd->base.autoneg = AUTONEG_ENABLE; 1500 1501 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 1502 supported); 1503 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 1504 advertising); 1505 1506 return 0; 1507 } 1508 1509 static void ibmvnic_get_drvinfo(struct net_device *dev, 1510 struct ethtool_drvinfo *info) 1511 { 1512 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 1513 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 1514 } 1515 1516 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 1517 { 1518 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1519 1520 return adapter->msg_enable; 1521 } 1522 1523 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 1524 { 1525 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1526 1527 adapter->msg_enable = data; 1528 } 1529 1530 static u32 ibmvnic_get_link(struct net_device *netdev) 1531 { 1532 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1533 1534 /* Don't need to send a query because we request a logical link up at 1535 * init and then we wait for link state indications 1536 */ 1537 return adapter->logical_link_state; 1538 } 1539 1540 static void ibmvnic_get_ringparam(struct net_device *netdev, 1541 struct ethtool_ringparam *ring) 1542 { 1543 ring->rx_max_pending = 0; 1544 ring->tx_max_pending = 0; 1545 ring->rx_mini_max_pending = 0; 1546 ring->rx_jumbo_max_pending = 0; 1547 ring->rx_pending = 0; 1548 ring->tx_pending = 0; 1549 ring->rx_mini_pending = 0; 1550 ring->rx_jumbo_pending = 0; 1551 } 1552 1553 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 1554 { 1555 int i; 1556 1557 if (stringset != ETH_SS_STATS) 1558 return; 1559 1560 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 1561 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 1562 } 1563 1564 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 1565 { 1566 switch (sset) { 1567 case ETH_SS_STATS: 1568 return ARRAY_SIZE(ibmvnic_stats); 1569 default: 1570 return -EOPNOTSUPP; 1571 } 1572 } 1573 1574 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 1575 struct ethtool_stats *stats, u64 *data) 1576 { 1577 struct ibmvnic_adapter *adapter = netdev_priv(dev); 1578 union ibmvnic_crq crq; 1579 int i; 1580 1581 memset(&crq, 0, sizeof(crq)); 1582 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 1583 crq.request_statistics.cmd = REQUEST_STATISTICS; 1584 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 1585 crq.request_statistics.len = 1586 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 1587 1588 /* Wait for data to be written */ 1589 init_completion(&adapter->stats_done); 1590 ibmvnic_send_crq(adapter, &crq); 1591 wait_for_completion(&adapter->stats_done); 1592 1593 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 1594 data[i] = IBMVNIC_GET_STAT(adapter, ibmvnic_stats[i].offset); 1595 } 1596 1597 static const struct ethtool_ops ibmvnic_ethtool_ops = { 1598 .get_drvinfo = ibmvnic_get_drvinfo, 1599 .get_msglevel = ibmvnic_get_msglevel, 1600 .set_msglevel = ibmvnic_set_msglevel, 1601 .get_link = ibmvnic_get_link, 1602 .get_ringparam = ibmvnic_get_ringparam, 1603 .get_strings = ibmvnic_get_strings, 1604 .get_sset_count = ibmvnic_get_sset_count, 1605 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 1606 .get_link_ksettings = ibmvnic_get_link_ksettings, 1607 }; 1608 1609 /* Routines for managing CRQs/sCRQs */ 1610 1611 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 1612 struct ibmvnic_sub_crq_queue *scrq) 1613 { 1614 struct device *dev = &adapter->vdev->dev; 1615 long rc; 1616 1617 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 1618 1619 /* Close the sub-crqs */ 1620 do { 1621 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 1622 adapter->vdev->unit_address, 1623 scrq->crq_num); 1624 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 1625 1626 if (rc) { 1627 netdev_err(adapter->netdev, 1628 "Failed to release sub-CRQ %16lx, rc = %ld\n", 1629 scrq->crq_num, rc); 1630 } 1631 1632 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1633 DMA_BIDIRECTIONAL); 1634 free_pages((unsigned long)scrq->msgs, 2); 1635 kfree(scrq); 1636 } 1637 1638 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 1639 *adapter) 1640 { 1641 struct device *dev = &adapter->vdev->dev; 1642 struct ibmvnic_sub_crq_queue *scrq; 1643 int rc; 1644 1645 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 1646 if (!scrq) 1647 return NULL; 1648 1649 scrq->msgs = 1650 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 1651 if (!scrq->msgs) { 1652 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 1653 goto zero_page_failed; 1654 } 1655 1656 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 1657 DMA_BIDIRECTIONAL); 1658 if (dma_mapping_error(dev, scrq->msg_token)) { 1659 dev_warn(dev, "Couldn't map crq queue messages page\n"); 1660 goto map_failed; 1661 } 1662 1663 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 1664 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 1665 1666 if (rc == H_RESOURCE) 1667 rc = ibmvnic_reset_crq(adapter); 1668 1669 if (rc == H_CLOSED) { 1670 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 1671 } else if (rc) { 1672 dev_warn(dev, "Error %d registering sub-crq\n", rc); 1673 goto reg_failed; 1674 } 1675 1676 scrq->adapter = adapter; 1677 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 1678 spin_lock_init(&scrq->lock); 1679 1680 netdev_dbg(adapter->netdev, 1681 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 1682 scrq->crq_num, scrq->hw_irq, scrq->irq); 1683 1684 return scrq; 1685 1686 reg_failed: 1687 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 1688 DMA_BIDIRECTIONAL); 1689 map_failed: 1690 free_pages((unsigned long)scrq->msgs, 2); 1691 zero_page_failed: 1692 kfree(scrq); 1693 1694 return NULL; 1695 } 1696 1697 static void release_sub_crqs(struct ibmvnic_adapter *adapter) 1698 { 1699 int i; 1700 1701 if (adapter->tx_scrq) { 1702 for (i = 0; i < adapter->req_tx_queues; i++) { 1703 if (!adapter->tx_scrq[i]) 1704 continue; 1705 1706 if (adapter->tx_scrq[i]->irq) { 1707 free_irq(adapter->tx_scrq[i]->irq, 1708 adapter->tx_scrq[i]); 1709 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 1710 adapter->tx_scrq[i]->irq = 0; 1711 } 1712 1713 release_sub_crq_queue(adapter, adapter->tx_scrq[i]); 1714 } 1715 1716 kfree(adapter->tx_scrq); 1717 adapter->tx_scrq = NULL; 1718 } 1719 1720 if (adapter->rx_scrq) { 1721 for (i = 0; i < adapter->req_rx_queues; i++) { 1722 if (!adapter->rx_scrq[i]) 1723 continue; 1724 1725 if (adapter->rx_scrq[i]->irq) { 1726 free_irq(adapter->rx_scrq[i]->irq, 1727 adapter->rx_scrq[i]); 1728 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 1729 adapter->rx_scrq[i]->irq = 0; 1730 } 1731 1732 release_sub_crq_queue(adapter, adapter->rx_scrq[i]); 1733 } 1734 1735 kfree(adapter->rx_scrq); 1736 adapter->rx_scrq = NULL; 1737 } 1738 } 1739 1740 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 1741 struct ibmvnic_sub_crq_queue *scrq) 1742 { 1743 struct device *dev = &adapter->vdev->dev; 1744 unsigned long rc; 1745 1746 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1747 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1748 if (rc) 1749 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 1750 scrq->hw_irq, rc); 1751 return rc; 1752 } 1753 1754 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 1755 struct ibmvnic_sub_crq_queue *scrq) 1756 { 1757 struct device *dev = &adapter->vdev->dev; 1758 unsigned long rc; 1759 1760 if (scrq->hw_irq > 0x100000000ULL) { 1761 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 1762 return 1; 1763 } 1764 1765 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 1766 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 1767 if (rc) 1768 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 1769 scrq->hw_irq, rc); 1770 return rc; 1771 } 1772 1773 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 1774 struct ibmvnic_sub_crq_queue *scrq) 1775 { 1776 struct device *dev = &adapter->vdev->dev; 1777 struct ibmvnic_tx_buff *txbuff; 1778 union sub_crq *next; 1779 int index; 1780 int i, j; 1781 u8 first; 1782 1783 restart_loop: 1784 while (pending_scrq(adapter, scrq)) { 1785 unsigned int pool = scrq->pool_index; 1786 1787 next = ibmvnic_next_scrq(adapter, scrq); 1788 for (i = 0; i < next->tx_comp.num_comps; i++) { 1789 if (next->tx_comp.rcs[i]) { 1790 dev_err(dev, "tx error %x\n", 1791 next->tx_comp.rcs[i]); 1792 continue; 1793 } 1794 index = be32_to_cpu(next->tx_comp.correlators[i]); 1795 txbuff = &adapter->tx_pool[pool].tx_buff[index]; 1796 1797 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 1798 if (!txbuff->data_dma[j]) 1799 continue; 1800 1801 txbuff->data_dma[j] = 0; 1802 } 1803 /* if sub_crq was sent indirectly */ 1804 first = txbuff->indir_arr[0].generic.first; 1805 if (first == IBMVNIC_CRQ_CMD) { 1806 dma_unmap_single(dev, txbuff->indir_dma, 1807 sizeof(txbuff->indir_arr), 1808 DMA_TO_DEVICE); 1809 } 1810 1811 if (txbuff->last_frag) { 1812 dev_kfree_skb_any(txbuff->skb); 1813 txbuff->skb = NULL; 1814 } 1815 1816 adapter->tx_pool[pool].free_map[adapter->tx_pool[pool]. 1817 producer_index] = index; 1818 adapter->tx_pool[pool].producer_index = 1819 (adapter->tx_pool[pool].producer_index + 1) % 1820 adapter->req_tx_entries_per_subcrq; 1821 } 1822 /* remove tx_comp scrq*/ 1823 next->tx_comp.first = 0; 1824 1825 if (atomic_sub_return(next->tx_comp.num_comps, &scrq->used) <= 1826 (adapter->req_tx_entries_per_subcrq / 2) && 1827 __netif_subqueue_stopped(adapter->netdev, 1828 scrq->pool_index)) { 1829 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 1830 netdev_info(adapter->netdev, "Started queue %d\n", 1831 scrq->pool_index); 1832 } 1833 } 1834 1835 enable_scrq_irq(adapter, scrq); 1836 1837 if (pending_scrq(adapter, scrq)) { 1838 disable_scrq_irq(adapter, scrq); 1839 goto restart_loop; 1840 } 1841 1842 return 0; 1843 } 1844 1845 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 1846 { 1847 struct ibmvnic_sub_crq_queue *scrq = instance; 1848 struct ibmvnic_adapter *adapter = scrq->adapter; 1849 1850 disable_scrq_irq(adapter, scrq); 1851 ibmvnic_complete_tx(adapter, scrq); 1852 1853 return IRQ_HANDLED; 1854 } 1855 1856 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 1857 { 1858 struct ibmvnic_sub_crq_queue *scrq = instance; 1859 struct ibmvnic_adapter *adapter = scrq->adapter; 1860 1861 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 1862 disable_scrq_irq(adapter, scrq); 1863 __napi_schedule(&adapter->napi[scrq->scrq_num]); 1864 } 1865 1866 return IRQ_HANDLED; 1867 } 1868 1869 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 1870 { 1871 struct device *dev = &adapter->vdev->dev; 1872 struct ibmvnic_sub_crq_queue *scrq; 1873 int i = 0, j = 0; 1874 int rc = 0; 1875 1876 for (i = 0; i < adapter->req_tx_queues; i++) { 1877 scrq = adapter->tx_scrq[i]; 1878 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1879 1880 if (!scrq->irq) { 1881 rc = -EINVAL; 1882 dev_err(dev, "Error mapping irq\n"); 1883 goto req_tx_irq_failed; 1884 } 1885 1886 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 1887 0, "ibmvnic_tx", scrq); 1888 1889 if (rc) { 1890 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 1891 scrq->irq, rc); 1892 irq_dispose_mapping(scrq->irq); 1893 goto req_rx_irq_failed; 1894 } 1895 } 1896 1897 for (i = 0; i < adapter->req_rx_queues; i++) { 1898 scrq = adapter->rx_scrq[i]; 1899 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 1900 if (!scrq->irq) { 1901 rc = -EINVAL; 1902 dev_err(dev, "Error mapping irq\n"); 1903 goto req_rx_irq_failed; 1904 } 1905 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 1906 0, "ibmvnic_rx", scrq); 1907 if (rc) { 1908 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 1909 scrq->irq, rc); 1910 irq_dispose_mapping(scrq->irq); 1911 goto req_rx_irq_failed; 1912 } 1913 } 1914 return rc; 1915 1916 req_rx_irq_failed: 1917 for (j = 0; j < i; j++) { 1918 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 1919 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1920 } 1921 i = adapter->req_tx_queues; 1922 req_tx_irq_failed: 1923 for (j = 0; j < i; j++) { 1924 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 1925 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 1926 } 1927 release_sub_crqs(adapter); 1928 return rc; 1929 } 1930 1931 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 1932 { 1933 struct device *dev = &adapter->vdev->dev; 1934 struct ibmvnic_sub_crq_queue **allqueues; 1935 int registered_queues = 0; 1936 int total_queues; 1937 int more = 0; 1938 int i; 1939 1940 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 1941 1942 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 1943 if (!allqueues) 1944 return -1; 1945 1946 for (i = 0; i < total_queues; i++) { 1947 allqueues[i] = init_sub_crq_queue(adapter); 1948 if (!allqueues[i]) { 1949 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 1950 break; 1951 } 1952 registered_queues++; 1953 } 1954 1955 /* Make sure we were able to register the minimum number of queues */ 1956 if (registered_queues < 1957 adapter->min_tx_queues + adapter->min_rx_queues) { 1958 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 1959 goto tx_failed; 1960 } 1961 1962 /* Distribute the failed allocated queues*/ 1963 for (i = 0; i < total_queues - registered_queues + more ; i++) { 1964 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 1965 switch (i % 3) { 1966 case 0: 1967 if (adapter->req_rx_queues > adapter->min_rx_queues) 1968 adapter->req_rx_queues--; 1969 else 1970 more++; 1971 break; 1972 case 1: 1973 if (adapter->req_tx_queues > adapter->min_tx_queues) 1974 adapter->req_tx_queues--; 1975 else 1976 more++; 1977 break; 1978 } 1979 } 1980 1981 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 1982 sizeof(*adapter->tx_scrq), GFP_KERNEL); 1983 if (!adapter->tx_scrq) 1984 goto tx_failed; 1985 1986 for (i = 0; i < adapter->req_tx_queues; i++) { 1987 adapter->tx_scrq[i] = allqueues[i]; 1988 adapter->tx_scrq[i]->pool_index = i; 1989 } 1990 1991 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 1992 sizeof(*adapter->rx_scrq), GFP_KERNEL); 1993 if (!adapter->rx_scrq) 1994 goto rx_failed; 1995 1996 for (i = 0; i < adapter->req_rx_queues; i++) { 1997 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 1998 adapter->rx_scrq[i]->scrq_num = i; 1999 } 2000 2001 kfree(allqueues); 2002 return 0; 2003 2004 rx_failed: 2005 kfree(adapter->tx_scrq); 2006 adapter->tx_scrq = NULL; 2007 tx_failed: 2008 for (i = 0; i < registered_queues; i++) 2009 release_sub_crq_queue(adapter, allqueues[i]); 2010 kfree(allqueues); 2011 return -1; 2012 } 2013 2014 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 2015 { 2016 struct device *dev = &adapter->vdev->dev; 2017 union ibmvnic_crq crq; 2018 2019 if (!retry) { 2020 /* Sub-CRQ entries are 32 byte long */ 2021 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 2022 2023 if (adapter->min_tx_entries_per_subcrq > entries_page || 2024 adapter->min_rx_add_entries_per_subcrq > entries_page) { 2025 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 2026 return; 2027 } 2028 2029 /* Get the minimum between the queried max and the entries 2030 * that fit in our PAGE_SIZE 2031 */ 2032 adapter->req_tx_entries_per_subcrq = 2033 adapter->max_tx_entries_per_subcrq > entries_page ? 2034 entries_page : adapter->max_tx_entries_per_subcrq; 2035 adapter->req_rx_add_entries_per_subcrq = 2036 adapter->max_rx_add_entries_per_subcrq > entries_page ? 2037 entries_page : adapter->max_rx_add_entries_per_subcrq; 2038 2039 adapter->req_tx_queues = adapter->opt_tx_comp_sub_queues; 2040 adapter->req_rx_queues = adapter->opt_rx_comp_queues; 2041 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 2042 2043 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 2044 } 2045 2046 memset(&crq, 0, sizeof(crq)); 2047 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2048 crq.request_capability.cmd = REQUEST_CAPABILITY; 2049 2050 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 2051 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 2052 atomic_inc(&adapter->running_cap_crqs); 2053 ibmvnic_send_crq(adapter, &crq); 2054 2055 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 2056 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 2057 atomic_inc(&adapter->running_cap_crqs); 2058 ibmvnic_send_crq(adapter, &crq); 2059 2060 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 2061 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 2062 atomic_inc(&adapter->running_cap_crqs); 2063 ibmvnic_send_crq(adapter, &crq); 2064 2065 crq.request_capability.capability = 2066 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 2067 crq.request_capability.number = 2068 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 2069 atomic_inc(&adapter->running_cap_crqs); 2070 ibmvnic_send_crq(adapter, &crq); 2071 2072 crq.request_capability.capability = 2073 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 2074 crq.request_capability.number = 2075 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 2076 atomic_inc(&adapter->running_cap_crqs); 2077 ibmvnic_send_crq(adapter, &crq); 2078 2079 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 2080 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 2081 atomic_inc(&adapter->running_cap_crqs); 2082 ibmvnic_send_crq(adapter, &crq); 2083 2084 if (adapter->netdev->flags & IFF_PROMISC) { 2085 if (adapter->promisc_supported) { 2086 crq.request_capability.capability = 2087 cpu_to_be16(PROMISC_REQUESTED); 2088 crq.request_capability.number = cpu_to_be64(1); 2089 atomic_inc(&adapter->running_cap_crqs); 2090 ibmvnic_send_crq(adapter, &crq); 2091 } 2092 } else { 2093 crq.request_capability.capability = 2094 cpu_to_be16(PROMISC_REQUESTED); 2095 crq.request_capability.number = cpu_to_be64(0); 2096 atomic_inc(&adapter->running_cap_crqs); 2097 ibmvnic_send_crq(adapter, &crq); 2098 } 2099 } 2100 2101 static int pending_scrq(struct ibmvnic_adapter *adapter, 2102 struct ibmvnic_sub_crq_queue *scrq) 2103 { 2104 union sub_crq *entry = &scrq->msgs[scrq->cur]; 2105 2106 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP || 2107 adapter->state == VNIC_CLOSING) 2108 return 1; 2109 else 2110 return 0; 2111 } 2112 2113 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 2114 struct ibmvnic_sub_crq_queue *scrq) 2115 { 2116 union sub_crq *entry; 2117 unsigned long flags; 2118 2119 spin_lock_irqsave(&scrq->lock, flags); 2120 entry = &scrq->msgs[scrq->cur]; 2121 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2122 if (++scrq->cur == scrq->size) 2123 scrq->cur = 0; 2124 } else { 2125 entry = NULL; 2126 } 2127 spin_unlock_irqrestore(&scrq->lock, flags); 2128 2129 return entry; 2130 } 2131 2132 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 2133 { 2134 struct ibmvnic_crq_queue *queue = &adapter->crq; 2135 union ibmvnic_crq *crq; 2136 2137 crq = &queue->msgs[queue->cur]; 2138 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 2139 if (++queue->cur == queue->size) 2140 queue->cur = 0; 2141 } else { 2142 crq = NULL; 2143 } 2144 2145 return crq; 2146 } 2147 2148 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 2149 union sub_crq *sub_crq) 2150 { 2151 unsigned int ua = adapter->vdev->unit_address; 2152 struct device *dev = &adapter->vdev->dev; 2153 u64 *u64_crq = (u64 *)sub_crq; 2154 int rc; 2155 2156 netdev_dbg(adapter->netdev, 2157 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 2158 (unsigned long int)cpu_to_be64(remote_handle), 2159 (unsigned long int)cpu_to_be64(u64_crq[0]), 2160 (unsigned long int)cpu_to_be64(u64_crq[1]), 2161 (unsigned long int)cpu_to_be64(u64_crq[2]), 2162 (unsigned long int)cpu_to_be64(u64_crq[3])); 2163 2164 /* Make sure the hypervisor sees the complete request */ 2165 mb(); 2166 2167 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 2168 cpu_to_be64(remote_handle), 2169 cpu_to_be64(u64_crq[0]), 2170 cpu_to_be64(u64_crq[1]), 2171 cpu_to_be64(u64_crq[2]), 2172 cpu_to_be64(u64_crq[3])); 2173 2174 if (rc) { 2175 if (rc == H_CLOSED) 2176 dev_warn(dev, "CRQ Queue closed\n"); 2177 dev_err(dev, "Send error (rc=%d)\n", rc); 2178 } 2179 2180 return rc; 2181 } 2182 2183 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 2184 u64 remote_handle, u64 ioba, u64 num_entries) 2185 { 2186 unsigned int ua = adapter->vdev->unit_address; 2187 struct device *dev = &adapter->vdev->dev; 2188 int rc; 2189 2190 /* Make sure the hypervisor sees the complete request */ 2191 mb(); 2192 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 2193 cpu_to_be64(remote_handle), 2194 ioba, num_entries); 2195 2196 if (rc) { 2197 if (rc == H_CLOSED) 2198 dev_warn(dev, "CRQ Queue closed\n"); 2199 dev_err(dev, "Send (indirect) error (rc=%d)\n", rc); 2200 } 2201 2202 return rc; 2203 } 2204 2205 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 2206 union ibmvnic_crq *crq) 2207 { 2208 unsigned int ua = adapter->vdev->unit_address; 2209 struct device *dev = &adapter->vdev->dev; 2210 u64 *u64_crq = (u64 *)crq; 2211 int rc; 2212 2213 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 2214 (unsigned long int)cpu_to_be64(u64_crq[0]), 2215 (unsigned long int)cpu_to_be64(u64_crq[1])); 2216 2217 /* Make sure the hypervisor sees the complete request */ 2218 mb(); 2219 2220 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 2221 cpu_to_be64(u64_crq[0]), 2222 cpu_to_be64(u64_crq[1])); 2223 2224 if (rc) { 2225 if (rc == H_CLOSED) 2226 dev_warn(dev, "CRQ Queue closed\n"); 2227 dev_warn(dev, "Send error (rc=%d)\n", rc); 2228 } 2229 2230 return rc; 2231 } 2232 2233 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 2234 { 2235 union ibmvnic_crq crq; 2236 2237 memset(&crq, 0, sizeof(crq)); 2238 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 2239 crq.generic.cmd = IBMVNIC_CRQ_INIT; 2240 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 2241 2242 return ibmvnic_send_crq(adapter, &crq); 2243 } 2244 2245 static int send_version_xchg(struct ibmvnic_adapter *adapter) 2246 { 2247 union ibmvnic_crq crq; 2248 2249 memset(&crq, 0, sizeof(crq)); 2250 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 2251 crq.version_exchange.cmd = VERSION_EXCHANGE; 2252 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 2253 2254 return ibmvnic_send_crq(adapter, &crq); 2255 } 2256 2257 static void send_login(struct ibmvnic_adapter *adapter) 2258 { 2259 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 2260 struct ibmvnic_login_buffer *login_buffer; 2261 struct device *dev = &adapter->vdev->dev; 2262 dma_addr_t rsp_buffer_token; 2263 dma_addr_t buffer_token; 2264 size_t rsp_buffer_size; 2265 union ibmvnic_crq crq; 2266 size_t buffer_size; 2267 __be64 *tx_list_p; 2268 __be64 *rx_list_p; 2269 int i; 2270 2271 buffer_size = 2272 sizeof(struct ibmvnic_login_buffer) + 2273 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues); 2274 2275 login_buffer = kmalloc(buffer_size, GFP_ATOMIC); 2276 if (!login_buffer) 2277 goto buf_alloc_failed; 2278 2279 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 2280 DMA_TO_DEVICE); 2281 if (dma_mapping_error(dev, buffer_token)) { 2282 dev_err(dev, "Couldn't map login buffer\n"); 2283 goto buf_map_failed; 2284 } 2285 2286 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 2287 sizeof(u64) * adapter->req_tx_queues + 2288 sizeof(u64) * adapter->req_rx_queues + 2289 sizeof(u64) * adapter->req_rx_queues + 2290 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 2291 2292 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 2293 if (!login_rsp_buffer) 2294 goto buf_rsp_alloc_failed; 2295 2296 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 2297 rsp_buffer_size, DMA_FROM_DEVICE); 2298 if (dma_mapping_error(dev, rsp_buffer_token)) { 2299 dev_err(dev, "Couldn't map login rsp buffer\n"); 2300 goto buf_rsp_map_failed; 2301 } 2302 2303 adapter->login_buf = login_buffer; 2304 adapter->login_buf_token = buffer_token; 2305 adapter->login_buf_sz = buffer_size; 2306 adapter->login_rsp_buf = login_rsp_buffer; 2307 adapter->login_rsp_buf_token = rsp_buffer_token; 2308 adapter->login_rsp_buf_sz = rsp_buffer_size; 2309 2310 login_buffer->len = cpu_to_be32(buffer_size); 2311 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 2312 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 2313 login_buffer->off_txcomp_subcrqs = 2314 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 2315 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 2316 login_buffer->off_rxcomp_subcrqs = 2317 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 2318 sizeof(u64) * adapter->req_tx_queues); 2319 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 2320 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 2321 2322 tx_list_p = (__be64 *)((char *)login_buffer + 2323 sizeof(struct ibmvnic_login_buffer)); 2324 rx_list_p = (__be64 *)((char *)login_buffer + 2325 sizeof(struct ibmvnic_login_buffer) + 2326 sizeof(u64) * adapter->req_tx_queues); 2327 2328 for (i = 0; i < adapter->req_tx_queues; i++) { 2329 if (adapter->tx_scrq[i]) { 2330 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 2331 crq_num); 2332 } 2333 } 2334 2335 for (i = 0; i < adapter->req_rx_queues; i++) { 2336 if (adapter->rx_scrq[i]) { 2337 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 2338 crq_num); 2339 } 2340 } 2341 2342 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 2343 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 2344 netdev_dbg(adapter->netdev, "%016lx\n", 2345 ((unsigned long int *)(adapter->login_buf))[i]); 2346 } 2347 2348 memset(&crq, 0, sizeof(crq)); 2349 crq.login.first = IBMVNIC_CRQ_CMD; 2350 crq.login.cmd = LOGIN; 2351 crq.login.ioba = cpu_to_be32(buffer_token); 2352 crq.login.len = cpu_to_be32(buffer_size); 2353 ibmvnic_send_crq(adapter, &crq); 2354 2355 return; 2356 2357 buf_rsp_map_failed: 2358 kfree(login_rsp_buffer); 2359 buf_rsp_alloc_failed: 2360 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 2361 buf_map_failed: 2362 kfree(login_buffer); 2363 buf_alloc_failed: 2364 return; 2365 } 2366 2367 static void send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 2368 u32 len, u8 map_id) 2369 { 2370 union ibmvnic_crq crq; 2371 2372 memset(&crq, 0, sizeof(crq)); 2373 crq.request_map.first = IBMVNIC_CRQ_CMD; 2374 crq.request_map.cmd = REQUEST_MAP; 2375 crq.request_map.map_id = map_id; 2376 crq.request_map.ioba = cpu_to_be32(addr); 2377 crq.request_map.len = cpu_to_be32(len); 2378 ibmvnic_send_crq(adapter, &crq); 2379 } 2380 2381 static void send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 2382 { 2383 union ibmvnic_crq crq; 2384 2385 memset(&crq, 0, sizeof(crq)); 2386 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 2387 crq.request_unmap.cmd = REQUEST_UNMAP; 2388 crq.request_unmap.map_id = map_id; 2389 ibmvnic_send_crq(adapter, &crq); 2390 } 2391 2392 static void send_map_query(struct ibmvnic_adapter *adapter) 2393 { 2394 union ibmvnic_crq crq; 2395 2396 memset(&crq, 0, sizeof(crq)); 2397 crq.query_map.first = IBMVNIC_CRQ_CMD; 2398 crq.query_map.cmd = QUERY_MAP; 2399 ibmvnic_send_crq(adapter, &crq); 2400 } 2401 2402 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 2403 static void send_cap_queries(struct ibmvnic_adapter *adapter) 2404 { 2405 union ibmvnic_crq crq; 2406 2407 atomic_set(&adapter->running_cap_crqs, 0); 2408 memset(&crq, 0, sizeof(crq)); 2409 crq.query_capability.first = IBMVNIC_CRQ_CMD; 2410 crq.query_capability.cmd = QUERY_CAPABILITY; 2411 2412 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 2413 atomic_inc(&adapter->running_cap_crqs); 2414 ibmvnic_send_crq(adapter, &crq); 2415 2416 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 2417 atomic_inc(&adapter->running_cap_crqs); 2418 ibmvnic_send_crq(adapter, &crq); 2419 2420 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 2421 atomic_inc(&adapter->running_cap_crqs); 2422 ibmvnic_send_crq(adapter, &crq); 2423 2424 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 2425 atomic_inc(&adapter->running_cap_crqs); 2426 ibmvnic_send_crq(adapter, &crq); 2427 2428 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 2429 atomic_inc(&adapter->running_cap_crqs); 2430 ibmvnic_send_crq(adapter, &crq); 2431 2432 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 2433 atomic_inc(&adapter->running_cap_crqs); 2434 ibmvnic_send_crq(adapter, &crq); 2435 2436 crq.query_capability.capability = 2437 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 2438 atomic_inc(&adapter->running_cap_crqs); 2439 ibmvnic_send_crq(adapter, &crq); 2440 2441 crq.query_capability.capability = 2442 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 2443 atomic_inc(&adapter->running_cap_crqs); 2444 ibmvnic_send_crq(adapter, &crq); 2445 2446 crq.query_capability.capability = 2447 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 2448 atomic_inc(&adapter->running_cap_crqs); 2449 ibmvnic_send_crq(adapter, &crq); 2450 2451 crq.query_capability.capability = 2452 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 2453 atomic_inc(&adapter->running_cap_crqs); 2454 ibmvnic_send_crq(adapter, &crq); 2455 2456 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 2457 atomic_inc(&adapter->running_cap_crqs); 2458 ibmvnic_send_crq(adapter, &crq); 2459 2460 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 2461 atomic_inc(&adapter->running_cap_crqs); 2462 ibmvnic_send_crq(adapter, &crq); 2463 2464 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 2465 atomic_inc(&adapter->running_cap_crqs); 2466 ibmvnic_send_crq(adapter, &crq); 2467 2468 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 2469 atomic_inc(&adapter->running_cap_crqs); 2470 ibmvnic_send_crq(adapter, &crq); 2471 2472 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 2473 atomic_inc(&adapter->running_cap_crqs); 2474 ibmvnic_send_crq(adapter, &crq); 2475 2476 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 2477 atomic_inc(&adapter->running_cap_crqs); 2478 ibmvnic_send_crq(adapter, &crq); 2479 2480 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 2481 atomic_inc(&adapter->running_cap_crqs); 2482 ibmvnic_send_crq(adapter, &crq); 2483 2484 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 2485 atomic_inc(&adapter->running_cap_crqs); 2486 ibmvnic_send_crq(adapter, &crq); 2487 2488 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 2489 atomic_inc(&adapter->running_cap_crqs); 2490 ibmvnic_send_crq(adapter, &crq); 2491 2492 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 2493 atomic_inc(&adapter->running_cap_crqs); 2494 ibmvnic_send_crq(adapter, &crq); 2495 2496 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 2497 atomic_inc(&adapter->running_cap_crqs); 2498 ibmvnic_send_crq(adapter, &crq); 2499 2500 crq.query_capability.capability = 2501 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 2502 atomic_inc(&adapter->running_cap_crqs); 2503 ibmvnic_send_crq(adapter, &crq); 2504 2505 crq.query_capability.capability = 2506 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 2507 atomic_inc(&adapter->running_cap_crqs); 2508 ibmvnic_send_crq(adapter, &crq); 2509 2510 crq.query_capability.capability = 2511 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 2512 atomic_inc(&adapter->running_cap_crqs); 2513 ibmvnic_send_crq(adapter, &crq); 2514 2515 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 2516 atomic_inc(&adapter->running_cap_crqs); 2517 ibmvnic_send_crq(adapter, &crq); 2518 } 2519 2520 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 2521 { 2522 struct device *dev = &adapter->vdev->dev; 2523 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 2524 union ibmvnic_crq crq; 2525 int i; 2526 2527 dma_unmap_single(dev, adapter->ip_offload_tok, 2528 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 2529 2530 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 2531 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 2532 netdev_dbg(adapter->netdev, "%016lx\n", 2533 ((unsigned long int *)(buf))[i]); 2534 2535 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 2536 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 2537 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 2538 buf->tcp_ipv4_chksum); 2539 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 2540 buf->tcp_ipv6_chksum); 2541 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 2542 buf->udp_ipv4_chksum); 2543 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 2544 buf->udp_ipv6_chksum); 2545 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 2546 buf->large_tx_ipv4); 2547 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 2548 buf->large_tx_ipv6); 2549 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 2550 buf->large_rx_ipv4); 2551 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 2552 buf->large_rx_ipv6); 2553 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 2554 buf->max_ipv4_header_size); 2555 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 2556 buf->max_ipv6_header_size); 2557 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 2558 buf->max_tcp_header_size); 2559 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 2560 buf->max_udp_header_size); 2561 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 2562 buf->max_large_tx_size); 2563 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 2564 buf->max_large_rx_size); 2565 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 2566 buf->ipv6_extension_header); 2567 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 2568 buf->tcp_pseudosum_req); 2569 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 2570 buf->num_ipv6_ext_headers); 2571 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 2572 buf->off_ipv6_ext_headers); 2573 2574 adapter->ip_offload_ctrl_tok = 2575 dma_map_single(dev, &adapter->ip_offload_ctrl, 2576 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 2577 2578 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 2579 dev_err(dev, "Couldn't map ip offload control buffer\n"); 2580 return; 2581 } 2582 2583 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 2584 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 2585 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 2586 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 2587 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 2588 2589 /* large_tx/rx disabled for now, additional features needed */ 2590 adapter->ip_offload_ctrl.large_tx_ipv4 = 0; 2591 adapter->ip_offload_ctrl.large_tx_ipv6 = 0; 2592 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 2593 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 2594 2595 adapter->netdev->features = NETIF_F_GSO; 2596 2597 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 2598 adapter->netdev->features |= NETIF_F_IP_CSUM; 2599 2600 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 2601 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 2602 2603 if ((adapter->netdev->features & 2604 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 2605 adapter->netdev->features |= NETIF_F_RXCSUM; 2606 2607 memset(&crq, 0, sizeof(crq)); 2608 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 2609 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 2610 crq.control_ip_offload.len = 2611 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 2612 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 2613 ibmvnic_send_crq(adapter, &crq); 2614 } 2615 2616 static void handle_error_info_rsp(union ibmvnic_crq *crq, 2617 struct ibmvnic_adapter *adapter) 2618 { 2619 struct device *dev = &adapter->vdev->dev; 2620 struct ibmvnic_error_buff *error_buff, *tmp; 2621 unsigned long flags; 2622 bool found = false; 2623 int i; 2624 2625 if (!crq->request_error_rsp.rc.code) { 2626 dev_info(dev, "Request Error Rsp returned with rc=%x\n", 2627 crq->request_error_rsp.rc.code); 2628 return; 2629 } 2630 2631 spin_lock_irqsave(&adapter->error_list_lock, flags); 2632 list_for_each_entry_safe(error_buff, tmp, &adapter->errors, list) 2633 if (error_buff->error_id == crq->request_error_rsp.error_id) { 2634 found = true; 2635 list_del(&error_buff->list); 2636 break; 2637 } 2638 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2639 2640 if (!found) { 2641 dev_err(dev, "Couldn't find error id %x\n", 2642 be32_to_cpu(crq->request_error_rsp.error_id)); 2643 return; 2644 } 2645 2646 dev_err(dev, "Detailed info for error id %x:", 2647 be32_to_cpu(crq->request_error_rsp.error_id)); 2648 2649 for (i = 0; i < error_buff->len; i++) { 2650 pr_cont("%02x", (int)error_buff->buff[i]); 2651 if (i % 8 == 7) 2652 pr_cont(" "); 2653 } 2654 pr_cont("\n"); 2655 2656 dma_unmap_single(dev, error_buff->dma, error_buff->len, 2657 DMA_FROM_DEVICE); 2658 kfree(error_buff->buff); 2659 kfree(error_buff); 2660 } 2661 2662 static void request_error_information(struct ibmvnic_adapter *adapter, 2663 union ibmvnic_crq *err_crq) 2664 { 2665 struct device *dev = &adapter->vdev->dev; 2666 struct net_device *netdev = adapter->netdev; 2667 struct ibmvnic_error_buff *error_buff; 2668 unsigned long timeout = msecs_to_jiffies(30000); 2669 union ibmvnic_crq crq; 2670 unsigned long flags; 2671 int rc, detail_len; 2672 2673 error_buff = kmalloc(sizeof(*error_buff), GFP_ATOMIC); 2674 if (!error_buff) 2675 return; 2676 2677 detail_len = be32_to_cpu(err_crq->error_indication.detail_error_sz); 2678 error_buff->buff = kmalloc(detail_len, GFP_ATOMIC); 2679 if (!error_buff->buff) { 2680 kfree(error_buff); 2681 return; 2682 } 2683 2684 error_buff->dma = dma_map_single(dev, error_buff->buff, detail_len, 2685 DMA_FROM_DEVICE); 2686 if (dma_mapping_error(dev, error_buff->dma)) { 2687 netdev_err(netdev, "Couldn't map error buffer\n"); 2688 kfree(error_buff->buff); 2689 kfree(error_buff); 2690 return; 2691 } 2692 2693 error_buff->len = detail_len; 2694 error_buff->error_id = err_crq->error_indication.error_id; 2695 2696 spin_lock_irqsave(&adapter->error_list_lock, flags); 2697 list_add_tail(&error_buff->list, &adapter->errors); 2698 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2699 2700 memset(&crq, 0, sizeof(crq)); 2701 crq.request_error_info.first = IBMVNIC_CRQ_CMD; 2702 crq.request_error_info.cmd = REQUEST_ERROR_INFO; 2703 crq.request_error_info.ioba = cpu_to_be32(error_buff->dma); 2704 crq.request_error_info.len = cpu_to_be32(detail_len); 2705 crq.request_error_info.error_id = err_crq->error_indication.error_id; 2706 2707 rc = ibmvnic_send_crq(adapter, &crq); 2708 if (rc) { 2709 netdev_err(netdev, "failed to request error information\n"); 2710 goto err_info_fail; 2711 } 2712 2713 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 2714 netdev_err(netdev, "timeout waiting for error information\n"); 2715 goto err_info_fail; 2716 } 2717 2718 return; 2719 2720 err_info_fail: 2721 spin_lock_irqsave(&adapter->error_list_lock, flags); 2722 list_del(&error_buff->list); 2723 spin_unlock_irqrestore(&adapter->error_list_lock, flags); 2724 2725 kfree(error_buff->buff); 2726 kfree(error_buff); 2727 } 2728 2729 static void handle_error_indication(union ibmvnic_crq *crq, 2730 struct ibmvnic_adapter *adapter) 2731 { 2732 struct device *dev = &adapter->vdev->dev; 2733 2734 dev_err(dev, "Firmware reports %serror id %x, cause %d\n", 2735 crq->error_indication.flags 2736 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 2737 be32_to_cpu(crq->error_indication.error_id), 2738 be16_to_cpu(crq->error_indication.error_cause)); 2739 2740 if (be32_to_cpu(crq->error_indication.error_id)) 2741 request_error_information(adapter, crq); 2742 2743 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 2744 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 2745 } 2746 2747 static void handle_change_mac_rsp(union ibmvnic_crq *crq, 2748 struct ibmvnic_adapter *adapter) 2749 { 2750 struct net_device *netdev = adapter->netdev; 2751 struct device *dev = &adapter->vdev->dev; 2752 long rc; 2753 2754 rc = crq->change_mac_addr_rsp.rc.code; 2755 if (rc) { 2756 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 2757 return; 2758 } 2759 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 2760 ETH_ALEN); 2761 } 2762 2763 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 2764 struct ibmvnic_adapter *adapter) 2765 { 2766 struct device *dev = &adapter->vdev->dev; 2767 u64 *req_value; 2768 char *name; 2769 2770 atomic_dec(&adapter->running_cap_crqs); 2771 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 2772 case REQ_TX_QUEUES: 2773 req_value = &adapter->req_tx_queues; 2774 name = "tx"; 2775 break; 2776 case REQ_RX_QUEUES: 2777 req_value = &adapter->req_rx_queues; 2778 name = "rx"; 2779 break; 2780 case REQ_RX_ADD_QUEUES: 2781 req_value = &adapter->req_rx_add_queues; 2782 name = "rx_add"; 2783 break; 2784 case REQ_TX_ENTRIES_PER_SUBCRQ: 2785 req_value = &adapter->req_tx_entries_per_subcrq; 2786 name = "tx_entries_per_subcrq"; 2787 break; 2788 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 2789 req_value = &adapter->req_rx_add_entries_per_subcrq; 2790 name = "rx_add_entries_per_subcrq"; 2791 break; 2792 case REQ_MTU: 2793 req_value = &adapter->req_mtu; 2794 name = "mtu"; 2795 break; 2796 case PROMISC_REQUESTED: 2797 req_value = &adapter->promisc; 2798 name = "promisc"; 2799 break; 2800 default: 2801 dev_err(dev, "Got invalid cap request rsp %d\n", 2802 crq->request_capability.capability); 2803 return; 2804 } 2805 2806 switch (crq->request_capability_rsp.rc.code) { 2807 case SUCCESS: 2808 break; 2809 case PARTIALSUCCESS: 2810 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 2811 *req_value, 2812 (long int)be64_to_cpu(crq->request_capability_rsp. 2813 number), name); 2814 release_sub_crqs(adapter); 2815 *req_value = be64_to_cpu(crq->request_capability_rsp.number); 2816 ibmvnic_send_req_caps(adapter, 1); 2817 return; 2818 default: 2819 dev_err(dev, "Error %d in request cap rsp\n", 2820 crq->request_capability_rsp.rc.code); 2821 return; 2822 } 2823 2824 /* Done receiving requested capabilities, query IP offload support */ 2825 if (atomic_read(&adapter->running_cap_crqs) == 0) { 2826 union ibmvnic_crq newcrq; 2827 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 2828 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 2829 &adapter->ip_offload_buf; 2830 2831 adapter->wait_capability = false; 2832 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 2833 buf_sz, 2834 DMA_FROM_DEVICE); 2835 2836 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 2837 if (!firmware_has_feature(FW_FEATURE_CMO)) 2838 dev_err(dev, "Couldn't map offload buffer\n"); 2839 return; 2840 } 2841 2842 memset(&newcrq, 0, sizeof(newcrq)); 2843 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 2844 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 2845 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 2846 newcrq.query_ip_offload.ioba = 2847 cpu_to_be32(adapter->ip_offload_tok); 2848 2849 ibmvnic_send_crq(adapter, &newcrq); 2850 } 2851 } 2852 2853 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 2854 struct ibmvnic_adapter *adapter) 2855 { 2856 struct device *dev = &adapter->vdev->dev; 2857 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 2858 struct ibmvnic_login_buffer *login = adapter->login_buf; 2859 int i; 2860 2861 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 2862 DMA_BIDIRECTIONAL); 2863 dma_unmap_single(dev, adapter->login_rsp_buf_token, 2864 adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); 2865 2866 /* If the number of queues requested can't be allocated by the 2867 * server, the login response will return with code 1. We will need 2868 * to resend the login buffer with fewer queues requested. 2869 */ 2870 if (login_rsp_crq->generic.rc.code) { 2871 adapter->renegotiate = true; 2872 complete(&adapter->init_done); 2873 return 0; 2874 } 2875 2876 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 2877 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 2878 netdev_dbg(adapter->netdev, "%016lx\n", 2879 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 2880 } 2881 2882 /* Sanity checks */ 2883 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 2884 (be32_to_cpu(login->num_rxcomp_subcrqs) * 2885 adapter->req_rx_add_queues != 2886 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 2887 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 2888 ibmvnic_remove(adapter->vdev); 2889 return -EIO; 2890 } 2891 complete(&adapter->init_done); 2892 2893 return 0; 2894 } 2895 2896 static void handle_request_map_rsp(union ibmvnic_crq *crq, 2897 struct ibmvnic_adapter *adapter) 2898 { 2899 struct device *dev = &adapter->vdev->dev; 2900 u8 map_id = crq->request_map_rsp.map_id; 2901 int tx_subcrqs; 2902 int rx_subcrqs; 2903 long rc; 2904 int i; 2905 2906 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 2907 rx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 2908 2909 rc = crq->request_map_rsp.rc.code; 2910 if (rc) { 2911 dev_err(dev, "Error %ld in REQUEST_MAP_RSP\n", rc); 2912 adapter->map_id--; 2913 /* need to find and zero tx/rx_pool map_id */ 2914 for (i = 0; i < tx_subcrqs; i++) { 2915 if (adapter->tx_pool[i].long_term_buff.map_id == map_id) 2916 adapter->tx_pool[i].long_term_buff.map_id = 0; 2917 } 2918 for (i = 0; i < rx_subcrqs; i++) { 2919 if (adapter->rx_pool[i].long_term_buff.map_id == map_id) 2920 adapter->rx_pool[i].long_term_buff.map_id = 0; 2921 } 2922 } 2923 complete(&adapter->fw_done); 2924 } 2925 2926 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 2927 struct ibmvnic_adapter *adapter) 2928 { 2929 struct device *dev = &adapter->vdev->dev; 2930 long rc; 2931 2932 rc = crq->request_unmap_rsp.rc.code; 2933 if (rc) 2934 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 2935 } 2936 2937 static void handle_query_map_rsp(union ibmvnic_crq *crq, 2938 struct ibmvnic_adapter *adapter) 2939 { 2940 struct net_device *netdev = adapter->netdev; 2941 struct device *dev = &adapter->vdev->dev; 2942 long rc; 2943 2944 rc = crq->query_map_rsp.rc.code; 2945 if (rc) { 2946 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 2947 return; 2948 } 2949 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 2950 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 2951 crq->query_map_rsp.free_pages); 2952 } 2953 2954 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 2955 struct ibmvnic_adapter *adapter) 2956 { 2957 struct net_device *netdev = adapter->netdev; 2958 struct device *dev = &adapter->vdev->dev; 2959 long rc; 2960 2961 atomic_dec(&adapter->running_cap_crqs); 2962 netdev_dbg(netdev, "Outstanding queries: %d\n", 2963 atomic_read(&adapter->running_cap_crqs)); 2964 rc = crq->query_capability.rc.code; 2965 if (rc) { 2966 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 2967 goto out; 2968 } 2969 2970 switch (be16_to_cpu(crq->query_capability.capability)) { 2971 case MIN_TX_QUEUES: 2972 adapter->min_tx_queues = 2973 be64_to_cpu(crq->query_capability.number); 2974 netdev_dbg(netdev, "min_tx_queues = %lld\n", 2975 adapter->min_tx_queues); 2976 break; 2977 case MIN_RX_QUEUES: 2978 adapter->min_rx_queues = 2979 be64_to_cpu(crq->query_capability.number); 2980 netdev_dbg(netdev, "min_rx_queues = %lld\n", 2981 adapter->min_rx_queues); 2982 break; 2983 case MIN_RX_ADD_QUEUES: 2984 adapter->min_rx_add_queues = 2985 be64_to_cpu(crq->query_capability.number); 2986 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 2987 adapter->min_rx_add_queues); 2988 break; 2989 case MAX_TX_QUEUES: 2990 adapter->max_tx_queues = 2991 be64_to_cpu(crq->query_capability.number); 2992 netdev_dbg(netdev, "max_tx_queues = %lld\n", 2993 adapter->max_tx_queues); 2994 break; 2995 case MAX_RX_QUEUES: 2996 adapter->max_rx_queues = 2997 be64_to_cpu(crq->query_capability.number); 2998 netdev_dbg(netdev, "max_rx_queues = %lld\n", 2999 adapter->max_rx_queues); 3000 break; 3001 case MAX_RX_ADD_QUEUES: 3002 adapter->max_rx_add_queues = 3003 be64_to_cpu(crq->query_capability.number); 3004 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 3005 adapter->max_rx_add_queues); 3006 break; 3007 case MIN_TX_ENTRIES_PER_SUBCRQ: 3008 adapter->min_tx_entries_per_subcrq = 3009 be64_to_cpu(crq->query_capability.number); 3010 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 3011 adapter->min_tx_entries_per_subcrq); 3012 break; 3013 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 3014 adapter->min_rx_add_entries_per_subcrq = 3015 be64_to_cpu(crq->query_capability.number); 3016 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 3017 adapter->min_rx_add_entries_per_subcrq); 3018 break; 3019 case MAX_TX_ENTRIES_PER_SUBCRQ: 3020 adapter->max_tx_entries_per_subcrq = 3021 be64_to_cpu(crq->query_capability.number); 3022 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 3023 adapter->max_tx_entries_per_subcrq); 3024 break; 3025 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 3026 adapter->max_rx_add_entries_per_subcrq = 3027 be64_to_cpu(crq->query_capability.number); 3028 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 3029 adapter->max_rx_add_entries_per_subcrq); 3030 break; 3031 case TCP_IP_OFFLOAD: 3032 adapter->tcp_ip_offload = 3033 be64_to_cpu(crq->query_capability.number); 3034 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 3035 adapter->tcp_ip_offload); 3036 break; 3037 case PROMISC_SUPPORTED: 3038 adapter->promisc_supported = 3039 be64_to_cpu(crq->query_capability.number); 3040 netdev_dbg(netdev, "promisc_supported = %lld\n", 3041 adapter->promisc_supported); 3042 break; 3043 case MIN_MTU: 3044 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 3045 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3046 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 3047 break; 3048 case MAX_MTU: 3049 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 3050 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3051 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 3052 break; 3053 case MAX_MULTICAST_FILTERS: 3054 adapter->max_multicast_filters = 3055 be64_to_cpu(crq->query_capability.number); 3056 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 3057 adapter->max_multicast_filters); 3058 break; 3059 case VLAN_HEADER_INSERTION: 3060 adapter->vlan_header_insertion = 3061 be64_to_cpu(crq->query_capability.number); 3062 if (adapter->vlan_header_insertion) 3063 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 3064 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 3065 adapter->vlan_header_insertion); 3066 break; 3067 case RX_VLAN_HEADER_INSERTION: 3068 adapter->rx_vlan_header_insertion = 3069 be64_to_cpu(crq->query_capability.number); 3070 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 3071 adapter->rx_vlan_header_insertion); 3072 break; 3073 case MAX_TX_SG_ENTRIES: 3074 adapter->max_tx_sg_entries = 3075 be64_to_cpu(crq->query_capability.number); 3076 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 3077 adapter->max_tx_sg_entries); 3078 break; 3079 case RX_SG_SUPPORTED: 3080 adapter->rx_sg_supported = 3081 be64_to_cpu(crq->query_capability.number); 3082 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 3083 adapter->rx_sg_supported); 3084 break; 3085 case OPT_TX_COMP_SUB_QUEUES: 3086 adapter->opt_tx_comp_sub_queues = 3087 be64_to_cpu(crq->query_capability.number); 3088 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 3089 adapter->opt_tx_comp_sub_queues); 3090 break; 3091 case OPT_RX_COMP_QUEUES: 3092 adapter->opt_rx_comp_queues = 3093 be64_to_cpu(crq->query_capability.number); 3094 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 3095 adapter->opt_rx_comp_queues); 3096 break; 3097 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 3098 adapter->opt_rx_bufadd_q_per_rx_comp_q = 3099 be64_to_cpu(crq->query_capability.number); 3100 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 3101 adapter->opt_rx_bufadd_q_per_rx_comp_q); 3102 break; 3103 case OPT_TX_ENTRIES_PER_SUBCRQ: 3104 adapter->opt_tx_entries_per_subcrq = 3105 be64_to_cpu(crq->query_capability.number); 3106 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 3107 adapter->opt_tx_entries_per_subcrq); 3108 break; 3109 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 3110 adapter->opt_rxba_entries_per_subcrq = 3111 be64_to_cpu(crq->query_capability.number); 3112 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 3113 adapter->opt_rxba_entries_per_subcrq); 3114 break; 3115 case TX_RX_DESC_REQ: 3116 adapter->tx_rx_desc_req = crq->query_capability.number; 3117 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 3118 adapter->tx_rx_desc_req); 3119 break; 3120 3121 default: 3122 netdev_err(netdev, "Got invalid cap rsp %d\n", 3123 crq->query_capability.capability); 3124 } 3125 3126 out: 3127 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3128 adapter->wait_capability = false; 3129 ibmvnic_send_req_caps(adapter, 0); 3130 } 3131 } 3132 3133 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 3134 struct ibmvnic_adapter *adapter) 3135 { 3136 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 3137 struct net_device *netdev = adapter->netdev; 3138 struct device *dev = &adapter->vdev->dev; 3139 u64 *u64_crq = (u64 *)crq; 3140 long rc; 3141 3142 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 3143 (unsigned long int)cpu_to_be64(u64_crq[0]), 3144 (unsigned long int)cpu_to_be64(u64_crq[1])); 3145 switch (gen_crq->first) { 3146 case IBMVNIC_CRQ_INIT_RSP: 3147 switch (gen_crq->cmd) { 3148 case IBMVNIC_CRQ_INIT: 3149 dev_info(dev, "Partner initialized\n"); 3150 break; 3151 case IBMVNIC_CRQ_INIT_COMPLETE: 3152 dev_info(dev, "Partner initialization complete\n"); 3153 send_version_xchg(adapter); 3154 break; 3155 default: 3156 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 3157 } 3158 return; 3159 case IBMVNIC_CRQ_XPORT_EVENT: 3160 netif_carrier_off(netdev); 3161 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 3162 dev_info(dev, "Migrated, re-enabling adapter\n"); 3163 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 3164 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 3165 dev_info(dev, "Backing device failover detected\n"); 3166 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 3167 } else { 3168 /* The adapter lost the connection */ 3169 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 3170 gen_crq->cmd); 3171 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3172 } 3173 return; 3174 case IBMVNIC_CRQ_CMD_RSP: 3175 break; 3176 default: 3177 dev_err(dev, "Got an invalid msg type 0x%02x\n", 3178 gen_crq->first); 3179 return; 3180 } 3181 3182 switch (gen_crq->cmd) { 3183 case VERSION_EXCHANGE_RSP: 3184 rc = crq->version_exchange_rsp.rc.code; 3185 if (rc) { 3186 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 3187 break; 3188 } 3189 dev_info(dev, "Partner protocol version is %d\n", 3190 crq->version_exchange_rsp.version); 3191 if (be16_to_cpu(crq->version_exchange_rsp.version) < 3192 ibmvnic_version) 3193 ibmvnic_version = 3194 be16_to_cpu(crq->version_exchange_rsp.version); 3195 send_cap_queries(adapter); 3196 break; 3197 case QUERY_CAPABILITY_RSP: 3198 handle_query_cap_rsp(crq, adapter); 3199 break; 3200 case QUERY_MAP_RSP: 3201 handle_query_map_rsp(crq, adapter); 3202 break; 3203 case REQUEST_MAP_RSP: 3204 handle_request_map_rsp(crq, adapter); 3205 break; 3206 case REQUEST_UNMAP_RSP: 3207 handle_request_unmap_rsp(crq, adapter); 3208 break; 3209 case REQUEST_CAPABILITY_RSP: 3210 handle_request_cap_rsp(crq, adapter); 3211 break; 3212 case LOGIN_RSP: 3213 netdev_dbg(netdev, "Got Login Response\n"); 3214 handle_login_rsp(crq, adapter); 3215 break; 3216 case LOGICAL_LINK_STATE_RSP: 3217 netdev_dbg(netdev, 3218 "Got Logical Link State Response, state: %d rc: %d\n", 3219 crq->logical_link_state_rsp.link_state, 3220 crq->logical_link_state_rsp.rc.code); 3221 adapter->logical_link_state = 3222 crq->logical_link_state_rsp.link_state; 3223 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 3224 complete(&adapter->init_done); 3225 break; 3226 case LINK_STATE_INDICATION: 3227 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 3228 adapter->phys_link_state = 3229 crq->link_state_indication.phys_link_state; 3230 adapter->logical_link_state = 3231 crq->link_state_indication.logical_link_state; 3232 break; 3233 case CHANGE_MAC_ADDR_RSP: 3234 netdev_dbg(netdev, "Got MAC address change Response\n"); 3235 handle_change_mac_rsp(crq, adapter); 3236 break; 3237 case ERROR_INDICATION: 3238 netdev_dbg(netdev, "Got Error Indication\n"); 3239 handle_error_indication(crq, adapter); 3240 break; 3241 case REQUEST_ERROR_RSP: 3242 netdev_dbg(netdev, "Got Error Detail Response\n"); 3243 handle_error_info_rsp(crq, adapter); 3244 break; 3245 case REQUEST_STATISTICS_RSP: 3246 netdev_dbg(netdev, "Got Statistics Response\n"); 3247 complete(&adapter->stats_done); 3248 break; 3249 case QUERY_IP_OFFLOAD_RSP: 3250 netdev_dbg(netdev, "Got Query IP offload Response\n"); 3251 handle_query_ip_offload_rsp(adapter); 3252 break; 3253 case MULTICAST_CTRL_RSP: 3254 netdev_dbg(netdev, "Got multicast control Response\n"); 3255 break; 3256 case CONTROL_IP_OFFLOAD_RSP: 3257 netdev_dbg(netdev, "Got Control IP offload Response\n"); 3258 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 3259 sizeof(adapter->ip_offload_ctrl), 3260 DMA_TO_DEVICE); 3261 complete(&adapter->init_done); 3262 break; 3263 case COLLECT_FW_TRACE_RSP: 3264 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 3265 complete(&adapter->fw_done); 3266 break; 3267 default: 3268 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 3269 gen_crq->cmd); 3270 } 3271 } 3272 3273 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 3274 { 3275 struct ibmvnic_adapter *adapter = instance; 3276 3277 tasklet_schedule(&adapter->tasklet); 3278 return IRQ_HANDLED; 3279 } 3280 3281 static void ibmvnic_tasklet(void *data) 3282 { 3283 struct ibmvnic_adapter *adapter = data; 3284 struct ibmvnic_crq_queue *queue = &adapter->crq; 3285 union ibmvnic_crq *crq; 3286 unsigned long flags; 3287 bool done = false; 3288 3289 spin_lock_irqsave(&queue->lock, flags); 3290 while (!done) { 3291 /* Pull all the valid messages off the CRQ */ 3292 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 3293 ibmvnic_handle_crq(crq, adapter); 3294 crq->generic.first = 0; 3295 } 3296 3297 /* remain in tasklet until all 3298 * capabilities responses are received 3299 */ 3300 if (!adapter->wait_capability) 3301 done = true; 3302 } 3303 /* if capabilities CRQ's were sent in this tasklet, the following 3304 * tasklet must wait until all responses are received 3305 */ 3306 if (atomic_read(&adapter->running_cap_crqs) != 0) 3307 adapter->wait_capability = true; 3308 spin_unlock_irqrestore(&queue->lock, flags); 3309 } 3310 3311 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 3312 { 3313 struct vio_dev *vdev = adapter->vdev; 3314 int rc; 3315 3316 do { 3317 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 3318 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3319 3320 if (rc) 3321 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 3322 3323 return rc; 3324 } 3325 3326 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 3327 { 3328 struct ibmvnic_crq_queue *crq = &adapter->crq; 3329 struct device *dev = &adapter->vdev->dev; 3330 struct vio_dev *vdev = adapter->vdev; 3331 int rc; 3332 3333 /* Close the CRQ */ 3334 do { 3335 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3336 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3337 3338 /* Clean out the queue */ 3339 memset(crq->msgs, 0, PAGE_SIZE); 3340 crq->cur = 0; 3341 3342 /* And re-open it again */ 3343 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3344 crq->msg_token, PAGE_SIZE); 3345 3346 if (rc == H_CLOSED) 3347 /* Adapter is good, but other end is not ready */ 3348 dev_warn(dev, "Partner adapter not ready\n"); 3349 else if (rc != 0) 3350 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 3351 3352 return rc; 3353 } 3354 3355 static void release_crq_queue(struct ibmvnic_adapter *adapter) 3356 { 3357 struct ibmvnic_crq_queue *crq = &adapter->crq; 3358 struct vio_dev *vdev = adapter->vdev; 3359 long rc; 3360 3361 if (!crq->msgs) 3362 return; 3363 3364 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 3365 free_irq(vdev->irq, adapter); 3366 tasklet_kill(&adapter->tasklet); 3367 do { 3368 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3369 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3370 3371 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 3372 DMA_BIDIRECTIONAL); 3373 free_page((unsigned long)crq->msgs); 3374 crq->msgs = NULL; 3375 } 3376 3377 static int init_crq_queue(struct ibmvnic_adapter *adapter) 3378 { 3379 struct ibmvnic_crq_queue *crq = &adapter->crq; 3380 struct device *dev = &adapter->vdev->dev; 3381 struct vio_dev *vdev = adapter->vdev; 3382 int rc, retrc = -ENOMEM; 3383 3384 if (crq->msgs) 3385 return 0; 3386 3387 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 3388 /* Should we allocate more than one page? */ 3389 3390 if (!crq->msgs) 3391 return -ENOMEM; 3392 3393 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 3394 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 3395 DMA_BIDIRECTIONAL); 3396 if (dma_mapping_error(dev, crq->msg_token)) 3397 goto map_failed; 3398 3399 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 3400 crq->msg_token, PAGE_SIZE); 3401 3402 if (rc == H_RESOURCE) 3403 /* maybe kexecing and resource is busy. try a reset */ 3404 rc = ibmvnic_reset_crq(adapter); 3405 retrc = rc; 3406 3407 if (rc == H_CLOSED) { 3408 dev_warn(dev, "Partner adapter not ready\n"); 3409 } else if (rc) { 3410 dev_warn(dev, "Error %d opening adapter\n", rc); 3411 goto reg_crq_failed; 3412 } 3413 3414 retrc = 0; 3415 3416 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 3417 (unsigned long)adapter); 3418 3419 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 3420 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 3421 adapter); 3422 if (rc) { 3423 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 3424 vdev->irq, rc); 3425 goto req_irq_failed; 3426 } 3427 3428 rc = vio_enable_interrupts(vdev); 3429 if (rc) { 3430 dev_err(dev, "Error %d enabling interrupts\n", rc); 3431 goto req_irq_failed; 3432 } 3433 3434 crq->cur = 0; 3435 spin_lock_init(&crq->lock); 3436 3437 return retrc; 3438 3439 req_irq_failed: 3440 tasklet_kill(&adapter->tasklet); 3441 do { 3442 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 3443 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3444 reg_crq_failed: 3445 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 3446 map_failed: 3447 free_page((unsigned long)crq->msgs); 3448 crq->msgs = NULL; 3449 return retrc; 3450 } 3451 3452 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 3453 { 3454 struct device *dev = &adapter->vdev->dev; 3455 unsigned long timeout = msecs_to_jiffies(30000); 3456 int rc; 3457 3458 rc = init_crq_queue(adapter); 3459 if (rc) { 3460 dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); 3461 return rc; 3462 } 3463 3464 init_completion(&adapter->init_done); 3465 ibmvnic_send_crq_init(adapter); 3466 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3467 dev_err(dev, "Initialization sequence timed out\n"); 3468 release_crq_queue(adapter); 3469 return -1; 3470 } 3471 3472 rc = init_sub_crqs(adapter); 3473 if (rc) { 3474 dev_err(dev, "Initialization of sub crqs failed\n"); 3475 release_crq_queue(adapter); 3476 } 3477 3478 return rc; 3479 } 3480 3481 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 3482 { 3483 struct ibmvnic_adapter *adapter; 3484 struct net_device *netdev; 3485 unsigned char *mac_addr_p; 3486 int rc; 3487 3488 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 3489 dev->unit_address); 3490 3491 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 3492 VETH_MAC_ADDR, NULL); 3493 if (!mac_addr_p) { 3494 dev_err(&dev->dev, 3495 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 3496 __FILE__, __LINE__); 3497 return 0; 3498 } 3499 3500 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 3501 IBMVNIC_MAX_TX_QUEUES); 3502 if (!netdev) 3503 return -ENOMEM; 3504 3505 adapter = netdev_priv(netdev); 3506 adapter->state = VNIC_PROBING; 3507 dev_set_drvdata(&dev->dev, netdev); 3508 adapter->vdev = dev; 3509 adapter->netdev = netdev; 3510 3511 ether_addr_copy(adapter->mac_addr, mac_addr_p); 3512 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 3513 netdev->irq = dev->irq; 3514 netdev->netdev_ops = &ibmvnic_netdev_ops; 3515 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 3516 SET_NETDEV_DEV(netdev, &dev->dev); 3517 3518 spin_lock_init(&adapter->stats_lock); 3519 3520 INIT_LIST_HEAD(&adapter->errors); 3521 spin_lock_init(&adapter->error_list_lock); 3522 3523 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 3524 INIT_LIST_HEAD(&adapter->rwi_list); 3525 mutex_init(&adapter->reset_lock); 3526 mutex_init(&adapter->rwi_lock); 3527 adapter->resetting = false; 3528 3529 rc = ibmvnic_init(adapter); 3530 if (rc) { 3531 free_netdev(netdev); 3532 return rc; 3533 } 3534 3535 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3536 3537 rc = register_netdev(netdev); 3538 if (rc) { 3539 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 3540 free_netdev(netdev); 3541 return rc; 3542 } 3543 dev_info(&dev->dev, "ibmvnic registered\n"); 3544 3545 adapter->state = VNIC_PROBED; 3546 return 0; 3547 } 3548 3549 static int ibmvnic_remove(struct vio_dev *dev) 3550 { 3551 struct net_device *netdev = dev_get_drvdata(&dev->dev); 3552 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3553 3554 adapter->state = VNIC_REMOVING; 3555 unregister_netdev(netdev); 3556 mutex_lock(&adapter->reset_lock); 3557 3558 release_resources(adapter); 3559 release_sub_crqs(adapter); 3560 release_crq_queue(adapter); 3561 3562 adapter->state = VNIC_REMOVED; 3563 3564 mutex_unlock(&adapter->reset_lock); 3565 free_netdev(netdev); 3566 dev_set_drvdata(&dev->dev, NULL); 3567 3568 return 0; 3569 } 3570 3571 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 3572 { 3573 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 3574 struct ibmvnic_adapter *adapter; 3575 struct iommu_table *tbl; 3576 unsigned long ret = 0; 3577 int i; 3578 3579 tbl = get_iommu_table_base(&vdev->dev); 3580 3581 /* netdev inits at probe time along with the structures we need below*/ 3582 if (!netdev) 3583 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 3584 3585 adapter = netdev_priv(netdev); 3586 3587 ret += PAGE_SIZE; /* the crq message queue */ 3588 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 3589 3590 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 3591 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 3592 3593 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 3594 i++) 3595 ret += adapter->rx_pool[i].size * 3596 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 3597 3598 return ret; 3599 } 3600 3601 static int ibmvnic_resume(struct device *dev) 3602 { 3603 struct net_device *netdev = dev_get_drvdata(dev); 3604 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3605 int i; 3606 3607 /* kick the interrupt handlers just in case we lost an interrupt */ 3608 for (i = 0; i < adapter->req_rx_queues; i++) 3609 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 3610 adapter->rx_scrq[i]); 3611 3612 return 0; 3613 } 3614 3615 static struct vio_device_id ibmvnic_device_table[] = { 3616 {"network", "IBM,vnic"}, 3617 {"", "" } 3618 }; 3619 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 3620 3621 static const struct dev_pm_ops ibmvnic_pm_ops = { 3622 .resume = ibmvnic_resume 3623 }; 3624 3625 static struct vio_driver ibmvnic_driver = { 3626 .id_table = ibmvnic_device_table, 3627 .probe = ibmvnic_probe, 3628 .remove = ibmvnic_remove, 3629 .get_desired_dma = ibmvnic_get_desired_dma, 3630 .name = ibmvnic_driver_name, 3631 .pm = &ibmvnic_pm_ops, 3632 }; 3633 3634 /* module functions */ 3635 static int __init ibmvnic_module_init(void) 3636 { 3637 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 3638 IBMVNIC_DRIVER_VERSION); 3639 3640 return vio_register_driver(&ibmvnic_driver); 3641 } 3642 3643 static void __exit ibmvnic_module_exit(void) 3644 { 3645 vio_unregister_driver(&ibmvnic_driver); 3646 } 3647 3648 module_init(ibmvnic_module_init); 3649 module_exit(ibmvnic_module_exit); 3650