1 /**************************************************************************/ 2 /* */ 3 /* IBM System i and System p Virtual NIC Device Driver */ 4 /* Copyright (C) 2014 IBM Corp. */ 5 /* Santiago Leon (santi_leon@yahoo.com) */ 6 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 7 /* John Allen (jallen@linux.vnet.ibm.com) */ 8 /* */ 9 /* This program is free software; you can redistribute it and/or modify */ 10 /* it under the terms of the GNU General Public License as published by */ 11 /* the Free Software Foundation; either version 2 of the License, or */ 12 /* (at your option) any later version. */ 13 /* */ 14 /* This program is distributed in the hope that it will be useful, */ 15 /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ 16 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ 17 /* GNU General Public License for more details. */ 18 /* */ 19 /* You should have received a copy of the GNU General Public License */ 20 /* along with this program. */ 21 /* */ 22 /* This module contains the implementation of a virtual ethernet device */ 23 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 24 /* option of the RS/6000 Platform Architecture to interface with virtual */ 25 /* ethernet NICs that are presented to the partition by the hypervisor. */ 26 /* */ 27 /* Messages are passed between the VNIC driver and the VNIC server using */ 28 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 29 /* issue and receive commands that initiate communication with the server */ 30 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 31 /* are used by the driver to notify the server that a packet is */ 32 /* ready for transmission or that a buffer has been added to receive a */ 33 /* packet. Subsequently, sCRQs are used by the server to notify the */ 34 /* driver that a packet transmission has been completed or that a packet */ 35 /* has been received and placed in a waiting buffer. */ 36 /* */ 37 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 38 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 39 /* or receive has been completed, the VNIC driver is required to use */ 40 /* "long term mapping". This entails that large, continuous DMA mapped */ 41 /* buffers are allocated on driver initialization and these buffers are */ 42 /* then continuously reused to pass skbs to and from the VNIC server. */ 43 /* */ 44 /**************************************************************************/ 45 46 #include <linux/module.h> 47 #include <linux/moduleparam.h> 48 #include <linux/types.h> 49 #include <linux/errno.h> 50 #include <linux/completion.h> 51 #include <linux/ioport.h> 52 #include <linux/dma-mapping.h> 53 #include <linux/kernel.h> 54 #include <linux/netdevice.h> 55 #include <linux/etherdevice.h> 56 #include <linux/skbuff.h> 57 #include <linux/init.h> 58 #include <linux/delay.h> 59 #include <linux/mm.h> 60 #include <linux/ethtool.h> 61 #include <linux/proc_fs.h> 62 #include <linux/if_arp.h> 63 #include <linux/in.h> 64 #include <linux/ip.h> 65 #include <linux/ipv6.h> 66 #include <linux/irq.h> 67 #include <linux/kthread.h> 68 #include <linux/seq_file.h> 69 #include <linux/interrupt.h> 70 #include <net/net_namespace.h> 71 #include <asm/hvcall.h> 72 #include <linux/atomic.h> 73 #include <asm/vio.h> 74 #include <asm/iommu.h> 75 #include <linux/uaccess.h> 76 #include <asm/firmware.h> 77 #include <linux/workqueue.h> 78 #include <linux/if_vlan.h> 79 #include <linux/utsname.h> 80 81 #include "ibmvnic.h" 82 83 static const char ibmvnic_driver_name[] = "ibmvnic"; 84 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 85 86 MODULE_AUTHOR("Santiago Leon"); 87 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 88 MODULE_LICENSE("GPL"); 89 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 90 91 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 92 static int ibmvnic_remove(struct vio_dev *); 93 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 94 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 95 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 96 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 97 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 98 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 99 union sub_crq *sub_crq); 100 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 101 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 102 static int enable_scrq_irq(struct ibmvnic_adapter *, 103 struct ibmvnic_sub_crq_queue *); 104 static int disable_scrq_irq(struct ibmvnic_adapter *, 105 struct ibmvnic_sub_crq_queue *); 106 static int pending_scrq(struct ibmvnic_adapter *, 107 struct ibmvnic_sub_crq_queue *); 108 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 109 struct ibmvnic_sub_crq_queue *); 110 static int ibmvnic_poll(struct napi_struct *napi, int data); 111 static void send_map_query(struct ibmvnic_adapter *adapter); 112 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8); 113 static int send_request_unmap(struct ibmvnic_adapter *, u8); 114 static int send_login(struct ibmvnic_adapter *adapter); 115 static void send_cap_queries(struct ibmvnic_adapter *adapter); 116 static int init_sub_crqs(struct ibmvnic_adapter *); 117 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 118 static int ibmvnic_init(struct ibmvnic_adapter *); 119 static int ibmvnic_reset_init(struct ibmvnic_adapter *); 120 static void release_crq_queue(struct ibmvnic_adapter *); 121 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p); 122 static int init_crq_queue(struct ibmvnic_adapter *adapter); 123 124 struct ibmvnic_stat { 125 char name[ETH_GSTRING_LEN]; 126 int offset; 127 }; 128 129 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 130 offsetof(struct ibmvnic_statistics, stat)) 131 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + off))) 132 133 static const struct ibmvnic_stat ibmvnic_stats[] = { 134 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 135 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 136 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 137 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 138 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 139 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 140 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 141 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 142 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 143 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 144 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 145 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 146 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 147 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 148 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 149 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 150 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 151 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 152 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 153 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 154 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 155 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 156 }; 157 158 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 159 unsigned long length, unsigned long *number, 160 unsigned long *irq) 161 { 162 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 163 long rc; 164 165 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 166 *number = retbuf[0]; 167 *irq = retbuf[1]; 168 169 return rc; 170 } 171 172 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 173 struct ibmvnic_long_term_buff *ltb, int size) 174 { 175 struct device *dev = &adapter->vdev->dev; 176 int rc; 177 178 ltb->size = size; 179 ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr, 180 GFP_KERNEL); 181 182 if (!ltb->buff) { 183 dev_err(dev, "Couldn't alloc long term buffer\n"); 184 return -ENOMEM; 185 } 186 ltb->map_id = adapter->map_id; 187 adapter->map_id++; 188 189 init_completion(&adapter->fw_done); 190 rc = send_request_map(adapter, ltb->addr, 191 ltb->size, ltb->map_id); 192 if (rc) { 193 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 194 return rc; 195 } 196 wait_for_completion(&adapter->fw_done); 197 198 if (adapter->fw_done_rc) { 199 dev_err(dev, "Couldn't map long term buffer,rc = %d\n", 200 adapter->fw_done_rc); 201 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 202 return -1; 203 } 204 return 0; 205 } 206 207 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 208 struct ibmvnic_long_term_buff *ltb) 209 { 210 struct device *dev = &adapter->vdev->dev; 211 212 if (!ltb->buff) 213 return; 214 215 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 216 adapter->reset_reason != VNIC_RESET_MOBILITY) 217 send_request_unmap(adapter, ltb->map_id); 218 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 219 } 220 221 static int reset_long_term_buff(struct ibmvnic_adapter *adapter, 222 struct ibmvnic_long_term_buff *ltb) 223 { 224 int rc; 225 226 memset(ltb->buff, 0, ltb->size); 227 228 init_completion(&adapter->fw_done); 229 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 230 if (rc) 231 return rc; 232 wait_for_completion(&adapter->fw_done); 233 234 if (adapter->fw_done_rc) { 235 dev_info(&adapter->vdev->dev, 236 "Reset failed, attempting to free and reallocate buffer\n"); 237 free_long_term_buff(adapter, ltb); 238 return alloc_long_term_buff(adapter, ltb, ltb->size); 239 } 240 return 0; 241 } 242 243 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 244 { 245 int i; 246 247 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 248 i++) 249 adapter->rx_pool[i].active = 0; 250 } 251 252 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 253 struct ibmvnic_rx_pool *pool) 254 { 255 int count = pool->size - atomic_read(&pool->available); 256 struct device *dev = &adapter->vdev->dev; 257 int buffers_added = 0; 258 unsigned long lpar_rc; 259 union sub_crq sub_crq; 260 struct sk_buff *skb; 261 unsigned int offset; 262 dma_addr_t dma_addr; 263 unsigned char *dst; 264 u64 *handle_array; 265 int shift = 0; 266 int index; 267 int i; 268 269 if (!pool->active) 270 return; 271 272 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 273 be32_to_cpu(adapter->login_rsp_buf-> 274 off_rxadd_subcrqs)); 275 276 for (i = 0; i < count; ++i) { 277 skb = alloc_skb(pool->buff_size, GFP_ATOMIC); 278 if (!skb) { 279 dev_err(dev, "Couldn't replenish rx buff\n"); 280 adapter->replenish_no_mem++; 281 break; 282 } 283 284 index = pool->free_map[pool->next_free]; 285 286 if (pool->rx_buff[index].skb) 287 dev_err(dev, "Inconsistent free_map!\n"); 288 289 /* Copy the skb to the long term mapped DMA buffer */ 290 offset = index * pool->buff_size; 291 dst = pool->long_term_buff.buff + offset; 292 memset(dst, 0, pool->buff_size); 293 dma_addr = pool->long_term_buff.addr + offset; 294 pool->rx_buff[index].data = dst; 295 296 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 297 pool->rx_buff[index].dma = dma_addr; 298 pool->rx_buff[index].skb = skb; 299 pool->rx_buff[index].pool_index = pool->index; 300 pool->rx_buff[index].size = pool->buff_size; 301 302 memset(&sub_crq, 0, sizeof(sub_crq)); 303 sub_crq.rx_add.first = IBMVNIC_CRQ_CMD; 304 sub_crq.rx_add.correlator = 305 cpu_to_be64((u64)&pool->rx_buff[index]); 306 sub_crq.rx_add.ioba = cpu_to_be32(dma_addr); 307 sub_crq.rx_add.map_id = pool->long_term_buff.map_id; 308 309 /* The length field of the sCRQ is defined to be 24 bits so the 310 * buffer size needs to be left shifted by a byte before it is 311 * converted to big endian to prevent the last byte from being 312 * truncated. 313 */ 314 #ifdef __LITTLE_ENDIAN__ 315 shift = 8; 316 #endif 317 sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift); 318 319 lpar_rc = send_subcrq(adapter, handle_array[pool->index], 320 &sub_crq); 321 if (lpar_rc != H_SUCCESS) 322 goto failure; 323 324 buffers_added++; 325 adapter->replenish_add_buff_success++; 326 pool->next_free = (pool->next_free + 1) % pool->size; 327 } 328 atomic_add(buffers_added, &pool->available); 329 return; 330 331 failure: 332 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 333 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 334 pool->free_map[pool->next_free] = index; 335 pool->rx_buff[index].skb = NULL; 336 337 dev_kfree_skb_any(skb); 338 adapter->replenish_add_buff_failure++; 339 atomic_add(buffers_added, &pool->available); 340 341 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 342 /* Disable buffer pool replenishment and report carrier off if 343 * queue is closed or pending failover. 344 * Firmware guarantees that a signal will be sent to the 345 * driver, triggering a reset. 346 */ 347 deactivate_rx_pools(adapter); 348 netif_carrier_off(adapter->netdev); 349 } 350 } 351 352 static void replenish_pools(struct ibmvnic_adapter *adapter) 353 { 354 int i; 355 356 adapter->replenish_task_cycles++; 357 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 358 i++) { 359 if (adapter->rx_pool[i].active) 360 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 361 } 362 } 363 364 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 365 { 366 kfree(adapter->tx_stats_buffers); 367 kfree(adapter->rx_stats_buffers); 368 adapter->tx_stats_buffers = NULL; 369 adapter->rx_stats_buffers = NULL; 370 } 371 372 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 373 { 374 adapter->tx_stats_buffers = 375 kcalloc(IBMVNIC_MAX_QUEUES, 376 sizeof(struct ibmvnic_tx_queue_stats), 377 GFP_KERNEL); 378 if (!adapter->tx_stats_buffers) 379 return -ENOMEM; 380 381 adapter->rx_stats_buffers = 382 kcalloc(IBMVNIC_MAX_QUEUES, 383 sizeof(struct ibmvnic_rx_queue_stats), 384 GFP_KERNEL); 385 if (!adapter->rx_stats_buffers) 386 return -ENOMEM; 387 388 return 0; 389 } 390 391 static void release_stats_token(struct ibmvnic_adapter *adapter) 392 { 393 struct device *dev = &adapter->vdev->dev; 394 395 if (!adapter->stats_token) 396 return; 397 398 dma_unmap_single(dev, adapter->stats_token, 399 sizeof(struct ibmvnic_statistics), 400 DMA_FROM_DEVICE); 401 adapter->stats_token = 0; 402 } 403 404 static int init_stats_token(struct ibmvnic_adapter *adapter) 405 { 406 struct device *dev = &adapter->vdev->dev; 407 dma_addr_t stok; 408 409 stok = dma_map_single(dev, &adapter->stats, 410 sizeof(struct ibmvnic_statistics), 411 DMA_FROM_DEVICE); 412 if (dma_mapping_error(dev, stok)) { 413 dev_err(dev, "Couldn't map stats buffer\n"); 414 return -1; 415 } 416 417 adapter->stats_token = stok; 418 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 419 return 0; 420 } 421 422 static int reset_rx_pools(struct ibmvnic_adapter *adapter) 423 { 424 struct ibmvnic_rx_pool *rx_pool; 425 int rx_scrqs; 426 int i, j, rc; 427 u64 *size_array; 428 429 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 430 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 431 432 rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 433 for (i = 0; i < rx_scrqs; i++) { 434 rx_pool = &adapter->rx_pool[i]; 435 436 netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i); 437 438 if (rx_pool->buff_size != be64_to_cpu(size_array[i])) { 439 free_long_term_buff(adapter, &rx_pool->long_term_buff); 440 rx_pool->buff_size = be64_to_cpu(size_array[i]); 441 alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 442 rx_pool->size * 443 rx_pool->buff_size); 444 } else { 445 rc = reset_long_term_buff(adapter, 446 &rx_pool->long_term_buff); 447 } 448 449 if (rc) 450 return rc; 451 452 for (j = 0; j < rx_pool->size; j++) 453 rx_pool->free_map[j] = j; 454 455 memset(rx_pool->rx_buff, 0, 456 rx_pool->size * sizeof(struct ibmvnic_rx_buff)); 457 458 atomic_set(&rx_pool->available, 0); 459 rx_pool->next_alloc = 0; 460 rx_pool->next_free = 0; 461 rx_pool->active = 1; 462 } 463 464 return 0; 465 } 466 467 static void release_rx_pools(struct ibmvnic_adapter *adapter) 468 { 469 struct ibmvnic_rx_pool *rx_pool; 470 int i, j; 471 472 if (!adapter->rx_pool) 473 return; 474 475 for (i = 0; i < adapter->num_active_rx_pools; i++) { 476 rx_pool = &adapter->rx_pool[i]; 477 478 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 479 480 kfree(rx_pool->free_map); 481 free_long_term_buff(adapter, &rx_pool->long_term_buff); 482 483 if (!rx_pool->rx_buff) 484 continue; 485 486 for (j = 0; j < rx_pool->size; j++) { 487 if (rx_pool->rx_buff[j].skb) { 488 dev_kfree_skb_any(rx_pool->rx_buff[i].skb); 489 rx_pool->rx_buff[i].skb = NULL; 490 } 491 } 492 493 kfree(rx_pool->rx_buff); 494 } 495 496 kfree(adapter->rx_pool); 497 adapter->rx_pool = NULL; 498 adapter->num_active_rx_pools = 0; 499 } 500 501 static int init_rx_pools(struct net_device *netdev) 502 { 503 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 504 struct device *dev = &adapter->vdev->dev; 505 struct ibmvnic_rx_pool *rx_pool; 506 int rxadd_subcrqs; 507 u64 *size_array; 508 int i, j; 509 510 rxadd_subcrqs = 511 be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 512 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 513 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 514 515 adapter->rx_pool = kcalloc(rxadd_subcrqs, 516 sizeof(struct ibmvnic_rx_pool), 517 GFP_KERNEL); 518 if (!adapter->rx_pool) { 519 dev_err(dev, "Failed to allocate rx pools\n"); 520 return -1; 521 } 522 523 adapter->num_active_rx_pools = rxadd_subcrqs; 524 525 for (i = 0; i < rxadd_subcrqs; i++) { 526 rx_pool = &adapter->rx_pool[i]; 527 528 netdev_dbg(adapter->netdev, 529 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 530 i, adapter->req_rx_add_entries_per_subcrq, 531 be64_to_cpu(size_array[i])); 532 533 rx_pool->size = adapter->req_rx_add_entries_per_subcrq; 534 rx_pool->index = i; 535 rx_pool->buff_size = be64_to_cpu(size_array[i]); 536 rx_pool->active = 1; 537 538 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 539 GFP_KERNEL); 540 if (!rx_pool->free_map) { 541 release_rx_pools(adapter); 542 return -1; 543 } 544 545 rx_pool->rx_buff = kcalloc(rx_pool->size, 546 sizeof(struct ibmvnic_rx_buff), 547 GFP_KERNEL); 548 if (!rx_pool->rx_buff) { 549 dev_err(dev, "Couldn't alloc rx buffers\n"); 550 release_rx_pools(adapter); 551 return -1; 552 } 553 554 if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff, 555 rx_pool->size * rx_pool->buff_size)) { 556 release_rx_pools(adapter); 557 return -1; 558 } 559 560 for (j = 0; j < rx_pool->size; ++j) 561 rx_pool->free_map[j] = j; 562 563 atomic_set(&rx_pool->available, 0); 564 rx_pool->next_alloc = 0; 565 rx_pool->next_free = 0; 566 } 567 568 return 0; 569 } 570 571 static int reset_one_tx_pool(struct ibmvnic_adapter *adapter, 572 struct ibmvnic_tx_pool *tx_pool) 573 { 574 int rc, i; 575 576 rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff); 577 if (rc) 578 return rc; 579 580 memset(tx_pool->tx_buff, 0, 581 tx_pool->num_buffers * 582 sizeof(struct ibmvnic_tx_buff)); 583 584 for (i = 0; i < tx_pool->num_buffers; i++) 585 tx_pool->free_map[i] = i; 586 587 tx_pool->consumer_index = 0; 588 tx_pool->producer_index = 0; 589 590 return 0; 591 } 592 593 static int reset_tx_pools(struct ibmvnic_adapter *adapter) 594 { 595 int tx_scrqs; 596 int i, rc; 597 598 tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 599 for (i = 0; i < tx_scrqs; i++) { 600 rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]); 601 if (rc) 602 return rc; 603 rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]); 604 if (rc) 605 return rc; 606 } 607 608 return 0; 609 } 610 611 static void release_vpd_data(struct ibmvnic_adapter *adapter) 612 { 613 if (!adapter->vpd) 614 return; 615 616 kfree(adapter->vpd->buff); 617 kfree(adapter->vpd); 618 619 adapter->vpd = NULL; 620 } 621 622 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 623 struct ibmvnic_tx_pool *tx_pool) 624 { 625 kfree(tx_pool->tx_buff); 626 kfree(tx_pool->free_map); 627 free_long_term_buff(adapter, &tx_pool->long_term_buff); 628 } 629 630 static void release_tx_pools(struct ibmvnic_adapter *adapter) 631 { 632 int i; 633 634 if (!adapter->tx_pool) 635 return; 636 637 for (i = 0; i < adapter->num_active_tx_pools; i++) { 638 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 639 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 640 } 641 642 kfree(adapter->tx_pool); 643 adapter->tx_pool = NULL; 644 kfree(adapter->tso_pool); 645 adapter->tso_pool = NULL; 646 adapter->num_active_tx_pools = 0; 647 } 648 649 static int init_one_tx_pool(struct net_device *netdev, 650 struct ibmvnic_tx_pool *tx_pool, 651 int num_entries, int buf_size) 652 { 653 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 654 int i; 655 656 tx_pool->tx_buff = kcalloc(num_entries, 657 sizeof(struct ibmvnic_tx_buff), 658 GFP_KERNEL); 659 if (!tx_pool->tx_buff) 660 return -1; 661 662 if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff, 663 num_entries * buf_size)) 664 return -1; 665 666 tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL); 667 if (!tx_pool->free_map) 668 return -1; 669 670 for (i = 0; i < num_entries; i++) 671 tx_pool->free_map[i] = i; 672 673 tx_pool->consumer_index = 0; 674 tx_pool->producer_index = 0; 675 tx_pool->num_buffers = num_entries; 676 tx_pool->buf_size = buf_size; 677 678 return 0; 679 } 680 681 static int init_tx_pools(struct net_device *netdev) 682 { 683 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 684 int tx_subcrqs; 685 int i, rc; 686 687 tx_subcrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 688 adapter->tx_pool = kcalloc(tx_subcrqs, 689 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 690 if (!adapter->tx_pool) 691 return -1; 692 693 adapter->tso_pool = kcalloc(tx_subcrqs, 694 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 695 if (!adapter->tso_pool) 696 return -1; 697 698 adapter->num_active_tx_pools = tx_subcrqs; 699 700 for (i = 0; i < tx_subcrqs; i++) { 701 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 702 adapter->req_tx_entries_per_subcrq, 703 adapter->req_mtu + VLAN_HLEN); 704 if (rc) { 705 release_tx_pools(adapter); 706 return rc; 707 } 708 709 init_one_tx_pool(netdev, &adapter->tso_pool[i], 710 IBMVNIC_TSO_BUFS, 711 IBMVNIC_TSO_BUF_SZ); 712 if (rc) { 713 release_tx_pools(adapter); 714 return rc; 715 } 716 } 717 718 return 0; 719 } 720 721 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 722 { 723 int i; 724 725 if (adapter->napi_enabled) 726 return; 727 728 for (i = 0; i < adapter->req_rx_queues; i++) 729 napi_enable(&adapter->napi[i]); 730 731 adapter->napi_enabled = true; 732 } 733 734 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 735 { 736 int i; 737 738 if (!adapter->napi_enabled) 739 return; 740 741 for (i = 0; i < adapter->req_rx_queues; i++) { 742 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 743 napi_disable(&adapter->napi[i]); 744 } 745 746 adapter->napi_enabled = false; 747 } 748 749 static int init_napi(struct ibmvnic_adapter *adapter) 750 { 751 int i; 752 753 adapter->napi = kcalloc(adapter->req_rx_queues, 754 sizeof(struct napi_struct), GFP_KERNEL); 755 if (!adapter->napi) 756 return -ENOMEM; 757 758 for (i = 0; i < adapter->req_rx_queues; i++) { 759 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 760 netif_napi_add(adapter->netdev, &adapter->napi[i], 761 ibmvnic_poll, NAPI_POLL_WEIGHT); 762 } 763 764 adapter->num_active_rx_napi = adapter->req_rx_queues; 765 return 0; 766 } 767 768 static void release_napi(struct ibmvnic_adapter *adapter) 769 { 770 int i; 771 772 if (!adapter->napi) 773 return; 774 775 for (i = 0; i < adapter->num_active_rx_napi; i++) { 776 if (&adapter->napi[i]) { 777 netdev_dbg(adapter->netdev, 778 "Releasing napi[%d]\n", i); 779 netif_napi_del(&adapter->napi[i]); 780 } 781 } 782 783 kfree(adapter->napi); 784 adapter->napi = NULL; 785 adapter->num_active_rx_napi = 0; 786 adapter->napi_enabled = false; 787 } 788 789 static int ibmvnic_login(struct net_device *netdev) 790 { 791 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 792 unsigned long timeout = msecs_to_jiffies(30000); 793 int retry_count = 0; 794 bool retry; 795 int rc; 796 797 do { 798 retry = false; 799 if (retry_count > IBMVNIC_MAX_QUEUES) { 800 netdev_warn(netdev, "Login attempts exceeded\n"); 801 return -1; 802 } 803 804 adapter->init_done_rc = 0; 805 reinit_completion(&adapter->init_done); 806 rc = send_login(adapter); 807 if (rc) { 808 netdev_warn(netdev, "Unable to login\n"); 809 return rc; 810 } 811 812 if (!wait_for_completion_timeout(&adapter->init_done, 813 timeout)) { 814 netdev_warn(netdev, "Login timed out\n"); 815 return -1; 816 } 817 818 if (adapter->init_done_rc == PARTIALSUCCESS) { 819 retry_count++; 820 release_sub_crqs(adapter, 1); 821 822 retry = true; 823 netdev_dbg(netdev, 824 "Received partial success, retrying...\n"); 825 adapter->init_done_rc = 0; 826 reinit_completion(&adapter->init_done); 827 send_cap_queries(adapter); 828 if (!wait_for_completion_timeout(&adapter->init_done, 829 timeout)) { 830 netdev_warn(netdev, 831 "Capabilities query timed out\n"); 832 return -1; 833 } 834 835 rc = init_sub_crqs(adapter); 836 if (rc) { 837 netdev_warn(netdev, 838 "SCRQ initialization failed\n"); 839 return -1; 840 } 841 842 rc = init_sub_crq_irqs(adapter); 843 if (rc) { 844 netdev_warn(netdev, 845 "SCRQ irq initialization failed\n"); 846 return -1; 847 } 848 } else if (adapter->init_done_rc) { 849 netdev_warn(netdev, "Adapter login failed\n"); 850 return -1; 851 } 852 } while (retry); 853 854 /* handle pending MAC address changes after successful login */ 855 if (adapter->mac_change_pending) { 856 __ibmvnic_set_mac(netdev, &adapter->desired.mac); 857 adapter->mac_change_pending = false; 858 } 859 860 return 0; 861 } 862 863 static void release_login_buffer(struct ibmvnic_adapter *adapter) 864 { 865 kfree(adapter->login_buf); 866 adapter->login_buf = NULL; 867 } 868 869 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 870 { 871 kfree(adapter->login_rsp_buf); 872 adapter->login_rsp_buf = NULL; 873 } 874 875 static void release_resources(struct ibmvnic_adapter *adapter) 876 { 877 release_vpd_data(adapter); 878 879 release_tx_pools(adapter); 880 release_rx_pools(adapter); 881 882 release_napi(adapter); 883 release_login_rsp_buffer(adapter); 884 } 885 886 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 887 { 888 struct net_device *netdev = adapter->netdev; 889 unsigned long timeout = msecs_to_jiffies(30000); 890 union ibmvnic_crq crq; 891 bool resend; 892 int rc; 893 894 netdev_dbg(netdev, "setting link state %d\n", link_state); 895 896 memset(&crq, 0, sizeof(crq)); 897 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 898 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 899 crq.logical_link_state.link_state = link_state; 900 901 do { 902 resend = false; 903 904 reinit_completion(&adapter->init_done); 905 rc = ibmvnic_send_crq(adapter, &crq); 906 if (rc) { 907 netdev_err(netdev, "Failed to set link state\n"); 908 return rc; 909 } 910 911 if (!wait_for_completion_timeout(&adapter->init_done, 912 timeout)) { 913 netdev_err(netdev, "timeout setting link state\n"); 914 return -1; 915 } 916 917 if (adapter->init_done_rc == 1) { 918 /* Partuial success, delay and re-send */ 919 mdelay(1000); 920 resend = true; 921 } else if (adapter->init_done_rc) { 922 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 923 adapter->init_done_rc); 924 return adapter->init_done_rc; 925 } 926 } while (resend); 927 928 return 0; 929 } 930 931 static int set_real_num_queues(struct net_device *netdev) 932 { 933 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 934 int rc; 935 936 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 937 adapter->req_tx_queues, adapter->req_rx_queues); 938 939 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 940 if (rc) { 941 netdev_err(netdev, "failed to set the number of tx queues\n"); 942 return rc; 943 } 944 945 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 946 if (rc) 947 netdev_err(netdev, "failed to set the number of rx queues\n"); 948 949 return rc; 950 } 951 952 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 953 { 954 struct device *dev = &adapter->vdev->dev; 955 union ibmvnic_crq crq; 956 int len = 0; 957 int rc; 958 959 if (adapter->vpd->buff) 960 len = adapter->vpd->len; 961 962 init_completion(&adapter->fw_done); 963 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 964 crq.get_vpd_size.cmd = GET_VPD_SIZE; 965 rc = ibmvnic_send_crq(adapter, &crq); 966 if (rc) 967 return rc; 968 wait_for_completion(&adapter->fw_done); 969 970 if (!adapter->vpd->len) 971 return -ENODATA; 972 973 if (!adapter->vpd->buff) 974 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 975 else if (adapter->vpd->len != len) 976 adapter->vpd->buff = 977 krealloc(adapter->vpd->buff, 978 adapter->vpd->len, GFP_KERNEL); 979 980 if (!adapter->vpd->buff) { 981 dev_err(dev, "Could allocate VPD buffer\n"); 982 return -ENOMEM; 983 } 984 985 adapter->vpd->dma_addr = 986 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 987 DMA_FROM_DEVICE); 988 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 989 dev_err(dev, "Could not map VPD buffer\n"); 990 kfree(adapter->vpd->buff); 991 adapter->vpd->buff = NULL; 992 return -ENOMEM; 993 } 994 995 reinit_completion(&adapter->fw_done); 996 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 997 crq.get_vpd.cmd = GET_VPD; 998 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 999 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1000 rc = ibmvnic_send_crq(adapter, &crq); 1001 if (rc) { 1002 kfree(adapter->vpd->buff); 1003 adapter->vpd->buff = NULL; 1004 return rc; 1005 } 1006 wait_for_completion(&adapter->fw_done); 1007 1008 return 0; 1009 } 1010 1011 static int init_resources(struct ibmvnic_adapter *adapter) 1012 { 1013 struct net_device *netdev = adapter->netdev; 1014 int rc; 1015 1016 rc = set_real_num_queues(netdev); 1017 if (rc) 1018 return rc; 1019 1020 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1021 if (!adapter->vpd) 1022 return -ENOMEM; 1023 1024 /* Vital Product Data (VPD) */ 1025 rc = ibmvnic_get_vpd(adapter); 1026 if (rc) { 1027 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1028 return rc; 1029 } 1030 1031 adapter->map_id = 1; 1032 1033 rc = init_napi(adapter); 1034 if (rc) 1035 return rc; 1036 1037 send_map_query(adapter); 1038 1039 rc = init_rx_pools(netdev); 1040 if (rc) 1041 return rc; 1042 1043 rc = init_tx_pools(netdev); 1044 return rc; 1045 } 1046 1047 static int __ibmvnic_open(struct net_device *netdev) 1048 { 1049 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1050 enum vnic_state prev_state = adapter->state; 1051 int i, rc; 1052 1053 adapter->state = VNIC_OPENING; 1054 replenish_pools(adapter); 1055 ibmvnic_napi_enable(adapter); 1056 1057 /* We're ready to receive frames, enable the sub-crq interrupts and 1058 * set the logical link state to up 1059 */ 1060 for (i = 0; i < adapter->req_rx_queues; i++) { 1061 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1062 if (prev_state == VNIC_CLOSED) 1063 enable_irq(adapter->rx_scrq[i]->irq); 1064 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1065 } 1066 1067 for (i = 0; i < adapter->req_tx_queues; i++) { 1068 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1069 if (prev_state == VNIC_CLOSED) 1070 enable_irq(adapter->tx_scrq[i]->irq); 1071 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1072 } 1073 1074 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1075 if (rc) { 1076 for (i = 0; i < adapter->req_rx_queues; i++) 1077 napi_disable(&adapter->napi[i]); 1078 release_resources(adapter); 1079 return rc; 1080 } 1081 1082 netif_tx_start_all_queues(netdev); 1083 1084 if (prev_state == VNIC_CLOSED) { 1085 for (i = 0; i < adapter->req_rx_queues; i++) 1086 napi_schedule(&adapter->napi[i]); 1087 } 1088 1089 adapter->state = VNIC_OPEN; 1090 return rc; 1091 } 1092 1093 static int ibmvnic_open(struct net_device *netdev) 1094 { 1095 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1096 int rc; 1097 1098 /* If device failover is pending, just set device state and return. 1099 * Device operation will be handled by reset routine. 1100 */ 1101 if (adapter->failover_pending) { 1102 adapter->state = VNIC_OPEN; 1103 return 0; 1104 } 1105 1106 mutex_lock(&adapter->reset_lock); 1107 1108 if (adapter->state != VNIC_CLOSED) { 1109 rc = ibmvnic_login(netdev); 1110 if (rc) { 1111 mutex_unlock(&adapter->reset_lock); 1112 return rc; 1113 } 1114 1115 rc = init_resources(adapter); 1116 if (rc) { 1117 netdev_err(netdev, "failed to initialize resources\n"); 1118 release_resources(adapter); 1119 mutex_unlock(&adapter->reset_lock); 1120 return rc; 1121 } 1122 } 1123 1124 rc = __ibmvnic_open(netdev); 1125 netif_carrier_on(netdev); 1126 1127 mutex_unlock(&adapter->reset_lock); 1128 1129 return rc; 1130 } 1131 1132 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1133 { 1134 struct ibmvnic_rx_pool *rx_pool; 1135 struct ibmvnic_rx_buff *rx_buff; 1136 u64 rx_entries; 1137 int rx_scrqs; 1138 int i, j; 1139 1140 if (!adapter->rx_pool) 1141 return; 1142 1143 rx_scrqs = adapter->num_active_rx_pools; 1144 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1145 1146 /* Free any remaining skbs in the rx buffer pools */ 1147 for (i = 0; i < rx_scrqs; i++) { 1148 rx_pool = &adapter->rx_pool[i]; 1149 if (!rx_pool || !rx_pool->rx_buff) 1150 continue; 1151 1152 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1153 for (j = 0; j < rx_entries; j++) { 1154 rx_buff = &rx_pool->rx_buff[j]; 1155 if (rx_buff && rx_buff->skb) { 1156 dev_kfree_skb_any(rx_buff->skb); 1157 rx_buff->skb = NULL; 1158 } 1159 } 1160 } 1161 } 1162 1163 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1164 struct ibmvnic_tx_pool *tx_pool) 1165 { 1166 struct ibmvnic_tx_buff *tx_buff; 1167 u64 tx_entries; 1168 int i; 1169 1170 if (!tx_pool || !tx_pool->tx_buff) 1171 return; 1172 1173 tx_entries = tx_pool->num_buffers; 1174 1175 for (i = 0; i < tx_entries; i++) { 1176 tx_buff = &tx_pool->tx_buff[i]; 1177 if (tx_buff && tx_buff->skb) { 1178 dev_kfree_skb_any(tx_buff->skb); 1179 tx_buff->skb = NULL; 1180 } 1181 } 1182 } 1183 1184 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1185 { 1186 int tx_scrqs; 1187 int i; 1188 1189 if (!adapter->tx_pool || !adapter->tso_pool) 1190 return; 1191 1192 tx_scrqs = adapter->num_active_tx_pools; 1193 1194 /* Free any remaining skbs in the tx buffer pools */ 1195 for (i = 0; i < tx_scrqs; i++) { 1196 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1197 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1198 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1199 } 1200 } 1201 1202 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1203 { 1204 struct net_device *netdev = adapter->netdev; 1205 int i; 1206 1207 if (adapter->tx_scrq) { 1208 for (i = 0; i < adapter->req_tx_queues; i++) 1209 if (adapter->tx_scrq[i]->irq) { 1210 netdev_dbg(netdev, 1211 "Disabling tx_scrq[%d] irq\n", i); 1212 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1213 disable_irq(adapter->tx_scrq[i]->irq); 1214 } 1215 } 1216 1217 if (adapter->rx_scrq) { 1218 for (i = 0; i < adapter->req_rx_queues; i++) { 1219 if (adapter->rx_scrq[i]->irq) { 1220 netdev_dbg(netdev, 1221 "Disabling rx_scrq[%d] irq\n", i); 1222 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1223 disable_irq(adapter->rx_scrq[i]->irq); 1224 } 1225 } 1226 } 1227 } 1228 1229 static void ibmvnic_cleanup(struct net_device *netdev) 1230 { 1231 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1232 1233 /* ensure that transmissions are stopped if called by do_reset */ 1234 if (adapter->resetting) 1235 netif_tx_disable(netdev); 1236 else 1237 netif_tx_stop_all_queues(netdev); 1238 1239 ibmvnic_napi_disable(adapter); 1240 ibmvnic_disable_irqs(adapter); 1241 1242 clean_rx_pools(adapter); 1243 clean_tx_pools(adapter); 1244 } 1245 1246 static int __ibmvnic_close(struct net_device *netdev) 1247 { 1248 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1249 int rc = 0; 1250 1251 adapter->state = VNIC_CLOSING; 1252 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1253 if (rc) 1254 return rc; 1255 adapter->state = VNIC_CLOSED; 1256 return 0; 1257 } 1258 1259 static int ibmvnic_close(struct net_device *netdev) 1260 { 1261 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1262 int rc; 1263 1264 /* If device failover is pending, just set device state and return. 1265 * Device operation will be handled by reset routine. 1266 */ 1267 if (adapter->failover_pending) { 1268 adapter->state = VNIC_CLOSED; 1269 return 0; 1270 } 1271 1272 mutex_lock(&adapter->reset_lock); 1273 rc = __ibmvnic_close(netdev); 1274 ibmvnic_cleanup(netdev); 1275 mutex_unlock(&adapter->reset_lock); 1276 1277 return rc; 1278 } 1279 1280 /** 1281 * build_hdr_data - creates L2/L3/L4 header data buffer 1282 * @hdr_field - bitfield determining needed headers 1283 * @skb - socket buffer 1284 * @hdr_len - array of header lengths 1285 * @tot_len - total length of data 1286 * 1287 * Reads hdr_field to determine which headers are needed by firmware. 1288 * Builds a buffer containing these headers. Saves individual header 1289 * lengths and total buffer length to be used to build descriptors. 1290 */ 1291 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1292 int *hdr_len, u8 *hdr_data) 1293 { 1294 int len = 0; 1295 u8 *hdr; 1296 1297 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1298 hdr_len[0] = sizeof(struct vlan_ethhdr); 1299 else 1300 hdr_len[0] = sizeof(struct ethhdr); 1301 1302 if (skb->protocol == htons(ETH_P_IP)) { 1303 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1304 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1305 hdr_len[2] = tcp_hdrlen(skb); 1306 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1307 hdr_len[2] = sizeof(struct udphdr); 1308 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1309 hdr_len[1] = sizeof(struct ipv6hdr); 1310 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1311 hdr_len[2] = tcp_hdrlen(skb); 1312 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1313 hdr_len[2] = sizeof(struct udphdr); 1314 } else if (skb->protocol == htons(ETH_P_ARP)) { 1315 hdr_len[1] = arp_hdr_len(skb->dev); 1316 hdr_len[2] = 0; 1317 } 1318 1319 memset(hdr_data, 0, 120); 1320 if ((hdr_field >> 6) & 1) { 1321 hdr = skb_mac_header(skb); 1322 memcpy(hdr_data, hdr, hdr_len[0]); 1323 len += hdr_len[0]; 1324 } 1325 1326 if ((hdr_field >> 5) & 1) { 1327 hdr = skb_network_header(skb); 1328 memcpy(hdr_data + len, hdr, hdr_len[1]); 1329 len += hdr_len[1]; 1330 } 1331 1332 if ((hdr_field >> 4) & 1) { 1333 hdr = skb_transport_header(skb); 1334 memcpy(hdr_data + len, hdr, hdr_len[2]); 1335 len += hdr_len[2]; 1336 } 1337 return len; 1338 } 1339 1340 /** 1341 * create_hdr_descs - create header and header extension descriptors 1342 * @hdr_field - bitfield determining needed headers 1343 * @data - buffer containing header data 1344 * @len - length of data buffer 1345 * @hdr_len - array of individual header lengths 1346 * @scrq_arr - descriptor array 1347 * 1348 * Creates header and, if needed, header extension descriptors and 1349 * places them in a descriptor array, scrq_arr 1350 */ 1351 1352 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1353 union sub_crq *scrq_arr) 1354 { 1355 union sub_crq hdr_desc; 1356 int tmp_len = len; 1357 int num_descs = 0; 1358 u8 *data, *cur; 1359 int tmp; 1360 1361 while (tmp_len > 0) { 1362 cur = hdr_data + len - tmp_len; 1363 1364 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1365 if (cur != hdr_data) { 1366 data = hdr_desc.hdr_ext.data; 1367 tmp = tmp_len > 29 ? 29 : tmp_len; 1368 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1369 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1370 hdr_desc.hdr_ext.len = tmp; 1371 } else { 1372 data = hdr_desc.hdr.data; 1373 tmp = tmp_len > 24 ? 24 : tmp_len; 1374 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1375 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1376 hdr_desc.hdr.len = tmp; 1377 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1378 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1379 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1380 hdr_desc.hdr.flag = hdr_field << 1; 1381 } 1382 memcpy(data, cur, tmp); 1383 tmp_len -= tmp; 1384 *scrq_arr = hdr_desc; 1385 scrq_arr++; 1386 num_descs++; 1387 } 1388 1389 return num_descs; 1390 } 1391 1392 /** 1393 * build_hdr_descs_arr - build a header descriptor array 1394 * @skb - socket buffer 1395 * @num_entries - number of descriptors to be sent 1396 * @subcrq - first TX descriptor 1397 * @hdr_field - bit field determining which headers will be sent 1398 * 1399 * This function will build a TX descriptor array with applicable 1400 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1401 */ 1402 1403 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1404 int *num_entries, u8 hdr_field) 1405 { 1406 int hdr_len[3] = {0, 0, 0}; 1407 int tot_len; 1408 u8 *hdr_data = txbuff->hdr_data; 1409 1410 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1411 txbuff->hdr_data); 1412 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1413 txbuff->indir_arr + 1); 1414 } 1415 1416 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1417 struct net_device *netdev) 1418 { 1419 /* For some backing devices, mishandling of small packets 1420 * can result in a loss of connection or TX stall. Device 1421 * architects recommend that no packet should be smaller 1422 * than the minimum MTU value provided to the driver, so 1423 * pad any packets to that length 1424 */ 1425 if (skb->len < netdev->min_mtu) 1426 return skb_put_padto(skb, netdev->min_mtu); 1427 1428 return 0; 1429 } 1430 1431 static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1432 { 1433 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1434 int queue_num = skb_get_queue_mapping(skb); 1435 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1436 struct device *dev = &adapter->vdev->dev; 1437 struct ibmvnic_tx_buff *tx_buff = NULL; 1438 struct ibmvnic_sub_crq_queue *tx_scrq; 1439 struct ibmvnic_tx_pool *tx_pool; 1440 unsigned int tx_send_failed = 0; 1441 unsigned int tx_map_failed = 0; 1442 unsigned int tx_dropped = 0; 1443 unsigned int tx_packets = 0; 1444 unsigned int tx_bytes = 0; 1445 dma_addr_t data_dma_addr; 1446 struct netdev_queue *txq; 1447 unsigned long lpar_rc; 1448 union sub_crq tx_crq; 1449 unsigned int offset; 1450 int num_entries = 1; 1451 unsigned char *dst; 1452 u64 *handle_array; 1453 int index = 0; 1454 u8 proto = 0; 1455 int ret = 0; 1456 1457 if (adapter->resetting) { 1458 if (!netif_subqueue_stopped(netdev, skb)) 1459 netif_stop_subqueue(netdev, queue_num); 1460 dev_kfree_skb_any(skb); 1461 1462 tx_send_failed++; 1463 tx_dropped++; 1464 ret = NETDEV_TX_OK; 1465 goto out; 1466 } 1467 1468 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1469 tx_dropped++; 1470 tx_send_failed++; 1471 ret = NETDEV_TX_OK; 1472 goto out; 1473 } 1474 if (skb_is_gso(skb)) 1475 tx_pool = &adapter->tso_pool[queue_num]; 1476 else 1477 tx_pool = &adapter->tx_pool[queue_num]; 1478 1479 tx_scrq = adapter->tx_scrq[queue_num]; 1480 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1481 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1482 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1483 1484 index = tx_pool->free_map[tx_pool->consumer_index]; 1485 1486 if (index == IBMVNIC_INVALID_MAP) { 1487 dev_kfree_skb_any(skb); 1488 tx_send_failed++; 1489 tx_dropped++; 1490 ret = NETDEV_TX_OK; 1491 goto out; 1492 } 1493 1494 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1495 1496 offset = index * tx_pool->buf_size; 1497 dst = tx_pool->long_term_buff.buff + offset; 1498 memset(dst, 0, tx_pool->buf_size); 1499 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1500 1501 if (skb_shinfo(skb)->nr_frags) { 1502 int cur, i; 1503 1504 /* Copy the head */ 1505 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1506 cur = skb_headlen(skb); 1507 1508 /* Copy the frags */ 1509 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1510 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1511 1512 memcpy(dst + cur, 1513 page_address(skb_frag_page(frag)) + 1514 frag->page_offset, skb_frag_size(frag)); 1515 cur += skb_frag_size(frag); 1516 } 1517 } else { 1518 skb_copy_from_linear_data(skb, dst, skb->len); 1519 } 1520 1521 tx_pool->consumer_index = 1522 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1523 1524 tx_buff = &tx_pool->tx_buff[index]; 1525 tx_buff->skb = skb; 1526 tx_buff->data_dma[0] = data_dma_addr; 1527 tx_buff->data_len[0] = skb->len; 1528 tx_buff->index = index; 1529 tx_buff->pool_index = queue_num; 1530 tx_buff->last_frag = true; 1531 1532 memset(&tx_crq, 0, sizeof(tx_crq)); 1533 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1534 tx_crq.v1.type = IBMVNIC_TX_DESC; 1535 tx_crq.v1.n_crq_elem = 1; 1536 tx_crq.v1.n_sge = 1; 1537 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1538 1539 if (skb_is_gso(skb)) 1540 tx_crq.v1.correlator = 1541 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1542 else 1543 tx_crq.v1.correlator = cpu_to_be32(index); 1544 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1545 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1546 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1547 1548 if (adapter->vlan_header_insertion) { 1549 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1550 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1551 } 1552 1553 if (skb->protocol == htons(ETH_P_IP)) { 1554 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1555 proto = ip_hdr(skb)->protocol; 1556 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1557 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1558 proto = ipv6_hdr(skb)->nexthdr; 1559 } 1560 1561 if (proto == IPPROTO_TCP) 1562 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1563 else if (proto == IPPROTO_UDP) 1564 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1565 1566 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1567 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1568 hdrs += 2; 1569 } 1570 if (skb_is_gso(skb)) { 1571 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1572 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1573 hdrs += 2; 1574 } 1575 /* determine if l2/3/4 headers are sent to firmware */ 1576 if ((*hdrs >> 7) & 1) { 1577 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1578 tx_crq.v1.n_crq_elem = num_entries; 1579 tx_buff->num_entries = num_entries; 1580 tx_buff->indir_arr[0] = tx_crq; 1581 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1582 sizeof(tx_buff->indir_arr), 1583 DMA_TO_DEVICE); 1584 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1585 dev_kfree_skb_any(skb); 1586 tx_buff->skb = NULL; 1587 if (!firmware_has_feature(FW_FEATURE_CMO)) 1588 dev_err(dev, "tx: unable to map descriptor array\n"); 1589 tx_map_failed++; 1590 tx_dropped++; 1591 ret = NETDEV_TX_OK; 1592 goto tx_err_out; 1593 } 1594 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1595 (u64)tx_buff->indir_dma, 1596 (u64)num_entries); 1597 } else { 1598 tx_buff->num_entries = num_entries; 1599 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1600 &tx_crq); 1601 } 1602 if (lpar_rc != H_SUCCESS) { 1603 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1604 dev_err_ratelimited(dev, "tx: send failed\n"); 1605 dev_kfree_skb_any(skb); 1606 tx_buff->skb = NULL; 1607 1608 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1609 /* Disable TX and report carrier off if queue is closed 1610 * or pending failover. 1611 * Firmware guarantees that a signal will be sent to the 1612 * driver, triggering a reset or some other action. 1613 */ 1614 netif_tx_stop_all_queues(netdev); 1615 netif_carrier_off(netdev); 1616 } 1617 1618 tx_send_failed++; 1619 tx_dropped++; 1620 ret = NETDEV_TX_OK; 1621 goto tx_err_out; 1622 } 1623 1624 if (atomic_add_return(num_entries, &tx_scrq->used) 1625 >= adapter->req_tx_entries_per_subcrq) { 1626 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1627 netif_stop_subqueue(netdev, queue_num); 1628 } 1629 1630 tx_packets++; 1631 tx_bytes += skb->len; 1632 txq->trans_start = jiffies; 1633 ret = NETDEV_TX_OK; 1634 goto out; 1635 1636 tx_err_out: 1637 /* roll back consumer index and map array*/ 1638 if (tx_pool->consumer_index == 0) 1639 tx_pool->consumer_index = 1640 tx_pool->num_buffers - 1; 1641 else 1642 tx_pool->consumer_index--; 1643 tx_pool->free_map[tx_pool->consumer_index] = index; 1644 out: 1645 netdev->stats.tx_dropped += tx_dropped; 1646 netdev->stats.tx_bytes += tx_bytes; 1647 netdev->stats.tx_packets += tx_packets; 1648 adapter->tx_send_failed += tx_send_failed; 1649 adapter->tx_map_failed += tx_map_failed; 1650 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1651 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1652 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1653 1654 return ret; 1655 } 1656 1657 static void ibmvnic_set_multi(struct net_device *netdev) 1658 { 1659 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1660 struct netdev_hw_addr *ha; 1661 union ibmvnic_crq crq; 1662 1663 memset(&crq, 0, sizeof(crq)); 1664 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1665 crq.request_capability.cmd = REQUEST_CAPABILITY; 1666 1667 if (netdev->flags & IFF_PROMISC) { 1668 if (!adapter->promisc_supported) 1669 return; 1670 } else { 1671 if (netdev->flags & IFF_ALLMULTI) { 1672 /* Accept all multicast */ 1673 memset(&crq, 0, sizeof(crq)); 1674 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1675 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1676 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1677 ibmvnic_send_crq(adapter, &crq); 1678 } else if (netdev_mc_empty(netdev)) { 1679 /* Reject all multicast */ 1680 memset(&crq, 0, sizeof(crq)); 1681 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1682 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1683 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1684 ibmvnic_send_crq(adapter, &crq); 1685 } else { 1686 /* Accept one or more multicast(s) */ 1687 netdev_for_each_mc_addr(ha, netdev) { 1688 memset(&crq, 0, sizeof(crq)); 1689 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1690 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1691 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1692 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1693 ha->addr); 1694 ibmvnic_send_crq(adapter, &crq); 1695 } 1696 } 1697 } 1698 } 1699 1700 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p) 1701 { 1702 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1703 struct sockaddr *addr = p; 1704 union ibmvnic_crq crq; 1705 int rc; 1706 1707 if (!is_valid_ether_addr(addr->sa_data)) 1708 return -EADDRNOTAVAIL; 1709 1710 memset(&crq, 0, sizeof(crq)); 1711 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1712 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1713 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1714 1715 init_completion(&adapter->fw_done); 1716 rc = ibmvnic_send_crq(adapter, &crq); 1717 if (rc) 1718 return rc; 1719 wait_for_completion(&adapter->fw_done); 1720 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1721 return adapter->fw_done_rc ? -EIO : 0; 1722 } 1723 1724 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1725 { 1726 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1727 struct sockaddr *addr = p; 1728 int rc; 1729 1730 if (adapter->state == VNIC_PROBED) { 1731 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); 1732 adapter->mac_change_pending = true; 1733 return 0; 1734 } 1735 1736 rc = __ibmvnic_set_mac(netdev, addr); 1737 1738 return rc; 1739 } 1740 1741 /** 1742 * do_reset returns zero if we are able to keep processing reset events, or 1743 * non-zero if we hit a fatal error and must halt. 1744 */ 1745 static int do_reset(struct ibmvnic_adapter *adapter, 1746 struct ibmvnic_rwi *rwi, u32 reset_state) 1747 { 1748 u64 old_num_rx_queues, old_num_tx_queues; 1749 struct net_device *netdev = adapter->netdev; 1750 int i, rc; 1751 1752 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1753 rwi->reset_reason); 1754 1755 netif_carrier_off(netdev); 1756 adapter->reset_reason = rwi->reset_reason; 1757 1758 old_num_rx_queues = adapter->req_rx_queues; 1759 old_num_tx_queues = adapter->req_tx_queues; 1760 1761 ibmvnic_cleanup(netdev); 1762 1763 if (adapter->reset_reason != VNIC_RESET_MOBILITY && 1764 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1765 rc = __ibmvnic_close(netdev); 1766 if (rc) 1767 return rc; 1768 } 1769 1770 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1771 adapter->wait_for_reset) { 1772 release_resources(adapter); 1773 release_sub_crqs(adapter, 1); 1774 release_crq_queue(adapter); 1775 } 1776 1777 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1778 /* remove the closed state so when we call open it appears 1779 * we are coming from the probed state. 1780 */ 1781 adapter->state = VNIC_PROBED; 1782 1783 if (adapter->wait_for_reset) { 1784 rc = init_crq_queue(adapter); 1785 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1786 rc = ibmvnic_reenable_crq_queue(adapter); 1787 release_sub_crqs(adapter, 1); 1788 } else { 1789 rc = ibmvnic_reset_crq(adapter); 1790 if (!rc) 1791 rc = vio_enable_interrupts(adapter->vdev); 1792 } 1793 1794 if (rc) { 1795 netdev_err(adapter->netdev, 1796 "Couldn't initialize crq. rc=%d\n", rc); 1797 return rc; 1798 } 1799 1800 rc = ibmvnic_reset_init(adapter); 1801 if (rc) 1802 return IBMVNIC_INIT_FAILED; 1803 1804 /* If the adapter was in PROBE state prior to the reset, 1805 * exit here. 1806 */ 1807 if (reset_state == VNIC_PROBED) 1808 return 0; 1809 1810 rc = ibmvnic_login(netdev); 1811 if (rc) { 1812 adapter->state = reset_state; 1813 return rc; 1814 } 1815 1816 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1817 adapter->wait_for_reset) { 1818 rc = init_resources(adapter); 1819 if (rc) 1820 return rc; 1821 } else if (adapter->req_rx_queues != old_num_rx_queues || 1822 adapter->req_tx_queues != old_num_tx_queues) { 1823 adapter->map_id = 1; 1824 release_rx_pools(adapter); 1825 release_tx_pools(adapter); 1826 init_rx_pools(netdev); 1827 init_tx_pools(netdev); 1828 1829 release_napi(adapter); 1830 init_napi(adapter); 1831 } else { 1832 rc = reset_tx_pools(adapter); 1833 if (rc) 1834 return rc; 1835 1836 rc = reset_rx_pools(adapter); 1837 if (rc) 1838 return rc; 1839 } 1840 ibmvnic_disable_irqs(adapter); 1841 } 1842 adapter->state = VNIC_CLOSED; 1843 1844 if (reset_state == VNIC_CLOSED) 1845 return 0; 1846 1847 rc = __ibmvnic_open(netdev); 1848 if (rc) { 1849 if (list_empty(&adapter->rwi_list)) 1850 adapter->state = VNIC_CLOSED; 1851 else 1852 adapter->state = reset_state; 1853 1854 return 0; 1855 } 1856 1857 /* kick napi */ 1858 for (i = 0; i < adapter->req_rx_queues; i++) 1859 napi_schedule(&adapter->napi[i]); 1860 1861 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 1862 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) 1863 netdev_notify_peers(netdev); 1864 1865 netif_carrier_on(netdev); 1866 1867 return 0; 1868 } 1869 1870 static int do_hard_reset(struct ibmvnic_adapter *adapter, 1871 struct ibmvnic_rwi *rwi, u32 reset_state) 1872 { 1873 struct net_device *netdev = adapter->netdev; 1874 int rc; 1875 1876 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 1877 rwi->reset_reason); 1878 1879 netif_carrier_off(netdev); 1880 adapter->reset_reason = rwi->reset_reason; 1881 1882 ibmvnic_cleanup(netdev); 1883 release_resources(adapter); 1884 release_sub_crqs(adapter, 0); 1885 release_crq_queue(adapter); 1886 1887 /* remove the closed state so when we call open it appears 1888 * we are coming from the probed state. 1889 */ 1890 adapter->state = VNIC_PROBED; 1891 1892 rc = init_crq_queue(adapter); 1893 if (rc) { 1894 netdev_err(adapter->netdev, 1895 "Couldn't initialize crq. rc=%d\n", rc); 1896 return rc; 1897 } 1898 1899 rc = ibmvnic_init(adapter); 1900 if (rc) 1901 return rc; 1902 1903 /* If the adapter was in PROBE state prior to the reset, 1904 * exit here. 1905 */ 1906 if (reset_state == VNIC_PROBED) 1907 return 0; 1908 1909 rc = ibmvnic_login(netdev); 1910 if (rc) { 1911 adapter->state = VNIC_PROBED; 1912 return 0; 1913 } 1914 /* netif_set_real_num_xx_queues needs to take rtnl lock here 1915 * unless wait_for_reset is set, in which case the rtnl lock 1916 * has already been taken before initializing the reset 1917 */ 1918 if (!adapter->wait_for_reset) { 1919 rtnl_lock(); 1920 rc = init_resources(adapter); 1921 rtnl_unlock(); 1922 } else { 1923 rc = init_resources(adapter); 1924 } 1925 if (rc) 1926 return rc; 1927 1928 ibmvnic_disable_irqs(adapter); 1929 adapter->state = VNIC_CLOSED; 1930 1931 if (reset_state == VNIC_CLOSED) 1932 return 0; 1933 1934 rc = __ibmvnic_open(netdev); 1935 if (rc) { 1936 if (list_empty(&adapter->rwi_list)) 1937 adapter->state = VNIC_CLOSED; 1938 else 1939 adapter->state = reset_state; 1940 1941 return 0; 1942 } 1943 1944 netif_carrier_on(netdev); 1945 1946 return 0; 1947 } 1948 1949 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1950 { 1951 struct ibmvnic_rwi *rwi; 1952 1953 mutex_lock(&adapter->rwi_lock); 1954 1955 if (!list_empty(&adapter->rwi_list)) { 1956 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1957 list); 1958 list_del(&rwi->list); 1959 } else { 1960 rwi = NULL; 1961 } 1962 1963 mutex_unlock(&adapter->rwi_lock); 1964 return rwi; 1965 } 1966 1967 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1968 { 1969 struct ibmvnic_rwi *rwi; 1970 1971 rwi = get_next_rwi(adapter); 1972 while (rwi) { 1973 kfree(rwi); 1974 rwi = get_next_rwi(adapter); 1975 } 1976 } 1977 1978 static void __ibmvnic_reset(struct work_struct *work) 1979 { 1980 struct ibmvnic_rwi *rwi; 1981 struct ibmvnic_adapter *adapter; 1982 struct net_device *netdev; 1983 u32 reset_state; 1984 int rc = 0; 1985 1986 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1987 netdev = adapter->netdev; 1988 1989 mutex_lock(&adapter->reset_lock); 1990 reset_state = adapter->state; 1991 1992 rwi = get_next_rwi(adapter); 1993 while (rwi) { 1994 if (adapter->force_reset_recovery) { 1995 adapter->force_reset_recovery = false; 1996 rc = do_hard_reset(adapter, rwi, reset_state); 1997 } else { 1998 rc = do_reset(adapter, rwi, reset_state); 1999 } 2000 kfree(rwi); 2001 if (rc && rc != IBMVNIC_INIT_FAILED && 2002 !adapter->force_reset_recovery) 2003 break; 2004 2005 rwi = get_next_rwi(adapter); 2006 } 2007 2008 if (adapter->wait_for_reset) { 2009 adapter->wait_for_reset = false; 2010 adapter->reset_done_rc = rc; 2011 complete(&adapter->reset_done); 2012 } 2013 2014 if (rc) { 2015 netdev_dbg(adapter->netdev, "Reset failed\n"); 2016 free_all_rwi(adapter); 2017 mutex_unlock(&adapter->reset_lock); 2018 return; 2019 } 2020 2021 adapter->resetting = false; 2022 mutex_unlock(&adapter->reset_lock); 2023 } 2024 2025 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2026 enum ibmvnic_reset_reason reason) 2027 { 2028 struct list_head *entry, *tmp_entry; 2029 struct ibmvnic_rwi *rwi, *tmp; 2030 struct net_device *netdev = adapter->netdev; 2031 int ret; 2032 2033 if (adapter->state == VNIC_REMOVING || 2034 adapter->state == VNIC_REMOVED || 2035 adapter->failover_pending) { 2036 ret = EBUSY; 2037 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2038 goto err; 2039 } 2040 2041 if (adapter->state == VNIC_PROBING) { 2042 netdev_warn(netdev, "Adapter reset during probe\n"); 2043 ret = adapter->init_done_rc = EAGAIN; 2044 goto err; 2045 } 2046 2047 mutex_lock(&adapter->rwi_lock); 2048 2049 list_for_each(entry, &adapter->rwi_list) { 2050 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2051 if (tmp->reset_reason == reason) { 2052 netdev_dbg(netdev, "Skipping matching reset\n"); 2053 mutex_unlock(&adapter->rwi_lock); 2054 ret = EBUSY; 2055 goto err; 2056 } 2057 } 2058 2059 rwi = kzalloc(sizeof(*rwi), GFP_KERNEL); 2060 if (!rwi) { 2061 mutex_unlock(&adapter->rwi_lock); 2062 ibmvnic_close(netdev); 2063 ret = ENOMEM; 2064 goto err; 2065 } 2066 /* if we just received a transport event, 2067 * flush reset queue and process this reset 2068 */ 2069 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2070 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2071 list_del(entry); 2072 } 2073 rwi->reset_reason = reason; 2074 list_add_tail(&rwi->list, &adapter->rwi_list); 2075 mutex_unlock(&adapter->rwi_lock); 2076 adapter->resetting = true; 2077 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2078 schedule_work(&adapter->ibmvnic_reset); 2079 2080 return 0; 2081 err: 2082 if (adapter->wait_for_reset) 2083 adapter->wait_for_reset = false; 2084 return -ret; 2085 } 2086 2087 static void ibmvnic_tx_timeout(struct net_device *dev) 2088 { 2089 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2090 2091 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2092 } 2093 2094 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2095 struct ibmvnic_rx_buff *rx_buff) 2096 { 2097 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2098 2099 rx_buff->skb = NULL; 2100 2101 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2102 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2103 2104 atomic_dec(&pool->available); 2105 } 2106 2107 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2108 { 2109 struct net_device *netdev = napi->dev; 2110 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2111 int scrq_num = (int)(napi - adapter->napi); 2112 int frames_processed = 0; 2113 2114 restart_poll: 2115 while (frames_processed < budget) { 2116 struct sk_buff *skb; 2117 struct ibmvnic_rx_buff *rx_buff; 2118 union sub_crq *next; 2119 u32 length; 2120 u16 offset; 2121 u8 flags = 0; 2122 2123 if (unlikely(adapter->resetting && 2124 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2125 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2126 napi_complete_done(napi, frames_processed); 2127 return frames_processed; 2128 } 2129 2130 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2131 break; 2132 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2133 rx_buff = 2134 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2135 rx_comp.correlator); 2136 /* do error checking */ 2137 if (next->rx_comp.rc) { 2138 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2139 be16_to_cpu(next->rx_comp.rc)); 2140 /* free the entry */ 2141 next->rx_comp.first = 0; 2142 dev_kfree_skb_any(rx_buff->skb); 2143 remove_buff_from_pool(adapter, rx_buff); 2144 continue; 2145 } else if (!rx_buff->skb) { 2146 /* free the entry */ 2147 next->rx_comp.first = 0; 2148 remove_buff_from_pool(adapter, rx_buff); 2149 continue; 2150 } 2151 2152 length = be32_to_cpu(next->rx_comp.len); 2153 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2154 flags = next->rx_comp.flags; 2155 skb = rx_buff->skb; 2156 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2157 length); 2158 2159 /* VLAN Header has been stripped by the system firmware and 2160 * needs to be inserted by the driver 2161 */ 2162 if (adapter->rx_vlan_header_insertion && 2163 (flags & IBMVNIC_VLAN_STRIPPED)) 2164 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2165 ntohs(next->rx_comp.vlan_tci)); 2166 2167 /* free the entry */ 2168 next->rx_comp.first = 0; 2169 remove_buff_from_pool(adapter, rx_buff); 2170 2171 skb_put(skb, length); 2172 skb->protocol = eth_type_trans(skb, netdev); 2173 skb_record_rx_queue(skb, scrq_num); 2174 2175 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2176 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2177 skb->ip_summed = CHECKSUM_UNNECESSARY; 2178 } 2179 2180 length = skb->len; 2181 napi_gro_receive(napi, skb); /* send it up */ 2182 netdev->stats.rx_packets++; 2183 netdev->stats.rx_bytes += length; 2184 adapter->rx_stats_buffers[scrq_num].packets++; 2185 adapter->rx_stats_buffers[scrq_num].bytes += length; 2186 frames_processed++; 2187 } 2188 2189 if (adapter->state != VNIC_CLOSING) 2190 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2191 2192 if (frames_processed < budget) { 2193 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2194 napi_complete_done(napi, frames_processed); 2195 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2196 napi_reschedule(napi)) { 2197 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2198 goto restart_poll; 2199 } 2200 } 2201 return frames_processed; 2202 } 2203 2204 #ifdef CONFIG_NET_POLL_CONTROLLER 2205 static void ibmvnic_netpoll_controller(struct net_device *dev) 2206 { 2207 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2208 int i; 2209 2210 replenish_pools(netdev_priv(dev)); 2211 for (i = 0; i < adapter->req_rx_queues; i++) 2212 ibmvnic_interrupt_rx(adapter->rx_scrq[i]->irq, 2213 adapter->rx_scrq[i]); 2214 } 2215 #endif 2216 2217 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2218 { 2219 int rc, ret; 2220 2221 adapter->fallback.mtu = adapter->req_mtu; 2222 adapter->fallback.rx_queues = adapter->req_rx_queues; 2223 adapter->fallback.tx_queues = adapter->req_tx_queues; 2224 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2225 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2226 2227 init_completion(&adapter->reset_done); 2228 adapter->wait_for_reset = true; 2229 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2230 if (rc) 2231 return rc; 2232 wait_for_completion(&adapter->reset_done); 2233 2234 ret = 0; 2235 if (adapter->reset_done_rc) { 2236 ret = -EIO; 2237 adapter->desired.mtu = adapter->fallback.mtu; 2238 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2239 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2240 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2241 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2242 2243 init_completion(&adapter->reset_done); 2244 adapter->wait_for_reset = true; 2245 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2246 if (rc) 2247 return ret; 2248 wait_for_completion(&adapter->reset_done); 2249 } 2250 adapter->wait_for_reset = false; 2251 2252 return ret; 2253 } 2254 2255 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2256 { 2257 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2258 2259 adapter->desired.mtu = new_mtu + ETH_HLEN; 2260 2261 return wait_for_reset(adapter); 2262 } 2263 2264 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2265 struct net_device *dev, 2266 netdev_features_t features) 2267 { 2268 /* Some backing hardware adapters can not 2269 * handle packets with a MSS less than 224 2270 * or with only one segment. 2271 */ 2272 if (skb_is_gso(skb)) { 2273 if (skb_shinfo(skb)->gso_size < 224 || 2274 skb_shinfo(skb)->gso_segs == 1) 2275 features &= ~NETIF_F_GSO_MASK; 2276 } 2277 2278 return features; 2279 } 2280 2281 static const struct net_device_ops ibmvnic_netdev_ops = { 2282 .ndo_open = ibmvnic_open, 2283 .ndo_stop = ibmvnic_close, 2284 .ndo_start_xmit = ibmvnic_xmit, 2285 .ndo_set_rx_mode = ibmvnic_set_multi, 2286 .ndo_set_mac_address = ibmvnic_set_mac, 2287 .ndo_validate_addr = eth_validate_addr, 2288 .ndo_tx_timeout = ibmvnic_tx_timeout, 2289 #ifdef CONFIG_NET_POLL_CONTROLLER 2290 .ndo_poll_controller = ibmvnic_netpoll_controller, 2291 #endif 2292 .ndo_change_mtu = ibmvnic_change_mtu, 2293 .ndo_features_check = ibmvnic_features_check, 2294 }; 2295 2296 /* ethtool functions */ 2297 2298 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2299 struct ethtool_link_ksettings *cmd) 2300 { 2301 u32 supported, advertising; 2302 2303 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 2304 SUPPORTED_FIBRE); 2305 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 2306 ADVERTISED_FIBRE); 2307 cmd->base.speed = SPEED_1000; 2308 cmd->base.duplex = DUPLEX_FULL; 2309 cmd->base.port = PORT_FIBRE; 2310 cmd->base.phy_address = 0; 2311 cmd->base.autoneg = AUTONEG_ENABLE; 2312 2313 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 2314 supported); 2315 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 2316 advertising); 2317 2318 return 0; 2319 } 2320 2321 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2322 struct ethtool_drvinfo *info) 2323 { 2324 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2325 2326 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2327 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2328 strlcpy(info->fw_version, adapter->fw_version, 2329 sizeof(info->fw_version)); 2330 } 2331 2332 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2333 { 2334 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2335 2336 return adapter->msg_enable; 2337 } 2338 2339 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2340 { 2341 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2342 2343 adapter->msg_enable = data; 2344 } 2345 2346 static u32 ibmvnic_get_link(struct net_device *netdev) 2347 { 2348 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2349 2350 /* Don't need to send a query because we request a logical link up at 2351 * init and then we wait for link state indications 2352 */ 2353 return adapter->logical_link_state; 2354 } 2355 2356 static void ibmvnic_get_ringparam(struct net_device *netdev, 2357 struct ethtool_ringparam *ring) 2358 { 2359 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2360 2361 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2362 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2363 ring->rx_mini_max_pending = 0; 2364 ring->rx_jumbo_max_pending = 0; 2365 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2366 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2367 ring->rx_mini_pending = 0; 2368 ring->rx_jumbo_pending = 0; 2369 } 2370 2371 static int ibmvnic_set_ringparam(struct net_device *netdev, 2372 struct ethtool_ringparam *ring) 2373 { 2374 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2375 2376 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 2377 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 2378 netdev_err(netdev, "Invalid request.\n"); 2379 netdev_err(netdev, "Max tx buffers = %llu\n", 2380 adapter->max_rx_add_entries_per_subcrq); 2381 netdev_err(netdev, "Max rx buffers = %llu\n", 2382 adapter->max_tx_entries_per_subcrq); 2383 return -EINVAL; 2384 } 2385 2386 adapter->desired.rx_entries = ring->rx_pending; 2387 adapter->desired.tx_entries = ring->tx_pending; 2388 2389 return wait_for_reset(adapter); 2390 } 2391 2392 static void ibmvnic_get_channels(struct net_device *netdev, 2393 struct ethtool_channels *channels) 2394 { 2395 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2396 2397 channels->max_rx = adapter->max_rx_queues; 2398 channels->max_tx = adapter->max_tx_queues; 2399 channels->max_other = 0; 2400 channels->max_combined = 0; 2401 channels->rx_count = adapter->req_rx_queues; 2402 channels->tx_count = adapter->req_tx_queues; 2403 channels->other_count = 0; 2404 channels->combined_count = 0; 2405 } 2406 2407 static int ibmvnic_set_channels(struct net_device *netdev, 2408 struct ethtool_channels *channels) 2409 { 2410 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2411 2412 adapter->desired.rx_queues = channels->rx_count; 2413 adapter->desired.tx_queues = channels->tx_count; 2414 2415 return wait_for_reset(adapter); 2416 } 2417 2418 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2419 { 2420 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2421 int i; 2422 2423 if (stringset != ETH_SS_STATS) 2424 return; 2425 2426 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN) 2427 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2428 2429 for (i = 0; i < adapter->req_tx_queues; i++) { 2430 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2431 data += ETH_GSTRING_LEN; 2432 2433 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2434 data += ETH_GSTRING_LEN; 2435 2436 snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i); 2437 data += ETH_GSTRING_LEN; 2438 } 2439 2440 for (i = 0; i < adapter->req_rx_queues; i++) { 2441 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2442 data += ETH_GSTRING_LEN; 2443 2444 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2445 data += ETH_GSTRING_LEN; 2446 2447 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2448 data += ETH_GSTRING_LEN; 2449 } 2450 } 2451 2452 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2453 { 2454 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2455 2456 switch (sset) { 2457 case ETH_SS_STATS: 2458 return ARRAY_SIZE(ibmvnic_stats) + 2459 adapter->req_tx_queues * NUM_TX_STATS + 2460 adapter->req_rx_queues * NUM_RX_STATS; 2461 default: 2462 return -EOPNOTSUPP; 2463 } 2464 } 2465 2466 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2467 struct ethtool_stats *stats, u64 *data) 2468 { 2469 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2470 union ibmvnic_crq crq; 2471 int i, j; 2472 int rc; 2473 2474 memset(&crq, 0, sizeof(crq)); 2475 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2476 crq.request_statistics.cmd = REQUEST_STATISTICS; 2477 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2478 crq.request_statistics.len = 2479 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2480 2481 /* Wait for data to be written */ 2482 init_completion(&adapter->stats_done); 2483 rc = ibmvnic_send_crq(adapter, &crq); 2484 if (rc) 2485 return; 2486 wait_for_completion(&adapter->stats_done); 2487 2488 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2489 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2490 ibmvnic_stats[i].offset)); 2491 2492 for (j = 0; j < adapter->req_tx_queues; j++) { 2493 data[i] = adapter->tx_stats_buffers[j].packets; 2494 i++; 2495 data[i] = adapter->tx_stats_buffers[j].bytes; 2496 i++; 2497 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2498 i++; 2499 } 2500 2501 for (j = 0; j < adapter->req_rx_queues; j++) { 2502 data[i] = adapter->rx_stats_buffers[j].packets; 2503 i++; 2504 data[i] = adapter->rx_stats_buffers[j].bytes; 2505 i++; 2506 data[i] = adapter->rx_stats_buffers[j].interrupts; 2507 i++; 2508 } 2509 } 2510 2511 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2512 .get_drvinfo = ibmvnic_get_drvinfo, 2513 .get_msglevel = ibmvnic_get_msglevel, 2514 .set_msglevel = ibmvnic_set_msglevel, 2515 .get_link = ibmvnic_get_link, 2516 .get_ringparam = ibmvnic_get_ringparam, 2517 .set_ringparam = ibmvnic_set_ringparam, 2518 .get_channels = ibmvnic_get_channels, 2519 .set_channels = ibmvnic_set_channels, 2520 .get_strings = ibmvnic_get_strings, 2521 .get_sset_count = ibmvnic_get_sset_count, 2522 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2523 .get_link_ksettings = ibmvnic_get_link_ksettings, 2524 }; 2525 2526 /* Routines for managing CRQs/sCRQs */ 2527 2528 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2529 struct ibmvnic_sub_crq_queue *scrq) 2530 { 2531 int rc; 2532 2533 if (scrq->irq) { 2534 free_irq(scrq->irq, scrq); 2535 irq_dispose_mapping(scrq->irq); 2536 scrq->irq = 0; 2537 } 2538 2539 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2540 atomic_set(&scrq->used, 0); 2541 scrq->cur = 0; 2542 2543 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2544 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2545 return rc; 2546 } 2547 2548 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2549 { 2550 int i, rc; 2551 2552 for (i = 0; i < adapter->req_tx_queues; i++) { 2553 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2554 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2555 if (rc) 2556 return rc; 2557 } 2558 2559 for (i = 0; i < adapter->req_rx_queues; i++) { 2560 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2561 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2562 if (rc) 2563 return rc; 2564 } 2565 2566 return rc; 2567 } 2568 2569 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2570 struct ibmvnic_sub_crq_queue *scrq, 2571 bool do_h_free) 2572 { 2573 struct device *dev = &adapter->vdev->dev; 2574 long rc; 2575 2576 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2577 2578 if (do_h_free) { 2579 /* Close the sub-crqs */ 2580 do { 2581 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2582 adapter->vdev->unit_address, 2583 scrq->crq_num); 2584 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2585 2586 if (rc) { 2587 netdev_err(adapter->netdev, 2588 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2589 scrq->crq_num, rc); 2590 } 2591 } 2592 2593 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2594 DMA_BIDIRECTIONAL); 2595 free_pages((unsigned long)scrq->msgs, 2); 2596 kfree(scrq); 2597 } 2598 2599 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2600 *adapter) 2601 { 2602 struct device *dev = &adapter->vdev->dev; 2603 struct ibmvnic_sub_crq_queue *scrq; 2604 int rc; 2605 2606 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2607 if (!scrq) 2608 return NULL; 2609 2610 scrq->msgs = 2611 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2612 if (!scrq->msgs) { 2613 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2614 goto zero_page_failed; 2615 } 2616 2617 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2618 DMA_BIDIRECTIONAL); 2619 if (dma_mapping_error(dev, scrq->msg_token)) { 2620 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2621 goto map_failed; 2622 } 2623 2624 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2625 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2626 2627 if (rc == H_RESOURCE) 2628 rc = ibmvnic_reset_crq(adapter); 2629 2630 if (rc == H_CLOSED) { 2631 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2632 } else if (rc) { 2633 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2634 goto reg_failed; 2635 } 2636 2637 scrq->adapter = adapter; 2638 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2639 spin_lock_init(&scrq->lock); 2640 2641 netdev_dbg(adapter->netdev, 2642 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2643 scrq->crq_num, scrq->hw_irq, scrq->irq); 2644 2645 return scrq; 2646 2647 reg_failed: 2648 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2649 DMA_BIDIRECTIONAL); 2650 map_failed: 2651 free_pages((unsigned long)scrq->msgs, 2); 2652 zero_page_failed: 2653 kfree(scrq); 2654 2655 return NULL; 2656 } 2657 2658 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2659 { 2660 int i; 2661 2662 if (adapter->tx_scrq) { 2663 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2664 if (!adapter->tx_scrq[i]) 2665 continue; 2666 2667 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2668 i); 2669 if (adapter->tx_scrq[i]->irq) { 2670 free_irq(adapter->tx_scrq[i]->irq, 2671 adapter->tx_scrq[i]); 2672 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2673 adapter->tx_scrq[i]->irq = 0; 2674 } 2675 2676 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2677 do_h_free); 2678 } 2679 2680 kfree(adapter->tx_scrq); 2681 adapter->tx_scrq = NULL; 2682 adapter->num_active_tx_scrqs = 0; 2683 } 2684 2685 if (adapter->rx_scrq) { 2686 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2687 if (!adapter->rx_scrq[i]) 2688 continue; 2689 2690 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2691 i); 2692 if (adapter->rx_scrq[i]->irq) { 2693 free_irq(adapter->rx_scrq[i]->irq, 2694 adapter->rx_scrq[i]); 2695 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2696 adapter->rx_scrq[i]->irq = 0; 2697 } 2698 2699 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2700 do_h_free); 2701 } 2702 2703 kfree(adapter->rx_scrq); 2704 adapter->rx_scrq = NULL; 2705 adapter->num_active_rx_scrqs = 0; 2706 } 2707 } 2708 2709 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2710 struct ibmvnic_sub_crq_queue *scrq) 2711 { 2712 struct device *dev = &adapter->vdev->dev; 2713 unsigned long rc; 2714 2715 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2716 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2717 if (rc) 2718 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2719 scrq->hw_irq, rc); 2720 return rc; 2721 } 2722 2723 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2724 struct ibmvnic_sub_crq_queue *scrq) 2725 { 2726 struct device *dev = &adapter->vdev->dev; 2727 unsigned long rc; 2728 2729 if (scrq->hw_irq > 0x100000000ULL) { 2730 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2731 return 1; 2732 } 2733 2734 if (adapter->resetting && 2735 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2736 u64 val = (0xff000000) | scrq->hw_irq; 2737 2738 rc = plpar_hcall_norets(H_EOI, val); 2739 if (rc) 2740 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 2741 val, rc); 2742 } 2743 2744 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2745 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2746 if (rc) 2747 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2748 scrq->hw_irq, rc); 2749 return rc; 2750 } 2751 2752 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2753 struct ibmvnic_sub_crq_queue *scrq) 2754 { 2755 struct device *dev = &adapter->vdev->dev; 2756 struct ibmvnic_tx_pool *tx_pool; 2757 struct ibmvnic_tx_buff *txbuff; 2758 union sub_crq *next; 2759 int index; 2760 int i, j; 2761 u8 *first; 2762 2763 restart_loop: 2764 while (pending_scrq(adapter, scrq)) { 2765 unsigned int pool = scrq->pool_index; 2766 int num_entries = 0; 2767 2768 next = ibmvnic_next_scrq(adapter, scrq); 2769 for (i = 0; i < next->tx_comp.num_comps; i++) { 2770 if (next->tx_comp.rcs[i]) { 2771 dev_err(dev, "tx error %x\n", 2772 next->tx_comp.rcs[i]); 2773 continue; 2774 } 2775 index = be32_to_cpu(next->tx_comp.correlators[i]); 2776 if (index & IBMVNIC_TSO_POOL_MASK) { 2777 tx_pool = &adapter->tso_pool[pool]; 2778 index &= ~IBMVNIC_TSO_POOL_MASK; 2779 } else { 2780 tx_pool = &adapter->tx_pool[pool]; 2781 } 2782 2783 txbuff = &tx_pool->tx_buff[index]; 2784 2785 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2786 if (!txbuff->data_dma[j]) 2787 continue; 2788 2789 txbuff->data_dma[j] = 0; 2790 } 2791 /* if sub_crq was sent indirectly */ 2792 first = &txbuff->indir_arr[0].generic.first; 2793 if (*first == IBMVNIC_CRQ_CMD) { 2794 dma_unmap_single(dev, txbuff->indir_dma, 2795 sizeof(txbuff->indir_arr), 2796 DMA_TO_DEVICE); 2797 *first = 0; 2798 } 2799 2800 if (txbuff->last_frag) { 2801 dev_kfree_skb_any(txbuff->skb); 2802 txbuff->skb = NULL; 2803 } 2804 2805 num_entries += txbuff->num_entries; 2806 2807 tx_pool->free_map[tx_pool->producer_index] = index; 2808 tx_pool->producer_index = 2809 (tx_pool->producer_index + 1) % 2810 tx_pool->num_buffers; 2811 } 2812 /* remove tx_comp scrq*/ 2813 next->tx_comp.first = 0; 2814 2815 if (atomic_sub_return(num_entries, &scrq->used) <= 2816 (adapter->req_tx_entries_per_subcrq / 2) && 2817 __netif_subqueue_stopped(adapter->netdev, 2818 scrq->pool_index)) { 2819 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2820 netdev_dbg(adapter->netdev, "Started queue %d\n", 2821 scrq->pool_index); 2822 } 2823 } 2824 2825 enable_scrq_irq(adapter, scrq); 2826 2827 if (pending_scrq(adapter, scrq)) { 2828 disable_scrq_irq(adapter, scrq); 2829 goto restart_loop; 2830 } 2831 2832 return 0; 2833 } 2834 2835 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2836 { 2837 struct ibmvnic_sub_crq_queue *scrq = instance; 2838 struct ibmvnic_adapter *adapter = scrq->adapter; 2839 2840 disable_scrq_irq(adapter, scrq); 2841 ibmvnic_complete_tx(adapter, scrq); 2842 2843 return IRQ_HANDLED; 2844 } 2845 2846 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2847 { 2848 struct ibmvnic_sub_crq_queue *scrq = instance; 2849 struct ibmvnic_adapter *adapter = scrq->adapter; 2850 2851 /* When booting a kdump kernel we can hit pending interrupts 2852 * prior to completing driver initialization. 2853 */ 2854 if (unlikely(adapter->state != VNIC_OPEN)) 2855 return IRQ_NONE; 2856 2857 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2858 2859 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2860 disable_scrq_irq(adapter, scrq); 2861 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2862 } 2863 2864 return IRQ_HANDLED; 2865 } 2866 2867 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2868 { 2869 struct device *dev = &adapter->vdev->dev; 2870 struct ibmvnic_sub_crq_queue *scrq; 2871 int i = 0, j = 0; 2872 int rc = 0; 2873 2874 for (i = 0; i < adapter->req_tx_queues; i++) { 2875 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2876 i); 2877 scrq = adapter->tx_scrq[i]; 2878 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2879 2880 if (!scrq->irq) { 2881 rc = -EINVAL; 2882 dev_err(dev, "Error mapping irq\n"); 2883 goto req_tx_irq_failed; 2884 } 2885 2886 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2887 0, "ibmvnic_tx", scrq); 2888 2889 if (rc) { 2890 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2891 scrq->irq, rc); 2892 irq_dispose_mapping(scrq->irq); 2893 goto req_tx_irq_failed; 2894 } 2895 } 2896 2897 for (i = 0; i < adapter->req_rx_queues; i++) { 2898 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2899 i); 2900 scrq = adapter->rx_scrq[i]; 2901 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2902 if (!scrq->irq) { 2903 rc = -EINVAL; 2904 dev_err(dev, "Error mapping irq\n"); 2905 goto req_rx_irq_failed; 2906 } 2907 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2908 0, "ibmvnic_rx", scrq); 2909 if (rc) { 2910 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2911 scrq->irq, rc); 2912 irq_dispose_mapping(scrq->irq); 2913 goto req_rx_irq_failed; 2914 } 2915 } 2916 return rc; 2917 2918 req_rx_irq_failed: 2919 for (j = 0; j < i; j++) { 2920 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2921 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2922 } 2923 i = adapter->req_tx_queues; 2924 req_tx_irq_failed: 2925 for (j = 0; j < i; j++) { 2926 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2927 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2928 } 2929 release_sub_crqs(adapter, 1); 2930 return rc; 2931 } 2932 2933 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2934 { 2935 struct device *dev = &adapter->vdev->dev; 2936 struct ibmvnic_sub_crq_queue **allqueues; 2937 int registered_queues = 0; 2938 int total_queues; 2939 int more = 0; 2940 int i; 2941 2942 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2943 2944 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2945 if (!allqueues) 2946 return -1; 2947 2948 for (i = 0; i < total_queues; i++) { 2949 allqueues[i] = init_sub_crq_queue(adapter); 2950 if (!allqueues[i]) { 2951 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2952 break; 2953 } 2954 registered_queues++; 2955 } 2956 2957 /* Make sure we were able to register the minimum number of queues */ 2958 if (registered_queues < 2959 adapter->min_tx_queues + adapter->min_rx_queues) { 2960 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 2961 goto tx_failed; 2962 } 2963 2964 /* Distribute the failed allocated queues*/ 2965 for (i = 0; i < total_queues - registered_queues + more ; i++) { 2966 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 2967 switch (i % 3) { 2968 case 0: 2969 if (adapter->req_rx_queues > adapter->min_rx_queues) 2970 adapter->req_rx_queues--; 2971 else 2972 more++; 2973 break; 2974 case 1: 2975 if (adapter->req_tx_queues > adapter->min_tx_queues) 2976 adapter->req_tx_queues--; 2977 else 2978 more++; 2979 break; 2980 } 2981 } 2982 2983 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 2984 sizeof(*adapter->tx_scrq), GFP_KERNEL); 2985 if (!adapter->tx_scrq) 2986 goto tx_failed; 2987 2988 for (i = 0; i < adapter->req_tx_queues; i++) { 2989 adapter->tx_scrq[i] = allqueues[i]; 2990 adapter->tx_scrq[i]->pool_index = i; 2991 adapter->num_active_tx_scrqs++; 2992 } 2993 2994 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 2995 sizeof(*adapter->rx_scrq), GFP_KERNEL); 2996 if (!adapter->rx_scrq) 2997 goto rx_failed; 2998 2999 for (i = 0; i < adapter->req_rx_queues; i++) { 3000 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3001 adapter->rx_scrq[i]->scrq_num = i; 3002 adapter->num_active_rx_scrqs++; 3003 } 3004 3005 kfree(allqueues); 3006 return 0; 3007 3008 rx_failed: 3009 kfree(adapter->tx_scrq); 3010 adapter->tx_scrq = NULL; 3011 tx_failed: 3012 for (i = 0; i < registered_queues; i++) 3013 release_sub_crq_queue(adapter, allqueues[i], 1); 3014 kfree(allqueues); 3015 return -1; 3016 } 3017 3018 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3019 { 3020 struct device *dev = &adapter->vdev->dev; 3021 union ibmvnic_crq crq; 3022 int max_entries; 3023 3024 if (!retry) { 3025 /* Sub-CRQ entries are 32 byte long */ 3026 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3027 3028 if (adapter->min_tx_entries_per_subcrq > entries_page || 3029 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3030 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3031 return; 3032 } 3033 3034 if (adapter->desired.mtu) 3035 adapter->req_mtu = adapter->desired.mtu; 3036 else 3037 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3038 3039 if (!adapter->desired.tx_entries) 3040 adapter->desired.tx_entries = 3041 adapter->max_tx_entries_per_subcrq; 3042 if (!adapter->desired.rx_entries) 3043 adapter->desired.rx_entries = 3044 adapter->max_rx_add_entries_per_subcrq; 3045 3046 max_entries = IBMVNIC_MAX_LTB_SIZE / 3047 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3048 3049 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3050 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3051 adapter->desired.tx_entries = max_entries; 3052 } 3053 3054 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3055 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3056 adapter->desired.rx_entries = max_entries; 3057 } 3058 3059 if (adapter->desired.tx_entries) 3060 adapter->req_tx_entries_per_subcrq = 3061 adapter->desired.tx_entries; 3062 else 3063 adapter->req_tx_entries_per_subcrq = 3064 adapter->max_tx_entries_per_subcrq; 3065 3066 if (adapter->desired.rx_entries) 3067 adapter->req_rx_add_entries_per_subcrq = 3068 adapter->desired.rx_entries; 3069 else 3070 adapter->req_rx_add_entries_per_subcrq = 3071 adapter->max_rx_add_entries_per_subcrq; 3072 3073 if (adapter->desired.tx_queues) 3074 adapter->req_tx_queues = 3075 adapter->desired.tx_queues; 3076 else 3077 adapter->req_tx_queues = 3078 adapter->opt_tx_comp_sub_queues; 3079 3080 if (adapter->desired.rx_queues) 3081 adapter->req_rx_queues = 3082 adapter->desired.rx_queues; 3083 else 3084 adapter->req_rx_queues = 3085 adapter->opt_rx_comp_queues; 3086 3087 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3088 } 3089 3090 memset(&crq, 0, sizeof(crq)); 3091 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3092 crq.request_capability.cmd = REQUEST_CAPABILITY; 3093 3094 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3095 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3096 atomic_inc(&adapter->running_cap_crqs); 3097 ibmvnic_send_crq(adapter, &crq); 3098 3099 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3100 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3101 atomic_inc(&adapter->running_cap_crqs); 3102 ibmvnic_send_crq(adapter, &crq); 3103 3104 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3105 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3106 atomic_inc(&adapter->running_cap_crqs); 3107 ibmvnic_send_crq(adapter, &crq); 3108 3109 crq.request_capability.capability = 3110 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3111 crq.request_capability.number = 3112 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3113 atomic_inc(&adapter->running_cap_crqs); 3114 ibmvnic_send_crq(adapter, &crq); 3115 3116 crq.request_capability.capability = 3117 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3118 crq.request_capability.number = 3119 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3120 atomic_inc(&adapter->running_cap_crqs); 3121 ibmvnic_send_crq(adapter, &crq); 3122 3123 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3124 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3125 atomic_inc(&adapter->running_cap_crqs); 3126 ibmvnic_send_crq(adapter, &crq); 3127 3128 if (adapter->netdev->flags & IFF_PROMISC) { 3129 if (adapter->promisc_supported) { 3130 crq.request_capability.capability = 3131 cpu_to_be16(PROMISC_REQUESTED); 3132 crq.request_capability.number = cpu_to_be64(1); 3133 atomic_inc(&adapter->running_cap_crqs); 3134 ibmvnic_send_crq(adapter, &crq); 3135 } 3136 } else { 3137 crq.request_capability.capability = 3138 cpu_to_be16(PROMISC_REQUESTED); 3139 crq.request_capability.number = cpu_to_be64(0); 3140 atomic_inc(&adapter->running_cap_crqs); 3141 ibmvnic_send_crq(adapter, &crq); 3142 } 3143 } 3144 3145 static int pending_scrq(struct ibmvnic_adapter *adapter, 3146 struct ibmvnic_sub_crq_queue *scrq) 3147 { 3148 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3149 3150 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3151 return 1; 3152 else 3153 return 0; 3154 } 3155 3156 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3157 struct ibmvnic_sub_crq_queue *scrq) 3158 { 3159 union sub_crq *entry; 3160 unsigned long flags; 3161 3162 spin_lock_irqsave(&scrq->lock, flags); 3163 entry = &scrq->msgs[scrq->cur]; 3164 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3165 if (++scrq->cur == scrq->size) 3166 scrq->cur = 0; 3167 } else { 3168 entry = NULL; 3169 } 3170 spin_unlock_irqrestore(&scrq->lock, flags); 3171 3172 return entry; 3173 } 3174 3175 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3176 { 3177 struct ibmvnic_crq_queue *queue = &adapter->crq; 3178 union ibmvnic_crq *crq; 3179 3180 crq = &queue->msgs[queue->cur]; 3181 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3182 if (++queue->cur == queue->size) 3183 queue->cur = 0; 3184 } else { 3185 crq = NULL; 3186 } 3187 3188 return crq; 3189 } 3190 3191 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3192 { 3193 switch (rc) { 3194 case H_PARAMETER: 3195 dev_warn_ratelimited(dev, 3196 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3197 func, rc); 3198 break; 3199 case H_CLOSED: 3200 dev_warn_ratelimited(dev, 3201 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3202 func, rc); 3203 break; 3204 default: 3205 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3206 break; 3207 } 3208 } 3209 3210 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3211 union sub_crq *sub_crq) 3212 { 3213 unsigned int ua = adapter->vdev->unit_address; 3214 struct device *dev = &adapter->vdev->dev; 3215 u64 *u64_crq = (u64 *)sub_crq; 3216 int rc; 3217 3218 netdev_dbg(adapter->netdev, 3219 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3220 (unsigned long int)cpu_to_be64(remote_handle), 3221 (unsigned long int)cpu_to_be64(u64_crq[0]), 3222 (unsigned long int)cpu_to_be64(u64_crq[1]), 3223 (unsigned long int)cpu_to_be64(u64_crq[2]), 3224 (unsigned long int)cpu_to_be64(u64_crq[3])); 3225 3226 /* Make sure the hypervisor sees the complete request */ 3227 mb(); 3228 3229 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3230 cpu_to_be64(remote_handle), 3231 cpu_to_be64(u64_crq[0]), 3232 cpu_to_be64(u64_crq[1]), 3233 cpu_to_be64(u64_crq[2]), 3234 cpu_to_be64(u64_crq[3])); 3235 3236 if (rc) 3237 print_subcrq_error(dev, rc, __func__); 3238 3239 return rc; 3240 } 3241 3242 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3243 u64 remote_handle, u64 ioba, u64 num_entries) 3244 { 3245 unsigned int ua = adapter->vdev->unit_address; 3246 struct device *dev = &adapter->vdev->dev; 3247 int rc; 3248 3249 /* Make sure the hypervisor sees the complete request */ 3250 mb(); 3251 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3252 cpu_to_be64(remote_handle), 3253 ioba, num_entries); 3254 3255 if (rc) 3256 print_subcrq_error(dev, rc, __func__); 3257 3258 return rc; 3259 } 3260 3261 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3262 union ibmvnic_crq *crq) 3263 { 3264 unsigned int ua = adapter->vdev->unit_address; 3265 struct device *dev = &adapter->vdev->dev; 3266 u64 *u64_crq = (u64 *)crq; 3267 int rc; 3268 3269 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3270 (unsigned long int)cpu_to_be64(u64_crq[0]), 3271 (unsigned long int)cpu_to_be64(u64_crq[1])); 3272 3273 if (!adapter->crq.active && 3274 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3275 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3276 return -EINVAL; 3277 } 3278 3279 /* Make sure the hypervisor sees the complete request */ 3280 mb(); 3281 3282 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3283 cpu_to_be64(u64_crq[0]), 3284 cpu_to_be64(u64_crq[1])); 3285 3286 if (rc) { 3287 if (rc == H_CLOSED) { 3288 dev_warn(dev, "CRQ Queue closed\n"); 3289 if (adapter->resetting) 3290 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3291 } 3292 3293 dev_warn(dev, "Send error (rc=%d)\n", rc); 3294 } 3295 3296 return rc; 3297 } 3298 3299 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3300 { 3301 union ibmvnic_crq crq; 3302 3303 memset(&crq, 0, sizeof(crq)); 3304 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3305 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3306 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3307 3308 return ibmvnic_send_crq(adapter, &crq); 3309 } 3310 3311 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3312 { 3313 union ibmvnic_crq crq; 3314 3315 memset(&crq, 0, sizeof(crq)); 3316 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3317 crq.version_exchange.cmd = VERSION_EXCHANGE; 3318 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3319 3320 return ibmvnic_send_crq(adapter, &crq); 3321 } 3322 3323 struct vnic_login_client_data { 3324 u8 type; 3325 __be16 len; 3326 char name[]; 3327 } __packed; 3328 3329 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3330 { 3331 int len; 3332 3333 /* Calculate the amount of buffer space needed for the 3334 * vnic client data in the login buffer. There are four entries, 3335 * OS name, LPAR name, device name, and a null last entry. 3336 */ 3337 len = 4 * sizeof(struct vnic_login_client_data); 3338 len += 6; /* "Linux" plus NULL */ 3339 len += strlen(utsname()->nodename) + 1; 3340 len += strlen(adapter->netdev->name) + 1; 3341 3342 return len; 3343 } 3344 3345 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3346 struct vnic_login_client_data *vlcd) 3347 { 3348 const char *os_name = "Linux"; 3349 int len; 3350 3351 /* Type 1 - LPAR OS */ 3352 vlcd->type = 1; 3353 len = strlen(os_name) + 1; 3354 vlcd->len = cpu_to_be16(len); 3355 strncpy(vlcd->name, os_name, len); 3356 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3357 3358 /* Type 2 - LPAR name */ 3359 vlcd->type = 2; 3360 len = strlen(utsname()->nodename) + 1; 3361 vlcd->len = cpu_to_be16(len); 3362 strncpy(vlcd->name, utsname()->nodename, len); 3363 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3364 3365 /* Type 3 - device name */ 3366 vlcd->type = 3; 3367 len = strlen(adapter->netdev->name) + 1; 3368 vlcd->len = cpu_to_be16(len); 3369 strncpy(vlcd->name, adapter->netdev->name, len); 3370 } 3371 3372 static int send_login(struct ibmvnic_adapter *adapter) 3373 { 3374 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3375 struct ibmvnic_login_buffer *login_buffer; 3376 struct device *dev = &adapter->vdev->dev; 3377 dma_addr_t rsp_buffer_token; 3378 dma_addr_t buffer_token; 3379 size_t rsp_buffer_size; 3380 union ibmvnic_crq crq; 3381 size_t buffer_size; 3382 __be64 *tx_list_p; 3383 __be64 *rx_list_p; 3384 int client_data_len; 3385 struct vnic_login_client_data *vlcd; 3386 int i; 3387 3388 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3389 netdev_err(adapter->netdev, 3390 "RX or TX queues are not allocated, device login failed\n"); 3391 return -1; 3392 } 3393 3394 release_login_rsp_buffer(adapter); 3395 client_data_len = vnic_client_data_len(adapter); 3396 3397 buffer_size = 3398 sizeof(struct ibmvnic_login_buffer) + 3399 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3400 client_data_len; 3401 3402 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3403 if (!login_buffer) 3404 goto buf_alloc_failed; 3405 3406 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3407 DMA_TO_DEVICE); 3408 if (dma_mapping_error(dev, buffer_token)) { 3409 dev_err(dev, "Couldn't map login buffer\n"); 3410 goto buf_map_failed; 3411 } 3412 3413 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3414 sizeof(u64) * adapter->req_tx_queues + 3415 sizeof(u64) * adapter->req_rx_queues + 3416 sizeof(u64) * adapter->req_rx_queues + 3417 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3418 3419 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3420 if (!login_rsp_buffer) 3421 goto buf_rsp_alloc_failed; 3422 3423 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3424 rsp_buffer_size, DMA_FROM_DEVICE); 3425 if (dma_mapping_error(dev, rsp_buffer_token)) { 3426 dev_err(dev, "Couldn't map login rsp buffer\n"); 3427 goto buf_rsp_map_failed; 3428 } 3429 3430 adapter->login_buf = login_buffer; 3431 adapter->login_buf_token = buffer_token; 3432 adapter->login_buf_sz = buffer_size; 3433 adapter->login_rsp_buf = login_rsp_buffer; 3434 adapter->login_rsp_buf_token = rsp_buffer_token; 3435 adapter->login_rsp_buf_sz = rsp_buffer_size; 3436 3437 login_buffer->len = cpu_to_be32(buffer_size); 3438 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3439 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3440 login_buffer->off_txcomp_subcrqs = 3441 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3442 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3443 login_buffer->off_rxcomp_subcrqs = 3444 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3445 sizeof(u64) * adapter->req_tx_queues); 3446 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3447 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3448 3449 tx_list_p = (__be64 *)((char *)login_buffer + 3450 sizeof(struct ibmvnic_login_buffer)); 3451 rx_list_p = (__be64 *)((char *)login_buffer + 3452 sizeof(struct ibmvnic_login_buffer) + 3453 sizeof(u64) * adapter->req_tx_queues); 3454 3455 for (i = 0; i < adapter->req_tx_queues; i++) { 3456 if (adapter->tx_scrq[i]) { 3457 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3458 crq_num); 3459 } 3460 } 3461 3462 for (i = 0; i < adapter->req_rx_queues; i++) { 3463 if (adapter->rx_scrq[i]) { 3464 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3465 crq_num); 3466 } 3467 } 3468 3469 /* Insert vNIC login client data */ 3470 vlcd = (struct vnic_login_client_data *) 3471 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3472 login_buffer->client_data_offset = 3473 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3474 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3475 3476 vnic_add_client_data(adapter, vlcd); 3477 3478 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3479 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3480 netdev_dbg(adapter->netdev, "%016lx\n", 3481 ((unsigned long int *)(adapter->login_buf))[i]); 3482 } 3483 3484 memset(&crq, 0, sizeof(crq)); 3485 crq.login.first = IBMVNIC_CRQ_CMD; 3486 crq.login.cmd = LOGIN; 3487 crq.login.ioba = cpu_to_be32(buffer_token); 3488 crq.login.len = cpu_to_be32(buffer_size); 3489 ibmvnic_send_crq(adapter, &crq); 3490 3491 return 0; 3492 3493 buf_rsp_map_failed: 3494 kfree(login_rsp_buffer); 3495 buf_rsp_alloc_failed: 3496 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3497 buf_map_failed: 3498 kfree(login_buffer); 3499 buf_alloc_failed: 3500 return -1; 3501 } 3502 3503 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3504 u32 len, u8 map_id) 3505 { 3506 union ibmvnic_crq crq; 3507 3508 memset(&crq, 0, sizeof(crq)); 3509 crq.request_map.first = IBMVNIC_CRQ_CMD; 3510 crq.request_map.cmd = REQUEST_MAP; 3511 crq.request_map.map_id = map_id; 3512 crq.request_map.ioba = cpu_to_be32(addr); 3513 crq.request_map.len = cpu_to_be32(len); 3514 return ibmvnic_send_crq(adapter, &crq); 3515 } 3516 3517 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3518 { 3519 union ibmvnic_crq crq; 3520 3521 memset(&crq, 0, sizeof(crq)); 3522 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3523 crq.request_unmap.cmd = REQUEST_UNMAP; 3524 crq.request_unmap.map_id = map_id; 3525 return ibmvnic_send_crq(adapter, &crq); 3526 } 3527 3528 static void send_map_query(struct ibmvnic_adapter *adapter) 3529 { 3530 union ibmvnic_crq crq; 3531 3532 memset(&crq, 0, sizeof(crq)); 3533 crq.query_map.first = IBMVNIC_CRQ_CMD; 3534 crq.query_map.cmd = QUERY_MAP; 3535 ibmvnic_send_crq(adapter, &crq); 3536 } 3537 3538 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3539 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3540 { 3541 union ibmvnic_crq crq; 3542 3543 atomic_set(&adapter->running_cap_crqs, 0); 3544 memset(&crq, 0, sizeof(crq)); 3545 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3546 crq.query_capability.cmd = QUERY_CAPABILITY; 3547 3548 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3549 atomic_inc(&adapter->running_cap_crqs); 3550 ibmvnic_send_crq(adapter, &crq); 3551 3552 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3553 atomic_inc(&adapter->running_cap_crqs); 3554 ibmvnic_send_crq(adapter, &crq); 3555 3556 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3557 atomic_inc(&adapter->running_cap_crqs); 3558 ibmvnic_send_crq(adapter, &crq); 3559 3560 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3561 atomic_inc(&adapter->running_cap_crqs); 3562 ibmvnic_send_crq(adapter, &crq); 3563 3564 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3565 atomic_inc(&adapter->running_cap_crqs); 3566 ibmvnic_send_crq(adapter, &crq); 3567 3568 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3569 atomic_inc(&adapter->running_cap_crqs); 3570 ibmvnic_send_crq(adapter, &crq); 3571 3572 crq.query_capability.capability = 3573 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3574 atomic_inc(&adapter->running_cap_crqs); 3575 ibmvnic_send_crq(adapter, &crq); 3576 3577 crq.query_capability.capability = 3578 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3579 atomic_inc(&adapter->running_cap_crqs); 3580 ibmvnic_send_crq(adapter, &crq); 3581 3582 crq.query_capability.capability = 3583 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3584 atomic_inc(&adapter->running_cap_crqs); 3585 ibmvnic_send_crq(adapter, &crq); 3586 3587 crq.query_capability.capability = 3588 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3589 atomic_inc(&adapter->running_cap_crqs); 3590 ibmvnic_send_crq(adapter, &crq); 3591 3592 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3593 atomic_inc(&adapter->running_cap_crqs); 3594 ibmvnic_send_crq(adapter, &crq); 3595 3596 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3597 atomic_inc(&adapter->running_cap_crqs); 3598 ibmvnic_send_crq(adapter, &crq); 3599 3600 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3601 atomic_inc(&adapter->running_cap_crqs); 3602 ibmvnic_send_crq(adapter, &crq); 3603 3604 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3605 atomic_inc(&adapter->running_cap_crqs); 3606 ibmvnic_send_crq(adapter, &crq); 3607 3608 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3609 atomic_inc(&adapter->running_cap_crqs); 3610 ibmvnic_send_crq(adapter, &crq); 3611 3612 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3613 atomic_inc(&adapter->running_cap_crqs); 3614 ibmvnic_send_crq(adapter, &crq); 3615 3616 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3617 atomic_inc(&adapter->running_cap_crqs); 3618 ibmvnic_send_crq(adapter, &crq); 3619 3620 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3621 atomic_inc(&adapter->running_cap_crqs); 3622 ibmvnic_send_crq(adapter, &crq); 3623 3624 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3625 atomic_inc(&adapter->running_cap_crqs); 3626 ibmvnic_send_crq(adapter, &crq); 3627 3628 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3629 atomic_inc(&adapter->running_cap_crqs); 3630 ibmvnic_send_crq(adapter, &crq); 3631 3632 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3633 atomic_inc(&adapter->running_cap_crqs); 3634 ibmvnic_send_crq(adapter, &crq); 3635 3636 crq.query_capability.capability = 3637 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3638 atomic_inc(&adapter->running_cap_crqs); 3639 ibmvnic_send_crq(adapter, &crq); 3640 3641 crq.query_capability.capability = 3642 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3643 atomic_inc(&adapter->running_cap_crqs); 3644 ibmvnic_send_crq(adapter, &crq); 3645 3646 crq.query_capability.capability = 3647 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3648 atomic_inc(&adapter->running_cap_crqs); 3649 ibmvnic_send_crq(adapter, &crq); 3650 3651 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3652 atomic_inc(&adapter->running_cap_crqs); 3653 ibmvnic_send_crq(adapter, &crq); 3654 } 3655 3656 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3657 struct ibmvnic_adapter *adapter) 3658 { 3659 struct device *dev = &adapter->vdev->dev; 3660 3661 if (crq->get_vpd_size_rsp.rc.code) { 3662 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3663 crq->get_vpd_size_rsp.rc.code); 3664 complete(&adapter->fw_done); 3665 return; 3666 } 3667 3668 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3669 complete(&adapter->fw_done); 3670 } 3671 3672 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3673 struct ibmvnic_adapter *adapter) 3674 { 3675 struct device *dev = &adapter->vdev->dev; 3676 unsigned char *substr = NULL; 3677 u8 fw_level_len = 0; 3678 3679 memset(adapter->fw_version, 0, 32); 3680 3681 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3682 DMA_FROM_DEVICE); 3683 3684 if (crq->get_vpd_rsp.rc.code) { 3685 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3686 crq->get_vpd_rsp.rc.code); 3687 goto complete; 3688 } 3689 3690 /* get the position of the firmware version info 3691 * located after the ASCII 'RM' substring in the buffer 3692 */ 3693 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3694 if (!substr) { 3695 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3696 goto complete; 3697 } 3698 3699 /* get length of firmware level ASCII substring */ 3700 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3701 fw_level_len = *(substr + 2); 3702 } else { 3703 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3704 goto complete; 3705 } 3706 3707 /* copy firmware version string from vpd into adapter */ 3708 if ((substr + 3 + fw_level_len) < 3709 (adapter->vpd->buff + adapter->vpd->len)) { 3710 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3711 } else { 3712 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3713 } 3714 3715 complete: 3716 if (adapter->fw_version[0] == '\0') 3717 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3718 complete(&adapter->fw_done); 3719 } 3720 3721 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3722 { 3723 struct device *dev = &adapter->vdev->dev; 3724 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3725 union ibmvnic_crq crq; 3726 int i; 3727 3728 dma_unmap_single(dev, adapter->ip_offload_tok, 3729 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3730 3731 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3732 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3733 netdev_dbg(adapter->netdev, "%016lx\n", 3734 ((unsigned long int *)(buf))[i]); 3735 3736 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3737 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3738 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3739 buf->tcp_ipv4_chksum); 3740 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3741 buf->tcp_ipv6_chksum); 3742 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3743 buf->udp_ipv4_chksum); 3744 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3745 buf->udp_ipv6_chksum); 3746 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3747 buf->large_tx_ipv4); 3748 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3749 buf->large_tx_ipv6); 3750 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3751 buf->large_rx_ipv4); 3752 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3753 buf->large_rx_ipv6); 3754 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3755 buf->max_ipv4_header_size); 3756 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3757 buf->max_ipv6_header_size); 3758 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3759 buf->max_tcp_header_size); 3760 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3761 buf->max_udp_header_size); 3762 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3763 buf->max_large_tx_size); 3764 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3765 buf->max_large_rx_size); 3766 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3767 buf->ipv6_extension_header); 3768 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3769 buf->tcp_pseudosum_req); 3770 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3771 buf->num_ipv6_ext_headers); 3772 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3773 buf->off_ipv6_ext_headers); 3774 3775 adapter->ip_offload_ctrl_tok = 3776 dma_map_single(dev, &adapter->ip_offload_ctrl, 3777 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3778 3779 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3780 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3781 return; 3782 } 3783 3784 adapter->ip_offload_ctrl.len = 3785 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3786 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3787 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3788 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3789 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3790 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3791 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3792 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3793 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3794 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3795 3796 /* large_rx disabled for now, additional features needed */ 3797 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3798 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3799 3800 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; 3801 3802 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3803 adapter->netdev->features |= NETIF_F_IP_CSUM; 3804 3805 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3806 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 3807 3808 if ((adapter->netdev->features & 3809 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3810 adapter->netdev->features |= NETIF_F_RXCSUM; 3811 3812 if (buf->large_tx_ipv4) 3813 adapter->netdev->features |= NETIF_F_TSO; 3814 if (buf->large_tx_ipv6) 3815 adapter->netdev->features |= NETIF_F_TSO6; 3816 3817 adapter->netdev->hw_features |= adapter->netdev->features; 3818 3819 memset(&crq, 0, sizeof(crq)); 3820 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3821 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3822 crq.control_ip_offload.len = 3823 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3824 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3825 ibmvnic_send_crq(adapter, &crq); 3826 } 3827 3828 static const char *ibmvnic_fw_err_cause(u16 cause) 3829 { 3830 switch (cause) { 3831 case ADAPTER_PROBLEM: 3832 return "adapter problem"; 3833 case BUS_PROBLEM: 3834 return "bus problem"; 3835 case FW_PROBLEM: 3836 return "firmware problem"; 3837 case DD_PROBLEM: 3838 return "device driver problem"; 3839 case EEH_RECOVERY: 3840 return "EEH recovery"; 3841 case FW_UPDATED: 3842 return "firmware updated"; 3843 case LOW_MEMORY: 3844 return "low Memory"; 3845 default: 3846 return "unknown"; 3847 } 3848 } 3849 3850 static void handle_error_indication(union ibmvnic_crq *crq, 3851 struct ibmvnic_adapter *adapter) 3852 { 3853 struct device *dev = &adapter->vdev->dev; 3854 u16 cause; 3855 3856 cause = be16_to_cpu(crq->error_indication.error_cause); 3857 3858 dev_warn_ratelimited(dev, 3859 "Firmware reports %serror, cause: %s. Starting recovery...\n", 3860 crq->error_indication.flags 3861 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3862 ibmvnic_fw_err_cause(cause)); 3863 3864 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3865 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3866 else 3867 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3868 } 3869 3870 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3871 struct ibmvnic_adapter *adapter) 3872 { 3873 struct net_device *netdev = adapter->netdev; 3874 struct device *dev = &adapter->vdev->dev; 3875 long rc; 3876 3877 rc = crq->change_mac_addr_rsp.rc.code; 3878 if (rc) { 3879 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3880 goto out; 3881 } 3882 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 3883 ETH_ALEN); 3884 out: 3885 complete(&adapter->fw_done); 3886 return rc; 3887 } 3888 3889 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3890 struct ibmvnic_adapter *adapter) 3891 { 3892 struct device *dev = &adapter->vdev->dev; 3893 u64 *req_value; 3894 char *name; 3895 3896 atomic_dec(&adapter->running_cap_crqs); 3897 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3898 case REQ_TX_QUEUES: 3899 req_value = &adapter->req_tx_queues; 3900 name = "tx"; 3901 break; 3902 case REQ_RX_QUEUES: 3903 req_value = &adapter->req_rx_queues; 3904 name = "rx"; 3905 break; 3906 case REQ_RX_ADD_QUEUES: 3907 req_value = &adapter->req_rx_add_queues; 3908 name = "rx_add"; 3909 break; 3910 case REQ_TX_ENTRIES_PER_SUBCRQ: 3911 req_value = &adapter->req_tx_entries_per_subcrq; 3912 name = "tx_entries_per_subcrq"; 3913 break; 3914 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3915 req_value = &adapter->req_rx_add_entries_per_subcrq; 3916 name = "rx_add_entries_per_subcrq"; 3917 break; 3918 case REQ_MTU: 3919 req_value = &adapter->req_mtu; 3920 name = "mtu"; 3921 break; 3922 case PROMISC_REQUESTED: 3923 req_value = &adapter->promisc; 3924 name = "promisc"; 3925 break; 3926 default: 3927 dev_err(dev, "Got invalid cap request rsp %d\n", 3928 crq->request_capability.capability); 3929 return; 3930 } 3931 3932 switch (crq->request_capability_rsp.rc.code) { 3933 case SUCCESS: 3934 break; 3935 case PARTIALSUCCESS: 3936 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3937 *req_value, 3938 (long int)be64_to_cpu(crq->request_capability_rsp. 3939 number), name); 3940 3941 if (be16_to_cpu(crq->request_capability_rsp.capability) == 3942 REQ_MTU) { 3943 pr_err("mtu of %llu is not supported. Reverting.\n", 3944 *req_value); 3945 *req_value = adapter->fallback.mtu; 3946 } else { 3947 *req_value = 3948 be64_to_cpu(crq->request_capability_rsp.number); 3949 } 3950 3951 ibmvnic_send_req_caps(adapter, 1); 3952 return; 3953 default: 3954 dev_err(dev, "Error %d in request cap rsp\n", 3955 crq->request_capability_rsp.rc.code); 3956 return; 3957 } 3958 3959 /* Done receiving requested capabilities, query IP offload support */ 3960 if (atomic_read(&adapter->running_cap_crqs) == 0) { 3961 union ibmvnic_crq newcrq; 3962 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 3963 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 3964 &adapter->ip_offload_buf; 3965 3966 adapter->wait_capability = false; 3967 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 3968 buf_sz, 3969 DMA_FROM_DEVICE); 3970 3971 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 3972 if (!firmware_has_feature(FW_FEATURE_CMO)) 3973 dev_err(dev, "Couldn't map offload buffer\n"); 3974 return; 3975 } 3976 3977 memset(&newcrq, 0, sizeof(newcrq)); 3978 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 3979 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 3980 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 3981 newcrq.query_ip_offload.ioba = 3982 cpu_to_be32(adapter->ip_offload_tok); 3983 3984 ibmvnic_send_crq(adapter, &newcrq); 3985 } 3986 } 3987 3988 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 3989 struct ibmvnic_adapter *adapter) 3990 { 3991 struct device *dev = &adapter->vdev->dev; 3992 struct net_device *netdev = adapter->netdev; 3993 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 3994 struct ibmvnic_login_buffer *login = adapter->login_buf; 3995 int i; 3996 3997 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 3998 DMA_TO_DEVICE); 3999 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4000 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4001 4002 /* If the number of queues requested can't be allocated by the 4003 * server, the login response will return with code 1. We will need 4004 * to resend the login buffer with fewer queues requested. 4005 */ 4006 if (login_rsp_crq->generic.rc.code) { 4007 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4008 complete(&adapter->init_done); 4009 return 0; 4010 } 4011 4012 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4013 4014 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4015 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4016 netdev_dbg(adapter->netdev, "%016lx\n", 4017 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4018 } 4019 4020 /* Sanity checks */ 4021 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4022 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4023 adapter->req_rx_add_queues != 4024 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4025 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4026 ibmvnic_remove(adapter->vdev); 4027 return -EIO; 4028 } 4029 release_login_buffer(adapter); 4030 complete(&adapter->init_done); 4031 4032 return 0; 4033 } 4034 4035 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4036 struct ibmvnic_adapter *adapter) 4037 { 4038 struct device *dev = &adapter->vdev->dev; 4039 long rc; 4040 4041 rc = crq->request_unmap_rsp.rc.code; 4042 if (rc) 4043 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4044 } 4045 4046 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4047 struct ibmvnic_adapter *adapter) 4048 { 4049 struct net_device *netdev = adapter->netdev; 4050 struct device *dev = &adapter->vdev->dev; 4051 long rc; 4052 4053 rc = crq->query_map_rsp.rc.code; 4054 if (rc) { 4055 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4056 return; 4057 } 4058 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4059 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4060 crq->query_map_rsp.free_pages); 4061 } 4062 4063 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4064 struct ibmvnic_adapter *adapter) 4065 { 4066 struct net_device *netdev = adapter->netdev; 4067 struct device *dev = &adapter->vdev->dev; 4068 long rc; 4069 4070 atomic_dec(&adapter->running_cap_crqs); 4071 netdev_dbg(netdev, "Outstanding queries: %d\n", 4072 atomic_read(&adapter->running_cap_crqs)); 4073 rc = crq->query_capability.rc.code; 4074 if (rc) { 4075 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4076 goto out; 4077 } 4078 4079 switch (be16_to_cpu(crq->query_capability.capability)) { 4080 case MIN_TX_QUEUES: 4081 adapter->min_tx_queues = 4082 be64_to_cpu(crq->query_capability.number); 4083 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4084 adapter->min_tx_queues); 4085 break; 4086 case MIN_RX_QUEUES: 4087 adapter->min_rx_queues = 4088 be64_to_cpu(crq->query_capability.number); 4089 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4090 adapter->min_rx_queues); 4091 break; 4092 case MIN_RX_ADD_QUEUES: 4093 adapter->min_rx_add_queues = 4094 be64_to_cpu(crq->query_capability.number); 4095 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4096 adapter->min_rx_add_queues); 4097 break; 4098 case MAX_TX_QUEUES: 4099 adapter->max_tx_queues = 4100 be64_to_cpu(crq->query_capability.number); 4101 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4102 adapter->max_tx_queues); 4103 break; 4104 case MAX_RX_QUEUES: 4105 adapter->max_rx_queues = 4106 be64_to_cpu(crq->query_capability.number); 4107 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4108 adapter->max_rx_queues); 4109 break; 4110 case MAX_RX_ADD_QUEUES: 4111 adapter->max_rx_add_queues = 4112 be64_to_cpu(crq->query_capability.number); 4113 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4114 adapter->max_rx_add_queues); 4115 break; 4116 case MIN_TX_ENTRIES_PER_SUBCRQ: 4117 adapter->min_tx_entries_per_subcrq = 4118 be64_to_cpu(crq->query_capability.number); 4119 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4120 adapter->min_tx_entries_per_subcrq); 4121 break; 4122 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4123 adapter->min_rx_add_entries_per_subcrq = 4124 be64_to_cpu(crq->query_capability.number); 4125 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4126 adapter->min_rx_add_entries_per_subcrq); 4127 break; 4128 case MAX_TX_ENTRIES_PER_SUBCRQ: 4129 adapter->max_tx_entries_per_subcrq = 4130 be64_to_cpu(crq->query_capability.number); 4131 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4132 adapter->max_tx_entries_per_subcrq); 4133 break; 4134 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4135 adapter->max_rx_add_entries_per_subcrq = 4136 be64_to_cpu(crq->query_capability.number); 4137 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4138 adapter->max_rx_add_entries_per_subcrq); 4139 break; 4140 case TCP_IP_OFFLOAD: 4141 adapter->tcp_ip_offload = 4142 be64_to_cpu(crq->query_capability.number); 4143 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4144 adapter->tcp_ip_offload); 4145 break; 4146 case PROMISC_SUPPORTED: 4147 adapter->promisc_supported = 4148 be64_to_cpu(crq->query_capability.number); 4149 netdev_dbg(netdev, "promisc_supported = %lld\n", 4150 adapter->promisc_supported); 4151 break; 4152 case MIN_MTU: 4153 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4154 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4155 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4156 break; 4157 case MAX_MTU: 4158 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4159 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4160 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4161 break; 4162 case MAX_MULTICAST_FILTERS: 4163 adapter->max_multicast_filters = 4164 be64_to_cpu(crq->query_capability.number); 4165 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4166 adapter->max_multicast_filters); 4167 break; 4168 case VLAN_HEADER_INSERTION: 4169 adapter->vlan_header_insertion = 4170 be64_to_cpu(crq->query_capability.number); 4171 if (adapter->vlan_header_insertion) 4172 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4173 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4174 adapter->vlan_header_insertion); 4175 break; 4176 case RX_VLAN_HEADER_INSERTION: 4177 adapter->rx_vlan_header_insertion = 4178 be64_to_cpu(crq->query_capability.number); 4179 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4180 adapter->rx_vlan_header_insertion); 4181 break; 4182 case MAX_TX_SG_ENTRIES: 4183 adapter->max_tx_sg_entries = 4184 be64_to_cpu(crq->query_capability.number); 4185 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4186 adapter->max_tx_sg_entries); 4187 break; 4188 case RX_SG_SUPPORTED: 4189 adapter->rx_sg_supported = 4190 be64_to_cpu(crq->query_capability.number); 4191 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4192 adapter->rx_sg_supported); 4193 break; 4194 case OPT_TX_COMP_SUB_QUEUES: 4195 adapter->opt_tx_comp_sub_queues = 4196 be64_to_cpu(crq->query_capability.number); 4197 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4198 adapter->opt_tx_comp_sub_queues); 4199 break; 4200 case OPT_RX_COMP_QUEUES: 4201 adapter->opt_rx_comp_queues = 4202 be64_to_cpu(crq->query_capability.number); 4203 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4204 adapter->opt_rx_comp_queues); 4205 break; 4206 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4207 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4208 be64_to_cpu(crq->query_capability.number); 4209 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4210 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4211 break; 4212 case OPT_TX_ENTRIES_PER_SUBCRQ: 4213 adapter->opt_tx_entries_per_subcrq = 4214 be64_to_cpu(crq->query_capability.number); 4215 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4216 adapter->opt_tx_entries_per_subcrq); 4217 break; 4218 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4219 adapter->opt_rxba_entries_per_subcrq = 4220 be64_to_cpu(crq->query_capability.number); 4221 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4222 adapter->opt_rxba_entries_per_subcrq); 4223 break; 4224 case TX_RX_DESC_REQ: 4225 adapter->tx_rx_desc_req = crq->query_capability.number; 4226 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4227 adapter->tx_rx_desc_req); 4228 break; 4229 4230 default: 4231 netdev_err(netdev, "Got invalid cap rsp %d\n", 4232 crq->query_capability.capability); 4233 } 4234 4235 out: 4236 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4237 adapter->wait_capability = false; 4238 ibmvnic_send_req_caps(adapter, 0); 4239 } 4240 } 4241 4242 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4243 struct ibmvnic_adapter *adapter) 4244 { 4245 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4246 struct net_device *netdev = adapter->netdev; 4247 struct device *dev = &adapter->vdev->dev; 4248 u64 *u64_crq = (u64 *)crq; 4249 long rc; 4250 4251 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4252 (unsigned long int)cpu_to_be64(u64_crq[0]), 4253 (unsigned long int)cpu_to_be64(u64_crq[1])); 4254 switch (gen_crq->first) { 4255 case IBMVNIC_CRQ_INIT_RSP: 4256 switch (gen_crq->cmd) { 4257 case IBMVNIC_CRQ_INIT: 4258 dev_info(dev, "Partner initialized\n"); 4259 adapter->from_passive_init = true; 4260 adapter->failover_pending = false; 4261 if (!completion_done(&adapter->init_done)) { 4262 complete(&adapter->init_done); 4263 adapter->init_done_rc = -EIO; 4264 } 4265 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4266 break; 4267 case IBMVNIC_CRQ_INIT_COMPLETE: 4268 dev_info(dev, "Partner initialization complete\n"); 4269 adapter->crq.active = true; 4270 send_version_xchg(adapter); 4271 break; 4272 default: 4273 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4274 } 4275 return; 4276 case IBMVNIC_CRQ_XPORT_EVENT: 4277 netif_carrier_off(netdev); 4278 adapter->crq.active = false; 4279 if (adapter->resetting) 4280 adapter->force_reset_recovery = true; 4281 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4282 dev_info(dev, "Migrated, re-enabling adapter\n"); 4283 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4284 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4285 dev_info(dev, "Backing device failover detected\n"); 4286 adapter->failover_pending = true; 4287 } else { 4288 /* The adapter lost the connection */ 4289 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4290 gen_crq->cmd); 4291 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4292 } 4293 return; 4294 case IBMVNIC_CRQ_CMD_RSP: 4295 break; 4296 default: 4297 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4298 gen_crq->first); 4299 return; 4300 } 4301 4302 switch (gen_crq->cmd) { 4303 case VERSION_EXCHANGE_RSP: 4304 rc = crq->version_exchange_rsp.rc.code; 4305 if (rc) { 4306 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4307 break; 4308 } 4309 dev_info(dev, "Partner protocol version is %d\n", 4310 crq->version_exchange_rsp.version); 4311 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4312 ibmvnic_version) 4313 ibmvnic_version = 4314 be16_to_cpu(crq->version_exchange_rsp.version); 4315 send_cap_queries(adapter); 4316 break; 4317 case QUERY_CAPABILITY_RSP: 4318 handle_query_cap_rsp(crq, adapter); 4319 break; 4320 case QUERY_MAP_RSP: 4321 handle_query_map_rsp(crq, adapter); 4322 break; 4323 case REQUEST_MAP_RSP: 4324 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4325 complete(&adapter->fw_done); 4326 break; 4327 case REQUEST_UNMAP_RSP: 4328 handle_request_unmap_rsp(crq, adapter); 4329 break; 4330 case REQUEST_CAPABILITY_RSP: 4331 handle_request_cap_rsp(crq, adapter); 4332 break; 4333 case LOGIN_RSP: 4334 netdev_dbg(netdev, "Got Login Response\n"); 4335 handle_login_rsp(crq, adapter); 4336 break; 4337 case LOGICAL_LINK_STATE_RSP: 4338 netdev_dbg(netdev, 4339 "Got Logical Link State Response, state: %d rc: %d\n", 4340 crq->logical_link_state_rsp.link_state, 4341 crq->logical_link_state_rsp.rc.code); 4342 adapter->logical_link_state = 4343 crq->logical_link_state_rsp.link_state; 4344 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4345 complete(&adapter->init_done); 4346 break; 4347 case LINK_STATE_INDICATION: 4348 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4349 adapter->phys_link_state = 4350 crq->link_state_indication.phys_link_state; 4351 adapter->logical_link_state = 4352 crq->link_state_indication.logical_link_state; 4353 break; 4354 case CHANGE_MAC_ADDR_RSP: 4355 netdev_dbg(netdev, "Got MAC address change Response\n"); 4356 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4357 break; 4358 case ERROR_INDICATION: 4359 netdev_dbg(netdev, "Got Error Indication\n"); 4360 handle_error_indication(crq, adapter); 4361 break; 4362 case REQUEST_STATISTICS_RSP: 4363 netdev_dbg(netdev, "Got Statistics Response\n"); 4364 complete(&adapter->stats_done); 4365 break; 4366 case QUERY_IP_OFFLOAD_RSP: 4367 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4368 handle_query_ip_offload_rsp(adapter); 4369 break; 4370 case MULTICAST_CTRL_RSP: 4371 netdev_dbg(netdev, "Got multicast control Response\n"); 4372 break; 4373 case CONTROL_IP_OFFLOAD_RSP: 4374 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4375 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4376 sizeof(adapter->ip_offload_ctrl), 4377 DMA_TO_DEVICE); 4378 complete(&adapter->init_done); 4379 break; 4380 case COLLECT_FW_TRACE_RSP: 4381 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4382 complete(&adapter->fw_done); 4383 break; 4384 case GET_VPD_SIZE_RSP: 4385 handle_vpd_size_rsp(crq, adapter); 4386 break; 4387 case GET_VPD_RSP: 4388 handle_vpd_rsp(crq, adapter); 4389 break; 4390 default: 4391 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4392 gen_crq->cmd); 4393 } 4394 } 4395 4396 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4397 { 4398 struct ibmvnic_adapter *adapter = instance; 4399 4400 tasklet_schedule(&adapter->tasklet); 4401 return IRQ_HANDLED; 4402 } 4403 4404 static void ibmvnic_tasklet(void *data) 4405 { 4406 struct ibmvnic_adapter *adapter = data; 4407 struct ibmvnic_crq_queue *queue = &adapter->crq; 4408 union ibmvnic_crq *crq; 4409 unsigned long flags; 4410 bool done = false; 4411 4412 spin_lock_irqsave(&queue->lock, flags); 4413 while (!done) { 4414 /* Pull all the valid messages off the CRQ */ 4415 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4416 ibmvnic_handle_crq(crq, adapter); 4417 crq->generic.first = 0; 4418 } 4419 4420 /* remain in tasklet until all 4421 * capabilities responses are received 4422 */ 4423 if (!adapter->wait_capability) 4424 done = true; 4425 } 4426 /* if capabilities CRQ's were sent in this tasklet, the following 4427 * tasklet must wait until all responses are received 4428 */ 4429 if (atomic_read(&adapter->running_cap_crqs) != 0) 4430 adapter->wait_capability = true; 4431 spin_unlock_irqrestore(&queue->lock, flags); 4432 } 4433 4434 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4435 { 4436 struct vio_dev *vdev = adapter->vdev; 4437 int rc; 4438 4439 do { 4440 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4441 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4442 4443 if (rc) 4444 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4445 4446 return rc; 4447 } 4448 4449 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4450 { 4451 struct ibmvnic_crq_queue *crq = &adapter->crq; 4452 struct device *dev = &adapter->vdev->dev; 4453 struct vio_dev *vdev = adapter->vdev; 4454 int rc; 4455 4456 /* Close the CRQ */ 4457 do { 4458 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4459 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4460 4461 /* Clean out the queue */ 4462 memset(crq->msgs, 0, PAGE_SIZE); 4463 crq->cur = 0; 4464 crq->active = false; 4465 4466 /* And re-open it again */ 4467 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4468 crq->msg_token, PAGE_SIZE); 4469 4470 if (rc == H_CLOSED) 4471 /* Adapter is good, but other end is not ready */ 4472 dev_warn(dev, "Partner adapter not ready\n"); 4473 else if (rc != 0) 4474 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4475 4476 return rc; 4477 } 4478 4479 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4480 { 4481 struct ibmvnic_crq_queue *crq = &adapter->crq; 4482 struct vio_dev *vdev = adapter->vdev; 4483 long rc; 4484 4485 if (!crq->msgs) 4486 return; 4487 4488 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4489 free_irq(vdev->irq, adapter); 4490 tasklet_kill(&adapter->tasklet); 4491 do { 4492 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4493 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4494 4495 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4496 DMA_BIDIRECTIONAL); 4497 free_page((unsigned long)crq->msgs); 4498 crq->msgs = NULL; 4499 crq->active = false; 4500 } 4501 4502 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4503 { 4504 struct ibmvnic_crq_queue *crq = &adapter->crq; 4505 struct device *dev = &adapter->vdev->dev; 4506 struct vio_dev *vdev = adapter->vdev; 4507 int rc, retrc = -ENOMEM; 4508 4509 if (crq->msgs) 4510 return 0; 4511 4512 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4513 /* Should we allocate more than one page? */ 4514 4515 if (!crq->msgs) 4516 return -ENOMEM; 4517 4518 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4519 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4520 DMA_BIDIRECTIONAL); 4521 if (dma_mapping_error(dev, crq->msg_token)) 4522 goto map_failed; 4523 4524 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4525 crq->msg_token, PAGE_SIZE); 4526 4527 if (rc == H_RESOURCE) 4528 /* maybe kexecing and resource is busy. try a reset */ 4529 rc = ibmvnic_reset_crq(adapter); 4530 retrc = rc; 4531 4532 if (rc == H_CLOSED) { 4533 dev_warn(dev, "Partner adapter not ready\n"); 4534 } else if (rc) { 4535 dev_warn(dev, "Error %d opening adapter\n", rc); 4536 goto reg_crq_failed; 4537 } 4538 4539 retrc = 0; 4540 4541 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4542 (unsigned long)adapter); 4543 4544 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4545 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 4546 adapter); 4547 if (rc) { 4548 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4549 vdev->irq, rc); 4550 goto req_irq_failed; 4551 } 4552 4553 rc = vio_enable_interrupts(vdev); 4554 if (rc) { 4555 dev_err(dev, "Error %d enabling interrupts\n", rc); 4556 goto req_irq_failed; 4557 } 4558 4559 crq->cur = 0; 4560 spin_lock_init(&crq->lock); 4561 4562 return retrc; 4563 4564 req_irq_failed: 4565 tasklet_kill(&adapter->tasklet); 4566 do { 4567 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4568 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4569 reg_crq_failed: 4570 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4571 map_failed: 4572 free_page((unsigned long)crq->msgs); 4573 crq->msgs = NULL; 4574 return retrc; 4575 } 4576 4577 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4578 { 4579 struct device *dev = &adapter->vdev->dev; 4580 unsigned long timeout = msecs_to_jiffies(30000); 4581 u64 old_num_rx_queues, old_num_tx_queues; 4582 int rc; 4583 4584 adapter->from_passive_init = false; 4585 4586 old_num_rx_queues = adapter->req_rx_queues; 4587 old_num_tx_queues = adapter->req_tx_queues; 4588 4589 init_completion(&adapter->init_done); 4590 adapter->init_done_rc = 0; 4591 ibmvnic_send_crq_init(adapter); 4592 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4593 dev_err(dev, "Initialization sequence timed out\n"); 4594 return -1; 4595 } 4596 4597 if (adapter->init_done_rc) { 4598 release_crq_queue(adapter); 4599 return adapter->init_done_rc; 4600 } 4601 4602 if (adapter->from_passive_init) { 4603 adapter->state = VNIC_OPEN; 4604 adapter->from_passive_init = false; 4605 return -1; 4606 } 4607 4608 if (adapter->resetting && !adapter->wait_for_reset && 4609 adapter->reset_reason != VNIC_RESET_MOBILITY) { 4610 if (adapter->req_rx_queues != old_num_rx_queues || 4611 adapter->req_tx_queues != old_num_tx_queues) { 4612 release_sub_crqs(adapter, 0); 4613 rc = init_sub_crqs(adapter); 4614 } else { 4615 rc = reset_sub_crq_queues(adapter); 4616 } 4617 } else { 4618 rc = init_sub_crqs(adapter); 4619 } 4620 4621 if (rc) { 4622 dev_err(dev, "Initialization of sub crqs failed\n"); 4623 release_crq_queue(adapter); 4624 return rc; 4625 } 4626 4627 rc = init_sub_crq_irqs(adapter); 4628 if (rc) { 4629 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4630 release_crq_queue(adapter); 4631 } 4632 4633 return rc; 4634 } 4635 4636 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4637 { 4638 struct device *dev = &adapter->vdev->dev; 4639 unsigned long timeout = msecs_to_jiffies(30000); 4640 int rc; 4641 4642 adapter->from_passive_init = false; 4643 4644 init_completion(&adapter->init_done); 4645 adapter->init_done_rc = 0; 4646 ibmvnic_send_crq_init(adapter); 4647 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4648 dev_err(dev, "Initialization sequence timed out\n"); 4649 return -1; 4650 } 4651 4652 if (adapter->init_done_rc) { 4653 release_crq_queue(adapter); 4654 return adapter->init_done_rc; 4655 } 4656 4657 if (adapter->from_passive_init) { 4658 adapter->state = VNIC_OPEN; 4659 adapter->from_passive_init = false; 4660 return -1; 4661 } 4662 4663 rc = init_sub_crqs(adapter); 4664 if (rc) { 4665 dev_err(dev, "Initialization of sub crqs failed\n"); 4666 release_crq_queue(adapter); 4667 return rc; 4668 } 4669 4670 rc = init_sub_crq_irqs(adapter); 4671 if (rc) { 4672 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4673 release_crq_queue(adapter); 4674 } 4675 4676 return rc; 4677 } 4678 4679 static struct device_attribute dev_attr_failover; 4680 4681 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4682 { 4683 struct ibmvnic_adapter *adapter; 4684 struct net_device *netdev; 4685 unsigned char *mac_addr_p; 4686 int rc; 4687 4688 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4689 dev->unit_address); 4690 4691 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4692 VETH_MAC_ADDR, NULL); 4693 if (!mac_addr_p) { 4694 dev_err(&dev->dev, 4695 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4696 __FILE__, __LINE__); 4697 return 0; 4698 } 4699 4700 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4701 IBMVNIC_MAX_QUEUES); 4702 if (!netdev) 4703 return -ENOMEM; 4704 4705 adapter = netdev_priv(netdev); 4706 adapter->state = VNIC_PROBING; 4707 dev_set_drvdata(&dev->dev, netdev); 4708 adapter->vdev = dev; 4709 adapter->netdev = netdev; 4710 4711 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4712 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4713 netdev->irq = dev->irq; 4714 netdev->netdev_ops = &ibmvnic_netdev_ops; 4715 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4716 SET_NETDEV_DEV(netdev, &dev->dev); 4717 4718 spin_lock_init(&adapter->stats_lock); 4719 4720 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4721 INIT_LIST_HEAD(&adapter->rwi_list); 4722 mutex_init(&adapter->reset_lock); 4723 mutex_init(&adapter->rwi_lock); 4724 adapter->resetting = false; 4725 4726 adapter->mac_change_pending = false; 4727 4728 do { 4729 rc = init_crq_queue(adapter); 4730 if (rc) { 4731 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 4732 rc); 4733 goto ibmvnic_init_fail; 4734 } 4735 4736 rc = ibmvnic_init(adapter); 4737 if (rc && rc != EAGAIN) 4738 goto ibmvnic_init_fail; 4739 } while (rc == EAGAIN); 4740 4741 rc = init_stats_buffers(adapter); 4742 if (rc) 4743 goto ibmvnic_init_fail; 4744 4745 rc = init_stats_token(adapter); 4746 if (rc) 4747 goto ibmvnic_stats_fail; 4748 4749 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4750 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4751 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4752 4753 rc = device_create_file(&dev->dev, &dev_attr_failover); 4754 if (rc) 4755 goto ibmvnic_dev_file_err; 4756 4757 netif_carrier_off(netdev); 4758 rc = register_netdev(netdev); 4759 if (rc) { 4760 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4761 goto ibmvnic_register_fail; 4762 } 4763 dev_info(&dev->dev, "ibmvnic registered\n"); 4764 4765 adapter->state = VNIC_PROBED; 4766 4767 adapter->wait_for_reset = false; 4768 4769 return 0; 4770 4771 ibmvnic_register_fail: 4772 device_remove_file(&dev->dev, &dev_attr_failover); 4773 4774 ibmvnic_dev_file_err: 4775 release_stats_token(adapter); 4776 4777 ibmvnic_stats_fail: 4778 release_stats_buffers(adapter); 4779 4780 ibmvnic_init_fail: 4781 release_sub_crqs(adapter, 1); 4782 release_crq_queue(adapter); 4783 free_netdev(netdev); 4784 4785 return rc; 4786 } 4787 4788 static int ibmvnic_remove(struct vio_dev *dev) 4789 { 4790 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4791 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4792 4793 adapter->state = VNIC_REMOVING; 4794 unregister_netdev(netdev); 4795 mutex_lock(&adapter->reset_lock); 4796 4797 release_resources(adapter); 4798 release_sub_crqs(adapter, 1); 4799 release_crq_queue(adapter); 4800 4801 release_stats_token(adapter); 4802 release_stats_buffers(adapter); 4803 4804 adapter->state = VNIC_REMOVED; 4805 4806 mutex_unlock(&adapter->reset_lock); 4807 device_remove_file(&dev->dev, &dev_attr_failover); 4808 free_netdev(netdev); 4809 dev_set_drvdata(&dev->dev, NULL); 4810 4811 return 0; 4812 } 4813 4814 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4815 const char *buf, size_t count) 4816 { 4817 struct net_device *netdev = dev_get_drvdata(dev); 4818 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4819 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4820 __be64 session_token; 4821 long rc; 4822 4823 if (!sysfs_streq(buf, "1")) 4824 return -EINVAL; 4825 4826 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4827 H_GET_SESSION_TOKEN, 0, 0, 0); 4828 if (rc) { 4829 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4830 rc); 4831 return -EINVAL; 4832 } 4833 4834 session_token = (__be64)retbuf[0]; 4835 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4836 be64_to_cpu(session_token)); 4837 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4838 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4839 if (rc) { 4840 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4841 rc); 4842 return -EINVAL; 4843 } 4844 4845 return count; 4846 } 4847 4848 static DEVICE_ATTR_WO(failover); 4849 4850 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4851 { 4852 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4853 struct ibmvnic_adapter *adapter; 4854 struct iommu_table *tbl; 4855 unsigned long ret = 0; 4856 int i; 4857 4858 tbl = get_iommu_table_base(&vdev->dev); 4859 4860 /* netdev inits at probe time along with the structures we need below*/ 4861 if (!netdev) 4862 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4863 4864 adapter = netdev_priv(netdev); 4865 4866 ret += PAGE_SIZE; /* the crq message queue */ 4867 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4868 4869 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4870 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4871 4872 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4873 i++) 4874 ret += adapter->rx_pool[i].size * 4875 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4876 4877 return ret; 4878 } 4879 4880 static int ibmvnic_resume(struct device *dev) 4881 { 4882 struct net_device *netdev = dev_get_drvdata(dev); 4883 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4884 4885 if (adapter->state != VNIC_OPEN) 4886 return 0; 4887 4888 tasklet_schedule(&adapter->tasklet); 4889 4890 return 0; 4891 } 4892 4893 static const struct vio_device_id ibmvnic_device_table[] = { 4894 {"network", "IBM,vnic"}, 4895 {"", "" } 4896 }; 4897 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 4898 4899 static const struct dev_pm_ops ibmvnic_pm_ops = { 4900 .resume = ibmvnic_resume 4901 }; 4902 4903 static struct vio_driver ibmvnic_driver = { 4904 .id_table = ibmvnic_device_table, 4905 .probe = ibmvnic_probe, 4906 .remove = ibmvnic_remove, 4907 .get_desired_dma = ibmvnic_get_desired_dma, 4908 .name = ibmvnic_driver_name, 4909 .pm = &ibmvnic_pm_ops, 4910 }; 4911 4912 /* module functions */ 4913 static int __init ibmvnic_module_init(void) 4914 { 4915 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 4916 IBMVNIC_DRIVER_VERSION); 4917 4918 return vio_register_driver(&ibmvnic_driver); 4919 } 4920 4921 static void __exit ibmvnic_module_exit(void) 4922 { 4923 vio_unregister_driver(&ibmvnic_driver); 4924 } 4925 4926 module_init(ibmvnic_module_init); 4927 module_exit(ibmvnic_module_exit); 4928