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[j].skb); 489 rx_pool->rx_buff[j].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 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 777 netif_napi_del(&adapter->napi[i]); 778 } 779 780 kfree(adapter->napi); 781 adapter->napi = NULL; 782 adapter->num_active_rx_napi = 0; 783 adapter->napi_enabled = false; 784 } 785 786 static int ibmvnic_login(struct net_device *netdev) 787 { 788 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 789 unsigned long timeout = msecs_to_jiffies(30000); 790 int retry_count = 0; 791 bool retry; 792 int rc; 793 794 do { 795 retry = false; 796 if (retry_count > IBMVNIC_MAX_QUEUES) { 797 netdev_warn(netdev, "Login attempts exceeded\n"); 798 return -1; 799 } 800 801 adapter->init_done_rc = 0; 802 reinit_completion(&adapter->init_done); 803 rc = send_login(adapter); 804 if (rc) { 805 netdev_warn(netdev, "Unable to login\n"); 806 return rc; 807 } 808 809 if (!wait_for_completion_timeout(&adapter->init_done, 810 timeout)) { 811 netdev_warn(netdev, "Login timed out\n"); 812 return -1; 813 } 814 815 if (adapter->init_done_rc == PARTIALSUCCESS) { 816 retry_count++; 817 release_sub_crqs(adapter, 1); 818 819 retry = true; 820 netdev_dbg(netdev, 821 "Received partial success, retrying...\n"); 822 adapter->init_done_rc = 0; 823 reinit_completion(&adapter->init_done); 824 send_cap_queries(adapter); 825 if (!wait_for_completion_timeout(&adapter->init_done, 826 timeout)) { 827 netdev_warn(netdev, 828 "Capabilities query timed out\n"); 829 return -1; 830 } 831 832 rc = init_sub_crqs(adapter); 833 if (rc) { 834 netdev_warn(netdev, 835 "SCRQ initialization failed\n"); 836 return -1; 837 } 838 839 rc = init_sub_crq_irqs(adapter); 840 if (rc) { 841 netdev_warn(netdev, 842 "SCRQ irq initialization failed\n"); 843 return -1; 844 } 845 } else if (adapter->init_done_rc) { 846 netdev_warn(netdev, "Adapter login failed\n"); 847 return -1; 848 } 849 } while (retry); 850 851 /* handle pending MAC address changes after successful login */ 852 if (adapter->mac_change_pending) { 853 __ibmvnic_set_mac(netdev, &adapter->desired.mac); 854 adapter->mac_change_pending = false; 855 } 856 857 return 0; 858 } 859 860 static void release_login_buffer(struct ibmvnic_adapter *adapter) 861 { 862 kfree(adapter->login_buf); 863 adapter->login_buf = NULL; 864 } 865 866 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 867 { 868 kfree(adapter->login_rsp_buf); 869 adapter->login_rsp_buf = NULL; 870 } 871 872 static void release_resources(struct ibmvnic_adapter *adapter) 873 { 874 release_vpd_data(adapter); 875 876 release_tx_pools(adapter); 877 release_rx_pools(adapter); 878 879 release_napi(adapter); 880 release_login_rsp_buffer(adapter); 881 } 882 883 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 884 { 885 struct net_device *netdev = adapter->netdev; 886 unsigned long timeout = msecs_to_jiffies(30000); 887 union ibmvnic_crq crq; 888 bool resend; 889 int rc; 890 891 netdev_dbg(netdev, "setting link state %d\n", link_state); 892 893 memset(&crq, 0, sizeof(crq)); 894 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 895 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 896 crq.logical_link_state.link_state = link_state; 897 898 do { 899 resend = false; 900 901 reinit_completion(&adapter->init_done); 902 rc = ibmvnic_send_crq(adapter, &crq); 903 if (rc) { 904 netdev_err(netdev, "Failed to set link state\n"); 905 return rc; 906 } 907 908 if (!wait_for_completion_timeout(&adapter->init_done, 909 timeout)) { 910 netdev_err(netdev, "timeout setting link state\n"); 911 return -1; 912 } 913 914 if (adapter->init_done_rc == 1) { 915 /* Partuial success, delay and re-send */ 916 mdelay(1000); 917 resend = true; 918 } else if (adapter->init_done_rc) { 919 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 920 adapter->init_done_rc); 921 return adapter->init_done_rc; 922 } 923 } while (resend); 924 925 return 0; 926 } 927 928 static int set_real_num_queues(struct net_device *netdev) 929 { 930 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 931 int rc; 932 933 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 934 adapter->req_tx_queues, adapter->req_rx_queues); 935 936 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 937 if (rc) { 938 netdev_err(netdev, "failed to set the number of tx queues\n"); 939 return rc; 940 } 941 942 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 943 if (rc) 944 netdev_err(netdev, "failed to set the number of rx queues\n"); 945 946 return rc; 947 } 948 949 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 950 { 951 struct device *dev = &adapter->vdev->dev; 952 union ibmvnic_crq crq; 953 int len = 0; 954 int rc; 955 956 if (adapter->vpd->buff) 957 len = adapter->vpd->len; 958 959 init_completion(&adapter->fw_done); 960 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 961 crq.get_vpd_size.cmd = GET_VPD_SIZE; 962 rc = ibmvnic_send_crq(adapter, &crq); 963 if (rc) 964 return rc; 965 wait_for_completion(&adapter->fw_done); 966 967 if (!adapter->vpd->len) 968 return -ENODATA; 969 970 if (!adapter->vpd->buff) 971 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 972 else if (adapter->vpd->len != len) 973 adapter->vpd->buff = 974 krealloc(adapter->vpd->buff, 975 adapter->vpd->len, GFP_KERNEL); 976 977 if (!adapter->vpd->buff) { 978 dev_err(dev, "Could allocate VPD buffer\n"); 979 return -ENOMEM; 980 } 981 982 adapter->vpd->dma_addr = 983 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 984 DMA_FROM_DEVICE); 985 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 986 dev_err(dev, "Could not map VPD buffer\n"); 987 kfree(adapter->vpd->buff); 988 adapter->vpd->buff = NULL; 989 return -ENOMEM; 990 } 991 992 reinit_completion(&adapter->fw_done); 993 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 994 crq.get_vpd.cmd = GET_VPD; 995 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 996 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 997 rc = ibmvnic_send_crq(adapter, &crq); 998 if (rc) { 999 kfree(adapter->vpd->buff); 1000 adapter->vpd->buff = NULL; 1001 return rc; 1002 } 1003 wait_for_completion(&adapter->fw_done); 1004 1005 return 0; 1006 } 1007 1008 static int init_resources(struct ibmvnic_adapter *adapter) 1009 { 1010 struct net_device *netdev = adapter->netdev; 1011 int rc; 1012 1013 rc = set_real_num_queues(netdev); 1014 if (rc) 1015 return rc; 1016 1017 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1018 if (!adapter->vpd) 1019 return -ENOMEM; 1020 1021 /* Vital Product Data (VPD) */ 1022 rc = ibmvnic_get_vpd(adapter); 1023 if (rc) { 1024 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1025 return rc; 1026 } 1027 1028 adapter->map_id = 1; 1029 1030 rc = init_napi(adapter); 1031 if (rc) 1032 return rc; 1033 1034 send_map_query(adapter); 1035 1036 rc = init_rx_pools(netdev); 1037 if (rc) 1038 return rc; 1039 1040 rc = init_tx_pools(netdev); 1041 return rc; 1042 } 1043 1044 static int __ibmvnic_open(struct net_device *netdev) 1045 { 1046 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1047 enum vnic_state prev_state = adapter->state; 1048 int i, rc; 1049 1050 adapter->state = VNIC_OPENING; 1051 replenish_pools(adapter); 1052 ibmvnic_napi_enable(adapter); 1053 1054 /* We're ready to receive frames, enable the sub-crq interrupts and 1055 * set the logical link state to up 1056 */ 1057 for (i = 0; i < adapter->req_rx_queues; i++) { 1058 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1059 if (prev_state == VNIC_CLOSED) 1060 enable_irq(adapter->rx_scrq[i]->irq); 1061 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1062 } 1063 1064 for (i = 0; i < adapter->req_tx_queues; i++) { 1065 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1066 if (prev_state == VNIC_CLOSED) 1067 enable_irq(adapter->tx_scrq[i]->irq); 1068 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1069 } 1070 1071 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1072 if (rc) { 1073 for (i = 0; i < adapter->req_rx_queues; i++) 1074 napi_disable(&adapter->napi[i]); 1075 release_resources(adapter); 1076 return rc; 1077 } 1078 1079 netif_tx_start_all_queues(netdev); 1080 1081 if (prev_state == VNIC_CLOSED) { 1082 for (i = 0; i < adapter->req_rx_queues; i++) 1083 napi_schedule(&adapter->napi[i]); 1084 } 1085 1086 adapter->state = VNIC_OPEN; 1087 return rc; 1088 } 1089 1090 static int ibmvnic_open(struct net_device *netdev) 1091 { 1092 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1093 int rc; 1094 1095 /* If device failover is pending, just set device state and return. 1096 * Device operation will be handled by reset routine. 1097 */ 1098 if (adapter->failover_pending) { 1099 adapter->state = VNIC_OPEN; 1100 return 0; 1101 } 1102 1103 if (adapter->state != VNIC_CLOSED) { 1104 rc = ibmvnic_login(netdev); 1105 if (rc) 1106 return rc; 1107 1108 rc = init_resources(adapter); 1109 if (rc) { 1110 netdev_err(netdev, "failed to initialize resources\n"); 1111 release_resources(adapter); 1112 return rc; 1113 } 1114 } 1115 1116 rc = __ibmvnic_open(netdev); 1117 netif_carrier_on(netdev); 1118 1119 return rc; 1120 } 1121 1122 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1123 { 1124 struct ibmvnic_rx_pool *rx_pool; 1125 struct ibmvnic_rx_buff *rx_buff; 1126 u64 rx_entries; 1127 int rx_scrqs; 1128 int i, j; 1129 1130 if (!adapter->rx_pool) 1131 return; 1132 1133 rx_scrqs = adapter->num_active_rx_pools; 1134 rx_entries = adapter->req_rx_add_entries_per_subcrq; 1135 1136 /* Free any remaining skbs in the rx buffer pools */ 1137 for (i = 0; i < rx_scrqs; i++) { 1138 rx_pool = &adapter->rx_pool[i]; 1139 if (!rx_pool || !rx_pool->rx_buff) 1140 continue; 1141 1142 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 1143 for (j = 0; j < rx_entries; j++) { 1144 rx_buff = &rx_pool->rx_buff[j]; 1145 if (rx_buff && rx_buff->skb) { 1146 dev_kfree_skb_any(rx_buff->skb); 1147 rx_buff->skb = NULL; 1148 } 1149 } 1150 } 1151 } 1152 1153 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 1154 struct ibmvnic_tx_pool *tx_pool) 1155 { 1156 struct ibmvnic_tx_buff *tx_buff; 1157 u64 tx_entries; 1158 int i; 1159 1160 if (!tx_pool || !tx_pool->tx_buff) 1161 return; 1162 1163 tx_entries = tx_pool->num_buffers; 1164 1165 for (i = 0; i < tx_entries; i++) { 1166 tx_buff = &tx_pool->tx_buff[i]; 1167 if (tx_buff && tx_buff->skb) { 1168 dev_kfree_skb_any(tx_buff->skb); 1169 tx_buff->skb = NULL; 1170 } 1171 } 1172 } 1173 1174 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 1175 { 1176 int tx_scrqs; 1177 int i; 1178 1179 if (!adapter->tx_pool || !adapter->tso_pool) 1180 return; 1181 1182 tx_scrqs = adapter->num_active_tx_pools; 1183 1184 /* Free any remaining skbs in the tx buffer pools */ 1185 for (i = 0; i < tx_scrqs; i++) { 1186 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 1187 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 1188 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 1189 } 1190 } 1191 1192 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 1193 { 1194 struct net_device *netdev = adapter->netdev; 1195 int i; 1196 1197 if (adapter->tx_scrq) { 1198 for (i = 0; i < adapter->req_tx_queues; i++) 1199 if (adapter->tx_scrq[i]->irq) { 1200 netdev_dbg(netdev, 1201 "Disabling tx_scrq[%d] irq\n", i); 1202 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 1203 disable_irq(adapter->tx_scrq[i]->irq); 1204 } 1205 } 1206 1207 if (adapter->rx_scrq) { 1208 for (i = 0; i < adapter->req_rx_queues; i++) { 1209 if (adapter->rx_scrq[i]->irq) { 1210 netdev_dbg(netdev, 1211 "Disabling rx_scrq[%d] irq\n", i); 1212 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 1213 disable_irq(adapter->rx_scrq[i]->irq); 1214 } 1215 } 1216 } 1217 } 1218 1219 static void ibmvnic_cleanup(struct net_device *netdev) 1220 { 1221 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1222 1223 /* ensure that transmissions are stopped if called by do_reset */ 1224 if (adapter->resetting) 1225 netif_tx_disable(netdev); 1226 else 1227 netif_tx_stop_all_queues(netdev); 1228 1229 ibmvnic_napi_disable(adapter); 1230 ibmvnic_disable_irqs(adapter); 1231 1232 clean_rx_pools(adapter); 1233 clean_tx_pools(adapter); 1234 } 1235 1236 static int __ibmvnic_close(struct net_device *netdev) 1237 { 1238 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1239 int rc = 0; 1240 1241 adapter->state = VNIC_CLOSING; 1242 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 1243 if (rc) 1244 return rc; 1245 adapter->state = VNIC_CLOSED; 1246 return 0; 1247 } 1248 1249 static int ibmvnic_close(struct net_device *netdev) 1250 { 1251 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1252 int rc; 1253 1254 /* If device failover is pending, just set device state and return. 1255 * Device operation will be handled by reset routine. 1256 */ 1257 if (adapter->failover_pending) { 1258 adapter->state = VNIC_CLOSED; 1259 return 0; 1260 } 1261 1262 rc = __ibmvnic_close(netdev); 1263 ibmvnic_cleanup(netdev); 1264 1265 return rc; 1266 } 1267 1268 /** 1269 * build_hdr_data - creates L2/L3/L4 header data buffer 1270 * @hdr_field - bitfield determining needed headers 1271 * @skb - socket buffer 1272 * @hdr_len - array of header lengths 1273 * @tot_len - total length of data 1274 * 1275 * Reads hdr_field to determine which headers are needed by firmware. 1276 * Builds a buffer containing these headers. Saves individual header 1277 * lengths and total buffer length to be used to build descriptors. 1278 */ 1279 static int build_hdr_data(u8 hdr_field, struct sk_buff *skb, 1280 int *hdr_len, u8 *hdr_data) 1281 { 1282 int len = 0; 1283 u8 *hdr; 1284 1285 if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb)) 1286 hdr_len[0] = sizeof(struct vlan_ethhdr); 1287 else 1288 hdr_len[0] = sizeof(struct ethhdr); 1289 1290 if (skb->protocol == htons(ETH_P_IP)) { 1291 hdr_len[1] = ip_hdr(skb)->ihl * 4; 1292 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 1293 hdr_len[2] = tcp_hdrlen(skb); 1294 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 1295 hdr_len[2] = sizeof(struct udphdr); 1296 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1297 hdr_len[1] = sizeof(struct ipv6hdr); 1298 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 1299 hdr_len[2] = tcp_hdrlen(skb); 1300 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 1301 hdr_len[2] = sizeof(struct udphdr); 1302 } else if (skb->protocol == htons(ETH_P_ARP)) { 1303 hdr_len[1] = arp_hdr_len(skb->dev); 1304 hdr_len[2] = 0; 1305 } 1306 1307 memset(hdr_data, 0, 120); 1308 if ((hdr_field >> 6) & 1) { 1309 hdr = skb_mac_header(skb); 1310 memcpy(hdr_data, hdr, hdr_len[0]); 1311 len += hdr_len[0]; 1312 } 1313 1314 if ((hdr_field >> 5) & 1) { 1315 hdr = skb_network_header(skb); 1316 memcpy(hdr_data + len, hdr, hdr_len[1]); 1317 len += hdr_len[1]; 1318 } 1319 1320 if ((hdr_field >> 4) & 1) { 1321 hdr = skb_transport_header(skb); 1322 memcpy(hdr_data + len, hdr, hdr_len[2]); 1323 len += hdr_len[2]; 1324 } 1325 return len; 1326 } 1327 1328 /** 1329 * create_hdr_descs - create header and header extension descriptors 1330 * @hdr_field - bitfield determining needed headers 1331 * @data - buffer containing header data 1332 * @len - length of data buffer 1333 * @hdr_len - array of individual header lengths 1334 * @scrq_arr - descriptor array 1335 * 1336 * Creates header and, if needed, header extension descriptors and 1337 * places them in a descriptor array, scrq_arr 1338 */ 1339 1340 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 1341 union sub_crq *scrq_arr) 1342 { 1343 union sub_crq hdr_desc; 1344 int tmp_len = len; 1345 int num_descs = 0; 1346 u8 *data, *cur; 1347 int tmp; 1348 1349 while (tmp_len > 0) { 1350 cur = hdr_data + len - tmp_len; 1351 1352 memset(&hdr_desc, 0, sizeof(hdr_desc)); 1353 if (cur != hdr_data) { 1354 data = hdr_desc.hdr_ext.data; 1355 tmp = tmp_len > 29 ? 29 : tmp_len; 1356 hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD; 1357 hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 1358 hdr_desc.hdr_ext.len = tmp; 1359 } else { 1360 data = hdr_desc.hdr.data; 1361 tmp = tmp_len > 24 ? 24 : tmp_len; 1362 hdr_desc.hdr.first = IBMVNIC_CRQ_CMD; 1363 hdr_desc.hdr.type = IBMVNIC_HDR_DESC; 1364 hdr_desc.hdr.len = tmp; 1365 hdr_desc.hdr.l2_len = (u8)hdr_len[0]; 1366 hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 1367 hdr_desc.hdr.l4_len = (u8)hdr_len[2]; 1368 hdr_desc.hdr.flag = hdr_field << 1; 1369 } 1370 memcpy(data, cur, tmp); 1371 tmp_len -= tmp; 1372 *scrq_arr = hdr_desc; 1373 scrq_arr++; 1374 num_descs++; 1375 } 1376 1377 return num_descs; 1378 } 1379 1380 /** 1381 * build_hdr_descs_arr - build a header descriptor array 1382 * @skb - socket buffer 1383 * @num_entries - number of descriptors to be sent 1384 * @subcrq - first TX descriptor 1385 * @hdr_field - bit field determining which headers will be sent 1386 * 1387 * This function will build a TX descriptor array with applicable 1388 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 1389 */ 1390 1391 static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff, 1392 int *num_entries, u8 hdr_field) 1393 { 1394 int hdr_len[3] = {0, 0, 0}; 1395 int tot_len; 1396 u8 *hdr_data = txbuff->hdr_data; 1397 1398 tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len, 1399 txbuff->hdr_data); 1400 *num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len, 1401 txbuff->indir_arr + 1); 1402 } 1403 1404 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 1405 struct net_device *netdev) 1406 { 1407 /* For some backing devices, mishandling of small packets 1408 * can result in a loss of connection or TX stall. Device 1409 * architects recommend that no packet should be smaller 1410 * than the minimum MTU value provided to the driver, so 1411 * pad any packets to that length 1412 */ 1413 if (skb->len < netdev->min_mtu) 1414 return skb_put_padto(skb, netdev->min_mtu); 1415 1416 return 0; 1417 } 1418 1419 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 1420 { 1421 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1422 int queue_num = skb_get_queue_mapping(skb); 1423 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 1424 struct device *dev = &adapter->vdev->dev; 1425 struct ibmvnic_tx_buff *tx_buff = NULL; 1426 struct ibmvnic_sub_crq_queue *tx_scrq; 1427 struct ibmvnic_tx_pool *tx_pool; 1428 unsigned int tx_send_failed = 0; 1429 unsigned int tx_map_failed = 0; 1430 unsigned int tx_dropped = 0; 1431 unsigned int tx_packets = 0; 1432 unsigned int tx_bytes = 0; 1433 dma_addr_t data_dma_addr; 1434 struct netdev_queue *txq; 1435 unsigned long lpar_rc; 1436 union sub_crq tx_crq; 1437 unsigned int offset; 1438 int num_entries = 1; 1439 unsigned char *dst; 1440 u64 *handle_array; 1441 int index = 0; 1442 u8 proto = 0; 1443 netdev_tx_t ret = NETDEV_TX_OK; 1444 1445 if (adapter->resetting) { 1446 if (!netif_subqueue_stopped(netdev, skb)) 1447 netif_stop_subqueue(netdev, queue_num); 1448 dev_kfree_skb_any(skb); 1449 1450 tx_send_failed++; 1451 tx_dropped++; 1452 ret = NETDEV_TX_OK; 1453 goto out; 1454 } 1455 1456 if (ibmvnic_xmit_workarounds(skb, netdev)) { 1457 tx_dropped++; 1458 tx_send_failed++; 1459 ret = NETDEV_TX_OK; 1460 goto out; 1461 } 1462 if (skb_is_gso(skb)) 1463 tx_pool = &adapter->tso_pool[queue_num]; 1464 else 1465 tx_pool = &adapter->tx_pool[queue_num]; 1466 1467 tx_scrq = adapter->tx_scrq[queue_num]; 1468 txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb)); 1469 handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 1470 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 1471 1472 index = tx_pool->free_map[tx_pool->consumer_index]; 1473 1474 if (index == IBMVNIC_INVALID_MAP) { 1475 dev_kfree_skb_any(skb); 1476 tx_send_failed++; 1477 tx_dropped++; 1478 ret = NETDEV_TX_OK; 1479 goto out; 1480 } 1481 1482 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 1483 1484 offset = index * tx_pool->buf_size; 1485 dst = tx_pool->long_term_buff.buff + offset; 1486 memset(dst, 0, tx_pool->buf_size); 1487 data_dma_addr = tx_pool->long_term_buff.addr + offset; 1488 1489 if (skb_shinfo(skb)->nr_frags) { 1490 int cur, i; 1491 1492 /* Copy the head */ 1493 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 1494 cur = skb_headlen(skb); 1495 1496 /* Copy the frags */ 1497 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1498 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 1499 1500 memcpy(dst + cur, 1501 page_address(skb_frag_page(frag)) + 1502 frag->page_offset, skb_frag_size(frag)); 1503 cur += skb_frag_size(frag); 1504 } 1505 } else { 1506 skb_copy_from_linear_data(skb, dst, skb->len); 1507 } 1508 1509 tx_pool->consumer_index = 1510 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 1511 1512 tx_buff = &tx_pool->tx_buff[index]; 1513 tx_buff->skb = skb; 1514 tx_buff->data_dma[0] = data_dma_addr; 1515 tx_buff->data_len[0] = skb->len; 1516 tx_buff->index = index; 1517 tx_buff->pool_index = queue_num; 1518 tx_buff->last_frag = true; 1519 1520 memset(&tx_crq, 0, sizeof(tx_crq)); 1521 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 1522 tx_crq.v1.type = IBMVNIC_TX_DESC; 1523 tx_crq.v1.n_crq_elem = 1; 1524 tx_crq.v1.n_sge = 1; 1525 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 1526 1527 if (skb_is_gso(skb)) 1528 tx_crq.v1.correlator = 1529 cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK); 1530 else 1531 tx_crq.v1.correlator = cpu_to_be32(index); 1532 tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id); 1533 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 1534 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 1535 1536 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 1537 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 1538 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 1539 } 1540 1541 if (skb->protocol == htons(ETH_P_IP)) { 1542 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 1543 proto = ip_hdr(skb)->protocol; 1544 } else if (skb->protocol == htons(ETH_P_IPV6)) { 1545 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 1546 proto = ipv6_hdr(skb)->nexthdr; 1547 } 1548 1549 if (proto == IPPROTO_TCP) 1550 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 1551 else if (proto == IPPROTO_UDP) 1552 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 1553 1554 if (skb->ip_summed == CHECKSUM_PARTIAL) { 1555 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 1556 hdrs += 2; 1557 } 1558 if (skb_is_gso(skb)) { 1559 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 1560 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 1561 hdrs += 2; 1562 } 1563 /* determine if l2/3/4 headers are sent to firmware */ 1564 if ((*hdrs >> 7) & 1) { 1565 build_hdr_descs_arr(tx_buff, &num_entries, *hdrs); 1566 tx_crq.v1.n_crq_elem = num_entries; 1567 tx_buff->num_entries = num_entries; 1568 tx_buff->indir_arr[0] = tx_crq; 1569 tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr, 1570 sizeof(tx_buff->indir_arr), 1571 DMA_TO_DEVICE); 1572 if (dma_mapping_error(dev, tx_buff->indir_dma)) { 1573 dev_kfree_skb_any(skb); 1574 tx_buff->skb = NULL; 1575 if (!firmware_has_feature(FW_FEATURE_CMO)) 1576 dev_err(dev, "tx: unable to map descriptor array\n"); 1577 tx_map_failed++; 1578 tx_dropped++; 1579 ret = NETDEV_TX_OK; 1580 goto tx_err_out; 1581 } 1582 lpar_rc = send_subcrq_indirect(adapter, handle_array[queue_num], 1583 (u64)tx_buff->indir_dma, 1584 (u64)num_entries); 1585 } else { 1586 tx_buff->num_entries = num_entries; 1587 lpar_rc = send_subcrq(adapter, handle_array[queue_num], 1588 &tx_crq); 1589 } 1590 if (lpar_rc != H_SUCCESS) { 1591 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 1592 dev_err_ratelimited(dev, "tx: send failed\n"); 1593 dev_kfree_skb_any(skb); 1594 tx_buff->skb = NULL; 1595 1596 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 1597 /* Disable TX and report carrier off if queue is closed 1598 * or pending failover. 1599 * Firmware guarantees that a signal will be sent to the 1600 * driver, triggering a reset or some other action. 1601 */ 1602 netif_tx_stop_all_queues(netdev); 1603 netif_carrier_off(netdev); 1604 } 1605 1606 tx_send_failed++; 1607 tx_dropped++; 1608 ret = NETDEV_TX_OK; 1609 goto tx_err_out; 1610 } 1611 1612 if (atomic_add_return(num_entries, &tx_scrq->used) 1613 >= adapter->req_tx_entries_per_subcrq) { 1614 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 1615 netif_stop_subqueue(netdev, queue_num); 1616 } 1617 1618 tx_packets++; 1619 tx_bytes += skb->len; 1620 txq->trans_start = jiffies; 1621 ret = NETDEV_TX_OK; 1622 goto out; 1623 1624 tx_err_out: 1625 /* roll back consumer index and map array*/ 1626 if (tx_pool->consumer_index == 0) 1627 tx_pool->consumer_index = 1628 tx_pool->num_buffers - 1; 1629 else 1630 tx_pool->consumer_index--; 1631 tx_pool->free_map[tx_pool->consumer_index] = index; 1632 out: 1633 netdev->stats.tx_dropped += tx_dropped; 1634 netdev->stats.tx_bytes += tx_bytes; 1635 netdev->stats.tx_packets += tx_packets; 1636 adapter->tx_send_failed += tx_send_failed; 1637 adapter->tx_map_failed += tx_map_failed; 1638 adapter->tx_stats_buffers[queue_num].packets += tx_packets; 1639 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 1640 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 1641 1642 return ret; 1643 } 1644 1645 static void ibmvnic_set_multi(struct net_device *netdev) 1646 { 1647 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1648 struct netdev_hw_addr *ha; 1649 union ibmvnic_crq crq; 1650 1651 memset(&crq, 0, sizeof(crq)); 1652 crq.request_capability.first = IBMVNIC_CRQ_CMD; 1653 crq.request_capability.cmd = REQUEST_CAPABILITY; 1654 1655 if (netdev->flags & IFF_PROMISC) { 1656 if (!adapter->promisc_supported) 1657 return; 1658 } else { 1659 if (netdev->flags & IFF_ALLMULTI) { 1660 /* Accept all multicast */ 1661 memset(&crq, 0, sizeof(crq)); 1662 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1663 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1664 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 1665 ibmvnic_send_crq(adapter, &crq); 1666 } else if (netdev_mc_empty(netdev)) { 1667 /* Reject all multicast */ 1668 memset(&crq, 0, sizeof(crq)); 1669 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1670 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1671 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 1672 ibmvnic_send_crq(adapter, &crq); 1673 } else { 1674 /* Accept one or more multicast(s) */ 1675 netdev_for_each_mc_addr(ha, netdev) { 1676 memset(&crq, 0, sizeof(crq)); 1677 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 1678 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 1679 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 1680 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 1681 ha->addr); 1682 ibmvnic_send_crq(adapter, &crq); 1683 } 1684 } 1685 } 1686 } 1687 1688 static int __ibmvnic_set_mac(struct net_device *netdev, struct sockaddr *p) 1689 { 1690 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1691 struct sockaddr *addr = p; 1692 union ibmvnic_crq crq; 1693 int rc; 1694 1695 if (!is_valid_ether_addr(addr->sa_data)) 1696 return -EADDRNOTAVAIL; 1697 1698 memset(&crq, 0, sizeof(crq)); 1699 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 1700 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 1701 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], addr->sa_data); 1702 1703 init_completion(&adapter->fw_done); 1704 rc = ibmvnic_send_crq(adapter, &crq); 1705 if (rc) 1706 return rc; 1707 wait_for_completion(&adapter->fw_done); 1708 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 1709 return adapter->fw_done_rc ? -EIO : 0; 1710 } 1711 1712 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 1713 { 1714 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1715 struct sockaddr *addr = p; 1716 int rc; 1717 1718 if (adapter->state == VNIC_PROBED) { 1719 memcpy(&adapter->desired.mac, addr, sizeof(struct sockaddr)); 1720 adapter->mac_change_pending = true; 1721 return 0; 1722 } 1723 1724 rc = __ibmvnic_set_mac(netdev, addr); 1725 1726 return rc; 1727 } 1728 1729 /** 1730 * do_reset returns zero if we are able to keep processing reset events, or 1731 * non-zero if we hit a fatal error and must halt. 1732 */ 1733 static int do_reset(struct ibmvnic_adapter *adapter, 1734 struct ibmvnic_rwi *rwi, u32 reset_state) 1735 { 1736 u64 old_num_rx_queues, old_num_tx_queues; 1737 u64 old_num_rx_slots, old_num_tx_slots; 1738 struct net_device *netdev = adapter->netdev; 1739 int i, rc; 1740 1741 netdev_dbg(adapter->netdev, "Re-setting driver (%d)\n", 1742 rwi->reset_reason); 1743 1744 netif_carrier_off(netdev); 1745 adapter->reset_reason = rwi->reset_reason; 1746 1747 old_num_rx_queues = adapter->req_rx_queues; 1748 old_num_tx_queues = adapter->req_tx_queues; 1749 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 1750 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 1751 1752 ibmvnic_cleanup(netdev); 1753 1754 if (adapter->reset_reason != VNIC_RESET_MOBILITY && 1755 adapter->reset_reason != VNIC_RESET_FAILOVER) { 1756 rc = __ibmvnic_close(netdev); 1757 if (rc) 1758 return rc; 1759 } 1760 1761 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1762 adapter->wait_for_reset) { 1763 release_resources(adapter); 1764 release_sub_crqs(adapter, 1); 1765 release_crq_queue(adapter); 1766 } 1767 1768 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 1769 /* remove the closed state so when we call open it appears 1770 * we are coming from the probed state. 1771 */ 1772 adapter->state = VNIC_PROBED; 1773 1774 if (adapter->wait_for_reset) { 1775 rc = init_crq_queue(adapter); 1776 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 1777 rc = ibmvnic_reenable_crq_queue(adapter); 1778 release_sub_crqs(adapter, 1); 1779 } else { 1780 rc = ibmvnic_reset_crq(adapter); 1781 if (!rc) 1782 rc = vio_enable_interrupts(adapter->vdev); 1783 } 1784 1785 if (rc) { 1786 netdev_err(adapter->netdev, 1787 "Couldn't initialize crq. rc=%d\n", rc); 1788 return rc; 1789 } 1790 1791 rc = ibmvnic_reset_init(adapter); 1792 if (rc) 1793 return IBMVNIC_INIT_FAILED; 1794 1795 /* If the adapter was in PROBE state prior to the reset, 1796 * exit here. 1797 */ 1798 if (reset_state == VNIC_PROBED) 1799 return 0; 1800 1801 rc = ibmvnic_login(netdev); 1802 if (rc) { 1803 adapter->state = reset_state; 1804 return rc; 1805 } 1806 1807 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM || 1808 adapter->wait_for_reset) { 1809 rc = init_resources(adapter); 1810 if (rc) 1811 return rc; 1812 } else if (adapter->req_rx_queues != old_num_rx_queues || 1813 adapter->req_tx_queues != old_num_tx_queues || 1814 adapter->req_rx_add_entries_per_subcrq != 1815 old_num_rx_slots || 1816 adapter->req_tx_entries_per_subcrq != 1817 old_num_tx_slots) { 1818 release_rx_pools(adapter); 1819 release_tx_pools(adapter); 1820 release_napi(adapter); 1821 release_vpd_data(adapter); 1822 1823 rc = init_resources(adapter); 1824 if (rc) 1825 return rc; 1826 1827 } else { 1828 rc = reset_tx_pools(adapter); 1829 if (rc) 1830 return rc; 1831 1832 rc = reset_rx_pools(adapter); 1833 if (rc) 1834 return rc; 1835 } 1836 ibmvnic_disable_irqs(adapter); 1837 } 1838 adapter->state = VNIC_CLOSED; 1839 1840 if (reset_state == VNIC_CLOSED) 1841 return 0; 1842 1843 rc = __ibmvnic_open(netdev); 1844 if (rc) { 1845 if (list_empty(&adapter->rwi_list)) 1846 adapter->state = VNIC_CLOSED; 1847 else 1848 adapter->state = reset_state; 1849 1850 return 0; 1851 } 1852 1853 /* kick napi */ 1854 for (i = 0; i < adapter->req_rx_queues; i++) 1855 napi_schedule(&adapter->napi[i]); 1856 1857 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 1858 adapter->reset_reason != VNIC_RESET_CHANGE_PARAM) 1859 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev); 1860 1861 netif_carrier_on(netdev); 1862 1863 return 0; 1864 } 1865 1866 static int do_hard_reset(struct ibmvnic_adapter *adapter, 1867 struct ibmvnic_rwi *rwi, u32 reset_state) 1868 { 1869 struct net_device *netdev = adapter->netdev; 1870 int rc; 1871 1872 netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n", 1873 rwi->reset_reason); 1874 1875 netif_carrier_off(netdev); 1876 adapter->reset_reason = rwi->reset_reason; 1877 1878 ibmvnic_cleanup(netdev); 1879 release_resources(adapter); 1880 release_sub_crqs(adapter, 0); 1881 release_crq_queue(adapter); 1882 1883 /* remove the closed state so when we call open it appears 1884 * we are coming from the probed state. 1885 */ 1886 adapter->state = VNIC_PROBED; 1887 1888 rc = init_crq_queue(adapter); 1889 if (rc) { 1890 netdev_err(adapter->netdev, 1891 "Couldn't initialize crq. rc=%d\n", rc); 1892 return rc; 1893 } 1894 1895 rc = ibmvnic_init(adapter); 1896 if (rc) 1897 return rc; 1898 1899 /* If the adapter was in PROBE state prior to the reset, 1900 * exit here. 1901 */ 1902 if (reset_state == VNIC_PROBED) 1903 return 0; 1904 1905 rc = ibmvnic_login(netdev); 1906 if (rc) { 1907 adapter->state = VNIC_PROBED; 1908 return 0; 1909 } 1910 1911 rc = init_resources(adapter); 1912 if (rc) 1913 return rc; 1914 1915 ibmvnic_disable_irqs(adapter); 1916 adapter->state = VNIC_CLOSED; 1917 1918 if (reset_state == VNIC_CLOSED) 1919 return 0; 1920 1921 rc = __ibmvnic_open(netdev); 1922 if (rc) { 1923 if (list_empty(&adapter->rwi_list)) 1924 adapter->state = VNIC_CLOSED; 1925 else 1926 adapter->state = reset_state; 1927 1928 return 0; 1929 } 1930 1931 netif_carrier_on(netdev); 1932 1933 return 0; 1934 } 1935 1936 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 1937 { 1938 struct ibmvnic_rwi *rwi; 1939 unsigned long flags; 1940 1941 spin_lock_irqsave(&adapter->rwi_lock, flags); 1942 1943 if (!list_empty(&adapter->rwi_list)) { 1944 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 1945 list); 1946 list_del(&rwi->list); 1947 } else { 1948 rwi = NULL; 1949 } 1950 1951 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 1952 return rwi; 1953 } 1954 1955 static void free_all_rwi(struct ibmvnic_adapter *adapter) 1956 { 1957 struct ibmvnic_rwi *rwi; 1958 1959 rwi = get_next_rwi(adapter); 1960 while (rwi) { 1961 kfree(rwi); 1962 rwi = get_next_rwi(adapter); 1963 } 1964 } 1965 1966 static void __ibmvnic_reset(struct work_struct *work) 1967 { 1968 struct ibmvnic_rwi *rwi; 1969 struct ibmvnic_adapter *adapter; 1970 struct net_device *netdev; 1971 bool we_lock_rtnl = false; 1972 u32 reset_state; 1973 int rc = 0; 1974 1975 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 1976 netdev = adapter->netdev; 1977 1978 /* netif_set_real_num_xx_queues needs to take rtnl lock here 1979 * unless wait_for_reset is set, in which case the rtnl lock 1980 * has already been taken before initializing the reset 1981 */ 1982 if (!adapter->wait_for_reset) { 1983 rtnl_lock(); 1984 we_lock_rtnl = true; 1985 } 1986 reset_state = adapter->state; 1987 1988 rwi = get_next_rwi(adapter); 1989 while (rwi) { 1990 if (adapter->force_reset_recovery) { 1991 adapter->force_reset_recovery = false; 1992 rc = do_hard_reset(adapter, rwi, reset_state); 1993 } else { 1994 rc = do_reset(adapter, rwi, reset_state); 1995 } 1996 kfree(rwi); 1997 if (rc && rc != IBMVNIC_INIT_FAILED && 1998 !adapter->force_reset_recovery) 1999 break; 2000 2001 rwi = get_next_rwi(adapter); 2002 } 2003 2004 if (adapter->wait_for_reset) { 2005 adapter->wait_for_reset = false; 2006 adapter->reset_done_rc = rc; 2007 complete(&adapter->reset_done); 2008 } 2009 2010 if (rc) { 2011 netdev_dbg(adapter->netdev, "Reset failed\n"); 2012 free_all_rwi(adapter); 2013 } 2014 2015 adapter->resetting = false; 2016 if (we_lock_rtnl) 2017 rtnl_unlock(); 2018 } 2019 2020 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 2021 enum ibmvnic_reset_reason reason) 2022 { 2023 struct list_head *entry, *tmp_entry; 2024 struct ibmvnic_rwi *rwi, *tmp; 2025 struct net_device *netdev = adapter->netdev; 2026 unsigned long flags; 2027 int ret; 2028 2029 if (adapter->state == VNIC_REMOVING || 2030 adapter->state == VNIC_REMOVED || 2031 adapter->failover_pending) { 2032 ret = EBUSY; 2033 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 2034 goto err; 2035 } 2036 2037 if (adapter->state == VNIC_PROBING) { 2038 netdev_warn(netdev, "Adapter reset during probe\n"); 2039 ret = adapter->init_done_rc = EAGAIN; 2040 goto err; 2041 } 2042 2043 spin_lock_irqsave(&adapter->rwi_lock, flags); 2044 2045 list_for_each(entry, &adapter->rwi_list) { 2046 tmp = list_entry(entry, struct ibmvnic_rwi, list); 2047 if (tmp->reset_reason == reason) { 2048 netdev_dbg(netdev, "Skipping matching reset\n"); 2049 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2050 ret = EBUSY; 2051 goto err; 2052 } 2053 } 2054 2055 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 2056 if (!rwi) { 2057 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2058 ibmvnic_close(netdev); 2059 ret = ENOMEM; 2060 goto err; 2061 } 2062 /* if we just received a transport event, 2063 * flush reset queue and process this reset 2064 */ 2065 if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) { 2066 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) 2067 list_del(entry); 2068 } 2069 rwi->reset_reason = reason; 2070 list_add_tail(&rwi->list, &adapter->rwi_list); 2071 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 2072 adapter->resetting = true; 2073 netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason); 2074 schedule_work(&adapter->ibmvnic_reset); 2075 2076 return 0; 2077 err: 2078 if (adapter->wait_for_reset) 2079 adapter->wait_for_reset = false; 2080 return -ret; 2081 } 2082 2083 static void ibmvnic_tx_timeout(struct net_device *dev) 2084 { 2085 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2086 2087 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 2088 } 2089 2090 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 2091 struct ibmvnic_rx_buff *rx_buff) 2092 { 2093 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 2094 2095 rx_buff->skb = NULL; 2096 2097 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 2098 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 2099 2100 atomic_dec(&pool->available); 2101 } 2102 2103 static int ibmvnic_poll(struct napi_struct *napi, int budget) 2104 { 2105 struct net_device *netdev = napi->dev; 2106 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2107 int scrq_num = (int)(napi - adapter->napi); 2108 int frames_processed = 0; 2109 2110 restart_poll: 2111 while (frames_processed < budget) { 2112 struct sk_buff *skb; 2113 struct ibmvnic_rx_buff *rx_buff; 2114 union sub_crq *next; 2115 u32 length; 2116 u16 offset; 2117 u8 flags = 0; 2118 2119 if (unlikely(adapter->resetting && 2120 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 2121 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2122 napi_complete_done(napi, frames_processed); 2123 return frames_processed; 2124 } 2125 2126 if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num])) 2127 break; 2128 next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]); 2129 rx_buff = 2130 (struct ibmvnic_rx_buff *)be64_to_cpu(next-> 2131 rx_comp.correlator); 2132 /* do error checking */ 2133 if (next->rx_comp.rc) { 2134 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 2135 be16_to_cpu(next->rx_comp.rc)); 2136 /* free the entry */ 2137 next->rx_comp.first = 0; 2138 dev_kfree_skb_any(rx_buff->skb); 2139 remove_buff_from_pool(adapter, rx_buff); 2140 continue; 2141 } else if (!rx_buff->skb) { 2142 /* free the entry */ 2143 next->rx_comp.first = 0; 2144 remove_buff_from_pool(adapter, rx_buff); 2145 continue; 2146 } 2147 2148 length = be32_to_cpu(next->rx_comp.len); 2149 offset = be16_to_cpu(next->rx_comp.off_frame_data); 2150 flags = next->rx_comp.flags; 2151 skb = rx_buff->skb; 2152 skb_copy_to_linear_data(skb, rx_buff->data + offset, 2153 length); 2154 2155 /* VLAN Header has been stripped by the system firmware and 2156 * needs to be inserted by the driver 2157 */ 2158 if (adapter->rx_vlan_header_insertion && 2159 (flags & IBMVNIC_VLAN_STRIPPED)) 2160 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 2161 ntohs(next->rx_comp.vlan_tci)); 2162 2163 /* free the entry */ 2164 next->rx_comp.first = 0; 2165 remove_buff_from_pool(adapter, rx_buff); 2166 2167 skb_put(skb, length); 2168 skb->protocol = eth_type_trans(skb, netdev); 2169 skb_record_rx_queue(skb, scrq_num); 2170 2171 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 2172 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 2173 skb->ip_summed = CHECKSUM_UNNECESSARY; 2174 } 2175 2176 length = skb->len; 2177 napi_gro_receive(napi, skb); /* send it up */ 2178 netdev->stats.rx_packets++; 2179 netdev->stats.rx_bytes += length; 2180 adapter->rx_stats_buffers[scrq_num].packets++; 2181 adapter->rx_stats_buffers[scrq_num].bytes += length; 2182 frames_processed++; 2183 } 2184 2185 if (adapter->state != VNIC_CLOSING) 2186 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 2187 2188 if (frames_processed < budget) { 2189 enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2190 napi_complete_done(napi, frames_processed); 2191 if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) && 2192 napi_reschedule(napi)) { 2193 disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]); 2194 goto restart_poll; 2195 } 2196 } 2197 return frames_processed; 2198 } 2199 2200 static int wait_for_reset(struct ibmvnic_adapter *adapter) 2201 { 2202 int rc, ret; 2203 2204 adapter->fallback.mtu = adapter->req_mtu; 2205 adapter->fallback.rx_queues = adapter->req_rx_queues; 2206 adapter->fallback.tx_queues = adapter->req_tx_queues; 2207 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 2208 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 2209 2210 init_completion(&adapter->reset_done); 2211 adapter->wait_for_reset = true; 2212 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2213 if (rc) 2214 return rc; 2215 wait_for_completion(&adapter->reset_done); 2216 2217 ret = 0; 2218 if (adapter->reset_done_rc) { 2219 ret = -EIO; 2220 adapter->desired.mtu = adapter->fallback.mtu; 2221 adapter->desired.rx_queues = adapter->fallback.rx_queues; 2222 adapter->desired.tx_queues = adapter->fallback.tx_queues; 2223 adapter->desired.rx_entries = adapter->fallback.rx_entries; 2224 adapter->desired.tx_entries = adapter->fallback.tx_entries; 2225 2226 init_completion(&adapter->reset_done); 2227 adapter->wait_for_reset = true; 2228 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 2229 if (rc) 2230 return ret; 2231 wait_for_completion(&adapter->reset_done); 2232 } 2233 adapter->wait_for_reset = false; 2234 2235 return ret; 2236 } 2237 2238 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 2239 { 2240 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2241 2242 adapter->desired.mtu = new_mtu + ETH_HLEN; 2243 2244 return wait_for_reset(adapter); 2245 } 2246 2247 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 2248 struct net_device *dev, 2249 netdev_features_t features) 2250 { 2251 /* Some backing hardware adapters can not 2252 * handle packets with a MSS less than 224 2253 * or with only one segment. 2254 */ 2255 if (skb_is_gso(skb)) { 2256 if (skb_shinfo(skb)->gso_size < 224 || 2257 skb_shinfo(skb)->gso_segs == 1) 2258 features &= ~NETIF_F_GSO_MASK; 2259 } 2260 2261 return features; 2262 } 2263 2264 static const struct net_device_ops ibmvnic_netdev_ops = { 2265 .ndo_open = ibmvnic_open, 2266 .ndo_stop = ibmvnic_close, 2267 .ndo_start_xmit = ibmvnic_xmit, 2268 .ndo_set_rx_mode = ibmvnic_set_multi, 2269 .ndo_set_mac_address = ibmvnic_set_mac, 2270 .ndo_validate_addr = eth_validate_addr, 2271 .ndo_tx_timeout = ibmvnic_tx_timeout, 2272 .ndo_change_mtu = ibmvnic_change_mtu, 2273 .ndo_features_check = ibmvnic_features_check, 2274 }; 2275 2276 /* ethtool functions */ 2277 2278 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 2279 struct ethtool_link_ksettings *cmd) 2280 { 2281 u32 supported, advertising; 2282 2283 supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | 2284 SUPPORTED_FIBRE); 2285 advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | 2286 ADVERTISED_FIBRE); 2287 cmd->base.speed = SPEED_1000; 2288 cmd->base.duplex = DUPLEX_FULL; 2289 cmd->base.port = PORT_FIBRE; 2290 cmd->base.phy_address = 0; 2291 cmd->base.autoneg = AUTONEG_ENABLE; 2292 2293 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported, 2294 supported); 2295 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising, 2296 advertising); 2297 2298 return 0; 2299 } 2300 2301 static void ibmvnic_get_drvinfo(struct net_device *netdev, 2302 struct ethtool_drvinfo *info) 2303 { 2304 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2305 2306 strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 2307 strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 2308 strlcpy(info->fw_version, adapter->fw_version, 2309 sizeof(info->fw_version)); 2310 } 2311 2312 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 2313 { 2314 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2315 2316 return adapter->msg_enable; 2317 } 2318 2319 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 2320 { 2321 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2322 2323 adapter->msg_enable = data; 2324 } 2325 2326 static u32 ibmvnic_get_link(struct net_device *netdev) 2327 { 2328 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2329 2330 /* Don't need to send a query because we request a logical link up at 2331 * init and then we wait for link state indications 2332 */ 2333 return adapter->logical_link_state; 2334 } 2335 2336 static void ibmvnic_get_ringparam(struct net_device *netdev, 2337 struct ethtool_ringparam *ring) 2338 { 2339 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2340 2341 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2342 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 2343 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 2344 } else { 2345 ring->rx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2346 ring->tx_max_pending = IBMVNIC_MAX_QUEUE_SZ; 2347 } 2348 ring->rx_mini_max_pending = 0; 2349 ring->rx_jumbo_max_pending = 0; 2350 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 2351 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 2352 ring->rx_mini_pending = 0; 2353 ring->rx_jumbo_pending = 0; 2354 } 2355 2356 static int ibmvnic_set_ringparam(struct net_device *netdev, 2357 struct ethtool_ringparam *ring) 2358 { 2359 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2360 int ret; 2361 2362 ret = 0; 2363 adapter->desired.rx_entries = ring->rx_pending; 2364 adapter->desired.tx_entries = ring->tx_pending; 2365 2366 ret = wait_for_reset(adapter); 2367 2368 if (!ret && 2369 (adapter->req_rx_add_entries_per_subcrq != ring->rx_pending || 2370 adapter->req_tx_entries_per_subcrq != ring->tx_pending)) 2371 netdev_info(netdev, 2372 "Could not match full ringsize request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2373 ring->rx_pending, ring->tx_pending, 2374 adapter->req_rx_add_entries_per_subcrq, 2375 adapter->req_tx_entries_per_subcrq); 2376 return ret; 2377 } 2378 2379 static void ibmvnic_get_channels(struct net_device *netdev, 2380 struct ethtool_channels *channels) 2381 { 2382 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2383 2384 if (adapter->priv_flags & IBMVNIC_USE_SERVER_MAXES) { 2385 channels->max_rx = adapter->max_rx_queues; 2386 channels->max_tx = adapter->max_tx_queues; 2387 } else { 2388 channels->max_rx = IBMVNIC_MAX_QUEUES; 2389 channels->max_tx = IBMVNIC_MAX_QUEUES; 2390 } 2391 2392 channels->max_other = 0; 2393 channels->max_combined = 0; 2394 channels->rx_count = adapter->req_rx_queues; 2395 channels->tx_count = adapter->req_tx_queues; 2396 channels->other_count = 0; 2397 channels->combined_count = 0; 2398 } 2399 2400 static int ibmvnic_set_channels(struct net_device *netdev, 2401 struct ethtool_channels *channels) 2402 { 2403 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2404 int ret; 2405 2406 ret = 0; 2407 adapter->desired.rx_queues = channels->rx_count; 2408 adapter->desired.tx_queues = channels->tx_count; 2409 2410 ret = wait_for_reset(adapter); 2411 2412 if (!ret && 2413 (adapter->req_rx_queues != channels->rx_count || 2414 adapter->req_tx_queues != channels->tx_count)) 2415 netdev_info(netdev, 2416 "Could not match full channels request. Requested: RX %d, TX %d; Allowed: RX %llu, TX %llu\n", 2417 channels->rx_count, channels->tx_count, 2418 adapter->req_rx_queues, adapter->req_tx_queues); 2419 return ret; 2420 2421 } 2422 2423 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 2424 { 2425 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2426 int i; 2427 2428 switch (stringset) { 2429 case ETH_SS_STATS: 2430 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); 2431 i++, data += ETH_GSTRING_LEN) 2432 memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN); 2433 2434 for (i = 0; i < adapter->req_tx_queues; i++) { 2435 snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i); 2436 data += ETH_GSTRING_LEN; 2437 2438 snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i); 2439 data += ETH_GSTRING_LEN; 2440 2441 snprintf(data, ETH_GSTRING_LEN, 2442 "tx%d_dropped_packets", i); 2443 data += ETH_GSTRING_LEN; 2444 } 2445 2446 for (i = 0; i < adapter->req_rx_queues; i++) { 2447 snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i); 2448 data += ETH_GSTRING_LEN; 2449 2450 snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i); 2451 data += ETH_GSTRING_LEN; 2452 2453 snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i); 2454 data += ETH_GSTRING_LEN; 2455 } 2456 break; 2457 2458 case ETH_SS_PRIV_FLAGS: 2459 for (i = 0; i < ARRAY_SIZE(ibmvnic_priv_flags); i++) 2460 strcpy(data + i * ETH_GSTRING_LEN, 2461 ibmvnic_priv_flags[i]); 2462 break; 2463 default: 2464 return; 2465 } 2466 } 2467 2468 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 2469 { 2470 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2471 2472 switch (sset) { 2473 case ETH_SS_STATS: 2474 return ARRAY_SIZE(ibmvnic_stats) + 2475 adapter->req_tx_queues * NUM_TX_STATS + 2476 adapter->req_rx_queues * NUM_RX_STATS; 2477 case ETH_SS_PRIV_FLAGS: 2478 return ARRAY_SIZE(ibmvnic_priv_flags); 2479 default: 2480 return -EOPNOTSUPP; 2481 } 2482 } 2483 2484 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 2485 struct ethtool_stats *stats, u64 *data) 2486 { 2487 struct ibmvnic_adapter *adapter = netdev_priv(dev); 2488 union ibmvnic_crq crq; 2489 int i, j; 2490 int rc; 2491 2492 memset(&crq, 0, sizeof(crq)); 2493 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 2494 crq.request_statistics.cmd = REQUEST_STATISTICS; 2495 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 2496 crq.request_statistics.len = 2497 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 2498 2499 /* Wait for data to be written */ 2500 init_completion(&adapter->stats_done); 2501 rc = ibmvnic_send_crq(adapter, &crq); 2502 if (rc) 2503 return; 2504 wait_for_completion(&adapter->stats_done); 2505 2506 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 2507 data[i] = be64_to_cpu(IBMVNIC_GET_STAT(adapter, 2508 ibmvnic_stats[i].offset)); 2509 2510 for (j = 0; j < adapter->req_tx_queues; j++) { 2511 data[i] = adapter->tx_stats_buffers[j].packets; 2512 i++; 2513 data[i] = adapter->tx_stats_buffers[j].bytes; 2514 i++; 2515 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 2516 i++; 2517 } 2518 2519 for (j = 0; j < adapter->req_rx_queues; j++) { 2520 data[i] = adapter->rx_stats_buffers[j].packets; 2521 i++; 2522 data[i] = adapter->rx_stats_buffers[j].bytes; 2523 i++; 2524 data[i] = adapter->rx_stats_buffers[j].interrupts; 2525 i++; 2526 } 2527 } 2528 2529 static u32 ibmvnic_get_priv_flags(struct net_device *netdev) 2530 { 2531 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2532 2533 return adapter->priv_flags; 2534 } 2535 2536 static int ibmvnic_set_priv_flags(struct net_device *netdev, u32 flags) 2537 { 2538 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2539 bool which_maxes = !!(flags & IBMVNIC_USE_SERVER_MAXES); 2540 2541 if (which_maxes) 2542 adapter->priv_flags |= IBMVNIC_USE_SERVER_MAXES; 2543 else 2544 adapter->priv_flags &= ~IBMVNIC_USE_SERVER_MAXES; 2545 2546 return 0; 2547 } 2548 static const struct ethtool_ops ibmvnic_ethtool_ops = { 2549 .get_drvinfo = ibmvnic_get_drvinfo, 2550 .get_msglevel = ibmvnic_get_msglevel, 2551 .set_msglevel = ibmvnic_set_msglevel, 2552 .get_link = ibmvnic_get_link, 2553 .get_ringparam = ibmvnic_get_ringparam, 2554 .set_ringparam = ibmvnic_set_ringparam, 2555 .get_channels = ibmvnic_get_channels, 2556 .set_channels = ibmvnic_set_channels, 2557 .get_strings = ibmvnic_get_strings, 2558 .get_sset_count = ibmvnic_get_sset_count, 2559 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 2560 .get_link_ksettings = ibmvnic_get_link_ksettings, 2561 .get_priv_flags = ibmvnic_get_priv_flags, 2562 .set_priv_flags = ibmvnic_set_priv_flags, 2563 }; 2564 2565 /* Routines for managing CRQs/sCRQs */ 2566 2567 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 2568 struct ibmvnic_sub_crq_queue *scrq) 2569 { 2570 int rc; 2571 2572 if (scrq->irq) { 2573 free_irq(scrq->irq, scrq); 2574 irq_dispose_mapping(scrq->irq); 2575 scrq->irq = 0; 2576 } 2577 2578 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 2579 atomic_set(&scrq->used, 0); 2580 scrq->cur = 0; 2581 2582 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2583 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2584 return rc; 2585 } 2586 2587 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 2588 { 2589 int i, rc; 2590 2591 for (i = 0; i < adapter->req_tx_queues; i++) { 2592 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 2593 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 2594 if (rc) 2595 return rc; 2596 } 2597 2598 for (i = 0; i < adapter->req_rx_queues; i++) { 2599 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 2600 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 2601 if (rc) 2602 return rc; 2603 } 2604 2605 return rc; 2606 } 2607 2608 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 2609 struct ibmvnic_sub_crq_queue *scrq, 2610 bool do_h_free) 2611 { 2612 struct device *dev = &adapter->vdev->dev; 2613 long rc; 2614 2615 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 2616 2617 if (do_h_free) { 2618 /* Close the sub-crqs */ 2619 do { 2620 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 2621 adapter->vdev->unit_address, 2622 scrq->crq_num); 2623 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 2624 2625 if (rc) { 2626 netdev_err(adapter->netdev, 2627 "Failed to release sub-CRQ %16lx, rc = %ld\n", 2628 scrq->crq_num, rc); 2629 } 2630 } 2631 2632 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2633 DMA_BIDIRECTIONAL); 2634 free_pages((unsigned long)scrq->msgs, 2); 2635 kfree(scrq); 2636 } 2637 2638 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 2639 *adapter) 2640 { 2641 struct device *dev = &adapter->vdev->dev; 2642 struct ibmvnic_sub_crq_queue *scrq; 2643 int rc; 2644 2645 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 2646 if (!scrq) 2647 return NULL; 2648 2649 scrq->msgs = 2650 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 2651 if (!scrq->msgs) { 2652 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 2653 goto zero_page_failed; 2654 } 2655 2656 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 2657 DMA_BIDIRECTIONAL); 2658 if (dma_mapping_error(dev, scrq->msg_token)) { 2659 dev_warn(dev, "Couldn't map crq queue messages page\n"); 2660 goto map_failed; 2661 } 2662 2663 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 2664 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 2665 2666 if (rc == H_RESOURCE) 2667 rc = ibmvnic_reset_crq(adapter); 2668 2669 if (rc == H_CLOSED) { 2670 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 2671 } else if (rc) { 2672 dev_warn(dev, "Error %d registering sub-crq\n", rc); 2673 goto reg_failed; 2674 } 2675 2676 scrq->adapter = adapter; 2677 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 2678 spin_lock_init(&scrq->lock); 2679 2680 netdev_dbg(adapter->netdev, 2681 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 2682 scrq->crq_num, scrq->hw_irq, scrq->irq); 2683 2684 return scrq; 2685 2686 reg_failed: 2687 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 2688 DMA_BIDIRECTIONAL); 2689 map_failed: 2690 free_pages((unsigned long)scrq->msgs, 2); 2691 zero_page_failed: 2692 kfree(scrq); 2693 2694 return NULL; 2695 } 2696 2697 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 2698 { 2699 int i; 2700 2701 if (adapter->tx_scrq) { 2702 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 2703 if (!adapter->tx_scrq[i]) 2704 continue; 2705 2706 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 2707 i); 2708 if (adapter->tx_scrq[i]->irq) { 2709 free_irq(adapter->tx_scrq[i]->irq, 2710 adapter->tx_scrq[i]); 2711 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 2712 adapter->tx_scrq[i]->irq = 0; 2713 } 2714 2715 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 2716 do_h_free); 2717 } 2718 2719 kfree(adapter->tx_scrq); 2720 adapter->tx_scrq = NULL; 2721 adapter->num_active_tx_scrqs = 0; 2722 } 2723 2724 if (adapter->rx_scrq) { 2725 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 2726 if (!adapter->rx_scrq[i]) 2727 continue; 2728 2729 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 2730 i); 2731 if (adapter->rx_scrq[i]->irq) { 2732 free_irq(adapter->rx_scrq[i]->irq, 2733 adapter->rx_scrq[i]); 2734 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 2735 adapter->rx_scrq[i]->irq = 0; 2736 } 2737 2738 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 2739 do_h_free); 2740 } 2741 2742 kfree(adapter->rx_scrq); 2743 adapter->rx_scrq = NULL; 2744 adapter->num_active_rx_scrqs = 0; 2745 } 2746 } 2747 2748 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 2749 struct ibmvnic_sub_crq_queue *scrq) 2750 { 2751 struct device *dev = &adapter->vdev->dev; 2752 unsigned long rc; 2753 2754 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2755 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2756 if (rc) 2757 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 2758 scrq->hw_irq, rc); 2759 return rc; 2760 } 2761 2762 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 2763 struct ibmvnic_sub_crq_queue *scrq) 2764 { 2765 struct device *dev = &adapter->vdev->dev; 2766 unsigned long rc; 2767 2768 if (scrq->hw_irq > 0x100000000ULL) { 2769 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 2770 return 1; 2771 } 2772 2773 if (adapter->resetting && 2774 adapter->reset_reason == VNIC_RESET_MOBILITY) { 2775 u64 val = (0xff000000) | scrq->hw_irq; 2776 2777 rc = plpar_hcall_norets(H_EOI, val); 2778 if (rc) 2779 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", 2780 val, rc); 2781 } 2782 2783 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 2784 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 2785 if (rc) 2786 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 2787 scrq->hw_irq, rc); 2788 return rc; 2789 } 2790 2791 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 2792 struct ibmvnic_sub_crq_queue *scrq) 2793 { 2794 struct device *dev = &adapter->vdev->dev; 2795 struct ibmvnic_tx_pool *tx_pool; 2796 struct ibmvnic_tx_buff *txbuff; 2797 union sub_crq *next; 2798 int index; 2799 int i, j; 2800 u8 *first; 2801 2802 restart_loop: 2803 while (pending_scrq(adapter, scrq)) { 2804 unsigned int pool = scrq->pool_index; 2805 int num_entries = 0; 2806 2807 next = ibmvnic_next_scrq(adapter, scrq); 2808 for (i = 0; i < next->tx_comp.num_comps; i++) { 2809 if (next->tx_comp.rcs[i]) { 2810 dev_err(dev, "tx error %x\n", 2811 next->tx_comp.rcs[i]); 2812 continue; 2813 } 2814 index = be32_to_cpu(next->tx_comp.correlators[i]); 2815 if (index & IBMVNIC_TSO_POOL_MASK) { 2816 tx_pool = &adapter->tso_pool[pool]; 2817 index &= ~IBMVNIC_TSO_POOL_MASK; 2818 } else { 2819 tx_pool = &adapter->tx_pool[pool]; 2820 } 2821 2822 txbuff = &tx_pool->tx_buff[index]; 2823 2824 for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) { 2825 if (!txbuff->data_dma[j]) 2826 continue; 2827 2828 txbuff->data_dma[j] = 0; 2829 } 2830 /* if sub_crq was sent indirectly */ 2831 first = &txbuff->indir_arr[0].generic.first; 2832 if (*first == IBMVNIC_CRQ_CMD) { 2833 dma_unmap_single(dev, txbuff->indir_dma, 2834 sizeof(txbuff->indir_arr), 2835 DMA_TO_DEVICE); 2836 *first = 0; 2837 } 2838 2839 if (txbuff->last_frag) { 2840 dev_kfree_skb_any(txbuff->skb); 2841 txbuff->skb = NULL; 2842 } 2843 2844 num_entries += txbuff->num_entries; 2845 2846 tx_pool->free_map[tx_pool->producer_index] = index; 2847 tx_pool->producer_index = 2848 (tx_pool->producer_index + 1) % 2849 tx_pool->num_buffers; 2850 } 2851 /* remove tx_comp scrq*/ 2852 next->tx_comp.first = 0; 2853 2854 if (atomic_sub_return(num_entries, &scrq->used) <= 2855 (adapter->req_tx_entries_per_subcrq / 2) && 2856 __netif_subqueue_stopped(adapter->netdev, 2857 scrq->pool_index)) { 2858 netif_wake_subqueue(adapter->netdev, scrq->pool_index); 2859 netdev_dbg(adapter->netdev, "Started queue %d\n", 2860 scrq->pool_index); 2861 } 2862 } 2863 2864 enable_scrq_irq(adapter, scrq); 2865 2866 if (pending_scrq(adapter, scrq)) { 2867 disable_scrq_irq(adapter, scrq); 2868 goto restart_loop; 2869 } 2870 2871 return 0; 2872 } 2873 2874 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 2875 { 2876 struct ibmvnic_sub_crq_queue *scrq = instance; 2877 struct ibmvnic_adapter *adapter = scrq->adapter; 2878 2879 disable_scrq_irq(adapter, scrq); 2880 ibmvnic_complete_tx(adapter, scrq); 2881 2882 return IRQ_HANDLED; 2883 } 2884 2885 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 2886 { 2887 struct ibmvnic_sub_crq_queue *scrq = instance; 2888 struct ibmvnic_adapter *adapter = scrq->adapter; 2889 2890 /* When booting a kdump kernel we can hit pending interrupts 2891 * prior to completing driver initialization. 2892 */ 2893 if (unlikely(adapter->state != VNIC_OPEN)) 2894 return IRQ_NONE; 2895 2896 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 2897 2898 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 2899 disable_scrq_irq(adapter, scrq); 2900 __napi_schedule(&adapter->napi[scrq->scrq_num]); 2901 } 2902 2903 return IRQ_HANDLED; 2904 } 2905 2906 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 2907 { 2908 struct device *dev = &adapter->vdev->dev; 2909 struct ibmvnic_sub_crq_queue *scrq; 2910 int i = 0, j = 0; 2911 int rc = 0; 2912 2913 for (i = 0; i < adapter->req_tx_queues; i++) { 2914 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 2915 i); 2916 scrq = adapter->tx_scrq[i]; 2917 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2918 2919 if (!scrq->irq) { 2920 rc = -EINVAL; 2921 dev_err(dev, "Error mapping irq\n"); 2922 goto req_tx_irq_failed; 2923 } 2924 2925 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 2926 0, "ibmvnic_tx", scrq); 2927 2928 if (rc) { 2929 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 2930 scrq->irq, rc); 2931 irq_dispose_mapping(scrq->irq); 2932 goto req_tx_irq_failed; 2933 } 2934 } 2935 2936 for (i = 0; i < adapter->req_rx_queues; i++) { 2937 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 2938 i); 2939 scrq = adapter->rx_scrq[i]; 2940 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 2941 if (!scrq->irq) { 2942 rc = -EINVAL; 2943 dev_err(dev, "Error mapping irq\n"); 2944 goto req_rx_irq_failed; 2945 } 2946 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 2947 0, "ibmvnic_rx", scrq); 2948 if (rc) { 2949 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 2950 scrq->irq, rc); 2951 irq_dispose_mapping(scrq->irq); 2952 goto req_rx_irq_failed; 2953 } 2954 } 2955 return rc; 2956 2957 req_rx_irq_failed: 2958 for (j = 0; j < i; j++) { 2959 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 2960 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2961 } 2962 i = adapter->req_tx_queues; 2963 req_tx_irq_failed: 2964 for (j = 0; j < i; j++) { 2965 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 2966 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 2967 } 2968 release_sub_crqs(adapter, 1); 2969 return rc; 2970 } 2971 2972 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 2973 { 2974 struct device *dev = &adapter->vdev->dev; 2975 struct ibmvnic_sub_crq_queue **allqueues; 2976 int registered_queues = 0; 2977 int total_queues; 2978 int more = 0; 2979 int i; 2980 2981 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 2982 2983 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 2984 if (!allqueues) 2985 return -1; 2986 2987 for (i = 0; i < total_queues; i++) { 2988 allqueues[i] = init_sub_crq_queue(adapter); 2989 if (!allqueues[i]) { 2990 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 2991 break; 2992 } 2993 registered_queues++; 2994 } 2995 2996 /* Make sure we were able to register the minimum number of queues */ 2997 if (registered_queues < 2998 adapter->min_tx_queues + adapter->min_rx_queues) { 2999 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 3000 goto tx_failed; 3001 } 3002 3003 /* Distribute the failed allocated queues*/ 3004 for (i = 0; i < total_queues - registered_queues + more ; i++) { 3005 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 3006 switch (i % 3) { 3007 case 0: 3008 if (adapter->req_rx_queues > adapter->min_rx_queues) 3009 adapter->req_rx_queues--; 3010 else 3011 more++; 3012 break; 3013 case 1: 3014 if (adapter->req_tx_queues > adapter->min_tx_queues) 3015 adapter->req_tx_queues--; 3016 else 3017 more++; 3018 break; 3019 } 3020 } 3021 3022 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 3023 sizeof(*adapter->tx_scrq), GFP_KERNEL); 3024 if (!adapter->tx_scrq) 3025 goto tx_failed; 3026 3027 for (i = 0; i < adapter->req_tx_queues; i++) { 3028 adapter->tx_scrq[i] = allqueues[i]; 3029 adapter->tx_scrq[i]->pool_index = i; 3030 adapter->num_active_tx_scrqs++; 3031 } 3032 3033 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 3034 sizeof(*adapter->rx_scrq), GFP_KERNEL); 3035 if (!adapter->rx_scrq) 3036 goto rx_failed; 3037 3038 for (i = 0; i < adapter->req_rx_queues; i++) { 3039 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 3040 adapter->rx_scrq[i]->scrq_num = i; 3041 adapter->num_active_rx_scrqs++; 3042 } 3043 3044 kfree(allqueues); 3045 return 0; 3046 3047 rx_failed: 3048 kfree(adapter->tx_scrq); 3049 adapter->tx_scrq = NULL; 3050 tx_failed: 3051 for (i = 0; i < registered_queues; i++) 3052 release_sub_crq_queue(adapter, allqueues[i], 1); 3053 kfree(allqueues); 3054 return -1; 3055 } 3056 3057 static void ibmvnic_send_req_caps(struct ibmvnic_adapter *adapter, int retry) 3058 { 3059 struct device *dev = &adapter->vdev->dev; 3060 union ibmvnic_crq crq; 3061 int max_entries; 3062 3063 if (!retry) { 3064 /* Sub-CRQ entries are 32 byte long */ 3065 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 3066 3067 if (adapter->min_tx_entries_per_subcrq > entries_page || 3068 adapter->min_rx_add_entries_per_subcrq > entries_page) { 3069 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 3070 return; 3071 } 3072 3073 if (adapter->desired.mtu) 3074 adapter->req_mtu = adapter->desired.mtu; 3075 else 3076 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 3077 3078 if (!adapter->desired.tx_entries) 3079 adapter->desired.tx_entries = 3080 adapter->max_tx_entries_per_subcrq; 3081 if (!adapter->desired.rx_entries) 3082 adapter->desired.rx_entries = 3083 adapter->max_rx_add_entries_per_subcrq; 3084 3085 max_entries = IBMVNIC_MAX_LTB_SIZE / 3086 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 3087 3088 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3089 adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) { 3090 adapter->desired.tx_entries = max_entries; 3091 } 3092 3093 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 3094 adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) { 3095 adapter->desired.rx_entries = max_entries; 3096 } 3097 3098 if (adapter->desired.tx_entries) 3099 adapter->req_tx_entries_per_subcrq = 3100 adapter->desired.tx_entries; 3101 else 3102 adapter->req_tx_entries_per_subcrq = 3103 adapter->max_tx_entries_per_subcrq; 3104 3105 if (adapter->desired.rx_entries) 3106 adapter->req_rx_add_entries_per_subcrq = 3107 adapter->desired.rx_entries; 3108 else 3109 adapter->req_rx_add_entries_per_subcrq = 3110 adapter->max_rx_add_entries_per_subcrq; 3111 3112 if (adapter->desired.tx_queues) 3113 adapter->req_tx_queues = 3114 adapter->desired.tx_queues; 3115 else 3116 adapter->req_tx_queues = 3117 adapter->opt_tx_comp_sub_queues; 3118 3119 if (adapter->desired.rx_queues) 3120 adapter->req_rx_queues = 3121 adapter->desired.rx_queues; 3122 else 3123 adapter->req_rx_queues = 3124 adapter->opt_rx_comp_queues; 3125 3126 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 3127 } 3128 3129 memset(&crq, 0, sizeof(crq)); 3130 crq.request_capability.first = IBMVNIC_CRQ_CMD; 3131 crq.request_capability.cmd = REQUEST_CAPABILITY; 3132 3133 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 3134 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 3135 atomic_inc(&adapter->running_cap_crqs); 3136 ibmvnic_send_crq(adapter, &crq); 3137 3138 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 3139 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 3140 atomic_inc(&adapter->running_cap_crqs); 3141 ibmvnic_send_crq(adapter, &crq); 3142 3143 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 3144 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 3145 atomic_inc(&adapter->running_cap_crqs); 3146 ibmvnic_send_crq(adapter, &crq); 3147 3148 crq.request_capability.capability = 3149 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 3150 crq.request_capability.number = 3151 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 3152 atomic_inc(&adapter->running_cap_crqs); 3153 ibmvnic_send_crq(adapter, &crq); 3154 3155 crq.request_capability.capability = 3156 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 3157 crq.request_capability.number = 3158 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 3159 atomic_inc(&adapter->running_cap_crqs); 3160 ibmvnic_send_crq(adapter, &crq); 3161 3162 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 3163 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 3164 atomic_inc(&adapter->running_cap_crqs); 3165 ibmvnic_send_crq(adapter, &crq); 3166 3167 if (adapter->netdev->flags & IFF_PROMISC) { 3168 if (adapter->promisc_supported) { 3169 crq.request_capability.capability = 3170 cpu_to_be16(PROMISC_REQUESTED); 3171 crq.request_capability.number = cpu_to_be64(1); 3172 atomic_inc(&adapter->running_cap_crqs); 3173 ibmvnic_send_crq(adapter, &crq); 3174 } 3175 } else { 3176 crq.request_capability.capability = 3177 cpu_to_be16(PROMISC_REQUESTED); 3178 crq.request_capability.number = cpu_to_be64(0); 3179 atomic_inc(&adapter->running_cap_crqs); 3180 ibmvnic_send_crq(adapter, &crq); 3181 } 3182 } 3183 3184 static int pending_scrq(struct ibmvnic_adapter *adapter, 3185 struct ibmvnic_sub_crq_queue *scrq) 3186 { 3187 union sub_crq *entry = &scrq->msgs[scrq->cur]; 3188 3189 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) 3190 return 1; 3191 else 3192 return 0; 3193 } 3194 3195 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 3196 struct ibmvnic_sub_crq_queue *scrq) 3197 { 3198 union sub_crq *entry; 3199 unsigned long flags; 3200 3201 spin_lock_irqsave(&scrq->lock, flags); 3202 entry = &scrq->msgs[scrq->cur]; 3203 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3204 if (++scrq->cur == scrq->size) 3205 scrq->cur = 0; 3206 } else { 3207 entry = NULL; 3208 } 3209 spin_unlock_irqrestore(&scrq->lock, flags); 3210 3211 return entry; 3212 } 3213 3214 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 3215 { 3216 struct ibmvnic_crq_queue *queue = &adapter->crq; 3217 union ibmvnic_crq *crq; 3218 3219 crq = &queue->msgs[queue->cur]; 3220 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 3221 if (++queue->cur == queue->size) 3222 queue->cur = 0; 3223 } else { 3224 crq = NULL; 3225 } 3226 3227 return crq; 3228 } 3229 3230 static void print_subcrq_error(struct device *dev, int rc, const char *func) 3231 { 3232 switch (rc) { 3233 case H_PARAMETER: 3234 dev_warn_ratelimited(dev, 3235 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 3236 func, rc); 3237 break; 3238 case H_CLOSED: 3239 dev_warn_ratelimited(dev, 3240 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 3241 func, rc); 3242 break; 3243 default: 3244 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 3245 break; 3246 } 3247 } 3248 3249 static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle, 3250 union sub_crq *sub_crq) 3251 { 3252 unsigned int ua = adapter->vdev->unit_address; 3253 struct device *dev = &adapter->vdev->dev; 3254 u64 *u64_crq = (u64 *)sub_crq; 3255 int rc; 3256 3257 netdev_dbg(adapter->netdev, 3258 "Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n", 3259 (unsigned long int)cpu_to_be64(remote_handle), 3260 (unsigned long int)cpu_to_be64(u64_crq[0]), 3261 (unsigned long int)cpu_to_be64(u64_crq[1]), 3262 (unsigned long int)cpu_to_be64(u64_crq[2]), 3263 (unsigned long int)cpu_to_be64(u64_crq[3])); 3264 3265 /* Make sure the hypervisor sees the complete request */ 3266 mb(); 3267 3268 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 3269 cpu_to_be64(remote_handle), 3270 cpu_to_be64(u64_crq[0]), 3271 cpu_to_be64(u64_crq[1]), 3272 cpu_to_be64(u64_crq[2]), 3273 cpu_to_be64(u64_crq[3])); 3274 3275 if (rc) 3276 print_subcrq_error(dev, rc, __func__); 3277 3278 return rc; 3279 } 3280 3281 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 3282 u64 remote_handle, u64 ioba, u64 num_entries) 3283 { 3284 unsigned int ua = adapter->vdev->unit_address; 3285 struct device *dev = &adapter->vdev->dev; 3286 int rc; 3287 3288 /* Make sure the hypervisor sees the complete request */ 3289 mb(); 3290 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 3291 cpu_to_be64(remote_handle), 3292 ioba, num_entries); 3293 3294 if (rc) 3295 print_subcrq_error(dev, rc, __func__); 3296 3297 return rc; 3298 } 3299 3300 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 3301 union ibmvnic_crq *crq) 3302 { 3303 unsigned int ua = adapter->vdev->unit_address; 3304 struct device *dev = &adapter->vdev->dev; 3305 u64 *u64_crq = (u64 *)crq; 3306 int rc; 3307 3308 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 3309 (unsigned long int)cpu_to_be64(u64_crq[0]), 3310 (unsigned long int)cpu_to_be64(u64_crq[1])); 3311 3312 if (!adapter->crq.active && 3313 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 3314 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 3315 return -EINVAL; 3316 } 3317 3318 /* Make sure the hypervisor sees the complete request */ 3319 mb(); 3320 3321 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 3322 cpu_to_be64(u64_crq[0]), 3323 cpu_to_be64(u64_crq[1])); 3324 3325 if (rc) { 3326 if (rc == H_CLOSED) { 3327 dev_warn(dev, "CRQ Queue closed\n"); 3328 if (adapter->resetting) 3329 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3330 } 3331 3332 dev_warn(dev, "Send error (rc=%d)\n", rc); 3333 } 3334 3335 return rc; 3336 } 3337 3338 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 3339 { 3340 union ibmvnic_crq crq; 3341 3342 memset(&crq, 0, sizeof(crq)); 3343 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 3344 crq.generic.cmd = IBMVNIC_CRQ_INIT; 3345 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 3346 3347 return ibmvnic_send_crq(adapter, &crq); 3348 } 3349 3350 static int send_version_xchg(struct ibmvnic_adapter *adapter) 3351 { 3352 union ibmvnic_crq crq; 3353 3354 memset(&crq, 0, sizeof(crq)); 3355 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 3356 crq.version_exchange.cmd = VERSION_EXCHANGE; 3357 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 3358 3359 return ibmvnic_send_crq(adapter, &crq); 3360 } 3361 3362 struct vnic_login_client_data { 3363 u8 type; 3364 __be16 len; 3365 char name[]; 3366 } __packed; 3367 3368 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 3369 { 3370 int len; 3371 3372 /* Calculate the amount of buffer space needed for the 3373 * vnic client data in the login buffer. There are four entries, 3374 * OS name, LPAR name, device name, and a null last entry. 3375 */ 3376 len = 4 * sizeof(struct vnic_login_client_data); 3377 len += 6; /* "Linux" plus NULL */ 3378 len += strlen(utsname()->nodename) + 1; 3379 len += strlen(adapter->netdev->name) + 1; 3380 3381 return len; 3382 } 3383 3384 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 3385 struct vnic_login_client_data *vlcd) 3386 { 3387 const char *os_name = "Linux"; 3388 int len; 3389 3390 /* Type 1 - LPAR OS */ 3391 vlcd->type = 1; 3392 len = strlen(os_name) + 1; 3393 vlcd->len = cpu_to_be16(len); 3394 strncpy(vlcd->name, os_name, len); 3395 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3396 3397 /* Type 2 - LPAR name */ 3398 vlcd->type = 2; 3399 len = strlen(utsname()->nodename) + 1; 3400 vlcd->len = cpu_to_be16(len); 3401 strncpy(vlcd->name, utsname()->nodename, len); 3402 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 3403 3404 /* Type 3 - device name */ 3405 vlcd->type = 3; 3406 len = strlen(adapter->netdev->name) + 1; 3407 vlcd->len = cpu_to_be16(len); 3408 strncpy(vlcd->name, adapter->netdev->name, len); 3409 } 3410 3411 static int send_login(struct ibmvnic_adapter *adapter) 3412 { 3413 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 3414 struct ibmvnic_login_buffer *login_buffer; 3415 struct device *dev = &adapter->vdev->dev; 3416 dma_addr_t rsp_buffer_token; 3417 dma_addr_t buffer_token; 3418 size_t rsp_buffer_size; 3419 union ibmvnic_crq crq; 3420 size_t buffer_size; 3421 __be64 *tx_list_p; 3422 __be64 *rx_list_p; 3423 int client_data_len; 3424 struct vnic_login_client_data *vlcd; 3425 int i; 3426 3427 if (!adapter->tx_scrq || !adapter->rx_scrq) { 3428 netdev_err(adapter->netdev, 3429 "RX or TX queues are not allocated, device login failed\n"); 3430 return -1; 3431 } 3432 3433 release_login_rsp_buffer(adapter); 3434 client_data_len = vnic_client_data_len(adapter); 3435 3436 buffer_size = 3437 sizeof(struct ibmvnic_login_buffer) + 3438 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 3439 client_data_len; 3440 3441 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 3442 if (!login_buffer) 3443 goto buf_alloc_failed; 3444 3445 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 3446 DMA_TO_DEVICE); 3447 if (dma_mapping_error(dev, buffer_token)) { 3448 dev_err(dev, "Couldn't map login buffer\n"); 3449 goto buf_map_failed; 3450 } 3451 3452 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 3453 sizeof(u64) * adapter->req_tx_queues + 3454 sizeof(u64) * adapter->req_rx_queues + 3455 sizeof(u64) * adapter->req_rx_queues + 3456 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 3457 3458 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 3459 if (!login_rsp_buffer) 3460 goto buf_rsp_alloc_failed; 3461 3462 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 3463 rsp_buffer_size, DMA_FROM_DEVICE); 3464 if (dma_mapping_error(dev, rsp_buffer_token)) { 3465 dev_err(dev, "Couldn't map login rsp buffer\n"); 3466 goto buf_rsp_map_failed; 3467 } 3468 3469 adapter->login_buf = login_buffer; 3470 adapter->login_buf_token = buffer_token; 3471 adapter->login_buf_sz = buffer_size; 3472 adapter->login_rsp_buf = login_rsp_buffer; 3473 adapter->login_rsp_buf_token = rsp_buffer_token; 3474 adapter->login_rsp_buf_sz = rsp_buffer_size; 3475 3476 login_buffer->len = cpu_to_be32(buffer_size); 3477 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 3478 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 3479 login_buffer->off_txcomp_subcrqs = 3480 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 3481 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 3482 login_buffer->off_rxcomp_subcrqs = 3483 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 3484 sizeof(u64) * adapter->req_tx_queues); 3485 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 3486 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 3487 3488 tx_list_p = (__be64 *)((char *)login_buffer + 3489 sizeof(struct ibmvnic_login_buffer)); 3490 rx_list_p = (__be64 *)((char *)login_buffer + 3491 sizeof(struct ibmvnic_login_buffer) + 3492 sizeof(u64) * adapter->req_tx_queues); 3493 3494 for (i = 0; i < adapter->req_tx_queues; i++) { 3495 if (adapter->tx_scrq[i]) { 3496 tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]-> 3497 crq_num); 3498 } 3499 } 3500 3501 for (i = 0; i < adapter->req_rx_queues; i++) { 3502 if (adapter->rx_scrq[i]) { 3503 rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]-> 3504 crq_num); 3505 } 3506 } 3507 3508 /* Insert vNIC login client data */ 3509 vlcd = (struct vnic_login_client_data *) 3510 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 3511 login_buffer->client_data_offset = 3512 cpu_to_be32((char *)vlcd - (char *)login_buffer); 3513 login_buffer->client_data_len = cpu_to_be32(client_data_len); 3514 3515 vnic_add_client_data(adapter, vlcd); 3516 3517 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 3518 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 3519 netdev_dbg(adapter->netdev, "%016lx\n", 3520 ((unsigned long int *)(adapter->login_buf))[i]); 3521 } 3522 3523 memset(&crq, 0, sizeof(crq)); 3524 crq.login.first = IBMVNIC_CRQ_CMD; 3525 crq.login.cmd = LOGIN; 3526 crq.login.ioba = cpu_to_be32(buffer_token); 3527 crq.login.len = cpu_to_be32(buffer_size); 3528 ibmvnic_send_crq(adapter, &crq); 3529 3530 return 0; 3531 3532 buf_rsp_map_failed: 3533 kfree(login_rsp_buffer); 3534 buf_rsp_alloc_failed: 3535 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 3536 buf_map_failed: 3537 kfree(login_buffer); 3538 buf_alloc_failed: 3539 return -1; 3540 } 3541 3542 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 3543 u32 len, u8 map_id) 3544 { 3545 union ibmvnic_crq crq; 3546 3547 memset(&crq, 0, sizeof(crq)); 3548 crq.request_map.first = IBMVNIC_CRQ_CMD; 3549 crq.request_map.cmd = REQUEST_MAP; 3550 crq.request_map.map_id = map_id; 3551 crq.request_map.ioba = cpu_to_be32(addr); 3552 crq.request_map.len = cpu_to_be32(len); 3553 return ibmvnic_send_crq(adapter, &crq); 3554 } 3555 3556 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 3557 { 3558 union ibmvnic_crq crq; 3559 3560 memset(&crq, 0, sizeof(crq)); 3561 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 3562 crq.request_unmap.cmd = REQUEST_UNMAP; 3563 crq.request_unmap.map_id = map_id; 3564 return ibmvnic_send_crq(adapter, &crq); 3565 } 3566 3567 static void send_map_query(struct ibmvnic_adapter *adapter) 3568 { 3569 union ibmvnic_crq crq; 3570 3571 memset(&crq, 0, sizeof(crq)); 3572 crq.query_map.first = IBMVNIC_CRQ_CMD; 3573 crq.query_map.cmd = QUERY_MAP; 3574 ibmvnic_send_crq(adapter, &crq); 3575 } 3576 3577 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 3578 static void send_cap_queries(struct ibmvnic_adapter *adapter) 3579 { 3580 union ibmvnic_crq crq; 3581 3582 atomic_set(&adapter->running_cap_crqs, 0); 3583 memset(&crq, 0, sizeof(crq)); 3584 crq.query_capability.first = IBMVNIC_CRQ_CMD; 3585 crq.query_capability.cmd = QUERY_CAPABILITY; 3586 3587 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 3588 atomic_inc(&adapter->running_cap_crqs); 3589 ibmvnic_send_crq(adapter, &crq); 3590 3591 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 3592 atomic_inc(&adapter->running_cap_crqs); 3593 ibmvnic_send_crq(adapter, &crq); 3594 3595 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 3596 atomic_inc(&adapter->running_cap_crqs); 3597 ibmvnic_send_crq(adapter, &crq); 3598 3599 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 3600 atomic_inc(&adapter->running_cap_crqs); 3601 ibmvnic_send_crq(adapter, &crq); 3602 3603 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 3604 atomic_inc(&adapter->running_cap_crqs); 3605 ibmvnic_send_crq(adapter, &crq); 3606 3607 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 3608 atomic_inc(&adapter->running_cap_crqs); 3609 ibmvnic_send_crq(adapter, &crq); 3610 3611 crq.query_capability.capability = 3612 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 3613 atomic_inc(&adapter->running_cap_crqs); 3614 ibmvnic_send_crq(adapter, &crq); 3615 3616 crq.query_capability.capability = 3617 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 3618 atomic_inc(&adapter->running_cap_crqs); 3619 ibmvnic_send_crq(adapter, &crq); 3620 3621 crq.query_capability.capability = 3622 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 3623 atomic_inc(&adapter->running_cap_crqs); 3624 ibmvnic_send_crq(adapter, &crq); 3625 3626 crq.query_capability.capability = 3627 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 3628 atomic_inc(&adapter->running_cap_crqs); 3629 ibmvnic_send_crq(adapter, &crq); 3630 3631 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 3632 atomic_inc(&adapter->running_cap_crqs); 3633 ibmvnic_send_crq(adapter, &crq); 3634 3635 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 3636 atomic_inc(&adapter->running_cap_crqs); 3637 ibmvnic_send_crq(adapter, &crq); 3638 3639 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 3640 atomic_inc(&adapter->running_cap_crqs); 3641 ibmvnic_send_crq(adapter, &crq); 3642 3643 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 3644 atomic_inc(&adapter->running_cap_crqs); 3645 ibmvnic_send_crq(adapter, &crq); 3646 3647 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 3648 atomic_inc(&adapter->running_cap_crqs); 3649 ibmvnic_send_crq(adapter, &crq); 3650 3651 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 3652 atomic_inc(&adapter->running_cap_crqs); 3653 ibmvnic_send_crq(adapter, &crq); 3654 3655 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 3656 atomic_inc(&adapter->running_cap_crqs); 3657 ibmvnic_send_crq(adapter, &crq); 3658 3659 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 3660 atomic_inc(&adapter->running_cap_crqs); 3661 ibmvnic_send_crq(adapter, &crq); 3662 3663 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 3664 atomic_inc(&adapter->running_cap_crqs); 3665 ibmvnic_send_crq(adapter, &crq); 3666 3667 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 3668 atomic_inc(&adapter->running_cap_crqs); 3669 ibmvnic_send_crq(adapter, &crq); 3670 3671 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 3672 atomic_inc(&adapter->running_cap_crqs); 3673 ibmvnic_send_crq(adapter, &crq); 3674 3675 crq.query_capability.capability = 3676 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 3677 atomic_inc(&adapter->running_cap_crqs); 3678 ibmvnic_send_crq(adapter, &crq); 3679 3680 crq.query_capability.capability = 3681 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 3682 atomic_inc(&adapter->running_cap_crqs); 3683 ibmvnic_send_crq(adapter, &crq); 3684 3685 crq.query_capability.capability = 3686 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 3687 atomic_inc(&adapter->running_cap_crqs); 3688 ibmvnic_send_crq(adapter, &crq); 3689 3690 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 3691 atomic_inc(&adapter->running_cap_crqs); 3692 ibmvnic_send_crq(adapter, &crq); 3693 } 3694 3695 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 3696 struct ibmvnic_adapter *adapter) 3697 { 3698 struct device *dev = &adapter->vdev->dev; 3699 3700 if (crq->get_vpd_size_rsp.rc.code) { 3701 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 3702 crq->get_vpd_size_rsp.rc.code); 3703 complete(&adapter->fw_done); 3704 return; 3705 } 3706 3707 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 3708 complete(&adapter->fw_done); 3709 } 3710 3711 static void handle_vpd_rsp(union ibmvnic_crq *crq, 3712 struct ibmvnic_adapter *adapter) 3713 { 3714 struct device *dev = &adapter->vdev->dev; 3715 unsigned char *substr = NULL; 3716 u8 fw_level_len = 0; 3717 3718 memset(adapter->fw_version, 0, 32); 3719 3720 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 3721 DMA_FROM_DEVICE); 3722 3723 if (crq->get_vpd_rsp.rc.code) { 3724 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 3725 crq->get_vpd_rsp.rc.code); 3726 goto complete; 3727 } 3728 3729 /* get the position of the firmware version info 3730 * located after the ASCII 'RM' substring in the buffer 3731 */ 3732 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 3733 if (!substr) { 3734 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 3735 goto complete; 3736 } 3737 3738 /* get length of firmware level ASCII substring */ 3739 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 3740 fw_level_len = *(substr + 2); 3741 } else { 3742 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 3743 goto complete; 3744 } 3745 3746 /* copy firmware version string from vpd into adapter */ 3747 if ((substr + 3 + fw_level_len) < 3748 (adapter->vpd->buff + adapter->vpd->len)) { 3749 strncpy((char *)adapter->fw_version, substr + 3, fw_level_len); 3750 } else { 3751 dev_info(dev, "FW substr extrapolated VPD buff\n"); 3752 } 3753 3754 complete: 3755 if (adapter->fw_version[0] == '\0') 3756 strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char)); 3757 complete(&adapter->fw_done); 3758 } 3759 3760 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 3761 { 3762 struct device *dev = &adapter->vdev->dev; 3763 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 3764 union ibmvnic_crq crq; 3765 int i; 3766 3767 dma_unmap_single(dev, adapter->ip_offload_tok, 3768 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 3769 3770 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 3771 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 3772 netdev_dbg(adapter->netdev, "%016lx\n", 3773 ((unsigned long int *)(buf))[i]); 3774 3775 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 3776 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 3777 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 3778 buf->tcp_ipv4_chksum); 3779 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 3780 buf->tcp_ipv6_chksum); 3781 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 3782 buf->udp_ipv4_chksum); 3783 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 3784 buf->udp_ipv6_chksum); 3785 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 3786 buf->large_tx_ipv4); 3787 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 3788 buf->large_tx_ipv6); 3789 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 3790 buf->large_rx_ipv4); 3791 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 3792 buf->large_rx_ipv6); 3793 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 3794 buf->max_ipv4_header_size); 3795 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 3796 buf->max_ipv6_header_size); 3797 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 3798 buf->max_tcp_header_size); 3799 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 3800 buf->max_udp_header_size); 3801 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 3802 buf->max_large_tx_size); 3803 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 3804 buf->max_large_rx_size); 3805 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 3806 buf->ipv6_extension_header); 3807 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 3808 buf->tcp_pseudosum_req); 3809 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 3810 buf->num_ipv6_ext_headers); 3811 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 3812 buf->off_ipv6_ext_headers); 3813 3814 adapter->ip_offload_ctrl_tok = 3815 dma_map_single(dev, &adapter->ip_offload_ctrl, 3816 sizeof(adapter->ip_offload_ctrl), DMA_TO_DEVICE); 3817 3818 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 3819 dev_err(dev, "Couldn't map ip offload control buffer\n"); 3820 return; 3821 } 3822 3823 adapter->ip_offload_ctrl.len = 3824 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3825 adapter->ip_offload_ctrl.version = cpu_to_be32(INITIAL_VERSION_IOB); 3826 adapter->ip_offload_ctrl.ipv4_chksum = buf->ipv4_chksum; 3827 adapter->ip_offload_ctrl.ipv6_chksum = buf->ipv6_chksum; 3828 adapter->ip_offload_ctrl.tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 3829 adapter->ip_offload_ctrl.udp_ipv4_chksum = buf->udp_ipv4_chksum; 3830 adapter->ip_offload_ctrl.tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 3831 adapter->ip_offload_ctrl.udp_ipv6_chksum = buf->udp_ipv6_chksum; 3832 adapter->ip_offload_ctrl.large_tx_ipv4 = buf->large_tx_ipv4; 3833 adapter->ip_offload_ctrl.large_tx_ipv6 = buf->large_tx_ipv6; 3834 3835 /* large_rx disabled for now, additional features needed */ 3836 adapter->ip_offload_ctrl.large_rx_ipv4 = 0; 3837 adapter->ip_offload_ctrl.large_rx_ipv6 = 0; 3838 3839 adapter->netdev->features = NETIF_F_SG | NETIF_F_GSO; 3840 3841 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 3842 adapter->netdev->features |= NETIF_F_IP_CSUM; 3843 3844 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 3845 adapter->netdev->features |= NETIF_F_IPV6_CSUM; 3846 3847 if ((adapter->netdev->features & 3848 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 3849 adapter->netdev->features |= NETIF_F_RXCSUM; 3850 3851 if (buf->large_tx_ipv4) 3852 adapter->netdev->features |= NETIF_F_TSO; 3853 if (buf->large_tx_ipv6) 3854 adapter->netdev->features |= NETIF_F_TSO6; 3855 3856 adapter->netdev->hw_features |= adapter->netdev->features; 3857 3858 memset(&crq, 0, sizeof(crq)); 3859 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 3860 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 3861 crq.control_ip_offload.len = 3862 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 3863 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 3864 ibmvnic_send_crq(adapter, &crq); 3865 } 3866 3867 static const char *ibmvnic_fw_err_cause(u16 cause) 3868 { 3869 switch (cause) { 3870 case ADAPTER_PROBLEM: 3871 return "adapter problem"; 3872 case BUS_PROBLEM: 3873 return "bus problem"; 3874 case FW_PROBLEM: 3875 return "firmware problem"; 3876 case DD_PROBLEM: 3877 return "device driver problem"; 3878 case EEH_RECOVERY: 3879 return "EEH recovery"; 3880 case FW_UPDATED: 3881 return "firmware updated"; 3882 case LOW_MEMORY: 3883 return "low Memory"; 3884 default: 3885 return "unknown"; 3886 } 3887 } 3888 3889 static void handle_error_indication(union ibmvnic_crq *crq, 3890 struct ibmvnic_adapter *adapter) 3891 { 3892 struct device *dev = &adapter->vdev->dev; 3893 u16 cause; 3894 3895 cause = be16_to_cpu(crq->error_indication.error_cause); 3896 3897 dev_warn_ratelimited(dev, 3898 "Firmware reports %serror, cause: %s. Starting recovery...\n", 3899 crq->error_indication.flags 3900 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 3901 ibmvnic_fw_err_cause(cause)); 3902 3903 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 3904 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 3905 else 3906 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 3907 } 3908 3909 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 3910 struct ibmvnic_adapter *adapter) 3911 { 3912 struct net_device *netdev = adapter->netdev; 3913 struct device *dev = &adapter->vdev->dev; 3914 long rc; 3915 3916 rc = crq->change_mac_addr_rsp.rc.code; 3917 if (rc) { 3918 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 3919 goto out; 3920 } 3921 memcpy(netdev->dev_addr, &crq->change_mac_addr_rsp.mac_addr[0], 3922 ETH_ALEN); 3923 out: 3924 complete(&adapter->fw_done); 3925 return rc; 3926 } 3927 3928 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 3929 struct ibmvnic_adapter *adapter) 3930 { 3931 struct device *dev = &adapter->vdev->dev; 3932 u64 *req_value; 3933 char *name; 3934 3935 atomic_dec(&adapter->running_cap_crqs); 3936 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 3937 case REQ_TX_QUEUES: 3938 req_value = &adapter->req_tx_queues; 3939 name = "tx"; 3940 break; 3941 case REQ_RX_QUEUES: 3942 req_value = &adapter->req_rx_queues; 3943 name = "rx"; 3944 break; 3945 case REQ_RX_ADD_QUEUES: 3946 req_value = &adapter->req_rx_add_queues; 3947 name = "rx_add"; 3948 break; 3949 case REQ_TX_ENTRIES_PER_SUBCRQ: 3950 req_value = &adapter->req_tx_entries_per_subcrq; 3951 name = "tx_entries_per_subcrq"; 3952 break; 3953 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 3954 req_value = &adapter->req_rx_add_entries_per_subcrq; 3955 name = "rx_add_entries_per_subcrq"; 3956 break; 3957 case REQ_MTU: 3958 req_value = &adapter->req_mtu; 3959 name = "mtu"; 3960 break; 3961 case PROMISC_REQUESTED: 3962 req_value = &adapter->promisc; 3963 name = "promisc"; 3964 break; 3965 default: 3966 dev_err(dev, "Got invalid cap request rsp %d\n", 3967 crq->request_capability.capability); 3968 return; 3969 } 3970 3971 switch (crq->request_capability_rsp.rc.code) { 3972 case SUCCESS: 3973 break; 3974 case PARTIALSUCCESS: 3975 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 3976 *req_value, 3977 (long int)be64_to_cpu(crq->request_capability_rsp. 3978 number), name); 3979 3980 if (be16_to_cpu(crq->request_capability_rsp.capability) == 3981 REQ_MTU) { 3982 pr_err("mtu of %llu is not supported. Reverting.\n", 3983 *req_value); 3984 *req_value = adapter->fallback.mtu; 3985 } else { 3986 *req_value = 3987 be64_to_cpu(crq->request_capability_rsp.number); 3988 } 3989 3990 ibmvnic_send_req_caps(adapter, 1); 3991 return; 3992 default: 3993 dev_err(dev, "Error %d in request cap rsp\n", 3994 crq->request_capability_rsp.rc.code); 3995 return; 3996 } 3997 3998 /* Done receiving requested capabilities, query IP offload support */ 3999 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4000 union ibmvnic_crq newcrq; 4001 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 4002 struct ibmvnic_query_ip_offload_buffer *ip_offload_buf = 4003 &adapter->ip_offload_buf; 4004 4005 adapter->wait_capability = false; 4006 adapter->ip_offload_tok = dma_map_single(dev, ip_offload_buf, 4007 buf_sz, 4008 DMA_FROM_DEVICE); 4009 4010 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 4011 if (!firmware_has_feature(FW_FEATURE_CMO)) 4012 dev_err(dev, "Couldn't map offload buffer\n"); 4013 return; 4014 } 4015 4016 memset(&newcrq, 0, sizeof(newcrq)); 4017 newcrq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 4018 newcrq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 4019 newcrq.query_ip_offload.len = cpu_to_be32(buf_sz); 4020 newcrq.query_ip_offload.ioba = 4021 cpu_to_be32(adapter->ip_offload_tok); 4022 4023 ibmvnic_send_crq(adapter, &newcrq); 4024 } 4025 } 4026 4027 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 4028 struct ibmvnic_adapter *adapter) 4029 { 4030 struct device *dev = &adapter->vdev->dev; 4031 struct net_device *netdev = adapter->netdev; 4032 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 4033 struct ibmvnic_login_buffer *login = adapter->login_buf; 4034 int i; 4035 4036 dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, 4037 DMA_TO_DEVICE); 4038 dma_unmap_single(dev, adapter->login_rsp_buf_token, 4039 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 4040 4041 /* If the number of queues requested can't be allocated by the 4042 * server, the login response will return with code 1. We will need 4043 * to resend the login buffer with fewer queues requested. 4044 */ 4045 if (login_rsp_crq->generic.rc.code) { 4046 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 4047 complete(&adapter->init_done); 4048 return 0; 4049 } 4050 4051 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4052 4053 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 4054 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 4055 netdev_dbg(adapter->netdev, "%016lx\n", 4056 ((unsigned long int *)(adapter->login_rsp_buf))[i]); 4057 } 4058 4059 /* Sanity checks */ 4060 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 4061 (be32_to_cpu(login->num_rxcomp_subcrqs) * 4062 adapter->req_rx_add_queues != 4063 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 4064 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 4065 ibmvnic_remove(adapter->vdev); 4066 return -EIO; 4067 } 4068 release_login_buffer(adapter); 4069 complete(&adapter->init_done); 4070 4071 return 0; 4072 } 4073 4074 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 4075 struct ibmvnic_adapter *adapter) 4076 { 4077 struct device *dev = &adapter->vdev->dev; 4078 long rc; 4079 4080 rc = crq->request_unmap_rsp.rc.code; 4081 if (rc) 4082 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 4083 } 4084 4085 static void handle_query_map_rsp(union ibmvnic_crq *crq, 4086 struct ibmvnic_adapter *adapter) 4087 { 4088 struct net_device *netdev = adapter->netdev; 4089 struct device *dev = &adapter->vdev->dev; 4090 long rc; 4091 4092 rc = crq->query_map_rsp.rc.code; 4093 if (rc) { 4094 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 4095 return; 4096 } 4097 netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n", 4098 crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages, 4099 crq->query_map_rsp.free_pages); 4100 } 4101 4102 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 4103 struct ibmvnic_adapter *adapter) 4104 { 4105 struct net_device *netdev = adapter->netdev; 4106 struct device *dev = &adapter->vdev->dev; 4107 long rc; 4108 4109 atomic_dec(&adapter->running_cap_crqs); 4110 netdev_dbg(netdev, "Outstanding queries: %d\n", 4111 atomic_read(&adapter->running_cap_crqs)); 4112 rc = crq->query_capability.rc.code; 4113 if (rc) { 4114 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 4115 goto out; 4116 } 4117 4118 switch (be16_to_cpu(crq->query_capability.capability)) { 4119 case MIN_TX_QUEUES: 4120 adapter->min_tx_queues = 4121 be64_to_cpu(crq->query_capability.number); 4122 netdev_dbg(netdev, "min_tx_queues = %lld\n", 4123 adapter->min_tx_queues); 4124 break; 4125 case MIN_RX_QUEUES: 4126 adapter->min_rx_queues = 4127 be64_to_cpu(crq->query_capability.number); 4128 netdev_dbg(netdev, "min_rx_queues = %lld\n", 4129 adapter->min_rx_queues); 4130 break; 4131 case MIN_RX_ADD_QUEUES: 4132 adapter->min_rx_add_queues = 4133 be64_to_cpu(crq->query_capability.number); 4134 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 4135 adapter->min_rx_add_queues); 4136 break; 4137 case MAX_TX_QUEUES: 4138 adapter->max_tx_queues = 4139 be64_to_cpu(crq->query_capability.number); 4140 netdev_dbg(netdev, "max_tx_queues = %lld\n", 4141 adapter->max_tx_queues); 4142 break; 4143 case MAX_RX_QUEUES: 4144 adapter->max_rx_queues = 4145 be64_to_cpu(crq->query_capability.number); 4146 netdev_dbg(netdev, "max_rx_queues = %lld\n", 4147 adapter->max_rx_queues); 4148 break; 4149 case MAX_RX_ADD_QUEUES: 4150 adapter->max_rx_add_queues = 4151 be64_to_cpu(crq->query_capability.number); 4152 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 4153 adapter->max_rx_add_queues); 4154 break; 4155 case MIN_TX_ENTRIES_PER_SUBCRQ: 4156 adapter->min_tx_entries_per_subcrq = 4157 be64_to_cpu(crq->query_capability.number); 4158 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 4159 adapter->min_tx_entries_per_subcrq); 4160 break; 4161 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 4162 adapter->min_rx_add_entries_per_subcrq = 4163 be64_to_cpu(crq->query_capability.number); 4164 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 4165 adapter->min_rx_add_entries_per_subcrq); 4166 break; 4167 case MAX_TX_ENTRIES_PER_SUBCRQ: 4168 adapter->max_tx_entries_per_subcrq = 4169 be64_to_cpu(crq->query_capability.number); 4170 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 4171 adapter->max_tx_entries_per_subcrq); 4172 break; 4173 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 4174 adapter->max_rx_add_entries_per_subcrq = 4175 be64_to_cpu(crq->query_capability.number); 4176 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 4177 adapter->max_rx_add_entries_per_subcrq); 4178 break; 4179 case TCP_IP_OFFLOAD: 4180 adapter->tcp_ip_offload = 4181 be64_to_cpu(crq->query_capability.number); 4182 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 4183 adapter->tcp_ip_offload); 4184 break; 4185 case PROMISC_SUPPORTED: 4186 adapter->promisc_supported = 4187 be64_to_cpu(crq->query_capability.number); 4188 netdev_dbg(netdev, "promisc_supported = %lld\n", 4189 adapter->promisc_supported); 4190 break; 4191 case MIN_MTU: 4192 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 4193 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4194 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 4195 break; 4196 case MAX_MTU: 4197 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 4198 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4199 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 4200 break; 4201 case MAX_MULTICAST_FILTERS: 4202 adapter->max_multicast_filters = 4203 be64_to_cpu(crq->query_capability.number); 4204 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 4205 adapter->max_multicast_filters); 4206 break; 4207 case VLAN_HEADER_INSERTION: 4208 adapter->vlan_header_insertion = 4209 be64_to_cpu(crq->query_capability.number); 4210 if (adapter->vlan_header_insertion) 4211 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 4212 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 4213 adapter->vlan_header_insertion); 4214 break; 4215 case RX_VLAN_HEADER_INSERTION: 4216 adapter->rx_vlan_header_insertion = 4217 be64_to_cpu(crq->query_capability.number); 4218 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 4219 adapter->rx_vlan_header_insertion); 4220 break; 4221 case MAX_TX_SG_ENTRIES: 4222 adapter->max_tx_sg_entries = 4223 be64_to_cpu(crq->query_capability.number); 4224 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 4225 adapter->max_tx_sg_entries); 4226 break; 4227 case RX_SG_SUPPORTED: 4228 adapter->rx_sg_supported = 4229 be64_to_cpu(crq->query_capability.number); 4230 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 4231 adapter->rx_sg_supported); 4232 break; 4233 case OPT_TX_COMP_SUB_QUEUES: 4234 adapter->opt_tx_comp_sub_queues = 4235 be64_to_cpu(crq->query_capability.number); 4236 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 4237 adapter->opt_tx_comp_sub_queues); 4238 break; 4239 case OPT_RX_COMP_QUEUES: 4240 adapter->opt_rx_comp_queues = 4241 be64_to_cpu(crq->query_capability.number); 4242 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 4243 adapter->opt_rx_comp_queues); 4244 break; 4245 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 4246 adapter->opt_rx_bufadd_q_per_rx_comp_q = 4247 be64_to_cpu(crq->query_capability.number); 4248 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 4249 adapter->opt_rx_bufadd_q_per_rx_comp_q); 4250 break; 4251 case OPT_TX_ENTRIES_PER_SUBCRQ: 4252 adapter->opt_tx_entries_per_subcrq = 4253 be64_to_cpu(crq->query_capability.number); 4254 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 4255 adapter->opt_tx_entries_per_subcrq); 4256 break; 4257 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 4258 adapter->opt_rxba_entries_per_subcrq = 4259 be64_to_cpu(crq->query_capability.number); 4260 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 4261 adapter->opt_rxba_entries_per_subcrq); 4262 break; 4263 case TX_RX_DESC_REQ: 4264 adapter->tx_rx_desc_req = crq->query_capability.number; 4265 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 4266 adapter->tx_rx_desc_req); 4267 break; 4268 4269 default: 4270 netdev_err(netdev, "Got invalid cap rsp %d\n", 4271 crq->query_capability.capability); 4272 } 4273 4274 out: 4275 if (atomic_read(&adapter->running_cap_crqs) == 0) { 4276 adapter->wait_capability = false; 4277 ibmvnic_send_req_caps(adapter, 0); 4278 } 4279 } 4280 4281 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 4282 struct ibmvnic_adapter *adapter) 4283 { 4284 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 4285 struct net_device *netdev = adapter->netdev; 4286 struct device *dev = &adapter->vdev->dev; 4287 u64 *u64_crq = (u64 *)crq; 4288 long rc; 4289 4290 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 4291 (unsigned long int)cpu_to_be64(u64_crq[0]), 4292 (unsigned long int)cpu_to_be64(u64_crq[1])); 4293 switch (gen_crq->first) { 4294 case IBMVNIC_CRQ_INIT_RSP: 4295 switch (gen_crq->cmd) { 4296 case IBMVNIC_CRQ_INIT: 4297 dev_info(dev, "Partner initialized\n"); 4298 adapter->from_passive_init = true; 4299 adapter->failover_pending = false; 4300 if (!completion_done(&adapter->init_done)) { 4301 complete(&adapter->init_done); 4302 adapter->init_done_rc = -EIO; 4303 } 4304 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 4305 break; 4306 case IBMVNIC_CRQ_INIT_COMPLETE: 4307 dev_info(dev, "Partner initialization complete\n"); 4308 adapter->crq.active = true; 4309 send_version_xchg(adapter); 4310 break; 4311 default: 4312 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 4313 } 4314 return; 4315 case IBMVNIC_CRQ_XPORT_EVENT: 4316 netif_carrier_off(netdev); 4317 adapter->crq.active = false; 4318 if (adapter->resetting) 4319 adapter->force_reset_recovery = true; 4320 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 4321 dev_info(dev, "Migrated, re-enabling adapter\n"); 4322 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 4323 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 4324 dev_info(dev, "Backing device failover detected\n"); 4325 adapter->failover_pending = true; 4326 } else { 4327 /* The adapter lost the connection */ 4328 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 4329 gen_crq->cmd); 4330 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 4331 } 4332 return; 4333 case IBMVNIC_CRQ_CMD_RSP: 4334 break; 4335 default: 4336 dev_err(dev, "Got an invalid msg type 0x%02x\n", 4337 gen_crq->first); 4338 return; 4339 } 4340 4341 switch (gen_crq->cmd) { 4342 case VERSION_EXCHANGE_RSP: 4343 rc = crq->version_exchange_rsp.rc.code; 4344 if (rc) { 4345 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 4346 break; 4347 } 4348 dev_info(dev, "Partner protocol version is %d\n", 4349 crq->version_exchange_rsp.version); 4350 if (be16_to_cpu(crq->version_exchange_rsp.version) < 4351 ibmvnic_version) 4352 ibmvnic_version = 4353 be16_to_cpu(crq->version_exchange_rsp.version); 4354 send_cap_queries(adapter); 4355 break; 4356 case QUERY_CAPABILITY_RSP: 4357 handle_query_cap_rsp(crq, adapter); 4358 break; 4359 case QUERY_MAP_RSP: 4360 handle_query_map_rsp(crq, adapter); 4361 break; 4362 case REQUEST_MAP_RSP: 4363 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 4364 complete(&adapter->fw_done); 4365 break; 4366 case REQUEST_UNMAP_RSP: 4367 handle_request_unmap_rsp(crq, adapter); 4368 break; 4369 case REQUEST_CAPABILITY_RSP: 4370 handle_request_cap_rsp(crq, adapter); 4371 break; 4372 case LOGIN_RSP: 4373 netdev_dbg(netdev, "Got Login Response\n"); 4374 handle_login_rsp(crq, adapter); 4375 break; 4376 case LOGICAL_LINK_STATE_RSP: 4377 netdev_dbg(netdev, 4378 "Got Logical Link State Response, state: %d rc: %d\n", 4379 crq->logical_link_state_rsp.link_state, 4380 crq->logical_link_state_rsp.rc.code); 4381 adapter->logical_link_state = 4382 crq->logical_link_state_rsp.link_state; 4383 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 4384 complete(&adapter->init_done); 4385 break; 4386 case LINK_STATE_INDICATION: 4387 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 4388 adapter->phys_link_state = 4389 crq->link_state_indication.phys_link_state; 4390 adapter->logical_link_state = 4391 crq->link_state_indication.logical_link_state; 4392 break; 4393 case CHANGE_MAC_ADDR_RSP: 4394 netdev_dbg(netdev, "Got MAC address change Response\n"); 4395 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 4396 break; 4397 case ERROR_INDICATION: 4398 netdev_dbg(netdev, "Got Error Indication\n"); 4399 handle_error_indication(crq, adapter); 4400 break; 4401 case REQUEST_STATISTICS_RSP: 4402 netdev_dbg(netdev, "Got Statistics Response\n"); 4403 complete(&adapter->stats_done); 4404 break; 4405 case QUERY_IP_OFFLOAD_RSP: 4406 netdev_dbg(netdev, "Got Query IP offload Response\n"); 4407 handle_query_ip_offload_rsp(adapter); 4408 break; 4409 case MULTICAST_CTRL_RSP: 4410 netdev_dbg(netdev, "Got multicast control Response\n"); 4411 break; 4412 case CONTROL_IP_OFFLOAD_RSP: 4413 netdev_dbg(netdev, "Got Control IP offload Response\n"); 4414 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 4415 sizeof(adapter->ip_offload_ctrl), 4416 DMA_TO_DEVICE); 4417 complete(&adapter->init_done); 4418 break; 4419 case COLLECT_FW_TRACE_RSP: 4420 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 4421 complete(&adapter->fw_done); 4422 break; 4423 case GET_VPD_SIZE_RSP: 4424 handle_vpd_size_rsp(crq, adapter); 4425 break; 4426 case GET_VPD_RSP: 4427 handle_vpd_rsp(crq, adapter); 4428 break; 4429 default: 4430 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 4431 gen_crq->cmd); 4432 } 4433 } 4434 4435 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 4436 { 4437 struct ibmvnic_adapter *adapter = instance; 4438 4439 tasklet_schedule(&adapter->tasklet); 4440 return IRQ_HANDLED; 4441 } 4442 4443 static void ibmvnic_tasklet(void *data) 4444 { 4445 struct ibmvnic_adapter *adapter = data; 4446 struct ibmvnic_crq_queue *queue = &adapter->crq; 4447 union ibmvnic_crq *crq; 4448 unsigned long flags; 4449 bool done = false; 4450 4451 spin_lock_irqsave(&queue->lock, flags); 4452 while (!done) { 4453 /* Pull all the valid messages off the CRQ */ 4454 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 4455 ibmvnic_handle_crq(crq, adapter); 4456 crq->generic.first = 0; 4457 } 4458 4459 /* remain in tasklet until all 4460 * capabilities responses are received 4461 */ 4462 if (!adapter->wait_capability) 4463 done = true; 4464 } 4465 /* if capabilities CRQ's were sent in this tasklet, the following 4466 * tasklet must wait until all responses are received 4467 */ 4468 if (atomic_read(&adapter->running_cap_crqs) != 0) 4469 adapter->wait_capability = true; 4470 spin_unlock_irqrestore(&queue->lock, flags); 4471 } 4472 4473 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 4474 { 4475 struct vio_dev *vdev = adapter->vdev; 4476 int rc; 4477 4478 do { 4479 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 4480 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4481 4482 if (rc) 4483 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 4484 4485 return rc; 4486 } 4487 4488 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 4489 { 4490 struct ibmvnic_crq_queue *crq = &adapter->crq; 4491 struct device *dev = &adapter->vdev->dev; 4492 struct vio_dev *vdev = adapter->vdev; 4493 int rc; 4494 4495 /* Close the CRQ */ 4496 do { 4497 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4498 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4499 4500 /* Clean out the queue */ 4501 memset(crq->msgs, 0, PAGE_SIZE); 4502 crq->cur = 0; 4503 crq->active = false; 4504 4505 /* And re-open it again */ 4506 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4507 crq->msg_token, PAGE_SIZE); 4508 4509 if (rc == H_CLOSED) 4510 /* Adapter is good, but other end is not ready */ 4511 dev_warn(dev, "Partner adapter not ready\n"); 4512 else if (rc != 0) 4513 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 4514 4515 return rc; 4516 } 4517 4518 static void release_crq_queue(struct ibmvnic_adapter *adapter) 4519 { 4520 struct ibmvnic_crq_queue *crq = &adapter->crq; 4521 struct vio_dev *vdev = adapter->vdev; 4522 long rc; 4523 4524 if (!crq->msgs) 4525 return; 4526 4527 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 4528 free_irq(vdev->irq, adapter); 4529 tasklet_kill(&adapter->tasklet); 4530 do { 4531 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4532 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4533 4534 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 4535 DMA_BIDIRECTIONAL); 4536 free_page((unsigned long)crq->msgs); 4537 crq->msgs = NULL; 4538 crq->active = false; 4539 } 4540 4541 static int init_crq_queue(struct ibmvnic_adapter *adapter) 4542 { 4543 struct ibmvnic_crq_queue *crq = &adapter->crq; 4544 struct device *dev = &adapter->vdev->dev; 4545 struct vio_dev *vdev = adapter->vdev; 4546 int rc, retrc = -ENOMEM; 4547 4548 if (crq->msgs) 4549 return 0; 4550 4551 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 4552 /* Should we allocate more than one page? */ 4553 4554 if (!crq->msgs) 4555 return -ENOMEM; 4556 4557 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 4558 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 4559 DMA_BIDIRECTIONAL); 4560 if (dma_mapping_error(dev, crq->msg_token)) 4561 goto map_failed; 4562 4563 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 4564 crq->msg_token, PAGE_SIZE); 4565 4566 if (rc == H_RESOURCE) 4567 /* maybe kexecing and resource is busy. try a reset */ 4568 rc = ibmvnic_reset_crq(adapter); 4569 retrc = rc; 4570 4571 if (rc == H_CLOSED) { 4572 dev_warn(dev, "Partner adapter not ready\n"); 4573 } else if (rc) { 4574 dev_warn(dev, "Error %d opening adapter\n", rc); 4575 goto reg_crq_failed; 4576 } 4577 4578 retrc = 0; 4579 4580 tasklet_init(&adapter->tasklet, (void *)ibmvnic_tasklet, 4581 (unsigned long)adapter); 4582 4583 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 4584 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, IBMVNIC_NAME, 4585 adapter); 4586 if (rc) { 4587 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 4588 vdev->irq, rc); 4589 goto req_irq_failed; 4590 } 4591 4592 rc = vio_enable_interrupts(vdev); 4593 if (rc) { 4594 dev_err(dev, "Error %d enabling interrupts\n", rc); 4595 goto req_irq_failed; 4596 } 4597 4598 crq->cur = 0; 4599 spin_lock_init(&crq->lock); 4600 4601 return retrc; 4602 4603 req_irq_failed: 4604 tasklet_kill(&adapter->tasklet); 4605 do { 4606 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 4607 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 4608 reg_crq_failed: 4609 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 4610 map_failed: 4611 free_page((unsigned long)crq->msgs); 4612 crq->msgs = NULL; 4613 return retrc; 4614 } 4615 4616 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter) 4617 { 4618 struct device *dev = &adapter->vdev->dev; 4619 unsigned long timeout = msecs_to_jiffies(30000); 4620 u64 old_num_rx_queues, old_num_tx_queues; 4621 int rc; 4622 4623 adapter->from_passive_init = false; 4624 4625 old_num_rx_queues = adapter->req_rx_queues; 4626 old_num_tx_queues = adapter->req_tx_queues; 4627 4628 init_completion(&adapter->init_done); 4629 adapter->init_done_rc = 0; 4630 ibmvnic_send_crq_init(adapter); 4631 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4632 dev_err(dev, "Initialization sequence timed out\n"); 4633 return -1; 4634 } 4635 4636 if (adapter->init_done_rc) { 4637 release_crq_queue(adapter); 4638 return adapter->init_done_rc; 4639 } 4640 4641 if (adapter->from_passive_init) { 4642 adapter->state = VNIC_OPEN; 4643 adapter->from_passive_init = false; 4644 return -1; 4645 } 4646 4647 if (adapter->resetting && !adapter->wait_for_reset && 4648 adapter->reset_reason != VNIC_RESET_MOBILITY) { 4649 if (adapter->req_rx_queues != old_num_rx_queues || 4650 adapter->req_tx_queues != old_num_tx_queues) { 4651 release_sub_crqs(adapter, 0); 4652 rc = init_sub_crqs(adapter); 4653 } else { 4654 rc = reset_sub_crq_queues(adapter); 4655 } 4656 } else { 4657 rc = init_sub_crqs(adapter); 4658 } 4659 4660 if (rc) { 4661 dev_err(dev, "Initialization of sub crqs failed\n"); 4662 release_crq_queue(adapter); 4663 return rc; 4664 } 4665 4666 rc = init_sub_crq_irqs(adapter); 4667 if (rc) { 4668 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4669 release_crq_queue(adapter); 4670 } 4671 4672 return rc; 4673 } 4674 4675 static int ibmvnic_init(struct ibmvnic_adapter *adapter) 4676 { 4677 struct device *dev = &adapter->vdev->dev; 4678 unsigned long timeout = msecs_to_jiffies(30000); 4679 int rc; 4680 4681 adapter->from_passive_init = false; 4682 4683 init_completion(&adapter->init_done); 4684 adapter->init_done_rc = 0; 4685 ibmvnic_send_crq_init(adapter); 4686 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 4687 dev_err(dev, "Initialization sequence timed out\n"); 4688 return -1; 4689 } 4690 4691 if (adapter->init_done_rc) { 4692 release_crq_queue(adapter); 4693 return adapter->init_done_rc; 4694 } 4695 4696 if (adapter->from_passive_init) { 4697 adapter->state = VNIC_OPEN; 4698 adapter->from_passive_init = false; 4699 return -1; 4700 } 4701 4702 rc = init_sub_crqs(adapter); 4703 if (rc) { 4704 dev_err(dev, "Initialization of sub crqs failed\n"); 4705 release_crq_queue(adapter); 4706 return rc; 4707 } 4708 4709 rc = init_sub_crq_irqs(adapter); 4710 if (rc) { 4711 dev_err(dev, "Failed to initialize sub crq irqs\n"); 4712 release_crq_queue(adapter); 4713 } 4714 4715 return rc; 4716 } 4717 4718 static struct device_attribute dev_attr_failover; 4719 4720 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 4721 { 4722 struct ibmvnic_adapter *adapter; 4723 struct net_device *netdev; 4724 unsigned char *mac_addr_p; 4725 int rc; 4726 4727 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 4728 dev->unit_address); 4729 4730 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 4731 VETH_MAC_ADDR, NULL); 4732 if (!mac_addr_p) { 4733 dev_err(&dev->dev, 4734 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 4735 __FILE__, __LINE__); 4736 return 0; 4737 } 4738 4739 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 4740 IBMVNIC_MAX_QUEUES); 4741 if (!netdev) 4742 return -ENOMEM; 4743 4744 adapter = netdev_priv(netdev); 4745 adapter->state = VNIC_PROBING; 4746 dev_set_drvdata(&dev->dev, netdev); 4747 adapter->vdev = dev; 4748 adapter->netdev = netdev; 4749 4750 ether_addr_copy(adapter->mac_addr, mac_addr_p); 4751 ether_addr_copy(netdev->dev_addr, adapter->mac_addr); 4752 netdev->irq = dev->irq; 4753 netdev->netdev_ops = &ibmvnic_netdev_ops; 4754 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 4755 SET_NETDEV_DEV(netdev, &dev->dev); 4756 4757 spin_lock_init(&adapter->stats_lock); 4758 4759 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 4760 INIT_LIST_HEAD(&adapter->rwi_list); 4761 spin_lock_init(&adapter->rwi_lock); 4762 adapter->resetting = false; 4763 4764 adapter->mac_change_pending = false; 4765 4766 do { 4767 rc = init_crq_queue(adapter); 4768 if (rc) { 4769 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 4770 rc); 4771 goto ibmvnic_init_fail; 4772 } 4773 4774 rc = ibmvnic_init(adapter); 4775 if (rc && rc != EAGAIN) 4776 goto ibmvnic_init_fail; 4777 } while (rc == EAGAIN); 4778 4779 rc = init_stats_buffers(adapter); 4780 if (rc) 4781 goto ibmvnic_init_fail; 4782 4783 rc = init_stats_token(adapter); 4784 if (rc) 4785 goto ibmvnic_stats_fail; 4786 4787 netdev->mtu = adapter->req_mtu - ETH_HLEN; 4788 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 4789 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 4790 4791 rc = device_create_file(&dev->dev, &dev_attr_failover); 4792 if (rc) 4793 goto ibmvnic_dev_file_err; 4794 4795 netif_carrier_off(netdev); 4796 rc = register_netdev(netdev); 4797 if (rc) { 4798 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 4799 goto ibmvnic_register_fail; 4800 } 4801 dev_info(&dev->dev, "ibmvnic registered\n"); 4802 4803 adapter->state = VNIC_PROBED; 4804 4805 adapter->wait_for_reset = false; 4806 4807 return 0; 4808 4809 ibmvnic_register_fail: 4810 device_remove_file(&dev->dev, &dev_attr_failover); 4811 4812 ibmvnic_dev_file_err: 4813 release_stats_token(adapter); 4814 4815 ibmvnic_stats_fail: 4816 release_stats_buffers(adapter); 4817 4818 ibmvnic_init_fail: 4819 release_sub_crqs(adapter, 1); 4820 release_crq_queue(adapter); 4821 free_netdev(netdev); 4822 4823 return rc; 4824 } 4825 4826 static int ibmvnic_remove(struct vio_dev *dev) 4827 { 4828 struct net_device *netdev = dev_get_drvdata(&dev->dev); 4829 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4830 4831 adapter->state = VNIC_REMOVING; 4832 rtnl_lock(); 4833 unregister_netdevice(netdev); 4834 4835 release_resources(adapter); 4836 release_sub_crqs(adapter, 1); 4837 release_crq_queue(adapter); 4838 4839 release_stats_token(adapter); 4840 release_stats_buffers(adapter); 4841 4842 adapter->state = VNIC_REMOVED; 4843 4844 rtnl_unlock(); 4845 device_remove_file(&dev->dev, &dev_attr_failover); 4846 free_netdev(netdev); 4847 dev_set_drvdata(&dev->dev, NULL); 4848 4849 return 0; 4850 } 4851 4852 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 4853 const char *buf, size_t count) 4854 { 4855 struct net_device *netdev = dev_get_drvdata(dev); 4856 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4857 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 4858 __be64 session_token; 4859 long rc; 4860 4861 if (!sysfs_streq(buf, "1")) 4862 return -EINVAL; 4863 4864 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 4865 H_GET_SESSION_TOKEN, 0, 0, 0); 4866 if (rc) { 4867 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 4868 rc); 4869 return -EINVAL; 4870 } 4871 4872 session_token = (__be64)retbuf[0]; 4873 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 4874 be64_to_cpu(session_token)); 4875 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4876 H_SESSION_ERR_DETECTED, session_token, 0, 0); 4877 if (rc) { 4878 netdev_err(netdev, "Client initiated failover failed, rc %ld\n", 4879 rc); 4880 return -EINVAL; 4881 } 4882 4883 return count; 4884 } 4885 4886 static DEVICE_ATTR_WO(failover); 4887 4888 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 4889 { 4890 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 4891 struct ibmvnic_adapter *adapter; 4892 struct iommu_table *tbl; 4893 unsigned long ret = 0; 4894 int i; 4895 4896 tbl = get_iommu_table_base(&vdev->dev); 4897 4898 /* netdev inits at probe time along with the structures we need below*/ 4899 if (!netdev) 4900 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 4901 4902 adapter = netdev_priv(netdev); 4903 4904 ret += PAGE_SIZE; /* the crq message queue */ 4905 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 4906 4907 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 4908 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 4909 4910 for (i = 0; i < be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 4911 i++) 4912 ret += adapter->rx_pool[i].size * 4913 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 4914 4915 return ret; 4916 } 4917 4918 static int ibmvnic_resume(struct device *dev) 4919 { 4920 struct net_device *netdev = dev_get_drvdata(dev); 4921 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 4922 4923 if (adapter->state != VNIC_OPEN) 4924 return 0; 4925 4926 tasklet_schedule(&adapter->tasklet); 4927 4928 return 0; 4929 } 4930 4931 static const struct vio_device_id ibmvnic_device_table[] = { 4932 {"network", "IBM,vnic"}, 4933 {"", "" } 4934 }; 4935 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 4936 4937 static const struct dev_pm_ops ibmvnic_pm_ops = { 4938 .resume = ibmvnic_resume 4939 }; 4940 4941 static struct vio_driver ibmvnic_driver = { 4942 .id_table = ibmvnic_device_table, 4943 .probe = ibmvnic_probe, 4944 .remove = ibmvnic_remove, 4945 .get_desired_dma = ibmvnic_get_desired_dma, 4946 .name = ibmvnic_driver_name, 4947 .pm = &ibmvnic_pm_ops, 4948 }; 4949 4950 /* module functions */ 4951 static int __init ibmvnic_module_init(void) 4952 { 4953 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 4954 IBMVNIC_DRIVER_VERSION); 4955 4956 return vio_register_driver(&ibmvnic_driver); 4957 } 4958 4959 static void __exit ibmvnic_module_exit(void) 4960 { 4961 vio_unregister_driver(&ibmvnic_driver); 4962 } 4963 4964 module_init(ibmvnic_module_init); 4965 module_exit(ibmvnic_module_exit); 4966